PNC型压电式高温涡街流量传感器

高温涡街流量传感器是根据卡门涡街理论，采用高温压电陶瓷制成的敏感器件，本传感器使用ＰＮＣ型改性偏铌酸铅高温压电陶瓷，这种陶瓷的主要参数为Ｔｃ５６２（℃），Ｋｔ０．１４，ｄ３３７６（ｐｃ／Ｎ），ε＾Ｔ３３／ε，２２０，文章给出了主要压电参数的温度特性和ＰＮＣ型高温涡街流量传感器的实测参数及主要技术性能。     

尾式苯丙氨酸卟啉铁（Ⅲ）与咪唑轴向配位反应热力学研究

研究了二氯甲烷甲咪唑与尾式苯丙氨酸卟啉铁（Ⅲ）的轴向配位反应，用江义江测定了该反应的标准平衡常数Ｋ，标准摩尔焓变Ｈ和标准摩尔熵变Ｓ，实验表明，该反应是熵和热均降低的过程。     

ERICE, a novel FLICE-activatable caspase

Programmed cell death, or apoptosis, is a process of fundamental importance to cellular homeostasis in metazoan organisms (Ellis, R. E., Yuan, J., and Horvitz, H. R. (1991) Annu. Rev. Cell Biol. 7, 663-698). The caspase family of mammalian proteases, related to the nematode death protein CED-3, plays a crucial role in apoptosis and inflammation. We report here the isolation and characterization of a new caspase, tentatively termed ERICE (Evolutionarily Related Interleukin-1beta Converting Enzyme). Based on phylogenetic analysis, ERICE (caspase-13) is a member of the ICE subfamily of caspases which includes caspase-1 (ICE), caspase-4 (ICErel-II, TX, ICH-2), and caspase-5 (ICErel-III, TY). Overexpression of ERICE induces apoptosis of 293 human embryonic kidney cells and MCF7 breast carcinoma cells. Like other members of the subfamily, ERICE is not activated by the serine protease granzyme B, a caspase-activating component of cytotoxic T cell granules. Therefore, ERICE most likely does not play a role in granzyme B-induced cell death. ERICE, however, was activated by caspase-8 (FLICE, MACH, Mch-5), the apical caspase activated upon engagement of death receptors belonging to the tumor necrosis factor family. This is consistent with a potential role for ERICE in this receptor-initiated death pathway.     

亚稳态惰性原子与SOCl_2传能反应产物SO(A)的发射光谱和强度分析

本文在流动余辉装置上,利用亚稳态惰性气体原子[He(2~3S)、Ne(~3P_(0,2))、Ar(~3P_(0,2))]与SOCl_2的专能反应,在(230-430nm)波段观察到了产物的发射谱,光谱归属为自由基SO(A~3∏_(2,1,0)→X~3∑~-)的跃迁。对光谱强度分析表明:SO(A→X)的偶极跃迁矩Re随核间距明显地变化。通过拟合,找出了这一变化的关系。另外,本文还计算了SO(A~3∏_0→X~3∑~-)跃迁的Franck-Condon因子。     

用于微细圆弧加工的激光刻录机

声盘、视及光的亚微米圆弧线一般通过激光刻录机光刻制造，本文结合我国开发的用于磁盘伺服图形录写的激光刻录机，从机械结构、光路系统及计算机控制系统等方面，对其进行了研究分析。     

用LiF-TLD测量脉冲电子加速器的轫致辐射场

本文给出用 LiF 热释光探测器(以下简称 LiF-TLD)对某脉冲电子加速器(厚靶)轫致辐射场的照射量和角分布的测量结果。该装置在高压450千伏、峰值电流110千安、工作脉冲宽度20—30纳秒时,窗口的照射率为10~(10)伦/秒。文中讨论了 LiF-TLD 的分散性,并给出了对该装置的辐射防护评价。     

对美国几家薄膜电路公司的考察及我厂技术改造的思路

赴美考察了混合系统公司、混合电路设计公司、ＭＩＣ技术有限公司、微功耗公司的薄膜电路生产技术。北京半导体器件一厂通过引进薄膜生产线，在设计和设备方面将接近国外先进水平。     

