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Enzyme-Based Vinyl Polymerization 总被引:2,自引:0,他引:2
In vitro enzyme-mediated polymerization of vinyl monomers is reviewed. Oxidoreductase enzymes have been used for the polymerization of styrene, derivatives of styrene, acrylates, and acrylamide in water and water-miscible co-solvents. Kinetic and mechanistic studies revealed that a ternary system (horseradish peroxidase, H2O2, initiator, or -diketone) is required for efficient polymerization and the initiator controls the polymer characteristics. 相似文献
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Edward Kaplan Barbara Royce Martin H. Garrell E. Frederick Riedel Jayant Sathaye George J. Rotariu 《Environmental geochemistry and health》1984,6(2):54-65
The objective of this assessment is to quantify some of the environmental effects of a significant increase in United States oil production by tertiary or enhanced oil recovery (EOR) methods. The problems associated with each EOR technology are discussed and controls and regulations are briefly summarised. A tertiary oil production scenario for the United States was developed focussing only on mainland fields in the lower 48 states. It included all of the EOR methods expected to be in use during the next two decades. The environmental impacts, including water requirements, air emissions and generation of solid wastes, are then scaled to this scenario. The effects of control technologies and state regulations are considered. A comparison is also made between the impacts of EOR as an energy source and impacts associated with coal and synthetic fuels which concludes that EOR is preferable in many respects. There are environmental risks associated with EOR technologies, specific projects and specific fields in the production scenario; however, most problems are solvable by responsible regulation, enforcement of regulations and application of the best professional engineering by project operators. 相似文献
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Simulating the response of metal contaminated lakes to reductions in atmospheric loading using a modified QWASI model 总被引:3,自引:0,他引:3
The changes in metal concentration following significant reductions in atmospheric metal loading of two nickel and copper contaminated lakes in Coniston Valley of the Sudbury Basin of Ontario, Canada were simulated by using steady-state and dynamic versions of a modified Quantitative Water Air Sediment Interaction (QWASI) Model. Metal partitioning and precipitation processes were quantified with the aid of US EPA's MINTEQA2 Model. The dynamic model successfully described the recovery of the two lakes and identified key input, loss and partitioning processes. A useful modelling strategy is to develop one or more steady-state models that give an approximate representation of conditions at defined times, then extend this to a dynamic version which can take into account the differing rates of response of components of the system. This modelling strategy can be used for designing and assessing remediation programs for metal contaminated lakes and watersheds. 相似文献
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Can Hatice Kaplan Kavlak Serap Gurbuz Fatma Odabaşı Mehmet 《Journal of Polymers and the Environment》2022,30(7):3055-3062
Journal of Polymers and the Environment - Extracellular polymeric substances (EPSs) can be defined as renewable, high molecular weight polymeric materials produced by bacteria and microorganisms.... 相似文献
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Bölük Gülden Kaplan Ramazan 《Environmental science and pollution research international》2022,29(18):26613-26630
Environmental Science and Pollution Research - We aim at analyzing the influence of incentive policies on renewable energy deployment in European Union countries and Turkey over the 2000–2018... 相似文献