CHEMICAL SENSITIZATION OF TABULAR－GRAIN EMUL－SIONS IN THE PRESENCE OF SENSITIZING DYE

ＣＨＥＭＩＣＡＬＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＴＡＢＵＬＡＲ－ＧＲＡＩＮＥＭＵＬ－ＳＩＯＮＳＩＮＴＨＥＰＲＥＳＥＮＣＥＯＦＳＥＮＳＩＴＩＺＩＮＧＤＹＥ￥ＣＨＥＭＩＣＡＬＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＴＡＢＵＬＡＲ－ＧＲＡＩＮＥＭＵＬ－ＳＩＯＮＳＩＮＴ...     

THE PREPARATION OF HIGH－PURITY，ULTRAFINE AND MONODISPERSED TITANIUM DIOXIDE POWDER FROM TITANIUM TETRACHLORIDE BY HYDROLYSIS OF TITANIUM ALKOXIDES

ＴＨＥＰＲＥＰＡＲＡＴＩＯＮＯＦＨＩＧＨ－ＰＵＲＩＴＹ，ＵＬＴＲＡＦＩＮＥＡＮＤＭＯＮＯＤＩＳＰＥＲＳＥＤＴＩＴＡＮＩＵＭＤＩＯＸＩＤＥＰＯＷＤＥＲＦＲＯＭＴＩＴＡＮＩＵＭＴＥＴＲＡＣＨＬＯＲＩＤＥＢＹＨＹＤＲＯＬＹＳＩＳＯＦＴＩＴＡＮＩＵＭＡＬＫＯ...     

第51届国际水会议（IWC）论文摘要

第５１届国际水会议（ＩＷＣ）论文摘要具有“Ｍ”通道结构开放式给水分离器使用的新型高速螺旋卷型ＭＦ—ＵＦ—ＲＯ组件的设计——ＢＵＲＮＥＴＴＭＳＣＨＮＥＩＤＥＲ，ＲＩＣＨＡＲＤＡ．ＲＩＤＤＬＥ，ＩＷＣ９０—３９根据膜系统中流体错流流动会使悬浮固体在膜表面...     

ENHANCEMENT OF ENERGY TRANSFER FROM THE TERMINAL CHROMOPHORE OF POLYETHER TO EUROPIUM CATION（Ⅲ）VIA C

ＥＮＨＡＮＣＥＭＥＮＴＯＦＥＮＥＲＧＹＴＲＡＮＳＦＥＲＦＲＯＭＴＨＥＴＥＲＭＩＮＡＬＣＨＲＯＭＯＰＨＯＲＥＯＦＰＯＬＹＥＴＨＥＲＴＯＥＵＲＯＰＩＵＭＣＡＴＩＯＮ（Ⅲ）ＶＩＡＣＯＭＰＬＥＸＡＴＩＯＮＥＮＨＡＮＣＥＭＥＮＴＯＦＥＮＥＲＧＹＴＲＡＮＳＦＥＲ...     

矿泉水中锗含量的快速测定：SAF,CTMAB,光度法

矿泉水中锗含量的快速测定──ＳＡＦ、ＣＴＭＡＢ、光度法张世红，吴立昌ＥＣＰＲＥＳＳＥＤＴＥＲＭＩＮＡＴＩＯＮＯＦＧＥＲＭＡＮＩＵＭＩＮＭＩＮＡＲＡＬＷＡＴＥＲ１前言据资料表明，锗的分析方法有重量法、容量法。溶剂萃取比色法、原子吸收光度法、荧光熄灭法等...     

