Journal of forensic sciences最新文献

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Sexual dimorphism of pelvic scarring: A new method of adult biological sex estimation 骨盆瘢痕的性别双态性:成人生物学性别估计的新方法。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-22 DOI: 10.1111/1556-4029.15587
Georgina Ives MSc, Sarah E. Johns PhD, Chris Deter PhD
{"title":"Sexual dimorphism of pelvic scarring: A new method of adult biological sex estimation","authors":"Georgina Ives MSc,&nbsp;Sarah E. Johns PhD,&nbsp;Chris Deter PhD","doi":"10.1111/1556-4029.15587","DOIUrl":"10.1111/1556-4029.15587","url":null,"abstract":"<p>Estimating biological sex is a crucial aspect of forensic anthropology, and is pivotal in forensic investigations. Presently, the most frequently adopted osteological sex estimation methods focus on the anterior pelvis, which is easily susceptible to postmortem damage, revealing a need for additional accurate methods. This study introduces a novel method for estimating adult sex through metric pelvic scar analysis, using a known skeletal sample (169 females; 51 males). Relationships between sex and scar dimensions were subjected to Kendall's tau-B testing, and the strongest associated measurements were further analyzed using binary logistic regression to determine their predictive capacity. The final estimation method was tested on an additional known-sex sample of 43 males and 43 females from the Spitalfields skeletal collection. All associations between biological sex and scar measurements were significant, with the preauricular sulcus and newly defined inferior interosseous cavity presenting the strongest relationships (τb 0.223–0.504). Individual regression models using the approximate volume of each feature predicted sex with over 80% accuracy, but when combined in a single regression model, the accuracy increased to an impressive 97.1%. When then applied to the validation sample, the final estimation model achieved an accuracy of 90.7%. These results highlight the high estimation accuracy achieved by simultaneously utilizing the approximate volume of the sulcus and the inferior cavity. This is not only highly accurate but also utilizes the sturdier posterior pelvis, making it a promising tool for forensic investigations and the wider field of osteology.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 6","pages":"1959-1971"},"PeriodicalIF":1.5,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1556-4029.15587","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141736216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Review of SNP assays for disaster victim identification: Cost, time, and performance information for decision-makers 灾难受害者鉴定的 SNP 检测方法回顾:为决策者提供成本、时间和性能信息。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-17 DOI: 10.1111/1556-4029.15585
Katherine Butler Gettings PhD, Andreas Tillmar PhD, Kimberly Sturk-Andreaggi PhD, Charla Marshall PhD
{"title":"Review of SNP assays for disaster victim identification: Cost, time, and performance information for decision-makers","authors":"Katherine Butler Gettings PhD,&nbsp;Andreas Tillmar PhD,&nbsp;Kimberly Sturk-Andreaggi PhD,&nbsp;Charla Marshall PhD","doi":"10.1111/1556-4029.15585","DOIUrl":"10.1111/1556-4029.15585","url":null,"abstract":"<p>In mass disaster events, forensic DNA laboratories may be called upon to quickly pivot their operations toward identifying bodies and reuniting remains with family members. Ideally, laboratories have considered this possibility in advance and have a plan in place. Compared with traditional short tandem repeat (STR) typing, single nucleotide polymorphisms (SNPs) may be better suited to these disaster victim identification (DVI) scenarios due to their small genomic target size, resulting in an improved success rate in degraded DNA samples. As the landscape of technology has shifted toward DNA sequencing, many forensic laboratories now have benchtop instruments available for massively parallel sequencing (MPS), facilitating this operational pivot from routine forensic STR casework to DVI SNP typing. Herein, we present the commercially available SNP sequencing assays amenable to DVI, we use data simulations to explore the potential for kinship prediction from SNP panels of varying sizes, and we give an example DVI scenario as context for presenting the matrix of considerations: kinship predictive potential, cost, and throughput of current SNP assay options. This information is intended to assist laboratories in choosing a SNP system for disaster preparedness.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1546-1557"},"PeriodicalIF":1.5,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1556-4029.15585","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature and pH-dependent stability of fentanyl analogs: Degradation pathways and potential biomarkers 芬太尼类似物随温度和 pH 值变化的稳定性:降解途径和潜在生物标记物
