The aim of this study was to evaluate the influence of different restorative procedures on the fracture resistance of endodontically treated teeth submitted to intracoronal bleaching. Fifty upper central incisors were distributed into 5 groups: GI - healthy teeth; GII - endodontically treated teeth sealed with Coltosol; GIII - endodontically treated teeth bleached and sealed with Coltosol; GIV ...

The applicability of cotton-bleached soda pulp (C-BSP) was investigated as a raw material for manufacturing cationic nano-fibrillated cellulose (NFC) via quaternization anionic NFC using glycidyl-trimethyl-ammonium chloride (GMA). prepared by beating and micro-grinding C-BSP, performed post treatment to induce charge reversal in NFC. characteristics manufactured C-BSP hardwood-bleached kraft (H...

INTRODUCTION Arundo donax, Poaceae, commonly known as “nalgrass,” is a member of the reed family that grows both wild and cultivated in California. Evaluated as a potential paper fiber source in Italy and Hungary over 50 years ago and included in the 1970s USDA evaluation of potential annual fiber crops, the high potential of A. donax has not been widely recognized. A new evaluation was begun i...

A variety of the Leucaena genus, Leucaena diversifolia, was used for pulp and paper making by kraft and refining processes and a OD(EP)DP bleaching sequence. The same species has been suggested as an energy crop and, in fact, this species used shows a high gross heating value; besides, this variety of Leucaena has appropriate characteristics for pulp and paper making. The holocellulose content ...

Corn stalk can be used as an alternative non-wood raw material to produce cellulosic dissolving grade pulp. In this work, the potential of corn stalk in the production of dissolving pulp (alpha-cellulose) was investigated. It was collect ed from a corn stalk farm of Kermanshah, Iran. The sequences of experimental work were: water and acid prehydrolysis at 160˚C for 30min, followed by Kraft pulp...

High-yield pulp (HYP) such as bleached chemi-thermo-mechanical pulp (BCTMP) from aspen wood, is now being used in the production of highquality fine papers, and this is particularly true in China. In this study, the effect of using cationic polymers such as poly-aluminum chloride (PAC), polyethylenimine (PEI), cationic polyacrylamide (CPAM), and poly(diallyldimethylammonium chloride) (PDADMAC) ...