Tag: "class" at biology news

Gold quantum dots have applications in biological labeling, nanoscale optics

A new class of water-soluble quantum dots made from small numb...energy transfer pairs. "We have discovered a new class of quantum dots that are water soluble, strongly fluorescent, and display discrete excitation and em...

Cleaner water, more efficient electricity among UH chemical research

...er-based polymers, as well as development of a new class of biodegradable and biocompatible polymer composites with enhanced mechanical properties that are lightweight for potential applications in biomedical devices and drug delivery using carbon nanotubes. P. Shiv Halasyamani, assistant professor of ...

Scientists reinvent DNA as template to produce organic molecules

...together without having to develop an entirely new class of enzymes for each different type of molecule." The 10-base DNA strands used by Liu's team are large enough to be stable at room temperature and in theory can encode thousands of individual small organic molecules. Liu's co-authors are Zev J. Gartne...

The first engineering of cell surfaces in living animals

...tion between a functional group called an azide (a class of compounds with three nitrogen atoms) and a phosphine (a molecule containing a phosphorus atom). Neither azides nor phosphines have harmful effects -- indeed they are useful in some drugs: the A in AZT, azidothymidine, is for azide -- but they rapi...

JCI table of contents, 16 August, 2004

...tilizes the fact that a specific molecule, the MHC class I chainrelated molecule (MIC), is often expressed ... Prevalent expression of the immunostimulatory MHC class I chainrelated molecule is counteracted by shedding in prostate cancer AUTHOR CONTACT: Jennifer D. ...

MICs shed light on prostate cancer

...tilizes the fact that a specific molecule, the MHC class I chainrelated molecule (MIC), is often expressed on the surface of some tumor cells. MICs interact with the immune system's natural killer cells and trigger them to destroy the tumor cells. Jennifer Wu and colleagues, at the University of ...

Protective gene may enhance vaccine responses

...sity of Chicago have discovered the first of a new class of "protective factors" that appear to be required for the development of memory T cells, the cells that form the core of a vaccine response. The finding could help scientists create more effective vaccines and may lead to potent immune system-based...

Last of known genes identified in complex obesity syndrome

... the protein work properly." ARL6 is a member of a class of proteins that bind GTP, or guanosine triphosphate -- a class given the obvious title of GTP-binding proteins. GTP-binding is a critical step in a wide variety of...

Emory researchers map structure of anti-cancer molecule

...ve solved the structural puzzle of how an emerging class of promising cancer drugs work to halt cell division. The discovery potentially opens the door to the creation of more effective cancer treatments. "Uncovering and mapping the structure of this model system will assist scientists around the...

Body's own defense against H. pylori, cause of stomach ulcers and stomach cancer

...layer, where the mucous cells produce a particular class of glycoproteins, called O-glycans, linked with the carbohydrate alpha 1,4-N-acetylglusoseamine, cloned previously in Dr. Fukuda's laboratory. Because the alpha 1,4-linked N-acetylgucosamine is confined to the stomach's deeper mucosa lining, whi...

Fundamental change to Immunology 101

...rom CLPs, as was widely assumed. "I had learned in class that T cells develop from CLPs," explains Schwarz. "The textbook figures would always show an early split in hematopoiesis between the lymphoid lineages [T cells, B cells, NK cells], developing from a CLP, and the myeloid lineages. This is a very ele...

Physics gravity model applicable to disease spread

...every two years. Measles belongs to an ecological class of disease that includes the traditional childhood... have contracted previous strains. "We now have a class of models that bears great promise in capturing the transmission of known childhood infections," say...

An exotic grass kills trees by hijacking their water

...ology of Sonoran desert plants. While working on a class project, Eilts noticed that, unlike other parts of the laboratory grounds, there were almost no palo verde trees within the patches of buffelgrass. Historic photographs taken by Ray Turner of the U.S. Geological Survey showed foothill palo verde tr...

Blood pressure hormone may inhibit growth of lung cancer

...od vessels, causing blood pressure to rise.A major class of blood pressure medications, called ACE inhibitors, work by reducing angiotensin II and increasing angiotensin-(1-7). Evidence from population studies in Scotland had suggested that people who were taking ACE inhibitors for high blood pressure had...

Newly designed nanoparticle quantum dots simultaneously target and image prostate tumors in mice

...sity scientists have for the first time used a new class of luminescent "quantum dot" nanoparticles in livi...dots from degradation and leakage." "This is a new class of quantum dot conjugates designed specifically for complex in vivo applications," said Dr. Nie. "T...

Insecticide resistance: A constraint on evolutionary change

... not only to control an organism's resistance to a class of pesticides but also to significantly influence the ability of an organism to evolve such resistance at all. Identifying such specific and strong constraints on short-term evolutionary change are likely to help ecologists and public-health experts ...

CBEN wins grant for undergraduate nanotech course

...n to develop the first introductory nanotechnology class to be offered at Rice University, a research-intensive institution known worldwide for its excellence in nanotechnology research. The course, titled "Nanotechnology: Content and Context," will be offered jointly by the departments of chemistry and an...

Study yields insights into precancerous condition

... Peutz-Jeghers Syndrome (PJS), and suggests that a class of drugs called mTOR inhibitors may be useful for the treatment of the condition, which has been linked to cancers of the gastrointestinal tract, lung, breast, uterus and ovaries. Caused by a mutation that inactivates the tumor suppressor gene, LKB1,...

Significant strides in small regulatory RNA research in plants

...re is growing evidence that they represent a major class of regulatory molecule having broad significance i...hanism of action of this fascinating and important class of regulatory molecule. ...

Altered expression of key developmental genes underlies evolution of butterfly wing patterns

... butterfly species report this week that a certain class of wing patterns has likely evolved through seemin...he timing of various types of gene expression. The class of wing patterns in question, so-called "intervein" patterns, have lines of symmetry halfway between...

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