Coumarins of Angelica deccurens

It was shown that the plant Angelica deccurens (Ldb.) B. Fedtsch might be serve as a source of valuable coumarins. Five linear furocoumarins – umbelliferon, isoimperatorin, imperatorin, psoralen and oxypeucedanin have been isolated from the roots of Angelica deccurens (Ldb.) B. Fedtsch growing in Mongolia. Molecular structures of these compounds were elucidated by spectroscopic methods. The coumarin psoralen has been isolated for the first time from this plant. DOI: http://dx.doi.org/10.5564/mjc.v14i0.193 Mongolian Journal of Chemistry 14 (40), 2013, p25-2

Comparison of hematological and histological analysis of "Clinomon" and "Litovit-M" in mice

DOI: http://dx.doi.org/10.5564/mjc.v13i0.157 Mongolian Journal of Chemistry Vol.13 2012: 31-3

Antioxidative activity of Silibum marianum cultivated in Mongolia

Silibum marianum (Milk thistle) contains high amount of phenolic compounds with antioxidant properties. The aim of this work was to evaluate the antioxidant activity of  phenolic compounds included in Milk thistle. The  antioxidant properties of the leaves and seeds of milk thistle were examined by determining its ability to scavenge the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical. The results obtained from DPPH assay confirm that Milk thistle extracts have high antioxidative activity.DOI: http://doi.dx.org/10.5564/mjc.v15i0.323 Mongolian Journal of Chemistry 15 (41), 2014, p53-5

Coumarins from Peucedanum hystrix growing in Mongolia

It is proved to be that of genus Peucedanum hystrix serve as a source of biologically valuable natural coumarins. Nine angular furocoumarins belonging to class of 2'-substituted and 2',3'-disubstituted 2',3'-dihydrofurocoumarins have been isolated and structurally isolated. For peucenidin data of X-ray analysis is obtained.DOI: http://dx.doi.org/10.5564/mjc.v12i0.170 Mongolian Journal of Chemistry Vol.12 2011: 42-4

Residual characteristics of HCHs and DDTs in soil and dust of some parks in Ulaanbaatar, Mongolia

The residual characteristics of HCHs and DDTs in park soils and dusts in Ulaanbaatar, Mongolia were determined by GC-ECD to evaluate their potential pollution risk. The residual concentrations of total HCHs and DDTs in the park soil samples were ranged in 11.36-53.14 ng·g-1 and 11.96-24.70 ng·g-1 while it was ranged in 32.28-92.68 ng·g-1 and 13.45-24.41 ng·g-1 in the park dust samples, respectively. We have studied the ratio of α-HCH/γ-HCH in order to determine pollution sources which may come from either technical HCHs or lindane. The study revealed that concentration of DDTs in soil has direct correlation on usage rate of the dicofol and technical DDT in the sampling area. The soil pollution assessments based on the single pollution index of HCHs and DDTs indicated that Ulaanbaatar city’s park soil and dust were not polluted with these compounds.The single pollution index of HCHs reached to 1.85 in A park dust samples，indicating the park dust environment was potentially polluted. DOI: http://doi.dx.org/10.5564/mjc.v15i0.315 Mongolian Journal of Chemistry 15 (41), 2014, p15-2

Coumarins of Peucedanum baicalense and cytotoxic activity of some isolated coumarins

DOI: http://dx.doi.org/10.5564/mjc.v13i0.155 Mongolian Journal of Chemistry Vol.13 2012: 23-2

СИНТЕЗ И СВОЙСТВА БИОАКТИВНЫХ ОРГАНОМИНЕРАЛЬНЫХ КОМПОЗИТОВ ДЛЯ ЗАЩИТЫ КЕРАМИЧЕСКИХ ФИЛЬТРУЮЩИХ МАТЕРИАЛОВ

The method of obtaining hybrid organic biocidal structures through the interaction of the guanidine base with alumophosphates and copper hydroxy carbonate has been described. It is established that the reaction products consist of tripolyphosphates and pyrophosphates of aluminum forming ionic bonds with polyhexamethylene guanidine ions and copper (II). It is shown that when applied to the surface of a ceramic filter element at a temperature of 170 °C, a biocidal composite is fixed on them, on average, amounting to 50.0 wt. % of a product that provides the protection of filters from biofouling.Описан метод получения «гибридных» органоминеральных биоцидных структур путем взаимодействия основания полигексаметиленгуанидина с алюмофосфатами и гидрокарбонатом меди. Установлено, что продукты реакции состоят из триполифосфатов и пирофосфатов алюминия, образующих ионные связи с полигексаметиленгуанидином и ионами меди (II). Показано, что при нанесении на поверхности керамических фильтроэлементов при температуре 170 °С биоцидного композита на них закрепляется в среднем 50,0 масс. % продукта, обеспечивающего защиту фильтров от биообрастания