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Tag: "properties" at biology news

Carnegie Mellon scientists find key HIV protein makes cell membranes bend more easily

...diffuse scattering, the team quantified structural properties of different lipid bilayers seeded with FP-23 peptides. The lipid bilayers varied in their thicknesses, which affects the stiffness of cell membranes. The research was conducted at Cornell University’s CHESS synchrotron, which provides a high-intens...

FDA sees nanotech challenges in every product category it regulates

...ons. Because the chemical, physical and biological properties of nanoscale materials are often different from their larger counterparts, they potentially lead to different safety issues. The report’s recommendations that FDA provide clear nanotechnology-associated guidance for manufacturers in all areas of agen...

How sneaky HIV escapes cells

... The major HIV protein ‘Gag’ has both of these properties that cells sense in selecting exosomal cargoes. When the researchers removed the tethers or clumping signals from Gag it could no longer get out of the cell. However, if they were replaced with synthetic membrane anchors and clumping domains Gag rega...

New study reports hotel guests at risk from carbon monoxide poisoning

... installed widely by the lodging industry, even at properties where guests and employees have been injured by CO. No official statement from the American Hotel & Lodging Association (AH&LA) was found pertinent to CO poisoning prevention, although the AH&LA educational foundation contracted with Schi...

Bigger horns equal better genes

...ry ago for sport and the purported pharmacological properties of their horns. The last survivors were protected in an Italian national park, and the species has slowly repopulated and today is no longer considered endangered. ...

Nurtured chimps rake it in

...ed not only whether the chimpanzees understood the properties of the tool, but also whether they understood the ... that both of these groups understood the physical properties of the two different rakes. The researchers then presented the same two groups with two identical...

Research finds that circadian rhythms dominate all life functions

...as previously believed. Knowing about oscillation properties of genes involved in metabolism is essential for understanding how genes interact with and regulate health and disease. Colorado State University researcher Andrey Ptitsyn's new analysis of data collected through several studies establishes a baselin...

Potent possibilities for parasite attack

...sgow. Some families of genes that determine the properties of the parasite cell surface have grown in number and some declined among the three species: 'death' of genes seems to be a major force for differences between the parasite genomes. Some genes, however, are evolving rapidly, leading the team to suspe...

Detecting cold, feeling pain: Study reveals why menthol feels fresh

...they are exposed to high ambient heat or the fiery properties of peppery food. (Science, April 14, 2000). The study demonstrated that capsaicin and noxious heat elicit the sensation of burning pain through activation of the same receptor on sensory neurons. Most recently, they identified the receptor of iso...

Catching cancer's spread by watching hemoglobin

...advantage of the natural multiple-photon-absorbing properties of hemoglobin, the red-blood-cell molecule that ca... but rather relies on the inherent light-absorbing properties of hemoglobin. While the technique has been demonstrated in vitro (by excising tissue samples and im...

Protein enables discovery of quantum effect in photosynthesis

...e of this protein and we understand the electronic properties of it very well, too," said Blankenship. "It's taught us a lot about how chlorophylls interact with proteins. It was ideal for this study." Blankenship's colleague, Graham R. Fleming, Ph.D., Deputy Director of the U.S. Department of Energy's Law...

8 plants from South Africa may hold potential for treating high blood pressure

...and heart. ACEI, in particular, provide beneficial properties to patients with type 1 diabetes. In an effort ...ons In this study Tulbaghia violacea has shown properties related to lowering blood pressure. Since the number of hypertensive individuals around the world is...

New Brandeis research sheds light on memory by erasing it

...P induction and can enhance synaptic transmission, properties that are necessary for a memory molecule. Like a computer whose electronics change with the addition of new information, molecular activity in the hippocampus, where memory is stored in the brain, changes as memory is being stored. In this study, ...

Scientists identify prion's infectious secret

... provide a new framework for us to begin exploring properties of prion biology that, up until now, have proven difficult to investigate," says Whitehead Member and MIT Professor of Biology Susan Lindquist, senior author on the paper, which will appear in the May 9 online issue of Nature. Proteins are the ce...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...r@yantis.com ) will discuss interesting acoustical properties in the Salt Lake Tabernacle and Latter-day Saints ... on the planet and provide information on surface properties such as terrain topography (3aPAb4). Jean-Pierre Williams ( jpierre@gps.caltech.edu ), Andi Petcule...

Research says boiling broccoli ruins its anti-cancer properties

...boiling vegetables severely damages the anticancer properties of many Brassica vegetables such as broccoli, Brussel sprouts, cauliflower and green cabbage. Past studies have shown that consumption of Brassica vegetables decreases the risk of cancer. This is because of the high concentration in Brassicas of sub...

Intelligent materials to regenerate bone tissue

...plant to provide both functional and physiological properties of the damaged item. Given this hypothesis, the bone implants have to comply with a series of requisites capable of contributing to a reconstruction of the deteriorated bone tissue in the most efficient and least discomfiting manner, without any seri...

Revealing the machinery underlying the 'plastic' juvenile brain

...mong the central mysteries of neurobiology is what properties of the young brain enable it to so adeptly wire itself to adapt to experience—a quality known as plasticity. The extraordinary plasticity of the young brain occurs only during a narrow window of time known as the critical period. For example, childre...

Natural antibiotics yield secrets to atom-level imaging technique

... using solid-state NMR to explore the germ-killing properties of natural antibiotics called antimicrobial peptid...bs," Ramamoorthy said. "We'd like to exploit their properties to design super-smart bombs, but before we can do that, we need to understand how these AMP smart bo...

Scientists identify pancreatic cancer stem cells

...That theory suggests that only cells that have the properties of "stemness" -- that is, cells that can self-renew and differentiate into other types of cells -- are the only ones capable of producing tumors. These "cancer stem cells," could derive from normal adult stem cells in organs that have mutated, or fro...

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