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INDONESIA
EKSAKTA: Journal of Sciences and Data Analysis
Published by Universitas Islam Indonesia
ISSN : 27160459     EISSN : 27209326     DOI : 10.20885
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Materials Science & Nanotechnology
Ekstakta is an interdisciplinary journal with the scope of mathematics and natural sciences that is published by Fakultas MIPA Universitas Islam Indonesia. All submitted papers should describe original, innovatory research, and modelling research indicating their basic idea for potential applications. The Journal particularly welcomes submissions that focus on the progress in the field of mathematics, statistics, chemistry, physics, biology and pharmaceutical sciences.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 231 Documents
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Characterization And Study Of Iron(III)-Released From Alginate/Zeolite/Fe Composite Nia Silvia Sukma; Yateman Arryanto; Sutarno Sutarno
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 2, August 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss2.art3

Abstract

Alginate is an organic polymer that is isolated from brown algae and bacteria, while the zeolite is an aluminosilicate mineral sample. The purpose of this study was to synthesize composite alginate / zeolite / Fe, characterize composite alginate / zeolite / Fe, and assessing the release properties of Fe (III) of the composite alginate / zeolite / Fe. Characterization of the composite is done by observing the color composite macroscopically, and observing the pattern of distribution of zeolite particles in composites using SEM (Scanning Electron Microscope). As for assessing the release of Fe (III) of the composite system made by soaking the composite in a solution of citric acid 0,33M for nine hours. Components of Fe (III) were dissolved in acid systems were analyzed using UV-Vis spectrophotometer.The results showed that the composite alginate / zeolite / Fe have colors that are significantly dependent on the component ratio of alginate and zeolitnya. SEM analysis provides information that the zeolites distributed evenly on alginate-Fe phase. The release profile of Fe (III) of the composite alginate / zeolite / Fe weight variation component alginate produced three mechanisms to increase and decrease the rate of release of Fe (III). While the release profile of Fe (III) of the composite alginate / zeolite / Fe by weight of the zeolite component generates two mechanisms that increase and decrease the rate of release of Fe (III).
Extraction and Chemical Compounds Identification of Red Rice Bran Oil Using Gas Chromatography – Mass Spectrometry (GC-MS) Method Hoo Sheren Hartono; Hartati Soetjipto; A. Ign. Kristijanto
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 17, ISSUE 2, August 2017
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol17.iss2.art2

Abstract

The objectives of the study are to obtain optimum yield of extraction red rice bran oil, to determine the physico-chemical characteristics, and componen coumpounds. Data was analyzed using Nir Parametric Statistics by Friedmann test. The result showed the optimum extraction results was obtained by the ratio of substrate : solvent of 1: 8 and the oil yield was 12.31 ±0.325%. The physico properties of red rice bran oil were greenish brown colour, with a density ranged from 0.908 ± 0.014 to 0.922 ± 0.014 (g/mL), and the water content ranged from 0.87 ± 0.06 to 0.91 ± 0.02 %. The chemical properties of red rice bran oil were: the acid number ranged from 116.41 ± 1.22 to 118.11 ± 2.45 (mg NaOH/g); the saponification number ranged from 193.74 ±21.88 to 199.62 ± 12.63 (mg KOH/g); and the peroxide number ranged from 24.37 ± 2.44 to 26.07 ± 4.88 (mgek/kg), respectively. Oils was analyzed used GC-MS. The chemical components of rice bran oil are oleic acid (46.24%), palmitic acid (18.25%), linoleic acid (13.29%), 9-octadecane(7.76%).
Analysis of Factors Affecting the Human Development Index in West Kalimantan Province using Data Panel Data Regression Uray Hety Humaira; Jaka Nugraha
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 18, ISSUE 2, August 2018
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol18.iss2.art2

Abstract

Development in the country is growing including in the West Borneo Province. However in 2015, the achievement of human development at the National level is quite low, while the District and City varied considerably. Human Development Index is one of the parameter for human development that are affected by many factors. In this paper, analysis for identify the factors for human development index in West Kalimantan Province by using Regression Analysis was conducted. Regression was based on time series data from 2012 until 2015. It is found that Fixed Effect Model is the best regression model with the R2 of 0.99853%. The influencing variables are Life Expectancy (AHH), Adjusted Per Capita (Expenditure), School Average (RLS), School Expectation (HLS), and Gross Regional Domestic Product at Constant Price (GRDP).
Validasi Metode Bioanalisis Vankomisin HCl dalam Spiked-plasma Manusia Menggunakan KCKT-UV untuk Aplikasi PKOD Ari Wibowo; Damas Inggil Maulidina; Wahyuni Shalatan Fitri; Vitarani Ningrum
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 19, ISSUE 1, February 2019
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol19.iss1.art6

