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Nuclear Science and Techniques 2007年第1期18卷 42-49页

作者： ZHAO Long Jaroslaw M. WASIKIEWICZ Hiroshi MITOMO Naotsugu NAGASAWA Fumio YOSHII Department of Biological and Chemical Engineering Gunma University Tenjin-cho Kiryu Gunma 376-8515 Japan Advanced Materials Research Center R ＆D Laboratories Nissin Electric Co.Ltd Umezutakase-cho Ukyo-ku Kyoto 615-8686 Japan Takasaki Radiation Chemistry Research Establishment Japan Atomic Energy Research Institute Watanuki-machi Takasaki Gunma370-1292 Japan

Th/s article deals with the determination of the adsorption properties of metal ions and humic acid in wa- ter on crosslinked chitosan derivatives (carboxymethylchitosan) which were formed using the irradiation technique without any *** solubility test of these crosslinked materials were investigated in acidic,alkaline media, distilled water,and certain organic *** electron microscopic (SEM) images showed that the crosslinked chitosan derivatives possessed a porous morphological *** characteristic analyses demon- strated typically pH-dependent properties of the crosslinked *** adsorption studies were carried out by the batch method at room *** of heavy metal ions (such as Cu^(2+),Cd^(2+)) and humic acid onto crosslinked samples was found to be strongly *** kinetic studies indicated the rapid removal of metal ions,and humic acid from the aqueous ***,isothermal adsorption data revealed that Cu^(2+),Cd^(2+), and humic acid were removed by these crosslinked materials with high *** isothermal data were interpreted well by the Langmuir *** crosslinked carboxymethylated chitosan derivatives indicate favor- able adsorption of metal ions and humic acid.

关键词：金属离子腐殖酸壳聚糖衍生物辐射处理交联

Friedel-Crafts酰基化法制备聚苯乙烯型阴离子交换树脂

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功能高分子学报 1998年第4期11卷 513-520页

作者：许辉胡喜章中国科学院化学研究所

提出了一种合成聚苯乙烯型阴离子交换树脂的新方法：通过Ｆｒｉｅｄｅｌ－Ｃｒａｆｔｓ酰基化反应在交联聚苯乙烯上引入乙酰基，然后经溴化、胺化反应制备阴离子交换树脂。该方法避免了使用氯甲醚等致癌物质，并消除了二次交联等副反应... 详细信息

提出了一种合成聚苯乙烯型阴离子交换树脂的新方法：通过Ｆｒｉｅｄｅｌ－Ｃｒａｆｔｓ酰基化反应在交联聚苯乙烯上引入乙酰基，然后经溴化、胺化反应制备阴离子交换树脂。该方法避免了使用氯甲醚等致癌物质，并消除了二次交联等副反应。讨论了溶剂，催化剂，试剂和反应温度及时间等因素对各步反应的影响。测定了产物的基本性能并对所得结果进行了讨论。

关键词：阴离子交换树脂交联聚苯乙烯酰基化

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一种高吸水纤维及用其制成的高吸水纸

化学研究与应用 2000年第3期12卷 339-342页

作者：林昆华原思国蔡冬梅兰淑琴王毅赵林河南省科学院化学研究所河南郑州450003 郑州粮食学院化学化工系河南郑州450052

本文报道了一种高吸水纤维的合成、吸水性能及其部分物理机械性能 ,并利用这种高吸水纤维与纯棉纤维按 1 :4的比例进行混合打桨而制成一种高吸水纸 ,对这种吸水纸也进行了吸水性能及部分机械性能的测定 ,结果表明所合成的高吸水纤维对... 详细信息

本文报道了一种高吸水纤维的合成、吸水性能及其部分物理机械性能 ,并利用这种高吸水纤维与纯棉纤维按 1 :4的比例进行混合打桨而制成一种高吸水纸 ,对这种吸水纸也进行了吸水性能及部分机械性能的测定 ,结果表明所合成的高吸水纤维对蒸馏水 ,自来水及人工尿液的吸附速度快 ,吸收量高 ,并且可在一定的压力下保持较高的吸水量 ,还可以与棉纤维混合成纸。

关键词：高吸水纤维高吸水纸合成 PAN纤维交联棉纤维

Static and Dynamic Mechanical Properties of Acrylic Denture-Base Resins Cross-Linked with Polyvinylchloride

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材料科学与工程（中英文版） 2011年第4期5卷 421-430页

作者： Emmanuel Rotimi Sadiku Olusesan Frank Biotidara Department of Polymer Technology Tshwane University of Technology Lynnwoodridge 0040 South Africa

Static mechanical data (creep, at room temperature and at different loading levels) using a three-point bending test method and the viscoelastic characteristics (using the Dynamic Mechanical Thermal Analyser, DMTA) at a temperature range of between 40 °C and 155 °C and a frequency of 1 Hz), of acrylic denture-base resins that incorporate polyvinyl chloride (PVC) power were studied. Characteristic creep curves obeying an exponential growth as a function of time represented by: J(t) = A + Blog(t), where J(t) is the time-dependent deformation in time, t with A and B as constants, which depend on the materials properties, applied load and temperature, were obtained. There is a gradual decrease in storage modulus, E" with increasing temperature until a critical temperature is reached which depends on the resin type. For the commercial Perspex, a rapid decrease in modulus occurred above 110 °C, which is just above the normally accepted Tg for polymethyl methacrylate, PMMA. For the heat-cured dental resin, QC-20, the critical temperature is higher, at about 120 °C. For the cold-cured dental resin, Pour-n-cure, it softens at about 70 °C and the Maxum, the softening occurs at about 80 °C. The low softening temperatures for the cold-cured are attributed to the presence of residual monomer. However, it is important to recognize the fact that the moduli of the dental resins are somewhat higher than that of the commercial Perspex at ≈40 °C, which is just above the mouth temperature, 37 °C. This is attributed to the possibility of cross-linking, as demonstrated by the limited swelling in acetone. Static Young’s Modulus decreases, marginally for all samples tested, with increasing nominal loading times (1, 15.85 and 1,000 seconds).

