Species Composition, Distribution and Biomass of Seaweeds at Dung Quat Economic Zone, Quang Ngai Province, Vietnam

Ca, Vu Thanh; Hieu, Pham Van; Dinh, Mai Kien; Tien, Dam Duc

doi:10.15625/1859-3097/13/4/3542

TC KH&CN Biển

2013

DOI: 10.15625/1859-3097/13/4/3542

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Species Composition, Distribution and Biomass of Seaweeds at Dung Quat Economic Zone, Quang Ngai Province, Vietnam

Vu Thanh Ca

Pham Van Hieu

Mai Kien Dinh

et al.

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“…are dominant, accounting for up to 98% of total seaweed reserves and distributed widely in the sea of many provinces spanning from the south to the north, including Quang Nam-Da Nang, Quang Ngai, Khanh Hoa, Vung Tau, Hue, Kien Giang, Quang Ninh, Hai Phong, Thanh Hoa, and Nghe An. 6,38 S. swartzii (Turn.) C. Ag.…”

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Optimization of Microwave-Assisted Extraction of Phlorotannin From Sargassum swartzii (Turn.) C. Ag. With Ethanol/Water

Toàn

Phong

Tien

et al. 2021

Natural Product Communications

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Sargassum is a genus of brown macroalgae in the class Phaeophyta, distributed widely in all oceans, including those of Vietnam. Species of this genus have been proven to possess diverse biological activities, such as antioxidant, anti-fungal, and anti-inflammatory, along with many benefits and applications for human health, including anti-diabetic, obesity, and thrombosis. These benefits arise from a diverse chemical composition, with compounds such as fucoidan, mannitol, and especially phlorotannin—a group of phenolic derivatives found predominantly in brown algae. In this study, we evaluated and optimized the factors that affected the extraction process of phlorotannins from Sargassum swartzii (Turn.) C. Ag., a common species of brown macroalgae in Vietnam. The process utilized ethanol and water as the solvent system, and the extraction process was assisted with the use of microwaves. To carry out optimization studies, Response Surface Methodology (RSM) was adopted according to a Central Composite Desisgn (CCD), taking four processing factors into consideration, ethanol concentration (%, v/v), extraction time (minutes), solvent/material ratio (v/w), and microwave output power (W) as independent variables. Phlorotannin concentration (mgPhE/g) and extract mass (mg) were regarded as optimization outcomes. Experimental conditions that produced the highest phlorotannin yield from 10 g of S. swartzii are as follows: Extraction time of 65 minutes, ethanol concentration of 52%, microwave output power of 613 W, and solvent/material ratio of 33/1 (v/w). These conditions corresponded to a phlorotannin concentration of 5.59 ± 0.11 mg PhE/g, and a total extract content of 27.88 ± 0.13 mg/g.

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Optimization of Microwave-Assisted Extraction of Phlorotannin From Sargassum swartzii (Turn.) C. Ag. With Ethanol/Water

Toàn

Phong

Tien

et al. 2021

Natural Product Communications

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Species Composition, Distribution and Biomass of Seaweeds at Dung Quat Economic Zone, Quang Ngai Province, Vietnam

Cited by 1 publication

References 0 publications

Optimization of Microwave-Assisted Extraction of Phlorotannin From Sargassum swartzii (Turn.) C. Ag. With Ethanol/Water

Optimization of Microwave-Assisted Extraction of Phlorotannin From Sargassum swartzii (Turn.) C. Ag. With Ethanol/Water

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