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-12 DOI: 10.1111/1556-4029.15578
Madison Schackmuth BS, Sarah Kerrigan PhD
{"title":"Temperature and pH-dependent stability of fentanyl analogs: Degradation pathways and potential biomarkers","authors":"Madison Schackmuth BS,&nbsp;Sarah Kerrigan PhD","doi":"10.1111/1556-4029.15578","DOIUrl":"10.1111/1556-4029.15578","url":null,"abstract":"<p>The collection, storage, and transport of samples prior to and during analysis is of utmost importance, especially for highly potent analogs that may not be present in high concentrations and are susceptible to pH or thermally mediated degradation. An accelerated stability study was performed on 17 fentanyl analogs (fentalogs) over a wide range of pH (2–10) and temperature (20–60°C) conditions over 24 h. Dilute aqueous systems were used to investigate temperature and pH-dependent kinetics using liquid chromatography–tandem mass spectrometry (LC–MS/MS). Liquid chromatography-quadrupole/time-of-flight-mass spectrometry (LC-Q/TOF–MS) was used for structural elucidation of degradants. With the exception of remifentanil, all fentalogs evaluated were stable at pH 6 or lower. Fentalogs were generally unstable in strongly alkaline environments and at elevated temperatures. Remifentanil was the least stable drug and N-dealkylated fentalogs were the most stable. Fentanyl degraded to acetylfentanyl, norfentanyl, fentanyl N-oxide, and 1-phenethylpyridinium salt (1-PEP). A total of 26 unique breakdown products were observed for 15 of the fentanyl derivatives studied. Common degradation pathways involved N-dealkylation, oxidation of the piperidine nitrogen, and β-elimination of N-phenylpropanamide followed by oxidation/dehydration of the piperidine ring. Ester and amide hydrolysis, demethylation at the propanamide, and O-demethylation were observed for selected fentalogs only. The potential for analyte loss should be considered during the pre-analytical phase (i.e., shipping and transport) where environmental conditions may not be controlled, as well as during the analysis itself.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1799-1814"},"PeriodicalIF":1.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141602320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Osteon shape variation in the femoral diaphysis: A geometric-morphometric approach on human cortical bone microstructure in an elderly sample 股骨干骺端的骨形态变化:老年样本人体皮质骨微观结构的几何形态计量学方法。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-11 DOI: 10.1111/1556-4029.15584
Luisa Leiss MSc, Tshegofatso Ramphaleng PhD, Nicholas Bacci PhD, Tobias M. R. Houlton PhD, Julieta G. García-Donas PhD
{"title":"Osteon shape variation in the femoral diaphysis: A geometric-morphometric approach on human cortical bone microstructure in an elderly sample","authors":"Luisa Leiss MSc,&nbsp;Tshegofatso Ramphaleng PhD,&nbsp;Nicholas Bacci PhD,&nbsp;Tobias M. R. Houlton PhD,&nbsp;Julieta G. García-Donas PhD","doi":"10.1111/1556-4029.15584","DOIUrl":"10.1111/1556-4029.15584","url":null,"abstract":"<p>Geometric morphometrics (GMM) have been applied to understand morphological variation in biological structures. However, research studying cortical bone through geometric histomorphometrics (GHMM) is scarce. This research aims to develop a landmark-based GHMM protocol to depict osteonal shape variation in the femoral diaphysis, exploring the role of age and biomechanics in bone microstructure. Proximal, midshaft, and distal anatomical segments from the femoral diaphysis of six individuals were assessed, with 864 secondary intact osteons from eight periosteal sampling areas being manually landmarked. Observer error was tested using Procrustes ANOVA. Average osteonal shape and anatomical segment-specific variation were explored using principal component analysis. Osteon shape differences between segments were examined using canonical variate analysis (CVA). Sex differences were assessed through Procrustes ANOVA and discriminant function analysis (DFA). The impact of osteonal size on osteonal shape was investigated. High repeatability and reproducibility in