三氯乙酰氯生产中副产物的检测和表征

三氯乙酰氯生产过程中,有一种对生产工艺有不良影响的副产物,通过对副产物进行气质的分析,解决了工艺中的实际问题,并用气质联用仪进行了表征.     

Science Letters： Proteomic analysis of the serum in patients with idiopathic pulmonary arterial hypertension

Idiopathic pulmonary arterial hypertension （IPAH） is a rare disease of unknown etiology. The exact pathogenesis of pulmonary arterial hypertension is still not well known. In the past decades, many protein molecules have been found to be involved in the development of IPAH. With proteomic techniques, profiling of human plasma proteome becomes more feasible in searching for disease-related markers. In present study, we showed the protein expression profiles of the serum of IPAH and healthy controls after depleting a few high-abundant proteins in serum. Thirteen spots had changed significantly in IPAH compared with healthy controls and were identified by LC-MS/MS. Alpha- 1-antitrypsin and vitronectin were down-regulated in IPAH and may be valuable candidates for further explorations of their roles in the development of IPAH.     

柴达木盆地狮子沟地区咸水湖相原油饱和烃地球化学特征

柴达木盆地第三系原油大部分为咸水湖相沉积的烃源岩生成,其有机质主要来源于陆生高等植物。应用有机地球化学GC／MS分析技术,对采自柴达木盆地狮子沟地区6口油井的原油样品进行了饱和烃色质分析。分析结果表明：原油样品正构烷烃分布完整,没有受到生物降解作用,在C20～C30内呈现明显的偶奇优势,Pr/Ph值非常低,在0．26．0．33之间,具有强植烷优势;在萜烷类化合物色质图中,伽马蜡烷相对丰度很高,具强升藿烷翘尾巴优势的典型特征;C27、C28、C29甾烷分布呈“V”字型,且以％甾烷为主峰,暗示其母质有咸水湖相水生生物输入。另外选取了甾烷参数C2920S／（S＋R）和C29ββ（ββ＋αα）评价原油成熟度特征,结果表明所有原油样品基本处于低成熟和刚成熟范围内。通过综合分析原油饱和烃色质图特征及各项生标参数,认为柴达木盆地狮子沟地区原油主要为咸水、强还原湖相沉积的烃源生成。     

刺芫荽挥发性成分研究

以野生刺芫荽为原料,采用同时蒸馏萃取法提取其挥发性成分,应用气相色谱—质谱法对提取物进行化学成分分析.实验结果表明,野生刺芫荽提取物中共鉴定出24种化合物,占总峰面积的65.94％,质量分数达到1.00％以上的有6种物质,其挥发性成分中醛酮类化合物相对质量分数达到58.05％.     

国标中食品硼砂检测方法的比较分析

对食品中硼砂含量的分光光度法、电感耦合等离子体发射光谱法（ICP—AES）和电感耦合等离子体质谱法（ICP—MS）、离子色谱法（IC）等检测方法进行比较研究。结果表明,虽然分光光度法、ICP—AES、ICP—MS为国标GB／T21918--2008中采用的方法,但均存在一定的局限性,离子色谱法因快速、方便、环保而被逐步推广。     

Investigation of the materials found in the studio of Francis Bacon (1909–1992)

Abstract

The investigation of materials found in Bacon's studio is reported. The contents of the studio are examined and interpreted to identify the materials and colours most favoured by Bacon, and the range of media used. A small number of colours appear to have been heavily used. Some objects used as tools in the painting process are also investigated and explain textures seen in paint in his works. Samples of selected materials from the studio are analysed to identify the components of paints (pigments, extenders, and binders) used by Bacon. This investigation is part of a wider project examining his materials and techniques. The analytical information obtained here from the studio helps to clarify the statements made by Bacon in interviews regarding his use of materials and is proving useful in the identification of materials in his paintings, in order to help with the conservation and authentication of his works.     

评析“概念性教学法”的理论与实践

本文从理论和实践两个层面评析本世纪兴起的外语教学流派概念型教学法 。全文包括四个部分: 1)剖析概念型教学法的语言观、 习得观和教学观; 2)阐述其教学过程的5个阶段（即解释、物化、交际活动、言语化和内化）;3）报告本文作者对概念型教学法利弊的思考;4）预测概念型教学法的未来走向。     

ICP—MS测定木瓜中26种微量元素

采用电感耦合等离子体质谱仪（ICP—MS）,同时测定了木瓜中的26种微量元素。结果表明木瓜中K、Na、Ca、Mg等元素的含量都比较丰富,并讨论了这些有益元素与人体健康的关系。该方法的回收率为96．5％-105．6％,RSD值为0．26％-2．03％,结果可信度高。该法精密度高、准确性好、干扰较少、快速简单,可用于质量控制。并为中药材木瓜中26种元素含量测定提供了方法。为进一步开发和利用木瓜提供了科学依据。     

中小强度有氧运动后大鼠右心室肌蛋白质组差异表达的研究

目的:运用蛋白质组学的理论和方法来研究中小强度有氧运动对大鼠右心室肌蛋白质组的影响。方法:将20只SD雄性大鼠随机分为对照组和运动组(各1组,每组n=10)。采用中小强度运动负荷跑台训练建立运动实验模型,提取右心室肌组织全蛋白样品,采用双向凝胶电泳进行蛋白样品分离。运用ImageMaster 2D Platinum图像分析软件对2-DE胶进行分析,通过图像分析,选取运动后差异表达量≥5倍的蛋白点,用串联飞行时间质谱蛋白质仪(ULGRAFL-FLEX-TOF/TOF)进行质谱鉴定。结果:经过8周运动后,在2-DE图谱上运动组和对照组检测到的蛋白质点分别为(547±18)个和(530±14)个,匹配率分别为(71.34±3.25)%和(70.28±2.38)%。运动后共有58个蛋白质点发生了变化:表达量上调≥2倍的点有33个,下调≥2倍的点有25个,其中上调≥5倍的点有8个,下调≥5倍的点有8个。选择差异表达量≥5倍的蛋白质点为目标蛋白质进行质谱分析,共鉴定出了5个差异表达蛋白质点。结论:在长期中小强度有氧运动后,大鼠右室肌蛋白质组发生了明显的差异性表达,这些差异性表达的蛋白质点为进一步观察在运动应激状态下对心脏...     

Theoretical study of NO adsorbed on the surface of TiO_2(110) cluster model

INTRODUCTION The adsorption of gas molecules on metals,metal oxides or alloys had been researched widelyto find a solution for the problem of air pollution(Davies and Craig Jr., 2003; Yanagisawa, 1996;Tominaga et al., 1999). NO could be adsorbed onthe particle surface and desorbed as N2 from thesurface by temperature programmed desorption(TPD) (Davies and Craig Jr., 2003; Yanagisawa,1996). The calculation of cluster model was estab-lished with molecular orbital (MO) theory (Ry…