袋装血液保存液中易氧化物的GC-MS分析

一次性塑料血袋一般由增塑的聚氯乙烯(poly(vinyl chloride),PVC)软塑料制成.血袋在贮存过程中,袋体中的小分子有机物(易氧化物)会析出到血液保存液中,当用这些血袋贮存血液时,析出的易氧化物会降低血液中溶解氧的含量,不利于血细胞的有氧代谢和维持正常的pH值,影响血液制品的质量和输血安全,因此必须严格控制血袋中的易氧化物[1-5].     

3-巯基丙酸包裹的金纳米粒子自组装膜的制备及其层状周期性结构分析

制备了 3-巯基丙酸包裹的金钠米粒子水溶胶。在胺丙基三甲氧基硅烷覆盖的 Si或Si O2 基底上组装了上述金纳米粒子的单层膜和由 1 ,6-二巯基己烷联接的金纳米粒子多层膜。紫外 -可见吸收光谱和 X-射线衍射实验分析了多层膜的层状周期性结构     

Population of Unstable Nuclides and Nuclear Temperature Extraction in 46.7MeV/u 12C Induced Reaction

The experiment results of unstable nucliaes decay by using the light charged particle correlation function obtained in ¹²C 46.7MeV/u+⁵⁸Ni experiment are reported.Under the assumption of statistical equilibrium,the nuclear temperatures are extracted,and the influence of the reaction mechanism on the nuclear temperature are also investigated.     

Zeeman效应原子吸收分析中元素的吸收线分裂及其对灵敏度影响的研究Ⅰ.钪、钇、稀土除外的Ⅰ～Ⅷ族元素的吸收线

按照原子光谱理论,本文绘出了Ⅰ～Ⅷ族中38个元素约200余条吸收线的Zeeman分裂谱图.并对这些线在Zeeman原子吸收仪和普通原子吸收仪上进行了灵敏度的实验比较.从实验数据和谱图的研究中,可以有如下结论:(1)Ⅱ,Ⅳ,Ⅷ族元素的主要和大部分吸收线的灵敏度受Zeeman分裂影响较少.多数相对吸光度A_r=0.7～1.0.其中不仅有正常三线分裂的跃迁,也包括π成分分裂为2～10个精细组分,而π和σ±成分重叠极少的反常分裂跃迁.Ⅰ,Ⅲ,Ⅴ,Ⅵ,Ⅶ族元素的主要吸收线呈现π成分分裂为间距较大的2～6组分的反常分裂.其灵敏度有约50%左右的下降,A_r=0.3～0.6.然而对高灵敏度石墨炉分析而言,这种损失无足轻重.上述两类包括了所研究谱线中绝大多数谱线.因此可以说在横向恒磁场偏振分离调制方式的Zeeman原子吸收仪上绝大多数吸收线的灵敏度与普通原子吸收仪相近或同量级;(2)只有Ⅰ族次灵敏线和其它元素个别不常用的谱线呈现π和σ±成分有较大重叠的反常分裂,灵敏度有明显的损失,一般A_r<0.2.然而,仅有7条线的A_r值小于0.1;(3)Cu,In,Sn,Bi,Li及Au受精细或超精细结构作用,Zeeman分裂对灵敏度的影响可能变得复杂.建议分析应用时,以In3256.09Å代替In3039.36Å为主分析线.     

SCINTILLATION COUNTER ARRAY LOCALIZATION SYSTEM

A scintillation counter array localization system, i.e, scintillation counter hodoscope, was studied and made for selecting events and triggering the streamer chamber in 1980. With this facility the penetrating position of the charged particles can be determined and it can be used as a trigger counter too. As soon as the charged particles penetrated this array and other scintillation telescope, the generated coincidence signal triggers the control system of the streamer chamber with the time delay 74 ns.On the other hand, this system also has a ability of selecting charged particle number penetrating the counter array, thus, the streamer chamber is able to record the event with certain multiplicity.This hodoscope contains a 8×8 scintillation counter array. Each plastic scintillator (type ST401) has the dimensions of 40×5×0.6 cm³ and the type of photomultipliers used is GDB50. The array area is 40×40 cm².The fast electronics and data handling system were made by ourselves. The whole system works well during the test with the on-line microcomputer TRS-80 and is not expensive.     

