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...

Globally, the annual number of new infections among children (0-14 years) has almost halved since 2010 with a 47% reduction in new HIV cases.1 Since 1995, an estimated 1.6 million new HIV infections among children have been averted due to the provision of antiretroviral medicines (ARVs) to women living with HIV during pregnancy and breastfeeding. The vast majority of these infections (1.3 milli...

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 ...

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...

Essential medicines are those that satisfy the priority healthcare needs of the population and are available at all times in adequate amounts, in the appropriate dosage forms with assured quality and at a price the individual and community can afford. Essential medicines are selected with due regard to disease prevalence, efficacy, safety and cost effectiveness. In most developing countries, th...

The first WHO essential drugs list, published in 1977, was described as a peaceful revolution in international public health. The list helped to establish the principle that some medicines were more useful than others and that essential medicines were often inaccessible to many populations. Since then, the essential medicines list (EML) has increased in size; defining an essential medicine has ...