Effect of Methanol and Water Extract of African Lettuce (Lactuca taraxacifolia) on Stability of Refined Palm Kernel Oil

Arawande, J. O.; Ogunyemi, Oludaremichael

doi:10.1016/s0189-7241(15)30027-8

Cited by 6 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effectiveness of antioxidants of phenolic compounds from some plant sources in retarding lipid deterioration have been reported (Arawande and Ogunyemi, 2012;Rehab, 2010;Arawande and Komolafe, 2010;Arawande and Abitogun, 2009;El-Anany, 2007;Farag et al, 2006;Shaker, 2006;Farag et al, 2003;Wanasundara and Shahidi, 1998;Tian and White, 1994). Owing to carcinogenicity of synthetic antioxidants, the exploration for safer natural sources of antioxidants continues to gather momentum.…”

Section: Introductionmentioning

confidence: 99%

Comparison of antioxidative effects of methanol orange peel extract and butylatedhydroxytoluene on stability of crude peanut oil

Arawande¹,

Borokini²

2015

Nigerian Food Journal

Self Cite

View full text Add to dashboard Cite

The antioxidative effects of methanol orange peel extract (MOPE) and butylatedhydroxytoluene (BHT) on stability of crude peanut oil (CPO) stored for twelve months in white transparent plastic bottles at room temperature (27-33 1C) were investigated. Extract of orange peel was prepared by dissolving 20 g of dried, ground and sieved sweet orange peel into 200 ml of methanol for three days. The methanol orange peel extract (MOPE) was added at varying concentrations (200-1000 ppm) to CPO. Another set of CPO which contained 200 ppm BHT as well as CPO that contained no additive was also set up. The colour and refractive indices of oil samples were immediately determined while free fatty acid (FFA), acid value (AV) and peroxide value (PV) of CPO samples were determined monthly using standard methods. The colour of CPO containing additives (MOPE and BHT) and that which contained no additive (0 ppm) was 30.0 units in 1/2 00 cell. The refractive index of CPO containing varying concentrations of MOPE ranged between 1.464 and 1.465 while CPO containing no additive (0 ppm) and 200 ppm BHT was 1.463. There was no significant difference at Po 0.05 in FFA, AV and PV of CPO containing MOPE, BHT and CPO containing no additive. The FFA, AV and PV of CPO containing additive (MOPE and BHT) were lower than that of CPO containing no additive. BHT was better in stabilizing hydrolytic rancidity of CPO while MOPE was superior to BHT in stabilizing CPO against oxidative rancidity. & 2015 The Authors. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of antioxidative effects of methanol orange peel extract and butylatedhydroxytoluene on stability of crude peanut oil

Arawande¹,

Borokini²

2015

Nigerian Food Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…The RI of RPO was maintained at 1.465 ± 0.05 throughout the study period in both conditions, while RI of UPO showed a slight difference from 1.465 ± 0.05 to 1.480 ± 0.05 on storage. A study (Arawande & Ogunyemi, ) on the addition of African Lettuce extract in refined palm kernel oil at varying concentration of 200 ppm to 1,000 ppm showed the refractive index of 1.454 to be almost similar to the refined palm oil kernel with no additive (1.455).…”

Section: Resultsmentioning

confidence: 99%

“…A study (Arawande & Ogunyemi, 2012) on the addition of African Lettuce extract in refined palm kernel oil at varying concentration of 200 ppm to 1,000 ppm showed the refractive index of 1.454 to be almost similar to the refined palm oil kernel with no additive (1.455).…”

Section: Refractive Index (Ri) Of Oilsmentioning

confidence: 99%

Improved oxidative stability of peanut oil through addition of finger millet (Eleusine coracana) seed coat polyphenols

