Algogenic organic matter produced by the excess growth of cyanobacteria in semi-closed water areas causes coagulation inhibition in drinking water production. In this study, hydrophilic substances of Microcystis aeruginosa, which were mainly composed of lipopolysaccharide (LPS) and RNA, were prepared, and the involvement of these cyanobacterial hydrophilic substances in coagulation inhibition w...

The function of a Medical Review Officer (MRO) to review, interpret, and recommend action on the results of workplace drug testing, is critical. The person executing this function must be trained in medicine, be well-versed in laboratory testing processes and interpretation of laboratory results, and be knowledgeable about: (1) the spectrum of organic diseases which require treatment by control...

Closure of paper mills implies recirculation and reuse of process water. However, increased internal recycling leads to accumulation of soluble organic substances and salts. The build-up of organic matter in the system may cause a number of serious problems, for example, microbial growth within the papermaking process. Biological in-mill treatment of whitewater is a potentially efficient and co...

we evaluated the efficacy of a full-scale combined biophysicochemical system for treatingmolasses-based bioethanol wastewater in terms of organic substances, nutrient, and dark brown color removal. the main organic removal unit, i.e., the upflow anaerobic sludge blanket (uasb) reactor, achieved 80.7% removal and 4.3 nm3 methane production per cubic meter of wastewater with a hydraulic retention...

More than thirty million inorganic and organic substances are registered by the Chemical Abstract Service (CAS). About 600,000 are commonly used in industry and several thousand new molecules are created each year as the result of research. More than 25,000 irritant and corrosive chemicals have been identified as having the potential to cause burns. In Europe, 104,031 commercial chemical substa...

Humic substances and other dissolved organic matter (DOM) in Lake Biwa and the surrounding rivers were investigated to elucidate their origins and behavior. An annual increase in chemical oxygen demand (COD) has been observed in the northern basin of Lake Biwa since 1985. The concentrations of dissolved organic carbon (DOC) in the northern and southern basins of Lake Biwa were 1.7-2.4 mgC/l and...