Article
Polymer Science
Fernando Elias Guckert, Claudia Sayer, Debora de Oliveira, Pedro H. Hermes de Araujo, Bruno Francisco Oechsler
Summary: This work investigates the lipase-catalyzed bulk polycondensation of diethyl succinate and 1,4-butanediol to produce polybutylene succinate (PBS). The study evaluates the molar mass distribution of PBS and the recovery of the biocatalyst for reuse cycles. The results show promising enzymatic polycondensation reactions with good catalytic activity.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jeongbae Seo, Minguk Shin, Jonghwa Lee, Taek Lee, Jong-Min Oh, Chulhwan Park
Summary: The study focuses on valorizing formic acid and hexanol into hexyl formate through lipase-catalyzed esterification, achieving a maximum conversion rate of 98.28%. The optimized conditions include the use of Novozym 435 at a concentration of 15 g/L, a molar ratio of formic acid to hexanol of 1:5, and a reaction temperature of 40 degrees C. This approach can be a promising strategy for efficiently converting waste C1 gases into short-chain flavored esters.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Agriculture, Dairy & Animal Science
Larissa S. Gheller, Lucas G. Ghizzi, Caio S. Takiya, Nathalia T. S. Grigoletto, Tassia B. P. Silva, Julia A. Marques, Mauro S. S. Dias, Gustavo Freu, Francisco P. Renno
Summary: This study evaluated the effects of different organic acid treatments on whole-plant corn silage in terms of dry matter recovery, fermentation, chemical composition, and aerobic stability. Organic acid treatments led to increased dry matter recovery and decreased lactic acid content, while improving aerobic stability. Among the different organic acids tested, propionic acid treatments showed greater dry matter recovery and changes in silage composition compared to formic acid treatments.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2021)
Review
Chemistry, Physical
Adeel Mehmood, Sang Youn Chae, Eun Duck Park
Summary: This review discusses the eco-friendly method of PEC methane conversion and the unclear mechanism, summarizes various catalytic materials and their roles, proposes promising semiconductor materials, and discusses the design pathways for PEC methane conversion systems.
Article
Biochemistry & Molecular Biology
Otavio Domingues, Daniela Remonatto, Leticia Karen dos Santos, Julian Paul Martinez Galan, Danilo Luiz Flumignan, Ariela Veloso de Paula
Summary: This study successfully prepared functionalized maghemite nanoparticles for immobilization of Candida rugosa lipase (CRL) and evaluated its potential in the hydrolysis of waste cooking oil (WCO) and biodiesel production. The immobilized derivative showed high catalytic activity, and after immobilization, the nanoparticles became more dispersed, which is advantageous for catalytic reactions.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Sara Mirzakhani, Ben Hang Yin, Majid Masteri-Farahani, Alex C. K. Yip
Summary: Utilizing renewable energy to hydrogenate carbon dioxide into fuels eliminate massive CO2 emissions from the atmosphere and diminishes our need for using fossil fuels. Recent developments in designing heterogeneous catalysts for CO2 hydrogenation to formate, methanol, and C2+ hydrocarbons are reviewed, highlighting the importance of active metals, supports, and promoters. Nanostructured catalysts, such as ultra-small nanoparticles and nanoclusters, show promise in providing highly active and cost-effective catalysts. Direct synthesis of C2+ products through CO2 hydrogenation is also explored, with zeolites being used to overcome limitations in producing heavy hydrocarbons.
Article
Chemistry, Multidisciplinary
Shengjie Hao, Meiyu Cong, Hanwen Xu, Xin Ding, Yan Gao
Summary: The coupling of CO2RR and MOR can achieve efficient co-production of formate. Bi/Bi2O3 and Ni & horbar;Bi(OH)(3) catalysts, synthesized via oxygen vacancies engineering and heteroatom doping, respectively, exhibit high electrocatalytic activity for CO2RR and MOR reactions. The experimental results show that these catalysts have high product selectivity and electrocatalytic performance in a wide potential range.
Article
Chemistry, Multidisciplinary
Oliver Y. Gutierrez, Katarzyna Grubel, Jotheeswari Kothandaraman, Juan A. Lopez-Ruiz, Kriston P. Brooks, Mark E. Bowden, Tom Autrey
Summary: Using hydrogen to store energy is crucial for achieving sustainability and addressing climate change. Liquid hydrogen carriers can overcome the challenges of handling molecular hydrogen. The bicarbonate-formate cycle, utilizing formate ions as hydrogen and energy carriers, offers a promising solution. This system combines electrochemical and thermochemical operations and has the potential for CO2 capture and energy storage.
