Problem, identifying

Each plant has established methods. The following should be considered during this preparation stage. Problems identified, typically during a pretest, shoula be solved prior to the initiation of the unit test. 

Reviewing with the customer s operators and management the current waterside status and new problems identified, current treatment program progress, and future objectives... 

Thus, programs based on multiblends are relatively expensive to use compared with programs based on the use of separate products that are matched to the potential for particular problems identified in a boiler plant. Nevertheless, they remain commonplace for the smallest boiler houses, but as the organizational size of the customer and its volume of daily steam production increases, so the trend for individual chemical treatments on the site tends to predominate. Often, more sophisticated chemical feed and control arrangements are also employed. 

A great deal has been learned about the biosynthesis of nitrogenases, but at the moment the process is understood only in broad outline. The detailed roles of the individual gene products require much further investigation, which may once more indicate fresh approaches to some of the problems identified herein. In particular, if the biosynthetic steps can be emulated chemically, then it may be possible to synthesize FeMoco in large quantities in order to allow its detailed analysis at the atomic level. 

Problem Identify the factors responsible for regio-selectivity in these reactions ... 

PROBLEMS Identify the hybridization state and geometry of each atom in the following compounds. Do not worry about the geometry of atoms connected to only one other atom. For example, do not worry about the geometry of any hydrogen atoms or about the geometry of the oxygen atoms in problems 4.12,4.13,4.15, and 4.17. 

PROBLEMS Identify the hybridization state and geometry of each nitrogen atom and each oxygen atom in the following compounds. 

PROBLEMS Identify what suffix you would use in naming each of the following compounds. 

PROBLEMS Identify how you would describe the unsaturation in the name of the following compounds. 

PROBLEMS Identify which of the following compounds is a meso compound. 

PROBLEMS Identify whether each of the following snbstrates is more likely to participate in an Sn2 or SnI reaction. 

PROBLEMS Identify the function of each of the following reagents. In each case, the reagent will fall into one of the following four categories ... 

PROBLEMS Identify the mechanism(s) expected to occur in each of the following cases. Do not worry about drawing the products yet. We wiU do that in the next section. For now, just identify which mechanisms are operating ... 

PROBLEMS Identify the major and minor product(s) that are expected for each of the following reactions. 

PROBLEMS Identify what reagents you would use to carry out each of the following transformations ... 

PROBLEMS Identify the starting ketone or aldehyde you would use to prepare each of the following alcohols through reduction reactions ... 

The equilibrium concentration of hydronium ions is in the 10 M range, so this value for appears reasonable. Notice that the problem identified this solution as 0.25 M HF, but at equilibrium, [HF] = 0.24 M. Conventionally, a solution s concentration is stated as its initial concentration, even though the equilibrium concentrations may differ slightly from this initial concentration. 

Wildlife indicators can establish baseline conditions, act as early warning signals of environmental problems, identify the extent of contamination, define critical pathways and responses at multiple trophic levels, as well as integrate biological exposure with the physical and chemical environment (Farrington 1991). Indicator selection is based on a combination of criteria or characteristics that include (Jenkins 1981) ... 

If a well has not been drilled, a nearby well may be an indicator of potential radon problems. Identifying potential radon-in-water problems by using the results from adjacent wells is subject to the same problems that were mentioned earlier. There is no guarantee that the neighbor s well is producing water with the same characteristics as the new well will produce since it may not be from the same stratum. The limited data available on houses with radon-in-water problems indicate that adjacent houses with similar wells sometimes produce similar radon-in-water problems and sometimes do not. However, few isolated radon-in-water problem houses have been observed. 

ER E, the S T organization of the World largest oil company, ExxonMobil, was not very prolific in R D activities related to biocatalytic refining, but was focused on addressing a few key problems identified in BDS. They began in early 1990, with works on gas treatment however, the developments took an oil twist towards the end of the decade when they became involved with heavier hydrocarbon feedstocks. This company possesses inventions, which are protected with six patents ... 

There must be systems in place to monitor the study while it is in progress and to check that all systems are working in accordance with GLP requirements, to record any problems identified and to ensure that remedial action is taken. The person responsible for these quality assurance procedures must be independent of the study being audited. In large organizations, there may be a separate Quality Assurance unit but this will not be practical in smaller organizations. 

Problems related to the occurrence of hydrogen sulfide have been intensively reported in the literature (cf. this chapter and Section 6.2.6). Although a great number of factors affect the relation between the occurrence and the problems identified, Table 4.6 can be considered a relevant approach. The table gives a simplified estimate, and indication of medium problems must not be considered equivalent to no need for control. ... 

The PGM carriers in this ore include a variety of PGM minerals (sperrilite) and its alloys. The main problems identified associated with processing this ore type were (a) poor concentrate grade, (b) low rate of PGM flotation, (c) excessive chromium reporting to the PGM concentrate and (d) high collector consumption. 

In this concluding Chapter the problems identified from practice and literature and the research questions derived from these observations will be reviewed. Subsequently, the results from the previous Chapters will be used to obtain the answers to these research questions. Moreover, a reflection on the results and answers will be stated. Finally, some opportunities for future research will be presented. 

Directing effort at problems identified through specific TSCA mechanisms... 

One problem identified at the outset was that MPEG or a monosaccharide DOX-MPEG as acceptors had to be presented to a glucosidase in a concentration, which renders the solution quite viscous at 37°C, and consequently the reaction becomes very slow.47 Below this acceptor concentration threshold, reaction yields were very low. Enzymes from thermophilic bacteria working at higher temperatures... 

The tests on DPE suit material and wood addressed size-reduction and material-transport problems identified during the Demo I testing (NRC, 2000a). DPE suit and butyl rubber simulant materials were shredded in a dedicated granulator, cryogenically cooled in a cryo-cooler with an internal screw conveyor, and reduced in a cryocooled hammer mill. No materials contaminated with agent were tested. 

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