The Green Advantage

Defense Fund and developed a high-profile recycling program. 

This public relations coup has polished McDonald s image and distinguished itself from other fast-food competitors. In contrast, its competitor, Burger King Corporation, has been boycotted by environmental groups for its importing of beef from cleared rain forests. 

In the competitive race to become green, many companies are forming alliances and collaborating with enviroirmentalists to establish environmental goals and objectives. One such example was the promulgation of the Valdez Principles. Following the Exxon oil release in Valdez, Alaska, a 

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The green advantages of the direct oxidation process can be summarized as follows ... 

What is the green advantage of nsing atom economy instead of percent yield as a measure of reaction snccess ... 

In comparison with the more standard Configuration Interaction (Cl) method, the one-particle Green s function approach offers the essential advantages, in the outlook of numerical applications on extended systems, of a stronger and systematic compactness (30) of the configuration spaces in high order approximations and of energy separability (5,31) in the dissociation limit (size-consistency). The latter is a necessary prerequisite ( ) for a correct (i.e. size-... 

Therefore, it might be possible to formulate a compound which both conducts and has all the other advantages of the green tire by the incorporation of relatively small amounts of carbon nanotubes into the silica-filled compound. 

Synthesis of metal carbonyl clusters on oxide surfaces (followed by extraction into a solvent and workup) is occasionally a more convenient and efficient method for preparation of a metal carbonyl cluster than conventional solution chemistry. This synthetic strategy offers the green chemistry advantage of minimizing solvent use, as the reaction often occurs in the absence of solvent. 

The word potential was first introduced in 1828 by G. Green (1793-1841), but before that it was called the force function. The main advantage of introduction of the potential function is the fact that instead of three components of the force, which usually have different analytical expressions, it is possible to find and then investigate only one function U. Besides, in order to obtain the level surface it is sufficient to make a potential equal to some constant ... 

The advantages to using MSDSs for chemical inventories are that MSDSs are publicly available and required by law. There is no extra cost or labour needed to supply them. The limitations to using MSDSs as a source of inventory data are that currently, in the United States, a standardized reporting format is not mandatory. MSDSs are not verified or audited and MSDS information can be incomplete and/or inaccurate. In addition, OSHA s definition of hazard does not include the broader scope of hazard used in green chemistry. Therefore, chemicals that are potential hazards from the green chemistry perspective but are not defined by OSHA as hazards, are not required to be identified on a MSDS. 

We applied the Liouville-von Neumann (LvN) method, a canonical method, to nonequilibrium quantum phase transitions. The essential idea of the LvN method is first to solve the LvN equation and then to find exact wave functionals of time-dependent quantum systems. The LvN method has several advantages that it can easily incorporate thermal theory in terms of density operators and that it can also be extended to thermofield dynamics (TFD) by using the time-dependent creation and annihilation operators, invariant operators. Combined with the oscillator representation, the LvN method provides the Fock space of a Hartree-Fock type quadratic part of the Hamiltonian, and further allows to improve wave functionals systematically either by the Green function or perturbation technique. In this sense the LvN method goes beyond the Hartree-Fock approximation. 

In conclusion, we reiterate that photoinitiated reactions have a dramatic advantage with respect to thermal reactions, since light is the green reagent par excellence. If we consider the possibihty that such reactions will be apphed in the foreseeable future, and in particular whether they will contribute to the development of green chemistry, we can conclude that there are both indisputable advantages and difficult to solve problems. 

The green chemistry advantages of using triflates are not only that it helps avoid the use of hazardous catalysts, but also that the triflates themselves can be recovered and reused rather easily. In one series of reactions involving the reaction between phenethyl alcohol and acetic acid, for example, Barrett s team found that yields of 95-98 percent were possible, with catalyst recovery amounting to no less than 98 percent and, in most cases, nearly 100 percent. The team concluded one of their reports on the use of triflate catalysts by suggesting that the catalysts they used were "readily recyclable and we believe this to be a major step forward in the area of clean technology for aromatic nitration (Francis J. Waller, et ah, "Lanthanide(III)... 

The performance of organic reactions in organized media, e.g. by zeolite confinement, and the use of zeolites as selective and green catalysts for organic transformations, have been popularized in recent years. The main advantage of the zeolites to be tested as media or catalysts for carrying out organic reactions is the so-called shape selectivity . ... 

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