• Title/Summary/Keyword: charred body

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Experimental Study for DNA Fingerprint from Teeth of Charred Body (소사체 치아에서의 유전자지문 분석을 위한 실험적 연구)

  • Jong-Hoon Choi
    • Journal of Oral Medicine and Pain
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    • v.21 no.2
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    • pp.351-367
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    • 1996
  • In the field Of individual identification in forensic Science, if the body is charred, it is sometimes impossible to identify the morphologic changes and charred tissue such as blood, muscle and bone can not be identified by forensic microbiologic method such as DNA typing. So the author used the characteristics of teeth which is relatively firm compare to other organs and stable to external environment such as heat and also possess cells needed for the DNA typing. The author conducted the experiment on teeth to detect DNA related to individual identification regarding to temperature in which other charredorgans can not be detected. The experiment was done on 64 extracted third molars consisted of unheated ones, and heated teeth to $100^{\circ}C$, $150^{\circ}C$, $200^{\circ}C$ for 45 min, 90 min, and 120 min respectively and to $250^{\circ}C$ for 45 min. DNA was extracted from each tooth and amplified fragment length polymorphism procedure(AMP-FLPs) using polymerase chain reaction(PCR) was applied and observed for the matching DNA in HumTH01 and HumCD4 locus and the followings Are the results : 1. It was able to detect matching DNA in HumTH01 and HumCD4 locus in every teeth which no heating has been done. 2. It was able to detect matching DNA in HumTH01 and HumCD4 locus in every teeth heated to $100^{\circ}C$ for 45, 90 and 120 min. 3. It was able to detect matching DNA in HumTH01 and HumCD4 locus in teeth heated to $l00^{\circ}C$, $200^{\circ}C$ for 45, 90, 120 min. 4. It was impossible to detect matching DNA in HumTH01 and HumCD4 locus in teeth heated to $250^{\circ}C$. So, it is possible to extract DNA from teeth that otherwise can not be extracted from other organs in the charred body and it can be concluded that teeth are highly reliable and applicatable as forensic odontology for individual identification.

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A Case Report on Dental Identification in the KAL Air Disaster (KAL기 사고시 소사체의 개인식별감정 1예)

  • 김종열;신형식
    • Journal of Oral Medicine and Pain
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    • v.8 no.1
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    • pp.61-67
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    • 1983
  • Authors observed a corpse which is died from "Charring", caused by air disaster, for the purpose of individual identification. This is an identifide case of the charred corpse due to the fire while landing of KAL 747 Jumbo(HL 7445) at Kimpo airport Nov.1980. It was referred to author in the state of carbonization by high degree of heat-as unknown body entirely. But teeth condition and treated condition were well preserved under mouth closing and by the comparative examination of antermortem dental records, dental radiographs, the individual identification was simply accomplished. Therefore, it brought repeatedly a recognition of the practical effectiveness of dental identification and importance or dental records.

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Physicochemical Characteristics of Bamboo Smoke Distillates Processed by Mechanical Steel Kiln and Traditional Earth Kiln (기계식 탄화로와 재래식 토요를 이용하여 제조한 죽초액의 이화학적 특성: 식품처리제로서의 특성)

  • 이범수;은종방
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.31 no.2
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    • pp.251-256
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    • 2002
  • Fresh bamboo (Phyllostachys bambuoides sieb. et zucc.) was charred at the mechanical steel kiln and traditional earth kiln with subsequent condensation of its smoke to 10$0^{\circ}C$. It was settled down for 12 months to remove tar components and then the middle layer of the liquid was collected as a bamboo smoke distillates to analyze its chemical composition and physicochemical characteristics for use as food additives or processing aids. The gravity, transmittance, reflectivity, and viscosity were 1.008, 89.05%, 1.36%, and 12.48 cp in the bamboo smoke distillates processed by mechanical steel kiln (MBSD) and 1.012, 98.33%, 1.34% and 9.05 cp in the bamboo smoke distillates by traditional earth kiln (TBSD), respectively. The color of TSBD was brighter than that of MBSD. The pH and titratable acidity, tar and remains were 3.55 and 2.830%, 2.803% and 0.671%, respectively, in the MBSD and 2.93 and 3.470%, 0.051% and 0.004%, respectively, in the TBSD. The major phenolic compounds of bamboo smoke distillates (BSD) were phenol, Ο-cresol, p-cresol, and guaiacol and the major organic acids were acetic acid, propionic acid, iso-butyric acid, and n-butyric acid, and major alcohols were methanol, furfuryl alcohol, and maltol. The contents of phenolic compound and alcohol were more in MBSD than in TBSD whereas the content of organic acid was more in TBSD than in MBSD. Therefore, toxic compounds for the human body, such as methanol from BSD should be removed for use as a food ingredient in the future.