Black raspberries contain powerful antioxidants which have been proven to suppress tumour development
Black raspberries may help prevent bowel cancer, new research suggests.
Scientists found that a freeze-dried version of the fruit could reduce the number of tumours in a strain of mice prone to the disease by 60 per cent.
The incidence of bowel tumours was cut by 45 per cent.
Previous research had indicated that black raspberries have antioxidant and anti-cancer properties.
In the study, the fruit inhibited tumour development by suppressing a protein called beta-catenin.
Tumour incidence and numbers were both reduced by 50 per cent in another strain of mouse vulnerable to colitis, an inflammation of the large intestine that can contribute to bowel cancer.
"We saw the black raspberry as a natural product, very powerful, and easy to access," said study leader Dr Wancai Yang, from the University of Illinois in Chicago.
The findings were published today in the journal Cancer Prevention and Research.
Both mouse strains were either fed a Western-style, high fat diet, or the same diet supplemented with 10 per cent freeze-dried black raspberry powder for 12 weeks.
Scientists saw a broad range of protective effects in the bowels of the mice given the supplement.
Black raspberries are native to the US and are a popular fruit among home gardeners, although they are less common in the UK.
التوت البري الأسود لمحاربة سرطان الأمعاء
واشنطن - ي ب ا
أظهرت دراسة جديدة أن التوت البري الأسود قد يساعد في الوقاية من سرطان الأمعاء.
وتبيّن في الدراسة الجديدة التي أجراها فريق علماء في جامعة أوهايو أن هذه الفاكهة توقف نمو الورم عبر قمع بروتين اسمه "بيتا كاتينين"، وذلك من خلال مركّب اسمه "أنتوسيانين" الذي يعطيها لونها الأسود إضافة إلى فيتامينات مكافحة للسرطان ومعادن وحوامض.
وقال أحد المشاركين في الدراسة، البروفسور في كلية الطب بجامعة أوهايو غاري ستونر لموقع "هلث نيوز" الأميركي انه بسبب النسبة العالية من هذا المركّب يتمتع التوت البري بنشاط كبير مضاد للأكسدة وهو ما يجعله فعالاً جداً في محاربة الخلايا السرطانية.
وتوصّل العلماء إلى أن التوت البري المجفف والمجلّد منع تشكّل الأورام الخبيثة في أمعاء فئران معدّة للإصابة بسرطان الأمعاء، بنسبة 45%. وإذا تم التوصّل إلى النتائج ذاتها عند البشر فقد تستخدم هذه الفاكهة في تفادي سرطان الأمعاء
=================
الأميركيات الأفارقة أكثر عرضة لتكرر الإصابة
نوع العِرق البشري قد يؤثر على تكرر الإصابة بسرطان الرحم
واشنطن - ي ب ا :
أظهرت دراسة أميركية جديدة أن نوع العِرق البشري قد يؤثر على تكرر الإصابة بسرطان الرحم رغم الاستئصال الكامل للرحم أو معالجة المرض عبر الأشعة.
وأفاد موقع "ساينس ديلي" الاميركي عن الباحثين في مستشفى "هنري فورد" أن الأميركيات الأفارقة هن على الأرجح أكثر عرضة لتكرر الإصابة بسرطان الرحم حتى بعد استئصاله ومعالجته بالأشعة.
ونقلت عن المسؤول عن الدراسة الطبيب محمد الشيخ قوله إنه " أجري للمريضات الأميركيات الأفارقة في دراستنا جراحات وعلاج بالأشعة مماثل للمرضى القوقازيين"، وكانت النتيجة أن الأوائل تكررت عندهن الإصابة بالمرض.
وأضاف "في هذه المرحلة، ستكون الخطوة اللاحقة النظر بإمعان في البيولوجيا الجزئية لهذه الخلايا السرطانية من اجل المساعدة على تحديد سبب أن العرق هو مؤشر سلبي لمحصلة سرطان الرحم".
ووجدت الدراسة أيضاً أن مرحلة المرض وعمر المريضة يشكلان عاملي خطر لتكرر الإصابة بسرطان الرحم
"The African American patients in our study had similar surgeries and radiation therapy as the Caucasian patients in the study. So access to care certainly wasn't a factor in race being identified as a negative predictor for outcome," says lead author Mohamed Elshaikh, M.D., senior staff physician in the Department of Radiation Oncology at Henry Ford Hospital.
"At this point, our next step is to take a closer look at the underlying molecular biology of these cancer cells to help identify a cause for race being a negative predictor for uterine cancer outcome."
This retrospective study - one of the largest of its kind with 750 uterine cancer patients - will be presented Nov. 2 at the 52nd annual American Society for Radiation Oncology (ASTRO) meeting in San Diego. Results also are now online in the November issue of the International Journal of Radiation Oncology
What's notable about our study is that we were able to confirm on a larger scale the known prognostic factors in uterine cancer, and also identify African American race as a negative predictor for outcome despite adequate surgery and radiation treatment," says Dr. Elshaikh.
Endometrial cancers mainly arise from the tissue lining the uterus. They are the most common gynecologic cancers in the United States, with more than 43,000 women diagnosed and an estimated 7,950 dying from the disease in 2010, according to the National Cancer Institute. The most common type, endometrioid adenocarcinoma, typically occurs within a few decades of menopause.
While a total hysterectomy (surgical removal of the uterus) is the most common therapeutic approach, treating physicians often differ on the next step for treatment after surgery. Some recommend radiation treatment, while others recommend no further treatment.
For the Henry Ford study, Dr. Elshaikh and his colleagues identified 750 patients with stage I or II uterine cancer who underwent a total hysterectomy between 1987 and 2008. The median age was 64, and 30 percent of the study group were African American.
The study was limited to those patients who underwent surgery and received no further treatment, and those who underwent surgery and had radiation therapy.
Recurrence-free survival for the study group at 5 years and 10 years was 94 percent and 93 percent, respectively.
The median time for uterine cancer recurrence among the group was 1.2 years.
The site of recurrence was primarily vaginal (74 percent) for those who did not receive radiation therapy.
The study also found that higher tumor grade and cancer stage, along with age (older than 65), were risk factors for uterine cancer returning after treatment. African American patients in the study also were more likely to have their cancer return than Caucasian patients.
بريطانية تلد توأمين بلوني العاج والأبنوس:'Ebony and Ivory'
04 تشرين ثاني, 2010
بريطانية تلد توأمين بلوني العاج والأبنوس
التوأمان ليو وهوب
لندن الرياض
لا تواجه أم بريطانية أي مشكلة في تمييز توأميها إذ أن احدهما ولد بلون اسمر والآخر ابيض.
وكانت الدهشة قد تملكت شيرلي ويلز( 21 عاما)، التي ولدت بعملية قيصرية، عندما تسلمت الطفلين من يد الممرضة .ويعود السبب إلى انه بينما كان الطفل ليو يشبه والدته ، وهي من غرينادا، ببشرته السمراء وعينيه العسليتين وشعره الكثيف ، كانت ابنتها هوب صورة طبق الأصل من أبيها ، بلونها الأبيض وعينيها الزرقاوين وشعرها الخفيف المتفرق.
وخرج ليو إلى الحياة أولا بوزن بلغ 5 ارطال و14 أوقية ثم تبعته هوب بوزن بلغ 6 أرطال و3 أوقيات. وتمت الولادة بمستشفى ديويسبيري بغربي يوركشاير.
وتقول شيرلي:"كنت اعلم انني حامل بتوأمين وان احدهما ذكر والآخر أنثى ولكنني ما كنت اصدق عندما أخبرتني الممرضة بعد ولادتهما بان لونيهما مختلفان. وطوال فترة الحمل كنت أمازح صديقاتي حول الحمل بطفلين احدهما ابيض والآخر اسود وإنني قد اسميهما "أبنوس" و"عاج". ولكن بعد ولادتهما رأيت أن من السخف تسميتهما بهذين الاسمين."
وتعود جذور شيرلي إلى أبوين من غرينادا في حين أن زوجها ابيض اللون. ويقول متحدث باسم مؤسسة الولادات المتعددة ببريطانيا موضحا حالة التوأمين ليو وهوب، البالغ عمرهما 4 أشهر الآن، إن حيوانين منويين منفصلين خصبا بويضتين منفصلتين وترتب على ذلك أن اختلفت المورثة التي تحدد لون الجلد ، ما أدى إلى اختلاف لوني التوأمين.
A mother has no problem telling her newborn twins apart - because one was born black and the other white.
Shirley Wales, 21, who gave birth by caesarean section, was astonished when the midwife handed her her children.
For while son Leo resembled his Grenadian mother, with dark skin, brown eyes and thick hair, her daughter Hope was the image of her father, with light skin, blue eyes and fair sparse hair.
'Ebony and Ivory': Leo (left) and Hope are twins but have inherited different skin and hair colours from their parents
Leo was born first weighing 5lb 14oz closely followed by his sister Hope at 6lb 3oz at Dewsbury District Hospital, West Yorkshire.
Shirley said: 'I knew I was having twins, and I knew one was a boy and one was a girl, but I couldn't believe it when the midwife told me they had different skin tones after I'd given birth to them.
'Throughout the pregnancy I'd joked about the babies being black and white, I even said to my friends that if one was black and one was white I'd call them Ebony and Ivory. When they were born though, I realised it would be cruel to actually call them that.