Abstract

As the first-line antibiotic for the treatment of infections caused by methicillin-resistant Staphylococcus aureus  (MRSA), vancomycin has  a narrow therapeutic index with high pharmacokinetic   variability. Therefore, it is deemed necessary to examine its concentration in the blood as a strategy to monitor the fulfillment of therapeutic levels  in patients receiving vancomycin. This study aimed to validate vancomycin bioanalysis  in  spiked-human  plasma  for  the  applications  of  therapeutic  drug  monitoring  (TDM).
Identifikasi dan Estimasi Runtun Waktu Model AR Menggunakan Algoritma Simulated Annealing Abdul Taram; suparman suparman
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 11, ISSUE 2, August 2010
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

When fitting a Autoregressive (AR) model to real data, the correct model order and the model parameter often unknown. Our aim is to find estimators of the order and the parameter based on the data. In this paper the model identification and parameter estimation for AR model is posed within a Bayesian framework. Within this framework the unknown order and parameter are assumed to be distributed according to a prior distribution, which incorporates all the available information about the process. All the information concerning the order andparameter characterising the model is then contained in the posterior distribution. Obtaining the posterior model order probabilities and the posterior model parameter probabilitiesrequires integration of the resulting posterior distribution, an operation which is analytically intractable. Here stochastic simulated annealing algorithm is developed to perform therequired integration by simulating from the posterior distribution. The methods developed are evaluated in simulation studies on number of synthetic and real data sets.Keywords : simulated annealing, autoregressive, order identification, parameter estimation.
Antiangiogenic Effect Of The Chloroform Extract Of Tinospora crispa (L.) Miers Stem In The Chick Embryo Chorioallantoic Membrane (CAM) Induced By bFGF Asih Triastuti
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 11, ISSUE 2, August 2010
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Cancer is one of the most complex disease involving molecular process cause it is hard to be cured. There are many natural compounds which have been used empirically in the society in order to treat cancer. One of them is a kind of herbal medicine called ‘Brotowali’ (Tinospora crispa (L.) Miers). The objective of this research was  to know antiangiogenic effect of the chloroform extract of  brotowali stem using CAM method induced by bFGF. In this research, the inhibition test is done by the CAM at 9 day chick embryo divided  into  seven groups of treatment. Group I is  as the paper disc controller, group II as the bFGF controller, group III as  bFGF +  DMSO 0,8% solvent controller, group IV, V, VI and VII, as the group that conduct the angiogenesis inhibition test. The last four group were given 10 ng of bFGF each and the chloroform extract of brotowali stem with the doses of 15 μg/ml, 60 μg/ml, 240 μg/ml and 960 μg/ml. After having been incubated for 3 days (egg at 12 day), CAM were carefully observed  macroscopically and microscopically. The result showed that  the chloroform extract of brotowali stem can  inhibit the angiogenesis in CAM induced by bFGF. It show that the angiogenesis inhibition for the dose of the chloroform extract of  brotowali stem were successively rise  due to the dose increment, with angiogenic potency  31,87±9,01%,  43,12±8,01%, 53,44±2,70% and  62,81±4,74%.   Keywords : cancer, angiogenesis, Tinospora  crispa (L.) Miers, bFGF, CAM
Uji Aktivitas Ekstrak Etanol Kulit Buah Apel ( Pyrus malus, L) Terhadap Suparmia, Khusnul Khotimah Amal Fadho
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 13, ISSUE 1-2, August 2013
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol13.iss1-2.art9

Abstract

Apple (Pyrus malus, L) is a fruit having much uses for health containing phytochemical and flavonoid substances. One of the substances contained in apple rind is quercetin. Quercetin capable to reduce vascular permeability (Mochizuki et al., 2004). The recent study has an aim to know activity of ethanol extract on apple rind to the reducing of vascular permeability thus it can used as therapies for plasma leakage in curing Dengue Blood Fever. The vascular permeability test it was done an induction method using acetate acid. Testing done on white male mice of the BALB/c strain where the mice were divided into 5 groups. The first and second groups were control groups that are a positive control were given 0.2 mg/20 g standard quersetin suspension and the negative one was given 0.5% Na CMC suspension. The third, fourth and fifth groups were treatment groups where each testing animals were given ethanol extract suspension of apple rind by dosages 0.2, 0.4, and 0.8 mg/20 g of Body Weight mice per oral. Taking data was done by measuring pigment intensities from abdominal cavity liquid had been washed with acetate saline. From percentages of vascular permeability reducing each group then analyzed using statistic analyses those were the one-way anova. If there was found any significant difference then it was continued a Tukey test and bivariate-correlation. From results in the study it was known that percentages of vascular permeability reduces of ethanol extract that were made from apple rind having dosages 0.2, 0.4, and 0.8 mg in sequences as big as 42.15%, 63.28% and 84.19%.Keywords: Pyrus malus, L, kuersetin, vascular permeability
Analysis of Tools for The Description and Analytical Processing of Enviromental Data Ragimova N.A; Abdullayev V.H.; Khalilov M.E.; Abuzarova V.A.; Askerov T.K.
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss2.art6

