微波辐射合成肉桂酸

本文介绍了微波辐射合成肉桂酸的方法,该法与传统加热法相比具有简便快捷、产率和纯度高、对环境污染小的优点。     

Serum glycoconjugates and ceruloplasmin in cancer of uterine cervix

The present study was done to assess the levels of glycoconjugates and ceruloplasmin in sera of patients with cervical cancer. Serum hexoses, hexosamines, sialic acid and fucose are elevated in a variety of inflammatory and neoplastic conditions. All the glycoconjugates, except fucose were increased in serum of patients compared to controls. Also, hexoses and sialic acid levels were high in patients with later stages of cancer compared to patients with early stage disease (P=<0.0001, P=0.03). Serum ceruloplasmin was increased in patients with early stage cancer (51.5mg/dl) and with late stage cancer (61mg/dl) compared to controls (38mg/dl). The elevated glycoconjugates may be the result of inflammatory reaction associated with neoplasia, as serum ceruloplasmin (an acute phase reactant) is also increased in these patients.     

SINGLE-SWEEP OSCILLOPOLARO-GRAPHIC ANALYSIS OF P-NITROBENZOIC ACID

ＳＩＮＧＬＥ－ＳＷＥＥＰＯＳＣＩＬＬＯＰＯＬＡＲＯ－ＧＲＡＰＨＩＣＡＮＡＬＹＳＩＳＯＦＰ－ＮＩＴＲＯＢＥＮＺＯＩＣＡＣＩＤ￥ＹｕａｎＺｈｕｏ－ｂｉｎ；ＨａｎＦｅｎｇ－ｍｅｉ；ＣｈｅｎＹｏｎｇ；ＷｕＹａｎ－ｘｉａ（ＧｒａｄｕａｔｅＳｃｈｏｏｌ，Ｃｈｉｎ...     

关于氯甲基膦酸性质的研究

介绍氯甲基膦酸的合成方法、纯品的制备和主要用途以及氯甲基膦酸的物理化学性质.重点是对该化合物的酸性进行了研究,利用电位滴定法绘出了滴定曲线.研究表明,氯甲基膦酸为二元酸,可以进行二级电离.在测定温度(27℃)下,其浓度平衡常数Kα_1和Kα_2分别为1.29×10~(-2)、6.82×10~(-7);活度平衡常数K’α_1和K’α_2分别为1.26×10~(-2)和6.51×10~(-7).     

近年来京津地区酸雨形势变化的特点分析——气溶胶影响的探讨

本文利用2000年以来中国气象局的酸雨观测站网的观测资料，分析了近年来我国酸雨形势出现的一些新的变化，其中京津地区近年来酸雨程度与2000年前相比明显地逐年加重趋势最值得关注。本文着重分析了京津地区的酸雨程度的长期变化趋势，指出：为了迎接奥运会近年来北京等地加大了空气污染的治理力度，大气颗粒物总浓度的逐年下降，一次颗粒物如扬尘、工业粉尘对降水酸性的中和能力减弱，二次颗粒物如硫酸盐、硝酸盐等浓度和比例的升高，可能是近年来京津地区降水酸性明显增加的重要原因；这种情况提示我们，区域降水酸性对近年来采取的相关环境治理措施具有敏感的响应。     

Synthesis and Characterization of Poly（ N-Vinyl-2-Pyrrolidone／Itaconic Acid） Hydrogel

With N-vinyl-2-pyrrolidone (NVP) and itaconic acid ( IA ), poly ( N-vinyl-2-pyrrolidone/itaconic acid) [ P(NVP/IA) ] hydrogel was synthesized by free radical solution polymerization. The structure of this P(NVP/IA) was characterized by IR. Effects of concentration of itaconic acid, amount of cross-link agent,N, N‘-methylene-bis-acrylamide, reaction temperature, and time on properties of swelling ratio (SR) of the hydrogel were investigated. The results show that the best swelling property of the hydrogel is obtained at 50 ℃ and 1.5 h. pH sensitivity increases as the concentration of itaconic acid in the hydrogel system increases.Swelling ratio of the hydrogel decreases as the amount of cross-link agent increases.     

丙烯酸改性聚乙酸乙烯酯乳液的合成与性能

采用乳液聚合制备了新的丙烯酸改性的聚乙酸乙烯酯(PVAC)乳液。考察了丙烯酸改性的PVAC乳液的性能。研究结果表明：经改性后的共聚乳液，不仅提高了粘接强度和抗水性，而且可降低成本。     

磷钨酸催化环己酮氧化合成己二酸

以质量分数为30%的H2O2为氧化剂,在没有任何有机溶剂或助催化剂存在的情况下,考察了磷钨酸催化环己酮氧化合成己二酸的活性.结果表明,磷钨酸在环己酮氧化合成己二酸的过程中显示了较高的催化活性.研究了催化剂用量、过氧化氢用量、温度、时间等因素对磷钨酸催化活性的影响.反应的适宜条件为：n（环己酮）：n（H3PW12O40）：n（H2O2）=150：0.5：587,反应温度为92 ℃, 反应时间为8 h, 己二酸的收率可达60.6%.     

哺乳动物脂肪酸去饱和酶及其活性调节

总结了哺乳动物脂肪酸去饱和酶的结构和种类以及影响其活性的主要因素。脂肪酸去饱和酶系统由ＮＡＤＨ－细胞色素ｂ５还原酶、细胞色素ｂ５和去饱和酶组成，其中去饱和酶的活性受激素和营养以及生理等许多因素的影响。     

Adsorption of ruthenium ions on activated charcoal： influence of temperature on the kinetics of the adsorption process

INTRODUCTION Time dependence study of metal ions adsorptionon solids provides valuable information on the ad-sorption process and its mechanism. Rate of metalions adsorption process is dependent on a number offactors such as agitation of the solution, the state ofmetal ions in solution, concentration of metal ions andtemperature (Benes and Majer, 1980). Temperature isthe parameter generally ignored in most adsorptionstudies (Bangash and Hanif, 1992; Afzal et al., 1993;Atun and Kil…