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Tag: "reproductive" at biology news

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...nile, non-reproductive stage to a mature, sexually reproductive adult," says Thummel, a professor of human genetics at the university and an investigator with the Howard Hughes Medical Institute. "Our kids stay sweet and cute through about 12 years of life and then, suddenly, in response to steroid and thyroid ...

Plants discriminate between self and non self

...hemical recognition ?such as that known from plant reproductive systems -- or physiological coordination between roots that belong to the same plant. To test this, the researchers used plants that had two roots and two shoots and split them into two separate plants that were genetically identical, but physiologic...

Prozac for future Plants on Mars

...hemical recognition ?such as that known from plant reproductive systems -- or physiological coordination between roots that belong to the same plant. To test this, the researchers used plants that had two roots and two shoots and split them into two separate plants that were genetically identical, but physiologic...

Most embryos produced during IVF do not result in live births

...from all the fertility clinics that report data on reproductive techniques. Director of the Yale Fertility Center,...orge Kovalevsky, M.D. "We as practitioners in the reproductive clinic are in a paradoxical situation," Patrizio added. "There is pressure to reduce multiple births...

The ecological effects of the Chernobyl disaster

...ratorie de Parasitologie Evolutive, France), found reproductive success was significantly reduced for the Chernobyl-nesting birds. Survival rates, number of eggs laid, and overall body condition was lower, despite similar nesting and laying dates. The radio nucleotides in the area also filter into the soil, and ...

UW scientists report a new method to speed bird flu vaccine production

...vaccines. In nature, viruses commandeer a cell's reproductive machinery to make new virus particles, which go on to infect other cells and make yet more virus particles. Vaccine makers use a monkey kidney cell line to make non-virulent viruses that serve as the raw material for vaccines.The technique reported ...

Picky female frogs drive evolution of new species in less than 8,000 years

...r mutation or some combination of those three, and reproductive isolation is just some glorious accident that arises from that," Moritz said. "We do have very compelling evidence. We have addressed various lines of evidence and conclude that there has been reinforcement and that has given rise to a new species ba...

Preventing a pandemic: Study suggests strategies for containing a flu outbreak

...ntervention occurred within 21 days and the virus' reproductive number (which represents the average number of peo...ectiveness of TAP and GTAP. For even higher viral reproductive numbers, household quarantines would also be necessary to contain the virus. A combination of TAP, p...

Weapon performance determines mating success in the collared lizard

...erritorial species with polygynous mating systems, reproductive success reflects phenotypic variation. At the gros...t bite-force performance was a strong predictor of reproductive success. However, no size measure was correlated with any estimate of mating success or with potenti...

Studies on human genome variation provide insight into disease

...es the way for examining an individual's potential reproductive success based on sequence variants of the LHB/CGB genes," explains Laan. "We may be able to determine whether an individual is particularly susceptible to spontaneous abortions or reduced gonadal function, for example." Contact: Maris Laan, Ph.D...

Housecat-sized Siberian tiger cubs get collared

...es the way for examining an individual's potential reproductive success based on sequence variants of the LHB/CGB genes," explains Laan. "We may be able to determine whether an individual is particularly susceptible to spontaneous abortions or reduced gonadal function, for example." Contact: Maris Laan, Ph.D...

Study hints at role of stem cell genes in testicular, breast cancers

... Next, turning to cancerous tissue outside of the reproductive system, in this case breast tissue, the team deter... associate professor of obstetrics, gynecology and reproductive sciences and co-director of the UCSF Human Embryonic Stem Cell Center. "This is the first indicati...

Chernobyl: The true scale of the accident

... Have there been or will there be any inherited or reproductive effects? Because of the relatively low doses to r...iferous plants, soil invertebrates and mammals and reproductive losses in plants and animals were seen in high exposure areas up to a distance of 20-30 kilometers. ...

Living anti-HIV gel shows early promise

...large quantities of the HIV-blocking protein. The reproductive and intestinal tracts are prime sites for HIV infe... that the microbes are better able to colonise the reproductive and intestinal tracts. Other issues that will need to be addressed include the safety of introducin...

Zebrafish may hold key to improved cancer research

...types of cancer, whether it's in the brain, blood, reproductive organs or elsewhere." The newest finding about the gene B-myb is especially compelling, said Spitsbergen. The B-myb gene has been conserved through hundreds of millions of years of divergent evolution in species ranging from worms to fruit flies, fi...

Sudden change in social status triggers genetic response in male fish, study finds

...s of male rattlesnakes, combat is often the key to reproductive success. But now scientists studying a species of African cichlid fish have discovered that low-ranking male cichlids can quickly become leading men without even putting up a fight. In fact, a drab subordinate male cichlid will begin But But now sc...

Scientists must offer solutions for conserving tropical forests in a rapidly changing world

...nal Park in Uganda, a 30-year record suggests that reproductive activity by forest trees is increasing; and at La Selva, Costa Rica, diameter-growth rates decreased among surviving individuals for cohorts of nine species measured annually for 17 years. These mysterious changes may be caused by large-scale driver...

Seafloor creatures destroyed by ice action during ice ages

... lower metabolic rates that lower their growth and reproductive rates. Elsewhere in the oceans, a brisingid starfish would reproduce annually and live for ten years. In the Antarctic these starfish can reach 100-years-old but reproduce only once every ten years. This means that full community recuperation takes u...

Gene therapy may protect normal tissues during radiation retreatment for lung cancer

... lower metabolic rates that lower their growth and reproductive rates. Elsewhere in the oceans, a brisingid starfish would reproduce annually and live for ten years. In the Antarctic these starfish can reach 100-years-old but reproduce only once every ten years. This means that full community recuperation takes u...

Getting an evolutionary handle on life after reproduction

...e suggestion that fish may experience little or no reproductive senescence based on evidence that they continue to produce eggs as adults. It's an open question whether postreproductive lifespan can influence fitness enough to be under selection. But in a field dominated by investigations into the origins of huma...

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