https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/3 2026-07-04T03:52:54Z 2026-07-04T03:52:54Z Choi, Jung Hoon Hwang, Book Kee Lee, Byung Kwon https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/210964 2026-02-26T07:01:40Z 2025-12-01T00:00:00Z

Title: The Junior Mobile Engineering Classes for Youth Engineering Education Operated by Hanyang University and Hyundai Mobis as Part of Their Corporate Social Responsibility Activities Authors: Choi, Jung Hoon; Hwang, Book Kee; Lee, Byung Kwon Abstract: Since 2014, Hanyang University and Hyundai Mobis have operated the Junior Mobile Engineering Class by visiting schools and science event venues nationwide that require youth engineering education with a 12-ton trailer equipped with scientific equipment as part of their role as a university and company contributing to society. The Junior Mobile Engineering Classes are operated in two forms. First, it is a program conducted as a single event, where schools or science event venues interested in engineering education are visited to perform engineering related experiments and plays. Second, it is a program that systematically and continuously provides education related to the school curriculum by visiting schools and institutions that want continuous engineering education every month. The contents of the Junior Mobile Science Class, based on the STEAM education concept developed by Hanyang University's Discovery Centre for Science and Technology for Young Scientist, are systematically organized to enable students to understand through experiments how the scientific principles in textbooks are applied to technology and engineering. Especially, the contents of this Junior Mobile Engineering class are designed to inspire students' imagination and creativity by providing them with understanding of engineering and predicting future technologies & engineering. Surveys conducted on students who participated in these Junior Mobile Engineering classes showed that their understanding and interest in engineering increased significantly. In addition, Regarding Hyundai Mobis, which is participating in the joint operation, we could see a very positive change in its image as a company that contributes to society.

2025-12-01T00:00:00Z Srivastava, Anjali Singh, Asha Lata Yadav, Monika Kurade, Mayur B. Kumar, Ramesh Khan, Moonis Ali Jeon, Byong-Hun https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/210464 2026-01-26T05:30:25Z 2025-09-01T00:00:00Z

Title: Bioremediation of Chromium-contaminated Agricultural Soil Using Alginate-Encapsulated Bacterial Beads Authors: Srivastava, Anjali; Singh, Asha Lata; Yadav, Monika; Kurade, Mayur B.; Kumar, Ramesh; Khan, Moonis Ali; Jeon, Byong-Hun Abstract: In this study, the efficacy of indigenous bacteria present in Cr-contaminated soil was tested for soil decontamination. Potential bacterial strains were screened and selected from soil samples and immobilized on sodium alginate beads. The most effective Cr(VI) reducing strain identified using 16S rRNA genome sequencing was Enterococcus italicus. Bacterial beads of E. italicus were optimized for Cr(VI) reduction under various exploratory conditions, such as temperature, pH, biomass, contact period, and different nutritional sources. Beads containing 1000 mg/g of E. italicus biomass reduced up to 91% of Cr(VI) (from an initial 5.4 mg/g in the soil) at pH 7 and 35 ℃ within 2 h. Glucose was found to be a good source of electron contributors that can reduce up to 94% of Cr(VI). FTIR analysis of the Cr(VI)-treated bacterial beads showed amines, -COO−, -CH3, C–O–C, and PO2 as new functional groups, revealing absorption and reduction of Cr(VI) from contaminated soil. The cell size of E. italicus after Cr-contaminated soil treatment was larger than that of untreated bacterial cells. The elemental analyses of treated and untreated bacterial cells revealed the presence of Cr inside the treated cells of E. italicus, which were transported from the soil during its treatment. Further, the XPS analysis confirmed the reduction of Cr(VI) to Cr(III) in the treated bacterial beads of E. italicus.

