Results 71 to 80 of about 9,076 (227)

Humic fractions as support for the classification of high-mountain Organossolos in the southeast of Brazil [PDF]

Revista Brasileira de Ciência do Solo
Brazilian Soil Classification System (SiBCS) adopts a hierarchical approach to classify soils using specific diagnostic attributes. Organossolos (Histosols) class is differentiated according to its genesis, especially because the parent material is ...
Melania Merlo Ziviani, Luciele Hilda da Silva, João Pedro Comendouros Scott, Amanda Sales Alves, Luiz Alberto da Silva Rodrigues Pinto, Marcelo Souza Motta, Eduardo Carvalho da Silva Neto, Marcos Gervasio Pereira, Lúcia Helena Cunha dos Anjos   +8 more
doaj   +1 more source

A magyarországi termálvíz kincs szervesgeokémiai jellemzése: termálvíz - kerogén/bitumen kölcsönhatás geokémiai kutatása = Organic geochemical characterisation of Hungarian thermal waters and study on interplay between thermal water and kerogen/bitumen in rocks [PDF]

, 2011
Hévizeink szerves anyagai eredetét, minőségét és viselkedését kutatttuk. A vizsgálatok területei: 1 a hévizek szerves és szervetlen fáciesének kölcsönhatása, hőmérséklet-, mélység- és időfüggés; 2 hévizek humin anyagai (aromás prekurzorok); 3 a szerves ...
Brukner, Sándorné, Hetényi, Magdolna, Horváth, István, Kárpáti, Zoltán, Sajgó, Csanád, Veto, István   +5 more
core  

Comparison of humic and fulvic acids from different soils by pyrolysis-mass spectrometry [PDF]

, 1978
7 pages, 3 figures, 11 references.[EN]: Several recent publications showed the usefulness of pyrolysis mass spectrometry for the characterization of the organic matter of total soil samples and of soil organic matter fractions.
Martín Martínez, Francisco, Sáiz-Jiménez, Cesáreo   +1 more
core   +1 more source

Full, Reactive Solubilization of Humin Byproducts by Alkaline Treatment and Characterization of the Alkali-Treated Humins Formed [PDF]

ACS Sustainable Chemistry & Engineering, 2015
The valorization of the humin byproducts that are formed during hydrothermal, acid-catalyzed dehydration of carbohydrates is hampered by the insolubility of these byproducts. Here, we report on an alkaline pretreatment method that allows for the insolubility of this highly recalcitrant and structurally complex feed to be overcome.
van Zandvoort, Ilona, van Eck, Ernst R. H., de Peinder, Peter, Heeres, Hero J., Bruijnincx, Pieter C. A., Weckhuysen, Bert M.   +5 more
openaire   +5 more sources

Understanding the Chemical and Electronic Properties of Sub‐Monolayer TiO2 on High Surface Area Silica for Jet Fuel Synthesis Applications

Advanced Functional Materials, Volume 36, Issue 1, 2 January 2026.
Sub‐monolayer titania grafted onto mesoporous silica enables solvent‐free photocatalytic upgrading of furfural and cyclopentanone into jet fuel precursors. Advanced spectroscopic methods reveal tunable surface speciation, acidity, and bandgaps, enhancing catalytic efficiency.
Mark A. Isaacs, Charalampos Drivas, Arthur Graf, Sasha Kroon, Santosh Kumar, Junxi Liu, Antonio Torres‐Lopez, Cameron Price, Edward Garland, Ines Lezcano‐Gonzalez, Christopher. M. A. Parlett, Vannia C. dos Santos‐Durndell, Lee J. Durndell   +12 more
wiley   +1 more source

Soil organic matter and fertility of anthropogenic dark earths (Terra Preta de Índio) in the Brazilian Amazon basin. [PDF]

, 2011
Propriedades de fertilidade, carbono total (Ctot) e frações químicas da matéria orgânica (fração ácidos fúlvicos - FA, fração ácidos húmicos - HA e fração humina - HUM) foram comparados entre solos antrópicos (Terra Preta de Índio) e Latossolos sem ...
BENITES, V. de M., CANELLAS, L. P., CUNHA, T. J. F., MADARI, B. E., RIBEIRO, L. P., SANTOS, G. de A.   +5 more
core  

Influence of organic matter transformations on the bioavailability of heavy metals [PDF]

, 2011
6 páginas, 3 tablas.The agricultural use of anaerobically digested sewage sludge (ADSS) as stable, mature compost implies knowing its total content in heavy metals and their bioavailability.
Ingelmo, Florencio, Molina, María José, Soriano Rodrí­guez, María Desamparados, Gallardo Izquierdo, Antonio, Lapeña, Leonor   +4 more
core   +2 more sources

Activation of Molecular Oxygen by Electron‐Rich Materials for Sustainable Soil Remediation

Advanced Science, Volume 13, Issue 4, 19 January 2026.
Abundant molecular oxygen (O2) in nature can be utilized and activated by electron‐rich materials to generate reactive oxygen species for in situ engineering remediation of contaminated soil. The material types, activation mechanisms, and influencing factors are discussed in the research.
Hengxin Liu, Yueming Han, Ruohan Li, Yuntao Guan, Lixun Zhang   +4 more
wiley   +1 more source

Pedogenesis in an Archaeological Dark Earth – Mulatto Earth Catena over Volcanic Rocks in Western Amazonia, Brazil

Revista Brasileira de Ciência do Solo, 2018
Archaeological Dark Earth (ADE) pedogenesis and pre-Columbian history are fundamental for understanding the biodiversity and pedodiversity of the Neotropical rainforest in the Amazon region.
Luís Antônio Coutrim dos Santos, Jane Kelly Silva Araujo, Valdomiro Severino de Souza Júnior, Milton César Costa Campos, Marcelo Metri Corrêa, Regilene Angélica da Silva Souza   +5 more
doaj   +1 more source

Challenges in lignin valorization during biomass hydrogenolysis for ethylene glycol production

Biofuels, Bioproducts and Biorefining, Volume 20, Issue 1, Page 268-279, January/February 2026.
Abstract This study examined the extent to which lignin upgrading is possible when maximizing ethylene glycol (EG) production during the hydrogenolysis of lignocellulosic biomass over bifunctional tungsten–nickel catalysts. Reductive catalytic fractionation (RCF) was selected as a benchmark lignin valorization process because its reaction conditions ...
Romolo Di Sabatino, Diana C. Ruiz‐Flores, Sascha R.A. Kersten, Jean‐Paul Lange, M. Pilar Ruiz   +4 more
wiley   +1 more source