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Jurnal Ilmu Dasar

JID
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Published by Universitas Jember

ISSN : 24425613 EISSN : - DOI : https://doi.org/10.19184/jid.v24i2.36657

Core Subject : Education, Engineering,

Control & Systems Engineering Mathematics

Jurnal ILMU DASAR (JID) is a national peer-reviewed and open access journal that publishes research papers encompasses all aspects of natural sciences including Mathematics, Physics, Chemistry and Biology. JID publishes 2 issues in 1 volume per year. First published, volume 1 issue 1, in January 2000 and avalaible in electronically since 2012 with ISSN 1411-5735 (Print) and avalaible in electronically since 2012 with ISSN 2442-5613 (online). Jurnal ILMU DASAR is accredited SINTA 3 by the Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia (Kemendibukristek) No. 152/E/KPT/2023 (September 25, 2023), Ministry of Research, Technology and Higher Education of the Republic of Indonesia (RISTEKDIKTI), No. 200/M/KPT/2020 (December. 23, 2020). All accepted manuscripts will be published worldwide JID has been indexed in DOAJ, Dimension, OCLC WorldCat, PKP Index, Crossref, Google Scholar, Base, Garuda, and OneSearch. JID have been collaborated in KOBI-ID (Konsorsium Biologi Indonesia) and HKI (Himpunan Kimia Indonesia) since 2017.

Arjuna Subject : Matematika - Kontrol dan Optimasi

Articles 415 Documents

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Production Optimization and Cellulose System Characterization of Bacillus circulans Local Strain Using Inducer Avicel Evi Susanti
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (270.405 KB)

Exploration of aerobic bacteria which can produce cellulase system is very important to discover potential celulase resourse which can hydrolysis lignocelulose waste into glucose. The aimed of this researched were determine optimum condition of cellulase system production in Berg’s media with avicel as inducer and it’s characterization. Bacillus circulans local strain from laboratory of Microbiology ITB produced consist of CMC- ase(111.11U/mL)andavicelas (55.56U/mL) in Berg’s medium contain 0.5% avicel, pH=9.0 and 5 days of incubation. Characteristic of this cellulase system were: (1) optimum level of CMC-ase (129.97 U/mL) and avicelase (87.96 U/mL) was obtained at pH= 7.0, temperature 50oC and 2 hours incubation, (2) Vmaks and Km of CMC-ase was 1000 μg glucose/hour and 5%, Vmaks and Km of avicelase was 200 μg glucose/hour and 1.2%, (3) capable of hidrolizing sugarcane, corn cob and rice bran during optimum condition and released glucose 262 ppm, 81 ppm and 78 ppm. This research encouraged that Bacillus circulans capable of producing cellulose system with high activity and suggested to degradated lignocelluloses as feedstocks of bioetanol.

Study of the Activity of Ni/H5-NZA Catalyst and Co(II)/H5NZA to Catalytic Cracking Methyl Ester Jatropha Novita Andarini
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (292.527 KB)

The catalytic activity of H5NZA, Ni/H5NZA and Co/H5NZA converting methyl ester jatropha have been studied. The reaction was proceeded in flow fixed bed reactor that operated at the temperature of 450oC for 60 minutes using butanol as the catching-feed. The catalysts were prepared by acidifying of natural zeolite using HF 1%, HCl 6 M and NH4Cl 0.1 M), it was then hydrothermally treated and calcinated with nitrogen. Finally, it is oxidized and impregnated by ion nickel and cobalt (2% w/w). Meanwhile, the methyl ester jatropha as feed stocks was prepared by reacting a jatropha oil with sodium methoxy. The catalytic process was done by placing a catalyst on the flow fixed bed reactor at the temperature of 450oC and flowing a methyl ester and butanol to the reactor for 60 minutes with a fixed flow rate. A liquid fraction have been produced and were then characterized using GC. The maximum percentage conversion of methyl ester was found to be 94.6891% using catalyst of zeolite acid H5NZA which were indicated by a reduction signal of the original methyl ester. The selectivity of this catalyst was performed by the specific product on the retention time of <2.5 minutes. The modified catalysts which were impregnated by the ion Ni and Co shown their selectivity on range of retention time of 2.5-5.0 and 5.0-10 minutes respectively.

