In oil recovery technique using SiO2 nanoparticles, evaluating the transportability of the nanoparticles in various sandstones contributes to controls of fluid behaviour in petroleum reservoirs and improvement of oil recovery factor. In the core flooding test with high-content kaolinite sandstones, the...

Future generations of electronic products will be enabled by flexible electronic circuits, displays, and sensors based on organic active materials, which could eventually reach the mainstream electronics industry. One of such devices is the organic field-effect transistor (OFET), which are three-terminal...

In this study, the adsorption of hazardous atoms including lead on the silica surface (SiO2 [001]) was investigated using the first-principles method within the framework of density functional theory (DFT). We performed the full structural optimization and found the most stable configuration. Four different...

The angiotensin-converting enzyme (ACE) inhibitory activity and antioxidant property of collagen and elastin hydrolysates, and their peptide fractions (< 5 kDa, 5-10 kDa, 10-100 kDa) were compared. The bovine raw-hide and paddywhack (Ligamentum nuchae) were used for the preparation of collagen and...

The purpose of the present work was to perform a screening for SOD activity in plants traditionally used as food and medicine in Mongolia. The SOD activity was measured by their effects on pyrogallol autoxidation. In the studied plants, the SOD activity varied from 0.42±0.01 to 10.47±0.1 U/mg protein....

We have defined the biochemical composition of the carcass meat of muskrat, including the content of the amino acids, lipids, and saturated and unsaturated fatty acids. The moisture, crude proteins, fatty acid, and ash were 74.6, 23.2, 1.2, and 0.92%, respectively. The average amount of calories was...

The sheep (Ovis aries) tail tendons are the major by-products after being slaughtered for food consumption. A tendon is a powerful band of fibrous connective tissue that is composed of parallel bundles of collagen fibers and connects muscle to bone, due to the transmit forces and tolerate tension during...

Sea buckthorn (Hippophae rhamnoides L.) oil is a unique oil source, emphasizing its potential as a dietary and medicinal supplement. Many studies have shown that the whole berry oil of sea buckthorn is rich in saturated and unsaturated fatty acids and fat-soluble vitamins. The oil also had been used...

The purpose of the study was to determine chemical and organic matter compositions of peloid from Lake Khyargas in Uvs province by chemical and instrumental methods, including X-ray, ICP–OES, and GS/MS. Based on our results, it was identified that the peloid from Lake Khyargas belongs to hydrogen sulfide...

Chlorophylls (Chls), the green pigments responsible for photosynthesis in plants, algae and bacteria, are also part of the daily diet of herbivorous feeders. Chl degradation occurs during leaf senescence and fruit ripening but is also noticed as a response to biotic and abiotic stresses. Besides the...

Determining vertical variation of water quality parameters is contributed to a better understanding of the true nature of lakes. Lakes are classified into holomictic and meromictic lakes by their mixing mode; the former occurs physico-chemical mixing between the surface and deep waters, while the latter...

Biochar is a product of thermal degradation of organic materials in the absence of air (pyrolysis). Slow-pyrolyzed and biowaste-derived biochars show excellent adsorption properties. Studies on biochars produced from pine nut shells, sawdust, and cow dung have been carried out in Mongolia determining...

Mongolia has few freshwater resources. It is therefore important to conserve water resources. An efficient possibility is to purify water and reuse it. Therefore, the scientists from the Material Science Center of the Mongolian University of Science and Technology collaborated with the researcher from...

Groundwater is not a nutrient-rich environment for microorganisms to grow and thrive, but it is polluted by many environmental factors. These nutrients can exceed the permissible levels in drinking water and can be a reason for spreading highly infectious diseases in the population. Therefore, there...

Russia, China and, Mongolia are among the countries having large reserves of coals which are traditionally utilized mainly as a fuel for energy generation. In the present paper, the solvolysis of a large series of different-ranked coals from various deposits of Russia and Mongolia in anthracene oil as...

The paper presents data on the yield, chemical composition of bitumen extracted from the brown coal of the Tyulgan deposit. Bitumens were extracted from brown coal by the following methods: I) sequential extraction with ethanol, n-heptane, alcohol-benzene according to the Grefe method, II) low-temperature...

This study reports the technical characteristics, the organic elemental composition of coal, and the inorganic elemental composition of coal ashes from four selected coals including Tavan tolgoi, Nariin sukhait, Baganuur and Shivee-Ovoo deposits in Mongolia. The thermal stability analyses of the organic...

Hydrocarbons represent an important natural resource for the rehabilitation and sustainable development of Afghanistan. In this paper, the use of waterflooding is demonstrated for the petroleum reservoirs of the Kashkari oilfield in northern Afghanistan. The technique stands on the Buckley–Leverett frontal-displacement...

Cracking is the complex physical and chemical process of converting high molecular hydrocarbons into valuable products such as gasoline fraction and light fuel fraction. There are several oil fields in Mongolia and three large deposits already are being exploited. The crude oil was classified as high-paraffinic...

In this study, the various organic extractants, namely D2EHPA, PC-88A, TBP, TBPP, TOA, and TOPO, were examined to extract REEs from sulphuric acid leach liquor of apatite ore. Extraction parameters including extractants type, the concentration of extractant, organic to aqueous phase ratio, and contact...

In this study, the sorptions of Cu(II), Pb(II), and Cr(VI) on amine-functionalized activated carbon were investigated. Coal from the Tavantolgoi deposit of Mongolia was used as a precursor for the modification. After the coal carbonization, the char was activated with heated steam at different times...

The beneficiation of low-grade manganese ore is investigated using applied magnetics separation, multi-gravity separator, shaking table, flotation methods, and sulfuric acid leaching. The manganese content in the ore sampled from the Unagad deposit is 17.31%. The best option and high result among beneficiation...

The gas-based direct reduction of iron concentrate pellets was carried out by using the typical carbon monoxide. The investigation on the influences of time and temperature of the reduction were studied. The results showed that the temperature and time of the reduction were directly related to the reduced...

In the original paper, the Acknowledgments section is missing. The completed Acknowledgments section appears below. The authors are sorry for any inconveniences caused by this error. DOI of original paper: https://doi.org/10.2991/ahcps.k.211004.012

In the original paper, the Acknowledgments section is missing. The completed Acknowledgments section appears below. The authors are sorry for any inconveniences caused by this error. DOI of original paper: https://doi.org/10.2991/ahcps.k.211004.018