From population- to subject-based limits of T/E ratio to detect testosterone abuse in elite sports

In elite sports, indirect testing of testosterone abuse is mainly based on the testosterone over epitestosterone (T/E) ratio. Since this marker is characterized by a small ratio of intra- to inter-individual variation, it is surprising that current anti-doping strategy uses a screening test based on a population-based limit. From a database of more than 15,000 steroid profiles obtained from routine controls, the collection of steroids profiles of 11 elite athletes followed during 2 years, and a longitudinal study involving 17 amateur athletes, 8 of which were orally administrated testosterone undecanoate pills, we selected 12 case studies to represent the possible scenarios to which the anti-doping laboratories are confronted. Various detection strategies at the disposal of the laboratories are employed and discussed, including isotope ratio mass spectrometry (IRMS) analysis and a Bayesian interpretation of the T/E-time profile. The weak sensitivity versus specificity relation of a population-based limit for the T/E ratio is outlined. As a result, we propose a Bayesian screening test whose T/E threshold progressively evolves from a population basis to a subject basis as the number of individual test results increases. We found that this screening test heightens drastically the capacity to detect testosterone abuse, at no additional financial and administrative expenses for anti-doping authorities.     

The testosterone/cortisol ratio moderates the proneness to anger expression in antisocial and borderline intimate partner violence perpetrators

Several studies have provided evidence that antisocial, borderline and narcissistic personality traits of intimate partner violence (IPV) perpetrators significantly increase proneness to violence. In addition, an imbalance between testosterone (T) and cortisol (C) levels has been observed in this population, making individuals prone to violence. We aimed to establish whether IPV perpetrators differ in personality traits, T/C ratio and anger expression from controls, and also to examine the moderating role of the T/C ratio in the relationship between personality traits and anger expression. The sample consisted of 16 IPV perpetrators and 20 controls. T/C ratio was obtained as the quotient between salivary T and C levels. Anger expression and personality traits were measured with STAXI-2 and MCMI-III, respectively. Our results indicate that IPV perpetrators have higher antisocial, borderline and narcissistic personality traits and anger expression than controls. Nonetheless, they did not differ in basal T/C ratio. Finally, only in IPV perpetrators there was a positive relationship between these variables, the T/C ratio playing a moderating role in the relationship of antisocial and borderline traits with anger expression. In IPV perpetrators the T/C ratio may explain why certain personality traits are associated with high risk of becoming violent.     

Morphine to codeine concentration ratio in blood and urine as a marker of illicit heroin use in forensic autopsy samples

A morphine to codeine ratio greater than unity (M/C>1) has been suggested as an indicator of heroin use in living individuals. The aim of this study was to examine the morphine to codeine ratio in a large population (N=2438) of forensically examined autopsy cases positive for 6-monoacetylmorphine (6-MAM) and/or morphine in blood and/or urine. Blood and urine concentrations of 6-MAM, morphine and codeine were examined using GC-MS and LC-MS/MS methods. In 6-MAM positive samples, the M/C ratio was greater than unity in 98% (N=917) of the blood samples and 96% (N=665) of the urine samples. Stratification of 6-MAM negative cases by M/C above or below unity revealed similarities in morphine and codeine concentrations in cases where M/C>1 and 6-MAM positive cases. Median blood and urine morphine concentrations were 8-10 times greater than codeine for both groups. Similarly to 6-MAM positive cases, 25-44 year-old men prevailed in the M/C>1 group. In comparison to cases where M/C ≤ 1, the M/C ratio was a hundred times higher in both 6-MAM positive and M/C>1 cases. The range of morphine concentration between the lowest and the highest quintile of codeine in M/C>1 cases was similar to that in 6-MAM positive cases. This range was much higher than for M/C ≤ 1 cases. Moreover, linear regression analyses, adjusted for age and gender, revealed a strong positive association between morphine and codeine in 6-MAM positive and M/C>1 cases. The M/C ratio appeared to be a good marker of heroin use in post-mortem cases. Both blood and urine M/C>1 can be used to separate heroin users from other cases positive for morphine and codeine.     

