https://www.mongoliajol.info/index.php/MJC/issue/feed Mongolian Journal of Chemistry 2021-01-19T01:11:45+00:00 Academician J. Temuujin monjourchem@mas.ac.mn Open Journal Systems <p>Published by the Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences.</p> <p>The Mongolian Journal of Chemistry is included on <a title="DOAJ" href="https://doaj.org/toc/2414-0082" target="_blank" rel="noopener">DOAJ</a>,&nbsp;&nbsp;<a title="EBSCO" href="https://www.ebscohost.com/discovery" target="_blank" rel="noopener">EBSCO Discovery Service</a>,&nbsp;&nbsp;<a title="Google Scholar" href="https://scholar.google.com" target="_blank" rel="noopener">Google Scholar</a>,&nbsp; &nbsp;<a title="MJC" href="https://app.dimensions.ai/discover/publication?and_facet_source_title=jour.1148887" target="_blank" rel="noopener">Dimensions</a>,&nbsp;&nbsp;<strong>CAS databases, <a title="CNKI" href="https://enscholar.cnki.net/journal/search" target="_blank" rel="noopener">CNKI</a>,&nbsp;</strong>and&nbsp;<a title="MJC - Scopus" href="https://www.scopus.com/sourceid/21100941615" target="_blank" rel="noopener"><strong>Scopus</strong></a></p> https://www.mongoliajol.info/index.php/MJC/article/view/1462 Preface - vol. 20 2020-12-31T12:28:58+00:00 Jadambaa Temuujin temuujin@mas.ac.mn <p>No Abstract in English</p> 2020-12-31T06:57:23+00:00 ##submission.copyrightStatement## https://www.mongoliajol.info/index.php/MJC/article/view/1249 Iodine adsorption characteristics of activated carbon obtained from Spinacia Oleracea (spinach) leaves 2020-12-31T12:28:58+00:00 Prakash Kumar Jha jhaprakash102@yahoo.com Vinay Kumar Jha vinayj2@yahoo.com <p>Spinach leaves powder was modified by activation with conc. H<sub>2</sub>SO<sub>4</sub> and was characterized by using FTIR, optical microscopy, XRD analysis and methylene blue adsorption method. The maximum specific surface area measured by the Methylene&nbsp;blue adsorption method was 499 m<sup>2</sup>/g. The adsorption of iodine was investigated by varying parameters as pH, adsorbent dose, contact time and I<sub>2</sub> concentration. The adsorption process was fitted to the Langmuir model controlled by pseudo - second –&nbsp; order kinetics with a constant rate value of 0.00305 g/(mg·min). The maximum adsorption was at pH 10. The maximum adsorption capacity was 909.091 mg/g. The ∆G value was -25 kJ/mole, which confirmed the physico - chemcal adsorption process.</p> 2020-12-31T00:00:00+00:00 ##submission.copyrightStatement## https://www.mongoliajol.info/index.php/MJC/article/view/1154 The study on the antioxidant activity of polysaccharides isolated from Polygonatum odoratum (Mill.) Druce 2020-12-31T12:28:59+00:00 Wu Lan Gerile naranchimeg@msue.edu.mn Naranchimeg Dorjpalam naranchimeg@msue.edu.mn Wanyuan Gui naranchimeg@msue.edu.mn Liang Xu naranchimeg@msue.edu.mn Jinglin Liu naranchimeg@msue.edu.mn <p>The polysaccharides isolated from Polygonatum odoratum (Mill.) Druce (POPs) by water extraction, after precipitation with&nbsp;ethanol were purified through deproteinization, decolorization, dialysis, and column chromatography leading to a purified&nbsp;polysaccharide (POPs-I) content of 90.7 %. The scavenging of oxygen free radicals and inhibition of lipid peroxidation&nbsp;(LPO) by POPs-I were analyzed using a colorimetric method. The results showed that the hydroxyl radical scavenging&nbsp;ability of the polysaccharides was weaker than that of benzoic acid, but stronger than those of ascorbic acid and mannitol,&nbsp;and that the superoxide anion radical scavenging ability was inferior to those of all three. When the concentration was&nbsp;higher than 1.0 mg/mL, the POPs-I could inhibit LPO by superoxide anion radicals to a certain degree. Therefore, this work&nbsp;suggests that POPs-I are potential antioxidant agents in medicine and functional food.