cover
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota ambon,
Maluku
INDONESIA
Indonesian Journal of Chemical Research
Published by Universitas Pattimura
ISSN : 23385359     EISSN : 26142627     DOI : -
Indonesian Journal of Chemical Research (Indo. J. Chem. Res) is published twice every year, in January and July by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Pattimura University - Ambon. Ind. J. Chem. Res publishes original research papers, short communication, and review articles covering all aspects of chemistry including chemical engineering, chemical applications. Articles published in this journal are articles will not be published elsewhere, except abstracts, as course material, or research reports.
Arjuna Subject : -
Articles 255 Documents
Isolasi Mikroba Dari Air Asam Tambang Pada Area Pertambangan Tembaga Di Pulau Wetar, Provinsi Maluku Male, Yusthinus T.; Modok, Deddy W.S.; Seumahu, Cecilia A.; Malle, Dominggus
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.266 KB) | DOI: 10.30598//ijcr.2019.6-thi

Abstract

This research was conducted to find bacteria from the genus Acidithiobacillus ferrooxidans which isolated from mine acid water in the copper mining area on Wetar Island, Maluku Province. This bacterium will be utilized in the biohidrometallurgical process (bioleaching) for copper extraction in mining area. The results of this study indicate that bacteria can be isolated from mine acid water samples by enrichment method that was use liquid media from Leathen which is optimized using Trypton Soya Broth (TSB) and bacterial growth on solid media. The presence of Thiobacillussp bacteria was confirmed by the results of gene analysis using a 16S rRNA sequence showing the presence of mixed bacterial colonies but not a single colony.
Analisis Kandungan Zat besi (Fe) Pada Daun Kelor (Moringa oleifera Lam.) Yang Tumbuh dengan Ketinggian Berbeda di Daerah Kota Baubau Hamzah, Hasty; Yusuf, Nur Rahmah
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.992 KB) | DOI: 10.30598//ijcr.2019.6-has

Abstract

Moringa oleifera Lam. is ones of the multipurpose plants. All parts of the plants are useful to human life and efficacious as a medicine. Moringa oleifera Lam can grow in the lowlands and highlands to an altitude of 1000 masl. This study was conducted to determine the levels of iron (Fe) in Moringa oleifera Lam leaves that grew at different heights using Atomic Absorption Spectroscopy (AAS) the results shows the amount of iron (Fe) in the lowlands of 14 masl (Wameo Village) is 6.28 mg per 100 g of Moringa leaf, medium plains 58 masl (Kantalai Village) is 5.57 mg per 100 g of sample while in the highlands 318 masl (Kaisabu Subdistrict) is 3.86 mg per 100 g of sample. Factors that influence the amount of iron content in Moringa oleifera Lam leaves are height which further affects the intensity of sunlight, humidity. Other factors can be caused by soil conditions (texture, moisture, nutrient, and pH).
Perbandingan Sifat Feroelektrik Pada Sintesis Oksida Logam Aurivillius SrBi4Ti4O15 Empat Lapis Dengan Metode Hidrotermal Karnelasatri, Karnelasatri; Mikrianto, Edi
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (676.682 KB) | DOI: 10.30598//ijcr.2019.6-kar

Abstract

Aurivillius compounds, SrBi4Ti4O15 (SBT four layers) have been synthesized by hydrothermal method at 200℃ with variation of times 48 hours, 72 hours and 96 hours. Single phase of SrBi4Ti4O15 Aurivillius compounds obtained at the 200 ˚ C, 96 hours and the concentration of NaOH 3M. The Rietica program shown the index Miller result is 1 1 5 1 1 3, 0 2 0, 0 2 4, 2 0 8 2 2 0, 0 2 1 0, 3 1 6, 1 1 1 6 and the space group is A21am with the orthorhombic crystal system. Cell parameters are a = 5.5754 Å, b = 5.5456 Å, c = 41.3642. Ferroelectric properties show the value of remanent polarization Pr (+) and Pr (-) 4,61 C/cm2 and 2,75 C/cm2 and that is much lower than the value of remanent polarization of other material that have been synthesized at 240℃, 72 hours with the same method.
Studi Variasi Konsentrasi NaOH dan H2SO4 Untuk Memurnikan Silika Dari Abu Sekam Padi Sebagai Adsorben Ion Logam Pb2+ dan Cu2+ Harimu, La; Rudi, La; Haetami, Aceng; Santoso, Giswa Ayu Pratiwi; ., Asriyanti
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.836 KB) | DOI: 10.30598//ijcr.2019.6-lah

