Results 241 to 250 of about 1,084,483 (265)

Tetracycline degradation by ozonation, and evaluation of biodegradability and toxicity of ozonation byproducts

Journal of Environmental Engineering and Science, 2013
Tetracycline was exposed to ozone by bubbling at different pH levels, and the acute toxicity of ozonation byproducts was tested by luminescent bacteria (Vibrio qinghaiensis sp.-Q67). Residual tetracycline in the solutions was detected by high performance liquid chromatography (HPLC).
Jiguo Wu, Yunxia Jiang, Longying Zha, Zhuoming Ye, Zhifeng Zhou, Jufeng Ye, Hongwei Zhou   +6 more
openaire   +1 more source

Variation in ruminal degradation and intestinal digestion of animal byproduct proteins

Animal Feed Science and Technology, 1996
Abstract In situ and in vitro procedures were used to determine ruminal degradation and intestinal digestion of crude protein (CP) from animal byproducts. Seven samples of meat and bone meal (MBM), hydrolyzed feather meal (HFM), ring dried blood meal (RBM), and batch dried blood meal (BBM) were obtained from various rendering and meat packing plants.
S.A. Howie, S. Calsamiglia, M.D. Stern
openaire   +1 more source

In vitro and in situ nutrient degradability of barley and wheat milling byproducts

Canadian Journal of Animal Science, 1998
A study was conducted to estimate nutrient degradability of barley milling byproducts (BMBP) using in vitro and in situ techniques. Three levels of milling (5.9, 9.5 and 17%), representing the proportion of byproduct to the original grain weight were tested. A wheat byproduct (WMBP), milled at 5.9% was used for comparison.
A. F. Mustafa, J. J. McKinnon, D. A. Christensen   +2 more
openaire   +1 more source

SrSnO3/g-C3N4 and sunlight: Photocatalytic activity and toxicity of degradation byproducts

Journal of Environmental Chemical Engineering, 2020
Abstract The presence of organic pollutants in the environment, especially in water, is recognized as a continuing threat to environmental stability. Therefore, the development of new materials for the removal of organic pollutants in water are of fundamental importance.
Idio Alves de Sousa Filho, Laura Ruiz Arana, Giscard Doungmo, Cesar Koppe Grisolia, Huayna Terrashke, Ingrid Távora Weber   +5 more
openaire   +1 more source

Chlorination of enoxacin (ENO) in the drinking water distribution system: Degradation, byproducts, and toxicity

Science of The Total Environment, 2019
Chlorine is widely used as a drinking water disinfectant to ensure water security. However, the transformation mechanisms of its degradation of emerging pollutants within the water distribution system (WDS) is insufficiently understood. Thus, the kinetics, degradation byproducts, and toxicity of the chlorination of enoxacin (ENO, a type of emerging ...
Tuqiao, Zhang, Guilin, He, Feilong, Dong, Qingzhou, Zhang, Yuan, Huang   +4 more
openaire   +2 more sources

Photolytic degradation of ciprofloxacin in solid and aqueous environments: kinetics, phototransformation pathways, and byproducts

Environmental Science and Pollution Research, 2017
Many lipophilic pharmaceuticals may be sorbed in solid phases, leading to different photochemical behaviors. This study investigated the photochemistry of ciprofloxacin in a solid-phase system and compared it to that in a water-phase system. Kaolinite was used as the model solid matrix.
Yen-Ching, Lin, Kuan-Wen, Hsiao, Angela Yu-Chen, Lin   +2 more
openaire   +2 more sources

A metabolic model for thiodiglycol degradation: capacity constraint leads to byproduct accumulation

Bioprocess and Biosystems Engineering, 2001
A metabolic model was developed to describe the degradation of thiodiglycol (TDG) by Alcaligenes xylosoxydans ssp. xylosoxydans (SH91). Experimental evidence has suggested there is a metabolic capacity constraint that limits the specific thiodiglycol utilization rate, leads to metabolic byproducts, and ultimately inhibits the overall degradation ...
Lee T.-S., Chan S.-H., Weigand W., Bentley W.   +3 more
openaire   +1 more source

Rationalizing the mechanism of HMDS degradation in air and effective control of the reaction byproducts

SPIE Proceedings, 2008
The concern over molecular contamination on the surfaces of optics continues to grow. Most recently, this concern has focused on siloxane contamination resulting from hexamethyldisilazane (HMDS) which is commonly used as a wafer treatment to improve photoresist adhesion onto wafers.
Kevin Seguin, Andrew J. Dallas, Gerald Weineck   +2 more
openaire   +1 more source

Kinetic model for the radical degradation of tri-halonitromethane disinfection byproducts in water

Radiation Physics and Chemistry, 2012
Abstract The halonitromethanes (HNMs) are byproducts of the ozonation and chlorine/chloramine treatment of drinking waters. Although typically occurring at low concentrations HNMs have high cytotoxicity and mutagenicity, and may therefore represent a significant human health hazard. In this study, we have investigated the radical based mineralization
Stephen P. Mezyk, Bruce J. Mincher, William J. Cooper, S. Kirkham Cole, Robert V. Fox, Piero R. Gardinali   +5 more
openaire   +1 more source

Kinetics and byproduct formation of benzoic acid degradation by the UV/chlorine process

2014
The kinetics of degradation of benzoic acid in the UV/chlorine process was investigatedin this research study. The UV/chlorine process has been recently considered as an efficient and energy-saving advanced oxidation process to generate hydroxyl radicals (HO•) to degrade emerging micropollutants.
openaire   +2 more sources