Y－TYPE ZEOLITES AS MICRO－REACTORS FOR PHOTOCHEMICAL PREPARATION OF LARGE－RING COMPOUNDS

Ｙ－ＴＹＰＥＺＥＯＬＩＴＥＳＡＳＭＩＣＲＯ－ＲＥＡＣＴＯＲＳＦＯＲＰＨＯＴＯＣＨＥＭＩＣＡＬＰＲＥＰＡＲＡＴＩＯＮＯＦＬＡＲＧＥ－ＲＩＮＧＣＯＭＰＯＵＮＤＳ￥ＴＯＮＧＺｈｅｎｈｅ；（ＴＵＮＧＣｈｅｎｈｏ）；ＷＵＬｉｚｈｕ（ＩｎｓｔｉｔｕｔｅｏｆＰｈｏ...     

高效凝胶渗透色谱法研究醇酸树脂的分子量分布

高效凝胶渗透色谱法研究醇酸树脂的分子量分布张泉福（化工部常州涂料化工研究院）ＳＴＵＤＹＯＮＴＨＥＭＷＤＯＦＴＨＥＡＬＫＹＤＲＥＳＩＮＳＢＹＨＩＧＨＰＥＲＦＯＲＭＡＮＣＥＧＥＬＰＥＲＭＥＡＴＩＯＮＣＨＲＯＭＡＴＯＧＲＡＰＨＹ￥ＺｈａｎｇＱｕａｎｆｕ　ｅ...     

换热器最大管程传热特性比的稳健性选型方法

换热器最大管程传热特性比的稳健性选型方法ＴＨＥＲＯＢＵＳＴＤＥＳＩＧＮＭＥＴＨＯＤＳＦＯＲＳＥＬＥＣＴＩＮＧＡＨＥＡＴＥＸＣＨＡＮＧＥＲＡＴＭＡＸＩＭＵＭＫ／ＰＩＲＡＴＩＯＩＮＳＩＤＥＰＩＰＥＳ范明舫，谭良１引言在评价换热器的综合性能的指标中，Ｓｍｙ...     

用混合表面活性剂制备柴油—水微乳液

用混合表面活性剂制备柴油──水微乳液ＰＲＥＰＡＲＡＴＩＯＮＯＦＤＩＥＳＥＬ－ＷＡＴＥＲＭＩＣＲＯＥＭＵＬＳＩＯＮＦＲＯＭＭＩＸＩＮＧＳＵＲＥＡＣＴＡＮＴ范绮莲，李蒙俊，邹红林１前言燃油掺水形成乳化液，使燃烧更加完全，从而提高燃烧率及减少废气对环境的污...     

冷粘制鞋用表面处理剂的制备

为了提高难粘制鞋材料的可粘附性,采用ＣＲ—ＮＲ—ＭＭＡ共聚物、苯酚及配合溶剂对ＰＶＣ、ＰＵ、尼龙等鞋用材料进行表面预处理,使普通鞋用胶对难粘材料的粘接强度得到很大提高。     

R-SMA增容PA6/PP共混物的形态结构与流变行为

采用R-SMA为增容剂制备PA6/PP共混物,讨论了R-SMA对共混物形态结构和流变行为的影响。     

R—SMA共混合金的研究进展

无规苯乙烯-马来酸酐共聚树脂(R-SMA)可作为塑料合金中提高耐热性、易加工性等性能的树脂组分,其本身又是塑料合金的相容剂,且具有成本低的优势。本文较详细地介绍了R-SMA与PVC、ABS、聚碳酸酯(PC)、聚酰胺(PA)、聚对苯二甲酸丁二醇酯(PBT)等通用及工程树脂的塑料合金的技术进展。     

R-SMA树脂的合成工艺

介绍了普通型和抗冲型两类苯乙烯—马来酸酐无规共聚物（R－SMA）的合成工艺。在对比溶液、本体—悬浮、本体三种聚合方法的优、缺点之后，详细叙述了本体法的特点，包括典型配方、工艺条件以及聚合流程，浅析了GPPS／HIPS装置转产R—SMA的可行性。     

Semicontinuous thermal bulk copolymerization of styrene and maleic anhydride: Experiments and reactor model