Abstract

A study of variations in the concentration of NaOH and H2SO4 to purify silica from rice husk ash and its application as adsorbent of Pb2+ and Cu2+ Metal Ions. The NaOH concentrations used were 8%, 9%, 10%, 11%, 12% and 13% and H2SO4 concentrations were 5.4%, 8.16%, 10.88%, and 13.61%. The process of adsorption of Pb2+ and Cu2+ metal ions was carried out at pH (3, 4, 5, 6) and silica masses. The results showed the silica yield obtained in the form of white powder. The highest silica content at 12% NaOH concentration of 41.81% with a purity of 89.09% and H2SO4 concentration is 10.88% at 65.39% with a purity of 94.94% initial content 86.02%. The results of surface structure characterization using Scanning Electron Microscope (SEM) average size of particle diameter was 0.030 µm. Optimal adsorption process of Pb2+ and Cu2+ metal ions using silica from rice husk occurred at pH 6 and the adsorbent mass was 0.3 gram, the adsorption efficiency was 98% and 86.25% respectively with adsorption capacity of 0.96 mg/g for metal Pb2+ and 0.83 mg/g for Cu2+ metals.
Validasi Metode Penentuan Mn Dalam Oli Lubrikan Dengan Metode Pengenceran Langsung Menggunakan Spektrofotometer Serapan Atom Napitupulu, Rona Maningting; Julia, Dirgarini; Panggabean, Aman S.
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.867 KB) | DOI: 10.30598//ijcr.2019.6-ama

Abstract

Validation method on the determination of Mn in lubricating oil by direct dilution method using Atomic Absorption Spectrophotometer (AAS) in Laboratory & Environment Control PT. Badak NGL Bontang has been done The validation method was done with research stages such as determination of  optimum solvent, and determination of some important parameters influential for validation method such as parameter of liniearitas (r), Instrument Detection Limit (IDL), Methode Detection Limit (MDL), accuracy, precision, Limit of Detection(LOD) and Limit of Quantitation(LOQ). The result of research obtain is good, showed that the linearity value with R2 ≥ 0,997. The IDL and MDL value was 0.0021 ppm and 0.0092 ppm respectively and has been acceptability requirements of MDL. The accuracy paramater obtained recovery value with range 82.25-88.34%. The measurement of repeatability and reproducibility, the CV Horwitz value smaller than % RSD, indicating the method had a good precision. The measurement of  LOD and LOQ value was 0.095 ppm 0.317 ppm respectively. Based on the result of the research determination method of Mn in lubricating oil by direct dilution method using AAS concluded valid.
Studi Kinetika Efektifitas Minyak Daun Cengkeh (Syzigium aromaticum) Sebagai Antifungi Candida albicans Musta, Rustam; Nurliana, Laily
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (334.538 KB) | DOI: 10.30598//ijcr.2019.6-rus

