Proceedings of the Mongolian Academy of Sciences最新文献_第6页

Three species of heterodermia recorded in Mongolia 蒙古记录的异皮蝇三种

Proceedings of the Mongolian Academy of Sciences Pub Date : 2019-04-26 DOI: 10.5564/PMAS.V59I1.1138

E. O, Javkhlan S

引用次数: 0

Employee training in small and medium-sized enterprises in Mongolia 蒙古国中小企业员工培训

Proceedings of the Mongolian Academy of Sciences Pub Date : 2019-04-26 DOI: 10.5564/PMAS.V59I1.1140

Tuul O, Shaoda Bing

引用次数: 6

Icing phenomena for managed aquifer recharge (MAR) and it’s feflow simulation result 含水层管理补给的结冰现象及其流量模拟结果

Proceedings of the Mongolian Academy of Sciences Pub Date : 2019-04-26 DOI: 10.5564/PMAS.V59I1.1134

Nasanbayar N

{"title":"Icing phenomena for managed aquifer recharge (MAR) and it’s feflow simulation result","authors":"Nasanbayar N","doi":"10.5564/PMAS.V59I1.1134","DOIUrl":"https://doi.org/10.5564/PMAS.V59I1.1134","url":null,"abstract":"Ulaanbaatar, the capital of Mongolia, shows a highly dynamic urban and industrial development, with a strong increase of population. Thus, water demand is continuously rising while water availability is in general low and less reliable. The semi-arid and cold environment shows a high variability in precipitation and river discharge, with a general tendency towards decreasing water availability due to increasing air temperatures and thus rising potential evaporation. In parallel with the city’s development, the extended groundwater aquifer shows a clear decline, and the groundwater levels drop significantly. Therefore, a groundwater management system based on managed aquifer recharge is proposed and a strategy to implement these measures in the Tuul valley is presented. In this study considered enhancement of natural recharge rates during the early winter cold period, an increase of groundwater recharge through creating ice storages, due to keep water source as in ice form on surface. In dry season March to May ice storage recharge surface and groundwater by melting where Tuul River is non-flow condition. In this paper also written matlab icing code in water supply wells location, limited and unlimited area. The study of icing was processed in feflow simulation scenarios for artificially recharging groundwater resources.In this study considered feflow simulation scenarios for artificially recharging groundwater resources like enhancement of natural recharge rates during the early winter cold period, an increase of groundwater recharge through creating ice storages, due to keep water source as in ice form on surface, drainage canal recharging aquifer from opposite side, constructing underground dam that accumulates groundwater behind. The result shown that one of the possibilities recharge groundwater in dry season is icing method which creates ice sheets over ice and build ice storages in winter, keep water in ice form.","PeriodicalId":32573,"journal":{"name":"Proceedings of the Mongolian Academy of Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45320892","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

A hydrometallurgical process for the recovery of cerium from Khuren khad ore 一种从库伦喀德矿石中回收铈的湿法冶金工艺

Proceedings of the Mongolian Academy of Sciences Pub Date : 2019-04-26 DOI: 10.5564/PMAS.V59I1.1135

Sandagdorj N, E. B., Ching-Hwa Lee, G. E., Terbish N

引用次数: 0

Studies of kinetics and thermodynamic parameters of cashmere dyeing with bio-preparation of Urtica Cannabina L, 大麻酚生物制剂染色羊绒的动力学和热力学参数研究，

Proceedings of the Mongolian Academy of Sciences Pub Date : 2019-04-26 DOI: 10.5564/PMAS.V59I1.1133

T. S, Ganchimeg Yu, N. G, Soyol-Undrakh. Kh

引用次数: 0

Phylogenetic analysis of mitochondrial 12S ribosomal RNA gene sequence of Mongolian wild boars 蒙古野猪线粒体12S核糖体RNA基因序列的系统发育分析

Proceedings of the Mongolian Academy of Sciences Pub Date : 2018-12-31 DOI: 10.5564/PMAS.V58I4.1051

Ali Khamit, Bayarmaa Gun-Aajav, Oyuntsetseg Dashzeveg, Shinebayar Batsuuri, Enkhmaa Shiikhar, Bayarlkhagva D

{"title":"Phylogenetic analysis of mitochondrial 12S ribosomal RNA gene sequence of Mongolian wild boars","authors":"Ali Khamit, Bayarmaa Gun-Aajav, Oyuntsetseg Dashzeveg, Shinebayar Batsuuri, Enkhmaa Shiikhar, Bayarlkhagva D","doi":"10.5564/PMAS.V58I4.1051","DOIUrl":"https://doi.org/10.5564/PMAS.V58I4.1051","url":null,"abstract":"Specimens of Mongolian wild boar (Sus scrofa) from Arkhangai, Dornod, Zavkhan, Orkhon, Ovorkhangai, Selenge, Tuv, Khovd, Khuvsgul and Uvs aimags (provinces) were subjected to DNA sequencing. Determined sequences from 18 specimens were registered into the GenBank and accession numbers were obtained. In this study mitochondrial 12S rRNA gene sequences of Mongolian wild boars were analyzed with 36 complete sequences of 12S rRNA gene of wild boar (Sus scrofa) available at NCBI GenBank. Sequence alignment, detection of parsimonious informative sites, model selection, calculation of nucleotide distances and tree construction with 1000 bootstrapped replications were conducted using MEGA 6. Maximum likelihood trees were constructed by the HKY model. A maximum likelihood tree with 53 complete sequences of mitochondrial 12S rRNA gene of Sus scrofa was constructed. Mongolian sequences from the same and adjacent locations were clustered together. \u0000European sequences were clustered together, additionally two sequences from south western China and two sequences from south eastern China were also clustered. Additionally, 12S rRNA gene sequences of Mongolian Sus scrofa, located between Asian and European sequences suggesting geographical location of Mongolia, played an important role in the gene flow between Asian and European wild boar population.","PeriodicalId":32573,"journal":{"name":"Proceedings of the Mongolian Academy of Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44374262","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: 0

