Ovidius University Annals of Chemistry最新文献_第10页

Synthesis, characterization and antibacterial susceptibility testing of manganese complexes of doxycyline with bipyridine and phenanthroline 多西环素与联吡啶、菲罗啉锰配合物的合成、表征及抗菌药敏试验

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Ovidius University Annals of Chemistry Pub Date : 2019-07-01 DOI: 10.2478/auoc-2019-0013

J. Obaleye, O. Abosede

引用次数: 0

Assessing lead mobility rate from spent corroded and non-corroded bullets fragments on different soil types of tropical ecosystems 评估不同土壤类型热带生态系统中腐蚀和未腐蚀子弹碎片的铅迁移率

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Ovidius University Annals of Chemistry Pub Date : 2019-07-01 DOI: 10.2478/auoc-2019-0015

E. U. Etim

{"title":"Assessing lead mobility rate from spent corroded and non-corroded bullets fragments on different soil types of tropical ecosystems","authors":"E. U. Etim","doi":"10.2478/auoc-2019-0015","DOIUrl":"https://doi.org/10.2478/auoc-2019-0015","url":null,"abstract":"Abstract Lead ions mobility from spent metallic Pb bullets is under increasing scrutiny as a potential significant source of soil contamination. This study investigates effect of soil-properties types on Pb(II) mobility from spent corroded and non-corroded bullets and associated environmental risk using water, toxicity characteristic leaching procedure and synthetic precipitation leaching procedure as leaching techniques. From results, loamy soil properties (pH and organic matter-specific) apparently favored high mobility rate of Pb(II) (0.004 - 1.166 % Pb contamination) from spent bullets compared to sandy and clay soil types. Consequently, Pb(II) mobility from corroded bullet (0.035 - 1.166 %) was significant (p < 0.05) compared to non-corroded bullet (0.004 - 0.873 %) due largely to surface area differences. Percentage Pb contamination increased proportionally with bullet retention time in the different soils types. The experiment reported average decomposition rate of 6.9 g Pb/kg within a 28 weeks retention time. Leaching potential of Pb from spent bullet arising from water, toxicity characteristic leaching procedure and synthetic precipitation leaching procedure was quite significant (p < 0.05) in order of over 100 mg/L. Both toxicity characteristic leaching procedure-Pb and synthetic precipitation leaching procedure-Pb exceeded the 5 mg/L and 15 µg/L critical levels suggested by United State Environmental Protection Agency for Pb (II) mobility and hazardous classification. A significant positive correlation existed between corroded and non-corroded Pb (II) levels within each leaching solutions. Continued dissolution of metallic Pb (II) from spent Pb-bullets may be a mechanism for natural attenuation of Pb in soils. An important result of this study is the clear influence of soil properties on Pb mobility.","PeriodicalId":19641,"journal":{"name":"Ovidius University Annals of Chemistry","volume":"36 1","pages":"81 - 87"},"PeriodicalIF":0.9,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75926338","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

Antidiabetic, antioxidant and in silico studies of bacterial endosymbiont inhabiting Nephelium lappaceum L. 枸杞内共生细菌的抗糖尿病、抗氧化和硅研究。

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Ovidius University Annals of Chemistry Pub Date : 2019-07-01 DOI: 10.2478/auoc-2019-0017

Sridevi Chigurupati, S. Vijayabalan, A. Karunanidhi, Kesavanarayanan Krishnan Selvarajan, S. Nanda, R. Satpathy

