Petra Şurlin, Adrian Camen, Ştefan‐Ioan Stratul, Alexandra Roman, Dorin Nicolae Gheorghe, Elena Herăscu, Eugen Osiac, Ion Rogoveanu,
Tópico(s): Protease and Inhibitor Mechanisms
2018 - Elsevier BV | Annals of Anatomy - Anatomischer Anzeiger
Femke Streijger, Kitty So, Neda Manouchehri, Ana Gheorghe, Elena B. Okon, Ryan M. Chan, Benjamin Ng, Katelyn Shortt, Mypinder S. Sekhon, Donald Griesdale, Brian K. Kwon,
Current clinical guidelines recommend elevating the mean arterial blood pressure (MAP) to increase spinal cord perfusion in patients with acute spinal cord injury (SCI). This is typically achieved with vasopressors such as norepinephrine (NE) and phenylephrine (PE). These drugs differ in their pharmacological properties and potentially have different effects on spinal cord blood flow (SCBF), oxygenation (PO2), and downstream metabolism after injury. Using a porcine model of thoracic SCI, we evaluated ...
Tópico(s): Mechanical Circulatory Support Devices
2018 - Mary Ann Liebert, Inc. | Journal of Neurotrauma
Corneliu Ovidiu Vrâncianu, Irina Gheorghe, Elena-Georgiana Dobre, Ilda Czobor Barbu, Roxana Elena Cristian, Marcela Popa, Sang Hee Lee, Carmen Limban, Ilinca Margareta Vlad, Mariana Carmen Chifiriuc,
Since the discovery of penicillin by Alexander Fleming in 1929 as a therapeutic agent against staphylococci, β-lactam antibiotics (BLAs) remained the most successful antibiotic classes against the majority of bacterial strains, reaching a percentage of 65% of all medical prescriptions. Unfortunately, the emergence and diversification of β-lactamases pose indefinite health issues, limiting the clinical effectiveness of all current BLAs. One solution is to develop β-lactamase inhibitors (BLIs) capable ...
Tópico(s): Pneumonia and Respiratory Infections
2020 - Multidisciplinary Digital Publishing Institute | International Journal of Molecular Sciences
Maria-Alexandra Mârțu, Petra Şurlin, Luminița Lazăr, George-Alexandru Maftei, Ionuț Luchian, Dorin Nicolae Gheorghe, Elena Rezuş, Vasilica Toma, Liliana Foia,
(1) Background: The aim of this split-mouth design study was to analyze the clinical periodontal indexes and oxidative stress markers in gingival crevicular fluid modifications after three periodontal disease treatment possibilities (scaling and root planning—SRP; SRP and diode laser—L; SRP and photodynamic therapy—PDT). (2) Methods: The study was conducted on 52 patients: systemically healthy subjects with periodontal disease—non-RA (n = 26); and test group (n = 26) subjects with rheumatoid arthritis and ...
Tópico(s): Rheumatoid Arthritis Research and Therapies
2021 - Multidisciplinary Digital Publishing Institute | Antioxidants
Elena Codruța Gheorghe, Ștefan Udriștoiu, Ștefan Udriștoiu, Andreea Valentina Iacob, Elena Codruța Gheorghe, Gabriel Gruionu, Larisa Săndulescu, Adrian Săftoiu,
In this paper we proposed different architectures of convolutional neural network (CNN) to classify fatty liver disease in images using only pixels and diagnosis labels as input. We trained and validated our models using a dataset of 629 images consisting of 2 types of liver images, normal and liver steatosis.We assessed two pre-trained models of convolutional neural networks, Inception-v3 and VGG-16 using fine-tuning. Both models were pre-trained on ImageNet dataset to extract features from B-mode ...
Tópico(s): Hepatocellular Carcinoma Treatment and Prognosis
2020 - | Medical Ultrasonography
Daniel Oltean‐Dan, Gabriela-Bombonica Dogaru, Maria Tomoaia-Cotişel, Dragoș Apostu, Alexandru Meșter, Horea Benea, Mihai-Gheorghe Paiusan, Elena Jianu, Aurora Mocanu, Reka Balint, Cătălin Popa, Cristian Berce, Gyorgy-Istvan Bodizs, Alina-Mihaela Toader, Gheorghe Tomoaia,
Bone consolidation after severe trauma is the most challenging task in orthopedic surgery. This study aimed to develop biomimetic composite for coating Ti implants. Afterwards, these implants were tested in vivo to assess bone consolidation in the absence or the presence of high-frequency pulsed electromagnetic short-waves (HF-PESW).Biomimetic coating was successfully developed using multi-substituted hydroxyapatite (ms-HAP) functionalized with collagen (ms-HAP/COL), embedded into poly-lactic acid ( ...
