Case study site selection

CASE STUDY SITE SELECTION FOR A 150,000,000 IJi/YR POLYSTYRENE PLANT USING THE SUSPENSION PROCESS... 

In this Section the concepts of a precursor, control process and safety, will be applied to a practical case. From this case study, further refinements and a structured way of approaching practice will be derived. To find a suitable case study, the selection criteria and their underlying rationalisations have to be given. In Chapter 2, Bickman (Bickman et al., 1998) stated that selection criteria should be based upon five major issues site selection, data collection process, authorization, accessibility and other support. These five issues, the selection criteria and their advantages and disadvantages are stated below ... 

Lima, A. (2008). Evaluation of geochemical background at regional and local scales by fractal filtering technique Case studies in selected Italian areas. In Environmental geochemistry Site characterization, Data analysis, Case histories (B. De Vivo, H. E. Belkin, and A. Lima, eds.). Elsevier (this volume). 

Whatever the case, the ability to irrigate test plots is an important consideration during field site selection. Sprinkler irrigation is preferred. Flood and furrow irrigation should be avoided since they may disturb surface residues, resulting in uneven residue distribution and/or inadvertent agrochemical loss from the study plots. Recommended irrigation practices are discussed in more detail in Section 3.3.8. 

Soil properties A Soil texture (sand, silt, clay), organic matter/carbon content, and pH Stones, roots, and hardpans must be largely absent to allow representative sampling of soil profile Soil properties should appear uniform over test site Soil texture data should be available at time of site selection. Soil properties must match study purpose. This can be realistic use conditions, realistic worst-case or worst-case in terms of agrochemical mobility and persistence Must ensure that the majority of samples can be taken from the deepest sampling horizon. Information about sub-soils can be obtained from soil maps, test coring and on-site interviews... 

This chapter presents a regulatory overview of on-site remediation, remedial investigations (RI), feasibility studies (FS), remedial technologies, and a simulated case study. The discussion of remedial investigations and feasibility studies also includes the development and selection of remedial technologies. The case study outlines a remedial investigation and feasibility study, as well as the selection of remedial technologies. 

However, the active site is only a conceptual tool and the assignment of the active-site atoms is more or less arbitrary. It is not possible to know beforehand which residues and protein interactions that will turn out to be important for the studied reaction. Hybrid QM/MM methods have been used to extend the active site only models by incorporating larger parts of the protein matrix in studies of enzymatic reactions [19-22], The problem to select active-site residues appears both for active-site and QM/MM models, but in the latter, explicit effects of the surrounding protein (i.e. atoms outside the active-site selection) can at least be approximately evaluated. As this and several other contributions in this volume show, this is in many cases highly desirable. 

However, in some cases the reaction coordinate actually extends from the initial active-site selection into the protein, and the same-configuration solution is not adequate. One example appears in the study of Methylmalonyl-CoA mutase described below. Another drawback of a static optimization scheme is that it... 

Like the case study discussed in Chapter 5, the case studies that will be selected in this Chapter are also based upon selection criteria based upon the five major issues as stated by Bickman (Bickman et al., 1998) site selection, authorization, data collection process, accessibility, and other support. Moreover, the cases will be chosen in such a way that all cases can be approached in a similar way, increasing the extent in which the quality of the protocol can be judged, as discussed in Chapter 2. 

Chernotsky HI (1983) Selecting U.S. Sites A Case Study of German and Japanese Firms. Management International Review 23 45-55... 

Non-metallic rare-earth compounds studied under high pressure. In almost all cases the energy level shifts as a function of pressure have been determined. The second column gives details concerning the measurements and evaluations made. In particular the following abbreviations are used L Luminescence-, A Absorption-, E Excitation-, S Site-selective spectroscopy, O Other methods, EPC Electron-Phonon Coupling, Int Intensities, LT Lifetime, CFP Crystal-Field Parameters, FIP Free-Ion Parameters, IP Intrinsic Parameters, ET Energy Transfer... 

A Case Study in the Application of Environmental Chemodynamic Principles for the Selection of a Remediation Scheme at a Louisiana Superfund Site... 

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