商品代蛋鸡法氏囊病诊断与治疗的初步探索

鸡传染性法氏囊病是青年鸡的一种急性、接触性传染病,又称腔上囊炎、甘保罗病等,是由传染性法氏囊病病毒引起的疾病。本病遍布于全世界大多数养鸡业集中的地区,在个别鸡群中可造成相当大的损失。然而,又因为多数雏鸡是在母源抗体水平甚高的日龄被感染的,所以病毒感染使机体的免疫系统遭到破坏,引起免疫抑制,造成机体对多种疫苗的免疫应答能力降低,引起多种疾病继发感染。就一起罗曼商品蛋鸡传染性法氏囊病发病情况、临床症状、病理变化、诊治过程及防制方法进行阐述,并对发病原因加以分析。     

蛋鸡饲养法浅谈

<正>我国经济社会发展正处在转型期,农村改革发展面临的环境更加复杂、困难挑战增多。工业化信息化城镇化快速发展对同步推进农业现代化的要求更为紧迫,保障粮食等重要农产品供给与资源环境承载能力的矛盾日益尖锐,经济社会结构深刻变化对创新农村社会管理提出了亟待破解的课题。必须全面贯彻落实党的十八大和十八届三中全会精神,进一步解放思想,稳中求进,改革创新,坚决破除体制机制弊端,坚持农业基础地位不动摇,加快推进农业现代化。发展蛋鸡养殖是农业工作中一项收入型支柱产业,下面我就蛋     

浅谈蛋鸡难养要点

在临床实践中,鸡蛋养殖户对疾病把握不准,滥用药物,导致蛋鸡难养,养殖成本高。为此提出了鸡病诊断及鸡蛋养殖要点。     

浅谈蛋鸡脂肪肝出血性综合症的防治

<正>脂肪肝出血性综合症是一种营养代谢疾病,是由长期的脂肪代谢障碍所引起的。一般需要较长时间的治疗和调整才可见效,往往给蛋鸡生产造成较大的经济损失。现就该病的发病机理及防治措施谈谈自己的看法。1.蛋鸡脂肪肝出血综合症的主要症状病鸡多为肥胖,体质量较大,病鸡鸡冠、肉髯颜色变淡,严重的呈苍白色,上面有皮屑,精神沉郁,瞌睡喜卧,腹部膨大,柔软而下垂,鸡群产蛋量下降10%以上。     

浅谈鸡新城疫的免疫

新城疫是一种古老而又广泛流行的禽类病毒性传染病。现今世界和我国主要采取以疫苗免疫接种来预防该病的发生。我国在新城疫的防控上取得了重大的成绩,但是由于我国目前饲养量大,饲养范围广,庭院式饲养在一定程度上还占很大比例,再加上饲养场规范程度差,因此,新城疫在我国还时有发生,造成了很大的经济损失。为此,帮助养殖场（户）建立适合当地、科学合理的免疫程序是兽医工作者的职责。     

浅谈商品条码外观质量检视

本文介绍了商品条码外观质量的检测方法，避免因条码错误给企业造成经济损失，提高企业经济效益和社会效益。     

浅谈新疆规模化蛋鸡养殖环境控制技术的应用

近年来,在蛋鸡产业的发展过程中,全密闭式养殖模式备受认可。相比较于传统的蛋鸡养殖行业,全密闭式蛋鸡养殖的模式提高了鸡舍环境指标控制要求。但是,规模化养鸡环境控制技术必须要与现代化养鸡生产需求相适应,并且对养鸡的环境控制目标以及方式予以适当地调整,针对新型鸡舍环境控制技术展开深入研究与运用,进而为新型蛋鸡产业可持续发展奠定基础。     

浅谈监理对商品混凝土质量的控制

关于监理工程师如何对商品混凝土进行质量控制,从混凝土的原材料质量控制、配合比设计管理、混凝土运输管理和现场浇筑管理等几个方面提出了质量控制措施。     

浅谈以脂代油的条件

合理选用润滑剂,是设备防止泄漏、节约能源、降低消耗、延长使用寿命的重要途径。 润滑剂按相状态可分为气体、液体、半固体、固体润滑剂等。目前广泛采用的是液体和半固体润滑剂,即润滑油与润滑脂。固体润滑剂正在得到推广。 从润滑油、脂的基本润滑特性来看,二者的润滑机理基本上是相同的。如在滑动轴承中加入润滑剂,轴颈转动时带着油或脂顺着转动方向从大口走向小口,产生呈收敛楔形吸附油膜而支承轴颈运转,避免或减小了轴颈与轴承内表面的接触摩擦。这里,只是润滑脂油膜的产生过程比较复杂,它是依靠轴颈转动时对脂产生足够大的剪力,使脂中的纤维骨架(由金属皂构成)发生变形以至剪断,沿剪力方向作定向排列,导致纤维骨架中含蓄的基础油(一般为矿物油)流动,成为粘度接近基础油的流体吸附油膜。另外,为了保证润滑剂适     

