Chemistry Indonesian Journal of Chemical Research
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.
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314 Documents
<![CDATA[Mekanisme Teoritis Pembentukan Senyawa Siklik Hidrokarbon dari Reaksi C4H5 dan C4H2 ]]>
<![CDATA[Indarto, Antonius]]>;
<![CDATA[Handojo, Lienda]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.7-ant
<![CDATA[Acetylene and polyyne are intermediates in the formation of Polycyclic Aromatic Hydrocarbons (PAHs) and soot in combustion or pyrolysis. PAH formation from acetylene is known as the most adopted pathway because it has a low reaction energy. Another mechanism for the formation of PAH is a mechanism that involves polyyne or known as a radical pathway, proposed by Krestinin. This pathway involves the reaction of alkyne + alkenes which results in the addition of radical sites to the molecular structure. In this study, the two reaction mechanisms will be compared. Electronic features and energy requirements of the reaction process will be evaluated using molecular computational studies based on electron density (DFT). In combustion conditions (high temperature), the formation of radical sites requires relatively little energy, with a range of 2-5 kcal/mol. This is very different when compared to the energy profile for the same reaction at room temperature. From this study, it can be concluded that the mechanism of radical growth has the potential to occur in combustion reactions.Polycyclic aromatic hydrocarbons, radical growth, combustion, polyyne.]]>
<![CDATA[Stability Indicating RP-HPLC for Quantification Mangiferin in Extract of Three Species Mango Leaves ]]>
<![CDATA[Retnaningtyas, Yuni]]>;
<![CDATA[Kristiningrum, Nia]]>;
<![CDATA[Renggani, Hidayah Dwi]]>;
<![CDATA[Sary, Indah Purnama]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.8-yun
<![CDATA[The stability indication of Reversed Phase-High Performance Liquid Chromatography (RP-HPLC) method was validated for quantitative determination of mangiferin on three species mango leaves (Mangifera odorata Griff, Mangifera foetida Lour, and Mangifera indica L.). The samples were extracted by maseration method using methanol and concentrated using rotary evaporator. The method carried out on stationary phase a purospher RP-18 endcapped (25 cm × 4.6 mm i.d., 5 µm) column with a mobile phase consisting of methanol: phosphoric acid 0.1% (v/v) (31:69); flow rate:0.8 mL/min; solvent methanol, detection was carried out at 258 nm. The analytical performace this measurement is good with the value of linearity (r2=0.998), precision (%RSD=0.649%), and accuration (10.67%). The forced degradation studies were carried out according to the International Conference on Harmonization (ICH) guidelines. The results indicating that the complete separation between degradation products and mangiferin peak occured. The degradation limit of mangiferin 5–20% (according to the guideline of ICH) except in basic condition (100%). The method was succesful applied to determine of the mangiferin in pakel (Mangifera foetida), kweni (Mangifera indica) and kopyor (Mangifera odorata) extract. The mangiferin content was obtained are pakel (9.95%), kopyor (7.40%) and kweni (Mangifera odorata) (2.49%) respectively.]]>
<![CDATA[Sintesis Nanopartikel Perak dan Pengaruh Penambahan Asam p-Kumarat Untuk Aplikasi Deteksi Melamin ]]>
<![CDATA[R, Irwan]]>;
<![CDATA[Zakir, Muhammad]]>;
<![CDATA[Budi, Prastawa]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.7-irw
<![CDATA[Biosynthesis of silver nanoparticles (AgNPs) using mangosteen bark extract, modification and its application in detecting melamine has conducted. This research aimed to synthesize AgNPs via bio-reduction method using mangosteen bark extract followed by modification with p-coumaric acid (APK), and evaluating its application detecting melamine. The AgNPs were characterized through ultraviolet-visible absorption spectroscopy (UV-Vis), Fourier transform infrared absorption spectroscopy (FTIR), and X-ray diffraction (XRD). Observation suggested that an increase of incubation time had affected its surface Plasmon resonance trend. Observation of functional group by FTIR showed that carbonyl group (1707 cm-1) suspected from hydroxyl group (3414 cm-1). Further analysis of crystallite via XRD suggested that nanoparticle size at 30 nm estimated using Debye-Scherer, within the form of unit cells is cubic. Modified AgNPs showed an interaction between APK and particle surface through C=C alkenes (1598 cm-1) and aromatics (1672 cm-1), =C-H aromatic (3070 cm-1), aliphatic C-H (2501 cm-1), C-O (1107 cm-1) and C=O carboxylate (1774 cm-1). The performance of product as melamine detector suggested that the AgNPs-APK had detected melamine in range of concentration from 0.1 to 1000 ppm.]]>
