Volatile organic chemicals present at Superfund sites preferentially partition into the soil gas and may be available for microbial degradation. A simple mass transfer model for biodegradation for volatile substrates has been developed for the aerobic decomposition of aromatic and aliphatic hydrocarbons. The mass transfer analysis calculates diffusive fluxes from soil gas through water and memb...

High pressure non-thermal plasma decomposition performance for low density, typically 250 ppm, volatile organic compounds (VOCs), mostly trichloroethylene, in synthesized air was examined for various conditions. In order to improve the VOCs decomposition energy efficiency of the plasma reactor, new manganese-dioxide supported alumina spheres were examined, where that catalyst works well to deco...

Fully sulfonated poly(styrenesulfonate) brushes were grown from the surface of colloidal silica particles and used to prepare stable trichloroethylene-in-water and heptane-in-water Pickering emulsions. These particles were highly charged and colloidally stable in water but could not be dispersed in trichloroethylene or heptane. Both two-phase (emulsion plus neat water) and three-phase (emulsion...

Ground-water contamination by chlorinated aliphatic compounds is a major cause for concern because of their toxicity. This study examined the biodegradation of trichloroethylene and aromatic compounds by microbial consortia enriched from contaminated subsurface sediments. The consortia were capable of utilizing methane and propane as sources of carbon and energy. Two continuously recycled expan...

Several methods are known for the detection of traces of solvents in oil or paraffin. A gravimetric method (3) and a rapid colorimetrie method for the determination of residual solvents (4) are not sensitive enough. The same is true for the method developed by Eisdorf er &,Mehlenbacher (5) for the detenninatipn of trichloroethylene in plant oils after extraction with xylene. Rather sensitive de...

Recent experimental evidence indicates that structural analogs of vinyl chloride namely, vinylidene chloride and trichloroethylene, are mutagenic. Carcinogenic response also has been observed in experimental animals following exposure to vinylidene chloride, trichloroethylene, and perchloroethylene. More recent observations demonstrate low-level vinyl chloride-induced mammary carcinoma. An addi...

3) 臨床経過 主訴:腹部膨満感,便通異常,粘液便. 既往歴:約30年間,心療内科に通院し抗精神病薬な どを服用している.その他に既往症はない. 現病歴:銅管の脱脂洗浄のため,2011年4月よりト リクロロエチレンを使用し始めたが,その2年半後の 2013年秋に便秘気味になり,その後,腹部膨満感があ り,ガスがよく出てトイレが近くなり,粘液も出るよう になった.同年12月に来院したため,腹部CT検査およ び超音波検査を実施した.その後も症状が続き,2014 年5月に来院したため,大腸内視鏡検査を実施した. 腹部CT検査:2013年12月の腹部CT検査では,上行 結腸に複数の憩室が認められた. 超音波検査:2013年12月の超音波検査では,強い腸 管内ガスエコーが認められた. 大腸内視鏡検査:2014年5月の大腸内視鏡検査では, 回盲部,上行結腸,S状結腸,上部直腸において多数の 粘膜...