发布求助
文献互助 智能选刊 最新文献

Proceedings of the YSU B: Chemical and Biological Sciences最新文献

筛选
英文 中文
QUANTUM CHEMICAL CALCULATION OF STRUCTURAL AND THERMODYNAMIC PROPERTIES OF ETHYL METHYL SULFONE IN THE GAS PHASE 气相中乙基甲基砜结构和热力学性质的量子化学计算
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-11-03 DOI: 10.46991/pysu:b/2023.57.3.199
Liana S. Gabrielyan, Z. Papanyan
{"title":"QUANTUM CHEMICAL CALCULATION OF STRUCTURAL AND THERMODYNAMIC PROPERTIES OF ETHYL METHYL SULFONE IN THE GAS PHASE","authors":"Liana S. Gabrielyan, Z. Papanyan","doi":"10.46991/pysu:b/2023.57.3.199","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.3.199","url":null,"abstract":"A detailed conformational analysis of ethyl methyl sulfone has been carried out using quantum chemical approaches, by revealing all stable conformers, their energy, structural parameters, relative population, and IR spectra at different levels of theory. Thermochemical parameters, such as energy, entropy and heat capacity of ethyl methyl sulfone stable conformers in the gas phase were calculated directly using the wB97XD/6-311++G(2df, 2pd) density functional theory method. Some correlation has been established between the structural characteristics of various conformers and their thermodynamic properties.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139289969","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
BIOMASS FORMATION BY DIFFERENT COLLECTIONS OF $PLEUROTUS$ SPP. DURING SUBMERGED GROWTH 在沉水生长过程中，不同系列的褶菌形成的生物量沉水生长过程中
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-10-05 DOI: 10.46991/pysu:b/2023.57.3.222
S. Badalyan, N. Gharibyan
{"title":"BIOMASS FORMATION BY DIFFERENT COLLECTIONS OF $PLEUROTUS$ SPP. DURING SUBMERGED GROWTH","authors":"S. Badalyan, N. Gharibyan","doi":"10.46991/pysu:b/2023.57.3.222","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.3.222","url":null,"abstract":"Many species of the genus Pleurotus (Fr.) P. Kumm. (Oyster mushrooms) are known as valuable edible and medicinal fungi, cultivated worldwide. The studied 18 different collections of five Pleurotus species (P. ostreatus, P. cornucopiae, P. eryngii, P. pulmonarius, and P. cystidiosus) during submerged growth in malt extract medium formed round shaped fluffy pellets and disperse mycelium. After seven days of cultivation, they accumulated up to 29.46 g/L biomass, while after 14 days the amount increased up to 40.4 g/L, reaching the value of commercial P. ostreatus 22 strain. More than 30.0 g/L biomass was formed in nine from 12 P. ostreatus collections, among which Armenian (SB24 and SB25), French (Po/28) and Spanish (N001) strains, as ecologically safe resources are perspective for further study to develop mushroom-based biotech products, food, pharmaceuticals and cosmeceticals.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139323345","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
SPECTROPHOTOMETRIC STUDY OF COMPLEXES OF SOME INTERCALATORS WITH DOUBLE-STRANDED AND SINGLE-STRANDED NUCLEIC ACIDS 一些中间体与双链和单链核酸复合物的分光光度法研究
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-10-05 DOI: 10.46991/pysu:b/2023.57.3.214
A. Antonyan, Zvart O. Movsisyan, Anzhela H. Karapetyan, P. Vardevanyan
{"title":"SPECTROPHOTOMETRIC STUDY OF COMPLEXES OF SOME INTERCALATORS WITH DOUBLE-STRANDED AND SINGLE-STRANDED NUCLEIC ACIDS","authors":"A. Antonyan, Zvart O. Movsisyan, Anzhela H. Karapetyan, P. Vardevanyan","doi":"10.46991/pysu:b/2023.57.3.214","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.3.214","url":null,"abstract":"Interaction of ethidium bromide (EtBr), acridine orange (AO) and non-intercalator methylene blue (MB) with DNA as well as interaction of EtBr and MB with single-stranded synthetic polynucleotides poly(rA) and poly(rU) have been studied. It was revealed that in absorption spectra of EtBr and MB with DNA or single-stranded polynucleotides a real- or pseudo-isosbestic point appears. Particularly, in absorption spectra of the complexes of classical intercalator EtBr with DNA the real isosbestic point is formed, but in the case of non-classical intercalator MB a pseudo-isosbestic point is formed, while in the absorption spectra of their complexes with single-stranded polynucleotides a pseudo-isosbestic point is formed. It was found out that for another classical intercalator AO there is no a real or pseudo-isosbestic point.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139322951","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