<![CDATA[Potensi Antibakteri Ekstrak Daging Buah Kelubi (Eleiodoxa conferta) Bangka Belitung Menggunakan Microwave-Assisted Extraction (MAE) ]]>
<![CDATA[Surtina, Surtina]]>;
<![CDATA[Sari, Ratih Puspita]]>;
<![CDATA[Zulita, Zulita]]>;
<![CDATA[Rani, Rani]]>;
<![CDATA[Roanisca, Occa]]>;
<![CDATA[Mahardika, Robby Gus]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.7-sur
<![CDATA[Antibacterial tests were carried out using ethanol extract of kelubi meat (Eleidoxa conferta), extraction using the Microwave-Assisted Extraction method with a ratio of 2: 20 for 30 minutes at 60 °C. Antibacterial tests using diffusion methods with concentrations of 20%, 40%, 60%, 80%, and 100%; positive control of 0.005% amoxillin and DMSO negative control. Antibacterial test results showed that the inhibition zone of ethanol extract in E. coli bacteria with a concentration of 20% was in the moderate category, for a concentration of 40% including the strong category while the concentration of 60%, 80% and 100% was very strong. The inhibition zone of ethanol extract for the S. aureus bacterium with a concentration of 20% is included in the strong category while the concentration of 40%, 60%, 80%, and 100% is categorized as very strong. From these results it can be concluded that the inhibitory zone in Stapylococcus aureus bacteria is greater than that of E. coli bacteria.]]>
<![CDATA[Karakterisasi Biopolimer Kitosan Hasil Deasetilasi Limbah Kepiting Rajungan (Portunus Sanginolentus) Menggunakan NaBH4 Dalam NaOH ]]>
<![CDATA[Hasanela, Nurani]]>;
<![CDATA[Tanasale, Matheis F.J.D.P.]]>;
<![CDATA[Tehubijuluw, Helna]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.8-nur
<![CDATA[The chitosan isolation from crab crab waste (Portunus sanginolentus) has been carried out. Chitin production is carried out by the de-proteination, demineralization and depigmentation processes. Chitosan biopolymer is produced from chitin through de-acetylation method using base solution (NaOH) and the addition of NaBH4 which aims to increase the degree of de-acetylation (DD) of chitosan. The results of 25 g of chitin obtained chitosan amounted to 16.67 g (66.68%). Chitin and Chitosan were identified by a Fourier Transform Infrared (FT-IR) spectrophotometer.]]>
<![CDATA[Pemodelan Homologi Komparatif FABP Belalang Kembara (Locusta migratoria) Dengan PHYRE2 dan Skrining Virtual Inhibitor Potensial ]]>
<![CDATA[Saudale, Fredy Z]]>;
<![CDATA[Suatu, Irenes R.S.]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.7-fre
<![CDATA[The outbreak of locusta migratoria has caused a local crisis in production and cultivation of agricultural crops in East Nusa Tenggara Province. FABP (Fatty Acid-Binding Protein) plays an important role in transporting fatty acids from cytoplasm into mitochondria to generate ATP energy for locusta to fly and migrate. FABP inhibition is an attractive strategy to be exploited for novel insecticide development. Comparative homology modeling using Phyre2 had been used to generate two FABP models built from desert locusta (Schistocerca gregaria, 98% percent identity) and mice (Mus musculus, 40% percent identity) FABP protein as templates. Both FABP models showed an acceptable quality of stereochemistry and structural energy with lower atomic clash scores after refinement. Virtual screening identified potent inhibitor candidates with highest affinity energies which are (i) a heterocyclic compound C00628966 (-10.2 kcal/mol) and (iii) an imidazole derivative C15721579 (-8.5 kcal/mol) that were stabilized through a hydrogen bond with Ser53 also (iii) a pyrimidine derivative C73698912 (-8.1 kcal/mol) stabilized through hydrogen bonds with Thr57, Thr62 and Ser55. Their interactions resemble inhibitors that have been known to inhibit homologous FABP in humans. Therefore, these compounds warrant further in vitro validation and assay for development of selective insecticides to control locusta population.]]>
<![CDATA[Bioremediation of Pb and Cd Metal from Inner Ambon Bay Sediment Which Contaminated With Heavy Metal Using Aspergillus niger ]]>
<![CDATA[Male, Yusthinus T]]>;
<![CDATA[Seumahu, Cecillia Anna]]>;
<![CDATA[Malle, Dominggus]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.7-yus
<![CDATA[Bioremediation is a method that use microorganism to extract heavy metal from contaminated waste. In this research Aspergillus niger was used to extract heavy metal such as Pb and Cd of marine sediment from Waiheru shore, Inner part of Ambon Bay, which was detected as significantly high heavy metal contaminated site among seven sites. Bioremediation were done using Aspergillus nigers to extract Pb and Cd metal from sediment, then their solubility being measured in filtrate media. Result shows that Cd metal were only detected 15 days after incubation while Pb were detected since the first day incubation. This result also showing the fluctuating solubility of Pb metal. It is suspected that this occurs due to biosorption ability of the fungi that being used which triggers metal accumulation in the cell structure. It is therefore can be concluded that Aspergillus niger can be used in bioremediation of sediment that are being contaminated by Pb and Cd heavy metals.]]>
