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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 17 No 1 (2016)" : 10 Documents clear
RETRACTION: [Analgesic Activity .......... Test Method] Tamayanti, Wahyu Dewi; Widharna, Ratna Megawati; Caroline, Catherine; Soekarjo, Bambang
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (222.421 KB)

Abstract

Penarikan artikel ini dilakukan berdasarkan permintaan dari penulis (WDT) dan pertimbangan dari tim redaksi JID mengingat telah terjadi double submission.
Antioxidant Activity Study And Α-glucosidase Inhibitor Phenolic Leaf Extract Bungur (Lagerstroemia speciosa) From Meru National Park Betiri Rochman, Jainur; Siswoyo, Tri Agus; Ratnadewi, A.A. Istri
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.651 KB) | DOI: 10.19184/jid.v17i1.2672

Abstract

Study activities phenolic extract of bungur leaf as an antioxidant and inhibitor for the enzyme α-glucosidase was performed by spectrophotometric method. The extraction was carried out by three solvents with different polarity level in order to get three types of extracts namely hexane extract Bungur (HB), ethyl acetate extract Bungur (EAB), and the methanol extract Bungur (MB). The units, used in the analysis, is the total phenolic that standardized in gallic acid. The antioxidant activity of phenolic extracts Bungur leaf can be seen from its ability to reduce free radicals through the damping test DPPH radical, superoxide anion, and hydroxyl. Potential extract phenolic leaf Bungur as an inhibitor of α-glucosidase were analyzed by inhibition of α-glucosidase, but in this study also tested the inhibition of the enzyme α-amylase because both of these enzymes worked on the digestive system and hydrolyze carbohydrates. The results generally showed that the methanol extract of leaves Bungur potential as antioxidants that compared with standard vitamin C. In addition, it had as well as potential for inhibitors of α-glucosidase and α-amylase that compared akarbosa standard, which is expected to be a natural antidiabetic agent.Keywords: phenolic, bungur, antioxidant, inhibitor, α-amilase, α-glukosidase 
Potential of Waste as Raw Silk Worm Biodegradable Surfactant Fatarina P, Ery; Kasmiyatun, Mega; Mulyaningsih, MF. Sri; Silva, T. Da
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.91 KB) | DOI: 10.19184/jid.v17i1.2671

Abstract

Silkworm pupa is byproducts of silkworm farms are not fully utilized. This study aims to assess the potential silkworm waste as a raw material surfactant "biodegradable". Silk pupa oil has 43.70% triglyceride. The characterisation by the spectra FTIR showed the degradation results in wavelength 1050-1300 cm-1 and 1690-1760 cm-1 indicated the consecutive C‒O and C=O group of alcohol/ether/carboxylic acids/esters, and the wave number 2500-2700 cm-1 indicated the presence of O‒H groups of the carboxylic acid with hydrogen bonds. GC-MS analysis showed the components of palmitic acid β-monogliseride, α-monopalmitin, palmitic chloride acid, oleic acid, linoleic acid chloride. FTIR spectra degradation products Mono-diglyceride provide distinctive peaks that appear at wavelength 1041.56 cm-1 and 3659.61 cm-1 that showed group C-OH and OH, respectively. The performance test results of surfactant to the benzene-water system showed no effect of surfactant that is as an emulsifier. Silk pupa oil contains components that can be converted into a biodegradable surfactant. Keywords: silkworm pupa, surfactant, glycerolysis, monoglyceride 
Simulation of Formation of Icosahedral Structure in Solid-Liquid-Solid Phase Change Using Molecular Dynamics Methods Hauwali, Nikodemus Umbu Janga; Arkundato, Artoto; Rohman, Lutfi
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.395 KB) | DOI: 10.19184/jid.v17i1.2661