</p> 2020-12-31T11:57:19+00:00 ##submission.copyrightStatement## https://www.mongoliajol.info/index.php/MJC/article/view/1428 Antimicrobial, antioxidant and cytotoxic activity on human breast cancer cells of essential oil from Pinus sylvestris. var mongolica needle 2020-12-31T12:28:59+00:00 Javzmaa Namshir njavzmaa@icct.mas.ac.mn Altantsetseg Shatar javzmaan@mas.ac.mn Oyukhan Khandaa javzmaan@mas.ac.mn Rentsenkhand Tserennadmid javzmaan@mas.ac.mn Valentina Germanovna Shiretorova javzmaan@mas.ac.mn Manh Cuong Nguyen javzmaan@mas.ac.mn <p><em>Pinus sylvestris. var mongolica</em> is a major source of timber in Mongolia. The logging process makes many kinds of valuable&nbsp;biomass including bark, cones, and needles, which can be used for obtaining essential oil. The essential oil from the&nbsp;needles of wild growing <em>Pinus sylvestris. var mongolica</em> growing in Mongolia was chemically analyzed and its antibacterial,&nbsp;antifungal and cytotoxic activities were evaluated. The chemical analyses identified 101 compounds in the essential oil with&nbsp;the major compounds of α-pinene (29.87 %), limonene + β-phellandrene (16.15 %), camphene (4.95 %), bornylacetate&nbsp;(4.34 %), and β-pinene (3.88 %). This oil possessed the inhibitory activity against <em>B. subtilis, S. cerevisiae, S. aureus</em> and&nbsp;E. coli, successively with minimum inhibition concentration of 0.125, 0.1, 3.0, and 10.0 µg/mL. Importantly, the oil at 50&nbsp;µg/mL and 100 µg/mL inhibited the growth of MCF-7 cells by 45.3 % and 99.7 %. The half of inhibition concentration of&nbsp;DPPH (2,2-Diphenyl-1-picrylhydrazyl) radical scavenging was 14.36 ± 0.28 mg/mL. The results, therefore, suggested that&nbsp;the essential oil of a Mongolian Scotch pine could potentially be used as a preservative material in cosmetic and food&nbsp;products, as a bioactive agent in anti-inflammatory and wound healing products in view of its antibacterial activity. Given&nbsp;our findings that this essential oil has such profound activity against MCF-7 cancer cells, a further investigation concerning&nbsp;the full extent of this essential oil’s anticancer activities seems warranted. Furthermore, given the promising antimicrobial&nbsp;effects of this essential oil against various bacterial species, an investigation concerning its effect against drug-resistant&nbsp;bacteria would be of immense interest.</p> 2020-12-31T12:09:50+00:00 ##submission.copyrightStatement## https://www.mongoliajol.info/index.php/MJC/article/view/1430 Phytochemical and antioxidant properties of Diodia sarmentosa swartz leaves 2021-01-19T01:11:45+00:00 Okoroafor Henry Chinedu okoroaforchinedu@gmail.com Awagu Fidelis Emenike nykefidel@yahoo.com Azeke Ehijie Augusta azekeeaugusta@gmail.com <p>This research studied proximate, phytochemical and antioxidant properties of <em>Diodia sarmentosa</em> leaves. The ethanol and&nbsp;aqueous extracts of the leaves significantly inhibited 2,2-diphenyl-1-picrylhydrazyl (DPPH<sup>o</sup>) radical formation with IC<sub>50</sub>&nbsp;values of 10.994 and 10.121 μg/mL respectively, compared to the ascorbic acid standard (IC<sub>50</sub> value = 17.916 μg/mL).<br>The aqueous extract exhibited more inhibitory effect on thiobarbituric acid-reactive species (TBARS) with IC<sub>50</sub> values of&nbsp;2.657 μg/mL while the ethanol extract had an IC<sub>50</sub> value of 8.53 μg/mL compared to butylated hydroxytoluene standard&nbsp;(IC<sub>50</sub> = 2.142 μg/mL). For the total antioxidant capacity assay, the aqueous extract had higher ascorbic acid equivalent&nbsp;values than the ethanol extract. However, the two solvent extracts showed antioxidant activity. <em>Diodia sarmentosa</em> leaves&nbsp;possess useful phytochemicals which are indicative of its antioxidant properties.</p> 2020-12-31T00:00:00+00:00 ##submission.copyrightStatement##