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低温等离子体在舰船空气净化处理中的应用
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作者 刘辉 杜红霞 《船海工程》 北大核心 2017年第3期156-159,共4页
采用低温等离子体直接处理和低温等离子体-吸附技术联合处理2种方式,分别开展对沙林模拟剂DMMP的降解试验。低温等离子体直接处理染毒空气实验中,分别考察脉冲电压、脉冲频率、初始浓度和放电时间等因素对DMMP降解率的影响,并对DMMP降... 采用低温等离子体直接处理和低温等离子体-吸附技术联合处理2种方式,分别开展对沙林模拟剂DMMP的降解试验。低温等离子体直接处理染毒空气实验中,分别考察脉冲电压、脉冲频率、初始浓度和放电时间等因素对DMMP降解率的影响,并对DMMP降解产物进行分析。结果表明,降解率随脉冲电压、脉冲频率、放电时间的增加而增加,随初始浓度的增加而降低。同时发现产物中含有CO2、H2O、丙酸、甲基磷酸甲酯和磷酸等。低温等离子体-吸附技术联合净化处理染毒空气的研究结果表明,DMMP被强电离放电气体迅速降解,分解了污染物,实现吸附剂的再生。 展开更多
关键词 低温等离子体 染毒空气 净化处理
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Ames试验的两种方法测试粮食防霉剂二氯甲烷致突变性 被引量:2
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作者 曾令福 周洪明 曾果 《现代预防医学》 CAS 1989年第2期30-33,共4页
粮食防霉剂往往存在有高毒、高残留和防霉效果差的问题,故寻找新的高效、低毒、低残留防霉剂是当前努力的方向,尤其对防止收割后含水量尚高的粮谷类食品霉变,优质防霉剂的使用则十分重要。
关键词 粮食防霉剂 AMES试验 防霉效果 突变性 氯甲烷 粮谷类 掺入法 空气染毒 正定霉素 致突变物
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Noninvasive assessment of hepatic fibrosis in Egyptian patients with chronic hepatitis C virus infection 被引量:6
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作者 Shawky Abdelhamid Fouad Serag Esmat +2 位作者 Dalia Omran Laila Rashid Mohamed H Kobaisi 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第23期2988-2994,共7页
AIM: To evaluate the accuracy of specific biochemical markers for the assessment of hepatic fibrosis in patients with chronic hepatitis C virus (HCV) infection. METHODS: One hundred and fifty-four patients with chroni... AIM: To evaluate the accuracy of specific biochemical markers for the assessment of hepatic fibrosis in patients with chronic hepatitis C virus (HCV) infection. METHODS: One hundred and fifty-four patients with chronic HCV infection were included in this study; 124 patients were non-cirrhotic, and 30 were cirrhotic. The following measurements were obtained in all patients: serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), albumin, total bilirubin, prothrombin time and concentration, complete blood count, hepatitis B surface antigen (HBsAg), HCVAb, HCV-RNA by quantitative polymerase chain reaction, abdominal ultrasound and ultrasonic-guided liver biopsy. The following ratios, scores and indices were calculated and compared with the results of the histopathological examination: AST/ALT ratio (AAR), age platelet index (API), AST to platelet ratio index (APRI), cirrhosis discriminating score (CDS), Pohl score, G teborg University Cirrhosis Index (GUCI). RESULTS: AAR, APRI, API and GUCI demonstrated good diagnostic accuracy of liver cirrhosis (80.5%, 79.2%, 76.6% and 80.5%, respectively); P values were: < 0.01, < 0.05, < 0.001 and < 0.001, respectively. Among the studied parameters, AAR and GUCI gave the highest diagnostic accuracy (80.5%) with cutoff values of 1.2 and 1.5, respectively. APRI, API and GUCI were significantly correlated with the stage of fibrosis (P < 0.001) and the grade of activity (P < 0.001, < 0.001 and < 0.005, respectively), while CDS only correlated significantly with the stage of fibrosis (P < 0.001) and not with the degree of activity (P > 0.05). In addition, we found significant correlations for the AAR, APRI, API, GUCI and Pohl score between the non-cirrhotic (F0, F1, F2, F3) and cirrhotic (F4) groups (P values: < 0.001, < 0.05, < 0.001, < 0.001 and < 0.005, respectively; CDS did not demonstrate significant correlation (P > 0.05). CONCLUSION: The use of AAR, APRI, API, GUCI and Pohl score measurements may decrease the need for liver biopsies in diagnosing cirrhosis, especially in Egypt, where resources are limited. 展开更多
关键词 Age platelet index Aspartate aminotrans-ferase platelet ratio index Aspartate aminotransferase-to-alanine aminotransferase ratio Cirrhosis discrimi-nating score Fibrosis evaluation G^teborg UniversityCirrhosis Index Hepatitis C virus infection Liver fibro-sis Pohl score
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