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Your search keyword '"Ida Idayu Muhamad"' showing total 3 results
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3 results on '"Ida Idayu Muhamad"'

1. Impregnation of Poly(lactic acid) on Biologically Pulped Pineapple Leaf Fiber for Packaging Materials

Author

Saiful Izwan Abd Razak, Noor Fadzliana Ahmad Sharif, Nadirul Hasraf Mat Nayan, Ida Idayu Muhamad, and Mohd Yazid Yahya

Subjects
Pineapple leaf fiber, Coating, Impregnation, Paper, Poly(lactic acid), Packaging materials, Biotechnology, TP248.13-248.65
Abstract

Newly developed packaging paper made of biopulped pineapple leaf fiber (PALF) and poly(lactic acid)(PLA) was studied. PALF packaging sheets were solvent impregnated with PLA at different concentrations in order to improve their moisture barrier and mechanical performance. With the impregnation of PLA at a concentration of 4%, the packaging material exhibited a low moisture uptake and a high tear index. An electron micrograph of the sample at 4% impregnation revealed uniform and packed PLA reversed microsphere morphology. These results suggest that surface coating via biodegradable polymers, such as PLA, may be utilized for manufacturing packaging materials in industrial applications. This new packaging material could reduce the dependency on wood-based paper and plastic-based packaging.

Published
2015
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2. Process Parameters for Fermentation in a Rotary Disc Reactor for Optimum Microbial Cellulose Production using Response Surface Methodology

Author

Khairul Azly Zahan, Norhayati Pa'e, and Ida Idayu Muhamad

Subjects
Microbial cellulose, Rotary disc reactor, Process parameters, Optimization, Response surface methodology, Pineapple waste, Acetobacter xylinum 0416, Biotechnology, TP248.13-248.65
Abstract

In this study, microbial cellulose production by Acetobacter xylinum 0416 using standardized liquid pineapple waste was carried out in a 4-L rotary disc reactor (RDR). The objective of this study was to optimize the process parameters for production of microbial cellulose in the RDR. The effects of the disc rotation speed (5 to 12 rpm), pH (3.5 to 7.5), fermentation period (3 to 6 days), and inoculum concentration (3 to 20% v/v) on the microbial cellulose production were investigated. The optimum microbial cellulose yield was obtained using 10% (v/v) of inoculum concentration, whereby four days’ duration gave the most productive yield. In addition, the highest production of microbial cellulose was obtained at a low disc rotation speed of 7 rpm and a pH of 5.0. Analysis of data performed a high coefficient of determination value (R2=0.875) represented by a mathematical model of optimized microbial cellulose production, Y = -200.437 + 7.180X1 + 69.869X2 + 4.369X3 + 1.867X4 – 0.512X12 – 6.766X22 – 0.585X32 – 0.079X42. From the results, it can be concluded that the foremost factors that affect the production of microbial cellulose in RDR were pH followed by inoculum concentration, disc rotation speed (rpm), and fermentation period.

Published
2014
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3. Process Parameters for Fermentation in a Rotary Disc Reactor for Optimum Microbial Cellulose Production using Response Surface Methodology

Author

Ida Idayu Muhamad, Khairul Azly Zahan, and Norhayati Pa’e

Subjects
Optimization, Microbial cellulose, Environmental Engineering, Materials science, Coefficient of determination, Process parameters, lcsh:Biotechnology, Bioengineering, Pulp and paper industry, Acetobacter xylinum, Rotary disc reactor, Response surface methodology, lcsh:TP248.13-248.65, Scientific method, Yield (chemistry), Botany, Fermentation, Pineapple waste, Acetobacter xylinum 0416, Waste Management and Disposal
Abstract

In this study, microbial cellulose production by Acetobacter xylinum 0416 using standardized liquid pineapple waste was carried out in a 4-L rotary disc reactor (RDR). The objective of this study was to optimize the process parameters for production of microbial cellulose in the RDR. The effects of the disc rotation speed (5 to 12 rpm), pH (3.5 to 7.5), fermentation period (3 to 6 days), and inoculum concentration (3 to 20% v/v) on the microbial cellulose production were investigated. The optimum microbial cellulose yield was obtained using 10% (v/v) of inoculum concentration, whereby four days’ duration gave the most productive yield. In addition, the highest production of microbial cellulose was obtained at a low disc rotation speed of 7 rpm and a pH of 5.0. Analysis of data performed a high coefficient of determination value (R2=0.875) represented by a mathematical model of optimized microbial cellulose production, Y = -200.437 + 7.180X1 + 69.869X2 + 4.369X3 + 1.867X4 – 0.512X12 – 6.766X22 – 0.585X32 – 0.079X42. From the results, it can be concluded that the foremost factors that affect the production of microbial cellulose in RDR were pH followed by inoculum concentration, disc rotation speed (rpm), and fermentation period.

Published
2014

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