Ocsana Opriş

Ocsana Opriş
National Institute for Research and Development of Isotopic and Molecular Technologies | INCDTIM · Department of Physics of Nanostructured Systems

PhD

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54
Publications
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679
Citations

Publications

Publications (54)
Article
Full-text available
In this study the adsorption and photodegradation capabilities of modified multi‐walled carbon nanotubes (MWCNTs), using tartrazine as a model pollutant, is demonstrated. MWCNTCOOH/Fe3O4 and MWCNT‐COOH/Fe3O4/NiO nanocomposites were prepared by precipitation of metal oxides in the presence of MWCNTs. Their properties were examined by X‐ray diffracti...
Article
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Abiotic stress agents, among them metal stress, can cause oxidative damage to plant cells. In defense, plants can increase the production of secondary metabolites in order to mitigate the harmful effects caused by them. The purpose of this work was to evaluate the effect of two types of copper salts (CuSO4 and Cu(NO3)2), added in two different amou...
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The purpose of this study was to evaluate the sun protection factor (SPF) of cosmetic emulsions with the addition of hydroalcoholic apple extract. First, the total polyphenolic content, the antioxidant activity and SPF properties of the extracts obtained by sonication and refluxing were evaluated. The two extraction methods were improved using the...
Article
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The article focuses on the optimization of the extraction process of biologically active compounds (BAC) from grape marc—a by-product of the wine industry. The influence of temperature, specifically 30 °C, 45 °C and 65 °C, and ethanol concentration in solutions, specifically 0–96% (v/v) on the extraction yield of polyphenols, flavonoids, tannins an...
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The present work aims to follow the influence of TiO2 nanoparticles (TiO2 NPs) on bioactive compounds, the elemental content of wheat, and on wheat leaves’ ultrastructure. Synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). The concentr...
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The problem of functional foods with bioactive components of natural origin is current for the food industry. Plant extracts rich in polyphenols with antioxidant and antimicrobial activity are a promising source for use in improving the quality and characteristics of fresh meat and meat products. In this context, the purpose of the present study wa...
Article
In this paper, the applicability of carboxylic functionalized carbon nanotubes modified with metal oxides of Fe and Mn (CNT-COOH/MnO2/Fe3O4) as adsorbent for the removal of two pesticides from aqueous solution in batch method was studied. The two pesticides studied were devrinol and triadimefon. Their adsorption on nanocomposite was studied in rela...
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Persistent pollutants such as pharmaceuticals, pesticides, musk fragrances, and dyes are frequently detected in different environmental compartments and negatively impact the environment and humans. Understanding the impacts of diffuse environmental pollutants on plants is still limited, especially at realistic environmental concentrations of conta...
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In the present study, the effects of copper oxide nanoparticles (CuO NPs) on bioactive compounds, the ultrastructural modifications which can occur, and elemental content of wheat were investigated. Changes in the wheat plants grown in presence or absence of CuO NPs were estimated. The application of CuO NPs decreased the amounts of chlorophylls an...
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Solidago virgaurea L. is a perennial plant used in European traditional medicine as a diuretic or a remedy for inflammatory conditions of the urinary tract but also for gout, especially in the Balkans. The present study was focused on a preclinical, in vivo evaluation of antihyperuricemic, anti-inflammatory, and antihypertensive effects of a dry ex...
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The main goal of this work consists of synthesis of new magnetic multifunctional nanoplatforms based on Fe@FePt core, with principal target in applications regarding the capture and separation of amino acids. These expectations were fulfill by attaching amino functional groups on the core surface. Therefore, our Fe@FePt@SiO2@NH2 core-shell nanopart...
Article
Biodiesel production is becoming more and more important lately and different methods for production are searched. Thus, biodiesel can be obtained from different vegetable oils or animal fats using catalysts. The aim of this research was to prepare the Fe3O4/MnO2 nanocomposite and test them as catalyst to efficiently obtain biofuel like the final p...
