47 Result(s)

Article

Structural investigations of V₂O₅–P₂O₅–CaO glass system by FT-IR and EPR spectroscopies

xV₂O₅·(100 − x)[0.7P₂O₅·0.3CaO] glass system was obtained for 0 ≤ x ≤ 35 mol% V₂O₅. In order to obtain information regarding their structure, several techniques such as X-Ray diffraction, FT-IR, ...

R. Stefan, D. Simedru, A. Popa, I. Ardelean in Journal of Materials Science (2012)

Article

Structural study of xK₂O·(100 − x)[P₂O₅·CaO] glass system

The P₂O₅–CaO glasses with incorporation of K₂O were investigated using X-ray powder diffraction, infrared absorption, and Raman scattering. These measurements give information about potassium–calcium phosphate gl...

Adriana N. Regos, R. Ciceo Lucacel, I. Ardelean in Journal of Materials Science (2011)

Chapter and Conference Paper

Low-Field Nuclear Magnetic Resonance Relaxometry – A Tool in Monitoring the Melting Transition of Polymeric Capsules with Applications in Drug Delivery

Polymeric micro and nanocapsules are often used as drug delivery systems. Their main advantage is that the active substances can be placed inside the capsule and released at the position of the diseased tissue...

R. E. Nechifor, I. Ardelean in International Conference on Advancements o… (2011)

Article

Low-Field Nuclear Magnetic Resonance Relaxometry as a Tool in Monitoring the Aging of Coating Solutions (Case Study: Barium Propionate Precursor Coating Solution)

In the present study, we investigate the relationship between the aging of a barium coating solution used in the synthesis of the precursors for YBa₂Cu₃O_7−x -coated conductors or any oxide...

C. Badea, R. B. Mos, L. Ciontea, I. Ardelean in Applied Magnetic Resonance (2010)

Article

Structural investigation of xFe₂O₃ · (100 − x)[P₂O₅ · TeO₂] glass system by FT-IR study and EPR spectroscopy

Glasses from xFe₂O₃ · (100 − x)[P₂O₅ · TeO₂] system, with 0 ≤ x ≤ 50 mol%, were investigated by X-ray diffraction, FT-IR and EPR spectroscopies. The XRD patterns show a vitreous state of studied samples for x ≤ 3...

C. Horea, D. Rusu, I. Ardelean in Journal of Materials Science: Materials in Electronics (2009)

Chapter and Conference Paper

Mathematical Model for Two Degree of Freedom Motion

The paper presents the conceive of control function for mechanisms following a planar contour of an object. The manipulator moves along the contour of the object is considered a problem of kee** a manipulato...

I. Ardelean in SYROM 2009 (2009)

Article

Structural investigation of xAg₂O · (100 − x)[2B₂O₃ · As₂O₃] glass system

Structural analysis of xAg₂O · (100 − x)[2B₂O₃ · As₂O₃] glass system, with 0 ≤ x ≤ 10 mol%, was performed by means of FT-IR and Raman spectroscopies. The purpose of this work is to investigate the structural chan...

I. Ardelean, S. C. Baidoc in Journal of Materials Science (2008)

Article

Time-Dependent Diffusion Studies on Miglyol Molecules Confined in Permeable Polymeric Capsules

Time-dependent diffusion studies have been done on miglyol molecules confined in ε-caprolactone polymeric capsules prepared by an emulsification–diffusion technique. The nuclear magnetic resonance diffusometry...

M. Bogdan, A. Parnau, C. Badea, I. Ardelean in Applied Magnetic Resonance (2008)

Article

Preparation and NMR Characterization of Polyethyl-2-cyanoacrylate Nanocapsules

The aim of this work was to prepare a nanocapsule by interfacial polymerization of ethyl-2-cyanoacrylate monomer in an oil-in-water emulsion. The chemical nature of the individual system components and the nan...

M. Bogdan, A. Nan, C. V. L. Pop, L. Barbu-Tudoran… in Applied Magnetic Resonance (2008)

Article

Time-Dependent Molecular Diffusion in Partially Filled Porous Glasses with Heterogeneous Structure

Nuclear magnetic resonance (NMR) microscopy of silica glasses with micrometer pores (Vitrapor#5) partially filled with water or cyclohexane reveals a heterogeneous distribution of liquid on a length scale much...

