乙酰甲胺磷原粉新工艺研究

选用少量催化剂与硫酸二甲酯将甲胺磷直接乙酰化,采用双溶剂,经过通氨,静止分层,萃取、蒸馏、脱溶、结晶、烘干得乙酰甲胺磷原粉.工业化实验乙酰化收率＞95%,原粉收率＞80%,产品纯度＞95%.     

甜茶原粉生产及其产品指标制定

文章采用水提、大孔吸附树脂吸附、75%乙醇洗脱等方法对甜茶原粉进行试生产试验,生产结果表明:粗品中的总黄酮含量为2.52%、甜茶苷含量为20.5%;精品中的总黄酮含量为7.5%、甜茶苷含量为45.5%。初步制定了以甜茶苷和黄酮为含测的甜茶原粉产品指标。     

“无公害”毒辣祸及京津沪——剧毒农药灌根危害大

中国农业大学食品营养与安全系陈敏教授在接受记者采访时谈到，我国现有农药500多种，国家明令禁止在蔬菜中使用的37种。如666、DDT、甲胺磷、甲拌磷(3911)、甲基对硫磷(甲基1605)、对硫磷(1605)、呋喃丹等，均属高毒高残留农药，是国家明令禁止在蔬菜中使用的。     

甜茶原粉生产及其产品指标制定

文章采用水提、大孔吸附树脂吸附、75％乙醇洗脱等方法对甜茶原粉进行试生产试验,生产结果表明：粗品中的总黄酮含量为2．52％、甜茶苷含量为20．5％;精品中的总黄酮含量为7．5％、甜茶苷含量为45．5％。初步制定了以甜茶苷和黄酮为含测的甜茶原粉产品指标。     

标准制修订

修订标准 GB/T 5009.103-2003 GB/T 5009.103*2003植物性食品中甲胺磷和酰甲胺磷农药残留量的测定 本标准规定了谷类、蔬菜和植物油中甲胺磷和乙酰甲胺磷杀虫剂残留量的测定方法。 本标准适用于谷类、蔬菜和植物油中甲胺磷和乙酰甲胺磷的残留量测定。     

我国粮食贸易政策两种不同观点的比较分析

<正> 大致看来,我国当前对粮食贸易政策问题的观点有以下两类:(1)自给自足的观点。该观点认为我国的粮食自给率应当保持在95%的比率以上,进口粮食应控制在5%的比率以内,只起补充作用,起品种、丰歉调剂和区域平衡的作用。(2)自由贸易的观点。该观点认为我国长期保持的95%以上的     

国内外有色金属伴共生矿综合回收利用专利竞争态势分析

<正>据国土资源部对全国600余个大型矿区的统计,含两种或两种以上可利用矿产的矿区占统计矿区总数的95%以上。已开发利用的140余种矿产中,有87种是伴共生矿,占总数的62%。全国有色金属矿区中,有85%以上是多元素综合性矿产。     

鑫苑物业:特色服务 和谐社区

<正>鑫苑物业为鑫苑品牌建设提供了强有力的价值支撑,成功实现95%的客户满意度,在业主中拥有良好口碑。党和国家领导人多次视察鑫苑社区,对鑫苑的社区环境、社区文化建设、社区党建、社区配套等各项工作给予了充分肯定和赞赏,鑫苑社区享誉全国。     

促进西部民族地区企业发展的若干思考

<正>广义来说,民族地区除包括5个民族自治区、27个自治州、83个自治县(旗)外,还包括拥有民族自治州(县)的四川省、云南省、贵州省、青海省等多民族集聚的省份。我国民族地区大多处于边疆地区,而其中95%的民族自治地区以及70%以上的少数民族人口分布在西部,从这个意义上看,西部大开发也就是民族地区的开发。     

