EKSAKTA: Journal of Sciences and Data Analysis
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.
Articles
231 Documents
<![CDATA[Development of Stages of The Implementation of The Environmental Monitoring Program ]]>
<![CDATA[Rahimova Nazila]]>;
<![CDATA[Abdullayev Vugar]]>;
<![CDATA[Abbasova Vasila]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art3
<![CDATA[The object of the research is environmental monitoring, which allows to present the current situation about the environment. The monitoring program aims to gather information for the decision-making process. This article describes environmental monitoring and highlights its main goals and objectives. This article describes the properties of the environmental monitoring object. The main components of environmental monitoring are also considered here. The database and analytical data-processing tools are main components of environmental monitoring. In addition, this article considers the structure of environmental monitoring. Next, environmental monitoring functions were considered. This article also provided a classification of monitoring systems. One problem is the development of the most appropriate algorithm for implementing environmental monitoring. The article is devoted to the development of software modules of environmental information systems that perform geographic and environmental data processing. There are software modules designed for centralized operation of data (data entry, editing, deleting, etc.), the conceptual types of GIS, the goals and functions of environmental monitoring, and these are taken into account in the existing system. The monitoring system should also have a good search tool, which is also described in this article. The search tool is described using SQL and Delphi. The research used decision-making methods. This article describes the stages of development of an environmental monitoring program. The research identified the inputs and outputs of the environmental monitoring programme, as well as its objects and the relationship between them. The results obtained in the future will be useful for improving the decision-making of authorized persons.]]>
<![CDATA[Adsorption Study of Methylene Blue and Methyl Orange Using Green Shell (Perna Viridis) ]]>
<![CDATA[Febi Indah Fajarwati]]>;
<![CDATA[Nadya Ika Yandini]]>;
<![CDATA[Mai Anugrahwati]]>;
<![CDATA[Amri Setyawati]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss1.art14
<![CDATA[Green shell is generally disposed of and become environmental contaminants. In this study, the green shell was used as material to adsorb dyes residue: methylene blue and methyl oranges. Green shell waste from seafood was prepared by removing the dirt then dried at room temperature. It was followed by roughly crushing before being placed in the furnace at temperatures of 300, 500, 700 and 900 °C. The selected adsorbents were sieved at 200 mesh. The adsorbents were characterized by FTIR and SEM-EDX to evaluate their functional groups and morphology. Furthermore, the adsorption process was evaluated by determining the kinetic adsorption models. The results of the FTIR characterization showed the vibration of Ca(OH)2 bone at a wave number of 3400 cm-1 and morphological analysis by SEM showed a homogeneous surface. Adsorption kinetics results obtained from the variation of time with the initial adsorbate concentration showed the kinetic model of both methylene blue and methyl orange adsorption onto the adsorbent followed a pseudo-second order.]]>
<![CDATA[Adsorption Studies of Rice Husk-Based Silica/Carbon Composite ]]>
<![CDATA[Wara Dyah Pita Rengga]]>;
<![CDATA[Wahyudi Budi Sediawan]]>;
<![CDATA[Nadya Alfa Cahaya Imani]]>;
<![CDATA[Harianingsih Harianingsih]]>;
<![CDATA[Kega Amalania Salsabiil]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art1
<![CDATA[Rice husk as a by-product of the rice milling process is a material that can still be processed to be a product that can be used in various applications. The potential for the commercialization ofrice husks is still hampered by its low economic value. By using the heating method using an inert gas, rice husk can be converted into a composite which contains mostly silica and carbon, a wellknown component with excellent adsorbent properties. This aimed to study the preparation of rice husk-baased silica/carbon composite and its adsorption behavior. In this research, the utilization of rice husk into silica/carbon composites was done by using three different methods. Common heating under temperature of 