In simple terms, the wood cell wall is a composite made of a rigid cellulose polymer in a matrix of lignin and the hemicelluloses. The lignin polymer in the middle lamella and S2 layer is thermoplastic; that is, it softens upon heating. The glass transition temperature Tg of the lignin in the matrix is approximately 170°C (338°F). Above the matrix Tg, it is possible to cause the lignin to under...

objective: some data are available on the association between components of the insulin resistance syndrome and serum ferritin. insulin resistance is observed in patients with polycystic ovary syndrome (pcos) we hypothesize that body iron stores might be increased in these women. materials and methods: two hundred and six people (103 pcos patients and 103 healthy women who were matched for age)...

In this paper, we empirically examine how the revenue model (paid, free, or freemium) adopted for a given app affects the app revenue performance as measured by the app daily revenue rank. We also study the impact of in-app purchase on this measure of performance. Moreover, we study how such relationships are contingent upon the distribution platform where the app is marketed as well as the typ...

building retailer equity increases revenue and profitability by insulating retailers from competitors. store image is the basis of retailer equity, but extant literature offers little in sight in to the empirical research which takes store image dimensions as antecedents of retailer equity. this paper establishes a theoretical and empirical basis that shows the impact of selected store image di...

background: research at undergraduate and graduate level is important in deciding career fields and future profession. the undergraduate studies are greatly enriched by doing research work. this study assess research trends among medical students by evaluating their research career choices, factors influencing their research career preferences and future plans at jinnah sind medical university ...

This paper uses phonebook records of music retailers for the entire US in the years 1998 and 2002 to examine how music downloads and online sales of records have affected the entry and exit of brick and mortar music specialty retailers. Merging music stores information with data on internet activity and broadband connectedness at the Metropolitan Statistical Area (MSA) level, with data on the n...

introduction: the motivations and reasons for choosing a specialty field among medical students that  a can be effective on training of physicians and promoting   health in the community. methods: in a cross-sectional study we investigate   factors influencing specialty choice of 429 medical residents in ahvaz jundishapur university of medical sciences. data was collected by a questionnaire wit...