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Jurnal ILMU DASAR
Published by Universitas Jember
ISSN : 14115735     EISSN : 24425613     DOI : -
Core Subject : Science, Education,
Jurnal ILMU DASAR (JID) adalah jurnal ilmiah yang melingkupi bidang matematika, fisika, kimia dan biologi. Naskah yang diusulkan untuk diterbitkan Jurnal Ilmu Dasar adalah naskah yang belum pernah diterbitkan dan atau tidak sedang dipertimbangkan penerbitannya di majalah lain. Jurnal Ilmu Dasar menerima tulisan hasil penelitian dasar (bukan aplikasi) untuk bidang matematika, kimia, fisika, dan biologi. Naskah ilmiah ditulis dalam bahasa Indonesia atau dalam bahasa Inggris yang baik. Secara lebih detail dapat dilihat dari pedoman penulisan.
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Articles 10 Documents
Search results for , issue "Vol 14 No 1 (2013)" : 10 Documents clear
Efficiency Calculation Analysis of A-Si:H Solar Cells for Determination of Optimum Filament Temperature in Material Deposition Purwandari, Endhah; Winata, Toto
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (726.416 KB) | DOI: 10.19184/jid.v14i1.478

Abstract

Solar cell efficiency as a function of the energy gap has been simulated by calculating the output current characteristics of the devices based on the distribution of charge carriers, obtained from the solution of the Poisson equation and the Continuity equation. The hydrogenated amorphous silicon (a-Si:H) based solar cell, has simulated in the form of one-dimensional single junction p/i/n. The junction structure of a-SiC:H/a-Si:H/a-Si:H designed have the thickness of 0,015 μm/0,550 μm/0,030 μm, respectively. For simulation, the energy gap has considered constant in the p and n layers, whereas the i layer varies according to the empirical data of energy gap obtained from the deposition parameters of filament temperature. Simulations performed using the finite element method supported by FEMLAB software. Based on simulation results, obtained the highest efficiency of 9.35% corresponds to the lowest energy gap data of 1.706 eV for layer i. This appropriates to the filament temperature of 800oC and subsequently used as the optimum deposition parameters of the material. Keyword: Energy gap, efficiency, FEM, solar cell, hydrogenated amorphous silicon
Design of Gas-Cooled Fast Reactor 600MWth with Natural Uranium As Fuel Circle Input Ariani, Menik; Monado, Fiber; Su’ud, Zaki
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.87 KB) | DOI: 10.19184/jid.v14i1.476

Abstract

This article presents the conceptual design of gas-cooled fast reactor (helium), the small size of the long-lived 600 MWth. Early stages of the design is to determine the geometry of the terrace, the value of the volume fraction and the mass fraction of fuel, cladding and coolant structure to calculate the parameters of reactivity, burnup, power distribution and density changes nuclides U238 and Pu239. The calculation is done using SRAC-CITATION code. SRAC code with JENDL-3.2 Data nuclides produced macroscopic cross section values for the eight energy group. Multi-group numerical solution of diffusion equations for 2-D geometry terrace RZ performed by CITATION code. The study results showed that the scheme Modified CANDLE, thermal power output is 600 MWth, with a fuel cycle for 10 years. This reactor has the advantage of requiring only the input of natural uranium in the fuel cycle, without the need for enrichment processes that affect the economic value. Keywords : Reactor, natural uranium, modified candle, burnup
Design of Multi Syringe Pump for Flow System Analysis Mulyono, Tri; Asnawati, Asnawati; Faruq, Umarul
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.372 KB) | DOI: 10.19184/jid.v14i1.477

Abstract

The aims of this work were to research: design of the multi syringe pumps, volume consistency of ISAB and the correlation of the PWM to the flow rate of carrier. Pump speed was set by PWM. Controlling the pump speed and time were performed with a computer using Labview software. It was found that based on the time variation of time then the volume of ISAB has a consistency of the injected volume with Kv 0.25% to 2.53% and the rate of carrier based on multi syringe velocity have a good correlation with the regression value of 0.998 and the value of Kv 0.27% to 1.2%. Keywords : Multi syringe pump, MSFIA methods, PWM
Antifeedant Activity from Leaves Extract of Aglaia ganggo Miq on Spodoptera litura Purwatiningsih, Purwatiningsih; Winata, I Nyoman Adi
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.851 KB) | DOI: 10.19184/jid.v14i1.475

