INDEX special

Consider a hypothetical request for an art search as it might be made to the library, and the procedures that would be followed in the prosecution of the search. Assume that Dr. John Doe has requested help in connection with research he is about to start on the Fischer-Tropsch synthesis. He first requests the art on hydrogenation. This, obviously, is a very broad field, with numerous references in all the major sources—books, monographs, general and special texts, encyclopedias, etc. indexes such as Chemical Abstracts and Engineering Index special files such as card file indexes and clipping files and patents. Table I shows how this field may be subdivided. 

Technical Book Review Index, Special Libraries Association, New York, Monthly except July,... 

The electronic polarizability is the origin of the van der Waals attractions the less the polarizability, the less the van der Waals attraction. Therefore, the fluorinated organic compounds usually have a smaller van der Waals interaction than do the nonfluorinated parent compounds. The small van der Waals attraction of a fluoroorganic compound, which can be estimated by its refractive index, specializes the physical properties regarding the inter-molecular interaction of fluoroorganics [10]. 

To identify recent, cntting-edge research information, engineers, scientists, and researchers consult journal articles, conference proceedings, and technical reports. Abstracts and indexes are tools to locate these types of docnments. Given the sheer amount of information in the engineering and scientific disciplines, abstracts and indexes specialize in their coverage and scope. 

This form of limited-conversion hydrocracking is a process that selectively prepares high quality residues for the special manufacture of base oils of high viscosity index or treating residues having low BMCl for the conversion of heavy fractions to ethylene, propylene, butadiene and aromatics. 

The reconstruction algorithm proposed in this work is based on a special choice of basis flinctions to expand the unknown refractive index profile. The following set of functions is used here ... 

The physics of X-ray refraction are analogous to the well known refraction of light by optical lenses and prisms, governed by Snell s law. The special feature is the deflection at very small angles of few minutes of arc, as the refractive index of X-rays in matter is nearly one. Due to the density differences at inner surfaces most of the incident X-rays are deflected [1]. As the scattered intensity of refraction is proportional to the specific surface of a sample, a reference standard gives a quantitative measure for analytical determinations. 

A much better way would be to use phase contrast, rather than attenuation contrast, since the phase change, due to changes in index of refraction, can be up to 1000 times larger than the change in amplitude. However, phase contrast techniques require the disposal of monochromatic X-ray sources, such as synchrotrons, combined with special optics, such as double crystal monochromatics and interferometers [2]. Recently [3] it has been shown that one can also obtain phase contrast by using a polychromatic X-ray source provided the source size and detector resolution are small enough to maintain sufficient spatial coherence. 

The systematic lUPAC nomenclature of compounds tries to characterize compounds by a unique name. The names are quite often not as compact as the trivial names, which are short and simple to memorize. In fact, the lUPAC name can be quite long and cumbersome. This is one reason why trivial names are still heavily used today. The basic aim of the lUPAC nomenclature is to describe particular parts of the structure (fi agments) in a systematic manner, with special expressions from a vocabulary of terms. Therefore, the systematic nomenclature can be, and is, used in database systems such as the Chemical Abstracts Service (see Section 5.4) as index for chemical structures. However, this notation does not directly allow the extraction of additional information about the molecule, such as bond orders or molecular weight. 

Individual compounds or groups of compounds are mentioned in this Index only if some features of their behaviour have received special mention in the text. Individual compounds are listed in the following Compound Index. The letter A indicates that a topic is referred to in the Appendix. 

Table 4 lists the specifications set by Du Pont, the largest U.S. producer of DMF (4). Water in DMF is deterrnined either by Kad Fischer titration or by gas chromatography. The chromatographic method is more rehable at lower levels of water (<500 ppm) (4). DMF purity is deterrnined by gc. For specialized laboratory appHcations, conductivity measurements have been used as an indication of purity (27). DMF in water can be measured by refractive index, hydrolysis to DMA followed by titration of the Hberated amine, or, most conveniendy, by infrared analysis. A band at 1087 cm is used for the ir analysis. 

Ionomer resins are produced in multiple grades to meet market needs, and prospective customers are provided with information on key processing parameters such as melt-flow index. Nominal values for many other properties are Hsted in product brochures. The ASTM test methods developed for general-purpose thermoplastic resins are appHcable to ionomers. No special methods have been introduced specifically for the ionomers. 

National Institute of Standards and Technology Index of US. Nuclear Standards W. I. Slattery, ed. National Bureau of Standards, Special Pub. 

Molecular Weight. PE mol wt (melt index) is usually controlled by reaction temperature or chain-transfer agents. Reaction temperature is the principal control method in polymerization processes with Phillips catalysts. On the other hand, special chemical agents for chain transfer are requited for... 

Besides the worldwide WPI database, Derwent provides on the ORBIT system the USPatents database, a bibhographic file of patent front page and cl aim information for U.S. patents since 1971. Derwent also produces a biotechnology database, GENESEQ, that indexes sequence stmetures of proteins or nucleic acids disclosed specifically or genetically in patents. This database is searchable with special sequence software on the InteUiGenetics system, and is a new addition to STN s database catalog. 

Chemical Abstracts Ninth Collective Index, Index Guide, Appendix IV F. Specialized Substances, par. 215, pp. 2021—2051 (1972—1976). In the Tenth and Eleventh Collective Indexes, the corresponding page numbers are 1921—1951 and 1931—1971, respectively. 

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