Journal of Siberian Federal University. Chemistry最新文献_第7页

The Influence of the Reaction Conditions on the Size of Silver Nanoparticles in Carey Lea’s Concentrated Sols 反应条件对Carey Lea 's浓缩溶胶中银纳米粒子尺寸的影响

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-09-01 DOI: 10.17516/1998-2836-0190

S. Vorobyev, Maksim N. Likhatski, A. Romanchenko, Timur Y. Ivanenko, Diana A Masharova, M. Volochaev, Y. Mikhlin

引用次数: 0

Influence Different Methods of Mechanical Activation on Yield Extractive Substances from Pine Bark 不同机械活化方法对松皮萃取物得率的影响

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-09-01 DOI: 10.17516/1998-2836-0196

E. V. Veprikova, V. A. Ionin, M. Belash, A. M. Skripnikov, A. V. Levdanskii, O. Taran

引用次数: 1

Adsorption-Photometric and Test-Determination of Fe(III) in Natural Water Using Silica Lyer-by-Lyer Modified with Polyhexamethylene Guanidine and Ferron 用聚六亚甲基胍和铁改性二氧化硅逐层吸附光度法测定天然水中的铁(III)

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-09-01 DOI: 10.17516/1998-2836-0188

S. Didukh-Shadrina, O. Buyko, V. Losev

引用次数: 1

Depolymerization of Pine Ethanol Lignin in the Medium of Supercritical Ethanol in the Presence of Catalysts NiCu/SiO₂ and NiCuMo/SiO₂ NiCu/SiO₂和NiCuMo/SiO₂催化剂作用下松树乙醇木质素在超临界乙醇介质中的解聚

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-06-01 DOI: 10.17516/1998-2836-0179

А.В. Мирошникова, С.В. Барышников, Ю.Н. Маляр, В. А. Яковлев, О.П. Таран, Л. Дьякович, Борис Николаевич Кузнецов, A. Miroshnikova, S. V. Baryshnikov, Y. Malyar, V. Yakovlev, O. Taran, L. Djakovitch, B. Kuznetsov

{"title":"Depolymerization of Pine Ethanol Lignin in the Medium of Supercritical Ethanol in the Presence of Catalysts NiCu/SiO₂ and NiCuMo/SiO₂","authors":"А.В. Мирошникова, С.В. Барышников, Ю.Н. Маляр, В. А. Яковлев, О.П. Таран, Л. Дьякович, Борис Николаевич Кузнецов, A. Miroshnikova, S. V. Baryshnikov, Y. Malyar, V. Yakovlev, O. Taran, L. Djakovitch, B. Kuznetsov","doi":"10.17516/1998-2836-0179","DOIUrl":"https://doi.org/10.17516/1998-2836-0179","url":null,"abstract":"The regularities of thermocatalytic transformation of pine ethanol lignin in supercritical ethanol in the presence of catalysts NiCu/SiO₂ and NiCuMo/SiO2 in the temperature range 250–400 °C were established. The composition and structure of ethanol lignin, liquid and solid products of its conversion were studied by methods of elemental analysis and gel-permeating chromatography (GPC). The composition of gaseous products – by method of gas chromatography. At the process temperature of 250 °C the catalysts do not have a significant effect on conversion of ethanol lignin. The maximal yield of liquid products (83.5 wt. %) was obtained at temperature 300 °C in the presence of catalyst NiCuMo/SiO₂ containing 8.8 wt. % of molybdenum. At temperature 350 °C NiCu/SiO₂ and NiCuMo/SiO2 catalysts contribute to the almost complete conversion of ethanol lignin into liquid and gaseous products, and the yield of solid products does not exceed 1 wt. %. In liquid products of catalytic conversion there is a decrease in the atomic ratio of O/C and the increase of H/C atomic ratio as compared to initial ethanol lignin due to catalytic intensification of reactions of deoxygenation and hydrogenation of lignin and products of its depolymerization. According to GPC data on the curves of molecular mass distribution (MMD) of liquid products of thermocatalytic conversion of ethanol lignin at 300 °C there are peaks with highs at 160 and 380 Da, probably related to guiacyle monomers and dimmers, respectively. From the comparison of MMD of liquid products obtained by ethanol lignin depolymerization at 300 °C over catalysts NiCu/SiO₂ and NiCuMo/SiO₂ it follows, that the introduction of molybdenum in the catalyst promotes the formation of monomeric guaiacyl products","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76158140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of the CHNS-Analysis for Studying of Polyoxometallates and Ionic Liquids in the Catalytic Systems chns分析在多金属氧酸盐及离子液体催化体系研究中的应用

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-06-01 DOI: 10.17516/1998-2836-0177

O. S. Koscheeva, L. I. Kuznetsova, N. Kuznetsova

引用次数: 0

Crush and Acid Resistance of Microsphere Narrow Fractions from Fly Ash as the Basis of Composite Materials 粉煤灰微球窄组分作为复合材料基础的抗压耐酸性能

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-06-01 DOI: 10.17516/1998-2836-0174

G. Akimochkina, E. S. Rogovenko, E. Fomenko

引用次数: 0

Optimization of Conditions for Obtaining Stable Hydrosols of Magnetite Nanoparticles 制备磁性纳米颗粒稳定水溶胶的条件优化

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-03-01 DOI: 10.17516/1998-2836-0165

