Variance in academia: the academic profession     

Kerckhoff AC 《Science (New York, N.Y.)》1988,239(4842):922-923

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Samples of the solar system: meteorites and their parent planets     

Vickery AM 《Science (New York, N.Y.)》1988,239(4842):924-925

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Is the Greenhouse Here?: A global warming plus hints of other climatic changes are starting to build the case for an intensifying greenhouse, but can the case be proven in time?     

Kerr RA 《Science (New York, N.Y.)》1988,239(4840):559-561

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Calculus: Crisis Looms in Mathematics' Future: Researchers and educators are debating how calculus should best be taught to increasingly recalcitrant students     

Cipra BA 《Science (New York, N.Y.)》1988,239(4847):1491-1492

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Doubts over fermat proof     

Cipra BA 《Science (New York, N.Y.)》1988,239(4847):1481

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Comparison of penicillin, oxytetracycline, and trimethoprim-sulfadoxine in the treatment of acute undifferentiated bovine respiratory disease   总被引：6，自引：5，他引：1       下载免费PDF全文

Mechor GD  Jim GK  Janzen ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(5):438-443

Penicillin, oxytetracycline, and a trimethoprimsulfadoxine combination were compared as first choice antibiotics for the treatment of acute bovine respiratory disease in weaned beef calves. There was no statistical difference in the mortality losses due to respiratory disease; however, the case fatality rate in the trimethoprim-sulfadoxine treatment group (3%) was markedly lower than in the penicillin (10%) and oxytetracycline (8%) treatment groups. The trimethoprim-sulfadoxine group also had statistically fewer treatment days compared to the penicillin and oxytetracycline groups (p < 0.05). Inclusion of mortality costs in the calculation of treatment costs demonstrated that treatment of the trimethoprimsulfadoxine group was appreciably less costly than treatment of the other groups. Temperature response abnormalities, defined as either an elevation in temperature or a failure of temperature to drop from one treatment day to the next, were associated with a relapse rate of approximately 50%. In vitro antibiotic sensitivity testing of Pasteurella haemolytica isolated from pretreatment nasal swabs was not a useful predictor of treatment success of antimicrobials.  相似文献   

An assessment of the utility of microcomputers and dairy herd management software for dairy farms and dairy practices   总被引：1，自引：1，他引：0       下载免费PDF全文

Menzies PI  Meek AH  Stahlbaum BW  Etherington WG 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(3):287-293

Microcomputer systems were placed in three veterinary practices each serving three farms (bureau), and onto nine dairy farms (on-farm). Over a twenty-four week period, the utilization of the computer system and the DHM software was monitored. The on-farm system was more costly in terms of equipment and technical support effort, but the information was utilized to a greater extent than it was by the bureau participants who had invested more user time per cow. Note that actual time will vary with the software program used. The farmers indicated that they wished to have access to the information offered by the software. `Computer phobia' was not found to be a problem. The expectations of the computer system and its benefits generally remained high. In general, the information available through the microcomputer system and the DHM software was found to be useful to both the dairy farmers and the veterinarians in this study.  相似文献   

Ectopic ureter in a cat          下载免费PDF全文

Kuzma AB  Holmberg DL 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(1):59-61

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Releases in israel ofAphelinus perpallidus,a recently introduced parasite of the pecan blackmargined aphid,Monellia caryella     

F Man Sour  M. K. Harris  J. D. Stone  R. Bueno 《Phytoparasitica》1988,16(2):171-174

Six shipments totaling 3452 mummies of the blackmargined aphid,Monellia caryella (Fitch), parasitized withAphelinus perpallidus Gahan, were obtained by air freight during the years 1982-1985 from Texas A&M Research Center, El Paso, Texas. About two-thirds of the mummies did not yield parasites. A colony ofA. perpallidus was established in the laboratory. Under laboratory conditions the percentage of emerged parasites was higher than that in the imported mummies, and the parasite had very limited impact on the aphid population. Field releases of the parasite were made but no establishment ofA. perpallidus was observed through the years.  相似文献   

Additional species of aphidoidea in Israel     

J. Halperin  A. Binazzi  E. Swirski 《Phytoparasitica》1988,16(3):231-237

Data are presented on 25 species of aphids recorded in Israel during the last 25 years. Information is provided on their host plants, localities and dates of collection. The occurrence of 11 of these species has not been reported previously. Three of the species are noxious:Cinara cupressi (Buckton),Monellia caryella (Fitch) andAphis citricola van der Goot (= ?A. spiraecola Patch).  相似文献