It was investigated the qualitative and quantitative composition of monosaccharides glycoprotein (GP) of gastric parietal layer of protective mucus in the normal, at the modeling stress ulcer in rats and at the introd...
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It was investigated the qualitative and quantitative composition of monosaccharides glycoprotein (GP) of gastric parietal layer of protective mucus in the normal, at the modeling stress ulcer in rats and at the introduction of bionanocomposite to experimental animals. In analyzing the content of glycoproteins monosaccharides of the protective mucus we found that under conditions of stress ulcer model in the mucus of the stomach, a decrease 2.2 times galactose, fucose 1.3 times, 1.8 times hexosamines. It was seen an increase in N-acetylneuraminic acid in 3.6 times, which may be indicated the depolymerization of glycoproteins. The new biocomposite was created to maximize the using of biologically active substances Trigonella foenum graecum seeds were transferred to highly dispersed state by immobilization on the surface nanosilex. of biocomposite stress-affected rats showed the normalization of the composition glycoproteins" monosaccharides of gastric parietal mucous layer.
油气资源勘探开发面临投资成本高、风险高、不确定性等诸多问题,传统的油气资源经济评价方法有净现值法、级差地租(矿利)法、储量成本法以及未广泛使用的勘察费用倍数法等,近年来国际上涌现了新的经济评价方法——能源投资回报(Energy Return on Investment)方法,这些方法在油气资源经济评价过程中各有优劣。从能源经济评价的理论和方法角度,阐述了净现值法和能源投资回报方法在实际应用中的优点和不足。在国际油气项目开发经济评价案例中,应该综合各种经济评价方法的优点,规避缺陷,建立动态的经济评价体系,为油气资源开发的时间选择、最佳开发方式、环境社会影响等重要投资决策提供科学依据。
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