Article
Agriculture, Multidisciplinary
Wenyi Chen, Li Xu, Nanjing Zhong
Summary: Enzymatic esterification using CALB encapsulated into nucleotide-hybrid metal coordination polymers showed high selectivity for esterification in deacidification of high-acid oils. CALB@GMP/Tb demonstrated over 98% efficiency in converting oleic acid to glycerides during the deacidification process.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Review
Biotechnology & Applied Microbiology
Marcin Kublicki, Dominik Koszelewski, Anna Brodzka, Ryszard Ostaszewski
Summary: In recent years, wheat germ lipase (WGL) has attracted significant interest due to its various applications including fats and oils modification, esterification reactions in organic media, chiral racemic intermediate resolution, and carbon-carbon bond formation catalysis. Despite the lack of a published crystallographic structure, new catalytic activities of WGL are constantly being discovered, highlighting its catalytic potential.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Dan Wu, Jie Hao, Zhongxin Song, Xian-Zhu Fu, Jing-Li Luo
Summary: This study introduces a novel strategy of simultaneous formate generation at the cathode and anode to reduce electricity consumption and increase valuable fuel production. The integration system significantly lowers specific energy consumption for CO2R by 57.3% and for MOR by 71.2%, highlighting the economic benefits of coupling CO2R with alternative oxidation reactions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Kevin Fernandez-Caso, Ailen Pena-Rodriquez, Jose Solla-Gullon, Vicente Montiel, Guillermo Diaz-Sainz, Manuel Alvarez-Guerra, Angel Irabien
Summary: CO2 electroreduction is a promising way to reduce CO2 emissions and produce valuable products. This study explores the coupling of CO2 electroreduction to formate with glycerol electrooxidation to high-added value products. The results show significant progress in both cathodic formate production and anodic dihydroxyacetone production.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Applied
Subodh Uttamrao, Shubham Avinash, Shital Haribhau Barange, Pundlik Rambhau. Bhagat
Summary: This study investigated the photocatalytic esterification of levulinic acid to various levulinates and glycerides using a porphyrin-based photocatalyst. The influence of different reaction conditions on the model reaction was examined, and it was found that optimal yields of alkyl levulinates (76%) and glycerides (81%) could be achieved under visible light irradiation. Furthermore, the porphyrin photocatalyst was also effective for the etherification of biomass-derived glycerol with alcohols (methanol/ethanol) (88%) under ambient conditions. These results highlight the importance of porphyrin as a highly reactive, steady, and reusable heterogeneous photocatalyst.
Article
Biochemistry & Molecular Biology
Gleydison Amarante Soares, Robson Carlos Alnoch, Glauco Silva Dias, Nadabe dos Santos Reis, Iasnaia Maria de Carvalho Tavares, Hector A. Ruiz, Muhammad Bilal, Julieta Rangel de Oliveira, Nadia Krieger, Marcelo Franco
Summary: The study investigated the production and direct employment of a fermented solid containing lipases by Penicillium roqueforti ATCC 10110 in the ethyl-oleate synthesis. The optimized conditions led to higher lipase activity and stability in organic solvents, showing promising results for biocatalytic processes.
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Aby Cheruvathoor Poulose, Miroslav Medved, Vasudeva Rao Bakuru, Akashdeep Sharma, Deepika Singh, Suresh Babu Kalidindi, Hugo Bares, Michal Otyepka, Kolleboyina Jayaramulu, Aristides Bakandritsos, Radek Zboril
Summary: This study presents a reusable graphene catalyst that can convert glycerol, produced from biomass fermentation, to high-value chemicals at room temperature without solvents. The catalyst shows excellent activity and selectivity for glycerol conversion to solketal, and it can also convert oils to biodiesel.
