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I Wayan Sutapa
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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 314 Documents
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Ekstraksi Dan Karakterisasi Kitosan Dari Kulit Udang Windu (Penaeus monodon) Serta Proses Depolimerisasi Kitosan Dengan Hidrogen Peroksida Berdasarkan Variasi Suhu Pemanasan Tanasale, Matheis F.J.D.P.; Telussa, Ivonne; Sekewael, Serly J.
Indonesian Journal of Chemical Research Vol 3 No 2 (2016): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.3-mat

Abstract

An extraction of chitin from shell of the tiger shrimp (Penaeus monodon), a convertion chitin into chitosan and depolymerization chitosan into oligochitosan using hydrogen peroxide based on variations in heating temperature have been done. Chitosan had depolymerized and it’s molecular weight had tested by end group analysis method and it’s degree of deacetylation had tested by UV-Vis spectrophotometry method. Oligochitosan had obtained from the conversion of chitin is isolated from the shell of tiger shrimp and from commercial chitin. The content of chitin obtained in tiger shrimp shells was 35.90% while the result of the conversion of commercial chitin into chitosan amounted to 62.33%. Characterization of functional groups using FTIR spectrophotometry showed that the conversion of chitosan from chitin commercial have absorption bands of 3617.56 (OH), 3050.47 - 3127.63 (-NH stretching), 2894.24 (-CH methylene), 1679.06 (-C = O), 1564.30 (-NH bending), and 1076.30 cm-1 (-CO-). The commercial chitosan which is characterized by FTIR spectrophotometric method also supports the results of the conversion of chitosan from chitin commercial. In the process of depolymerization of chitosan by hydrogen peroxide was found that the greater heating temperature was used, the smaller the percent yield and molecular weight of oligochitosan were at 40 oC, 50 oC, 60 oC and 70 oC gained weight average molecular oligochitosan were 1030.12 g/mol, 1019, 28 g/mol, 978.12 g/mol, and 908.82 g/mol, respectively
Pengaruh Asam Cuka Terhadap Kandungan Histamin Dalam Daging Ikan Komu (Auxis rochei) Hattu, Nikmans; Fransina, Eirene G.; Seumahu, Cecelia A.; Sopacua, Josina
Indonesian Journal of Chemical Research Vol 3 No 2 (2016): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.3-nik

Abstract

The research on the effect of vinegar to histamine content in bullet tuna (Auxis rochei) has been done. Histamine content of quantitatively determined using a standard curve regression equation (y = 0.005 x - 0.046) with a price coefficient of determination (R2 = 0.926) is close to unity. The results showed levels of histamine in bullet tuna marinated in vinegar with variation concentrations of 5%, 10%, 15%, 20%, and 25% within 10 minutes, are 25.9099; 20.0408; 18.9671; 18.7108 and 18.6336 mg/100g respectively. While the levels of histamine in bullet tuna marinated in 25% of vinegar with variation of 10 minutes, 20 minutes, and 30 minutes, are 18.6336; 16.0550; and 15.5246 mg/100g respectively.
Karakterisasi Karbon Dari Tempurung Kemiri (Aleurites Moluccana (L) Willd) Dengan Alat XRD Latupeirissa, Jola; Tanasale, Matheis F.J.D.P.; Dade, Kalam
Indonesian Journal of Chemical Research Vol 3 No 2 (2016): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.3-jol

