Echinococcus
Echinococcus (i-ky-nŏ-kok-ŭs) n. a genus of small parasitic tapeworms. Adults are found in the intestines of dogs, wolves, or jackals. If the eggs are swallowed by humans, the resulting larvae may cause hydatid disease. Two species causing this condition are E. granulosus and E. multilocularis.
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Sperm competition: linking form to function.(Research article)(Report)
Magazine article from: BMC Evolutionary Biology; 11/25/2008; ; 700+ words
; ...several theories regarding the evolution of sperm size exist [for reviews see [1, 2...general assumption in the literature on sperm competition that selection will favour males with longer sperm, due to their enhanced swimming velocity...
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Sperm really can tell us everything we ever wanted to know about sex ; HOME
Newspaper article from: The Independent - London; 11/13/2006; ; 700+ words
; ...Allen's famous portrayal of a neurotic sperm in Everything You Always Wanted To Know...man's DNA to the egg of a woman - the sperm is the gastronomic equivalent of a six...could lead to new insights into how the sperm manages the equivalent of a transatlantic...
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Sperm with bent tails point to possible male contraceptive.(BIOMEDICINE)
Magazine article from: Population Briefs; 5/1/2005; 700+ words
; ...though they produced normal numbers of sperm. Kissel enlisted the help of Population...biologist Gary Hunnicutt, an expert on sperm, to determine the cause of their infertility. Hunnicutt placed the sperm under the microscope and immediately noticed...
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Sperm from marijuana smokers move too fast, too early.
Newspaper article from: Health & Medicine Week; 10/27/2003; 700+ words
; ...significantly less seminal fluid and a lower total sperm count and their sperm behave abnormally, all of which may affect fertility...marijuana's effects on specific swimming behavior of sperm from marijuana smokers and to compare the results...
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Sperm bank seeks donors
Magazine article from: Journal of Business; 6/17/2004; ; 700+ words
; ...That's why Henrichs, who owns Spokane sperm bank N.W. Andrology & Cyrobank...inventory. N.W. Andrology sells the sperm it collects directly to couples who are...turn away new customers who are seeking sperm. "We do have a product shortage," he...
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Sperm may follow rising temperature to egg. (Heat-seeking missiles).
Magazine article from: Science News; 2/1/2003; ; 700+ words
; ...long distances seeking warmth. Much like sperm, apparently. A new study suggests that rabbit sperm find their way toward an unfertilized egg...a spot slightly warmer than the site where sperm begin the final leg of their journey, and...
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Sperm from marijuana smokers move too fast too early, study finds.
Newspaper article from: OBGYN & Reproduction Week; 11/3/2003; 700+ words
; ...have significantly less seminal fluid, a lower total sperm count, and their sperm behave abnormally, all of which may adversely affect...marijuana's effects on specific swimming behavior of sperm from marijuana smokers and to compare the results...
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Live sperm, dead bodies. (includes commentaries)
Magazine article from: The Hastings Center Report; 1/1/1990; ; 700+ words
; Live Sperm, Dead Bodies COMMENTARY Not only do technical means exist for post-mortem sperm recovery, but compelling ethical reasons as...and suffering. Eleven years ago I harvested sperm from a young man who had sustained fatal head...
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Sperm - Your country needs you
Newspaper article from: Belfast Telegraph; 7/31/2006; ; 700+ words
; ...London, Jude was conceived using donated sperm. All the couple knew about their son's...rules came into force lifting the right of sperm donors to remain anonymous. From April 2005, sperm donors faced the prospect of their offspring...
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Sperm-derived histones contribute to zygotic chromatin in humans.(Research article)
Magazine article from: BMC Developmental Biology; 3/31/2008; ; 700+ words
; ...an estimated 1% of the total DNA in mouse sperm cells remains nucleosome bound, whereas in human sperm this is estimated to be about 15% [3, 4, 5]. Characterisation of the histones in human sperm identified H2A, H2AX, H2AZ, H2B, H3...
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sperm
Book article from: The Oxford Companion to the Body
sperm A mature sperm ( spermatozoon ) is a complex and highly specialized cell, genetically...acrosome , which is an enzyme -rich structure covering the head of the sperm. This is essential for fertilization. Then a tail develops for forward...
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Semen and Sperm
Book article from: World of Forensic Science
Semen and Sperm The presence of sperm and semen can be important to a crime investigation. The visual...a suspected rape. As well, the genetic material present in the sperm can be analyzed and used as a genetic fingerprint to identify a...
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sperm whale
Book article from: The Columbia Encyclopedia, Sixth Edition
sperm whale largest of the toothed whales , Physeter...oceans. It is also called cachalot. Male sperm whales may grow to more than 70 ft (21 m...of the body; there is no dorsal fin. The sperm whale has a single nostril on the left side...
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sperm competition
Book article from: A Dictionary of Biology
sperm competition Competition between sperm from different males to reach and fertilize the egg cell of a single female. Sperm competition can occur among rodents in which a male mates a number of times with the same female, with a rest period...
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sperm oil
Book article from: The Columbia Encyclopedia, Sixth Edition
sperm oil liquid wax obtained from the sperm whale, or cachalot, and related marine mammals. It flows readily, is clear, and varies in color from pale yellow to brownish yellow. Chemically it is not a true oil. It is secured from the blubber...
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