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Studia Universitatis Babes-Bolyai Chemia
Scopus
ISSN 1224-7154 · Babes-Bolyai University · 997 artikel di indeks
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Artikel Jurnal
ELECTROSPINNING-ASSISTED SYNTHESIS OF CRYSTALLINE INDIUM TIN OXIDE (ITO) PARTICLES WITH A CUBIC BIXBYITE-TYPE STRUCTURE
Electrospun indium tin oxide (ITO) structures face challenges with high-temperature calcination, dopant homogeneity, and reduced electrical conductivity due to porosity and grain boundaries. However, ongoing advances in precursor design and post-treatment strategies afford promising routes to…
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A Zn(Ⅱ) COORDINATION COMPOUND BASED ON 2,2'-BIPYRIDINE AND 3-CARBOXY-1-CARBOXYMETHYL-2-OXIDOPYRIDINIUM: SYNTHESIS, STRUCTURE AND HIRSHFELD ANALYSIS
A new coordination compound [Zn(bpy)(L)]2·6H2O was synthesized by 2,2'-bipyridine (bpy), 3-carboxy-1-carboxymethyl-2-oxidopyridinium (H2L) and Zn(II) as starting materials under solvothermal conditions. Single-crystal X-ray diffraction shows that the compound is ultimately assembled from a…
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BENZO[d]OXAZOLE DERIVATIVES FUNCTIONALIZED WITH REACTIVE GROUPS
A series of compounds having a benzoxazole moiety in their structure have been synthesized starting from 6-hydroxy-2-methylbenzo[d]oxazole, whose preparation through the Beckmann rearrangement of resacetophenone oxime is described. First, substitution with bromine and chlorine of the aforementioned…
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ELECTROCHEMICAL EVALUATION OF CUCURBITA PEPO LEAF EXTRACT AS A GREEN CORROSION INHIBITOR
Corrosion of iron in acidic media remains a major industrial challenge, creating a need for environmentally friendly corrosion inhibitors. In this study, the corrosion inhibition performance of Cucurbita pepo leaf extract as a surface pretreatment for mild iron electrodes in 1 M HCl was evaluated…
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REVISITING SURFACTANT-INDUCED EVAPORATION SUPPRESSION THROUGH QUANTITATIVE REANALYSIS OF REVERSED-FLOW GAS CHROMATOGRAPHY DATA
Surfactant-induced evaporation suppression has traditionally been interpreted in terms of increasing monolayer surface coverage. However, the physical significance of this interpretation at concentrations exceeding nominal monolayer coverage remains uncertain. In this study, the complete…
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COMPARATIVE EVALUATION OF DESIGN OF EXPERIMENTS TECHNIQUES FOR YELLOW OLEANDER BIODIESEL PRODUCTION
This study optimized biodiesel production from yellow oleander (Thevetia peruviana) oil using eggshell-derived CaO nanocatalysts through an integrated Design of Experiments (DoE) approach. A full factorial design (FFD), Taguchi analysis, and response surface methodology based on the Box–Behnken…
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RAPID AND COST-EFFECTIVE UV–VIS APPROACH FOR SULFUR DETERMINATION: A COMPARATIVE STUDY WITH EDXRF AND ICP-OES REFERENCE VALUES
The determination of sulfur content in extreme pressure (EP) additives is important for evaluating their performance and quality in lubrication systems. In this study, the feasibility of a rapid and cost-effective UV–Vis spectrophotometric approach was evaluated for estimating sulfur in sulfurized…
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CHEMOMETRIC OPTIMIZATION OF OXYGEN FLASK COMBUSTION FOR CADMIUM DETERMINATION IN CHOCOLATE BY GF-AAS
Cadmium is a toxic trace element that may accumulate in cocoa-derived products, requiring reliable methods for its determination. Oxygen flask combustion (OFC) was optimized as a sample preparation technique for cadmium determination in chocolate by graphite furnace atomic absorption spectrometry…
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A RAPID SPECTROPHOTOMETRIC ASSAY FOR THE DETERMINATION OF ASCORBIC ACID IN TEA SAMPLES USING GREEN SYTHESIZED GOLD NANOPARTICLES
The present study reports the green synthesis of gold nanoparticles using Rară Neagră red wine as a natural source of reducing and stabilizing agents. The synthesis approach exploits the rich content of phenolics and flavonoids in the wine, eliminating the use of hazardous chemical reagents. The…
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AN ANILINE HYDROGEN PHTHALATE BASED UV-VIS ASSAY FOR THE DETERMINATION OF GLUCOSE
Rapid, easy and reliable glucose determination remains of paramount importance, be it in the context of clinical, research or industrial laboratories. Here we present a UV-vis adaptation for the determination of glucose based on a traditional paper chromatography method for glucose visualisation…