Tópico(s): Dental Implant Techniques and Outcomes
2019 - Dove Medical Press | International Journal of Nanomedicine
S. Comorosan, Wilhelm Kappel, Ileana Constantinescu, Marin Gheorghe, Elena Ionescu, Cristian Pîrvu, Sabin Cinca, Ligia Cristache,
This paper reports a new phenomenon connected with the influence of green light (GL) on biological systems. Our experiments have revealed an antioxidant effect of GL on cells subjected to lethal doses of UV at the cellular level and a protective effect of GL on DNA denatured by UV, coupled with a structural modification of DNA macromolecules under GL irradiation, at the molecular level. Mouse melanocyte cultures are subjected to UV irradiations with L50 fluxes of 16.0 J m − 2 s − 1. GL is obtained from ...
Tópico(s): Chemical and Physical Studies
2009 - Springer Science+Business Media | Journal of Biological Physics
Gheorghe Buzdugan, Elena Mihăilescu, M. Radeş,
Nowadays, the engineering practice raises far more vibration problems than can be theoretically explained or modelled. Because Df this, measurements are used in almost all fields of industry, transpor
Tópico(s): Structural Health Monitoring Techniques
1986 - Springer Nature (Netherlands) | Mechanics: dynamical systems
Two series of nylon 6/TiO2 composites were obtained via anionic ring opening polymerization of ϵ-caprolactam in the presence of untreated and surface-treated TiO2 with 3-aminopropyltriethoxysilane (APTEOS) as coupling agent by the rotational molding technique. The polymerization process was carried out using a system initiator/activator based on sodium dicaprolactamato-bis(2-methoxyethoxo)aluminate and N,N′-[methylene-di(4,4′-phenylene)bis-carbamoyl]bis-ϵ-caprolactam. All tests were performed at ...
Tópico(s): Polymer crystallization and properties
2011 - Taylor & Francis | International Journal of Polymer Analysis and Characterization
In situ anionic polymerization of °-caprolactam in the presence of SiO 2 and silanated SiO 2 nanoparticles was promoted as a route for the synthesis of two series of nylon 6/SiO 2 nanocomposites. The process was performed at 160°C well below the melting temperature of the nylon 6 ( T m ~ 225 ° C) and initiated/activated with sodium dicaprolactamato-bis(2-methoxyethoxo)aluminate/ N, N′[methylene-di(4,4′phenylene)bis-carbamoyl]bis- δ-caprolactam system. The nanocomposites obtained exhibit higher onset decomposition ...
Tópico(s): Silicone and Siloxane Chemistry
2006 - SAGE Publishing | High Performance Polymers
Abstract The nylon 6‐based composite materials containing untreated and surface‐treated TiO 2 particles with 3‐aminopropyltriethoxysilane (APTEOS), as coupling agent were prepared by in situ anionic polymerization of ε‐caprolactam in the presence TiO 2 as a filler using the rotational molding technique. The thermal behavior and mechanical properties of the neat nylon 6 and its composites were investigated using various techniques such as differential scanning calorimetry (DSC), thermogravimetric analysis ( ...
Tópico(s): Silicone and Siloxane Chemistry
2012 - Wiley | Polymer Composites
Ines Grigorescu, Bianca Mitrică, Gheorghe Kucsicsa, Elena-Ana Popovici, Monica Dumitrașcu, Roxana Cuculici,
The landscape pattern of the Romanian urban system has experienced significant transformations as a result of the rapid and irreversible changes undertaken after the fall of the communism. In Romania almost 34% of its total population are living in metropolitan areas. The paper is aiming to analyse the landscape-related challenges land-use/land- cover changes in the Romanian metropolitan areas in relation with the main factors involved in the patterns of change: demographic, political and natural. ...
Tópico(s): Remote Sensing and Land Use
2012 - University of Bucharest | HUMAN GEOGRAPHIES – Journal of Studies and Research in Human Geography
The anionic nylon 612 copolymers consisting of ϵ-caprolactam and 0.0–50.0 wt.% of laurolactam comonomer were synthesized and some of their characteristics were compared. The melting temperature, degree of crystallinity (first and second heating scan) and crystallization temperature of the nylon 612 copolymers are influenced by the presence of comonomer (laurolactam) decreasing proportionally to the amount of the laurolactam in the initial monomer mixture. The thermal stability of the copolyamides ...
Tópico(s): Synthesis and properties of polymers
2010 - Elsevier BV | Materials & Design (1980-2015)
This study deals with the experimentally investigated effect of zinc (Zn) particles on the thermal and mechanical properties of nylon 6/zinc composite materials. Nylon 6 and nylon 6 containing 6.0, 8.0, 12.0, 15.0, 20.0, and 25.0 wt.% of unmodified zinc particles, metal-polymer composite materials, were prepared by in situ anionic polymerization of є-caprolactam (CL) in the presence of metallic fillers using rotational molding technique. The characteristics, namely melting temperature, degree of crystallinity ( ...
