包装机械与自动化最新发展研究

进入21世纪后,世界包装机械的发展与自动化技术联系密切,自动化技术的应用使包装机械进入了智能化、高效率化、节能化的时代.目前的包装机械中,已经广泛应用了嵌入式产品、PLC、变频器、伺服、步进、运动控制器、人机界面、传感器技术.工业机器人、智能控制、机器视觉技术已经成为了未来包装机械应用的发展趋势.     

自然养猪技术存在问题及应对措施

自然养猪技术最早起源于日本、韩国.从1992年开始,日本开始对自然养猪技术进行系统研究,后来在日本、韩国大力推广和应用这项技术.1993-2002年我国开始引进该技术,在小范围内得到应用,2002-2006年在江苏、福建、吉林、山东开始引进推广,2006年至今,自然养猪技术取得了显著成效,受到中央有关部门的高度重视,大面积推广.各地畜牧技术推广部门将这一技术列为重点推广的畜牧新技术.目前全国大部分地区都有自然养猪技术示范点,取得了不错的成绩.     

浅析物联网应用技术

近几年来物联网技术受到了人们的广泛关注.本文介绍了物联网技术的研究背景,传感网的原理、应用、技术,无锡是首个国家传感网信息中心.以最具代表性的基于RFID的物联网应用架构、基于传感网络的物联网应用架构、基于M2M的物联网应用架构为例,对物联网的网络体系与服务体系进行了阐述;分析了物联网研究中的关键技术,包括RFID技术、传感器网络与检测技术、智能技术和纳米技术;最后,展望了无锡物联网技术作为国家首个传感网信息中心对人类生活、工业发展、科技进步的促进作用.     

试论先进教育技术对教学的影响

先进教育技术适应现代化教育的需要.合理、有效的利用先进教育技术可迅速快捷提高教育、教学水平和教学效果.先进教育技术为教育相关部门和教育相关事业带来了各种各样的变化与改进,使教学由传统模式转向现代模式,逐步走向以多媒体为主导的现代教学模式.现代教育技术的积极作用也越来越凸显.作者从先进教育技术的优势出发,对利用先进教育技术的必要性和可能性作了详细论述,提出了合理利用先进教育技术对教育教学改革具有不可替代的积极作用得观点.     

荧光定量PCR技术及其在畜牧兽医中的应用

实时荧光定量PCR技术是一种通过检测荧光信号的变化进行核酸定量的技术.目前,该技术已经应用于病原微生物、基因表达、基因组变异和多态性检测等许多方面.它的出现极大地克服了原有PCR技术存在的不足如交叉污染等问题,具有实时监测、快速、灵敏、精确等特点.本文综述了目前几种荧光定量PCR技术的基本原理及其在畜牧兽医中的应用.     

免疫荧光技术原理及应用

免疫荧光技术是在免疫学、生物化学和显微镜技术的基础上建立起来的一项技术.通过对免疫荧光技术的原理、标本制作、实验类型和应用的概述,全面地介绍了免疫荧光技术方法,为实际应用提供参考.     

蛋白质组学技术在人乳与牛乳中的研究进展

乳蛋白是生命最初阶段中最为重要的营养功能成分,并且种类多样、含量丰富.通过一系列的遗传改变、丰富的蛋白质翻译后修饰,使乳蛋白的构成变得非常复杂、数量异常庞大.采用蛋白质组学方法对乳蛋白进行系统、整体地研究,可以认识乳蛋白质在构成以及调控一些生命活动中的规律.这样能够非常全面、深入地表明乳蛋白质的表达水平.本文阐述了蛋白质组学中的主要技术,包括双向电泳技术、高效液相色谱技术、同位素标记相对和绝对定量(isobaric tags for relative and absolute quantitation,iTRAQ)技术、质谱技术以及生物信息学技术.分别讨论了蛋白质组学技术在人乳、牛乳中的应用,并对人乳与牛乳的差异蛋白质组学进行讨论.利用蛋白质组学技术分析人乳与牛乳蛋白,能够更有目的地加强对人乳与牛乳的认识,旨在为婴幼儿食品以及乳制品提供理论依据.     

地质测绘采用测绘新技术的应用研究

由于科学技术水平的提升,计算机技术、航空航天、网络技术和探测技术迅速发展,在测绘领域得到广泛应用.地质测绘技术随之发生了划时代的变革,特别是测量仪器的自动化、智能化及计算机、卫星定位体系、遥感体系及地理信息体系的应用,使测绘技术跨上了一个崭新的台阶.测绘新技术在地质调查中的应用范围越来越广,并占据了重要的、核心的位置.在地质工程测绘中采用测绘新技术是大势所趋,是科学技术发展的必然结果.本文着重对全球定位系统技术、遥感测绘技术、地理信息系统技术等测绘新技术与传统的测绘技术进行对照分析,对地质测绘中测绘新技术的应用进行简要阐述,说明在地质工程测量中应用测绘新技术的积极作用.     

乡镇畜牧兽医技术推广体系存在的问题及对策

畜牧兽医技术在我国部分地区应用了多年,并取得了良好的发展.从有利于环境保护、促进养殖业质量、提升居民饮食安全的角度出发,要注重畜牧兽医技术的发展与推广.本文对传统乡镇畜牧养殖进行了剖析,分析了推广畜牧兽医技术的意义和优势,并提出了乡镇畜牧兽医技术的推广策略.     

浅谈房屋建筑工程中钻孔灌注桩施工技术

房屋建筑工程中的钻孔灌注桩技术,因其独特的优越性得到了广泛的应用.本文主要就房屋建筑工程中钻孔灌注桩施工技术进行了探讨,先论述了钻孔灌注桩施工技术的重要意义、施工技术要点以及常见问题防治.     

Heartworm in dogs in Canada in 1985

In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).

Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.

     

Heartworm in dogs in Canada in 1988

In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%).     

Heartworm in dogs in Canada in 1984

In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.

Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.

     

Heartworm in dogs in Canada in 1991

In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium.     

Heartworm in dogs in Canada in 1989

In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.

Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.

     

Heartworm in dogs in Canada in 1987

In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%).     

Heartworm in dogs in Canada in 1986

In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).

Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.

     

Heartworm in dogs in Canada in 1983

In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.

Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.