Tag: "low" at biology news

Gulf of Maine marine ecosystem may have entered new phase

...created areas known as "urchin barrens" where only low growing algae could survive. In turn, the ...e." For the first time, adds Steneck, the low diversity of marine organisms, including Maine's fabled groundfish, have left the system too reliant...

JCI table of contents, 2 August, 2004

...rotein level. Rats that were starved, and thus had low levels of leptin in their blood serum levels also had lower levels of these two enzymes. Consistent with the lower levels of the enzymes, these fasted rats likewise did not have a significant amount of the active (cleaved form) of thyrotopin-releasin...

Leptin has layers of control

...otein level. Rats that were starved, and thus had low levels of leptin in their blood serum levels also had lower levels of these two enzymes. Consistent with the lower levels of the enzymes, these fasted rats likewise did not have a significant amount of the active (cleaved form) of thyrotopin-releasin...

New technique helps scientists reveal interactions between genes and drugs

...ed by higher numbers of cell deaths in response to low drug doses. The robot also highlighted cell lines ...otherapy may be able to be treated with relatively low doses, reducing side effects. Patients whose cells are particularly resistant may need special or ad...

Study: Mothers turn fearless when peptide level drops

...aid when it comes to protecting their young may be low levels of a peptide, or small piece of protein, re...y, only the mice that received either no dose or a low dose of the peptide displayed the expected behavior. As the levels of CRH increased, the number of a...

Lake research offers clues to managing crayfish invasions

...y substrate crayfish call home - can have either a low or high abundance of these invaders. Donning his ... had a high abundance of the invasive species, but low abundance of bluegills and plants, Wild Rice Lake showed the opposite. The preliminary findings, say...

Two-pronged attack targeting EGF receptor hinders cancer cell growth

...dermal growth factor receptor (EGFR) both high and low with a combination of drugs for targeted cancer therapy curbs cancer cell growth more effectively than using the drugs each by themselves, researchers from the University of Wisconsin-Madison reported in the August 1 issue of the journal Cancer Rese...

Save the rainforest - eat a tree

...st by making it impossible for red clay trees with low defenses [against insects] to live in poor white sand soils." Coley says: "Most people think of herbivores as detrimental pests bugs eat plants, which is not good for the plants. Yet without insects, clay tree species would take over all fore...

U of T research answers key question in biochemistry

...ard to study them because they are present at such low levels. This is the first time we have been able to characterize an intermediate state at this level of detail." Using nuclear magnetic resonance (NMR) spectroscopy, the researchers obtained data that allowed them to develop crude pictures of...

Virtual counselor supplements traditional genetic counseling

...f breast cancer and genetic testing among women at low risk for breast cancer. Counselors were, how...r. Women were divided into two risk groups, low and high. "Low" was defined as having a less than 10 percent chance of carrying the BRCA1 or BRCA2 m...

Scientists build on case connecting inflammatory disease and depression

... For about 30 years, depression has been linked to low levels of serotonin, a brain chemical that regulates mood. Drugs called selective serotonin reuptake inhibitors (SSRIs) such as Prozac ease depression by elevating serotonin levels. "Although SSRIs can be used to treat immunotherapy-induced depress...

Researchers review evolutionary history of modern algae

...ern phytoplankton began to form at a time when the low oxygen conditions characterized much of the world's oceans. Since a cyanobacterium was capable of producing oxygen and nutrients, another bacterium, or a one-celled organism, ate the cyanobacterium, kept a part of the cyanobacterium undigested, and l...

Ocean scientists assess impact of seismic pulses in effort to protect whales

... models had overestimated the deep water impact of low frequency sound waves, while underestimating their impact in shallow water. This, they say, is because reverberations play a significant role in received sound levels in shallow water, which had not previously been incorporated into the models. Durin...

FDA approves VYTORIN, first and only to powerfully reduce LDL cholesterol through dual inhibition

...e or verapamil. VYTORIN was well tolerated with a low incidence of adverse events VYTORIN has been evaluated for safety in more than 3,800 patients in clinical trials and was generally well tolerated at all doses (10/10 mg, 10/20 mg, 10/40 mg, 10/80 mg). In clinical trials, the most commonly reporte...

Plant respiration not just an evolutionary leftover, study shows

...o elevated levels of atmospheric carbon dioxide or low levels of oxygen -- both conditions that inhibit photorespiration -- nitrate assimilation in the plant's shoot slows down. Eventually, a shortage of nitrogen will curtail the plant's growth. "This explains why many plants are unable to sustain rapi...

Healthy fats and oils essential to satisfy calorie-conscious consumers

...sweeteners with corn syrup. Corn syrup spreads are low in fat and calories and they do not compromise on the flavor. Peanut butter is also extremely high in calories since about 50 percent of it is oils while the rest is solid nut particles. Partly replacing nut solids with corn syrup solids creates a mo...

Antimalarial substances found in New Caledonian sponges

...ction is that, in vitro, it is accompanied by very low cytotoxicity. These components therefore hold potential as material for the elaboration of antimalarial medicines with new types of structure. Other investigations are planned to seek confirmation of these results and find out accurate information on...

West Nile takes its toll on rare bird

... of Science. "The immunity appears to be extremely low for sage-grouse, which means it is going to take much longer for the population to develop resistance to the virus and to survive, if they are indeed capable. We don't know how long small populations like those found in Alberta or Saskatchewan can su...

Reading hexametric rhyme supports cardiac synchronization, especially after a heart attack

...aled: (1) during recitation of hexameter verse the low frequency oscillations of the breathing pattern were synchronized to a large extent with the heart rate oscillations; (2) the cardiorespiratory interaction was also synchronized during the controlled breathing exercise, but to a slightly lesser exten...

Was Atkins right?

...rance. As the isocaloric exchange between high and low protein diets was performed on carbohydrate, the flattening effect of the high protein diet on insulin and glucose basal levels could be attributed to its reduced carbohydrate content. This contrasts with the results of many studies that have acknowl...

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