布尔山羊乳腺炎病原菌的分离与鉴定

应用三种方法对来自一个布尔羊场的50份奶样进行隐性乳腺炎检测，并对检出的阳性乳样进行细菌分离鉴定。结果表明，所用的三种方法具有良好的一致性；该羊场的隐性乳腺炎检出率为18％（9／50），阳性乳样中细菌检出率为77.8%(7/9),分离到6株病原菌，通过进一步鉴定，证明葡萄球菌和无乳链球菌是引起该场布尔山羊隐性乳房炎的主要病原菌，其次为大肠杆菌和巴氏杆菌。这就提示，对于布尔山羊，同样需要重视乳腺炎的预防与治疗。     

Research on Forecasting Water Requirement of Well Irrigation Rice by Time Series Analysis Method

The paper builds up the forecasting model of air temperature according to the data(1994-1998)of Fu Jin area.At the same time,the writer inquires into the relation of water requirement of well irrigation rice(ET)and average air temperature(T).Furthermore,the rice irrigation water reuqirement(ET)of Fu Jin area has been forecast in 1999.Thus,we can apply the model in irrigation management.     

Effect of testosterone on atherosclerosis in rabbits

AIM: To investigate the action of testoster one on atherosclerosis in a rabbit model. METHODS: 37 male cholesterol-fed rabbits were divided into five groups: castration group: castrated rabbits without exogenous testosterone admin istration; testosterone Ⅰ group: castrated rabbits with exogenous testosterone 0.25 mg·kg-1·d-1; testosterone Ⅱ group: castrated rabbits with e xogenous testosterone 2.5 mg·kg-1·d-1; testosterone Ⅲ group: cas trated rabbits with exogenous testosterone 12.5 mg·kg-1·d-1. The sham operation group was also set. Three months later, the levels of testosteron e, blood lipids (including TG, HDL-C, LDL-C), PAI activity, nitric oxide (NO) co ntent, endothelin (ET), angiotensin Ⅱ (AngⅡ) in blood were detected. RESULTS: It showed that testosterone in castration group was the lowest. There was no significant difference of TG or LDL-C between castration g roup and the other four groups. HDL-C in castration group was lower than that in other four groups. NO content of castration group was lower than that in others , but PAI activity, ET and AngⅡ concentration were higher than that in other gr oups. CONCLUSION:Testosterone is a protective factor against atherosc lerosis in male rabbits.     

李树叶片细菌性穿孔病的发生规律及防治研究

细菌性穿孔病可导致李树叶片大量脱落,树势衰弱,产量降低,品质下降.研究发现,病害的初侵染源来自枝干病斑,生长季节枝、叶、果互相交叉传染.种植感病品种、树势强旺、雨日多、雨量大为该病的流行因素.选用抗病品种、消除初侵染源、加强栽培管理、生长期用药控制是防治该病的有效措施.     

高纬寒地马齿苋人工栽培技术初探

从马齿苋的特征特性、类型及品种、人工栽培方式和季节、繁殖方式、栽培要点、采收、干制、病虫害防治等8个方面,详尽阐述了在高纬度寒冷地区马齿苋的栽培方式和栽培条件及马齿苋的发展前景。     

提高猪肉风味的饲料对育肥猪血液生化指标的影响

选择临床健康、70日龄的杜长大三元杂交仔猪60头,随机分成试验组和对照组,每组30头。对照组只喂给基础日粮,试验组饲喂提高猪肉风味的饲料,两组均在同一条件下,按常规方法饲养管理,饲喂90d结束试验。试验结束后,空腹耳静脉采血,离心分离血清,测定血清中14项生化指标。试验结果表明,提高猪肉风味的饲料对肥育猪血液各项生化指标无明显影响。     

电算化条件下会计工作的内部管理控制

随着计算机在财会工作中的普遍应用,会计电算化已经逐渐在全球范围内取代了手工记账。我国企业从上世纪八十年代中期开始推行会计电算化,目前已初见成效,但实际操作过程中还存在许多不如人意的地方。企业中会计工作的电算化缺乏硬性规定和明确要求,许多主管人员对电算化不甚了解,使得舞弊现象难以完全杜绝。更重要的是,企业的注意力还停留在会计核算的范畴内,工作重心置于保证会计信息的真实性和会计账簿及报表的处理上,强调事后的计量与确认,对过程的参与度较浅,导致了事前控制几乎处于空白状态,这其中深层次的原因就在于目前大部分企业对…     

乘积FC-空间中有关FCB-优化映象组的极大元问题

利用FC-空间中的有关FCB-映象和FCs-优化映象的极大元存在性定理,在乘积FC-空间中建立和证明了几个有较好容许性质的FCB-映象组和FCB-优化映象组的极大元存在性定理.