浅谈蛋鸡大肠杆菌病发生原因及综合防治

文章分析了鸡大肠杆菌病的发病原因、症状、产检观察,提出了综合预防和治疗措施。     

谈谈市场机制下产品的商品化设计及其应用

产品的商品化设计在产品的开发设计中占有举足轻重的地位，一个产品在成功地推向市场，离不开商品化设计这一阶段，它是在产品推向市场前对产品进一步完善和完美的一个过程。本文论述了商品化设计前期-实用化设计中的人机工程设计，商品化设计中的降低成本设计，产品造型设计和包装设计等，及其在产品设计开发中的应用。     

协同商品设计理论及其系统模型

在分析创新、快速设计是现代企业制胜的法宝基础上,将快速设计的思想与概念创新设计自动化工具——DARFAD相结合,利用网络技术,将客户、企业、供应商等有机集成在一起,提出协同商品设计的概念,并给出系统模型。     

Reducing the formation of FIB-induced FCC layers on Cu-Zn-Al austenite

The irradiation effects of thinning a sample of a Cu-Zn-Al shape memory alloy to electron transparency by a Ga(+) focused ion beam were investigated. This thinning method was compared with conventional electropolishing and Ar(+) ion milling. No implanted Ga was detected but surface FCC precipitation was found as a result of the focused ion beam sample preparation. Decreasing the irradiation dose by lowering the energy and current of the Ga(+) ions did not lead to a complete disappearance of the FCC structure. The latter could only be removed after gentle Ar(+) ion milling of the sample. It was further concluded that the precipitation of the FCC is independent of the crystallographic orientation of the surface.     

Effects of amorphous layers on ADF-STEM imaging

A study of high-resolution ADF imaging in uncorrected and aberration-corrected STEMs was carried out by multislice simulation. The presence of amorphous layers at the surface of a crystalline specimen is shown to significantly alter the visibility of the atomic columns. After propagating through an amorphous layer a portion of the beam passes without any alteration while scattered electrons introduce a Gaussian background. The dependence of the image contrast on the crystal structure, orientation and the types of the atoms present in the crystal was studied. In the case of uncorrected probes an amorphous layer thicker than 200 A is necessary to achieve considerable reduction of the visibility of the atomic columns, but with aberration-corrected probes only 60 A is necessary. With changes in defocus, crystalline specimens with amorphous layers on the top can also be imaged and high-resolution ADF images can be obtained. An amorphous layer at the beam entry surface affects the ADF image more than that of an amorphous layer at the exit surface. Approximately linear reduction of the contrast (with a slop of 1) is expected with increased thickness of amorphous layer.     

The influence of boundary layers on friction

The influence of boundary layers on friction was investigated using a Bartel lubrimeter. Boundary layers have only a limited life and are re-formed in the contact area. A minimum specific pressure is required to deposit a solid lubricant film. The addition of MoS₂ lowers friction and frictional temperature. Some antiwear extreme pressure additives increase friction and others reduce friction and friction temperature. Some boundary layers tenaciously adhere to the surface and are only slowly worn away.     

The evolution of the surface layers on metals in sliding friction

The methods of speckle-interferometry, electron, optic, and atom-force microscopy were used to study the structure and regularities of deformation of surface layers on metals and alloys in friction. The causes of deformation localization are analyzed. An explanation of the strong wear resistance of Hadfield steel is proposed using data on the evolution of the surface layer structure.     

商品混凝土搅拌站的运输和泵送设备自购VS租赁

目前,商品混凝土在我国正以势不可挡的势头飞速发展,并以质量稳定、供应及时、污染少等特点,得到了大力推广,与传统的现场搅拌相比具有明显的优势.因此,商品混凝土搅拌站应运而生,尤其是随着禁止城市现场搅拌禁令的实施,商品混凝土搅拌站必定会迎来发展的春天.     

The effect of transfer layers on the surface contact and wear of carbon-graphite materials

Solid carbon-graphite materials are widely used in a variety of arduous tribological applications in which their ability to run either unlubricated or in the presence of fluids with unpropitious tribological properties can be exploited. The usual arrangement in such devices as seals and bearings is to run a carbon component against a much harder metallic or ceramic counterface of appropriately low surface roughness. In practice, it is often observed in these circumstances that, although the initial wear rate of the relatively soft carbon is high, a satisfactory long-term performance can be achieved if, and only if, a stable layer of carbonaceous material is generated both on the trace of the carbon and as a transfer layer on the harder counterface: in the absence of this film the high initial wear rate continues unabated. The range of carbon materials available commercially is large, but can be classified by the extent to which they have been graphitized—those with a higher graphitic content have a lower elastic modulus and generally higher wear rate than less graphitic specimens. In this paper, we consider the development of the contact conditions with component life and how these can be associated with the alleviation of the initial severity through the development of a cushioning layer of consolidated wear debris and thus offer an explanation of the experimental observations in terms of a contact mechanics model.     

Wear behaviour of boride layers on alloyed steels

The properties of boride layers on steels alloyed with chromium, molybdenum or vanadium are presented first. The properties considered are: chemical composition, phase composition, microstructure, thickness, hardness and roughness. The wear test results shown were obtained with different test rigs, so that the main wear mechanisms could be recognized. The results reveal that adhesion, abrasion and surface fatigue are strongly influenced by the solution of the elements of the differently alloyed steels in the boride layers, while tribooxidation is influenced to a minor extent