'I immediately noticed that Hope was completely white and although they didn't look that different when they were first born, because they both had a bit of jaundice, I could tell Leo's skin was going to get darker and Hope's was going to stay white.'
Shirley texted all her friends with the surprising news.
Shirley, 21, is from Grenadian descent. While Leo takes after her, daughter Hope looks like her father
She said: 'I had about 100 visitors in the first couple of days because people wouldn't believe me until they had seen it for themselves.'
Shirley's parents are both Grenadian while the twins' father, who she is no longer in a relationship with, is white. She discovered she was pregnant just nine days after her babies were conceived.
Shirley said her children were noticeably different despite both having jaundice
'I knew I was pregnant, I just had a feeling something wasn't right. My birth dad is a twin so obviously I realised I could be having twins but it wasn't until the 20-week scan that the midwife confirmed it.
'I was over the moon when I found out, I wanted to have one boy and one girl, so it was perfect,' the hairdresser from Batley, West Yorkshire said.
Now 14 weeks old, little Leo and Hope have settled into their own routine and are developing their individual personalities.
Shirley said: 'They're my little miracles. They are so different, they're absolutely worlds apart.
'I call them Leo the Lion and Happy Hope, Leo gets angry when he isn't getting attention because his sister seems to get a bit more attention from people, whereas Hope is always smiling at everybody all the time.
'If I didn't have Leo with me, people would think Hope was my niece, but that doesn't bother me really. I love telling people that she is actually my baby.
'People just need to be open-minded, it can happen. I'm thrilled about it.'
A spokesperson for the Multiple Births Foundation said: 'Two separate eggs were fertilised by two separate sperm.
'The genes that go into defining skin colour will be different which results in a combination of genes.
الإفراط في استخدام الجوال «ينوّم» الحيوانات المنوية
04 تشرين ثاني, 2010
الإفراط في استخدام الجوال «ينوّم» الحيوانات المنوية
روما- ي ب ا
حذّر باحثون إيطاليون من أن الاستخدام المفرط للهاتف الخليوي يهدد بوقف حركة الحيوانات المنوية لدى الرجل ما يؤدي إلى العقم.
ونقلت وكالة الأنباء الإيطالية "أنسا" عن الباحثة أندريا لينزي المتخصصة في مجال الطب الجنسي إن دراسة أجرتها عدد من الجامعات الإيطالية أظهرت وجود "علاقة بين استخدام الهاتف الخليوي وتدهور حركة الحيوانات المنوية".
وأضافت "يبدو أن موجات (الخليوي) تجعل الحيوانات المنوية تنام".
غير أن لينزي أوضحت أن الدراسات لا تزال في بدايتها ويتم دراسة عوامل أخرى تساهم في ذلك، وقالت "الأشخاص الذي يتحدثون كثيراً عبر الهاتف الخليوي هم غالباً أكثر توتراً أو يدخنون ويشربون الخمور أكثر ويمكن لذلك أن يؤثر على نوعية الحيوانات المنوية".
وشملت الدراسة عينات من حيوانات منوية لرجال يتكلمون بين نصف ساعة و4 ساعات في اليوم عبر الهاتف الخليوي، وستقدم في اجتماع علمي اليوم الخميس تقدم فيه أيضاً معلومات حول المواد الغذائية الغنية بالأكسيدات التي يتعين على الرجال تناولها لتعزيز عدد الحيوانات المنوية
Mobile Phone-Curse to Sex Life
Imagine your life without a mobile phone. Now, can you live without sex? What do you prefer most: life without sex or life without Mobile? Well! Answer is, though difficult to accept, but apparently obvious., The above question has a strong base with an alarming adverse effect of mobile phone on fertility and sex organs, especially of male. Above all, eyes, breast, heart, testicles are the main body parts that absorb the energy most and react faster to change in energy.
Scientists blame mobile phone for million ofmen being unable to father a baby. A study has discovered that excessive use of mobile can have about 30% lower count of sperms. Radiations from a mobile phone can cause serious damage to the sperms and can affect, along with quality, the major four potencies of sperms– sperm count, sperms motility, sperm morphology and sperm viability. Sperm is temperature sensitive and emission from mobile phone raises the temperature of groin area, which may be the reason for fall in count and quality of the sperms. The more we use the mobile phone; the less will be the count of sperms. Keeping the phone in the trousers pocket and even in the belt of trousers cannot really save sperms from the radiations of mobile phone. Mobile phone emit moreheat while talking or smsing or using net or etc.but emission is also there when mobile phone are even not in use. Surprisingly, Mobile phones emit some radiations in switched off mode. Beware man! Mobile phone can rot your balls.
Another study has come out with thehazard of using mobile phone while pregnancy.Study has shown some significant effects of excess use of mobile phone by pregnant woman. There are plentiful ill-effects upsetting the physical, mental, and emotional state of a pregnant mother. Study also explains the behavioral disorder in the child of woman who used mobile phone a lot during her pregnancy. Growth of embryo is even disturbed by the radiations of mobile phone.
Exposure to mobile phone plays a significant role in increased level of stress. Even, mobile phone has hoisted many other health related problems counting hearing problem, serious diseases like head and brain tumors/cancers. Help yourself. Use mobile phone scarcely and adequately keeping it as much as possible away from the body
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Mobile phone technology is really a most wanted technology in this century. More then 80% people use this technology world wide to connect their beloved or for business and other purpose. We know that Excess use of everything is bad. Survey results of mobile user we find out that more than 50% mobile user are teenagers.
Excessive uses of mobile phone really badly affect your health, mobile phone excessive use badly affective in different ways details as under:-
Cancer / Tumors
Studies have been conducted suggesting that rats that have been exposed to microwaves similar to the sort generated by mobile phones but more powerful, showed breaks in their DNA which could indicate an adverse effect. Also, mice exposed to radiation for 18 months developed brain tumors. Though of course, these studies are not concrete proof. Blood Pressure
It was observed that people using cell phones were prone to high blood pressure. Again, there isn’t any concrete evidence of the same. Pregnancy
A study at the University of Montpellier in France was carried out on 6000 chick embryos and suggested that the heavily exposed chick eggs were five times less likely to survive than the control group. This study raised questions about possible effects on pregnant women but it has not yet appeared in peer-reviewed scientific literature or been reproduced, so its findings are difficult to assess. Headaches, Heating Effects, Fatigue
A study brought out that longer the people used mobile phones, the more likely they were to report symptoms such as hot ears, burning skin, headaches and fatigue. The study did not include a control group (that is people who do not use mobile phones, to make a comparison); therefore the symptoms reported could have been caused by any number of other factors in the mobile phones users’ environment, such as working with computers, stress, driving or reading. Memory
There have been various studies into the connection between mobile phones and memory loss. A study looked into the effect of radiofrequency (RF) on the section of rats’ brains that is linked with the memory. The results showed that RF could modify signals in the cells in a part of the brain that is responsible for learning and short term memory. Posture (holding phone between raised shoulder and ear)
Some researchers claim that holding a mobile phone between the raised shoulder and the ear could have a damaging effect on muscles, bones, tendons and discs. These problems would apply equally to a cordless phone or a landline phone as to a mobile phone and are the effect of bad posture.
Decreased Male Fertility Male who used cell phones for more than four hours per day had markedly poorer sperm quality than their counterparts with lower cell phone usage. Recently, the same team delved deeper. In a study published in Fertility & Sterility, they obtained sperm samples from 32 men and split them into 2 groups – control and test. After being placed an inch from a 850-Mhz cell phone which was in ‘talk’ mode, the sperm in the test group samples had higher levels of harmful free radicals as well as lower levels of protective antioxidants as compared to the control group, i.e. the unexposed sperm. These resulted in a drop in the affected sperm’s function, motility as well as overall health. There was, however, no significant difference in DNA damage between the two groups. This is a small, laboratory-based study, and more research is definitely still needed in this area. On top of that, sperm in men would actually be further away from cell phones, and also be protected by a few layers of human tissue. However, despite these factors, the findings of this study still offer cause for concern, and men, especially those planning to start a family, may want to keep their cell phones as far away from their reproductive parts as possible.
How we can save us
Cell phones should be used for emergencies, and not for long conversations.
A small chip-like cell phone microwave radiation protection device is available, which has the ability to absorb electromagnetic energy waves from your mobile phone. It helps in reducing the potential harmful effects of these emissions to the human body.
Using a mobile headset is a good idea, you don’t have to hold phones next to your ears all the time
Use a hands free mobile car kit while driving, without taking your hands off the steering wheel
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Are Cell Phones & Wireless Networks Hazardous?
Cell Phones (hand-held mobile phones) Emit Microwave Radiation
Cell (mobile) phones & wireless networks emit radiation in the microwave frequency range. Just as microwave radiation cooks food at high levels, it causes damage to human tissue and DNA at low levels.
