四缸直列汽油机曲轴设计系统   总被引：1，自引：0，他引：1  

孙丽  刘永臣  朱艳茹 《农业装备与车辆工程》2006,(2):18-22

本系统以Pro／E软件和曲轴零件的设计要求及设计计算理论为依托，以VC＋＋6.0编程软件为工具．以Pro／E二次开发接口应用程序Pro／TOOLKIT为手段，采用动态链接库DLL方式实现了Pro／E、Pro／TOOLKIT和MFC三者之间的通信。而且，曲轴零件的全参数化设计与开放数据库ODBC相连接，实现了资料检索和数据管理的系统化。并且以CA488为例对设计系统进行了详细说明。  相似文献   

GPRS无线数据传送在农情监测系统中的应用   总被引：2，自引：2，他引：2  

郜向阳  王库  李墨雪 《农机化研究》2006,(6):186-188

在精准农业的农情监测系统中,要对各种信息(如GPS地理位置信息、土壤信息等)进行传输。为此,利用GPRS模块Q2406B和单片机W77E58,实现农情监测信息在中国移动GPRS网络上的无线传送。该技术使用方便,成本较低,可以稳定地传送数据,有利于大规模监测网络的建立。  相似文献   

基于Pro/E的渐开线直齿轮参数化设计   总被引：3，自引：0，他引：3  

刘志刚  曹文成 《农业装备与车辆工程》2007,(3):43-45

介绍了一种在Pro／E中创建渐开线直齿轮模型的方法，结合其中的二次开发工具程序和关系，实现了后续制作该类型齿轮时，可通过人机交互方式给定齿轮参数，系统自动生成齿轮模型，避免大量重复的设计工作。  相似文献   

基于Pro/E的装配体三维设计   总被引：1，自引：0，他引：1  

王文娟 《农机化研究》2003,(3):183-184

介绍了使用Pro/E计算机软件作为计算机设计绘图工具，建立3D实体模型，然后根据零件间的位置关系将所涉及的零件逐个地进行装配；并简单阐述了其工程图的制作及齿轮三维造型的方法。  相似文献   

猪戊型肝炎研究进展   总被引：3，自引：0，他引：3  

周锦萍  曾荣誉  孙泉云  刘佩红 《动物医学进展》2006,27(8):52-55

猪戊型肝炎是一种新发现的传染病,其病原戊型肝炎病毒(HEV)是一种无囊膜的RNA病毒,基因组全长为7.2 kb~7.4 kb。研究发现,世界上许多国家的猪群中普遍存在较高的HEV抗体,也检测到猪戊型肝炎病毒,与猪接触的职业人群的血清抗HEV抗体均高于非职业人群,有些国家从猪群中分离到的HEV核苷酸序列与当地居民感染的HEV具有高度的同源性。据此认为猪戊型肝炎是一种人兽共患病,猪可能作为戊型肝炎的贮存宿主,在人类病毒性肝炎流行病学中具有重要的地位,对于公共卫生、异种器官移植和食品安全等构成潜在威胁。  相似文献   

仔猪黄痢K88-K99-987p-F41多价菌毛疫苗的制备及小鼠免疫试验   总被引：2，自引：0，他引：2  

李鹏  王家乡  程碧军 《动物医学进展》2006,27(9):55-58,96

为了更好地预防仔猪黄痢,选取野生分离菌株HN2001（K88ab）、HN2002（K88ac）、HN2003（K88ad）、HN2004（K99）、HN2005（987p）和HN2006（F41）培养后用低温磁力搅拌法提取菌毛,制成5批多价菌毛混合油乳剂灭活苗。试验结果表明,5批多价灭活疫苗对小鼠的平均保护率达95．0％,为进一步进行本体动物试验提供了有价值的参考资料。  相似文献   

