Syahiddin Dahlan Said
Jurusan Teknik Kimia Universitas Syiah Kuala, Jl. Syech Abdurrauf, No. 7, Banda Aceh - Indonesia

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Spore Production of Biocontrol Agent Trichoderma Harzianum: Effect of C/N ratio and Glucose Concentration Said, Syahiddin Dahlan
Jurnal Rekayasa Kimia & Lingkungan Vol 6, No 1 (2007): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Effects of medium condition on spore production and spore viability of Trichoderma harzianum UPM 29 isolated from oil palm rhizosphere were studied. The carbon to nitrogen (CN) ratio and glucose concentration have significant effect on spore production and spore viability of the fungus. Highest spore production (1.6x108spores/ml) was obtained in a medium containing 30 g/l glucose with a CN ratio of 24. The highest spore viability (52.5%) was produced in the culture grown on media with glucose concentration of 30 g/l and with a C/N ratio of 44.Keywords: biocontrol agent, biofungicide, spore viability, Trichoderma harzianum
Spore Production by Biocontrol Agent Trichoderma Harzianum in Submerged Fermentation: Effect of Agitation and Aeration Said, Syahiddin Dahlan
Jurnal Rekayasa Kimia & Lingkungan Vol 6, No 2 (2007): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Effects of agitation and aeration on spore production and spore viability by biocontrol agent UPM 29 were investigated. The optimum fermentation at different agitation speeds, ranging from 300 rpm to 700 rpm show that there is an optimum agitation speed gives the highest spore production. The spore production increased with increasing agitation speed from 300 rpm to 500 rpm. At the higher agitation speed the spore production dropped. The highest spore concentration (9.2x107 spores/ml) was produced in culture grown on media with agitation speed of 500 rpm. The rate of aeration effected spore production and spore productivity in the range 1.5 to 2.0 vvm, and increased the spore production from 4.7x107 to 6.0x107 spores/ml (28% increase) and 4.7x108 to 8.1 x108 spores /l/h respectively. The spore viability was not affected significantly by aeration rate or agitation speed.Keywords: agitation, biocontrol agent, biofungicide, spore viability, Trichoderma harzianum
KAJIAN PENAMBAHAN SELULOSA MIKROBIAL NATA DE COCO DAN ZAT ADITIF TERHADAP SIFAT FISIK KERTAS BATANG PISANG ABAKA (Study of The Addition of Microbial Cellulose Nata de Coco and Additives towards Physical Characteristics of Abaca Banana Stem Based Paper) Fitriani, Fitriani; Mahidin, Mahidin; Said, Syahiddin Dahlan; Busthan, Meuthia
Jurnal Hasil Penelitian Industri Vol 29, No 2 (2016)
Publisher : Baristand Industri Banda Aceh

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Abstract

Utilization of cellulose derived from wood as a raw material for pulp and paper inIndonesia increases gradually. This condition leads to deforestation in Indonesia and causes various sideeffects on the environment. The objective of this research is to study the effect of the addition of microbialcellulose nata de coco and additives towards physical characteristics of abaca banana stem paper byusing Peroxide Alkaline Pulping (APP) method. The combination of microbial cellulose pulp nata de cocoand banana stem pulp ratio of 0:100 ; 25:75 ; 50:50 ; 75:25 ; 100:0 and the addition of additives to themix the pulp with variations (b/b): without additives, tapioca (1%, 3% and 5%) and kaolin (5%, 10%, and15% used in the process of forming a sheet of paper. The results showed the addition of a bit of microbialpulp cellulose and pulp stems of the banana abaca could improve the physical strength of paper withgrammage 157.13 gr/m², a thickness of 0.0058 mm, water content of 4.48%, water absorption of 22.21%,tensile resistance 5 kN/m and elongation of 38.59%.