"Neither radiofrequency (30 kHz-300MHz) nor microwave fields (300-3000 MHz) exist as significant components of the natural terrestrial electromagnetic environment. In consequence, our human generation is the first to voluntarily expose itself to artificial RF/microwave fields that cover a wide spectrum of frequencies and intensities. Typical mobile phones radiate an average power of 0.2-0.6 W. When hand-held and operated close to the head, background levels are sharply distorted, with 40 percent of radiated phone energy absorbed in the hand and the head ([Kuster et al., 1997]). In this mode of operation, a mobile phone may be regarded as a quite powerful radio transmitter. Its emission at the head surface is typically 10,000 times stronger than fields reaching the head of a user standing within 30m of the base of a typical mobile phone relay transponder mounted on a tower 30m above ground." W. Ross Adey, International Encyclopedia of Neuroscience
Microwave Radiation is Hazardous
Thousands of independent scientific studies have clearly shown that exposure to microwave radiation can cause severe and long-lasting damage, however, it might take years for the damage to produce noticable symptoms in some people.
A 10 year industry sponsored study determined that cell phones are not safe, according to the program's director, George Carlo, who was fired after presenting his findings and threatened to not reveal his discoveries.
Norbert Hankin, an environmental scientist in the US Environmental Protection Agency (EPA), has studied the effects of radio frequency/microwave radiation for 33 years says some of the research findings are "worrisome."
Even the notoriously corrupt U.S. Food and Drug Administration (FDA) reports, "the available scientific evidence does not allow us to conclude that mobile phones are absolutely safe."
Industry Coverup
The $100 Billion/year cell phone industry has enough power to ensure that the truth about its products are not known. Mass media makes so much money from cell phone advertising that few of them are willing to publish articles illuminating the hazards of cell phones.
The cell phone industry is following some of the same tactics used by the tobacco industry and has paid for hundreds of studies designed specifically to show that microwave radiation is not harmful and avoid showing the real effects.
Industry studies were used by the World Health Organization (WHO) to develop its policy that cell phones are safe. The man who created the pro-industry policy at the WHO was employed by the industry before, during and after he created the policy.
What are the effects of the radiation?
While industry sponsored studies have failed to show a clear link between microwave radiation and brain tumors (there are other effects which have been ignored by industry studies), independent scientific studies show that microwave radiation does indeed cause brain tumors and numerous other serious health problems.
Microwave signals travel through human tissue, glass, metal and plastic. Human tissue also absorbs microwave radiation. The effect of even minute levels of microwave radiation has been shown to:
open the blood-brain barrier
damage hemoglobin
heat head & brain tissue
disrupt brain activity
destroy brain cells
cause gas pockets in eyes
reverse cell membrane polarity
alter brain waves
alter brain chemistry
damage DNA
cause tumors
speed tumor growth
increase blood flow
damage skin cells
The damaging effects of the radiation can produce a wide range of physical symptoms. Some symptoms may take years to show up. Some of the effects can be short-term while other effects are long-term or permanent. Opening the blood-brain barrier allows toxins into the brain that cause a wide range of ailments - many of which are currently unknown or poorly understood.
Some symptoms of cell phone usage:
headaches
cataracts, eye damage
hair loss
memory loss
anxiety
mood swings (rage, depression)
fatigue
loss of concentration
lack of coordination
pain & tingling in hands or arms
nausea
sleep disorders
electro-magnetic sensitivity
The Facts
The safety of microwave radiation is no longer in question. The laws of physics dictate that the radiation is harmful. Hundreds of independent scientific studies have clearly shown that if you use a cell phone or are continually exposed to microwave radiation from a wireless network, microwave tower or other microwave emitting device you are at risk for delibitating and life threatening illness.
Following are just a few of the studies that show the risks associated with exposure to microwave radiation.
Microwave Radiation Damages Blood - A study at the Institute of Biochemistry and Biophysics, University of Tehran showed that microwave radiation alters the structure of blood hemoglobin (HbA) and reduces its ability to carry oxygen.
Cell Phones Cause Hearing Loss - A study conducted by hearing expert Dr. Naresh Pand shows that the microwave radiation from mobile phones causes hearing loss. Dr. Panda compared the hearing of 100 mobile phone users between the ages of 18 and 25 with that of 50 others who did not use mobile phones.
Microwave Radiation Causes Eye Damage - A study published in the journal Bioelectromagnetics showed that the microwave radiation from cell phones can cause cataracts and other eye damage by creating tiny air pockets in the lense of the eye.
Microwave Radiation Damages DNA - A four year study conducted by the European Union (EU) by 12 research groups in 7 European countries found that radiation from cell phones harm body cells and damages DNA. The damaged DNA was passed on to subsequent generations of cells, a condition for the formation of cancer.
"We know today that even one single exposition to a low dose of radiation from a mobile phone will bring about DNA damage in brain cells." Robert C Kane, former researcher at Motorola
Cell Phone Usage Causes Tumors - A team of researchers at Institute of Environmental Medicine at the Karolinska Institute in Stockholm, Sweden, found almost a fourfold increase of the tumors, known as acoustic neuromas, on the side of the head where the phone was most often held. A recent study sanctioned by the World Health Organization found an increased risk of brain tumors in people who have used the phones for 10 years or more.
Cell Phone Usage Disrupts Children's Brains - A study conducted by Dr. Michael Klieeisen at the Spanish Neuro Diagnostic Research Institute in Marbella found that two minutes of cell phone usage disrupted brain function in children for up to an hour after the exposure ended. The abnormal brain function could result in psychiatric and behavioural problems and impair learning ability.
Cell Phone Usage Cuts Male Fertility - Research results show that mobile phone usage reduces sperm count and damages surviving sperm. Dr. Imre Fejes of the obstetrics and gynaecology department at the University of Szeged in Hungary conducted the study and concludes: “The prolonged use of cell phones may have a negative effect on spermatogenesis (sperm production) and male fertility, that deteriorates both concentration and motility.” Dr. Fejes paper was released at the 20th Annual Meeting of the European Society of Human Reproduction and Embryology held in Berlin from 27 to 30 June 2004.
Cell Tower Radiation Shown to Cause Headaches and Nausea - Three Dutch ministries conducted a study that found that the radiation from the next generation cell phone towers can cause headaches and nausea. The study is the first of its kind and compared the impact of radiation from base stations used for the current mobile telephone network with that of cell towers for new third generation (3G) networks. The study used lower a dose of radiation than cell phones. Hand held phones emit stronger radiation when they are used, while cell towers transmit more constant levels of radio signals, continuously exposing everyone within range.
"If the test group was exposed to third generation base station signals there was a significant impact... They felt tingling sensations, got headaches and felt nauseous," a spokeswoman for the Dutch Economics Ministry said.
Micrwoave Radiation Causes Brain Damage - A study headed by Leif Salford, Department of Neurosurgery at Lund University in Sweden and published in Environmental Health Perspectives shows that cell phone use damages neurons in the brain. This study found that exposure to electromagnetic fields emitted by certain phones was associated with the leakage of labumin through the blood-brain barrier and neuronal damage that increased in response to the amount of exposure. The radiation typically experienced by a user of a cell phone actually burned holes in the brains of rats.
The Head Absorbs Radiation - Headaches, nausea, dizziness, short-term memory problems, fatigue, and other complaints resulting from cellular phone use are not due to low-level heating of the brain; instead, they're apparently caused by the head serving as an "antenna" and brain tissue as a radio receiver, according to two Jerusalem researchers. Zvi Weinberger, a physicist who heads the applied physics department at the Jerusalem College of Technology, and Dr. Elihu Richter, head of the occupational medicine unit at the Hebrew University-Hadassah Braun School of Public Health, suggested this in the latest issue of the journal Medical Hypotheses. Mobile phones, they explained, "broadcast specifically at frequencies at which the head serves as an antenna and brain tissue serves as a demodulating radio receiver." Thus, precaution must be taken in the use of cellphones, they wrote. Jeruselem Post 12/02/02
Mobile Phone Signals Affect Brain Activity - A study reported in theJournal of Sleep Research (Blackwell Publishing) found that 30 minutes exposure to electromagnetic fields, as from GSM mobile phones, caused changes to brain activity which lasted long afterwards. Dr Peter Achermann and colleagues from the University of Zurich, and ITIS, in Zurich, found that blood flow increased in areas of the brain on the side nearest the phone, and that this effect lasted for over half an hour afterwards. They also discovered that the brain’s electrical activity (‘brain waves’) was not only affected immediately after the exposure, but that this lasted through much of the subsequent night’s sleep.
Radiation From Cell Phones Can Make Cancer Grow Faster - "Italian scientists have raised new health concerns about the safety of using mobile phones, with research showing radio waves from the handsets makes cancerous cells grow more aggressively.." Reuters, 10/23/02
Cell Phone Radiation Can Cause Brain Tumors - An epidemiology study conducted by Dr. Lennart Hardell found a higher incidence of brain tumors on the sides of heads used by mobile-phone subscribers to make and receive calls. The study was published in the August, 2002 issue of the European Journal of Cancer Prevention.
Cell Phones Incease Blood Pressure - The June 1998 The Lancet reported that radiation from mobiles caused an increase of blood pressure. Dr Braune and colleagues in Freiburg, Germany, attached mobiles to the right side of the heads of ten volunteers. The phones were switched on and off by remote control without the volunteers knowing - so that any radiation effect could be separated from the psychological effect of holding a mobile phone. Their blood pressure rose each time by between 5-10mm Hg which is enough to cause a stroke in those at risk for one.
The body of evidence showing the hazards of cell phones is more than sufficient to cause alarm, yet, public health organizations continue to stall while the cell phone industry builds more towers and makes billions selling more phones. Just as the tobacco industry was able to hold back the truth regarding the health effects of smoking, the cell phone industry has suppresed the truth about cell phone hazards. If you care about your health and the health of your family, please take the time to educate yourself and have the courage to act on what you find.
