LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 10

Search options

  1. Article ; Online: UNSATURATED POLYESTER RESIN BASED COMPOSITES: A CASE STUDY OF LIGNIN VALORISATION.

    Salah Adeen Embirsh, Hifa / Vuksanović, Marija M / Mladenović, Ivana O / Knežević, Nataša / Milošević, Milena / Mijatov, Slavko / Jančić Heinemann, Radmila / Marinković, Aleksandar

    Chemosphere

    2024  , Page(s) 142144

    Abstract: Materials from green resources boast a low carbon footprint, forming the foundation of the circular economy approach in materials science. Thus, in this study, waste poly(ethylene terephthalate) (PET) was subjected to depolymerization using propylene ... ...

    Abstract Materials from green resources boast a low carbon footprint, forming the foundation of the circular economy approach in materials science. Thus, in this study, waste poly(ethylene terephthalate) (PET) was subjected to depolymerization using propylene glycol (PG), and subsequent polycondensation with bio-based maleic anhydride (MA) produced unsaturated polyester resin (b-UPR). Bio-derived acryloyl-modified Kraft lignin (K
    Language English
    Publishing date 2024-04-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2024.142144
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 2540: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  2. Article ; Online: Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite.

    Janićijević, Aleksandra / Filipović, Suzana / Sknepnek, Aleksandra / Salević-Jelić, Ana / Jančić-Heinemann, Radmila / Petrović, Miloš / Petronijević, Ivan / Stamenović, Marina / Živković, Predrag / Potkonjak, Nebojša / Pavlović, Vladimir B

    Polymers

    2024  Volume 16, Issue 8

    Abstract: This study presents an analysis of films which consist of two layers; one layer is PVDF as the matrix, along with fillers ... ...

    Abstract This study presents an analysis of films which consist of two layers; one layer is PVDF as the matrix, along with fillers BaTiO
    Language English
    Publishing date 2024-04-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym16081033
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  3. Article ; Online: Tailored Adhesion Properties of Acrylate Adhesives on Al Alloys by the Addition of Mn-Al-LDH.

    Tomić, Natasa Z / Saleh, Mohamed Nasr / Vuksanović, Marija M / Egelja, Adela / Obradović, Vera / Marinković, Aleksandar / Jančić Heinemann, Radmila

    Polymers

    2021  Volume 13, Issue 9

    Abstract: The goal of this study was to investigate the effect of the structure of Mn-Al layered double hydroxide (LDH) on the adhesion behavior of composite adhesives on two Al alloys (L3005 and L8079). The composite adhesives were made out of the UV-curing ... ...

    Abstract The goal of this study was to investigate the effect of the structure of Mn-Al layered double hydroxide (LDH) on the adhesion behavior of composite adhesives on two Al alloys (L3005 and L8079). The composite adhesives were made out of the UV-curing Bisphenol A glycidylmethacrylate/triethylene glycol dimethacrylate (BT) as polymer matrix and the addition of 1, 3, and 5 wt. % of Mn-Al LDH as adhesion enhancers. Adhesion was evaluated by using the micro Vickers hardness testing procedure. The wetting angle of composite adhesives to the Al substrates was measured and compared to the adhesion parameter
    Language English
    Publishing date 2021-05-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym13091525
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  4. Article ; Online: Mechanical properties correlation to processing parameters for advanced alumina based refractories

    Dimitrijević Marija M. / Veljović Djordje / Posarac-Marković Milica / Jančić-Heinemann Radmila / Volkov-Husović Tatjana / Zrilić Milorad

    Science of Sintering, Vol 44, Iss 1, Pp 25-

    2012  Volume 33

    Abstract: Alumina based refractories are usually used in metallurgical furnaces and their thermal shock resistance is of great importance. In order to improve thermal shock resistance and mechanical properties of alumina based refractories short ceramic fibers ... ...

    Abstract Alumina based refractories are usually used in metallurgical furnaces and their thermal shock resistance is of great importance. In order to improve thermal shock resistance and mechanical properties of alumina based refractories short ceramic fibers were added to the material. SEM technique was used to compare the microstructure of specimens and the observed images gave the porosity and morphological characteristics of pores in the specimens. Standard compression test was used to determine the modulus of elasticity and compression strength. Results obtained from thermal shock testing and mechanical properties measurements were used to establish regression models that correlated specimen properties to process parameters.
    Keywords ceramics composites ; image analysis ; mechanical properties ; electron microscopy ; Chemistry ; QD1-999 ; Science ; Q ; DOAJ:Chemistry (General) ; DOAJ:Chemistry
    Language English
    Publishing date 2012-01-01T00:00:00Z
    Publisher International Institute for the Science of Sintering, Beograd
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Non-destructive characterisation and classification of ceramic artefacts using pEDXRF and statistical pattern recognition

    Gajić-Kvaščev Maja D / Marić-Stojanović Milica D / Jančić-Heinemann Radmila M / Kvaščev Goran S / Andrić Velibor

    Chemistry Central Journal, Vol 6, Iss 1, p

    2012  Volume 102

    Abstract: Abstract Background Portable energy dispersive X-ray fluorescence (pEDXRF) spectrometry analysis was applied for the characterisation of archaeological ceramic findings from three Neolithic sites in Serbia. Two dimension reduction techniques, principal ... ...