CONDUCTIVE POLYMERS AS MATERIALS USED IN SENSORS FOR DETERMINATION OF IMPORTANT VOLATILE COMPOUNDS IN THE FIELD OF FOOD SAFETY 导电聚合物作为传感器材料用于食品安全领域重要挥发性化合物的测定
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-09-22 DOI: 10.46991/pysu:b/2023.57.3.190
M. Torosyan, Narine K. Durgaryan
{"title":"CONDUCTIVE POLYMERS AS MATERIALS USED IN SENSORS FOR DETERMINATION OF IMPORTANT VOLATILE COMPOUNDS IN THE FIELD OF FOOD SAFETY","authors":"M. Torosyan, Narine K. Durgaryan","doi":"10.46991/pysu:b/2023.57.3.190","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.3.190","url":null,"abstract":"In the field of food safety, sensors are widely used for the detection and determination of a wide variety of volatile compounds. This work presents the synthesis of a number of polyaniline analog polymers and the study of their properties as such sensors. In the course of the work, the design and preparation of carriers for polymers with sensor properties was carried out and, based on it, a new method for measuring and recording changes in the electrical conductivity of insoluble polymers in the presence of volatile substances was developed. The applicability of the developed method was verified.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139337250","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
STUDY OF ANTIOXIDANT PROPERTIES OF SOME TYPES OF PACKAGED COFFEE 研究某些包装咖啡的抗氧化特性
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-09-15 DOI: 10.46991/pysu:b/2023.57.3.182
V.V. Vardapetyan, M. Torosyan, G. A. Shahinyan, A. I. Martiryan
{"title":"STUDY OF ANTIOXIDANT PROPERTIES OF SOME TYPES OF PACKAGED COFFEE","authors":"V.V. Vardapetyan, M. Torosyan, G. A. Shahinyan, A. I. Martiryan","doi":"10.46991/pysu:b/2023.57.3.182","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.3.182","url":null,"abstract":"In this work, several varieties of instant and ground, roasted black packaged coffee were studied. Various extraction methods were used to obtain extracts. The caffeine content was investigated by UV-Vis absorption spectroscopy and HPLC chromatography. The antioxidant properties of the extracts were studied by the method of competitive reactions.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139339710","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
ERYTHROCYTES AS A MODEL FOR STUDYING THE EFFECT OF TEMPERATURE ON THE RESISTENCE OF CELLULAR MEMBRANES 将红细胞作为研究温度对细胞膜电阻影响的模型
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-07-07 DOI: 10.46991/pysu:b/2023.57.2.118
M. Mikaelyan, M. Shahinyan, M. Parsadanyan
{"title":"ERYTHROCYTES AS A MODEL FOR STUDYING THE EFFECT OF TEMPERATURE ON THE RESISTENCE OF CELLULAR MEMBRANES","authors":"M. Mikaelyan, M. Shahinyan, M. Parsadanyan","doi":"10.46991/pysu:b/2023.57.2.118","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.2.118","url":null,"abstract":"In this work the effect of different temperatures on erythrocyte resistance has been studied. It was also examined the influence of various temperatures on optic density change of erythrocyte suspension. It was shown that there are no sharp changes of optic density values of erythrocyte suspension, based on which we assume that under the effect of the given temperatures the significant alterations are not observed, but the state of erythrocytes changes, particularly the structure of erythrocyte membranes changes. It was also revealed that the structural changes of erythrocyte membranes occur under the impact of environmental factors, including anthropogenic ones.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139362025","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
EFFECT OF VARIOUS CARBON SOURCES ON THE GROWTH PROPERTIES AND MORPHOLOGY OF $SPIRULINA~PLATENSIS$ 各种碳源对螺旋藻生长特性和形态的影响
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-07-07 DOI: 10.46991/pysu:b/2023.57.2.164
Ani A. Harutyunyan, J. Manoyan, L. Hambaryan, L. Gabrielyan
{"title":"EFFECT OF VARIOUS CARBON SOURCES ON THE GROWTH PROPERTIES AND MORPHOLOGY OF $SPIRULINA~PLATENSIS$","authors":"Ani A. Harutyunyan, J. Manoyan, L. Hambaryan, L. Gabrielyan","doi":"10.46991/pysu:b/2023.57.2.164","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.2.164","url":null,"abstract":"Cyanobacteria generate biomass under photoautotrophic conditions during photosynthesis. Cultivation of cyanobacteria under photoheterotrophic conditions using various organic carbon sources can increase yield of biomass. In the current study, the effect of organic carbon sources on the growth properties and morphology of cyanobacteria Spirulina platensis, as well as the production of the photosynthetic pigments: chlorophyll a, carotenoids, and phycocyanin were investigated. Carbon sources, such as glucose, fructose and succinate, caused not only an increase in the cyanobacterial growth rate, but also morphological changes in S. platensis trichomes. An increase in the amounts of photosynthetic pigments was also observed. Thus, glucose, fructose, and succinate are more efficient substrates for photoheterotrophic cultivation of these cyanobacteria.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139361597","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
