Coliform myositis in a calf     

L L Wallace  B Fagin  D Schmidt  W H Fales 《Journal of the American Veterinary Medical Association》1990,197(11):1487-1488

Coliform myositis was diagnosed in a young calf with signs of pain, swelling, and edema of the right hind limb. Diagnostic methods included bacteriologic culture and antimicrobial susceptibility testing. The organism isolated was a gas-producing Escherichia coli. The infection responded to administration of trimethoprim/sulfadiazine, to which the organism was susceptible in vitro.  相似文献   

郑和一号船舶引航系统的设计与实现     

柯冉绚  彭国均  张杏谷 《厦门水产学院学报》2009,(4):372-378

为提高引航调度工作效率,保障引航船舶操纵工作更加安全,通过分析引航业务实际需求,采用了基于高分辨率影像、PDA（Personal Digital Assistant）嵌入式、WIFI（Wireless Fidelity）和GPRS（General Packet Radio Service）通讯等先进技术,构成了郑和一号船舶引航系统.该系统为船舶引航工作提供了更加直观的调度平台和航行导航设备.系统通过公网（Internet）或局域网（LAN）的网络通讯接收来自AIS通讯服务端传来的海域内所有船舶动态信息,实时在系统海图窗口中更新显示,同时为用户提供了基于多比例尺电子海图或多分辨率遥感影像,并可叠加航道、航标、锚地、泊位、地名以及水深点等多维助航要素数据,进行显示、查询、监控等操作功能,从而为船舶引航调度提供辅助支持.  相似文献   

两栖蔊菜种群及其入侵群落特征     

周凯华  吴锁龙  柯杰瀚  王艳 《草业科学》2022,39(5):888-898

两栖蔊菜(Rorippa amphibia)是近年来备受关注的入侵植物,主要出现在草坪中,并有不断向各种生境扩张的趋势,往往会成为其入侵群落中的优势种,因此研究其种群和群落特征及环境影响因素,对于更好地了解其入侵机制具有重要理论意义。本研究调查了不同小生境中受到两栖蔊菜入侵的草坪群落,采用扩散系数(C)、负二项参数(K)、平均拥挤度(m*)、丛生指标(I)、聚块性指标(PI)、Cassie指标(CA)和Green指数(GI) 7个指标对两栖蔊菜的空间分布格局进行研究,并分析两栖蔊菜的种群密度、盖度等特征。运用聚类分析、主成分分析(PCA)探讨了群落类型的差异及主要环境影响因子。结果表明,在不同生境条件下两栖蔊菜种群均呈聚集分布。无遮阴和半遮阴条件下,两栖蔊菜的种群密度分别为全遮阴条件的2.93倍和2.73倍,盖度分别为4.52倍和4.79倍,高度分别为1.57倍和2.37倍。即在全遮阴条件下两栖蔊菜种群的密度、高度、盖度均最低,且与无遮阴生境种群间差异显著(P <0.05);半遮阴条件下,两栖蔊菜的高度和盖度最高,与全遮阴生境下差异显著(P <0.05),与无遮阴生境种群高...  相似文献   

4株Ⅰ亚群禽腺病毒分离株对SPF雏鸡的致病性研究     

谢梓民  曾繁聪  傅禹铭  姜含雨  杨惠湖  柯骏鸿  罗瑞  梁昭平  张雪莲  黄淑坚 《中国畜牧兽医》2022,49(3):1032-1040

【目的】 探究Ⅰ亚群禽腺病毒（Fowl adenovirus,FAdV）分离株GDDL-4（FAdV-4）、GDB3-8a （FAdV-8a）、GDT08-8b （FAdV-8b）、GDWYT-11（FAdV-11）对SPF雏鸡的致病性,进而制定更加有效的防控措施。【方法】 设立4个攻毒组（GDDL-4、GDB3-8a、GDT08-8b、GDWYT-11）及对照组,攻毒组选择腿部肌内注射接种0.2 mL 10⁵ TCID₅₀病毒液,对照组接种等体积PBS。接种后观察SPF雏鸡的临床症状、剖检病变及组织病理学变化,同时检测其排毒量和病毒载量。【结果】 所有攻毒组鸡均表现为精神沉郁、消瘦、扎堆等,病理剖检以严重心包积液-包涵体肝炎综合征病变为主,其中GDDL-4组症状最为严重,死亡率最高达85%,总体死亡率在0~85%之间。排毒分析结果发现,GDDL-4和GDB3-8a组出现高滴度排毒（≥10⁴拷贝/μL）,GDT08-8b和GDWYT-11组仅能检测到低滴度（≤10³拷贝/μL）排毒。器官指数表明,除GDT08-8b组与对照组无明显差异外,其余攻毒组均能造成器官不同程度的肿大或萎缩。病理组织学切片显示,肝脏、肾脏、法氏囊的正常结构被破坏,可见肝细胞有大量淋巴细胞浸润、肾间质充血出血、法氏囊淋巴细胞坏死等。病毒载量分析结果显示,GDDL-4与GDWYT-11组在肝脏组织中病毒滴度最高,而GDB3-8a与GDT08-8b组在十二指肠中病毒滴度最高。【结论】 Ⅰ亚群FAdV的死亡率高,4株分离株均可导致雏鸡肝脏出现包涵体肝炎的病理变化,均可反复排毒,且分离株对不同的组织器官有不同的亲嗜性,在肝脏与十二指肠等组织中的病毒载量最高。  相似文献   

