二噁英的理化性质及在乳及乳制品中污染的研究进展

本文主要分析了二噁英的理化性质,重点介绍了乳及乳制品中二噁英的污染情况,并提出有效措施给予预防和解决,以有效降低二噁英在乳及乳制品中的危害性,确保乳及乳制品行业的健康发展。通过对二噁英的理化性质进行研究,为乳及乳制品的安全生产提供可靠保障,以实现经济与社会效益的最大化。     

稻鳅共生种养模式试验研究

[目的]稻鳅共生是典型的稻田综合利用模式,符合生态农业发展方向。通过对稻鳅共生生态系统的生理生态学机制开展试验研究,为进一步推广稻鳅共生种养模式提供科学依据。[方法]采用田间试验方法,以水稻单作为对照,研究了不同泥鳅养殖密度下的稻鳅共生对水稻农艺性状、土壤理化性质、水稻产量构成的影响,并对稻鳅共生种养模式进行了经济效益分析。[结果]与对照处理相比,水稻长势在株高、有效分蘖率、根长等方面有一定提高。养殖田水稻株高增高了3%,有效分蘖率提高了8%~11%,根长提高了8.8%~31.3%。在土壤理化性质方面,与对照相比,土壤容重降低了7.1%~21.2%,孔隙度增加了4.1%~14.7%。实验前后养殖田内土壤有机质增加了3.5%~26.5%,对照田降低了2.5%~5.8%。土壤肥力(氮、磷、钾)减少,但减少幅度小于对照处理。稻鳅共生种养模式下水稻产量提高了5%~25%,同时稻田增收泥鳅1 725~3 375kg/hm2,净收入为1.836 0万~2.307 0万元/hm2,经济效益提高了3.65~4.84倍。稻鳅共生种养模式中泥鳅的养殖密度为30万尾/hm2时稻田的生态效益和经济效益最佳。[结论]稻鳅共生有效改善了土壤理化性质,促进了水稻的生长,提高了稻田产量和产值。     

甜菊糖苷的功能特性及其在饮料工业中的应用

甜菊糖苷作为天然的高甜度、低热量甜味剂,已被广泛应用于食品、饮料中。本文阐述了甜菊糖苷的化学结构、理化功能特性,综述了甜菊糖苷的研究现状以及在饮料工业中的应用,指出其发展前景广阔,为甜菊糖苷的深入研究提供参考。     

润肤霜的制备工艺及其性能研究

使用混合膜生成法和瞬间成皂法配制润肤霜,论文通过单因素试验法探究了1618醇的含量、乳化温度和乳化时间对润肤霜性能的影响。通过对试验数据进行分析得出如下结论:1618醇含量为4.0%、乳化温度为75~80℃、乳化时间为7~9min时产品质量合格,满足QB/T 1857—2013《润肤膏霜》中对性能的要求。     

超微红茶粉的理化性质和抗氧化活性的研究

本文采用超微粉碎技术制备超微红茶粉,研究超微粉碎时间对红茶粉末的显微结构、功能特性、流动性及抗氧化活性的影响。结果表明,超微粉碎改善了红茶的理化性质,增加了功效成分溶出率,提高了其抗氧化活性,其中20 min粉碎时间制得的超微红茶粉理化性质变化显著,30 min粉碎时间制得的超微红茶粉抗氧化活性较强。     

蛋白质溶胶的流变特性及应用研究进展

介绍了蛋白质和改性蛋白质溶胶的流变特性，指出蛋白质溶胶的流变特性主要为非牛顿流体的假塑性流体，且其流变特性受诸多因素的影响；蛋白质经过改性后，流动性有较大的改善。最后概述了蛋白质溶胶流变特性方面的应用。     

玻璃纤维增强塑料夹砂管初始力学性能检测的研究

由玻璃纤维增强塑料夹砂管的环刚度、刚度等级概念分析了环刚度设计与检测的基本方法,探讨挠曲水平、轴向拉伸强力和环向拉伸强力检测方法,比较分析了各种方法的优缺点与适用范围,对理解及掌握玻璃纤维增强塑料夹砂管初始力学性能的概念及相关检测方法具有一定参考意义。     

多孔结构建筑材料力学性能的有限元分析

多孔材料是一种新兴的材料,制备较易,成本较低。相对于一般连续介质材料而言,多孔材料具有比强度高、比表面积高、相对密度低、重量轻、隔音、隔热等优点。它最大的特点是具有排列规则、大小可调的孔道结构,在建筑材料中也有很多的应用。因此,对非均匀孔洞与均匀孔洞建筑材料力学性能的研究是很重要的课题。论文通过建立非均匀孔洞和均匀孔洞的有限元模型,对比分析两种模型的受力性能,更好地进行多孔建筑材料的推广和使用。     

Individual labour income,stock prices and whom it may concern

In this paper, a panel model which describes the relationship between individual labour income and stock prices in Germany is estimated. The specification allows the individuals to cluster concerning the model parameters that describe first the individual labour income dynamics and second the relationship between the individual labour income and financial markets. Methodically, a Bayesian model-based non-Gaussian panel data approach, proposed by Juarez and Steel (2010a), is used. A group of individuals with a high cluster assignment probability is found. The characteristics of this group, whose individuals share the same autoregressive dynamics and a common, relatively high dependence on financial markets, are investigated further. It can be shown that this group has a statistically significantly different partition of the major occupational groups. This leads to implications for various branches of the literature, such as the pricing of human capital contracts, the hedging of individual income risk, portfolio optimization or asset pricing.     

Analysis of LPG,electric and induction cookers during cooking typical Ecuadorian dishes into the national efficient cooking program

This research aims to analyze cooking parameters in liquefied petroleum gas (LPG), electric resistance and induction stoves for eight dishes of the Ecuadorian cuisine. During tests, it has been monitored the temperature, time, electrical grid parameters, concentrations of CO and CO₂. In addition it has been studied the microbiological and physiochemical changes produced by the thermal treatment in food and a discriminative triangular test for determining the differences in the consumers perception between samples made with induction and LPG based stoves. The results showed which even with an exhaust hood working, there was still a significant value of concentration of CO and CO₂ during cooking with a LPG stoves. As a result of these analyses the induction stove shows a better response during the heating process and energy efficiency which have influence in temperatures, taste, vitamin preservation, cooking times, energy consumption and cost to the user.