Tag: "male" at biology news
Alcoholics with antisocial personality disorder have blunted emotional reactivity
...pleasant events. New research has found that adult male
alcoholics with antisocial personality disorder (A...bnormally low emotional responsiveness among adult male
alcoholics with antisocial personality disorder (ASPD). Study authors say these findings may reflec...
Mouse embryonic germ cells and male gametes created in the lab
...in the Petri dish. In a second step, they created male
gametes that were capable of fertilizing an egg to... other side of the reproductive equation, creating male
gametes, or primitive male
sperm. The researchers used the same embryoid bodies that generated the...
Automated analysis of bee behavior may yield better robots
...mpound. So far, researchers have learned that male
and female monkeys have different spatial memories. Males apparently remember the physical distance to food, while females follow landmarks to find treats, Balch says. "We're involved to measure precisely where the monkeys go and how long it takes...
Researchers engineer mouse embryonic stem cells to form sperm cell precursors
...rstanding might have applications for treatment of male
infertility," he added; for the condition can be caused by a failure of sperm to fully mature within the testicles. The researchers also hope to use the germ cell lines to study "imprints," genetic instructions that regulate certain genes yet are mis...
Changing one gene launches new fly species
...ompounds that coat the abdomen of female flies. A male
fly, in a romantic mood, strokes the female's abdomen with his feet, which have sensors that recognize specific hydrocarbons, like a perfume. In a previous report, Wu's laboratory found most males with the temperate version of the ds2 gene preferre...
Estrogen promotes gender differences in brain's response to stress
...er, the experiments have largely been done only in male
animals, and sex differences in how the PFC respon... To examine the effects of stress on PFC function, male
and female rats were exposed to different levels of mild stress, and then tested on a short-term mem...
Link between alcohol consumption and muscle damage in females
...female rats is more sensitive than muscle in their male
counterparts, (3) raising acetaldehyde also increa...the effect of chronic alcohol exposure for 6 wk in male
and female rats. Rats in this experiment were divided as follows: control male
(n=10); control fema...
Pesticide delays sexual maturation
...l maturity and interfere with hormone synthesis in male
children," the study authors write. "The practice ...y to ever measure the effects of endosulfan on the male
reproductive system. Decades of spraying this pesticide, and only this pesticide, on the village pro...
UT Southwestern researchers' discovery may lead to gene targets for new form of contraceptive
...enter at Dallas found while expanding studies into male
infertility. These findings, which could eventuall...so far, 17 of those genes are necessary for normal male
fertility. Because these genes appear to be active only in developing sperm, creating contraceptive ...
Scientists uncover novel role for estrogen in bone marrow
...ion of estrogen, in the form of estradiol, in both male
and female megakaryocyte cells. Further work demonstrated a crucial role for estradiol in proplatelet formation, as evidenced by their finding that the addition of exogenous estradiol increased proplatelt formation by more than %50, while the inhibit...
UT Southwestern researchers learn importance of insulin family signaling in male sex determination
...own that insulin family signaling is important for male
sex determination, a discovery that furthers the u... the intracellular signaling pathways that mediate male
sexual differentiation have remained elusive despite the fact that the controlling gene that unleash...
Researchers find new form of hormone that helps songbirds reproduce
... cues. "In some species, if a female bird hears a male
of the species sing, her ovaries grow faster and s...ley said. In addition, tape-recorded songs from a male
can trigger a rapid increase in testosterone of another male
defending his territory, a phenomenon W...
Social mothers appear to be better mothers
...t research has shown that social integration among male
baboons in Amboseli reduces basal levels of the ho...es may offer direct advantages, because some close male
associates tend to shield females from harassment, support their offspring in conflicts with others ...
New pathway discovered at Stanford provides insight into heart disease
.... The researchers screened matched samples from 11 male
patients before and after their heart transplants using microarrays to test for the activity of more than 12,000 genes. Among the genes that changed greatly between the two states was one called BNP, already known to be the first marker of heart dise...
Nicotine exposure in aging hearts
...ty (APS). Methodology The investigators studied male
Fischer 344 rats, a strain that has been extensive...rmalities that often accompany growing old. Twelve male
rats consisting of six young (2-3 mo old) and six old (22-24 mo old) were anesthetized, and a thorac...
Complement inhibitor decreases heart attacks and death in men following cardiac surgery
... Approximately 72% of those patients enrolled were male
and approximately 28% were female. TP10 significan...ng cardiopulmonary bypass surgery are different in male
and female patients. In addition, the numbers of women participating in this study were relatively s...
Male flesh flies high-speed pursuit of females
...atively fast speeds, over 2 meters per second. The male
flesh fly is very successful at chasing and catchi...a fly: visual guidance of sexual aerial pursuit in male
flesh flies." Flesh flies are so named because of their diet: They are among the first species to sh...
Diet may improve cognition, slow aging, and help protect against cosmic radiation
...ds through exercise than men. In studies involving male
and female rats, Lisa A. Eckel, PhD, and graduate ...s. "When given access to running wheels, only the male
rats decreased their food intake," says Eckel. "The female rats continued to overeat. This suggests ...
Sex in the soil
... female nematode worm bears XX chromosomes but the male
nematode has only a single X. The team showed that...l as egg--can self-fertilize if she doesn't find a male
but the offspring then are only female (XX). If the population density is high, as it would be near...
Lycopene's anti-cancer effect linked to other tomato components
...man's laboratory at Illinois randomly assigned 194 male
rats treated with a carcinogen to induce prostate ...f an on-going, long-term study of more than 51,500 male
health professionals by the Harvard University School of Public Health. Erdman, who was elected to t...
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