800 oC, heating process under temperature of 800 oC using furnace equipped with inert gas, and heating process under temperature of 800 oC using furnace equipped with inert gas with addition of glucose solution were carried out in order to obtain three different kinds of composite. Analysis and characterization using were performed to observe the properties of the composites. As the result, from Fourier Transform Infra-Red and X-Ray diffraction characterizations, silica/carbon composites were successfully made as both of carbon and amorphous silica spectra appeared in the result. Furthermore, composite made under temperature of 800 oC using furnace equipped with inert gas with addition of glucose solution has the highest adsorption capacity and Langmuir’s model adsorptive behavior with R2 value of 0.935.]]>
<![CDATA[In Vitro Tracing of Cytotoxic Compounds in Jarak Cina Stem Bark (Jatropha Multifida Linn.) ]]>
<![CDATA[Sista Werdyani]]>;
<![CDATA[Annisa Fitria]]>;
<![CDATA[Sari Rakhmawati]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss1.art2
<![CDATA[Cancer remains one of the diseases with increasing number of sufferers, but research on compounds that act as anti-cancer is also ongoing. Terpenoids have been known as a compound that can inhibit the proliferation of cancer cells. One of the medical plants that produce terpenoids is Jarak cina (Jatropha multifida Linn.). Therefore, the possibility of Jarak cina (Jatropha multifida Linn.) to have an cytotoxic activity on cancer cell proliferation is reasonably high. This study was conducted to determine the cytotoxic activity of Jarak cina (Jatropha multifida Linn.) bark extracts against cancer cell MCF-7. Jarak cina bark was extracted using the multilevel soxhlet extraction method with n-hexane, ethyl acetate, and ethanol as the solvents. All the three extracts were then tested against MCF-7 cancer cells using MTT (3-(4,5-dimethylthiazol-2-yl) - 2,5-diphenyltetrazolium bromide) method. Data analysis was performed for IC50 (ppm) parameter. The results showed that the IC50 of n-hexane extract was 313.21 ppm, while the ethyl acetate extract reached 258.38 ppm of IC50, and the IC50 of ethanol extract was 418.51 ppm. The highest potential of cytotoxicity was found in the ethyl acetate extract, so further testing would be required to optimize the proliferation inhibitory activity.]]>
<![CDATA[Generalised Difference Sequence Space of non-absolute Type ]]>
<![CDATA[A.H. Ganie]]>;
<![CDATA[S. A. Lone]]>;
<![CDATA[A. Afroza]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art9
<![CDATA[It was Shiue [16] who have introduced the Cesaro spaces of the type Cesp and Ces1.In view of Chiue, we shall introduce and study some properties of generalised Cesaro difference sequence space. We also examine some of their basic properties viz., BK property and some inclusions relations will be taken care of.]]>
<![CDATA[Identification of the Existence and Type of Microplastic in Code River Fish, Special Region of Yogyakarta ]]>
<![CDATA[Elita Nurfitriyani Sulistyo]]>;
<![CDATA[Suphia Rahmawati]]>;
<![CDATA[Rizqia Amalia Putri]]>;
<![CDATA[Nolanda Arya]]>;
<![CDATA[Yolanda Amertha Eryan]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss1.art13
<![CDATA[Microplastics are plastic fragments with size less than 5mm in length, according to the U.S. National Oceanic and Atmospheric Administration (NOAA). Microplastics occur and spread in the environment as a result of plastic pollution. Although further assessment is needed to find the health impact of microplastic exposure to humans, several studies show that microplastic might harm the ocean and aquatic life. Code river is one of the big rivers in Yogyakarta. According to the Regional Environmental Agency of Yogyakarta, Code river was highly polluted by domestic waste and wastewater from the settlement along the river and its tributaries. Therefore, the objectives of this research are to investigate the abundance and characteristic of microplastics in fish from Code River Yogyakarta. Fish samples were collected from the fisherman in the upstream, middle, and downstream areas of Code River from February to May 2019. In the laboratory, the samples were analyzed using Wet Peroxide Oxidation (WPO) method. Fish gills and intestine were oxidized using WPO method followed by density separation for 24 hours. Nikon SMZ445 Stereoscopic Microscope with 35x magnification was used to analyze the shape, color, and total of microplastics. The highest abundance was found in fish samples collected from the upstream area (4.33 particles/gram) compare with the downstream area (3.25 particles/gram). The dominant color is blue, while the dominant type of microplastics is fiber.]]>