<![CDATA[Identifikasi Batuan PAF, NAF dan UNCERTAIN dengan Menggunakan Metode NTAPP Pada Area PT. Trubaindo Coal Mining, Melak-Kalimantan Timur ]]>
<![CDATA[Irviansyah, Alfian]]>;
<![CDATA[Sitorus, Saibun]]>;
<![CDATA[Panggabean, Aman Sentosa]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.7-alf
<![CDATA[The research about identification of PAF, NAF and uncertain rock using NTAPP method in the PT. Trubaindo Coal Mining has been done. This research was conducted as an effort to control the potential for the formation of acid mine drainage, with identifying the types of mine rocks using certain testing methods. Some important parameters such as Total Sulfur Level, Slurry pH, Total Actual Acidity (TAA), Chromium Reducible Sulfur (CRS) and Acid Neutralizing Capacity (ANC) using the NTAPP method on mine rocks have been determined to identify mining rock category categories. Based on the results of tests on 101 samples, 63 samples were identified included in the category of rocks that are not NAF (Slurry pH value = 4.1 - 8.9; Total Sulfur = 0.01-0.60 %; CRS = 0.01-0.10 % and NTAPP = 0.030-0.959 %), 38 samples were classified as PAF (pH Slurry = 2.9-7.9; Total Sulfur = 0.01-5.10 %; CRS = 0.11-2.04 % and NTAPP = 0.053-4.571 %), and no sample was included in the uncertainty category.]]>
<![CDATA[Variasi Jarak Antar Layer Bentonit Pada Pembuatan Nanokomposit Pla-Bentonit Sebagai Kemasan Makanan ]]>
<![CDATA[Wonoputri, Vita]]>;
<![CDATA[Emanuella, Natasha]]>;
<![CDATA[Angelica, Evelyn]]>;
<![CDATA[Sitompul, Johnner]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.8-vit
<![CDATA[In this study, bentonite was used as a filler in the synthesis of polylactic acid (PLA) nanocomposite. The mechanical property of PLA-Bentonite nanocomposite was treated using two different surfactants, namely octadecyl amine (ODA) and trimethyl stearyl ammonium chloride (TSC) at two different concentration (20 mmol and 40 mmol). The treatments of ODA and TSC in the matrix with regards to the basal spacing of bentonite stacks measured by X-Ray Diffraction (XRD) analysis. The results showed a significant increase in basal spacing was obtained when TSC 40 was applied for treatment. Data of Fourier Transform Infrared Spectroscopy (FTIR) suggested that this increase was caused by the incorporation of surfactant into the bentonite stacks. Most of the PLA-Bentonite nanocomposite can form intercalation structure, while a sample containing TSC 40 formed exfoliation structure. This exfoliation structure resulted in a film with the best tensile strength and water vapor permeability compared to the others. The film containing TSC 40 showed the lowest reduction in water activity, almost similar to the bread sample wrapped using conventional plastic. The bread wrapped with TSC 40 film was not grown by fungi as opposed to the conventional plastic, showing the potential of the nanocomposite film as food packaging.]]>
<![CDATA[Kinetika Reaksi Hidrogenasi Ester Lemak Menjadi Alkohol Lemak Dengan Katalis Tembaga- Mangan ]]>
<![CDATA[Gunawan, Melia Laniwati]]>;
<![CDATA[Makertihartha, IGBN]]>;
<![CDATA[Subagjo, Subagjo]]>
<![CDATA[ Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May) ]]>
Publisher : <![CDATA[Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura ]]>
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DOI: 10.30598/ijcr.2020.8-mel
<![CDATA[Fatty alcohol (FAOH) can be produced by hydrogenating of fatty acid methyl ester (FAME) using the copper-based catalyst. Copper-Chrom (Cu-Cr) is the best catalyst for high-pressure reaction condition, which is copper (Cu) as the main active component and chrom (Cr) as a promoter. Since Cr is feared to be toxic, one of the best replacement candidates is manganese (Mn). The research aims is to find the kinetic equation of hydrogenation FAME to FAOH using a Cu-Mn commercial catalyst. FAME with methyl laurate and methyl myristate as the main compounds is used as feedstock. The main products are lauryl alcohol and myristyl alcohol. The reaction was carried out in an isothermal continuous fixed bed reactor under conditions of temperature 220 – 240 oC, pressure 50 bar, and liquid hourly space velocity (LHSV) 5-12.5 hr-1. The kinetic equation is determined using the power law model. The FAME hydrogenation on copper - manganese catalyst is the half order reaction. The activation energy value is 86.32 kJ/mol and the Arrhenius constant value is 5.87x106 M0.5/s.]]>