紫荆光合日进程及光响应   总被引：6，自引：1，他引：6  

陈模舜  柯世省 《福建林业科技》2005,32(3):47-50,54

自然条件下使用LCA-4型便携式光合测定系统研究了紫荆连体叶片的光合日变化及光响应。结果表明:(1)净光合速率的日进程曲线呈“双峰”型,胞间CO2浓度的日进程基本与净光合速率相反,中午胞间CO2浓度增高,表明净光合速率午间降低主要受非气孔限制因素的影响。暗呼吸速率日进程为单峰曲线,中午最高。气孔阻力的日变化曲线是单谷型,午间最低。(2)一天分时段光响应试验表明,饱和光强和表观量子效率上午最高,中午最低,下午有所上升。下午的光补偿点是上午的2倍,中午则是上午的近3倍。不同时段遮光都使得气孔阻力和胞间CO2浓度升高。  相似文献   

Über die Anwendung von Apfelwickler- und Pflaumenwickler-Pheromonfallen beim Warndienst für Kleingärtner     

Dipl.-Biol. H. -U. Schmidt 《Journal of pest science》1987,60(2):27-31

It is reported about the experiences with the Biotrap Lockstoff-Falle für Schadinsekten AW and PW (HOECHST AG, Frankfurt) to improve plant protection prognosis against the codling moth (Cydia pomonella Busck.) and the plum fruit moth (Cydia funebrana Tr.) for allotment holders, settlers and houseowners. The flight activities of these pests were observed with pheromone traps by 19 to 27 additional voluntary assistants (allotment holders) since 1982 to support the official plant protection service in monitoring the a. m. moth species.—For a time of 20 weeks the assistants reported each monday the number of captured moth's to the plant protection office. Curves of the flight activities were based on the weekly moth captures. Drawing conclusions from the four year lasting observations, it is evident, that the main flight activity of the one generation of the codling moth lasts from the 26. to the 29. calendary week. The first generation of the plum fruit moth can be obtained during the 21. and 23. calendary week and the second one from the 30. to the 33. calendary week. The suitable time for control measures varied from year to year and was published between 21st and 23rd of June for the codling moth and between the 12th and 23rd of July for the plum fruit moth. The experiment with allotment holders as additional assistants was very successfull.  相似文献   

Investigations on the influence of wood-inhabiting bacteria on the pH-value in trees     

O. Schmidt 《Forest Pathology》1986,16(3):181-189

Regardless of their isolation origin, bacteria from wetwood of fir and poplar, from polluted beech and spruce trees, and from discoloured timber of Ilomba, acidified aerobically glucose-rich substrates by organic acid production and increased the pH of protein media by ammonia. The pH-changes occurred in laboratory nutrient media and also in the physiologically characterized capillary liquids and wood flours of fir, poplar and spruce.  相似文献   

    

Schmidt H. 《Journal of pest science》1960,33(5):79

Ohne Zusammenfassung  相似文献   

Active enzymes in wood chips and their action on lignin during outside storage     

Prof. Dr. K. Fischer  Ing. I. Schmidt 《Wood Science and Technology》1991,25(4):281-287

Summary Wood storage has a great influence on the efficiency of a pulpmill. Great problems arise when using outside chip storage, especially in processing hardwoods, in that hardwood chips discolorate after a few days, which is not the case with spruce chips. The causes of such a different behavior of beech and spruce were investigated. It could be shown that a sufficient amount of active peroxidase, malate dehydrogenase and oxygen are prerequisites for the formation of phenoxy radicals within the beech lignin. This causes formation of new chromophores that discolorize the wood. Sufficient amounts of such enzymes are present in beech wood after harvesting.  相似文献   

Symptoms in slash pine seedlings following inoculation with the cone rust fungus Cronartium strobilinum     

A. N. Shukla  R. A. Schmidt  T. Miller 《Forest Pathology》2001,31(6):345-352

Six‐week‐old seedlings of slash pine (Pinus elliottii) were inoculated with sporidia of Cronartium strobilinum, which is the cause of southern cone rust disease, by wounding the apical tips of the seedlings. Pycnial sori developed abundantly within 1 month of inoculation on the epicotyl and primary needles. The progress of the pathogen was confirmed histologically within the cells of the stem and haustoria were observed near the nucleus of the cells. In the needles, pycnial pustules developed and the fungus was abundant in the mesophyll.  相似文献