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I Wayan Sutapa
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wayansutapa@fmipa.unpatti.ac.id
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Department of Chemistry, Faculty Mathematics and Natural Science, Pattimura University, Ambon, Maluku
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INDONESIA
Chemistry Indonesian Journal of Chemical Research
  • Indonesian Journal of Chemical Research (Indones.
  • Website
Published by Universitas Pattimura
ISSN : 23385359     EISSN : 26142627     DOI : 10.30598//ijcr.2021.-irm
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science
Indo. J. Chem. Res. is a journal that regularly publishes primary articles covering all branches of chemistry and its sub-disciplines. Published articles consist of complete research, short communication, and review articles. The scope of published articles is not limited to inorganic chemistry, physical chemistry, organic chemistry, analytical chemistry, and biochemistry. Editors can invite articles review of authors that includes the latest developments in the field of interest of certain chemicals. A contribution is open to researchers from all countries.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 237 Documents
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Analyzed The Resistant Starch Content of Some Types of Sago Starch In Embarrassment with Heating Temperature Variations Petrus Lapu; Ivonne Telussa
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Analyzed the resistant starch content of some types of sago starch in embarrassment with heating temperature variations have been conducted. In this analysis was done processing sago starch suspension, determination of the fat content of flour, qualitative test and analysis of starch digestibility and resistant starch manufacture of some types of sago starch in Maluku (sago ihur, sashes, molat) by varying the temperature of the heating method. The results were obtained moisture content of the sample base for this type of sago ihur 49.61%, 45.85% and sashes molat 47.77% while for the corn starch to the type ihur 9.329%, 6,245% and Molat sashes 5,793% while the tannin-free corn starch to type ihur 5.362%, 5,407% and molat sashes 4,719% and ash content of corn starch to the type ihur 0.09656%, 0.0761% and molat sashes 0.07146%. Glucose levels in samples of corn starch (type ihur, sashes and Molat) is hydrolyzed by the enzyme pancreatin is greater than the resistant starch glucose levels ranged from 1-1.4 mg / mL whereas for resistant starch samples with smaller temperature variation which is equal to 0.6-1.0 mg / mL.
Synthesis Of 3,4-Methylendioxy Isoamyl Cinnamic As The Sunscreen Compound From Cullilawang Oil Mario R. Sohilait; Hanoch J. Sohilait; Eirene Fransina
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Synthesis of 3,4-methylendioxy isoamyl cinnamic as the sunscreen compound from safrole isolation of cullilawang oil had been concluded. The reactions begin from isolation safrol with reduction pressure destilation fractination yield 74.71% safrol. The isomerization of safrole to isosafrole using KOH without solvent at temperature 130­ 0C for 5 hours yield 86.50% isosafrole. The oxidation of isosafrole using KMnO4 with polysorbate (Tween 80) catalyst, yield 72.33% pyperonal crystal. The crystal of pyperonal was synthesis to become sunscreen compound of 3,4-methylendioxy isoamyl cinnamic through Claissen condensation reaction using isoamylacetate and sodium metal, yield 56.87% with 88.16% purity. The purity was tested by GC and the elucidation of those structure was analyzed by FTIR, 1H-NMR abd MS. The sunscreen efectivity of 3,4-methylendioxy isoamyl cinnamic was exam using UV-Vis spectrofotometer according to Petro method showed that the compound have a protection against UV-A light with the SPF value = 5.31
Cow's Fat Processing To Biodiesel By NaOH As Catalyst In Methanol Eirene Fransina; I Wayan Sutapa; Susan Hehanussa
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