{"title":"Antidiabetic, antioxidant and in silico studies of bacterial endosymbiont inhabiting Nephelium lappaceum L.","authors":"Sridevi Chigurupati, S. Vijayabalan, A. Karunanidhi, Kesavanarayanan Krishnan Selvarajan, S. Nanda, R. Satpathy","doi":"10.2478/auoc-2019-0017","DOIUrl":"https://doi.org/10.2478/auoc-2019-0017","url":null,"abstract":"Abstract Endophytes, notably obtaining attention, have been abided by potential origins of bioactive metabolites. In the acquaint study, endophyte was isolated from the leaves of Nephelium lappaceum L. The chosen endosymbiont was identified by 16s rRNA partial genome sequencing and investigated for their antioxidant and antidiabetic activities. A preliminary phytochemical test was comported for the affirmation of phytoconstituents in endophytic crude extract (NLM). Antioxidant activities were conducted by using 2-diphenyl-1-picrylhydrazyl (DPPH) method and 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) method to screen the radical scavenging potential. The evaluation of antidiabetic activities was done by using α-amylase and α-glucosidase inhibition assay. Qualitative phytochemical test on NLM affirmed the presence of phenols, carbohydrates, alkaloids, flavonoids, steroids, mucilage and glycosides. In silico parameters were also specified for antidiabetic activities. The antioxidant assay of NLM expressed proficient antioxidant activity of IC50±SEM 1.35±0.03 µg/mL and IC50±SEM 1.47±0.03 µg/mL, for ABTS and DPPH respectively. Antidiabetic assay results evidenced dose dependent percentage inhibition of the enzyme. The results testified estimable inhibition of α-amylase (IC50±SEM 2.549±0.08 µg/mL) and α-glucosidase inhibition (IC50±SEM 2.29±0.03µg/mL) compared to the standard drug (Acarbose). In silico study divulged that the ellagic acid component present in the plant was responsible for antidiabetic activity. Thus, the study shows that NLM has a wellspring of natural source of antioxidants and antidiabetic agents and furtherance of studies on its mechanism is recommended to know detailed facts.","PeriodicalId":19641,"journal":{"name":"Ovidius University Annals of Chemistry","volume":"3 1","pages":"95 - 100"},"PeriodicalIF":0.9,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84111451","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: 4

Adsorptive, inhibitive and thermodynamics studies on the corrosion of mild steel in the presence of Mangifera indica gums 芒果树胶对低碳钢腐蚀的吸附、抑制和热力学研究

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Ovidius University Annals of Chemistry Pub Date : 2019-07-01 DOI: 10.2478/auoc-2019-0014

H. F. Chahul, E. Maji, T. B. Danat

引用次数: 3

Phytochemical screening, thin-layer chromatography and antimicrobial activity study of Parquetina nigrescens leaf extracts 黑檀叶提取物的植物化学筛选、薄层色谱及抑菌活性研究

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Ovidius University Annals of Chemistry Pub Date : 2019-07-01 DOI: 10.2478/auoc-2019-0016

S. Adoga, Deborah Ehikowoicho Ekle, B. Kyenge, T. Aondo, C. Ikese

{"title":"Phytochemical screening, thin-layer chromatography and antimicrobial activity study of Parquetina nigrescens leaf extracts","authors":"S. Adoga, Deborah Ehikowoicho Ekle, B. Kyenge, T. Aondo, C. Ikese","doi":"10.2478/auoc-2019-0016","DOIUrl":"https://doi.org/10.2478/auoc-2019-0016","url":null,"abstract":"Abstract Parquetina nigrescens leaves have been used in traditional medicine as an important and highly efficacious herbal remedy and have been recommended as a potential source of antimicrobial agent. Three extracts of the plant obtained using n-hexane, methanol and water were used as solvents. Phytochemical analysis of the plant extracts showed important bioactive compounds such as flavonoids, saponins, tannins, terpenes, steroids, phenols and glycosides, but alkaloids were absent in all the three extracts. Agar disk diffusion method was used to study the antimicrobial activity of the extracts at different concentrations which showed activity against three gram negative bacteria Escherichia coli, Klebsiella pneumoniae and Proteus spp., one gram positive bacteria Staphylococcus aureus, and two fungus Aspergillus flavus and Candida albicans with zone of inhibition ranging from 5-15 mm for n-hexane extract, 6-16 mm for methanol extract and 1-11 mm for aqueous extract compared to zone of inhibition for the standard antibacterial drug, 0.5 mg/mL Streptomycin that ranges from 13 – 37 mm and the zone of inhibition for the standard antifungal drug 5 mg/mL fluconazole that ranges from 24 – 25 mm. Klebsiella pneumoniae was the most inhibited while E. coli was the least inhibited by the extract, and Candida albicans was found to be resistant to the extracts in all the concentrations. TLC finger-printing of the extracts using the solvent system – butanol : acetic acid : ethanol : distilled water in the ratio 50:10:10:30 showed spots with peaks different retention times ranging from 0.24 - 0.74 cm. The results provide justification for the use of the plants in folk medicine to treat various infectious diseases.","PeriodicalId":19641,"journal":{"name":"Ovidius University Annals of Chemistry","volume":"8 1","pages":"88 - 94"},"PeriodicalIF":0.9,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72511231","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

