氟化工新产品的市场前景及发展建议

本文重点论述了氟化工新品的市场状况及在工业上的应用，针对氟化工行业发展现状，提出应采取的主要措施。     

几种希夫碱的合成及其异构体的表征

研究了由水杨醛与甘氨酸、L-异亮氨酸和 L-苯丙氨酸反应制得 3种希夫碱的合成方法及性质。红外光谱、氢核磁共振谱证明所合成的希夫碱中存在酚亚胺和酮烯胺的互变异构物。     

Uncertainty in the Austrian Theory of Capital

This paper is based on the traditional Austrian Theory of Capital which deals with expected values of future returns of investments over various periods of time. The longer the time period that elapses between the beginning of a production process and its end, the higher the (expected) productivity must be due to positive time preferences of individuals. This paper focuses on the uncertainty of future returns and on uncertainty preferences, instead. Based on the Hayekian idea of the dispersion of knowledge in society, it will be shown that there is a systematic relationship between the structure of capital and uncertainty. This result will be derived for a production process characterized by complete vertical integration and one which is not completely vertically integrated. The distinction between these two settings is crucial, if one accepts the distinction between an individual and a social period of production and the planning horizon which are introduced in this paper.     

Comparing the True Cost of Living Indices of Demographically Different Households

The comparison of true cost of living indices between demographically different households (relative equivalence scale) is argued to be sensitive to the way demographic characteristics enter demand analysis. In particular, parameters reflecting the cost of demographic characteristics at base prices, though themselves do not have welfare (equivalence scale) interpretation, can alter the benchmark from which demographically varying inflation effects are measured. The empirical analysis, based on a rank‐3 demand system applied to UK individual household data, shows that the inflation adjustment of child benefits can vary with the way demographic costs at base period prices are specified.     

碳酸二甲酯的生产技术与市场分析

介绍了碳酸二甲酯的生产工艺、国内外生产和消费情况，并对我国碳酸二甲酯今后的发展提出了建议。     

2001-2002年山东省农药工业回顾

本文在广泛调查与深入分析的基础上 ,对山东省近两年的农药生产、科研、销售和应用情况进行了综述。为企业及有关部门提供了详实可靠的资料。     

氟硅酸泵的国产化实践

硅氟酸极具腐蚀性 ,考虑到经济性 ,2 0 #合金、哈氏合金、蒙乃尔等贵金属很少被选为泵材。由于橡胶、塑料等高分子材料具有很好的抗蚀性和一定的机械性能 ,且价格便宜 ,因此一般选用其作为泵体材料。我们通过分析、比较 ,成功选择国产氟硅酸泵替代国外进口泵 ,实现国产化。     

明代皖南平原的圩田与农业生产

洪武时期，旧有圩田得到迅速恢复；建文至正德期间，圩田有较明显的发展，扩大了耕地面积，富豪围垦在其中占有重要地位，同时，圩田发展与蓄水防洪的矛盾已经凸显；嘉靖以后，水灾呈现加剧的趋势，除固有的自然因素的原因外，过度围垦、民人渔利、修防低效等社会因素起着重要作用，同时，对圩田的治理有新的进展。圩田在皖南平原农业生产上具有重要作用。     

Urban Influence on Costs of Production in the Corn Belt

This article determines the relative technical efficiency of rural- and urban-influenced crop/livestock enterprises in the Corn Belt. Farmers in urban-influenced locations are less technically efficient than farmers in rural locations. During 1998–2000, stochastic production frontier procedures indicate that a 10% increase in urban influence leads to a close to 4% decrease in technical efficiency. The most successful urban-influenced farms have controlled costs as effectively as rural farms. They have tended to de-emphasize that nondairy livestock activities—particularly beef and hogs—do not rely extensively on off-farm income, and have relatively large, less residential/lifestyle operations compared to less successful urban-influenced farmers. However, our statistical analysis clearly bears out the refrain in popular literature that urban proximity raises the cost for, and decreases the viability of, traditional farms.