Wi-Fi Lies
Wide area wireless Internet networks (Wi-Fi) are spreading rapidly and are now in many homes, cities, hotels, airports, schools, restaurants and other public places. Industry claims that the radiation from wireless networks is a fraction of that from cell phones, yet a 2007 BBC documentary showed that the radiation level in schools was up to three times higher than that from the main beam of a cell phone tower.
One of the biggest problems with wireless networks is the continual exposure. With a cell phone the exposure is limited to the time that the phone is switched on and transmitting. With wireless networks the exposure is 24/7.
Some schools in Europe are now removing wireless networks and replacing them with conventional wired networks due to the fact that teachers and students were experiencing neurological problems linked to microwave radiation.
What to Do About it
It is not easy for many of us to simply stop using a cell phone. There may be a significant financial cost related to not being able to communicate via a cell phone. For those who travel it is getting increasingly difficult to find a pay-phone anywhere.However, the risks are very real and very serious and one's health is certainly worth protecting. The cost of using a cell phone is likely much higher in the long-term than the cost of not using one.
Humans have lived and done business for thousands of years without mobile phones. 20 years ago few people had cell phones and 10 years ago there were almost no wireless networks. We all did just fine without them then and can do fine without them now.
Reduce your risk:
Simply don't use a cell phone, wireless network or live near a cell phone tower. Don't stand close to someone who is using a cell phone.
If you must use a cell phone use it only in places with a strong signal. This allows the phone to transmit at low power (up to 100 times lower than its maximum value), reducing exposure accordingly.
Minimize the length of calls.
If you know where the nearest cell phone tower is don't put yourself between it and your phone, otherwise the signal travels straight through your head.
Extend the antenna and hold the phone away from the head when possible.
In your car use a hands-free kit with an external antenna and keep the phone away from your body. The external antenna should be as far away from you as possible.
Do not use an earphone if it is made of conductive wire. Studies have shown that a metal earphone wire can act as an antenna and direct radiation into the head from the ear canal. Some earphones now use fiber optic cable or a hollow tube to convey sound.
Don't stay in hotels with wireless networks or patronize other businesses with wireless networks.
Express your concerns to your employer, landlord, your family and everyone else you know. Give them the facts so that they can make informed decisions.
Mobile Phones - Some news reports mention that a research institute in Europe conducted a research on the use of mobile phones.
They have found that excessive use of mobile phones causes infertility in men and women .Another news report suggests that a very sexually active man using a high technology high powered mobile instrument of a top of the line mobile phone brand and keeping it in the trouser pocket has lost his sperm count to zero. There have been conflicting reports ever since the introduction of the mobile phones in the world. The Public Relations Media agencies of the mobile phone companies have been constantly criticizing any kind of research against them in any part of the world. The mobile phone companies and the service providers are huge global multinational giants. They can afford to call any research against them as trash because of their money and media power. Watch out for yourself and at least take precautions not to keep the mobile phones in the pockets near the heart and trouser pockets.
The sex organs and the heart are very sensitive areas. Try using it lesser as the brain is also very sensitive . Preferably use the loud speaker of the mobile phone for excessive use.
All the multinational giants producing these products are not going to bother becaus of their huge investments in the global business of Mobile telephony .
You have to take precautions your self . So be very careful using these hitech toys as these are the necessaties of our modern times for lightening speed communications
داء السمنة يتفشى في الدول المتقدمة.. والفقراء الأكثر بدانة
باريس - د. ب. أ
حذرت منظمة التعاون الاقتصادي والتنمية أمس من أن السمنة في طريقها لأن تصبح المشكلة الصحية الأكثر شيوعا في الدول الصناعية، ودعت الحكومات إلى إطلاق حملة شاملة لمعالجة المشكلة. وقالت المنظمة التي تضم 30 دولة متقدمة في تقرير أصدرته أمس الخميس في باريس، إنه منذ ثمانينيات القرن الماضي ارتفع عدد المصابين بالسمنة في الدول الأعضاء في المنظمة من عشر السكان، بما يعادل الضعفين أو حتى ثلاثة أضعاف. واشارت في دراسة بعنوان "السمنة واقتصادات المنع" الى انه "إذا استمرت الاتجاهات الراهنة .. فإن المؤشرات تشير إلى أن أكثر من ثلثي الأشخاص سيعانون من زيادة الوزن أو سيصابون بالسمنة في عدد من دول منظمة التعاون الاقتصادي والتنمية على الأقل في غضون السنوات العشر المقبلة".
وأشارت الدراسة الى أن الأسباب تعود الى التغيرات في إنتاج الغذاء التي "قلصت أسعار المواد المحتوية على سعرات حرارية .. بشكل كبير وتغير ظروف الحياة والعمل التي قلصت كمية النشاط البدني وارتفاع معدلات التوتر والعمل لساعات أطول. وأشارت المنظمة إلى أن السمنة أكثر شيوعا في أوساط الفقراء ومن ينالون قدرا أقل من التعليم، وأن المشكلة تتبدى بشكل حاد في أكثر دول العالم رفاهية، الولايات المتحدة، حيث إن ثلاث سيدات من بين كل أربع يعانين من البدانة.
تحذير من تحول السيلان مرضاً غير قابل للعلاج:إن الاستخدام غير الصحيح للمضادات الحيوية تسبب في اكتساب العدوى مقاومة واسعة النطاق،
01 ايار, 2010
تحذير من تحول السيلان مرضاً غير قابل للعلاج
مانيلا - (د ب أ)
حذرت منظمة الصحة العالمية امس الخميس من أنه من المحتمل أن يصبح مرض السيلان غير قابل للعلاج قريبا إذا لم يجر ابتكار وسائل جديدة للعلاج ومنع انتقال العدوى بهذا المرض الجنسي.
وقالت المنظمة إن الاستخدام غير الصحيح للمضادات الحيوية تسبب في اكتساب العدوى مقاومة واسعة النطاق، بينما أخذت المضادات الحيوية الأقل سعرا والمستخدمة في الخط الأول للعلاج تفقد فعاليتها. وحذرت المنظمة قائلة إنه "إذا استمر ذلك، فستكون مسألة وقت فقط لتطور العدوى مقاومتها للجيل الثالث من المضادات الحيوية". وأفادت بأن استراليا وهونغ كونغ واليابان سجلت بالفعل حالات فشل لعلاج السيلان بعقار سيفالوسبورين عن طريق الفم، والذي يستخدم حاليا في الخط الأخير لعلاج المرض.
وقال الدكتور شين يونج-سو، المدير الإقليمي بالمنظمة لمنطقة غرب المحيط الهادي، إنه سيكون هناك انعكاسات خطيرة على الصحة العامة إذا أصبح السيلان غير قابل للعلاج.
نتثاءب عندما نشعر بالتعب أو عندما نشعر بالملل أو عندما نشعر بالجوع وشوهد مظليون يتثاءبون قبل القفز بالمظلة ويشير بحث علمي إلى وجود علاقة بين التثاؤب والاثارة الجنسية.
لكن الأسباب الحقيقية والوظيفة الدقيقة للتثاؤب ما زالت لغزا ومن المدهش أنه ظل حتى عهد قريب من الموضوعات التي لم تلق التوثيق الكافي في عالم العلم.
والآن نشر الطبيب الفرنسي اوليفييه فالوسينسكي ما يوصف بأنه أول مرجع علمي في هذا الموضوع وعنوانه "لغز التثاؤب في وظائف الاعضاء والمرض" وهو مجموعة من أحدث الأبحاث في هذا السلوك المحير وغير الإرادي.
وفي أعقاب نشر الكتاب يعقد في 24 و25 يونيو حزيران المؤتمر الدولي الأول بشأن التثاؤب في باريس وسيتصدى لموضوعات مثل دور التثاؤب كآلية لتبريد الدماغ والطابع الجنسي الخفي للتثاؤب.
وقال فالوسينسكي لرويترز "هناك عدد من النظريات لكن لا يوجد دليل رسمي حتى الآن على السبب الذي يجعلنا نتثاءب."
والمعروف ان الإنسان العادي يتثاءب حوالي 250 ألف مرة على مدار حياته وأن الأجنة تتثاءب في الرحم بدءا من عمر 12 إلى 14 اسبوعا مما يرجح أن التثاؤب يؤدي وظيفة عصبية مهمة.
وقال فالوسينسكي "إذا كان بإمكان الجنين الذي لا يتجاوز وزنه 60 جراما أن ينفق مقدار الطاقة المطلوب للتثاؤب والتمطي فلا بد أنهما ضروريان ضرورة مطلقة لنموه."
وتتثاءب الطيور والأسماك وكل الفقاريات ذات الدم البارد والحار باستثناء الزرافة والحوت اللذين لم يشاهدا وهما يتثاءبان حتى الان. ومازال من المعتقد على نطاق واسع أن التثاؤب عند البشر يزيد من مستويات الأكسجين في الدم ويخلص الجسم من ثاني اوكسيد الكربون الزائد رغم ان هذه النظرية استبعدت منذ الثمانينيات.
وقال فالوسينسكي "هذه الفكرة ترجع إلى القرن السابع عشر لكن الدراسات التي أجراها الأمريكي روبرت بروفين... أظهرت أن تركيزات الغازات في الدم ظلت كما هي بالضبط قبل التثاؤب وبعده."
