以零价铜为催化剂的“活性”可控自由基聚合反应

研究了零价铜为催化剂,以ＣＣｌ４为引发剂,在２,２’－邻二吡啶（ｂｐｙ）或１,１０－邻二氮菲（ｐｈｅｎ）存在下的苯乙烯或甲基丙烯酸甲酯的“活性”／可控自由基聚合反应。研究结果表明：聚合过程中ｌｎ（［Ｍ］ｏ／［Ｍ］）与反应时间成线性增长关系,同时生成的聚合物的数均分子量与单体转化率也成线性增长关系,聚合过程呈现“活性”特征。     

高压下滴流床反应器动持液量的测定

在常压－２．０ＭＰａ的系统压力下测定了滴流床中气－液两相并流下流动的动持液量,了气－液流率,液相粘度,填料大小,压力以及床层高度对动持液量的影响。实验结果表明增中液体流率动持流量增加,气体流率增加时,结果相反粘度的增加对动持液量的影响不大,动持液量随填料空隙率的增大而变小。     

轻、中度缺氧对事件相关电位的影响及不同刺激模式的比较

目的 观察轻、中度缺氧对脑事件相关电位（ＥＲＰ）的影响,比较不同刺激模式发的ＥＲＰ对缺氧的敏感性,方法１２名受试者在地面、２５００ｍ和４３００ｍ匠心同度（吸放低氧混合气）分别进行视觉Ｏｃｄｄｂａｌｌ、Ｓｔｅｒｎｂｅｒｇ记忆量（ＭＳＥＴ）为１ 和ＭＳＥＴ为３的任务测试,记录ＥＲＰ的Ｐ３潜伏期、波幅和反应时（ＲＴ）及反应错误率（ＥＲ）。结果 ４３００ｍ高度缺氧时Ｐ３潜伏期显著延长,任务难度较大时ＥＲ增     

CART: from gene to function

CART was identified as a novel mRNA regulated by psychostimulant drugs. CART peptides appear to be neurotransmitters involved in a variety of functions such as feeding. The mouse gene has been characterized and localized to Chromosome 13. The processing of CART peptides is evident in Western blotting studies.     

Expression of intercellular adhesion molecule 1 (ICAM-1) is reduced in permanent focal cerebral ischemic mouse brain using an adenoviral vector to induce overexpression of interleukin-1 receptor antagonist

Our previous studies have demonstrated that overexpression of recombinant human interleukin-1 receptor antagonist protein (IL-1ra) via gene transfer can reduce ischemic brain injury. However, the mechanism of action of IL-1ra in ischemia is unclear. Since interleukin-1 can up-regulate intercellular adhesion molecules in endothelium, the present study was designed to determine whether overexpression of the IL-1ra can reduce the expression of intercellular adhesion molecule-1 (ICAM-1) after ischemic injury. Normal saline or adenovirus vector (1x109 particles) encoding the human IL-1ra gene (Ad.RSVIL-1ra) or the Escherichia coli LacZ gene (Ad.RSVlacZ) was injected into the right lateral cerebral ventricle of adult CD-1 mice. After five days, permanent middle cerebral artery occlusion (MCAO) was achieved for 24 h using an intraluminal suture. Cerebral blood flow was monitored by transcranial laser Doppler flowmetry to verify the occlusion. ICAM-1 protein was quantified using Western blot analysis and localized using immunohistochemistry. After MCAO, surface blood flow in the ischemic hemisphere was decreased to 9-11% of the baseline. There were fewer ICAM-1 positive vessels in the ischemic cortex of the Ad.RSVIL-1ra transfected mice than in the Ad.RSVlacZ transfected and saline treated mice (138+/-19 vs. 249+/-25, 284+/-22, p<0.05). Western blot analysis shows that ICAM-1 protein decreased 50-60% in the Ad. RSVIL-1ra group compared to the other two groups. There were no significant differences in the numbers of positive vessels in the ischemic basal ganglia and contralateral hemisphere among the three groups. Our studies suggest that IL-1ra overexpression can down-regulate the expression of ICAM-1 in the ipsilateral cortex in ischemic mice. Interleukin-1 may play an important role in the activation of inflammatory reaction during focal cerebral ischemia by promoting leukocyte adhesion on the endothelium cells.     