上海地区多种动物戊型肝炎血清学调查     

周锦萍  孙泉云  刘佩红  薛霞  李凯航  卢军  张维谊  齐新永 《动物医学进展》2006,27(12):85-88

在上海地区收集血液样品(猪、牛、山羊、马、鸡、鸭、鸽、犬和部分珍禽等)964份,应用双抗原夹心酶联免疫法(DS-ELISA)检测抗HEV抗体。结果表明,猪抗HEV抗体的阳性率为72.18%(301/417),其中母猪阳性率最高,为82.53%(222/269),育成猪阳性率为52.54%(62/118),保育猪阳性率为50.00%(15/30);22个猪场均检测到抗HEV抗体阳性猪,阳性率高于60%的猪场有16个,占阳性猪场的72.72%。在牛、山羊、马、鸡、鸭、鸽等血清中也检测到了抗HEV抗体,阳性率分别为6.00%,24.00%,16.00%,1.90%,12.77%和4.44%,明显低于猪群的阳性率。在宠物犬中检测到了抗体阳性犬,阳性率为17.82%(18/101),说明犬对HEV易感。珍禽中野鸭、火烈鸟对HEV也有一定的敏感性,阳性率分别为6.60%(1/15)和10%(1/10),在孔雀和鸵鸟的血清标本中未检测到HEV抗体。猪群中戊型肝炎病毒存在较普遍,其他与人类密切相关的多种动物也对HEV敏感。  相似文献   

Antiplatelet and Antithrombotic Effects of Isaridin E Isolated from the Marine-Derived Fungus via Downregulating the PI3K/Akt Signaling Pathway     

Ni Pan  Zi-Cheng Li  Zhi-Hong Li  Sen-Hua Chen  Ming-Hua Jiang  Han-Yan Yang  Yao-Sheng Liu  Rui Hu  Yu-Wei Zeng  Le-Hui Dai  Lan Liu  Guan-Lei Wang 《Marine drugs》2022,20(1)

Isaridin E, a cyclodepsipeptide isolated from the marine-derived fungus Amphichorda felina (syn. Beauveria felina) SYSU-MS7908, has been demonstrated to possess anti-inflammatory and insecticidal activities. Here, we first found that isaridin E concentration-dependently inhibited ADP-induced platelet aggregation, activation, and secretion in vitro, but did not affect collagen- or thrombin-induced platelet aggregation. Furthermore, isaridin E dose-dependently reduced thrombosis formation in an FeCl₃-induced mouse carotid model without increasing the bleeding time. Mechanistically, isaridin E significantly decreased the ADP-mediated phosphorylation of PI3K and Akt. In conclusion, these results suggest that isaridin E exerts potent antithrombotic effects in vivo without increasing the risk of bleeding, which may be due to its important role in inhibiting ADP-induced platelet activation, secretion and aggregation via the PI3K/Akt pathways.  相似文献   

The mechanism of sublethal chlorantraniliprole exposure causing silkworm pupation metamorphosis defects     

Jian Chen  Zhengting Lu  Mengxue Li  Tingting Mao  Hui Wang  Fanchi Li  Haina Sun  Minli Dai  Wentao Ye  Bing Li 《Pest management science》2020,76(8):2838-2845

  相似文献   

Food animals as reservoirs and potential sources of multidrug-resistant diarrheagenic E. coli pathotypes: Focus on intensive pig farming in South Africa     

Shima E. Abdalla  Akebe L.K. Abia  Daniel G. Amoako  Keith Perrett  Linda A. Bester  Sabiha Y. Essack 《The Onderstepoort journal of veterinary research》2022,89(1)

BackgroundDiarrheagenic E. coli (DEC) strains are a major cause of diarrheal diseases in both developed and developing countries. Healthy asymptomatic animals may be reservoirs of zoonotic DEC, which may enter the food chain via the weak points in hygiene practices.AimWe investigated the prevalence of DEC along the pig production continuum from farm-to-fork.MethodsA total of 417 samples were collected from specific points along the pig production system, that is, farm, transport, abattoir and food. E. coli was isolated and enumerated using Colilert. Ten isolates from each Quanti-tray were selected randomly and phenotypically identified using eosin methylene blue agar selective media. Real-time polymerase chain reaction (PCR) was used to confirm the species and to classify them into the various diarrheagenic pathotypes. Antimicrobial susceptibility was determined against a panel of 20 antibiotics using the Kirby-Bauer disk diffusion method and EUCAST guideline.ResultsThe final sample size consisted of 1044 isolates, of which 45.40% (474/1044) were DEC and 73% (762/1044) were multidrug-resistant. Enteroinvasive E. coli (EIEC) was the most predominant DEC at all the sampling sites.ConclusionThe presence of DEC in food animal production environments and food of animal origin could serve as reservoirs for transmitting these bacteria to humans, especially in occupationally exposed workers and via food. Adherence to good hygienic practices along the pig production continuum is essential for mitigating the risk of transmission and infection, and ensuring food safety.  相似文献