Yii Siang Hii

ORCID: 0000-0003-0915-4332
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Research Areas
  • Coral and Marine Ecosystems Studies
  • Microplastics and Plastic Pollution
  • Marine Bivalve and Aquaculture Studies
  • Toxic Organic Pollutants Impact
  • Environmental Toxicology and Ecotoxicology
  • Marine and fisheries research
  • Aquaculture Nutrition and Growth
  • Polar Research and Ecology
  • Microbial bioremediation and biosurfactants
  • Reproductive biology and impacts on aquatic species
  • Marine and coastal ecosystems
  • Marine and Offshore Engineering Studies
  • Water Quality and Pollution Assessment
  • Recycling and Waste Management Techniques
  • Fish Ecology and Management Studies
  • Geology and Paleoclimatology Research
  • Groundwater and Isotope Geochemistry
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Marine and coastal plant biology
  • Agriculture and Agroindustry Studies
  • Algal biology and biofuel production
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Community-based Tourism Development and Sustainability
  • Tardigrade Biology and Ecology
  • Child Nutrition and Water Access

Universiti Malaysia Terengganu
2011-2022

Oregon State University
2021

Hospital Sultanah Nur Zahirah
2021

Universiti of Malaysia Sabah
2021

ABSTRACT We investigated the temporal variation of bacterial production, respiration, and growth efficiency in tropical coastal waters Peninsular Malaysia. selected five stations including two estuaries three water stations. The temperature was relatively stable (averaging around 29.5°C), whereas salinity more variable estuaries. also measured dissolved organic carbon nitrogen (DOC DON, respectively) concentrations. DOC generally ranged from 100 to 900 μM, DON 0 32 μM. Bacterial respiration...

10.1128/aem.01227-09 article EN Applied and Environmental Microbiology 2009-10-10

Sodium alginate is the most commonly used polymer matrix in microalgae immobilization for water treatment. However, susceptibility of matrixes to cation chelating agents and antigelling limits use alginates estuarine marine systems. Hence, present study aims investigate stability bead feasibility grow when immobilized Different concentrations hardening calcium were formulate beads. The beads incubated Guillard’s f/2 medium shaken vigorously by using orbital shaker 15 days. results indicated...

10.1155/2017/6951212 article EN cc-by International Journal of Polymer Science 2017-11-13

This study reveals the effect of elevated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>p</mml:mi><mml:msub><mml:mrow><mml:mtext>CO</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>on Porites cylindrica and Galaxea fascicularis . The corals responded differently under...

10.1155/2009/215196 article EN cc-by Journal of Marine Biology 2009-01-01

Fatty acid profiles of Moina macrocopa enriched with lipids from inexpensive squid or canola oil were compared a commercial enrichment diet, A1 DHA Selco® (ADS). Arachidonic (AA) significantly increased &lt;0.01 to 0.28 mg/g body weight in ADS at 1 g/l for 12 h and 0.38 2 h. The highest increase eicosapentaenoic (EPA; 0.15 mg/g) was obtained when increases docosahexaenoic (DHA; originally &lt;0.01) (increased 0.09) 24 (rose 0.8 mg/g). AA:EPA ratio treated AA:DHA while the DHA:EPA

10.46989/001c.20648 article EN cc-by-nc-nd Israeli Journal of Aquaculture - Bamidgeh 2012-01-01

The zooplankton Moina macrocopa was cultured with three kinds of emulsified lipid media (Selco®, squid oil, canola oil) and two fish wastes (fish pellets feces) to determine the impact these food sources on its population dynamics. All diets were provided at five levels: 0.0625, 0.125, 0.25, 0.5, 1.0 g/l. For all diets, life history parameters showed highest values lowest concentrations, i.e., &lt;0.125 Overall demographic performance better in M. fed liquid than raised control treatment...

10.46989/001c.20668 article EN cc-by-nc-nd Israeli Journal of Aquaculture - Bamidgeh 2013-01-01

Straits of Malacca and South China Sea are vulnerable to oil pollution because the huge amount crude transported through these waters annually. The present level in is between 150-300 μ g L− 1 water 70–100 mg kg− sediment. Whenever there an spill Malacca, could be raised higher than 500 1. Crude oil, especially aromatic hydrocarbon fraction, highly toxic marine organisms. index for environments set at 1000 100 non-effect on organisms about 50 tropical sea. Toxicological studies demonstrated...

10.1080/14634980600701583 article EN Aquatic Ecosystem Health & Management 2006-06-14

Three short sediment cores (12-32 cm) from South China Sea off Southern Terengganu were collected during May (post-Northeast monsoon) and September (pre-Northeast 2007.The concentration of total organic carbon (TOC) obtained ranged 0.41-2.23 0.38-2.31%during post pre-monsoon, respectively.TOC was found to decrease with depth distance the coast river mouth.In particular, station close proximity exhibits most pronounced variation TOC depth.Besides spatial variation, it is noted that seasonal...

10.17576/jsm-2015-4407-04 article EN Sains Malaysiana 2015-07-01

The effects of two widely used pesticides in paddy fields, 2, 4-D, dimethylamine and endosulfan, on growth, photosynthetic rate the pigments Chaetoceros sp. Nannochloropsis were assessed this study. 48 hour 50% inhibitory concentration (IC50) value for 4-D 142.2 mg l−1 211.8 l−1, respectively, IC50 endosulfan 21.9 μ g 45.8 respectively. Endosulfan was much more toxic to microalgae than dimethylamine. Both reduced oxygen production microalgae. After hours exposure pesticides, transferred a...

10.1080/14634980903347662 article EN Aquatic Ecosystem Health & Management 2009-11-30

Abstract Reefing of Oil and Gas structure has become as one the emerging options for decommissioning an O&amp;G Structure offshore requires expert input beyond engineering such biomarine environmental sciences. This paper will present interdisciplinary collaborative effort by industries with academia in Malaysia developing a reef viability index first high level screening to assess suitability using reefing option region. The results formulation identify area that potential be used...

10.2118/199190-ms article EN 2019-11-27

Decommissioning of the offshore platform as an artificial reef, known Rigs-to-Reefs (R2R), has become a sustainable approach for oil companies. The was reused to serve underwater ecosystem reef new marine which helps tackle food security issue. This paper presents findings formulation reefing viability index recognize region that can be used R2R projects within South China Sea. combined effects spatial data, numerical modelling, and geographic system (GIS) are proposed study relationship...

10.1155/2020/4695894 article EN cc-by The Scientific World JOURNAL 2020-10-21
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