Quality assessment of tiger nut milk fortified with Moringa oleifera seed powder 辣木籽粉强化虎坚果奶的质量评价

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Ovidius University Annals of Chemistry Pub Date : 2019-07-01 DOI: 10.2478/auoc-2019-0019

A. R. Osaloni, Charles O. Arijeniwa, S. Bada, Elliot O. Seyifunmi

{"title":"Quality assessment of tiger nut milk fortified with Moringa oleifera seed powder","authors":"A. R. Osaloni, Charles O. Arijeniwa, S. Bada, Elliot O. Seyifunmi","doi":"10.2478/auoc-2019-0019","DOIUrl":"https://doi.org/10.2478/auoc-2019-0019","url":null,"abstract":"Abstract In this study, the effect of fortification of tiger nut milk with moringa seed on the microbial, nutritional and sensory quality of the local beverage was investigated. Fortification of tiger nut milk significantly (p ≤ 0.05) reduced the fungal load of the drink with 8.00 as against 17.00 in the control sample. The organisms isolated from the freshly prepared tiger nut milk blends were Bacillus subtilis, Micrococcus luteus, Saccharomyces cerevisiae, Aspergillus niger, Rhizopus stolonifer and Penicillum species. Further, fortified milk had higher moisture (78.51%), protein (2.97%) and lipid (2.01%) contents compared with the unfortified milk which had 76.83%, 2.11% and 1.45% respectively. Also, the ash, fiber and carbohydrate contents of the unfortified tiger nut milk were higher than that of the fortified tiger nut milk. Similarly, the fortified milk had higher level of all the minerals assessed than unfortified milk. In the sensory evaluation, tiger nut milk fortified with moringa seed had comparable rating to the unfortified milk in appearance, color, consistency and acceptability, but had a lower rating for taste and higher rating for aroma. These results suggest that moringa seed powder may be added to tiger nut milk to improve its nutritional quality.","PeriodicalId":19641,"journal":{"name":"Ovidius University Annals of Chemistry","volume":"5 1","pages":"108 - 112"},"PeriodicalIF":0.9,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78865864","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

AmpC beta-lactamase enzymes are ubiquitous in catfish (Clarias gariepinus) cultured in the Nigerian catfish grow-out pond systems AmpC β -内酰胺酶在尼日利亚鲶鱼生长池系统养殖的鲶鱼(Clarias gariepinus)中普遍存在

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Ovidius University Annals of Chemistry Pub Date : 2019-01-01 DOI: 10.2478/auoc-2019-0005

F. I. Akinnibosun, O. Imade

{"title":"AmpC beta-lactamase enzymes are ubiquitous in catfish (Clarias gariepinus) cultured in the Nigerian catfish grow-out pond systems","authors":"F. I. Akinnibosun, O. Imade","doi":"10.2478/auoc-2019-0005","DOIUrl":"https://doi.org/10.2478/auoc-2019-0005","url":null,"abstract":"Abstract This research was performed to ascertain the ubiquity of bacterial pathogens which hyper-produced AmpC β-lactamase enzymes in adult catfish cultured in the Nigerian catfish grow-out pond systems. Phenotypic and molecular methods were used to isolate and identify bacterial pathogens that hyper-produced AmpC β-lactamase enzymes. The AmpC β-lactamase enzymes produced by the bacterial pathogens were subsequently characterized by BLASTX and RPS-BLAST bioinformatics software as well as with the Cn3D molecular modelling software. Findings from the present study indicated that pathogenic bacterial strains which hyper-produced the AmpC β-lactamase enzymes were isolated from 49 catfish samples out of the 54 catfish samples which were examined. The pathogenic bacterial strains were mainly identified as Citrobacter freundii MGH 150, Enterobacter cloacae NG 14, and Enterobacter cloacae subspecies dissolvens HKE 15. The AmpC β-lactamase enzymes produced by the bacterial pathogens were also respectively identified as cephalosporinase hydrolyzing class C CMY-LAT-MOX-ACT-MIR-FOX, CMY2/MIR/ACT/EC family class C beta-lactamase, and CMY2/MIR/ACT/EC family class C beta-lactamase. The presence of AmpC enzymes that are hyper-produced by bacterial pathogens which were isolated from almost all the catfish examined calls for urgent monitoring/surveillance of the Nigerian catfish ponds by the relevant regulatory agencies.","PeriodicalId":19641,"journal":{"name":"Ovidius University Annals of Chemistry","volume":"33 1","pages":"25 - 28"},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74642743","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

