Breeding like flies
Article Abstract:
Genetic management has been shown to be important for the maintenance of reproductive viability of captive animal populations. Experiments with Drosophila have shown that three techniques may be used to slow loss of genetic variation in captive populations. Equalizing genetic representation of the original wild animals, making the numbers of individuals descended from any given pair the same and equalizing the sex ratio of the mating adult population all contribute to continued genetic variation. These findings confirm the value of current breeding practices of captive endangered species.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Assembly of microtubule-associated protein tau into Alzheimer-like filaments induced by sulphated glycosamINNglycans
Article Abstract:
Sulphated glycosamINNglycans such as heparin induce tau under physiological conditions in vitro to form paired helical filaments (PHFs), composed of the microtubule-associated protein tau in a hyperphosphorylated state. PHFs are the major component of neurofibrillary deposits that constitute a defining neuropathological feature of Alzheimer's disease. Heparin also inhibits tau from binding to microtubules, leading to microtubule disassembly. Furthermore, heparan sulphate is found with tau in affected regions of the brain at the earliest stages of Alzheimer's disease.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Hale-Bopp looks like a winner
Article Abstract:
The perihelion period in the spring of 1997 appears to be interesting as comet Hale-Bopp heads toward it. Officially known as C/1995 O1, the comet was already exceptionally bright when it was discovered in the summer of 1995 despite its distance from the Sun, and is predicted to even be brighter as it heads for perihelion. Its dust production rate was also one of the biggest seen for a comet at any heliocentric distance.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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