The research about biodiesel produced from cow's fat using sodium hydroxide (NaOH) as catalyst has been done. Biodiesel produced from cow's fat was done through transesterification process using methanol 1:12 which priory react with 0.3% NaOH as catalyst due to oil and methanol weight. The transesterification process was conducted for 5 hours at 65°C. Biodiesel from cow's fat is characterisized by GC-MS and ASTM (American Society for Testing and Materials) method. Methyl ester which produced from cow's Fat fat are 31.67% of stearic acid, 25.67% of palmitate acid, and 22.68% of oleate acid. Biodisel from cow's fat are qualified as diesel fuel and biodiesel characterisized by ASTM for specific density (0.8705 kg/m3), kinematic viscosity (4,481 mm2/s), flash point (176,5 0C), pour point (21 0C), and Conradson's carbon residu (0.0139% wt).
Screening Of Phytochemicals And Bioactivity Test Of The Leaves Breadfruit (Artocarpus altilis) Rosmawaty Rosmawaty; Hellna Tehubijuluw
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Screening phytochemical and bioactivity test of breadfruit leaves (Arthocarpus altilis) have been done. The samples were used in the study extracted by maceration method with some solvent polarity enhanced, there are: n-hexane, chloroform, ethyl acetate, and methanol. The bioactivity test use BST (Brine Shrimp Lethality test). The activity assay use brine shrimp A. salina Leach. Content of the secondary metabolites in four crude extract of leaves of breadfruit (A. altilis) are alkaloids, steroids, terpenoids, and flavonoids. Whereas only phenolic compounds contained in the crude extract of chloroform and methanol. The saponins content only in the crude extract methanol. The fourth test of bioactivity of the crude extract of leaves of breadfruit there are: n-hexane, chloroform, ethyl acetate, and methanol had LC50: > 1000 mg / mL; 387.436 mg / mL; 415.623 mg / mL; and 392.826 mg / mL respectively. The crude extract of chloroform, ethyl acetate, and methanol classified active in the BST test to brine shrimp A. salina, while the crude extract n-hexane classified as inactive. The Leaves of breadfruit (A. altilis) has potential to be used as medicine.
Kinetic Study And Isoterm Adsorption Of Pb Metal In Ouw Village Clay Activated Ammonium Nitrate Salt Serly J. Sekewael; Hellna Tehubijuluw; Delvika R. Reawaruw
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Kinetics studies and adsorption isotherms of Pb metal have been conducted on activated clay salts of ammonium nitrate (NH4NO3). Clays used are taken from Ouw village, Central Maluku. Clay activated by soaking in a solution of NH4NO3 700 ppm for 5 hours, then filtering and heating in a furnace at 550 oC for 4 hours. The optimum adsorption of metal ions Pb (II) by activated clay ammonium nitrate occurs at pH 4 with a contact time of 4 hours and followed the Freundlich adsorption isotherm pattern with a Kf value of 1.6193 x 10-8 mg/g and n value of 0.2059. Pb adsorption kinetics followed the pseudo-second-order Lagergren equation with the value of the adsorption rate constant (k2, ads) of 0.1248 g mg-1 min-1 and Xe value of 4.4783 mg/g.
Separation Of Copper And Chromium Metal In Ultrabasic Rocks From Top Of Manoapa Region, Subdistrict Of Lasusua Southeast Sulawesi By Ligand of 2 - (Aminometil) Pyridine La Harimu; Hasria Hasria; Putri Intan
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Study on separation of ions chromium metal and copper in ultrabasic material located in the village to of Monapa subdistrict Lasusua Regency Kolaka Utara Province Sulawesi Tenggara was conducted. The aim of this study was to determine the ability of the ligand 2-(aminometil) pyridine to separate chromium metals and copper to pure metals and its application to separate the chromium metals (Cr) and copper (Cu) in ultrabasic material from the village of Puncak Monapa subdistrict Lasusua Regency Kolaka Utara Province Sulawesi Tenggara by means of extraction method. The concentration of ions chromium metal (Cr) and copper (Cu) of the pure metals are extracted respectively 10 ppm, and the concentration of the ligand 2-(aminometil) pyridine is 10 ppm. For concentration ion chromium metal (Cr) and copper (Cu) in ultrabasic material with 20x and 30x dilution is 8.3875 and 1.3590 and 3.50 ppm and 2,001 ppm for the ions copper metal (Cu). Results of this research shomush that the ability of ligand 2-(aminometil) pyridine for extracting chromium metals (Cr) and copper (Cu) for a single pure metal has a percent extraction (%E) are respectively 79.375 % and 82.37 %. Separation ability of ions chromium metal (Cr) and ions copper (Cu) mixed are 77.625% and 79.96%. For its application in separating ions chromium metal (Cr) and copper (Cu) in ultrabasic material to 20 time dilution extraction are 74.51% and 71.35%, and 30 time dilution are 69.28% and 69.71%. Based on the results of the study ligand 2-(aminometil) pyridine is relatively better for ions copper metal (Cu) for extraction ions of pure metal and relatively similar to ultrabasic material.
Biodiesel Production From Bintanggur Oil (Callophyllum inophyllum L.) Using Calsium Oxide (CaO) Catalyst I Wayan Sutapa; Rosmawaty Rosmawaty; Ismah Samual
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

