国内外丁辛醇市场分析及对策与建议

通过对丁辛醇国际市场历史数据及现状的分析,预测了未来世界丁辛醇的供需状况。重点对国内近年丁辛醇发展状况、现有生产装置、近年进出口情况以及消费结构现状等进行分析,采用多种预测方法对未来国内市场需求进行了预测,并根据目前在建及拟建丁辛醇装置的项目进展情况,对未来5～7年国内丁辛醇供需态势进行了分析。依据国外丁辛醇发展进程和经验,针对目前国内丁辛醇建设的投资热,提出了自己的观点和建议。     

世界丁辛醇生产技术与市场分析

本文系统阐述了丁辛醇生产技术及发展趋势，介绍了国内外丁辛醇的供需及消费情况，并对今后我国丁辛醇工业发展提出了建议。     

丁辛醇产需分析与生产技术

全面分析了世界丁辛醇生产及需求情况，并系统介绍了国内外丁辛醇生产技术及进展。对今后我国丁辛醇工业发展提出了建议。     

世界丁辛醇市场分析及发展建议

介绍了2007年世界丁辛醇供需情况,分析了中国丁辛醇价格及进出口情况,并提出了发展建议。     

丁辛醇现状及市场前景

介绍了世界丁辛醇生产消费现状及发展前景,提出发展我国丁辛醇生产的建议.     

丁/辛醇市场分析及预测

介绍了国内外丁/辛醇的生产能力、产量和市场需求,对国内外丁/辛醇的生产、应用技术现状和市场发展趋势进行了分析与预测,并提出了发展建议。     

丁辛醇合成工艺评价及选择

本文介绍了合成丁辛醇技术，对丁辛醇装置主要专利技术的特点做了评价，并举例炼油化工一体化企业中建设丁辛醇装置技术选择及总体平衡。     

丁辛醇的技术进展与市场前景

文章主要对丁辛醇的生产方法进行详细的阐述及对比,并对羰基合成法的催化剂的发展进行了研究。对丁辛醇的国内外发展现状、市场需求、前景进行了论述,并指出存在的问题即采取的措施建议。     

丁辛醇的生产技术进展和消费现状分析

阐述了丁辛醇国内外生产技术进展情况,重点介绍了丙烯羰基化合成丁辛醇催化剂的研究进展情况,指出研究开发单程不循环工艺以及开发新型高效配位体改性铑催化剂是发展方向。文章对我国丁辛醇的生产状况和消费现状进行了分析。     

国内外丁辛醇市场现状及未来预测

对世界正丁醇和辛醇供需状况进行了分析和预测;对我国正丁醇和辛醇的生产、进口、消费结构等现状进行了分析,对未来的需求进行了预测;结合国外丁辛醇的发展历程,针对目前国内丁辛醇的投资较热情况提出了思考和建议。     

Essential Oils as Allelochemicals and Their Potential Use as Bioherbicides

Essential oils were extracted from 32 aromatic plants and evaluated for allelopathic properties. The major components of the oils were identified by gas chromatography and GC-MS. Extracts from Origanum syriacum, Micromeria fruticosa, and Cymbopogon citratus were selected for further study. The germination of several species, including wheat, was strongly inhibited by essential oils when applied at 20–80 ppm. Essential oils mixed with the top 0.5 cm of soil inhibited germination of wheat and Amaranthus seeds. This effect depended on the type of soil. The possible use of essential oils as herbicides is discussed.     

教育是基础 实践是关键

德育工作就是通过引导人们对自己行为的自觉性认识来培养其自律意识,将社会的思想道德要求转化为人们的内在需要,形成正确的价值观念和道德品质,进而规范自己的行为.但事实上,德育工作要取得成效,仅靠人们的自律是不够的,还必须依靠管理、法律等他律手段. 高尚思想道德的培养,不仅要靠耐心细致的思想教育,还要靠科学规范的严格管理.二者相辅相成,缺一不可.把社会主义的思想道德融于科学有效的管理之中,把自律和他律、内在约束和外在约束、教育和管理、提倡和禁止有机结合起来,这才是提高德育工作实效和水平的重要途径.     

