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Jurnal Aplikasi Fisika
Published by Universitas Halu Oleo
ISSN : -     EISSN : -     DOI : -
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Jurnal Aplikasi Fisika (JAF) terbit pertama kali pada bulan Agustus 2005, diterbitkan dengan frekuensi 2 kali setahun namun karna banyaknya paper yang akan dipublish terutama dari mahasiswa Fisika baik S1 maupun S2 yang telah menyelesaikan tugas akhir mulai Tahun 2017 jurnal ini terbit 3 kali dalam setahun (Edisi Pebruari, Juni, dan Oktober) .
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Articles 2 Documents
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Search results for , issue " Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA" : 2 Documents clear
Efek Microwave pada Proses Deasetilasi Kitin dari Limbah Cangkang Udang Zaeni, Muhammad; Fuadah, Badrotul; Sudiana, I. N.
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Jurusan Fisika FMIPA UHO

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Abstract

A research about “Microwave Effect on the Chitin Deacetylation Process of Shrimp-Shell Waste (Panaeus merguensis) “ is done. This research aims to decrease the reaction time of acetyl group determination and to get glucosamine hydrochloride that fit the standard. In this research, NaOH 50% is used, while the radiation duration is varied. Microwave radion durations are under 30 minute i.e. 3,7,11,15 minutes with 450 watt power to examine the effectivity of microwave technology compared to conventional method. FTIR  (Fourier Transform Infrared)  test results show that the highest Deacetylation Degree (DD) of chitosan 62,72%, is reached at 15 minutes of microwave radiation duration, that equivalent with deacetylased chitosan by conventional method that is 61,78%. Chitosan then undergoes the making process of glucosamine hydrochloride by using HCl 37%. The characterization result show that glucosamine hydrochloride has a good solubility in water, melting point of 190ºC, FTIR spectrum of glucosamine hydrochloride shows  absorption bands that fit the standard glucosamine hydrochloride and XRD test result show that theb synthesized crystal still has a low crystalinity. Keyword: microwave, chitin, chitosan, deacetylation degree, glucosamine hydrochloride.
POROSITAS MIKROSTRUKTUR SILIKA KERAMIK HASIL EKSTRAKSI DARI LIMBAH SEKAM PADI YANG DISINTERING DENGAN MICROWAVE Endang S, Prima; Trisnawati, Trisnawati; Sudiana, I. N.
Jurnal Aplikasi Fisika Vol 13, No 2 (2017): JURNAL APLIKASI FISIKA
Publisher : Jurusan Fisika FMIPA UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (15.472 KB)

Abstract

An experiments have been conducted on the characterization of ceramic silica microstructures extracted from rice husks. The aim of this research is to observe the change of ceramic silica microstructure extracted from rice husk ash after sintered by using microwave. Rice husk ash first extracted using HCl 1M and NaOH 2M, then drying and molding. Ceramic silica is sintered by using microwave and electric furnace at temperature range 1000˚C-1600˚C. Characterization of ceramic silica using scanning electron microscope (SEM). The results of scanning electron microscope (SEM) show that in the sintering process using microwave the surface of silica ceramic sample is form solid granulars and  pores rapidly reduced. While the results of scanning electron microscope (SEM) using the furnace along with rising temperature, showing microstructure ceramic silica samples at each temperature is almost the same but slower pore reduction. Keywords: rice husk, extraction, sintering, microwave, imageJ software, microstructure. 

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