Forensic Analysis of Human Autopsy Tissue for the Presence of Polydimethylsiloxane (Silicone) and Volatile Cyclic Siloxanes using Macro FT‐IR,FT‐IR Spectroscopic Imaging and Headspace GC‐MS

This study describes effective and straightforward primary and secondary methods for the detection of silicone in human autopsy tissue. The primary method is polydimethylsiloxane (PDMS) specific and employs either macro‐attenuated total reflection Fourier transform infrared (ATR‐FT‐IR) spectroscopy for samples with a high PDMS concentration (relative to that of the matrix) or micro‐FT‐IR spectroscopic imaging in a reflection/absorption modality for samples with a low PDMS concentration. Although the secondary method is not PDMS specific, it employs headspace gas chromatography with mass spectrometric detection (HS/GC‐MS) for the detection of low molecular weight volatile cyclic siloxanes (VCS), which are characteristic marker compounds for PDMS. Overall, the combined results from the primary and secondary analyses provide reliable evidence for the presence of silicone.     

Development and Validation of a Technique for Casting Anatomical Features and Toolmarks

Time may elapse between examination of marks inflicted on the body and comparison with a potential weapon. Two‐dimensional photographs may be inadequate for effective comparison of a three‐dimensional mark with a putative instrument. Taking a cast and producing a positive image results in a lasting three‐dimensional record. This project aimed to develop and demonstrate the accuracy of an easy technique for production of long‐lasting positive images (using plaster of Paris and dental alginate). Casts of facial features of embalmed cadavers were used to produce a positive image of the face (death mask). Measurements of distances between facial anatomical landmarks were compared with measurements of distances between the same landmarks on the death masks to assess accuracy of reproduction. There were no significant differences between cadaver and death mask in 6 of 9 measurements, indicating this technique has high accuracy with less mobile facial features, but produces deformation of pliable features.     

间接酶标抗体染色法检测石蜡切片中鸡肾型传染性支气管炎病毒的研究

以抗鸡肾型传染性支气管炎病毒（ＮＩＢＶ）Ｔ株的鼠源超免疫血清为一级抗体,辣根过氧化物酶（ＨＲＰ）标记的羊抗鼠ＩｇＧ为二级抗体,建立了检测石蜡切片中ＮＩＢＶ抗原的间接酶标抗体染色技术。经过特异性试验和阻断性试验,表明该方法具有高度的敏感性和特异性。应用该法对人工感染ＮＩＢＶＣ９００１株的鸡气管和肾石蜡切片中的病毒抗原进行了检测,结果：气管从感染后０．５～１１ｄ,肾从感染后１～２０ｄ,均检测到病毒抗原,阳性染色主要集中于气管粘膜上皮细胞和肾小管上皮细胞浆内。     

甲醛固定及石蜡包埋组织的DNA分型及其应用

目的：建立甲醛固定及石蜡包埋组织ＤＮＡ的基因分型方法并使之应用于实际检案。方法：用Ｃｈｅｌｅｘ和有机溶剂提取法提取ＤＮＡ,以ＰＣＲ与反向探针杂交技术作ＰＭ和ＨＬＡ－ＤＱＡ１位点分型。结果：２６份包埋组织块有２４份能得到理想的分型结果。结论：本法可用于法医学个人识别和亲子鉴定     

债的相对性原则的突破与完善

债的相对性或合同的相对性一直以来为两大法系所确认,在债法特别是合同法领域中占有十分重要的地位。但是近代各国立法及判例对它已有突破,产生了为第三人利益合同、第三人侵害债权及债的保全等制度。我国也应顺应世界潮流,在民法典中坚持债的相对性原则,完善第三人利益合同制度,建立第三人侵害债权制度和细化债的保全制度。     

