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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
Q4 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
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.
樟子松。蒙古伐是蒙古的主要木材来源。伐木过程产生了许多有价值的生物质,包括树皮、球果和针叶,可用于获取精油。从野生樟子松针叶中提取的精油。对生长在蒙古国的蒙古变种进行了化学分析,并对其抗菌、抗真菌和细胞毒性活性进行了评价。化学分析鉴定了精油中的101种化合物,其中主要化合物为α-蒎烯(29.87%)、柠檬烯+β-水芹烯(16.15%)、樟脑(4.95%)、乙酸冰片酯(4.34%)和β-蒎烷(3.88%)。该油对枯草芽孢杆菌、酿酒酵母、金黄色葡萄球菌和E。大肠杆菌,最小抑制浓度依次为0.125、0.1、3.0和10.0µg/mL。重要的是,50µg/mL和100µg/mL的油对MCF-7细胞的生长分别抑制了45.3%和99.7%。DPPH(2,2-二苯基-1-苦基肼基)清除自由基的半数抑制浓度为14.36±0.28mg/mL。因此,研究结果表明,鉴于其抗菌活性,蒙古苏格兰松精油有可能用作化妆品和食品中的防腐剂,也有可能用作抗炎和伤口愈合产品中的生物活性剂。鉴于我们的发现,这种精油对MCF-7癌症细胞具有如此深刻的活性,关于这种精油抗癌活性的全面范围的进一步研究似乎是有必要的。此外,鉴于这种精油对各种细菌具有良好的抗菌作用,研究其对耐药细菌的作用将引起极大的兴趣。
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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
Q4 Chemistry Pub Date : 2020-12-31 DOI: 10.5564/mjc.v21i47.1154
Wulan Gerile, Naranchimeg Dorjpalam, W. Gui, Liang Xu, Jinglin Liu
The polysaccharides isolated from Polygonatum odoratum (Mill.) Druce (POPs) by water extraction, after precipitation with ethanol were purified through deproteinization, decolorization, dialysis, and column chromatography leading to a purified polysaccharide (POPs-I) content of 90.7 %. The scavenging of oxygen free radicals and inhibition of lipid peroxidation (LPO) by POPs-I were analyzed using a colorimetric method. The results showed that the hydroxyl radical scavenging ability of the polysaccharides was weaker than that of benzoic acid, but stronger than those of ascorbic acid and mannitol, and that the superoxide anion radical scavenging ability was inferior to those of all three. When the concentration was higher than 1.0 mg/mL, the POPs-I could inhibit LPO by superoxide anion radicals to a certain degree. Therefore, this work suggests that POPs-I are potential antioxidant agents in medicine and functional food.
从玉竹药材中分离得到的多糖经水提、乙醇沉淀后,经脱蛋白、脱色、透析、柱色谱等方法纯化,纯化后的多糖(POPs-I)含量为90.7%。用比色法分析了POPs-I对氧自由基的清除作用和对脂质过氧化(LPO)的抑制作用。结果表明,多糖对羟基自由基的清除能力弱于苯甲酸,但强于抗坏血酸和甘露醇,对超氧阴离子自由基的清理能力不如三者。当浓度高于1.0mg/mL时,POPs-I对超氧阴离子自由基LPO有一定的抑制作用。因此,这项工作表明POPs-I在医学和功能性食品中是潜在的抗氧化剂。
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引用次数: 1
Investigation on physical activation of some Mongolian coals 部分蒙煤的物理活化研究
Q4 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
Activation characteristics of four different Mongolian coals were investigated. The coals were carbonized at temperatures of 550 °C and the obtained samples were activated by preheated steam. The pore size, pore volume and surface areas of all activated carbons (AC) have been determined by adsorption of nitrogen (N2) gas. The BET surface areas of Aduunchuluun (ACAC), Shivee Ovoo (SCAC), Baganuur (BCAC) coal and Ulaan Ovoo coals (UCAC) are 283, 205, 251 and 460 m2/g respectively. Langmuir surface area is 283 m2/g of ACAC, 230 m2/g of SCAC, 537 m2/g in UCAC and 254 m2/g in BCAC.
