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PERENGKAHAN PRODUK CAIR BATUBARA DENGAN KATALIS NI/ZEOLIT Suyati, Linda; Setiaji, Bambang; Triyono, Triyono
Jurnal Kimia Sains dan Aplikasi Vol 10, No 1 (2007): Volume 10 Issue 1 Year 2007
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (165.055 KB) | DOI: 10.14710/jksa.10.1.7-11

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Penelitian pirolisis tir batubara dilakukan dengan menggunakan metode alir termokopel dalam reactor. Temperatur reaktor konstan pada temperature 450oC-700oC untuk reaksi termal. Dan untuk reaksi katalitik dilakukan pada temperature 350oC-600oC. Berat katalis dan laju alir H2 adalah konstan. Hasil menunjukkan bahwa pada temperature tinggi reaksi termal pirolisis adalah gas, sedangkan dengan menggunakan katalis adalah kokas. Konversi dengan katalis Ni/Zeolit dibawah temperature 550oC lebih besar dibandingkan secara termal. Hasil cairan terbanyak pada temperatur 600oC hasil utama senyawa phenol pada reaksi katalitik.
KECENDERUNGAN DALAM IMPLEMENTASI OTONOMI DAERAH Setiaji, Bambang
UNISIA No 46/XXV/III/2002
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/unisia.vol25.iss46.art3

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OPTIMASI KONDISI FERMENTASI UNTUK PRODUKSI SELULOSA BAKTERI OLEH STRAIN SLK-1 DALAM MEDIA DASAR AIR KELAPA (OPTIMIZATION OF FERMENTATION CONDITIONS FOR THE PRODUCTION OF BACTERIAL CELLULOSE BY SLK-1 STRAIN IN COCONUT WATER BASED MEDIUM) Sarkono, Sarkono; Moeljopawiro, Sukarti; Setiaji, Bambang; Sembiring, Langkah
Prosiding Seminar Biologi Vol 9, No 1 (2012): Seminar Nasional IX Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

ABSTRAK   Tujuan penelitian ini adalah mengoptimasi kondisi fermentasi terbaik strain Bakteri Asam Asetat penghasil selulosa yaitu isolat SLK-1.  Strain ini diisolasi dari buah salak pada penelitian sebelumnya.  Hasil optimasi menunjukkan bahwa kondisi fermentasi optimum untuk pertumbuhan dan produksi selulosa pada isolat SLK-1  dicapai dengan sumber karbon gula pasir, sumber nitrogen ammonium sulfat, pH 7, suhu inkubasi 25°C dan metode fermentasi statis. Karakter struktur permukaan selulosa hasil fermentasi isolat SLK-1 dipengaruhi oleh metode fermentasi yang digunakan.  Metode fermentasi goyangan berpengaruh menurunkan produksi selulosa pada  isolat SLK-1 dan merubah struktur permukaan yaitu susunan mikrofibril lebih renggang dan membentuk gelembung.   Kata Kunci: bakteri asam asetat, optimasi, fermentasi, selulosa bakteri, penggoyangan
ANALISIS STRUKTUR MIKRO DAN STRUKTUR KRISTAL KARBON TEMPURUNG KELAPA DAN POLIVINIL ALKOHOL (PVA) PADA TEMPERATUR TINGGI Rampe, Meytij Jeanne; Setiaji, Bambang; Trisunaryanti, Wega; ., Triyono
CHEMISTRY PROGRESS Vol 7, No 2 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.2.2014.7470

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Have been done conducted by micro structure study and crystal structure of coconut shell of coconut carbon andof polivinil alcohol. This research studied using alcohol polivinil (PVA) as material for stimulating growth of carboncrystal structure. Method of pelarut and calsination, temperature sintering 1500 oC and time heating done byprocess technology. Method analyse SEM-EDS for the examination of micro structure and chemical compositionand also XRD for the examination of carbon product material crystal structure. Product characterized showparticle swampy forest which not yet uniform and structure of semi-kristalin.Telah dilakukan kajian struktur mikro dan struktur kristal dari karbon tempurung kelapa dan polivinil alcohol(PVA). Penelitian ini mempelajari penggunaan polivinil alkohol (PVA) sebagai bahan utnuk menstimulasipertumbuhan struktur kristal karbon. Metode pelarut dan kalsinasi, sintering temperatur 1500 oC dan lamapemanasan dilakukan pada teknologi proses. Metode analisis SEM-EDS untuk pengujian struktur mikro dankomposisi kimia serta XRD untuk pengujian struktur kristal material produk karbon. Karakter produk yangdihasilkan menunjukkan sebaran partikel yang belum seragam dan struktur semi-kristalin.
PEMBUATAN KATALIS PD-CE/γ –AL2O3 DAN UJI AKTIVITAS TERHADAP OKSIDASI METANA Suseno, Ahmad; Triyono, Triyono; Setiaji, Bambang
Jurnal Kimia Sains dan Aplikasi Vol 2, No 3 (1999): Volume 2 Issue 3 Year 1999
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7361.868 KB) | DOI: 10.14710/jksa.2.3.104-111

