Compounds最新文献_第5页

The Effect of Strain on the Aromatic Character of Infinitene 菌株对Infinitene芳香特性的影响

Compounds Pub Date : 2023-04-18 DOI: 10.3390/compounds3020025

Maurizio D’Auria

引用次数: 0

Compounds Pub Date : 2023-04-14 DOI: 10.3390/compounds3020024

T. Akitsu

引用次数: 1

Recent Progress on Natural Rubber-Based Materials Containing Metallic and Metal Oxide Nanoparticles: State of the Art and Biomedical Applications 含金属和金属氧化物纳米颗粒的天然橡胶基材料的最新进展:最新进展和生物医学应用

Compounds Pub Date : 2023-03-28 DOI: 10.3390/compounds3020023

N. B. Guerra, Jordana Bortoluz, Andressa R. Bystronski, A. E. D. Maddalozzo, D. Restelatto, M. Roesch-Ely, D. Devine, M. Giovanela, J. S. Crespo

{"title":"Recent Progress on Natural Rubber-Based Materials Containing Metallic and Metal Oxide Nanoparticles: State of the Art and Biomedical Applications","authors":"N. B. Guerra, Jordana Bortoluz, Andressa R. Bystronski, A. E. D. Maddalozzo, D. Restelatto, M. Roesch-Ely, D. Devine, M. Giovanela, J. S. Crespo","doi":"10.3390/compounds3020023","DOIUrl":"https://doi.org/10.3390/compounds3020023","url":null,"abstract":"Diseases caused by infections are becoming harder to treat as the antibiotics used become less effective. A combination of strategies to develop active biomaterials that enhance antibacterial effects are desirable, especially ones that cause fewer side effects and promote healing properties. The combination of nanotechnology with substances that have intrinsic antibacterial activity can result in the advance of innovative biomedical materials. In this sense, the goal of this work is to provide a summary of natural rubber latex materials obtained from the Hevea brasiliensis tree loaded with metallic and metal oxide nanoparticles. These nanoparticles have unique size-dependent chemical and physical characteristic that make them appropriate for use in pharmaceutical and medical devices, while natural rubber latex is a natural and biocompatible polymer with an intrinsic antibacterial effect. Moreover, we outline here the origin, extraction methods, and composition of natural rubber latex and different techniques for the synthesis of nanoparticles, including physical, chemical, and biological approaches. Finally, we summarize, for the first time, the state of the art in obtaining natural rubber-based materials with metallic and metallic oxide nanoparticles for biomedical applications.","PeriodicalId":10621,"journal":{"name":"Compounds","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90876492","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 Organoalkoxysilanes: Versatile Organic–Inorganic Building Blocks 有机烷氧基硅烷的合成:多功能有机-无机构件

Compounds Pub Date : 2023-03-16 DOI: 10.3390/compounds3010021

Carina I. C. Crucho

引用次数: 2

Synthesis and Spectral, Thermal and Antimicrobial Investigation of Mixed Ligand Metal Complexes of N-Salicylidene Aniline and 1,10-Phenanthroline n -水杨基苯胺与1,10-菲罗啉混合配体金属配合物的合成及光谱、热、抗菌研究

