Hsp90在大肠癌患者血液中表达及意义

探讨Hsp90在大肠癌患者及正常人血清中的表达及意义。方法:通过对150例血浆样本,包括80例大肠癌患者、70例健康人采用酶联免疫吸附试验(enzyme linked immunosorbent assay,ELISA)进行检测,测定Hsp90蛋白的血浆浓度,检验其诊断大肠癌的敏感性和特异性。结果:ELISA检测结果显示,大肠癌患者血浆中Hsp90蛋白浓度为(86.54±18.20)ng/m L,显著低于正常对照人群(240.18±52.72)ng/m L(P0.01)。当cutoff值定为124.29 ng/m L时,Hsp90检测大肠癌的敏感性为96.5%,特异性为87.8%。结论:检测血浆中Hsp90的蛋白水平有助于大肠癌的诊断。     

有氧运动刺激下代谢适应对膳食功能改善作用

目的:研究有氧运动刺激下代谢适应对膳食功能改善性作用,预防和治疗消化系统疾病和肥胖相关疾病。方法:对测试人员进行5 km短跑和3 km有用长跑训练,分析真核细胞生成素的代谢,进行实时监测,采用统计分析方法,分析ABX3(A=阳离子;B=Ge,Sn,Pb;X=卤素离子)的结构,得到运动代谢细胞的分解过程,分析测试在有氧运动刺激下的膳食控制代谢活性酶含量,得到有氧运动刺激下的膳食控制代谢活性酶合成分子结构,进行资料分析。结果:并采用SPSS 13.0统计软件,利用Kinase-Glo Luminescent Kinase Assay Kit测定蛋白脂质体中磷脂和蛋白含量,随后用表面活性剂溶解蛋白脂质体,测试得出运动代谢适应度测试值分别为(48.11[±]12.11 ng/m L vs;126.33[±]32.152 ng/ml;167.58[±]72.13 ng/m L,[P0.05])。结论:在有氧运动刺激下进行运动代谢适应度控制,对膳食功能的改善,使得消化系统疾病的发病率得到有效降低,     

中药薰蒸治疗化脓性腮腺炎

目的:分析中药熏蒸治疗化脓性腮腺炎临床疗效。方法:选取从2014年6月-2015年6月收治的60例化脓性腮腺炎,随机分为对照组(30)与观察组(30),对照组采取西医治疗,观察组采取中药熏蒸治疗,对比两组临床疗效。结果:对照组hs-CRP、ESR、WBC分别为(8.24±3.45)mg/L、(13.46±5.37)mm/h、(7.23±1.87)109/L,观察组分别为(7.24±3.12)mg/L、(14.58±6.05)mm/h、(6.75±2.07)109/L,两组无明显差异(P0.05)。对照组总有效率为73.33%,观察组为93.33%,观察组明显高于对照组(P0.05)。结论:对化脓性腮腺炎患者采用中药熏蒸治疗,疗效显著,具有临床应用价值。     

