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Faculty of Mathematics and Natural Sciences Universitas Islam Indonesia Jl. Kaliurang Km 14, Ngaglik, Sleman, Yogyakarta, 55584
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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 196 Documents
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Screening of Secondary Metabolites Compounds in Stem Bark of Frangipangi (Plumeria alba) and Toxicity Test on Shrimp Larvae (Brine Shrimp Lethality Test) Santi Nur Handayani; Moch. Chasani
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 12, ISSUE 1, February 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

Frangipani  is  a  plant  belonging  to  the  family  Apocynacea  and  potential  for development as anti-cancer drug material. Content of secondary metabolites, anti-cancer compounds from frangipani (Plumeria alba) steam bark, especially it has not been made. This  research aims  to  identify compounds  secondary metabolites  from  frangipani  steam bark extract potential for development as anti-cancer drug material. Steps undertaken in this study include:  Extraction of secondary metabolites with frangipani  stem  bark  maceration  method  of  storey  with  n-hexane,  chloroform,  ethyl acetate, and ethanol. Each tested extracts obtained using prawn shrimp toxicity A. salina Leach  and  continued  with  the  testing  of  secondary  metabolites  using  color  reagents. fraction  extract  has  potential  as  an  anti-cancer  drugs  is  purified  using  gravity  column chromatography  technique  with  elusi  gradient  technique  using  a  solvent  mixture  n-hexane:ethyl acetate hen conducted toxicity tests followed by identification using GC-MS  Extraction  results obtained by  the  four extracts namely: n-hexane extract  (E1)  is positive flavonoid groups, chloroform extract (E2), ethyl acetate extract (E3) and ethanol extract (E4)  is positive for secondary metabolite groups flavonoid and alkaloid. Toxicity test results obtained LC50 values respectively participated: 973. 7 ppm (E1), 451.35 ppm (E2), 112.557 ppm(E3), and 637.50 ppm(E4).   Keywords: Plumeria alba, secondary metabolite, toxicity test, and A. salina Leach 
Synthesis and Characterization of Nano Activated Carbon from Annatto Peels (Bixa orellana L.) Viewed from Temperature Activation and Impregnation Ratio of H3PO4 Cucun Alep Riyanto; Muhamad Syaiful Ampri; Yohanes Martono
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss1.art7

Abstract

Nano activated carbon is activated carbon with nano-sized carbon particles and can be synthesized from cellulose-containing materials such as the Annatto peels. In this study, the synthesis of nano activated carbon of the Annatto peels was carried out in terms of activation temperature variations and the carbon impregnation ratio of 50% H3PO4 acid and determining the characteristics of nano activated carbon from Annatto peels (NAPAC). The activation method used is the impregnation of carbon in 50% H3PO4 with a ratio of 1: 3; 1: 4; 1: 5; 1: 6; and 1: 7 (w/w) for 24 hours and heating at 400; 500; 600; 700; and 800 °C for one hour. Nano activated carbon from Annatto peels (NAPAC) was characterized by Infrared Spectrophotometer (FTIR), X-ray Diffractometer (XRD), and Transmission Electron Microscope (TEM). The results of the study showed that the NAPAC can be synthesized from Annatto peels with activation by 50% H3PO4 at the temperature of 500°C and the impregnation ratio of 1:5 (w/w). The result of characterization using FT-IR, XRD and TEM showed that NAPAC contains a group of functions O-H, C-H, C=, C=C dan C-O/P=O with an amorphous carbon structure and the range of particles diameter at 22-36 nm
Bentuk Normal Youla dari Matriks Kompleks the Youla Normal Form of Complexs Matrix Euis Hartini
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 12, ISSUE 2, August 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

Sebuah matriks kompleks berukuran n x n melalui transformasi unitary congruence dapat dibentuk matriks segitiga blok dengan diagonal blok berderajat 1 dan 2. Blok 1 x 1 berkaitan dengan nilai coneigen real nonnegatif, sedangkan blok 2 x 2 berkaitan dengan pasangan konjungat nilai coneigen kompleks.                                                                                 Matriks segitiga blok ini merupakan bentuk normal Youla dari matriks kompleks yang dapat berbentuk segitiga atas atau segitiga bawah.   Kata-kata Kunci :  Matriks kompleks, unitary congruence, dan nilai coneigen
Uji Aktivitas Ekstrak Etanol Kulit Buah Apel (Pyrus malus, L) Terhadap Penurunan Permeabilitas Vaskuler Pada Mencit Putih Jantan Strain Balb/C Suparmi Suparmi; Khusnul Khotimah; Amal Fadholi
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 14, ISSUE 2, August 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol14.iss2.art5

