Analytical Methods in Wood Chemistry, Pulping, and PapermakingEero Sjöström, Raimo Alen Springer Science & Business Media, 9 mar 2013 - 318 pagine In its broadest sense, and according to the traditional conception, wood chemistry is a comprehensive discipline, ranging from fundamental studies to practical applications. The manifold constituents, located in different morphological regions in the wood, results in an extreme complexity of wood chemistry. Ever more sophisticated endeavors needing fundamental studies and advanced analytical methods are necessary in order to delve deeper into various problems in pulping and papermaking. Gradually, new, improved ana lytical methods, originally developed for research purposes, are currently replacing many of the old "routine" methods in practical applications. Because of the expanse of the subject, an attempt to write a book of this size about analytical methods seems, perhaps, too ambitious. Of course, a whole book series of several volumes would be necessary to cover this topic completely. However, there is undoubtedly a need for a more condensed presentation which does not go into experimental details, but is limited to the basic principles of the analytical methods and illustrates their applica tions. The emphasis is on more advanced and potential methods, and partic ularly on those based on different types of spectroscopy and chromatography. |
Dall'interno del libro
Pagina 3
... units are necessary prestages, which often causes great problems or even overwhelming obstacles. Typical values showing the chemical composition of common pulpwood species have been summarized in Table 1.1 (softwood) and Table 1.2 ...
... units are necessary prestages, which often causes great problems or even overwhelming obstacles. Typical values showing the chemical composition of common pulpwood species have been summarized in Table 1.1 (softwood) and Table 1.2 ...
Pagina 4
... units (in 4C, conformation) joined together with glycosidic bonds (Fig. 1.1). Because of the strong tendency for intra- and intermolecular hydrogen bonding, bundles of cellulose molecules aggregate to microfibrils, which form either ...
... units (in 4C, conformation) joined together with glycosidic bonds (Fig. 1.1). Because of the strong tendency for intra- and intermolecular hydrogen bonding, bundles of cellulose molecules aggregate to microfibrils, which form either ...
Pagina 5
... units with equatorially oriented hydroxyl and hydroxymethyl groups able. However, a direct nitration of wood yields undegraded cellulose trinitrate, which is soluble in organic solvents. Determination of its weight-average molecular ...
... units with equatorially oriented hydroxyl and hydroxymethyl groups able. However, a direct nitration of wood yields undegraded cellulose trinitrate, which is soluble in organic solvents. Determination of its weight-average molecular ...
Pagina 7
... units, which are substituted at C-6 with a variable number of a single u-D-galactopyranose unit. Glucomannan (hardwood constituent) has the same linear framework as galactoglucomannans, except that it is unsubstituted and has a higher ...
... units, which are substituted at C-6 with a variable number of a single u-D-galactopyranose unit. Glucomannan (hardwood constituent) has the same linear framework as galactoglucomannans, except that it is unsubstituted and has a higher ...
Pagina 8
... units substituted at C-6 with a single a-D-galacturonic acid residue is a major hemicellulose in compression wood (Fig. 1.2). 1.2.2 Lignin Lignin is deposited in the cell walls and the middle lamella as an encrusting substance ...
... units substituted at C-6 with a single a-D-galacturonic acid residue is a major hemicellulose in compression wood (Fig. 1.2). 1.2.2 Lignin Lignin is deposited in the cell walls and the middle lamella as an encrusting substance ...
Sommario
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Altre edizioni - Visualizza tutto
Analytical Methods in Wood Chemistry, Pulping, and Papermaking Eero Sjöström,Raimo Alén Anteprima limitata - 1998 |
Analytical Methods in Wood Chemistry, Pulping, and Papermaking Eero Sjöström,Raimo Alen Anteprima non disponibile - 2010 |
Analytical Methods in Wood Chemistry, Pulping, and Papermaking Eero Sjöström,Raimo Alén Anteprima non disponibile - 2012 |
Parole e frasi comuni
acetic acids addition alkaline amounts analysis analyzed applied aromatic atoms black liquors bleaching bonds carbohydrates carbon carboxylic acids cell wall cellulose characterization Chem chemical chemistry chlorine chromatography column complex components composition compounds concentrations contain degradation depends derivatives derivatization detection determination dissolved distribution effect effluents electrons elements especially esters et al ether example extractives fibers followed formed fraction give hardwood hemicelluloses HMWMs hydrolysis hydroxyl groups identification important inorganic ions isolated kraft pulps lignin mainly mass material measured methods methyl mill mixture molecular weight Niemelä obtained occur OH OH organic origin oxidation phenolic polymer polysaccharides possible preparation present procedure quantitative reaction residual resin acids sample separation Sjöström sodium softwood solid soluble solution solvent spectra spectroscopy standard structures studies sulfite surface Table Tappi techniques tion types units usually various wood xylan York ОН