Mongolian Journal of Chemistry最新文献_第4页

Antimicrobial, antioxidant and cytotoxic activity on human breast cancer cells of essential oil from Pinus sylvestris. var mongolica needle 樟子松精油对人乳腺癌症细胞的抗菌、抗氧化和细胞毒性活性。蒙古伐针

Mongolian Journal of Chemistry Pub Date : 2020-12-31 DOI: 10.5564/mjc.v21i47.1428

Javzmaa Namshir, A. Shatar, Oyukhan Khandaa, Rentsenkhand Tserennadmid, V. G. Shiretorova, Manh Cuong Nguyen

{"title":"Antimicrobial, antioxidant and cytotoxic activity on human breast cancer cells of essential oil from Pinus sylvestris. var mongolica needle","authors":"Javzmaa Namshir, A. Shatar, Oyukhan Khandaa, Rentsenkhand Tserennadmid, V. G. Shiretorova, Manh Cuong Nguyen","doi":"10.5564/mjc.v21i47.1428","DOIUrl":"https://doi.org/10.5564/mjc.v21i47.1428","url":null,"abstract":"Pinus sylvestris. var mongolica is a major source of timber in Mongolia. The logging process makes many kinds of valuable biomass including bark, cones, and needles, which can be used for obtaining essential oil. The essential oil from the needles of wild growing Pinus sylvestris. var mongolica growing in Mongolia was chemically analyzed and its antibacterial, antifungal and cytotoxic activities were evaluated. The chemical analyses identified 101 compounds in the essential oil with the major compounds of α-pinene (29.87 %), limonene + β-phellandrene (16.15 %), camphene (4.95 %), bornylacetate (4.34 %), and β-pinene (3.88 %). This oil possessed the inhibitory activity against B. subtilis, S. cerevisiae, S. aureus and E. coli, successively with minimum inhibition concentration of 0.125, 0.1, 3.0, and 10.0 µg/mL. Importantly, the oil at 50 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 DPPH (2,2-Diphenyl-1-picrylhydrazyl) radical scavenging was 14.36 ± 0.28 mg/mL. The results, therefore, suggested that the essential oil of a Mongolian Scotch pine could potentially be used as a preservative material in cosmetic and food products, as a bioactive agent in anti-inflammatory and wound healing products in view of its antibacterial activity. Given our findings that this essential oil has such profound activity against MCF-7 cancer cells, a further investigation concerning the full extent of this essential oil’s anticancer activities seems warranted. Furthermore, given the promising antimicrobial effects of this essential oil against various bacterial species, an investigation concerning its effect against drug-resistant bacteria would be of immense interest.","PeriodicalId":36661,"journal":{"name":"Mongolian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43905530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

The study on the antioxidant activity of polysaccharides isolated from Polygonatum odoratum (Mill.) Druce 玉黄精多糖抗氧化活性的研究Druce

Mongolian Journal of Chemistry Pub Date : 2020-12-31 DOI: 10.5564/mjc.v21i47.1154

Wulan Gerile, Naranchimeg Dorjpalam, W. Gui, Liang Xu, Jinglin Liu

引用次数: 1

Investigation on physical activation of some Mongolian coals 部分蒙煤的物理活化研究

Mongolian Journal of Chemistry Pub Date : 2019-12-27 DOI: 10.5564/mjc.v20i46.1238

Batkhishig Damdin, B. Purevsuren, Yuanli Zhang, Haizhen Sun, Ariunaa Alyeksandr, Ankhtuya Ariunbold, Battsetseg Munkhtaivan, Namkhainorov Jargalsaikhan, B. Sanjaa

引用次数: 1

Retraction notice: Influence of compressing pressure on macro void formation carbon monolith for methane adsorption 缩回注意:压缩压力对甲烷吸附碳单体宏观孔隙形成的影响

Mongolian Journal of Chemistry Pub Date : 2019-02-28 DOI: 10.5564/MJC.V19I45.1089

B Narandalai, W. Shim, M. S. Balathanigaimani, H. Moon

引用次数: 0

Characterization and thermogravimetric analysis of oil shale from Uvurjargalant deposit Uvurjargalant矿床油页岩特征及热重分析

Mongolian Journal of Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1085

Khulan Bayasgalan, Myagmargerel Bayanmunkh, Ulzii Baatar, Bolormaa Bayarkhuu, Tuya Murneren

引用次数: 2

Pyrolysis of pine wood and characterisation of solid and liquid products 松木的热解及固体和液体产物的表征

