乙肝病毒标志物五种模式血清一氧化氮、一氧化氮合酶水平的比较

目的 :观察乙肝病毒 (HBV)感染者血清的一氧化氮 (NO)、一氧化氮合酶 (NOS)水平 ,探讨和研究NO在HBV感染过程中的变化和作用。方法 :应用ELISA法检测HBV血清标志物 ,并将HBV阳性血清分为五个常见模式组 ,应用Griess法测定各组血清NO和NOS水平与正常对照。结果 :HBsAg( +)、抗HBc( +)组 (第 4组 )和HBsAg( +)、HBeAg( +)、抗HBc( +)组 (第 5组 )显著降低 ;抗HBs( +)、抗HBc( +)组 (第 2组 )和HBsAg( +)、抗HBe( +)、抗HBc( +)组 (第 3组 ) ,NO和NOS回升 ;抗HBs( +)组 (第 1组 )和对照组水平相近。结论 :HBV在体内复制活跃时 ,可能抑制NOS活性 ,使NO合成减少 ,同时由于NO发挥对肝细胞的保护作用而使消耗增加。检测血清NO、NOS可观察HBV感染程度和预后。NO用于HBV感染的治疗有待研究     

低分子肝素治疗急性脑梗死的临床观察

目的 观察低分子肝素治疗急性脑梗死的临床疗效及对出凝血时间、凝血酶原时间、血小板的影响。方法 ６０例急性脑梗死患者,分为治疗组、对照组各３０例。治疗组采用低分子肝素静滴,对照组用低分子右旋糖酐治疗。结果 治疗组总有效率９３．３％,显效率６３．３％,明显优于对照组（７３．３％,４６．６％）。有显著性差异（Ｐ〈０．０１）;对出凝血时间、凝血酶原时间、血小板无显著性差异（Ｐ〉０．０５）,无１例继发出血。结论 低分子肝素治疗急性脑梗死是安全有效的。     

Effects of Mifepristone Compound on the Receptors of Estrogen and Progesterone in Early Pregnancy Deciduas

Mifeprlstone,a norethindrone, is the first synthetic effective steroid which canbind to the progesterone receptor with greater affinity than progesterone, but lacksthe agonistic effect. Its anti--progestin action results in the withdrawal of progesterone at cellular level to interrupt its biological action and can terminate early pregnancy['j. At present, the dose of mifepristone in combination with the analogue ofprostaglandin in terminating early pregnancy is 150 mg-- 200 mg and the complete…     

Transcriptome analysis of Armillaria gallica 012 m in response to auxin

Gastrodia elata is an achlorophyllous and fully mycoheterotrophic orchid which obtains carbon and other nutrients from Armillaria species in its life cycle. Many researchers suggested that plant hormones, as signing molecules, play a central role in the plant–fungi interaction. In the process of Armillaria gallica 012 m cultivation, both exogenous indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) distinctly stimulated the growth of mycelia in solid media. The differential expression genes (DEGs) of A. gallica 012 m with IAA versus blank control (BK) and IBA versus BK were investigated. The results showed that more than 80% of DEGs of the IAA group were coincident with the DEGs of the IBA group, and more than half of upregulated DEGs and most of the downregulated DEGs of the IAA group coincided with those DEGs of the IBA group. Above research implied that A. gallica 012 m could perceive IAA and IBA, and possess similar responses and signaling pathways to IAA and IBA. The overlapping differential genes of the IAA group and IBA group were analyzed by GO term, and the results showed that several DEGs identified were related to biological processes including positive regulation of the biological process and biological process. The downregulated NmrA-like and FKBP_C genes might be benefit to the growth of mycelia. Those results can explain that exiguous IAA and IBA improved the growth of A. gallica to some extent. We speculate that IAA and IBA are signaling molecules, and regulate the expression of growth-related genes of A. gallica 012 m by the same signaling pathway.     

