Results 111 to 120 of about 150,716 (298)

Distinct decomposition dynamics of heterogeneous carbon components in cultivated agricultural soils controlled by flexible microbial substrate utilization strategy

Journal of Integrative Agriculture
Improving soil organic matter (SOM) maintenance is crucial for terrestrial carbon (C) sequestration and ecosystem functioning. Conservation tillage favors SOM pool buildup; however, it remains unclear how the decomposition of heterogeneous components is ...
Wanqi Wang, Xuefeng Zhu, Yuzhu Li, Shuhan Dong, Yan Liu, Kaikai Min, Huijie Lü, Wei Zhang, Hongbo He, Xudong Zhang   +9 more
doaj   +1 more source

Coupled Photocatalytic Hydrogen Production With Selective Biomass Valorization via Active Sites Construction and Electron Transport Channels Engineering

Carbon Energy, EarlyView.
A ternary CdS/1T‐WS2/CNTs heterojunction is in‐situ constructed via hydrothermal method, which is used for photocatalytic biomass reforming (biomass‐derived alcohols, lignin). It exhibits outstanding performance: H2 production rate of 26.17 mmol/g/h for benzyl alcohol (BA), benzaldehyde (BD) generation rate of 8.29 mmol/g/h, 90.06% BD selectivity, 100%
Ermiao Liang, Yi Li, Xue Liu, Ke Cheng, Baoqi Li, Mingcong Xu, Sha Luo, Chunhui Ma, Zhijun Chen, Zupeng Chen, Shouxin Liu, Wei Li   +11 more
wiley   +1 more source

DETERMINACIÓN DE FENOLES TOTALES EN DERIVADOS LÍGNICOS OBTENIDOS DEL “LICOR NEGRO” COMO ALTERNATIVA DE PRODUCCIÓN // DETERMINATION OF TOTAL PHENOL DERIVATIVES OBTAINED FROM LIGNIN "BLACK LIQUOR" AS ALTERNATIVE TO PRODUCTION

Publicaciones en Ciencias y Tecnología, 2015
Lignin is an industrial waste being worthless in papermaking byproduct of black liquor obtained from the pulping process in some Venezuelan plants.
María José López Villalobos, Irama Isabel Piña Sáenz, Yakelin Abou Masoud, Fredy José Ysambertt   +3 more
doaj  

Differential Soil Organic Carbon Accumulation Patterns Following Cropland-to-Grassland Conversion in Non-Saline and Saline–Alkali Soils

Agriculture
Agricultural expansion and intensification generally lead to a depletion in soil organic carbon (SOC). While converting cropland to grassland is a recognized strategy for SOC accumulation, the patterns of SOC accumulation under different grassland types ...
Jinglei Zhang, Shanshan Bai, Chunlin Jia, Lele Kang, Yuxue Zhang, Cong Guan, Jinhong Zhang, Daniel Horacio Basigalup, Bo Wu, Guoliang Wang   +9 more
doaj   +1 more source

Reaction of Lignin with Phenol Sulfonic Acids

The Journal of the Society of Chemical Industry, Japan, 1960
フェノールはリグニンと反応して,フェノールの水酸基に対してオルトあるいはパラ位でリグニン中の活性基と核縮合してフェノールリグニンを生ずると考えられている。この反応機構を明らかにし,また水溶性のリグニン誘導体をうる目的でo-およびp-のフェノールスルホン酸とリグニンとの反応を試み,次の結果を得た。(1)リグニンとフェノールスルホン酸は脱水系において容易に反応して,水溶性のフェノールスルホン酸リグニンを生ずる。(2)o-フェノールスルホン酸がp- フェノールスルホン酸より反応性に富む。(3) 赤松木粉とo - フェノールスルホン酸を60～80℃で6～3時間反応させると,メトキシル量より推定して95～99%のリグニンが水溶性となる。(4)そのさい ...
Kouji Nakajima, Yoshikazu Hachihama, Friedrich Emil Brauns   +2 more
openaire   +2 more sources

Advances in Unraveling the Structure and Sodium‐Ion Storage Behaviors of Hard Carbons: From Basic to Extended Characterization Techniques

Carbon Energy, EarlyView.
This review is devoted to introducing the structures and sodium storage mechanisms of hard carbon materials and analyzing the correlated advanced characterization techniques. The advanced characterization techniques are categorized based on the classification of signal sources.
Jiechang Gao, Dongqi Zhang, Guanglei Qiu, Ye Han, Haijun Zhang, Yajie Liu, Zhixin Tai   +6 more
wiley   +1 more source

Estimation of Free Phenolic Groups in Lignin

Communications, Faculty Of Science, University of Ankara Series B Chemistry and Chemical Engineering, 1969
A method has been developed for the determination of free phenolic groups in softwood lignin. It is based on the colour reaction occurring between 1-nitroso 2-naphthol and eugenol.The colour reaction of l-nitroso-2—naphthol with a variety of substances containing one or two guaiacyl nuclei (representing probable structural prmcipales of lignin) has ...
openaire   +2 more sources

Mass, inverse of mass, uncertainty in inverse of mass, F14C value and uncertainty in F14C value of standard compounds used for 14C blank assessment in compound-specific radiocarbon analysis of lipid biomarkers and lignin phenols

, 2020
Compound-specific radiocarbon dating often requires working with small samples of < 100 µg carbon (µgC). This makes the radiocarbon dates of biomarker compounds very sensitive to biases caused by extraneous carbon of unknown composition, a procedural ...
van der Voort, Tessa, Mollenhauer, Gesine, University of Bremen, Geological Institute, Montluçon, Daniel, Sun, Shuwen, Meyer, Vera D, Alfred Wegener Institute, McIntyre, Cameron, Wacker, Lukas, Dummann, Wolf, Haghipour, Negar, Eglinton, Timothy I., Montluçon, Daniel B., van der Voort, Tessa Sophia, Hefter, Jens, Laboratory of Ion Beam Physics (LIP), ETH, Gentz, Torben, ETH Zurich, Eglinton, Timothy Ian, University of Cologne, Winterfeld, Maria, Meyer, Vera D., Pilot National Laboratory for Marine Science and Technology, Dolman, Andrew M., Dolman, Andrew M, AMS Laboratory, SUERC   +26 more
core   +1 more source

Mechanistic Insights Into Sustainable Catalytic Pyrolysis of Biomass‐Derived Ferulic Acid: The Role of Alumina Regeneration

Chemistry – A European Journal, EarlyView.
Surface‐bound ferulate phenolate complexes undergo styrene‐like polymerization on alumina, yielding a polymeric carbonaceous layer that progressively transforms into polyaromatic carbon domains with concomitant release of aromatic products, while parallel surface‐assisted decarboxylation produces 4‐vinylguaiacol. ABSTRACT A fundamental understanding of
Tetiana V. Kulik, Borys B. Palianytsia, Mykola M. Ilchenko, Nataliia S. Nastasiienko, David J. Morgan, Liudmila P. Storozhuk, David J. Willock, Greg Shaw, Duncan F. Wass, Rafael Luque, Philip R. Davies, Mykola T. Kartel   +11 more
wiley   +1 more source

Highly selective generation of vanillin by anodic degradation of lignin: a combined approach of electrochemistry and product isolation by adsorption

Beilstein Journal of Organic Chemistry, 2015
The oxidative degradation of lignin into a variety of valuable products has been under investigation since the first half of the last century. Especially, the chance to claim this cheap, abundant and renewable source for the production of the important ...
Dominik Schmitt, Carolin Regenbrecht, Marius Hartmer, Florian Stecker, Siegfried R. Waldvogel   +4 more
doaj   +1 more source