Abstract

Kinetic studies effectiveness clove leaf (Syzigium aromaticum) oil as antifungal Candida albicans have been done. The study have purpose to determine the reaction order, reaction constants (k) and relationship the concentration of clove leaf (Syzigium aromaticum) oil every time (At) with the initial concentration of of clove (Syzigium aromaticum) oil (Ao) and time (t) and equipped determination of the minimum concentration of clove leaf (Syzigium aromaticum)oil effective anti-fungus Candida albicans. The results shows the anti-fungal activity clove leaf (Syzigium aromaticum) oil on Candida albicans for each variation of the concentration 100%, 75%, 50% and 25% are 14.2 mm, 12.2 mm, 10.8 mm and 10.4 mm respectively. Reaction order as antifungal of the clove leaf (Syzigium aromaticum) oil on Candida albicans is 0.2112 with k = 5.0594. The minimum concentration of clove leaf (Syzigium aromaticum) oil as anti-fungal Candida albicans is 17.86%.
Studi Kinetika Antibakteri dari Hasil Pirolisis Cangkang Biji Jambu Mete terhadap Staphylococcus aureus Nurliana, Laily; Musta, Rustam
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.529 KB) | DOI: 10.30598//ijcr.2019.6-nur

Abstract

Research on kinetics antibacterial from pyrolysis product of cashew nut shell againts Staphylococcus aureus have been carried out. Cashew nuts are prepared by separating the shell and seeds for pyrolysis. The results of S. aureus antibacterial activity test results pyrolysis pyrolysis products shell cashew nut showed inhibition is different for each variation of the concentration of 12.5%, 25%, 50%, 75% and 100% with inhibition of successive 0.87; 0.97; 1.38; 1.47 and 1.61 (cm). Based on these results it can be said that the result of the pyrolysis of cashew nut shells provide a response inhibition that were at concentrations of 12.5 and 25%. While the concentration of 50%, 75%, and 100% response inhibitory power is included in the strong category on the growth of S. aureus. Order the reaction of the antibacterial activity of S. aureus from the pyrolysis products obtained cashew nut shell 0,3 with activity rate constant of 0.38. The concentration of pyrolysis products of pyrolysis results cashew nut shell the minimum recommended for use as an antibacterial S.aureus.
Penambatan Molekuler α, β, dan γ-mangostin Sebagai Inhibitor α-amilase Pankreas Manusia Gaspersz, Nelson; Sohilait, Mario Rowan
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (583.046 KB) | DOI: 10.30598//ijcr.2019.6-nel

Abstract

In silico studies on interactions between the human pancreatic α-amylase (HPA) enzyme with α, β, and γ-mangostin ligands has been carried out using the molecular docking method. Ligands α, β, and γ-mangostin interact through the formation of hydrogen and van der waals bonds with residues on the enzyme active side. The α-mangostin ligands form seven hydrogen and six van der waals bonds with residues involved were Trp59, Gln63, Trp96, Thr163, Thr164, Ala198, His201, Glu233, and Asp300; β-mangostin forms five hydrogen and eight van der waals bonds with residues involved were Gln63, Trp96, Thr163, Thr164, Arg195, Asp197, His201, Glu233, Asp300, and His305; while γ-mangostin forms nine hydrogen and five van der waals bonds with residues involved were Trp59, Gln63, Trp96, Thr163, Asp197, Ala198, His201, Glu233, and Asp300. The binding afinity of α, β, and γ-mangostin to the HPA obtained were -7.0; -6.6; and -7.4 kcal/mol with RMSD value were 1,850; 1,956; and 1,811 Å, respectively. The number of hydrogen bonds that can be formed was responsible to the binding affinity. Ligand γ-mangostin has potential activity as an inhibitor of HPA enzyme due to the stable complexes formation with lower binding affinity (validated with RMSD value) when compared to α and β-mangostin.
Application of TiO2 Nanotube As Photoelectrode For Corrosion Prevention Of Stainless Steel In pH Variation of NaCl Misriyani, Misriyani; Wahab, Abdul Wahid; Taba, Paulina; Gunlazuardi, Jarnuzi
Indo. J. Chem. Res. Vol 3 No 1 (2015): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (330.508 KB)

