Comparison of Functional Components and Physiological Activities in Peanut Hull Extracts by Cultivars and Extraction Solvent

Abstract

This study was performed to investigate the functional components and physiological activities of peanut hull extracts (PHEs) from two different cultivars (Arachis hypogaea L. cv. Sinpalkwang and cv. K-Ol) according to extraction methods. PHEs were extracted using 100% acetone, 50% methanol, and 100% methanol. Extraction using 50% methanol resulted in higher yields from both cultivars compared to other extraction solvents 16.43% (Sinpalkwang) and 12.71% (K-Ol). The highest luteolin content (0.65∼1.70 mg/g dry weight) and the highest eriodictyol content (0.27∼1.23 mg/g dry weight) were observed using 100% methanol extract from Sinpalkwang cultivar. ABTS radical scavenging activity showed its highest value in 50% methanol extract, whereas DPPH radical scavenging activity and FRAP value showed the highest value in 100% methanol extract. The 50% methanol extract of Sinpalkwang cultivar showed α-glucosidase inhibition activity (IC50: 0.74 mg/mL), whereas the 100% acetone extract of Sinpalkwang cultivar showed the most effective angiotensin converting enzyme (ACE) inhibitory activity (IC50: 7.97 mg/mL). Moreover, the 50% methanol extract of K-Ol cultivar showed the most effective anti-tyrosinase activity (IC50: 12.94 mg/mL), whereas the 100% acetone extract of K-Ol cultivar was most effective at inhibiting xanthine oxidase (IC50: 3.11 mg/mL). These results suggest that PHE possesses physiological activity and provides valuable information and evidence for the use of peanut byproduct as a functional food and cosmetic material.

Effect of Atmospheric-Pressure Plasma on Functional Compounds and Physiological Activities in Peanut Shells

“…The antioxidant capacity of polyphenols can be evaluated based on their free-radical scavenging activity and reductive potential. As shown in Table 2 , the FRAP activity in the control peanut shell was 1.29 mM, similar to a previously reported value of 1.18 mM, while the DPPH activity in the control (156.33 mg TE/g) was lower than that reported previously (411.5 mg TE/g after correction according to mg TE/g) [ 18 ]. The variation in antioxidant activity of components in peanut shells reported in the literature is probably due to differences in harvest times and extraction methods.…”

“…The AP plasma-treated peanut shells were ground into a fine powder (which passed through a 100 mesh) with a blender. The peanut shell extraction was conducted according to our previous study with slight modifications [ 18 ]. Briefly, 40 mL of 80% ethanol was added to 4 g of sample.…”

“…The flavonoids in AP plasma-treated peanut shells were analyzed using the method applied in our previous study, with slight modifications [ 18 ]. The peanut shell extract was filtered through 0.22 µm polyvinylidene fluoride syringe filters (Acrodisc LC 13 mm syringe filter; Pall Corporation, Port Washington, NY, USA) and subjected to HPLC for flavonoid analysis (Chromaster; Hitachi Ltd., Tokyo, Japan).…”

“…The scavenging activities of the 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical- and ferric-reducing antioxidant power (FRAP) assays were analyzed to evaluate the antioxidant activity of components in AP plasma-treated peanut shells. The assays were conducted based on the method used in our previous study, with some modifications [ 18 ]. The peanut shell extract was diluted at 1 mg/mL in DMSO and all experiments were performed in triplicate under subdued light.…”

Antioxidant, α-amylase and α-glucosidase inhibitory ability effects of sesame meal ethanol extract

“…을 함유하지만 대부분 폐기되거나 사료로 사용되고 있고 [9], 폐 기물 재활용 측면과 폐기되어 쓰레기 문제 등을 개선하는데 땅 콩껍질은 염재로 염색성을 평가하였다 [10]. 또한 식물성 단백질 원료인 콩은 두부 제조 후 대두박이 남고 참깨는 착유 후 부산 물로 참깨박을 얻어지는데 이를 사료를 만들어 사용하고 있는 데 대부분 폐기되고 있는 실정이다 [14].…”