Pure and Applied Chemistry最新文献_第3页

Fire fighters and mass spectrometry: from the world of combustion to the molecular ion 消防员与质谱：从燃烧世界到分子离子

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-24 DOI: 10.1515/pac-2024-0020

Fabrizio Malaspina, Federica D’Aloise, Marco Pazzi, Vincenzo Bennardo

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Reactions of trans-[PtX2(pic)2] (Pic = γ-PICOLINE, X = Cl−, NO3 −) with N-acetyl-l-cysteine and glutathione 反式-[PtX2(pic)2]（Pic = γ-PICOLINE，X = Cl-，NO3-）与 N-乙酰基-l-半胱氨酸和谷胱甘肽的反应

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-21 DOI: 10.1515/pac-2023-1206

Sutopo Hadi, Noviany Noviany, Yandri Yandri

{"title":"Reactions of trans-[PtX2(pic)2] (Pic = γ-PICOLINE, X = Cl−, NO3 −) with N-acetyl-l-cysteine and glutathione","authors":"Sutopo Hadi, Noviany Noviany, Yandri Yandri","doi":"10.1515/pac-2023-1206","DOIUrl":"https://doi.org/10.1515/pac-2023-1206","url":null,"abstract":"The reactions of trans-[PtX2(pic)2] (pic = γ-picoline, X = Cl−, NO3 −) with N-acetyl-l-cysteine (acSH) and glutathione (GSH) were monitored and followed by 1H and 195Pt NMR. In the reaction of trans-[Pt(pic)2(D2O)2](NO3)2 with acSH, in the 195Pt NMR spectra, the most intense peak observed was trans-[Pt(pic)2(acS)}2(µ-acS)]+ (3). The intermediate product which was not clearly seen in the spectra was formulated as trans-[Pt (pic)2(acS)(D2O)]+ (2), with the weaker peak one as trans-[Pt(pic)2(acS)2] (1). With GSH, the main product observed was trans-[Pt(pic)2(GS)2] (4), while the intermediate product was not observed during this study. In the reactions of trans-[PtCl2(pic)2] with acSH, besides complexes 1 and 3 formed, the formation of trans-[Pt(pic)2Cl(acS)] (6) was also observed in the NMR spectra, while when it was reacted with GSH, followed a similar course to that of with acSH, but more slowly.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Mapping the distribution of bioactive compounds and aroma/flavour precursors in green coffee beans with an integrated mass spectrometry-based approach 利用基于质谱的综合方法绘制绿咖啡豆中生物活性化合物和香气/风味前体物质的分布图

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-19 DOI: 10.1515/pac-2024-0210

Greta Bindi, Andrew Smith, P. Crisafulli, V. Denti, Eleonora Bossi, Simone Serrao, I. Piga, William S. Sánchez, Giuseppe Paglia, Fulvio Magni, Luciano Navarini

{"title":"Mapping the distribution of bioactive compounds and aroma/flavour precursors in green coffee beans with an integrated mass spectrometry-based approach","authors":"Greta Bindi, Andrew Smith, P. Crisafulli, V. Denti, Eleonora Bossi, Simone Serrao, I. Piga, William S. Sánchez, Giuseppe Paglia, Fulvio Magni, Luciano Navarini","doi":"10.1515/pac-2024-0210","DOIUrl":"https://doi.org/10.1515/pac-2024-0210","url":null,"abstract":"Abstract Coffee is one of the most enjoyed beverages worldwide and whilst a wide array of secondary metabolites has been qualitatively and quantitatively characterised within the coffee bean, little is known about their distribution in different bean tissues. In this work, complementary mass spectrometry (MS) based approaches were utilised to determine the spatial metabolomic content of coffee beans, focusing on highlighting those which presented a regiospecific distribution and distinguished the different endosperm regions and the embryo. Preliminary exploration of the spatial metabolome of Coffea arabica coffee beans highlighted tissue-specific molecular features through an unsupervised statistical analysis. Then, the complementary information derived from higher resolution MS approaches resulted in the annotation of 13 metabolites which showed a specific enrichment in at least one tissue, and most of these were noted to be bioactive compounds or aroma/flavour precursors. Knowledge of the tissue distribution of these compounds could shed light on their biological role in plant physiology and bean development, but could also have relevant implications for their positive impact on human health due to coffee consumption as well as their possible effect on aroma and flavour upon roasting of green coffee beans.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141334914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties of web kapok/fiberglass-epoxy hybrid composites for marine structures 用于海洋结构的腹板木棉/玻璃纤维-环氧混合复合材料的力学性能

