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Tag: "vitamin" at biology news

Discovery in orange cauliflower may lead to more nutritious crops

...color and is a precursor to the essential nutrient vitamin A. While cauliflower and many staple crops have th... the compound. Developing staple crops with more vitamin A is important because vitamin A deficiency, common in developing countries, leads to compromised im...

Simulations unravel outer membrane transport mechanism

... Science. Transporting large molecules, such as vitamin B12, citric acid or other vital nutrients across t... that would open up enough space for a molecule of vitamin B12 to pass through the barrel. (Click on the link below the image of the system to watch the result...

Researchers develop buckyballs to fight allergy

...than any anti-oxidant currently available, such as vitamin E. Free radicals are molecules that cause oxidative stress, which experts believe may be the basis of aging. “The immune system both protects us and causes harm, so we are always interested in finding new pathways to help manage the harmful effect...

Helping chlorine-eating bacteria clean up toxic waste

...said, it has been found that Dehalococcoides needs vitamin B-12, so the vitamin is added to cultures that are injected into cleanup sites. The bacterium also grows better in a mixe...

Pistachios lower cholesterol, provide antioxidants

... leafy vegetables -- beta carotene ?a precursor to vitamin A ?and gamma tocopherol ?the major form of vitamin E ?than other nuts. It is oxidized LDL and other lipproteins that contribute to plaque formation in...

Heavy multivitamin use may be linked to advanced prostate cancer

...that questions the beneficial value of antioxidant vitamin pills in generally well-nourished populations and underscore the possibility that antioxidant supplements could have unintended consequences for our health,?the authors write. ...

Fat overrides effects of vitamin C

...uce the protective effects of antioxidants such as vitamin C. Scientists at the University of Glasgow found t...ts, such as ascorbic acid (the active component of vitamin C), to protect against the generation of potential cancer-forming compounds in the stomach is less t...

Leukemia drug turns mini-molecules up, cancer genes down

New research shows that a form of vitamin A used to treat acute promyelocytic leukemia induces changes in an unusual class of small molecules called microRNAs (miRNAs) in the leukemic cells. The study also shows that three of these miRNAs inhibit the action of two genes important for cancer...

Studies force new view on biology of flavonoids

...and liver and excreted from the body. By contrast, vitamin C is absorbed 100 percent by the body up to a certain level. And vitamin C accumulates in cells where it is 1,000 to 3,000 times more active as an antioxidant than flavonoid...

Scientists genetically engineer tomatoes with enhanced folate content

...'t the only foods that pack a punch of folate, the vitamin essential for a healthy start to pregnancy. Resea...e folate content of fruits and vegetables." The vitamin is commonly found in leafy green vegetables like spinach, but few people eat enough produce to get t...

Navigable nanotransport

... The Korean researchers coupled spermine to the vitamin folic acid and packed these hybrid molecules into the capsule's pockets. This gave them capsules with a surface covered with folic acid molecules. What for? Many tumors have a significantly increased number of folic acid receptors on the surfaces of ...

Vitamins: Science doesn't always match policy

Some one hundred years after the first vitamin was named, what is known about them has not transl...al of Clinical Nutrition. "The evidence regarding vitamin use for prevention of chronic disease is still quite rudimentary, especially for multivitamins," say...

Misusing vitamin to foil drug test may be toxic; plus, it doesn't work

Taking excessive doses of a common vitamin in an attempt to defeat drug screening tests may s...from taking large amounts of niacin, also known as vitamin B3, in mistaken attempts to foil urine drug tests. Both adult patients suffered skin irritation,...

Chemo combination improves survival in asbestos-related cancer

...receiving pemetrexed and cisplatin ?along with the vitamin supplements folic acid and B12 ?survived nearly three months longer than patients getting cisplatin alone. Researchers led by John Green, M.D., at the Clatterbridge Center for Oncology in England, reviewed a study of 448 patients with advanced me...

Researchers urge monitoring of bone health during chemotherapy

...ed. And patients should consume enough calcium and vitamin D and get sufficient exercise to maintain strong bones." Weilbaecher and her colleagues found that when they gave mice an eight-day course of the growth factor, called granulocyte colony-stimulating factor (G-CSF), the mice lost bone mass and expe...

Genes may determine success of hip replacement surgery

...roteinase 1, or MMP1 for short, interleukin 6, and vitamin D synthesis. MMP1 is an enzyme that breaks down...ry the genetic variation. And variations in the vitamin D receptor gene almost doubled the chances of bone dissolution and deep infection. The authors co...

Sunshine pill for prostate cancer in 2009

...s claim. The drug, Asentar (DN-101), is based on vitamin D and is given to patients in the advanced stages ... drugs. Drug makers came up with the idea because vitamin D from sunlight improves the prognosis of certain cancers. But taking natural levels of the vitamin ...

MIT biologists solve vitamin puzzle

...overed the final piece of the synthesis pathway of vitamin B12-the only vitamin synthesized exclusively by microorganisms. B12, the most chemically complex of all vitamins, is ess...

New science of metagenomics 'will transform modern microbiology'

...roteins that are screened for capabilities such as vitamin production or antibiotic resistance. The Research Council report was requested by several federal agencies interested in the potential of metagenomics and how best to encourage its success. In particular, the committee was asked to recommend prom...

Vitamin D deficiency widespread during pregnancy

...ultivitamin supplements is not adequate to prevent vitamin D insufficiency, University of Pittsburgh research...nd other musculoskeletal and health complications, vitamin D insufficiency was found to be widespread among women during pregnancy, particularly in the norther...

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