早期糖尿病视网膜病变中eEF2K活性变化的实验观察

目的观察早期糖尿病大鼠视网膜中真核生物延伸因子2激酶(e EF2K)的变化,探讨e EF2K活性变化在早期糖尿病视网膜病变(DR)中的意义。方法建立SD大鼠链脲佐菌素(STZ)糖尿病高血糖模型,造模成功后,设立糖尿病大鼠(DM)组和正常对照(NC)组。qRT-PCR检测DM组和NC组4周和8周时大鼠神经视网膜中e EF2K的表达情况。免疫荧光法观察定位神经视网膜中e EF2K激活标志物-磷酸化真核生物延伸因子2(p-eEF2)和Müller细胞活化标志物胶质纤维酸性蛋白(GFAP)表达情况。结果 4周和8周时DM组大鼠神经视网膜中e EF2K的表达水平与NC组相比无明显变化。8周时DM组大鼠神经视网膜各层均出现e EF2K激活表现,即p-eEF2表达增强。神经节细胞层出现细胞凋亡样改变,凋亡样神经节细胞中e EF2的磷酸化水平增强最为明显。神经视网膜中Müller细胞活化,GFAP蛋白表达增强。结论 STZ诱导糖尿病大鼠早期视网膜病变中神经视网膜内e EF2K激活,在凋亡样神经节细胞中e EF2K活性上升最为显著。福建省自然科学基金项目(2016J 01412);;国家自然科学基金青年项目(81700864

Application of Mycobacterium Tuberculosis Specific Protein InterferonGamma Release Assay in Tuberculosis Diagnosis and Therapeutic Monitoring

目的:目的:探讨结核分枝杆菌相关γ-干扰素释放试验(Tb-IgrA)在结核病诊断及临床抗结核治疗效果评价中的应用价值。方法:对196例临床确诊结核患者进行相关病史收集,同时进行Tb-IgrA、结核菌素皮肤试验、结核杆菌培养、涂片镜检、结核抗体检测,结核患者的治疗过程中按用药疗程(初治患者第2、5、6个月,复治患者第2、5、8个月)对其进行随访,在治疗结束后6个月和1年后各随访一次,比较Tb-IgrA与结核菌素皮肤试验在治疗过程中的变化。结果:确诊结核病例196例,其中肺结核158例,肺外结核38例,Tb-IgrA在结核诊断中灵敏度为82.1%,特异性为91.7%,阳性预测值为93.1%,阴性预测值为79.3%,与传统实验室检查方法相比有显著性差异(P<0.01)。在结核患者的抗结核治疗过程中,Tb-IgrA阳性率及浓度水平治疗前与治疗后2、6月以及复治后2、5、8月比较显著下降(P<0.01),Tb-IgrA水平与结核分枝杆菌数量存在较好相关性,与传统的TST方法评估疗效相比有显著性差异(P<0.01)。结论:Tb-IgrA在结核诊断中敏感性和阳性预测值较高,可作为较好的结核诊断的依据,同时Tb-IgrA对肺外结核的灵敏度较高,为肺外结核患者的诊断提供了较为可靠的依据,通过治疗过程Tb-IgrA检测分析,外周血Tb-IgrA的变化随着抗结核治疗的进程下降的趋势明显,与结核涂片镜检结果符合率较高,是临床疗效评估较为理想的指标。Objective To investigate the applicative value of mycobacterium tuberculosis specific protein interferon gamma release test in early diagnosis of tuberculosis and the evaluation of clinical efficacy.Methods 196 clinical diagnosis of tuberculosis patients were related to the history collection,and detected by TB-IGRA simueltaneously,tuberculin skin test( purified protein derivative of tuberculin 5 units),tubercle bacillus culture,directly smear,tuberculosis antibody detection.Treatment of tuberculosis patients were followed up( 2,5,6 months,retreatment patients at 2,5,8 months),in 6 months and 1 years after the end of treatment followup once.Compared with difference between the IGRA and tuberculin skin test and other traditional laboratory results.Results Confirmed tuberculosis cases in 196 cases,including 158 cases of pulmonary tuberculosis,38 cases of extra-pulmonary tuberculosis.The sensitivity of TB-IGRA in the pulmonary tuberculosis and extra-pulmonary tuberculosis showed 81% and 86.8% respectively,at the same time,TB-IGRA in the diagnosis of tuberculosis,the negative predictive value express 86.3%,specificity was 91.7%,and the positive predictive value was 88.2%.In anti-tuberculosis treatment the positive rate of TB-IGRA and concentration levels before treatment and after treatment 2,5,6months,retreatment 2,5,8months decreased significantly( P < 0.01).There is better correlation TB-IGRA concentration level with number of mycobacterium tuberculosis.It is significant difference compared to TB-IGRA with the traditional TST method to the evaluation of clinical treatment( P < 0.01).Conclusion The sensitivity of TB-IGRA in the diagnosis of tuberculosis and the postive predictive value is higher; it can be used as a good basis for the diagnosis of tuberculosis.TB-IGRA provides a more reliable diagnosis method in patients with extra-pulmonary tuberculosis.Peripheral blood TB-IGRA decreased significantly in anti- tuberculosis treatment process.Coincidence rate between TB-IGRA concentration level and number of mycobacterium tuberculosis is higher.It is an ideal index to evaluate the clinical efficacy.浙江省医药卫生科技计划项目(2009A167

