Tag: "changes" at biology news

Scientists: As rainfall changes, tropical plants may acclimate

...nts in Hawaii have the ability to acclimate to big changes in rainfall in at least one important respect ?how...of many ingredients in plant life. Other unrelated changes that accompany a warming climate could still affect plant distribution and growth, such as those tha...

Genetic roots of bipolar disorder revealed by first genome-wide study of illness

...the shifts that occur in bipolar disorder, and the changes in behavior and energy level that accompany them, are sometimes disabling. Lithium and the other mood-stabilizing medications used to treat the condition help many patients. But some people do not respond to these medications, and clinicians ne...

Gene mutation linked to cognition is found only in humans

...tutive splicing contribute to the splicing pattern changes during primate evolution, suggesting a multi-step process eventually leading to the origin of the type II form in human," the authors state. They note that further studies should probe the biological function of type II neuropsin in humans, as the...

New Brandeis research sheds light on memory by erasing it

... hippocampus, where memory is stored in the brain, changes as memory is being stored. In this study, Lisman and his colleagues showed that they could saturate the memory stores. However, when CaMKII was chemically attacked and previous memory erased, it then became possible to insert new memories in the syna...

Fat screen delivers plant-derived chemical with antidiabetic effects

...nce are complex and are likely to involve not only changes in fat tissue differentiation and cell number but also changes in the fat cells' function, they said. ...

Study offers clues to 'Broken Heart Syndrome'

...ness of breath in 33 percent. All patients had ECG changes suggestive of an acute coronary syndrome, a term that encompasses both heart attack and unstable angina. Troponin-I, a blood test for heart damage, was positive in 95 percent of patients. Twenty percent of patients were unable to breathe on their own...

Hepatitis E takes a piggyback

...inst HEV, although Satou and Nishiura suggest that changes in husbandry practices and avoiding eating raw liver might be more cost-effective measures should HEV’s hold on pig farms weaken....

Asexual worm quickly adapts to soil contamination

... of the population but it can also lead to genetic changes and adaptations. Doroszuk investigated the long-te...t adaptation was observed and considerable genetic changes took place. As a result of this the nematodes in the polluted soil became resistant to the contamina...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...atterns of activity, which are part of the regular changes that occur in the course of a day, called circadia...s circadian gene activity, was responsible for the changes seen in the sick flies. But the behavior of the ill flies looked a lot like that of flies known to h...

Palau's coral reefs show differential habitat recovery following the 1998 bleaching event

...rs such as river pollution, sedimentation, and use changes ?such as fishing pressures ?are all controllable factors," says van Woesik. "They’re added to global effects of greenhouse gas emissions that affect climate change. The take-home message is that we can accelerate the recovery rate of coral reefs by a...

Female-led infanticide in wild chimpanzees

...ith dependent offspring since 2001. The population changes resulted in a highly skewed male:female sex ratio of 1:3, with relatively few males available to increase the home range. According to the authors, the new findings indicate that although low-level aggression between female chimpanzees is more com...

Chemical maps hint at drug's effects on schizophrenia

... is characterized by hallucinations, delusions and changes in outlook and personality. Currently there are no...ommunicating information in the brain. These lipid changes were partially reversed in patients treated with antipsychotic medications, said Joseph McEvoy, M.D....

Herpes infection may be symbiotic, help beat back some bacteria

... in St. Louis attributed the surprising finding to changes in the immune system triggered by the long-term presence of a latent herpes virus infection. In latent viral infections, the virus is present for the lifetime of the host in a relatively quiescent form that does not cause overt symptoms. While pre...

Effect on breast tumors of DNA alternations in 3 genes described

... "In addition, it is now becoming clear that other changes in the DNA may also contribute to the development of cancer." The researchers analyzed methylation status in three genes, known as E-cadherin, p16 and retinoic acid B2 receptor (RAR-B2), using tissue samples from 887 breast cancers. The samples w...

The quest for an effective HIV vaccine presents new possibilities, challenges

...antibodies is stymied because of the rapid genetic changes that occur in HIV’s outer envelope protein, which allow the virus to escape detection. While early efforts to develop an HIV vaccine focused on the viral envelope, an improved understanding of how HIV causes disease has brought increased attentio...

Scientists seek useful traits in wild cottons

...es are flexible enough genetically to handle minor changes but lack enough diversity for really spectacular change. Aside from limiting fiber quality and yield potential, narrow genetics makes them more susceptible to insects and disease." Gannaway and other scientists believe future progress in cot...

Scientists discover new life in the Antarctic deep sea

...on of the marine species and how they can adapt to changes in climate and environments." Dr Katrin Linse, marine biologist from British Antarctic Survey, says, "What was once thought to be a featureless abyss is in fact a dynamic, variable and biologically rich environment. Finding this extraordinar...

Latent memory of cells comes to life

...nge occurs to the DNA, either large or small. Such changes are at the origin of the immense and varied animal and plant life on earth. Constructive changes in the DNA, that is, changes creating new functions, normally arise by a slow and gradual process th...

Study shows dramatic increase in Caesarean sections

...h at the University of Western Australia, said the changes over the 20 year period in both elective and emergency caesarean suggest that they are the result of common unmeasured factors acting throughout the whole community. " The reasons are likely to be multifactorial and reflect a complex social proces...

Sleep quantity affects morning testosterone levels in older men

...a person sleeps may be an indicator of age-related changes in important hormone signals in the body, future studies are needed to determine the importance of these relationships for the health of older adults." Recent studies associate lack of sleep with serious health problems such as an increased risk o...

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