Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Raili Pönni Name of the doctoral dissertation Changes in accessibility of cellulose for kraft pulps measured by deuterium exchange Publisher School of Chemical Technology Unit Department of Forest Products Technology Series Aalto University publication series DOCTORAL DISSERTATIONS 68/2014 Field of research Forest Products Che...

The Ce/ Ce redox system was studied to initiate the grafting of idustrial cellulose pulp with vinyl acetate monomer. The parameters of the copolymerization reaction (reaction time, temperature, monomer and initiator contentration, freeness, chemical composition of the cellulose) were investigated and their effects are discussed.

Poly(ethylene-alt-maleic acid), PEMAc, is a linear polymer that, along with its isomer polyacrylic acid, has the highest carboxylic acid content of any polymer. The goal this work was to elucidate mechanisms that control amount PEMAc permanently fixed on pulp fibers after impregnation dry dilute solution followed by drying/heating (curing). Two which cellulose were discovered, chemical, and phy...

BACKGROUND The development in the deinking process has made recycled fiber a major part of the raw material for pulp and paper industry. Enzymes have revolutionized the deinking process obtaining brightness levels surpassing conventional deinking processes. This study explores the deinking efficiencies of bacterial alkalophilic laccase (L) and xylanase (X) enzymes along with physical deinking m...

Combustion behavior (swelling during combustion and combustion time) of the kraft black liquors varies significantly between pulp mills and also time-dependent variations within a mill occur. In addition, due to the different raw materials and pulping conditions, some further variations in these combustion properties are typically observed. Therefore, by means of the proper process control and ...

statement of problem: mineral trioxid aggregate (mta) cement is widely used for root-end filling, pulp capping, perforation repair and other treatments in endodontics. investigations have shown similar physical and chemical properties for portland cement (type i), root mta and proroot mta. purpose: the aim of this in vivo study was to evaluate the reaction of dog canine pulp after pulp capping ...

The objective of this review is to synthesize information available on the feeding value of coffee waste. In the diets of ruminants, waste and by-products of coffee have successfully used 10 to 30%. It has been claimed that the feeding of Coffee leaves extends the lactation period. Coffee pulp (dried or not), coffee hulls (sticky or dried) and coffee grounds (a by-product of instant coffee manu...