Tag: "turnover" at biology news

When sun's too strong, plankton make clouds

...iegel were surprised by the lightning-fast rate of turnover for DMS. To give an example for comparison, when carbon dioxide gets into the atmosphere where it acts as a greenhouse gas and traps heat, it may last for decades. Toole adds that the cycles that break down DMS scream along at these very fast rates, ...

Milk consumption and calcium intake associated with lower colorectal cancer risk

...calcium supplementation on colonic epithelial cell turnover and colorectal adenoma recurrence, support the concept that moderate milk and calcium intake reduces the risk of colorectal cancer," the authors write....

Biogeosciences.org launches

...st developments, research, and hot topics. A quick turnover rate helps visitors easily stay abreast of the most current biogeoscience information. Interested parties are encouraged to visit the Web site and sign up to receive periodic electronic updates on hot topics and important announcements from Biogeosc...

Dartmouth Medical School awarded $9 million grant for genomics research

...use disease, manufacture medicine and most biomass turnover on the planet requires filamentous fungi. This grant represents a wealth of promising research opportunities and we look forward to understanding the gene expression of this potentially groundbreaking genetic model. The results of this study will p...

A multi-institutional study may offer clues for the treatment of some autoimmune diseases

...erences in the dGuo pools due to variation of cell turnover in these individuals. The plasma terminal half-life of BCX-1777 was 11.7 hr, but the half-life of the inhibition of erythrocyte PNP was much longer. In vitro experiments indicated that it might be as long as five days. During and 7-10 days followin...

A new hypothesis about autoimmunity. Is it possible to be too clean?

...hat Sarvetnick terms insidious division. The high turnover of T cells presents a selective pressure that favo...ften lost. Diabetes develops when there is a rapid turnover of T cells, and the resulting T cell population targets insulin-producing beta cells. The Benefits...

Geoenvironmental researchers to join Technium

...companies, new jobs and significantly increase the turnover in assisted companies. Last year it set up a number of working groups to identify key concepts that could be taken from initial ideas through to commercialisation, several new and exciting products emerged which utilised key waste stockpiles in Wales...

Just how much water do we really need? The answer may depend on our age

...iologists for decades to objectively measure water turnover in wild animals. The procedure begins with a bolu...labeled water dilution provides a measure of water turnover (input and output) per unit of time. A New Study A new study combined data from two studies in he...

JCI table of contents, February 2, 2004

...in mammals. TITLE: Glycoprotein 130 regulates bone turnover and bone size by distinct downstream signaling pathways AUTHOR CONTACT: Natalie A. Sims The University of Melbourne, Fitzroy, Victoria, Australia. Phone: 61-3-9288-2555 Fax: 61-3-9288-2581 E-mail: nsims@medstv.unimelb.edu.au View the PDF of this ar...

Teenage pregnancy may put girls at risk for osteoporosis

...cterizing the rates of calcium absorption and bone turnover in adolescent pregnancy, this study was a critical first step towards new recommendations to insure that girls get adequate calcium to prevent or minimize losses and avert any detrimental, long-term effects on bone growth," said Dr. O'Brien....

'Snowbirds' versus real birds

...orth of Kingston, Ontario in the spring. Since the turnover time of the blood cells is from six to eight weeks, they provide a good indicator of the quality of the birds' previous habitat on the wintering ground. The carbon signature of each redstart has been deposited by insects the bird ate, and the insects...

JCI Table of Contents, November 3, 2003

...ed by the lactating mammary gland to regulate bone turnover during lactation. Wysolmerski and colleagues desig...ting mammary glands resulted in reductions in bone turnover and attenuated bone loss during lactation. This study suggests that during lactation, mammary epithe...

New scheduling method raises efficiency of electronics recycling

... office and kitchen electronics - and she used the turnover rate of products in the staging space as a key measurement, or metric. To determine which objects to move first, she created a technique in which the average size of a product family is divided by the time it takes to begin processing that product. "...

JCI Table of Contents, September 15, 2003

...infection was associated with a high rate of virus turnover and short lifespan of infected cells. This suggest...ive technique for measuring the dynamics of T cell turnover in 3 groups of individuals: (i) HIV-infected; (ii) HIV-infected HAART-treated; and (iii) uninfected....

A new support forum for small-to-medium enterprises

...prises with fewer than 250 employees and an annual turnover not exceeding 50 million Euros or an annual balance-sheet total not exceeding 43 million Euros). But these lean, mean companies lack many of the support networks that are taken for granted by larger companies. For example, practically every small b...

Fears of second-hand smoke confirmed

...al and functional molecules and modulation of cell turnover play a major role. One study has hypothesized that cigarette smoke may act by decreasing the expression of vascular endothelial growth factor (VEGF) and its type 2 receptor, thus resulting in lung septal endothelial cell death. Because fibroblasts (s...

Free shuttles can close the grocery gap

...stry cites higher security costs, greater employee turnover and a bigger shrink factor (theft) in high-poverty neighborhoods. According to Cassady, loss and retrieval of shopping carts -- often used as wheels by people without cars -- can cost a small grocery-store chain $300,000 a year.For shoppers, the groc...

Alcohol abuse may increase susceptibility to HIV infection

...lls." Alcohol consumption also enhanced lymphocyte turnover (as assessed by expression of the cell cycle protein marker Ki67) in SIV-infected monkeys during the early stage of infection, which may have contributed to the observed increase of virus in the blood. When a body becomes infected with a pathogen ...

Mechanism controls movement of cell structures

...sm worked and then we also discovered this protein turnover mechanism, which seems to be critical for depositing the cargo at the right place and time," Weisman said. Because the organelle transport system in yeast is essentially the same as the system found in higher animals including humans, the researchers...

How the nose knows a rose-or a mate

...brain can retain memories of smells, despite rapid turnover in the sensory neurons that inhabit the nose. Katz notes that the one of the next breakthroughs in the science of the olfactory system will allow scientists "to unravel the links between olfactory perception and the formation of long-term olfactory ...

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