Oxidants are compounds capable of withdrawing electrons from target atoms or molecules, thus initiating chemical reactions. In biological systems, oxidative modifications are often related to structural, functional and regulatory changes. Partially reduced oxygen species, also known as oxygen-derived free radicals, represent the most important group of biologically relevant oxidants. Significan...

During lagging strand DNA replication, the Okazaki fragment maturation machinery is required to degrade the initiator RNA with high speed and efficiency, and to generate with great accuracy a proper DNA nick for closure by DNA ligase. Several operational parameters are important in generating and maintaining a ligatable nick. These are the strand opening capacity of the lagging strand DNA polym...

currently, cosmetic surgery is spread around the world. several factors are involved in this rapidly evolving field such as socio-economic development, changes in cultural norms, globalization and the effects of western culture, advertising, media, and mental disorders. nowadays the cosmetic surgery is becoming a profitable business, which deals exclusively with human appearance and less from t...

in the process of revelation, divine message is transmitted from the sublime lord and by the prophet to the people. this heavenly message can be considered from several aspects, including that of invitation as a separate category. the present article deals with the linguistic dimension of invitation in the qur’an, specifically in the context of meccan suras. hence, the structure of invitation l...