TRANSMISSION TO RODENTS OF LANSING TYPE POLIOMYELITIS VIRUS ORIGINATING IN THE MIDDLE EAST     

Schlesinger RW  Morgan IM  Olitsky PK 《Science (New York, N.Y.)》1943,98(2551):452-454

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烤烟调制过程中微波处理对烟草特有亚硝胺含量的影响^*   总被引：2，自引：0，他引：2  

宫长荣  宋朝鹏  许自成  李先锋  李伟  黄永成 《云南农业大学学报(自然科学版)》2006,21(4):534-536

 研究了烤烟调制初期及变黄过程中,微波处理对烟草特有亚硝胺(TSNA)、硝酸盐、亚硝酸盐及其它含氮化合物的影响。结果表明:在烤烟调制初期和变黄过程中用频率为2450MHz的微波对烟叶进行适当处理均能降低TSNA的含量。其中以在烟叶完成变黄后进行微波处理90s最为明显,总体来说,在烟叶变黄后对烟叶进行微波处理效果优于对鲜烟叶进行处理,然而微波处理对总氮、蛋白质等含氮化合物影响不很明显。  相似文献   

STUDIES ON THE ETIOLOGY OF EGYPTIAN TRACHOMA     

Olitsky PK  Tyler JR 《Science (New York, N.Y.)》1933,78(2010):18

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Names for cash     

Minelli A  Kraus O  Tubbs PK 《Science (New York, N.Y.)》2000,287(5456):1203-1204

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Fallout from nuclear detonations of February and April 1960     

KURODA PK  HODGES HL  MOORE HE 《Science (New York, N.Y.)》1961,133(3459):1130-1131

A sharp increase in the ratio of strontium-89 to strontium-90 in rain was observed at Fayetteville, Arkansas, after the French nuclear detonations of February and April 1960. Experimental data obtained suggest the possibility that part of the debris from atom bombs detonated in the tropical region may enter the stratosphere.  相似文献   

Requirement for DARPP-32 in progesterone-facilitated sexual receptivity in female rats and mice     

Mani SK  Fienberg AA  O'Callaghan JP  Snyder GL  Allen PB  Dash PK  Moore AN  Mitchell AJ  Bibb J  Greengard P  O'Malley BW 《Science (New York, N.Y.)》2000,287(5455):1053-1056

DARPP-32, a dopamine- and adenosine 3',5'-monophosphate (cAMP)-regulated phosphoprotein (32 kilodaltons in size), is an obligate intermediate in progesterone (P)-facilitated sexual receptivity in female rats and mice. The facilitative effect of P on sexual receptivity in female rats was blocked by antisense oligonucleotides to DARPP-32. Homozygous mice carrying a null mutation for the DARPP-32 gene exhibited minimal levels of P-facilitated sexual receptivity when compared to their wild-type littermates. P significantly increased hypothalamic cAMP levels and cAMP-dependent protein kinase activity. These increases were not inhibited by a D1 subclass dopamine receptor antagonist. P also enhanced phosphorylation of DARPP-32 on threonine 34 in the hypothalamus of mice. DARPP-32 activation is thus an obligatory step in progestin receptor regulation of sexual receptivity in rats and mice.  相似文献   

A quantum laser pointer     

Treps N  Grosse N  Bowen WP  Fabre C  Bachor HA  Lam PK 《Science (New York, N.Y.)》2003,301(5635):940-943

The measurement sensitivity of the pointing direction of a laser beam is ultimately limited by the quantum nature of light. To reduce this limit, we have experimentally produced a quantum laser pointer, a beam of light whose direction is measured with a precision greater than that possible for a usual laser beam. The laser pointer is generated by combining three different beams in three orthogonal transverse modes, two of them in a squeezed-vacuum state and one in an intense coherent field. The result provides a demonstration of multichannel spatial squeezing, along with its application to the improvement of beam positioning sensitivity and, more generally, to imaging.  相似文献   

Informatics and quantitative analysis in biological imaging     

Swedlow JR  Goldberg I  Brauner E  Sorger PK 《Science (New York, N.Y.)》2003,300(5616):100-102

Biological imaging is now a quantitative technique for probing cellular structure and dynamics and is increasingly used for cell-based screens. However, the bioinformatics tools required for hypothesis-driven analysis of digital images are still immature. We are developing the Open Microscopy Environment (OME) as an informatics solution for the storage and analysis of optical microscope image data. OME aims to automate image analysis, modeling, and mining of large sets of images and specifies a flexible data model, a relational database, and an XML-encoded file standard that is usable by potentially any software tool. With this design, OME provides a first step toward biological image informatics.  相似文献   

BACTERIUM GRANULOSIS AND TRACHOMA OF AN URBAN WHITE POPULATION     

Olitsky PK  Tyler JR 《Science (New York, N.Y.)》1930,71(1836):263-264

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Environment. Environmental monitoring network for India     

Sundareshwar PV  Murtugudde R  Srinivasan G  Singh S  Ramesh KJ  Ramesh R  Verma SB  Agarwal D  Baldocchi D  Baru CK  Baruah KK  Chowdhury GR  Dadhwal VK  Dutt CB  Fuentes J  Gupta PK  Hargrove WW  Howard M  Jha CS  Lal S  Michener WK  Mitra AP  Morris JT  Myneni RR  Naja M  Nemani R  Purvaja R  Raha S  Vanan SK  Sharma M  Subramaniam A  Sukumar R  Twilley RR  Zimmerman PR 《Science (New York, N.Y.)》2007,316(5822):204-205

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