Abstract

Effects of Ce addition on Pt/? - Al2O3 catalysts preparation and their catalytic activity on oxidation of methane have been investigated. In this study, the catalysts were prepared by impregnating chloride salt solution of palladium and sulphate salt of cerium on ?-AI2O3 support. Characterization of catalysts was conducted by gas sorption method to determine surface area, pore radius and pore volume. The test of catalytic activity on oxidation of methane was carried out in a flow reactor system at a temperature range from 350°C to 600°C. Products of reaction were analysed by non-dispersive IR spectroscopy. It was observed that the surface area, pore radius and pore volume decrease with the addition of cerium. The results of oxidation process showed that Pd-Ce/?-Al2O3 catalyst can be used for oxidation of methane up to 90.62% conversion
EXPLOITING A BENEFIT OF COCONUT MILK SKIM IN COCONUT OIL PROCESS AS NATA DE COCO SUBSTRATE Setiaji, Bambang; Setyopratiwi, Ani; Cahyandaru, Nahar
Indonesian Journal of Chemistry Vol 2, No 3 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.21912

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A research to know influence of mixing concentration of coconut water and sucrose concentration to coconut milk skim as nata de coco substrate has been conducted. The variation was taken from mixing coconut water (0%, 25%, 35% and 50% and 100% as control) and the sucrose concentration (0.5%, 1%, 1.5% and 2%). Coconut milk skim boiled before used as substrat, yielded a coconut protein (blondo). The result of research showed that coconut milk skim can be used as nata de coco substrate with mixing coconut water and sucrose addition, mixing 50 % concentration coconut water representing optimum concentration. The content of crude fibre nata was yielded by higher concentration of sucrose, while mixing concentration coconut water do not influence crude fibre content.
SOLVATION STRUCTURE DETERMINATION OF NI2+ ION IN WATER BY MEANS OF MONTE CARLO METHOD Arindah, Tutik; Setiaji, Bambang; Pranowo, Harno Dwi
Indonesian Journal of Chemistry Vol 2, No 3 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.21915

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Determination of solvation structure of Ni2+ ion in water has been achieved using Monte Carlo method using canonic assemble (NVT constant). Simulation of a Ni2+ ion in 215 H2O molecules has been done under NVT condition (298.15 K). The results showed that number of H2O molecules surround Ni2+ ion were 8 molecules in first shell and 17 molecules in second shell, interaction energy of Ni2+-H2O in first shell was -68.7 kcal/mol and in second shell was -9.8 kcal/mol, and there were two angles of O-Ni2+-O, i.e. 74o and 142o. According to those results, the solvation structure of Ni2+ ion in water was cubic antisymetric.
The Chemical Composition and Physical Properties of the Light and Heavy Tar Resulted from Coconut Shell Pyrolysis Hasanah, Uswatun; Setiaji, Bambang; Triyono, Triyono; Anwar, Chairil
The Journal of Pure and Applied Chemistry Research Vol 1, No 1 (2012)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.514 KB) | DOI: 10.21776/ub.jpacr.2012.001.01.102