<![CDATA[Contribution Succinonitrile Additive for Performa LiTFSi Solid Polymer Electrolytes for Li-Ion Battery ]]>
<![CDATA[Qolby Sabrina]]>;
<![CDATA[Titik Lestariningsih]]>;
<![CDATA[Christin Rina Ratri]]>;
<![CDATA[Achmad Subhan]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art2
<![CDATA[The purpose of this study is to evaluate the performance of Solid Polymer Electrolyte (SPE) which has the role of replacing liquid electrolyte in the battery system to reduce leakage. Evaluation of electrochemical SPE consisted of mixture lithium salt, solid plasticizer, and polymer precursor with different ratio. Impedance spectroscopy was used to investigate ionic conduction and dielectric response lithium bis(trifluoromethane)sulfony imide (LiTFSI) salt, and additive succinonitrile (SCN) plasticizer. The result showing enhanced high ionic conductivity. In half-cell configurations, wide electrochemical stability window of the SPE has been tested. The great potential of SPE for applications in lithium-ion batteries can be seen from the ability of window stability at room temperature. Additive SCN contributes to forming pores that make it easier for the Li-ion to move from the anode to the cathode and vice versa for better perform SPE. Pore of SPE has been characterization with FE-SEM. Additive 50% w.t SCN shows the best ionic conductivity with 4.2 volt wide stability window and pretty much invisible pores.]]>
<![CDATA[Preface and Table of Content ]]>
<![CDATA[Preface and Table of Content EKSAKTA]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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<![CDATA[Preface and Table of Content]]>
<![CDATA[Grinding Technique on Synthesis of Calixarene and Its Derivatives ]]>
<![CDATA[Susy Yunita Prabawati]]>;
<![CDATA[Afifah Mufidati]]>;
<![CDATA[Titis Ratna Djuwita]]>;
<![CDATA[Siti Nur Ngaini]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art4
<![CDATA[The synthesis of p-t-butylcalix[6]arene (PK[6]A) and calixresorcinarene derivative compounds, namely C-para-dimethylamino-phenylcalix[4]resorcinarene (CPDAK[4]R) and C-4-hydroxy-phenylcalix[4]-resorcinarene (CHK[4]R), had been carried out by grinding technique. The grinding technique was done with the absence of solvents so that it minimized the waste. Synthesis occurred through electrophilic substitution reactions with KOH as an alkaline catalyst and p-toluene sulfonic acid as an acid catalyst. The three calixarene products were in the form of crystalline solids with a melting point of more than 300°C, insoluble in water with yields of 62.58; 61.94 and 97.49%, respectively. Product characterization using FTIR analysis showed the vibration of the methylene bridge (-CH2-) at a wavenumber of 1473.62 cm-1 and LC-MS analysis for (PK[6]R) showed that the molecular weight was 974.77 g/mole. While the analysis of (CPDAK[4]R) and (CHK[4]R) with 1H NMR showed the presence of protons from the methine bridge (-CH-) that appear at the chemical shift of 4.950 and 3.078 ppm.]]>
<![CDATA[Grinding Technique on Synthesis of Calixarene and Its Derivatives ]]>
<![CDATA[Prabawati, Susy Yunita]]>;
<![CDATA[Mufidati, Afifah]]>;
<![CDATA[Ratna Djuwita, Titis]]>;
<![CDATA[Ratna Djuwita, Titis]]>;
<![CDATA[Nur Ngaini, Siti]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art4
<![CDATA[The synthesis of p-t-butylcalix[6]arene (PK[6]A) and calixresorcinarene derivative compounds, namely C-para-dimethylamino-phenylcalix[4]resorcinarene (CPDAK[4]R) and C-4-hydroxy-phenylcalix[4]-resorcinarene (CHK[4]R), had been carried out by grinding technique. The grinding technique was done with the absence of solvents so that it minimized the waste. Synthesis occurred through electrophilic substitution reactions with KOH as an alkaline catalyst and p-toluene sulfonic acid as an acid catalyst. The three calixarene products were in the form of crystalline solids with a melting point of more than 300°C, insoluble in water with yields of 62.58; 61.94 and 97.49%, respectively. Product characterization using FTIR analysis showed the vibration of the methylene bridge (-CH2-) at a wavenumber of 1473.62 cm-1 and LC-MS analysis for (PK[6]R) showed that the molecular weight was 974.77 g/mole. While the analysis of (CPDAK[4]R) and (CHK[4]R) with 1H NMR showed the presence of protons from the methine bridge (-CH-) that appear at the chemical shift of  4.950 and 3.078 ppm.]]>