12315提醒:微信购物、海外代购须谨慎

<正>目前,河北省石家庄市工商局12315指挥中心发布2014年度投诉受理情况分析。分析显示,虽然传统消费仍是投诉重点,但在网购、手机软件应用等新兴消费领域,消费者维权意识、证据意识普遍不强,需提高警惕。2014年度,石家庄市12315指挥中心共受理各类信息95 338件,较去年同期相比增长了37.8%;其中投诉8 850件,占受理总量的9.28%,调解成功率为95.98%。从消费分类来看,消费投诉量较大的还是服装鞋帽类,其占投诉总量     

50万t/a催化裂化装置MIP工艺改造总结

装置MIP工艺技术及其相关改造后,汽油烯烃降低了15个体积单位以上,可以达到30个体积单位以下,汽油的研究法辛烷值(RON)为88以上,装置汽柴油收率达到72%～73%,液化气收率达到12%～13%,比技改前都有所提高。     

Measuring technical and scale inefficiencies in the beer industry: Nonparametric and parametric evidence

Two alternative approaches of efficiency measurement, nonparametric and statistical, are employed to calculate three types of efficiency indexes for the U.S. beer industry over the period 1950–1986. The results indicate that the beer industry was operating at a high level of pure technical efficiency over that period. The mean value of this efficiency measure is 93.7 percent based on the nonparametric approach and 87.5 percent based on the statistical approach. The two approaches yield dissimilar values and sources for overall technical inefficiency. The overall technical efficiency index computed under the nonparametric approach stands at 91.10 percent and the observed inefficiency is found to be more due to pure technical inefficiency than to scale inefficiency. Using the statistical approach, the beer industry is found to be less overall technically efficient (68.42 percent) than indicated by the nonparametric methodology and the observed inefficiency is found to be primarily contributed to by scale inefficiency.     

Application of a bias-corrected meta-frontier approach and an endogenous switching regression to analyze the technical efficiency of conservation tillage for wheat in South Asia

Conservation tillage (CT) options are among the most rapidly spreading land preparation and crop establishment techniques globally. In South Asia, CT has spread dramatically over the last decade, a result of strong policy support and increasing availability of appropriate machinery. Although many studies have analyzed the yield and profitability of CT systems, the technical efficiency impacts accrued by farmers utilizing CT have received considerably less attention. Employing a DEA framework, we isolated bias-corrected meta-frontier technical efficiencies and meta-technology ratios of three CT options adopted by wheat farmers in Bangladesh, including bed planting (BP), power tiller operated seeding (PTOS), and strip tillage (ST), compared to a control group of farmers practicing traditional tillage (TT). Endogenous switching regression was subsequently employed to overcome potential self-selection bias in the choice of CT, in order to robustly estimate efficiency factors. Among the tillage options studied, PTOS was the most technically efficient, with an average meta-technology ratio of 0.90, followed by BP (0.88), ST (0.83), and TT (0.67). The average predicted meta-frontier technical efficiency for the CT non-adopters under a counterfactual scenario (0.80) was significantly greater (P?=?0.00) than current TE scores (0.65), indicating the potential for sizeable profitability increases with CT adoption. Conversely, the counterfactual TE of non-adopters was 23% greater than their DEA efficiency, also indicating efficiency gains from CT adoption. Our results provide backing for agricultural development programs in South Asia that aim to increase smallholder farmers’ income through the application of CT as a pathway towards poverty reduction.     

大豆稀植高产栽培技术规程

制定了大豆稀植高产栽培技术规程     

Technical Efficiency of Australian Wool Production: Point and Confidence Interval Estimates

A balanced panel of data is used to estimate technical efficiency, employing a fixed-effects stochastic frontier specification for wool producers in Australia. Both point estimates and confidence intervals for technical efficiency are reported. The confidence intervals are constructed using the multiple comparisons with the best (MCB) procedure of Horrace and Schmidt (1996, 2000). The confidence intervals make explicit the precision of the technical efficiency estimates and underscore the dangers of drawing inferences based solely on point estimates. Additionally, they allow identification of wool producers that are statistically efficient and those that are statistically inefficient. The data reveal at the 95% level that twenty-one of the twenty-six wool farms analyzed may be efficient.     

