Results 151 to 160 of about 1,461,675 (351)

Multi-method Study on Aquatic Humic Substances from the "Rio Negro" - Amazonas State/Brazil: Emphasis on Molecular-Size Classification of their Metal Contents

open access: yesJournal of the Brazilian Chemical Society, 1999
The aquatic humic substances investigated in this study were conventionally isolated from Rio Negro waters - Amazonas State/Brazil by means of the collector XAD 8.
Rocha J.C.   +4 more
doaj  

Hexavalent chromium reduction in manganese-rich soils by ZVI nanoparticles: the influence of natural organic matter and manganese oxides [PDF]

open access: yes, 2017
Hexavalent chromium reduction by nano Zero-Valent Iron (nZVI) has been proved fast and efficient, mainly due to nanoparticles large specific surface area and high chemical reactivity. In this work the influence of natural organic matter and manganese
Di Palma, L., Verdone, N., Vilardi, G.
core  

Fritz Scheffer Under National Socialism: Assessing His Political Involvement

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Aims This article examines the role of soil scientist Fritz Scheffer (1899–1979) under National Socialism and offers a critical assessment of his scientific, institutional, and political positioning between 1933 and 1945. It asks how Scheffer shaped his career within the tension between disciplinary specialization, political expectations, and ...
Jan Arend
wiley   +1 more source

Biomass Carbon in Harvest Residues of Winter Oilseed Rape Across Fertilizer N Rates: Implications for Carbon Input Estimations in Soil Carbon Models

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background: Reliable estimation of carbon (C) inputs from above‐ and belowground residues at different yield levels is crucial, as these inputs drive soil organic carbon (SOC) models for C accounting. Aims: This study quantifies C inputs from different components of winter oilseed rape (WOSR) and compares them with estimates from various ...
Ozan Ozkiper   +4 more
wiley   +1 more source

Hydration of Humic Substances [PDF]

open access: yes, 2011
Tato dizertační práce studuje charakter hydratační vody v systému voda/huminová látka. Úkolem je určit jak kvantitativní, tak i kvalitativní aspekty hydratace huminových látek (HS) v pevné i kapalné fázi a prozkoumat rozdíly ve vlastnostech vody ...
Bursáková, Petra
core  

One Hundred Years of the German Soil Science Society (DBG) 1926–2026: Origins, Facts, and Background of an Eventful History

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT On its 100th anniversary in 2026, the German Soil Science Society (DBG) is looking back not only on an eventful history with traditions and impressive achievements but also with painful interruptions and ruptures. One curious fact is that the DBG was initially founded as the national section of the International Soil Science Society (ISSS ...
Karl‐Heinz Feger
wiley   +1 more source

Evaluation of nanocellulose films enriched with humic substances for remediation of environments contaminated by Cd and Pb

open access: yesDiscover Environment
Strategies to minimize the impacts generated on the environment, with the use of ecologically interesting and low-cost adsorbent materials are of environmental relevance.
Dayane Melo Santos   +5 more
doaj   +1 more source

How the Physical and Chemical Properties Affect the Heavy Metal Content in Surface Water in Different Types of Peatlands

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT Only ~3% of the global land surface is covered by peatlands, yet more than one‐third of global soil carbon is stored in these ecosystems and contaminant filtration can be provided. The extent to which peat humification (Fibric–Hemic–Sapric) is linked to dissolved heavy metals in peatland surface waters has remained poorly quantified at a ...
Stanisław Łyszczarz   +8 more
wiley   +1 more source

Relationship of molecular structure and the growth stimulating activity of humic substances from lignin

open access: yesRUDN Journal of Ecology and Life Safety, 2012
Relationship between the descriptors of the molecular composition of humic preparation «Lignohumate®» and growth stimulating activity against radish seeds is found.
N G Bakanova, G A Kalabin, V V Podgorsky
doaj  

Changes in the Physicochemical Characteristics of Humic Acids in a Hydrodynamic Rotor-Pulsation Apparatus

open access: yesEurasian Chemico-Technological Journal
The work presents research results of the change comparison of brown coals and the study of the physicochemical properties of humic substances obtained from brown coals of the Karazhyra, Ekibastuz, and Kyzyl-Kiya deposits after hydrodynamic treatment in
B.T. Omarov   +3 more
doaj   +1 more source

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