Compounds Pub Date : 2023-03-16 DOI: 10.3390/compounds3010022

A. A. Mohamed, Abeer A. Nassr, S. Sadeek, H. S. Elshafie

{"title":"Synthesis and Spectral, Thermal and Antimicrobial Investigation of Mixed Ligand Metal Complexes of N-Salicylidene Aniline and 1,10-Phenanthroline","authors":"A. A. Mohamed, Abeer A. Nassr, S. Sadeek, H. S. Elshafie","doi":"10.3390/compounds3010022","DOIUrl":"https://doi.org/10.3390/compounds3010022","url":null,"abstract":"Coordination compounds of Co(II), Cu(II), Y(III), Zr(IV) and La(III) ions were synthesized from the N-salicylidene aniline (L) derived from the condensation of aniline with salicylaldhyde and 1,10-phenanthroline (phen) as a secondary mixed ligand. L, phen and their complexes were characterized using various physiochemical methods, such as elemental analyses (CHN), Fourier-transform infrared spectroscopy (FT-IR), molar conductance (Λ), magnetic susceptibility (μeff), proton nuclear magnetic resonance (1H NMR), ultraviolet–visible spectroscopy (UV–Vis) and thermogravimetric analysis (TG/DTG). The analytical and spectroscopic data supporting the chemical formulas of the metal complexes and chelation of L and phen with the metal ions forming octahedral complexes. FT-IR spectra demonstrated that L chelated with metal ions as a bidentate ligand via the oxygen atom of the phenolic group with a band in the range 3378–3437 cm−1 and the nitrogen atom of the azomethine group at 1612 cm−1. In addition, phen chelated through two nitrogen atoms in the range 1525–1565 cm−1. The 1H NMR results confirmed the IR assumption that the ligand connected to the metal ions via the phenolic’s oxygen atom. The molar conductance measurements of the complexes revealed high values of the electrolytic nature of these complexes in the range of 90.40–125.80 S cm2 mol−1. Thermal analysis (TG/DTG) was used to differentiate between coordinated and hydrated water molecules and the thermal stability of the complexes. Finally, the anti-microbial activities of the complexes were investigated against fungi (Candida albicans), Gram-negative bacteria (Escherichia coli and Salmonella typhimurium) and Gram-positive bacteria (Staphylococcus aureus and Micrococcus sp.) using the disc diffusion method. The La(III) complex was significant against C. albicans compared with all other compounds and reference standard control.","PeriodicalId":10621,"journal":{"name":"Compounds","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83260430","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: 2

Boronation of Biomass-Derived Materials for Hydrogen Storage 生物质衍生储氢材料的硼化研究

Compounds Pub Date : 2023-03-14 DOI: 10.3390/compounds3010020

A. Lazzarini, Alessia Marino, R. Colaiezzi, O. De Luca, G. Conte, A. Policicchio, A. Aloise, M. Crucianelli

{"title":"Boronation of Biomass-Derived Materials for Hydrogen Storage","authors":"A. Lazzarini, Alessia Marino, R. Colaiezzi, O. De Luca, G. Conte, A. Policicchio, A. Aloise, M. Crucianelli","doi":"10.3390/compounds3010020","DOIUrl":"https://doi.org/10.3390/compounds3010020","url":null,"abstract":"In spite of the widespread range of hydrogen applications as one of the greenest energy vectors, its transportation and storage still remain among the main concerns to be solved in order to definitively kickstart a rapid takeoff of a sustainable H2 economy. The quest for a simple, efficient, and highly reversible release storage technique is a very compelling target. Many studies have been undertaken to increase H2 storage efficiency by exploiting either chemisorption or physisorption processes, or through entrapment on different porous solid materials as sorbent systems. Among these, biomass-derived carbons represent a category of robust, efficient, and low-cost materials. One question that is still open-ended concerns the correlation of H2 uptake with the kind and number of heteroatoms as dopant of the carbonaceous sorbent matrix, such as boron, aiming to increase whenever possible bonding interactions with H2. Furthermore, the preferred choice is a function of the type of hydrogen use, which may involve a short- or long-term storage option. In this article, after a brief overview of the main hydrogen storage methods currently in use, all the currently available techniques for the boronation of activated carbonaceous matrices derived from recycled biomass or agricultural waste are discussed, highlighting the advantages and drawbacks of each of them.","PeriodicalId":10621,"journal":{"name":"Compounds","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80735021","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: 2

Optimization of a Solid-Phase Extraction Procedure for the Separation of Picrocrocin and Crocins from Saffron Extract 藏红花提取物中苦藏红花素和藏红花素固相萃取工艺的优化

