Pressure-based method for the extraction and characterisation of agar from Gelidium sesquipedale

L. P. Gomez Barrio; D. Pradhan; U. Tiwari; J. F. Curtin; A. K. Jaiswal; B. K. Tiwari; C. Álvarez Garcia

doi:10.1007/s10811-023-03076-y

Pressure-based method for the extraction and characterisation of agar from Gelidium sesquipedale

L. P. Gomez Barrio, D. Pradhan, U. Tiwari, J. F. Curtin, A. K. Jaiswal, B. K. Tiwari, C. Álvarez Garcia

Research output: Contribution to journal › Article › peer-review

Abstract

Agar has been widely used in the food, pharmaceutical and medical fieldsand has been traditionally extracted by soaking the macroalgae for up to 4 h at boiling temperatures. Traditional methods are often energy intensive and therefore extraction technologies are currently being investigated in order to pursue more sustainable form of extraction. This study focused on the extraction of agar from Gelidium sesquipedale by means a combination of an acid pre-treatment (citric or acetic acid) followed by autoclaving at different time/temperature combinations. It was found that among all the conditions tested (10, 15 and 20 min) and (100, 110, and 120 °C), the best condition was (20 min, 110 °C) by means of a citric acid pre-treatment, reporting a yield of 31.69 ± 3.5% (g extract per g dried G. sesquipedale), and a gel strength of 183.78 ± 36.80 g cm⁻².

Original language	English
Pages (from-to)	2473-2483
Number of pages	11
Journal	Journal of Applied Phycology
Volume	35
Issue number	5
DOIs	https://doi.org/10.1007/s10811-023-03076-y
Publication status	Published - Oct 2023

Keywords

Hydrocolloid
Novel
Polysaccharide
Rhodophyta
Sustainable

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title = "Pressure-based method for the extraction and characterisation of agar from Gelidium sesquipedale",

abstract = "Agar has been widely used in the food, pharmaceutical and medical fieldsand has been traditionally extracted by soaking the macroalgae for up to 4 h at boiling temperatures. Traditional methods are often energy intensive and therefore extraction technologies are currently being investigated in order to pursue more sustainable form of extraction. This study focused on the extraction of agar from Gelidium sesquipedale by means a combination of an acid pre-treatment (citric or acetic acid) followed by autoclaving at different time/temperature combinations. It was found that among all the conditions tested (10, 15 and 20 min) and (100, 110, and 120 °C), the best condition was (20 min, 110 °C) by means of a citric acid pre-treatment, reporting a yield of 31.69 ± 3.5% (g extract per g dried G. sesquipedale), and a gel strength of 183.78 ± 36.80 g cm−2.",

keywords = "Hydrocolloid, Novel, Polysaccharide, Rhodophyta, Sustainable",

author = "{Gomez Barrio}, {L. P.} and D. Pradhan and U. Tiwari and Curtin, {J. F.} and Jaiswal, {A. K.} and Tiwari, {B. K.} and {{\'A}lvarez Garcia}, C.",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s), under exclusive licence to Springer Nature B.V.",

year = "2023",

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doi = "10.1007/s10811-023-03076-y",

language = "English",

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AU - Gomez Barrio, L. P.

AU - Pradhan, D.

AU - Tiwari, U.

AU - Curtin, J. F.

AU - Jaiswal, A. K.

AU - Tiwari, B. K.

AU - Álvarez Garcia, C.

PY - 2023/10

Y1 - 2023/10

N2 - Agar has been widely used in the food, pharmaceutical and medical fieldsand has been traditionally extracted by soaking the macroalgae for up to 4 h at boiling temperatures. Traditional methods are often energy intensive and therefore extraction technologies are currently being investigated in order to pursue more sustainable form of extraction. This study focused on the extraction of agar from Gelidium sesquipedale by means a combination of an acid pre-treatment (citric or acetic acid) followed by autoclaving at different time/temperature combinations. It was found that among all the conditions tested (10, 15 and 20 min) and (100, 110, and 120 °C), the best condition was (20 min, 110 °C) by means of a citric acid pre-treatment, reporting a yield of 31.69 ± 3.5% (g extract per g dried G. sesquipedale), and a gel strength of 183.78 ± 36.80 g cm−2.

AB - Agar has been widely used in the food, pharmaceutical and medical fieldsand has been traditionally extracted by soaking the macroalgae for up to 4 h at boiling temperatures. Traditional methods are often energy intensive and therefore extraction technologies are currently being investigated in order to pursue more sustainable form of extraction. This study focused on the extraction of agar from Gelidium sesquipedale by means a combination of an acid pre-treatment (citric or acetic acid) followed by autoclaving at different time/temperature combinations. It was found that among all the conditions tested (10, 15 and 20 min) and (100, 110, and 120 °C), the best condition was (20 min, 110 °C) by means of a citric acid pre-treatment, reporting a yield of 31.69 ± 3.5% (g extract per g dried G. sesquipedale), and a gel strength of 183.78 ± 36.80 g cm−2.

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KW - Polysaccharide

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ER -

Pressure-based method for the extraction and characterisation of agar from Gelidium sesquipedale

Abstract

Keywords

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