急诊猝死患者危险因素的识别及应对策略

目的:分析猝死发生的特点和疾病构成,早期识别高危人群,提高急救水平,降低猝死率,减少医疗纠纷.方法:回顾分析近5年来我院急救中心猝死患者的临床资料,对全部死亡数据进行统计分析.结果:猝死患者以老年人居多,心脏性猝死占首位,脑血管意外居第二位,男性死亡率明显高于女性.结论:心、脑血管患者猝死率最高,应及早发现和控制基础病...     

Isolation and biological analysis of tumor stem cells from pancreatic adenocarcinoma

AIM： To explore the method of isolation and biological analysis of tumor stem cells from pancreatic adenocarcinoma cell line PANC-1. METHODS： The PANC-1 cells were cultured in Dulbecco modified eagle medium F12 （1：1 volume） （DMEM-F12） supplemented with 20% fetal bovine serum （FBS）. Subpopulation cells with properties of tumor stem cells were isolated from pancreatic adenocarcinoma cell line PANC-1 according to the cell surface markers CD44 and CD24 by flow cytometry. The proliferative capability of these cells in vitro were estimated by 3-[4,5-dimehyl-2-thiazolyl]-2, 5-diphenyl- 2H-tetrazolium bromide （MTT） method. And the tumor growth of different subpopulation cells which were injected into the hypodermisof right and left armpit of nude mice was studied, and expression of CD44 and CD24 of the CD44^＋CD24^＋ cell-formed nodules and PANC-1 cells were detected by avidin-biotin-peroxidase complex （ABC） immunohistochemical staining. RESULTS： The 5.1%-17.5% of sorted PANC-1 cells expressed the cell surface marker CD44, 57.8% -70.1% expressed CD24, only 2.1%-3.5% of cells were CD44^＋ CD24^＋. Compared with CD44-CD24- cells, CD44^＋CD24^＋ cells had a lower growth rate in vitro. Implantation of 104 CD44 CD24 cells in nude mice showed no evidenttumor growth at wk 12. In contrast, large tumors were found in nude mice implanted with 103 CD44^＋CD24^＋ cells at wk 4 （2/8）, a 20-fold increase in tumorigenic potential （P 〈 0.05 or P 〈 0.01）. There was no obvious histological difference between the cells of the CD44^＋CD24^＋ cell-formed nodules and PANC-1 cells. CONCLUSION： CD44 and CD24 may be used as the cell surface markers for isolation of pancreatic cancer stem cells from pancreatic adenocarcinoma cell line PANC-1. Subpopulation cells CD44^＋CD24^＋ have properties of tumor stem cells. Because cancer stem cells are thought to be responsible for tumor initiation and its recurrence after an initial response to chemotherapy, it may be a very promising target for new dr     

基于电子鼻技术的多基原莪术鉴定?

目的：建立基于电子鼻技术的多基原莪术的鉴定方法。方法以检测器响应值为评价指标,优化样品的检测参数和筛选金属传感器,应用主成分分析和辨别因子分析对特征数据进行多元统计学分析。结果建立了多基原莪术的电子鼻检测法,得到其气味识别指纹图谱。结论基于电子鼻技术的多基原莪术鉴定方法可行,为中药材和中成药的鉴定提供了新思路。     

短柄龙胆的形态组织学研究

目的 对短柄龙胆进行形态组织学研究.方法 采用原植物鉴别、性状鉴别、显微鉴别的方法.结果与结论 确定了短柄龙胆在形态组织学方面的鉴别特征,为短柄龙胆的鉴别提供了依据.     

