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Ajuk Sapar
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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia
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INDONESIA
Indonesian Journal of Pure and Applied Chemistry
Published by Universitas Tanjungpura
ISSN : 26208571     EISSN : 2620858X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry
Indonesian Journal of Pure and Applied Chemistry (IJoPAC) was first established in 2018 as a scientific journal that accommodates researchers and education practitioners to publish scientific work and research results which are the results of experiments or literature studies in the field of chemistry. Publications are carried out periodically with three issues (January-April, May-August, September-December) in one volume per year. Published scientific work can be in the form of original articles, short communications and review results covering the fields of Physical chemistry, Organic chemistry, Analytical chemistry, Inorganic chemistry, Biochemistry / Biological Chemistry, Applied Chemistry. Focus and Scope of Indonesian Journal of Pure and Applied Chemistry covering the fields : Physical chemistry Organic chemistry Analytical chemistry Inorganic chemistry Biochemistry/Biological Chemistry Applied Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 2, No 3 (2019)" : 6 Documents clear
KARAKTERISASI SENYAWA FENOLIK DARI BIJI BUAH RAMBUTAN (Nephelium lappaceum L.) Eka Pebri Malinda; Rudiyansyah Rudiyansyah; Ajuk Sapar
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (696.123 KB) | DOI: 10.26418/indonesian.v2i3.36890

Abstract

Rambutan seeds are one of the waste produced from rambutan that is potential to be used in the food and pharmaceutical fields because it is rich in nutrients and secondary metabolites. This research was carried out to characterize phenolic compounds from the ethyl acetate fraction by using chromatographic methods, phytochemical tests, and 1H-NMR analysis. The isolate was obtained as white powder with 6.2 mg and gave positive sign for phenolic by phytochemical test. 1H-NMR spectrum data (CD3OD, 500 MHz) showed the chemical shift characteristic of coumarin compounds at δH (ppm): 7.82 (1H, d, J= 8.3 Hz), 7.39 (1H, d, J= 7.55 Hz), 6.73 (1H, d, J= 8.05 Hz), and 5.61 (1H, d, J= 7.55 Hz), an anomeric proton at δH 4.8-5 ppm, the characteristics of the methyl group of L-rhamnose sugar at δH 1.29 ppm and other sugar protons at δH 3-4 ppm. Based on the 1H-NMR analysis and comparison with literature, a phenolic compound obtained from rambutan (Nephelium lappaceum L.) seeds is                            7-O-β-L-rhamnose-8-hydroxycoumarin or 8-O-β-L-rhamnose-7-hydroxycoumarin.
SINTESIS DAN TRANSISI ELEKTRONIK SENYAWA KOMPLEKS KLOROFIL DENGAN LOGAM (M = Co2+, Fe3+) Roberta Anjelia; Imelda Hotmarisi Silalahi; Gusrizal Gusrizal
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2809.383 KB) | DOI: 10.26418/indonesian.v2i3.36891

Abstract

Metal complexes of chlorophyll (M = Co2+, Fe3+) have been prepared from a reaction of chlorophyll isolated from cassava leaves and metal precursors (CoCl2.6H2O or FeCl3) in methanol under reflux for 4 hours. FTIR spectra of the products indicated bond changes in chlorophyll structure particularly on absorption peaks with regard to N–H, N=C, C=C and C=O groups as a result of substitution of magnesium ion with cobalt(II) or iron(FE). UV-Vis spectra mainly showed hypsochromic shifts along with an increase in absorption intensity on Soret band area in the two complexes implying electronic effects of chlorin rings due to metal complexation.
ADSORPSI ASAM LEMAK BEBAS PADA CRUDE PALM OIL MENGGUNAKAN ZEOLIT TERAKTIVASI K2CO3 Nia Dahlia; Winda Rahmalia; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (813.747 KB) | DOI: 10.26418/indonesian.v2i3.36892

Abstract

Research on the use of K2CO3-activated zeolite as an adsorbent for free fatty acid (FFA) adsorption on crude palm oil (CPO) has been done. CPO is one of the mainstay products of Indonesian plantations which are used as raw material for cooking oil. The aim of this study to determine the adsorption capacity of activated zeolites against free fatty acid of CPO. The results showed that the iodium uptake capacity of zeolites before activation was 495.6%, activated zeolites were 527.1% and impregnated zeolites were 642.6%. The number of zeolites with the best absorption was 2 grams and ALB was absorbed 4.079% for activated zeolites (ZAA), 4.98% for impregnated zeolites (ZAI), and the water content and impurities were still below SNI standards. The CPO adsorption process with zeolites shows the Langmuir model with a correlation value (R2) of 0.9999 for ZAA and (R2) of 0.9976 for ZAI. The results showed that activated zeolites had lower absorption than impregnated zeolites.
ADSORPSI ASAM LEMAK BEBAS DALAM MINYAK SAWIT MENTAH MENGGUNAKAN ADSORBEN ABU TANDAN KOSONG SAWIT M Syahwandi; Winda Rahmalia; Titin Anita Zahara; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.167 KB) | DOI: 10.26418/indonesian.v2i3.36894

