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INDONESIA
Teknologi Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 01261533     EISSN : 23031913     DOI : -
Core Subject : Science,
Computer Science & IT
JTI is a journal in the Departement of Engineering Sciences - Indonesian Institute of Sciences (LIPI). JTI has policy to publish a new and original research paper or a review paper in The scope of Technology. JTI publishes two issues per year. The journal has been registered with printed-ISSN number as 0126-1533 and electronic ISSN number as 2303-1913.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue " Vol 39, No 1 (2016)" : 7 Documents clear
OPTIMIZATION OF CELLULASE PRODUCTION FROM MARINE BACTERIUM BACILLUS CEREUS C9 BY SUBMERGED FERMENTATION -, Yopi -; Rahmani, Nanik
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.001 KB) | DOI: 10.14203/jti.v39i1.238

Abstract

Cellulase is one of industrial important enzymes in conversion of lignocellulosic biomass into valuable products such as bioethanol produced by fermentation. Successful bioconversion of cellulosic biomass mainly depends on the nature of cellulose sources of cellulolytic enzyme and optimal conditions for production of enzymes. An extracellular cellulase production by marine bacterium Bacillus cereus C9 was optimized by using submerged fermentation (SMF) on commercial substrate (CMC). The fermentation condition such as substrate concentration, pH medium, temperature fermentation, and carbon source were optimized. The optimum condition found for cellulase production were substrate concentration 2.0% (b/v), pH medium 5, temperature fermentation 30C, and glucose as a carbon source with activity 4.42 U ml-1on 96 hours of fermentation.
Fabrication of the Soft Magnet using the Mixture of BaFe12O19 - Al2O3 at different Sintering Temperature ginting, masno; Hia, Taufik Hidayat; N, Nasruddin M; Sebayang, Perdamean
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.054 KB) | DOI: 10.14203/jti.v39i1.269

Abstract

Barium Hexaferrite (BaFe12O19) magnet has been made by adding Al2O3 using metallurgical powder method.Al2O3 with different composition such as 0, 40, 50 and 60 (% weight) was added to Barium Hexaferrite (BaFe12O19),and then sintered at temperatures of 900, 950, 1,000, 1,050, and 1,1000C and each sintering was hold for two hours.From the experiment it is found that some of Al2O3 reacts with BaFe12O19 and results in one new phase of FeAl2O3.Meanwhile, the morphology of the sample is found relatively homogeneous with the rod type particle size whichis less than 1 ?m. The best sample was obtained at 1,1000C sintering temperature, which gives the value of bulkdensity 4.34 g/cm3, porosity 21.98%, and flux density 72.95 Gauss.
PREPARATION OF DFA III FROM DAHLIA (DAHLIA sp.) TUBERS BY NONOMURAEA sp. INULIN FRUCTOTRANSFERASE pudjiraharti, sri
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v39i1.252

Abstract

A functional oligosaccharide Difructose anhydride III (DFA III) can be made enzymatically from inulin. Inthis research, tubers of Dahlia plant (Dahlia sp.), which is known as one of the sources of inulin, was processedinto chips form and utilized for DFA III preparation using Nonomuraea sp. Inulin fructotransferase (IFTase). Priorto drying process, Dahlia tubers were blanched first at different blanching times (5, 10, 15, 20, and 25 minutes) tofind out the optimum time to produce white and clear chips. To study the influence of IFTase concentrations andreaction time on DFA III production, 10 g of Dahlia chips were reacted with different concentrations of enzyme35, 70, 140, 210, 280 U in 200 ml reaction mixture and incubated at different periods of time (3, 6, 9 and 12hours). DFA III produced was measured by High Performance Liquid Chromatography (HPLC) method. The resultindicated that blanching in boiling water for 15 minutes resulted in chips with clear and white color. It was alsoobserved, the higher the amount of enzyme used and the longer the incubation period, the higher the concentrationof DFA III resulted. Statistical analysis using single-factor Anova and t-test for P=0.05 showed that reaction forDFA III production using enzyme concentration of 35 U was significantly different from that using 140, 120, and280 U; reaction using enzyme concentration of 210 was significantly different from that of 280 U. However, DFAIII production using enzyme concentration of 35 U was more effective than using the higher one. DFA III of 0.83g was produced using enzyme amount of 35 U, while 1.45 g DFA III produced using 280 U can increase DFA IIIpercentage up to 73.86%.
HYDROTHERMAL LIQUEFACTION OF BLACK LIQUOR INTO PLATFORM CHEMICALS Mansur, Dieni; Simanungkalit, Sabar Pangihutan; Rinaldi, Nino; Abimanyu, Haznan
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.054 KB) | DOI: 10.14203/jti.v39i1.245

