Production of oligosaccharides from coconut meal by subcritical water treatment

Khuwijitjaru, Pramote; Pokpong, Areewan; Klinchongkon, Khwanjai; Adachi, Shuji

doi:10.1111/ijfs.12524

Cited by 38 publications

(28 citation statements)

References 18 publications

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“…Recently, we demonstrated that subcritical water is an effective method for hydrolyzing the carbohydrates in coconut meal, which contains mainly mannan polysaccharides, into mono‐ and oligosaccharides (Khuwijitjaru et al . , ). Some attempts have been made to extract pectin from various agricultural wastes using subcritical water (Ueno et al .…”

Section: Introductionmentioning

confidence: 99%

Extraction of Oligosaccharides from Passion Fruit Peel by Subcritical Water Treatment

Klinchongkon

Khuwijitjaru

Wiboonsirikul

et al. 2015

J Food Process Engineering

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Passion fruit peel, a major by‐product of the fruit processing, was treated in subcritical water under nonisothermal conditions in batch‐type reactor containing the dried peel and water in the ratio 1:16 (w/w), with maximum temperatures in the range of 100–245C. The effects of the treatment temperature and time on the composition of the obtained hydrolysates were combined and expressed as the severity factor (ln Ro). Both mono‐ and oligosaccharides with high degree of polymerizations (DP > 7) were extracted from the peel under every treatment tested. The treatment at ln Ro of 3.4 and 5.1, corresponding to the heating to 150C within 4.5 min and to 175C within 5.5 min, respectively, yielded the highest amount of oligosaccharides (ca. 21%) with galacturonan as a main component (ca. 65%), indicating that pectin was predominantly hydrolyzed and extracted under these conditions. The study showed that subcritical water treatment is an effective method for producing the oligosaccharides which may be useful as dietary fiber. Practical Applications Pectic oligosaccharide is a soluble dietary fiber that can be obtained by hydrolysis of pectin. This oligosaccharide can be classified as a prebiotic that possesses several health‐promoting functions. Utilizing the by‐product from passion fruit to produce pectic oligosaccharides is an alternative use for increasing the value of this bioresource.

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Section: Introductionmentioning

confidence: 99%

Extraction of Oligosaccharides from Passion Fruit Peel by Subcritical Water Treatment

Klinchongkon

Khuwijitjaru

Wiboonsirikul

et al. 2015

J Food Process Engineering

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“…[1][2][3] The extraction of phenolic compounds from agricultural materials is one of the applications of subcritical water. [4][5][6][7] Some advantages of subcritical water extraction over others conventional organic solvent extraction methods have been demonstrated in these studies, for example it is an environmentally friendly method and has a high efficiency for the extraction of phenolic compounds.…”

Section: Introductionmentioning

confidence: 99%

Degradation kinetics of some phenolic compounds in subcritical water and radical scavenging activity of their degradation products

et al. 2013

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The degradation of 10 phenolic compounds including 9 phenolic acids (caffeic, chlorogenic, p‐coumaric, gallic, gentisic, p‐hydroxybenzoic, protocatechuic, syringic and vanillic acids) and one flavanol (catechin) in subcritical water at the initial concentration of 100 mg/L was investigated in a temperature range of 100–250°C for 30–120 min in a batch‐type vessel. The degradation process followed the first‐order kinetics model. After treatment at 250°C for 30 min, all the compounds completely disappeared. We also demonstrated that the subcritical water treatment of some phenolic compounds, especially, caffeic acid, resulted in products that were quite stable at high temperature and exhibited a high DPPH radical scavenging activity, that is retaining about 50% of the DPPH radical scavenging activity compared to the original caffeic acid solution after the treatment at 250°C for 120 min.

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“…Monosaccharides and oligosaccharides can also be extracted using the SWE technique from palm oil fronds [38] and coconut plants [43]. Monosaccharide and oligosaccharides are produced by the decomposition of carbohydrates and can be used as a biofuel, food additive, or pharmaceutical products.…”

Section: Extraction Of Bioactive Compounds From Plantsmentioning

confidence: 99%

“…For palm oil, the highest monosaccharide content was successfully extracted using SWE at a temperature of 190°C with a treatment time of 10 min, while for coconut, the highest yield of mono-and oligosaccharides extracts was obtained at a temperature of 250°C for 10 min. The yield and ratio of saccharide components can also be manipulated by varying the proportion of raw materials to water used in the SWE process [43].…”

Section: Extraction Of Bioactive Compounds From Plantsmentioning

confidence: 99%

Subcritical Water Extraction of Bioactive Compounds from Plants and Algae: Applications in Pharmaceutical and Food Ingredients

2015

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Plants and algae are the main sources of natural bioactive compounds used in the food and pharmaceutical industries. It is very important to achieve an efficient and safe technique to recover bioactive compounds while maintaining their quality and properties. Subcritical water extraction is the most promising engineering approach that offers an environmentally friendly technique for extracting various compounds from plants and algae. Application of pressurized water and high temperature in subcritical phase is able to modify the dielectric constant and polarity of the solvent which then contributes to a better extraction process. The technique improves the mass transfer rate and preserves the biological potency of the extracts. This article reviews current studies on the extraction of bioactive compounds from various species of plants and algae using the subcritical water technique and discusses its effects and benefits for the food and pharmaceutical industries.

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Production of oligosaccharides from coconut meal by subcritical water treatment

Cited by 38 publications

References 18 publications

Extraction of Oligosaccharides from Passion Fruit Peel by Subcritical Water Treatment

Extraction of Oligosaccharides from Passion Fruit Peel by Subcritical Water Treatment

Degradation kinetics of some phenolic compounds in subcritical water and radical scavenging activity of their degradation products

Subcritical Water Extraction of Bioactive Compounds from Plants and Algae: Applications in Pharmaceutical and Food Ingredients

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