Results 11 to 20 of about 700 (208)

Ozonolysis of Lignin: From Extensive Degradation to Selective Ring-Opening Oxidation. [PDF]

ChemSusChem
Despite its potential as a renewable feedstock, lignin, a major component of plant cell walls and a by‐product of the pulp and paper industry, has long been underutilized. Historically, pulp mills employed ozonolysis, a powerful oxidative process, to delignify cellulosic fibers and break down lignin.
Alexakis AE, Sipponen MH.
europepmc   +2 more sources

ECF BLEACHING WITH A FINAL HYDROGEN PEROXIDE STAGE: IMPACT ON THE CHEMICAL COMPOSITION OF Eucalyptus globulus KRAFT PULPS [PDF]

BioResources, 2010
Two industrial elemental chlorine free (ECF) bleaching sequences, D0(EOP)D1(EP)D2 and OQ(PO)DP, are compared with respect to the bulk content of lignin, carboxyl, hexeneuronic acids (HexA), and reducing groups after each bleaching stage.
Pedro E. G. Loureiro, Eva F. Domingues, Dmitry V. Evtuguin, M. Graça Videira Sousa Carvalho   +3 more
doaj   +1 more source

Bio-Inspired Self-Assembly of Enzyme-Micelle Systems for Semi-Artificial Photosynthesis. [PDF]

Angew Chem Int Ed Engl
This study introduces a bio‐hybrid assembly inspired by lipid‐protein interactions in nature by utilizing photosensitized surfactants that self‐assemble into light‐absorbing micellar scaffolds capable of interfacing with hydrogenases and formate dehydrogenases. This semi‐artificial approach enabled benchmark turnover numbers for solar H2 production and
Liu Y, Rodríguez-Jiménez S, Song H, Pannwitz A, Kim D, Coito AM, Manuel RR, Webb S, Su L, Bonke SA, Milton RD, Pereira IAC, Bonnet S, Hammarström L, Reisner E.   +14 more
europepmc   +3 more sources

Loss of Coral Trait Diversity and Impacts on Reef Fish Assemblages on Recovering Reefs. [PDF]

Ecol Evol
Analyzing 12 years of field survey data, our study uncovers asynchronous changes in species richness and trait diversity during the recovery of reef‐building coral communities on southern Hainan Island. The decrease in corymbose branching corals and the rise in functionally redundant corals explain the loss of trait diversity during coral recovery ...
Huang L, McWilliam M, Liu C, Yu X, Jiang L, Zhang C, Luo Y, Yang J, Yuan X, Lian J, Huang H.   +10 more
europepmc   +2 more sources

Manufacturing of high brightness dissolving pulp from sansevieria-trifasciata fiber by effective sequences processes

Communications in Science and Technology, 2022
The need of dissolving pulp (DP) for rayon fiber production is increasing rapidly in recent years. Sustainable sources of DP raw materials and an effective manufacturing process are urgently required.
Yusnimar, Evelyn, Azka Aman, Chairul, Suci Rahmadahana, Amun Amri   +5 more
doaj   +1 more source

Correlation Analysis for Fiber Characteristics and Strength Properties of Softwood Kraft Pulps from Different Stages of a Bleaching Fiber Line

BioResources, 2014
During sequential bleaching operations, pulp fiber properties are gradually changed due to mechanical and chemical treatments. In this study, the correlations between pulp or fiber properties such as kappa number, viscosity, total charge, fiber length ...
Benping Lin, Beihai He, Yanlan Liu, Lefan Ma   +3 more
doaj   +1 more source

A CORRELATION BETWEEN THE KAPPA NUMBER AND THE VENTORIM INDEX IN THE BLEACHING PROCESS [PDF]

Revista Árvore
The determination of the kappa number in the bleaching process is typically conducted with a pulp quantity between 3 and 4 grams, allowing for the calculation of values above four. However, after the oxidative extraction stage with hydrogen peroxide, the
Vitor Hideyoshi Hayashida Ribeiro, Evelyn Eduarda Gil dos Santos, Fabiana Clara Cezar Alves, Marianne Vitória Gil dos Santos, Higor Rogério Favarim, Gustavo Ventorim   +5 more
doaj   +1 more source

From Hypochlorite Bleaching to an ECF Sequence

JAPAN TAPPI JOURNAL, 2001
Today. the Japanese Pulp and Paper Industry is facing more stringent regulations on chloroform emission. Therefore. most of the pulp mills are looking for a way of decreasing chloroform emission formed during their conventional pulp bleaching. It is well known that chloroform is mainly generated during the hypochlorite stage. With this background.
Jean-Christophe Hostachy, Jerome Cudelou, Pierre Larnicol   +2 more
openaire   +3 more sources

Operating Experience of Ozone ECF Bleaching.

JAPAN TAPPI JOURNAL, 2002
Medium consistency ozone bleaching plant was started up at Yufutsu mill in January 2001. This is the first plant that use ozone gas as a bleaching sequence in Japan. By changing conventional C/D-E/ op-D into ZD-E/op-D, we have entirely excluded the usage of elemental chlorine.
Ito, Hitoshi, Hashiba, Mineo
openaire   +2 more sources

Structural Modifications of Residual Lignins from Sisal and Flax Pulps during Soda-AQ Pulping and TCF/ECF Bleaching [PDF]

, 2016
We have studied the structural modifications of lignins from sisal and flax during their soda-anthraquinone (AQ) pulping and subsequent totally chlorine-free (TCF) and elementary chlorine-free (ECF) bleaching.
Jorge Rencoret (669621), Ana Gutiérrez (1885516), José C. del Río (1885513), Jesús Jiménez-Barbero (1507663), Ángel T. Martínez (1885510), Gisela Marques (1974580)   +5 more
core   +1 more source