    Abstract Abstract Background Portable energy dispersive X-ray fluorescence (pEDXRF) spectrometry analysis was applied for the characterisation of archaeological ceramic findings from three Neolithic sites in Serbia. Two dimension reduction techniques, principal component analysis (PCA) and scattering matrices-based dimension reduction were used to examine the possible classification of those findings, and to extract the most discriminant features. Results A decision-making procedure is proposed, whose goal is to classify unknown ceramic findings based on their elemental compositions derived by pEDXRF spectrometry. As a major part of decision-making procedure, the possibilities of two dimension reduction methods were tested. Scattering matrices-based dimension reduction was found to be the more efficient method for the purpose. Linear classifiers designed based on the desired output allowed for 7 of 8 unknown samples from the test set to be correctly classified. Conclusions Based on the results, the conclusion is that despite the constraints typical of the applied analytical technique, the elemental composition can be considered as viable information in provenience studies. With a fully-developed procedure, ceramic artefacts can be classified based on their elemental composition and well-known provenance.
    Keywords pEDXRF spectrometry ; Pattern recognition ; Dimension reduction ; Feature extraction ; Classification ; Cultural Heritage ; Neolithic ceramics ; Chemistry ; QD1-999
    Subject code 006
    Language English
    Publishing date 2012-09-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  6. Article ; Online: The use of image analysis for the study of interfacial bonding in solid composite propellant

    Dostanić Jasmina / Ušćumlić Gordana / Volkov-Husović Tatjana / Jančić-Heinemann Radmila / Mijin Dušan

    Journal of the Serbian Chemical Society, Vol 72, Iss 10, Pp 1023-

    2007  Volume 1030

    Abstract: In the framework of this research, the program Image Pro Plus was applied for determining the polymer-oxidizer interactions in HTPB-based composite propellants. In order to improve the interactions, different bonding agents were used, and their ... ...

    Abstract In the framework of this research, the program Image Pro Plus was applied for determining the polymer-oxidizer interactions in HTPB-based composite propellants. In order to improve the interactions, different bonding agents were used, and their efficiency was analyzed. The determination of the quantity, area and radius of non-bonded oxidizer crystals is presented. The position of formed cracks in the specimen and their area have a great influence on the mechanical properties of composite propellant. The preparation of the composite propellant in order to enable the photographing of their structure by means of stereoscopic and metallographic microscopes with the digital camera is also described as well. .
    Keywords composite propellant ; interactions ; grain distribution ; dewetting ; image analysis ; mechanical properties ; Chemistry ; QD1-999
    Language English
    Publishing date 2007-01-01T00:00:00Z
    Publisher Serbian Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  7. Article ; Online: The effect of alumina nanofillers size and shape on mechanical behavior of PMMA matrix composite

    Ben Hasan Somaya Ahmed / Dimitrijević Marija M. / Kojović Aleksandar / Stojanović Dušica B. / Obradović-Đuričić Kosovka / Jančić-Heinemann Radmila M. / Aleksić Radoslav

    Journal of the Serbian Chemical Society, Vol 79, Iss 10, Pp 1295-

    2014  Volume 1307

    Abstract: Composites with the addition of alumina nanofillers show improvement in mechanical properties. The PMMA polymer was used as a matrix and two different types of nanofillers, having extremely different shapes were added in the matrix to form the composite. ...

    Abstract Composites with the addition of alumina nanofillers show improvement in mechanical properties. The PMMA polymer was used as a matrix and two different types of nanofillers, having extremely different shapes were added in the matrix to form the composite. Reinforcements were based on alumina nanoparticles having either spherical shape or whiskers having the length to diameter ratio of 100. The influence of alumina fillers size, shape and fillers loading on mechanical properties of prepared composite were studied using the nanoindentation measurements and dynamic mechanical analysis. It was observed that both alumina whiskers and alumina spherical nanoparticles added in the PMMA matrix improved the mechanical properties of the composite but the improvement was significantly higher with alumina whisker reinforcement. The concentration of the reinforcing alumina spherical nanoparticles and alumina whiskers in PMMA matrix varied up to 5 wt. %. The best performance was obtained by the addition of 3 wt. % of alumina whiskers in the PMMA matrix with regard to mechanical properties of the obtained composite.
    Keywords polymer composite ; particle shape ; nanoindentation ; dynamic mechanical analysis ; Chemistry ; QD1-999 ; Science ; Q
    Subject code 670
    Language English
    Publishing date 2014-01-01T00:00:00Z
    Publisher Serbian Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  8. Article ; Online: The effect of alumina nanofillers size and shape on mechanical behavior of PMMA matrix composite

    Ben Hasan Somaya Ahmed / Dimitrijević Marija M. / Kojović Aleksandar / Stojanović Dušica B. / Obradović-Đuričić Kosovka / Jančić-Heinemann Radmila M. / Aleksić Radoslav

    Journal of the Serbian Chemical Society, Vol 79, Iss 10, Pp 1295-

    2014  Volume 1307

    Abstract: Composites with the addition of alumina nanofillers show improvement in mechanical properties. The PMMA polymer was used as a matrix and two different types of nanofillers, having extremely different shapes were added in the matrix to form the composite. ...

