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Annals of the University of Craiova Series Chemistry最新文献

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Influence of harvest time on carbohydrates content of Jerusalem artichoke (Helianthus tuberosus L.) tubers 采收时间对菊芋块茎碳水化合物含量的影响
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.02
C. Babeanu, G. Matei
{"title":"Influence of harvest time on carbohydrates content of Jerusalem artichoke (Helianthus tuberosus L.) tubers","authors":"C. Babeanu, G. Matei","doi":"10.52846/aucchem.2022.2.02","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.02","url":null,"abstract":"Jerusalem artichoke is promoted as a plant with great potential for use due to its specific chemical composition, having inulin as a reserve carbohydrate, unlike other plants that contain starch. Because the tubers deteriorate very easily during storage, it is recommended that the harvest be carried out according to use. In this work the soluble solids, inulin and reducing sugars content of three Jerusalem artichoke cultivars (Dacic, Rares and Dabuleni) grown at Agricultural Research Development Station Caracal was evaluated at two harvest times (autumn and spring). The obtained results show that the studied chemical indices vary depending on the analyzed cultivar and the stage of plant development. The tubers of the experimented Jerusalem artichoke cultivars present appreciable content of soluble solids and inulin at both harvest times. In all investigated cultivars, tubers harvested in spring have lower content of inulin and soluble solids and higher content of reducing sugars than those harvested in autumn.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"14 6 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123694461","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
Biochemical and growth effects of silver in wheat plants
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.06
Georgeta Ciobanu, C. Ionescu
{"title":"Biochemical and growth effects of silver in wheat plants","authors":"Georgeta Ciobanu, C. Ionescu","doi":"10.52846/aucchem.2022.2.06","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.06","url":null,"abstract":"Our experiments on the cultivation of wheat plants in the laboratory, on nutrient solutions supplemented with AgNO3, showed that the exposure to Ag+ at concentrations of 10 mmol×L-1 and 100 mmol×L-1 for 7 days led to growth inhibition and modification of certain biochemical indices, compared to control plants. The observed differences concerned the activity of soluble peroxidases and the degree of lipid peroxidation in the roots of wheat plants, as well as the quantity of chlorophylls in their leaves. These results may reflect both a toxic effect and a regulatory role of silver in plants.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125142899","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
Phytochemical screening of the methanolic extract of Passiflora incarnata L. 西番莲甲醇提取物的植物化学筛选。
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.05
M. Dumitru, A. Gănescu
{"title":"Phytochemical screening of the methanolic extract of Passiflora incarnata L.","authors":"M. Dumitru, A. Gănescu","doi":"10.52846/aucchem.2022.2.05","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.05","url":null,"abstract":"The aim of this work is to carry out a phytochemical screening of extracts of Passiflora incarnata L. to know the composition of secondary metabolites and to better understand the pharmacodynamic properties of its extracts. Phytochemical screening of the methanolic extract of Passiflora incarnata indicates the presence of the following phytochemicals: Tannins, Alkaloids, Flavonoids, Carbohydrates, Terpenoids, Steroids, Polyphenols and Phytosterols. Saponins, Resin, Fixed oils and fats and Quinones weren’t detected.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115370398","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
Antimicrobial activity study of some binuclear complexes of Cu(II), Ni(II) and Co(II) with a new Schiff base (1,3-bis[ortho-(2-carboxy-phenyliminomethyl)-phenoxy]propane) Cu(II)、Ni(II)和Co(II)与新型希夫碱(1,3-双[邻基-(2-羧基-苯基氨基甲基)-苯氧基]丙烷的双核配合物的抗菌活性研究
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.03
F. Ciolan
