Posts tagged as:

Chemical

Chemical From Medicinal Plants May Be Used To Fight HIV

by mokosam on November 18, 2008

Like other kinds of cells, immune cells lose the ability to divide as they age because a part of their chromosomes known as a telomere becomes progressively shorter with cell division. As a result, the cell changes in many ways, and its disease fighting ability is compromised.
But a new UCLA AIDS Institute study has found [...]

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Nature’s Own Chemical Plant

by mokosam on November 12, 2008

Crude oil is getting more and more expensive, a fact clearly felt by the chemical industry. An alternative source of carbon is biomass, for instance colza and whey, which can likewise be used to produce chemical products.
Petroleum is the feedstock for many products in the chemical industry. However, this fossil fuel is becoming increasingly scarce [...]

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Selective Reprogramming Of General Cells? Compounds For Stem-cell Production From Adult Cells Identified

by mokosam on November 7, 2008

Scientists from the Scripps Research Institute have identified a combination of small molecules that significantly improve the reprogramming of general adult cells into pluripotent stem cells, which can then develop into all cell types.
In the study, the scientists screened known drugs and identified small molecules that could replace conventional reprogramming genes, which can have dangerous [...]

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New Regulatory Mechanism Discovered For Cell Identity And Behavior In Forming Organs

by mokosam on November 7, 2008

 Two proteins interact in a previously unknown molecular mechanism that may have broad implications in future studies looking for the causes of defective organs in fetuses, metastatic cancers and other diseases, according to researchers at Cincinnati Children`s Hospital Medical Center.
Reporting their work in the Oct. 15 Genes & Development, the researchers said the mechanism coordinates [...]

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Maternal Obesity Can Program Fetal Brain To Induce Adult-onset Obesity

by mokosam on November 7, 2008

Researchers at the University at Buffalo have found that fetuses of obese mother rats were programmed in utero to develop obesity in adulthood.
Moreover, they have shown for the first time that the metabolic programming occurs in the fetal hypothalamus, the area of the brain responsible for maintaining the body`s energy homeostasis (body weight) throughout life.
Levels [...]

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2008 Sees Fifth Largest Ozone Hole

by mokosam on November 6, 2008

The ozone hole over Antarctica, which fluctuates in response to temperature and sunlight, grew to the size of North America in a one-day maximum in September that was the fifth largest on record, since NOAA satellite records began in 1979.
The Antarctic ozone hole reached its annual maximum on Sept. 12, 2008, stretching over 27 million [...]

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Earthworm Activity Can Alter Forests` Carbon-carrying Capabilities

by mokosam on November 6, 2008

Earthworms can change the chemical nature of the carbon in North American forest litter and soils, potentially affecting the amount of carbon stored in forests, according to Purdue University researchers.
The Purdue scientists, along with collaborators from the Smithsonian Institution and Johns Hopkins University, study the habits of earthworms originally brought to North America from Europe. [...]

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Bare Bones Of Crystal Growth: Biomolecules Enhance Metal Contents In Calcite

by mokosam on November 6, 2008

From shells to bones, the skeletons of organisms contain small amounts of impurity elements such as magnesium. Because the levels of these elements provide important clues to past environments, a considerable effort has focused on understanding how to relate impurity contents to the ancient environments in which an organism lived.
In the October 31 issue of [...]

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New Device Controls, Measures Dynamics Of Chemicals In Live Tissue

by mokosam on November 6, 2008

Measuring an electrical current in an organism is pretty straightforward. All you need is an electrode. Measuring the flow of chemicals in cells or live tissue, however, is much more difficult because the molecules diffuse, mix with one another, and interact with their surroundings.
So to help understand biological processes, university researchers have invented a new [...]

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Could Life Have Started In Lump Of Ice? Very Cold Ice Films In Laboratory Reveal Mysteries Of Universe

by mokosam on November 6, 2008

The universe is full of water, mostly in the form of very cold ice films deposited on interstellar dust particles, but until recently little was known about the detailed small scale structure. Now the latest quick freezing techniques coupled with sophisticated scanning electron microscopy techniques, are allowing physicists to create ice films in cold conditions [...]

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