The optimization of oil extraction from macroalgae, Rhizoclonium sp. by chemical methods for efficient conversion into biodiesel

Saengsawang, Boonyawee; Bhuyar, Prakash; Manmai, Numchok; Ponnusamy, Vinoth Kumar; Ramaraj, Rameshprabu; Unpaprom, Yuwalee

doi:10.1016/j.fuel.2020.117841

Cited by 107 publications

(46 citation statements)

References 33 publications

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“…Bioactive compounds are defined as the secondary metabolites that can be isolated and purified from the microalgae, plant, microbes and other organisms that has ability in biological activities [7]. The production of bioactive compounds from microalgae can be beneficial in pharmaceutical industry [8,9]. Algae also contain several bioactive compounds that are beneficial as antimicrobial agent like terpenoids, steroid, phenolic compounds, alkenes and pholorotannins [10,11].…”

Section: Introductionmentioning

confidence: 99%

Exploration of bioactive compounds and antibacterial activity of marine blue-green microalgae (Oscillatoria sp.) isolated from coastal region of west Malaysia

et al. 2020

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Cyanobacteria is blue-green microalgae that produces a variety of secondary metabolites such as antibiotic, cytotoxic and antimicrobial agents. Present investigation proposed to study an extraction of active agents from Cyanobacteria and its antibacterial activity. The Cyanobacteria were collected, and isolated colony was found to be Oscillatoria sp. and it was grown in BG 11 medium for mass cultivation. Then the centrifuged biomass was weighed and used for extraction of bioactive compounds. GCMS analysis from Oscillatoria sp. determines fatty acid, triazine derivatives, pyridine derivatives, acridine derivatives. The result revealed that Oscillatoria sp. can play crucial roles as antibacterial agents because the methanolic extract are inhibiting the growth of S. aureus for gram-positive whereas P. aeruginosa for gram-negative bacteria. The crude extract was effective against S. aureus with the highest concentration, 100 mg/ml where area of the zone was 14.10 ± 0.8 mm. The crude extract actively inhibited P. aeruginosa at 75 and 100 mg/ml with highest area of inhibition were in the average of 13.23 ± 0.1 and 15.43 ± 0.2 mm. Finally, the antimicrobial activity was carried out by disc diffusion method with different concentrations of active compounds shows the MIC value in gram-positive bacteria was 30 µg/ml whereas for gram-negative bacteria was 25 µg/ml. Cyanobacteria extract should be preferred and considered to be new natural drug or antibiotics in pharmaceutical and health care industry. This coastal region should be studied further by researchers to study more information and benefits in the future.

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Section: Introductionmentioning

confidence: 99%

Exploration of bioactive compounds and antibacterial activity of marine blue-green microalgae (Oscillatoria sp.) isolated from coastal region of west Malaysia

et al. 2020

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“…A calibration curve was generated with Rutin as the reference compound, and the results were expressed as grams of Rutin equivalents per 100 g of dry extract. The results were expressed in milligrams of Rutin equivalents per gram of extract (Huang et al., 2011; Saengsawang et al., 2020).…”

Section: Methodsmentioning

confidence: 99%

Antibacterial and antioxidative activity of the essential oil and seed extracts of Artocarpus heterophyllus for effective shelf‐life enhancement of stored meat

Ramli

Badrulzaman

Hamid

et al. 2020

J Food Process Preserv

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This study was designed to examine the in vitro antimicrobial and antioxidant activity of the essential oil and various extracts processed from Jackfruit seed (Artocarpus heterophyllus). Seed extracts obtained from Jackfruit were tested for TPC and TFC, and the TPC of 34.48 ± 1.77 mg GAE/g extract was detected while TFC of 0.19 ± 0.004 mg QE/g extract was found significantly. Phytochemical screening of A. heterophyllus seed extracts using UPLC–QTOF/MS revealed the presence of eight compounds, representing (−)‐Epiafzelechin‐3‐O‐(6″‐O‐acetyl)‐β‐D‐allosepyranoside was the most abundant phenolic compound. Further samples were also subjected to a screening for their possible antioxidant activity using 2,2‐diphenyl‐1‐picrylhydrazyl assay. DPPH analysis revealed that seed extract of A. heterophyllus has satisfactory radical scavenging capacity which could scavenge the free radicals produced during oxidation process in meat. The antioxidant activity can be observed for meat treated with seed extract as the TBA value was decreased in the samples on the addition of seed extract. However, in this study, seed extract treatment exhibited significant increase in MetMb content at 2 and 3 days of storage than in the control. The significance for all comparisons was determined at the p < .05 level. This result indicated that Jackfruit extract can be used commercially for meat shelf‐life management. Practical applications Jackfruit seed extract is a natural preservative which improves the shelf‐life storage of meat without causing any adverse effects. Natural preservative from plant source always better option when compare with chemical preservative. Jackfruit seed extracts could be used for shelf‐life enhancement of stored meat in natural condition without affecting the quality as well as the taste of meat.

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“…Each isolate in the colonies was labeled and picture was snapped at magnification of 100X. The two different microalgae were morphologically identified based on the manual 'Microalgae Identification for Aquaculture' (Bhuyar et al, 2020a;and Saengsawang et al, 2020). The identification was based on their morphology, color, shape and physical characteristic of microalgae.…”

Section: Identification and Screening Microalgaementioning

confidence: 99%

Removal of nitrogen and phosphorus from agro-industrial wastewater by using microalgae collected from coastal region of peninsular Malaysia

Bhuyar¹,

Farez²,

Hasbi³

et al. 2021

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The potential of microalgae as a source of renewable energy based on wastewater has received increasing interest worldwide in recent decades. A freshwater microalga Chlorella vulgaris was investigated for its ability to remove both nitrogen and phosphorus from three industrial wastewaters which were diluted in microalgae in two different proportions (namely, 50% and 75%). C. vulgaris grew fastest under 75% palm oil mill, and showed an maximum cell density (0.408 ± 0.012 g/L) for Palm Oil Mill Effluent (POME) wastewater, followed by riboflavin manufacturing wastewater (0.402 ± 0.083 g/L), and fertilizer industrial wastewater (0.320 ± 0.074 g/L), indicating the levels of nitrogen and phosphorus greatly influenced algal growth. Low removal efficiency for total nitrogen (TN) (11.35 ± 0.07% -51.31 ± 0.03%) and total phosphorus (TP) (31.25 ± 0.24% -93.62 ± 0.16%) was observed. C. vulgaris grew well when TP concentration was very low, indicating that this might be not the limiting factor to algal growth. The results suggest the potential of removing nutrient from wastewater by microalgae cultivation as production feedstock.

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The optimization of oil extraction from macroalgae, Rhizoclonium sp. by chemical methods for efficient conversion into biodiesel

Cited by 107 publications

References 33 publications

Exploration of bioactive compounds and antibacterial activity of marine blue-green microalgae (Oscillatoria sp.) isolated from coastal region of west Malaysia

Exploration of bioactive compounds and antibacterial activity of marine blue-green microalgae (Oscillatoria sp.) isolated from coastal region of west Malaysia

Antibacterial and antioxidative activity of the essential oil and seed extracts of Artocarpus heterophyllus for effective shelf‐life enhancement of stored meat

Removal of nitrogen and phosphorus from agro-industrial wastewater by using microalgae collected from coastal region of peninsular Malaysia

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