نتایج جستجو برای: environmentally friendly catalyst
تعداد نتایج: 98892 فیلتر نتایج به سال:
We discuss an environmentally friendly renormalization group approach to analyze phase transitions. We intend to apply this method to the Electroweak Phase Transition. This work is in progress. We present some previously obtained results concerning a λφ 4 theory, where the main features of this algorithm are introduced.
In 1995, Praxair Surface Technologies, Inc., and Surface Solutions, Inc., partnered to develop, test, and evaluate a promising, but experimental, coating technology invented by Surface Solutions. Early work with Surface Solutions' linear magnetron sputtering (LMS) process indicated that it had the potential to apply uniform, high-quality ceramic coatings to the internal surfaces of steel cylind...
This paper identifies which information about tourists serves as the best predictor of their pro-environmental behavior at home and on vacation. If a small set of predictors can be identified, the tourism industry would be able to use them to focus attention on attracting tourists with smaller environmental footprints. Results from a survey asking respondents about pro-environmental behavior in...
SnCl4/nano-sawdust was prepared as a carbohydrate-based catalyst containing of tin bearing cellulose units. The catalyst was characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDS). The catalyst was applied successfully as a readily available, inexpensive, biodeg...
In 1994, Darryl Diefes, DDS, a Whiteville, NC, dentist was troubled. The local newspaper reported on dangerous mercury levels in fish in nearby Lake Waccamaw, a popular fishing spot. Dr. Diefes began to worry about the source of the mercury. “I knew I handled a lot of mercury in my office and I wanted to know if I was somehow contributing to the problem,” Dr. Diefes explains. That report marked...
Primary explosives are used in small quantities to generate a detonation wave when subjected to a flame, heat, impact, electric spark, or friction. Detonation of the primary explosive initiates the secondary booster or main-charge explosive or propellant. Long-term use of lead azide and lead styphnate as primary explosives has resulted in lead contamination at artillery and firing ranges and be...
Membrane separation systems require no or very little chemicals compared to standard unit operations. They are also easy to scale up, energy efficient, and already widely used in various gas and liquid separation processes. Different types of membranes such as common polymers, microporous organic polymers, fixed-site-carrier membranes, mixed matrix membranes, carbon membranes as well as inorgan...
in this study, the synthesis of 4 h -chromenes of biological activity via a multicomponent reaction of dimedone, aromatic aldehydes and malononitrile catalyzed by glutamic acid as a catalyst was investigated. the structural features of the synthesized compounds were characterized by melting point, ir and 1 h nmr analysis. the catalyst being reported here is cheap, safe to handle and the whole p...
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