T. Trofimova, S. Saykova, D. Karpov, D. I. Chistyakov, A. Pavlikov

{"title":"Optimization of Conditions for Obtaining Stable Hydrosols of Magnetite Nanoparticles","authors":"T. Trofimova, S. Saykova, D. Karpov, D. I. Chistyakov, A. Pavlikov","doi":"10.17516/1998-2836-0165","DOIUrl":"https://doi.org/10.17516/1998-2836-0165","url":null,"abstract":"The work is devoted to the study of the influence of reaction parameters on the qualitative and quantitative composition of magnetite nanoparticles. The method of their synthesis is optimized using the method of mathematical planning and processing of experimental data. The mathematical model is obtained. It was established that the molar ratio of iron (II) and (III) ions, the time of preliminary boiling of distilled water for preparing solutions, the presence of an inert atmosphere of nitrogen, as well as an excess of alkali affect the formation of a stoichiometric product. Monophase magnetite nanoparticles with an average diameter of 8-12 nm were obtained under optimal conditions. The product is characterized by the methods of transmission electron microscopy and X-ray phase analysis. The effect of pretreatment of magnetite nanoparticles with solutions of strong mineral acids on the stability of its hydrosols has been studied by dynamic and electrophoretic light scattering. It was established that the best stabilization is achieved by pretreatment of magnetite with a solution of perchloric acid","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87116021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enterosorbents from Abies Bark and their Therapeutic and Preventive Properties in Experimental Escherichiosis of Animals 冷杉树皮肠吸收剂及其对实验性动物大肠杆菌病的治疗和预防作用

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2020-03-01 DOI: 10.17516/1998-2836-0158

S. Kuznetsova, G. Skvortsova, A. A. Moroz, S. Schislenko, I. V. Korolkova, N. V. Chesnokov, B. Kuznetsov

{"title":"Enterosorbents from Abies Bark and their Therapeutic and Preventive Properties in Experimental Escherichiosis of Animals","authors":"S. Kuznetsova, G. Skvortsova, A. A. Moroz, S. Schislenko, I. V. Korolkova, N. V. Chesnokov, B. Kuznetsov","doi":"10.17516/1998-2836-0158","DOIUrl":"https://doi.org/10.17516/1998-2836-0158","url":null,"abstract":"Methods have been developed for the preparation of enterosorbents by treating crushed abies bark with the 1.5% aqueous of NaOH solution or by extraction with hexane. It was found that all obtained enterosorbents have good sorption properties with respect to gelatin and methylene blue. The highest sorption activity for methylene blue was shown by a sample, obtained by extraction of abies bark with hexane (97.0 mg/g), and for gelatin sorption activity – a sample, obtained by treatment of abies bark with alkali (225.0 mg/g). It was found that the enterosorbent, obtained by treatment of abies bark with alkali solution both at a dose of 0.15 g per kg of animal weight (g/kg) and at a dose of 0.20 g/kg and the enterosorbent, obtained by extraction of abies bark with hexane at a dose of 0.20 g/kg, have the highest efficiency for the treatment and prevention of acute experimental Escherichiosis. From the considered methods of obtaining enterosorbents from abies bark for the treatment and prevention of gastrointestinal infections of animals, it is recomended to use a method based on treatment of abies bark with alkalai solution and apply the drug in a dose of 0.15 g/kg","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79925766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Isolation and Study of Abies Bark Proanthocyanidins 冷杉树皮原花青素的分离与研究

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2019-12-01 DOI: 10.17516/1998-2836-0155

V. Levdansky, A. Kondrasenko, A. Levdansky, M. Lutoshkin

引用次数: 2

Effect of Conditions of Carbon Sorbents Producing from Abies Bark on Their Structure and Sorption Properties 冷杉树皮炭吸附剂制备条件对其结构和吸附性能的影响

IF 0.4

Journal of Siberian Federal University. Chemistry Pub Date : 2019-11-26 DOI: 10.17516/1998-2836-0139

Иосиф Иванов, Е.В. Веприкова, Н.В. Чесноков, I. Ivanov, E. V. Veprikova, N. V. Chesnokov

{"title":"Effect of Conditions of Carbon Sorbents Producing from Abies Bark on Their Structure and Sorption Properties","authors":"Иосиф Иванов, Е.В. Веприкова, Н.В. Чесноков, I. Ivanov, E. V. Veprikova, N. V. Chesnokov","doi":"10.17516/1998-2836-0139","DOIUrl":"https://doi.org/10.17516/1998-2836-0139","url":null,"abstract":"The ability of producing of effective carbon sorbents from abies bark with the use of thermal alkaline activation in presence of potassium hydroxide was shown. The effects of ratio of bark to alkaline, and temperature of bark pre-carbonization on the porous structure and sorption properties of the carbon sorbents were studied. It was shown, that the capacity of carbon sorbents on iodine is defined by pores with a width 0,73–1,86 nm, on methylene blue – 0,86–2,95 nm, and on vitamin B12 – ≥ 9,31 nm. It was determined, that the carbon sorbent, producing by alkaline activation of product of abies bark carbonization at 400 °С, has a high sorption capacity for studied marker substances. For this sorbent kinetic of iodine, methylene blue and vitamin B12 sorption was studied in comparison with the simple of commercial active coal for medical purposes. It was determined, that this sorbent exceeds the commercial sample in sorption of iodine and vitamin B12 in 1,5 time, and at sorption of methylene blue – in 1.7 time, and it is characterized by a higher rate constants of their markers sorption","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88319845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1