可乐定对脑缺血大鼠单胺类神经递质和内皮素的影响

目的：探讨可乐定能否缓解脑缺血大鼠单胺类神经递质和内皮素水平的紊乱。方法：大鼠ｉｐ苯巴比妥３０ｍｇ／ｋｇ麻醉,结扎双侧锁骨下动脉及颈总动脉致全脑缺血,采用荧光法及放免法测定单胺类神经递质和内皮素水平。结果：大鼠缺血３０ｍｉｎ再灌６０ｍｉｎ,与假手术组相比,缺血组脑中去甲肾上腺素（ＮＥ）,５－羟色胺（５－ＨＴ）水平明显减少４２％及２４％,但ＤＡ水平明显上升３３％,同时,脑与血浆中内皮素水平分别升高９     

敏感期内、末单眼斜视和剥夺猫视觉系统脑源性神经营养因子表达机理研究

目的观察和研究敏感期内、末不同时限单眼斜视
(monocularstrabismus,MS)和单眼剥夺(monoculardeprivation,
MD)幼猫视皮质、外侧膝状体的脑源性神经营养因子(brain
derivedneurotrophicfactor,BDNF)的可塑性变化。从形态学、分
子神经生物学角度探讨不同时限MS和MD幼猫视     

SALMONELLA BACTERAEMIA OCCURRING CONCURRENTLY WITH THE FIRST PRESENTATION OF SYSTEMIC LUPUS ERYTHEMATOSUS

There is increasing recognition of the association between Salmonellainfections and systemic lupus erythematosus (SLE). However,these infections have usually occurred in patients with establishedSLE who were receiving immunosuppressive therapy. We describetwo young women with previously undiagnosed SLE who developedSalmonella bacteraemia. Neither of these patients had receivedimmunosuppressive drugs. From these and two previously reportedpatients, it may be concluded that SLE per se is likely to beassociated with a defect in host defences to Salmonella bacteria. KEY WORDS: SLE, Non-typhoid Salmonella, Septicaemia     

Cochlear degeneration in guinea pigs after repeated hyperbaric exposures.

The effects of repeated hyperbaric exposures on inner ear function and morphology in guinea pigs were investigated with auditory electrophysiological testing, histopathological and electron microscopic techniques associated with enzyme histochemical method. The results showed that repeated hyperbaric exposures, though considered "safe," did cause damage to the cochlear system. Possible causes of the pathology include direct effects of repeated compression and decompression on the ear, and the possibility of inner ear decompression sickness and barotrauma cannot be excluded.     

疏肝起萎汤配合夫妻性感集中训练疗法治疗心因性勃起功能障碍147例疗效观察

目的:观察疏肝起萎汤配合夫妻性感集中训练疗法治疗心因性勃起功能障碍的临床疗效。方法:将406例患者随机分为3组,治疗组147例采用疏肝起萎汤(由柴胡、枳壳、白芍、淫羊藿、蜈蚣、川芎、陈皮、炙甘草组成)配合夫妻性感集中训练疗法治疗;对照Ⅰ组132例采用疏肝起萎汤治疗;对照Ⅱ组127例采用家庭性感集中训练疗法治疗。观察3组综合疗效和症状改善情况。结果:治疗组痊愈99例,好转37例,痊愈率67.35％,总有效率92.52％;对照Ⅰ组痊愈49例,好转34例,痊愈率37.12％,总有效率62.88％;对照Ⅱ组痊愈53例,好转36例,痊愈率41.70％,总有效率70.08％。治疗组与对照Ⅰ组、对照Ⅱ组痊愈率、总有效率比较,差异均有显著性意义(P<0.05)。结论:疏肝起萎汤配合夫妻性感集中训练疗法治疗心因性勃起功能障碍,疗效确切。