Pusat Pengajian Sains Kajihayat - Tesis

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Now showing 1 - 5 of 1054
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    Water Quality And Heavy Metal Concentration In Zooplankton And Sediment Within Tidal Zone Of Sungai Perai
    (2025-08)
    Yusuf, Zaharadeen Hassan
    This study investigates the water quality and accumulation of heavy metals in sediments and zooplankton of Sungai Perai. Water, sediment, and zooplankton samples were collected from eight sites along the river during the ebb neap and spring tides of January, February, April, and May 2024. For water quality, electrical conductivity (EC), total dissolved solids (TDS), salinity (Sal), dissolved oxygen (DO), temperature (Temp), and Secchi disk depth were measured in situ. Biochemical oxygen demand (BOD), total suspended solids (TSS), orthophosphate (PO4), nitrite (NO2), ammonia (NH3), and chlorophyll a (Chl a) were analysed in the lab using standard methods.
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    Biosynthesis And Characterisation Of Silver Nanoparticles Using Streptomyces Sp. Pbd311b With In Vitro And In Silico Biological Activity Towards Pseudomonas Aeruginosa
    (2025-08)
    Yang, Xinmin
    Pseudomonas aeruginosa is a multidrug-resistant pathogen that utilizes quorum sensing (QS) to regulate virulence and biofilm formation, making it a challenging target for conventional antibiotics. The development of alternative antibacterial and anti-QS strategies is crucial to combat its infections. This study aims to biosynthesize silver nanoparticles (bioAgNPs) using Streptomyces sp. PBD-311B and evaluate their antibacterial and anti-quorum sensing properties against P. aeruginosa sp. BioAgNPs were synthesized using Streptomyces sp. PBD-311B and characterized through ultraviolet–visible spectroscopy (UV-Vis), transmission electron microscopy (TEM), and scanning electron microscopy (SEM).
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    The Effects Of Killing Processes And Different Drying Methods On Nutrient Content And Physicochemical Characteristics Of Black Soldier Fly (Hermetia Illucens) Larvae
    (2025-09)
    Thanasakran, Shuganeswari
    Rising feed costs highlight black soldier fly (BSF) larvae as a sustainable feed option, with drying essential for stability. This study evaluated the effects of two killing methods (blanching (100 °C for 40 seconds) and freezing (-20 °C for 24 hours)) and three drying methods (sun drying (25-33 °C for 23-41 h), freeze-drying (-18 to - 50 °C for 72 h with oven drying at 80 °C for 24 h) and dehydrator drying (60 °C for 24h)) on the nutritional and physicochemical qualities of BSF larvae.
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    Evaluation Of The Role Of Arbuscular Mycorrhizal Fungi In Enhancing Ground Cover Plant Responsiveness, Propagation And Growth Performance Of Okra (Abelmoschus Esculentus L.)
    (2025-09)
    Hassan, Nurul Aziera
    Arbuscular mycorrhizal fungi (AMF) are known as bio-fertilizers because they are able to support plant nutrient uptake especially P. The compatibility of the AMF-plant interaction also benefits the abundance of AMF propagules in the soil. However, studies on plants in Malaysia to determine the plants AMF status and assess their level of responsiveness towards AMF are insufficient. Therefore, this study was conducted to assess the level of plant responsiveness towards AMF using ground cover plants (GCP) and employed the selected GCP species as AMF trap plants to propagate AMF propagules in the soil. Plant and soil samples were taken from 24 total quadrats from four sampling sites.
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    An Assessment Of The Terrestrial Large Mammals Population Abundance, Conservation Status And Challenges Of Management In A West African Protected Area
    (2025-09)
    Lawal, Mohammed Umar
    The global decline of large mammals is widely acknowledged as a major threat to ecosystems worldwide. In West and Central Africa, terrestrial large mammals are particularly threatened by trade and consumption. However, quantitative and scientific information on the population status and conservation of terrestrial large mammals within protected areas in Nigeria is either scarce or extremely limited. This research seeks to help close that information gap. In this study, the abundance, conservation status, seasonal population distribution, and the influence of poaching and vegetation factors on terrestrial large mammals were assessed in Old Oyo National Park, Nigeria, in 2022.