不同离子掺杂的钛酸铋钠基陶瓷结构与性能表征

采用传统固相反应法制备了0.94(Na0.5 Bi0.) TiO3-0.06BaTiO3-3wt; Bi2 O3-xwt; Nd2O3(x=0,1.5)陶瓷.研究了Bi3+和Nd3+掺杂对0.94 (Na0.5 Bi05)TiO3-0.06BaTiO3陶瓷结构和电学性能的影响.结果表明,Bi2O3和Nd2O3掺杂不影响0.94(Na0.5 Bi0.5) TiO3-0.06BaTiO3的钙钛矿结构.3wt; Bi2O3添加使得铁电陶瓷0.94(Na0.5Bi05) TiO3-0.06BaTiO3转变为反铁电陶瓷.反铁电陶瓷0.94(Na0.5Bi0.5)TiO3-0.06BaTiO3-3wt; Bi2O3具有更高的相转变温度Tm(～320℃).Nd2O3添加不改变0.94(Na0.5 Bi0.5) TiO3-0.06BaTiO3-3wt; Bi2O3陶瓷的反铁电态,但增强了陶瓷的介电性能和弛豫性能.     

VHF-PECVD法制备氢化硅薄膜及单结电池

利用VHF-PECVD分解硅烷和氢气的混合气体来制备本征微晶硅薄膜.运用拉曼散射和X射线衍射研究了不同硅烷浓度对薄膜的影响.随着硅烷浓度的增加,沉积速率和光敏性增加而晶化率下降.将优化的本征材料应用到pin电池中,得到本征层厚度约为1μm的微晶电池,效率达5.87;.     

冷冻法硝酸磷肥工艺中酸不溶物提纯研究

采用酸浸、磁选酸浸、水淬/研磨酸浸等不同工艺对冷冻法硝酸磷肥生产工艺中的废渣-酸不溶物进行了提纯处理,利用X射线荧光光谱仪(XRF测试)对酸不溶物提纯前后各成分含量的变化进行了分析,从中得出了不同工艺流程对酸不溶物纯度的影响,最终确定了最佳的酸不溶物处理工艺.结果表明:在酸浸实验中,盐酸酸浸效果最佳,可将酸不溶物中SiO2纯度达到82.43;;在酸浸工艺前加入磁选、水淬、研磨的工序均可有效提升酸不溶物的提纯效果;冷冻法硝酸磷肥工艺中酸不溶物最佳的提纯工艺路线为:干燥、筛分、水洗、磁选、研磨、盐酸酸浸,处理后酸不溶物中SiO2纯度达到88.92;,符合微硅粉的生产要求.     

STUDY ON THE EFFECT OF POLYSTYRENE SULFONIC ACID MACROMOLECULES ON THE POLYMERIZATION OF ACRYLAMIDE

The effect of polystyrene sulfonic acid (PSSA) macromolecules on the polymerization of acrylamide (AM) has been studied. It was found that the rates of polymerization of AM were greatly increased in the presence of PSSA in the polymerization system.The maximum value of the rate of polymerization of AM was obtained when the ratio of [—SO_3H]: [AM] reached 3:1. When the insoluble crosslinked PSSA was used instead of the soluble one, this effect decreased considerably. The interaction between molecules of PSSA and AM was determined by infrared spectroscopy, elementary analysis and X-ray photoelectron spectroscopy. The combination form, —SO_3-NH_3~ CO—, formed between sulfonic group and amide group was found to be existed since the infrared absorption band of —NH_2 shifted from 3400cm~(-1) to 3150 cm~(-1), the binding energy of electron N_(18) changed from 399.7 eV to 401.3 eV, and the atomic ratio of N to S of the products was similar to the ratio of reagents. Based on these experimental results, the mechanism of AM polymerization in the presence of PSSA is proposed. The initial step is the combination of AM with sulfonic group to form —CONH_3~ , then followed by polymerization on the PSSA macromolecule. The role of PSSA on the polymerization of AM is discussed.