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Tag: "special" at biology news

Mystery solved: Gold's power against autoimmune diseases defined

... the Feb. 27 issue of Nature Chemical Biology that special forms of gold, platinum, and other classes of medi... just one member of a class of metals, including a special form of gold, that all render MHC class II proteins inactive. In subsequent experiments in cell cul...

Tetracycline plus teeth equal gray smile

...Dr. Capehart. However, Dr. Capehart developed a special treatment plan for a patient who was embarrassed by his tetracycline-stained smile, but who could not afford such costly treatment. He developed a personalized treatment plan for the patient, which allowed him to significantly alter the shade of his ...

New MRI technique shows emphysema in asymptomatic smokers

...sease. The researchers had 19 volunteers inhale a special kind of "hyperpolarized" helium before they performed two MRI tests of the lungs. Eleven of the volunteers were smokers with no symptoms of emphysema, and the remaining eight were nonsmokers. The first image the researchers acquired showed obstructed...

Chemical in many air fresheners may reduce lung function

...th and Nutrition Examination Survey (NHANES) and a special component of the study specifically designed to assess the level of common pesticides and VOCs in the US population. NHANES III is a nationally representative survey conducted by the Centers for Disease Control and Prevention between 1988-1994 to de...

Chimpanzees can transmit cultural behavior to multiple 'generations'

...wo separate social groups, to train them to open a special testing box one of two ways Ð either by sliding or lifting the door Ð to reveal fruit inside. Chimpanzees in a third social group, used as the control group, were allowed to explore the testing box but were given no instruction or training to open th...

Bones hold the key to blood renewal

...can give rise to any kind of blood cell, reside in special 'stem cell niches' nestled in the bones' inner walls. Inside these sheltered nurseries, the stem cells remain undifferentiated; with the help of other nearby cells, they hang on to their juvenile qualities. Only when they leave the niches do they mor...

Selenium-protein deficiency raises prostate cancer risk

...otein in particular, glutathione peroxidase, is of special interest to Diamond and his associates. They plan to run new tests using new mice genetically modified to reduce levels of just this one selenoprotein. "If reductions result in accelerated prostate cancer, then we have our player," he said. Other U...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...e it turned up," Harrison said. "There's nothing special about Akilia Island," Manning said. "If life was there, it should have been abundant on Earth 3.83 billion years ago. The only place where that's been tested so far, also in Greenland, has come up positive." One of the key methods for dating the ro...

Brazil creates buffer zone around coral reefs off Atlantic coast

...ound protected areas offer strong protection, with special permits from environmental authorities required for any economic use. "The buffer zone will guarantee the biodiversity integrity in the Park and ensure that local communities can continue carrying out their means of livelihood through traditional f...

New egg freezing technique offers hope to hundreds of women

... in a tiny amount (less than 0.1 microlitres) of a special vitrification solution, before storing in liquid nitrogen. This process prevents ice crystals forming, which do so much damage to the structure of the egg. Dr Kuwayama froze 111 eggs, of which 94.5% survived freeze-thawing, 90.5% were fertilised usin...

Basic work on E. coli identifies two new keys to regulation of bacterial gene expression

...ation is achieved not because the promoter makes a special contact, but because it can't establish contact at all," says Gourse. "This is an example of how sometimes less is more, and a probably very ancient example of one of the methods that arose through evolution to regulate gene expression." Ribosomal R...

First-ever genomic test predicts which lung cancer patients need chemotherapy to live

...DNA sequence on the gene chip. When scanned with special light, the fluorescent RNA emits a telltale luminescence that demonstrates how much RNA is present on the chip ?and thus which genes are most active in a given tumor. The physicians then use a rigorous statistical analysis to assess the relative risk...

Beekeepers work hard for the honey, despite changing tupelo forest

...art of our identity," Watson said. "It's something special to Florida." ...

When it comes to gene transcription, random pauses aren’t quite so random, study finds

... study, created experimental DNA templates using a special 240-base pair sequence that triggers one of two types of long pauses in RNAP--a "backtracking pause" associated with gene regulation in which the enzyme reverses direction briefly; or a "hairpin pause, " named for tiny hairpin-shaped structures that ...

Pathway toward gene silencing described in plants

... found the other half of the team located within a special nuclear compartment known as the nucleolus, long known to be the production center for ribosomes. "She got a brilliant signal in the nucleolus, a brilliant dot in the same place for each of the proteins," said Pikaard. Using RNA-FISH, Pontes also...

Study shows frogs can play key role in stem cell research

...eins perform in frog embryos, Dr Morrison injected special compounds into very young embryos, to inactivate the native PouV proteins. These embryos continued to grow, but had defective heads and tails. When the scientists looked closely at these embryos, they found that cells had become specialised before ...

3-D model reveals secrets of metastasis

...rk Zaman worked with one sample at a time, using a special confocal microscope at the Whitehead-MIT BioImaging Center. The microscope divided each specimen into virtual slices, generating a new stack of images every 15 minutes. "It took me about a year to get enough data because the microscope wasnâ?super&...

The molecular post office inside the cell

...ne" is made up of a single active ribosome, plus a special signal recognition protein and a matching receptor. The scientists have shown that when the three proteins interact, certain areas open up on the ribosome, which allows the ribosome to dock onto another complex. The later complex, which is called tra...

Proteins as parents

...and so that our heart beats, we need proteins with special mechanical properties, "molecular springs", which give our tissues the necessary strength and take care of elasticity and tensibility. Such proteins are also interesting as building blocks for novel high-tech materials because the natural materials o...

Eminent inventor of DNA fingerprinting gains new recognition

...e presented on Thursday 28 September 2006 during a special session of the Royal Netherlands Academy of Arts a...ip and art are presented every other year during a special session of the Royal Netherlands Academy of Arts and Sciences. This year the presentation will take ...

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