Balasubramaniam

Sathvika

Palaniappan

et al. 2019

J Food Process Engineering

View full text Add to dashboard Cite

The effect of polyphenols from finger millet seed coat (FMSC) on the oxidative stability of refined peanut oil (RPO) and unrefined peanut oil (UPO), at different concentrations and storage conditions was compared with butylated hydroxytoluene (BHT). A significant dose‐dependent reduction of oxidation in RPO compared with UPO was observed. FMSC polyphenols at 800 ppm inhibited oxidation equivalent to BHT (200 ppm), while at 1000 ppm, FMSC effectively reduced the peroxide value (5.1 ± 0.3 and 9.5 ± 0.5 meq/kg oil), acid value (0.97 ± 0.3 and 1.16 ± 0.4 KOH/g), and Thiobarbituric acid reactive species (TBARS) (18.08 ± 0.39 and 20.32 ± 0.56 mg MDA/kg) in RPO and UPO, respectively, during regular storage (RS; 28 ± 5°C, 7 weeks). Oxidative deterioration was higher in terms of all parameters in the oils during accelerated conditions (AS; 65 ± 5°C, 6 days). The Rancimat induction time confirmed the stability of both RPO and UPO in the presence of polyphenols. Regular storage up to 7 weeks and accelerated storage (AS) up to 3rd day (equivalent to 3 months) were achieved with FMSC polyphenols (1,000 ppm), confirming its potential as a natural antioxidant in vegetable oils. Practical applications Peanut oil contains high levels of PUFA that are susceptible to lipid oxidation leading to rancidity and off flavors. The food industry relies largely on synthetic antioxidants such as butylated hydroxytoluene (BHT), butylated hydroquinone (BHQ) and tert‐butyl hydro quinine (TBHQ) to inhibit deterioration caused by fats; however synthetic compounds have shown toxic effects. The study demonstrates the ability of finger millet polyphenols in delaying oxidation in both refined and unrefined peanut oils. Millet polyphenols as potential antioxidants in lipid food systems have the added advantage of providing food safety while maintain quality.

show abstract

“…27 Methanolic extract obtained from seeds and pulp of the date showed strong antioxidant effects in vitro. 28 Antioxidant, 28,29 anti-mutagens, 23 anti-neoplastic 22 and antiaging 26 effects reported for the date fruit and given that the induction of apoptosis in cancer cells is one of the highly desired mechanism of function for cancer therapy 30 directed us to examine the possible apoptotic effect of the methanolic extract of date seed in human colon cancer cells.…”

Section: Discussionmentioning

confidence: 99%

Date Seed Extract Diminished Apoptosis Event in Human Colorectal Carcinoma Cell Line

Rezaeian¹

2015

MOJT

View full text Add to dashboard Cite

Apoptosis, or programmed cell death, is an essential process to remove the damaged or abnormal cancerous cells. Therefore, the study of apoptosis-inducing agents helps identifying new drugs for cancer therapy. The aim of this study was to evaluate the apoptotic effect of methanolic extract of date seed in human colon cancer cell. HT29 cells were cultured and exposed to different concentrations of date seed extract (100, 200 and 400µg/ml). Neutral comet assay was used and the patterns were classified into four groups based on the tail length and head size. Results showed that the extract has not been able to induce apoptosis in HT29 cells. Amazingly, the rate of apoptosis observed in the HT29 cells exposed to the extract, was lower than the negative control group that received no treatment. While the methanolic extract of date seed did not induce apoptosis in colon tumor cells its supporting effect on HT29 cells survival may fuels more investigation.

show abstract

Effect of Methanol and Water Extract of African Lettuce (Lactuca taraxacifolia) on Stability of Refined Palm Kernel Oil

Cited by 6 publications

References 9 publications

Comparison of antioxidative effects of methanol orange peel extract and butylatedhydroxytoluene on stability of crude peanut oil

Comparison of antioxidative effects of methanol orange peel extract and butylatedhydroxytoluene on stability of crude peanut oil

Improved oxidative stability of peanut oil through addition of finger millet (Eleusine coracana) seed coat polyphenols

Date Seed Extract Diminished Apoptosis Event in Human Colorectal Carcinoma Cell Line

Contact Info

Product

Resources

About