CR与DR的临床应用比较与评价

目的比较计算机X线摄影(CR)与直接数字X线摄影(DR)两种成像方式的临床应用价值,以求对实际工作提供帮助。方法抽取胸部影像CR400例,DR400例。从应用范围、摄影方式、X线的剂量、成像时间、图像质量、图像的调节与处理等方面将两者进行比较。结果DR对于胸部影像的甲片率95%,CR对于胸部影像的甲片率93%。经统计学分析,P>0.05,无显著差异。结论DR与CR均提高了图像的质量,两者各有其优缺点。     

SPECT骨扫描与DR检查相结合的临床应用研究

目的印证ECT核素显像比DR检查发现病灶早3～6个月;探讨二者检查优势重点之区别,以便优势互补,提高诊断率。方法选择ECT骨扫描与DR检查均完善病例168例,分别阅读见各自发现病灶个数,再二者比对阅读见DR检查发现病灶个数,以验证二者结合提高诊断率的可行性。结果ECT骨扫描核素显像比DR检查发现病灶早、多。结论二者结合相互借鉴,可提高诊断水平,并提高DR检查诊断符合率12.24%。     

CR乳腺钼靶摄影的应用价值

目的探讨和评价CR系统在乳腺钼靶摄影中的应用价值。方法使用MD400乳腺钼靶机,8900干式激光打印机及IP板(8英寸×10英寸),KODAK8900扫描仪及其数据后处理系统,用同一台机器的传统屏-片120张与C R摄影片120张,两组照片比较。结果在CR摄影片中,甲乙级片占95.8%;传统摄影片中:甲乙级片只占40.8%。结论CR技术在乳腺钼靶摄影中的应用,显著提高了乳腺钼靶摄影照片的质量,从而提高乳腺钼靶摄影诊断水平。     

CR／CPE阻燃耐油电缆护套的研制与应用

主要介绍了阻燃耐油电缆护套的研制及开发。在阻燃耐油电缆护套料的开发中，以ＣＲ／ＣＰＥ并用为主体骨架材料，以十溴联苯醚（ＢＯＢＰ）、氢氧化铝（ＡＴＨ）、三氧化二锑（Ｓｂ２Ｏ３）为阻燃剂，填充水洗陶土、滑石粉、ＬＥＥ白滑粉，研制开发的成品电缆满足ＩＥＣ－５０２（１９９４），ＧＢ９３３１－１９９１，ＧＢ１２６６６－１９９１的性能要求，具有良好的经济效益和社会效益。     

发泡CR材料的制备与老化性能研究

以两步模压法制备发泡CR,研究发泡剂AC用量对发泡CR泡孔结构及炭黑N774、增塑剂DOP和助发泡剂聚乙二醇(PEG)用量对发泡CR物理性能的影响.结果表明:当发泡剂AC用量为6份时,发泡CR的泡孔结构较理想;当炭黑N774、增塑剂DOP和助发泡剂PEG用量分别为9,7和0.6份时,发泡CR的物理性能较好.随着老化时间的延长,发泡CR的物理性能先提高后下降,泡孔逐渐变软、坍塌或断裂.     

27例肺部炎性假瘤的诊断与外科治疗

目的探讨肺部炎性假瘤的发病机理、临床特点、诊断及外科治疗方法。方法对27例肺部炎性假瘤的临床资料进行回顾性临床分析,全组均进行手术治疗。结果全组均行手术治疗,无术后并发症和死亡,术前仅9例(33.3%)诊断正确。结论该病从临床症状和影像学上很难与肺癌鉴别。肺部炎性假瘤虽属良性,亦应尽早手术治疗。     

三维立体放射诊疗在肺部肿瘤诊断和治疗中的效果研究

目的探讨三维立体放射诊疗在肺部肿瘤诊断和治疗中的效果。方法对我院进行治疗的143例肺部肿瘤患者进行三维立体式放疗,观察其治疗效果和影响。结果治疗1个月后85例患者临床症状减轻,肿瘤有效率为59.4%,治疗3个月后有效率为76.2%;治疗前有101例伴有癌性疼痛,放疗结束后,有78例症状减轻好转,有效率为77.2%;有5例患者在治疗期由于并发感染和脑转移死亡,其余患者均完成放疗。随访1～12个月,有18例患者由于并发肺部感染、全身多处转移和功能衰竭等死亡。结论三维立体放疗技术有效提高靶区照射的准确性,降低了肿瘤周围组织残留细胞增长、扩散和远处转移的机率,减少了周围正常组织的耐受量,具有疗程短、副作用小、疗效显著等优点,值得在临床中使用。     

