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H1N1 : basics to know |
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 sifeforever writes "
What is 2009 H1N1 (swine flu)?
2009 H1N1 (referred to as “swine flu” early on) is a new influenza virus causing illness in people. This new virus was first detected in people in the United States in April 2009. This virus is spreading from person-to-person worldwide, probably in much the same way that regular seasonal influenza viruses spread. On June 11, 2009, the World Health Organization (WHO) signaled that a pandemic of 2009 H1N1 flu was underway..........
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| Posted by xshadow on Mercredi, septembre 16 @ 12:50:54 CEST (94 reads)
(Read More... | 19697 bytes more | Score: 0) |
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antartica animals |
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 ezzahra.l writes "Antarctica, the frozen continent surrounding the Earth's South Pole, and the frigid seas surrounding it, are home to many animals. In particular, the Antarctic seas are teeming with life, ranging from microscopic plankton to the biggest animal that ever lived on Earth, the Blue whale.
Antarctica is the coldest, windiest, and driest place on Earth. The coldest temperature ever recorded on Earth was in Antarctica; it went down to approximately -129°F (-89°C)! The Antarctic land does not support many life forms. Most of the land of Antarctica is a frozen desert, with less precipitation than the Sahara Desert (under 2 inches = 5 cm a year). Oddly enough, 70% of the world's fresh water is frozen in the region of the South Pole.
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| Posted by xshadow on Vendredi, octobre 03 @ 21:12:59 CEST (252 reads)
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Eco-behavioural adaptations of camels |
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ezzahra.l writes "The ability of camel to withstand long periods without water is due to a series of physiological adaptations. Their red blood cells have an oval shape, unlike those of other mammals, which are circular. This is to facilitate their flow in a dehydrated state. These cells are also more stable in order to withstand high osmotic variation without rupturing when drinking large amounts of water.
Camels are able to withstand changes in body temperature and water content that would kill most other animals. Their temperature ranges from 34 °C (93 °F) at night up to 41 °C (106 °F) during the day, and only above this threshold will they begin to sweat. The upper body temperature range is often not reached during the day in milder climatic conditions, and therefore, the camel may not sweat at all during the day. Evaporation of their sweat takes place at the skin level, not at the surface of their coat, thereby being very efficient at cooling the body compared to the amount of water lost through sweating. This ability to fluctuate body temperature and the efficiency of their sweating allows them to preserve about five litres of water a day.
Camels eating green herbage can ingest sufficient moisture in milder conditions to maintain their bodies' hydrated state without the need for drinking.
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| Posted by xshadow on Vendredi, octobre 03 @ 21:11:56 CEST (262 reads)
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the elephant |
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 ezzahra.l writes "The largest mammal in the world is remarkably adaptable ; standing up to 13 ft (4 m) at the shoulder and weighing approximately 15,400 lb (7,000 kg). The elephants (Elephantidae) is a family of pachyderm which means thick-skinned animal .The elephant's gestation period is 22 months.Elephants are herbivores, spending 16 hours a day collecting plant food. Their diet is at least 50% grasses, supplemented with leaves, bamboo, twigs, bark, roots, and small amounts of fruits, seeds and flowers.In 1989, 100 000 elephants has been killed. "
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| Posted by xshadow on Samedi, mars 03 @ 01:11:11 CET (391 reads)
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Steps for Freezing Bovine Semen |
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 med-ab writes "From Semen Collection to the Liquid Nitrogen tank
M.I. Baracaldo 1, A.D. Barth 2 and W. Bertrand 3
1,3Minitube Canada, Ingersoll, ON Canada. 2Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada.
Introduction
Artificial insemination (AI) has contributed enormously to the genetic improvement of beef and dairy cattle in the last 50 years. "
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| Posted by xshadow on Samedi, février 17 @ 02:04:06 CET (472 reads)
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Leptin |
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 Leptin (from the Greek leptos, meaning thin) is a protein hormone with important effects in regulating body weight, metabolism and reproductive function.
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| Posted by xshadow on Dimanche, février 11 @ 22:07:08 CET (473 reads)
(Read More... | 1808 bytes more | Score: 2.66) |
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