高原地区高血压脑出血与高原性红细胞增多症的关系研究

目的探讨高原性红细胞增多症(high altitude polycythemia HAPC)是否会增加高原地区高血压脑出血的风险。方法分析西藏自治区第二人民医院神经外科2014-2016年间随机收治的72例高血压脑出血患者及随机选择了102例高血压病3级未出血患者资料,选取血红蛋白(HemoglobinHGB)、血小板(Platelet PLT)为分析对象,利用SPSS 22.0进行统计学分析,采用单因素ANOVA方差分析两组间统计学差异,以P 0.05为差异有统计学意义,采用logistic二元回归分析确定OR值,采用Pearson分析相关性。结果 (1)观察组与对照组相比HGB分别为(180.18±38.96)g/L和(149.06±33.82)g/L,标准误为4.59和3.35观察组明显高于对照组,且P=0.00,差异有统计学意义;(2)观察组与对照组相比PLT分别为(180.25±64.00)×1012/L和(215.47±79.43)×1012/L,标准误为7.54和7.86观察组明显低于对照组,且P=0.02,差异有统计学意义;(3)HGB与PLT相关系数r=-0.385,P=0.00,观察组r=-0.461,P=0.00,较对照组(r=-0.251,P=0.01)相关性明显;(4)两组间HGB OR值为1.122,表明HGB升高是脑出血发生的危险因素,两组间PLT OR值为0.907表明PLT升高是脑出血发生的保护因素。(5)同时此研究观察组HGB(180.18±38.96)g/L及对照组HGB(149.06±33.82)g/L分别与标准血红蛋白(HGB)正常值(130±20)g/L作了比较,标准误分别为4.5和3.3两组的HGB都明显高于正常值,且两组p=0.00,差异有统计学意义,说明两组都普遍存在红细胞增多情况。(6)此研究观察组PLT(180.25±64.00)×1012/L与对照组PLT(215.47±79.43)×1012/L也分别与标准PLT正常值(200±100)1012/L做了比较,标准误分别为7.5和7.8,观察组P=0.01,差异有统计学意义;而对照组P=0.05,差异无统计学意义,说明PLT增高是脑出血发生的保护因素。结论高原地区因缺氧、低压等高原环境因素导致血液中血红蛋白含量增加而引起高原性红细胞增多症,从研究中初步得出结论在高原地区高原性红细胞增多症可能是导致高血压脑出血的风险因素之一;而PLT是脑出血发生的保护因素;HGB与PLT呈负相关关系;HAPC观察组PLT较对照组低,较低水平的PLT导致凝血功能障碍增加出血的风险,同时高原性红细胞增多症可能影响凝血机制。     

粒-巨噬细胞集落刺激因子对化疗后大鼠结肠吻合口愈合的影响

目的:探讨粒-巨噬细胞集落刺激因子对化疗后大鼠结肠吻合口愈合的影响情况。方法:28只Wistar大鼠实施结肠吻合术,术后随机分草酸铂组(A组)和草酸铂+GM-CSF组(B组),每组14只,B组于吻合口两侧浆膜下层注射GM-CSF。术后24小时两组腹腔注射草酸铂25mg/kg。测定吻合口爆破压、羟脯氨酸含量及胶原纤维含量。结果术后第7天二组均出现吻合口漏,分别为3例和2例,差异无统计学意义;二组爆破压值及羟脯氨酸含量分别为:(169.26±4.31)mm Hg、(191.15±1.84)mm Hg;(9.86±0.40)μg/mg、(11.38±0.50)μg/mg;Ⅰ、Ⅲ型胶原纤维含量分别为:(1.08±0.11)p·μm2、(1.43±0.08)p·μm2;(1.06±0.10)p·μm2、(1.34±0.09)p·μm2。A组与B组比较差异有统计学意义(P0.05)。结论:局部注射GM-CSF可促进结肠吻合口愈合。     

重组人脑利钠肽治疗老年缺血性失代偿性心力衰竭

目的:探讨重组人脑利钠肽(rh BNP)治疗老年缺血性失代偿性心力衰竭的疗效及安全性。方法:选取心功能为NYHA IV级,经规范洋地黄强心、利尿剂利尿和硝酸甘油扩血管效果欠佳的老年缺血性失代偿性心力衰竭患者62例,随机分为2组:rh BNP治疗组(rh BNP组)31例,米力农治疗组(米力农组)31例。观察2组患者呼吸及心跳频率、NYHA心功能分级,左室射血分数(LVEF)、中心静脉压(CVP)、N末端B型钠尿肽(NT-pro BNP)水平并观察肝肾功能。结果:rh BNP组较米力农组患者的心率,肌酐及NT-pro BNP下降幅度明显增大,分别是(25.6±8.7)次/分,(18.5±7.3)次/分(p0.05);(68.2±11.8)μmol/L,(46.4±10.9)μmol/L(p0.01);(687.7±221.5)ng/L,(430.4±170.9)ng/L(p0.01)。rh BNP组较米力农组患者的LVEF的增加水平有明显差异,分别是(8.1±4.7)%,(5.5±3.3)%(p0.05)。而丙氨酸氨基转移酶、CVP、NYHA心功能分级及呼吸频率的改变则无明显差异,分别是(56.4±10.3)u/l,(47.8±2.6)u/l(p0.05);(5.4±3.3)cm H2o,(4.0±2.8)cm H2o(p0.05);(1.3±0.3),(1.0±0.4)(p0.05);(15.1±8.7)/分,(12.5±9.3)/分(p0.05)。结论:rh BNP治疗缺血性失代偿性心力衰竭疗效显著且安全性良好。     