osteon shape landmarking were reported. The average osteon shape captured was an elliptical structure, with PC1 reflecting more circular osteons. Significant differences in osteon shape were observed between proximal and distal segments according to CVA. Osteon shape differed between males and females, with DFA showing 52% cross-validation accuracies. No effect of size on shape was reported. Osteonal shape variation observed in this study might be explained by the elderly nature of the sample as well as biomechanical and physiological mechanisms playing different roles along the femoral diaphysis. Although a larger sample is needed to corroborate these findings, this study contributes to the best of our knowledge on human microanatomy, proposing a novel GHMM approach.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1826-1839"},"PeriodicalIF":1.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1556-4029.15584","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141590488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phytocannabinoid profile and potency of cannabis resin (hashish) of northwest Himalayas of India 印度喜马拉雅山西北部大麻树脂(印度大麻脂)的植物大麻素特征和功效。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-11 DOI: 10.1111/1556-4029.15583
Jyotsnessh Chauhan MSc, Binaya Kumar Bastia MD, Kanchan Kohli PhD, Babulal Chaudhary MD, Gaurav Chikara MD, Annie Gupta PhD, Ankit Kumar MD
{"title":"Phytocannabinoid profile and potency of cannabis resin (hashish) of northwest Himalayas of India","authors":"Jyotsnessh Chauhan MSc,&nbsp;Binaya Kumar Bastia MD,&nbsp;Kanchan Kohli PhD,&nbsp;Babulal Chaudhary MD,&nbsp;Gaurav Chikara MD,&nbsp;Annie Gupta PhD,&nbsp;Ankit Kumar MD","doi":"10.1111/1556-4029.15583","DOIUrl":"10.1111/1556-4029.15583","url":null,"abstract":"<p>Cannabis is one of the most consumed illicit drugs and the potency of cannabis products is of note due to health-related concerns. Hand-rubbed hashish is the ancient technique of extracting psychoactive resin from cannabis plants and is practiced in the Indian Himalayas. This study establishes the cannabinoid profile and potency of hand-rubbed hashish collected from 20 regions of the northwest Himalayas. Fifty-eight hashish samples were analyzed using a validated high-performance liquid chromatography-diode array detection (HPLC-DAD) method. Ten cannabinoids were quantified including acidic (THCA &amp; CBDA), and neutral compounds (CBDV, THCV, CBD, CBG, CBN, Δ<sup>9</sup>-THC, Δ<sup>8</sup>-THC, and CBC). The mean concentration (w/w%) of Δ<sup>9</sup>-THC is 26%; THCA is 15% and THC<sub>Total</sub> is 40% is observed in the studied hashish samples. The majority (70%) of the hashish samples were categorized in chemotype I with the THC:CBD:CBN ratio of 91:3:4, and the remaining 30% were categorized under chemotype II with the ratio of 76:15:8. Diverse qualities of hashish are produced in the studied regions as per the seed, plant selection, and skills of manual rubbing, which results in potency variations. The average difference between the least and highest potent hand-rubbed hashish of a region is 27 w/w% (THC<sub>Total</sub>). The other studied non-psychoactive cannabinoids have a mean w/w% of &lt;5%, followed by 6% of CBDA. It is concluded that the cultivated and wild cannabis fields in the northwest Himalayas belong to the drug-type cannabis subspecies. Hand-rubbed hashish holds traditional significance and impacts the current policies of legislation.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1918-1925"},"PeriodicalIF":1.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141590489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Letter to the editor—Answering the call for a scientific consensus regarding the application of retrograde extrapolation to determine blood alcohol content in DUI cases 致编辑的信--回应就应用逆推法确定酒驾案件中血液酒精含量达成科学共识的呼吁。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-11 DOI: 10.1111/1556-4029.15582
Marc A. LeBeau PhD, F-ABFT, Jennifer F. Limoges MS
{"title":"Letter to the editor—Answering the call for a scientific consensus regarding the application of retrograde extrapolation to determine blood alcohol content in DUI cases","authors":"Marc A. LeBeau PhD, F-ABFT,&nbsp;Jennifer F. Limoges MS","doi":"10.1111/1556-4029.15582","DOIUrl":"10.1111/1556-4029.15582","url":null,"abstract":"","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1935"},"PeriodicalIF":1.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141590487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pollen identification of three notorious illicit drug plants and its potential applications in forensic practice 三种臭名昭著的非法毒品植物的花粉鉴定及其在法医实践中的潜在应用。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-10 DOI: 10.1111/1556-4029.15581
