Intestinal adenocarcinomas in two beluga whales (Delphinapterus leucas) from the estuary of the St. Lawrence River.   总被引：1，自引：0，他引：1       下载免费PDF全文

D Martineau  S Lair  S De Guise    P Bland 《The Canadian veterinary journal. La revue veterinaire canadienne》1995,36(9):563-565

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三峡库区农村沼气综合利用途径与思考     

王德楷  郑钦玉 《四川畜牧兽医学院学报》2006,4(3):5-9

三峡库区资源丰富,但库区农村存在资源利用不合理、能源紧缺的情况.库区的气候及资源是发展沼气的有利条件.沼气是一项投资少,见效快,一次投资长期受益的好项目;是能够解决库区农村燃料短缺,提高用能品质,促进农民增收节支的有效途径,并且是保护生态改善农村生活环境,促进库区农村生态经济可持续发展的有效举措.  相似文献   

Association between Chlamydia psittaci seropositivity and abortion in Italian dairy cows.     

S Cavirani  C S Cabassi  G Donofrio  B De Iaco  S Taddei  C F Flammini 《Preventive veterinary medicine》2001,50(1-2):145-151

Although the seroprevalence of Chlamydia psittaci is widespread in Italian dairy herds, its role in inducing genital disorders has not been elucidated. We therefore set up a case-control study to compare seroprevalence to C. psittaci in an aborted-cow population and in a randomly selected control group in the province of Parma (the Po Valley of northern Italy). The true seroprevalence (45%) in aborted cows was significantly higher than that in the control group (24%) (adjusted odds ratio=2.53).  相似文献   

高等级公路植被护坡工程技术发展初探   总被引：5，自引：1，他引：4  

丁国建  蔡茂来 《浙江林业科技》2004,24(4):63-66,73

依据恢复生态学原理,在探讨植被护坡技术现状的基础上,对高等级公路植被护坡工程技术中的生物治理和工程治理进行分析,提出了植被护坡工程设计原则、技术发展趋势和建议.  相似文献   

深水区大型抗风浪网箱配套设施系统   总被引：1，自引：1，他引：0  

朱健康  丁兰 《福建水产》2005,(4):70-73

本文分析深水抗风浪网箱的发展现状,阐述网箱配套设施的基本工作原理,并提出装备网箱配套设施的必要性.为使深水抗风浪网箱养殖业稳步、持续发展,必须加大科研投入,尽快开展网箱配套设施的研究,研发一批实用性强、生产效率高、节省劳力和减轻劳动强度的设备.  相似文献   

基于财务视角的企业收益内部分配管理控制模式     

张玉周  丁绍凡  王丽洁 《湖南农业大学学报(自然科学版)》2005,(4)

趋利行为使得在企业收益分配中占主导地位的股东及经营者,有可能通过盈余管理或侵蚀他人利益来增加自身利益。为了保证分配的效率和公平,防止他人利益受损,在信息不对称情况下,本文认为,需要从财务角度对企业收益的内部分配进行规范,建立基于财务视角的企业收益内部分配的管理控制模式。  相似文献   

试论福建省国营林场分类管理     

王光玉 《福建林学院学报》1989,(Z1)

本文分析了福建省110个国营林场的类型、目前管理体制、管理办法及存在的问题。指出了目前国营林场管理办法中存在着种种弊端,跟深化林业改革很不适应,必须改革和完善国营林场管理机制,理顺“省办地管县监督”的管理体制,实行分类指导。本文就分类管理的依据,原则和实施办法进行了探讨,并提出了一些建议。  相似文献   

Sensitivity of populations ofBotrytis cinerea to triazoles,benomyl and vinclozolin     

Christiane Stehmann  Maarten A. De Waard 《European journal of plant pathology / European Foundation for Plant Pathology》1996,102(2):171-180