NATURE COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Choe Earn Choong, Kien Tiek Wong, So Yeon Yoon, Heeyeon Kim, Mincheol Shin, Yoon-Young Chang, Jae-kyu Yang, Sang-Hyoun Kim, Byong-Hun Jeon, Yeomin Yoon, Min Jang
Summary: This study applied a partially water-soluble solvent (EAEW) for remediating complexly contaminated soils by TPH, HMs, and BaP, with optimized conditions and high removal efficiencies demonstrated in laboratory tests and pilot-scale system. The addition of HCl to the EAEW solvent was crucial for highly removing multi-pollutants, and the solvent could be regenerated and reused for multiple cycles. The EAEW solvent, with proven effectiveness, high recovery, and environmental friendly property, showed a high potential for feasible on-site application for multi-polluted soil remediation.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Agronomy
Haeun Kim, Jemin Son, Jonghwa Lee, Hah Young Yoo, Taek Lee, Min Jang, Jong-Min Oh, Chulhwan Park
Summary: The unique nanostructure of bacterial cellulose (BC) allows for diverse applications but the high production cost necessitates more cost-effective solutions. Various compounds produced during pretreatment may interfere with BC production. Low concentrations of aliphatic acids enhance BC production, while high concentrations suppress it. Miscanthus, barley straw, and pine tree hydrolysates show potential for efficient BC production under optimal conditions.
GLOBAL CHANGE BIOLOGY BIOENERGY
(2021)
Article
Environmental Sciences
Jemin Son, Kang Hyun Lee, Taek Lee, Hyun Soo Kim, Weon Ho Shin, Jong-Min Oh, Sang-Mo Koo, Byung Jo Yu, Hah Young Yoo, Chulhwan Park
Summary: Biorefineries have gained attention as an alternative to the petroleum industry for achieving sustainable development and reducing carbon emissions. This study focused on improving the production of bacterial cellulose (BC) from lignocellulose and optimizing the culture conditions. The results showed that BC production can be enhanced using statistical optimization of culture parameters, and lignocellulose can be a potential feedstock for BC production processes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Biochemistry & Molecular Biology
Jonghwa Lee, Kyeonga Kim, Jemin Son, Hyeseon Lee, Jin Han Song, Taek Lee, Heungbae Jeon, Hyun Soo Kim, Si Jae Park, Hah Young Yoo, Chulhwan Park
Summary: In this study, naringin oleate was synthesized through enzymatic esterification with optimized reaction conditions, resulting in a high conversion rate. This study presents an efficient method for synthesis that ensures high conversion within a shorter reaction time compared to previous methods.
Article
Chemistry, Medicinal
Kang Hyun Lee, Youngsang Chun, Ja Hyun Lee, Chulhwan Park, Hah Young Yoo, Ho Seok Kwak
Summary: This study presents an effective screening strategy using the negative phototaxis of Haematococcus pluvialis to obtain mutants with high astaxanthin production. A microfluidic device based on polydimethylsiloxane (PDMS) was developed to efficiently evaluate the phototactic response of H. pluvialis. Mutants sensitive to blue light were selected from a random mutant library based on their photosensitivity. The M1 strain obtained from this screening showed improved growth rate and astaxanthin production in a photo-bioreactor compared to the wild type.
Article
Environmental Sciences
Yesol Baek, Seungmee Lee, Jemin Son, Taek Lee, Jong-Min Oh, Sang Hun Lee, Hyun Uk Kim, Sang Woo Seo, Si Jae Park, Hah Young Yoo, Chulhwan Park
Summary: Naringin, a natural antioxidant found in citrus flavonoids, has limited bioavailability due to its low stability and solubility. However, recent reports have shown that acylation can improve the physical and chemical properties of naringin esters. This study aimed to enhance the conversion of naringin acetate using enzymatic reactions. By optimizing various factors, such as enzyme type, concentration, acyl donor, reaction temperature, and solvent, a high conversion rate of naringin acetate was achieved within a short time, demonstrating the commercial potential of this process.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Physical
Da-Eun Hyun, Jwa-Bin Jeon, Yeon-Sook Lee, Yong-Nam Kim, Minkyung Kim, Seunghoon Ko, Sang-Mo Koo, Weon Ho Shin, Chulhwan Park, Dong-Won Lee, Jong-Min Oh
Summary: This study successfully fabricated a large-area mullite-cordierite composite substrate for use in probe cards and investigated the effects of composition ratio and sintering temperature on its performance. The results showed that a combination of 70% mullite and 30% cordierite sintered at 1350℃ performed exceptionally well.
