实验性鸭疫里默氏菌病临床病理学动态变化

用常规方法 ,对人工感染鸭疫里默氏菌的小鸭进行了 17项生理生化指标的测定。结果显示 :病鸭血液中血红蛋白 (Hb)含量、红细胞 (RBC)数、淋巴细胞 (L)数、血清无机磷 (Pi)、总蛋白 (Tp)、球蛋白 (G)的含量及血清碱性磷酸酶活性显著下降 ;血中中性粒细胞 (N)数增多 ,血清谷草转氨酶 (GOT)和乳酸脱氢酶 (L DH)活性显著升高。结果表明 ,感染鸭疫里默氏菌的小鸭肝脏、心脏等的损伤严重。     

化学处理对竹材炭化的影响

在竹材进行炭化之前，用化学药液对竹材进行浸泡处理，通过这种处理方式，在相同的炭化压力和温度下，能缩短炭化周期，同时炭化后的竹片纹理清晰，色泽均匀，色差小。     

芦荟凝胶稳定化技术的研究现状

分析了影响芦荟凝胶稳定的主要因素,并对芦荟凝胶的稳定化技术进行了综述,为芦荟产业的发展提供理论依据。     

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。     

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.