Popular Abstract in Chinese 在世界許多地方蛾類幼蟲是主要的農業害蟲，但也有蛾類養殖業為獲取其絲綢蠶繭，例如家蠶。其實它也是第一個也是最好的研究揮發性有機分子用於傳遞信息的昆蟲研究模型。一般來說是雌蛾釋放信息素通過很長的距離來吸引雄性同類，而且具有出色的靈敏度和特異性。至今有記載的蛾類信息素都屬於同一類化合物(脂肪酸衍生物), 在信息素腺體內合成。信息素的生物合成涉及到脂肪酸的脫飽合，碳鏈縮短，並最終還原，乙酰化或氧化成醛等。這些反應過程中的酶已經進化到具有專一性，專門用於生產複雜的化學信號，使得蛾類的信息素存在豐富的化學多樣性。在本論文中，首先對幾個脫飽和酶進行研究。第一篇文章對冬尺蠖的脫飽合酶進行克隆並在酵母中通過異源表達證明了它具有把順十一,順十四,順十七-二十碳三烯酸轉化成順十一,順十四,順十七,十九-二十碳四烯酸的能力。這是有史以來第一個對甲基端脫飽合酶Moth caterpillars are major agricultural pests in many parts of the world. In general female moths attract male mates with their pheromone over long distance. Most of the described moth pheromones belong to the same class of chemical compounds, fatty acid derivatives that are produced de novo in the pheromone gland. The pheromone biosynthesis involves desaturation, chain-shortening by β-oxidation

Abstract is not available

The purpose of this paper is to propose a new approach for categorizing the body of knowledge captured in the existing literature, past and present in such a way that contributions to the use side of systems development are made explicit. The new twist of this approach is that it seeks to bridge the most prevalent divides currently fragmenting the IS literature by offering an integrative classific

This thesis concerns the role played by immigrant organisations today. It focuses on the way in which the national context and especially the corporative, social welfare, and integration systems affect such roles. The thesis is structured around the hypothesis that immigrant organisations are shaped by their interaction with political opportunity structures which function as links between the broa

Popular Abstract in Swedish Inflammation is a protective response against injury or infection (the invading microbes or their toxins) with the aim being the removal of causal agent followed by the repair process. Without inflammation, infections would go unchecked and wounds would not heal. However, inflammation is like a double-edged sword. Though it is mainly a protective response, some times, iThe pro-inflammatory mediator, Leukotriene D4 (LTD4) is a product of arachidonic acid cascade and has been implicated in asthma and inflammatory bowel diseases. Prolonged inflammatory conditions like ulcerative colitis increases the risk for the development of cancer and the factors that induce the chronic immune response remain uncertain. In this context, in the present study, we examined if expo

E. coli continues to be a popular host organism for production of recombinant proteins. To obtain a high volumetric productivity at the cultivation stage, it is important to achieve a high cell density and a high specific productivity per cell. In many fed-batch processes, the substrate feed rate eventually becomes limited by the oxygen transfer capacity of the bioreactor. While biomass can contin

Social kompetens är ett uttryck som vi vant oss vid att se i arbetsrelaterade sammanhang. Det används ofta och naturligt av många men betydelsen är inte desto mindre mycket oklar. Arbetslivsforskare har i stort sett undvikit att arbeta med begreppet. Den här artikeln ger inte heller svar på vad social kompetens är, men tecknar en orsaksbakgrund till att man i arbetslivet är så intresserad av att r

This article focuses on objects from mainland Finland retrieved in the graves of the Viking Age town Birka in the Mälalen valley, Sweden. The main questions posed in the article are what people were buried with these items and what can be concluded about their cultural identity. In the article the artefacts from mainland Finland are presented as well as their contexts. An examination of the find a