وبدلا من ذلك استند بحث حديث إلى تثاؤبنا عندما نشعر بالرغبة في النعاس أو عندما نشعر بالملل مقترحا أننا نتثاءب لزيادة اليقظة.
ويعتقد أن التثاؤب عند الجوع يؤيد هذه النظرية برغم أن الإنسان خلافا للأسد وغيره من الحيوانات اللاحمة لم يعد يحتاج إلى شحذ غرائزه ليصيد فريسته.
أما بالنسبة للمظليين الذين يتثاءبون قبل القفز بمظلاتهم فربما كان ذلك أيضا لزيادة اليقظة إلا ان هناك أيضا تكهنات بأن التثاؤب يساعد في التصدي للتوتر.
ولوحظ ان الفئران التي اخضعت لعوامل مسببة للتوتر في أقفاص تتثاءب بوتيرة أعلى ومع ذلك فلا تعرف الوظيفة التي يؤديها التثاؤب لتلك الحيوانات.
ومن بين النظريات الاخرى ان التثاؤب يساعد على تبريد الدماغ لكن هذه النظرية لا تجيب على اسئلة مثل سبب عدم زيادة التثاؤب عند الاصابة بالحمى ولماذا تتثاءب الثعابين وأجسامها تخلو من آلية لتنظيم درجة الحرارة.
واشار باحث هولندي إلى احتمال وجود صلة بين التثاؤب والسلوك الجنسي عند البشر استنادا الى أدلة ظرفية مثل حالات ورود التثاؤب في الأدب وفي الفنون البصرية.
أما في الحيوانات فيقول فالوسينسكي ان الرابطة أوضح.
واضاف "عند قرود المكاك يتثاءب الذكر المهيمن قبل وبعد المسافدة وهذا أمر يعتمد على هرمون التستوستيرون."
فضيحة علمية تكشفها صحيفة بريطانية:Glacier scientist: I knew data hadn't been verified
01 شباط, 2010
فضيحة علمية تكشفها صحيفة بريطانية
خبراء تقويم المناخ اعتمدوا على دراسات طلابية في تحذيراتهم من ذوبان ثلوج أعالي الجبال
لندن - أ. ف. ب.
أعلنت صحيفة بريطانية أمس الأحد أن المجموعة الحكومية للخبراء حول
تقويم المناخ التابعة للأمم المتحدة اعتمدت في تحذيراتها من ذوبان الكتل
الجليدية على قمم المرتفعات على دراسات طلابية ومقال في مجلة مختصة بتسلق
الجبال.
وشكلت هذه التحذيرات احراجا للهيئة التي اضطرت للاعتذار هذا الشهر عن توقعات غير دقيقة حول كتل الجليد في الهيمالايا.
وكانت الهيئة افادت في تقرير لها انها لاحظت تراجعا في الكتل الجليدية
في جبال الانديز والألب ومرتفعات افريقيا بسبب الاحترار، مستشهدة بمستندين
كمصدر معلومات. الا ان صحيفة "صنداي تلغراف" اشارت الى ان احد المقالين
استند الى مجلة لهواة تسلق الجبال يطرح المشاكل التي واجهها المتسلقون
مؤخرا باسلوب تهكمي.
واضافت الصحيفة ان المستند الثاني كان اطروحة لطالب يدرس الجغرافيا في
جامعة برن في سويسرا تعتمد على مقابلات اجراها مع مرشدين في جبال الألب.
وكانت الهيئة اعتبرت تقريرا نشرته صحيفة "صنداي تايمز" هذا الشهر
"مضللا وعار من الصحة"، بعدما شكك في صحة الادلة التي قدمتها الهيئة على
ارتباط الاحترار بتفاقم الكوارث الطبيعية.
اما العلماء فقد دافعوا عن الهيئة بما أنها اعترفت بخطئها حول جبال الهيمالايا واصروا على ان عملها متوازن واستنتاجاتها سليمة.
Glacier scientist: I knew data hadn't been verified
By
David Rose
Last updated at 12:54 AM on 24th January 2010
The scientist behind the bogus claim in a Nobel Prize-winning UN
report that Himalayan glaciers will have melted by 2035 last night
admitted it was included purely to put political pressure on world
leaders.
Dr Murari Lal also said he was well aware the statement,
in the 2007 report by the Intergovernmental Panel on Climate Change
(IPCC), did not rest on peer-reviewed scientific research.
In an
interview with The Mail on Sunday, Dr Lal, the co-ordinating lead
author of the report’s chapter on Asia, said: ‘It related to several
countries in this region and their water sources. We thought that if we
can highlight it, it will impact policy-makers and politicians and
encourage them to take some concrete action.
‘It had importance for the region, so we thought we should put it in.’
Chilling error: The Intergovernmental Panel on Climate Change wrongly asserted that glaciers in the Himalayas would melt by 2035
Dr Lal’s admission will only add to the mounting furore over the
melting glaciers assertion, which the IPCC was last week forced to
withdraw because it has no scientific foundation.
According to
the IPCC’s statement of principles, its role is ‘to assess on a
comprehensive, objective, open and transparent basis, scientific,
technical and socio-economic information – IPCC reports should be
neutral with respect to policy’.
The claim that Himalayan
glaciers are set to disappear by 2035 rests on two 1999 magazine
interviews with glaciologist Syed Hasnain, which were then recycled
without any further investigation in a 2005 report by the environmental
campaign group WWF.
It was this report that Dr Lal and his team cited as their source.
The
WWF article also contained a basic error in its arithmetic. A claim
that one glacier was retreating at the alarming rate of 134 metres a
year should in fact have said 23 metres – the authors had divided the
total loss measured over 121 years by 21, not 121.
Last Friday,
the WWF website posted a humiliating statement recognising the claim as
‘unsound’, and saying it ‘regrets any confusion caused’.
Dr Lal
said: ‘We knew the WWF report with the 2035 date was “grey literature”
[material not published in a peer-reviewed journal]. But it was never
picked up by any of the authors in our working group, nor by any of the
more than 500 external reviewers, by the governments to which it was
sent, or by the final IPCC review editors.’
In fact, the 2035 melting date seems to have been plucked from thin air.
Professor
Graham Cogley, a glacier expert at Trent University in Canada, who
began to raise doubts in scientific circles last year, said the claim
multiplies the rate at which glaciers have been seen to melt by a
factor of about 25.
‘My educated guess is that there will be somewhat less ice in 2035 than there is now,’ he said.
Forced to apologise: Chairman of the IPCC Raj Pachauri
‘But there is no way the glaciers will be close to disappearing. It
doesn’t seem to me that exaggerating the problem’s seriousness is going
to help solve it.’
One of the problems bedevilling Himalayan
glacier research is a lack of reliable data. But an authoritative
report published last November by the Indian government said:
‘Himalayan glaciers have not in any way exhibited, especially in recent
years, an abnormal annual retreat.’
When this report was issued, Raj Pachauri, the IPCC chairman, denounced it as ‘voodoo science’.
Having
been forced to apologise over the 2035 claim, Dr Pachauri blamed Dr
Lal, saying his team had failed to apply IPCC procedures.
It
was an accusation rebutted angrily by Dr Lal. ‘We as authors followed
them to the letter,’ he said. ‘Had we received information that
undermined the claim, we would have included it.’
However, an
analysis of those 500-plus formal review comments, to be published
tomorrow by the Global Warming Policy Foundation (GWPF), the new body
founded by former Chancellor Nigel Lawson, suggests that when reviewers
did raise issues that called the claim into question, Dr Lal and his
colleagues simply ignored them.
For example, Hayley Fowler of
Newcastle University, suggested that their draft did not mention that
Himalayan glaciers in the Karakoram range are growing rapidly, citing a
paper published in the influential journal Nature.
In their
response, the IPCC authors said, bizarrely, that they were ‘unable to
get hold of the suggested references’, but would ‘consider’ this in
their final version. They failed to do so.
The Japanese
government commented that the draft did not clarify what it meant by
stating that the likelihood of the glaciers disappearing by 2035 was
‘very high’. ‘What is the confidence level?’ it asked.
The authors’ response said ‘appropriate revisions and editing made’. But the final version was identical to their draft.
Last
week, Professor Georg Kaser, a glacier expert from Austria, who was
lead author of a different chapter in the IPCC report, said when he
became aware of the 2035 claim a few months before the report was
published, he wrote to Dr Lal, urging him to withdraw it as patently
untrue.
Dr Lal claimed he never received this letter. ‘He didn’t contact me or any of the other authors of the chapter,’ he said.
The
damage to the IPCC’s reputation, already tarnished by last year’s
‘Warmergate’ leaked email scandal, is likely to be considerable.
Benny
Peiser, the GWPF’s director, said the affair suggested the IPCC review
process was ‘skewed by a bias towards alarmist assessments’.
Environmentalist
Alton Byers said the panel’s credibility had been damaged. ‘They’ve
done sloppy work,’ he said. ‘We need better research on the ground, not
unreliable predictions derived from computer models.’
Last night,
Dr Pachauri defended the IPCC, saying it was wrong to generalise based
on a single mistake. ‘Our procedure is robust,’ he added.
