https://scholar.korea.ac.kr/handle/2021.sw.korea/384 Wed, 08 Apr 2026 13:45:10 GMT 2026-04-08T13:45:10Z https://scholar.korea.ac.kr/handle/2021.sw.korea/270790 Title: Direct air capture-assisted sustainable fuel solution in maritime sector: a carbon footprint perspective Authors: Li, Shuangjun; Du, Zhenyu; Wang, Junyao; Wang, Hao; Cao, Xiangkun Elvis; Chen, Runkai; Pang, Yujia; Deng, Shuai; Mašek, Ondřej; Yuan, Xiangzhou; Lee, Ki Bong Abstract: Carbon emissions reduction within the maritime sector is pivotal for realizing zero-carbon goals and mitigating climate impacts. Adopting renewable carbon fuels presents a potent strategy. It is necessary to have a comprehensive understanding of its negative carbon attributes and enduring contributions to future development based on carbon footprint assessment. By using the CO2 captured through direct air capture (DAC) technology and the H2 obtained via water electrolysis as feedstock, electro-methanol (e-methanol) can be produced under renewable energy-driven conditions. Owing to the environmental benefits and economic feasibility of e-methanol, we highlight its potential as a practical alternative to traditional fossil fuel-based technical scenarios. A quantitative analysis of this integrated system from a carbon footprint perspective allows for an environmental sustainability assessment. According to predictions, scaled-up usage of the system can reduce the maritime sector's contribution to global carbon emissions by half by 2050. © The Author(s) 2025. Mon, 01 Dec 2025 00:00:00 GMT https://scholar.korea.ac.kr/handle/2021.sw.korea/270790 2025-12-01T00:00:00Z https://scholar.korea.ac.kr/handle/2021.sw.korea/270773 Title: Exploring the effects of biomolecular additive on performance of aqueous zinc metal batteries Authors: Lee, Sungmin; Huh, Sung-Ho; Lee, Young-Hoon; Kim, So Hee; Bae, Jong-Seong; Ahn, Kwang-Soon; Huh, June; Sung, Yung-Eun; Yu, Seung-Ho Abstract: Aqueous zinc metal batteries, as a post-lithium-ion technology, exhibit exceptional performance due to their nonflammability, high theoretical anode capacity (820 mAh g−1), and low redox potential (−0.762 V vs. the standard hydrogen electrode (SHE)). However, the stability of the zinc metal anode is compromised by several issues arising from the reduction of H2O, including hydrogen generation, byproduct accumulation, and zinc dendrite formation. Herein, the low concentration of caffeine electrolyte additive is introduced to 1 M ZnSO4 aqueous electrolyte. Despite the small quantity of additives, caffeine molecules adsorb onto the zinc metal anode, forming an unreactive layer that passivates the contact with reactive water molecules. Operando optical and X-ray imaging confirm that the caffeine passivation layer ensures homogeneous zinc deposition. Furthermore, the caffeine-enhanced electrolyte demonstrates high stability of the zinc metal anode in both symmetric and half-cell tests. Additionally, the Zn||NVO full cell with caffeine added electrolyte maintains a higher retention rate of discharge capacity compared to the blank electrolyte condition. © 2025 Tue, 01 Jul 2025 00:00:00 GMT https://scholar.korea.ac.kr/handle/2021.sw.korea/270773 2025-07-01T00:00:00Z https://scholar.korea.ac.kr/handle/2021.sw.korea/269328 Title: Dynamics of metal anode morphology: insights into aqueous Zn and Sn metal batteries at different current densities Authors: Lee, Young-Hoon; Jeoun, Yunseo; Cho, Beom-Keun; Park, Eunbin; Kim, Ji Hwan; Ahn, Kwang-Soon; Sung, Yung-Eun; Yu, Seung-Ho Abstract: Aqueous batteries, renowned for their cost-effectiveness and non-flammability, have attracted considerable attention in the realm of batteries featuring Zn-based and Sn-based configurations. These configurations employ Zn and Sn metal anodes, respectively. While the growth patterns of Zn under various current densities have been extensively studied, there has been a scarcity of research on Sn dendrite growth. Our operando imaging analysis reveals that, unlike Zn, Sn forms sharp dendrites at high current density emphasizing the crucial necessity for implementing strategies to suppress the dendrites formation. To address this issue, we introduced a carbon nanotube (CNT) layer on copper foil, effectively preventing the formation of Sn dendrites under high current density, thus enabling the high-current operation of Sn metal batteries. We believe that our work highlights the importance of suppressing dendrite formation in aqueous Sn metal batteries operating at high current density and introduces a fresh perspective on mitigating Sn dendrite formation. (c) 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Tue, 01 Jul 2025 00:00:00 GMT https://scholar.korea.ac.kr/handle/2021.sw.korea/269328 2025-07-01T00:00:00Z https://scholar.korea.ac.kr/handle/2021.sw.korea/268213 Title: Strategic engineering for overproduction of oviedomycin, a Type II polyketide, in Escherichia coli Authors: Gu, Boncheol; Kim, Duck Gyun; Cha, Yu-jin; Oh, Min-Kyu Abstract: This study aimed to develop a metabolically engineered Escherichia coli strain capable of producing oviedomycin, a type II angucyclinone polyketide compound with anticancer activity. We first addressed the challenges of in vivo reassembly of the type II polyketide synthase machinery in E. coli. These included co-expressing molecular chaperones, rare tRNAs, and a fusion tag to enhance the solubility of all proteins from the oviedomycin biosynthetic gene cluster in Streptomyces antibioticus. After the soluble expression of all the proteins was confirmed, oviedomycin production was improved by reducing the accumulation of the intermediate 3-dehydrorabelomycin through substrate channeling using the CipB scaffold protein from Photorhabdus luminescens. In addition, the AcrAB-TolC efflux transporter system was introduced to enhance the growth of the producing strain, leading to higher oviedomycin yields. Ultimately, fed-batch fermentation with the final strain produced 120 mg/L oviedomycin from glucose within 24 h. These strategies have marked significant progress in the construction of biosynthetic pathways for the heterologous production of type II polyketides in E. coli, offering promising potential for producing various natural products with industrial applications. © 2025 International Metabolic Engineering Society Tue, 01 Jul 2025 00:00:00 GMT https://scholar.korea.ac.kr/handle/2021.sw.korea/268213 2025-07-01T00:00:00Z