PREPARATION AND STUDY OF JUNIPER BERRY AND SEED EXTRACTS 杜松浆果和种子提取物的制备与研究
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-07-07 DOI: 10.46991/pysu:b/2023.57.2.177
M. Torosyan, V.V. Vardapetyan, G. A. Shahinyan, A. I. Martiryan
{"title":"PREPARATION AND STUDY OF JUNIPER BERRY AND SEED EXTRACTS","authors":"M. Torosyan, V.V. Vardapetyan, G. A. Shahinyan, A. I. Martiryan","doi":"10.46991/pysu:b/2023.57.2.177","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.2.177","url":null,"abstract":"The study of antioxidants in plants is one of the modern scientific and practical problems. The aim of this work is to obtain the extracts of pharmacy sale juniper berries and seeds, and to study their antioxidant properties by the method of competitive reactions. In this work, a number of extraction methods were used, and the investigation of the obtained extracts was performed by spectrometric and chromatographic methods.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139361656","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
MICROBIOLOGICAL ASSESSMENT OF FECAL CONTAMINATION IN THE RIVER WATERS OF THE VOGHJI RIVER CATCHMENT BASIN 沃吉河流域河水粪便污染的微生物学评估
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-07-07 DOI: 10.46991/pysu:b/2023.57.2.172
A.L. Varagyan, Gor A. Gevorgyan
{"title":"MICROBIOLOGICAL ASSESSMENT OF FECAL CONTAMINATION IN THE RIVER WATERS OF THE VOGHJI RIVER CATCHMENT BASIN","authors":"A.L. Varagyan, Gor A. Gevorgyan","doi":"10.46991/pysu:b/2023.57.2.172","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.2.172","url":null,"abstract":"Quantitative parameters of total and fecal coliform, as well as Escherichia coli bacteria in the river waters of the Voghji River catchment basin were investigated to characterize fecal contamination in the investigated watershed basin. Water samples for microbial analyses were collected from the Voghji River and its Geghi, Norashenik and Vachagan tributaries in 2016, 2017 and 2020. The results of the study revealed the distribution, potential sources and environmental risks of fecal contamination in the Voghji River catchment basin.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139361454","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
CHIRAL SEPARATION OF $(2S,~9S)$-DIAMINO-2,9-DIBENZYLDECA-4,6-DIYNEDIOIC ACID AND $(2R,~9R)$-DIAMINO-2,9-DIBENZYLDECA-4,6-DIYNEDIOIC ACID (2s,~9s)$二氨基-2,9-二苄基癸-4,6-二炔二酸和 $(2r,~9r)$二氨基-2,9-二苄基癸-4,6-二炔二酸的手性分离
Proceedings of the YSU B: Chemical and Biological Sciences Pub Date : 2023-07-07 DOI: 10.46991/pysu:b/2023.57.2.110
A. Tsaturyan
{"title":"CHIRAL SEPARATION OF $(2S,~9S)$-DIAMINO-2,9-DIBENZYLDECA-4,6-DIYNEDIOIC ACID AND $(2R,~9R)$-DIAMINO-2,9-DIBENZYLDECA-4,6-DIYNEDIOIC ACID","authors":"A. Tsaturyan","doi":"10.46991/pysu:b/2023.57.2.110","DOIUrl":"https://doi.org/10.46991/pysu:b/2023.57.2.110","url":null,"abstract":"The enantiomers of the chiral compound (2S, 9S)-diamino-2,9-dibenzyldeca-4,6-diynedioic acid and (2R, 9R)-diamino-2,9-dibenzyldeca-4,6-diynedioic acid were separated by a chiral high-performance liquid chromatography (HPLC) method. The separation of α-amino acids was performed using a 5µ 4.0×250 mm column, which was obtained on the basis of a sorbent with eremomycin. The sorbent is silica gel (with 11 nm pore diameter and a surface area of 300 m2/g) with epoxy groups grafted on them with antibiotic eremomycin. Chiral HPLC is one of the most common methods for separating enantiomers of chiral compounds. Synthesis of new pharmaceutical substances, which are one of the isomers of a substance, obtaining of new drugs based on them, as well as the need to control the presence of the second isomer in such drugs, impose new requirements on the modern chromat-ographic separation of isomers.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139361763","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信