The Application of GIS in Small Watershed Classification in Loess Plateau

ＴｈｅＡｐｐｌｉｃａｔｉｏｎｏｆＧＩｓｉｎＳｍａｌｌＷａｔｅｒｓｈｅｄＣｌａｓｓｉｆｉｃａｔｉｏｎｉｎＬｏｅｓｓＰｌａｔｅａｕＺｈｕＪｉｎｚｈａｏ，ＷｕＢｉｎ，ＢｉＨｕａｘｉｎｇ，ＺｈｏｕＣｈａｎｇｑｉｎｇＣｏｌｌｅｇｅｏｆＳｏｉｌａｎｄＷａｔｅｒＣ...     

Laboratory parameters for the control of the course of therapy of canine Cushing's syndrome]

We compared the results of the ACTH stimulation tests with measurements of alkaline phosphatase and serum cholesterol during Lysodren therapy in 23 dogs with pituitary-dependent hyperadrenocorticism. The ACTH stimulation test proved to be a very sensitive parameter, by which the extent of Lysodren under- or overdosage could be reliably estimated. On the other hand, regulation of the individual Lysodren requirement was not possible by measuring AP and serum cholesterol only. However, it is highly probable that those two parameters can be used to evaluate the general state of metabolism, and they appear to be of prognostic value when greatly elevated.     

马鹿假台鹿采精技术的研究

对６头试验公鹿用假台鹿采精，采精前对特制的假阴道以药用凡士林为滑润剂，注水充气，温度为４０℃±１℃，以适宜的压力和滑润度，将其安装在人工制做的假台鹿内。拨赶公鹿于采精场诱其爬跨。结果，试验的６头公鹿中有４头能够采精，共２２头次，射精量平均每头次１．５４ｍｌ，精子密度为１８．６—３７亿／ｍｌ，精子活力在０．８以上。９３年每头次生产细管冻精１０６．２５支（４２５支／４头次），是同年电刺激采精法平均６４．４支／头次（９０２支／１４头次）的１．６５倍，此法既能采到质量高的精液，又比电采法省工、省时、省力、安全，是一种理想的马鹿采精方法。     

PEG诱导水分胁迫对柑桔幼苗细胞质膜透性及脯氨酸含量的影响

柑桔叶片相对含水量(RWC)随聚乙二醇(PEG)处理渗透势的降低而依次降低;叶片细胞质膜透性随PEG处理浓度的增加而依次增大;幼苗叶片累积脯氨酸的数量随水分胁迫时间和强度递增。     

β-葡聚糖对啤酒易滤性影响的研究

通过对啤酒中β-葡聚糖的定性定量分析和啤酒易滤性的测定,发现溶解状态的β-葡聚糖对啤酒的过滤没有明显的影响,而β-葡聚糖凝胶对啤酒过滤有严重影响.啤酒中β-葡聚糖凝胶的分子量在300 000以上,当含量达到20 mg/1时,就会使啤酒膜过滤困难.啤酒的易滤性与β-葡聚糖含量之间里r=-0.222的不显著负相关,而与β-葡聚糖凝胶的含量之间呈r=-0.841~(***)的极显著负相关.     

不同环境下作物基因型值和杂种优势的分析方法

根据加性－显性与环境互作的遗传模型，提出了利用多个环境的杂交亲本和Ｆ＿１的资料，采用ＡＵＰ法预测作物杂种后代在不同环境中的基因型值和杂种优势的分析方法。作为分析实例，本文对１９９２年和１９９３年陆地棉（ＧｏｓｓｙｐｉｕｍｈｉｒｓｕｔｕｍＬ．）杂交亲本（Ｐ）、Ｆ＿１皮棉产量和衣分的两年资料进行了分析。     

河北省桑属植物染色体倍数性研究

研究了桑属植物５个种３２个品种的染色体倍数性，发现宽城１０号等９个品种为三倍体（２ｎ＝３ｘ＝４２），其余为二倍体（２ｎ＝２ｘ＝２８）。     

Cystocentesis in dogs and cats]

The technique of cystocentesis in dogs and cats was studied. The indications and contraindications of this method are discussed, using illustrations.     

Research note: Postnatal development of electrolyte transport in calf rumen as affected by weaning time.

In a previous study we found a positive correlation between early weaning in calves and morphological parameters which were indicative of ruminal development, i.e. the length and width of the papillae. The objective of the present study was to determine to what extent this observation could be reflected by modulations of absorptive and secretory functions of the rumen mucosa. For this purpose the short-circuit currents (Isc) as a measure of electrogenic net ion fluxes and the transepithelial conductances (G(T)) as a measure of the overall tissue permeability were measured in vitro applying the Ussing-chamber technique. Simultaneously, the unidirectional flux rates of sodium and chloride across rumen wall epithelia were determined in the absence of electrochemical gradients. Under these conditions, significant positive net flux rates (Jnet) clearly indicate active mechanisms for electrolyte absorption. For the experiments 12 male Holstein calves 7 d of age were assigned to three groups of 4 animals each: milk group (I, slaughtered after 6 weeks of age), late weaning group (II, slaughtered after 9 weeks of age) and early weaning group (II, weaned after 6 weeks of age and slaughtered after 9 weeks of age). Whereas G(T) values remained unaffected by different age and feeding, Isc values were significantly affected by early weaning but were not influenced by age. Irrespective of weaning time active absorption of Na+ tended to be higher by about 60% in 9 weeks old animals. Active absorption of chloride was significantly increased in milk fed 9 weeke old calves and this effect was further stimulated by early weaning. In conclusion, the data show an increasing active Na+ absorption with age in calf rumen that could not be influenced by early weaning. Similarly, active Cl- absorption was initially increased during postnatal development and this effect could be stimulated further by early weaning.