Randomized trials for the real world: making as few and as reasonable assumptions as possible

The strength of the randomized trial to yield conclusions not dependent on assumptions applies only in an ideal setting. In the real world various complications such as loss-to-follow-up, missing outcomes, noncompliance and nonrandom selection into a trial force a reliance on assumptions. To handle real world complications, it is desirable to make as few and as reasonable assumptions as possible. This article reviews four techniques for using a few reasonable assumptions to design or analyse randomized trials in the presence of specific real world complications: 1) a double sampling design for survival data to avoid strong assumptions about informative censoring, 2) sensitivity analysis for partially missing binary outcomes that uses the randomization to reduce the number of parameters specified by the investigator, 3) an estimate of the effect of treatment received in the presence of all-or-none compliance that requires reasonable assumptions, and 4) statistics for binary outcomes that avoid some assumptions for generalizing results to a target population.     

Ketocoumarins as photosensitizers and photoinitiators

Several 3-ketocoumarins with alkoxy or dialkylamino substituents in the 7 position, which are efficient sensitizers for crosslinkable polymers, were evaluated as photoinitiators. Proper combinations of certain derivatives of these ketocoumarins with activators such as amines, acetic acid derivatives, and alkoxypyridinium salts gave quantum yields for initiated radical polymerization much higher than that obtained from the Michler's ketone/benzophenone combinations. For each class of activators the dependence of the efficiency of polymerization on the redox properties of the ketocoumarins is explained in terms of charge transfer or electron transfer from the activator to the excited ketocoumarin (acetic acid and amine activators, respectively) or electron transfer in the opposite direction (pyridinium salt activators).     

天然气储备与消耗及应对措施研究

概括了世界天然气的储备与消耗总体情况,地下储气库、LNG作为主要的储备方式,管道末段及储罐作为天然气消耗应急调峰措施.并结合我国实际情况,提出一些天然气储备及应对措施的建议,为相关企业和部门提供一定依据.     

浅析课程教学与教学相长

教学相长既是教学理念,又是教学方法,它是古人对教学和认知的一种哲学思想。通过目前对教学相长认识现状的分析,结合课程教学,构建了课程教学中的教学相长模型。该模型包含5种形式的教学相长模式,囊括了目前人们对教学相长的所有认识。通过具体的教学实践,阐述了5种教学相长模式的具体应用,证明了这5种模式在课程教学中的有效性,为教学相长在新时期的应用提供了实践和理论依据。     

高校多媒体教学的优劣与对策

多媒体教学是目前高校教学改革的一个亮点,得到了广大教师和学生的青睐.本文归纳总结了高校多媒体教学的优势,分析了当前多媒体教学存在的问题,提出了改善多媒体教学的对策或建议,以作抛砖以玉.     

对氯虫苯甲酰胺和嘧菌酯等的制剂及开发思路的分析和评价

以氯虫苯甲酰胺和嘧菌酯两个新农药的制剂开发的过程为例,用药物传递技术的理念逐一进行了分析和点评。进而对鱼尼汀受体作用剂类杀虫剂和甲氧基丙烯酸类杀菌剂两类农药制剂的开发思路进行了论述,对各种剂型的产品特点分别进行了评价。同时,对两类新药制剂产品开发和推广过程中所折射出的农药制剂领域的共性技术问题进行了总结,以使相关的技术人员和经营者能从中得到启示。     

Numerical simulation of DSC and TMDSC curves as well as reversing and nonreversing curve separation

The basic physical meaning of temperature modulation for DSC is an arguable research topic, and its interpretation affects the development of thermal analysis and polymer science. This article studies the basic physical meaning of TMDSC by numerical simulation. DSC and TMDSC output curves are computed for a sample with step changes in its specific heat and for a sample with crystallites melting over the temperature range. The TMDSC curves are further analyzed to obtain the reversing and nonreversing components. It is shown that separation of the reversing and nonreversing components from the underlying heat flow cannot be justified. Some common misconceptions regarding TMDSC are discussed as well. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007