Abstract

Currently, much attention is devoted to produce bioethanol based on lignocellulosic materials for alternativefuels. Production of bioethanol from lignocellulosic generates black liquor as a waste during the pretreatmentprocess. The black liquor has a potential to produce platform chemicals. Conversion of black liquor into platformchemicals was carried out by hydrothermal liquefaction by involving water as reaction medium at 200275 C.Through the hydrothermal process combined with water at high temperature, catalytic role could be taken over bysodium sulfate. Increase in temperature up to 275C, activity of water combined with sodium sulfate also increasedin decomposition of block chemicals containing in the black liquor. The black liquor was converted into oxygenatedcompounds, such asphenol, propylene oxide, butyrolactone, and quaiacol. The chemicals were recovered as23, 16, 11 and 8 mol%, respectively.
EVALUATION OF THE WOOD QUALITY OF PLATINUM TEAK WOOD Adi, Danang Sudarwoko
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v39i1.241

Abstract

The quality of platinum teak wood (Tectona grandis), which is developed by Indonesian Institute of Sciences(LIPI) through tissue culture method was observed in this study. The aims were to asses and evaluate the woodquality, i.e. physical and mechanical properties, and also to investigate the potential use as well as the challengeof this wood in the future compared to others wood, especially with the conventional ones. Two-year-old platinumteak wood was analyzed for physical properties, while five-year-old platinum weak was analyzed for physicaland mechanical properties. Both of these woods were planted in Cibinong, Bogor. Ten-year-old teak wood fromcommunity forest in Serpong, Tangerang and secondary data from various conventional teak woods from variousregions were used as comparisons. The results show that physical properties of 2-and 5-year-old platinum teakwood are better than 10 years teak wood from community forest. The basic densities of 2-and 5-year-old platinumteak wood are 0.50 and 0.53 g/cm3, respectively, while ten-year-old community forest teak wood is 0.42 g/cm3. Thedimensional stability of 5 years platinum teak wood is low and similar to ten-year-old community and progeny testteak wood, which the value of tangential and radial ratio (TR ratio) of this wood is 2.16. TR ratio of two-year-oldplatinum teak wood is ~1. The MOR of five-year-old platinum teak wood is 919.79 kg/cm2. This value is almostsimilar to 2030-year-old conventional teak wood from East Java. Almost all of wood qualities depend on age ofthe trees. Therefore, it is predicted that platinum teak wood has a good potency to be used for structural applicationsas well as for furniture.
MULTIMEDIA APPLICATIONS FOR DISASTER RISK MANAGEMENT Rezaldi, Muhammad Yudhi; Perdananugraha, Gonang May
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.054 KB) | DOI: 10.14203/jti.v39i1.185

Abstract

Nowadays multimedia learning is not only for showing/teaching some simple daily activities, but also forshowing how to do self-preventive measures in dangerous situations due to natural disaster. This paper explainsthe development of multimedia applications for tsunami disaster risk management, and also to test this mediaslevel of effectiveness in informing such dangerous tsunami. Some studies also showed that multimedia learningwas more effective than traditional one, and will be more optimized if both methods were combined. Based on ourresearch, the media that was most properly used to educate about tsunami natural disaster especially for children inMount. Krakatau was multimedia applications in the form of film/movie. To do so, we distributed questionnaire withteenagers (junior and senior high school) as the target audience. In developing animated films there were severalsteps, each of these steps used different software. Modeling and rendering steps used 3Ds Max software, editingstep used Adobe After FX software, and composite step used Adobe Premier software.
PRELIMINARY STUDY ON PHOTONIC CRYSTAL-BASED EUPHOLUS CHEVROLATI BEETLE WING FOR REFRACTIVE INDEX SENSOR Hidayah, Affi Nur
Teknologi Indonesia Vol 39, No 1 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v39i1.246

Abstract

Micro and nanostructures from nature are very interesting for research and applicable technologies. One of theinteresting structures is beetle wing since they have unique optical properties. In this work, we have investigatedmorphology of nano and microstructure of beetle wing from Eupholus chevrolati species. We found that Eupholuschevrolati beetle wing species has perfect arrangement of nanostructure, known as photonic crystal structure. Thiskind of structure is very interesting due to its high reflectance at particular wavelength corresponding to its latticestructure. The result of SEM revealed three dimensional structure of photonic crystal structure exhibited insideEupholus chevrolati beetle wing species. Beetle wings have rigid and solid texture, so that is applicable for opticaldevices applications. Reflectance spectrum of beetle wings showed a distinctive reflectance peak, which indicatesphotonic crystal property. We observed clear reflectance peak position difference, about 20 nm wavelength, betweenbeetle wings in air and water. This difference corresponds to refractive index difference between air and water.Further development is still required to make beetle wings as refractive index sensor.

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