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Unsuccessful synthesis of individual 1,1-dinitroethene 未成功合成单个 1,1-二硝基乙烯
Scientiae Radices Pub Date : 2024-03-04 DOI: 10.58332/scirad2024v3i1a02
Jowita Kras, Maria Mikulska, Radwan Allnajar, Karolina Kula
{"title":"Unsuccessful synthesis of individual 1,1-dinitroethene","authors":"Jowita Kras, Maria Mikulska, Radwan Allnajar, Karolina Kula","doi":"10.58332/scirad2024v3i1a02","DOIUrl":"https://doi.org/10.58332/scirad2024v3i1a02","url":null,"abstract":"The possibility of the preparation of free 1,1-dinitroethene was \u0000examined experimentally on the basis of procedures described \u0000earlier for other examples of 1-R-1-nitroethenes. It was found, that \u0000these types of protocols are non-usable for the preparation of the \u0000title compound due to its high reactivity and tendency to \u0000decomposition and oligomerization.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"79 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140080192","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
Thermal treatment effect on the particle size distribution of alkaline earth metals hydroxyapatite 热处理对碱土金属羟基磷灰石粒度分布的影响
Scientiae Radices Pub Date : 2023-10-11 DOI: 10.58332/scirad2023v2i4a01
Volodymyr Diichuk, Iryna Diichuk
{"title":"Thermal treatment effect on the particle size distribution of alkaline earth metals hydroxyapatite","authors":"Volodymyr Diichuk, Iryna Diichuk","doi":"10.58332/scirad2023v2i4a01","DOIUrl":"https://doi.org/10.58332/scirad2023v2i4a01","url":null,"abstract":"Hydroxyapatites of certain alkaline earth metals were synthesised, and their phase composition was determined using X-ray phase analysis. Thermal modification of the studied compounds was performed at temperatures not exceeding 800°C. The laser diffraction method determined the size distribution of the samples subjected to thermal treatment. It was found that the mean particle size ranged from 5,48±1,28 to 126,71±3,68 μm. It has been demonstrated that particle aggregation and fragmentation processes are possible depending on the synthesised compounds' qualitative and quantitative phase composition and the modification temperature.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"57 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136253120","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
Synthesis of tetrahydroquinolines and quinoline derivatives through the Lewis acid catalysed Povarov reaction: A comparative study between multi step and multi-component methods Lewis酸催化Povarov反应合成四氢喹啉及其衍生物:多步、多组分法的比较研究
Scientiae Radices Pub Date : 2023-09-28 DOI: 10.58332/scirad2023v2i3a05
Djamila Hellel, Fouad Chafaa, Abdelmalek Khorief Nacereddine
{"title":"Synthesis of tetrahydroquinolines and quinoline derivatives through the Lewis acid catalysed Povarov reaction: A comparative study between multi step and multi-component methods","authors":"Djamila Hellel, Fouad Chafaa, Abdelmalek Khorief Nacereddine","doi":"10.58332/scirad2023v2i3a05","DOIUrl":"https://doi.org/10.58332/scirad2023v2i3a05","url":null,"abstract":"In this work, we have synthesised a new disubstituted tetrahydroquinolines by the Povarov [4+2] cycloaddition reaction between imines derivatives and an electron-rich olefin such as vinyl ethers. These reactions were carried out in the presence of different acid catalysts in its two versions, multi-step reaction starting with imine synthesis and multi-component reaction in which the imine is formed in situ. The reactivity of the cycloaddition reaction is directly attributed to the nature of the reagents, the used synthetic strategy, in which the obtained yield is found in the case of multi-step reactions lower than that in the multi-component reaction one. Additionally, the multi-step reactions are faster kinetically in comparison with that of the multi-component one. The nature of the catalyst directly increases the rate and enhances the yield of the reactions.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135344589","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
Trans-Resveratrol as a Health Beneficial Molecule: Activity, Sources, and Methods of Analysis 反式白藜芦醇作为一种有益健康的分子:活性、来源和分析方法
Scientiae Radices Pub Date : 2023-09-27 DOI: 10.58332/scirad2023v2i3a04
Magdalena Anna Malinowska, Marta Sharafan, Arnaud Lanoue, Manon Ferrier, Christophe Hano, Nathalie Giglioli-Guivarc’h, Anna Dziki, Elżbieta Sikora, Agnieszka Szopa
{"title":"Trans-Resveratrol as a Health Beneficial Molecule: Activity, Sources, and Methods of Analysis","authors":"Magdalena Anna Malinowska, Marta Sharafan, Arnaud Lanoue, Manon Ferrier, Christophe Hano, Nathalie Giglioli-Guivarc’h, Anna Dziki, Elżbieta Sikora, Agnieszka Szopa","doi":"10.58332/scirad2023v2i3a04","DOIUrl":"https://doi.org/10.58332/scirad2023v2i3a04","url":null,"abstract":"Trans-Resveratrol, a natural polyphenol found in various plant species, has gained significant attention due to its potential health-promoting properties. This article reviews the biological activities attributed to trans-Resveratrol, its dietary sources, and the analytical methods employed for its quantification. The compound antioxidant, anti-inflammatory, anticancer, cardioprotective, and neuroprotective activities are discussed in detail. Furthermore, the sources of trans-Resveratrol, including grapes, berries, and certain nuts, are examined in terms of their content variability and factors influencing production. Various chromatographic, spectroscopic, and immunoassay methods for the analysis of trans-Resveratrol in different matrices are also explored. This comprehensive overview underscores the significance of trans-Resveratrol as a potential molecule for enhancing human health and longevity.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135579152","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