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IN VITRO ANTIOXIDANT AND ANTI-HEMOLYTIC ACTIVITY OF LOPHANTUS TURCICUS AND ITS PHENOLIC AND VITAMIN COMPOSITION
The aim of this study was to determine the natural antioxidant properties of endemic Lophanthus turcicus (Nepeta turcica) based on its phenolic compound and vitamin content. Phenolic compounds and vitamins were determined by HPLC, while radical scavenging, Fe²⁺ chelating, and anti-hemolytic…
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A MOLECULAR DOCKING AND MOLECULAR DYNAMICS STUDY OF SEC-BUTYLBENZYL MANNOSIDES AS POTENTIAL FIMH ANTIADHESIVE AGENTS
The present work reports a computational study of three proposed molecules as potential antiadhesive agents targeting the FimH protein of Escherichia coli, and compares them with a molecule previously reported to have a higher binding affinity for this protein than mannosegive me. The aim of this…
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EFFECT OF TRACE SILICON ON THE PROPERTIES OF IRON-BASED HETEROGENEOUS FENTON CATALYSTS
It is an important task for modifying heterogeneous Fenton catalysts to effectively degrade organic pollutants in water. Most studies have modified heterogeneous Fenton catalysts through addition of other metal active species. Here, a series of Si-Fe/γ-Al2O3 (x, x = Si/Fe mass ratio per gram of…
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PARAMETRIC STUDY AND OPTIMIZATION OF D-GLUCOSE ISOMERIZATION USING SWEETZYME IT: A FACTORIAL DESIGN APPROACH
High-fructose corn syrup (HFCS) is produced industrially by the immobilized glucose isomerase Sweetzyme IT (from Streptomyces murinus), one of the most widely used biocatalysts in the food industry. Although its individual operating parameters are well established, simultaneous interactions between…
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APPARENT BIOACCESSIBILITY OF PHENOLIC COMPOUNDS AND LYCOPENE FROM TOMATO POMACE DURING STATIC IN VITRO DIGESTION
Tomato pomace, a major by-product of industrial tomato processing composed mainly of peels and seeds, represents a valuable source of bioactive compounds with potential nutraceutical applications. This study comparatively evaluated the apparent bioaccessibility of phenolic compounds and lycopene…
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VALIDATED UAE-GC-MS-SIM ANALYSIS OF PCBs IN SOILS: FROM METHOD PERFORMANCE TO HOMOLOGUE AND CONGENER PATTERNS
Polychlorinated biphenyls (PCBs) are persistent organic pollutants that accumulate in soils, making their reliable determination in this complex matrix analytically challenging. This study presents the validation of a method based on ultrasound-assisted extraction (UAE) coupled with gas…
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PHOTOCHEMICAL SELF-PURIFICATION OF AQUATIC SYSTEMS IN THE PRESENCE OF VITAMIN B₆
Vitamin B6 (pyridoxine, PN) released from anthropogenic and biogenic activities can influence the chemical self-purification of surface waters through its photochemical transformations. The present study aimed to investigate the kinetics and mechanisms of pyridoxine photodegradation under…
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GREEN SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF IRON OXIDE NANOPARTICLES FROM ROBINIA PSEUDOACACIA L. FRUITS FOR DYE REMOVAL FROM AQUEOUS SOLUTIONS
In this study, iron oxide nanoparticles were produced and characterized using a green synthesis method with Robinia pseudoacacia fruits. The structural and functional properties of the nanoparticles were investigated using XRD, TEM/EDX, and FTIR analyses. The results indicated that the produced…
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EVIDENCE OF ABNORMAL HIGH SILVER CONTENT IN A POLISH POLTORAK COIN ISSUED IN 1624 AS CONSEQUENCE OF ADVANCED COPPER CORROSION
Long ground resting of coins small denomination might affect their microstructure due to advanced corrosion. It is well known that cleaning of silver-copper alloy artifacts leads to a surface enrichment of the silver amount due to the partial removal of the copper grains which are more corroded. We…
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EFFECT OF MEDIUM-RANGE TEMPERATURES ON THE CONVECTIVE DRYING KINETICS OF CELERY LEAVES AND STEMS
This work focuses on the comparative description of convective thin-layer drying of celery leaves and stalks at 40, 50 and 60oC, respectively. Close to 100% moisture loss was recorded, yet total process time shortens at elevated temperatures. The adjusted determination coefficient, the root mean…