Abstract

The different fraction extracts (viz methanol, dichlorometana, n-hexane, ethylacetate, and aceton) obtained from leaves of Aglaia ganggo Miq were investigated for antifeedant activity against Spodoptera litura. All extract fractions showed antifeedant activity with aceton fraction exhibited the highest antifeedant activity at 1 ppm concentration. Only hexane fraction showed a dose dependent concentration while the other fractions exhibited the opposite respond.Keywords : Antifeedant, Aglaia ganggo, extract, fraction
Photodegradation Of Diazinon Pesticide In Suspension Of TiO2 Ramadhan, La Ode Ahmad Nur; Amiruddin, Amiruddin
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (719.98 KB) | DOI: 10.19184/jid.v14i1.473

Abstract

Study on photodegradation of diazinon pesticide in suspension of TiO2 under ultra violet (UV) illumination was conducted. The aims of study are to determine the effective mass of titanium dioxide (TiO2), the effect of catalyst in initial concentration, the half time, the rate constant, and the rate of degradation reaction. Experimental photocatalytic reactor model was designed and constructed as suspension reactor. Determination of the effective mass of TiO2, the concentration of diazinon residu was performed by HPLC . The concentrations of illuminated diazinon solution were colected as various effective mass of TiO2 and expressed as the concentration vs the mass of TiO2. The mass of TiO2 in minimum diazinon concentration was a the effective mass. The concentration of illuminated diazinon and illumination time relationships was expressed in the graph as ln C/C0 = - k t and regarded as a pseudo first-order. The half time, the rate constant, and the degradation rate was analyzed from the graph. The results show that the photocatalytic degradation of pesticide diazinon by using TiO2 under UV illumination was run effectively in the mass of 12.5 mg for the diazinon concentration of 25 mg/l. The decreasing of initial concentration of diazinon is 90.4 % in 120 minutes. The half time, the rate constant, and the degradation rate are 36,869 minute, 0.0188 /minute, and 0,470 mg/l minute, respectively. Keywords : Kinetic, degradation, diazinon, TiO2
Preparation of Reference Material for Trigonelline Determination Inside of Green Coffee Beans Using HPTLC Muflihah, Yeni M.; Buchari, Buchari
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (443.814 KB) | DOI: 10.19184/jid.v14i1.482

Abstract

Preliminary study of preparation reference material for trigonelline determination in green coffee beans have been performed by HPTLC method. Physical characterization performed on green coffee beans include the determination of moisture content, ash content and metal content. Water content values obtained on average 6.4% (%RSD 4.8) and ash content 3.9% (%RSD 16.2). Metal determination (Cu, Zn, Fe) with atomic absorption spectrometry method found Cu 9.4 (mg/kg), Zn 12,0 (mg/kg) and Fe 64.0 (mg /kg). Sonication as extraction method using methanol solvent for 30 minutes and separation method HPTLC on aluminum plates coated with silica gel 60 F254. Eluent used was mixture of n-propanol: methanol: water (4:1:4, v/v/v) with elution length 8 cm. Linear regression obtained in concentration range 200-1200 ng spot-1 with R2 = 0.9857. Detection limits obtained 140.7 ng and 468.9 ng for quantitation limit. Repeatability was achieved from 800 ng spot-1 (% RSD 13.8). Keywords : Reference material, Trigonelline, green coffee, HPTLC
Cellulose Acetate Membranes characters Due To Additions Additive Monosodium Glutamate (MSG) Indarti, Dwi; Winata, I Nyoman Adi; Novianti, Heny Yunita
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (607.762 KB) | DOI: 10.19184/jid.v14i1.479

