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Wyszukujesz frazę "response surface methodology RSM (metoda powierzchni odpowiedzi)" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Optimization of microwave-assisted extraction of phenolic compounds from ginger (Zingiber officinale Rosc.) using response surface methodology
Autorzy:
Huyen, T.T.
Quoc, L.P.T.
Powiązania:
https://bibliotekanauki.pl/articles/2049060.pdf
Data publikacji:
2020
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
antioxidant
extraction
ginger
microwave
phenolic compounds
response surface methodology (RSM)
antyoksydacja
ekstrakcja
imbir
promieniowanie mikrofalowe
związki fenolowe
response surface methodology RSM (metoda powierzchni odpowiedzi)
Opis:
Introduction: Ginger (Zingiber officinale Rosc.) is a common spice and precious herbal plant in Vietnam. It contains many bioactive compounds, especially phenolic compounds useful for human health. Hence, the extraction and application of these compounds in medical technology are necessary. Objective: The goal of this study is to determine the optimal extraction conditions with the assistance of microwave, for instance solvent/material ratio (ml/g), solvent concentration (%, v/v) and extraction time, on the extraction yield of ginger rhizome, such as total polyphenol content (TPC) and antioxidant capacity (AC). Methods: The dried sample was extracted by microwave-assisted extraction (MAE). TPC and AC of received extract were measured by the Folin-Ciocalteu method and phenanthroline assay. The optimization process used response surface methodology (RSM) (Central composite face design, CCF) with major influencing factors including solvent concentration, solvent/material ratio and extraction time. Results: The results showed that the optimal extraction conditions were the ethanol concentration of 60%, ethanol/material ratio of 48.6/1 (ml/g), extraction time of 1 minute. Conclusion: The maximum TPC and AC peaked at 27.89±1.99 mg GAE/g dry matter and 12.24±0.04 mmol Fe/g dry matter (DM) at optimal extraction conditions. Besides, some factors strongly affected the extraction yield and interacted together.
Źródło:
Herba Polonica; 2020, 66, 2; 19-27
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the effect of wire electric dischage machining process parameters on the formation of high speed steel form tool
Autorzy:
Ishfaq, Kashif
Mufti, Nadeem Ahmad
Jawad, Muhammad
Sajid, Muhammad
Jahanzaib, Mirza
Powiązania:
https://bibliotekanauki.pl/articles/103183.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wire electrical discharge machining (WEDM)
response surface methodology (RSM)
ANOVA
material removal rate (MRR)
surface roughness (Ra)
wycinanie elektroerozyjne drutem
metoda powierzchni odpowiedzi (RSM)
wskaźnik usuwania materiału (MRR)
chropowatość powierzchni (Ra)
Opis:
The use of form tools is growing in industry, owing to their inherent advantage of improving productivity. However, the accurate formation of form tool profile is a really tedious task. In this research work, wire electric discharge machining (WEDM) process has been used for the generation of a form tool. Pulse on-time, pulse off-time, servo voltage, wire tension, flushing pressure have been considered as input parameters, whereas tool geometry (clearance angle, included angle), surface roughness and material removal rate are the selected responses. Response surface methodology (RSM) (Box Bhenken experimental design) technique has been used for design of experiments. Analysis of Variance (ANOVA) has shown that pulse on-time and pulse off-time are the two influential control factors for material removal rate (MRR), surface roughness (Ra), clearance angle and included angle. Contour plot analysis has been performed to find out the optimal ranges of the most influential control factors for each response characteristics.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 89-98
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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