proposed 2 6

Tag: "proposed" at biology news

New partnership to clear landmines for African Elephants

...rs. The ranging area of these elephants within the proposed multi-country Kavango Zambezi Transfrontier Conservation Area (Kaza TFCA) is reduced to a fraction by the buried ordnance. To restore nature's balance and human livelihood, landmines and other explosive remnants of war must be cleared from critical ...

India's smoking gun: Dino-killing eruptions

...us-Tertiary (K-T) mass extinction. "As originally proposed by Vincent Courtillot in 1986, the volcanism might be a key player in mass extinctions," said Chenet. "Research in India has shown the remnants of the impact - iridium in sediments - sandwiched between lava flows, implying that volcanism started befo...

Researchers develop gene therapy to reverse pulmonary arterial hypertension

...' or a form of neoplasia to be more precise, first proposed by Drs. Voelkel and Tuder from the University of Colorado. We've demonstrated for the first time that, like cancer, apoptosis is suppressed in the lung blood vessel wall in this disease." "Our biggest challenge in treating PAH is the fact we don't k...

WCS says avian flu prevention should focus on farms, markets

...ecent outbreaks of avian flu in other regions, WCS proposed and with the United Nations Food and Agriculture Organization funded an expedition to Mongolia to examine the role of wild birds in the spread of avian influenza. Previously, outbreaks in wild birds have either been in close proximity to infected do...

Suppressing growth hormone in early adulthood may prevent cancer

...s cell growth and prevents cell death and has been proposed to be a factor in the initiation of cancer. "Elevated IGF-1 levels in pre-menopausal women have been demonstrated to be a risk factor for breast cancer as well as numerous other cancers," said Sonntag, professor of physiology and pharmacology at the...

Simple explanation for complex pattern of feather development

...n, pioneering computer scientist and code-breaker, proposed that repeated patterns could emerge through the interactions among chemical morphogens or molecules that cause things to develop -- an activator that makes things happen, and an inhibitor that suppresses the activator. To test the model in feathers,...

Study: Predatory dinosaurs had bird-like pulmonary system

...d Harvard University. Though some scientists have proposed that predatory dinosaurs had lungs similar to crocodiles and other reptiles, a new study published in this week's issue of the journal Nature suggests the ancient beasts boasted a much bigger, more complex system of air sacs similar to that in today'...

3D Atlas Will Help Navigate The Spinal Cord

...a from experiments in animals back to humans. The proposed description of the structure of the spinal cord will be based on a comprehensive use of neurochemical markers (chemoarchitecture). Many pathways in the nervous system contain a particular protein which can be demonstrated in tissue sections using a t...

Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

...control sensitivity during exercise as classically proposed (by J Holloszy and E. Coyle)?We hope that the present observations will stimulate additional research to clarify the precise nature, time course, and significance of the physiological adaptations induced by short sprint interval training." The study...

Scientists devise way to measure RNA synthesis on the fly in a live cell

...h gravity to explain the motion of galaxies. "They proposed the hypothesis that the motion of galaxies is affected by the presence of invisible matter called 'dark matter,'" Cluzel said. In recent years, astronomers have rushed to design experiments that might help them determine what dark matter is made of....

Most common lung cancers may begin in newly discovered cells

...ved in repair and maintenance of tissue. They have proposed that these junctions might be a stem cell niche. Bender Kim and her co-authors first isolated the stem cells, which they named bronchioalveolar stem cells (BASCs), from the earliest stage of the mouse tumors. Then, she purified them from the lungs o...

Life detection instrument passes key test on road to Mars

... Mathies said that his experiment is the only one proposed for ExoMars or the United States' own Mars mission - NASA's roving, robotic Mars Science Laboratory mission - that could unambiguously find signs of life. The experiment uses state-of-the-art capillary electrophoresis arrays, novel micro-valve system...

Lipids get new comprehensive classification system

...ys of lipid structures. In conjunction with their proposed lipid classification scheme, the group has also proposed a nomenclature system. "The nomenclature rules adopted by LIPID MAPS follow existing IUPAC-IUBMB rul...

An (ecological) origin of species for tropical reef fish

...arriers. According to standard evolutionary theory proposed by Dobzhansky and Mayr more than 50 years ago, mountain building, island formation, glaciation and other processes isolate populations within a species. Over evolutionary time, these populations mutate independently until individuals from distinct po...

Ancient immune defense mechanism is no match for HIV-1

...o suggest that their findings raise a challenge to proposed therapeutic strategies making use of RNAi. "Because HIV-1 evades all other RNAi by point mutations, we reason that its requirement for an SRS is solely to shield this last 'Achilles' heel that we think HIV-1 cannot alter for functional reasons. The s...

Discovery clarifies role of peptide in biological clock

... to synchronize their timing. Some researchers had proposed that knocking out VIP or the receptor for it stopped the clock," Herzog said. "We've found that the biological clock is still running, but its internal synchrony is uncoordinated. This causes irregular patterns of sleep and wake, for example." The s...

Researchers develop assay that could be applied to drug screening

...e basic model of clathrin-mediated endocytosis was proposed 41years ago, there are many basic questions outstanding," Zenisek said. "For instance, it wasn't known whether single clathrin coated pits give rise to single clathrin coated vesicles. We have now shown directly that coated pits can produce multiple ...

Basis for DNA ejection from single phage particles

...oorly understood injection process, which has been proposed in the past to occur through the release of pressure accumulated within the viral particle itself. Almost all phages (also known as bacteriophages) are formed of a capsid structure, or head, in which the viral genome is packaged during morphogenesis...

The evolutionary triumph of flower power

...le at least in part for their appearance. With the proposed model of evolution and adaptation to a human emotional niche, perhaps we have a clearer picture of our floral companions." ...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ronmental scientist David Larom and his co-workers proposed that, under ideal atmospheric conditions, low-frequency calls could travel 6 miles or more through the air. Now in private industry, Larom has long been intrigued by O'Connell-Rodwell's work. "This is important basic research," he says. "Like all cr...

1 2 3 4 5 6 7