Thermal bulk copolymerization of styrene (St) and maleic anhydride (MAH) has been carried out at 110–130°C and up to around 55 wt % conversion in a stirred tank reactor with an anchor impeller to prepare the random copolymer of St–MAH (R-SMA). A series of experiments in semicontinuous monomer adding process were done to investigate the effects of operating condition on monomer conversion, copolymer composition, and its uniformity. It has been shown that a random copolymer with constant composition can be obtained by semicontinuous copolymerization. A reactor model was developed to simulate the copolymerization processes. The numerical method in which the gel effect on the copolymerization is incorporated has exhibited excellent agreement between the model calculation and the experimental data. However, when using the assumption that (1) k₂₂ = 0; (2) k₂₁[M₁] ≫ k₁₂[M₂]; and (3) (R₁/2k_t)^1/2 is a constant, an analytical solution to the model was found to be available also. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:1905–1912, 1998     

全氟聚醚聚合物及其功能复合材料的研究进展

全氟聚醚（PFPE）聚合物具有极低的表面张力、低摩擦系数、优异的润滑性能和良好的疏水疏油性能，被广泛用作航空航天、核工业、真空、电子等领域的润滑材料以及合成功能复合材料的反应中间体。近年来，基于PFPE聚合物的含氟功能复合材料在一些新兴领域受到广泛关注。本文首先介绍了PFPE聚合物在润滑材料领域最新的研究进展，重点阐述了目前PFPE润滑剂在抗磨、防锈和PFPE基础油抗爬移方面存在的不足，并分析了其原因；其次概述了PFPE聚合物在功能涂层、含氟聚氨酯材料、氟橡胶以及类玻璃（Vitrimers）材料方面的研究进展和应用前景，并介绍了一些含氟功能复合材料的制备工艺；最后展望了PFPE聚合物未来的研究重点和发展趋势，旨在为拓宽PFPE聚合物的应用领域，开发高附加值的PFPE衍生产品提供思路。     

Electrospinning jets and polymer nanofibers

In electrospinning, polymer nanofibers are formed by the creation and elongation of an electrified fluid jet. The path of the jet is from a fluid surface that is often, but not necessarily constrained by an orifice, through a straight segment of a tapering cone, then through a series of successively smaller electrically driven bending coils, with each bending coil having turns of increasing radius, and finally solidifying into a continuous thin fiber. Control of the process produces fibers with nanometer scale diameters, along with various cross-sectional shapes, beads, branches and buckling coils or zigzags. Additions to the fluid being spun, such as chemical reagents, other polymers, dispersed particles, proteins, and viable cells, resulted in the inclusion of the added material along the nanofibers. Post-treatments of nanofibers, by conglutination, by vapor coating, by chemical treatment of the surfaces, and by thermal processing, broaden the usefulness of nanofibers.     

Possible allelopathic constituents ofCoffea arabica

The aqueous extracts of leaves, stems, and roots ofCoffea arabica significantly inhibited the seed germination and radicle growth of rye grass, lettuce, and fescue. When the extracts were diluted to 1% solution, significant suppression of lettuce growth was still found and was particularly pronounced in the extract of young seedlings. The paper chromato-gram of the ether fraction of an aqueous extract of coffee leaves was bioassayed with lettuce seeds and revealed a remarkable inhibition throughout the chromatogram except for the segment ofR _f 0.00–0.12. Paper without spotting extract was used as a standard. The phytotoxins present in coffee tissue were identified by paper and thin-layer chro-matography and mass spectrometry. The compounds include caffeine, theobromine, theophylline, paraxanthine, scopoletin, and chlorogenic, ferulic,p-coumaric,p-hydroxybenzoic, caffeic, and vanillic acids. All compounds except caffeic acid exhibited significant phytotoxicity to lettuce growth at a concentration of 100 ppm.Paper no. 222 of the Scientific Journal Series, Institute of Botany, Academia Sinica, Taiwan, and Journal Article 3582 of the Agricultural Experiment Station, Oklahoma State University, Stillwater, Oklahoma. The abstract was published in the Proceedings of 63rd Annual Meeting of American Societies for Experimental Biology, held on April 1–10, 1979, Dallas, Texas.     