Characterization of unique lymphoid cells derived from murine spleen which constitutively produce interleukin-6

Attempts have been made to isolate continuous lines of rare subsets of lymphoid cells present in murine spleen in order to analyse their function and lineage relationship with respect to other lymphoid cells. Mitogenic stimulation was used to expand the lymphoid cells remaining in spleen following depletion of CD4+ and CD8+ T cells by antibody and complement treatment. Cells were cultured in the presence of concanavalin A (Con A), interleukin-2 (IL-2) and syngeneic irradiated spleen feeder cells. This procedure expanded a population of non-T-, non-B-lymphoid cells bearing a common, unique phenotype resembling lymphoid precursors. Eight cloned lines from B10.A(2R) and B10.A(5R) strains of mice have been analysed here. Analysis of cell surface marker expression has revealed positive expression of class I and class II major histocompatibility complex (MHC) antigens, CD44, CD45 (T200 and B220) but expressing no markers unique to T, B or myeloid cells. All cell lines represent agranular lymphoblasts and show no evidence of early T-cell receptor (TcR) or Ig heavy chain gene rearrangements, suggesting no commitment to T-or B-lymphoid lineage. Despite expression of the NK1.1 marker for natural killer (NK) cells, none of the cell lines has been shown to have cytotoxic function for NK targets, nor could cytotoxic function be induced following various activation procedures. Analysis of lymphokine production has revealed no detectable IL-1, IL-2, IL-3, IL-4, IL-5, tumour necrosis factor-alpha (TNF-alpha) or granulocyte-macrophage colony-stimulating factor (GM-CSF) in cell supernatants. However, all but one of these cell lines constitutively produce IL-6. Each cell line has been shown to induce T-cell proliferation independently in mixed lymphocyte reactions, implicating the capacity of these cells to act as antigen-presenting cells. Consistent with this hypothesis is the observation that these cells also demonstrate endocytic activity for foreign proteins. This was visualized by their uptake of fluoresceinated albumin into cytoplasmic granules. Since they express many cell surface markers common to described isolates of spleen dendritic cells, including both class I and class II major histocompatibility molecules, they would appear to represent the first example of continuous lines of this rare cell subset.     

城市生活垃圾中废弃木料流化床热解气化试验研究

为开发适合我国城市生活垃圾处理的低污染气化熔融技术，对城市生活垃圾中广泛存在的废弃木料组分进行了流化床热解与气化试验。流化床中，在反应温度400～700℃、过量空气系数0～0．8的范围内，对木料进行了系统的热解气化试验，分析了反应产物特性及其产量变化规律。结果表明，热解温度5000℃，热解油产量最大，可占原料质量的38％，热解气产量随温度增加而增大；气化温度600℃、过量空气系数0．4时，气化效率最高，达到73％，此时每标准立方米气化气热值为5800kJ，气化气产率为2．01m^3／kg；并进行相关的反应特性及机理分析。     

Treatment of coking wastewater by a UBF‐BAF combined process

BACKGROUND: Coking wastewater is a major pollutant, produced in large quantities in many countries worldwide. This study investigates the performance of a combined system for treating coking wastewater. The system is based on an upflow blanket filter (UBF) with a biological aerated filter (BAF). Efficiency is assessed according to organic pollutants and nitrogen removal. RESULTS: It was found that hydraulic retention time (HRT) had a greater influence on the removal efficiency of NH₃‐N than chemical oxygen demand (COD). The BAF facilitated simultaneous carbonaceous removal and nitrification, depending on the reactor height. The system removed 81.5% of COD and 96.4% of NH₃‐N when the total HRT was 46.7 h (15.4 h for UBF and 31.3 h for BAF). Gas chromatography/mass spectrometry analysis indicated that the main components of the coking wastewater were phenols and nitrogenous heterocyclic compounds. Certain refractory compounds decomposed in the anaerobic section, resulting in the production of intermediates. Although most organics present in the influent were absent from the final effluent, a few residual contaminants could not be fully eliminated by the system. CONCLUSION: The experimental results show that the present system is feasible for the treatment of coking wastewater. Copyright © 2007 Society of Chemical Industry