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目的建立单细胞显微捕获联合低体积扩增技术,用于混合上皮细胞检材分离检验。方法取5名男性口腔上皮细胞拭子浸泡液30μL,分别滴加到5份含同一女性皮肤表皮细胞拭子上,制成5份混合上皮细胞样本为实验组,同时制备同样的5份样本为对照组。实验组样本采用显微捕获单个口腔上皮细胞,并使用低体积扩增技术进行扩增;对照组用M48纯化试剂盒提取DNA,Identifiler试剂盒复合扩增,扩增体系为10μL。所有产物均用ABI 3130遗传分析仪进行STR分型。结果 5份实验组样本均得到男性STR分型结果,5份对照组样本则均仅得到混合分型结果。将该方法应用于1例强奸杀人案例检验,取得了满意效果。结论单细胞显微捕获联合低体积扩增技术可用于混合上皮细胞样本的分离检验。 相似文献
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Spectrofluorimetric and Spectrophotometric Analysis of Two Analgesic Drugs in Pharmaceutical Formulations and Biological Fluids 总被引:1,自引:0,他引:1
Simple, reliable, sensitive, and accurate spectrofluorimetric and spectrophotometric methods were proposed for the determination of two selected analgesic drugs, namely tramadol and morphine, in pharmaceuticals and biological fluids. The proposed methods were based on the oxidation of the studied drugs by Cerium (Ce)IV in an acidic medium. The spectrofluorimetric method is based on measuring the relative fluorescence intensity of Ce(III) arising from Ce(IV) at 350 nm with an excitation wavelength at 250 nm. The spectrophotometric method involves on addition of a known excess of Ce(IV) to the studied drugs in an acid medium, followed by the determination of residual Ce(IV) by reacting with a fixed amount of methyl orange and measuring the absorbance at 510 nm. Different variables affecting the reaction conditions, such as the concentrations of Ce(IV), type and concentration of the acid medium, reaction time, temperature, and the diluting solvents, were carefully studied and optimized. 相似文献
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目的探讨不同保存温度下血样中毒鼠强的稳定性。方法配制毒鼠强质量浓度为0.5μg/mL的血液样品,分别置于45℃、25℃和4℃环境中保存,在配制当天及存放3、12、18和39d用气相色谱-质谱联用法测定其质量浓度,运用SPSS统计软件对结果进行统计分析。结果45℃、25℃下血样存放3d毒鼠强质量浓度基本不变,存放4~12d毒鼠强质量浓度有明显下降,存放12d后毒鼠强质量浓度缓慢下降;4℃下血样存放12d毒鼠强质量浓度基本不变,存放13~18d毒鼠强质量浓度有明显下降,存放18d后毒鼠强样品质量浓度缓慢下降。结论血样中毒鼠强质量浓度在最初的3d内稳定,此后浓度下降。保存温度对血样中毒鼠强质量浓度有影响。 相似文献
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Eszter Rockenbauer Claus Børsting Michael Stangegaard Rune Frank-Hansen Niels Morling 《Forensic Science International: Genetics Supplement Series》2009,2(1):83-84
FTA Cards (GE Healthcare) have been used for more than 4 years in Denmark for the collection of buccal cells as reference samples in crime cases. Semi-automated protocols for STR typing of DNA on punches of FTA Cards are routinely used. In average, full STR profiles were generated from approximately 95% of the FTA Cards with a standard punching protocol, while partial or no STR profile were obtained from 5% of the samples. Here, the Qiagen BioRobot® EZ1 Workstation (Qiagen) and the EZ1 DNA Investigator Kit (Qiagen) was used to extract DNA from 29 FTA Cards from which a complete STR profile was not generated with the standard punching protocol. All 29 samples were successfully typed with the AmpF?STR® Identifiler™ PCR Amplification Kit (Applied Biosystems) and with the SNPforID 49plex SNP assay. The lowest amount of DNA that resulted in complete STR and SNP profiles was 80 pg. The STR and SNP profiles were identical to those generated from another sample collected from each of the 29 individuals. 相似文献
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目的 观察开四关法治疗老年功能性便秘的临床疗效。方法 将70 例老年功能性便秘患者按随机数字表法分为治疗组和对照组,各35例。治疗组采用开四关法,对照组予常规针刺法。分别于治疗前后观察两组患者每周自主排便(spontaneous bowel movements,SBM)次数、便秘患者生活质量评价量表(patient assessment of constipation quality of life questionnaire,PAC-QOL)评分及简明生活质量量表(36-item short-form health survey,SF-36)评分,并检测一氧化氮(nitric oxide,NO)、一氧化氮合酶(nitric oxide synthase,NOS)、血管活性肠肽(vasoactive intestinal peptide,VIP)水平。结果 治疗组临床疗效优于对照组(P<0.05);在治疗2周、4周后,治疗组SBM次数均显著大于对照组(P<0.05)。两组患者治疗后PAC-QOL和SF-36总评分均有显著变化(P<0.05),且治疗组较对照组改善明显(P<0.05)。治疗组治疗后NO、NOS、VIP降低程度显著大于对照组(P<0.05)。结论 开四关法治疗老年功能性便秘疗效确切,其部分机制可能与降低血清NO有关。 相似文献
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Tiffany R. Layne M.S. Raquel A. Green B.S. Carolyn A. Lewis B.S. Francy Nogales B.S. Tracey C. Dawson Cruz Ph.D. Zendra E. Zehner Ph.D. Sarah J. Seashols‐Williams Ph.D. 《Journal of forensic sciences》2019,64(6):1831-1837
Evaluation of microRNA (miRNA) expression as a potential method for forensic body fluid identification has been the subject of investigation over the past several years. Because of their size and encapsulation within proteins and lipids, miRNAs are inherently less susceptible to degradation than other RNAs. In this work, blood, urine, semen, and saliva were exposed to environmental and chemical conditions mimicking sample compromise at the crime scene. For many treated samples, including 100% of blood samples, miRNAs remained detectable, comparable to the untreated control. Sample degradation varied by body fluid and treatment, with blood remarkably resistant, while semen and saliva are more susceptible to environmental insult. Body fluid identification using relative miRNA expression of blood and semen of the exposed samples was 100% and 94%, respectively. Given the overall robust results herein, the case is strengthened for the use of miRNAs as a molecular method for body fluid identification. 相似文献