News tagged with production of spermatozoa
Researchers identify a critical growth factor that stimulates sperm stem cells to thrive
Mar 06, 2009 |
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Researchers at the University of Pennsylvania School of Veterinary Medicine and Pennsylvania State University have identified for the first time a specific "niche factor" in the mouse testes called colony stimulating factor ...
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Research on pigs may lead to answers for human male infertility
Biology /
Feb 09, 2009 |
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In the late 1990s the Finnish Yorkshire pig population was threatened by a genetic defect which spread at an alarming rate and led to infertility. The defective KPL2 gene in porcine chromosome 16 caused pig spermatozoa to ...
Reproductive life of male mice is increased by living with females
Biology /
Jan 22, 2009 |
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Living with a female of its species can extend the reproductive life of a male mouse by a dramatic 20 percent, according to a study reported at the online site of the journal Biology of Reproduction.
Size did matter -- evidence of giant sperm found in microfossils
Jun 18, 2009 |
4.9 / 5 (8) |
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The mystery of giant sperm present in some living animal groups today has now taken on a new dimension -- in one group of micro-crustaceans new evidence shows that it is a feature at least 100 million years ...
Living with females extends the reproductive life of the male mouse
Biology /
Jan 22, 2009 |
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Living with a female mouse can extend the reproductive life of a male mouse by as much as 20 percent, according to a study conducted by Ralph Brinster and a team of other researchers at the University of Pennsylvania School ...
Hope for men with nonobstructive infertility
Dec 03, 2009 |
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It has been thought that men with non-obstructive azoospermia (NOA), a lack of sperm in the semen not caused by an obstruction within the reproductive system, are poor candidates for IVF. Now, researchers writing in the open ...
Dutch researchers make breakthrough in bioethanol production from agricultural waste
Nov 20, 2009 |
3.8 / 5 (4) |
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With the introduction of a single bacterial gene into yeast, researchers from Delft University of Technology in the Netherlands achieved three improvements in bioethanol production from agricultural waste material: 'More ...
The future of organic ornamental plants
Dec 11, 2009 |
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Whether plants are grown for food or ornamental use, conventional agricultural production methods have the same environmental impact. Pesticides, herbicides, and chemical fertilizers can find their way into ...
Dutch PhD develops fast method for preparing flu vaccine
Dec 07, 2009 |
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(PhysOrg.com) -- A shortage of flu vaccines may soon become a thing of the past. Researcher Manon Cox has designed an alternative process for producing large quantities of safe and effective vaccines at twice to four times ...
Microbes to Take Over Ethanol Production?
Nov 20, 2009 |
3.7 / 5 (7) |
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(PhysOrg.com) -- Not too long ago, it seemed that ethanol production was the wave of the future. The use of trash, wood chips or different types of plants -- usually grass or corn -- to make ethanol was considered ...
New study cites lower rate of quakes along some subduction zones
Space & Earth / Earth Sciences
Dec 04, 2009 |
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Most earthquakes occur along fault lines, which form boundaries between two tectonic plates. As the relative speed of the plates around a fault increases, is there a corresponding increase in the number of earthquakes produced ...
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