Yi-Ming Wu, Li-Li Lu PhD, Gan Xie PhD, David Kay Ferguson PhD, Hong-Ling Guo PhD, Yu-Fei Wang PhD, Jin-Feng Li PhD
{"title":"Pollen identification of three notorious illicit drug plants and its potential applications in forensic practice","authors":"Yi-Ming Wu,&nbsp;Li-Li Lu PhD,&nbsp;Gan Xie PhD,&nbsp;David Kay Ferguson PhD,&nbsp;Hong-Ling Guo PhD,&nbsp;Yu-Fei Wang PhD,&nbsp;Jin-Feng Li PhD","doi":"10.1111/1556-4029.15581","DOIUrl":"10.1111/1556-4029.15581","url":null,"abstract":"<p>Opium poppy, coca and cannabis are raw materials for three notorious illicit drugs. For a long time, drug lords have been growing and smuggling these drugs in a variety of ways and channels and are continually finding new ways of trafficking their wares, which has led to the increasing difficulty of global drug enforcement. In the present paper, we propose an innovative pollen identification system for these important drug plants, which provides a tool for screening and detection of the drugs to aid in drug enforcement. By utilizing the characteristics of these fine particles, their abundant production, and high resistance to decay, we believe this tool could be applied in the following scenarios: detecting and dynamically monitoring drug cultivation activities; determining whether a suspect has been to fields of drug plants and determining whether the site has ever been planted with a drug plant and/or was involved in drug production. In the future, combined with microscope automatic image acquisition technology and intelligent image recognition technology, this pollen identification system is expected to be used to screen three notorious illicit drug plants, thus enhancing the efficiency of drug related crime investigations.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1871-1879"},"PeriodicalIF":1.5,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141565358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the privacy-performance tradeoff of reference testing in Forensic Investigative Genetic Genealogy 法医调查基因谱系中参考测试的隐私与性能权衡分析。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-08 DOI: 10.1111/1556-4029.15579
Yuchen Hu MS, Lawrence M. Wein PhD
{"title":"Analysis of the privacy-performance tradeoff of reference testing in Forensic Investigative Genetic Genealogy","authors":"Yuchen Hu MS,&nbsp;Lawrence M. Wein PhD","doi":"10.1111/1556-4029.15579","DOIUrl":"10.1111/1556-4029.15579","url":null,"abstract":"<p>During an investigation using Forensic Investigative Genetic Genealogy, which is a novel approach for solving violent crimes and identifying human remains, reference testing—when law enforcement requests a DNA sample from a person in a partially constructed family tree—is sometimes used when an investigation has stalled. Because the people considered for a reference test have not opted in to allow law enforcement to use their DNA profile in this way, reference testing is viewed by many as an invasion of privacy and by some as unethical. We generalize an existing mathematical optimization model of the genealogy process by incorporating the option of reference testing. Using simulated versions of 17 DNA Doe Project cases, we find that reference testing can solve cases more quickly (although many reference tests are required to substantially hasten the investigative process), but only rarely (<i>&lt;</i>1%) solves cases that cannot otherwise be solved. Through a mixture of mathematical and computational analysis, we find that the most desirable people to test are at the bottom of a path descending from an ancestral couple that is most likely to be related to the target. We also characterize the rare cases where reference testing is necessary for solving the case: when there is only one descending path from an ancestral couple, which precludes the possibility of identifying an intersection (e.g., marriage) between two descendants of two different ancestral couples.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1699-1705"},"PeriodicalIF":1.5,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141560609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The impacts of thermocouple insulation failure on the accuracy of temperature measurement data in forensic fire-death scenarios—Part I: Physical disintegration 热电偶绝缘失效对火灾死亡法证场景中温度测量数据准确性的影响--第一部分:物理分解。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-04 DOI: 10.1111/1556-4029.15576
