In one series, infection was the most common etiology of death in extremely low birth weight infants (56 of 111); congenital pneumonia accounted for 30 of these 56 infections [7]. Pneumonia caused by maternal enteric organisms frequently accompanies chorioamnionitis and/or funisitis in these congenital infections.
Diphenylguanidine is one of common accelerators for the vulcanization of rubber in combination with thiazoles and sulfenamides. Though it does not show better activity than thiuram and dithiocarbamates, it has better stability.
DNA (2â²-deoxyribonucleic acid) is the molecular store of genetic information in nearly all living systems. It is a large polymeric molecule composed of monomers known as nucleotides. Each nucleotide consists of a heterocyclic base, a pentose sugar (2â²-deoxy-d-ribofuranose), and a phosphate group. There are four heterocyclic bases in DNA: adenine (A), guanine (G), cytosine (C) and thymine (T). Their structures and numbering system are shown in Figure 1.