Compounds Pub Date : 2023-03-09 DOI: 10.3390/compounds3010019

Panagiota-Kyriaki Revelou, Eleni Kougianou, Marinos Xagoraris, Haralambos Evangelaras, G. Papadopoulos, C. Kanakis, I. Strati, C. Pappas, P. Tarantilis

引用次数: 0

Predicting the Average Composition of an AlFeNiTiVZr-Cr Alloy with Machine Learning and X-ray Spectroscopy 用机器学习和x射线光谱学预测AlFeNiTiVZr-Cr合金的平均成分

Compounds Pub Date : 2023-03-03 DOI: 10.3390/compounds3010018

T. Sadat

引用次数: 2

Abraham Solvation Parameter Model: Revised Predictive Expressions for Solute Transfer into Polydimethylsiloxane Based on Much Larger and Chemically Diverse Datasets 亚伯拉罕溶剂化参数模型:修正的预测表达式溶质转移到聚二甲基硅氧烷基于更大的和化学多样化的数据集

Compounds Pub Date : 2023-02-20 DOI: 10.3390/compounds3010017

Amy Zhou, Laine Longacre, Ramya Motati, W. Acree

引用次数: 1

Protective Effect of Biflavones from Platonia insignis Mart. against Ethidium Bromide-Induced Lethality in Staphylococcus aureus 双黄酮的保护作用。抗溴化乙锭致金黄色葡萄球菌致死率

Compounds Pub Date : 2023-02-10 DOI: 10.3390/compounds3010016

Andressa Sabrina Guimarães Moura, Júlia de Andrade Ferreira Barreto, A. K. F. E. Silva, Maria Luísa Lima Barreto do Nascimento, Emanuelly E.A. Pinheiro, A. K. S. Moura, J. M. Sousa, José de Souza Lima-Neto, A. M. Citó, H. Coutinho, H. M. Barreto

{"title":"Protective Effect of Biflavones from Platonia insignis Mart. against Ethidium Bromide-Induced Lethality in Staphylococcus aureus","authors":"Andressa Sabrina Guimarães Moura, Júlia de Andrade Ferreira Barreto, A. K. F. E. Silva, Maria Luísa Lima Barreto do Nascimento, Emanuelly E.A. Pinheiro, A. K. S. Moura, J. M. Sousa, José de Souza Lima-Neto, A. M. Citó, H. Coutinho, H. M. Barreto","doi":"10.3390/compounds3010016","DOIUrl":"https://doi.org/10.3390/compounds3010016","url":null,"abstract":"Brazilian flora are highly diverse and have great potential for research into new medicines of plant origin. Platonia insignis Mart. is a fruit tree from the Amazon region with several potential pharmacological applications already demonstrated. The present study aimed to investigate the protective effect of a mixture of the biflavones volkensiflavone and moreloflavone obtained from P. insignis flowers against the lethality induced by ethidium bromide in efflux pump overproducer strains of Staphylococcus aureus. Microdilution tests were performed to determine the minimum inhibitory concentration of ethidium bromide in the absence or presence of biflavones. The addition of biflavones to the growth medium increased the minimum inhibitory concentration of ethidium bromide against all strains tested, indicating that biflavones protected the bacterial cells against cell damage induced by this biocide agent. Comparative analysis of the infrared absorption spectra of each isolated compound, as well as of the associated compounds, demonstrated the complexation reaction, indicating that there was a preferential interaction between the H2N- groups of primary amines of ethidium bromide with the carbonyls of biflavones that formed imines -C=NH. Such complexation could reduce the amount of free ethidium bromide molecules available for DNA intercalation, resulting in the observed protective effect. These results suggest a possible technological application of the biflavones from P. insignis as protective agents against cell damage induced by ethidium bromide.","PeriodicalId":10621,"journal":{"name":"Compounds","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89948533","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