Article
More than we would like to admit, pharmaceutical products represent a high risk for the environment since, in the past decades, their concentration in natural, drinking, and irrigation waters reached concerning concentrations. The threat also resides in the fact that they tend to accumulate in edible plants and crops, and in the end, they could aff...
Article
The aim of this work was to obtain different extracts rich in polyphenols of the blackthorn by reflux and sonication and to test them in sunscreen formulation. In order to obtain the maximum content of polyphenols, a high antioxidant capacity and a high sun protection factor of these extracts, a central composite design was employed to optimize the...
Article
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Purpose The MnO2 nanoparticles, when used as catalyst, determine an enhanced reaction rate of the transesterifications process thus being very attractive for biodiesel production. One of the current limitations of the biofuel production by using MnO2 nanoparticles as catalyst is given by the reaction conditions. This work intends to improve the tra...
Article
The nanocomposite CNT-COOH/MnO2/Fe3O4 was synthesized and characterized by different techniques, namely X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, energy dispersive spectroscopy, thermogravimetric analysis, Brunauer-Emmett-Teller analysis, magnetic measurement, point o...
Article
In the present work, the effects of acetaminophen (paracetamol) on Phaseolus vulgaris L. and Triticum aestivum L. plants, two important vegetables in Romania, were studied. The treatment consisted of sowing the selected plant seed into soil watered with acetaminophen (100 mg kg‒1). The measurements of the foliage characteristics, photosynthetic pig...
Article
Aronia berries and grape marc, a by-product of producing wine, are rich in antioxidants. The aim of this work was to study the effects of powders and extracts of aronia berries and grape marc addition on physico-chemical quality indicators, microbiological stability in vitro, and antiradical activity of fondant candies, during storage. In order to...
Article
The global presence of pharmaceuticals in the environment has been particularly considered a concerning problem with unknown consequences. Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most frequently prescribed drugs in the world, and as a result, they are commonly found in different environmental compartments. In the present work,...
Article
The aim of this study was to evaluate the physico-chemical, microbiological, sensory properties and antioxidant activity of the functional cream cheese prepared with lipophilic extracts of sea buckthorn (Hippophae rhamnoides L.). The first step of the research consisted of an evaluation of the physico-chemical characteristics and the antioxidant ca...
Article
Objectives: The mechanisms of obesity-associated thyroid dysfunction in children are incompletely deciphered. We aimed to evaluate whether visceral adipose tissue (VAT), insulin resistance (IR), inflammation, oxidative stress (OS) are involved in thyroid morpho-functional changes in pubertal obese children. Methods: We recruited 43 obese pubertal c...
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Understanding the effects of many essential non-steroidal anti-inflammatory drugs (NSAIDs) on plants is still limited, especially at environmentally realistic concentrations. This paper presents the influence of three of the most frequently used NSAIDs (diclofenac, ibuprofen, and naproxen) at environmentally realistic concentrations on the autochth...
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In this data article, we present supplementary data related to the research article entitled "Starch-coated green synthesized magnetite nanoparticles for removal of textile dye Optilan Blue from aqueous media" Stan et al., 2019. Data interpretations are included in the related research article Stan et al., 2019. The synthesized starch-coated Fe3O4...
Article
Starch-coated Fe 3 O 4 magnetic nanoparticles were synthesized and tested as adsorbents for Optilan Blue dye removal from aqueous solutions. The four tested magnetite samples were prepared through an environmentally friendly synthetic route which uses water as solvent and biocompatible sodium bicarbonate as precipitating agent. In addition to the c...
Article
This study investigates the influence of microwave field derived from wireless router and mobile telephony sources on polyphenol content and antioxidant activity of basil. The total phenolic content of basil extracts was determined by Folin-Ciocalteu method. The amount of polyphenolic compounds in basil plants exposed to microwave irradiation was h...
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The present study evaluated the anti-gout potential of an ethanolic extract from Calluna vulgaris L. Hull (ECV). A preliminary phytochemical analysis of ECV was performed by spectrophotometric and HPLC-PDA-MS methods. Hypouricemic effect of ECV was tested in vivo using the oxonate-induced hyperuricemia model in rats, systolic blood pressure being a...
