4 articles for “Brown Coal”

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Research ArticleOpen accessPhrase in the titlePhysico-Сhemical Parameters of Humic Substances of Brown Coal and their Effect on the Growth of Phoenix dactyliferaDamilya Konysbaeva, Bolat Yermagambet, Zhanar Kassenova et al.The motivation for the study was the need to obtain data on the effect of humic acids isolated from brown coal on soil fertility and plant development. In our study, we conducted experiments with plants to isolate humic substances from brown coal and study its physicochemical properties and the effect of the resulting fraction on the growth of Phoenix dactylifera … …OnLine Journal of Biological Sciences, Vol. 23, Issue 4 · 21 Sep 2023 · 4,936 accessesView PDF Cite

Research ArticleOpen accessIn the abstractEnvironmental Risk Assessment of Coal-Ash-Amended Soil Based on Continuous Planting of PakchoiWenxuan Sun, Liyong Bai, Huihui Ji et al.The agricultural application of coal ash which contains a variety of chemical nutrients may also cause heavy metal pollution of crops and soil. In this study, pakchoi was cultivated for four consecutive seasons in pots of brown soil amended with fly ash or bottom ash. With subsequent plantings, the total concentrations in the four fractions of Pb, Cr and Cu … …American Journal of Biochemistry and Biotechnology, Vol. 17, Issue 2 · 11 May 2021 · 6,862 accessesView PDF Cite

Research ArticleOpen accessIn the abstractStudy of Supercritical Coal Extraction in Toluene Containing FluidsPeter Nikolayevich Kuznetsov, Svetlana Mikhaylovna Kolesnikova, Ludmila Ivanovna Kuznetsova, Anastasia Valerievna KazbanovaThe conversion of brown coals and sapropelic coal in toluene containing mixtures with co-solvents (water, ethanol and tetralin) was studied under sub- and supercritical conditions within the temperature range of 375-550°C and at pressures from 7 to 40 MPa. It was found that the extent of coal extraction in the toluene solvent medium, at 400°C, was significantly increased by the … …American Journal of Applied Sciences, Vol. 13, Issue 3 · 1 Mar 2016 · 7,610 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe First Report of the Occurrence of Anthracnose Disease Caused by Colletotrichum gloeosporioides (Penz.) Penz. & Sacc. on Dragon Fruit (Hylocereus spp.) in Peninsular MalaysiaMasanto Masyahit, Kamaruzaman Sijam, Yahya Awang, Mohd Ghazali Mohd SatarProblem statement: The increasing of dragon fruit (Hylocereus spp.) plantations in Malaysia enhances the researches on this crop, particularly focusing on its physico-chemical characteristics, great potential health benefits and nutritional value. However, its scientific report of disease is still lacking, primarily on anthracnose disease. This study was then conducted to investigate the distribution of anthracnose disease on dragon fruit and … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 11,824 accessesView PDF Cite