Tópico(s): biodegradable polymer synthesis and properties
2010 - Taylor & Francis | International Journal of Polymer Analysis and Characterization
Ioana Diaconu, R. Gîrdea, Camelia Cristea, Gheorghe Nechifor, Elena Ruse, Eugenia Eftimie Totu,
In this work, the data obtained using bulk liquid membranes for removing mono and disubstituted phenolic nitro derivatives (p-nitrophenol, m-nitrophenol, 2,4-dinitrophenol) from a source of waste water are presented. Based on the speciation diagrams of the phenolic compounds the optimum operation parameters (as pH values) of feeding and receiving phases for the transport efficiencies were established. When the waste water source (feeding source) had an acidic pH, the efficiency to transfer the studied ...
Tópico(s): Membrane-based Ion Separation Techniques
2010 - University of Bucharest | ROMANIAN BIOTECHNOLOGICAL LETTERS
Ioana Diaconu, Hassan Y. Aboul‐Enein, Mohamed A. Al‐Omar, Gheorghe Nechifor, Elena Ruse, Andrei A. Bunaciu, Eugenia Eftimie Totu,
The paper presents experimental data obtained in the study of liquid–liquid partition equilibriums in biphasic system in order to optimize the process of transport through bulk liquid membranes (triphasic partition systems). The partition equilibriums of some nitrophenols using chloroform as extraction solvent and membranary solvent, respectively, were studied. The influence of the pH on the partition equilibriums was investigated. The repartition constants and the pKa values of the studied nitrophenols ...
Tópico(s): Analytical Chemistry and Chromatography
2010 - Elsevier BV | Arabian Journal of Chemistry
The paper present the synthesis of a series of nylons as constituent polymers of parts obtained by rotational molding via activated anionic copolymerization of caprolactam with laurolactam. The initial mold temperature (initial polymerization temperature) was kept constant at 160° for all experiments. The initial laurolactamn content influence was investigated in terms of nylon yield, viscosity, density, melting temperature, degree of crystallinity, water absorption, impact strength and flexural ...
Tópico(s): Polymer Nanocomposites and Properties
2004 - SAGE Publishing | High Performance Polymers
Gheorghe Brabie, Elena Costache, N. Nanu, Bogdan Chiriță,
An important problem encountered in the deep drawing processes of sheet metals is represented by the sheet thickness variation that can influence and affect the quality of drawn parts, may cause stress concentration in different zones of drawn parts or may conduct part fracture. The variation of sheet thickness during cold formation can have a greater importance when the drawn parts are made with small dimensions from metal sheets having small thickness. The present paper analyses experimental and ...
Tópico(s): Advanced Surface Polishing Techniques
2013 - Elsevier BV | International Journal of Mechanical Sciences
Gheorghe Lăzăroiu, Elena Pop, Gabriel Negreanu, Ionel Pîșă, Lucian Mihăescu, Andreya Bondrea, Viorel Berbece,
This paper introduces a viable and economical solution for reducing the impact of fossil fuels combustion on the environment. The new proposed energy vector solid biomass-hydrogen combines the positive effect of biomass on the carbon emissions and the ones of hydrogen clean gas. The researches regarding hydrogen diffusion (pure or mixed) within biomass are part of a wider research conducted by the authors on utilization of hydrogen as active environment for combustion of solid biomass. The researches ...
Tópico(s): Energy and Environment Impacts
2017 - Elsevier BV | Energy
Gheorghe Kucsicsa, Elena-Ana Popovici, Dan Bălteanu, Ines Grigorescu, Monica Dumitrașcu, Bianca Mitrică,
Tópico(s): Soil and Land Suitability Analysis
2018 - Springer Science+Business Media | Landscape and Ecological Engineering
Ines Grigorescu, Gheorghe Kucsicsa, Elena-Ana Popovici, Bianca Mitrică, Irena Mocanu, Monica Dumitrașcu,
The current paper aims at assessing future urban sprawl in Romania based on predicted land use/cover change (2007–2050) simulated using CLUE-S model (the Conversion of Land Use and its Effects at Small regional extent) and CORINE Land Cover (CLC) database. Given the regional particularities of land use/cover change, the CLUE-S model was applied for each Development Region of Romania (NUTS 2 level). The authors analysed various biophysical and socio-economic explanatory variables associated with the ...
