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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 8 Documents
Search results for , issue "Vol 16 No 2 (2015)" : 8 Documents clear
Voltammetric Synthesis of Conducting Polymer Polypyrrole and Its Response Characteristic to Alcohol Nurqomariyah, Susi; Asnawati, Asnawati; Neran, Neran; Siswoyo, Siswoyo
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (243.328 KB) | DOI: 10.19184/jid.v16i2.1485

Abstract

Conducting polymer is a used material for many purposes, including active compound of chemical sensor. Polypyrrole, one type of conducting polymers, is frequently used because of its advantages, namely owing high conductivity, strong mechanical properties and relatively stable compound.  This research was aimed to develop an alcohol sensor based on polypyrrole. Electropolymerisation of the polypyrrole was carried out using cyclic voltammetric technique. This research investigated some parameters electropolymerisation, namely variation of dopant electrolyte concentration, potential scan-rate, surface morphology of the polymer resulted, characteristic of the sensor performance when exposed to some alcohol compounds. According to the result of investigation, it was found that variation of potential scan-rate and dopant concentration has significant effect to the electropolymerisation process as well as to the resulted polymer, as indicated by the voltammogram profiles, the surface morphology of the resulted polymer and the response of resistance change of the polymer when exposed to the alcohol compounds.Keywords: polypyrrole, conducting polymer, alcohol sensor, cyclic voltammetry, electropolymerisation.
Production of Cellulase Enzyme from Aspergilus niger using Rice Husk and Bagasse as Inducer Purkan, Purkan; Purnama, HD; Sumarsih, S
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.132 KB) | DOI: 10.19184/jid.v16i2.2768

Abstract

Aspergillus niger is fungi can produce cellulase enzyme with agriculture waste as natural inducers. The purpose of this study was to compare the natural inducers potential between rice husk and bagasse to produce cellulase enzyme from Aspergillus niger. Production of cellulase enzyme was done with variety of inducers such as CMC, rice husk, and bagasse. The optimization of enzyme production includes optimum production time, inducer type, and optimum concentration of inducer. Furthermore, the enzyme also was characterized in pH and temperature. Enzyme activity test using the DNS method with CMC as substrate. According of this test result show that highest cellulase enzyme activity has production time for 108 hours with rice husk as inducer. The optimum rice husk concentration was needed of 2.5%. The cellulase enzyme was induced by rice husk has optimum activity at pH 4 and 50°C of 0.709 IU/mL.   Keywords : cellulase enzymes, Aspergillus niger, inducers, rice husk, bagasse.
Covariance Based approach SEM with Bollen-Stine Estimation (Case Study Analysis of The Effect of Teacher and Principal Competence on Achievement of National Standards) Kasmuri, Kasmuri; Tirta, I Made; Dewi, Yuliani Setia
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (378.054 KB) | DOI: 10.19184/jid.v16i2.899

Abstract

Applications of covariance Based SEM (CB-SEM) generally use the maximum likelihood, based upon the assumption on the normal distribution of data. One alternative that could be applied if the data were not normally distributed is estimation using  Bollen-Stine bootstrap approach. In this study, the method is applied to reveal the influence of teacher competence, the principal competence, to the value of achievement of national education standards in secondary schools in Banyuwangi.The objective of this paper was to determine and analyze the relationship and to know the  the most dominant indicators of  measure latent variables between the  the principal, teachers competences on national standards of educational attainment in secondary schools in Banyuwangi. The results  indicate that all of the indicator of variables are  valid and reliable to measure corresponding latent variables. Each latent variable has the most dominan indicator. For the principal competence  latent variables the most dominant  indicator is the entrepreneurial competence, for teachers competency the most dominant is personal competence, whereas for  national education standards, the most dominant  standard of facilities. Principal competence  has indirect influence on national education standard achievement, but directly affect the competence of teachers.  Teacher competence directly influence national education standards.Keywords: Power Competence Teachers, Competence Principal, National Education Standards,  covariance Based SEM, Bollen-Stine Bootstrap Estimates
Identification of Ibuprofen, Ketoprofen and Diclofenac by Using Test Strip Based on Imobilized Spesific Reagent on Nata De Coco Membrane Ningtyas, Karisma Wulan; Zulfikar, Zulfikar; Piluharto, Bambang
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.862 KB) | DOI: 10.19184/jid.v16i2.1520

Abstract

Identification of ibuprofen, ketoprofen and diclofenac can be done by using simple method, it is called test strips. Test strip is made by immobilized specific reagents with entrapment technical on membrane matrix, which the used membrane nata de coco. Immobilization reagents with entrapment techniques aimed to trap reagent molecules in the space between the supporting material.The success of this imobilization can be seen from membran changing color after additional reagent and there is no leeching after additional sample on membrane. The used reagent for this identification is methyl red for ibuprofen and ketorpofen, copper acetate for ibuprofen, potassium iodide for ketorofen and mandelin for diclofenac. From the testing result can be seen that potassium iodide is the most specific reagent compare with the other threee other reagents. By using tes strip arranged with the strip made by this imobilization, test srtrip can be used to differentiate the tree other standard samples.   Keywords: entrapment, nata de coco membrane, reagent spesific, test strip.
The Influence of Abiotic Factors on The Diversity and Abudance of Mangrove Crabs (Scylla spp.) in Blok Bedul Alas Purwo National Park Mangrove Forest Gita, Rina Sugiarti Dwi; Sudarmadji, Sudarmadji; Waluyo, Joko
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.774 KB) | DOI: 10.19184/jid.v16i2.1517

