Isolation of lambda-cyhalothrin from biological material

Dioxan is proposed as an isolating agent for isolating lambda-cytalotrin (LC) from biological material. Optimal conditions for isolating LC from cadaveric hepatic tissue with dioxan were determined and the results of the isolation were quantified.     

Characteristics of dipyridamol isolation from biological material

Acetone is proposed as an isolating agent for extraction of dipyridamolum from biological material. Optimal conditions of isolating dipyridamolum from human cadaveric liver tissue with acetone are determined and quantitative estimation of isolation results is provided.     

Detection of dipiridamol in biological fluids

Acetone is proposed as an isolating agent for dipiridamol isolation from biological fluids. Purification of the isolates was performed with liquid-liquid extraction and colon chromatography with silasorb C-18 sorbent. The technique of dipiridamol detection in the blood and urine is described. The assays results are presented.     

The detection of the presence of azafen in cadaveric material

Possibility of isolating azaphen from the cadaveric material by acidified water and acetonitrile (as extractant) is shown. Isolation rate (75.6%) of azaphen (with 1 mg of preparation added to 25 g of the liver by acetonitrile is significantly higher than in isolation by acidified water (41.7%).     

差异提取试剂盒在混合斑DNA提取中的应用

目的评估差异提取试剂盒对混合斑样本中的精子和上皮细胞DNA分离提取的有效性。方法采用差异提取试剂盒,选择性裂解精细胞和上皮细胞,结合磁珠法分别对人为控制条件下制备的模拟混合样本和案件中的混合斑检材进行精细胞DNA和上皮细胞DNA的分离提取。对所提取的DNA进行定量分析和STR分型。结果该试剂盒能从精子和上皮细胞不同比例的混合斑中提取出高纯度的精细胞和上皮细胞DNA。结论该差异提取试剂盒适用于性侵害案件中混合斑检材的DNA提取。     

Paternity-testing on paraffin-embedded abortion tissue: preparation of fetal cells may be indispensable

In a case of sexual abuse, a paternity test was performed on paraffin embedded abortion material. STR typing was successful only after isolating fetal tissue from the abortion-material and separately extracting DNA from the excised fetal cells. Examination with five STRs led to a paternity index of 332, confirming the abuse that had resulted in pregnancy.     

利用唾液斑DNA上12S rRNA基因片段进行动物种属鉴定

目的通过检测唾液斑DNA确定案件所涉及动物的种属。方法通过提取动物唾液斑DNA,扩增其线粒体DNA上的12S rRNA基因片段,并进行DNA测序,测序结果在GenBank上进行BLAST搜索,再利用DNA MAN软件进行同源性分析。结果从唾液斑中成功地提取到了基因组总DNA,并成功扩增出了用于动物种属鉴定的12SrRNA基因片段。结论所报道的方法能用于动物种属鉴定。     

Isolation of nitrobenzene from biological material

Toluene is recommended as an agent for extraction of nitrobenzene from biological material. Optimal conditions for nitrobenzene isolation from cadaveric human liver are defined and the results of isolation are quantitatively evaluated.     

Co-occurrence and Correlates of Posttraumatic Stress Disorder and Major Depression in Physically Abused Women

Ninety two women presenting for treatment for marital problems and who were physically victimized by their spouses (e.g., pushing, shoving, punching) within the past year participated in this study. There were three study objectives: (1) document rates and co-occurrence of posttraumatic stress disorder (PTSD) and Major Depressive Disorder (MDD), (2) identify predictors of PTSD and depression symptom frequency/severity, and (3) systematically evaluate disorder-specific group differences in marital- and marital violence-related factors. Within the month prior to assessment, 29.8% of the sample met diagnostic criteria for PTSD and 32% for MDD. MDD and PTSD were significantly, but moderately, correlated at both the symptom and diagnosis levels. However, PTSD symptom frequency and depression symptom severity were predicted by different marital- and marital violence-related factors. PTSD symptoms were predicted by spouse's dominance/isolation tactics and intensity of husband-to-wife physical aggression while depressive symptoms were predicted by marital discord and intensity of husband-to-wife physical aggression. Comorbid women and those with PTSD only reported significantly more spousal fear and husband-to-wife physical aggression than those with MDD only or neither disorder. No group differences were found on rate of marital discord or spouse's controlling/isolating tactics. Results are discussed in terms of theoretical and treatment implications for abused women seeking treatment for marital conflict.     

Child physical abuse and self-perceived social isolation among adolescents

This research examines the connection between physical abuse and social isolation. Using data from the National Youth Survey, a measure of self-perceived social isolation was constructed indicating the extent to which respondents feel detached from their friends and from school. Those who had experienced violence were predicted to be more isolated than those who had not. Results strongly supported the hypothesis, controlling for theoretically relevant variables. Explanation is provided in terms of damage to attachment skills, social competence, and self-esteem concomitant to being a victim of abuse. Males were more socially isolated than females, and Hispanics more than Whites. Children with involved parents were less socially isolated; those whose parents experienced normlessness were more isolated. Children who recently experienced a stressful event or were from riskier neighborhoods were more isolated. The number of children in the family was positively related to isolation. Social isolation decreases between seventh and eighth grades.     