    Abstract Composites with the addition of alumina nanofillers show improvement in mechanical properties. The PMMA polymer was used as a matrix and two different types of nanofillers, having extremely different shapes were added in the matrix to form the composite. Reinforcements were based on alumina nanoparticles having either spherical shape or whiskers having the length to diameter ratio of 100. The influence of alumina fillers size, shape and fillers loading on mechanical properties of prepared composite were studied using the nanoindentation measurements and dynamic mechanical analysis. It was observed that both alumina whiskers and alumina spherical nanoparticles added in the PMMA matrix improved the mechanical properties of the composite but the improvement was significantly higher with alumina whisker reinforcement. The concentration of the reinforcing alumina spherical nanoparticles and alumina whiskers in PMMA matrix varied up to 5 wt. %. The best performance was obtained by the addition of 3 wt. % of alumina whiskers in the PMMA matrix with regard to mechanical properties of the obtained composite.
    Keywords polymer composite ; particle shape ; nanoindentation ; dynamic mechanical analysis ; Chemistry ; QD1-999
    Subject code 670
    Language English
    Publishing date 2014-01-01T00:00:00Z
    Publisher Serbian Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Article ; Online: The use of image analysis for the interaction of 1,3,5-trisubstituted isocyanurates with oxidizer and different binders in composite materials

    Dostanić Jasmina / Barbu Mihela / Jančić-Heinemann Radmila / Volkov-Husović Tatjana / Ušćumlić Gordana / Mljin Dušan

    Hemijska Industrija, Vol 60, Iss 3-4, Pp 72-

    2006  Volume 77

    Abstract: Composite propellants are non-homogenous propellants and comprise primarily crystalline oxidizer and metal fuels uniformly suspended in a resin binder. The strength of the bonds between the polymer matrix and the oxidizer determine the mechanical ... ...

    Abstract Composite propellants are non-homogenous propellants and comprise primarily crystalline oxidizer and metal fuels uniformly suspended in a resin binder. The strength of the bonds between the polymer matrix and the oxidizer determine the mechanical properties of composite propellants. In order to achieve good mechanical properties of the fuel, bonding agents are added to the mixture. The role of the bonding agents is to enable good interactions (interphase) between the polymer matrix and the oxidizer grains. The level of interconnection between the phases could be measured by using the surface obtained by cutting the composite material and observing the resulting surface. A problem in the visualization of such a material is to enable the visibility of the polymer matrix and the grains in the image as both phases are white. There are two possible ways to overcome this problem: to add a pigment into the matrix polymer and to color the matrix and make it different from the grain color. Another possibility is to find a solvent for one of the phases and to dissolve one of the phases in an appropriate solvent so that the remaining phase could be stained, photographed and analyzed using the image analysis program. The morphological characteristics of the image could be established and analyzed. The topic of this study was to establish the conditions of preparation of composite propellants containing ammonium per chlorate and HMX and RDX as oxidizers, and polymer of the polybutadiene type and 1,3,5-trisubstituted isocyanurates as bonding agents. The bonding phenomenon was investigated by optical microscopy. The established procedure of preparation will enable the visualization of the composite structure and the morphological characteristics of the surface will be obtained. From the morphological properties of the obtained composite, it will be possible to select a suitable polymer for the preparation of uniformly distributed composite propellant.
    Keywords composite propellants ; image analysis ; bonding agent ; polymer binder ; Chemistry ; QD1-999 ; Science ; Q ; DOAJ:Chemistry (General) ; DOAJ:Chemistry
    Subject code 540
    Language English
    Publishing date 2006-01-01T00:00:00Z
    Publisher Association of Chemical Engineers, Belgrade
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  10. Article ; Online: Non-destructive characterisation and classification of ceramic artefacts using pEDXRF and statistical pattern recognition.

    Gajić-Kvaščev, Maja D / Marić-Stojanović, Milica D / Jančić-Heinemann, Radmila M / Kvaščev, Goran S / Andrić, Velibor Dj

    Chemistry Central journal

    2012  Volume 6, Issue 1, Page(s) 102

    Language English
    Publishing date 2012-09-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 2272440-0
    ISSN 1752-153X ; 1752-153X
    ISSN (online) 1752-153X
    ISSN 1752-153X
    DOI 10.1186/1752-153X-6-102
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top