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Tag: "decrease" at biology news

Salty oceans provide early warning for climate change

...o kick start circulation,” says Zahn. Meanwhile, a decrease in saltiness in South African waters could be linked to a slowing down of the North Atlantic circulation. Models and data both indicate that these changes in ocean circulation occur over very short time-scales, usually in less than a decade or two...

Rising skin cancer rates are more likely to affect wealthy people, says 12-year review

...e exception of malignant melanomas, which showed a decrease in men aged 75 and over. “And there was a link between more patients living in wealthier areas and increased levels of malignant melanomas and basal cell carcinomas.” The team looked at data collected by the Northern Ireland Cancer Registry, at...

Weizmann Institute scientists develop a general 'control switch' for protein activity

... genetic manipulations to increase or, conversely, decrease the production of a certain protein, but existing manipulations of this sort are complicated and do not fully meet the researchers’ needs. Prof. Mordechai “Moti” Liscovitch and graduate student Oran Erster of the Weizmann Institute’s Biological Regu...

Restricting hospital-based services during SARS outbreak had modest impact

...tals in the Greater Toronto Area resulted in a 12% decrease in admissions. The findings suggest that the abili...levels of hospital occupancy. For example, the 12% decrease in overall admissions seen during the SARS restrictions would only offset one-quarter of the number ...

Focused ultrasound relieves fibroid symptoms in women

... tissue, which results in a significant, sustained decrease in symptoms for up to 12 months," said the study’s lead author, Fiona M. Fennessy, M.D., Ph.D., assistant professor of radiology at Harvard Medical School and staff radiologist at Brigham and Women’s Hospital in Boston. Uterine fibroids are benig...

Pistachios lower cholesterol, provide antioxidants

...t pistachios, eaten with a heart healthy diet, may decrease a person's CVD risk profile," says Dr. Penny Kris-Etherton, distinguished professor of nutrition and primary investigator of the study....

Peramivir protects mice from lethal H5N1 infection

...virus replication in the lungs and spleen, but did decrease the spread of virus to the brain. "Peramivir s...iven as a preventive measure during an outbreak to decrease the risk of infection," he said. Boltz is first author of a paper, which was presented April 30 at t...

Nitric oxide: Key to cardiovascular and pulmonary function and drug effectiveness

...chers found that a lack of nitric oxide leads to a decrease in beta adrenergic receptor number and function. Also, the researchers found that when SNO compounds were administered to mice they could prevent the receptors from being "turned off" by the drugs. The researchers said these findings, if confirmed...

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

...d and cultivated garlic preparations were shown to decrease systolic blood pressure in rats. Conclusions In this study Tulbaghia violacea has shown properties related to lowering blood pressure. Since the number of hypertensive individuals around the world is on the rise, it is worthwhile to pursue f...

Targeting sugar on blood vessels may inhibit cancer growth

...fying enzyme (Ndst1), the researchers saw a marked decrease in the growth of experimental carcinomas. The Ndst1 enzyme is responsible for modifying the molecular structure of a sugar called heparan sulfate. In endothelial cells, this sugar facilitates the action of several important vascular growth factors...

Slowing the racing heart

...ce a rhythmic heartbeat that varies to increase or decrease the blood flow to the body as we eat, sleep or exercise. "Disturbances of pacemaker control are common in heart diseases. When the heartbeat becomes non-rhythmic and chaotic, it can result in fatal arrhythmias and stroke," said R. John Solaro, UI...

Sleep quantity affects morning testosterone levels in older men

...et older. As sleep quality and quantity typically decrease with age, objectively measured differences in the amount of sleep a healthy older man gets can affect his level of testosterone in the morning, according to a study published in the April 1st issue of the journal SLEEP. The study, conducted by Plame...

Revealing the machinery underlying the 'plastic' juvenile brain

...osure of the critical period was associated with a decrease in the ability of visual experience to drive the histone modifications that are necessary for neural rewiring. The researchers concluded that the mechanism they discovered "might be important for plasticity in the visual cortex during the critical...

NIAID expands capability for influenza research and surveillance

... will examine how human genes might be silenced to decrease or eliminate flu infections; identify new targets for antiviral medicines; and evaluate flu transmission between patients and physicians in the hospital emergency room setting. Emory will also offer a training program for postdoctoral fellows and vet...

New success in engineering plant oils

...hening by reducing the levels of KASII, they could decrease the likelihood of desaturation and increase the level of saturated fats in the plant seeds. Their hypothesis was supported by the fact that scientists had previously identified a plant with a mutated KASII that showed reduced enzyme activity, and ...

In obesity, brain becomes 'unaware' of fat

...nd fatter and leptin increases, SOCS-3 may rise to decrease the signal. It seems that in obesity, SOCS-3 might end up overriding the [leptin] signal completely.? When the amount of fat in the animals?diets was reduced—even without any reduction in calories—the mice continuously lost weight until they reache...

Mutation improves memory, may lead to memory-enhancing pill

...the notion that, under physiological conditions, a decrease in eIF2a phosphorylation constitutes a critical step for the activation of gene expression that leads to the long-term synaptic changes required for memory formation," the researchers concluded. "These findings also raise the interesting possibility ...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...cannot be underestimated: "Even a relatively small decrease in birth weight is likely to have an amplified negative effect on male reproductive fitness in species where competition amongst males for mates is very high." The saiga antelope provides scientists with an ideal opportunity to investigate the eff...

Remote sheep population resists genetic drift

...the genetic diversity of an inbred population will decrease over time. "What is amazing is that models of genetic drift predict the genetic diversity of these animals should have been lost over time, but we've found that it has been maintained," said Dr. David Coltman, an evolutionary geneticist at the Uni...

Gene variations contribute to aggression and anger in women

... that increased serotonin activity is related to a decrease in angry and aggressive behaviors. In the study being presented today, researchers sought to determine if this relationship was genetically determined. The study is the first to look at the relationship between variations in the serotonin receptor 2C...

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