Abstract

It has successfully conducted research to study the structure of the icosahedral formation in the event of change of the solid phase - liquid-solid using molecular dynamics method . The result showed that the percentage of the maximum icosahedral structure is obtained when the simulation is run at the start of the cooling temperature of 2875 K at a rate of temperature decrease of 0.064 K /step and at the beginning of the cooling temperature of 3000 K at a rate of temperature decrease 0.12 K/step. While icosahedral minimum percentage obtained when the simulation is run at a temperature of 2750 K with the initial cooling rate of temperature decrease of 0.069 K/step. Based on these results we can conclude that there is a relationship between the initial temperature of the cooling and the rate of temperature decrease of the icosahedral structure is formed. Keywords: Icosahedral, phase change, molecular dynamics
Synthesis of precipitated Calcium Carbonate (PCC) From Lime Rock Nature Methods Caustic Soda (Studies Concentration HNO3) Azkiya, Noor Isnaini; Prasetia, Fanny; Putri, Elsa Desyta; Rosiana, Anggita; Wardhani, Sri
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.887 KB) | DOI: 10.19184/jid.v17i1.2670

Abstract

The limestones was abundant in Tuban, East Java and have high calcium mineral content. Nevertheless, in the economic value, limestone have low price. Aim the research is prepare  Precipitated Calcium Carbonate (PCC) by caustic soda method. In this method, calcium  was dissolved in HNO3 with different concentration (2, 4,6, 8 M). The Filtrate obtained then was added by Na2CO3 1 M to get PCC. As the results, The white PCC obtained with the highest rendement is 64,7% when added HNO3 6M. Analysis of functional group by FTIR show that there were strong absorption in the 844,76; 912,27 dan 1411,40 cm-1 that indicated carbonate group. Analysis of Cristallinity by XRD show that there were the peak characteristic of 2 on 29,50˚; 36,07˚ dan 39,50˚that representative calcite structure. SEM-EDX Analysis show that PCC have a mixing structure of calcite and vaterite.   Keywords: limestone, PCC, caustic soda 
Identification and Characterisation of “Black Sticky Rice” (Oriza Sativa Glutinosa) as Photosensitizer in Development of Dye Sensitized Solar Cells (DSSC) Supriyanto, Agus; Prasada, Ashari Bayu; Cari, Cari; Fadli, Ulfa Mahfudli
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (444.254 KB) | DOI: 10.19184/jid.v17i1.2662

Abstract

It has successfully conducted a research to identify and characterize extract of black sticky rice  (Oryza Sativa Glutinosa) as photosensitizers in making of Dye Sensitized Solar Cells (DSSC). Samples were made in the sandwich structure of couple of working electrode and counter electrode. The extraction process of dye in the black sticky rice was stirred for 1 hour and then allowed to stand for 24 hours. Identification of samples using FTIR (Fourier Transform Infra-Red) to determine the chemical bond formed in the sample. Test the absorbance of the sample using UV-Visible Spectrophotometer Lambda 25 test and characterization of current and voltage (I-V) using a Keithley 2602A. The results showed maximum absorbance black rice extract appears in two peaks namely at = 324 nm and = 477 nm. While the I-V curve measurements indicate the efficiency of the resulting large black rice extract was 0.028% on a 12-hour soaking period and 0,032% in 24 hours soaking time. These results indicate that longer soaking could increase the efficiency of the resulting value.Keywords: Ketan Hitam (Oriza Sativa Glutinosa), DSSC,FTIR, UV-Vis, Keithley
Time-Depth Curve Evaluation Method for Conversion Time to Depth at Penobscot Field, Nova-Scotia, Canada Azizah, Fitri Rizqi; Hiskiawan, Puguh; Hartanto, Sri
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (377.509 KB) | DOI: 10.19184/jid.v17i1.2663

Abstract

Oil and natural gas as a fossil fuel that is essential for human civilization, and included in nonrenewable energy, making this energy source is not easy for updated availability. So that it is necessary for exploration and exploitation reliable implementation. Seismic exploration becomes the method most widely applied in the oil, in particular reflection seismic exploration. Data wells (depth domain) and seismic data (time domain) of reflection seismic survey provides information wellbore within the timescale. As for the good interpretation needed information about the state of the earth and is able to accurately describe the actual situation (scale depth). Conversion time domain into the depth domain into things that need to be done in generating qualified exploration map. Method of time-depth curve to be the method most preferred by the geophysical interpreter, in addition to a fairly short turnaround times, also do not require a large budget. Through data information check-shot consisting of the well data and seismic data, which is then exchanged plotted, forming a curve time-depth curve, has been able to produce a map domain depth fairly reliable based on the validation value obtained in the range of 54 - 176m difference compared to the time domain maps previously generated.Keywords: Energy nonrenewable, survei seismik, peta domain waktu, peta domain kedalaman, time-depth curve
Synthesis zeolitic Imidazolate Framework-8 (Zif-8) In Solvothermal: The Effect Comparison of Metal-Ligand Nadjib, Muhammad; Ediati, Ratna; Sulistiyo, Yudi Aris; Nadifah, Lutfiatun
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.748 KB) | DOI: 10.19184/jid.v17i1.2674