Article
Two types of magnetite (Fe3O4) nanoparticles were investigated as adsorbents for the simultaneous removal of Pb(II), Cd(II), and As(III) metal ions from aqueous solution. Magnetite nanoparticles were prepared by two synthesis procedures, both using water as solvent, and are referred to as conventional Fe3O4 nanoparticles and green Fe3O4 nanoparticl...
Article
In this study, the removal efficiency of Fe 3 O 4 (grf) and Fe 3 O 4 (koh) nanoparticles was compared with the removal efficiency of Fe 3 O 4 (chem). The characterization of all synthesized magnetic adsorbents was carried out using conventional techniques such as FT-IR, TEM, XPS and VSM. The dye removal was tested for all nanoparticle samples. The...
Article
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In the recent years, residual antibiotics are considered to be emerging environmental pollutants due to their continuous input and persistence into the aquatic ecosystem even at low concentrations. Therefore, these are necessary to develop efficient methods for the wastewater treatment. The present paper describes the efficiency of several types of...
Article
The present work highlights on efficacy of three types of green synthesized magnetite nanoparticles (Fe3O4 NPs) for the removal of a mixture of seven antibiotics, namely piperacillin (PIP), tazobactam (TAZ), sulfamethoxazole (SUL), tetracycline (TET), trimethoprim (TRI), ampicillin (AMP) and erythromycin (ERY) from aqueous media. Fe3O4 NPs were pre...
Article
Antimicrobial resistance represents a growing and significant public health threat, which requires a global response to develop effective strategies and mitigate the emergence and spread of this phenomenon in clinical and environmental settings. We investigated, therefore, the occurrence and abundance of several antibiotics and antibiotic resistanc...
Article
The aim of this study was to optimize the solid-phase extraction method of several antibiotics in order to determine their concentration in wastewater (influent and effluent) and manure samples. The selected antibiotics for the present study were ampicillin, ceftazidime, cefepime, imipenem, piperacillin/tazobactam, tetracycline, erythromycin, cipro...
Book
The guide is an output of the EnviroAMR project, implemented by the Institute of Biological Research Cluj-Napoca, branch of INCDSB Bucharest, as project promoter, in collaboration with the Biology and Geology Faculty from Babeș-Bolyai University Cluj-Napoca, with the Microbial diversity laboratory from the Norwegian University for Life Sciences and...
Article
A high-performance liquid chromatography (HPLC) method is reported for the determination of antibiotics in water. The antibiotics were simultaneously preconcentrated by solid-phase extraction. High-performance liquid chromatography was performed on a C18 modified column with gradient elution in 25 min at 40°C. The separation was carried out using g...
Article
Exposure to sustained low intensity microwaves can constitute a stress for the plants, but its effects on plant secondary chemistry are poorly known. We studied the influence of GSM and WLAN-frequency microwaves on emissions of volatile organic compounds and content of essential oil in the aromatic plant Ocimum basilicum L. hypothesizing that micro...
Article
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Textile dyes and antibiotics are two main classes of environmental pollutants which could be found in soil and water. Those persistent pollutants can have a negative influence on plant growth and development and affect the level of secondary metabolites. In the present work, we studied the effect of textile dyes and antibiotics on total leaf flavon...
Article
Hospitals produce large quantities of waste water that may contain various potentially hazardous materials. Moreover, these effluents usually do not undergo any specific treatment before being discharged into the urban sewage networks. As a consequence, a proper management of the hospitals effluents is vital. In the present study, the quality of th...
Article
The printing, textile, wood and plastics industries have an important environmental impact, since they consume large amounts of water and produce highly polluted waste waters (Sostar-Turk et al. 2005). The current study aimed to investigate several effluents generated by different industries based on their physicochemical parameters and to evaluate...
