STR analysis of artificially degraded DNA-results of a collaborative European exercise

Degradation of human DNA extracted from forensic stains is, in most cases, the result of a natural process due to the exposure of the stain samples to the environment. Experiences with degraded DNA from casework samples show that every sample may exhibit different properties in this respect, and that it is difficult to systematically assess the performance of routinely used typing systems for the analysis of degraded DNA samples. Using a batch of artificially degraded DNA with an average fragment size of approx. 200 bp a collaborative exercise was carried out among 38 forensic laboratories from 17 European countries. The results were assessed according to correct allele detection, peak height and balance as well as the occurrence of artefacts. A number of common problems were identified based on these results such as strong peak imbalance in heterozygous genotypes for the larger short tandem repeat (STR) fragments after increased PCR cycle numbers, artefact signals and allelic drop-out. Based on the observations, strategies are discussed to overcome these problems. The strategies include careful balancing of the amount of template DNA and the PCR cycle numbers, the reaction volume and the amount of Taq polymerase. Furthermore, a careful evaluation of the results of the fragment analysis and of automated allele calling is necessary to identify the correct alleles and avoid artefacts.     

深入理解“三个代表”重要思想的关键是转换思维方式

思维方式的解放较之观念的解放是更为根本的思想解放.要使主体能够内化"三个代表"重要思想,必须具备与这一思想相通的思维方式.这就需要积极推进由传统的"革命党思维"向"执政党思维"转换,这是当前保持与时俱进精神状态、深入理解"三个代表"重要思想的关键.     

知情同意原则下医疗过失损害赔偿责任的几个问题--从一起患者知情同意纠纷案说起

知情同意原则所保护的客体是自我决定权.知情同意原则下的损害赔偿责任不同于医疗事故损害赔偿责任.二者不能互相否认.医方违反知情同意原则的责任是一种侵权损害赔偿责任.该责任的构成要件可包括(1)医师存在法定的告知义务;(2)医师未能将对患者的决定产生实质性影响的风险/信息告知患者;(3)在告知不充分的情况下,患者由于选择了当前的治疗方案而受到伤害;(4)医师的义务违反与患者的伤害之间存在因果关系.其中,告知义务是否充分的判断应以处于同样情境的一个理性患者所需作为主要的标准;对信息"实质性"的判定应看一个与患者处于同一位置的合理审慎之人在决定是否对所建议的治疗做出同意时会对某一事实赋加重要性或将该事实作为一"决定性"影响因素加以考虑;在因果关系存无的认定上,则要考虑若患者被充分告知实情他是否会做出不同的选择决定.     

家兔急性胰腺炎死后不同时间眼玻璃体液淀粉酶变化

目的探讨急性胰腺炎死后不同时间眼玻璃体液淀粉酶变化。方法用1%牛胆酸钠诱导家兔急性胰腺炎动物模型建立,于死后不同时间和正常对照组,观察其淀粉酶变化。结果家兔急性胰腺炎死后72h眼玻璃体液淀粉酶含量(x)与死亡时间(y)存在相关关系,并导出其二项式回归方程为y=8.7420 0.7699x-0.0083x2(R2=92.62792,F=14.89734,P=0.001)。可作为推定早期损伤时间的参考指标。结论家兔急性胰腺炎死后不同时间眼玻璃体液淀粉酶改变为法医早期死亡时间推断提供了灵敏客观的实验依据。     

Eight short tandem repeats (STR) frequencies for descendants from Terena indigenous Brazilian group

POPULATION: descendants from Terenas an indigenous group.     

Postmortem citalopram concentrations: alone or along with other compounds

Citalopram, an antidepressant whose use has become more widespread in Spain in recent years participates directly and indirectly in the lethal mechanism in voluntary and involuntary poisonings. There were 30 cases of autopsies in the Madrid region where citalopram and other psychoactive substances (psychotropic drugs, alcohol, opiates) were detected in the corpses. The postmortem citalopram levels in relation to the manner and mechanism of death were evaluated, and a significant difference between the toxic and nontoxic cases (p < 0.01) was found. We studied the citalopram blood levels alone and along with other psychoactive products, and these cases were then further divided into those where the compounds were at deadly levels and those which were not. We found a range of citalopram levels between 0.37 and 0.83 microg/mL in which some cases were associated with citalopram toxicity and others were not. Citalopram blood levels of less than 0.35 microg/mL did not lead to fatal poisoning when it was the sole substance detected.     

Interpretation of postmortem change in cadavers in Spain

Estimating time since death is especially difficult in the examination of poorly preserved cadavers and depends on the experience of the examiner and comparison with previously documented cases showing similar characteristics. The present study reports on information obtained over the past ten years through the work of the Laboratorio de Antropología y Odontología Forense (LAF) of the Instituto Anatómico Forense de Madrid, Spain, in particular evaluating how the type of fracture influences postmortem change. From the original 225 forensic cases examined between 1992 and 2002 in the LAF, a sample of 29 cases were selected from various regions of the Spanish mainland. A data collection protocol was established to reflect factors which the existing specialized literature, documenting the relation existing in the sample analyzed between time since death and the extent of postmortem change, which in the environments examined are distributed into the following phases: Phase 1 (putrefaction): one week to one month on the surface and two months in water. Phase 2 (initial skeletonization): two months on the surface and five to six months in water. Phase 3 (advanced skeltonization): six months to 1.5 years on the surface and 2.5 years buried. Phase 4 (complete skeletonization): about one year on the surface and three years buried. This paper also provide useful information on the impact of carrion insect activity, location, climate, seasonality, and predator.     

TRICARE Program; inclusion of anesthesiologist assistants as authorized providers; coverage of cardiac rehabilitation in freestanding cardiac rehabilitation facilities. Final rule

This final rule establishes a new category of provider as an authorized TRICARE provider and it increases the settings where cardiac rehabilitation can be covered as a TRICARE benefit. It recognizes anesthesiologist assistants (AAs) as authorized providers under certain circumstances. It also authorizes cardiac rehabilitation services, which are already a covered TRICARE benefit when provided by hospitals, to be provided in freestanding cardiac rehabilitation facilities.     

Allele frequencies data and statistic parameters for 16 STR loci-D19S433, D2S1338, CSF1PO, D16S539, D7S820, D21S11, D18S51, D13S317, D5S818, FGA, Penta E, TH01, vWA, D8S1179, TPOX, D3S1358-in the Rio de Janeiro population, Brazil

Allele frequencies for 16 short tandem repeats (STR) loci were determined with a sample of 230-300 unrelated individuals from the population of Rio de Janeiro, Brazil. The loci are the most commonly used in forensic and paternity testing, being analysed by the Identifiler (Applied Biosystems) and PowerPlex 2.1 (Promega) commercial kits. It was proved that Penta E and D18S51 are the most polymorphic loci.