Article
Chemistry, Analytical
Dong Sup Kim, Xiaoguang Yang, Ja Hyun Lee, Hah Young Yoo, Chulhwan Park, Seung Wook Kim, Jinyoung Lee
Summary: Electrochemical nano-biosensors are widely used in various industries for qualitative and quantitative analyses due to their high sensitivity. This study focused on finding stable and efficient materials for real-time detection. The composite of graphite oxide/cobalt/chitosan was found to have excellent stability and electron transfer capability, and was applied in a bio-electrochemical nano-biosensor. The developed sensor successfully detected D-glucose in real-time over a wide range of concentrations, and maintained stable detection response even after 14 days.
Article
Engineering, Chemical
Kyung Won Lee, Jin Ku Cho, Chulhwan Park, Baek-Jin Kim
Summary: A hybrid synthesis system was designed to convert glucose to 1,6-diacetylfructose (DAF) using glucose-isomerase and immobilized lipase, followed by the direct dehydration of DAF to 5-acetoxymethyl-2-furfural (AMF) using a cation exchange resin and various industrial solvents. It was found that the addition of dioxane as a solvent dramatically improved the formation of AMF and 5-hydroxymethyl-2-furfural (HMF).
Review
Chemistry, Analytical
Myoungro Lee, Jinmyeong Kim, Moonbong Jang, Chulhwan Park, Jin-Ho Lee, Taek Lee
Summary: Exosomes have gained attention as potential biomarkers for early cancer diagnosis and have advantages over current tissue biopsies. However, accurate quantification methods for exosome concentration still need to be determined through further clinical trials. Recent developments in nanomaterial and biomaterial hybrid-based biosensors have shown promise in improving the sensitivity and selectivity for detecting exosomal biomarkers.
Article
Polymer Science
Jaemin Jo, So-Yeon Jeong, Junhyeok Lee, Chulhwan Park, Bonwook Koo
Summary: Polyhydroxyalkanoate (PHA) is a suitable base polymer for eco-friendly and biodegradable adhesives. Surface-modified cellulose nanofibers (CNFs) can enhance the flowability and infiltration ability of PHA-based adhesives, improving their performance on rough surfaces.
Article
Engineering, Chemical
Seunghee Kim, Hyerim Son, So Young Pang, Jin Ju Yang, Jeongho Lee, Kang Hyun Lee, Ja Hyun Lee, Chulhwan Park, Hah Young Yoo
Summary: In this study, the extraction conditions for anthocyanins from elderberry were optimized. Ethanol was found to be the most suitable solvent for maximal anthocyanin recovery. The optimal extraction conditions were determined to be 20.0 degrees C, 15.0 min, and 40.9% ethanol, resulting in a total anthocyanin content of 21.0 mg/g-biomass. Additionally, the elderberry extract was found to contain 67.4 mg/g-biomass of total phenols and 43.8 mg/g-biomass of flavonoids.
Article
Agronomy
Sungbong Kim, Hyeong Ryeol Kim, Hyun Ju Oh, Kyu-Tae Lee, Youngsoon Um, Dong Wook Kim, Sang Woo Seo, Chulhwan Park, Seung Wook Kim
Summary: Xylose-rich undefined broth extracted from barley straw pretreatment wastes was used as a resourceful media for Acremonium chrysogenum M35 culture and cephalosporin C (CPC) production. The most effective conditions for cell growth and CPC production were achieved with 6% xylose and 2% glycerol, resulting in a maximum CPC production of 9.07 g/L after 6 days. Investigation of cysteine synthesis pathways explained the enhanced CPC production in the undefined media.
GLOBAL CHANGE BIOLOGY BIOENERGY
(2023)
Article
Chemistry, Physical
Moonbong Jang, Myoungro Lee, Hiesang Sohn, Chulhwan Park, Taek Lee
Summary: We developed a rapid electrical biosensor for detecting Zika virus infection using a truncated DNA aptamer and alternating current electrothermal flow technique. The biosensor showed a linear increase in waveform as the concentration of Zika envelope in the serum increased, with a detection limit of 90.1 pM.
Review
Chemistry, Analytical
Yein Kwon, Yejin Yoon, Moonbong Jang, Sunggu Kang, Chulhwan Park, Taek Lee
Summary: Cylindrospermopsin (CYN) is a freshwater algal toxin that is produced during the proliferation of harmful cyanobacterial algal blooms. The effects of global warming have contributed to the worldwide occurrence of cyano-HABs, leading to increased damage to aquatic ecosystems. CYN exhibits cell toxicity, as well as toxicity to the skin, genes, liver, and other organs. Current methods for CYN detection have limitations, and recent studies have focused on biosensor-based technologies for improved detection.