G. Farrher, I. Ardelean, R. Kimmich in Applied Magnetic Resonance (2008)

Article

EPR study of V₂O₅–P₂O₅–Li₂O glass system

\({x\hbox{V}_{2}\hbox{O}_{5}\cdot(100-\hbox{x})[\hbox{P}_{2}\hbox{O}_{5}\cdot\hbox{Li}_{2} \hbox{O}]}\) ...

I. Ardelean, O. Cozar, N. Vedeanu… in Journal of Materials Science: Materials in… (2007)

Article

Structural changes induced by Fe₂O₃ addition in strontium-borate glass matrix

Glasses of the xFe₂O₃·(100−x)[B₂O₃·SrO] system, with 0 ≤ x ≤ 30 mol% were studied by X-ray diffraction, density, optical microscopy and FT-IR spectroscopy measurements. The X-ray patterns for the prepared system ...

I. Ardelean, R. Lungu, P. Păşcuţă in Journal of Materials Science: Materials in Electronics (2007)

Article

Structural and magnetic properties of strontium–borate glasses containing iron ions

Glasses of the xFe₂O₃·(100 − x)[B₂O₃·SrO] system, with 0 ≤ x ≤ 30 mol%, were studied by EPR and magnetic susceptibility measurements. EPR spectroscopy and magnetic susceptibility measurements show that the Fe³⁺ i...

I. Ardelean, R. Lungu, P. Păşcuţă in Journal of Materials Science (2007)

Chapter

Fluid Diffusion in Partially Filled Nanoscopic and Microscopic Porous Materials

The contribution of the vapor phase to molecular diffusion in porous silica glasses with nanometer (Vycor) and micrometer (VitraPor #5) pores partially filled with water (polar) or cyclohexane (nonpolar) was i...

I. Ardelean, G. Farrher, C. Mattea, R. Kimmich in Modern Magnetic Resonance (2006)

Article

Grating spin echoes

Single-quantum proton spin coherences produced by a single radio-frequency pulse and evolving in a spatially modulated, external magnetic field were examined theoretically and experimentally in water. It is sh...

I. Ardelean, B. Buhai, R. Kimmich in Applied Magnetic Resonance (2004)

Article

EPR and magnetic investigations of MnO-B₂O₃-PbO glasses

Electron paramagnetic resonance (EPR) of Mn²⁺ ions revealed their distribution on different structural units of a 2B₂O₃PbO glass matrix doped with MnO. Octahedral symmetric sites, tetragonally distorted, were det...

I. Ardelean, M. Flora in Journal of Materials Science: Materials in Electronics (2002)

Article

Structural and magnetic investigations of the xCuO(100-x)[70TeO2·25B2O3·5SrF2] glasses

The xCuO(100-x)[70TeO₂·25B₂O₃·5SrF₂] vitreous system was studied in the 0.3≤x≤20 mol %CuO concentration range, by means of electron paramagnetic resonance (EPR) and magnetic susceptibility measurements. At low co...

I. Ardelean, M. Peteanu, V. Simon, F. Ciorcas, V. Ioncu in Applied Physics A (2001)

Article

Structural investigation of Fe2O3-TeO2-B2O3-SrO glasses by EPR

I. Ardelean, M. Peteanu, V. Simon, F. Ciorcas… in Journal of Materials Science Letters (2001)

Article

Structural and magnetic studies of CuO-TeO ₂ and CuO-TeO ₂ -B ₂ O ₃ glasses

The glass systems xCuO ^. (1- x)TeO₂ and xCuO ^. (1- x)[75TeO₂ ^{. ...}

F. Ciorcas, S.K. Mendiratta, I. Ardelean… in The European Physical Journal B - Condense… (2001)

Article

EPR and magnetic susceptibility studies on V₂ O₅-P₂O₅-PbO glasses

EPR and magnetic susceptibility investigations on the $$x{\text{V}}_{\text{2}} {\text{O}}_{\text{5}} \cdot {\text{(100}} - {\text{x)[...

I. Ardelean, O. Cozar, Gh. Ilonca, V. Simon… in Journal of Materials Science: Materials in… (2000)