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毒鼠強(qiáng)在中毒死亡犬體內(nèi)死后再分布的研究

發(fā)布時(shí)間:2018-07-11 15:38

  本文選題:毒鼠強(qiáng) + 死后分布; 參考:《山西醫(yī)科大學(xué)》2006年碩士論文


【摘要】:目的 (1) 建立毒鼠強(qiáng)灌胃致死的動(dòng)物模型和死后再分布研究動(dòng)物模型;觀察犬的毒鼠強(qiáng)中毒表現(xiàn)和死后各組織臟器的病理變化; (2) 研究毒鼠強(qiáng)在灌胃死亡犬體內(nèi)的分布、死后再分布規(guī)律,為毒鼠強(qiáng)中毒案件的法醫(yī)學(xué)鑒定提供科學(xué)依據(jù); (3) 建立毒鼠強(qiáng)死后彌散研究動(dòng)物模型,研究毒鼠強(qiáng)在犬體內(nèi)的死后彌散特點(diǎn),探討毒鼠強(qiáng)死后再分布的機(jī)制。 方法 1.動(dòng)物模型及檢材提取 1.1 死后分布模型 取犬6只,將犬左側(cè)臥位固定于犬臺(tái),按3倍LD_(50)劑量(0.46mg/kg體重)(根據(jù)人毒鼠強(qiáng)LD_(50)(0.1mg/kg)按體型系數(shù)推算),用米湯汁稀釋至0.1mg/ml灌胃,等體積米湯汁沖洗。觀察其生命體征變化,心跳、呼吸和角膜反射全部消失后,迅速解剖動(dòng)物,采集心、肺、肝、脾、腎、胃、腦、膽汁、尿、心血、周?chē)图∪獾冉M織臟器和體液,檢測(cè)其中毒鼠強(qiáng)含量,每只犬的檢材在24h內(nèi)檢測(cè)完畢。 1.2 死后再分布模型 取犬9只,隨機(jī)分為常溫實(shí)驗(yàn)組(3只)、4℃實(shí)驗(yàn)組(3只)和-20℃實(shí)驗(yàn)組(3只)。染毒方法同死后分布模型。分別置于常溫、4℃和-20℃保存,于死后0、2、4、8、24、48和72h分別取心血、周?chē)、肝臟、大腦和肌肉,檢測(cè)其中毒鼠強(qiáng)含量。死后72h解剖犬,提取心、肝、脾、肺、腎、腦和心血等檢材,檢測(cè)其中毒鼠強(qiáng)含量。 1.3 死后彌散模型 取犬6只,隨機(jī)分為灌胃后去胃組(3只)和處死后灌胃(3只)組。 處死后灌胃組 將犬左側(cè)位固定于犬臺(tái),置胃管后,夾閉氣管,,待呼吸、心跳和角膜反射消失后,按3倍LD_(50)劑量(0.46mg/kg體重)(根據(jù)人毒鼠強(qiáng)LD_(50)(0.1mg/kg)按體型系數(shù)推算),用米湯汁稀釋至0.1mg/ml灌胃,等體積米湯汁沖洗。置于室溫下,于灌胃后0、2、4、8、24和48不同時(shí)間點(diǎn)取心血,每次取材后將肌肉和皮膚逐層縫合,盡量保持機(jī)體的完整性。死后72h解剖犬,提取心、肝、脾、肺、腎、腦和心血等檢材,檢測(cè)其中毒鼠強(qiáng)含量。 灌胃后去胃組 染毒死方法同死后分布模型。當(dāng)犬死亡后立即開(kāi)腹,結(jié)扎幽門(mén)和賁門(mén),去除胃,將肌肉和皮膚逐層縫合,置于室溫下,檢材提取和檢測(cè)同處死后灌胃實(shí)驗(yàn)組。 2.病理檢材處理 實(shí)驗(yàn)犬角膜反射、呼吸和心跳全部消失時(shí),迅速解剖動(dòng)物,取心、肝、脾、肺、腎、腦、胃和肌肉等組織,用4%甲醛固定,石蠟包埋,切片,HE染色,光鏡下觀察。 3.毒鼠強(qiáng)的檢測(cè) 組織勻漿后,堿化處理,苯萃取,氣相色譜/質(zhì)譜聯(lián)用檢測(cè),利用毒鼠強(qiáng)氣相色譜t_r和質(zhì)譜特征離子峰定性,內(nèi)標(biāo)法和工作曲線(xiàn)法定量。
[Abstract]:Objective (1) to establish the animal model of tetramine to kill by stomach and to study the animal model of postmortem redistribution. To observe the manifestation of tetramine poisoning in dogs and the pathological changes of tissues and organs after death. (2) to study the distribution of tetramine in dead dogs and the regularity of postmortem redistribution. To provide scientific basis for forensic identification of tetramine poisoning cases. (3) to establish the animal model of dispersion study of tetramine after death. To study the postmortem dispersion of tetramine in dogs and the mechanism of postmortem redistribution of tetramine. Methods 1. Animal model and sample extraction 1.1 postmortem Six dogs were selected from the distribution model. The left supine position of the dog was fixed on the canine table. At the dose of 3 times LD50 (0.46mg/kg body weight) (calculated according to the body shape coefficient of human tetramine LD50 (0.1mg/kg), the dog was diluted with rice soup to 0.1mg/ml and washed with equal volume rice soup. To observe the changes of vital signs, heartbeat, respiration and corneal reflex, dissect animals rapidly, collect heart, lung, liver, spleen, kidney, stomach, brain, bile, urine, heart blood, peripheral blood and muscle, and other tissue organs and body fluids. The content of tetramine was detected. The samples of each dog were detected within 24 hours. They were randomly divided into 4 鈩

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