共混物IR/CR/苯乙烯类嵌段共聚物的结构与性能研究

选择苯乙烯－异戊二烯－苯乙烯嵌段共聚物（ＳＩＳ）、苯乙烯－丁二烯－苯乙烯嵌段共聚物（ＳＢＳ）和α－甲基苯乙烯－丁二烯－α－甲基苯乙烯嵌段共聚物（ＭＳＢＭＳ）３种苯乙烯类嵌段共聚物作为相容剂，通过理论预测和试验测试，研究了它们对ＩＲ／ＣＲ共混物网络结构和力学性能的影响。结果表明，加入ＳＩＳ，ＳＢＳ和ＭＳＢＭＳ可以明显提高硫化胶的弹性常数２Ｃ１和２Ｃ２以及拉伸强度，减小体系的损耗因子。３种共聚物的作用效果顺序为：ＳＩＳ＞ＳＢＳ≥ＭＳＢＭＳ。ＳＩＳ的最佳用量为３～７份。     

石油企业电气设备的检查与诊断

本文主要通过对目前现阶段我国电气设备运行状况的简要分析,提出了关于开展电气设备可靠性的诊断和对其进行维修的可行性和检修策略与方法。     

经支气管镜保护性毛刷对难治性肺部感染的病原学诊断及耐药性研究

目的探讨经电子支气管镜防污染保护性毛刷(PSB)在难治性肺部感染的病原学诊断及耐药性的价值。方法对186例具有严重基础疾病临床出现肺部浸润拟诊肺部感染的患者经电子支气管应用保护性毛刷在病变部位采样作病原学诊断。结果186例采样标本分离出细菌124株,其中革兰阴性杆菌94株,以铜绿假单胞菌占优势;革兰阳性菌22株,以金黄色葡萄球菌为主,真菌8株,其中耐药菌比例升高,耐甲氧西林金葡菌比率升高明显。结论引起难治性肺部感染的病原菌以耐药假单胞菌属和金黄葡萄球菌为主;经支单套管加气管镜防污染毛刷取样诊部感染病原菌具有准确可靠等优点,是检测肺部感染病原菌的有效方法。     

增容剂对CR/BR共混物相容性及性能的影响

本论文主要通过将4种增容剂CPE、NBR、BIIR、CIIR分别与CR/BR共混物制成混炼胶裁样、硫化、测性能的方式研究了增容剂对CR/BR共混物的相容性及其硫化胶性能的影响。结果表明：CR/BR共混物微观形态的SEM照片表明增容剂很好的改善了CR/BR共混物形态均匀性;其混炼胶焦烧时间延长,硫化速度加快,胶料流动性变好,但交联密度降低;硫化胶力学综合性能得到提升,拉伸强度、拉断伸长率和撕裂强度增加,定伸应力下降,硬度减小,弹性增加,耐热老化性提高。但尤以增容剂CIIR增容效果最好,有效的改善了共混橡胶的加工性能和使用性能。     

水、油环境下NBR/CR共混性能研究

本文对NBR/CR共混在水、油环境下的影响因素进行研究。其中主要涉及到NBR/CR的不同比例在氧化锌、氧化镁和硫磺作为硫化体系、N牌号碳黑以及白炭黑作为补强体系时对两种混合胶料的扯断强度、硬度、吸水性能、老化性能、耐水油腐蚀性能的影响。同时还研究了硫化时间对NBR/CR共混时的影响。     

The Lung Microbiome during Health and Disease

Healthy human lungs have traditionally been considered to be a sterile organ. However, culture-independent molecular techniques have reported that large numbers of microbes coexist in the lung and airways. The lungs harbor diverse microbial composition that are undetected by previous approaches. Many studies have found significant differences in microbial composition between during health and respiratory disease. The lung microbiome is likely to not only influence susceptibility or causes of diseases but be affected by disease activities or responses to treatment. Although lung microbiome research has some limitations from study design to reporting, it can add further dimensionality to host-microbe interactions. Moreover, there is a possibility that extending understanding to the lung microbiome with new multiple omics approaches would be useful for developing both diagnostic and prognostic biomarkers for respiratory diseases in clinical settings.     