Sensitivity of field isolates (121) ofBotrytis cinerea from France (1992), Germany (1979–1992), Israel (1990) and the Netherlands (1970–1989) to the triazoles tebuconazole and triadimenol, the benzimidazole benomyl and the dicarboximide vinclozolin were tested in radial growth experiments. Resistance to benomyl (in 21 to 100% of isolates tested) and vinclozolin (in 25 to 71% of isolates tested) was common in most countries. EC₅₀s (concentrations of fungicides inhibiting radial mycelial growth ofB. cinerea on B5-agar by 50%) for tebuconazole and triadimenol ranged between 0.01–1.64 and 0.4–32.6g ml^–1, respectively, and were log-normally distributed. The variation factor (ratio between EC₅₀s of the least and most sensitive isolate tested) amounts 164 and 82 for tebuconazole and triadimenol, respectively. These values are comparable to those for azole fungicides applied in control of other pathogens. Hence, variation in sensitivity to triazoles can probably not explain limited field performance of triazoles towardsB. cinerea. Isolates from south west Germany (1992) were significantly less sensitive to tebuconazole than isolates collected earlier in Germany, Israel and the Netherlands. Such less sensitive populations may contribute to the limited field performance of DMI fungicides towardsB. cinerea. The sensitivity of isolates from south west Germany to tebuconazole was similar to that of DMI-resistant mutants generated in the laboratory. These mutants displayed stable resistance with Q-values (ratio between EC₅₀ of resistant mutant and wild type isolate) between 5 and 20. Sensitivity of field isolates and laboratory mutants to tebuconazole and triadimenol was correlated.  相似文献   

Paraprotein-induced defective haemostasis in a dog with IgA (kappa-light chain) forming myeloma     

Ruiz De Gopegui R  Espada Y  Vilafranca M  Cuadradas C  Fontcuberta E  Millá F  Roncalés J  Ruzafa A 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1994,23(3):70-71

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Tumours of Begonia and some other ornamentals,induced by Corynebacterium fascians     

H. A. Van Hoof  H. Huttinga  A. Knaap  H. P. Maas Geesteranus  W. H. M. Mosch  D. G. J. De Raay-Wieringa 《European journal of plant pathology / European Foundation for Plant Pathology》1979,85(3):87-98

In 1975 many tumours were observed in plants ofBegonia Schwabenland grown in Aalsmeer. Submersion of the roots ofNicotiana megalosiphon seedlings in a homogenate of tumorous tissue, induced tumours after two weeks. Short periods of submergence yielded results similar to those obtained after longer periods. Tumour homogenates lost their infectivity after ten min at 50°C. Aphids transmitted the infectious agent.Treatment with propylene oxide did not inhibit infectivity completely. Filtration through a 450 nm filter removed the infectious agent.Tobacco tumor virus or a viroid could not be isolated. Cultures ofCorynebacterium fascians, isolated from tumours ofN. megalosiphon were highly infectious and induced tumours in healthyN. megalosiphon andBegonia. Tumorous tissue homogenates ofPelargonium zonale, Dahlia sp.,Gladiolus sp., andLilium sp. also caused tumours inN. megalosiphon, from whichC. fascians was isolated. It was not possible to produce tumours inN. megalosiphon with homogenates from roses with symptoms of bud proliferation.Samenvatting In 1975 werden vele tumoren waargenomen inBegonia Schwabenland op Aalsmeerse bedrijven (Fig. 1). De infectiositeit van tumorweefsel kon goed en snel worden vastgesteld door de wortels van zaailingen vanNicotiana megalosiphon in een homogenaat van tumorweefsel te dompelen. Tumoren ontstonden na twee weken, de eindbeoordeling geschiedde na een maand (Fig. 2). Ook verschillende andereNicotiana spp.,Melilotus officinalis (Fig. 3) enPisum odoratum (Fig. 4) werden aangetast.Bij de infectiositeitstoets gaven zeer korte dompeltijden even goede resultaten als langere (Tabel 1). Infectieus sap verloor zijn infectievermogen na 10 min verhitting bij 50°C. Bladluizen brachten de smetstof over. Propyleenoxide verminderde de infectiositeit wel, doch onderdrukte deze niet totaal. Bij filtratie door een 450 nm filter bleef het infectieuse agens op het filter achter. Het tumor-inducerende agens was ook aanwezig in die delen van planten met tumoren welke gezond leken en het ging voor een gering deel over met zaad (Tabel 2).Uit tumoren konden wij geen tabakstumorvirus of een viroïde isoleren. Culturen vanCorynebacterium fascians, geïsoleerd uit tumoren vanN. megalosiphon bleken zeer infectieus en veroorzaakten tumoren inN. megalosiphon enBegonia. Homogenaten van tumorweefsel vanPelargonium zonale, dahlia (Fig. 5), gladiool (Fig. 6) enLilium Mid Century Hybrid Enchantment (Fig. 7) veroorzaakten ook tumoren opN. megalosiphon, waaruitC. fascians werd geïsoleerd. Met sap van kroeskopzieke rozen konden wijN. megalosiphon niet besmetten.  相似文献