Variations in pulp/tooth area ratio as an indicator of age: a preliminary study

This paper details a method for age determination of adults from single rooted teeth. The sample consisted of 100 Italian white Caucasian patients (46 men, 54 women) aged between 18 and 72 years. The single rooted maxillary right canine was utilized in this preliminary study. Pulp/root ration, tooth length, pulp/tooth length ratio, pulp/tooth area and pulp/root width ratios at three different levels were computed. Pearson's correlation coefficients between age and these variables showed that the ratio between pulp and tooth area correlated best with age (r2 = 0.85). Stepwise multiple regression models yielded a linear relationship between pulp/root width at mid-root level and chronological age and a linear relationship when pulp/tooth area was compared to age. Statistical analysis indicated that these two variables explain 84.9% of variations in estimated chronological age. The median of the absolute value of residual errors between actual and estimated ages was less than four years.     

Side effects: a dose of competition and access to care

The Federal Trade Commission and Department of Justice 2004 report Improving Health Care: A Dose of Competition argues in favor of increasing competition among health care providers. Several of the proposals within the report, however, may pose risks for access to care. The report urges that the current system of implicit cross-subsidies for indigent care be replaced with insurance expansions that provide coverage to individuals. Such a substitution would certainly enhance access, but would be very costly and likely require considerable government intervention in the health care system. In the absence of a substantial expansion in coverage, reductions in cross-subsidies could limit access to care through the existing safety net. The report argues that insurance mandates limit access to care by driving up cost and reducing choice. In some cases, such as mental health and substance abuse, however, the unregulated market may not cover a benefit at all, leaving people with less coverage and less choice. Finally, the report stresses the importance of linking costs to quality. Such a linkage is likely to lead to a health care system in which poor people obtain poor-quality care at low prices--a result that many would find disturbing.     

The role of competition in health care: a Western European perspective

The Federal Trade Commission and Department of Justice 2004 report Improving Health Care: A Dose of Competition expresses a clear allegiance to competition as the organizing principle for health care. In Europe, by contrast, the key organizing principle of health care systems is solidarity. Solidarity means that all have access to health care based on medical needs, regardless of ability to pay. This is not to say that competition is not important in Europe, but competition must take place within the context of solidarity. This article critiques the report from a European perspective, describes the role of competition in Europe (focusing in particular on European Union law), and suggests that the United States could learn from the European perspective.     

亲权指数和个体识别似然比计算软件的开发与应用

目的建立计算亲子鉴定亲权指数(PI)和个体识别似然比(LR)的计算软件。方法依据相关行业规范和文献中给出的计算方法,利用计算机语言Visual Basic 6.0编写程序。结果开发出适用于PI和LR的计算软件。结论该计算软件可以帮助工作人员提高计算效率,服务法医物证工作。     

Workplace drug testing in a military organization: Results and experiences from the testing program in the Finnish Defence Forces

In the military environment drug abuse is a particular risk for occupational safety. In the Finnish Defence Forces a drug testing program was conducted in 2002–2005; soldiers, professional civilians, and military students were tested when applying for a work or right to study; furthermore, annually 5% of the personnel were subjected to random testing. In total, over 2000 urine samples were analyzed in an accredited laboratory for cannabis, opiates, amphetamines, or cocaine. In this article, the drug testing program as a part of the anti-drug strategy of the Finnish Defence Forces is described, and the findings including practical experiences and financial expenses are reported. Only one person applying for a civilian post tested positive for amphetamine and cannabis. In seven other samples codeine and morphine were detected; these were, however, due to prescribed medication, not drug abuse. In the execution of the program, no particular difficulties were reported. In conclusion, it seems that the use of illicit drugs in the Finnish military is extremely rare, at least partly due to the successful anti-drug strategy. After an elaborate planning, even an extensive drug testing program can be executed without substantial setbacks. In the future, the effectiveness of drug testing programs as a means of improving occupational safety needs to be investigated in controlled studies using comparative design.     

