Monatshefte für Chemie / Chemical Monthly最新文献_第5页

Interference of bicarbonate and carbonate anions in the solar disinfection of water 碳酸氢盐和碳酸盐阴离子对太阳能消毒水的干扰

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-05-06 DOI: 10.1007/s00706-024-03206-3

Juliana Paggiaro, Cleidiane Cardoso Teixeira, Grasiele Soares Cavallini, Douglas Henrique Pereira

{"title":"Interference of bicarbonate and carbonate anions in the solar disinfection of water","authors":"Juliana Paggiaro, Cleidiane Cardoso Teixeira, Grasiele Soares Cavallini, Douglas Henrique Pereira","doi":"10.1007/s00706-024-03206-3","DOIUrl":"https://doi.org/10.1007/s00706-024-03206-3","url":null,"abstract":"Sunlight-mediated water disinfection (SODIS) is an important technique, especially when applied in regions where the water treatment system is fragile because the SODIS process has a high capacity for inactivating pathogenic microorganisms. Although the intensity of solar radiation, exposure time, and turbidity of the water are relevant factors for the process, it has also been observed that the chemical composition of the water can interfere with the efficiency of the process. Some chemical species are able to capture radicals that are important for the disinfection process; therefore, the identification of these compounds would contribute to the optimization of the process and increase its efficiency. Thus, the present study aims to evaluate the influence of bicarbonate and carbonate anions using concentrations of Na2CO3 (5, 10, 20, 50, 75, 100, 150, 200, and 300 mg dm−3) on the solar disinfection process in surface water using total coliforms (C0 = 104 UFC.100 cm−3) and Escherichia coli (C0 = 103 UFC.100 cm−3) content as performance parameters for disinfection efficiency. It was observed that in all samples exposed to solar radiation (4 and 5 h), there was a reduction in E. coli and total coliform content when compared to a sample that was not exposed to radiation. However, the addition of carbonate and bicarbonate anions negatively interferes with the disinfection process, reducing the efficiency of SODIS by approximately 0.1 log for E. coli and 0.3 log for CT from a Na2CO3.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930999","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

Determination of tinidazole by voltammetric analysis using poly (L-arginine) modified carbon paste electrode 使用聚（L-精氨酸）改性碳浆电极通过伏安分析法测定替硝唑

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-05-06 DOI: 10.1007/s00706-024-03209-0

D. P. Prashanth, J. G. Manjunatha, K. P. Moulya, C. Raril, Samar A. Aldossari, Saikh Mohammad

{"title":"Determination of tinidazole by voltammetric analysis using poly (L-arginine) modified carbon paste electrode","authors":"D. P. Prashanth, J. G. Manjunatha, K. P. Moulya, C. Raril, Samar A. Aldossari, Saikh Mohammad","doi":"10.1007/s00706-024-03209-0","DOIUrl":"https://doi.org/10.1007/s00706-024-03209-0","url":null,"abstract":"The current study presents the analysis of tinidazole with the aid of electrochemical analysis by utilizing 0.2 M of phosphate buffer saline and a modified carbon paste electrode. Poly(L-arginine) fabricated carbon paste electrode (PLAMCPE) was obtained by polymerizing L-arginine (L-agn) onto a bare carbon paste electrode (BCPE) by applying electropolymerisation method at pH 6.5. To examine the electrochemical response and characterization of the developed PLAMCPE, differential pulse voltammetry (DPV), cyclic voltammetry, electrochemical impedance spectroscopy, and scanning electron microscope techniques were implemented. The PLAMCPE shows significantly enhanced electrochemical sensitivity for the reduction of tinidazole compared to BCPE. At optimal working circumstances, the consequences of several parameters like scan rate, pH, concentration variation, and active surface area were analyzed. By examining the scan rate, the reaction was found to be diffusion controlled. The attained values of limit of detection was 0.0841 μM, and limit of quantification was 0.2803 μM at a linear range of 0.2 to 9.0 μM for DPV method. Moreover, PLAMCPE shows great selectivity and sensitivity at sensing tinidazole in the occurrence of other interfering organic dyes and metal ions. In addition, it demonstrates commendable repetitiveness, stability, and reproducibility. The developed electrode has a remarkable recovery rate indicating its applicability to the real sample.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930762","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

PEG-mediated facile one-pot synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones using magnetically separable magnetite supported MgO core–shell nanocatalyst: a Green approach 利用磁性可分离的磁铁矿支撑氧化镁核壳纳米催化剂，以 PEG 为介导，轻松实现 1,2-二氢-1-芳基萘并[1,2-e][1,3]恶嗪-3-酮的一锅合成：一种绿色方法

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-04-17 DOI: 10.1007/s00706-024-03202-7

Gayatree Shinde, Jyotsna Thakur

引用次数: 0

Cellulosic fibers spun from stabilized imidazolium ionic liquids: identification of chromophores in the fibers after accelerated ageing 用稳定的咪唑离子液体纺制纤维素纤维：鉴定加速老化后纤维中的发色团

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-04-11 DOI: 10.1007/s00706-024-03203-6

Thomas Rosenau, Antje Potthast, Jiaping Zhang, Stefano Barbini, Mitsuharu Koide, Uwe Rinner, Hubert Hettegger