激光捕获显微切割技术用于分离混合斑中精子细胞

目的 评估激光捕获显微切割(laser capture microdissection.LCM)技术在分离混合斑中少量精子细胞的应用价值.方法 配制不同比例的精液-阴道上皮细胞混合液.分别用差异裂解法和LCM法分离精子细胞,用磁珠法提取精子细胞DNA,并用IdentifilerTM试剂盒进行STR基因型检测.结果 LC...     

The blast injury as a result of underwater explosion

Experiments on pigs were made for determination of safe distance to blast center for a diver using the isolating breathing apparatus IDA-71U and aqualung AVM-5. The animals were placed at the distance 12, 9, 7 and 5 m from the blast center. After the explosion, basic physiological parameters and severity of traumas were monitored. Differences in morphological characteristics of the damage done on the earth and under water were identified. Safe distance was 12 m.     

The fingernails of Mary Sullivan: developing reliable methods for selectively isolating endogenous and exogenous DNA from evidence

The fingernails of Mary Sullivan, the last victim of the Boston Strangler, were examined to determine if any genetic information about the murderer could be obtained. The nails were extremely friable necessitating the development of new techniques for isolating and purifying DNA. DNA yields from nails were optimized by using a NaOH-based preparation technique, which was simple, efficient, and minimized handling. Methods for selectively and thoroughly removing exogenous material on nails were also developed through use of a species-specific PCR assay, wherein mitochondrial DNA from the nail could easily be differentiated from DNA of contaminating cells.     

Application of a radiometric method for evaluation of loss of salicylic acid during isolation from biologic material

A radiometric method for evaluation of loss of salicylic acid in the process of isolation from biologic material is described. According to this study the mean loss during the total process of isolation amounts to 33.59%, the specific values being 19.47% during protein precipitation, 10.68% during extraction, and 3.44% during evaporation of solvent.     

Sodium monochloroacetate poisoning of greenfinches.

A large number of passerine birds, mainly greenfinches, were found dead or dying in a hedgerow close to a field of onions recently sprayed with sodium monochloroacetate (SMCA). An analytical method is described for isolating monochloroacetic acid from bird tissues, as its potassium salt, by ion exchange chromatography. The ion exchange eluate is evaporated to dryness, acidified, extracted with ether and the ethereal extract methylated with diazomethane. The concentration of the methyl ester of monochloroacetic acid is determined using the Mass Selective Detector in the selected ion mode. Chemical analysis confirmed the exposure of the birds to SMCA. It is calculated that 50 microliter of spray contained the lethal dose of SMCA for a greenfinch.     

The analysis of tiapride in cadaveric material

To optimize conditions of tiapride isolation from cadaveric organs, we compared the results of conventional methods by Stas-Otto, A.A. Vasilyeva and V.F. Kramarenko which provide tiapride isolation up to 50% and a new precise and reproducible method providing 60 +/- 2% tiapride isolation. Identification of tiapride isolated from cadaveric material was made with thin-layer chromatography and high performance liquid chromatography. The latter assay employed the method of external standard. The original techniques proposed identify and measure tiapride in hepatic samples in the presence of unidentified endogenic compounds. The techniques are rapid, selective, sensitive and reproducible.     

Determination of trasodone in cadaveric material

Methods of trasodone isolation from cadaveric material by water and acetonitrile at pH-2.0, which may be used in expert practice, were developed. Acetonitrile method is recommended for everyday practice as it allows one to isolate about 60% of trasodone and to obtain extracts with lower content of extractive substances. Detection limit in case of trasodone isolation by acidified water is 50 micrograms in 25 g of the liver and by acetonitrile--25 micrograms in 25 g of the liver and kidney.     

PCR-based identification of postmortem microbial contaminants--a preliminary study.

Investigation of postmortem blood can reveal the presence of significant ethanol levels. However, in some instances it cannot easily be determined if the source of ethanol is from ingestion or from postmortem endogenous fermentation by contaminating microbes. Described here is a robust polymerase chain reaction (PCR)-based method for detecting the presence of common ethanol producing microbial contaminants in human blood. A set of DNA primers were designed for use in PCR to amplify and detect the genomic DNA from humans and three test microorganisms Escherichia coli, Proteus vulgaris, and Candida albicans. A rapid and reproducible protocol was developed for isolating genomic DNA from mixed human blood-microorganism samples that yields a suitable template for PCR. The organism-specific primer pairs can detect the presence of the target microorganisms in human blood at concentrations as low as 10 colony forming units/mL. The PCR products readily can be detected after agarose gel electrophoresis. This method provides an additional means of rapidly identifying microbial contaminants in postmortem blood samples.     

Identification of the source of ivory idol by DNA analysis

In this study, we describe a forensic case dealing with the identification of the source of the processed ivory object by DNA analysis. Two pieces of Lord Krishna's idols from a shop were confiscated by an investigating agency of the Indian government and forwarded to us to identify the source of its origin. We succeeded in isolating DNA from both processed ivory idols by using the phenol/chloroform DNA extraction method. The extracted DNA was subjected to PCR amplification using an elephant-specific mitochondrial DNA (mtDNA) D-loop marker. DNA sequence analysis of the amplified fragment of mtDNA D-loop region confirmed that the idols were consistent with Asian elephant with 99% similarity.