枇杷果肉酶促褐变的研究——I.枇杷果肉中多酚氧化酶的分离、纯化和动力学特征

枇杷果肉制成丙酮粉,经硫酸铵分级沉淀、透析,DEAE-纤维素柱层析、ACA_(34)柱层析和FPLC分离等方法,分离和纯化得到多酚氧化酶的两个同工酶(酶A和酶B).酶B由一个或几个分子量为42×10~3D的亚基组成.酶的动力学研究表明:酶A、酶B的K_m(多巴胺为底物)均为2.40×10~(-3)mol/L,以邻苯二酚为底物时,酶A和酶B的K_m分别为0.163×10~(-3)mol/L和1.54×10~(-3)mol/L.酶底物特异性表明,酶B是邻位二酚酶,不能作用于单酚和间位二酚.     

巴戟天乙醇粗提物的体外抗菌活性初步研究

目的:对巴戟天乙醇粗提物的体外抗菌活性进行初步研究。方法:采用超声法提取,得到巴戟天浸膏,利用滤纸片法,二倍稀释法分别检测MIC和MBC,对大肠杆菌、金黄色葡萄球菌、枯草杆菌及白色念珠菌等常见细菌及真菌进行体外抗菌活性初步探讨。结果:巴戟天乙醇粗提物对枯草杆菌、金黄色葡萄球菌、大肠杆菌及白色念珠菌都有不同程度的抑菌及杀菌作用,最小抑菌浓度(MIC)分别为0.125g/m L,0.25g/m L,0.5g/m L,0.125g/m L;最小杀菌浓度(MBC)分别为0.5g/m L,1g/m L,1g/m L,0.25g/m L。结论:巴戟天乙醇粗提物对大肠杆菌、金黄色葡萄球菌、枯草杆菌及白色念珠菌均具有抑菌作用,并在一定浓度范围中具有杀菌作用。     

北京地区多氯联苯的湿沉降分析

本实验采集了北京市石景山区2006．5～2007．10的雨水样品,采用气相色谱（GC—ECD）检测雨水中84种多氯联苯（PCBs）。日的是为了计算雨水样品中PCBs的浓度和估计北京PCBs的湿沉降通量。雨水中∑PCBs的算术平均浓度为683±755ng／L,总质量／总体积得到的平均浓度为260ng／L。∑PCBs浓度有很大波动但是没有季节性的变化,总体呈减小趋势。对PCB异构体分析发现雨水中PCBs以2～6氯的低氯取代物为主。由2006年和2007年降雨量分别为172mm,348mm得到年湿沉降通量分别为78．01×103ng·m-2·yr-1,25．12×103ng·m-2·yr-1。     

天然牛磺酸联合肝宁方治疗肝炎后肝硬化腹水的临床观察

目的:探究天然牛磺酸联合肝宁方治疗肝炎后肝硬化腹水的临床疗效。方法选取200例肝炎后肝硬化腹水患者,随机分为观察组和对照组,各100例。观察组采用天然牛磺酸联合肝宁方的方法治疗,对照组则采用单纯西医治疗。观察比较2组患者的临床治疗效果。结果:经治疗后:(1)观察组患者治疗效果的总有效率高达94.0%,显著高于对照组的79.0%(P0.05);(2)治疗后观察组ALB(44.72±2.09)g/L、ALT(57.25±21.09)U/L、TBLL(41.72±7.09)μmol/L,均优于对照组(40.18±1.06)g/L、(82.58±42.35)U/L、(47.18±15.06)μmol/L(P0.05)。结论:天然牛磺酸联合肝宁方治疗肝炎后肝硬化腹水临床疗效显著,临床上值得广泛推广使用。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.