Noorulnajwa Diyana Yaacob
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Preferred name
Noorulnajwa Diyana Yaacob
Official Name
Noorulnajwa Diyana, Yaacob
Alternative Name
Yaacob, Noorulnajwa Diyana
Yaacob, N.
Yaacob, Noorulnajwa Diyana
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Scopus Author ID
54893883300
Researcher ID
GWC-3136-2022

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  • Publication
    Effect of different substrates and white Oyster mushroom loading on production of fungal foam
    (AIP Publishing, 2023)
    Noorulnajwa Diyana Yaacob
    ;
    Hanafi Ismail
    ;
    Nor Munirah Rohaizad
    In this study, agricultural wastes including rice husks, banana leaves and teak leaves were used to produce fungal foam through the cultivation with Pleurotus ostreatus fungi. The fungi are inoculated using different substrates and inoculum loadings. The mechanical properties of the foam produced were analysed. The best substrate and inoculum loading were proposed. Among the three substrates used, banana leave produced the best fungal foam in term of mechanical properties at 10 % w/w inoculum loading. The fungal foam can withstand forces high up to 30458.52 gF and have the resilience and springiness of 0.381 and 0.771, respectively. In summary, banana leave fungal foam is suitable as an alternative to the commercial Styrofoam.
      3  25
  • Publication
    Tensile, thermal properties, and biodegradability test of paddy straw powder-filled Polyhydroxybutyrate-3-Valerate (PHBV) biocomposites: acrylation pretreatment
    (Springer International Publishing, 2023)
    Noorulnajwa Diyana Yaacob
    ;
    Hanafi Ismail
    ;
    Sam Sung Ting
    The mechanical, thermal, and biodegradability properties of paddy straw powder (PSP)-filled polyhydroxybutyrate-3-valerate (PHBV) biocomposites were investigated. The impacts of chemical alteration of PSP via acrylic acid treatment were examined as well. The outcomes of the study portrayed a decrease in the elongation at break and tensile strength when the filler loading increased; however, the modulus elasticity of composites could be seen to increase. Chemical alteration of PSP via acrylic acid enhanced modulus elasticity of the biocomposites and tensile strength; nevertheless, the elongation at break was decreased. Thermogravimetric analysis demonstrated the enhancement of thermal stability of the biocomposites via PSP compared to neat PHBV. The thermal stability of the biocomposites was positively affected by chemical alteration of PSP. Meanwhile, DSC analysis proved that the melting temperature (T m) of the biocomposites was not altered when the filler was added. Treated biocomposites demonstrated higher crystallinity (30.18%) compared to the untreated composites (26.24%). Biodegradability test showed the strains from both Aspergillus species have the potential to degrade PHBV/PSP biocomposites. The weight loss of biocomposites after undergoing fermentation with Aspergillus fumigatus strain SGE57 and Aspergillus niveus isolate A17 was 2.42% and 3.65%, respectively.
      19  3