essential 2 3

Tag: "essential" at biology news

When your brain talks, your muscles don't always listen

...mmands. "The repeated contraction of muscles is essential to movements such as walking," Knight said. "However, our muscles have a reduced capacity to contract or 'twitch' as we grow older. We lose fast-twitch muscle fibers as we age." However, there are steps we can take to preserve this critical motor ...

3-D ultrasound identifies women at risk for impending preterm birth

...comes positive in relationship to preterm birth is essential for a test with high diagnostic accuracy. "The high accuracy, sensitivity and specificity of the adrenal gland volume in predicting preterm birth within five days from the time of examination proves that 3-dimensional ultrasound evaluation of the fet...

Africa's first large-scale HIV vaccine study launches

...n South Africa are robust and mature, and they are essential for running trials involving thousands of volunteers," said Kublin, who is a staff physician in the Hutchinson Center's Clinical Research Division and a clinical associate professor of health services at the University of Washington School of Public ...

Cocoa 'vitamin' health benefits could outshine penicillin

...rrently meet the criteria. Vitamins are defined as essential to the normal functioning, metabolism, regulation ...the science does not support epicatechin having an essential role. But, Fabricant, who is vice president scientific affairs at the Natural Products Association, ...

How fish species suffer as a result of warmer waters

...owever, in order to estimate future changes, it is essential to develop a deeper understanding of the effect of water temperature on the biology of organisms under question. A new investigation, just published in the scientific journal Science, reveals that a warming induced deficiency in oxygen uptake and sup...

Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps

... rhesus genome sequence will also serve to enhance essential research in neuroscience, behavioral biology, reproductive physiology, endocrinology and cardiovascular studies. In addition, the rhesus serves as a valuable model for studying other human infectious diseases and for vaccine research. The seque...

Antifungal drug kills TB bug

...ans, P450s oxygenate molecules in the body and are essential for steroid metabolism; they are also prevalent in...y blocking the actions of one of its P450s that is essential for maintaining the cell structure," said Professor Munro. "We were able to show in laboratory exper...

Molecular differences between early and advanced melanomas could provide new drug targets

...ion, but that the mitochondrial mutations were not essential for the aggressive growth of melanomas induced by Akt. "Our research shows that Akt overexpression on its own is sufficient to transform radial growth melanoma cells into highly invasive tumors via reactive oxygen pathways," says Dr. Arbiser. "T...

New mechanism for nutrient uptake discovered

...d that the interaction of neighboring molecules is essential to this regulation. Since plants, animals, bacteria, and fungi all share similar genes for this activity, the scientists believe that the same feature could occur across species. The discovery, published in the February 11th on-line edition of Nature...

Trusting your instincts leads you to the right answer

...seems like a random darting of the eye is often an essential subconscious scanning technique that allows us to pick out unique and distinctive features in a crowd ?such as colour or orientation. Soon after our eyes have fixed on a target, the conscious or top-down part of cognition engages and examines whether...

Penn study on olfactory nerve cells shows why we smell better when we sniff

...e still don't know how it happens, but sniffing is essential for odor perception." ...

Manipulating nature: Scientists query wildlife birth-control method

...system to produce antibodies that act against some essential event or structure in the reproductive process. The antibodies can act against sperm, eggs or reproductive hormones, which prevent either fertilization or the production of sperm and ova. Proponents of the technique, which was first tested nearly...

Why doesn't the immune system attack the small intestine?

...s. The small intestine, for example, which absorbs essential nutrients from food and drink and protects the bod...eagues found that, in fact, dendritic cells aren't essential in creating tolerance in T cells. Instead, and unexpectedly, tolerance is produced by stromal cells ...

Biologists develop large gene dataset for rice plant

...reased understanding of how genes work in rice, an essential food for much of the world's population. Plant biologist Blake Meyers at the University of Delaware and colleagues report their results in the March 11 on-line issue of the journal Nature Biotechnology. Using advanced gene sequencing technologies...

Turning green gunk to gold, anti-cancer gold

...al product compounds and their analogs is often an essential step in drug development. With drugs such as penicillin and tetracycline, it can easily be done, but cryptophycins present more of a challenge. Sherman's team realized that with all cryptophycins, the most difficult step came very late in the synthes...

Researchers discover gene crucial for nerve cell insulation

... "The researchers have deciphered a key sequence essential to the assembly of myelin," said Duane Alexander, M.D., Director of the NICHD, the NIH institute that funded the study. "Their discovery will provide important insight into the origins of disorders affecting myelin production." The study appears ...

Scientists find new genes for Crohn's disease

...ariations in the ATG16L1 gene, which they found is essential for the cell's normal mechanism for degrading worn-out cellular components and helping to eliminate some pathogenic bacteria—a pathway known as autophagy (pronounced AU-TOF-A-GEE ). Finding ATG16L1's involvement in Crohn's disease provides confir...

New findings blow a decade of assumptions out of the water

...n can it be used to build amino acids and proteins essential to all life. Eventually the fixed nitrogen is returned to its gaseous state, a process called denitrification. Scientists have known for several decades that denitrification occurs in the deep, low-oxygen waters of the Pacific and Indian oceans. ...

Protein overexpression at heart of heart failure

...milial forms. Intracellular [Ca2+]i homeostasis is essential for normal cardiac function and integrity, and dysregulation of [Ca2+]i is a hallmark of advanced heart failure.2 The primary trigger for cardiac [Ca2+]i transients is calcium entry through the pore subunit of the voltage-dependent L-type channels (L...

Elucidation of the genome for diabetics with DNA chips

...ther genes) controlling the Wnt signalling pathway essential for cell survival. Studies in animals have shown t...ent present in very small amounts in the body, but essential for survival. Zinc deficiency is common in developing countries and has been associated with many d...

1 2 3 4 5 6 7 8 9 10