Abstract

The purpose of this study was to determine the diversity, abundance and abiotic factors influence the diversity and abundance of mud crab (Scylla spp.) In mangrove forests Blok Bedul Alas Purwo National Park. This research method uses descriptive quantitative method. Diversity is calculated by using the formula of Shannon Wiener, mangrove crab abundance is calculated using the formula abundance Kreb whereas the method of analysis using simple linear regression. The data used in this research is data such as the number and type of biotic mud crabs and data abiotic form of measurement of temperature, pH, salinity, substrate type, and the tide. This study shows the results include mangrove crab species diversity index of every observation stations in the mangrove forests Blok Bedul Alas Purwo National Park is H '= 0.315 showing that the level of diversity in every station is low. The abundance of mud crabs in the mangrove forests Blok Bedul Alas Purwo National Park is 0.0011 individuals / m² which showed that the level of abundance at relatively low research station. Results of the analysis of the influence of abiotic factors on the diversity and abundance of mud crabs in mangrove forests Blok Bedul National Park Alas Purwo not significant (p> 0.05) the diversity and abundance of mangrove crab.   Keywords : abiotic factors , abundance , diversity , mud crab , regression
Simple Design Flow Analysis System for Determination of Iron by Spectrophotometric method Setiani, Wiwin; Mulyono, Tri; Asnawati, Asnawati
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.943 KB) | DOI: 10.19184/jid.v16i2.1519

Abstract

The purpose of this research is to make a series of analyzes using a flow system with a bottle Marriote as pump and spectrophotometric method for determining the content of iron in water samples. Determination of iron by this method used 1,10-fenantrolin complexing or 2,2-bipyridyl. In this method, Fe3+ is reduced to Fe2+ prior complexed with iron to form a specific color and then flowed it through a marriote bottle next to the spectrophotometer detector. The average flow rate of the liquid in the bottle Marriote amounted to 0.037 mL / sec. Limit detection obtained in the batch is 0.00017 ppm and 0.00023 ppm in simple flow systems analysis methods. Sensitivity obtained in the batch method is 0.027 and the simple flow system analysis method is 0.035. Flow rate precision values are expressed Marriote bottle with Kv values <5%. Values accuracy expreced percenting of recovery was 99% in the batch method, whereas the simple flow system analysis method was 98.5%. Results of t-test analysts suggest that iron determination using flow systems analysis (FIA) with the replacement pump bottle Marriote not differ significantly from the results obtained with the batch system.   Keywords: batch method, bottle Marriote, Flow Injection Analysis, spectrofotometry
The Aplications Biological Control of the Pest Population ( Plutella xylostella Linn. And C. pavonana Zell.) and Their Natural Enemies in Cabbage Plants in the Village Kalibaru Kulon, District Banyuwangi Helmi, Helmi; Sulistyanto, Didik; Purwatiningsih, Purwatiningsih
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.627 KB) | DOI: 10.19184/jid.v16i2.1352

Abstract

The aim of the research was to determine the effectiveness of biological control agens  to the population of pests  and their natural enemies in cabbage crops in agricultural land Kalibaru kulon Kab. Banyuwangi. The research was conducted by Randomized Complete Block Design with with five replications. The treatments were Control as P0, Heterorhabditis sp. as P1, Bacillus thuringiensis as P2, Profenofos as P3, Beauveria bassiana as P4, Red bacteria as P5. Data were obtained from observations of pest population and their natural enemies, as well as the percentage decrease in the population of pests and their natural enemies. Data were analyzed using ANOVA and LSD were tested further by 5%. The results showed that Heterorhabditis sp. was the most effective agents to control populations of Plutella xylostela Linn. and Crocidolomia pavonana Zell., this is also indicated by a decrease in pest population of Plutella xylostela by 54.66% and amounted to 47.9% Crocidolomia  pavonana. Aplication biological agens  was not  affect  the population of natural enemies Coccinela repanda, and Verania sp. Keywords : Cabbage, Biological Control, Pests, Natural enemies
Upward Continuation of Subsurface Anomalies Utilizing Magnetic Data in The Bedadung Watershed, Jember City Nugraha, Yudhistira Adi; Hiskiawan, Puguh; Supriyadi, Supriyadi
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.75 KB) | DOI: 10.19184/jid.v16i2.1516

Abstract

Magnetic method is a geophysics method to determine the kind of subsurface material in certain depth by identifying the magnetic characteristics of rock based on the value of magnetic suspetibility. The data analysis described the subsurface anomaly using upward continuation filter. It separated local anomaly and regional anomaly by lifting research area in certain elevation. The raw data research was the total of magnetics data around Bedadung watershed, Jember. It was proceeded to obtaine magnetic anomaly curve on 5 line in contour map. It was digitalized and use as data input of magpick and upward continuation filter program. Upward continuation program was conducted using variation of area elevation in each track from 1 m up to 30 m. magnetic anomaly from this program is compared to magpick result showed that the magnetic anomaly curve on each line have good suitability with the accuracy 0,93%. Therefore, the continuation program become the alternative in magnetic data processing.

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