Abstract

The research amis to synthesize TiO2 nanotube photoelectrode (TiO2-NT) by anodizing method. The photoelectrodes applied in photoelectrochemical system to prevent the corrosion of steel. Anodizing method carried out by preparing an electrochemical system consisting of a titanium plate as anode and Pt wire as cathode in electrolyte containing glycerol, ammonium fluoride and water. Voltage applied from the DC current source and followed by thermal treatment at a temperature of 500oC. The photoelectrode further characterized by using X-Ray Diffraction and Surface Area Analyzer. The result of anti-corrosion test of stainless steel 304 by TiO2-NT showed that photopotential value of steel shifted to the more negative value in UV light. The significant potential shift occurs at pH 8 and the corrosion rate of stainless steel 304 couple with TiO2-NT decrease reaches 1.7 times. It concluded that the photoelectrodes can be used to reduce the corrosion rate of stainless steel 304 by utilizing sollar energy as a source of UV light.
Synthesis of Binuclear Complex Compound of {[Fe(L)(NCS)¬2]2oks} (L = 1,10-phenantrolin and 2,2’-bypiridine) Male, Yusthinus T; Tehubijuluw, Helna; Pelata, Paulina M.
Indo. J. Chem. Res. Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.815 KB)

Abstract

The paramagnetic complex {[Fe(fen)(NCS)2]2oks} have been synthesized in methanol solution using 1-10 phenantrolin, 2,2 -bipyridine, NCS- ligands and oxalate as bridging ligand. Synthesis of Fe (II) with ligands phenantrolin produced three complexes is paramagnetic compounds each with a value of magnetic moment (μ) of 5.98 BM, 7.34 BM and 6.00 BM, respectively. For complexes with bipyridine ligand complexes obtained two diamagnetic compounds with the magnetic moment (μ) was 3.57 BM and 3.50 BM, respectively. It could concluded that the field strength of bipyridine ligand cannot be reduced by NCS- ligand. Analysis results showing that the synthesized compound is a binuclear complex with {[Fe(fen)(NCS)2]2oks} molecular formula. This conclusion was supported by the measurement of conductivity, magnetic moment, IR spectroscopy and XRD analysis.

Page 1 of 26 | Total Record : 255


Filter by Year

2013 2020


Filter By Issues
All Issue Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May) - Articles in Press Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May) Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) Vol 7 No 1 (2019): Edisi Bulan Juli (Edition For July) Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January) Vol 7 No 1 (2019): Articles in press Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January) Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July) Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January) Vol 6 No 1 (2018): Edition For July Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July) Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January) Vol 5 No 1 (2017): Edisi Bulan Juli (Edition For July) Vol 4 No 2 (2017): Edisi Bulan Januari (Edition For January) Vol 5 No 1 (2017): Edisi Bulan Juli (Edition For July) Vol 4 No 2 (2017): Edisi Bulan Januari (Edition For January) Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July) Vol 3 No 2 (2016): Edisi Bulan Januari (Edition for January) Vol 4 No 1 (2016): Edisi Bulan Juli (Edition For July) Vol 3 No 2 (2016): Edisi Bulan Januari (Edition For January) Vol 3 No 1 (2015): Edisi Bulan Juli (Edition For July) Vol 2 No 2 (2015): Edisi Bulan Januari (Edition for January) Vol 3 No 1 (2015): Edisi Bulan Juli (Edition For July) Vol 2 No 2 (2015): Edisi Bulan Januari (Edition For January) Vol 2 No 1 (2014): Edisi Bulan Juli (Edition For July) Vol 1 No 2 (2014): Edisi Bulan Januari (Edition for January) Vol 2 No 1 (2014): Edisi Bulan Juli (Edition For July) Vol 1 No 2 (2014): Edisi Bulan Januari (Edition For January) Vol 1 No 1 (2013): Edisi Pertama (First Edition) Vol 1 No 1 (2013): Edisi Pertama (First Edition) More Issue