Results 21 to 30 of about 64,537 (313)
Nutritional requirements for the production of dithiolopyrrolone antibiotics by Saccharothrix algeriensis NRRL B-24137 [PDF]
, 2006 The amino acid and humic acid requirements of Saccharothrix algeriensis NRRL B-24137 for growth and production of the dithiolopyrrolone antibiotics were studied in a semi-synthetic medium (SSM).
Bouras, Noureddine +3 more
core +2 more sources
Chemical and spectroscopic analysis of olive mill waste water during a biological treatment [PDF]
, 2007 The treatment of olive mill waste water was studied on the laboratory scale. Physico–chemical analyses showed the final products had a mean pH of 5.4 without neutralisation and 5.7 when lime was added to the process.
Bailly, Jean-René +5 more
core +5 more sources
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
openaire +2 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj
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
doaj +1 more source
Possible role of organic matter in radiocaesium adsorption in soils [PDF]
, 2002 The aim of this review is to examine the hypothesis that organic matter decreases the adsorption of radiocaesium on clay minerals. The factors that determine radiocaesium mobility and bioavailability in soil are briefly outlined to show why a ...
Dumat, Camille +2 more
core +4 more sources
Alteration in elemental and functional composition of heated peat humic acids [PDF]
, 2001 The article analyzes the effect of thermal modification of different-type peat on the alteration of elemental and functional composition of peat humic acids.
Günther, Rolf W. +5 more
core +3 more sources
Бюллетень Почвенного института им. В.В. Докучаева, 2018 Double-shot pyrolysis with gas chromatography and mass detection (Double-shot GC MS) was conducted for a sample of typical chernozem and humic acids separated from it. The humic acids preparations were pyrolyzed at 500, 600 and 700°C.
V. A. Kholodov +3 more
doaj +1 more source