Mongolian Journal of Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1086

B. Purevsuren, Otgonchuluun Dashzeveg, Ariunaa Alyeksandr, Narangerel Janchig, Jargalmaa Soninkhuu

{"title":"Pyrolysis of pine wood and characterisation of solid and liquid products","authors":"B. Purevsuren, Otgonchuluun Dashzeveg, Ariunaa Alyeksandr, Narangerel Janchig, Jargalmaa Soninkhuu","doi":"10.5564/MJC.V19I45.1086","DOIUrl":"https://doi.org/10.5564/MJC.V19I45.1086","url":null,"abstract":"Pyrolysis of pine wood was carried out at different temperatures and the yields of solid (biochar), liquid (tar and pyrolysed water) and gas products were determined. Temperature around 500 ºC was determined as an optimal heating temperature of pyrolysis and approximately 27.1% hard residue (biochar), 21.46% tar, 20.04% pyrolysed water and 31.30% gas were obtained by pyrolysis. The thermal stability indices of pine wood are relatively low, which are indications of its low thermal stability and high yield of volatile matter (Vdaf = 90.3%). The thermal stability indices of pyrolysis of solid residue show that it is characterised by a very high thermal stability than its initial sample, for example, there was an increase of Т5% 7.7 and Т15% 3.8 times. The chemical composition of pyrolysed tar of pine wood has also been determined. Were obtained 4 different fractions with varying boiling temperature ranges of pine wood pyrolysed tar and have determined the yields of each fraction. Neutral tar was analysed by GC/MS and 20 aliphatic compounds, 25 aromatic compounds and 18 polar compounds were determined.","PeriodicalId":36661,"journal":{"name":"Mongolian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42821068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Enhancing lithium leaching by mechanical activation 机械活化强化锂浸出

Mongolian Journal of Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1090

Nader Setoudeh, A. Nosrati, N. Welham

引用次数: 6

Leaching of a Mongolian chalcopyrite concentrate 蒙古黄铜矿精矿的浸出

Mongolian Journal of Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1082

N. Welham, J. Temuujin, Nader Setoudeh

引用次数: 0

Effect of nickel precursor and catalyst activation temperature on methanation performance 镍前驱体和催化剂活化温度对甲烷化性能的影响

Mongolian Journal of Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1084

B. Buyan-Ulzii, Odbayar Daariimaa, Chuluunsukh Munkhdelger, G. Oyunbileg, B. Enkhsaruul

{"title":"Effect of nickel precursor and catalyst activation temperature on methanation performance","authors":"B. Buyan-Ulzii, Odbayar Daariimaa, Chuluunsukh Munkhdelger, G. Oyunbileg, B. Enkhsaruul","doi":"10.5564/MJC.V19I45.1084","DOIUrl":"https://doi.org/10.5564/MJC.V19I45.1084","url":null,"abstract":"This work studied an effect of anionic precursor on the preparation of active and fine nickel metal catalysts for syngas methanation. Nickel catalysts were pr¬epared by impregnation-co-precipitation method. Nickel hydrate salts of Ni(NO3)2·6H2O, NiSO4·6H2O and NiCl2·6H2O were used as a metal catalyst precursor, and the obtained catalysts were named as Ni/Al (N), Ni/Al (S) and Ni/Al (Cl), respectively. Methanation synthesis of carbon monoxide was carried out in a fixed bed stainless reactor. Prior to experiment, the catalyst powder was pressed into tablets, then crushed and sieved to use 0.5-0.9 mm particles. Reactions were performed at the temperature of 350 °C in the pressure of 3 atm of H2:CO syngas (the molar ratio of 3:1) with the GHSV of 3000 h-1. In the present methanation conditions, the Ni/Al (N), Ni/Al (S) and Ni/Al (Cl) catalysts gave the CH4 selectivity of 93%, 18% and 91% (vol.), respectively. The XRD and ICP-OES analysis clarified that although the Ni/Al (S) catalyst contained a similar nickel amount of 17.4 wt % to other two catalysts, its metal distribution was poor. Also the low activity of the Ni/Al (S) catalyst was caused by the contamination of remained sulfur from sulfate precursor. This work also examined an influence of catalyst activation temperature pre-synthesis. The Ni/Al (N) catalyst was reduced by pure hydrogen gas at different temperatures of 350 ºС, 400 ºС or 450 ºС. The catalyst activated at 400 ºС produced the highest CH4 amount of 0.087 mmol·g-1cat for the duration of 1h methanation. An initial temperature of methane formation was the lowest for the Ni/Al (N) catalyst which was activated at 400 ºС among three catalysts.","PeriodicalId":36661,"journal":{"name":"Mongolian Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41479191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Chemical composition and antimicrobial activity of essential oil from Pyrethrum pulchrum Ledeb. 除虫菊挥发油的化学成分及抑菌活性。

Mongolian Journal of Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1088

Uugangerel Erdenetsogt, Choijamts Gotov, K. Voigt, S. Bartram, W. Boland, Enkhmaa Dagvadorj

引用次数: 4