A5066604292- Catalysis and Hydrodesulfurization Studies
- Thermochemical Biomass Conversion Processes
- Biodiesel Production and Applications
- Catalytic Processes in Materials Science
- Catalysis for Biomass Conversion
- Building materials and conservation
- Algal biology and biofuel production
- Cultural Heritage Materials Analysis
- Conservation Techniques and Studies
- Mesoporous Materials and Catalysis
- biodegradable polymer synthesis and properties
- Lignin and Wood Chemistry
- Biofuel production and bioconversion
- Bone Tissue Engineering Materials
- Analytical Chemistry and Chromatography
- Dental materials and restorations
- Zeolite Catalysis and Synthesis
- Industrial Gas Emission Control
- Enzyme Catalysis and Immobilization
- Asphalt Pavement Performance Evaluation
- Membrane Separation Technologies
- Petroleum Processing and Analysis
- Catalysts for Methane Reforming
- Polymer Science and PVC
- Phosphorus and nutrient management
Institutul Naţional de Cercetare Dezvoltare pentru Chimie si Petrochimie
2016-2025
National Institute for Research and Development in Informatics - ICI Bucharest
2019-2025
National Institute for Research and Development in Environmental Protection
2015-2023
Institute for Research and Development
2020
In this study, multi-walled carbon nanotubes (MWCNTs) were decorated with different types of nanoparticles (NPs) in order to obtain hybrid materials improved antimicrobial activity. Structural and morphological analysis, such as Fourier transformed infrared spectroscopy, Raman X-ray diffraction, transmission electron microscopy, environmental scanning microscopy/energy-dispersive spectroscopy the Brunauer–Emmett–Teller technique used investigate decoration NPs. Analysis showed a narrow size...
Two types of mesoporous materials, MCM-41 and MCM-48, were functionalized by the soft-template method using (3-aminopropyl)triethoxysilane (APTES) as a modifying agent. The obtained silica materials loaded with trans-ferulic acid (FA). In order to establish morphology structure series specific techniques used such as: X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmet-Teller (BET), Fourier Transform Infrared Spectroscopy (FTIR) thermogravimetric analysis (TGA). We...
Melissa officinalis is an important medicinal plant that used and studied intensively due to its numerous pharmacological effects. This has active compounds with biomedical potential; some are volatile, while others sensitive heat or oxygen. Therefore, increase stability prolong biological activities, the natural extract can be loaded into various nanostructured systems. In this study, different loading systems were obtained from mesoporous silica, like Mobile Composition of Matter family...
Carbonated hydroxyapatite derivatives (CHAp) and its metallic (Ag, Sr, Ba, K, Zn) have been prepared characterized in this paper their coating capacity on some model stone samples evaluated discussed. These compounds were by using several analytical tools, including X-ray diffraction analysis (XRD), thermogravimetric (TGA), Fourier transform infrared spectroscopy (FTIR), to determine the purity of CHAp sample. The XRD FTIR results confirmed presence AB-carbonated type CHAp. thermal (TGA)...
Abstract Bio-oil produced from biomass pyrolysis has the potential to become an alternative renewable fuel. However due high content of oxygenated compounds is unsuitable as transportation The objective this work evaluate catalytic activity CoMo /γ-Al 2 O 3 -HMS in hydrotreating process bio-oil. prepared catalyst was characterized by different techniques (X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron...
This paper describes the synthesis and evaluation of samarium-doped 45S5 bioactive glass in various ratios. The samples were prepared using sol–gel method subjected to a heat treatment at 700 °C normal atmosphere. obtained analyzed by thermogravimetric analysis (TGA) before after assess their thermal stability compositional changes. bioactivity was tested vitro immersion simulated body fluid (SBF) 36.5 ± 0.5 (normal human temperature) pH 7.4 (the blood plasma), for several time periods....
1-butanethiol, a volatile mercaptan that is harmful and has persistent odor, was adsorbed from gaseous stream onto granulated activated carbon (AC) doped with Cu, Fe, Zn oxides. The adsorbents were prepared by precipitating salts of the respective metals using an ammonia solution, along inclusion anti-caking agent known as Pluronic-123. Characterization three conducted electron microscopy (SEM), textural analysis, thermogravimetric FTIR, XRD. study's results indicate exhibit different...
