Refined paper

J. G. Sikonia, B. R. Shah, and M. A. Ulowet2, "Technical and Economic Assessment of Petroleum, Heavy OH, Shale Oil and Coal Liquid Refining," paper presented at Sjnfuels 3rd Worldwide Symposium, Washington, D.C., Nov. 1—3,1983. 

Energy source Chemicals Petroleum refining Paper Primary metals Other... 

Occasionally, portions of the known sequence of a protein are never found in the electron-density maps, presumably because the region is highly disordered or in motion, and thus invisible on the time scale of crystallography. It is not at all uncommon for residues at termini, especially the N terminus, to be missing from a model. Discussions of these structure-specific problems are included in a thorough refinement paper, as well as in PDB header information. 

Refinement papers should also mention any evidence that the protein is affected by crystallization. Packing effects may be evident in the model itself. For example, packing may induce slight differences between what are otherwise... 

Theoretical studies in photophysics tend to be diverse and no particular themes are evident at the present time. A somewhat refined paper deals with radiation-molecule interactions from the viewpoint of quantum electrodynamics and a more conventional... 

Lumiainen, J.L. (1997) Comparison of the mode of operations between conical and disc refiners Paper Technology, 38 (2), 53-58... 

Industrial Papers. The industrial papers comprise one of the largest uses of paper products worldwide. Industrial papers are not subject to the refining, bleaching, and other finishing treatments required for finer papers. Instead, some industrial grade papers may actually contain small wood fibers among the cellulose. This class of papers is normally used for packaging material and utility applications that do not call for a more refined paper. 

Chemicals and allied products Miscellaneous business services Food and kindred products Petroleum refining Paper and allied products Other private industry Total... 

Biedermann, J.M., J.-P. Peries and J. Bousquet (1987), SOLVAHL an attractive way to provide conversion units with high quality feedstocks . National Petroleum Refiners Association (NPRA) paper No. AM-87-41, Annual meeting, San Antonio, TX. 

Semiempirical molecular orbital calculations have gone through many stages of refinement and elaboration since Pople s 1965 papers on CNDO. Programs like PM3, which is widely used in contemporary research, are the cumulative achievement of numerous authors including Michael Dewar (1977), Walter Thiel (1998), James Stewart (1990), and their coworkers. 

Separation of Fatty Acids. Tall oil is a by-product of the pulp and paper manufacturiag process and contains a spectmm of fatty acids, such as palmitic, stearic, oleic, and linoleic acids, and rosia acids, such as abietic acid. The conventional refining process to recover these fatty acids iavolves iatensive distillation under vacuum. This process does not yield high purity fatty acids, and moreover, a significant degradation of fatty acids occurs because of the high process temperatures. These fatty and rosia acids can be separated usiag a UOP Sorbex process (93—99) (Tables 8 and 9). 

D. B. Broughton and R. C. Berg, National Petroleum Refiners Association 1969 Annual Meeting, Mar. 23,1969, technical paper AM-69-38. 

D. B. Broughton and L. C. Hardison, "Hydrocarbon-Type Separation by Unisorb," Paper presented at the 27th Midyear Meeting of the American Petroleum Institute, Division of Refining, San Erancisco, Calif., May 15, 1962. 

W. A. Rains, paper presented at 1982Annual Meeting National Petroleum Refiners Association, San Antonio, Tex., Mar. 21—23,1983. 

W. C. Healy, Jr., C. W. Maassen, and R. T. Peterson, A New Approach to Blending Octanes, paper presented at 24th Mid-year Meeting of the American Petroleum Institute s Division of Refining, New York, May 27, 1959. 

S. E. Housh and V. Petrovich, "Magnesium Refining A Fluxless Alternative," Society of Automotive Engineers Internationa/ Congress and Exposition Paper 920071, Detroit, Mich., 1992. 

The disk refiner, a newer development used for fine paper grades, includes one or two rotary disks and two or four working surfaces. The surfaces are pressed together uniformly by hydraulic pressure and guided by high precision, heavy-duty bearing systems. Stock usuaUy is fed through the center of one plate and leaves between the plates at their circumferences. 

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