David Silveira MS, Ashley Kendell PhD, Beth Shook PhD
{"title":"The impacts of thermocouple insulation failure on the accuracy of temperature measurement data in forensic fire-death scenarios—Part I: Physical disintegration","authors":"David Silveira MS,&nbsp;Ashley Kendell PhD,&nbsp;Beth Shook PhD","doi":"10.1111/1556-4029.15576","DOIUrl":"10.1111/1556-4029.15576","url":null,"abstract":"<p>Thermocouples are utilized to monitor a wide range of temperatures in industrial applications. They are also used in both fire and forensic science research to measure temperatures of fires and of materials exposed to fire. Taking accurate temperature measurements during forensic fire-death scenarios is very difficult due to direct fire exposure to thermocouples, shrinkage and destruction of tissues, and movements from pyre collapse and pugilistic posturing of human donors. This two-part study investigates the impacts on the accuracy of temperature data if the selected thermocouples are unable to withstand fire exposure. Part I (this article) provides an overview of thermocouple theory along with evidence of the physical deterioration that occurs when glass fiber-insulated thermocouple wires are overheated by exposure to fire-level temperatures in a muffle furnace. This study verified that insulation overheating causes embrittlement and disintegration, which can cause the indicated temperature to reflect a new location of measurement located far away from the original measuring junction at the thermocouple tip. Part II will discuss the measurement errors that occurred due to low electrical resistance of insulation when three different thermocouple models were passed through fire-level temperatures to measure an ice bath at a constant temperature of 0°C.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1899-1905"},"PeriodicalIF":1.5,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141536262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The impacts of thermocouple insulation failure on the accuracy of temperature measurement data in forensic fire-death scenarios—Part II: Low electrical resistance and contamination 热电偶绝缘失效对火灾死亡法证场景中温度测量数据准确性的影响--第二部分:低电阻和污染。
IF 1.5 4区 医学
Journal of forensic sciences Pub Date : 2024-07-04 DOI: 10.1111/1556-4029.15577
David Silveira MS, Ashley Kendell PhD, Beth Shook PhD
{"title":"The impacts of thermocouple insulation failure on the accuracy of temperature measurement data in forensic fire-death scenarios—Part II: Low electrical resistance and contamination","authors":"David Silveira MS,&nbsp;Ashley Kendell PhD,&nbsp;Beth Shook PhD","doi":"10.1111/1556-4029.15577","DOIUrl":"10.1111/1556-4029.15577","url":null,"abstract":"<p>Part II of this two-part article investigates the impact of thermocouple insulation failure on temperature measurement data in forensic fire-death scenarios. Two different models of glass fiber-insulated thermocouple wires (GG-K-24-SLE and HH-K-24 from Omega Engineering) were passed through a ceramic kiln at temperatures up to 1093°C to measure an ice bath at a constant 0°C. In a separate experiment, the same two models of thermocouple wire plus a BLMI-XL-K-18U-120 mineral-insulated metal-sheathed thermocouple probe were passed through a wood pallet fire to measure an ice bath. In the ceramic kiln, the effect on measurement errors was determined for short vs. long exposure lengths and clean insulation vs. insulation contaminated with pork fat. Glass fiber-insulated thermocouple wires showed severe failure in both experiments, with errors ranging from −270°C to almost 2200°C. The metal-sheathed probe showed no evidence of insulation failure and continued to accurately measure the ice bath temperature within expected margins of error around 0°C. This study highlights how exposure of inadequate thermocouples to fire-level temperatures produces severe errors in temperature data. Consequently, it will not be possible to use this data to draw any accurate conclusions about the effects of fire exposure to human donors or animal proxies.</p>","PeriodicalId":15743,"journal":{"name":"Journal of forensic sciences","volume":"69 5","pages":"1906-1917"},"PeriodicalIF":1.5,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141536263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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