Growth of Prussian blue microcubes under a hydrothermal condition: Possible nonclassical crystallization by a mesoscale self-assembly

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] classical crystallization process starts from stable nuclei followed by a simple enlargement of the nuclei by unit-cell replication. In recent years, the universality of such classical crystallization has been questioned upon investigations of biomineralization processes, and there are few examples showing that crystal growth may not follow such a classical crystallization process. In this paper, a typical coordination polymer, Prussian blue microcrystals, has been synthesized under hydrothermal conditions. By carefully analyzing the intermediates during the crystal growth process, we found that the growth of Prussian blue under the given growth conditions may follow a nonclassical crystal growth process in which a mesoscale self-assembly of nanocrystallites is included during crystal growth. Such a mesoscale self-assembly process could be a common phenomenon for growth of some crystals with extremely low solubility

一种水系电解液及水系金属离子电池

本发明提供了一种水系电解液，包括：水和无机盐；所述无机盐包括双三氟甲基磺酰亚胺锂。本发明采用了特定的无机盐双三氟甲基磺酰亚胺锂，可以有效提高所构成的水系金属离子电池的库伦效率。本发明通过在水和无机盐构成的水系电解质中增加醚类化合物，尤其是特定的醚类化合物三乙二醇二甲醚或四乙二醇二甲醚，可以提高水系金属离子电池的工作电压，获得较高的电导率，最终获得的水系电解液具有较高的库伦效率和容量保持率。实验结果表明，将本发明提供的水系电解液制成水系金属离子电池，1C下进行充放电，循环200次后，水系金属离子电池的容量保持率高于96％，库伦效率高于97％

80W-140型无人直升机主减速箱齿轮油台架性能试验研究

为了实现无人直升机齿轮油国产化，明确不同性能的齿轮油对齿轮箱性能的影响，从而科学地提高齿轮箱的可靠性和寿命，郑州机械研究所有限公司联合多家单位自主开发了80W-140型无人直升机齿轮油。在实验室对油品性能测试的基础上，通过齿轮箱综合性能试验台对80W-140型油品和进口油的性能表现进行了对比测试，并对台架试验测试得到的振动、噪声、温度、效率和胶合转矩等指标进行了分析。结果表明，不同性能油品对齿轮箱的效率和承载能力的影响明显不同，所研制的80W-140型油品具有较好的抗磨减摩和抗胶合性能，可有效提高齿轮箱的可靠性

微波法制备的超高容量锂离子电池正极材料及其方法

本发明公开了一种微波法制备的超高容量锂离子电池正极材料及其方法，将一定比例的锂的氢氧化物、氧化物或盐与过渡金属M的氢氧化物、氧化物或盐与掺杂金属M&rsquo;的氢氧化物、氧化物或盐以及添加剂通过机械或者化学方式混合均匀后置于空气气氛炉热处理得到所需的层状富锂锰基氧化物材料。采用微波法加热不仅缩短热处理时间，提高热利用效率，而且热处理均匀，解决了常规加热方式加热不均匀、时间长与温度高等问题，制备的超高容量锂离子电池正极材料层状富锂锰基氧化物，无杂相，且产品平均粒径均匀，循环性能优异，具有优异的电化学性能；本发明制备方法简单，生产成本低，节能高效，适合于工业化生产