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Wyświetlanie 1-2 z 2
Tytuł:
Ephedrine production from suspension cultures of Ephedra alata L. callus
Autorzy:
Hegazi, G.A.
Ghareb, H.E.
Gabr, M.F.
Powiązania:
https://bibliotekanauki.pl/articles/2096962.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
shake-flask culture
in vitro
alkaloid
biotic elicitor
Aspergillus niger
yeast extract
Opis:
Ephedra alata is an important Egyptian medicinal plant with enormous applications in pharmaceutical industry. Shake-flask suspension cultures of E. alata were established from internodal segment-derived callus. The suspension cultures were treated with two biotic elicitors, namely Aspergillus niger and yeast extract, to enhance the synthesis of ephedrine – the bioactive constituent of E. alata. Ephedrine was quantified using the high performance liquid chromatography technique. Ephedrine concentration was not directly related to biomass production. Aspergillus niger and yeast extract enhanced the production of ephedrine by 2.5- to 7-fold after different durations of incubation as compared to ephedrine content in the mother plant. Treatment with the fungal elicitor A. niger extract induced the maximum accumulation of ephedrine at the concentration of 1.67%; it also increased ephedrine biosynthesis by 7-fold in 24-day-old culture as compared to the ephedrine content in the mother plant and caused higher ephedrine biosynthesis than that in the control treatment without elicitors. The present protocol could be applicable for the large-scale production of ephedrine from E. alata.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 1; 25-33
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
Autorzy:
An, Q.
Fan, K. Y.
Ge, Y. F.
Liu, B. X.
He, J.
Wang, S.
Chen, C. X.
Ji, P. G.
Tolochko, O.
Powiązania:
https://bibliotekanauki.pl/articles/2049433.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stainless steel clad plate
interface characteristics
bending behavior
impact morphologies
delamination crack
Opis:
The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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