The experiments in this study investigated the toxicity of naphthenic acids (NAs) on algal culture Spirulina platensis. tests monitored progression suspension media contaminated with various concentrations acids. evolution during metabolism NAs was investigated. monitoring also included determination values some parameters biodegradation process (pH, conductivity, cell viability, dissolved oxygen). Optical density measurements (OD600) were used to quantify growth platensis, alongside...
This paper reports the first evidence of presence mineral tremolite asbestos in Roman building materials from Micia archaeological site (Romania), thus contributing to understanding implications ancient materials. The includes both a fort and civilian military settlement that was inhabited by civilians soldiers various troops. Over time, since late 2nd century AD, has undergone significant reconstruction, especially after some fires. Tremolite is non-flammable that, due its fibrous...
This study examines a catalyst based on graphitic carbon nitride (g-C3N4) for synthesizing glycerol carbonate through the coupling reaction of and CO2. In this research, we focus simultaneously improving CO2 emission reduction valorization by co-doping g-C3N4 with phosphorus (P), sulfur (S), magnesium (Mg), lithium (Li) better catalytic performance. The catalysts were prepared one-step thermal condensation process characterized using XRD, SEM, TGA, FTIR, nitrogen adsorption–desorption...
This study investigates the synthesis of biodiesel from three vegetable oils with significantly different chemical compositions. Based on properties these samples, a method was proposed to estimate density petrodiesel–biodiesel blends using an artificial neural network (ANN). The ANN employed in this research consisted 10 neurons. experimental data showed high correlation, indicating effective training and precise estimations relation provided data. accuracy evaluated by comparing blending...
The irradiation of polymeric materials with ionizing radiation (γ-rays, X-rays, accelerated electrons, ion beams, etc.) may lead to disproportion, hydrogen abstraction, arrangements, degradation, and/or the formation new bonds. purpose this paper is evaluate effect gamma on some poly(lactic acid) (PLA)-based blends and biocomposites, which crucial when they are used for food packaging or medical purposes. biocomposites based PLA rosemary ethanolic extract (R) poly(ethylene glycol) (PEG) (20...
The degree of intercalation the polyvinyl alcohol‐starch blend with layered silicate is increased if silicates untreated or intercalated ammonium ions that contain small radicals. If like NaMMT used, it possible to obtain exfoliated‐intercalated nanocomposites. materials based on PVOH, starch, and Nanocor I 28, 33, Cloisite 15 A can be PVOH starch reinforced 93 A, microcomposites result. study will continue analysis new morphologies considering transmission electron microscopy (TEM).
(1) Background: Due to the precarious situation of many monuments or archeological sites, analytical investigations are necessary obtain information about used materials, as well identify most appropriate solutions for their conservation/restoration. This paper addresses characterization mural painting fragments collected during excavation in 2018 Rapoltu Mare (La vie), Deva. (2) Methods: Specific techniques were used, follows: X-ray diffractometry (XRD), wavelength dispersive fluorescence...
This paper has approached the study of dairy wastewater treatment and simultaneous biocompound production by Porphyridium purpureum under continuous light a day–night cycle. The main goals were to achieve reduction in lactose content cheese that was tested and, at same time, obtain added value from produced compounds, so as increase economic process. results show biomass increases proportionally with concentration for both illumination options. waste stream reduced over 90% just 7 days....
In recent years, algae have emerged as a promising feedstock for biofuel production, due to their eco-friendly, sustainable, and renewable nature. Various methods, including chemical, biochemical, thermochemical processes, are used convert algal biomass into biofuels. Pyrolysis, widely recognized technique, involves high temperature pressure generate biochar bio-oil from diverse sources. pyrolytic processes transform bio-oil, low pyrolysis, fast catalytic microwave-assisted hydropyrolysis....
Since its first use as a drug delivery system, mesoporous silica has proven to be surprisingly efficient vehicle due porous structure. Unfortunately, most synthesis methods are based on using large amounts of surfactants, which then removed by solvent extraction or heat treatment, leading an undesired environmental impact because the generated by-products. Hence, in present study, we followed material with wormhole-like pore arrangement, two FDA-approved substances templates, namely Tween-20...
The published kinetic models for methanol etherification over ZSM-5 zeolite were evaluated against our own experimental data. process was investigated a synthesized H-ZSM-5 using laboratory fixed-bed reactor. experiments carried out at atmospheric pressure, temperatures of 170–270 °C, feed concentrations up to 15 mol %, and gas phase velocity (WHSV) values in the range 15–48 h–1. results showed decrease conversion with respect concentration, single reaction product obtained significant being...