Abstract

Synthesis of ZIF-8 (zeolitic Imidazolate Frameworks-8) have been successfully carried out by the reaction of zinc nitrate and 2-methylimidazolate in DMF (N'N-dimethylformamide) solvent at a temperature of 120 °C for 24 hours. Synthesis of ZIF-8 has been conducted five times with variations molar ratio of metal (Zn2+):ligand (MeIM) consecutive 1:1; 1:1.5; 1:2; 1:2.5 and 1:3 to study the influence of metal-ligand ratio of the crystallinity and morphology of ZIF-8 that was produced. The results of characterization by X-ray diffraction, FTIR and SEM show that ZIF-8 is synthesized with a ratio of metal: ligand = 1:2 showed the highest crystallinity and has the most irregular surface morphology with form box. Keywords: ZIF-8, solvotermal, metal/ligand ratio 
Measurement System of Sugar Content in Liquid Media using Computerized Photodiode Sensor Misto, Misto; Mulyono, Tri; Alex, Alex
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.095 KB) | DOI: 10.19184/jid.v17i1.2664

Abstract

It has been made an electronic system for measurement of sugar cane in solution media. This system uses a pin photodiode as a sensor, laser source, optical fiber, an operational amplifier (Op-Amp), analog to digital converter (ADC) of the Arduino, and computers. The main operation of the measurement system is done by the sensor and controlled by computer. The the photodiode sensor sends a signal to a signal processing unit (op-amp) and converted to a digital signal by the ADC. The digital signal is then forwarded for processing and display (computer). We Concluded that the system working well because of the sugar content information can be simultaneously displayed on the monitor .Keywords: sugar content, pin photodiode, computer
Modification of Sensor Sensitivity of Magneto-Impedancy on Multilayer [Ni80Fe20/Cu]N as result of Electro-Deposition Wicaksono, B. Anggit; Nahrun, Ahmad Asrori; Nuryani, Nuryani; Purnama, Budi
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.77 KB) | DOI: 10.19184/jid.v17i1.2669

Abstract

Multilayer sensor sensitivity [Ni80Fe20/Cu]N as results of electro-deposition on Cu wire has been modified by several variables; namely (i) the frequency of measurement, (ii) the number of iteration N on the system [Ni80Fe20/Cu]N, and (iii) the thickness of the spacer layer of Cu. If applied as a magnetic sensor, the measured sensor sensitivity can be calculated using the formula; ξ = 2 [(ΔZ/Z)max]/ΔH. The results of the sensitivity calculations show that the increase in the ratio of magneto-impedance directly proportional to the sensitivity of the sensor. To modify the frequency of the sample [Ni80Fe20(800nm)/Cu(300 nm)]3, the measurement sensitivity increases with increases in frequency. And the highest sensitivity is obtained 8.91%/ mT at a frequency of 100 kHz. Similar results were obtained in the variation of the number of iteration N multilayer [Ni80Fe20 (800 nm) / Cu (300 nm)]N. Senitifitas measurements at a frequency of 100 kHz and the highest number of iteration (N=5) obtained the highest sensitivity, which is 26.63%/mT. Furthermore, the sensitivity of the sensor showed a tendency to decrease with the increase in the thickness of the spacer Cu in multilayer [Ni80Fe20 (800 nm)/Cu (y nm)]3. Finally, the highest sensitivity was obtained 53.75% / mT for most thin thickness of the spacer Cu (y = 200 nm) which is the highest value in the whole of this experimentKeywords: Sensor Sensitivity, Ni80Fe20 , Frequency Measurement, Iteration Number, Spacer Cu

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