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Jurnal Penelitian Saintek
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Articles 6 Documents
Search results for , issue " Vol 15, No 1 (2010): April 2010" : 6 Documents clear
PENGUKURAN KERENTANAN LONGSOR LAHAN SEBAGAI UPAYA MlTIGASI BENCANA DI PERBUKITAN MENOREH Sugiharyanto, Sugiharyanto; Khotimah, Nurul
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
Publisher : Jurnal Penelitian Saintek

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Abstract

The objectives of this research are to: Investigating the level of landslide susceptibility and identifying the distribution of landslide   susceptibility locations in Menoreh Mountains area. This is the  explorative research. The subject of this research are Menoreh Mountains  area in Bagelen, and Bener districts Purworejo regency, in addition to Samigaluh District in Kulonprogo Regency. Land units  were chosen as the sample using the purposive area sampling technique.  Thirty land units were obtained by overlay maps of slope, geology,  and soil types. Data collecting  was conducted  with observation method and documentation  to be analyzed by qualitative deskriptif. Findings shown that (I) the level of landslide susceptibility  that is in four  categories in Samigaluh and Bener districts are low, medium, high, and very high.  While three categories were low, medium, and high clasified in Bagelen  district. The distributions of low landslide susceptibility covered about 46.500.527,08 m2 (2 land units in Samigaluh, 3 land units in Bener, and 3 land units in Bagelen). The medium categories covered about  104480073,8  m2 (l land units in Samigaluh,  4 land units in Bener, and 7 land units in Bagelen). High categories covered about 67734399,31 m2 (each of district is 2 land units). The very high categories covered about 12228602,01 m2 (2 land units for both, Samigaluh and Bener District).   Key words: landslide, susceptibility,  mitigation, hazard, Menoreh
PENGUJIAN ALAT PENGOLAH LIMBAH MINYAK GORENG MENJADI BIODIESEL SEBAGAI BAHAN BAKAR ALTERNATIF MOTOR DIESEL Widjanarko, Dwi; Abdurrahman, Abdurrahman; Hadromi, Hadromi
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The objectives of this research are to desain and to test the biodiesel processing  unit from waste cooking oil, to examine the characteristics  of processed  biodiesel, and to apply the biodiesel on diesel engine to ensure that there will not be a problem  on the tested diesel engine. This research is an experiment  research  carried out by several steps, designing waste cooking-biodiesel processing unit, examining the characteristics ofbiodiesel made, and applying the biodiesel on diesel  engine. The result showed that the biodtesel processing  unit that was  made could work well to produce biodiesel. The biodiesel characteristics are comparable with diesel oil and the biodiesel is applicable on diesel engine without any problems accured.   Keywords: biodiesel, waste cooking oil, alternative fuel, diesel engine
ADSORPSI NITROGEN DARI URIN DENGAN ZEOLIT Utomo, Pranjoto; Widjajanti, Endang; Budiasih, Kun Sri
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The aims of the research were to determine the nitrogen contained in human urine before and after applying zeolyte and to determine  the influence of MgO to nitrogen  contained in human urine. The determination of zeolyte adsorption capacity to nitrogen contained in human urine included 3 steps: activation of natural zeolyte, nitrogen adsorption, total nitrogen determination  by Kjedahl test. Zeolyte activation was done by soaking zeolyte into 0,1 M HCl,  HNO3,  and H2SO4 for 1 hour and calcinated for 4 hours at 400°C. The adsorption proses was done by adding inactivated and activated  zeolyte with and without MgO adding. The optimum mass of zeolyte was 3 grams. The  adsorption  capacities  of inactivated zeolytes without and with MgO adding were 0.007809% and 0.0102% per gram zeolyte, respectively. The adsorption capacities of activated zeolyte by HCl,  HNO3, dan H2S04 without MgO adding were 0.00604%, 0.00664% and 0.00917% per gram zeoliyte. The adsorption capacities  of activated zeolyte by HCl,  HN03,  dan H2S04 with MgO adding were 0.00839%, 0.0104%, dan  0.011% per gram zeolyte. The  activation  and MgO adding increased  the adsorption capacity of zeolyte to nitrogen contained in human urine.
AKTIVITAS EKSTRAK BUAH MAKASAR (Brucea Javanica L. Merr) TERHADAP RADIKAL ANION SUPEROKSIDA SECARA IN VIVO Widiyantoro, Ari; Wardoyo, Elvi R.P.; Sayekti, Endah
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