غراء Glue Mussel مستوحى من بلح البحر يسهم في علاج عيوب الغشاء المحيط بالأجنة :Mussel Inspired Surgical Glue Showing Promise in Trials
25 كانون ثاني, 2010
غراء مستوحى من بلح البحر يسهم في علاج عيوب الغشاء المحيط بالأجنة
إيفانستون-ي ب ا
ألهم بلح البحر (Glue Mussel) وهو من الرخويات التي تلتصق عادة بالصخور العلماء لتطوير لاصق مانع للتسرب يساعد في علاج العيوب التي تصيب الغشاء النسيجي المحيط بالجنين البشري.
وقال مهندس البيولوجيا الطبية في جامعة "نورسويسترن" بولاية إيلينوي الأميركية فيليب ميسيرسميث ان اللاصق المانع للتسرب اختبر على نسيج جنيني حي في تجارب على الحيوانات وتبين انه "متلائم بيولوجياً وفعال في سد الثغرات الصغيرة، وهما ميزتان أساسيتان في هذه المادة". يشار إلى ان العيوب في الأنسجة الجنينية تنتج عن الجروح أو الشقوق خلال الجراحات بالمنظار، أو تكون عيوباً خلقية أو شيئاً طارئاً. وكتب ميسيرسميث في المجلة الأميركية لطب الولادة وعلم الجينات ان المواد المتلائمة بيولوجياً تعتبر ضرورية في علاج العيوب التي لا تصلح نفسها بشكل تلقائي. ووجد ميسيرسميث وزملاؤه من كندا وسويسرا وبلجيكا ان الغراء المستوحى من بلح البحر كانت أقل سميةً وتتميز بقدرة أفضل على التمازج بالغشاء من أنواع الغراء الطبية المستخدمة. يشار إلى ان مفتاح اللاصق هو عائلة من بروتينات لاصقة فريدة لدى بلح البحر وتتميز بالكميات المرتفعة من الحمض الأميني ومادة "الديهايدروكسيفنيلالانين".
Northwestern University researchers have developed a surgical glue based on the adhesive that mussels use to stick themselves to rocks. Now an international team of scientists has tested the effectiveness of the glue in repairing damage in the human fetal membrane, a wet and fragile tissue, resulting in performance and toxicity improvements over common surgical glues.
Messersmith [Phillip Messersmith, professor of biomedical engineering at Northwestern University --ed.] and colleagues from Belgium, Switzerland, and Canada punched holes three millimeters wide into human fetal tissue in vitro to replicate the tiny holes found in fetal membrane defects.
They then applied their sealant as well as other sealant candidates (such as medical-grade superglues) to the holes and analyzed fetal tissue cell death for each sealant. The mussel-inspired sealant had the best results in both bonding and toxicity.
The injectable sealant is a mixture of two different solutions that, when combined, form a sealant or gel in 10 to 20 seconds.
One solution is a simple synthetic polymer containing DOPA, a key amino acid found in the sophisticated proteins that are essential to mussels' ability to adhere to wet surfaces, and the other is a catalyst.
The foot of the common mussel (Mytilus edulis) produces a sticky glue that keeps the shelled organism anchored to rocks and other objects, allowing them to withstand the extreme pounding of waves. Chemical analysis of this natural, waterproof glue showed that the key to its adhesiveness is a family of unique proteins called mussel adhesive proteins, which contain a high concentration of DOPA (dihydroxyphenylalanine).
شاب سعودي يستغل « الإعلام الجديد» ويقدم دروساً في اليوتيوب
29 كانون اول, 2009
شاب سعودي يستغل « الإعلام الجديد» ويقدم دروساً في اليوتيوب
لقطة من قناة عبدالرحمن العمار على اليوتيوب
الرياض- مشعل العنزي
يمثل موقع اليوتيوب حالياً نوعاً من "الإعلام الجديد" الذي فتح المجال للهواة لكي يمارسوا من خلاله مواهبهم الفنية والإعلامية بعيداً عن وصاية القنوات الفضائية وشروطها التي لا تلقي بالاً للموهبة والإبداع, وشهدت السنتين الماضيتين تأسيس الكثير من القنوات في موقع اليوتيوب يُديرها شباب سعوديون يمتلكون مواهب متعددة في صناعة الأفلام ومقاطع الفيديو, وأصبحت هذه القنوات أشبه بالقنوات التلفزيونية من حيث حجم المتابعة, وأصبح لها جمهور كبير من متصفحي الإنترنت. الشاب عبدالرحمن العمار أحد مؤسسي هذه القنوات الخاصة ويقدم فيها مقاطع فيديو من تصميمه لتعليم اللغة الإنجليزية.. وقد التقت به "الرياض" في هذا الحوار:
* متى أسست قناتك؟. وما هي نوعية الأفلام التي تقدمها عبرها؟.
أسستها قبل سنتين تقريباً. والأفلام التي أقدمها هي عبارة عن دروس في اللغة الإنجليزية كما أقوم بإنتاج أفلام قصيرة وكذلك أفلام وثائقية. لعل من أبرزها فيلم (بالمحبة نستمر) لأن الإقبال عليه كان كبيراً جداً إذ حصد خلال شهر واحد أكثر من عشرين ألف زيارة. وكل ما أقوم به هو محاولة استثمار التطور التقني بشكل إيجابي في ما يخدم المجتمع.
قناته على اليوتيوب
* هل كان الإقبال كبيراً منذ البداية؟
لا.. كانت البداية ضعيفة جداً، ولكن بفضل الله الآن عدد المشاهدين كبير جدا والعدد يتصاعد كل يوم بمعدل ألف زائر تقريباً لمجمل المقاطع.
* وكيف تسوق لقناتك؟
عبر المنتديات والبلوتوث ورسائل الإيميل.
* كيف تتعامل مع تعليقات الجمهور على أفلامك؟.
هذا سؤال مهم للغاية ومن خلال التعليقات لاحظت أن الجمهور معجب بالقناة وذلك لانها تقدم شيئاً جديداً في الساحة وغير مقلد أو مقتبس وأيضاً استخدمت الروح الفكاهية.
* كم عدد الأفلام والمقاطع التي صنعتها حتى الآن؟
أكثر من 25 فيلماً.
* بماذا تنصح من يريد دخول مجال "الإعلام الجديد"؟
أولاً لابد له أن يضع لنفسه ولأفلامه شخصية مستقلة تمنحه التميز بين القنوات المنافسة. ثم لابد أن يكون لديه إلمام بتقنية صناعة مقاطع الفيديو وبالبرامج المهمة مثل ( adobe , magix, Ulead , Sony Vegas ) لأنه عندما يقدم مادته بمونتاج عادي قد يجد قبولاً ولكنه ضعيف حتى لو كانت الفكرة جيدة أما إذا كان المونتاج رائعاً ومتقناً والإخراج مدهشاً فسيكون الإقبال عليه قوياً وسيعجب به المشاهدون حتى لو كان المضمون عادياً
نوع جديد من الصراصير يفضح الغش في الأغذية .. بمتاجر نيويورك: New Yorkers beware! New cockroach hits the Big Apple
25 كانون اول, 2009
نوع جديد من الصراصير يفضح الغش في الأغذية .. بمتاجر نيويورك
نيويورك - أ. ف. ب:
أظهرت دراسة لجامعة روكفلر المتخصصة في البحث الطبي والبيولوجي ان صرصارا جديدا ظهر في نيويورك.
وتحت اشراف الاستاذ الجامعي مارك ستوكلي الاخصائي في علم الجينات في الجامعة قام تلميذان من مدرسة ثانوية بمهام "التحري" في شوارع نيويورك وفي شقتيهما وجمعا 217 عينة مختلفة بين تشرين الثاني/نوفمبر 2008 واذار/مارس 2009.
وشملت هذ العينات اغذية من السوبر ماركت وبقايا حشرة في عبوة اناناس معلبة وبراز يابسا وصرصارا وارسلت جميعها الى متحف التاريخ الطبيعي في نيويورك الذي وافق على المشاركة في البحث وقام بتحاليل حمض دي ان ايه.
وتمكن المتحف تاليا من تحديد نوع جديد من الصراصير "يختلف دي ان ايه لديها بنسبة 4 % عن "الصرصار الاميركي" في حين ان الاختلاف الجيني بين حشرات من الفئة ذاتها لا يتجاوز 1 %" على ما اوضح ستوكلي لوكالة فرانس برس.
واضاف "يمكننا اذاً ان نقول انه نوع جديد من الصراصير على الارجح" مشيرا الى ان "هذا الاكتشاف قد يهم متاحف التاريخ الطبيعي"... وسكان نيويورك.
والى جانب الصرصار الجديد حدد مختبر المتحف 95 نوعا حيوانيا مختلفا واستنتج الباحثون ان بالامكان التعرف الى الدي ان ايه حتى بعد ان تطبخ الاغذية او تيبس وحتى لو توافرت منها كميات صغيرة جدا.
واعتبر الباحثون ان الاكتشاف الاهم هو ان "16 % من المنتجات الغذائية في المتاجر تحمل معلومات غير واضحة مما قد يشكل خطرا كبيرا خصوصا في حال كان المرء يعاني من الحساسية".
واكتشف الباحثون ان جبنة ماعز كانت تحتوي في الواقع على حليب بقر وان علبة كتب عليها "كافيار من سمك الحفش" كانت تحمل السمات الجينية لنوع من "سمك الحبار".