研究了4种不同蒙古煤的活化特性。煤在550℃的温度下炭化,得到的样品用预热蒸汽活化。用氮气吸附法测定了活性炭的孔径、孔体积和比表面积。阿杜温楚伦煤(ACAC)、Shivee Ovoo煤(SCAC)、Baganuur煤(BCAC)和乌兰Ovoo煤(UCAC)的BET表面积分别为283、205、251和460 m2/g。Langmuir表面积ACAC为283 m2/g, SCAC为230 m2/g, UCAC为537 m2/g, BCAC为254 m2/g。
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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
Q4 Chemistry Pub Date : 2019-02-28 DOI: 10.5564/MJC.V19I45.1089
B Narandalai, W. Shim, M. S. Balathanigaimani, H. Moon
RETRACTION NOTICEOn 21rd February 2019, the Editorial Board of the Mongolian Journal of Chemistry decided to retract this article entitled "Influence of compressing pressure on macro void formation of carbon monolith for methane adsorption" because of an authorship dispute. The article was originally published in Vol.18 No.44 2017 pp.24-35. doi: https://doi.org/10.5564/mjc.v18i44.934
撤回通知2019年2月21日,由于作者争议,《蒙古化学杂志》编委会决定撤回这篇题为《压缩压力对甲烷吸附用炭块宏观孔隙形成的影响》的文章。这篇文章最初发表在2017年第18卷第44期第24-35页。doi:https://doi.org/10.5564/mjc.v18i44.934
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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
Q4 Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1085
Khulan Bayasgalan, Myagmargerel Bayanmunkh, Ulzii Baatar, Bolormaa Bayarkhuu, Tuya Murneren
The yield, properties and composition of soluble and insoluble (kerogen) of organic matter of oil shale from Uvurjargalant deposit of Mongolia have been investigated in this study. The study result shows that oil shale contains low amount of moisture and volatile products, while the ash yield is high (71.86 %) - which implies that most of the oil shale are minerals. The total amount of bitumens in the oil shale was very low (1.27 wt %), whereas kerogen content was 22.84 wt %, which is relatively high compared to oil shale from other deposits in Mongolia. Under IR spectral analysis and the ratio of hydrogen and carbon, the Uvurjargalant oil shale belongs to I type of oil shale. The thermogravimetric analysis showed that organic matter of oil shale decomposed at a temperature 300-750 ºC to produce gas and liquid products.
研究了蒙古乌武尔贾尔加兰特油页岩有机质的产量、可溶性和不溶性(干酪根)的性质及组成。研究结果表明,油页岩的水分和挥发性产物含量较低,而灰分产率较高(71.86%),这意味着油页岩大部分是矿物。油页岩中沥青的总量非常低(1.27wt%),而干酪根含量为22.84wt%,与蒙古其他矿床的油页岩相比,这是相对较高的。根据红外光谱和氢碳比分析,乌武尔贾甘特油页岩属于I型油页岩。热重分析表明,油页岩的有机物在300-750ºC的温度下分解,产生气体和液体产物。
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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
Q4 Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1086
B. Purevsuren, Otgonchuluun Dashzeveg, Ariunaa Alyeksandr, Narangerel Janchig, Jargalmaa Soninkhuu
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.
在不同温度下对松木进行热解,测定固体(生物炭)、液体(焦油和热解水)和气体产物的产率。500℃左右为热解的最佳加热温度,热解得到的硬渣(生物炭)约为27.1%,焦油约为21.46%,热解水约为20.04%,气体约为31.30%。松木的热稳定性指数相对较低,说明其热稳定性低,挥发分产率高(Vdaf = 90.3%)。固体渣油热解的热稳定性指标表明,其热稳定性比初始样品高,分别提高了Т5% 7.7倍和Т15% 3.8倍。测定了松木热解焦油的化学成分。在不同的沸点范围内得到了4种不同馏分的松木热解焦油,并测定了各馏分的产率。用GC/MS分析了中性焦油,测定了20种脂肪化合物、25种芳香族化合物和18种极性化合物。
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引用次数: 3
Enhancing lithium leaching by mechanical activation 机械活化强化锂浸出
Q4 Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1090
Nader Setoudeh, A. Nosrati, N. Welham
The lithium (Li) bearing minerals lepidolite and spodumene were mixed with different mass ratios of Na2SO4 and mechanically activated by milling in a planetary ball mill for 5 h. The milled samples were studied using thermogravimetry under an air atmosphere up to 950 ºC. Isothermal heating of the milled samples was undertaken in a furnace at temperatures of 700 ºC and 800 ºC for 1 h. Hot water leaching of the calcines indicated that increasing the calcination temperature had a significant effect on the dissolution of lithium. The leaching of lithium from lepidolite was notably higher than that from spodumene.
