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Enhancement of Power Generation in Microbial Fuel Cells through Supplementation of <i>Platycodon grandiflorum</i>in Doraji Roots

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Journal of Sustainable Bioenergy Systems 2019年第4期9卷 169-178页

作者： Jung-In Park Hyunjin Kim Dae Kyung Go Peter S. Park Sang Heon lee Min Jung Koh Jonathan Jo Donghoon lee seungshin lee Paul S. Chung Fuzbien Technology Institute Rockville MD USA Youth with Talents Fairfax VA USA St. Johnsbuury Academy Jeju Korea Department of Biology School of Arts and Sciences Cornell University Ithaca NY USA School of Arts and Sciences Johns Hopkins Baltimore MD USA

The current study reports the evidence of enhancement in power generation from cellulosic biomass in microbial fuel cell (MFC) systems by supplementing dried Doraji (Platycodon grandiflorum) roots powder. Mediator-less two chamber H-type MFCs were prepared using rumen fluid as anode inocula to convert finely ground pine tree (Avicel) at 2% (w/v) to electricity. Dried Doraji roots were ground to pass 1 mm sieve and added to the anode of MFC at 0.1% w/v dosage for treatment. MFC power and current across an external resistor were measured daily for 10 d. At the end of incubation on d10, collected gases were measured for total gas volume and analyzed for gas composition on gas chromatography. Supplementation of Doraji roots powder to MFC anode chamber increased power generation and CO2 production. Over the 10d experimental period, power density normalized to anode surface area were between 17.0 and 37.7 with average of 32.5 mW/m2 in Doraji MFCs, and between 16.8 and 19.8 with average of 18.2 mW/m2 in control group. CO2 production increased and methane to CO2 ratio decreased in Doraji root treatment comparing to control group. These observations imply that Doraji root components would inhibit methanogenesis and alter microbial fermentation of cellulose compounds favorable to produce bioenergy efficiently in MFC.

关键词： MFC Platycodon grandiflorum

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Human Rights and Social Stigma Review for Leprosy Patients in Korea

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Advances in Infectious Diseases 2021年第1期11卷 73-83页

作者： seungshin lee David Ahn Justin Kim Cathy Park Kunmin Kim Alice Kim Chae Eun Kim Jisu Shin Timothy Cho Jonathan Jo David Park Tae Youn Kim Paul S. Chung School of Medicine University of California Irvine CA USA Youth with Talents Fairfax VA USA Fuzbien Technology Institute Rockville MD USA

Leprosy is a chronic disease caused by a low multiplying bacillus, Mycobacterium leprae, which primarily affects the skin and the extremities. Multidrug therapy (MDT) and Bacillus Calmette-Guérin (BCG) vaccinations are effective at treatment of the disease, but social misconceptions about the disease inhibit efficient health care for affected individuals. In South Korea, leprosy patients face social, economic, and political discrimination. Korean leprosy patients are isolated into Sorokdo island and face challenges such as difficulty receiving education and limited job opportunities. Leprosy cognitively, emotionally, and socially impacts patients’ lives, and represents a serious social inequality issue. To raise awareness, dispel myths about the disease, and to end patient discrimination that destroys families, we conducted case studies based on scientific journals. The paper specifically focuses on difficulties faced by Korean leprosy patients, and subsequent initiatives by the government to aid patients. To reach the WHO’s target of health and wellbeing for all by 2030, we need to educate the masses about leprosy and address relevant social inequality issues.

关键词： Leprosy Sorokdo

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