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Tag: "chemical" at biology news

Researchers link ocean organisms with increased cloud cover and potential climate change

...a new and potentially important mechanism by which chemical emissions from ocean phytoplankton may influence t...at airborne particles produced by oxidation of the chemical isoprene ?which is emitted by the phytoplankton ?may have contributed to a doubling of cloud droplet...

Common ancestry of bacterium and plants could be key to an effective new treatment for chlamydia

...sine is probably used by Chlamydia to synthesize a chemical found in bacterial cell walls. It is the synthesis of cell walls that is inhibited by penicillin. This discovery points to the likelihood that, if researchers could find an inhibitor for L,L-diaminopimelate aminotransferase they would have a new ant...

A silent pandemic: Industrial chemicals are impairing the brain development of children worldwide

...systematically examined publicly available data on chemical toxicity in order to identify the industrial chemi... to damage the human brain, and they conclude that chemical pollution may have harmed the brains of millions of children worldwide. The authors conclude further...

The power of one: A simpler, cheaper method for cell fusion

...engineered to bond to one another by using a minor chemical treatment. Cells are first placed in an aqueous chamber within the chip, where they pair off. In contact with one another but not yet fused, the cells flow towards the only exit, which is a miniscule gap that channels electricity from one pole to the...

Life in the extreme

...t and into the water. The cold-seep fluids contain chemical compounds produced by the decomposition of organic materials or by inorganic chemical reactions which occur at high temperatures and pressures. Near cold seeps in the Eastern Mediter...

Who gives stem cells their marching orders?

...a truly awesome feat of nature. As they bathe in a chemical soup they've manufactured themselves, stem cells react to subtle changes in chemical concentration, moving apart and taking on distinct identities. The million-dollar question: How do t...

Proteins necessary for brain development found to be critical for long-term memory

... are over. When the animals are shocked, a brain chemical known as serotonin is released that promotes the formation of a long-term memory associated with the shocks. However, when Carew and his colleagues blocked the interaction between the BDNF-like growth factors and the TrkB receptors, they found that s...

New technique boosts size of proteins that can be analyzed

...esses as oxidation and acetylation of proteins add chemical groups and alter how a protein functions, such as ... Mi Jin, a postdoctoral associate in chemistry and chemical biology and one of the paper's lead authors with fellow graduate student Xuemei Han. Jin said that t...

Molecules in blood foretell development of preeclampsia

...d Dr. Levine. The second protein involved in the chemical imbalance is called soluble fms-like tyrosine kinase 1 (sFlt1). The women in the study who had developed preeclampsia had increased levels of sFlt1. The increase in sFlt1 was accompanied by reduced levels of a substance, placental growth factor (Pl...

Selecting life: Scientists find new way to search for origin of life

...t radiation in the atmosphere or volcanic heat and chemical reactions in the deep oceans. Some of these buildi...ht variants. For a transition to occur between the chemical and biological eras, some process had to separate and concentrate the left- and right-handed amino a...

Nature's process for nitrogen fixation caught in action

...trogen gas is converted to ammonia fertilizer by a chemical process that involves high temperature and high pr...ase, follows the same pathway as recently reported chemical methods. Their research method resulted in the ability to witness steps in the biological process th...

Hopkins scientists link immune response to 'ghost' parasites and severely congested sinuses

...hns Hopkins have linked a gene that allows for the chemical breakdown of the tough, protective casing that hou...l. Researchers say that although chitin, a rigid chemical compound common to fungi, insects and roundworms, is not naturally found in the human body, the pres...

BC catalyst discovery promises faster, cheaper drug production

...handed nature of certain molecules. Many important chemical compounds that exist in nature or are created by l...a great example of how NIH support for fundamental chemical research can benefit the American health care consumer," said John M. Schwab, a chemist at the Natio...

Firefighters face increased risk for certain cancers

...e believe there's a direct correlation between the chemical exposures firefighters experience on the job and their increased risk for cancer," says LeMasters, professor of epidemiology and biostatistics at UC. Firefighters are exposed to many compounds designated as carcinogens by the International Agency ...

Pheromone from mother's milk may rapidly promote learning in newborn mammals

...y pheromone secreted in mother's milk may act as a chemical booster that facilitates the ability of pups to quickly associate environmental odors with the opportunity to nurse. The findings, which deepen our understanding of pheromone function and how learning occurs in the earliest days of life, are report...

Engineered yeast speeds ethanol production

... postdoctoral associate in the laboratories of MIT chemical engineering professor Gregory Stephanopoulos and Whitehead Member Gerald Fink, took a new approach. The team targeted two proteins that belong to a class of proteins called transcription factors. These proteins typically control large groups of g...

American scientist's research of life's first cells

... biological processes in terms of the physical and chemical properties of molecules in a cell. A judging panel selects the GE & Science Prize for Young Life Scientists grand prize winner and may present regional awards in four geographic regions: North America, Europe, Japan and all other countries. Th...

Researchers identify new weapon to fight deadly bacterial sepsis

...the scientists have accomplished this feat using a chemical compound very similar to a diabetes drug already in stage three clinical trials in the United States, the final level of human experimentation before a drug is considered for federal licensing approval. If those diabetes trials prove successful a...

'Erectile dysfunction' drugs heighten natural anti-cancer activity

...otence drugs" that boost the production of a gassy chemical messenger to dilate blood vessels and produce an e...icine, the Hopkins team says boosted levels of the chemical messenger nitric oxide appear to dampen the effects of a specialized cell that diverts the immune sy...

Fast test for low blood flow in dogs detects early heart trouble

...en underwent the standard test for blood flow with chemical beads. The beads, no bigger than 20 micrometers in diameter and called microspheres, were injected into the animal's bloodstream. Previous research has shown that they will lodge into the heart muscle at a fixed rate compared to how fast blood is f...

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