Results 81 to 90 of about 91,381 (225)
Century‐Long Records of Sedimentary Input on a Caribbean Reef From Coral Ba/Ca Ratios
Paleoceanography and Paleoclimatology, Volume 39, Issue 5, May 2024.Abstract Coral reef ecosystems are delicately balanced and are thus prone to disruption by stressors such as storms, disease, climate variability and natural disasters. Most tropical coral populations worldwide are now in rapid decline owing to additional anthropogenic pressures, such as global warming, ocean acidification and a variety of local ...
Kathryn M. M. Shaw +6 more
wiley +1 more source
Chemical pulping and bleaching annual research review
, 1995 "March 22, 1995."Closed mill operations - Subtask: Control of nonprocess element: project number F017 / Patrick Bryant ; Closed mill operations - Subtask: VOC control: project number F017 / Junyong Zhu, Patrick Bryant ; Environmentally compatible ...
Carter, Blair R. +15 more
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Tailoring regulatory components for metabolic engineering in cyanobacteria
Physiologia Plantarum, Volume 176, Issue 3, May/June 2024.Abstract The looming climate crisis has prompted an ever‐growing interest in cyanobacteria due to their potential as sustainable production platforms for the synthesis of energy carriers and value‐added chemicals from CO2 and sunlight. Nonetheless, cyanobacteria are yet to compete with heterotrophic systems in terms of space‐time yields and ...
Paul Bolay +4 more
wiley +1 more source
Operating Experience of Improved ECF Bleaching Sequence
JAPAN TAPPI JOURNAL, 2003 ECF bleaching has superseded the conventional chlorine bleaching on NO.3 LBKP-production line in Hachinohe mill of Mitsubishi Paper Mills limited in 2000. The operational data of ECF bleaching for two years made it obvious that the brightness of oxygen-bleached pulp had larger influence on the bleaching efficiency of ECF bleaching than kappa number in ...
openaire +2 more sources
Comparative toxicity of effluents from ECF and TCF bleaching of eucalypt kraft pulps
, 1996 The toxicity of elemental chlorine free (ECF) and totally chlorine free (TCF) effluents from laboratory scale bleaching of eucalypt kraft pulps was compared using a suite of marine bioassays developed by the National Pulp Mills Research Program.
Simon, J (15479501) +5 more
core
, 2021 The aim of this work is to contribute to the process development of the ECF light bleaching sequence Q(OP)D(PO) by providing a better understanding of the bleaching of softwood kraft pulp.
Starrsjö, Sara
core
APPLICATION OF SURFACTANTS AS PULPING ADDITIVES IN SODA PULPING OF BAGASSE
BioResources, 2009 The effects of several non-ionic commercial surfactants and their dosage on soda pulping and ECF bleaching of soda and soda-surfactant pulps of bagasse were investigated.
Yahya Hamzeh +3 more
doaj
Operating Experience of Partial Closure in ECF Bleaching
JAPAN TAPPI JOURNAL, 2004 三菱製紙八戸工場では，漂白白水の部分クローズド化を可能とすることを条件として，新しいECF漂白シーケンスを開発した。このシーケンスは，キレート剤（Q）とキシラナーゼ（X）の同時前処理を行う（QX）処理を持つ過酸化水素ベースのECF漂白シーケンス（QX―P1―H―P2―D）である。このシーケンスを用いた工業実験を行う前に，工程内における金属バランスの調査を行った。工程内へ流入する金属は，チップ由来が殆どである。回収系へ流入した金属は，その殆どがドレッグスとして排出される。しかし，SiとAlは，ドレッグスによる除去率が低いため，系内への蓄積が懸念される。工業実験は，八戸工場にある3系列のパルププラントのうち1つを使い72時間にわたり実施され，ECF漂白によるLBKPの生産が行われた。この中で ...
openaire +1 more source
Inhibition of Yellowing of ECF Bleached Hardwood Kraft Pulp
JAPAN TAPPI JOURNAL, 2007 ECF漂白LBKPをベースとした酸性紙の熱湿褪色機構について調査すると共に，その機構を利用した褪色抑制方法について検討した。調査の結果，ECF漂白LBKPをベースとした酸性紙の熱湿褪色は，LBKP中に含まれるヘキセンウロン酸が原因物質であり，熱湿条件下で酸加水分解により2―フランカルボン酸あるいは5―ホルミル―2―フランカルボン酸に転換し，重合あるいはパルプ中の酸性糖と反応して着色物質を生成し，褪色することがわかった。前記2種のフラン化合物の反応阻害による褪色抑制方法について検討した結果，クエン酸，リンゴ酸，等のカルボキシル基を複数持つ化合物の添加が有効であることがわかった。
Kawae, Ayano, Uchida, Yosuke
openaire +2 more sources
Revista Árvore, 2005 The use of 12-year-old Pinus tecunumanii (Eguiluz e Perry) grown in Colombia was evaluated for bleached kraft pulp production. Kraft pulps of kappa number 30 ± 1 were produced, and oxygen delignified and bleached to 90% ISO with ECF processes.
Leonel F. Torres +2 more
doaj +1 more source