A green approach for alginate extraction from Sargassum muticum brown seaweed using ultrasound-assisted technique

2019 ◽  
Vol 124 ◽  
pp. 451-459 ◽  
Author(s):  
N. Flórez-Fernández ◽  
H. Domínguez ◽  
M.D. Torres
Keyword(s):  
Brown Seaweed ◽  
Sargassum Muticum ◽  
Green Approach ◽  
Ultrasound Assisted ◽  
Alginate Extraction

scholarly journals On the Health Benefits vs. Risks of Seaweeds and Their Constituents: The Curious Case of the Polymer Paradigm

Marine Drugs ◽  
2021 ◽  
Vol 19 (3) ◽  
pp. 164
Author(s):  
João Cotas ◽  
Diana Pacheco ◽  
Glacio Souza Araujo ◽  
Ana Valado ◽  
Alan T. Critchley ◽  
...  
Keyword(s):  
Brown Seaweed ◽  
Dry Weight ◽  
Sargassum Muticum ◽  
Human Nutrition ◽  
Health Impacts ◽  
Gracilaria Gracilis ◽  
Red Seaweeds ◽  
Positive Effects ◽  
Negative Impacts ◽  
Biomedical Potential

To exploit the nutraceutical and biomedical potential of selected seaweed-derived polymers in an economically viable way, it is necessary to analyze and understand their quality and yield fluctuations throughout the seasons. In this study, the seasonal polysaccharide yield and respective quality were evaluated in three selected seaweeds, namely the agarophyte Gracilaria gracilis, the carrageenophyte Calliblepharis jubata (both red seaweeds) and the alginophyte Sargassum muticum (brown seaweed). It was found that the agar synthesis of G. gracilis did not significantly differ with the seasons (27.04% seaweed dry weight (DW)). In contrast, the carrageenan content in C. jubata varied seasonally, being synthesized in higher concentrations during the summer (18.73% DW). Meanwhile, the alginate synthesis of S. muticum exhibited a higher concentration (36.88% DW) during the winter. Therefore, there is a need to assess the threshold at which seaweed-derived polymers may have positive effects or negative impacts on human nutrition. Furthermore, this study highlights the three polymers, along with their known thresholds, at which they can have positive and/or negative health impacts. Such knowledge is key to recognizing the paradigm governing their successful deployment and related beneficial applications in humans.

scholarly journals Summer shifts of bacterial communities associated with the invasive brown seaweed Sargassum muticum are location and tissue dependent

PLoS ONE ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. e0206734 ◽  
Author(s):  
Alexandra Serebryakova ◽  
Tania Aires ◽  
Frédérique Viard ◽  
Ester A. Serrão ◽  
Aschwin H. Engelen
Keyword(s):  
Bacterial Communities ◽  
Brown Seaweed ◽  
Sargassum Muticum

scholarly journals Enhancing Methane Production from Spring-Harvested Sargassum muticum

2021 ◽  
pp. 117-123
Author(s):  
Supattra Maneein ◽  
John J. Milledge ◽  
Birthe V. Nielsen
Keyword(s):  
Anaerobic Digestion ◽  
Pharmaceutical Industry ◽  
Brown Seaweed ◽  
Sargassum Muticum ◽  
Biofuel Production ◽  
Biochemical Methane Potential ◽  
Seaweed Species ◽  
Invasive Seaweed ◽  
Methane Potential ◽  
Aqueous Meoh

AbstractSargassum muticum is a brown seaweed which is invasive to Europe and currently treated as waste. The use of S. muticum for biofuel production by anaerobic digestion (AD) is limited by low methane (CH4) yields. This study compares the biochemical methane potential (BMP) of S. muticum treated in three different approaches: aqueous methanol (70% MeOH) treated, washed, and untreated. Aqueous MeOH treatment of spring-harvested S. muticum was found to increase CH4 production potential by almost 50% relative to the untreated biomass. The MeOH treatment possibly extracts AD inhibitors which could be high-value compounds for use in the pharmaceutical industry, showing potential for the development of a biorefinery approach; ultimately exploiting this invasive seaweed species.

The resistance to dislodgement ofSargassum muticumgermlings under defined hydrodynamic conditions

1983 ◽  
Vol 63 (1) ◽  
pp. 181-193 ◽  
Author(s):  
Trevor A. Norton
Keyword(s):  
Water Flow ◽  
Brown Seaweed ◽  
Sargassum Muticum ◽  
Flowing Water ◽  
Hydrodynamic Conditions ◽  
Secure Attachment ◽  
Water Motion ◽  
The Mean ◽  
Flow Velocities