Simultaneous determination of THC-COOH and THC-COOH-glucuronide in urine samples by LC/MS/MS

A fast method using liquid-liquid extraction and HPLC/tandem-mass spectrometry (LC/MS/MS) was developed for the simultaneous detection of 11-Nor-Delta(9)-tetrahydrocannabinol-9-carboxylic acid beta-glucuronide (THC-COOH-glucuronide) and 11-Nor-Delta(9)-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in urine samples. This highly specific method, which combines chromatographic separation and MS/MS analysis, can be used for the confirmation of positive immunoassay results even without hydrolysis of the sample or derivatisation of extracts. Liquid-liquid extraction was optimised: with ethylacetate/diethylether (1:1, v/v) THC-COOH-glucuronide and THC-COOH could be extracted in one step. Molecular ions of the glucuronide (MH(+), m/z 521) and THC-COOH (MH(+), m/z 345) were generated using a PE/SCIEX turboionspray source in positive ionisation mode; specific fragmentation was performed in the collision cell of an API 365 triple-quadrupole mass spectrometer and yielded major fragments at m/z 345 (for THC-COOH-glucuronide) and m/z 327 as well as m/z 299 for both cannabinoids. Chromatographic separation was performed using a reversed-phase C8 column and gradient elution with 0.1% formic acid/1 mM ammonium formate and acetonitrile/0.1% formic acid. Retention times were 22.2 min for the glucuronide and 26.8 min for THC-COOH. After enzymatic hydrolysis of urine samples with beta-glucuronidase/arylsulfatase (37 degrees C, 5 h), THC-COOH-glucuronide was no longer detectable by LC/MS/MS in urine samples. However, the THC-COOH concentration was increased. For quantitation of THC-COOH, THC-COOH-D(3) was added to the urine samples as internal standard prior to analysis. From the difference of THC-COOH in the native urine and urine after enzymatic hydrolysis, molar concentration ratios of THC-COOH-glucuronide/THC-COOH in urine samples of cannabis users were determined and found to be between 1.3 and 4.5.     

氟乐灵的检验

目的建立氟乐灵的提取方法和检验方法。方法用液-液萃取法、固相萃取法提取生物检材中氟乐灵,然后用气相色谱法及薄层色谱法进行分析。结果氟乐灵在强酸性条件下提取率最高,在乙醚和苯溶剂中提取率较高,并且用混合溶剂提取优于单一溶剂提取。固相萃取的优越性不明显,而液-液萃取法显得更简单、快速。结论所建立的方法快速准确,效果良好。     

生物检材中芬太尼和舒芬太尼的HPLC-MS/MS分析

目的建立血、肝组织中芬太尼和舒芬太尼的HPLC-MS/MS分析方法。方法采用Oasis（MCX固相萃取柱进行提取,以XTerraTMRP18柱（2.1mm×100mm,3.5μm）色谱柱分离,以乙腈∶5mmol/L醋酸铵水溶液（氨水调pH=9.5）（65∶35）为流动相,流速为0.2mL/min。结果血及肝组织添加样品的线性范围为10ng/mL～500ng/mL,最小检出限为0.1ng/mL。结论本方法准确、快速,可用于生物检材血、肝组织中芬太尼和舒芬太尼的定性定量分析。     

SARM-S4 and metabolites detection in sports drug testing: a case report

Recently, pharmaceutical industry developed a new class of therapeutics called Selective Androgen Receptor Modulator (SARM) to substitute the synthetic anabolic drugs used in medical treatments. Since the beginning of the anti-doping testing in sports in the 1970s, steroids have been the most frequently detected drugs mainly used for their anabolic properties. The major advantage of SARMs is the reduced androgenic activities which are the main source of side effects following anabolic agents' administration. In 2010, the Swiss laboratory for doping analyses reported the first case of SARMs abuse during in-competition testing. The analytical steps leading to this finding are described in this paper. Screening and confirmation results were obtained based on liquid chromatography tandem mass spectrometry (LC-MS/MS) analyses. Additional information regarding the SARM S-4 metabolism was investigated by ultra high-pressure liquid chromatography coupled to quadrupole time-of-flight mass spectrometer (UHPLC-QTOF-MS).     

