Publishing difficulty

There are numerous solubility data in the literature the standard reference is by Seidell (loc. cit.). Valuable as they are, they nevertheless must be used with caution because the solubihty of compounds is often influenced by pH and/or the presence of other soluble impurities which usually tend to depress the solubihty of the major constituents. While exact values for any system are frequently best determined by actual composition measurements, the difficulty of reproducing these solubility diagrams should not be underestimated. To obtain data which are readily reproducible, elaborate pains must be taken to be sure the system sampled is at equihbrium, and often this means holding a sample at constant temperature for a period of from 1 to 100 h. While the published cui ves may not be exac t for actual solutions of interest, they generally will be indicative of the shape of the solubility cui ve and will show the presence of hydrates or double salts. 

Detailed, critical surveys of the variants and complexities of crystal growth from the melt were published for low-melting metals by Goss (1963) and for high-melting metals (which present much greater difficulties) by Schadler (1963). 

The difficulty, of course, was that electrons cannot be focused by a glass lens, and it was necessary to use either magnetic or electrostatic Menses . A German, Hans Busch, in 1926/27 published some seminal papers on the analogy between the effect... 

With regard to the practical use of ionone, which sometimes presents a difficulty to perfumers, Schimmel Co. have published the following remarks —... 

Though he won the prize he did not win the outright acclaim of his referees. They accepted that Fourier had formulated heat flow correctly but felt that his methods were not without their difficulties. The use of the Fourier Series was still controversial. It was only when he had returned to Paris for good (around 1818) that he could get his work published in his seminal book, The Analycical Theoiy of Heat. 

Design wet bulbs can be determined from published meteorological data for the area concerned. The difficulty is deciding how to relate the annual coverage to the tower performance at any given time. 

The corrosion of steel by natural and industrial waters is a complicated and many-sided phenomenon, which cannot be dealt with completely within the narrow compass available here. The difficulty arises from the fact that, of the three main considerations involved —the composition and surface condition of the steel, the quality of the water, and the operating conditions -the last is generally the most important. Moreover, in industry the operating conditions vary widely, and many of them need individual study. Consequently, all that will be attempted here is to state a few general facts and principles. For more detailed treatment the reader is referred to the recognised textbooks such as those of Evans , Hasse and Butler and Ison. A brochure published by the Iron and Steel Institute may also prove helpful. 

In de-aerated conditions, for instance in most central heating systems, little if any attack on copper occurs . As far as drinking waters are concerned, copper is not classified as a toxic substance or hazardous to health. To avoid any difficulties due to unpalatability, the maximum continuous copper content should not exceed 10 p.p.m., with a limit of 3 p.p.m. in water after standing overnight in copper pipes. A review of the subject by Grunau makes reference to 394 published papers. 

In contrast to points (l)-(3) of discussion, the effect of ion association on the conductivity of concentrated solutions is proven only with difficulty. Previously published reviews refer mainly to the permittivity of the solvent or quote some theoretical expressions for association constants which only take permittivity and distance parameters into account. Ue and Mori [212] in a recent publication tried a multiple linear regression based Eq. (62)... 

There is a formula for business failures based on Dun Bradstreet, Inc. annually published data. The vast majority of the firms involved are small. Why do failures occur D B has offered the following tabular explanation (apparent cause/percent) inadequate sales/49.9, competitive weakness/25.3, heavy operating expenses/13.0, receivables difficul-ties/8.3, inventory difficulties/7.7, excessive fixed assets/3.2, poor location/2.7, neglect/0.8, disaster/0.8, fraud/0.5, and others/1.1. Numbers do not add up to 100% because some failures are attributed to a combination of apparent causes. One can include that product design directly influences competitive weakness and heavy operating expenses. 

Previously published methods for electrophilic bromination of isoquinoline"" lead to mixtures of isomers only separable with difficulty, use expensive additives or large excesses of reactants, or involve multistep procedures. 

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