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The tar resulted from pyrolysis of coconut shell is a waste. It is important to be clarified their chemical composition and physical properties in order to find out their feasibility as source of a fuel. This research was resulted two immiscible organic fractions, and these were further determined their physical properties such as water composition by using ASTM D-95 methods, ash composition (ASTM D-482), flash point C.O.C (ASTM D-92), kinematics of viscosity (ASTM D-445), and caloric valued using bomb calorimetric. In addition, tar composition was determined by gas chromatography-mass spectrometry (GCMS). The result provided oil which was categorized as light and heavy bio-oils. The light bio-oil has specific gravity 0.99, ash content 0.01%, kinematics viscosity 25.5 cSt, flash point <27 oC, pH 3 and heating value 10304 kcal/kg. On the other hand, heavy bio- oils gave specific gravity 1.13, ash 0.46%, kinematics viscosity 185 cSt, flash point 134 oC, pH 2.5 and heating value 6210 kcal/kg. Moreover, the light bio-oil contained 79 compounds which was composed of phenol 16.4%, hydrocarbon 12.4%, phenolic 27.6%, other oxygenated compounds 53.6%, and acetic acid 3%, meanwhile the heavy bio-oils contained of 18 compounds which was consisted of phenol 31.2%, lauric acid 6.0%, phenolic 27.6%, and other oxygenated compounds 35.3%, respectively. With this result, it was clarify that these bio-oils could not be used directly as a fuel for motor nor diesel machinery.
PERILAKU MEROKOK MASYARAKAT DI KECAMATAN CIAMPEA KABUPATEN BOGOR JAWA BARAT Hidayati, Hidayati; Setiaji, Bambang
ARKESMAS [Arsip Kesehatan Masyarakat] Vol 2 No 2 (2017)
Publisher : UHAMKA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/arkesmas.v2i2.2496

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Pada tahun 2016, Provinsi Jawa Barat dipilih oleh Kementerian Kesehatan RI menjadi salah satu darisembilan provinsi untuk program prioritas Indonesia Sehat dengan Pendekatan Keluarga (PIS-PK).Dari 12 indikator PIS-PK, indikator ke-9, yaitu anggota keluarga tidak ada yang merokok, merupakanindikator cakupan terendah di Kecamatan Ciampea Kabupaten Bogor Jawa Barat, yaitu sebesar 25,58%.Melihat hal tersebut, penelitian ini dilakukan untuk menggali lebih dalam perilaku merokok di KecamatanCiampea. Penelitian ini menggunakan desain analisis kualitatif dan dilakukan pada bulan Oktober danNovember 2016. Dengan cara purposive sampling, informan yang terpilih adalah 4 orang anggota rumahtangga (ART), 6 orang tokoh masyarakat, 5 orang kader kesehatan, 3 orang bidan desa, 2 orang petugasPuskesmas, dan 2 orang Kepala Puskesmas. Data dikumpulkan dengan metode wawancara mendalam dandiskusi kelompok terarah (Foccus Group Discussion/FGD). Analisis data dalam penelitian ini terdiri darireduksi data, penyajian data, penyusunan kesimpulan. Merokok merupakan hal yang lumrah dilakukandi Kecamatan Ciampea. Sebagian besar dari mereka merupakan perokok sosial. Mereka merokok ketikasedang berkumpul dengan lingkungan sekitarnya. Walaupun demikian, mereka telah mengetahui bahwaterdapat peraturan terkait dengan larangan merokok.Warga Kecamatan Ciampea juga telah menyadaribahwa merokok memiliki dampak buruk bagi kesehatan seperti terserang penyakit terkait pernapasan. Disamping itu, mereka pun memahami bahwa merokok membawa pengaruh buruk bagi keadaan ekonomimereka. Merokok merupakan kebiasaan sehari-hari warga di Kecamatan Ciampea walaupun mereka telahmengetahui larangan untuk merokok dan dampak buruknya.
PENGANGGURAN SEBAGAI PERHATIAN UTAMA EKONOMI MUHAMMADIYAH Setiaji, Bambang
Tajdida Vol 13, No 1 (2015): Juni
Publisher : Muhammadiyah University Press

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Islamic teachings emphasize the reduction of unemployment in religious terminology is called the needy, the people who do not posses income. The indigent are entitled to charity or public funds from the government.Reduction of unemployment caused or inclusive of other economic targets such as the flow of revenue to the public and simultaneously reduce poverty, and reduce social problems. It is a concern of the Quran and is expressed in many verses. Alleviation of poverty in Islam, not based on charity, but based on the work (full employment).The complex problem of unemployment in this country should be a priority in religious movements, particularly Muhammadiyah. Because without getting a job and eventually dignity of ones faith itself would be problematic. It can directly reproduce the movement of employers or improve competence, quality, and skills of learners.