Property of upgraded solid and liquid products from Baganuur lignite by thermal reaction with solvent 巴甘奴尔褐煤与溶剂热反应升级固液产物的性质

Proceedings of the Mongolian Academy of Sciences Pub Date : 2018-12-31 DOI: 10.5564/PMAS.V58I4.1048

A. A, O. D, Purevsuren B, Davaajav Ya

引用次数: 2

Selection of culture media for the production of carotenoids with antioxidant activity by Rhodotorula glutinis 粘红酵母生产具有抗氧化活性类胡萝卜素的培养基选择

Proceedings of the Mongolian Academy of Sciences Pub Date : 2018-12-31 DOI: 10.5564/PMAS.V58I4.1047

G. Z, Zultsetseg Ch, B. B, Rentsenkhand Ts

{"title":"Selection of culture media for the production of carotenoids with antioxidant activity by Rhodotorula glutinis","authors":"G. Z, Zultsetseg Ch, B. B, Rentsenkhand Ts","doi":"10.5564/PMAS.V58I4.1047","DOIUrl":"https://doi.org/10.5564/PMAS.V58I4.1047","url":null,"abstract":"Rhodotorula glutinis is an aerobic yeast with particular metabolic characteristic that can produce large amount of carotenoids during the stationary growth phase. Carotenoid is an important natural pigment with antioxidant properties, which is used in food, pharmaceutical and cosmetics industry as additives. The aim of this work is to study the production of carotenoid with antioxidant activity by R.glutinis R12 in different media conditions. The selected strain was cultivated in three different culture media such as YM broth, Basal and MS3 medium at 28°C for 72–120 hours. After fermentation, cells were harvested by centrifugation and freeze-dried. Carotenoid from the biomass was extracted as a mixture of DMSO, acetone and petroleum ether with a ratio of 1:2:2 and cells were ruptured using ultrasonic wave. The carotenoid content in the supernatant was measured by spectrophotometric method. The highest content of carotenoids extracted from R.glutinis R12 was 283.71µg/g dry biomass. The maximum antioxidant activity of carotenoid by DPPH assays were achieved 52.09 ± 0.4% (IC50= 536.02) and at a concentration of 600 µg ml-1. This study revealed that the R.glutinis R12 strain has the ability to produce carotenoid and has shown antioxidant activity in Basal and MS3 medium. For further study, it is necessary to investigate the improvement of carotenoid yield from R.glutinis R12 strains.","PeriodicalId":32573,"journal":{"name":"Proceedings of the Mongolian Academy of Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43628441","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

The efficiency forecast of trilateral transit transportation of economic corridor 经济走廊三边过境运输效率预测

Proceedings of the Mongolian Academy of Sciences Pub Date : 2018-12-31 DOI: 10.5564/PMAS.V58I4.1054

Zolboo Gansukh

{"title":"The efficiency forecast of trilateral transit transportation of economic corridor","authors":"Zolboo Gansukh","doi":"10.5564/PMAS.V58I4.1054","DOIUrl":"https://doi.org/10.5564/PMAS.V58I4.1054","url":null,"abstract":"The development basis of a country is human capital which follows the transportation and infrastructure issues. In particular, landlocked countries with fewer neighbours ought to create transit transportations with its bordering countries that could help to reduce transportation costs, develop economies, transportation and tourism with neighbours, as well as promote regional economic relations and cooperation. An efficient transit transport is vital for landlocked states. Due to the lack of access to seaports, transit transportation is a unique way to connect with the neighbouring countries. Mongolia’s geographical location, the rapid development of the mining and energy sectors are critically important for connecting with the “New Silk Road”, the “Development Road National Programme” (former Steppe Road) and the “Eurasian Transportation Corridor”. This paper is an attempt to forecast the efficiency of transit transport between Mongolia, China and Russia. The article focuses on the prerequisites for the development of the methodology for measuring the transit transport performance. Mongolia-China-Russia economic corridor marks a watershed in intensifying trilateral cooperation between Mongolia, China and Russia, which would not only create favorable conditions for furthering trilateral cooperation, but also promoting regional economic cooperation. Therefore, the paper has used Mongolian Railway statistical data of 2017 to provide efficiency analysis of the central railway system. A total of four types of railway transportation is carried out in Mongolia and transit transportation is relatively efficient. The efficiency calculation and performance of transport system of Mongolia were measured using the Data Envelopment Analysis.","PeriodicalId":32573,"journal":{"name":"Proceedings of the Mongolian Academy of Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43460459","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: 0

Results of assessment of the competitiveness ranking of Mongolia’s tourism destination 蒙古国旅游目的地竞争力排名评价结果

Proceedings of the Mongolian Academy of Sciences Pub Date : 2018-12-31 DOI: 10.5564/PMAS.V58I4.1052

Khishigdalai Ulaankhuu, Bat-Erdene Nyandag

引用次数: 2