Warung Bebas

Rabu, 07 Maret 2012

Bird flu

The year 2006 was a year of bird flu pandemic. how not? until 17 August 2006, the WHO (World Health Organization) has listed as many as 239 cases and 140 deaths disebsbkan this virus. but, do you know that this virus has been transmitted from birds to humans since 1968? so as not to catch it, let us identify this virus.

Different causes of bird flu (Avian Influenza)
Avian influenza caused by type A influenza virus that has several subtypes. The virus is characterized by the presence of hemagglutinin (H) and Neuroamidase (N). bird flu virus is contagious at this time. Is the H5N1 subtype. The virus can survive in water up to 4 days at 20 C and more than 30 days at 0 C. virus will die in 60 C heat for 30 minutes or 56 C for 3 hours. In addition, the provision of disinfectants, detergents, or liquids containing iodine can be deadly virus.

Senin, 05 Maret 2012

How Eyes Formed?

cells that form the eyes of a developing embryo dikandungan chemically programmed to arrange a round oval shape. each cell has to know where to move to the formation of the other cells are guided by a particular protein.
"We think the organ is probably formed from the movement of individual cells," said the main researcher Martina Rembold of the European molecular biology laboratory. finding a different view of the opinions of scientists in general are seen in fish that could not be determined whether the effect in humans. scientists have known that the mat is formed from cells that line the exterior of the cylindrical structure. earlier, they believe that such cells together would divide a certain direction to form the eye.
however, observations Rembold and colleagues showed that these cells apparently move freely from the center of the cylinder into his skin to form a rounded oval organ of vision itau. they might use a protein produced per cell as his guide.