小鼠卵巢组织玻璃化冷冻保存的研究

为了探索小鼠卵巢组织玻璃化冷冻保存的有效方法,以5周龄昆明小白鼠的卵巢为材料,分别采用不同的冷冻保护剂、平衡时间、冷冻载体和组织块大小对小鼠卵巢组织进行玻璃化冷冻保存。玻璃化冷冻保存的基本程序:取小白鼠卵巢,切块,玻璃化冷冻。玻璃化冷冻效果评判的方法是解冻玻璃化冷冻保存的卵巢组织块,收集其中的未成熟卵,体外培养和体外受精,观察其体外成熟、体外受精及所形成胚胎的发育能力。结果表明,小鼠卵巢组织玻璃化冷冻保存以卵巢组织块大小为1mm3、以半麦管作为载体、在75mL/LED(EG+DMSO)中平衡15min、以用150mL/L ED玻璃化冷冻液处理3min的方法,冷冻保存效果最好。     

A novel approach for fingerprinting mummified hands

Abstract:  Fingerprinting has long been used as a method for identifying bodies and, since first discovered, many advances have been made in both fingerprint acquisition and interpretation. However, in the field of forensic pathology, the attainment of fingerprints from mummified bodies has remained difficult. The most common technique historically used to obtain fingerprints in these cases usually employs the amputation of the fingers combined with soaking and/or injecting the fingers with various solutions in order to enhance the fingerprints. A novel approach to fingerprinting mummified fingers is presented which involves removal and rehydration of the fingerpads (including the epidermal, dermal, and adipose tissues) followed by inking and rolling, using a gloved finger for support. The technique presented produces a superior quality of print without amputation of the finger, yielding excellent results and assisting in obtaining positive identification.     

Soft Tissue Decomposition of Submerged,Dismembered Pig Limbs Enclosed in Plastic Bags*

Abstract: This study examines underwater soft tissue decomposition of dismembered pig limbs deposited in polyethylene plastic bags. The research evaluates the level of influence that disposal method has on underwater decomposition processes and details observations specific to this scenario. To our knowledge, no other study has yet investigated decomposing, dismembered, and enclosed remains in water environments. The total sample size consisted of 120 dismembered pig limbs, divided into a subsample of 30 pig limbs per recovery period (34 and 71 days) for each treatment. The two treatments simulated non‐enclosed and plastic enclosed disposal methods in a water context. The remains were completely submerged in Lake Ontario for 34 and 71 days. In both recovery periods, the non‐enclosed samples lost soft tissue to a significantly greater extent than their plastic enclosed counterparts. Disposal of remains in plastic bags therefore results in preservation, most likely caused by bacterial inhibition and reduced oxygen levels.     

劳动担保合同存废论——兼论确立劳动人事一般保证制度

对于劳动担保合同,言废者有之,言存者有之。从现实来看,一方面,《劳动合同法》关于不得要求劳动者提供担保的规定未能消除大量存在的劳动担保合同;另一方面,劳动担保合同领域存在的乱象亦亟需疏导规制。因此,劳动担保合同既不可简单废除,也不能轻言存续。正确的选择是既要从严控制劳动担保合同的订立和适用,也要在立法上留有余地,确立特定行业岗位的劳动人事一般保证制度,不实行连带保证制度。     

妇科肿瘤和乳腺癌组织常染色体和X染色体STR的突变分析

目的探讨妇科肿瘤组织和乳腺癌组织的法医学常用STR基因座突变类型和规律,以及显微切割技术在肿瘤组织法医学鉴定中的应用。方法应用Power Plex 21 System和Argus X-12试剂盒对62例乳腺癌患者,62例妇科恶性肿瘤患者,10例良性妇科肿瘤患者外周血、肿瘤组织和癌旁组织DNA样本进行复合扩增,获得STR分型,并选取存在突变的部分肿瘤组织进行显微切割。结果妇科恶性肿瘤患者外周血的STR分型与癌旁组织一致;46.77%的妇科恶性肿瘤组织中观察到4种STR突变类型,显著高于良性肿瘤的STR突变率(P0.01)和乳腺癌的STR突变率(P=0.009)。显微切割获得的间质细胞的STR分型与癌旁组织一致。结论本研究所检测的STR基因座在妇科恶性肿瘤组织中的稳定性较差,不适用于该系统肿瘤组织的法医学鉴定;显微切割技术可准确分离间质细胞,能够代表肿瘤来源个体的正常DNA分型,是解决此类案件法医学鉴定的一种有效方法。