Abstract

Apel (Pyrus malus, L) merupakan buah yang memiliki banyak kegunaan dalam kesehatan, yang mengandung zat fitokimia dan flavonoid. Salah satu zat yang terkandung dalam kulit buah apel adalah kuersetin. Kuersetin yang terkandung didalam kulit apel diketahui mampu menurunkan permeabilitas vaskuler (Mochizuki, M., et al, 2004). Berdasarkan penelitian Mochizuki maka dilakukan penelitian yang bertujuan untuk mengetahui aktivitas ekstrak etanol kulit buah apel terhadap penurunan permeabilitas vaskular sehingga dapat digunakan sebagai terapi kebocoran plasma dalam pengobatan Demam Berdarah Dengue. Uji permeabilitas vaskuler dilakukan dengan menggunakan metode induksi asam asetat. Uji aktivitas ekstrak dilakukan pada mencit jantan putih strain BALB/c yang telah dibagi menjadi 5 kelompok. Kelompok pertama dan kedua adalah kelompok kontrol, kontrol positif diberi 50 EKSAKTA Volume 14 No. 2 suspensi kuersetin standar 0,2mg/20g dan kontrol negatif diberi suspensi Na CMC 0,5%. Kelompok ketiga, keempat, dan kelima adalah kelompok perlakuan . Pada kelompok ini, masing-masing hewan uji menerima suspensi ekstrak etanol kulit buah apel dengan dosis 0,2, 0,4 dan 0,8 mg/20g BB mencit per oral. Pengambilan data dilakukan dengan mengukur intensitas warna dari cairan rongga perut hewan uji yang telah dicuci dengan salin setelah terlebih dahulu diberikan sediaan uji, diinjeksi dengan larutan trypan blue, dan asam asetat. Hasil persentase penurunan permeabilitas vaskuler tiap kelompok dianalisa dengan analisis statistik anova satu arah dan dilanjutkan uji tukey dan korelasi-bivariat. Dari hasil penelitian, diketahui persentase penurunan permeabilitas vaskuler ekstrak etanol kulit buah apel dosis 0,2, 0,4 dan 0.8 mg berturut-turut sebesar 42,15%, 63,28%, dan 84,19%.
Metode Improved CHAID (chi-squared automatic interaction detection) Pada Analisis Kredit Macet BMT (Baitul Mal wa Tamwil) Muhammad Muhajir
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 1, February 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss1.art7

Abstract

Penelitian ini bertujuan untuk menetukan segmentasi nasabah berdasarkan karakteristik status kreditnya pada BMT El Bummi 372. Segmentasi ini bertujuan untuk mengidentifikasi segmen nasabah potensial dengan harapan resiko kredit macet yang dapat diminimumkan. Penelitian ini menggunakan data sekunder, yang terdiri dari 945 nasabah yang terdiri dari 94 macet dan 851 tidak macet. Salah satu metode riset segmentasi yaitu Improved CHAID (Chi-Squared Automatic Interaction Detection analysis) yang merupakan perbaikan dari metode CHAID dengan mengelaborasi tabel kontingensinya dengan Tschuprow’s T. Improved CHAID akan menghasilkan diagram yang mirip dengan diagram pohon keputusan yang menyediakan informasi tentang derajat hubungan antara variabel dependen terhadap variabel independen serta informasi mengenasi karakteristik segmen. Pada kasus BMT El Bummi 372,didapatkan enam segmen. Segmen nasabah dengan karakteristik pendidikan (Diploma/S1/Profesi, S2/S3), usia ≤ 50 tahun, ukuran keluarga ≤ 3 orang dan penghasilan >Rp. 1.500.000,00 adalah segmen yang memiliki rasio kredit macet yang paling rendah.
ANTIOXIDANT ACTIVITY OF ETHANOLIC EXTRACT AND FRACTION OF SALAK FRUIT SEEDS ( Salacca zalacca (Gaertn.) Voss. ) USING DPPH (2,2-diphenyl-1-picrylhydrazyl) METHOD Sista Werdyani; Pinus Jumaryatno; Nur Khasanah
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.art5

Abstract

Salak seeds have been developed as a beverage, but there was still a little amount of research that focused on salak seeds. This research was conducted to find out the chemical compounds and the antioxidant activity of ethanolic extract and fraction of salak fruits seeds ( Salacca zalacca (Gaertn.) Voss. ) which have been grown extensively in Sleman Yogyakarta. Extraction was conducted using maceration, followed by fractionation using vacuum liquid chromatography. The identification of the chemical compounds contained in the ethanolic extract and fraction was performed by thin layer chromatography method, while the antioxidant activity was performed by DPPH method. Comparison of antioxidant activity was seen using IC50 values. The results showed that ethanol extract and fraction contained phenol, flavonoid, and tannin. The largest antioxidant activity was found in F7 with an IC50 value of 110.16 μg / ml.
Green Catalysts Activities of CaO Nanoparticles from Pinctada maxima Shell on Alcoholysis Reaction Kendri Wahyuningsih; Jumeri Jumeri; Wagiman Wagiman
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.art4

