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Wyszukujesz frazę "differential scanning calorimetry" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Synthesis and thermal decomposition study of some dihydropyridine derivatives
Autorzy:
Baluja, Shipra
Talaviya, Rahul
Powiązania:
https://bibliotekanauki.pl/articles/1192993.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
differential scanning calorimetry
dihydropyridine derivatives
thermo gravimetric analysis
Opis:
Some new dihydropyridine derivatives have been synthesized and their characterization was done by FT-IR, 1H NMR and Mass spectral data. Thermal analysis of these dihydropyridine derivatives have been carried out by thermao gravimetric (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) techniques. Further, from thermograms of these compounds, various kinetic parameters such as order of reaction (n), energy of activation (E), frequency factor (A) and entropy change (∆S) have been evaluated. The obtained results indicates that thermal stability of dihydropyridine derivatives have been depend on the type of substituent present in the compounds.
Źródło:
World Scientific News; 2016, 39; 1-16
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of conventional and crosslinked ultra high molecular weight polyethylene (UHMWPE) used in hip implant
Autorzy:
Laska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1178415.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Differential Scanning Calorimetry
acetabular cup
conventional UHMWPE
crosslinked UHMWPE
structural parameters
Opis:
Since the 1960s UHMWPE has been the material of choice for bearing surfaces in total hip replacements. In spite of its clinical success over years, a large number of necessary revisions has been recently reported. The clinical life span of the hip prostheses is limited by weardebris-induced osteolysis and aseptic loosening. The problem is very complex because of the variety of factors affecting UHMWPE. Nowadays, scientists are working on how optimally adjust the material properties and the implant design in order to increase wear resistance and retain other mechanical properties. The aim of the study is to investigate structural parameters of two UHMWPE material states – conventional (non-crosslinked) and crosslinked. Those types of UHMWPE show slightly different properties, which can affect further behaviour in human body. The comparison between conventional and crosslinked UHMWPE is presented. Differential Scanning Calorimetry (DSC) is the analysis method applied in the research. The structural parameters of UHMWPE are correlated with its mechanical and tribological properties.
Źródło:
World Scientific News; 2017, 73; 51-60
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and thermal decomposition kinetics of some pyrazolo-quinazoline derivatives
Autorzy:
Baluja, Shipra
Nandha, Kajal
Powiązania:
https://bibliotekanauki.pl/articles/1193006.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Pyrazolo-quinazolines
chalcones
differential scanning calorimetry
kinetic parameters
thermal gravimetric analysis
thermal stability
Opis:
Some new pyrazolo-quinazolines have been synthesized and characterization of the synthesized was done by IR, NMR and mass spectral data. The thermal properties of some synthesized compounds were studied by TGA and DSC methods. From the thermo grams, thermal stability and some kinetic parameters such as energy of activation, frequency factor, order of reaction and entropy of activation were evaluated. It is observed that for all the studied compounds, degradation is single step process. Thermal stability varies slightly according to the nature and position of the substitutions present in the studied compounds.
Źródło:
World Scientific News; 2016, 31; 100-110
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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