Farm heterogeneity and technical efficiency: Some results from Swedish dairy farms

This paper introduces farm-heterogeneity in measuring technical efficiency of Swedish dairy farms using farm-level data. In calculating technical efficiency which is allowed to vary over time and across farms, we control for farm-specific effects. This is possible only when panel data is available. Furthermore, we separate technical efficiency from technical change—the presence of which is indicated by a shift in the production function over time,ceteris paribus. We also calculate percentage change in technical efficiency to examine whether farm efficiencies have improved over time. Finally, a comparison of technical efficiency, elasticities of different inputs, and technical change is made across different years and panels. The data includes four panels of dairy farms observed during the period 1976–1988, excluding 1985.We thank two anonymous referees, Anders Klevmarken and Lennart Hjalmarsson for valuable comments. Financial support from SJFR, the Gothenburg Economic School Foundation, Jan Wallender and Tore Browaldh Research Foundations is gratefully acknowledged.     

A two-sector model with target-return pricing in a stock-flow consistent framework

In this paper, we build a generalized two-sector Kaleckian growth model and explore the dynamics towards long-run positions. The model incorporates conflicting claims of labour and firms over income distribution and endogenous labour-saving technical progress. Adopting a stock-flow consistent framework, our simulation experiments yield the following results. First, the ‘paradox of thrift’ and the ‘paradox of costs’ hold, meaning that lower saving rates generate higher growth rates while higher real wages generate higher profit rates, but the magnitude of the impact depends on the initial status of income distribution and monetary policy. Second, changes in autonomous labour-saving innovations might explain the phenomenon of the ‘New Economy’ of the second half of the 1990s within an alternative framework. Our simulations with a two-sector model retrieve the analytical results achieved with a one-sector Kaleckian model, with the addition of path dependence.     

THE RELATIONSHIP BETWEEN TYPES OF INNOVATION AND ORGANIZATIONAL PERFORMANCE

The relationship between adoption of administrative and technical innovations over time and its impact on organizational performance was studied. A confirmatory analysis of the data from 85 public libraries showed that, over consecutive time periods, changes in the social structure, portrayed by the adoption of administrative innovations, lead to changes in the technical system, portrayed by the adoption of technical innovations. Empirical support was also provided for Daft's (1982) framework for organizational innovation that was found to be effective in separating organizations based on their performance levels.     

A Cost Indirect Evaluation of Productivity Change in UK Universities

The study provides an empirical analysis of productivity change in publicly-funded UK universities, against a background of government policy specifically designed to enhance the productive efficiency of universities in the provision of teaching and research. The nonparametric analysis employs a cost indirect approach to measuring productivity change, taking explicit account of the quality of research output and decomposing productivity change into technical change and efficiency change. The latter is also decomposed into changes in pure technical efficiency, scale efficiency and output congestion. Changes in size efficiency are also computed. On average, productivity declined by 4% over 1989–92, mainly as a result of regressive technical change. Evidence of biased technological change was found, with the frontier shifting out in favour of the teaching outputs and in relative to the research output.     

Separating Technical Change from Time-Varying Technical Inefficiency in the Absence of Distributional Assumptions

This paper proposes an alternative model for separating technical change from time-varying technical inefficiency. The proposed formulation uses the general index, developed by Baltagi and Griffin (1988), to model technical change in the production frontier function and a quadratic function of time, as in Cornwell, Schmidt and Sickles (1990), to capture the temporal pattern of technical inefficiency. In such a setting, all parameters associated with the rate of technical change and the temporal pattern of technical inefficiency are identified separately. Moreover, the proposed formulation is independent of any distributional assumption concerning the one-sided error term associated with technical inefficiency, and it can be estimated in a single stage with non-linear FGLS. Empirical results based on a translog production frontier, and estimates of technical inefficiency and technical change are presented for the UK dairy sector over the period 1982–1992.