Abstract

Pinctada maxima shells from West Nusa Tenggara has natural minerals called calcite that can be decomposed into CaO compounds as a green catalyst that heterogeneous, base and environmentally friendly. CaO compounds in the nanometer scale is one option as an alternative substitute or replacement of the use of homogeneous catalysts. The purpose of this study was to test the catalytic activity of CaO compound from the pearl shells (P. maxima) based on particle size. The catalytic activity test has been measured against the percentage of yield of methyl ester produced by alcoholysis reaction. Characterization of nano-CaO compounds has been done using X-ray powder diffraction (XRD), Brunauer Emmett Teller (BET), scanning electron microscope energy-dispersive X-ray spectroscopy (SEM-EDX), transmittance electron microscopy (TEM), while methyl esters has been analyzed using the ASTM method. CaO catalyst on the nanometer-scale have more effective catalytic activity than micrometer scale with the yield percentage of methyl ester obtained are 81,61% and 30,71%, respectively. The results of methyl ester characterization by ASTM method has shown that methyl ester has specification that are close to diesel oil, so it can be used as an alternative or substitution on diesel engine.
Study of Student Satisfaction Level in the Faculty Based on Performance Assessment and Interest Level Achmad Fauzan; Muhammad Hasan Sidiq Kurniawan; Jaka Nugraha
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.art8

Abstract

One way to evaluate various services at the university is seen from the level of student satisfaction. The purpose of this study is to measure how much the level of student satisfaction in the university environment, especially in the Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia (FMIPA UII) and future expectations of students focusing on their respective study programs. 6 aspects were used to find out how much satisfaction the students had, namely: (1) Tangible, (2) Reliability, (3) Responsiveness, (4) Assurance, (5) Empathy, and (6) Information. The research method used is descriptive analysis method related to satisfaction represented by the Cartesian diagram. The study was conducted in a period of 3 months with the sample used being active students in the 2016 and 2017 FMIPA classes proportionally in each study program (study program). The data used are primary data consisting of 2 main assessments, namely performance assessment and importance assessment. The results of the level of satisfaction / suitability are classified into the Cartesian diagram which consists of 4 priorities, namely: top priority, achievement priority, low priority, and excessive. The results of the study obtained overall levels of satisfaction in Mathematics as much as 90% of students were satisfied with the level of performance provided. However, there are still 2 indicators that are included in the priority, namely problems in the key-in process and ease of communication for parents of students to consult. In addition to the contents of each indicator, an analysis of suggestions for improvement in the FMIPA environment using text mining based on barplot and wordcloud is associated with the dominant words appearing to describe the general expectations of students
Effect Of Curcumin And Honey To Pharmacokinetics Of Paracetamol In Male Wistar Rats Dimas Adhi Pradana; Farida Hayati; Agung Giri Samudra; Amalinda Setya Kartika
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 12, ISSUE 1, February 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

Honey and curcumin is widely consumed by children as food supplements. Honey is useful as an antioxidant and antibacterial, while curcumin  is useful as an antioxidant, antiinflammatory,  antibacterial,  antiviral. Both  health  supplements  are  not  infrequently used in conjunction with drugs, especially paracetamol. This study aims to determine the effect of curcumin and honey on the pharmacokinetic parameters of paracetamol in male rats.  In  this  study,  test  animals  were  divided  into  3  groups:  control,  treatment  I  and treatment  II.  In  the  control  group  mice  were  given  paracetamol  150mg  /  KgBW, treatment  group  I  rats  were  given  curcumin  18  mg  /  KgBW,  1  hour  and  then  given paracetamol 150mg  / KgBW whereas  the  treatment group  II  rats given a dose of honey 7.65 mL / KgBW along with giving paracetamol 150mg KgBB . The results showed that administration of curcumin on the pharmacokinetics of paracetamol in mice can decrease the  primary  parameters  of  the  elimination  phase  of  CLT  for  68.25%,  increasing  the secondary parameter t 1 / 2 at 193.72%, thus increasing the derivative parameters AUC0-inf for 88.36%, and MRT of 155.17% (p
EFFECT OF COOKING ON IRON AVAILIBILITY IN FORTIFIED HOMEMADE TEMPEH Micha Mahardika; Fauzan Amin; Arda Ganda Risdiyono
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss1.art4

Abstract

Iron deficiency anemia is a type of anemia caused by iron deficiency, decreasing in the number of healthy red blood cells. The purpose of this study was to make fortified Fe-EDTA and find out the changes in iron availability after cooking (frying and boiling). The biological availability test for iron was carried out in vitro by simulating human digestion using enzyme pepsin and pancreatin-bile solution. The iron variants added were 0, 0.033, 0.066, 0.099, 0.132, and 0.166 % of EDTA iron on 30 grams of raw soybeans to be homemade tempeh. Test results with Atomic Absorption Spectrometry (AAS) showed that the highest Fe content of 12.54 mg was obtained by adding 0.166% of EDTA iron to raw tempeh. But after cooking, there is a decrease in fried and boiled tempeh. The results obtained from the addition of 0.166% of iron-EDTA are 7.74 mg for fried tempeh, and 8.40 mg for boiled tempeh. The results of the addition of Fe-EDTA 0.166% for raw tempeh and boiled match to the value of daily Fe intake to reduce iron anemia in the amount of 8-15 mg / day according to Recommendation Dietary Allowance (RDA). The addition of 0.166% of Fe-EDTA fortification on dried tempeh, it still has not match to the recommended level.Received: 13 September 2019; Accepted: 30 December 2019; Published: 12 January 2020

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