Abstract

The research of carbon characterization from candlenut shells before and after activation has been done. Activated carbon were obtained through the heating process at 350 °C for 2 hours. The carbon charcoal were further cooled and sieved with a 100 mesh sieve. Then, calcinated at 450 °C and nitrogen (N2) were flowed for 2 hours and characterized by XRD for carbon before activation. Carbon was activated by using KOH solution with a concentration of 50% for 5 hours, then dried in an oven at 120 °C for 1 hour and characterized. XRD diffractogram of crystallization for carbon before activation produced three main peak were 2.93 Å, 3.25 Å, and 8.26 Å, and at 2Ө region of 30.47°, 27.40°, and 10.70°, respectively. XRD diffractogram of crystallization for activated carbon produced three main peak were 3.0195 Å, 3.3383 Å and 8.0955 Å, the 2Ө value which was shifted of 29.560°, 26.682°, and 10.920°. This shift indicates that the distance difference between charcoal crystal face caused by KOH activator. Weight acidity solids before and after activation was 27.370 x10-3 and 33.1245x10-3 mol.g-1, respectively.
Sintesis Turunan Amida N-4-O-Asetilferuloilmorfolina dari Asam Ferulat Melalui Metode Konversi Tidak Langsung Sumarna, Sabir; Firdaus, Firdaus; Soekamto, Nunuk H.
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-sab

Abstract

Synthesis of N-4-O-asetilferuloylmorpholine from ferulic acid via indirect conversion methods with acetylation, chlorination and amidation (in situ) reactions have been conducted. The acetylation was carried out using acetic anhydride reagent in pyridine solvent at room temperature for 6 hours. The chlorination was performed with thionyl chloride in benzene solvent by reflux at 75°C for 4 hours, proceeded by in situ amidation utilizing morpholine in the presence of triethylamine and pyridine using dichloromethane solvent at room temperature. The target molecule as white crystalline solids with m.p. of 91-92°C. Characterization of these compounds was committed by FTIR spectrophotometry.
Sintesis Fenetil (O-asetil-p-kumaroil) dari Asam p-kumarat melalui Asetilasi, Klorinasi dan Esterifikasi dengan Fenetilalkohol Bahja, Bahja; Firdaus, Firdaus; Soekamto, Nunuk H.
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-bah

Abstract

Synthesis of phenethyl (O-acetyl-p-coumaroyl) (4) from p-coumaric acid (1) using phenethylalcohol was succesfully conducted via acetylation (2), chlorination (3), and esterification (4). The acetylation was performed using acetic anhydride in pyridine at room temperature for 6 hours, the chlorination was performed using thionyl chloride in dry benzene by reflux at 75oC for 4 hours, continued with esterification by in situ using phenethylalcohol in dry dichloromethane at room temperature for 4 hours. The structure of each step reaction product was identified using FT-IR spectroscopy. The compound 2 was obtained as yellowish crystal with m.p 201-203oC and the compound 4 was obtained as white crystal with m.p 68-69oC.
Ekspresi inducible Nitric Oxide Synthase (iNOS) dalam Ginjal Ikan Mas (Cyprinus carpio. L) Setelah Paparan Linear Alkylbenzene Sulfonat (LAS) Borut, Ruku
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-ruk

Abstract

This study aims to determine the expression of iNOS in renal tissue of carp to contamination LAS (linear alkyl benzene sulfonate). The method used in this study is an experimental method using laboratory based study of molecular exploration. The experimental design used was completely randomized design (CRD), with exposure treatment LAS namely (A) 0.01 mg / L, (B) 0.02 mg / L, (C) 0.03 mg / L, (D) 0.04 mg / L, (E) 0.05 mg / L and control (without LAS). The parameters measured were the expression of inducible nitric oxide synthase (iNOS) in renal tissue cranial carp after 96 hours of exposure to LAS. Detection of iNOS in renal tissue cranial carp do with immunohistochemical methods. T-test results showed that iNOS expression in the kidney tissue cranial carp at each treatment LAS exposure was significantly higher (P <0.05) than controls. The mean value of iNOS expression in control cells was 6.25%, a 14.5% cell treatment, treatment and 21% of the cells, the cells C treatment 32.5%, 36.5% D treatment of cells, and treatment E 28.25% cell.
Sintesis Senyawa N-fenetil 4-O-asetil ferulamida dari Asam Ferulat melalui Reaksi Amidasi Tidak Langsung Islam, Muhammad Fajar; Firdaus, Firdaus; Soekamto, Nunuk H.
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-muh