{"title":"Antimicrobial activity study of some binuclear complexes of Cu(II), Ni(II) and Co(II) with a new Schiff base (1,3-bis[ortho-(2-carboxy-phenyliminomethyl)-phenoxy]propane)","authors":"F. Ciolan","doi":"10.52846/aucchem.2022.2.03","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.03","url":null,"abstract":"In this work, the antimicrobial activity of some complexes of Cu(II), Ni(II) and Co(II) with a new Schiff base (1,3-bis[ortho-(2-carboxy-phenyliminomethyl)-phenoxy]propane) tested on five microbial strains, is presented. The antimicrobial activity of the tested compounds was evaluated from a quantitative point of view, as well as the resistance of the microbial biofilms developed on an inert substrate.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123087978","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
Fenton degradation of azo dyes 偶氮染料的Fenton降解
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.08
M. Drăgoi
{"title":"Fenton degradation of azo dyes","authors":"M. Drăgoi","doi":"10.52846/aucchem.2022.2.08","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.08","url":null,"abstract":"This review provides a general idea of Fenton oxidation of azo dyes. The effect of temperature or initial pH on the degradation process of some azo dyes in aqueous solution was investigated. From this study, it can be concluded that Fenton oxidation process is an effective method for azo dye removal.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132099719","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
Research on three complex compounds of divalent first-row transition metal ions having the Schiff base derived from sulfanilamide and N-acetylisatin as bidentate ligand 以磺胺和n -乙酰化苷为双齿配体，衍生出希夫碱二价第一行过渡金属离子络合物的研究
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.01
L. Sbîrnă, C. Moldovan
{"title":"Research on three complex compounds of divalent first-row transition metal ions having the Schiff base derived from sulfanilamide and N-acetylisatin as bidentate ligand","authors":"L. Sbîrnă, C. Moldovan","doi":"10.52846/aucchem.2022.2.01","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.01","url":null,"abstract":"The present paper aims to describe the research performed on three complex compounds formed by divalent first-row transition metal ions – namely M = Co(II), Ni(II) and Zn(II) (representing the complex kernels) with the Schiff base derived from the condensation of sulfanilamide with N-acetylisatin (which proved itself to be able to act as a bidentate ligand in all these cases). This Schiff base is N-(1-acetyl-2-oxoindolin-3-ylidene)-4-aminobenzenesulfonamide, which appears twice in each complex, but is not the only ligand in the structure, as two water molecules are also part of the coordination sphere; there also is an ionization sphere, represented by two chloride ions whose role is to equilibrate the electrical charge of the complex kernel (all the ligands being charge-free) – the general molecular formula of the complexes being thus: [ML2(H2O)2]Cl2. From the electrical point of view, we dealt with three complex compounds that all showed themselves to be electrolytes. As far as magnetic properties are concerned, two of them proved themselves to be paramagnetic, whereas the last one was found to be diamagnetic. After adding different spectral data, corroborating them with the prior information and with the elemental analysis – we have drawn the conclusion that the complexes are six-coordinated, so they all will tend to adopt an octahedral geometry.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"15 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127517943","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
New nanocomposites based on silica and the growth substrate of Pleurotus ostreatus with applications in adsorption processes 基于二氧化硅和平菇生长基质的纳米复合材料及其在吸附过程中的应用
Annals of the University of Craiova Series Chemistry Pub Date : 2022-12-20 DOI: 10.52846/aucchem.2022.2.07
Andreea Eliescu, N. Cioateră, M. Mureșeanu
{"title":"New nanocomposites based on silica and the growth substrate of Pleurotus ostreatus with applications in adsorption processes","authors":"Andreea Eliescu, N. Cioateră, M. Mureșeanu","doi":"10.52846/aucchem.2022.2.07","DOIUrl":"https://doi.org/10.52846/aucchem.2022.2.07","url":null,"abstract":"The present study aimed at the synthesis and characterization of new biosorbents by modifying the POBM (growth substrate of the macromycete Pleurotus ostreatus) using a commercial silica (DAVICAT 1452) in order to improve the absorbtion properties and the thermal, chemical and mechanical stability of the biosorbents which were presented in a previous study. In order to select the sorbent with the best performance, nanocomposites based on silica and biomass were obtained by different methods. The efficiency of the materials was tested for the removal of Cd(II) ions from aqueous solutions. The maximum capacity and rate of adsorption were for the biosorbent calcinated at 5500C after material synthesis and they were comparable with similar materials presented in the specialised literature.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114419854","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