Photodegradation Of Diazinon Pesticide In Suspension Of TiO2 La Ode Ahmad Nur Ramadhan; Amiruddin Amiruddin
Jurnal ILMU DASAR Vol 14 No 1 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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

Finite Difference Method and Newton's Theorem to Determine the Sum of Series Tri Mulyani; Moh. Hasan; S. Slamin
Jurnal ILMU DASAR Vol 14 No 2 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Problems that are often faced to prove the truth of a formula if the presented series is a series that is not the formula of arithmetic and geometric series. One proof among the most commonly proofs used is the proof by mathematical induction. This study was conducted to determine the sum of the first n terms formula of: (1) arithmetic series, storied arithmetic series with the basis of arithmetic series, (2) geometric series, (3) storied arithmetic series with the basis of geometric series, and (4) series which are not arithmetic and geometric series that the formula of the n terms is given, by using the finite difference method and Newton's theorem. The formula of the sum of the first n terms obtained from the results of this study and then it is verified by using mathematical induction. Keywords : Series, finite difference, mathematical induction, Newton’s theorem

The Efficiency of First (GEE1) and Second (GEE2) Order “Generalized Estimating Equations” for Longitudinal Data Rizka Dwi Hidayati; I Made Tirta; Yuliani Setia Dewi
Jurnal ILMU DASAR Vol 15 No 1 (2014)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The approach of GEE focuses on a linear model for the mean of the observations in the cluster without full specification the distribution of full-on observation. GEE is a marginal model where is not based on the full likelihood of the response, but only based on the relationship between the mean (first moment) and variance (second moment) as well as the correlation matrix. The advantage of GEE is that the mean of parameter are estimated consistently regardless whether the correlation structure is specified correctly or not, as long as the mean has the correct specifications. However, the efficiency may be reduced when the working correlation structure is wrong. GEE was designed to focus on the marginal mean and correlation structure as nuisiance treat. Implementation of GEE is usually limited to the number of working correlation structure (eg AR-1, exchangeable, independent, m-dependent and unstructured). To increase the efficiency of the GEE, has introduced a variation called the Generalized Estimating Equations order 2 (GEE2). GEE2 has been introduced to overcome the problem that considers correlation GEE as nuisiance, by applying the second equation to estimate covariance parameters and solved simultaneously with the first equation. This study used simulation data which are designed based on the the AR-1 and Exchangeable correlation structure, then estimation are done using theAR1 and exchangeable. For GEE2, estimation done by adding model for correlation link. The result is a link affects the efficiency of the model correlation is shown with standard error values generated by GEE2 method is smaller than the GEE method.

Analysis of Groundwater Decline and Land Subsidence by using of Microgravity and Vertical Gravity Gradient Over Time Method Suhayat Minardi; Hiden Hiden; Daharta Dahrin; Mahmud Yusuf
Jurnal ILMU DASAR Vol 15 No 1 (2014)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Studies have been conducted to identify the occurrence of subsidence, a decline of groundwater, and to model the causes of subsidence in areas of Jakarta based on response of microgravity anomaly and vertical gravity gradient over time. Based on the processing and interpretation of gravity data advance of the time concluded that by using a combination of time lapse microgravity and its vertical gradient have been able to localize the source of the gravity anomaly and the results are strongly support the results of filtering to separate the source of the anomaly. The subsidence that occurs predominantly due to resettlement (in West and North Jakarta), caused by the extraction of groundwater and resettlement (in Central and East Jakarta), and dominated due to the extraction of groundwater (in South Jakarta).Keywords : Groundwater, time lapse micogravity, time lapse vertical gradient, resettlement, subsidence