Abstract

Compound N-phenetyl 4-O-asetil ferulamide had been synthesized from ferulic acid and phenetylamine through esterification and indirect amidation method. Esterification reaction of ferulic acid with anhydride acetate was done in pyridine solvent at room temperature. Indirect amidation was perform by chlorination using tionyl chloride in benzene solvent at 70°C and continued by amidation with phenetylamine, catalyzed by pyridine in dichloromethane solvent at room temperature. the compound obtained is brown yellowish crystal with melting point 118-120°C. The rendemen of target compound is 53.81%.
Analisis Logam Berat Cd Dalam Alga Eucheuma cottoni Di Perairan Kabupaten Bantaeng Teheni, Muhammad T.; La Nafie, Nursiah; Dali, Seniwati
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-teh

Abstract

Algae is a plant which life in the marine with a lot of diversification such as: single and multi-cellular. Commonly, it contains chlorophyll without stem and roots. A species of algae in Indonesia which has high economic value is Eucheuma cottoni. It is cultured in Bantaeng as the central production of algae in South Sulawesi. The aim of this research is to know the concentration of heavy metals Cadmium in algae at region Bantaeng coastal. Concentration of cadmium was determined by atomic absorption spectrophotometer (AAS). This analysis was done by destruction process using concentrated HNO3. Sampling was done at 6 different location, they are: Nipa-nipa, Bakara, Boroloe, Tapaloe, Baruga village and Baruga from north to south. The experiment result show that the highest concentration of Cd is in Nipa-nipa village, with 0.2920 ppm and the lowest in Baruga village is 0.1824 ppm. The concentration of Cd in algae Eucheuma cottoni in those 6 different location had been more than limited which had been determined by the decision of national of environmental ministry number 51 year 2004, they are 0.01 and 0.05 ppm.
Analisis Senyawa Piren pada Alga Laut Eucheuma cottoni Di Perairan Kabupaten Bantaeng Yusuf, Evana Y.; La Nafie, Nursiah; Dali, Seniwati
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-eva

Abstract

The compounds pyrene is one of the polycyclic aromatic hydrocarbons (HAP) which is derived from petroleum. These compounds are carcinogenic and toxic for the marine biota. The purpose of this study to determine the levels of pyrene compounds in marine algae. In this research, analysis of pyrene compounds in marine algae Eucheuma cottonii using the method of GC - MS (Gas Chromatography - Mass spectrophotometry). Sampling was conducted in the waters the Bantaeng Regency with a 6 point sampling different locations namely Nipa-nipa, Bakara, Boroloe, Tapaloe, Baruga village and Baruga. The results showed that the concentration of pyrene compounds found in marine algae Eucheuma cottonii at 6 locations in waters the Bantaeng Regency has a concentration low enough pyrene compounds that is 0009-0063 ppm. This means that the concentration of pyrene was obtained below the threshold value determined by the decision of national of Environmental ministry for the marine life.
Pengaruh Konsentrasi AgNO3 dan Suhu Sintesis terhadap Surface Plasmon Resonance (SPR) Nanopartikel Perak R, Irwan; Zakir, Muhammad; Budi, Prastawa
Indonesian Journal of Chemical Research Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2016.4-irw

Abstract

The research aims to synthesis of silver nanoparticles (AgNPs) via bio-reduction method using mangosteen skin extract. The growth of AgNPs was characterized by ultraviolet-visible spectroscopy (UV-Vis). Based on Surface Plasmon resonance (SPR) data, observation suggested that an increase of initial AgNO3 concentration along with temperature, had affected its surface Plasmon resonance trend. SPR absorption indicates that the concentration of AgNO3 and the synthesis temperature was instrumental in the formation of silver nanoparticles.

Page 6 of 32 | Total Record : 314

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