Tópico(s): Soil and Land Suitability Analysis
2019 - Taylor & Francis | Geocarto International
Gheorghe Kucsicsa, Elena-Ana Popovici, Dan Bălteanu, Monica Dumitrașcu, Ines Grigorescu, Bianca Mitrică,
Tópico(s): Forest Management and Policy
2019 - Springer Science+Business Media | Environmental Modeling & Assessment
Georgeta Ciurescu, Mihaela Dumitru, Anca Gheorghe, Arabela Elena Untea, R. Drăghici,
The objective of this study was to investigate the impacts of Bacillus subtilis (BS), ATCC 6051a strain, as a probiotic bacterium in broiler diets based of 2 protein sources (soybean meal [SBM] and cowpea seeds [CWP]), on growth performance (GP), carcass traits, bone mineralization, and microflora population (0 to 42 d age). The SBM and CWP starter, grower, and finisher diets were tested in the presence or absence of BS (5.0 × 1011 CFU spores g−1 feed) in a 2 × 2 factorial arrangement of treatments in a completely ...
Tópico(s): Agricultural pest management studies
2020 - Elsevier BV | Poultry Science
Carmen Daniela Petcu, Oana Diana Mihai, Dana Tăpăloagă, Raluca Aniela Gheorghe-Irimia, Elena Pogurschi, M. Militaru, C. Borda, Oana-Mărgărita Ghimpețeanu,
The perceived level of risk associated with a food product can influence purchase and consumption decisions. Thus, current trends in food safety address an issue of general interest—the identification of healthy and economical alternatives to synthetic antioxidants that may have harmful effects on human health. Still, the processors’ target is to increase the shelf life of food products using preserving substances. Natural antioxidants can be extracted and used in the food industry from different ...
Tópico(s): Biochemical Analysis and Sensing Techniques
2023 - Multidisciplinary Digital Publishing Institute | Foods
Cristina Gluhovschi, Gheorghe Gluhovschi, Elena Potencz, Elena Lazăr, Ligia Petrică, Gheorghe Bozdog, Florica Gădălean, Flaviu Bob, Daniel Cioca, Silvia Velciov,
The HLA-DR antigen is a HLA class II molecule involved in the presentation of antigenic peptides to the T cell receptor, thus regulating the immune response. Renal expression of the HLA-DR antigen may indicate specific sites of immunologically-mediated kidney injury in glomerulonephritis (GN). The aim of our study was to assess the presence of the HLA-DR antigen along the nephron including the extraglomerular mesangium in GN.A cross-sectional study of 22 patients with glomerulonephritis, mean age: ...
Tópico(s): Systemic Lupus Erythematosus Research
2012 - Elsevier BV | Human Immunology
Cristina Gluhovschi, Gheorghe Gluhovschi, Elena Potencz, Diana Herman, Ligia Petrică, Silvia Velciov, Gheorghe Bozdog, Flaviu Bob, Corina Vernic, Daniel Cioca,
Tópico(s): Proteoglycans and glycosaminoglycans research
2008 - Springer Science+Business Media | Virchows Archiv
Viorica Gladchi, Nelli Goreaceva, Gheorghe Duca, Elena Bunduchi, Lidia Romanciuc, Mardari Igor, Ruslan Borodaev,
The work presented in the paper discusses the contribution of the Novodnestrovsc water system to the formation of redox conditions in the lower Dniester. The conclusions were drawn on the basis of a long-term protocol of analyses that included the analysis of the oxygen regime, evaluation of the content of hydrogen peroxide, rH2, biological oxygen demand as well as other additional parameters.
Tópico(s): Chemical Synthesis and Characterization
2008 - Institute of Chemistry of ASM | Chemistry Journal of Moldova
Tópico(s): Polymer crystallization and properties
2013 - Springer Science+Business Media | Journal of Polymer Research
Gheorghe‐Doru Roiban, Elena Serrano, T. Soler, Ion Grosu, Carlos Cativiela, Esteban P. Urriolabeitia,
A [2 + 2] photocycloaddition has been observed in regioselectively orthopalladated 2-aryl-4-arylidene-5(4H)-oxazolones, leading to unprecedented cyclobutane-bis(oxazolones).
Tópico(s): Synthesis and Reactions of Organic Compounds
2009 - Royal Society of Chemistry | Chemical Communications
Gheorghe‐Doru Roiban, Elena Serrano, T. Soler, Gabriel Aullón, Ion Grosu, Carlos Cativiela, Manuel Martı́nez, Esteban P. Urriolabeitia,
Orthopalladated complexes derived from (Z)-2-aryl-4-arylidene-5(4H)-oxazolones have been prepared by reaction of the oxazolone with palladium acetate in acidic medium. The reaction is regioselective, only the ortho C-H bond of the arylidene ring being activated, producing a six-membered ring. The scope and reaction conditions of the orthopalladation are dependent on the acidity of the solvent. In CF(3)CO(2)H a large number of oxazolones can be metalated under mild conditions. As acidity decreases ...
Tópico(s): Synthesis and Biological Evaluation
2011 - American Chemical Society | Inorganic Chemistry