2025-09-01T00:00:00Z Ahn, Hyun-Jo Yadav, Nikita Tanpure, Rahul Basak, Bikram Kurade, Mayur B. Xiong, Jiu-Qiang Salama, El-Sayed Li, Xiangkai Chung, Woo Jin Jeon, Byong-Hun https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/211726 2026-03-30T01:31:00Z 2024-10-01T00:00:00Z

Title: Assessing ecotoxicity, removal efficiency, and molecular response of freshwater microalgae to bisphenol AP Authors: Ahn, Hyun-Jo; Yadav, Nikita; Tanpure, Rahul; Basak, Bikram; Kurade, Mayur B.; Xiong, Jiu-Qiang; Salama, El-Sayed; Li, Xiangkai; Chung, Woo Jin; Jeon, Byong-Hun Abstract: Bisphenol AP (BPAP), an analog of BPA and endocrine disrupter, is increasingly being detected in water, signaling its rise as an environmental contaminant similar to BPA, which is known for its health implications. This study investigated the ecotoxicity of BPAP in four freshwater microalgae (Chlorella sorokiniana, Chlamydomonas mexicana, Scenedesmus obliquus, and Chlorella vulgaris), along with their removal potential and biotransformation. This was followed by de novo transcriptomic analysis to elucidate the molecular response after BPAP exposure. The toxicity (120 h-EC50) of BPAP for microalgal species ranged from 1.509 mg L−1 to 6.509 mg L−1. C. mexicana exhibited the highest removal efficiency of 86.5 % after 12 days, followed by C. vulgaris (86.0 %), S. obliquus (78.9 %), and C. Sorokiniana (56.5 %) at 1 mg L−1. Eight biotransformed BPAP products were analyzed, and their toxicity was predicted to be lower than that of BPAP using the Ecological Structure Activity Relationships software. Transcriptomic analysis of C. mexicana revealed the differential expression of 4611 genes in processes related to metabolism, cellular activities, and stress responses. Genes encoding methyltransferases, glycosyltransferases, and various oxidoreductases, including electron-transferring flavoprotein dehydrogenase and glutaredoxin, were significantly upregulated in algal cells exposed to BPAP, suggesting the potential of C. mexicana for BPAP detoxification via glycosylation and transmethylation. These results offer novel insights into the ecotoxicity, removal potential, and biotransformation of BPAP in freshwater microalgae, with transcriptomic analysis, elucidating the molecular mechanisms of BPAP detoxification for effective environmental remediation.

2024-10-01T00:00:00Z Mustafa, Ghulam Zahid, Muhammad Tariq Kurade, Mayur Bharat Alvi, Aliya Ullah, Faheem Yadav, Nikita Park, Hyun-Kyung Khan, Moonis Ali Jeon, Byong-Hun https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/206605 2026-02-01T06:07:22Z 2024-05-01T00:00:00Z

Title: Microalgal and activated sludge processing for biodegradation of textile dyes Authors: Mustafa, Ghulam; Zahid, Muhammad Tariq; Kurade, Mayur Bharat; Alvi, Aliya; Ullah, Faheem; Yadav, Nikita; Park, Hyun-Kyung; Khan, Moonis Ali; Jeon, Byong-Hun Abstract: The textile industry contributes substantially to water pollution. To investigate bioremediation of dye-containing wastewater, the decolorization and biotransformation of three textile azo dyes, Red HE8B, Reactive Green 27, and Acid Blue 29, were considered using an integrated remediation approach involving the microalga Chlamydomonas mexicana and activated sludge (ACS). At a 5 mg L−1 dye concentration, using C. mexicana and ACS alone, decolorization percentages of 39%–64% and 52%–54%, respectively, were obtained. In comparison, decolorization percentages of 75%–79% were obtained using a consortium of C. mexicana and ACS. The same trend was observed for the decolorization of dyes at higher concentrations, but the potential for decolorization was low. The toxic azo dyes adversely affect the growth of microalgae and at high concentration 50 mg L−1 the growth rate inhibited to 50–60% as compared to the control. The natural textile wastewater was also treated with the same pattern and got promising results of decolorization (90%). Moreover, the removal of BOD (82%), COD (72%), TN (64%), and TP (63%) was observed with the consortium. The HPLC and GC-MS confirm dye biotransformation, revealing the emergence of new peaks and the generation of multiple metabolites with more superficial structures, such as N-hydroxy-aniline, naphthalene-1-ol, and sodium hydroxy naphthalene. This analysis demonstrates the potential of the C. mexicana and ACS consortium for efficient, eco-friendly bioremediation of textile azo dyes.

2024-05-01T00:00:00Z