Tag: "pheromones" at biology news
Sex pheromone blocked in bug
...mple, female mosquitoesfind hosts by smell and use pheromones
to guide other females to goodegg-laying sites....
Flies may taste bitter better, first map of insect 'tongue' reveals
... that the receptor produced by one Gr gene detects pheromones
important in sexual behavior and mating. A research group at another university also has found that a second receptor senses the sugar trehalose, a metabolic component of yeast and major part of the fruit fly diet. In the current study, Amrein's team...
Nature's ambush: pregnancy more likely from single unprotected intercourse than believed
...rom the woman or possibly due to the production of pheromones
at this time both factors have been suggested in previous studies; Intercourse accelerating ovulation experiments on rodents have suggested this, and a sub-analysis of the new study supports this possibility. However, a clinical trial would be nec...
Scientists compare rat genome with human, mouse
...ding genes involved in immunity, the production of pheromones
(chemicals involved in sexual attraction), the breakdown of proteins and the detection and detoxification of chemicals. To achieve its goal of producing a high-quality draft sequence, the Rat Genome Sequencing Project developed a new, "combined" app...
Fruit fly pheromone receptor first ever discovered linked to specific sexual behavior
...f which are triggered automatically in response to pheromones
or other stimuli, Amrein said. Although the same p...-- in a behavior known as tapping. After detecting pheromones
from the female, the male produces a courtship song through rapid wing vibrations. The receptive fem...
Male baboons recognize and care for their own offspring
...gues have already launched studies to explore what pheromones
or odor molecules might provide males clues to the genetic identity of offspring. They are also studying how the father-infant relationships develop -- whether they are initiated by the father or by the mother. More broadly, she said, the researcher...
Birds do it. Bugs do it. But why don't we?
...eys rely on highly specific scent molecules called pheromones
to find a suitable mate. Even our humble mammal co...i "George" Zhang. He believes color vision put our pheromones
out of business. Our closest relatives on the primate family tree rely on "sexual swelling" and gaud...
Pheromones in male perspiration reduce women's tension, alter hormone response
...Web site. "It has long been recognized that female pheromones
can affect the menstrual cycles of other women," s...o document mood and neuroendocrine effects of male pheromones
on females." In a study led by Preti and colleague Charles J. Wysocki, extracts from the underarms o...
Pheromone receptors need 'escorts'
...hemical odorants released by animals. Detection of pheromones
takes place in a specialized structure, called the vomeronasal organ (VNO). Although the VNO resides in the nasal cavity, the pheromone sensory system is distinct from the sense of smell, as are the chemical receptors involved. In animals possessing ...
On the nose
...anging from single-celled organisms to orangutans, pheromones
do everything from triggering mating to establishi...ies. In humans, the best proof that people release pheromones
can be seen in menstrual synchrony when women living in a college dorm, for example, all menstruate...
How the nose knows a rose-or a mate
...neurons each had highly selective responses to the pheromones
of the introduced mouse, depending on the introduced mouse's genetic strain and sex. Interestingly, the face seemed to be the most important source of pheromones. Other researchers are exploring how the axons from the sensory neurons negotiate "an e...
Researchers record first 'pheromone images' in brains of mice
...urnal Science , show that chemical signals called pheromones
trigger highly specific patterns of neural excitat...r genetic backgrounds. This suggests there must be pheromones
that male mice of one genetic identity have, but that male mice of another genetic identity do not. ...
Science's top ten: Discovery of genes' 'control switches' named top advance of 2002
... the male mouse nose, where it seems to detect the pheromones
of lady mice. The Fastest Films: This year, researchers caught a glimpse of electrons whizzing around atoms, and made it into a movie. This high-speed film-making technique relies on ultra short pulses of laser light to freeze motion in frames just...
Science picks - leads, feeds and story seeds
...ies find females by sight and use chemicals called pheromones
at close range. If the female accepts the male, they couple end to end and may go on a short courtship flight. They may remain coupled for an hour or more, sometimes overnight. The male passes a sperm packet called a spermatorphore to the female. ...
Sex-pheromone link to insect evolution
... says Roelofs, whose paper, "Evolution of moth sex pheromones
via ancestral genes," will be published on the web...that female insects attract males with specialized pheromones
that he compares to radio frequencies. At major events with thousands of people, for instance, polic...
Rockefeller researchers provide the first functional evidence for mammalian pheromone receptors
... the mammalian nervous system that actually detect pheromones
have remained elusive. Now, a team of researchers...st functional evidence for molecular receptors for pheromones
in mammals. Their findings contribute to our understanding of the functioning of the brain in orches...
Bacterial quorum-sensing structure solved
...communicate -- by releasing and detecting chemical pheromones
to gauge their population density -- the molecular structure of a key protein in this interbacterial communication has been solved. This discovery could be the first step toward human intervention in these signaling pathways, a phenomenon known as q...
Strange signals from breastfeeding
...ous level, and strengthens the argument that human pheromones
exist and still exert a subtle influence over us. In the study, smells associated with breastfeeding increased feelings of sexual intimacy in childless women volunteers. Why this should be so is a mystery, but the researchers suggest it may be a way...
Michigan State scientists identify chemical come-on of sea lamprey
...han the females and build nests. Then they release pheromones
to lure the ripe females. To find the chemical, Li...ely applicable to other fish and that synthesizing pheromones
both to control and boost fish populations holds promise....
Pheromones control sex discrimination in mice
... receptor in mice, the researchers discovered that pheromones
appear important for gender recognition. Not only ...y applied mouse urine -- known to contain a mix of pheromones
-- to VNO tissue and used multi-electrode arrays to measure the electrical activity of the VNO tissu...