Abstract

This study purposed to determine the effect of MSG on the character of cellulose acetate membranes. This membrane preparation using phase inversion technique. The results showed that the higher the concentration of MSG, which is the character of membrane permeability coefficients and higher water flux, whereas for the character of the membrane density test and 100-200 kDa dextran rejection further down. To test the FTIR proved that there are no additives or solvents are trapped in a membrane. Keywords : Cellulose Acetate, phase inversion, MSG, FTIR  
Design of Supercritical Water Reactor with Thorium Fuel Cell Utami, Rina; Yulianti, Yanti
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (284.25 KB) | DOI: 10.19184/jid.v14i1.474

Abstract

The research of desain of super critical water reactor (SCWR) thorium fuel has been done. The objective of this research is to obtain the design with high thermal power and inherent safety features. The analyzed parameters were:corefuelenrichment,reactorsize,criticality,andpowerdensitydistribution.Acorecalculationof x,y,z was achieved by CITATION code. Fuel composition and core configurations in critical condition were calculated by variation of fuel enrichment, reactor size and configuration of the fuel in the core. SCWR used thorium as fuel, stainless steel as cladding, light water as moderator and coolant as well. This research obtained critical core design that is size x = 85 cm, y = 85 cm and z = 180 cm. The critical condition can be achieved when the inner fuel loaded about 2.23% fuel enrichment and outer fuel 1.5% fuel encrichmant. The design produced 1000 MW thermal power, the maximum power density is 625.675 Watts /cc and k-effective value is 1.000274. Thereactorcoreinthisresearchfulfillstheinherentsafetystandardintermofneutronicaspect. Keywords : Core design, SCWR, thorium, power density, passive safety
Polysulfone Membrane with UV-Photografting Technique and it Application at Soya Milk Filtration Processing Piluharto, Bambang; Sjaifullah, Achmad; Rahmawati, Istiqomah; Maryanto, Maryanto
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.36 KB) | DOI: 10.19184/jid.v14i1.480

Abstract

In the separation process of solution containing protein, interaction between membrane surface and protein can cause fouling irreversibely. So, efficiency of filtration process will decline. In this research, to improve the effeciency of filtration was done by modification of membrane using UV-photografting technique. Acrylic acid had been introduced topolysulphone membrane via this technique. The hydrophylic membrane was obtained. The membrane performance was evaluated in soymilk fouling test. The first step of research had obtained PSF membrane optimation about PSF 18%. In second step, the research was focused on the modification and characterization of PSF membrane by UV-Fotografting tehchnique. In this technique, monomer concentration and radiation time was used as variable. As the result, PSF membrane had been modificated succesfully by UV- photografting tehchnique with optimum condition in 15 minutes time radiation and concentration of acrylic acid 5%. Performance of modified membranes (flux and permselectivity) were better than unmodified membranes. The fouling test showed that the modified membranes have reduced fouling degree significantly. Keywords : Ultrafiltration membrane, UV-photografting, flux and permselectivity, fouling
Amperometric biosensor for glucose detection based-on immobilisation of glucose oxidase in acetic cellulose membrane using ferrocene as mediator Asnawati, Asnawati; Indarti, Dwi; Mulyono, Tri; Kesuma B, Gembong
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1038.725 KB) | DOI: 10.19184/jid.v14i1.481

Abstract

The study reported the development of glucose ampherometric biosensor based on immobilization of glucose oxidase on cellulose acetate membrane with ferrocene as a mediator. Biosensor was designed with model Fc, GOx, CP / GOx / CA where ferrocene and the enzyme glucose oxidase on carbon paste in immobilizatin on the electrode body in the form of glass tubes and in other parts of the enzyme glucose oxidase in immobilizatin on cellulose acetate membrane with adsorption techniques are placed in electrode tip by using the o-ring. The presence of enzymes immobilization was determined quantitatively by enzyme immobilization was Km value. The results showed the composition of acetone-water in the optimum coagulation bath is 0:100% and 0,0008 g of Optimum ferrocene. Biosensor for measuring glucose in the area amperometri 0,1 to 3 mM with regression coefficient of 0,996, the detection limit of 0,01 mM, sensitivity of 0,989 μA / mM, the reproducibility of 0,07 to 0,3% and lifetime of 1 day. Keywords : Biosensor; glucose oxidase ; acetic cellulose; Ferrocene: Ampherometric.

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