The attachment capabilities of a brown seaweed,Sargassum muticum(Yendo) Fensholt were investigated in the laboratory on both smooth and rough substrata and in surging water motion reaching flow velocities of 57 cm s and 90 cm s.Newly released zygotes have no means of adhesion until they develop rhizoids, which can adhere on contact with the substratum. Attachment tenacity, as measured by the germling's ability to withstand dislodgement at a given velocity of water flow, is slight at first, but increases with time. This is not simply a function of time spent in residence on the substratum, for germlings cultured suspension stick very quickly and tenaciously when allowed to settle. Tenacity of adhesion seems to be a reflexion of the amount of mucopolysaccharide adhesive present. This increases gradually during the first few days of the germling's life, regardless of whether it is attached or not.Once secure attachment is achieved it is not weakened even by the death of the germling. A film of bacteria and micro algae on the surface of the substratum is not a requirement for germling adhesion, but its presence enhances the tenacity of adhesion.Smooth substrata are the least favourable for germling survival in flowing water. On rough substrata the ‘peaks’ of the microtopography and surfaces facing into the current are much less favourable than the troughs between the ‘peaks’, or surfaces in the lee of ‘peaks’. Germling survival increases with increasing substratum roughness up to an optimum rugosity at which the mean depth of the depressions on the surface is 420 μm, and the vast majority are deeper than the height of the germlings.

scholarly journals Acid and calcium alginate extraction method affected the quality of alginate from brown seaweed Sargasum hystrix J. Agardh

2018 ◽  
Vol 21 (3) ◽  
pp. 532
Author(s):  
Ivana M. Diharningrum ◽  
Amir Husni
Keyword(s):  
Moisture Content ◽  
Sodium Alginate ◽  
Extraction Method ◽  
Calcium Alginate ◽  
Functional Group ◽  
Brown Seaweed ◽  
Extraction Methods ◽  
Ash Content ◽  
Alginate Extraction

Seaweed is one of the marine biological resources of Indonesia that has a high potential to produce alginate, however, the most appropiate method to extract the alginate of high quality is still unknown. This study was aimed to determine the effects of extraction methods on the quality of alginate from seaweed Sargassum hystrix and compared the extraction cost. Two extraction methods were used in this study including acidic and calcium method. The yield, moisture content, viscosity, pH, whiteness degree, functional group, ash content and extraction cost were evaluated. The viscosity and whiteness degree of sodium alginate from acidic method was 126.00±7.21 cPs and 75.27±0.58 cPs, respectively. Meanwhile the calcium method produced sodium alginate with viscosity 7.23±1.50 cPs and whiteness degree 68.95±0.18 cPs. The yield, moisture content, and ash content of alginate produced by acidic method were lower compare to that of produced by calcium method. Cost analysis showed the acidic method required higher cost. Nevertheless, these resultssuggest that acidic method produce alginate with better quality than the calcium method.

scholarly journals Concentration Optimization Na2CO3 Alginates From Turbinaria sp. As Raw Material Electrolite Polymer For DSSC

2021 ◽  
Vol 3 (1) ◽  
pp. 30-33
Author(s):  
Dinda Liyana ◽  
Nurhadini Nurhadini ◽  
Ristika Oktavia Asriza
Keyword(s):  
Moisture Content ◽  
Polymer Electrolyte ◽  
Brown Seaweed ◽  
Electrical Energy ◽  
Raw Material ◽  
Ftir Analysis ◽  
Optimum Conditions ◽  
Percentage Yield ◽  
Optimum Extraction ◽  
Alginate Extraction

Polymer electrolyte DSSC is one component of the application can convert solar energy into electrical energy. The polymer electrolyte can be synthesized from brown seaweed Turbinaria sp. However, the optimization of alginate extraction has not been widely carried out, so the aim of this study was to determine the optimum conditions for variations in the concentration of Na2CO3 (3%, 5%, 7%) in extracts from Turbinaria sp as raw material for polymer electrolyte synthesis for DSSC. Alginate optimum extraction results known by percentage yield, moisture content and functional groups using FTIR analysis. The optimum conditions for alginate extraction from Turbinaria sp are Na2CO3 5% and a temperature of 60 oC with a yield of 23.81% and a moisture content of 8.1%. FTIR results also indicate the intensity of the strongest mannuronic seen at 822cm-1 wave numbers.

scholarly journals Sonochemistry: Non-Classical Way of Synthesis

2019 ◽  
Vol 9 (6-s) ◽  
pp. 229-232
Author(s):  
Pintu Prajapati ◽  
Avani Sheth ◽  
Dhaval M Patel ◽  
Advaita Patel ◽  
Priti Mehta
Keyword(s):  
Chemical Synthesis ◽  
Chemical Reactions ◽  
Chemical Reaction ◽  
Driving Force ◽  
Current Knowledge ◽  
Theoretical Background ◽  
Green Approach ◽  
Ultrasound Assisted ◽  
Viable Approach ◽  
Detailed Picture

This review presents the detailed picture of current knowledge on ultrasound assisted chemical reactions and its green approach in chemical synthesis. This article illustrates the theoretical background and details about ultrasound, its mechanism (cavitation, the driving force) in chemical synthesis, types of reactions with different systems and its utility. All the reported applications have shown that Sonochemistry, ultrasound assisted chemical reaction is a green and economical viable approach for drug, impurity or chemical intermediate synthesis. Keywords: Cavitation, Sonocatalysis, Sonochemistry Ultrasound

Sign in / Sign up

Export Citation Format

Share Document