{"title":"Cellulosic fibers spun from stabilized imidazolium ionic liquids: identification of chromophores in the fibers after accelerated ageing","authors":"Thomas Rosenau, Antje Potthast, Jiaping Zhang, Stefano Barbini, Mitsuharu Koide, Uwe Rinner, Hubert Hettegger","doi":"10.1007/s00706-024-03203-6","DOIUrl":"https://doi.org/10.1007/s00706-024-03203-6","url":null,"abstract":"Cellulosic fibers spun from 1,3-dialkylimidazolium ionic liquids are effectively stabilized against cellulose degradation by the addition of antioxidants, but this protective effect comes at the expense of chromophore generation from the degradation products of the stabilizers. In this study, we identified the oxidation and degradation products of four natural antioxidants, α-tocopherol, N-methyl-α-tocopheramine, propyl gallate, and hydroxytyrosol, formed upon accelerated ageing of the fibers. Ageing was performed according to standard protocols under either dry or moist conditions and the extraction was done with supercritical carbon dioxide. Chromophore formation in spinning dope, upon dry ageing and moist ageing were compared. In total, 16 different oxidation/degradation products were isolated, their structure confirmed by comprehensive analytical characterization with full NMR resonance assignment in the 1H and 13C domains as well as by comparison with authentic samples, and their formation pathways discussed. Knowledge of the chemical structures of the degradation products originating from the stabilizers now provides a good starting point for optimization of the fiber bleaching stage.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570218","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

Will Power and Waste-to-X enable the worldwide energy transition to renewables? 电力和废物变X能否推动全球能源向可再生能源过渡？

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-04-03 DOI: 10.1007/s00706-024-03176-6

引用次数: 0

Arylation of quinoxalinones at room temperature under metal and base free-conditions 室温下无金属和碱条件下的喹喔啉酮芳基化反应

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-03-26 DOI: 10.1007/s00706-024-03188-2

引用次数: 0

Synthesis of N-acetylglucosamine analogues modified at C6 position with azido-derived moieties 用叠氮衍生物修饰 C6 位的 N-乙酰葡糖胺类似物的合成

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-03-25 DOI: 10.1007/s00706-024-03198-0

Massimo Alagia, Lorenzo Taglietti, Barbara La Ferla

引用次数: 0

Heterocycle-substituted 1,5-benzothiazepines: biological properties and structure–activity relationships 杂环取代的 1,5-苯并硫氮杂卓：生物特性和结构-活性关系

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-03-21 DOI: 10.1007/s00706-024-03195-3

Felien Morlion, Katarina Magdalenic, John Van Camp, Matthias D’hooghe

引用次数: 0

Detection of uric acid using colorimetric method based on iron-doped single-atom catalyst with peroxidase activity 基于具有过氧化物酶活性的掺铁单原子催化剂的比色法检测尿酸

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-03-20 DOI: 10.1007/s00706-024-03199-z

{"title":"Detection of uric acid using colorimetric method based on iron-doped single-atom catalyst with peroxidase activity","authors":"","doi":"10.1007/s00706-024-03199-z","DOIUrl":"https://doi.org/10.1007/s00706-024-03199-z","url":null,"abstract":"<h3>Abstract</h3> Single-atom catalysts (SACs) have garnered considerable attention owing to their impeccable catalytic activity and unique ability to elucidate the active site. In this work, we synthesized iron-doped single-atom catalysts (Fe SACs) via a soft-template sacrificial approach, which exhibited peroxidase activity. Further investigations revealed that Fe SACs were capable of catalyzing the generation of highly reactive hydroxyl radicals (•OH) from hydrogen peroxide (H2O2), which facilitated the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) to oxTMB, resulting in a discernible color change from colorless to blue. According to the exceptional peroxidase activity of Fe SACs, we designed and fabricated a colorimetric sensor by combining uricase and TMB, achieving highly sensitive and selective detection of uric acid over a wide range of concentrations (0.1–50 μM), with a low detection limit of 0.039 μM (3σ/k). Finally, we demonstrated the feasibility of our sensor in detecting uric acid in real human urine samples, yielding satisfactory recoveries and low relative standard deviations. <h3>Graphical abstract</h3> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/706_2024_3199_Figa_HTML.png\"/> ","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"124 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140173012","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

Electrochemical behavior and determination of pyridoxine at chemically modified carbon paste electrode by electropolymerization 电聚合化学修饰碳浆电极的电化学行为和吡哆醇的测定

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-03-19 DOI: 10.1007/s00706-024-03200-9

K. P. Moulya, J. G. Manjunatha, Sameh M. Osman, Santanu Patra

{"title":"Electrochemical behavior and determination of pyridoxine at chemically modified carbon paste electrode by electropolymerization","authors":"K. P. Moulya, J. G. Manjunatha, Sameh M. Osman, Santanu Patra","doi":"10.1007/s00706-024-03200-9","DOIUrl":"https://doi.org/10.1007/s00706-024-03200-9","url":null,"abstract":"Pyridoxine and riboflavin can be determined individually or together using a carbon paste electrode modified by electropolymerization method with aspartic acid (PAMCPE). Using scanning electron microscopy, electrochemical impedance spectroscopy, differential pulse voltammetry, and cyclic voltammetry, the electrochemical behavior of pyridoxine was examined. The results of the studies showed that PAMCPE facilitates pyridoxine oxidation. The technique made it possible to determine pyridoxine and riboflavin simultaneously using cyclic voltammetry. The pH study showed that the good current response was observed at 6.5 pH; hence, it was chosen as the optimum for the analysis. The electrochemical reaction of pyridoxine is adsorption controlled with two-electron transfer process. Pyridoxine has a linear working range of 2.5–8.0 μM, with detection limit of 2.95 μM and limit of quantification of 9.85 μM. The developed modified electrode exhibits a number of benefits, including an easy preparation process, good stability, easy surface modification procedure, excellent reproducibility and repeatability. The practical applicability of PAMCPE for the detection of pyridoxine in pharmaceutical sample shows good sensitivity and selectivity.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140170901","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