scholarly journals Antioxidant activity of extract from some squid species in Khanh Hoa

2021 ◽  
Vol 20 (4A) ◽  
pp. 187-198
Author(s):  
Nguyen Phuong Anh ◽  
Pham Xuan Ky ◽  
Dao Viet Ha ◽  
Le Ho Khanh Hy ◽  
Doan Thi Thiet ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Functional Group ◽  
Methanol Extract ◽  
Antioxidant Activities ◽  
Group Analysis ◽  
Squid Species ◽  
Crude Extracts ◽  
Sepia Esculenta ◽  
Sds Page ◽  
Functional Group Analysis

The antioxidant activities against DPPH free radical of crude extracts using ethyl acetate and methanol from ink sac, muscles, and bones of 5 squid species (Uroteuthis chinensis, Uroteuthis sibogae, Uroteuthis duvaucelii, Sepia esculenta, Sepioteuthis lessoniana) collected in Khanh Hoa waters were investigated. These activities ranged from 4.21% (ethyl acetate extract from ink of U. chinensis) to 54.51% (methanol extract from muscle of S. esculenta.). The functional group analysis by infrared adsorption spectrum (FTIR) in these crude extracts revealed the absorption peaks of melanin in ink, polysaccharide in bone and protein in muscle extracts. In addition, the SDS-PAGE result of some methanol extracts showed the presence of proteins with a molecular weight of 30-150 kDa.

scholarly journals Limpasu Pericarpium : an Alternative Source of Antioxidant From Borneo with Sequential Maceration Method

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Irfan Zamzani ◽  
Nita Triadisti
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Oxidation Process ◽  
Antioxidant Activities ◽  
Alternative Source ◽  
Dpph Method ◽  
Indigenous Plant ◽  
Ic50 Values

Antioxidants are substances that can slow down the oxidation process of free radicals. Limpasu plant (Baccaurea lanceolata (Miq) Muell. Arg), an indigenous plant of Borneo, is a natural antioxidant source. The purpose of this study was to determine the antioxidant activity of the limpasu pericarpium extract. The extraction of the limpasu pericarpium was done by maceration method using solvents with increasing polarity ranging from n-hexane, ethyl acetate, and methanol. Antioxidant activities of the three extracts were measured by the DPPH and FRAP methods. The IC50 values of n-hexane, ethyl acetate, and methanol extracts, as well as quercetin using the DPPH method were 517,45 µg/mL, 530,64 µg/mL, 10,63 µg/mL and 6,83 µg/mL, respectively. Meanwhile, the IC50 values obtained from FRAP method were 198,96 µg/mL, 190,07 µg/mL, 661,36 µg/mL, and 7,09 µg/mL, respectively. The results revealed that the methanol extract is more potent than other extracts tested for antioxidant activity.

Structural, morphological, and functional group analysis of corncob powder

2020 ◽  
Author(s):  
Pelangi Eka Yuwita ◽  
Kusuma Wardhani Mas'udah ◽  
Sunaryono ◽  
Ahmad Taufiq
Keyword(s):  
Functional Group ◽  
Group Analysis ◽  
Functional Group Analysis
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