Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Problems worthy

From here we establish a set of objectives and try to make them dynamic. A dynamic objective says what is to be done by when. These can be classified as standard objectives, problem-solving and innovative. In market development the innovative objective is always the most challenging and difficult to achieve. These are the problems. — In a book called Grooks, Piet Hein wrote— Problems worthy of attack prove their worth by hitting back, (l). [Pg.88]

Only data for substituents of the requisite symmetry are included in Fig. 19. These results adhere to the correlation with excellent precision. This observation confirms the general utility of the procedure. One caution is necessary. The p-value determined for non-catalytic bromina-tion of the monosubstituted compounds is — 12.1. The reaction parameter is decreased to — 8.7 for the bromination process with the polymethylbenzenes. The large variation in substituent effects is presumably the consequence of the greater overall reactivity of the alkylated benzenes. The dependence of p on the nature of the substrate is an important problem worthy of further attention. [Pg.98]

Problems worthy of attack, prove their worth by fighting back. [Pg.363]

The initial research effort may prove to be a broad spectmm of apphcations or solutions to the original problem that in turn provide any number of inventions. When efforts move toward reducing the invention to practice and refining the invention so that it proves to be commercially marketable, certain apphcations may prove to be unfeasible or commercially impractical. As a result, only one apphcation, eg, the creation of a given pattern on the surface of the automobile tire, may ultimately prove commercially marketable. However, ah the solutions which are developed and considered over the research and development process may comprise inventions that are worthy of disclosure and claiming in a patent. An apphcation which is not commercially viable today may become viable within the seventeen-year lifetime of a patent. [Pg.30]

Pitting corrosion always remains a worthy subject for study, particularly with reference to mechanism, and the problem conveniently divides into aspects of initiation and growth. For 6061 alloy in synthetic seawater, given sufficient time, pit initiation and growth will occur at potentials at or slightly above the repassivition potential . In an electrochemical study, it was found that chloride ions attack the passive layer as a chemical reaction partner so that the initiation process becomes one of cooperative chemical and electrochemical effects . [Pg.676]

Initial Situation A product contains three active components that up to a certain point in time were identified using TLC. Quantitation was done by means of extraction/photometry. Trials to circumvent the time-consuming extraction steps by quantitative TLC (diffuse reflection mode) had been started but were discontinued due to reproducibility problems. The following options were deemed worthy of consideration ... [Pg.180]

The problem of and importance of MIC was not fully realized until recently. Even in the mid-1980s the statement was made that The major problem encountered by the petroleum microbiologist working in the North Sea oil fields is that of convincing the oil field engineer that bacterial corrosion is a subject worthy of serious attention. ... [Pg.76]

The third type of methods treats time in an exact manner by allowing it to vary in search of a true optimum. Worthy of mention at this stage is that none of the graphical techniques bears this crucial capability in batch chemical plants. Ultimately, mainly mathematical techniques are used in order to treat time exactly. This assertion is further justified later in this textbook when graphical techniques are compared to mathematical techniques using a typical problem. [Pg.9]

It is worthy of note that the problem solution is such that in each time subinterval, the concentration constraints is met. This implies that, as long as water is available at the right time, it can safely be reused in any of the time subintervals within the concentration interval, i.e. the secondary constraints (concentration) is met in every step of the analysis, and the primary constraints (time) guides the formulation of the final solution (target design network). [Pg.256]

The residue can be minimized using bilayer schemes and sensitivity can be increased by either using poly(vinyl biphenyl) derivatives that are more absorbing at 248 nm or by adding anthracene derivatives to chlorinated poly(styrene) polymer. The present formulations are not production worthy because of this residue and we are currently working on approaches that may eliminate this problem. [Pg.205]

Current biodiesel can not be considered as a 100% biomass-based fuel as long as methanol is derived from petrochemical resources. A clean way to solve the biorelated problem is the conversion of glycerol waste from the transesterification process into syngas. In this context, glycerol reforming is a suitable target reaction worthy of study. [Pg.249]

Before discussing the broader aspects of nutrition and the possibility of its application to the solution of some of the problems that arise because of biochemical individuality, we will consider, in sequence, several nutritional items for which the evidence of interindividual differences seems particularly worthy of attention. Rather than attempt the discussion of every known nutritional item from this standpoint, we will exercise some selection. The omission of a particular item from our discussion, however, should not carry the implication that inter-individual differences with respect to this item do not exist. [Pg.179]


See other pages where Problems worthy is mentioned: [Pg.34]    [Pg.1307]    [Pg.63]    [Pg.177]    [Pg.35]    [Pg.96]    [Pg.2738]    [Pg.319]    [Pg.635]    [Pg.1136]    [Pg.1340]    [Pg.255]    [Pg.34]    [Pg.1307]    [Pg.63]    [Pg.177]    [Pg.35]    [Pg.96]    [Pg.2738]    [Pg.319]    [Pg.635]    [Pg.1136]    [Pg.1340]    [Pg.255]    [Pg.238]    [Pg.2438]    [Pg.294]    [Pg.53]    [Pg.52]    [Pg.606]    [Pg.106]    [Pg.139]    [Pg.199]    [Pg.299]    [Pg.84]    [Pg.87]    [Pg.153]    [Pg.260]    [Pg.243]    [Pg.246]    [Pg.315]    [Pg.52]    [Pg.41]    [Pg.241]    [Pg.145]    [Pg.208]    [Pg.19]    [Pg.437]    [Pg.84]    [Pg.222]    [Pg.346]   
See also in sourсe #XX -- [ Pg.219 ]




SEARCH



© 2024 chempedia.info