New Yorkers beware! New cockroach hits the Big Apple
(
AFP) – 2 days ago
NEW YORK — New Yorkers are used to fighting each other for space, but there may be a new contender in town according to a Rockefeller study that appears to have uncovered a new species of cockroach.
"The cockroach is genetically modified. Species don't differ more than one percent, this cockroach is four percent different, which suggests it is a new species of cockroach," Professor Mark Stoeckle, an expert on genomics and DNA barcoding at Rockefeller University, told AFP.
"We think that the museums of natural history in Paris or New York could be interested."
The previously-unidentified creepy-crawly was uncovered as part of a project undertaken by two high-school students, Brenda Tan, 17, and Matt Cost, 18, under Stoeckle's supervision.
In their roles as "DNAHouse investigators," the pair trawled New York apartments, stores and street, collecting 217 specimens between November 2008 and March 2009.
They took samples from supermarket food, the remains of an insect found in a box of fruit, a feather from a duster, dried dung and a cockroach and matched DNA sequences using the Barcode of Life Database and GenBank.
The American Museum of Natural History laboratory identified 170 genetic codes, leading the researchers to identify 95 different animal species, including some that were unexpected.
"A feather from a duster yielded ostrich DNA. A delicacy labeled 'sturgeon caviar' instead turned out to be from the strange-looking paddlefish. A popular Asian snack was revealed as giant flying squid. Bison DNA was found in a dog biscuit," the pair wrote on the Rockefeller University website.
In fact, they found that 16 percent of food items were mislabeled, including cheeses labeled sheep's milk that were actually made of cow's milk, a potentially dangerous labelling error for those with allergies.
But perhaps the biggest surprise for the researchers was the discovery of "a genetically distinct 'mystery' cockroach that might be a new species."
"By appearance it looks like the American cockroach (Periplaneta americana) but it is genetically different from other American cockroaches in the databases," the researchers said
نشر المرصد الأوروبي الجنوبي هذه الصورة التي التقطها المسبار فيستا لتوهج سديمي من الغاز والغبار يسبق نشوء نجمة في وسط مجموعة الجبار (والمعروفة أيضاً باسم الجوزاء). (أ.ب)
إنتاج اللحم في المختبرات من أنسجة عضلية: Meat grown in laboratory in world first
01 كانون اول, 2009
إنتاج اللحم في المختبرات من أنسجة عضلية
لندن(ي ب أ ) -
من الآن فصاعداً بات بالإمكان إنتاج اللحوم في المختبرات، والحد من عذاب الحيوانات.ونقلت صحيفة "صنداي تايمز" عن مارك بوست من جامعة أيندهوفن في هولندا إنه تمكن مع زملائه من إنتاج لحم الخنزير في المختبر، وهم يسعون إلى تطويره ليلقى قبولاً لدى المستهلكين.
وقال بوست "ما لدينا الآن هو فضلات أنسجة عضلية"، لافتاً إلى العمل على إيجاد سبل لتحسين هذه اللحوم، كما أشار إلى أهمية هذا المنتج للبيئة إذ سيحد من العذاب الذي تتعرض له الحيوانات.
وأضاف إنه اذا كان طعم هذا المنتج مثل اللحم العادي، فإن الناس سيقبلون عليه.
وذكرت الصحيفة أن العلماء استخرجوا الخلايا من عضلات خنازير ومزجوها مع خليط من المنتجات الحيوانية، فتضاعفت الخلايا وخلقت أنسجة عضلية تحولت إلى ما يشبه قطع اللحم
Meat grown in laboratory in world first
Scientists have managed to grow a form of meat in a laboratory for the first time, according to reports.
Published: 9:10AM GMT 29 Nov 2009
Vegetarian groups say there was ?no ethical objection? if meat was not a piece of a dead animal.Photo: GETTY
Researchers in the Netherlands created what was described as soggy pork and are now investigating ways to improve the muscle tissue in the hope that people will one day want to eat it.
No one has yet tasted their produce, but it is believed the artificial meat could be on sale within five years.
Vegetarian groups welcomed the news, saying there was “no ethical objection” if meat was not a piece of a dead animal.
Mark Post, professor of physiology at Eindhoven University, told The Sunday Times: “What we have at the moment is rather like wasted muscle tissue. We need to find ways of improving it by training it and stretching it, but we will get there.
“This product will be good for the environment and will reduce animal suffering. If it feels and tastes like meat, people will buy it.
“You could take the meat from one animal and create the volume of meat previously provided by a million animals.”
The scientists extracted cells from the muscle of a live pig and then put them in a broth of other animal products. The cells then multiplied and created muscle tissue. They believe that it can be turned into something like steak if they can find a way to artificially "exercise" the muscle.
The project is backed by the Dutch government and a sausage maker and comes following the creation of artificial fish fillets from goldfish muscle cells.
Meat produced in a laboratory could reduce greenhouse gas emissions associated with real animals.
Meat and dairy consumption is predicted to double by 2050 and methane from livestock is said to currently produce about 18 per cent of the world’s greenhouse gases.
Animal rights group Peta said: “As far as we’re concerned, if meat is no longer a piece of a dead animal there’s no ethical objection.”
However the Vegetarian Society said: “The big question is how could you guarantee you were eating artificial flesh rather than flesh from an animal that had been slaughtered.
“It would be very difficult to label and identify in a way that people would trust.”
استمتع بأريج زهور الألب وأنت في منزلك: سماعة رأس تحاكي الحواس الخمس وتحول العالم الافتراضي إلى واقع: The headset that will mimic all five senses and make the virtual world as convincing as real life
21 تشرين ثاني, 2009
استمتع بأريج زهور الألب وأنت في منزلك
سماعة رأس تحاكي الحواس الخمس وتحول العالم الافتراضي إلى واقع
لندن خاص
تمكن علماء بريطانيون من تصميم "خوذة" حقيقة افتراضية من شأنها إعادة إنتاج المدركات البصرية والروائح والأصوات بل وحتى نكهات المذاق بمواقع نائية، ذلك أن تلك الخوذة التي تتخذ هيئة السماعة الرأسية تفضي إلى تمكين مستخدميها من معايشة تجارب شبيهة بالتجارب.
ويستطيع مستخدمو الخوذة المذكورة أن يستمتعوا بشذى الأزهار وأريج الورود في أحد المروج المخضرة بجبال الألب أو أن يشعروا بلفح الهجير من شمس الكاريبي وهي تسفع وجوههم.
ويقول العلماء إن بمقدور الجهاز كذلك تمكين مستخدميه من إزجاء التحية إلى أصدقائهم وأقربائهم على الطرف الآخر من كوكبنا الأرضي وكأنهم يعيشون معهم تحت سقف واحد.
وفوق هذا وذاك سيكون بوسع الطلاب معرفة سبل العيش والوقوف على أساليب الحياة منذ سحيق الآماد في مصر القديمة أو روما أو بلاد الإغريق، ففي ما مضى، لم يتمكن العلماء من استخدام تقنية الحقيقة الافتراضية أو الواقع الافتراضي إلا في مجال إعادة إنتاج الصوت والصورة، أما في يوم الناس هذا فإن فريقاً من الأكاديميين البريطانيين من جامعتي يورك وورويك يعكف على استحداث خوذة حقيقة افتراضية أطلقوا عليها مسمى "الغطاء الواقي الافتراضي" قائلين إنها تفضي إلى تحفيز الحواس بصورة مقنعة لدرجة أنهم خلعوا على التجربة وصف الواقع الافتراضي.
يشار إلى أن الطراز الأول لتلك القبعة يتصل لاسلكياً بجهاز حاسب آلي يغذي القبعة (سماعة الرأس) بمعلومات عن عالم افتراضي أو عن جزء آخر من العالم الحقيقي، وتحتوي القبعة على شاشة شديدة الوضوح وتتسم بدرجة عالية من التجدد والحيوية والحركة والديناميكية كما أنها تعرض صوراً داكنة بمقدار عشرة أضعاف أو ساطعة بمقدار ثلاثين ضعفاً إذا ما قورنت بما تعرضه الشاشات التلفزيونية التقليدية.
ومن خلال أنبوب موصل بعلبة مليئة بالمواد الكيميائية تنبعث روائح تحت منخري مرتدي القبعة فيما يمكن لأداة مماثلة أن ترسل النكهات إلى الفم مباشرةً مما يؤدي إلى إيجاد شعور مميز لدى مستخدم الخوذة.
أما الحرارة والرطوبة فيمكن تغييرهما باستخدام مروحة وسخان بينما تفضي مكبرات الصوت الموجودة في المنطقة المحيطة إلى إصدار الأصوات في تلك المنطقة.
وقد تحدث البروفسور ألن تشالميرز من جامعة وارويك قائلاً إن من المفترض أن تكون تلك السماعة جاهزة للطرح في السوق في غضون خمسة أعوام – معرباً عن اعتقاده أنه سيتم استخدامها في اجتماعات العمل التي تنعقد في مواقع نائية أو في المدارس لتمكين الطلاب من استدعاء أحداث التاريخ ومعايشتها أو من قبل العائلات التي ترغب في تذوق النكهات الخاصة بالأماكن الغريبة. ومن الوارد أيضاً أن تكون تلك السماعة الرأسية رائجة واسعة الانتشار شائعة الاستخدام في ألعاب الكمبيوتر ولا سيما الألعاب التي يمارسها المولعون بالألعاب الافتراضية.
