Results 61 to 70 of about 700 (208)

Lipophilic extractives from nonwood fibers during soda/AQ pulping followed by TCF and ECF bleaching [PDF]

, 2008
In this work we report the chemical composition of lipophilic extractives from several nonwood fibers such as flax, hemp, jute, sisal and abaca, which are used in the manufacture of high-quality paper pulps, during soda/anthraquinone (AQ) pulping ...
Marques, Gisela, Gutiérrez Suárez, Ana, Río Andrade, José Carlos del   +2 more
core  

Kinetics of AOX Formation in Chlorine Dioxide Bleaching of Bagasse Pulp

BioResources, 2014
In this paper, a kinetic model of the first chlorine dioxide bleaching stage (D0) in an elemental chlorine-free (ECF) bleaching sequence is presented for bagasse pulps. The model is based on the rate of adsorbable organic halogen (AOX) formation.
Shuangxi Nie, Shuangquan Yao, Chengrong Qin, Kecheng Li, Xinliang Liu, Lijun Wang, Xueping Song, Shuangfei Wang   +7 more
doaj   +1 more source

Problems and Measures in ECF Bleaching Operation

JAPAN TAPPI JOURNAL, 2007
紀州工場パルプ漂白工程は2004年8月からECF漂白に転換し，2年半が経過した。漂白初段には高温二酸化塩素段を国内で初めて採用，高温二酸化塩素タワー後のプレス洗浄機にはポンプを使わずに供給するシステムを世界で初めて採用した。これまでの操業上のトラブルとしては各所のスケール付着が挙げられる。現在は年2回の定期修理時に高圧洗浄または酸洗浄でスケールを除去する事により定修間連操は可能となっている。高温二酸化塩素処理は色戻り対策として有効であるが，当初計画の90℃から85℃に温度条件を変更して蒸気使用量の削減を図っている。
openaire   +1 more source

Niobium Oxide for Microplastics Degradation—the Effect of Crystal Structure and Morphology

Small Structures, Volume 6, Issue 9, September 2025.
Crystal structure of Nb2O5 significantly affects its photocatalytic activity. Efficient degradation of microplastics is achieved with high proportion of TT‐Nb2O5 and high population of ≈2.75 eV defect level, which is responsible for photocatalytic activity under solar illumination. Different types of microplastics, including environmental microplastics,
Atta Ur Rehman, Kang Ding Han, Muhammad Umair Ali, Yanling He, Aleksandr A. Sergeev, Zhengtian Yuan, Chunyang Dong, Xin Gao, Christelle A. Not, Alan Man Ching Ng, Kam Sing Wong, Zheng Xiao Guo, Ivor Lončarić, Jasminka Popović, Aleksandra B. Djurišić   +14 more
wiley   +1 more source

Host Evaluation: Reliance on Symbionts: A new metric for quantifying nutrient exchange in nutritional mutualisms

Methods in Ecology and Evolution, Volume 16, Issue 9, Page 2048-2066, September 2025.
Abstract Mutualisms between autotrophs and heterotrophs that exchange nutrients are of pivotal importance in the ecology and evolution of life on Earth. However, investigation of holobiont trophic strategy (reliance on autotrophy vs. heterotrophy) is hampered by practical challenges in quantifying their diverse nutritional pathways.
Leonard Pons, Inga Elizabeth Conti‐Jerpe, Isis Guibert, Kuselah Tayaban, Sherry Lyn Sayco, Patrick Cabaitan, Taihun Kim, Cecilia Conaco, David Michael Baker   +8 more
wiley   +1 more source

AOX formation in ECF bleaching at different kappa numbers : Influence of oxygen delignification and hexenuronic acid content [PDF]

, 2002
he aim of this study was to determine how oxygen delignification before bleaching and the hexenuronic acid (HexA) content of the pulps influenced the acisorbable organic halogen (AOX) formation in the elemental chlorine free (ECP) bleaching effluent ...
Germgård, Ulf,, Jour, Pia, Björklund, Magnus, Forsström, Ann-Britt   +3 more
core  

Lipophilic extractives from Eucalyptus globulus pulp during kraft cooking followed by TCF and ECF bleaching [PDF]

, 2001
E-mail address: delrio@irnase.csic.es (J.C. del Río)The chemical composition of lipophilic extractives in paper pulps from Eucalyptus globulus wood during kraft cooking followed by TCF (“totally chlorine free”) and ECF (“elemental chlorine free ...
Romero Sánchez, Javier, Gutiérrez Suárez, Ana, Río Andrade, José Carlos del   +2 more
core  

Effect of Kappa Number Variation on Modified Pulping of Eucalyptus

BioResources, 2016
This work evaluated the impact of brownstock pulp kappa number variations on modified pulping process, oxygen delignification, bleaching, and the physical characteristics on bleached pulp.
Tiago Edson Simkunas Segura, Juliana Rodrigues Siviero dos Santos, Camila Sarto, Francides Gomes da Silva Jr   +3 more
doaj   +1 more source

Anaerobic biodegradability and toxicity of wastewaters from chlorine and total chlorine-free bleaching of eucalyptus kraft pulps. [PDF]

, 1997
Chlorine bleaching effluents are problematic for anaerobic wastewater treatment due to their high methanogenic toxicity and low biodegradability. Presently, alternative bleaching processes are being introduced, such as elemental chlorine-free (ECF) and ...
Lema, J.M., Vidal, G., Soto, M., Mendez-Pampin, R., Field, J.   +4 more
core   +1 more source

Tetra‐Donor Pyrazine Based Thermally Activated Delayed Fluorescence Emitters for Electroluminescence and Amplified Spontaneous Emission

Advanced Functional Materials, Volume 34, Issue 49, December 2, 2024.
The TOC shows the molecular structures of 4tCzPz and 4αCbPz, along with the overlayed electroluminescence and ASE spectra. The green and blue backgrounds correspond to the emission colors of 4tCzPz and 4αCbPz, respectively. Abstract Thermally activated delayed fluorescence (TADF) materials are expected to address triplet‐related losses in electrically ...
Dongyang Chen, Junyi Gong, Jeannine Grüne, Tomas Matulaitis, Alexander J. Gillett, Xiao‐Hong Zhang, Ifor D.W. Samuel, Graham A. Turnbull, Eli Zysman‐Colman   +8 more
wiley   +1 more source