Abstract

The objects of the research are tools that support the description and analytical processing of environmental data requests. These tools are used for environmental monitoring. Analytical processing of environmental data is necessary for this monitoring by the persons concerned. Here, a star schema is used to describe the data. Analytical data processing tools are required for analysis and research of environmental data. The results of analytical processing of environmental data are used to speed up decision-making. This article also describes the structure of the analytical data processing tool. Therefore, one of the problem points is how to describe the data. For this purpose, an environmental data relay scheme is defined, and the data description is implemented in multidimensional cubes. Due to the growth of data volume, data processing is carried out using multi-dimensional visualization methods. In addition, a visual user interface has been created for analytically processing queries based on scale data. The result of this research is to find a method for describing environmental data. At the end of the research, a hypercube was obtained, with the help of which it was possible to structure environmental data and carry out analytical processing of them. To this end, environmental data have been described using a multi-dimensional visualization method. And OLAP technologies were used to carry out analytical processing of this data. OLAP technologies allow aggregate data to be used and presented as a hypercube. The results of the research can be used as a basis for an environmental information system that is used for environmental monitoring.
Air Pollution Simulation From Cirebon Power Plant Activity Muhaimin Muhaimin; Eko Sugiharto; Adhitasari Suratman
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 15, ISSUE 1-2, 2015
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol15.iss1-2.art2

Abstract

Telah dilakukan penelitian simulasi sebaran polutan dari aktivitas PLTU Cirebon dengan menggunakan model gaussian plume. Persamaan gaussian plume digunakan untuk memprediksikan persebaran dan konsentrasi gas polutan di udara. Tujuan dari penelitian ini adalah untuk mengetahui konsentrasi polutan di udara ambien akibat dari aktivitas PLTU dan pemodelan dispersi polutan di udara yang berasal dari dua cerobong asap. Hasil penelitian menunjukkan bahwa konsentrasi maksimum untuk semua parameter masih berada di bawah baku mutu yang telah ditetapkan. Adapun konsentrasi maksimum untuk parameter SOx sebesar 36,89 µg/m3 sedangkan NOx adalah 31,25 µg/m3. Sedangkan simulasi dengan menggunakan dua cerobong asap konsentrasi maksimum SOx sebesar 52,95 µg/m3 dan NOx sebesar 44,86 µg/m3.
Antibacterial Activities of Green Basil (Ocimum Violaceum) Essential Oil and Derivatives By MAOS (Microwave Assisted Organic Synthesis) Against Staphyllococus Aureus and Escherichia Coli Dwiarso Rubiyanto; Hady Anshory; Hardjono Sastrohamidjojo; Chairil Anwar
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 14, ISSUE 1, February 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Green basil (Ocimum violaceum , Linn.) plantis part of the varieties of basil (Ocimum basilicum, Linn.). Green basil essential oil (GBEO) contain chemical compounds that have an anti- bacterial activities . Methyl eugenol and methyl chavikol are in green basil oil has the potential to be used as a material which is biologically active. Conversion reaction of the compounds in GBEO with MAOS methods (microwave assisted organic synthesis) aims to obtain properties of the main chemical component in a wider sweet basil oil, and are also useful in an attempt to gain more valuable compounds for commercial and higher. The results showed that the optimum reaction conditions on the conversion reaction of compounds in GBEO with MAOS method with ethylene glycol as a solvent is 10 % KF/Al2O3as catalyst and reaction time 3 minutes , while the solvent is glycerol 10 % KF/Al2O3as catalyst and reaction time 2 minutes . Comparison of anti-bacterial activity resulting from this research are : the inhibitory activity to the growth of S. aureus bacteria have the following order : GBEO > green basilEG10-3 > green basil G10-2> amoxicillin with each inhibition zone diameter amounted to 30.7 mm, 21.1 mm, 18.2 mm and 13.4 mm. While the inhibitory activity to the growth of E.coli bacteria are : GBEO> green basil G10-2 >green basil EG10-3 > amoxicillin with each inhibition zone diameter of 21.1 mm, 15.6 mm , 15.2 mm and 7.9 mm . GBEO and its derivatives have minimal inhibitory concentrations below 1.25 %. From the results of the study found that the main derivates obtained are p-methoxy anisaldehyde , caryophyllene oxide , 3-methoxy cinnamaldehyde , humulena oxide and delta cadinol

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