Hideo Okamura

Identification of antifouling paint particles among colored paint chips in coastal sediments of Phuket, Thailand, using Py-GC/MS

Ryosuke Nozaki, Hiroe Ichiba, Hideo Okamura, Chee Kong Yap et autres

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Evaluation of Organic Pollutants Derived from Ship in Operation

Hiroki Yoshida, Masashi Kusunoki, Goichi Kon, Ryohei Nakatsubo et autres

Many ships are switching to low sulfur fuel oil due to the global sulfur cap 2020. The switch to low sulfur fuel oil is expected to reduce not only SOx but also organic pollutants contained in PM. In this study, the emission …

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Developing marine biodegradable polymers with biodegradabilities controlled using metal-free photocatalysts due to their antibacterial properties under sunlight

Akihiko Masui, Satoshi Ikawa, Jo Tsunashima, Sho Usuki et autres

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Main components of PM in ship exhaust gas

Masashi Kusunoki, Hiroki Yoshida, Goichi Kon, Ryohei Nakatsubo et autres

The 2020 SOX regulation based on MARPOL73/78 requires ships to use low-sulfur fuel oil or to install exhaust gas scrubbers. In this study, PM emitted from ships before and after fuel oil conversion was collected by actual ship experiments, investigated the characteristics …

The Role of Molluscs in Monitoring Marine Pollution and its Connection to Climate Change and ESG

Chee Kong Yap, Kennedy Aaron Aguol, Meng Chuan Ong, Wan Mohd Syazwan et autres

Molluscs possess a unique capability to filter and remove pollutants from water, offering a natural and effective solution to combat marine pollution. Their filtration process not only enhances water quality but also mitigates the detrimental impacts of contaminants on marine ecosystems. As …

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Porphyrin as Photosensitizers for Controlling Marine Biodegradation of Polymer Composites

Shodai Hino, Akihiko Masui, Hideo Okamura, Norioki Kawasaki et autres

Biodegradable polymer–photosensitizer composites were developed, which is suppressed biodegradation due to bactericidal activity under light irradiation but proceeds under dark conditions. The composites exhibited antibacterial activity under light irradiation, which was attributed to the generation of singlet oxygen ( 1 O 2 …

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Limited Pelagic Larval Dispersal of the Green-lipped Mussel Perna viridis Populations between the Western and Eastern Causeway of Johore

Chee Kong Yap, Krishnan Kumar, Wan Hee Cheng, Wan Mohd Syazwan et autres

A crucial yet mysterious process in the fine-scale temporal genetic variability of marine new settlers has been highlighted in a study by Bode et al. (2019 ). Direct genetic methods have contributed to our understanding of larval dispersal by revealing new evidence …

A review of the active industrial area at Pasir Gudang area, Johore: Some notes and knowledge gaps

Chee Kong Yap, Nur Faradilla Mohd Sabri, Krishnan Kumar, Mohamad Saupi Ismail et autres

This study aimed to examine the literature on Pasir Gudang, analyse the gathered material, and identify areas lacking knowledge. The literature research reveals that the published studies may be classified into hydrological, monitoring and forecasting, social, economic, and environmental issues. Nevertheless, the …

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Copper in Commercial Marine Fish: From Biomonitoring to the ESG (Environment, Social, and Governance) Method

Chee Kong Yap, Tze Yik Austin Hew, Rosimah Nulit, Wan Mohd Syazwan et autres

The presence of potentially harmful metals in commercially available saltwater fish has been extensively documented in scientific literature. This has demonstrated the significance of monitoring the crucial copper (Cu) levels in fish fillets from a perspective focused on human health risks (HHR). …

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A preliminary observational study on coastal outfalls from selected coastal water of Port Dickson

Jia Ming Chew, Chee Kong Yap, Krishnan Kumar, Wan Hee Cheng et autres

Research background: The coast of Port Dickson (PD), a popular tourist destination, is known for its recreational purposes. However, even some of the tourist beaches have coastal outfalls. These outfalls, known to discharge both treated and untreated water due to their cost-effectiveness …

Residues of non-phthalate plasticizers in seawater and sediments from Osaka Bay, Japan

Miho Nomura, Hideo Okamura, Yoshifumi Horie, M. Pramono Hadi et autres

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A preliminary random checklist of benthic organisms in selected lakes of west peninsular Malaysia

Jia Ming Chew, Chee Kong Yap, Mohamad Saupi Ismail, Sarini Ahmad Wakid et autres

The freshwater ecosystem (Kelana Jaya Lake, Seremban Lake Garden and Kanching Eco Forest Park) of west Peninsular Malaysia was the focus of the study's attempt to offer a current checklist of benthic organisms. Three benthic organisms were identified in the urbanized Kelana …

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