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-19 DOI: 10.1515/pac-2024-0021

M. A. M. Mohd Idrus, Faqihah Nazifa Firdaus, Shamsul Effendy Abdul Hamid, M. R. Zoolfakar, R. K. Shuib, Dai Lam Tran, A. Saat

{"title":"Mechanical properties of web kapok/fiberglass-epoxy hybrid composites for marine structures","authors":"M. A. M. Mohd Idrus, Faqihah Nazifa Firdaus, Shamsul Effendy Abdul Hamid, M. R. Zoolfakar, R. K. Shuib, Dai Lam Tran, A. Saat","doi":"10.1515/pac-2024-0021","DOIUrl":"https://doi.org/10.1515/pac-2024-0021","url":null,"abstract":"Abstract This study investigates the mechanical properties of hybrid composites composed of web kapok fibers and fiberglass reinforced with epoxy for potential application in the marine industry. The web kapok fibers were carefully processed using a carding technique to ensure better alignment and consistency. Various composite configurations were produced, and extensive mechanical testing was conducted, including flexural, tensile, and impact tests. The results revealed that the presence of two web kapok fiber layers within the composite significantly increased flexural strength and flexural modulus compared to pure fiberglass laminates. However, a single layer of web kapok fabrics exhibited the highest tensile strength, although it decreased with additional layers. The impact strength of these hybrid composites also showed promising results, especially when compared to raw fiberglass composites. Moreover, these composites exhibited improved resistance to water absorption and corrosion, making them potentially suitable for marine applications. This research highlights the potential of web kapok/fiberglass hybrid composites as an eco-friendly alternative for marine engineering, with implications for reduced environmental impact and sustainable technology in the industry.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141334916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Importance of dielectric friction effect on polyelectrolytes conductivity 介电摩擦效应对聚电解质导电性的重要性

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-13 DOI: 10.1515/pac-2024-0101

Jalel Mhalla, Anis Ghazouani, S. Boughammoura

引用次数: 0

Capabilities and drawbacks of mass spectrometry in the forensic field: analysis of real cases dealing with toxicology and explosives 质谱法在法医领域的能力和缺点：毒理学和爆炸物真实案例分析

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-13 DOI: 10.1515/pac-2024-0026

Giada Furlan, Emanuela Canò, Matteo Zuddas, Antonio Giuliano

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Design and antibacterial application of silver phthalocyanine-silver modified silicate immobilized on fabric 固定在织物上的酞菁银-银改性硅酸盐的设计与抗菌应用

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-11 DOI: 10.1515/pac-2024-0222

Kuo-Hui Wu, Wen-Chien Huang, Je-Chuang Wang, Tsung-Han Yang, Chia-Ling Li

引用次数: 0

Coconut shell-derived green synthesised carbon nanotubes for clean-up of crude oil spills 用于清理原油泄漏的椰壳衍生绿色合成碳纳米管

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-10 DOI: 10.1515/pac-2024-0207

Mansur Yahaya Ibrahim, Hadi Sulaiman

{"title":"Coconut shell-derived green synthesised carbon nanotubes for clean-up of crude oil spills","authors":"Mansur Yahaya Ibrahim, Hadi Sulaiman","doi":"10.1515/pac-2024-0207","DOIUrl":"https://doi.org/10.1515/pac-2024-0207","url":null,"abstract":"Abstract The global economy has led to an increase in oil transportation and exploitation, posing a threat to aquatic and terrestrial ecosystems. Crude oil spilled water purification is a major challenge worldwide. Researchers are focusing on finding adsorbents that improve oil adsorption capability. In the present study the adsorption of crude oil using synthesized carbon nanotubes (CNTs) prepared from coconut shell was investigated by batch adsorption experiments under varying parameters (adsorbent dosage and contact time) after analytical techniques (UV–vis, FTIR and SEM) confirmed the formation of the CNTs. The morphological modification significantly increased the hydrophobicity of the adsorbent, thus creating a synthesized CNTs with a much better adsorption capacity for crude oil removal having a maximum adsorption capacity of 4855.8 mg/g. The experimental results showed that the percentage of crude oil removal increased with an increase in adsorbent dosage and the contact time respectively. According to the correlation coefficient (R 2 = 0.9801) value obtained from the adsorption isotherm investigations, the isotherms were found to fit the Freundlich isotherm somewhat better than the Langmuir isotherm model, which is consistent with the findings reported in the literature. These findings have made the synthesised CNTs an attractive, useful, and environmentally friendly adsorbent for controlling crude oil spill.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An exercise-based international polymer syllabus 基于练习的国际聚合物教学大纲