Influence of Cissus populnea stem extract on kinetics and thermodynamics of mild steel corrosion in acidic medium 西芹茎提取物对酸性介质中低碳钢腐蚀动力学和热力学的影响

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Ovidius University Annals of Chemistry Pub Date : 2019-01-01 DOI: 10.2478/auoc-2019-0003

H. F. Chahul, David T. Orhemba, T. Gbadamosi

引用次数: 4

Batch washing of lead contaminated and spiked soils using extracts of dried Terminalia mantaly, Panicum maximum and Eleusine indica plants 用干燥的天竺葵、大洋参和莲花植物提取物批量清洗铅污染和尖刺土壤

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Ovidius University Annals of Chemistry Pub Date : 2019-01-01 DOI: 10.2478/auoc-2019-0006

E. U. Etim

{"title":"Batch washing of lead contaminated and spiked soils using extracts of dried Terminalia mantaly, Panicum maximum and Eleusine indica plants","authors":"E. U. Etim","doi":"10.2478/auoc-2019-0006","DOIUrl":"https://doi.org/10.2478/auoc-2019-0006","url":null,"abstract":"Abstract Application of dried plant water soluble extracts in soil Pb decontamination is rear, but advantageous due to their ecological biodegradability. Single batch laboratory scale suitability of Terminalia mantaly, Panicum maximum, Eleusine indica and water as washing solutions for Pb removal from contaminated and spiked soils at different soil pulp densities (3%, 6%, 9%, 12%, 15% and 18%) and washing time (1, 3, 6, 12, 24 and 96 h) was investigated. Washings of Terminalia mantaly and Panicum maximum proved more efficient comparatively for contaminated soil with Pb removal efficiency of 27.2±0.64% and 27.0±0.52% respectively at 3% soil pulp density and washing time of 96 h. Removal efficiency increased with increasing washing time but decreased with increasing of soil pulp density. Furthermore, water was found effective for removing Pb from spiked soils with maximum removal efficiency of 74.5±3.38% at 3% soil pulp density after 1 h washing. High exchangeable fraction of Pb (81.2%) in spiked soil makes water more suitable against other washing solutions. Statistical t-testing showed significant difference in Pb removal efficiency between contaminated and spiked soils for all four washing solutions, reflecting differences in geochemical phases of Pb in both soils. Terminalia mantaly and Panicum maximum showed promising result in soil washing and have potential for application in Pb removal from contaminated soils. However, chemical modifications are needed to enhance and improve on their efficiencies. Similarly, more information is needed to predict and model removal efficiencies when multiple washing steps are applied.","PeriodicalId":19641,"journal":{"name":"Ovidius University Annals of Chemistry","volume":"2 1","pages":"29 - 36"},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78338902","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

The evaluation of kinetic parameters for cadmium doped Co-Zn ferrite using thermogravimetric analysis 用热重分析法评价镉掺杂Co-Zn铁氧体的动力学参数

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Ovidius University Annals of Chemistry Pub Date : 2019-01-01 DOI: 10.2478/auoc-2019-0011

A. Kulkarni, S. Mathad, Raghavendra P. Bakale

引用次数: 6