鸭病康防治鸭传染病的研究(二)——对鸭霍乱的防治报告

将鸭霍乱病鸭、可疑鸭和试验性感染禽多杀性巴氏杆菌的鸭随机分为对照组和试验组,用鸭病康口服液进行疗效试验研究,并用西药进行对比。结果表明:鸭病康口服液对试验性感染禽多杀性巴氏杆菌鸭的保护率分别为100％、80％、40％;对可疑鸭的预防效果与土霉素无明显差异(P>0.05);对急性病鸭的治愈率不及肌注卡那霉素(P<0.05)。     

The Causes and Consequences of Immigrant Labour in the Construction Sector in Malaysia

Malaysian construction is highly dependant on immigrant labour; immigrants account for nearly 70 per cent of its workforce. Although they have aided the sector's rapid expansion, it has not been without costs. This paper examines the impact of immigrant labour on construction. The main finding is that immigrants, being largely unskilled, did not contribute to skill formation. Instead, they accumulated skills on‐the‐job, which were lost when they returned home. There was no evidence that immigrants displaced domestic workers since they were concentrated in jobs rejected by Malaysians. Furthermore, unlike in earlier periods, legal immigrants were no longer a cheap option, given the regulations governing their employment. They were not used to cut costs per se, but were used because domestic workers were not available in sufficient numbers. Despite the large immigrant presence, the general wage level increased, though admittedly not as rapidly as it might have in their absence. The reliance on immigrant workers has increased the need for supervision and quality control, thereby reducing the savings in cost; nonetheless, immigrants have helped keep costs in check. Surprisingly, rising wages and the continued shortage of labour have not led to a widespread adoption of labour‐saving methods. This is partly because productivity increases have managed to outpace wage increases, though this advantage is petering out. Also, immigrant presence has kept wages, as a proportion of total costs, manageable. The over reliance of the sector on immigrant labour is not desirable, especially since the majority is drawn from one source ‐ Indonesia. Any disruption of supply from this source can undermine the Malaysian economy. To avoid this, Malaysia must vary its source of immigrant labour and intensify efforts to attract domestic workers by improving conditions in construction.     

薏米中微量有机锗测定的研究

依据二甲氧基羟基苯芴酮与锗的显色原理,用分光光度法对薏米中微量锗进行测定.研究了于HAC-NaAC的缓冲体系,在溴化十六烷基三甲铵(CTMAB)存在下,二甲氧基羟基苯芴酮与Ge(Ⅳ)形成红色络合物,其络合物的最大吸收波长为529nm,Ge(Ⅳ)在0-1.0ug/mL范围内符合比尔定律.拟定方法具有较好的选择性,多数金属离子不干扰检测,用于薏米中微量有机锗的测定,该方法简单可靠,并获得满意的分析结果.     

论国家保障各民族的合法权益

新中国坚持马克思主义民族平等、团结的基本原则,确立了各民族共同繁荣发展的根本立场.国家通过立法、司法、民族政策以及其他行政举措等多种方式和途径,保障各民族的合法权益并形成了相关的保障机制.在此过程中,我国各民族获得了国家主人翁的权利和地位,各民族人民的利益得到了比较有效的保护,为维护国家统一、巩固和发展社会主义民族关系、促进各民族共同团结奋斗和共同繁荣发展提供了基本保证.     

余平坦模和余平坦分解

给出了有单位元的环上的余平坦模和余平坦分解概念，得到了一系列结果。     

ODD MAN OUT—THE MEIXNER HYPERGEOMETRIC DISTRIBUTION

Two open problems are described for the hyperbolic secant distribution, as a special case of the more general Meixner hypergeomet-ric distribution. The first concerns the completeness of the family of functions sech θ x , θ≥ 0. The second concerns the characterization of the class of canonical correlation sequences in bivariate distributions with marginals sech θ x , sech θ y. In both cases some partial results are put forward.