Activity  of scavengering  radical  anion superoxide  by extract of Makasar fruit  (Brucea javanica   L. Merr)  have  been  research  with  methods  of  inhibition  reduction  nitroblue tetrazolium,  by in vivo on rat  Wistar induction with aflatoxin. Results showed  there are inhihition  reduction  of  nitroblue  tetrazolium  by  methanol  extract,  methanol fraction, ethylacetate fraction,  methylen chloride fraction  and n-hexane fraction. Phytochemical test showed alkaloid, terpenoid, quinone, polyphenol and steroid.
TRANSISI FASA TITATNIUM OKSIDA MELALUI KONDENSASI EX-SITU HIDROGEN TITANAT TIPE STRUKTUR LEPIDOKSROSIT Sutrisno, Hari; Sunarto, Sunarto
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The objectives of the research are to study of the structure type of titanium dioxide (TiO2) obtained form the ex-situ condensation of hydrated hydrogen titanates with the structure type of lepidocrocite. Hydrated hydrogen titanates were obtained by ion exchabge of H+ for Cs+ in cesium titanates by 1 M HCl solution by Chimie Douce method. The results show that TiO2 (B), anatase, and anatase-rutile mixture were obtained heat treatment of hydrated hydrogen titanate at 100, 200, 300, 500, and 600oc respectively. The powders were characterized by X-rays diffractometer (XRD), High Resolution Scanning Electron Microscopy (HRSEM) and High Resolution Transmission Electron Microscopy (HRTEM). The research indicated that the protonic titanate, H0.54 Ti1.865 0.135O4 0.5H2O ( =vacancy), lost the interlayer water by being heated up to 200oC to produce a dehydrated phase, H0.54 Ti1.865 0.135O4. Above 300oC, the dehydrated phase completely transformed to TiO2(B) and anatase was obtained as pure phase at 600oC. The phase transformed as the following process: H0.54Ti1.865 0.135O4 0.5H2O à H0.54Ti1.865 0.135O4 0.25H2Oà H0.54Ti1.865 0.135O4 à TiO2(B) à TiO2-anatase.
PROTOTIPE PERANGKAT LUNAK SISTEM KENDALI ADAPTIF MENGGUNAKAN ALGORITMA PEMBELAJARAN PERCEPTRON Zakaria, Masduki
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

This aims of this research is to build and to make performance test a software prototpe of adaptive control system with perceptron learning algorithm. Needs analysis is performed to find an adaptive control system specifications are required, the result is a blue print software, after a modification of the learning algorithms are tailored to the programming language, the result is a flow chart design. Software implementation is based on the flow chart that was created by using a developed by research and development approach. The results showed that th group data in the analytical calculations with research data from a running program at every step in iteration, there was no sognificant difference between the description of data in two research groups. ub> 0{� sb`�5P8 ( =vacancy), lost the interlayer water by being heated up to 200oC to produce a dehydrated phase, H0.54 Ti1.865 0.135O4. Above 300oC, the dehydrated phase completely transformed to TiO2(B) and anatase was obtained as pure phase at 600oC. The phase transformed as the following process: H0.54Ti1.865 0.135O4 0.5H2O à H0.54Ti1.865 0.135O4 0.25H2Oà H0.54Ti1.865 0.135O4 à TiO2(B) à TiO2-anatase. 

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