Karina Larasati
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ANALISIS FISIOLOGI JAMUR LIGNINOLITIK DAN SELULOLITIK ASAL TANAH GAMBUT DESA RIMBO PANJANG KABUPATEN KAMPAR SEBAGAI AGEN BIOKOMPOS Larasati, Karina; Roza, Rodesia Mustika; Martina, Atria
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Cellulolytic and ligninolytic fungi have an important role in degradation of organic materials, especially lignin and cellulose, in a composting process. The success of the fungi in the composting process is strongly influenced by temperature and pH. The purpose of this research was to obtain isolates of the fungi with the best ability to be applied as biocompost agent by analyzing its ability to grow in different temperature and pH. A total of 110 isolates from peatsoil in Rimbo Panjang, Kampar Regency, Riau was inoculated into Potato Dextrose Broth medium with pH of 5 and pH of 7 then incubated for 3 days at room temperature (±27ºC), 40ºC, 50ºC, 60°C, 70ºC and 80ºC. The results obtained 110 isolates which were grown at room temperature (±27ºC) with pH of 5 and pH of 7 and 96 isolates which were grown at 40ºC temperature. A total of 27 isolates which were grown at 50ºC temperature consisted of genus Penicillium, Trichoderma, and Aspergillus.
Pengaruh Polyethylene Fiber pada Material Resin Komposit Terhadap Jumlah Koloni Streptococcus mutans Larasati, Karina; Siswomihardjo, Widowati; Sunarintyas, Siti
Jurnal Material Kedokteran Gigi Vol 6 No 2 (2017): JMKG Vol 6 No 2 September 2017
Publisher : Ikatan Peminat Ilmu Material dan Alat Kedokteran Gigi (IPAMAGI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.03 KB) | DOI: 10.32793/jmkg.v6i2.269

Abstract

Fiber reinforced composite (FRC) is a material made of polymer matrix and fiber. Polyethylene fiber is one of the commonly used fiber due its good strength. FRC in the oral cavity will interact with saliva and microorganisms.S. mutans is microorganisms present in oral cavity. The purpose of this study was to determine the effect ofpolyethylene fiber on FRC to S. mutans colony counts. Flowable composite and  polyethylene fiber are material used in this study. Bar-shaped samples sized 5 x 4 x 2 mm (n = 4) immersed in 5 mL saliva for 1 hour, then immersed in suspension containing S. mutans and incubated for 24 hours at 37°C. The suspension diluted to 10 then 0.1 mL of the dilution were put in a solid medium and incubated for 48 hours at 37°C. Streptococcus mutans were grown on solid media was determined by direct count. Data were statistically analyzed using unpaired t-test. The results of unpaired t-test showed a significance difference of S. mutans colony between composite resin and FRC with polyethylene fiber (p <0.05). The conclusion from this study was the addition of polyethylene fiber on the composite material significantly increased the number of colonies of Streptococcus mutans.