RACK STORAGE COMPONENT DESIGN BY PARAMETRIC CURVES AND SURFACES Puji Astuti; Kusno Kusno
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The purpose of study is to obtain procedures of designing several models of rack support and pole component, so that the shape are varies, symmetrical, graded, and balance. The results show that the procedure of designing rack support component can be done by taking some data of a space frame construction of the cube, triangular prism, or cone, then we set a few points on the frame to build piece of parametric curve. Finally we interpolate the curves to find a rack support surfaces. As for the rack pole component, the procedures are: we extract data of straight line segments, oblique or helical shape, then we enumerate the lines into several sub-segments, and then breaks it down to build the trending, chain, and graded curve to get a balance rack pole .

Isolation of Genes Encoding Arthropod Odorant Binding Proteins (OBP), D7 from Salivary Gland Vectors of Malaria: Anopheles sundaicus Nuryatmaja Gora Pawana; Kahar Muzakhar; Kartika Senjarini
Jurnal ILMU DASAR Vol 16 No 1 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v16i1.621

The isolation of Arthropod Odorant Binding, D7 protein, encoding genes from Anopheles sundaicus and An. maculatus mosquitos as the malaria vectors in Indonesia is necessary to recognize their characteristic. The isolated genes can be used to develop the Transmission Blocking Vaccine (TBV). This research aims to characterize the D7 protein encoding genes from An. sundaicus and An. maculatus through the synthesis of complementary DNA (cDNA) of D7 protein by using D7 protein primer that has been used for the other species of Anopheles. The mosquitos were taken from Dusun Parasputih, Bangsring, Wongsorejo, Banyuwangi, Jawa Timur. Isolation of the salivary gland was done by performing microdisection method and the isolation of the total RNA was done by performing High Pure RNA Isolation Kit (Roche-Germany). Synthesis of cDNA D7 encoding gene and its amplification were performed by using Maxime RT-PCR Premix Kit (iNtRon Biotechnology). The result of the total RNA and RT-PCR were run in agarose gel and visualized under the UV transiluminator. Based on the visualization, we found that the salivary gland total RNA of female An. sundaicus was 500-750 base pair (bp). The RT-PCR visualization showed a band sized below 100 bp and it was concluded not to be the size of the D7 protein encoding gene. An incompatibility of D7 primer from An. gambiae with cDNA template from An. sundaicus was suspected to be the reason of the gene isolation failure.Keywords: gene isolation, D7 protein, salivary gland, Anopheles sundaicus

Simulation of Formation of Icosahedral Structure in Solid-Liquid-Solid Phase Change Using Molecular Dynamics Methods Nikodemus Umbu Janga Hauwali; Artoto Arkundato; Lutfi Rohman
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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

Potential of Waste as Raw Silk Worm Biodegradable Surfactant Ery Fatarina P; Mega Kasmiyatun; MF. Sri Mulyaningsih; T. Da Silva
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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

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Jl. Kalimantan 37 Kampus Tegalboto Jember 68121 Telp. 62 331 334293 Fax. 62 331 330225

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Jawa timur

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

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Contact Name Solikhatun

Contact Email solikhatun@ugm.ac.id

Phone +62331334293

Journal Mail Official jid@unej.ac.id

Editorial Address Jl. Kalimantan 37 Kampus Tegalboto Jember 68121 Telp. 62 331 334293 Fax. 62 331 330225

Location Kab. jember, Jawa timur INDONESIA

Abstract

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Contact Name
Solikhatun

Contact Email
solikhatun@ugm.ac.id

Phone
+62331334293

Journal Mail Official
jid@unej.ac.id

Editorial Address
Jl. Kalimantan 37 Kampus Tegalboto Jember 68121 Telp. 62 331 334293 Fax. 62 331 330225

Location
Kab. jember,

Jawa timur

INDONESIA