Article
The goal of this study was to develop and validate a high-performance liquid chromatography method for the quantification of two essential oil constituents (myristicin and linalool) from extracts of the three aromatic plants exposed to low-intensity microwave radiation. The analysis was performed by high-performance liquid chromatography using a mo...
Article
The goal of this study was to develop and validate a high-performance liquid chromatography method for the quantification of two essential oil constituents (myristicin and linalool) from extracts of the three aromatic plants exposed to low-intensity microwave radiation. The analysis was performed by high-performance liquid chromatography using a mo...
Article
Full-text available
The aim of the present work was to establish a proper high-performance thin-layer chromatographic (HPTLC) method for the quantification of linalool and myristicin from leaf extracts of parsley, dill, and celery grown in microwave fields. In order to establish the influence of stress induced by microwave irradiation on plants, the plants selected fo...
Article
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A high-performance thin-layer chromatography (HPTLC) method has been established for the analysis of α-phellandrene and β-pinene from dill (Anethum graveolens L.) extracts obtained by different extraction techniques and with different solvents and solvent mixtures. The HPTLC analyses were performed in a normal chromatographic chamber on silica gel...
Article
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This study is focused on the determination of some important antibiotics from different classes in waste water samples using solid phase extraction followed by high performance liquid chromatography with two detectors, diode array and mass spectrometer in positive ionisation mode. The investigated antibiotics include three penicillins (amoxicillin,...
Article
This study describes a procedure for the determination of two textile dyes (Nylosan Red N-2RBL-azo and Optilan Blue MF-GL-anthraquinone) from wastewater by solid phase extraction and liquid chromatography/electrospray ionization tandem mass spectrometry (SPE-LC/ESI-MS/MS) analysis. Four types of Strata SPE cartridges (C18-U, C18-E, WAX/NH2, and SAX...
Article
To gain insight into the effects of aqueous solutions of different dyes on plant performance and identify the most promising traits for fast assessment of toxicity, we studied the influences of two anthraquinone dyes (Optilan Blue and Lanasyn Blue) and four azo dyes (Lanasyn Red, Nylosan Red, Nylosan Dark Brown and Lanasyn Dark Brown) at two differ...
Article
Full-text available
Excessive use of antibiotics leads to their occurrence into the environment. In spite of their benefit properties and desired effects during the therapeutic applications, the same properties can be disadvantageous for the environment having negative influences over the plants and microorganisms and the potential risks for human health. Regarding th...
Article
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The objective of this paper is to report a procedure for the extraction and the determination of five textile dyes (Lanasyn Blue F-L 150, Lanasyn Dark Brown M-GLN, Lanasyn Red M-GA, Nylosan Dark Brown S-MBL, and Nylosan Red N-2RBL) which were not yet studied in literature by high-performance thin-layer chromatography. For SPE of these dyes, four ty...
Article
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The solvent movement under the influence of different forces (hydrostatic, centrifugal, gravitational, electrical, etc.) is essential in most of the industrial and laboratory processes. In our previous works, we used an electrohydrodynamic device to simulate the movements of some chromatographic solvents that are utilized in dielectrochromatography...
Article
Pharmaceutical residues in the environment, and their potential toxic effects, have been recognized as one of the emerging research area in the environmental chemistry. Antibiotics can reach plants from treated soil or due to irrigation. The flavonoids extraction from Triticum aestivum L. treated with ampicillin and separation of flavonoids are pre...
Article
Waste waters produced by the textile industry and the animal wastes from the intensive farming which are generally used for field irrigation are considered pollutant sources for the environment. These pollutants can be taken by soil and then by plants. The flavonoids are secondary metabolites of plants; therefore their determination in plants is ne...
Article
Full-text available
A new biosensor design, consisting in ascorbate oxidase (AOx) and bovine serum albumine immobilization on the membrane of an oxygen electrode, followed by cross-linking with glutaraldehyde (GA), was proposed for ascorbic acid (AA) determination. The biosensor was optimized regarding the enzyme loading and GA concentration. The best bioelectroanalyt...

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