甲状腺乳头状癌核内包涵体及核的形态结构定量分析

目的:定量揭示甲状腺乳头状癌核内包涵体及核的几何形态结构特点,为甲状腺乳头状癌的病理诊断提供定量诊断参数。方法:取甲状腺乳头状癌100例,常规切片、HE染色,在40倍物镜下采集核内包涵体及核的图像,用Image-Pro Plus测试包涵体及核的面积、周长、长轴、短轴、形状因子PE（Form PE）、形状因子AR（Form AR）、规化形状因子（RFF）、轴比、核内包涵体的面积密度以及包涵体与核质的面积比。结果:（1）甲状腺乳头状癌核内包涵体的面积约为（13.575±9.045） μm2（95%CI 13.339~13.810）,其在核内的面积密度约为25.761%±10.683%（95%CI 25.483~26.039）;其周长约为（12.720±4.275） μm（95%CI 12.609~12.831）,长轴（4.547±1.466） μm（95%CI 4.509~4.585）,短轴（3.482±1.178） μm （95%CI 3.451~3.512）;其轴比约为0.772±0.121（95%CI 0.769~0.775）,Form PE、Form AR和RFF约等于1;其与核质的面积比约为0.380±0.237（95%CI 0.374~0.386）,其面积、周长、长轴和短轴的变异系数为66.6%、33.6%、32.2%、33.8%。（2）具有核内包涵体的癌细胞,其核的面积、周长、长轴和短轴及其相应变异系数显著大于没有核内包涵体的细胞核（P<0.05）。（3）核内包涵体、含有核内包涵体的核及没有核内包涵体的核,其面积、周长、长轴和短轴的频数分布均呈正偏态分布。结论:（1）甲状腺乳头状癌核内包涵体形状大致呈圆形;约为核面积的1/4,核周长、长轴和短轴的1/2;其面积、周长、长轴和短轴的变异程度均较大。（2）具有包涵体的癌细胞,其核的异型性明显,诊断阅片时应重点观察。（3）包涵体及核的上述尺寸参数的频数分布均呈正偏态分布。     

基于体表生理信号的呼吸功能监测仪研制

目的：研制一款基于体表心电、膈肌电和胸阻抗信号的呼吸功能监测仪原理样机,可在家庭、医疗急救等场合实现对呼吸功能的持续监测。方法：以STM32F411VET6单片机开发系统为平台,用一对Ag/AgCl电极作为高频激励信号的输出和心电、胸阻抗信号的检测电极,另一对Ag/AgCl电极作为膈肌电信号检测电极,两对电极同时检测心电、膈肌电和胸阻抗信号。系统硬件主要包括心电信号检测电路、胸阻抗信号检测电路、膈肌电信号检测电路、恒流源激励电路以及微控制器。系统采用12 V可充电锂电池供电,模拟信号通过单片机A/D转换成数字信号,通过SDIO接口存储于SD卡。在完成样机制作和性能测试之后,采集13例因呼吸功能障碍实施机械通气患者和13例健康成年人的信号,计算15个与呼吸功能相关的参数,比较机械通气患者与健康对照组参数之间的差异,验证了呼吸功能监测仪的可靠性。结果：样机采集信号的信噪比>10 dB、共模抑制比>80 dB,样机漏电流<30μA。机械通气患者的吸气时间、呼气时间、潮气量、胸阻抗峰峰值、胸阻抗1 s变化量、膈肌电低频功率、膈肌电高频功率、高频比低频、膈肌放电面积、膈肌放电时...     

人工心脏圆盘泵的流动特性研究

人工心脏（血泵）一直存在泵体对血细胞剪切力过大和流速过快容易引起溶血的问题。为了研究人体正常血压情况下,血泵内部剪切力和速度场的分布情况,选择圆盘泵叶轮代替传统离心泵叶轮,对两种模型进行数值计算,分析不同叶轮内部剪切力和速度场的分布规律。研究表明传统离心泵内部流速高,叶片表面剪切力大,对血细胞的伤害大。圆盘泵相比传统离心泵,剪切力更小,流场速度分布均匀,流速更小。和传统离心泵相比,不同转速下圆盘泵能降低溶血的发生率。圆盘泵叶片数为6片时,抗溶血性能更好。研究结果为血泵的优化提供理论依据。     