Bullying among adolescents in North Cyprus and Turkey: testing a multifactor model

Peer bullying has been studied since the 1970s. Therefore, a vast literature has accumulated about the various predictors of bullying. However, to date there has been no study which has combined individual-, peer-, parental-, teacher-, and school-related predictors of bullying within a model. In this sense, the main aim of this study was to test a multifactor model of bullying among adolescents in North Cyprus and Turkey. A total of 1,052 adolescents (554 girls, 498 boys) aged between 13 and 18 (M = 14.7, SD = 1.17) were recruited from North Cyprus and Turkey. Before testing the multifactor models, the measurement models were tested according to structural equation modeling propositions. Both models indicated that the psychological climate of the school, teacher attitudes within classroom, peer relationships, parental acceptance-rejection, and individual social competence factors had significant direct effects on bullying behaviors. Goodness-of-fit indexes indicated that the proposed multifactor model fitted both data well. The strongest predictors of bullying were the psychological climate of the school following individual social competence factors and teacher attitudes within classroom in both samples. All of the latent variables explained 44% and 51% of the variance in bullying in North Cyprus and Turkey, respectively.     

Determination of triptolide and wilforlide A in biological samples by LC-MS/MSCSCD

Objective: To determinate triptolide and wilforlide A in biological samples by liquid chromatography-tandem mass spectrometry (LC-MS/MS) method and to verify the method. Methods: After 0.4 mL blood, urine or 0.4 g hepatic tissues with internal standard were extracted by ethyl acetate, they were separated on a Allure PFP Propyl (100 mm × 2.1 mm, 5 μm) with a mobile phase of methanol-20 mmol/L ammonium acetate using gradient elution. For mass spectrometric detection, electrospray ionization (ESP) in positive mode was elected and the data was collected using multiple-reaction monitoring (MRM). Results: The linearity was good (r>0.9950) and the limit of detection was 2 ng/mL or 2 ng/g for triptolide and wilforlide A. The recovery was 61.08%-102.98%. The intra-day and inter-day precision was less than 12.58% for each biological sample, and the accuracy was 90.61%-105.80%. Conclusion: This method is simple, convenient and good selective, and could be applied to analysis of triptolide and wilforlide A in different biological samples. And the method may provide technical support for forensic medicine identification, clinical diagnosis and treatment of tripterygium wilfordii Hook. f. poisoning. © 2015 by the Editorial Department of Journal of Forensic Medicine.     

Extortion,competition among states and private investment in a federation: evidence from Indian manufacturing sector

Economic Change and Restructuring - The paper argues both theoretically and empirically that incidence of extortion reduces the flow of private investment at a state in a federation. The states...     

Analysis of hydrogen peroxide field samples by HPLC/FD and HPLC/ED in DC mode

The goal of this paper is to describe applications of two recently developed HPLC methods for the analysis and confirmation of the presence of hydrogen peroxide residues in field studies. The procedure utilizes two different HPLC systems, one with post-column derivatization followed by fluorescence detection (HPLC/FD), and the other with electrochemical detection (HPLC/ED). The two systems were utilized to detect hydrogen peroxide in a variety of typical forensic samples including pre- and post-blast samples, as well as a series of environmental control samples. Peroxide-based organic explosives were also examined due to their propensity to produce peroxide residues following detonation. Because samples collected from post-blast scenes are frequently shipped or stored prior to analysis, the effects of storage time, temperature and type of substrate material on the recovery of hydrogen peroxide residues were also investigated. The combined results of the study demonstrate the capability of two HPLC approaches with selective detection in the analysis and investigation of suspected incidents involving peroxide based explosives.     

利用Q-TOFLC/MS建立二级谱图数据库快速检测90种农药的初步研究

目的建立90种农药的数据库（含二级谱图）,以达到快速筛选检验该范围内的未知样品目的。方法优化一种Q-TOF LC/MS分析条件,将90种农药分别依次进行Q-TOF LC/MS-MS二级谱图分析,利用PCDL软件建立数据库。并同时实验了血样中10种不同浓度农药（100ng/mL、500ng/mL）的添加实验,对建库方法进行了验证。结果阳性识别率在80%以上。结论本方法简便灵敏、快速实用。