将含锂矿物锂云母和锂辉石与不同质量比的Na2SO4混合,并通过在行星球磨机中研磨5小时进行机械活化。在高达950ºC的空气气氛下使用热重分析法研究研磨的样品。在700ºC和800ºC的熔炉中对研磨样品进行等温加热1小时。煅烧物的热水浸出表明,提高煅烧温度对锂的溶解有显著影响。锂云母对锂的浸出率明显高于锂辉石。
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引用次数: 6
Leaching of a Mongolian chalcopyrite concentrate 蒙古黄铜矿精矿的浸出
Q4 Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1082
N. Welham, J. Temuujin, Nader Setoudeh
A Mongolian chalcopyrite flotation concentrate was leached using sodium hypochlorite adjusted to different pH using hydrochloric acid. It was found that using a starting pH of below 5.0 resulted in more efficient leaching. The extent of chalcopyrite leaching was determined by the concentration of sodium hypochlorite with > 40% dissolution being achieved. The residue after leaching was found to consist primarily of unreacted chalcopyrite which would be suitable for further leaching or smelting.
用次氯酸钠对蒙古黄铜矿浮选精矿进行浸出,用盐酸将次氯酸钠调节到不同的pH值。发现使用低于5.0的起始pH导致更有效的浸出。黄铜矿浸出的程度由次氯酸钠的浓度决定,溶解率>40%。浸出后的残留物主要由未反应的黄铜矿组成,适合进一步浸出或冶炼。
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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
Q4 Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1084
B. Buyan-Ulzii, Odbayar Daariimaa, Chuluunsukh Munkhdelger, G. Oyunbileg, B. Enkhsaruul
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.
本工作研究了阴离子前体对合成气甲烷化活性和精细镍金属催化剂制备的影响。采用浸渍共沉淀法制备镍催化剂。以Ni(NO3)2·6H2O、NiSO4·6H2O和NiCl2·6H_2O的水合镍盐为金属催化剂前驱体,得到的催化剂分别命名为Ni/Al(N)、Ni/Al。一氧化碳的甲烷化合成在固定床不锈钢反应器中进行。在实验之前,将催化剂粉末压制成片剂,然后粉碎并过筛以使用0.5-0.9mm的颗粒。反应在350°C的温度下,在3个大气压的H2:CO合成气(摩尔比为3:1)的压力下进行,GHSV为3000 h-1。在目前的甲烷化条件下,Ni/Al(N)、Ni/Al(S)和Ni-Al(Cl)催化剂的CH4选择性分别为93%、18%和91%(体积)。XRD和ICP-OES分析表明,尽管Ni/Al(S)催化剂含有与其他两种催化剂相似的17.4wt%的镍量,但其金属分布较差。此外,Ni/Al(S)催化剂的低活性是由硫酸盐前体中残留的硫污染引起的。该工作还考察了合成前催化剂活化温度的影响。在350℃、400℃或450℃的不同温度下,用纯氢气还原Ni/Al(N)催化剂。在400ºС下活化的催化剂在甲烷化1小时内产生最高的CH4量0.087 mmol·g-1cat。在三种催化剂中,在400℃下活化的Ni/Al(N)催化剂的甲烷形成初始温度最低。
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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。
Q4 Chemistry Pub Date : 2018-12-28 DOI: 10.5564/MJC.V19I45.1088
Uugangerel Erdenetsogt, Choijamts Gotov, K. Voigt, S. Bartram, W. Boland, Enkhmaa Dagvadorj
The chemical composition and antimicrobial activity of the essential oil from the aerial parts of Pyrethrum pulchrum Ledeb. were investigated. Dried plant material was hydro-distillated yielding 0.1% of essential oil. The oil was analyzed by GC-MS techniques. Fifty-five compounds were identified representing 99.7% of the total oil composition. Camphor was the predominant compound (33.9%) followed by linalool (21.1%) and α-pinene (9.0%). The antimicrobial activity of the oil was determined using the disk diffusion method against Gram-positive bacteria (Bacillus subtilis, Staphylococcus aureus and Enterococcus faecalis), Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli), Mycobacterium vaccae and fungi (Candida albicans, Sporidiobolus salmonicolor and Penicillum notatum). The essential oil of P. pulchrum displays an intermediate activity against selected bacteria.
除虫菊地上部挥发油的化学成分及抑菌活性。被调查。干燥的植物材料被加氢蒸馏,得到0.1%的精油。采用气相色谱-质谱分析。鉴定出55种化合物,占总油成分的99.7%。主要化合物为樟脑(33.9%),其次为芳樟醇(21.1%)和α-蒎烯(9.0%)。采用圆盘扩散法测定其对革兰氏阳性菌(枯草芽孢杆菌、金黄色葡萄球菌和粪肠球菌)、革兰氏阴性菌(铜绿假单胞菌和大肠杆菌)、牛分枝杆菌和真菌(白色念珠菌、沙门氏菌孢子虫和青霉菌)的抑菌活性。白杨挥发油对选定细菌具有中等活性。
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引用次数: 4
期刊
Mongolian Journal of Chemistry
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