Simultaneous Construct Surface Microstructural and Internal Network-Like Conductive Pathways of Poly(l-lactic acid)/Carbon Nanomaterials Composite Foams

The poly(l -lactic acid) (PLLA)/carbon nanomaterials composite foams with hierarchical surface microstructural and internal conductive pathways are successfully prepared by a simple crystallization-assisted rapid phase separation (CARPS). The dimension and morphology of carbon nanomaterials can induce different crystallization forms to construct the hierarchical surface microstructure, and they are distributed on the phase interface of solvent and non-solvent to form conductive pathways. It is found that the heterogeneous nucleation of nanomaterials promotes a significant increase in crystallinity, and a stacked granular structure formed on the surface promotes the increase of the water contact angle to 148.7°. Foams with interconnecting pore structures contribute to the formation of 85.3% porosity and 12.33 g g⁻¹ oil absorption. Carbon nanomaterials are distributed on the pore walls of the porous foam, which converts the foam from an insulating material to a conducting polymer. Furthermore, the uniform distribution of nanomaterials significantly affects the thermal stability of the PLLA. In belief, the multifunctional biodegradable foam, prepared by a CARPS method, makes it promising for industrial production and has potential applications in electrical conductivity, oil-water separation, and many other fields.     

Scanning laser ophthalmoscope imaging of fluorescein-labelled blood cells

Purpose: To demonstrate the feasibility of a technique for the visualization by scanning laser ophthalmoscope (SLO) of fluores cein-labelled autologous leukocytes and platelets in retinal vessels. Method: Individual blood samples from rats and rabbits were centrifuged to isolate platelets and leukocytes, then passively labelled with fluorescein and reinjected into the same animal. An SLO was used to visualize and record cell displacement in the retinal circulation. Labelled platelets were analysed by flow cytometry. Results: By SLO, platelets appeared as a heterogeneous particle flow, and individual leukocytes appearing as brighter spots could easily be traced. Flow cytometry showed that after labelling platelets were well individualized and their size was slightly increased. Conclusion: Circulating blood cells can be visualized in retinal vessels by a simple method consisting of passive labelling of autologous platelets and leukocytes by fluorescein. No platelet toxicity was detected. This method could be applied to the study of blood cell movement in human retinal vascular diseases.Proprietary interest category: N     

丙烯腈对大鼠外周血淋巴细胞DNA损伤的研究

［目的］ 探讨丙烯腈对大鼠外周血淋巴细胞ＤＮＡ的损伤作用。［方法］ 在急性和亚急性经口染毒试验中,采用单细胞凝胶电泳技术检测不同染毒剂量（１０ｍ ｇ／ｋｇ、３０ｍ ｇ／ｋｇ 和５０ｍ ｇ／ｋｇ）丙烯腈（ＡＣＮ）及不同染毒时段（２ｈ、１４ｄ、２８ｄ、和４２ｄ）对大鼠淋巴细胞ＤＮＡ 的损伤情况。［结果］ 在急性和亚急性染毒试验中,大鼠淋巴细胞ＤＮＡ损伤程度均随ＡＣＮ 染毒剂量增大或染毒时间延长而逐渐加重,并显著高于对照组或染毒１４ｄ 组（Ｐ＜０．０１）,且存在较好的剂量－反应和时间－反应关系（Ｐ＜ ０．０１）。亚急性染毒试验中,随着染毒剂量的升高和染毒时间的延长,淋巴细胞ＤＮＡ 的损伤程度可达到饱和。染毒组细胞ＤＮＡ 损伤反应模式明显不同于对照组,单个细胞间的差异较大,且这种差异随染毒剂量增大和染毒时间延长也逐渐增大。［结论］ ＡＣＮ对大鼠外周血淋巴细胞ＤＮＡ具有明显的损伤作用,且损伤程度和模式受ＡＣＮ 染毒剂量和染毒时间的共同影响。