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Jurnal Ilmu Dasar
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 12 Documents
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Search results for , issue "Vol 8 No 1 (2007)" : 12 Documents clear
The Treatment of the Corn-Knob as A Raw Material for Making Furfural Nurul Hidajati
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

This research is conducted to determine the furfural rendement of the corn-knob with the varieties of heating periods of 2; 2.5; 3; 3.5; and 4 hours. This methods used were, first, the hydrolysis of the corn-knob using HCl with the varieties of heating periods as mentioned above. Then it was continued by the extraction and purification of the furfural through distillation. The resulted furfural is identified by the acetic-anilin color reaction, infrared spectrophotometer, refractive index and GC-MS. The identification result was compare with the furfural standard. The result of this research shows that average rendement was 8.43% for the heating period of 2 hours, 9.67%, for 2.5 hours, 11.57% for 3 hours, 13.30% for 3.5 hours and 12.59% for 4 hours.
Ordinal Regression Model using Bootstrap Approach Bambang Widjanarko Otok; M. Sjahid Akbar; Suryo Guritno; Subanar Subanar
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The aim of the research content three part, thus a to know misclassification and model discriminant analysis with bootstrap approach, model regression ordinal with bootstrap approach, and model MARS with bootstrap approach. The data used is data of secondary related to matrix variance covariance is same and unequal that is (The data worker standard of living and banking performance). The result of this research shows that in determining distinguishing variable between groups there are difference of variable at each method. This matter because of at each method has specification either from fulfilled of assumption and also estimation its. So also at accuracy of classification between groups there is difference especially at matrix of variance covariance unequal at worker standard of living case. As a whole can be concluded that the problem accuracy of classification bootstrap approach at each method give small mistake of goodness at matrix variance covariance unequal and equal.Keywords: classification, bootstrap, discriminant analysis, ordinal regression, MARS.
Influence of Nd Substitution for Ca on Formation of 2223 Phase in the Superconductors (Bi,Pb)-Sr-Ca-Cu-O System: (Bi1.4Pb0.6)Sr2(Ca2-xNdx)Cu3O10+δ M . Sumadiyasa Sumadiyasa
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The influence of Nd substitutions for Ca on formation of 2223 phase in the superconductors (Bi,Pb)-Sr-Ca-Cu-O system : (Bi1.4Pb0.6)Sr2(Ca2-xNdx)Cu3O10+δ has been studied. Samples were made by solid state reaction methods, with sintering temperature at 860oC for 40 hours continuously in air atmosphere. From the XRD characterization it is revealed that the samples are poly crystals and the volume fraction of Bi-2223 phase is less than 45%. All of samples show Meissner effect weakly on 77 K, which is indicate that in the samples has formed few superconducting high-Tc phase. This result is in accords with of the resistivity as function of temperature measurement, show that the Tcon-set at 88 K - 107 K, which is range of the critical temperature (Tc) of the Bi-2212 phase and Bi-2223 phase. 
The 35,2 kda Hemaglutinin Protein of Pili’s Proteus mirabilis P355 as Adhesin on Rabbit’s Blader Epitelial Diana Chusna Mufida; Enny Suswati
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Urinary tract infection represent one of nosocomial infection in hospital. One of agent nosocomial urinary tract infection is Proteus mirabilis bacteria and common occur on patient with urinary catheter. Urinary tract infection with caused by P. mirabilis was persistent, very difficult to eradicated. Further more is caused some complication such as cystitis, acut and cronic pyelonephritis, kidney bladder stone, bacterimiae and sepsis. This bacteriae has same virulence factors. Fimbriae is one of it. In the adhesion test utilization of protein hemaglutinin pili 35.2 kDa resulted in the electroelusion which salluted in vesica urinaria epitelial by dose 400μl , 200μl, 100μl, 50μl, 25μl, 12,5μl and 0μl as control. Form adhesion test on vesica urinary epitelial that salluted with 35.2kDa protein pili we faund that the higher dose of protein can decrease bacteriae consentration at vesica urinary epitelial. This result was significant with r= 0.93 and p value = 0.005. This conclusion of this study is 35.2 kDa molecular weight protein pili of P. mirabilis P355 were adhesion protein.Keywords : hemaglutinin, pili, Proteus mirabilis, adhesin
Studies Polymorphism of Blood Plasm Protein in Gurami (Osphronemus gouramy Lac) in Jember County Rike Oktarianti; Mamik Pristiwindari
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The objective of this research was to study the blood protein polymorphism of gurami (Osphronemus gouramy Lac). Blood sample were collected from 55 gurami. Polyaacrilamide Gel Electrophoresis (PAGE) was used in the blood plasm protein analysis. Identification of protein bands on gel are determinated by comparing the molecul weight of those test group protein with the marker protein. The result showed that the locus albumin, pre-albumin and transferin are polymorphic. Locus albumin, pre-albumin and transferin are controlled by three alleles ie A, B and C. The total heterozygozity of gurami is 52 %.
The Dynamic Population of the Bacterial Hydrocarbonoclastic Concorsium in the Crude Oil Sludge Degradation Astri Nugroho
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Experiment in laboratory scale has been carried out to study population dynamic of the bacterial hydrocarbonoclastic consorsium in the crude oil sludge degradation being mixed with NPK fertilizer as nitrogen resources. Aerobic test was carried out by putting erlenmeyers in a shaker incubator, 120 rpm shaking speed, at 50°C temperature. During15 days in laboratory scale observation showed that the consortium has the potential to grow up to 50% (v/v) sludge oil load. Maximum growth and maximum growth rate of the consortium in liquid media occurred in the III C treatment (by adding 50% (v/v) sludge oil and by mixing nitrogen in the form of NPK fertilizer amounting 30% (w/v) of added substrat. At the end of the study 7 species of bacteria were identified, 5 of them are of Bacillus sp, which are aerobical. During degradation process, consorsium growths fluctuativelly. There is spesific process to degrade complex substrat by consortium bacteria.. Specifically, this experiment informs that bacterial consortium degradator of crude oil sludge are more efective than monoculture bacterial. Crude oil consists of complex hydrocarbon, in the other hand for each spesies bacteria has spesific enzyme which work on spesific substrat. They only have limited ability. Each bacteria of its corsorsium has dominated the consorsium which is able to use hydrocarbon fraction.
Antioxidant Activity Assay of Dragon Fruit Extract (Hylocereus undatus (Haw.) Britt. & Rose Evi Umayah U; Moch Amrun H
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Dragon fruit (Hylocereus undatus (Haw.) Britt. & Rose) familia Cactaceae has been cultivated for its beneficial properties on lowering both blood’s cholesterol and glucose level which were related with free radical-antioxidant mechanism. The fruits content antioxidants compound such as vitamin C, caroten, betacyanin pigments dan phenol; therefore it is necessary to determine its antioxidant activity. In this study, the antioxidant activity was performed on both methanolic and water extracts of dragon fruit (planted in Rembangan-Jember area) using diphenyl picryl hydrazil hydrate (DPPH) as stable free radical in spectrophotometric methods. The result showed that both methanolic and water extract exhibits DPPH free radical scavenger as an antioxidant activity with EC50 value sequentially 1.08 % and 2.98 %.Keywords : dragon fruit, Hylocereus undatus (Haw.) Britt. & Rose, free radical, DPPH, EC50.
Application of Tree Regression in Long Study of University of Jember‘s Student Use R Program Yuliani Setia Dewi
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

