Tag: "virgin" at biology news
US researchers uncover the science behind the breast cancer protective effect of olive oil
...so seeking funds for a study to see whether a high virgin
olive oil diet will modulate the expression of the Her-2/neu oncogene in human breast tumours in animals and make the tumours less aggressive. In addition, they want to investigate whether oleic acid-rich diets have any effect on the anti-tumour acti...
Ecologists see the primeval wood for the trees
...er and wild boar. There are no stands of primeval virgin
woodland in Europe today, so ecologists analyse tree pollen, several thousands of years old, preserved in lakes and peat bogs to reconstruct primeval forest. But the analysis is open to interpretation, as Dr Mitchell explains: "As every hay fever su...
Genetic changes in breast tissue caused by pregnancy hormone helps prevent breast cancer
...n Association for Cancer Research. The study used virgin
rats treated with a daily hCG injection compared to untreated virgin
rats. "Our results show that hCG induces permanent genetic changes in the mammary gland that are rel...
Long thought extinct, ivory-billed woodpecker rediscovered in Big Woods of Arkansas
... extensive clearing destroyed millions of acres of virgin
forest throughout the South between the 1880s and mid-1940s. Although the majestic bird has been sought for decades, until now there was no firm evidence that it still existed. The rediscovery has galvanized efforts to save the Big Woods of Arkansa...
Single gene is genetic switch for fly sexual behavior
...f fruitless "barely court at all" when paired with virgin
female flies in an observation chamber, according to the researchers. Males with the female fruitless splice form were also more likely to court other males than flies with the male form, suggesting that male-specific fruitless splicing "not only pro...
Geneticists identify 'master switch' that causes female flies to behave like males
...fly's brain and sensory organs. When paired with a virgin
female fruit fly, the masculinized females showed male courtship behavior: chasing the female fly and then tapping her on the abdomen. When a masculinized female was placed with a male, she responded to his advances with masculine rejection behavior-...
Oxytocin raises aggression, cuts anxiety during lactation; similar effects on virgin rats
... what effect direct OT insertion into the brain of virgin
female rats would have. They found that "driving u... anxiety and promoted social dominance behavior in virgin
females." * * * A model to determine OT regulation at birth Alison Douglas, from the University o...
APS oxytocin/vasopressin conference: 13 highlighted presentations
... cuts anxiety during lactation; similar effects on virgin
rats Maternal aggressive/protective behavior is r...researchers directly inserted OT into the brain of virgin
rats causing lower anxiety and increased social dominance. Also: A model to determine OT regulation ...
Woods Hole Research Center plans controlled burn in Amazon rainforest
...ed for a second time, and two square kilometers of virgin
forest will be burned for the first of several times, to simulate the repeated impacts of escaped agricultural fires that burn through the understory of frontier forests every dry season. These areas are already slated for destruction to expand soy f...
Post-pregnancy events promote breast tumor metastasis
...ts exhibiting post-lactation involution to that of virgin
rats. They found that the involution matrix contai...d proteins and generally more matrix proteins than virgin
matrix, indicating that involution matrix was undergoing significant structural changes. When immort...
'Scent of a woman' tells male redback spiders to find a mate
...g her eggs, meaning that males have to mate with a virgin
to maximize their reproductive success. "On the on... become sexually mature in time to mate with these virgin
females before the females mate with someone else." These are opposing pressures, and the researcher...
Honey bee chemoreceptors found for smell and taste
..., the sole task of male drone bees is to mate with virgin
queen bees, and the male's antennae are specifically designed for the detection of queen pheromone. "We have identified several honey bee odorant receptors that are abundantly expressed in male antennae," Robertson said. "This moves us an important s...
Edge density key to controlling gypsy moth spread
...sy moth range may help to slow their invasion into virgin
territory, according to a team of researchers. "Slowing the spread of the gypsy moth is a priority in forest management in the U.S.," says Ottar Bjornstad, associate professor of entomology and biology, Penn State. "Understanding the underlying patt...
ACS News Service weekly PressPac -- Feb. 7, 2007
...eady fabled for an array of health benefits, extra virgin
olive oil a centerpiece of the Mediterranean Diet...nditions the healthful phenolic compounds in extra virgin
olive oil remain stable in the acidic environment of the stomach for hours. In laboratory cultures, ...
Pregnancy hormone key to repairing nerve cell damage
..., Andrew Chojnacki and Yong, compared pregnant and virgin
female mice of the same age and found that pregnan... much new myelin two weeks following the damage as virgin
mice and that introducing prolactin mimicked the effects of pregnancy on myelin production and repai...
Pregnancy hormone increases nerve cells' insulation, restores damage
...improvement of symptoms." Comparing pregnant and virgin
female mice of the same age, Weiss's team counted hundreds of cells in their brains and spinal cords. They found that the pregnant mice had twice as many myelin-producing cells, called oligodendrocytes, and continued to generate new ones during pregn...
News tips from the Journal of Neuroscience
...ration. Furthermore, exogenous PRL administered to virgin
rats increased OPC generation and remyelination similar to pregnant rats. The authors suggest that such changes might affect axon function and/or remyelination in situations such as multiple sclerosis. 3. Multisensory Modulation of Auditory Proce...
Antarctic marine explorers reveal first biological changes after collapse of polar ice shelves
...ecological field studies are necessary." "This is virgin
geography. If we don't find out what this area is like now following the collapse of the ice shelf, and what species are there, we won't have any basis to know in 20 years' time what has changed, and how global warming has altered the marine ecosyste...
Female ticks have market on gluttony
... the other insects and that it is adaptive for the virgin
to remain small before mating. First, this speci...eight a further tenfold. On the other hand, the virgin
tick rarely exceeds the critical weight necessary for laying eggs. It will hang on to the host for w...
Call of the child
...Earlier studies demonstrated that mothers, but not virgin
females, recognize pup calls as behaviorally significant. In the current study, Liu and Schreiner show that the timing and strength of the auditory cortical responses to these communicative sounds differ between these two groups of female mice: neuro...