Graphene-Based Sensors for the Detection of Bioactive Compounds: A Review

Over the last years, different nanomaterials have been investigated to design highly selective and sensitive sensors, reaching nano/picomolar concentrations of biomolecules, which is crucial for medical sciences and the healthcare industry in order to assess physiological and metabolic parameters. The discovery of graphene (G) has unexpectedly impulsed research on developing cost-effective electrode materials owed to its unique physical and chemical properties, including high specific surface area, elevated carrier mobility, exceptional electrical and thermal conductivity, strong stiffness and strength combined with flexibility and optical transparency. G and its derivatives, including graphene oxide (GO) and reduced graphene oxide (rGO), are becoming an important class of nanomaterials in the area of optical and electrochemical sensors. The presence of oxygenated functional groups makes GO nanosheets amphiphilic, facilitating chemical functionalization. G-based nanomaterials can be easily combined with different types of inorganic nanoparticles, including metals and metal oxides, quantum dots, organic polymers, and biomolecules, to yield a wide range of nanocomposites with enhanced sensitivity for sensor applications. This review provides an overview of recent research on G-based nanocomposites for the detection of bioactive compounds, providing insights on the unique advantages offered by G and its derivatives. Their synthesis process, functionalization routes, and main properties are summarized, and the main challenges are also discussed. The antioxidants selected for this review are melatonin, gallic acid, tannic acid, resveratrol, oleuropein, hydroxytyrosol, tocopherol, ascorbic acid, and curcumin. They were chosen owed to their beneficial properties for human health, including antibiotic, antiviral, cardiovascular protector, anticancer, anti-inflammatory, cytoprotective, neuroprotective, antiageing, antidegenerative, and antiallergic capacity. The sensitivity and selectivity of G-based electrochemical and fluorescent sensors are also examined. Finally, the future outlook for the development of G-based sensors for this type of biocompounds is outlined.     

生物质热解制备高品质生物油研究进展

生物质热解制备生物油是能源富集的有效途径,是实现碳闭路循环的重要方式,作为一种环境友好型技术受到广泛关注和研究。然而,生物质热解反应过程复杂,生成的生物油热值低、含氧量高及强酸性等特点,制约了生物油的分离提纯、制备合成气以及燃烧等方面的应用,生物油品质的提升迫在眉睫。本文从生物质三组分、原料预处理、反应参数、催化剂、反应器等方面综述了影响生物油品质的主要因素,分析了生物油的特点,不同预处理下生物质特性的变化与生物油的关系,催化剂参与的热解行为对提升生物油品质的导向作用以及常用生物质热解反应器的特点,并对影响生物油品质的主要因素进行了总结。最后,针对影响制备高品质生物油的诸多因素提出建议,以期为制备高品质生物油提供参考和借鉴。     

The Role of Supplementation with Natural Compounds in Post-Stroke Patients

Malnutrition is a serious problem in post-stroke patients. Importantly, it intensifies with hospitalization, and is related to both somatic and psychological reasons, as well as is associated with the insufficient knowledge of people who accompany the patient. Malnutrition is a negative prognostic factor, leading to a reduction in the quality of life. Moreover, this condition significantly extends hospitalization time, increases the frequency of treatment in intensive care units, and negatively affects the effectiveness of rehabilitation. Obtaining growing data on the therapeutic effectiveness of new compounds of natural origin is possible through the use of pharmacodynamic and analytical methods to assess their therapeutic properties. The proper supply of nutrients, as well as compounds of natural origin, is an important element of post-stroke therapy, due to their strong antioxidant, anti-inflammatory, neuroprotective and neuroplasticity enhancing properties. Taking the above into account, in this review we present the current state of knowledge on the benefits of using selected substances of natural origin in patients after cerebral stroke.