This research aimed to implemate tree  regression with one respon and six explanatory variables in R programand apply it to know variables which distinguish long study of University of Jember’ student. We can use “tree”function to form tree regression in R.  The result of  research shows that the rate of long study University ofJember’s Student is 1802 days. Based on structure of tree we can know that variables can used to distinguishuniversity of Jember’s students in long study are GPA, time used for doing minithesis and faculty Fromimplementation of tree regression,it is known that tree regression can identify variables locally, revealinteractions in the data set, no variable is assumed to follow any kind of statistical distribution and easy tointerpret. Keywords : tree regression, R program , tree function, long study
Screening and Identification of Alkaloid Compounds in Kayu Kuning Stem (Arcangelisia Flava Merr) Restu Kartiko Widi; Titin Indriati
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Extraction of kayu kuning stem (Arcangelisia flava Merr) with petroleum ether, chloroform and methanol 80% to screen of alkaloid compound has been carried out. Extract of chloroform was added by 10% of NH3 solution and Al2O3, then put into column chromatography and flowed by chloroform. Eluat was tested by dragendorf reagant to know the present of the alkaloid compound. This eluat was identified by thin layer chromatography with chloroform-methanol (1:4 v/v) as a mobile phase. It gave four spots that had the Rf value of 0.78; 0.64; 0.41; 0.18. After these spots were added by dragendorf reagant, only the first spot gave positive result. Then the chloroform fraction was separated by column chromatography to take the fraction which had Rf value of about 0.78 and thenit was analyzed by spectroscopic method (uv-vis and infra red). The data suggested that the alkaloid compound was the pyridin alkaloids group.
Analysis of Quantitative Structure and Solubility Relationship for Organophospate Active Compounds Linear Model and Cluster Model Approach Is Fatimah; Jaka Nugraha
Jurnal ILMU DASAR Vol 8 No 1 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Study on quantitative solubility and structure relationship of organophospate pesticide has been conducted. Aim of this research is to analyze relationship between characteristic physical properties (water solubility) of pesticide with molecular structure by a model that can be used to predict physical properties of new compound proposed to be pesticide compound. Analysis was done for 52 organopospate compounds and its water solubility data. The model predicted by 39 fagmental descriptor based on spesific structure of organophospate compound. Analysis used in modeling are cluster analysis, one way analysis of variance (ANOVA) and regression analysis. Result show water solubility of the pesticide compound positive effect by functional group of P=O, N-primer and C=O in the structure. Functional group of S (sulphur), fen (phenil) , C-aromatic, C1-C2, C3-C4, C5-C6, Ortho Aromatic, P=S, C-Cl and log(Mr) decrease water solubility. The model resulted by regression analysis using stepwise and best subset method is : Ln(1+watsol) = 11.0 - 0.352 n C (aromatic) - 5.41 n (P=S) - 1.55 n (C-Cl), F-value = 32.43 (sign. 0,000) , R2 = 0.67 dan S=2.643. The model can be used to predict the organoposphate water solubility.Keywords : QSPR, ANOVA, regression analysis, organophospate pesticide

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