Autor: Mahto, S. K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Preparation of psyllium husk powder based microporous composite scaffolds for tissue engineering
Autorzy:: Poddar, S.
Agarwal, P. S.
Mahto, S. K.
Powiązania:: https://bibliotekanauki.pl/articles/284676.pdf
Data publikacji:: 2018
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: composites
tissue engineering
regeneration
Źródło:: Engineering of Biomaterials; 2018, 21, 148; 48
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Preparation of psyllium husk powder based microporous composite scaffolds for tissue engineering
Autorzy:: Poddar, S.
Agarwal, P. S.
Mahto, S. K.
Powiązania:: https://bibliotekanauki.pl/articles/285978.pdf
Data publikacji:: 2018
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: psyllium husk powder
EDC-NHS coupling reaction
microporous scaffolds
hydrogel
freeze-drying
vacuum desiccation
Opis:: This study demonstrates the comparison in the method of fabrication and thus evaluates the potential of psyllium husk powder and gelatin-based composite microporous scaffolds for tissue engineering applications. The scaffold is being prepared in three different ratios of 50:50, 75:25 and 100 (w/w of psyllium husk powder and gelatin, respectively) by employing a suitable cross-linking agent, EDC-NHS, followed drying. We have demonstrated the use and outcomes of two different methods of scaffold drying, i.e., vacuum desiccation along with liquid nitrogen dip and lyophilization. It was concluded from the SEM micrographs that the scaffolds dried under vacuum accompanied with liquid nitrogen exposure exhibited less porous architecture when compared to those prepared using a lyophilizer, that resulted in pores in the range of 60-110 μm. Scaffolds fabricated using the former technique lost porosity and sponge-like characteristics of a scaffold. In spite of the above fact, water retaining capacity and stability in the cell culture of such scaffolds is significant, nearly 40-50% of its initial dry weight. Cell culture experiments support the potential of the scaffolds prepared from different methods of fabrication for its cytocompatibility and suitability for cell growth and proliferation for a substantial duration. Erosion in the porous design of the scaffolds was observed after 14 days via SEM micrographs. It was inferred that freeze-drying is a better technique than vacuum desiccation for scaffold preparation. The present investigation has been conducted keeping in mind the importance of drying a scaffold. Scaffold drying is a necessary step to increase its shelf-life, makes it easy to transport and much importantly, controlling the pore size of the scaffold.
Źródło:: Engineering of Biomaterials; 2018, 21, 147; 2-6
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Change in entropy of the spinning black holes
Autorzy:: Mahto, D.
Singh, A. S.
Vineeta, K.
Kumar, A.
Powiązania:: https://bibliotekanauki.pl/articles/411895.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Event-horizon
AGN
Entropy & Energy
Opis:: Aims: To derive an expression for change in entropy of spinning black holes on the basis of the model for the energy of spinning black holes E _BHs= K_BHs R'_s ( Mahto et al. 2011a) & the model for entropy change δS _bh = [wzór]δE ( Mahto et al. 2011b) and then calculate their values for different test spinning black holes. Study Design: Data for the mass of black holes have collected from the research paper entitled :Super massive Black Holes in Galactic Nuclei: Past Present & Future Research(2005), Space Science Reviews by L. Ferrarese & H. Ford and Black holes in Astrophysics(2005), New Journal Physics by R. Narayan. The data for black hole constant for spinning black holes (K_BHs = 1.214x10⁴⁴) is taken from the paper entitled: Study of Schwarzschild radius with reference to the spinning black holes. Bulletin of Pure and Applied Sciences (2011a). Place and Duration of Study: Department of Physics, Marwari College Bhagalpur and University Department of Physics, T.M.B.U. Bhagalpur, between December 2013 and March 2014. Methodology: A theoretical based work using Laptop to calculate the calculation for change in entropy of different test spinning black holes at Marwari College Bhagalpur and the residential research chamber of the first author. Results: The calculation shows that the change in entropy of spinning black holes of the rest masses for stellar – mass black holes (M ~ 5 – 20 Mʘ) in X-ray binaries is 2.483x10 ⁶³ to 39.731x10 ⁶³ J/K and for the super massive Black holes (M ~ 10⁶ – 10^9.5 Mʘ) in active galactic nuclei is 9.932x10 ⁷³ to 28.432x10 ⁸⁰ J/K. The nature of the graph for XRBs is the same to the Hawking entropy with the event horizon and straight line for AGN which confirms the validity of equations E_BHs=K_BHs R’_{s_{and δS _bh = [wzór]δE .Conclusion: The change in energy and entropy of black holes are mainly dependent on the mass and independent of their event horizons.}}
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2014, 13, 2; 95-103
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

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