外加盐对聚甲基丙烯酸己磺酸钠溶液粘度行为的影响

在恒定外加盐浓度下,提出了PSSHMA-水体系,外加盐浓度C_s、分子量M_w与特性粘数[η]_s之间的关联式:[η]_s=[η]_∞+Ae^-BC_sn A是当外加盐浓度趋于零时,聚电解质链伸展效应对[η]的贡献,B、n是常数。     

Recent Advances in Constructing Nitrogen‐Containing Heterocycles via Electrochemical Dehydrogenation

In consideration of the importance of nitrogen‐containing heterocycles in both medicinal and material chemistry, herein, we intend to summarize the most recent advances about their synthesis by electrochemical dehydrogenation.     

Enhanced degradation of 17β-estradiol by AgI/N-Bi2O3 composite: strong synergy of adsorption–photocatalysis

Research on Chemical Intermediates - 17β-estradiol (E2) is one of the environmental endocrine disruptors threatening human health. In this paper, AgI/N-Bi2O3 composites with the different mass...     

异氰尿酸三烯丙酯交联共聚物的合成及其色谱性能的研究(Ⅰ)

用异氰尿酸三烯丙酯作交联剂,以醋酸乙烯酯为单体,合成了交联共聚物,测定了它们的比表面积、平均孔径、孔容及溶胀性能,确定了合成的最佳条件;同时把共聚物作为气相色谱固定相,考察了其柱效、峰对称性及分离度等性能,该共聚物可快速分离烷烃、芳烃、醇等。     

SU(3)L×U(1)X模型和暗物质的新的候选者

提出了一个基于ＳＵ（３）Ｌ×Ｕ（１）Ｘ群的弱电相互作用模型．在该模型中,每一代轻子均包含两个中性粒子．计算了新的中性轻子（Ｎ粒子）的寿命,并估计了它的质量上限,从而说明Ｎ粒子可以看作暗物质的候选者．     

Measurement of Velocity Distribution in Atomic Beam by Diode Laser with Narrow Line width

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｉｎ 1 92 0 ,Ｏ .Ｓｔｅｒｎｍａｄｅａｆｉｒｓｔｐｒｅｌｉｍｉｎａｒｙｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｔｈｅｖｅｌｏｃｉｔｙｄｉｓｔｒｉｂｕｔｉｏｎｉｎａｔｏｍｉｃｂｅａｍｗｉｔｈａｍｅｃｈａｎｉｃａｐｐａｒａｔｕｓ[1] .Ａｆｔｅｒｔｈａｔ,Ｊ.Ａ .ＥｌｄｒｉｄｇｅａｎｄＬａｍｍｅｒｔｍａｄｅｂｅｔｔｅｒｄｅｔｅｒｍｉｎａｔｉｏｎｓｏｆｔｈｅｖｅｌｏｃｉｔｙｄｉｓｔｒｉｂｕｔｉｏｎｗｉｔｈａｒｏｔａｔｉｎｇｓｌｏｔｔｅｄｄｉｓｋ[1,2 ] .Ｔｈｅｓｅｅａｒｌｙｅｘｐｅｒｉｍ…     

INVESTIGATION ON PRODUCTION OF REFINED BRINE USED IN CHLORO-ALKALI MEMBRANE BY CHELATING RESIN D412

1. INTRODUCTION Alkali production by ionic membrane is a new technology. Refining used-brine by chelating resin was reported [1~8]. Zhang et al reported the study of using chalating resin D411 to refine used-brine from alkali production by ionic membrane. Restricted by equipment and technology, in cholro-alkali plant the brine alkalinity is very high (pH>11), so conventional method cannot make the concentration of iron ions in used-brine to meet standard. So far there is no report on th…     

蔗糖铁口服液抗贫血作用实验研究

用蔗糖铁络合物配伍太阳神鸡蛇提取液（生物健）、维生素Ｃ等制作蔗糖铁口服液；用低铁料造成大鼠贫血模型（Ｈｂ由１１０ｇ／Ｌ下降到６０±４ｇ／Ｌ）并将动物分为四组，Ａ组继续喂低铁料，Ｂ、Ｃ、Ｄ组在低铁料基础上分别加８×１０－６、１６×１０－６、３２×１０－６元素铁（来自蔗糖铁口服液）．２８天后断头取血测Ｈｂ、血清铁、肝脏铁．结果表明实验组血清铁、肝脏铁均比Ａ组高，血红蛋白Ａ组继续下降至３３．９±１２．０ｇ／Ｌ，而Ｂ、Ｃ、Ｄ组则分别为５５．４±１２．８、９２．０±８．０、１１０．０±６．０ｇ／Ｌ，本研究提示蔗糖铁口服液具有良好的抗贫血作用．     

示波-银量法及其应用

1引言虽然可定量进行的沉淀反应很多，但由于缺乏合适的指示剂，而应用于沉淀满定的反应并不多，目前比较有实际意义的是银量法，根据确定滴定终点采用指示剂的不同，又分为莫尔法、法损司法、佛尔哈德法。尽管这3种方法已得到广泛应用，但在实践中仍有不少不尽人意之处。莫尔法：在化学计时点时，［Ag-」＝［CI－」＝1．3xl0－5Imol/L，此时要觉察到有明显的AnCIO砖红色沉淀，需［K2CrO4」＝5．gx10-2mol/L，由于K2CrO4本身呈黄色，上述浓度大，颜色太深影响终点观察，实验结果表明采用〔KZCwh」25X10’moliL为宜，这样实际采用与…     

Velocity Distribution of Effective Atoms in a Small Optically Pumped Cesium Beam Frequency Standard

In this paper, the velocity distribution of effective atoms in a small optically pumped cesium beam frequency standard has been achieved from the Fourier transforms of the experimentally recorded Ramsey patterns. The result fits well with the theoretical calculation. The second order Doppler shift correction of the small cesium atomic clock is obtained from the velocity distribution of effective atoms.