多功能卷取装置研发

针对胎面附线生产制品多样化,要求卷取装置同时具备卷取胎面、单条胎侧或双条胎侧功能,在单条胎侧制品卷取时,卷取装置同时具备倒卷功能,贵州恒瑞辰针对市场需求特研发多功能卷取装置;本文介绍了贵州恒瑞辰研发的多功能卷取装置的结构组成及工作原理,列举了设备的主要性能指标;该设备技术先进,在满足技术条件以及多功能的要求下极大的提高生产效率。     

PTA集散控制系统UPS及其供电系统改造

通过对PTA一线装置集散控制系统UPS工作原理、供电系统结构的分析,总结了该系统存在的问题,提出了UPS及其供电系统的改造方案,并基于改造方案对该系统进行更新改造,实现了PTA一线装置集散控制系统的可靠供电。     

Saturated fat and heart disease: The latest evidence

In recent years, many nutrition news headlines exclaimed that saturated fat was not linked to heart disease, leaving the public confused about whether to limit intake, as has been the dietary recommendation for several decades. However, a more nuanced look at the evidence indicates that high saturated fat diets are in fact not benign with respect to heart disease risk. Dietary recommendations should emphasize replacing saturated fats typical in red and processed meats, and certain tropical oils and dairy forms, with healthier polyunsaturated and monounsaturated fat‐rich foods, such as nuts, olive oil, and fatty fish, as well as healthy sources of carbohydrates, such as fiber‐rich whole‐grain foods, rather than refined‐grain and sugar‐laden foods.     

呋喃与CHF3和CClF3构成的分子间卤键的理论研究

用MP2方法,在6-31G（d,p）Tfll6-311G（d,p）基组下对复合物呋喃-CHF,体系和呋喃-CCIF,体系进行优化,研究了其分子间作用力的本质。计算结果表明,CXF3与呋喃分子之间的相互作用使c—x键长缩短,振动频率增大（蓝移）。自然键轨道（NBO）分析表明,在MP2／6—31G＊＊（6—311＊＊）水平上,由于键收缩效应处于优势地位导致c—x键形成蓝移。     

束鹿凹陷沙三下段孔隙空间类型及其发育特征研究

通过岩芯观察、薄片鉴定、全井眼微电阻率扫描成像(FMI)测井分析等手段,对束鹿地区古近系沙三下段砾岩,泥灰岩〔1〕储层进行了研究分析。结果认为,研究区储集空间类型以裂缝和次生孔洞为主。对储层孔渗特征起作用的又以构造裂缝和孔隙——溶蚀孔洞为主。构造裂缝中以高角度斜交缝和垂直缝为主,部分充填或未充填,填充物以方解石为主,其发育经历了先期张裂、后期压扭和充填三个世代。     

The difficult road to new vaccines for pertussis and serogroup B meningococcal disease

Development of vaccines should be a well‐trodden path in which possible diversions and roadblocks should be clearly understood. However, challenges and unexpected twists and turns are not uncommon in modern vaccine development. In this perspective the considerable uncertainties for development of third generation pertussis vaccines will be discussed along with related issues in the development of new vaccines for the prevention of serogroup B meningococcal (MenB) disease. Acellular pertussis vaccines developed in the 1980s showed good efficacy in large clinical trials and whooping cough was at historically low levels in the last decade of the 20th century in most countries where the vaccines are used. However, the unexpected resurgence in cases in several countries has questioned the ability of current acellular pertussis vaccines to provide long‐term protection against the disease. For MenB vaccines the initial challenge has been to identify antigens that will induce protection against the diverse collection of isolates that cause disease. Following this there have been significant challenges to determine potential breadth of strain coverage. Furthermore, there has been a drop in the incidence of MenB disease in countries considering implementation of the new MenB vaccines making cost effectiveness a more difficult case to argue. It is likely that lessons learnt in the development and use of both pertussis and MenB vaccines will inform the future of vaccines for these two diseases. © 2015 Crown copyright. Journal of Chemical Technology & Biotechnology © 2015 Society of Chemical Industry     

表达呼吸道合胞病毒F蛋白的新城疫重组病毒的构建及其免疫原性

目的利用新城疫病毒(Newcastle disease virus,NDV)反向遗传系统构建表达呼吸道合胞病毒(respiratory syncytial virus,RSV)F蛋白的重组病毒,并以BALB/c小鼠为动物模型,评价其免疫原性。方法在已建立的NDV反向遗传系统的基础上,将RSV F基因插入NDV全长cDNA克隆中,构建并拯救获得表达RSV F蛋白的重组病毒r LS/RSV-F。采用间接免疫荧光(indirect immunoinfluscent assay,IFA)法鉴定RSV F蛋白的表达;以HA、病毒半数鸡胚感染量(50%infective dose,EID50)、半数组织感染量(50%tissue infectious dose,TCID50)及生长曲线等生物学指标对其生物学特性进行鉴定;将r LS/RSV-F滴鼻免疫BALB/c小鼠,于免疫后第49天经眼眶后静脉丛采血,分离血清,ELISA法检测IgG抗体效价,中和试验检测中和抗体效价。结果成功拯救表达RSV F蛋白的NDV重组病毒r LS/RSV-F,具有与亲本病毒相似的感染能力及生长动力学特性;r LS/RSV...