Tag: "external" at biology news

Researchers at Vanderbilt's Free-Electron Laser Center are developing new forms of laser surgery, improved X-ray technology, and better methods for protein identification

... The center currently receives about $3 million in external support from the Department of Defense, the National Institutes of Health and several foundations. Center management has identified four areas for growth: materials science, particularly the use of the FEL in nanotechnology research; laser surgery; p...

Clues to development of eye's light-sensitive cells found

...s differentiate into photoreceptors in response to external and internal cues. Since Nrl is needed for rods to develop, it will be important to know what cues turn Nrl on. In addition, because the precursor, or stem, cells that give rise to rods and cones experience delays before expressing a specific cell ty...

Brain researchers discover bright side of ill-famed molecule

...orm enough synaptic contacts. Thus, they depend on external sources of this component. Where does the extra cholesterol come from? Pfrieger remarks that "the brain cannot tap the cholesterol supply in the blood, since the lipoproteins that mediate the transport of cholesterol - including the notorious ldl and...

Major stress during pregnancy linked to autism

... that autism is also linked to external factors, such as prenatal stress," he said. Beversdorf and his collegues asked mothers to document their stress levels when stressful events occurred during their pregna...

Lancet study shows DiaPep277 arrests progression of Type 1 diabetes

... progression of the disease. Even with the use of external insulin, type 1 diabetes and LADA usually result in a drastic reduction in quality of life and late stage complications. Peptor, Ltd., is a biopharmaceutical company engaged in the discovery and development of breakthrough drugs to cure autoimmune di...

Single virus tracing sets the stage for new infection-fighting drugs and gene-therapy strategies, Science authors say

... a fraction of all single viruses make it past the external cell membrane, new research suggests. But, once inside, the successful invading virus has a good chance of penetrating its target, the nucleus, within a few minutes. Surprisingly, researchers report in the 30 November 2001 issue of the journal Scie...

Protein may play role in sex chromosome inactivation

...k at one end of the Tsix gene to which an unknown external protein would bind and work with Tsix to cause the X chromosome to remain activated. Their earlier experiments revealed a candidate region of the genome adjacent to Tsix where the protein would likely bind; and Lee and her colleagues reasoned that ...

The ecological consequences of 'promiscuous' boating

...ra mussels were to attach themselves to the boat's external surfaces, the authors concluded that they probably would not survive exposure to the air during transit. The researchers also found zebra mussel larvae in every area where water is stored on a boat, including the engine cooling system, bilge water,...

Single enzyme may be linked to obesity

...sitive to weight gain when fed a high-fat diet. An external examination of the mice showed prominent weight gain in the abdominal areas of the Tg mice. Further tests using X-ray absorptiometry to measure fat in the whole body and in the abdominal region showed that fat accumulation in the abdominal region of ...

Primitive microbe offers model for evolution of animals

... sensors that nestle in the cell membrane. When an external chemical plugs into the receptor, like a key into ...activated by MBRTK1, to understand what effect the external signal produces in the choanoflagellate. "In general, these discoveries have made us confident that ...

URI researcher receives park service grant to identify environmental threats to wetlands in the northeast park system

...boundaries, are exposed to a suite of threats from external development activities and many have been influenced by such activities for centuries. In response to increasing urbanization, the ecological structure and function of wetlands can be altered, sometimes quite dramatically. URI research associate Mar...

Control of fat cell development demonstrated using Sangamo BioSciences' ZFP technology

...n the paper represent a significant advance in the external application and validation of Sangamos ZFP transcription factor (ZFP-TF) technology, which enables the specific control of genes within an organism. Sangamo ZFP-TFs specifically repressed expression of a gene variant, or isoform, in a mouse cell type...

Monitoring epithelial plasticity, one cell at a time

...al cells over several hours following reduction of external pH. Just as is seen in the living kidney following a period of acidosis, CCD cells undergo a morphological change and shift their polarity to favor HCO3? reabsorption. Building on their earlier identification of the ECM protein hensin as a key factor...

January media highlights: GEOLOGY and GSA TODAY

...ures such as internal channel systems and delicate external columns and plumes that are characteristic of modern biofilms. This discovery of recognizable biofilms in rocks up to 500 Ma provides a new way of identifying fossil bacteria, not only on Earth, but also in rock samples from other planets. Ostracod...

Basis of rare genetic illness leads to better understanding of bone formation, Hopkins researchers find

...ritical role in a cell's ability to respond to its external environment. Part of an elegantly complex metabolic system called a signal transduction pathway, Gs-alpha at normal levels allows cells to respond to hormones by influencing which genes are turned on and off, as well as controlling the action of many...

New research findings offers possible clues for avoiding sudden infant death syndrome (SIDS)

...f gas exchange: (1) infants' gas exchange with the external environment through air-channel formation in bedding, (2) infants' gas exchange with the bedding as affected by gas gradients, (3) infants' ventilatory responses to hypercapnia and hypoxia during rebreathing and gas exchanging efficiency of different...

Protein may be target for new cancer drugs

...important because cells turn off their response to external growth signals by decreasing the number of recepto...ysosome for degradation. A receptor may receive an external chemical signal such as a growth hormone at the cell surface, but that may not necessarily activate ...

Preventing overload in the brain

...overloaded and can no longer respond adequately to external signals. The patient then becomes unconscious. There are indications that the interneurons in epilepsy patients are affected, with the result that the pyramidal cells are less well controlled. Future research needs to establish which of the two type...

Cells on the verge of suicide

... development, virtually all cells require specific external signals called "survival" factors or "trophic" factors - which are secreted from neighboring cells - to survive. Those that do not receive the trophic signals commit suicide by default. That is, cells have to compete for trophic signals in order to s...

Tether for water channels found: May impact research on brain swelling

...uscle, this complex helps link muscle cells to the external scaffolding that provides the muscular architecture. "The standard answer to why muscles deteriorate in these diseases is that the muscular architecture is weakened," says Neely. "We've shown that the same protein complex involved in muscular dystrop...

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