Extraction of Liberated Reducing Sugars from Rapeseed Cake via Acid and Alkali Treatments

Jeong, Hanseob; Kim, Ho‐Yong; Ahn, Sye-Hee; Oh, Sei-Chang; Yang, In; Choi, In‐Gyu

doi:10.3746/jkfn.2011.40.11.1575

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…There is a lot of utilization of rapeseed residues due to their high nutritive value and functional compounds such as amino acids, carotenoids, flavonoids, and glucosinolates [4]. Thus, rapeseed meals have been used for organic fertilizer, feed stuff for livestock, adhesive hydrolyzed by enzymes [5].…”

Section: Introductionmentioning

confidence: 99%

Identification and Determination of Phenolic Compounds in Rapeseed Meals (Brassica napus L.)

Yang¹,

Arasu²,

Chun³

et al. 2015

JACEN

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This study aimed in the identification and quantification of phenolic compounds in different four varieties of rapeseeds (Brassica napus L.) using LC-MS and HPLC. LC-MS analysis guided to identify 12 phenolic compounds including sinapine, sinapine(4-O-8')guaiacyl, feruloyl choline(4-O-8') guaiacyl, kaempferol-3-O-sinapoyl-sophoroside-7-O-glucoside, kaempferol-3-O-β-sophoroside, cyclic spermidine-alkaloid, feruloyl choline(5-8')guaiacyl, kaempferol-sinapoyl-trihexoside,1,2-di-O-sinapoyl-gentiobiose, 1,2-di-O-sinapoyl-glucose, feruloyl choline(4-O-8')guaiacyl-di-sinapoyl, and sinapine(4-O-8')guaiacyl-di-sinapoyl, respectively. Total phenolic compounds in rapeseed meals were ranged from 38.50 (2012 "Sunmang") to 63.95 mg/g dry weight (DW) (2014 Jeju local cultivar). Main phenolic compositions were cyclic spermidine-alkaloid, kaempferol, feruloyl choline, and sinapine. Sinapine was predominant compound among all the samples ranged from 29.74 to 52.24 mg/g DW (mean 79% of total phenolic contents). This study provided the information for the variation of phenolic compounds between the varieties of rapeseeds and the cultivation periods. Furthermore, this information can be developed for bio-energy industry as a reducer of the cost of the bio-energy products.

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Section: Introductionmentioning

confidence: 99%

Identification and Determination of Phenolic Compounds in Rapeseed Meals (Brassica napus L.)

Yang¹,

Arasu²,

Chun³

et al. 2015

JACEN

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“…The yield of SP, TS, and RSA in the 1 N HCl-EtOH extract proportionally increased with temperature 25-60℃ whereas the RS yield decreased from 0.243 (40℃) to 0.144 g-GE/g (60℃). The decrease in RS may be associated with the degradation and modification of the reducing groups of free sugars in the presence of HCl at a given temperature (Jeong et al, 2011). Macamide B yield in both the EtOH and 1 N HCl-EtOH extracts was approximately 84 μg/g and was independent of the extraction temperature above 40℃.…”

Section: Effect Of Extraction Temperature Time and The Solvent-to-solid Ratio On Mementioning

confidence: 98%

Simultaneous extraction of proteins and carbohydrates, including phenolics, antioxidants, and macamide B from Peruvian maca (Lepidium meyenii Walp.)

You¹,

Joung²,

Baek³

et al. 2021

Korean J. Food Preserv.

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Maca (Lepidium meyeniiWalp.) has been used for nutritional and traditional purposes, owing to its chemical composition and the presence of bioactive compounds. This study aimed to develop and optimize a maceration-based method for the simultaneous extraction of total phenolic compounds (TPCs), total flavonoids (TFs), radical-scavenging activity (RSA), soluble proteins (SPs), total sugars (TSs), reducing sugars (RSs), and macamide B from maca using 95% ethanol and acidified ethanol. The effects of extraction parameters, including temperature, solvent-to-solid ratio, time, and acid concentration, on the extraction yield of TPCs, TFs, RSA, SPs, TSs, RSs, and macamide B were investigated. Optimal extraction was achieved at 40-60℃ for 5-7.5 h with the solvent-to-solid ratio of 100:10. The addition of hydrochloric acid (HCl) to ethanol significantly improved the extraction yield, and maximum extraction was achieved using 1 N HCl in ethanol. The RSA of the ethanolic extracts showed a significant linear correlation (p<0.001) with total extraction yield, TPCs, SPs, and TSs. These results imply that polyphenolic compounds, SPs/peptides, and polysaccharides are important determinants for the antioxidant function of maca. The optimized condition may be employed in nutraceutical industries to extract bioactive compounds from maca.

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Separation of Reducing Sugars from Rape Stalk by Acid Hydrolysis and Fabrication of Fuel Pellets from its Residues

Yang¹,

Ahn²,

Kim³

et al. 2014

Korean Journal of Plant Resources

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-This study was conducted to identify the potential of rape stalk as a raw material for biorefinery process of rape flower. At first, rape stalk (RS) was immersed in distilled water (DW), acetic acid (AA), oxalic acid (OA), sulfuric acid (SA) and sodium hydroxide (SH) solutions, and the content of reducing sugars liberated from immersed RS was analyzed. Glucose, xylose, arabinose and sucrose were detected varying with the immersion type. In particular, 1% AA-immersion of RS for 72 hr was the most effective conditions to liberate glucose from RS. Secondly, the RS residues were used for elementary analysis and fabrication of fuel pellets. In addition to the solution type, concentration of immersion solutions (0%, 1%, 2%) and immersion time (24, 72, 120 hr) were used as experimental factors. The contents of nitrogen, sulfur and chlorine reduced effectively through the immersion of RS in DW, AA and OA solutions. For properties of RS-based pellets, bulk density and higher heating value of RS-based pellets greatly increased with the immersion of RS, and the qualities were much higher than those of the A-grade pellet of the EN standards. Ash content decreased remarkably through the immersion of RS, and was satisfied with the A-grade pellet standard. Durability was negatively affected by the immersion of RS, and did not reached to B-grade of the EN standard. In conclusion, acid immersion of RS can be a pretreatment method for the production of fuel pellet and bioethanol, but use of the immersed RS for the production of high-quality pellets might be restricted due to low durability of immersed-RS pellets. Therefore, further studies, such as investigation of detailed immersion conditions, fabrication of mixed pellets with wooden materials and addition of binders, are needed to resolve the problems. Key words -

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Extraction of Liberated Reducing Sugars from Rapeseed Cake via Acid and Alkali Treatments

Cited by 3 publications

References 26 publications

Identification and Determination of Phenolic Compounds in Rapeseed Meals (Brassica napus L.)

Identification and Determination of Phenolic Compounds in Rapeseed Meals (Brassica napus L.)

Simultaneous extraction of proteins and carbohydrates, including phenolics, antioxidants, and macamide B from Peruvian maca (Lepidium meyenii Walp.)

Separation of Reducing Sugars from Rape Stalk by Acid Hydrolysis and Fabrication of Fuel Pellets from its Residues

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