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Tag: "low" at biology news

How the environment could be damaging men's reproductive health

...hus, the recent findings of good semen quality and low frequency of testicular cancer in Lithuania may re...tudy found that cryptorchidism was associated with low birth weight, preterm delivery, small gestational weight and other congenital abnormalities of the g...

Scientists discuss improved biopesticides for locust control in West Africa

...n said. "The persistence of base biopesticides is low in the environment because of degradation from sunlight," Agblevor said. "We have developed coating technologies to improve on the environmental persistence of the biopesticide, specifically a lignin coating for the spores, which increases their resi...

World-first Living Donor Islet Cell Transplant A Success; Procedure Offers Promise For Diabetics

... the surgery, the woman had been subject to severe low blood sugar coma attacks, and her glucose control has been transformed by the transplant. Related Web Site: http://www.med.ualberta.ca/islet ...

Norovirus, AIDS vaccine and Hepatitis Virus

... for treatment. The have the advantages of safety, low cost of production, and ease of use in field conditions due to their minimal need for refrigeration. In the study the DNA of a simian/human immunodeficiency virus (SHIV) was made noninfectious by removing the gene that makes reverse transciptase (a ...

Dead zone area in Gulf could be increasing, researchers say

...ulf of Mexico ?a region that annually suffers from low oxygen which can result in huge marine life losses...s the dead zone." Hypoxia is a term for extremely low levels of oxygen concentrations in water. Hypoxia can result in fish kills and can severely impact o...

Liposome finding implies electrical effect on cell development

...d liposomes in a droplet of water and applied very low electric fields (5-10 volts per centimeter), much lower than the fields present in operating neurons (a fraction of a volt but operating over a very short distance--less than a micron--to produce a field up to one thousand times stronger). In images ...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

... of other remote methods capable both of detecting low levels of micro-organisms and visualizing high levels incorporated as biofilms or colonies," said Gregory Fisher, project imaging scientist. "Our fluorescent imager is the first such system to work in the daylight while in the shade of the rover. Th...

Reducing malarial transmission in Africa

...n in several African countries, largely due to its low cost. Altogether, the six-dose regimen of co-artemether was highly effective at reducing whether and how long children had gametocytes - the infective form of the malarial parasite - in their blood. The numbers of gametocytes carried and how able the...

Discovery Promises Simpler Therapy for Sickle Cell Disease

...ild sickle cell disease dilate blood vessels under low oxygen conditions, but to a lesser extent than normal red cells. In contrast, red cells from those with severe disease symptoms cause blood vessels to constrict when oxygen levels drop, they found, a response which would further exacerbate the oxygen...

Low level of extinction during ice age linked to adaptability

...y have figured out why rates of extinction were so low for many of the major groups of marine life during...ckled the question of why extinction rates were so low during that great ice age by closely examining geographic patterns of evolution and extinction in br...

Increased risk of osteoporosis associated with gene that one in five people have

...p the breakdown of estrogen and is associated with low density in the bones of the hip. The study will b...breaks down estrogen faster than usual, leading to low serum estrogen levels and high levels of estrogen metabolites," Villareal says. "Low levels of estro...

Stopping smallpox in its tracks: A new anti-viral approach

... Medical School propose a new antiviral therapy ?a low molecular weight inhibitor of signaling mediated by the smallpox growth factor (SPGF). SPGF targets the erbB-1 signaling molecule, which normally initiates an intracellular cascade that facilitates viral replication. This study shows that drugs tha...

New drug shows promise as powerful anticancer agent

...or of human tumors in a mouse model system and has low toxicity. The results of this study have led to clinical evaluation of this compound in phase I clinical trials. Plk1 is a molecule that plays a key role in driving cell division. High levels of Plk1 have been observed in many human tumors, and stud...

Scientists identify molecule that regulates well-known tumor suppressor

...PTEN suppressor. In studies with mammalian cells, low levels of DJ-1 correlated with decreased PKB/Akt activity, while increased DJ-1 led to activation of PKB/Akt and enhanced cell survival. In cancer cells from breast cancer patients, elevated PKB/Akt activity and reduced PTEN expression were associate...

Buying Time Through Hibernation on Demand

...e dropped from the normal 37 degrees Celsius to as low as 11 C, depending on the controlled ambient temperature within the chamber. "We have, on demand, reversibly demonstrated the widest range of metabolic flexibility that anyone has ever seen in a non-hibernating animal," Roth said. "The cool thing a...

U-M team recovers ancient whale in Egyptian desert

...e dropped from the normal 37 degrees Celsius to as low as 11 C, depending on the controlled ambient temperature within the chamber. "We have, on demand, reversibly demonstrated the widest range of metabolic flexibility that anyone has ever seen in a non-hibernating animal," Roth said. "The cool thing a...

Solutions that reduce death of marine life reeled in by International Smart Gear Competition

...le, but bycatch of juvenile fish and shrimp are of low commercial value and threaten future populations and catches. According to the U.N. Food and Agriculture Organization, fishermen lose hundreds of millions of dollars a year because of the loss of juvenile fish and non-target fish to bycatch. This tea...

Super predators and mass extinctions

...eriods between super predators. For a sufficiently low mutation rate, the model can lead to cycles that correspond to our 26 million year mass extinctions. Previous models that do not show these sorts of cycles could be faulty, according to Lipowski, because they failed to account for the effects of lim...

NASA study finds snow melt causes large ocean plant blooms

...NCE magazine When winter and spring snow cover is low over Eurasia, the amount of solar energy reflected...isparity in pressure over land and sea, creating a low pressure system over the Indian subcontinent and a high pressure system over the Arabian Sea. This d...

Defenseless plants arm themselves with metals

...y on and off as needed. Most plants maintain very low levels of salicylic acid in their tissues unless t...f salicylic acid, most plants normally have fairly low glutathione levels and, consequently, can't tolerate metals. Thlaspi, on the other hand, is brimmin...

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