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

Removal of Cr 3+ by electrocoagulation from simulated wastewater

Trivalent chromium (Cr3+) removal from aqueous solution  by electrocoagulation using iron electrodes material was investigated in this paper. Effects of current density, initial concentration of Cr 3+, operating time,  pH, electrode distance, and operating cost have been investigated. At higher current density and solution pH, remarkable removal of Cr3+ was observed. Experiments have been show that the maximum removal percentage of the Cr3+ 99.89 % was at initial concentration 1000mg/L,  current density 9.34mA/cm2 and reaction time 1 hours. Energy consumption was calculated  for Cr3+ removal at different time. The method is observed to be very effective in the removal Cr3+ ion from aqueous solution. Electrocoagulation process need simple equipment, designable any size, use any chemical substances and low operating cost.DOI: http://doi.dx.org/10.5564/mjc.v15i0.330 Mongolian Journal of Chemistry 15 (41), 2014, p89-9

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

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

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

Gastric Microbiota in <i>Helicobacter pylori</i>-Negative and -Positive Gastritis Among High Incidence of Gastric Cancer Area

Helicobacter pylori (H. pylori) related chronic gastritis is a well-known major etiological factor for gastric cancer development. However, H. pylori-negative gastritis (HpN) is not well described. We aimed to examine gastric mucosal microbiota in HpN compared to H. pylori-positive gastritis (HpP) and H. pylori-negative non-gastritis group (control). Here, we studied 11 subjects with HpN, 40 with HpP and 24 controls. We performed endoscopy with six gastric biopsies. Comparison groups were defined based on strict histological criteria for the disease and H. pylori diagnosis. We used 16S rRNA gene amplicon sequencing to profile the gastric microbiota according to comparison groups. These results demonstrate that the HpP group had significantly lower bacterial richness by the operational taxonomic unit (OTU) counts, and Shannon and Simpson indices as compared to HpN or controls. The linear discriminant analysis effect size analysis showed the enrichment of Firmicutes, Fusobacteria, Bacteroidetes and Actinobacteria at phylum level in the HpN group. In the age-adjusted multivariate analysis, Streptococcus sp. and Haemophilus parainfluenzae were at a significantly increased risk for HpN (odds ratio 18.9 and 12.3, respectively) based on abundance. Treponema sp. was uniquely found in HpN based on occurrence. In this paper, we conclude that Streptococcus sp., Haemophilus parainfluenzae and Treponema sp. are candidate pathogenic bacterial species for HpN. These results if confirmed may have important clinical implications