关键词：聚甲基丙烯酸甲酯树脂类型聚氯乙烯动态力学静态性能交联义齿

Variation in Central Corneal Thickness during Open- or Closed-Eye Riboflavin Instillation for Corneal Collagen Cross-linking

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眼科学报：英文版 2013年第4期28卷 185-189页

作者： Na Li Xiujun Peng Zhengjun Fan Xu Pang Yu Xia Chinese PLA Medical School & PLA General Hospital Department of Ophthalmology Navy General Hospital of Chinese PLA

Purpose:To assess the effect of having an open or closed eye on the variation in central corneal thickness during riboflavin instillation for corneal collagen cross-linking (CXL).Methods:.Thirty eyes of 15 New Zealand White rabbits underwent an in vivo anterior segment optical coherence tomography (OCT) examination at 0,10,20,and 30 min after riboflavin instillation on the de-epithelialized corneal *** eye of every rabbit was randomly placed into one of two different treatment groups(open-eye or closed-eye)during the instillation;.the examinations were performed one after the *** instillation for 30 min,the changes in the corneal stroma and anterior chamber were observed by slit ***:.A significant decrease in the central corneal thickness(CCT).was demonstrated during riboflavin instillation;.the variations were smaller in the measurements performed with the eye closed than with the eye open.(81.36±15.13μm and129.20±12.05μm respectively)..Both methods turned the corneal stroma and anterior chamber ***:Keeping the eye closed during riboflavin instillation reduced the decrease in the CCT..The same yellow change in the corneal stroma and anterior chamber occurred,but the exposure time of the ocular surface was ***,.keeping the eye closed was a more effective and safer method than keeping the eye open.

关键词：核黄素膜厚度角膜滴注中央交联胶原新西兰白兔

Achieving excellent electro-optic activity and thermal stability in monolithic cross-linked nonlinear optical dendrimers

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Achieving excellent electro-optic activity and thermal stabi...

Subclinical inflammatory response after accelerated corneal cross-linking

中国化学会第十三届全国分析化学年会

作者： Fenggang Liu Shujie Chen Yuqing Chen Jiahai Wang School of Chemistry and Chemical Engineering Guangzhou University

我们研发两个新颖的含蒽或丙烯酸酯功能化基团的的非线性光学树枝状发色团,以有效提高有机电光材料的极化效率和热稳定性。这些以四烯为桥的新型树枝状大分子最初具有相对低的玻璃化转变温度,在加热极化后可以形成发色团网络从而提高电... 详细信息

我们研发两个新颖的含蒽或丙烯酸酯功能化基团的的非线性光学树枝状发色团,以有效提高有机电光材料的极化效率和热稳定性。这些以四烯为桥的新型树枝状大分子最初具有相对低的玻璃化转变温度,在加热极化后可以形成发色团网络从而提高电光材料的热稳定性和提供有效的位阻。在极化取向之后,由于发色团含量的有效增加,这些树枝状聚合物在1310nm下获得了210pm/V超大的电光系数。极化后的电光树枝状分子可以在200℃下保持电光系数稳定性30分钟,并且在150℃下具有长达超过300小时的稳定性。这些都为超大电光系数、超稳的电光调制器的制备提供了可能。

关键词：发色团交联树枝状分子电光系数

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Eye Science 2016年第2期31卷 107-110页

作者： Hassan Hashemi Nahid Ashraf Ebrahim Jafarzadehpur Alireza Hedayatfar Soheila Asgari Ocular Inflammation and Uveitis Clinic Noor Ophthalmology Research Center Noor Eye Hospital Tehran Iran Rassoul Akram Hospital Iran University of Medical Sciences Tehran Iran Department of Epidemiology and Biostatistics School of Public Health Tehran University of Medical Sciences Tehran Iran

Background:To evaluate the inflammatory response after accelerated collagen cross-linking(CXL)in eyes with ***:Consecutive eyes with keratoconus undergoing CXL surgery were included in this nonrandomized interventional *** flare was measured pre-and post-operatively with a laser flare photometer at 1 week,1,3 and 6 months after ***:Sixty eyes of 60 patients were entered into the *** CXL,the mean flare value was4.5 photons per millisecond(ph/ms).The flare values observed at week 1(7.1 ph/ms;P=0.008),month 1(6.5 ph/ms;P=0.04),month 3(6.7 ph/ms;P=0.004)and month 6(6.7 ph/ms;P=0.004)were significantly higher compared to *** values were not significantly different from week 1 up to 6 months after CXL(P=0.930).No statistically significant correlation was detected between the amount of inflammation and keratometric ***:Accelerated CXL in patients with keratoconus may cause a subclinical inflammatory response which is evident as slight but rather long-lasting rise of aqueous flare.

关键词：炎症反应角膜临床交联火焰光度计 pH值相关性检测毫秒