Components of Unsaponifiable Matter of Rice Bran Oil

Akiya, Toshimi

doi:10.1080/00021369.1962.10857952

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…The % recovery of soapstock was lowest in acetone, whereas the % purity of γ‐oryzanol was lowest in isopropanol. These variations in the recovery of soapstock may be mainly due to the composition of the soapstock from rice bran oil, which also contains 200–220 g kg −1 soap, 20–25 g kg −1 glycerides and 70–75 g kg −1 unsaponified matter 12. The % recovery of the extract in a particular solvent therefore depends on the solubility of the solvent with γ‐oryzanol as well as the above impurities.…”

Section: Resultsmentioning

confidence: 99%

Preferential extractability of γ‐oryzanol from dried soapstock using different solvents

kumar¹,

Tiku²,

Prakash³

2008

J Sci Food Agric

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BACKGROUND: γ -Oryzanol from rice bran has lately gained potential importance because of its proven health benefits. Thus the extractability of γ -oryzanol from the soapstock of crude rice bran oil is important from the perspective of future large-scale production, which would give value addition to this by-product obtained from the rice bran oil industry. The aim of the present study was to investigate the extraction of γ -oryzanol from the drum-dried soapstock of rice bran oil using various solvents.

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Section: Resultsmentioning

confidence: 99%

Preferential extractability of γ‐oryzanol from dried soapstock using different solvents

kumar¹,

Tiku²,

Prakash³

2008

J Sci Food Agric

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“…The result suggests that it is possible that HE released more oil content but unsaponifiable matter compared with other extraction methods. The highest viscosity value of oil is partly attributed to unsaponifiable matter, which is numerous, including hydrocarbons, tocopherol, high alcohols, sterols, squalene, ferulic acid esters [ 81 ] and to impurity levels such as non-TAG, metal ions, pigment compounds, odors, and gums [ 82 ]. The gum of oil extracted from white rice bran by SUBLDME was the highest at 5.44% compared with that by the SF-CO 2 method (2.27%) (data not shown).…”

Section: Resultsmentioning

confidence: 99%

Bioactives from Crude Rice Bran Oils Extracted Using Green Technology

Wongwaiwech

Kamchonemenukool

et al. 2023

Molecules

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Crude rice bran oils from different rice cultivars and extraction methods bear different contents of nutraceuticals. The health benefits of lowering cholesterol activity of rice bran oil being confirmed by many reports are partly attributed to non-nutrient nutraceuticals, especially γ-oryzanol, phytosterols, and policosanols. As the world has been facing the global warming crisis, green extraction technology is gaining attention from many sectors. The current study aims to compare the nutraceutical composition with respect to γ-oryzanol, phytosterol, and policosanol content as well as the antioxidant properties of crude rice bran oils extracted from white and red rice bran using three green technologies, comparing with conventional hexane extraction. The data show that the traditional solvent extraction gave the highest oil yield percentage (26%), but it was not significantly different from subcritical liquefied dimethyl ether extraction (24.6%). Subcritical liquefied dimethyl ether extraction gave higher oil yield than supercritical CO2 extraction (15.5–16.2%). The crude rice bran oil extracted using subcritical liquefied dimethyl ether extraction produced the highest total phenolic contents and antioxidant activities. The highest γ-oryzanol content of the crude rice bran oil was found in oil extracted by conventional cold press (1370.43 mg/100 g). The γ-oryzanol content of the oil obtained via subcritical liquefied dimethyl ether extraction was high (1213.64 mg/100 g) compared with supercritical CO2 extraction. The red rice bran yielded the crude rice bran oil with the highest total phytosterol content compared with the white bran, and the oil from red rice bran extracted with subcritical liquefied dimethyl ether generated the highest total phytosterol content (1784.17 mg/100 g). The highest policosanol content (274.40 mg/100 g) was also found in oil obtained via subcritical liquefied dimethyl ether extraction.

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On the Applicability of the Oryzanol–Sitosterol Structuring System

Scharfe

Flöter

2022

Development of Trans-Free Lipid Systems and Their Use in Food Products

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This chapter discusses the applicability of oleogels in food products with a particular focus on the sitosterol–oryzanol binary structuring system. Whether the cause for the practical absence of food products utilizing oleogels in the market is due to costs or legal hurdles remains unanswered. The well-studied physical chemistry of the sterol structuring system and its implications for food applications are reviewed. The best structuring results are obtained with the equimolar application of the two structurants, when the water activity of the system is kept below 0.9. The evaluation of standard methods to characterize oleogels indicates that it remains unresolved which methods are most suited to issue relevant statements regarding their product functionality. That is illustrated by reviewing the successful development of product prototypes.

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Components of Unsaponifiable Matter of Rice Bran Oil

Cited by 3 publications

References 3 publications

Preferential extractability of γ‐oryzanol from dried soapstock using different solvents

Preferential extractability of γ‐oryzanol from dried soapstock using different solvents

Bioactives from Crude Rice Bran Oils Extracted Using Green Technology

On the Applicability of the Oryzanol–Sitosterol Structuring System

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