荆芥挥发油的超临界CO2萃取分离及GC-MS分析

通过正交试验研究了超临界CO2萃取荆芥挥发油的最佳工艺条件,利用GC-MS联用技术对荆芥挥发油化学成分及相对含量进行测定.结果表明,萃取荆芥挥发油最佳工艺条件为萃取压力25 MPa、萃取温度45℃、萃取时间100 min、CO2流量为30 kg/h.在最佳工艺条件时,荆芥挥发油得率为1.316 3%.荆芥挥发油的主要成分为胡薄荷酮和薄荷酮.此外,还发现了荆芥挥发油中含有二氢茉莉酮、土曲霉酮等成分.为了提纯荆芥挥发油,首次采用了二级分离法.与一级分离法相比,二级分离法能够有效降低荆芥挥发油中不饱和脂肪酸及其酯的含量,显著提高胡薄荷酮和薄荷酮的含量.     

建筑装饰材料污染物散发影响因素研究

运用集总参数数学模型,利用文献提供的数据和Matlab 5．0软件模拟和分析了室内干性多孔材料(地毯)、涂料类一次衰减源和墙体在不同组合情况下对室内污染物浓度的贡献情况．模拟结果表明：涂料类一次衰减源对室内污染造成较大影响,并且对干性多孔材料散发也造成较大影响,呈正相关,但它对室内污染持续时间较短;汇效应作用与吸附和解析系数的比值密切相关,汇效应越大,室内污染物浓度受其影响的强度和广度越大．     

带晕盘状天体内、外的零测地线方程的解

本文推广透明球状暗物质内郎和外部零测地线方程[1,2]到带晕盘状天体的情况,给出了三个运动积分和一套叠代方程,这个结果对今后研究银河系中暗物质的分布及存在会影响河外星系位置等方面的研究将是重要的。最后,讨论了数值运算中的某些困难。     

Analysis of volatile components in a Chinese fish sauce, Fuzhou Yulu, by gas chromatography-mass spectrometry

Volatile components of Fuzhou Yulu, a Chinese fish sauce, were analyzed by gas chromatography-mass spectrometry （GC-MS）, and two pretreatment methods, i.e., purge and trap （P＆T） GC-MS and ethyl acetate extraction followed by GC-MS, were compared. P＆T-GC-MS method determined 12 components, including sulfur-containing constituents （such as dimethyl disulfide）, nitrogen-containing constituents （such as pyrazine derivatives）, aldehydes and ketones. Ethyl acetate extraction fol- lowed by GC-MS method detected 10 components, which were mainly volatile organic acids （such as benzenepropanoic acid） and esters. Neither of the two methods detected alcohols or trimethylamine. This study offers an important reference to determine volatile flavor components of traditional fish sauce through modem analysis methods.     

随机量子空间理论关于粒子物理及宇宙学：统一场论新版本

随机量子空间（SQS）理论是统一场论新版本,基于三个基本假设：高斯几率假设、质数假设、真空子假设。据此建立起理论框架,导出的许多结果与实验数据相符。     

基于G1序-物元可拓模型的重庆庭院式农宅绿色舒适度评价

针对舒适度研究,当前缺乏从建筑及建筑环境角度进行系统性影响因素研究,基于绿色建筑评价标准和绿色农房建设导则等,在“巴蜀美丽庭院示范片”建设的政策指引下,从建筑设计、建筑室内环境和场地生态与室外物理环境3个方面构建重庆庭院式农宅绿色舒适度评价指标;利用G1序法确定指标的权重,物元可拓模型对庭院式农宅进行舒适度评价,以此确定舒适度等级,最后以重庆市庭院式农宅为例,进行环境性能模拟和现场实测,通过专家打分获取评价结果,并通过模糊综合评价方法和主观舒适度问卷调查对评价体系进行验证,结果表明舒适度评估结果一致,验证了评价模型的可行性,为重庆地区庭院式农宅的设计与改造提供优化方向。     

宇宙、物质与能量

从现代物理学出发,对现代宇宙学的新观点进行了系统分析,并从科学与哲学的角度研究了宇宙,物质与能量之问的关系。     

Newton’s substance monism, distant action, and the nature of Newton’s empiricism: discussion of H. Kochiras “Gravity and Newton’s substance counting problem”

This paper is a critical response to Hylarie Kochiras’ “Gravity and Newton’s substance counting problem,” Studies in History and Philosophy of Science 40 (2009) 267-280. First, the paper argues that Kochiras conflates substances and beings; it proceeds to show that Newton is a substance monist. The paper argues that on methodological grounds Newton has adequate resources to respond to the metaphysical problems diagnosed by Kochiras. Second, the paper argues against the claim that Newton is committed to two speculative doctrines attributed to him by Kochiras and earlier Andrew Janiak: i) the passivity of matter and ii) the principle of local causation. Third, the paper argues that while Kochiras’ (and Janiak’s) arguments about Newton’s metaphysical commitments are mistaken, it qualifies the characterization of Newton as an extreme empiricist as defended by Howard Stein and Rob DiSalle. In particular, the paper shows that Newton’s empiricism was an intellectual and developmental achievement that built on non trivial speculative commitments about the nature of matter and space.