The use of X-ray spectrometry in forensic expertise. Dental alloy control x射线光谱法在法医鉴定中的应用。牙科合金控制
Annals of the University of Craiova Series Chemistry Pub Date : 2022-09-15 DOI: 10.52846/aucchem.2022.1.06
Adina Bunget, M. D. Bîcă, Iuliana Carmen Bărbăcioru, L. Chirigiu, L. Chirigiu
{"title":"The use of X-ray spectrometry in forensic expertise. Dental alloy control","authors":"Adina Bunget, M. D. Bîcă, Iuliana Carmen Bărbăcioru, L. Chirigiu, L. Chirigiu","doi":"10.52846/aucchem.2022.1.06","DOIUrl":"https://doi.org/10.52846/aucchem.2022.1.06","url":null,"abstract":"The analysis of dental materials in forensic investigations is very important. Identifying the victims of accidents or attacks sometimes requires the analysis of their dentures. In this paper, X-ray spectrometry was used as a method to determine the chemical composition of a dental material. In this case, it was established that it was a dental alloy (Cr-Ni-Mo) with a percentage composition of 23.58% Cr, 64.32% Ni and 10.82% Mo.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129646084","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: 1
Assessment of the metal content in seawater and sediments (Coastal Area of the Black Sea) 海水和沉积物中金属含量的评估(黑海沿岸地区)
Annals of the University of Craiova Series Chemistry Pub Date : 2022-09-15 DOI: 10.52846/aucchem.2022.1.08
Anda Tenea, C. Dinu, M. Mureșeanu
{"title":"Assessment of the metal content in seawater and sediments (Coastal Area of the Black Sea)","authors":"Anda Tenea, C. Dinu, M. Mureșeanu","doi":"10.52846/aucchem.2022.1.08","DOIUrl":"https://doi.org/10.52846/aucchem.2022.1.08","url":null,"abstract":"The aim of this study was to develop a method for simultaneous determination of Cd, Cr, Cu, Fe, Mn, Ni and Zn from saline matrices (seawater and sediments) using the ICP-EOS technique. The developed method has quantification limits between 3.6÷11.7 µg·L−1, precision expressed in RSD < 6%, recovery tests in the range of 90÷115%. The evaluation of 38 seawater samples taken from the Black Sea area indicated that some metals were below the limit of determination of the applied method (Cd, Mn and Ni), others were below the maximum value allowed by the Order 161/2006 (Cr, Fe). Copper exceeded the maximum allowed limit only in 2 analyzed samples and Zn exceeded the maximum allowed concentration according to the current legislation in 50% of the analyzed samples. For the sediment samples, a certified reference material sediment-type with low metal and organic matter content purchased from LGC was used in the validation process.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122182381","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
Comparison between the chemical behaviors of different complex compounds formed by divalent transition metal ions with a heterocyclic ligand, leading to different structures 由二价过渡金属离子与杂环配体形成不同结构的配合物的化学行为比较
Annals of the University of Craiova Series Chemistry Pub Date : 2022-09-15 DOI: 10.52846/aucchem.2022.1.03
L. Sbîrnă, C. Moldovan
{"title":"Comparison between the chemical behaviors of different complex compounds formed by divalent transition metal ions with a heterocyclic ligand, leading to different structures","authors":"L. Sbîrnă, C. Moldovan","doi":"10.52846/aucchem.2022.1.03","DOIUrl":"https://doi.org/10.52846/aucchem.2022.1.03","url":null,"abstract":"The main purpose of the present paper is to identify the structures for the complexes formed by six divalent transitional metal ions (namely Ni(II), Pd(II), Pt(II), Zn(II), Cd(II) and Hg(II)) with the same heterocyclic ligand, that is able to change the coordination manner, consequently affecting the structure of the respective complex compound.","PeriodicalId":183805,"journal":{"name":"Annals of the University of Craiova Series Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121037673","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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