Explanipedia

Iron–Carbonate (Bi, Cu, Li) Composites with Antimicrobial Activity After Silver(I) Ion Adsorption Open

Alexandra Berbentea, Mihaela Ciopec, Adina Negrea, Petru Negrea, Nicoleta Sorina Nemeș , et al. · 2025

In the present study three composite materials based on iron in combination with bismuth, copper or lithium carbonates FeNO3@Li2CO3 (SFL), FeNO3@CuCO3 (SFC), and FeNO3@(BiO)2CO3 (SFB) were synthesized by coprecipitation. The purpose was to…

Lanthanum Recovery from Aqueous Solutions by Adsorption onto Silica Xerogel with Iron Oxide and Zinc Oxide Open

Ionuţ Bălescu, Mihaela Ciopec, Adina Negrea, Nicoleta Sorina Nemeș, Cătălin Ianași , et al. · 2025

From the lanthanide group, part of the rare earth elements (REEs), lanthanum is one of the most important elements given its application potential. Although it does not have severe toxicity to the environment, its increased usage in advanc…

Functionalized Biopolymer for Enhanced Pt(IV) Recovery from Aqueous Solutions Open

Theodora Babău, Mihaela Ciopec, Giannin Moșoarcă, Cosmin Vancea, Adina Negrea , et al. · 2025

In this study, chitosan (Chi) functionalized with the amino acid serine (Ser) was synthesized for the adsorption-based recovery of Pt(IV) from aqueous solutions. To identify the active functional groups of the amino acid and the support ma…

Copper Nanoparticles Synthesized by Chemical Reduction with Medical Applications Open

Alexandra Pricop, Adina Negrea, Bogdan Pascu, Nicoleta Sorina Nemeș, Mihaela Ciopec , et al. · 2025

Copper nanoparticles (CuNPs) have attracted attention due to their low cost and high specific surface area. In this work, a simple and inexpensive two-step synthesis method was proposed to prepare highly stable and well-dispersed spherical…

Synthesis of Some Eco-Friendly Materials for Gold Recovery Open

Theodora Babău, Mihaela Ciopec, Narcis Duţeanu, Adina Negrea, Petru Negrea , et al. · 2024

The aim of this study was to develop new materials with adsorbent properties that can be used for the adsorption recovery of Au(III) from aqueous solutions. To achieve this result, it is necessary to obtain inexpensive adsorbent materials …

Advanced Photocatalytic Degradation of Cytarabine from Pharmaceutical Wastewaters Open

Alexandra Berbentea, Mihaela Ciopec, Narcis Duţeanu, Adina Negrea, Petru Negrea , et al. · 2024

The need to develop advanced wastewater treatment techniques and their use has become a priority, the main goal being the efficient removal of pollutants, especially those of organic origin. This study presents the photo-degradation of a p…

Adsorption of Scandium Ions by Amberlite XAD7HP Polymeric Adsorbent Loaded with Tri-n-Octylphosphine Oxide Open

Diana Daminescu, Narcis Duţeanu, Mihaela Ciopec, Adina Negrea, Petru Negrea , et al. · 2024

In an actual economic context, the demand for scandium has grown due to its applications in top technologies. However, further development of new technologies will lead to an increase in the market for Sc related to such technologies. The …

Evaluation of Functionalized Amberlite Type XAD7 Polymeric Resin with L-Valine Amino Acid Performance for Gallium Recovery Open

Cosmin Vancea, Loredana Ciocărlie, Adina Negrea, Giannin Moșoarcă, Mihaela Ciopec , et al. · 2024

Given the ever-increasing demand for gallium(III) as a crucial precursor in the fabrication of advanced materials, there arises an imperative to devise efficient recovery processes from primary and secondary sources. In the present investi…

Kinetic Modelling the Solid–Liquid Extraction Process of Scandium from Red Mud: Influence of Acid Composition, Contact Time and Temperature Open

Diana Daminescu, Narcis Duţeanu, Mihaela Ciopec, Adina Negrea, Petru Negrea , et al. · 2023

Industry represents a fundamental component of modern society, with the generation of massive amounts of industrial waste being the inevitable result of development activities in recent years. Red mud is an industrial waste generated durin…

Formulation, Physico-Chemical Characterization, and Evaluation of the In Vitro Release Capacity of the Ruta graveolens L. Phytocomplex from Biodegradable Chitosan and Alginate Microspheres Open

Olimpia Daniela Frenț, Laura Grațiela Vicaș, Narcis Duţeanu, Nicoleta Sorina Nemeș, Bogdan Pascu , et al. · 2023

The objective of this study was to develop microspheres (Ms) from natural materials, chitosan (Ch) and sodium alginate (Na-Alg), that protect Ruta graveolens L. (RG) extract against temperature, pH, and the oxidative impact of degradation.…

Synthesis, Characterization and Antimicrobial Activity of Multiple Morphologies of Gold/Platinum Doped Bismuth Oxide Nanostructures Open