The research of the biodiesel from bintanggur oil (Calophyllum inophyllum L.) using calsium oxide (CaO) catalyst had been done. In this study, a two-step process was used to produce biodiesel from bintanggur oil. Initially by esterification process using H2SO4 1.25% catalyst by weight of oil and methanol with a molar ratio of 1:9 and continued by transesterification process with 1:12 (oil : methanol) with the catalyst 8 wt% CaO. The esterification and the transesterification process carried out of 2 hours and 7 nespectively at a 65 °C. The synthesis of biodiesel was analyzed by FT-IR spectrophotometer. The conversion of biodiesel is 44.49%. The biodiesels properties were caracterized by ASTM method. Results of biodiesels properties there are specific gravity of 0.8878 g/cm3, viscosity kinematic 5.572 cSt, flash point 176.5 °C, pour point 9 °C, cooper strip corrosion 1b, and Conradson carbon residue 2.469%.
Synthesis Of Derivate Acetophenone From Fenol And Eugenol Imanuel B. D. Kapelle; Sabirin Matsjeh
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

The synthesis derivate acetophenone from fenol and eugenol had been carried out. The acylation of fenol was performed by anhydride acetate and the fries rearrangement reaction was carried out using AlCl3 catalyst at temperature of 50oC produce ortho-hydroxyacetophenone (35,29 %), purity was tested by GC, structure elucidation of these product ware analized by FTIR and 1H-NMR. Acylation reaction of eugenol was performed by anhydride acetate in base condition at temperature of 120oC for 3 h produce 5-allyl-2-hydroxy-3-metoksi acetophenone (21,42%), purity was tested by GC, structure elucidation of these product ware analized by FTIR, 1H-NMR and MS.
Effect Of Soft Drink To Demineralization On The Tooth Enamel By Addition Of Sodium Fluoride Ruslan Ruslan
Indonesian Journal of Chemical Research Vol 1 No 2 (2014): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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This research was carried to determine the influence of soft drink with tooth, determine power to retard of NaF at the demineralization of tooth enamel and to determine of Calcium and Phosphate total which dissolve. The research was carried out with to flood the tooth in soft drink without to add a soft drink and with to add a soft drink at the certain time variation. The demineralization of tooth enamel to see at the decrease of tooth weight before and after flooded. The degree of Calcium in soft drink to measure with Atomic Absorption Spectrophotometry (AAS) and the degree of Phosphate in soft drink to measure with Ultra Violet-Visible Spectrophotometry. The result of research shows that the more long time tooth contacts with soft drink, the more much Calcium and Phosphate which dissolve. And with to add the Fluor with concentration 1 ppm can to harm demineralization of tooth enamel.
Adsorption Cu2+ Metal Ion Of Pectin From “Tongka Langit” Banana’s Crust (Musa Speices Van Balbisiana) I Wayan Sutapa; Victor P.D. Siahay; Matheis F.J.D.P. Tanasale
Indonesian Journal of Chemical Research Vol 1 No 2 (2014): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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The adsorption Cu2+ metal ion of pectin from "tongka langit" bananas crust (Musa Speices van balbisiana) has been done. Pectin was obtained from extraction "tongka langit" bananas crust with HCl at temperature 90 oC during 4 hours. Pectin was produced 9.49 grams (10.41%). Identification functional group of pectin before and after adsorption use FT-IR spectrophotometer and defractometer XRD while Cu2+ metal adsorption result was analized with using AAS. Adsorption Cu2+ metal was followed adsorption isotherm Freundlich with KF value = 4.33 mg/g and n value = 0.86.

Page 1 of 24 | Total Record : 237

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