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Tag: "sometimes" at biology news

New brain-chemistry differences found in depressed women

...d alterations in hormones, like cortisol, that are sometimes over-secreted in depression," Zubieta explains. "I...n chemicals called mu-opioids bind to. Mu-opioids, sometimes also called endorphins, reduce or block the spread of messages related to pain, stress and emotional...

Road-crossing in chimpanzees: A risky business

...ers have been lacking. Crossing of man-made roads, sometimes necessitated by intersection with longstanding chimpanzee travel routes, presents a new situation that calls for flexibility of responses by chimpanzees to variations in perceived risk. Understanding how chimpanzees cross roads as a group would help ...

Gene-bender proteins may sway to DNA

...e" Structural changes in both the protein and DNA, sometimes with the DNA within the complex kinked or sharply bent, allow for the specific contacts needed for a tight DNA-protein fit. Scientists think DNA is largely passive in this genetic tango. But new findings by Anjum Ansari, associate professor of bio...

Memories: It's all in the packaging, scientists say

... the memory. The research may help to explain why sometimes people only recall parts of an experience such as a car accident, and yet vividly recall all of the details of a similar experience. In experiments using functional magnetic resonance imaging (fMRI), the scientists were able to view what happened ...

First major study of mammalian 'disorderly' proteins

...s have varying amounts of flexibility within their sometimes spaghetti-like structures that is critical for function. For example, one protein named p27 initially looks like a Slinky TM toy. However, when p27 goes to work, it puts a vise-like grip on an enzyme that otherwise would promote uncontrolled cell di...

Powerful genome ID method extended to humans

...big differences in their chromosome structure. You sometimes find regions where there are larger changes." Such changes could include wholesale deletions of chunks of the genome or additions of extra copies. Cancer genomes, in particular, mutate rapidly and contain frequent abnormalities. "That's somethi...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...a live in these shallow waters, where temperatures sometimes approach the boiling point. Rogers found that there were more than twice as many archaeal species at relatively moderate temperatures of 59 C (38 F) than at hotter vents where the thermometer reached 94 C (201 F). Climate change Three AGU pre...

Artificial cornea offers better results for infants, some blind patients

...e. All 15 of those children recovered some vision, sometimes remarkably so, and none had an infection or a problem with the implant. In the seven cases where the child was 4 years old or older and could explain to some degree how much he or she could see, every child could at least see fingers held at an arm's...

A new target for painkillers

...athic pain. Morphine-like opiods such as oxycodone sometimes are used, but can cause constipation, nausea and a spaced-out feeling. Anticonvulsant drugs for epilepsy sometime are used to reduce the pain by decreasing nerve cell excitability, but have side effects such as lethargy, fatigue, clouding of ment...

Did 'ABCs' cause Uganda's fall in HIV rates?

...l counterparts. Nevertheless, the ABC approach is sometimes credited as being responsible for Uganda's dramatic decline in HIV rates. A provocative debate in PLoS Medicine considers the two sides to the question of whether the ABCs are helpful or harmful in the battle to control the HIV pandemic. Elaine Mur...

Most important actors in the growth process of neurons identified

...ervous system are a delicate system, something can sometimes go seriously wrong and a brain or nerve disease ap... of information transfer in the nervous system can sometimes be more than a meter long. The axon's orientation as it grows is also of great importance in forming...

Hope for a more effective and less toxic cancer drug

...mpt to kill rapidly dividing cancer cells. This is sometimes successful in halting the disease, but these drugs inevitably damage many normal tissues. Hence, even when the chemotherapy works, the side effects for the patient can be very serious. ABT-737 is a drug with a different strategy for attacking can...

Exposure to dioxins influences male reproductive system, study of Vietnam veterans concludes

...to urinate and urinary tract infection. Surgery is sometimes needed. Dr. Claus Roehrborn, professor and chairman of urology at UT Southwestern and a study author, said, "We know that dioxin causes many endocrine disturbances in the human body. The study indirectly proves that BPH is an endocrine disorder." ...

Fighting like a girl or boy determined by gene in fruit flies

...issing the proteins do not court females, and they sometimes court males, other research groups have shown. Females with a male version of the gene perform the male courting ritual with other females. The same gene directs another sex-specific behavior ?fighting patterns, the new study shows. Female fightin...

Fruit fly aggression studies have relevance to humans, animals

...tiny, mild-mannered fruit fly can be a little mean sometimes ?especially when there's a choice bit of rotten fruit to fight over. And, like people, some flies have shorter tempers than others. Researchers in the North Carolina Sate University genetics department have identified a suite of genes that affect a...

Tuberculosis: The bacillus takes refuge in adipose cells

...ation, remaining in a "dormant" state in the body, sometimes for years, and may be "reactivated" at any time. The risk of rea ctivation is particularly high in immunocompromised individuals, such as those infected with AIDS: the HIV virus and the tuberculosis bacillus make a formidable team, with each infectio...

Renewed dolphin slaughter prompts new campaign

...onducted by groups of fishermen who herd hundreds, sometimes thousands, of dolphins and small cetaceans into shallow bays by banging on partially submerged rods that create a sonic barrier. The dolphins are then corralled into nets and dispatched in a brutal manner: speared, hooked, hoisted into the air by the...

Sandia research to focus on early detection of harmful algal blooms

...the food web. The dense patches (or "blooms") that sometimes accumulate near the surface of the water, however, can produce potent neurotoxins that are then transferred through the food chain, accumulating in zooplankton and shellfish, eventually harming or even killing marine mammals and humans that consume t...

Trotting with emus to walk with dinosaurs

...tern seen at Red Gulch. Researchers had found that sometimes a dinosaur's tracks became crossed ?that is, the left foot crossing over the right and the right crossing over the left. That seemed pretty strange and hard to explain on the face of it. But after watching emus, it became clear that the crossing over...

Important gene controlling tree growth and development found

...their first flower until they are 10-20 years old, sometimes even older! Trees also have the ability to cycle between growth and dormancy. This is a way to adopt to harsh winter conditions when the supply of water is low and the tree might be damaged from both drought and cold. The trees have adopted to these ...

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