THE MENTAL EFFECTS OF THE WEATHER     

Clayton HH 《Science (New York, N.Y.)》1899,10(246):378

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THEORY AND HYPOTHESIS IN GEOLOGY     

Lahee FH 《Science (New York, N.Y.)》1909,30(773):562-563

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Chorioptes bovis (Acarina: Psoroptidae) in some camelids from Dutch zoos     

H J Cremers 《The Veterinary quarterly》1985,7(3):198-199

The feet of three two-humped camels (Camelus bactrianus), one lama (Lama glama) and four alpacas (Lama pacos) from zoos and a circus in the Netherlands were examined for the mange-mite Choroptes bovis. Mites were found on two of the camels, the lama, and three of the alpacas. On one camel and one alpaca small mange lesions on the feet were present. This is the first report of Chorioptes bovis and chorioptic mange in the two-humped camel.  相似文献   

Asymmetric illumination contrast: a method of image formation for video light microscopy   总被引：4，自引：0，他引：4  

B Kachar 《Science (New York, N.Y.)》1985,227(4688):766-768

Images with high resolution and exceptionally broad gray scale can be obtained by the application of video contrast enhancement to an optimized procedure for imaging transparent objects with oblique rays of illumination. This technique is simple to set up. A conventional microscope with a light source whose position can be adjusted and a video camera with controls for gain and black level are the only essential components. Features such as high resolution, optical sectioning, control of contrast, and operation under low light intensity make this technique preferable, in several instances, to currently used video microscopy techniques.  相似文献   

In vitro studies of haemolysis by Leptospira interrogans serovars pomona and ballum   总被引：2，自引：0，他引：2  

J C Thompson  R B Marshall 《Veterinary microbiology》1986,11(3):285-292

Washed and unwashed red blood cells (RBC) from young calves, adult cattle, hamsters and humans were incubated with Leptospira interrogans serovars pomona and ballum. Washed cells suspended in saline were always haemolysed while unwashed cells and those which were washed and resuspended in plasma were never haemolysed, despite the presence of large numbers of organisms within the culture supernatant. Pomona produced greater haemolysis of cattle and human RBC than did ballum, but with hamster RBC ballum produced greater haemolysis than did pomona. A group of 6- to 9-month-old cattle infected with pomona showed no signs of clinical disease and RBC taken from them before infection and during the development of antibodies to pomona were haemolysed by pomona only after the cells were washed. Plasma therefore appears to have a protective function. This in vitro protective function of plasma even extended to plasma from young seronegative calves.  相似文献   

Neuerungen der Schädlingsbekämpfung     

H. 《Journal of pest science》1940,16(6):69-71

Ohne Zusammenfassung  相似文献   

THE BLACKENING OF COOKED POTATOES     

Nutting H  Pfund MC 《Science (New York, N.Y.)》1940,92(2390):356

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Vitamins in Canine Metabolism     

H. E. Robinson  L. D. Frederick 《Canadian journal of veterinary research》1941,5(10):288-291

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THE APPLICATION OF PHOTOGRAPHY TO THE PRODUCTION OF NATURAL HISTORY FIGURES     

Gage SH 《Science (New York, N.Y.)》1884,3(62):443-444

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Is the ocean surface depressed?     

S WH 《Science (New York, N.Y.)》1886,7(177):570-571

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