By Pratima Bajpai
ISBN-10: 1461414083
ISBN-13: 9781461414087
ISBN-10: 1461414091
ISBN-13: 9781461414094
This publication offers the main updated details to be had on a number of biotechnological strategies worthy within the pulp and paper undefined. all the twenty chapters covers a particular biotechnological procedure or strategy, discussing the benefits, barriers, and destiny clients of crucial and well known tactics utilized in the undefined. subject matters lined comprise tree development, pulping, bleaching, deinking, fiber amendment, biosolids administration, and biorefining.
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Example text
Thus, it appears possible to decrease the costs of the enzymatic pretreatment by repeated use of the same enzyme solution. The efficiencies of the enzymes in the hydrolysis of isolated cambial tissue were also compared. Cambial tissue was isolated from spruce felled during the spring. The polysaccharides in isolated cambium were partially degraded during the isolation, as indicated by the high content of reducing sugars (51% of dry weight) in the reference sample. This effect was probably caused by the endogenous enzymes.
Sulfite process uses different chemicals to attack and remove lignin. The sulphite process is characterized by its high flexibility compared to the kraft process, which is a very uniform method, which can be carried out only with highly alkaline cooking liquor. In principle, the entire pH range can be used for sulphite pulping by changing the dosage and composition of the chemicals (Smook 1992b; Biermann 1996b). Thus, the use of sulphite pulping permits the production of many different types and qualities of pulps for a broad range of applications.
Various grades of paper, including paperboard, printing, writing and industrial or packaging grades sometimes have coatings. Most coated paper is ground with paper made from mechanical pulp. The term “coated free sheet” describes paper made from ground wood-free fibers being produced from chemical pulp. Three major coated paper categories exist – glossy, dull, and mat. Many people equate coated paper with the gloss stock of a magazine. Books and other products may use dull coated paper to retain the advantages of coated paper while reducing light glare.
Biotechnology for Pulp and Paper Processing by Pratima Bajpai
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