Sodium pentachlorophanate (P.C.P. Na) is now considered as one of the most promising molluscicides. Field experiments with this compound against Oncomelania nosophora in Japan were reported by McMullen and others (1948; 1951), and Hunter and others (1952). Since 1955 this compound has been used for practical molluscicidal purpose in the major endemic areas of schistosomiasis in Japan. In China,...

The metalloregulatory protein ArsR, which offers high affinity and selectivity toward arsenite, was overexpressed in Escherichia coli in an attempt to increase the bioaccumulation of arsenic. Overproduction of ArsR resulted in elevated levels of arsenite bioaccumulation but also a severe reduction in cell growth. Incorporation of an elastin-like polypeptide as the fusion partner to ArsR (ELP153...

The present study proposed the isolation of arsenic resistant bacteria from wastewater. Only three bacterial isolates (MNZ1, MNZ4 and MNZ6) were able to grow in high concentrations of arsenic. The minimum inhibitory concentrations of arsenic against MNZ1, MNZ4 and MNZ6 were 300 mg/L, 300 mg/L and 370 mg/L respectively. The isolated strains showed maximum growth at 37 °C and at 7.0 pH in control...

Arsenic is a highly toxic and carcinogenic metalloid widely dispersed in the environment, contaminating water and soil and accumulating in crops. Paradoxically, arsenic is also part of modern therapy and employed in treating numerous ailments and diseases. Hence, inventing strategies to tune cellular arsenic uptake based on purpose is striking. Here, we describe an approach in which the arsenit...

The recently solved X-ray crystal structure of the molybdenum-containing arsenite ox idoreductase from Alcaligenes fa ecalis, is discussed, keeping in view the known mechanistic and spectroscopic information regarding the protein in a structural context. In addi tion, recent mechan istic studies of );,janthine oxidase are covered , with the conclusion that the reaction meclianism is initiated b...

Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of oxygen and can contribute to organic matter oxidation. In aquifers, ...