复方白及乳膏的质量控制

目的建立复方白及乳膏的质量控制方法。方法观察性状;以a-萘酚硫酸法鉴别白及多糖;以硫酸铜显色法鉴别尿素;以蒽酮染色法测定白及多糖含量;以苯甲醛染色法测定尿素含量。结果复方白及乳膏为白色的乳膏;α-萘酚硫酸鉴别显白及多糖的阳性反应;硫酸铜显色鉴别显尿素的阳性反应;白及多糖在1.88~33.75μg·mL-1范围内呈良好的线性关系,y=0.039X-0.0069(r=0.9998),平均回收率为98.3%,RSD为1.81%,平均含量应为4.0mg·g-1(±10%);尿素在10.0~120.0μg·mL-1范围内呈良好的线性关系,Y=0.0077X+0.0019(r=0.9995),平均回收率为99.1%,RSD为1.49%,平均含量应为0.1g·g-1(±10%)。结论所建立质量控制方法可操作性强,结果重现性好,适用于复方白及乳膏的质量控制。     

头孢曲松钠的XRD和1 H－NMR鉴定方法研究

目的：建立头孢曲松钠的XRD和1 H－NMR鉴定方法。方法将头孢曲松钠样品分别用X多晶粉末衍射仪和500MHz高分辨核磁共振谱仪进行测试并得到相应谱图,然后进一步分析和处理。结果 XRD谱图以晶面间距 d（7．96,7．06,5．74,4．82,4．70,4．44,4．19,3．91,3．73,3．16,2．64）为标准对照;1H－NMR谱图以分别位于δ3．5ppm,3．8ppm,6．7ppm和7．1ppm的四个特征单峰：A,B,C和 D,且峰积分面积比 A∶B∶C∶D＝3∶3∶1∶2为标准对照。结论上述方法简便易行,无需对谱图中所有的峰进行归属和解析。     

糖肾康丸薄层色谱鉴别

目的建立糖肾康丸的质量标准。方法采用TLC对糖肾康丸中的黄芪、山茱萸、五味子、黄柏进行定性鉴别。结果定性鉴别方法准确、专属性强。结论该方法简便可行、准确、专属性强,可有效控制糖肾康丸的质量。     

Feasibility and Preliminary Validation of an Online Version of the Ohio State University Traumatic Brain Injury Identification Method

Objective

To test the feasibility and validity of an online version of an established interview designed to determine a lifetime history of traumatic brain injury (TBI).

Evaluation of PyroMark Q24 pyrosequencing as a method for the identification of mycobacteria

We evaluated PyroMark Q24 (QIAGEN) pyrosequencing as a method for the identification of mycobacteria, with potential application in clinical practice. Sequence data from the hypervariable region A of the 16S rRNA gene (43 and 35 bp sequences) were obtained using PyroMark Q24, and a similarity search was performed automatically with PyroMark IdentiFire software. Of the 148 mycobacterial type strains tested, 138 (93.2%) were accurately identified to single or clade species level, including complex level. From the remaining 10 strains, 3 (Mycobacterium gilvum, Mycobacterium goodi, and Mycobacterium thermoresistible) showed poor sequencing quality of homopolymers. For 6 other strains (Mycobacterium cosmeticum, Mycobacterium flavescens, Mycobacterium pallens, Mycobacterium hodleri, Mycobacterium xenopi, and Mycobacterium crocinum), the sequences were unreadable from the middle, and Sanger sequencing indicated biallelic site. Finally, a 40 bp sequence for Mycobacterium gordonae could not be obtained despite repeated attempts. PyroMark Q24 provided accurate identification of multiple mycobacterial strains isolated from common clinical settings, but additional gene sequencing is required to distinguish species identified as a group or complex.     

搭桥法诱导肠炎沙门氏菌鞭毛抗原及鉴定

目的：了解搭桥法对诱导肠炎沙门氏菌鞭毛的临床意义。方法：从2013年4～6月两次食物中毒事件中分离获得7株具有典型生化反应、O-抗原为D群但缺失鞭毛抗原的沙门氏菌。采用搭桥法对7株菌株进行诱导培养,使其鞭毛抗原成功恢复。结果：综合该菌的生物学特性、生化反应及血清学试验得到准确的种属及血清型鉴定。结论：该菌鞭毛抗原的成功诱导为肠炎沙门氏菌的血清型鉴定提供了参考,为基层实验室开展沙门氏菌的血清学检验鉴定提供省时、简单、高效的方法,具有积极意义。