Results 21 to 30 of about 11,613 (265)
Study on Lignite Humic Acids(III)On the Nitro Humic Acids.
Journal of the Fuel Society of Japan, 1955 亞炭フミン酸から諸種の條件によりニトロフミン酸の製造を行い, 各種條件で得られたニトロフミン酸の性質からフミン酸に対する硝酸の作用の概要を調べた。その結果フミン酸に対する硝酸の作用の最大のものは酸化反応であり, 加水分解反応もまた大きな作用であることを知つた。また酸化反応はフミン酸構成単位の脂肪族鎖を切断する方向に進行する。このことは稍々多量に製造したニトロフミン酸につきその示性式を求めることにより, さらに明白となつたまた。従来フミン酸と稍酸の反応で全く見落されていたシアン化水素並びにアンモニヤの生成を知り, その定量を行い, それらの生成がフミン酸のフェノール性に基くことを推定した。またフミン酸とジアゾメタンの反応によりO-メチル化以外に一部ジアゾメタンの附加が起ることを認め ...
Kozo Higuchi +2 more
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The effect of fertilization with brown coal on Haplic Luvisol humic acids
Plant, Soil and Environment, 2002 The influence of fertilization with brown coal (used as preparation called Rekulter) on properties of humic acids extracted from haplic luvisol was studied.
B. Dębska +2 more
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Humic acids trigger the weak acids stress response in maize seedlings
Chemical and Biological Technologies in Agriculture, 2020 Background Plants primed by humic acids showed physiological and molecular response against different abiotic stresses without the presence of stressor agents (salinity, drought, heavy metal toxicity).
Daiane Carvalho Baía +5 more
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Бюллетень Почвенного института им. В.В. Докучаева, 2019 The article provides research results and comparative analysis of humic acids in sod-podzolic soil of the Experimental Forest of the Russian State Agrarian University (protected area) and urban soils located in the Timiryazev district of Moscow.
A. I. Filatova +2 more
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Replenishing Humic Acids in Agricultural Soils
Agronomy, 2016 For many decades, it was commonly believed that humic acids were formed in soils by the microbial conversion of plant lignins. However, an experiment to test whether these humic acids were formed prior to plant matter reaching the soil was never reported
Michael Susic
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Utilisation of chemically treated coal [PDF]
Acta Montanistica Slovaca, 2002 The numerous application of coal with high content of humic substances are known. They are used in many branches of industry. The complex study of the composition of coal from upper Nitra mines has directed research to its application in the field of ...
Beovská Mária +2 more
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Acclimation with humic acids enhances maize and tomato tolerance to salinity
Chemical and Biological Technologies in Agriculture, 2021 Background Salinity is one of the major environmental threats to agriculture, limiting plant growth and reducing crop yield. The use of humic substances to alleviate salt stress in plants is well reported, but the mechanisms remain unclear.
Aline Costa Souza +10 more
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C, 2022 The possibility of increasing the complexity of the operational properties of environmentally safe biodegradable polymer hydrogel materials based on hydroxypropyl methylcellulose due to modification by humic acids from lignite is considered.
Denis Miroshnichenko +5 more
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HUMIC ACIDS IN THE ENVIRONMENT
, 2023 Humic acids, belonging to the humic substances, are the most reactive organic compounds in water, soil and sediments. They are known for their role in processes related to soil structure, biology, and chemistry, as well as for their effects on the behavior of environmental pollutants.
Marković, Mirjana +3 more
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Interaction of metal ions with humic acids of brown coals of Kazakhstan
Journal of Experimental Nanoscience, 2020 This paper investigates interaction processes of the Fe3+, Cu2+, Ni2+, and Co2+ cations with humic acids isolated from brown coals of Ekibastuz basin.
A. Dauletbay +3 more
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