Abstract

Research on the use of the oil palm empty fruit bunch (OPEFB) as an adsorbent for free fatty acid (FFA) adsorption on Crude Palm Oil (CPO) has been done. CPO is the main raw material in the manufacture of food products. The results of OPEFB adsorbent characteristics showed the amount of water content and ash content of 0,067% and 0,175%, XRF analysis obtained the greatest content of OPEFB in the form potassium metal as much as 44,24%, FTIR analysis identified that there were CO3 compounds in wave number 1648 cm-1 and SEM analysis indicates there are no pores in OPEFB. The result showed that the number of OPEFB with the best adsorption was 0,1 gram with 60 minute optimum contact time. The CPO adsorption process with OPEFB shows the Langmuir model with a correlation value (R2) of 0,8845 and the adsorptions kinetics follows the pseudo order 2 adsorption kinetics model with a correlation value (R2) of 0,9857. The results of this study showed the characteristics of CPO before and after adsorbed using 0,1 g of adsorbent OPEFB showed the amount of FFA level of 7,321% to 6,297%, water content of 0,0025% to 0,00119% and impurities content of 0,8847% to 0,8408%.
SINTESIS TIO2-KAOLIN DAN UJI AKTIVITAS FOTOKATALISIS UNTUK ANTIBAKTERI Escherichia Coli DAN Staphylococcus aureus Desi Listiani; Ajuk Sapar; Anthoni Batahan Aritonang
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2752.994 KB) | DOI: 10.26418/indonesian.v2i3.36895

Abstract

Synthesis of TiO2-kaolinite has been performed using solgel method with titanium tetraisopropoxide (TTIP) as precursor. Synthesis of TiO2-kaolinite by temperature calcination 450 °C for 2 hours to obtain TiO2-kaolinite anatase and then the antibacterial photocatalysis activity of E. coli and S. aureus was performed. Identification of the characteristics TiO2-kaolinite used XRD, SEM, FTIR, and DR-UV. It was found that TiO2-kaolinite has been anatase phase structure with the particle size is 19-103 nm, and have a spheric morphology. Infrared spectra indicate a specific group in wave number 921 cm-1. The antibacterial photocatalysis activity test was performed in liquid media and  measurements by the Optical Density (OD) is using Spectrophotometer UV-Vis at wavelength of 600 nm. The results photocatalysisis activity of TiO2-kaolinite for E.coli, TiO2-kaolinite can kill bacteria occured in the 60th minute, while for S. aureus TiO2-kaolin can kill bacteria occured in the 100th minute. Our results clearly that the TiO2-kaolinite has potential as an antibacterial material in water sterilization.
SINTESIS TiO2/Ti DENGAN TEKNIK ANODISASI DAN UJI AKTIVITAS FOTOKATALIS SEBAGAI ANTIBAKTERI Escherichia coli Resti Fartiwi; Warsidah Warsidah; Anthoni Batahan Aritonang
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.322 KB) | DOI: 10.26418/indonesian.v2i3.36899

Abstract

Titanium dioxide (TiO2) thin layer on the surface of metal Ti has been successfully synthesized using anodization method by varying the anodization times 30, 45 and 60 minutes. Characterization of TiO2/Ti with FTIR method gives absorption peaks at wave number 457,490 cm-1 and 796,635 cm-1, which is a Ti-O vibration. Visualization TiO2/Ti under SEM showed pores with diameter of 10-45 nm as an indication of the morphology of nanotubes, although the length of tubes have not been obtained. The results of XRD measurement give diffractogram at 2q: 25,337°; 37,891° and 48,074° and characterization DR-UV visible value 3,276 eV band gap which characterize crystalline anatase TiO2 phase. Photocatalytic TiO2/Ti exhibit antibacterial activity Escherichia coli were tested using the method of turbidimetry with a spectrophotometer at wavelength of 600 nm. Photocatalyst TiO2/Ti which are synthesized by anodizing process for 60 minutes have inhibitory bacterial growth better than synthesized for 30 minutes and 45 minutes.

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