BrainMap

Mrs. Mihaela Streza

CS II

cercetator CS II - INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Researcher

Curriculum Vitae (13/06/2019)

Expertise & keywords

Development of active thermal-wave methodologies for non-destructive evaluation and thermophotonic imaging of teeth Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-1507 2015 - 2017

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/PNCDI/ru136/index.htm

Abstract:

The main objective of the project is to improve the performance in dental diagnosis and to show that using different types of modulation sources (lasers, LEDs), modulation schemes, and complex image processing algorithms, one can construct high resolution images of defective zones of teeth.

The main investigation technique will be infrared lock-in thermography, which is a non-contact and non-invasive tool.

In order to evaluate the adaptation between restorative materials and tooth, an automatic defect detection methodology will be implemented.The method will allow the assessment of both marginal and internal microgaps located at the interface between tooth and filling. The progression of demineralization of enamel with time, for specimens undergoing different treatment demineralization periods, will also be analyzed. 2D maps of the demineralized zones of dental tissue and of the interfaces will be obtained, highlighting the areas with defects .

The method will be validated by complementary techniques: SEM and X-ray diffraction.

The improvement of the manufacturing technology of lead-acid batteries to be used for start-and-stop automobiles Call name: Joint Applied Research Projects - PCCA 2013 - call
PN-II-PT-PCCA-2013-4-1226 2014 - 2017

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); UNIVERSITATEA BABES BOLYAI (RO); ROMBAT S.A. (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/PNCDI/rombss/

Abstract:

We propose a methodology for the improvement of fabrication technology for the positive electrodes used as components in the lead-acid batteries produced at sc rombat sa . The final goal of our consortium is to improve the current technology used by industrial partner for fabrication of the batteries to be used for start-and-stop automobiles (i.e . To satisfy the j240 – sae and en 50342-6 quality tests) . The proposed approach is designed for the optimization of the scientific and technological steps involved in the fabrication of positive electrodes . It integrates the fundamental knowledge obtained from ab initio calculations, synthesis of new chemical compounds, fabrication of new alloys and structural characterization of the materials used to fabricate the electrode, at both nanoscopic and mesoscopic scale . The key element for the integration of all these activities is the fabrication and characterization of functional prototypes by the industrial partner.

The main problem to be solved is to control the corrosion of the positive electrode during the charge-discharge cycles, imposed by the requests of the start-and-stop technology . The solutions proposed by our consortium are: (i) fabrication of new alloys to be used for the production of the metallic grid that support for the active mass of the electrode (ii) improving the fabrication technology of the metallic grid (iii) improving the electrochemical properties of the active mass by new fabrication technology and by the use of new additives to the active mass. We note here that for the negative electrode as well as for the electrolyte the standard products fabricated by sc rombat sa will be used . The project’s goal will be achieved by using a feed-back loop: the design of materials and the fabrication steps involved by each prototype will be refined by successive fabrication of the prototypes that will gradually incorporate the information produced by each partner . At each step of our methodology the full characterization of the electrochemical and structural properties of the materials and prototypes already fabricated will be used as starting point for further refinement of the fabrication technology . A continuous exchange of data between the research Institutes and the industrial partner is foreseen for the whole duration of the project . This will allow us to tune the results obtained in the laboratory with those produced in industrial conditions . At project’s term we will discuss the technological steps needed for the implementation of the results by using the infrastructure available at sc rombat sa.

Novel advanced smart biomaterials of giomer type with applications in dentistry Call name: Joint Applied Research Projects - PCCA-2011 call, Type 2
PN-II-PT-PCCA-2011-3.2-1419 2012 - 2016

Role in this project:

Coordinating institution: UNIVERSITATEA BABES BOLYAI

Project partners: UNIVERSITATEA BABES BOLYAI (RO); INSTITUTUL DE CHIMIE MACROMOLECULARA "PETRU PONI" (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); UNIVERSITATEA DE MEDICINA SI FARMACIE (U.M.F) Cluj-Napoca (RO); REMED PRODIMPEX SRL (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://granturi.ubbcluj.ro/giodent

Abstract:

The present research project proposed the elaboration, achievement and experimentation of novel, advanced, smart biomaterial formulations belonging to the giomers class with low polymerization shrinkage, continuous release of fluoride in time, improved adhesion to tooth tissues, high mechanical properties and good biocompatibility to be used in different applications in dentistry.

Given the ample and varied activities to be undertaken, the project requires a consortium to be constituted from five partners, two Universities, one National Research Institute, one Institute of the Romanian Academy and one commercial entity, forming an interdisciplinary team of specialists with experience in chemistry, engineering, physics, materials science, biology and medicine .

The planed results of the research activities are the following: 3 products of giomer type for the restoration of the anterior and posterior teeth, for the prophylaxis of caries with children and as liner/base material; 1 dentin adhesive with improved adhesion to tooth structure, 4 laboratory technologies, 3 Feasibility studies, 3 marketing studies, 4 technical specifications, 6 ISI articles and 2 registered patents.

By achieving the proposed project, contribution is brought to the sustaining of the national policy in the field, by creating the transfer and capitalization opportunities which will lead to the development of a Romanian industry of performing dental products, at

European standards level, having in view the specialized human potential with experience in the field.

High Accuracy Photopyroelectric Calorimetry for Magnetic Nanofluids Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0036 2011 - 2016

Role in this project:

Coordinating institution: Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare

Project partners: Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare (RO)

Affiliation:

Project website: http://www.itim-cj.ro/PNCDI/idei7/

Abstract:

The main purpose of this project is the use of a high accuracy photopyroelectric (PPE) calorimetry to study thermal properties of magnetic nanofluids and their changes as a function of the relevant parameters of the nanofluid (carrier liquid, surfactant, type, size and concentration of nanoparticles). The research is focused on the water-based nanofluids with Fe3O4, gamma-Fe2O3 and CoFe2O4 type of nanoparticles, covered with polymer as stabilizer. Through the PPE calorimetry one can obtain with high accuracy all static and dynamic thermal parameters (by directly measuring two, the fundamental ones: thermal diffusivity and effusivity) of a liquid sample. The main originality of this project consists in the fact that, due to the increase of the sensitivity of the PPE investigations, it is possible to study, through calorimetric techniques, intimate structural processes, associated with small variations of the thermal parameters, as it is specific to magnetic nanofluids too. Water-based magnetic nanofluids are currently investigated in order to develop new magnetically controlled drug delivery systems and magnetic separation methods of biomaterials. The project is organized in two main stages: (i) the increase of the performances of the PPE calorimetry (through theoretical and experimental optimizations) up to an accuracy and reproducibility of 96% and (ii) the study of the thermal properties of the magnetic nanofluids as a function of the relevant parameters of the nanofluid.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects