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Investigation of the effect of hydrocarbons and monoesters in the gelators’composition on the properties of edible oleogel

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Grain & Oil Science and Technology 2024年第2期7卷 96-104页

作者： Yuliya Frolova Roman Sobolev Varuzhan Sarkisyan alla kochetkova Federal Research Centre of Nutrition Biotechnology and Food Safety2/14 Ustyinsky ProyezdMoscow 109240Russia

Natural wax gelators have different compositions of compounds(hydrocarbons,wax esters,free fatty alcohols,and free fatty acids),which results in oleogels with varying *** maintain a consistent composition,the individual components can be added to the original wax *** content of hydrocarbons and wax esters greatly affects the structuring process of liquid edible oils with *** aim of this study was to evaluate the possibility of modifying the properties of beeswax as a gelling agent by adding hydrocarbons or monoesters to obtain oleogels with specific *** tests were conducted to assess the changes in the oleogel properties,such as color,microstructure,oil-binding capacity,thermal and textural *** research results have shown that the addition of the studied fractions has led to a significant change in all properties of *** initial size of oleogel crystals(7.29±1.80μm)changed after adding fractions,varying from 5.28μm to 12.58μm with hydrocarbons and from 9.95μm to 30.41μm with wax *** addition of 30%–50% hydrocarbons decreased the ability of the oleogels to bind oil and made them less firm compared to samples with 10%-20% *** 10%-20% monoesters increased the firmness of the oleogels,but this indicator decreased when their content was increased to 50%.The obtained data indicate that hydrocarbons and wax esters can be used for targeted correction of the gelling properties of beeswax.

关键词： Oleogel Beeswax Hydrocarbons Wax monoesters Component composition of gelator Textural properties Food

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Effect of beeswax and combinations of its fractions on the oxidative stability of oleogels

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Food Bioscience 2022年第4期48卷 273-282页

作者： R.Sobolev,Yu Frolova V.Sarkisyan M.Makarenko A.kochetkova Federal Research Centre of Nutrition Biotechnology and Food Safety2/14 Ustyinsky ProyezdMoscow109240Russia

Beeswax can be a good structuring agent for edible *** is controversy about its role in the oleogel oxidation *** study investigated the oxidative stability of oleogels and the impact of their composition and texture on this *** were created by structuring sunflower oil with beeswax or combinations of its fractions(6%w/w gelator).Preparative flash chromatography was used to obtain beeswax fractions,which had a diverse composition according to TLC and HPLS-ELSD(hydrocarbons,wax esters,free fatty acids,and alcohols).Different oxidation indices(PV,AV,CDV,TOTOX,volatile organic compounds)of oleogels were evaluated,as well as their textural properties(firmness and Young’s modulus)after 20 days of storage at 35◦*** the tested samples,unstructured sunflower oil demonstrated the highest oxidative *** sample based on hydrocarbons and monoesters was the most stable of the oleogels *** is the most common volatile organic molecule generated during the oxidation of sunflower *** have a more complex profile of volatile compounds,including ketones,alcohols,and *** based oleogel’s induction period was the *** oxidation rate of oleogels and Young’s modulus(r2=0.9511,negative),as well as the concentration of free fatty acids(r2=0.8195,positive)had a strong *** results show that oleogels structured with beeswax fractions could be beneficial in fat-containing products with improved oxidation resistance.

关键词： Oleogel Beeswax Fractions of beeswax Oxidative stability Texture Correlation

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Role of Osteoprotegerin and Receptor Activator of Nuclear Factor-kB Ligand in Bone Loss Related to Advanced Chronic Obstructive Pulmonary Disease

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Chinese Medical Journal 2016年第14期129卷 1696-1703页

作者： Ludmila Ugay Evgenia kochetkova Vera Nevzorova Yuliya Maistrovskaia Departement of Pulmonology Central Scientific Research Laboratory Pacific State Medical University Vladivostok 690950 Russian Federation

Background： Osteoporosis is a common complication of chronic obstructive pulmonary disease （COPD）. Recent clinical and biological researches have increasingly delineated the biomolecular pathways of bone metabolism regulation in COPD. We extended this work by examining the specific association and potential contribution of the osteoprotegerin （OPG）/receptor activator of nuclear factor-riB ligand （RANKL） axis to the pathogenesis of osteoporosis in advanced COPD. The aim of this study was to assess the relationships of serum OPG, RANKL, and tumor necrosis factor-alpha （TNF-a） with bone turnover in men with very severe COPD. Methods： Pulmonary function, T-score at the lumbar spine （LS） and femoral neck （FN）, serum OPG, RANKL, soluble receptor of tumor necrosis factor-alpha-1 and 11 （sTNFR-I, sTNFR-II）, osteocalcin （OC）, and β-CrossLaps （βCL） levels were measured in 45 men with very severe stage COPD and 36 male non-COPD volunteers. COPD patients and healthy controls were compared using all independent t-test and Mann-Whitney U-test. The Pearson coefficient was used to assess the relationships between variables. Results： OPG and OC were lower in male COPD patients than in control subjects whereas RANKL, serum ~CL, TN F-o~, and its receptors were higher. OPG directly correlated with forced expiratory volume in I s （FEVI） % predicted （r = 0.46, P 〈 0.005）, OC （r= 0.34, P 〈 0.05）, LS （I.= 0.56, P 〈 0.001 ）, and FN T-score （r= 0.47, P 〈 0.01 ）. In contrast, serum RANKL inversely associated with LS and FN T-score （r = -0.62, P 〈 0.001 and r = -0.48, P 〈 0.001 ） but directly correlated with [3CL （r = 0.48, P 〈 0.001 ）. In addition, OPG was inversely correlated with RANKL （r = -0.39, P 〈 0.01 ）, TNF-a （r = -0.56, P 〈 0.001 ）, and sTNFR-I （r = -0.40, P 〈 0.01 ）. Conelusion： Our results suggest that serum OPG and RANKL levels are inversely associated with bone loss in men with advanced stage COPD.

关键词： Chronic Obstructive Puhnonary Disease Osteoporosis Osteoprotegerin Receptor Activator of Nuclear Factor-KBLigand Tumor Necrosis Factor Receptors: Tumor Necrosis Factor-alpha

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The Determinants of Chinese Outward Real Estate Investment

The Determinants of Chinese Outward Real Estate Investment

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作者： Olga kochetkova 东南大学

学位级别：硕士

过去几年来，中国已成为世界上最大的投资者之一。但是,中国对外投资的研究还不多。本文重点分析了中国对外投资及其决定因素。重要的是找出什么推动中国投资在国外的房地产。为什么国内市场没有那么有吸引力。我们将讨论外国直接投资... 详细信息

过去几年来，中国已成为世界上最大的投资者之一。但是,中国对外投资的研究还不多。本文重点分析了中国对外投资及其决定因素。重要的是找出什么推动中国投资在国外的房地产。为什么国内市场没有那么有吸引力。我们将讨论外国直接投资流入目的地、行业趋势和重点国家的主要因素。本文采用OSL回归，涵盖了2007年至2015年期间的24个国家的数据。模型变量是GDP,人均国内生产总值、距离、货款利率、文化相似性、国际投资协议和具体的透明度，我们考虑发挥主要作用。

关键词：外商直接投资影响因素面板回归

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