وقد أردف الدكتور تشالميرز يقول في مناسبة نظمها مجلس أبحاث العلوم الفيزيائية والهندسية: "إن الفكرة لا تتمثل في تغيير الواقع وإنما في تكميله"، وأعرب عن اعتقاده بأنه سيكون من الممكن أيضاً أن يتم استكشاف الأجزاء الأخرى من العالم في الوقت الفعلي للاستكشاف. فعلى سبيل المثال، يمكن لجهاز موصل بسيارة أن يقوم بتسجيل المناظر والروائح والأصوات والحرارة فضلاً عن نقل الأحاسيس والانطباعات عبر الانترنت إلى غطاء واقٍ في الجزء الآخر من العالم.
أما البروفسور ديفيد هاوارد من جامعة يورك، فقد صرح بقوله: "من ناحية نموذجية ظلت مشاريع الواقع الافتراضي تركز على واحدة أو اثنتين من الحواس الخمسة – حيث جرت العادة على أن يتم التركيز على البصر والسمع، وفي حدود علمي لا توجد أي مجموعة بحث أخرى في أي مكان آخر في العالم تقوم بما نزمع القيام به."
حريُّ بالذكر أيضاً أنه يمكن استخدام السماعة في تدريب الجند في الجيش أو الشرطة أو الدفاع المدني أو منسوبي القطاع الطبي.
Revealed: The headset that will mimic all five senses and make the virtual world as convincing as real life
A virtual reality helmet that recreates the sights, smells, sounds and even tastes of far-flung destinations has been devised by British scientists.
The device will allow users a life-like experience of places such as Kenya's Masai Mara while sitting on their sofa.
They can also enjoy the smell of flowers in an Alpine meadow or feel the heat of the Caribbean sun on their face.
Scientists say the device will also enable users to greet friends and family on the other side of the world as though they were in the same room.
And students will even be able to find out what it was like to live in ancient Egypt, Rome or Greece.
Previously, scientists have only been able to use virtual reality technology to recreate sound and vision.
Now a team of British academics from York and Warwick universities are creating a virtual reality helmet they are calling the Virtual Cocoon.
They say it stimulates the senses so convincingly they have called the experience Real Virtuality.
The virtual reality helmet titillates all five body senses while viewers sit at home on their sofas
The prototype helmet connects wirelessly to a computer which feeds it information about a virtual world or another part of the real world.
It features a high-definition high dynamic screen - which produces pictures ten times darker, or 30 times brighter than conventional television.
A tube connected to a box of chemicals releases smells under the wearer's nose, while a similar device can spray flavours directly into the mouth and provide a texture sensation.
The heat and humidity can be changed using a fan and heater, while surround-sound speakers recreate ambient noise.
Professor Alan Chalmers, of Warwick University, said the headset should be ready within five years.
The headset is being worked on by scientists at a number of British universities
He believes it will be used in long-distance business meetings, in schools to allow students to revisit history, or by families wanting to get a taste of exotic destinations.
It is also likely to be popular among computer gamers, particularly those who enjoy virtual roleplay games such as Second Life.
'The idea is not to replace reality but to complement it,' Professor Chalmers said at an event organised by the Engineering and Physical Sciences Research Council.
He believes it will be possible too to explore other parts of the world in real time.
For example, a device attached to a car on safari could record the sights, smells, sounds and heat and transmit the sensations over the internet to a Virtual Cocoon on the other side of the world.
Professor David Howard of the University of York said: 'VR projects have typically only focused on one or two of the five senses - usually sight and hearing.
'We're not aware of any other research group anywhere else in the world doing what we plan to do.'
The helmet could also be used in training soldiers, police officers, medical staff or firemen.
Initial estimates suggest the helmet will cost around £1,500.
Imagine living in Ancient Greece or swimming across the barrier reef -- Virtual Reality was created primarily to let us experience such things.
To date, however, the technology hasn't been too successful in providing simulations that approximate reality -- stimulating only one or two of the five senses that should be involved in the experience. Scientists from the Universities of York and Warwick working on a project called "Towards Real Virtuality" are determined to make this a thing of the past.
With funding from Engineering and Physical Sciences Research Council (EPSRC), they are developing a 'gadget' called Virtual Cocoon that will provide a more powerful and realistic virtual experience by stimulating all of the five senses.
Shares project head Professor David Howard of the University of York,
"Virtual Reality projects have typically only focused on one or two of the five senses - usually sight and hearing. We're not aware of any other research group anywhere else in the world doing what we plan to do.
"Smell will be generated electronically via a new technique being pioneered by Alan Chalmers and his team at Warwick which will deliver a pre-determined smell recipe on-demand. Taste and smell are closely linked but we intend to provide a texture sensation relating to something being in the mouth. Tactile devices will provide touch."
It remains to be seen if the concept for the new Virtual Reality device could indeed be realized.
نظارة تترجم لك فوداعا لعائق اللغة: Language no barrier for Japanese translation specs
14 تشرين ثاني, 2009
اليابانيون يخترعون نظارة تقوم بدور المترجم
طوكيو (رويترز)
في أحدث صيحة في عالم النظارات ابتكرت شركة (ان.اي.سي) اليابانية لصناعة الكمبيوتر نظارات تقوم أيضا بدور المترجم.
وثبتت الشركة جهاز كمبيوتر شخصي بالغ الدقة في إطار النظارة ووحدة عرض بما يسمح لاثنين لا يعرفان لغة بعضهما البعض بالتحاور بشكل سلس. وبضغطة بسيطة على زر صغير يسجل الحديث ويرسل الى الخادم الذي يقوم بدوره بتحليله وترجمته. وبعدها يقوم الخادم بارسال الحديث مترجما الى المستخدم الذي يستطيع قراءته بلغته الأم من خلال وحدة عرض صغيرة. وعلى الرغم من ان هذه التكنولوجيا لا تزال في مراحل التطوير الا ان الشركة المنتجة تقول ان وحدة اسرع تلوح في الافق وان الهدف هو كسر حاجز اللغة. لكن الاختراع الجديد لن يكون رخيصا فثمنه حاليا يصل الى نحو 83 الف دولار لكنه سينخفض مع الوقت. وتقول الشركة انه اذا سار كل شيء على مايرام فسيكون بوسع السائح الاجنبي ان يقول لمضيفه بكل ثقة "أستطيع أن أرى ما تقول".
An employee from Japanesecomputer giant NEC displays the automatic translation system "Tele Scouter" at the company's high-tech exhibition in Tokyo on November 5. The firm says the device will allow users to communicate with people of different languages by using an imaging device to project almost real-time translations directly onto the user's retina. Photograph by: Yoshikazu Tsuno, AFP TOKYO – Most eyewear improves vision or cuts through solar glare, but a new gadget from Japan may soon
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Language no barrier for Japanese translation specs
TOKYO (Reuters Life!) - It's the latest in eyewear for the linguistically challenged: Japanese computer-maker NEC has created a pair of glasses that double as a translator.
The Tele Scouter integrates spectacle frames with a personal mini-computer and a head-mounted display unit, allowing two or more people with no language in common to hold a conversation.
Conversations are, with the press of a button, recorded and sent to a remote server where they are analyzed and translated.
The server then sends the translation to the receiving user who can read the words in their own language on the display unit.
While the technology is still in its developmental stages, NEC says a faster unit is on the horizon and that the aim is to break down language barriers.
"With this you don't have to think about having to translate your own words," said NEC manager Kotaro Nagahama.
"All you have to do is speak and you don't have to do any thinking. You just use your own language," he told Reuters.
But Tele Scouter will not be cheap. When it reaches the market it will sell for around $83,000 although the price will come down over time.
If all goes according to plan, NEC says foreign tourists will one day, with great confidence be able to tell their hosts "I see what you're saying."
قال خبراء لياقة بدنية أميركيون إن صعود وهبوط درجات السلالم له فوائد صحية متعددة مثل تحسين التوازن وزيادة القوة.
ويؤدي استخدام معدات رياضية مثل جهاز المشي الثابت في المنازل والأندية الرياضية وكذلك صعود وهبوط السلالم إلى زيادة قوة العضلات واللياقة البدنية وتحسين توازن الجسم ومستويات الكوليسترول في الدم وإطالة العمر بحسب هؤلاء الخبراء.
وقال هؤلاء إن الذين يصعدون أكثر من 55 درجة سلم في الأسبوع يعيشون لفترة أطول.
والنصيحة التي يقدمها هؤلاء إلى الراغبين بزيادة قوتهم وتحسين توازنهم هي: صعود درجتي سلم في المرة الواحدة، والضغط على الجزء الخلفي من الساقين عند الصعود أو الهبوط من أجل زيادة قوة أوتار الركبة.
وبينت دراسة أن هبوط درجات السلم أو الهبوط من المنحدرات يحسن مستوى السكر في الدم وكذلك مستويات الكوليسترول، وبأن صعود السلالم قد يزيد الضغط على الركبتين والمفاصل ويتسبب بأوجاع في الركبتين والكاحلين ولذا يجب الاعتدال في ذلك، وبأنه من الأفضل أن يكون للسلام درابزين كي يحمي المرء من الانزلاق أو السقوط.
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