Thermal [3+2] cycloaddition reactions as most universal way for the effective preparation of five-membered nitrogen containing heterocycles 热[3+2]环加成反应是制备含五元氮杂环最普遍的有效方法
Scientiae Radices Pub Date : 2023-09-25 DOI: 10.58332/scirad2023v2i3a03
Jowita Kras, Mikołaj Sadowski, Karolina Zawadzińska, Roman Nagatsky, Przemysław Woliński, Karolina Kula, Agnieszka Łapczuk
{"title":"Thermal [3+2] cycloaddition reactions as most universal way for the effective preparation of five-membered nitrogen containing heterocycles","authors":"Jowita Kras, Mikołaj Sadowski, Karolina Zawadzińska, Roman Nagatsky, Przemysław Woliński, Karolina Kula, Agnieszka Łapczuk","doi":"10.58332/scirad2023v2i3a03","DOIUrl":"https://doi.org/10.58332/scirad2023v2i3a03","url":null,"abstract":"The possibility of the construction of five-membered heterocycles, including single heteroatom or systems with two, three and four heteroatoms were critically reviewed based on the recent reports regarding to the [3+2] cycloaddition reactions. Almost all of analysed reaction are realized with high regio- and stereoselectivity.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135815844","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
Verification of the analgesic properties of natural compounds of cannabinoid origin in Danio rerio model of nociception 大麻素来源的天然化合物在伤害性损伤模型中的镇痛特性验证
Scientiae Radices Pub Date : 2023-09-22 DOI: 10.58332/scirad2023v2i3a02
Wojciech Ozimkiewicz, Ewelina Iskra, Renata Żelazowska, Justyna Lasota, Anna Boguszewska-Czubara
{"title":"Verification of the analgesic properties of natural compounds of cannabinoid origin in Danio rerio model of nociception","authors":"Wojciech Ozimkiewicz, Ewelina Iskra, Renata Żelazowska, Justyna Lasota, Anna Boguszewska-Czubara","doi":"10.58332/scirad2023v2i3a02","DOIUrl":"https://doi.org/10.58332/scirad2023v2i3a02","url":null,"abstract":"The use of Cannabis sativa in human history dates back thousands of years, with various historical and cultural applications. However, at the beginning of the 20th century, many countries enacted regulations to criminalize and restrict the use of cannabis, leading to a significant reduction in research on its medical applications. A novel approach to pain studies involves Danio rerio-based nociception models. These models use different methods to induce pain, with fish larvae often subjected to incubation in acetic acid solution, resulting in epidermal tissue damage. Nociceptive responses are then observed by tracking fish movement.Our research aimed to develop a simple and accessible Danio rerio (zebrafish) model of nociception to study the potential analgesic properties of CBD (cannabidiol) and CBG (cannabigerol) in comparison to the commonly known painkiller ibuprofen. This research seeks to contribute to our understanding of the potential therapeutic applications of cannabinoids in pain management.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136099091","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
Quantum dots for temperature sensing. 用于温度传感的量子点。
Scientiae Radices Pub Date : 2023-04-19 DOI: 10.58332/scirad2023v2i2a01
Natalia Doskaliuk, Yuliana Lukan, Yuriy Khalavka
{"title":"Quantum dots for temperature sensing.","authors":"Natalia Doskaliuk, Yuliana Lukan, Yuriy Khalavka","doi":"10.58332/scirad2023v2i2a01","DOIUrl":"https://doi.org/10.58332/scirad2023v2i2a01","url":null,"abstract":"Quantum dots are three-dimensional nanoparticles of semiconductors with typical sizes ranging from 2 to 10 nm. Due to the quantum confinement effect the energy gap increase with the size decreasing resulting in size-depended and fine-tunable optical characteristics. Besides this, the energy structure of a quantum dot with a certain size is highly sensitive to environmental conditions. These specific properties open a wide range of applications starting from optical and optoelectronic devices and ending with biosensing and life science. Temperature is one of those parameters influencing strongly on the optical properties of semiconductor nanocrystals, which make them promising materials for temperature sensing, more often using a fluorescent response. Compared to the conventional organic dyes already applied in this field, quantum dots exhibit a set of advantages, such as high quantum yield and photostability, long fluorescence lifetime, higher Stokes shift, and ability to surface functionalization with targeted organic molecules aimed to provide them biocompatibility. In this review, we briefly discuss the properties of II-VI and assumingly less toxic I-III-VI quantum dots, mechanisms of temperature-induced fluorescence response, and the feasibility of their practical application in the field of thermal sensing.","PeriodicalId":487012,"journal":{"name":"Scientiae Radices","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762455","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
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