Mutations affecting programmed cell deaths in the nematode Caenorhabditis elegans   总被引：18，自引：0，他引：18  

E M Hedgecock  J E Sulston  J N Thomson 《Science (New York, N.Y.)》1983,220(4603):1277-1279

Mutations in two nonessential genes specifically block the phagocytosis of cells programmed to die during development. With few exceptions, these cells still die, suggesting that, in nematodes, engulfment is not necessary for most programmed deaths. Instead, these deaths appear to occur by cell suicide.  相似文献   

UNIVERSITY AND EDUCATIONAL NOTES     

Thomson E 《Science (New York, N.Y.)》1927,65(1682):299-300

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UNIVERSITY AND EDUCATIONAL NOTES     

Thomson E 《Science (New York, N.Y.)》1927,66(1712):376-378

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REMINISCENCES OF PHYSICS AND PHYSICISTS     

Thomson JJ 《Science (New York, N.Y.)》1934,80(2069):169-173

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Shaping of hooks in New Caledonian crows     

Weir AA  Chappell J  Kacelnik A 《Science (New York, N.Y.)》2002,297(5583):981

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A closer look at water-related geologic activity on Mars     

McEwen AS  Hansen CJ  Delamere WA  Eliason EM  Herkenhoff KE  Keszthelyi L  Gulick VC  Kirk RL  Mellon MT  Grant JA  Thomas N  Weitz CM  Squyres SW  Bridges NT  Murchie SL  Seelos F  Seelos K  Okubo CH  Milazzo MP  Tornabene LL  Jaeger WL  Byrne S  Russell PS  Griffes JL  Martínez-Alonso S  Davatzes A  Chuang FC  Thomson BJ  Fishbaugh KE  Dundas CM  Kolb KJ  Banks ME  Wray JJ 《Science (New York, N.Y.)》2007,317(5845):1706-1709

Water has supposedly marked the surface of Mars and produced characteristic landforms. To understand the history of water on Mars, we take a close look at key locations with the High-Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter, reaching fine spatial scales of 25 to 32 centimeters per pixel. Boulders ranging up to approximately 2 meters in diameter are ubiquitous in the middle to high latitudes, which include deposits previously interpreted as finegrained ocean sediments or dusty snow. Bright gully deposits identify six locations with very recent activity, but these lie on steep (20 degrees to 35 degrees) slopes where dry mass wasting could occur. Thus, we cannot confirm the reality of ancient oceans or water in active gullies but do see evidence of fluvial modification of geologically recent mid-latitude gullies and equatorial impact craters.  相似文献   

TAF1B is a TFIIB-like component of the basal transcription machinery for RNA polymerase I     

Naidu S  Friedrich JK  Russell J  Zomerdijk JC 《Science (New York, N.Y.)》2011,333(6049):1640-1642

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highway stormwater runoff quality: development of surrogate parameter relationships     

Thomson  N. R.  McBean  E. A.  Snodgrass  W.  Monstrenko  I. B. 《Water, air, and soil pollution》1997,94(3-4):307-347

The development of relationships for predicting the impact of highway stormwater runoff is described. The predictive relationships are regression-based equations reflecting variations in the magnitude of the constituents of interest. The objective is to identify a subset of constituents that can be used as surrogates for the remaining constituents as a means of decreasing the costs of collection and measurement of highway stormwater runoff quality data. The Minnesota highway stormwater quality database complied in the late 1970's and early 1980's is employed in identifying the set of surrogate parameters. The findings indicate that total suspended solids, total dissolved solids, total volatile solids, and total organic carbon are effective surrogate parameters for numerous metals, ionic species, and nutrients. The findings also indicated that the developed ionic species constituent relationships are portable, while the metal and nutrient constituent relationships were limited to urban sites with similar environmental conditions. The development of these relationships represents a step towards remediating and preventing the problem of nonpoint source highway pollution.  相似文献   

Detection of Pasteurella multocida in pigs with porcine dermatitis and nephropathy syndrome.   总被引：1，自引：0，他引：1  

J R Thomson  N MacIntyre  L E Henderson  C S Meikle 《The Veterinary record》2001,149(14):412-417

Comprehensive bacterial cultures were made on samples from 20 pigs that had died of porcine dermatitis and nephropathy syndrome after a short clinical illness. Eleven species of porcine bacterial pathogens and a range of commensal organisms were isolated. Pasteurella multocida was isolated from 16 of the 20 cases but the other pathogens occurred much less commonly. P. multocida was isolated from between one and five sites per case and from the tonsils, retropharyngeal lymph node or lungs in 14 of the 16 cases. Immunohistochemical investigations of kidneys from 30 cases of the syndrome (including the 20 cases in the bacteriological study) revealed P. multocida-specific staining in 26 of the cases, primarily in the renal tubular epithelial cells of the proximal convoluted tubules, but also in the glomeruli, in lesions of renal vasculitis and in the cytoplasm of interstitial mononuclear cells.  相似文献   

The immunogenicity of a multicomponent clostridial oil emulsion vaccine in sheep     

R O Thomson  I Batty  A Thomson  J B Kerry  H B Epps  W H Foster 《The Veterinary record》1969,85(4):81-84

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