Publications by authors named "In-Yung Sunwoo"

Article Synopsis
  • * The study found that red algae had the highest ethanol yield, followed by brown and green algae, due to their carbohydrate content.
  • * The leftover biomass showed significant antioxidant activity, suggesting that these by-products can be used to create sustainable and valuable products in biorefineries.
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Article Synopsis
  • * The team optimized conditions for extracting peptone from cutlassfish head muscle, achieving a nitrogen content indicative of effective breakdown and confirming its ability to support microbial growth comparable to and even better than commercial alternatives.
  • * Test results showed that peptone from cutlassfish heads led to significantly higher expression levels of specific proteins in E. coli, highlighting its potential for biotechnological applications while promoting sustainable waste management in the fish processing sector.
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and are types of brown algae used for their nutritional value and medicinal properties, including anti-inflammatory, antioxidant, and anticancer effects. Despite their importance in various industries, many seaweed byproducts containing dietary fiber and polysaccharides are discarded in landfills. These byproducts can be recycled and repurposed for different applications.

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Microalgae have gained attention as a promising source of chlorophylls and carotenoids in various industries. However, scaling up of conventional bubble columns presents challenges related to cell sedimentation and the presence of non-photosynthetic cells due to non-circulating zones and decreased light accessibility, respectively. Therefore, this study aimed to evaluate the newly developed continuously circulated bioreactor ROSEMAX at both laboratory and pilot scales, compared to a conventional bubble column.

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Eucheuma denticulatum is a red macroalgae with a high carbohydrate content. The fermentable sugars from E. denticulatum were obtained through sequential thermal acid hydrolysis, enzymatic saccharification, and detoxification.

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Glucose and galactose are monosaccharides obtained from Gloiopeltis furcata (Red algae). A total monosaccharide yield of 62.3 g/L was obtained from G.

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This study was aimed at enhancing galactose consumption from the red seaweed Kappaphycus alvarezii. The optimal pretreatment condition of thermal acid hydrolysis was treated with 350 mM HNO for 60 min at 121 °C. The enzymatic saccharification with a 1:1 mixture of Celluclast 1.

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A total 42.68 g/L monosaccharide with 0.10 g/L HMF was obtained from 10% (w/v) Kappaphycus alvarezii with thermal acid hydrolysis using 350 mM HNO at 121 °C for 60 min and enzymatic saccharification with a 1:1 mixture of Viscozyme L and Celluclast 1.

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The red seaweed has been used for the production of bioethanol. Pretreatment for monosaccharide production was carried out with 12% (w/v) slurry and 500 mM HNO at 121°C for 90 min. Enzymatic hydrolysis was performed with a mixture of commercial enzymes (Cellic C-Tec 2 and Celluclast 1.

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In this study, Pavlova lutheri, Chlorella vulgaris, and Porphyridium cruentum were cultured using modified F/2 media in a 1 L flask culture. Various nitrate concentrations were tested to determine an optimal nitrate concentration for algal growth. Subsequently, the effect of light emitted at a specific wavelength on biomass and lipid production by three microalgae was evaluated using various wavelengths of light-emitting diodes (LED).

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Water hyacinth (Eichhornia crassipes) was used as a feedstock for ethanol production. The optimal hyper-thermal (HT) acid hydrolysis conditions were 8% (w/v) slurry content, 200 mM HSO, at 160 °C for 20 min and enzymatic saccharification for 48 h using an enzyme mixture of 20 units/mL Viscozyme L and Cellic C Tec2. After pretreatment, 48.

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A total monosaccharide concentration of 47.0 g/L from 12% (w/v) Gracilaria verrucosa was obtained by hyper thermal acid hydrolysis with 0.2 M HCl at 140°C for 15 min and enzymatic saccharification with CTec2.

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In this study, Ascophyllum nodosum was studied as a biomass for ethanol production. A. nodosum was degraded to monosaccharide by hyper-thermal (HT) acid hydrolysis and enzymatic saccharification and analyzed using response surface methodology (RSM) and the Michaelis-Menten equation.

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The optimal light intensity and photoperiod required to produce high biomass and lipid contents in Isochrysis galbana cultured in a 14-L bioreactor with LED wavelengths was studied. The cell biomass production was monitored in the first phase comprising of mixed blue (465 nm) and red (640 nm) LED wavelengths, then green (520 nm) LED were used in the second phase for lipid production. The optimal light intensity was 400 µmol/m/s giving a maximum cell biomass of 1.

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Ethanol ferrmentation of Kappaphycus alvarezii hydrolysates was performed using wild-type (WT) Saccharomyces cerevisiae CEN.PK2-1, hexokinase 2 deleted (Δhxk2) and adapted strain on high galactose concentrations. The WT and Δhxk2 strains produced 8.

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Optimal conditions of hyper thermal (HT) acid hydrolysis of the Saccharina japonica was determined to a seaweed slurry content of 12% (w/v) and 144 mM HSO at 160 °C for 10 min. Enzymatic saccharification was carried out at 50 °C and 150 rpm for 48 h using the three enzymes at concentrations of 16 U/mL. Celluclast 1.

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In this study, bioethanol was produced from the seaweed Gelidium amansii as biomass through separate hydrolysis and fermentation (SHF) processes. The SHF processes examined in this study include thermal acid hydrolysis pretreatment, enzymatic saccharification, detoxification, and fermentation. Thermal acid hydrolysis pretreatment was conducted using HSO, with a slurry content of 8-16% and treatment time of 15-75 min.

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Acetone, butanol, and ethanol (ABE) were produced following the separate hydrolysis and fermentation (SHF) method using polysaccharides from the green macroalgae Enteromorpha intestinalis as biomass. We focused on the optimization of enzymatic saccharification as pretreatments for the fermentation of E. intestinalis.

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A three-phase culture system combining blue (465 nm) light-emitting diode (LED) wavelength as the first phase, green (550 nm) as the second phase, and temperature stress as the third phase was applied to a Nannochloropsis oceanica culture in 14-L photobioreactors. Microalgal growth promotion parameters were optimized in the first phase, followed by green LED stress for lipid production in the second phase. Maximum biomass and lipid production values of 0.

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Gracilaria verrucosa, red seaweed, is a promising biomass for bioethanol production due to its high carbohydrate content. The optimal hyper thermal (HT) acid hydrolysis conditions are 12% (w/v) G. verrucosa with 0.

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This study employed a statistical method to obtain optimal hyper thermal acid hydrolysis conditions using Gelidium amansii (red seaweed) as a source of biomass. The optimal hyper thermal acid hydrolysis using G. amansii as biomass was determined as 12% (w/v) slurry content, 358.

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The optimal conditions for acetone-butanol-ethanol (ABE) production were evaluated using waste seaweed from Gwangalli Beach, Busan, Korea. The waste seaweed had a fiber and carbohydrate, content of 48.34%; these are the main resources for ABE production.

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The waste seaweed from Gwangalli beach, Busan, Korea was utilized as biomass for ethanol production. (brown seaweed, Mojaban in Korean name) comprised 72% of the biomass. The optimal hyper thermal acid hydrolysis conditions were obtained as 8% slurry contents, 138 mM sulfuric acid, and 160°C of treatment temperature for 10 min with a low content of inhibitory compounds.

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Bioethanol was produced using polysaccharide from soybean residue as biomass by separate hydrolysis and fermentation (SHF). This study focused on pretreatment, enzyme saccharification, and fermentation. Pretreatment to obtain monosaccharide was carried out with 20% (w/v) soybean residue slurry and 270 mmol/L HSO at 121 °C for 60 min.

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