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PubMed2000

[Sensitivity of the hog slater Asellus aquaticus to the toxic effects of heavy metals during different periods of ontogenesis, during different seasons and at different temperatures].

A study was made of acute toxic effects of Cd+, Cu+, Al+, Pb+, Ni+, Mn+ and Zn+ ions on embryos, juveniles, and adults of Asellus aquaticus L. at 19 and 29 degrees C, when examined in different seasons of the same year. The highest sensitivity to heavy metals was displayed by embryos. The metal sensitivity commonly decreases with age, however, during hormonal rearrangements associated with reproduction this was seen to increase again. For all age groups the heavy metal toxicity increases with increased temperature rises. The importance of a more strict control of water quality in the system of lakes and rivers is suggested, especially in spring and summer time when the mass reproduction of hydrobionts occurs.

Animals↗
PubMedDate not supplied

[Development of delayed-type hypersensitivity to hog cholera].

Leukocyte migration inhibition test showed that pigs with classical swine fever develop delayed type hypersensitivity. The highest migration inhibition (65-85%) was observed in animals with the acute form, on day 3 after infection, or directly before death, or in animals immunized with reactogenic strain with clinical signs of disease. In some pigs with acute form the migrating capacity of leukocytes was restored on days 7-8 postinfection. Leukocyte migration inhibition factor is detected in the sera of pigs starting from day 3 after infection with the virulent strain. The degree of delayed type hypersensitivity correlated with the outcome of classical swine fever.

Animals↗
PubMedDate not supplied

Hog wild.

In a little over a decade, Harley-Davidson went from being a symbol of everything that was wrong with American manufacturing to the archetypal American success story, a company that was able to beat the Japanese at their own game. Its secret: combining the best of Japanese business practices with closeness to the customer that is so intense it's scary.

Consumer Behavior↗