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Tag: "behavior" at biology news

Successful lung cancer surgery not enough to break nicotine dependence in many smokers

...so you cannot assume they will easily change their behavior simply because they have dodged this particular bullet," said the study’s lead author, Mark S. Walker, Ph.D., a clinical psychologist and Assistant Professor of Medicine at Washington University. "Their choices are driven by insidious cravings for ni...

Queen bee promiscuity boosts hive health

Though promiscuity may be risky behavior for humans, it's healthy for honeybees: Queen honeybees who indulge in sexual surfeits with multiple drones produce more disease-resistant colonies than monogamous monarchs. According to a new Cornell study published in the Jan. 7 issue of the Proce...

A fisheye view of the deadliest breast cancer

...to work as a real-time study window into IBC tumor behavior and as a rapid screening system for anticancer drugs. In the race against aggressive breast cancers, Stoletov and colleagues see their xenografted, genetically engineered zebrafish as a potential front runner. ...

Male circumcision reduces HIV risk, study stopped early

... suggests that circumcision did not increase risky behavior among circumcised or uncircumcised men, according to Bailey. "Both uncircumcised and circumcised men are reducing their sexual risk behavior," he said, "which indicates that our counseling is doing some good." The study also evaluated the safe...

Altered perception of reward in human cocaine addiction

...interplay between reward processing and control of behavior observed in these studies could help to explain the chronically relapsing nature of drug addiction," Goldstein said. "Our results also suggest the need for new clinical interventions aimed at helping drug abusers manage these symptoms as part of an e...

Mass vaccination unnecessary in the event of a large bioterrorist US smallpox attack

...disease manifest over time ?with human patterns of behavior to construct the most-comprehensive model of a smallpox epidemic to date. "If smallpox appeared in Seattle tomorrow, which it could do, I'm absolutely confident that we could contain it if our recommendations for surveillance and containment were...

High HPV concentrations combined with smoking significantly raise risks of cervical cancer

...human papilloma virus (HPV). The virus and smoking behavior have long been associated with the disease, but no...ols. For these women, they compared their smoking behavior with concentrations (known as viral load) of HPV-16, the viral strain most associated with cervical ...

Newly discovered behavior in cancer cells signals dangerous metastasis

...s validate that tumors are highly complex in their behavior and don't necessarily need a gene mutation to alter their behavior," said Sebastian Oltean, M.D., Ph.D., research associate and first author of the journal article. "Alterations in gene splicing can be much more subtle in nature but still have a ma...

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

...les. The same gene directs another sex-specific behavior ?fighting patterns, the new study shows. Female fi...cting like females, either. (Ultimately, courtship behavior is constrained by pheromones and anatomy, which do not change.) He contacted Kravitz, hoping that ag...

Patients can report statins' adverse effects on new web site

...evaluate the effects of statin drugs on cognition, behavior and serotonin biochemistry. According to Golomb, among people who have contacted the UCSD Statin Study to report adverse effects, nearly 60% of patients reported muscle weakness or fatigue, and about half reported cognitive problems. "We believe i...

Uniform tungsten trimers stand and deliver

...tals ?holds promise as a platform for studying the behavior of early transition metal oxides. White noted, "While we have created the smallest nano-cluster of a uniform size you can imagine, it is a real oxide. The tungsten is in its normal oxide state. In principle, you have all the things needed to make bon...

Male chimpanzees prefer mating with old females

...ndings uncover a stark contrast between chimpanzee behavior and that of humans, their primate cousins. The basis for this difference may lie in the fact that whereas chimpanzees participate in a relatively promiscuous mating system, humans form unusually long-term mating bonds, thereby making young females mo...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

...Gr66a is crucial for the normal caffeine avoidance behavior and without it, flies are seemingly indifferent to...nderstand the biochemistry behind caffeine-induced behavior in other organisms, namely humans. ...

Innovative movies show real-time immune-cell activity within tumors

...ad been destroyed, we saw a dramatic change in the behavior of the activated T cells. They began to migrate ac...r cells, and could not sustain an active migratory behavior within tumors." "There are several significant conclusions from these experiments," Weninger says....

Paramecia adapt their swimming to changing gravitational force

...or down, the researchers could change the swimming behavior of the paramecia dramatically. In high gravity, the organisms swam upward mightily to maintain their place in the water column. In zero gravity, they swam up and down equally. And in reverse gravity, they dove for where the sediments ought to be. "I...

Changing length of days reverses how estrogen affects aggressiveness in mice

...ound that estrogen has totally opposite effects on behavior in these mice depending only on how much light the...s. "So the differences in how estrogen affected behavior in long days compared to short days could not be explained by the hormone using different receptors ...

Temperament linked to onset of cancer and early death in female rats

.... "Human studies may need to consider more basic behavior traits than those already considered," McClintock ...evelopment, the team suggests. The links between behavior traits and cancer in rats are striking, the scholars found. "This is the first evidence that infa...

Fruit fly aggression studies have relevance to humans, animals

...ritability, or genetic contribution to, aggressive behavior was about 10 percent. The other 90 percent had to be attributed to environmental variation. "This is definitely not genetic predeterminism," Mackay said. "It's a susceptibility. Even in flies, in the constant environment in which we grow them, the e...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

...ly attacking and eating foreign bodies, which is a behavior that, according to the current dogma, just shouldn't happen in B cells," said J. Oriol Sunyer, a professor in Penn Vet's Department of Pathobiology. "I believe it is evidence for a very real connection between the most primitive forms of immunologic...

Humpback whales have brain cells also found in humans

...ces may indicate differences in brain function and behavior in aquatic species that are not yet understood. ...work for further investigations into the brain and behavior of cetaceans, which are naturally elusive, poorly documented and often endangered....

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