裂解汽油在ZSM-5沸石上的芳构化

采用连续流动反应装置,考察了裂解汽油在HZSM-5与金属元素改性的HZSM-5上的芳构化反应,发现锌改性后提高了液体产物中芳烃的收率。为了克服裂解汽油中含硫含焦杂质的影响,提出了获取芳烃的有效工艺:蒸馏除焦-加氢预脱硫-氢气氛下芳构化反应-冷凝产物。用氨吸附的程序升温脱附法,将催化剂的酸性质与其催化芳构化作用进行关联,认为Zn改性后的HZSM-5催化剂具有较温和的酸中心,可能是其芳构化高活性与高选择性的原因。     

修订车间空气中溶剂汽油容许浓度的研究

通过对969例汽油作业工人的体格检查和对86个作业点760次车间内汽油浓度的测定结果表明,在达标的条件下,工人仍有神经衰弱,植物神经功能障碍的临床症状,说明现行车间的卫生标准应当进行修订。根据动物实验资料计算 MAC,180汽油为198.6mg/m~3,120汽油为225.0mg/m~3,二者相差不大,我们建议车间空气中溶剂汽油容许浓度可修订为200mg/m~3。     

Recreational gasoline sniffing: acute gasoline intoxication and latent organolead poisoning. Case reports and literature review

Gasoline is a readily obtainable intoxicant that unfortunately lends itself to habitual abuse by sniffing, a practice found particularly among children and adolescents. The concerted effects of the multiple hydrocarbon and other constituents of gasoline result in a predictable acute toxic syndrome. Organoleads, primarily tetraethyl lead (TEL), cause a separate toxicologic symptom-sign complex that overlaps with the initial acute toxic syndrome. The different clinical symptomatology, effects on hemoglobin synthesis, and response to chelation therapy are all in keeping with the view that organolead poisoning is a separate and distinct toxicologic entity from that of classical elemental lead poisoning or "plumbism".     

军事航空医学查新咨询服务的创新实践与成效

基于查新咨询服务,介绍了培育军事航空医学情报研究品牌、开展查新专题定题跟踪服务、建立航空医学信息专题推送平台、整合航空医学资源建设、开展航空医学专业情报方法学研究等实践经验,并通过对查新咨询研究规律的探索,总结了军事航空医学查新咨询服务的成效。     

硬脂酸与溶剂汽油用于病理制片的临床应用

目的消除二甲苯对人体的毒害作用,改善病理工作者的工作环境,预防职业病的发生。方法应用硬脂酸与溶剂汽油替代二甲苯用于病理石蜡制片。结果所有活体组织的HE染色、各种组织化学染色和免疫组织化学染色均获得满意效果。结论硬脂酸与溶剂汽油可以取代二甲苯用于病理石蜡制片。     

FCC汽油萃取蒸馏脱硫效果

开展了萃取蒸馏法脱除催化裂化（FCC）汽油含硫化合物的研究。在改进的Eliss气液两相双循环型蒸馏器上测定汽油在不同溶剂中的萃取蒸馏分离系数,筛选出N-甲酰基吗啉为最佳脱硫萃取蒸馏溶剂。在连续萃取蒸馏小试装置上,通过单因素试验考察了N-甲酰基吗啉的FCC汽油脱硫效果。优化的工艺条件：回流比1,剂油体积比0.7,塔釜温度160 ℃,塔顶精制油体积收率达64.18%,硫质量浓度26.03 mg/L,总脱硫率达86.30%。PONA分析结果表明,萃取蒸馏过程还能有效地将大部分高辛烷值的烯烃组分转移到低硫精制油中,可作为优良的欧IV标准高辛烷值汽油调和组分。     

化工工艺设计过程中几种决策方法的应用

催化裂化汽油通过加氢处理可有效降低硫含量,是清洁汽油或清洁汽油调和油生产的重要过程。随着环保标准的日益严格,汽油加氢技术的研发和使用正日益受到重视,在技术开发、工艺设计、项目投资的过程中要面临诸多决策问题,从管理学角度对不同级别决策问题适用的决策方法和模型进行了介绍,并对定量决策方法、定性决策方法以及定量与定性相结合的决策方法使用场合提出了一些建议。     

民航飞行员心理疲劳研究现状与未来研究方向

通过国内外文献分析,概述心理疲劳理论研究现状,讨论了目前国内外民航飞行员心理疲劳研究现状、存在的主要问题。针对目前心理疲劳理论及测评方法在民航飞行员应用中的局限性,提出了系统开展本土化民航飞行员心理疲劳研究的主要方向。     

Color vision in civil aviation

Color vision deficiency (CVD) is a condition that results in individuals being unable to distinguish differences between certain colors. Occupational color vision standards were introduced in aviation in 1919 by The Aeronautical Commission of the International Civil Air Navigation Authority. Concern has been expressed during the last few years that the current color vision standards in aviation may be too stringent and, at the same time, also variable across the world. The tests employed do not always reflect the tasks pilots encounter in today’s aviation environment. This ambiguity leads to the possible exclusion of deserving applicants for selection as aircrew. The compatibility of CVD with aircraft crew is assessed by medical personnel using clinical diagnosis tests on the ground level. These clinical tests were developed specifically to detect the presence, nature, and severity of CVD. No clinical tests yet provide a measure of operational performance in operating an aircraft. Arbitrary pass marks have been assigned to clinical tests such that a failing candidate will either be subject to operational restrictions or excluded completely. The prescribed clinical tests and associated pass marks vary considerably between regulators. While an individual may be subject to no restrictions in one jurisdiction, they may be excluded in another. This article highlights newer diagnostic techniques adopted by different countries for assessing color vision to see for the scope of evidence-based guidelines for minimum color vision requirements for flight crew as well as for civil aviation in India.     

空军数字化医院建设研究

阐述了空军医院在军队卫勤保障中的地位和作用,分析了加强数字化医院建设的紧迫性和必要性,从空军卫勤保障全局和空军卫勤信息化建设的角度提出了加快推进空军数字化医院建设的目标以及未来一个时期建设的主要任务,以期为空军数字化医院的发展提供参考。