污水处理厂生物膜技术除臭的研究进展

简要论述生物除臭技术的原理,方法及其研究进展,重点介绍了生物膜除臭技术在污水处理等方面的应用情况,对生物膜除臭技术中有待解决的问题以及未来的研究方向进行了系统分析。     

L'effluvium télogène actinique: une facette de la chronobiologie humaine

A seasonal increased hair loss is frequently recognized in clinical practice. However, such an aspect of chronobiology has rarely been documented. To evaluate the seasonal influence on the hair cycle, trichograms of 2857 subjects who complained of an increased hair loss were collected during two consecutive years. An increased frequency of telogen effluvium was observed between July and October. The seasonal effluvium appears to be more summer effect than autumnal in regions whose latitude is over the Tropic of Cancer. The influence of ultraviolet light is possible. It might correspond to an actinic effluvium manifesting itself in some individuals among the whole population.     

Chemical composition of sex pheromone of oriental fruit moth and rates of release by individual female moths

The sex pheromone emitted by individual calling females of the oriental fruit moth,Grapholita molesta, was trapped within glass capillaries, and the composition and release rates were determined by gas chromatography-mass spectrometry. Aerial release of (Z)-8-dodecenyl acetate ranged up to 25.3 ng/hr, while the mean release rate was 8.48 ± 7.26 ng/hr (±SD). The proportion of (E)-8-dodecenyl acetate to (Z)-8-dodecenyl acetate was remarkably constant (4.20 ± 0.60%). Significant amounts of dodecyl acetate were also recovered but, contrary to previous reports, only trace quantities of (Z)-8-dodecenol were detected in the effluvium.Work carried out while on work transfer to CSIRO, Canberra.     

污水臭气催化燃烧的工艺条件研究

在催化燃烧装置中装填含铂的国产催化剂，进行炼油污水臭气脱除试验，结果表明，国产催化剂能成功地脱除这种臭气，当催化床层温度升至350℃，臭气中的烃类净化率达到98％，净化气残余总烃浓度符合GB 16297-1996大气污染物综合排放标准。     

垃圾焚烧发电厂防臭处理研究

恶臭污染作为一种感觉公害,已成为世界环境公害之一。本文将简单介绍恶臭污染的特点、除臭方法及监测标准等,并通过工程设计实例,着重介绍在垃圾焚烧发电厂中恶臭污染的防治手段。     

Causes of hair loss and the developments in hair rejuvenation

Hair is considered to be a major component of an individual's general appearance. The psychological impact of hair loss results in a measurably detrimental change in self-esteem and is associated with images of reduced worth. It is not surprising that both men and women find hair loss a stressful experience. Genetic hair loss is the major problem affecting men and by the age of 50, up to 50% will be affected. Initial attempts to regenerate the lost hair have centred on applying a topical solution of between 2% to 5% minoxidil; however, the results proved disappointing. Recently, finasteride, a type II 5α reductase inhibitor has been found to regrow a noticeable amount of hair in about 40% of balding men. Further developments in treatments have lead to the use of a dual type I and type II inhibitor where 90% of those treated regrow a noticeable amount of hair. In women the major cause of hair loss before the age of 50 is nutritional, with 30% affected. Increased and persistent hair shedding (chronic telogen effluvium) and reduced hair volume are the principle changes occurring. The main cause appears to be depleted iron stores, compromised by a suboptimal intake of the essential amino acid l -lysine. Correction of these imbalances stops the excessive hair loss and returns the hair back to its former glory. However, it can take many months to redress the situation.