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-10 DOI: 10.1515/pac-2024-0029

Rameshwar Adhikari, Patricia Targon Campana, Y. Choo, Marcos Lopes Dias, Claudio G. dos Santos, Christopher M. Fellows, Michael Hess, Romain Lucas-Roper, C. Luscombe, Peter E. Mallon, Jan Merna, Marloes Peeters, Tien Thuy Quach, Patrick Théato, P. Topham, Jiří Vohlídal, Michael Walter

{"title":"An exercise-based international polymer syllabus","authors":"Rameshwar Adhikari, Patricia Targon Campana, Y. Choo, Marcos Lopes Dias, Claudio G. dos Santos, Christopher M. Fellows, Michael Hess, Romain Lucas-Roper, C. Luscombe, Peter E. Mallon, Jan Merna, Marloes Peeters, Tien Thuy Quach, Patrick Théato, P. Topham, Jiří Vohlídal, Michael Walter","doi":"10.1515/pac-2024-0029","DOIUrl":"https://doi.org/10.1515/pac-2024-0029","url":null,"abstract":"Abstract The IUPAC Subcommittee on Polymer Education has been pursuing the development of a compact syllabus covering the essential topics required for a tertiary education in polymer science, with numerical and short answer exercises addressing each topic. The primary goal of the document is to provide a framework for a complete course made freely available worldwide so that any educator can implement a professionally-curated course in polymer science for their students without needing expensive textbooks or reliable internet access. An important secondary goal is to popularize the use of approved IUPAC terminology in polymer science by using it consistently throughout the document and providing references to IUPAC source documents. Professor Melissa Chin Han Chan was an active and enthusiastic participant in the project who played a significant role in its design and implementation. The late Professor Richard ‘Dick’ Jones also had a keen interest in the project and had a great influence on its direction and structure. This brief note is dedicated to these two illustrious polymer scientists.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141364940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phytochemicals as potential active principal components for formulation of alternative antifungal remedies against Trichophyton spp.: a systematic review 植物化学物质作为替代抗真菌药的潜在活性主要成分：系统综述

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-06-05 DOI: 10.1515/pac-2023-1114

Rudo Zhou, P. Dzomba, L. Gwatidzo

{"title":"Phytochemicals as potential active principal components for formulation of alternative antifungal remedies against Trichophyton spp.: a systematic review","authors":"Rudo Zhou, P. Dzomba, L. Gwatidzo","doi":"10.1515/pac-2023-1114","DOIUrl":"https://doi.org/10.1515/pac-2023-1114","url":null,"abstract":"Abstract In this age of emergent resistance to antimicrobial agents, pathogenic fungi are not an exception. Diverse strategies have been implemented to curb rampant fungal infections including screening new drugs and stewardship programs. A plethora of recent studies have proved that phytochemicals are efficacious against pathogenic fungi and have potent antifungal activity. This review examines the use of phytochemicals as possible alternative antifungal agents against dermatophytes particularly Trichophyton spp. Literature search was done using three search engines namely Google Scholar, PubMed and Science Direct limited to the year 2019–2023 only. A total of 30 articles were included and 48 plant extracts were evaluated. The major phytochemicals that proved to be potent antifungals both in vitro and in vivo were terpenoids and phenolics. The antifungal potential of phyto-compounds was significantly elevated by incarnation with nanotechnology. Although much has been done in screening of herbal extracts as possible antifungal agents huge gaps still exist on full characterization of all active herbal extracts with antifungal potential especially against resistant strains, together with their mechanism of action, formulation of pharmaceutical dosage forms and clinical trials.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141382223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0