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1. The Influence of New and Artificial Aged Microplastic and Leachates on the Germination of Lepidium sativum L

Author

Stephan Pflugmacher, Amalia Sulek, Hannah Mader, Jeongin Heo, Ji Hyeon Noh, Olli-Pekka Penttinen, YoungJun Kim, Sanghun Kim, and Maranda Esterhuizen

Subjects
polycarbonate, microplastic, artificially aged microplastic, leached microplastic, leaching solution, bisphenol a, seed germination parameters, lepidium sativum, Botany, QK1-989
Abstract

With the increase in environmental monitoring and assessing, we are gaining insight into the extent of microplastic pollution in our environment. The threat posed by microplastics to biota could come, e.g., from leached substances. As some plastic materials have been decaying in nature for extended periods already, the toxic effects of leaching compounds need to be investigated. It is furthermore essential to understand the adverse effects of new plastic and how these effects differ from the effects elicited by old plastic material. Therefore, in the present study, the effects of exposure to leachates from new and artificial aged polycarbonate as well as new and aged polycarbonate granules on various germination parameters of Lepidium sativum were studied. Germination, root, and shoot length, as well as the calculated germination rate index as a measure for germination speed, was negatively influenced in substrate-free and substrate containing exposures. From an ecological and agricultural point of view, this implies possible yield losses with less germinating seeds, slower plant germination speed, and smaller seedlings in general.

Published
2020
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2. Job-specific Questionnaire for Estimating Exposure to Hazardous Agents among Semiconductor Workers

Author

Donguk Park, Jihoon Park, Hojang Kwon, Kwonchul Ha, Hyunseog Roh, Won Kyung Kim, Jeongin Heo, Seung Won Kim, H Y Kim, Sangjun Choi, and Chungsik Yoon

Subjects
Estimation, Engineering, Work (electrical), business.industry, Hazardous waste, Distribution (economics), Operations management, Creative commons, Open university, business, License, Exposure assessment
Abstract

Objectives: One major limitation encountered in retrospective exposure assessment for epidemiological study is the lack of exposure records and information maintained by companies which if they existed would allow the estimation of past exposure to hazardous operations and agents. This study developed a job-specific questionnaire(JSQ) to estimate exposure profiles among semiconductor workers, including operation and job. Methods: This JSQ can be directly applied to workers who work or have worked in a wafer fabrication or a chip packaging and assembly facility. Results and Conclusions: We used this JSQ to obtain past exposure information from semiconductor workers via face-to-face investigation. Major contents include questions on the facilities, operations and jobs to which they have been exposed since they *Corresponding author: Dong Uk Park, Tel: 02-3668-4707, E-mail: pdw545@gmail.comDepartment of Environmental Health, Korea National Open University, 169 Dongsung-dong, Jongroku, Seoul, KoreaReceived: February 3, 2016, Revised: March 4, 2016, Accepted: March 14, 2016This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published
2016

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