Cătălin Ianași, Nicoleta Sorina Nemeș, Bogdan Pascu, Radu Lazău, Adina Negrea , et al. · 2023

Bismuth oxides were synthesized from bismuth carbonate using the sol-gel method. Studies have described the formation of Bi2O3, as a precursor of HNO3 dissolution, and intermediate oxides, such as BixOy when using H2SO4 and H3PO4. The aver…

Study of the Influence of the Excipients Used for the Synthesis of Microspheres Loaded with Quercetin: Their Characterization and Antimicrobial Activity Open

Olimpia Daniela Frenț, Daniel Marius Duda-Seiman, Laura Grațiela Vicaș, Narcis Duţeanu, Nicoleta Sorina Nemeș , et al. · 2023

The aim of this study was to determine the potential pharmaceutical applications of quercetin—a natural flavonoid compound with a polyphenolic structure—following its encapsulation in polymeric microspheres resistant to degradation. The mi…

Synthesis and Characterization of Amorphous SiO2−FexOy Materials Starting from Iron Sulfate for Preliminary Studies of CO2 Adsorption Open

Cătălin Ianăşi, Bogdan Pascu, Nicoleta Sorina Nemeș, Alexandru Popa · 2023

The goal of this work is to investigate the effectiveness of amorphous SiO2−FexOy loaded by functionalization with Ce(SO4)2, Li2SO4, and 3-aminopropyltriethoxysilane (APTES) for CO2 adsorption. Silica and iron-based materials are gaining p…

Silver Nanoparticle Synthesis via Photochemical Reduction with Sodium Citrate Open

Bogdan Pascu, Adina Negrea, Mihaela Ciopec, Narcis Duţeanu, Petru Negrea , et al. · 2022

The aim of this paper is to provide a simple and efficient photoassisted approach to synthesize silver nanoparticles, and to elucidate the role of the key factors (synthesis parameters, such as the concentration of TSC, irradiation time, a…

A Green, Simple and Facile Way to Synthesize Silver Nanoparticles Using Soluble Starch. pH Studies and Antimicrobial Applications Open

Bogdan Pascu, Adina Negrea, Mihaela Ciopec, Narcis Duţeanu, Petru Negrea , et al. · 2021

Along with the progress of nanoscience and nanotechnology came the means to synthesize nanometric scale materials. While changing their physical and chemical properties, they implicitly changed their application area. The aim of this paper…

New Generation of Antibacterial Products Based on Colloidal Silver Open

Bogdan Pascu, Adina Negrea, Mihaela Ciopec, Corneliu Mircea Davidescu, Petru Negrea , et al. · 2020

The main objective of the present paper is the green synthesis of colloidal silver by ultrasonication starting from silver nitrate and using soluble starch as the reducing agent. Soluble starch has been used during synthesis because it is …

Modified Chitosan for Silver Recovery—Kinetics, Thermodynamic, and Equilibrium Studies Open

Bogdan Pascu, Cristina Ardean, Corneliu Mircea Davidescu, Adina Negrea, Mihaela Ciopec , et al. · 2020

The aim of this study is to investigate the silver recovery from aqueous solutions. There are a variety of recovery methods, such as hydrometallurgical, bio-metallurgical, cementation, reduction, electrocoagulation, electrodialysis, ion ex…

ARSENIC ADSORPTION INTO THE FIXED BED COLUMN FROM DRINKING GROUNDWATER Open

Vasile Mînzatu, Adina Negrea, Corneliu Mircea Davidescu, CORINA SEIMAN DUDA, Mihaela Ciopec , et al. · 2018

One of the main goals of the World Health Organization (WHO) and its Member States is that "all people, regardless of their stage of development and their social-economic condition, have the right to have access to adequate drinking water"…

Tendinţe de valorificare a energiei la nivelul Uniunii Europene Open

Bogdan Pascu, Ovidiu Andrei Cristian Buzoianu · 2017

PASCU, Bogdan, BUZOIANU, Ovidiu. Tendinţe de valorificare a energiei la nivelul Uniunii Europene. In: Competitivitatea si inovarea in economia cunoasterii [online]: conf. st. intern., 22-23 sept., 2017: Culegere de articole. Chisinau: ASEM…

GENERAL CONSIDERATIONS ON INDUSTRIAL PROPERTY RIGHTS AND THE ROLE OF PATENT ADVISOR Open

Gabriel Năstase, Bogdan Pascu, Carmen Georgiana Badea · 2015

Patent advisor must have extensive experience in industrial property activity in order to analyse together with the inventor of all aspects related to the invention, both during drafting documentation and during its review by the Office of…

POTENTIAL PROBLEMS OF GLOBAL SCIENTIFIC RESEARCH, TECHNOLOGICAL DEVELOPMENT AND INNOVATION Open

Gabriel Năstase, Luoana Florentina Pascu, Bogdan Pascu · 2015

In the commercial companies and autonomous administrations there are strong R&D units subordinated thereto, involved in the research activity, especially by free market competition, and not in the last place we need to highlight this creat…

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