Chloramination is often the disinfection regimen of choice for extended drinking water systems. However, this process is prone to instability due to the growth of nitrifying bacteria. This is the first study to use alternative approaches for rapid investigation of chloraminated drinking water system instability in which flow cytometric cell sorting of bacteria with intact membranes (membrane-in...

The rootes of Chinese sage, Salvia miltiorrhiza Bunge (labieteae) are used to prepare an important traditional medicine in the Chinese pharmacoepia, Dan Shen. Indeed, related members of this genus are common traditional medicines throughout the world, making Salvia species the targets of intense phytochemical investigations. The active constituents of these species have been reported to be seve...

Sulfate-reducing bacteria (SRB) in anoxic waters and sediments are the major producers of methylmercury in aquatic systems. Although a considerable amount of work has addressed the environmental factors that control methylmercury formation and the conditions that control bioavailability of inorganic mercury to SRB, little work has been undertaken analyzing the biochemical mechanism of methylmer...

In this study, methanol and ether extracts of five endemic Asperula species (Rubiaceae) from Turkey (A. antalyensis, A. brevifolia, A. pseudochlorantha, A. purpurea subsp. apiculata and A. serotina), used in the traditional system of medicine, were tested for antimicrobial activity by the agar well diffusion method and the broth dilution method. The most active species were Asperula brevifolia ...

The rootes of Chinese sage, Salvia miltiorrhiza Bunge (labieteae) are used to prepare an important traditional medicine in the Chinese pharmacoepia, Dan Shen. Indeed, related members of this genus are common traditional medicines throughout the world, making Salvia species the targets of intense phytochemical investigations. The active constituents of these species have been reported to be seve...

The title probes are precursors to kinetically calibrated, aryl-substituted cyclopropylcarbinyl radicals that rearrange with picosecond lifetimes. Applications in studies of cytochrome P450-catalyzed hydroxylation reactions are reviewed. Initially confusing results regarding lifetimes of radicals in the hydroxylation reactions were resolved when second-generation probes that distinguish between...

The variable patterns of DNA methylation in mammals have been linked to a number of physiological processes, including normal embryonic development and disease pathogenesis. Active removal of DNA methylation, which potentially regulates neuronal gene expression both globally and gene specifically, has been recently implicated in neuronal plasticity, learning and memory processes. Model pathways...