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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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Kondisi Optimum Biosorpsi Sisik Ikan Kakap Merah (Lutjanus argentimaculatus) Terhadap Zat Warna Rhodamin B Fransina, Eirene; Latupeirissa, Jolantje
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-eir

Abstract

The research of rhodamine B dye biosorption by Red Snapper’s scale (Lutjanus argentimaculatus) powder has been done. The red snapper’s scales were cleansed with aquades and dried. The dried red snapper’s scales were grinded and sieved to powder with a 100 mesh sieve. The powder of red snapper’s scale was dried at 100 °C in oven for an hour. The biosorption process toward rhodamine B dye and its results were examined with UV-Vis spectrophotometer. The optimum condition of red snapper’s scale powder for 1.0 g of absorbent has biosorption capacity in amount of 92.740%; the optimum contact time is 120 minutes with biosorption capacity in amount of 97.264%; for 50 ppm biosorption concentration has biosorption capacity in amount of 95.598% and the optimum pH of 3 has biosorption capacity of 97.930%.
Biosintesis Nanopartikel Perak menggunakan Ekstrak Daun Ketapang, Modifikasi dengan Asam p-kumarat untuk Aplikasi Deteksi Melamin Rusnaenah, Andi; Zakir, Muhammad; Budi, Prastawa
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-and

Abstract

Biosynthesis of silver nanoparticles (AgNPs) using ketapang leaf extract, modification with p-coumaric acid for detecting melamine has conducted. This research aimed to synthesize AgNPs via bio-reduction method using ketapang leaf 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) and X-ray diffraction (XRD). Observation suggested that an increase of incubation time had affected its surface Plasmon resonance trend. Further analysis of crystallite via XRD suggested that nanoparticle size at 43 nm estimated using Debye-Scherer, within the form of unit cells is cubic. 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.
Toksisitas Oligomer Kitosan Derajat Deasetilasi Rendah Enzimatis Menggunakan Metode Brine Srimp Lethality Test (BSLT) Sarni, Sarni
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-sar

Abstract

Chitosan oligomers or chitooligomer is a mixture of oligomers of D-glucosamine which are formed through a process of depolymerization of chitosan with cuting its β-glycosidic bonding. Chitosan oligomer has received much attention in various fields because of the specific biological activity 10 times greater than chitosan. Chitosan oligomer having biological activity as antibacterial, antiviral, antioxidant, anti-tumor and anti-cancer. Before it is applied to humans, the bioactive compounds to be used as pharmaceutical products must pass a preliminary test using test animals. BSLT method is often used to praskrining against bioactive compounds. This method uses shrimp larvae are widely used in searches that are toxic bioactive compounds from natural materials. This study aims to determine the toxicity of chitosan oligomers enzymatic (crude) as a preliminary test before being used as a pharmaceutical product either as anti-cancer or anti microbial with BSLT method. The results showed chitosan oligomer (crude) hydrolysis of leather tiger shrimp chitosan (DD 60%) with chitosanase enzyme for each time of incubation has strong toxicity properties with a value of 36.90 ppm LC50 (1 hour incubation); 47.43 ppm (incubation 2 hours) and 104.86 ppm (incubation 3 hours).
Uji Fitokimia dan Toksisitas Ekstrak Etil Asetat Kulit Batang Melochia umbellata (Houtt) Stapf. var. Visenia dengan Metode Brine Shirmp Lethality Test (BSLT) Ahmad, Fauziah; Soekamto, Nunuk H.; Firdaus, Firdaus
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-fau

Abstract

Melochia umbellata (Houtt) Stapf. var. Visenia is plant species included in Malvaceae family. This spesies is known as paliasa and used as traditional medicine by the people of South Sulawesi. This study aimed to determine the secondary metabolites by reagents and toxicity characteristic testing from bark extract of Melochia umbellata (Houtt) Stapf. var. Visenia using Brine Shirmp Lethality Test (BSLT) method. The extract was prepeared by maceration ethyl acetate. Phytochemical test result showed that the ethyl acetate extract was containing the steroid compound, alkaloids and terpenoids. Toxicity test performed by shrimp Artemia salina Leach larvae was at 48 hours. The toxic effects of the extract were identified by the percentage of the number of shrimp larvae mortality using probit value analysis (LC50). The toxicity test of bark Melochia umbellata (Houtt) Stapf. var. Visenia extract showed that the ethyl acetate extract is toxic to A. salina LC50 = 54,55 mg / mL.
Uji Fitokimia dan Toksisitas Ekstrak Kloroform Kulit Batang Melochia umbellata (Houtt.) Stapf var. Visenia dengan Metode Bhrine Shrimp Lethality Test (BSLT) Aeni HM, Nur; Soekamto, Nunuk H.; Firdaus, Firdaus
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-shr

Abstract

Paliasa plants Melochia umbellata (Houtt.) Stapf var. Visenia is classified into species M.umbellata (Houtt.) Stapf which was potent to heal various of illness. The aim of this research to know secondary metabolites and its toxicity from extract chloroform stem bark of M. umbellata (Houtt.) Stapf var. Visenia. The step in this research were: maceration to obtain extract chloroform, phitotochemical assay to identify the group of secondary metabolites, and toxicity assay by using Bhrine Shrimp Lethality Test method. It was obtained 46 g of green concentrated exctract of chloroform. The result of phytochemical assay show that the extract contain steroid and alkaloid groups. The crude extract chloroform is toxic against Artemia salina with LC50 value is 53,57 µg/ml.
Mikroenkapsulasi Minyak Atsiri Dari Tanaman Nilam (Pogostemon cablin Benth) Sebagai Antijamur Candida albicans Risnawaty, Risnawaty; Nurliana, Laily; Kurniawati, Desy
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-ris

Abstract

Microencapsulation of essential oils from nilam plants (Pogostemon cablin Benth) for antifungal of Candida albicans was carried out. The aims of this study were to know of chemical components, characteristics, and activity test of nilam plants as well as the result test of microencaptulation as antifungal of C. albicans. Nilam essential oils was obtained by using water-vapor destilation with the rendament of 0.88%. Charateristics of nilam essential oils obtained produced are density of 0.947 mg/L, refractive index of 1.506, acid number of 1.122, and dissolved in alcohol 70 and 90% has conducted by Indonesia National Standar. Microencapsulation of nilam essential oils by using spray drying method with the various of the wrapper material of nilam essential oils:maltodextrin (1:12;1:10;1:8) produced solid powders with sticky texture and creamy which giving a spesific aroma of nilam oils. The activity test of antifungal of C. albicans test on liquid essential oil any diffence significantly each various of concentration of 12,5; 25; 50; and 100%. The activity of microcapsule showed that the difference specifically on various of concentrations of 1:12; 1:10 and 1:8 with the good activity power is composition of 1:12. Activity test result showed is any difference significantly between nilam oils and microcapsule.
Fotodegradasi High Density Polyethylene Yang Mengandung Aditif Okso-Biodegradasi Asriza, Ristika O.; Pitulima, Janiar
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-ris1

Abstract

High Density Polyethylene (HDPE) is a type of plastic that widely used for packaging because it has good mechanical properties. HDPE is naturally non-biodegradable, and the consequence it will increase plastic waste that will damage the environment. To increase their biodegradability, it is necessary to add an oxo-biodegradation additive in the form of a stearate metal compound. This oxo-biodegradation additive is a chromophore that can absorb UV light. Polyethylene oxo-biodegradation films are prepared by mixing HDPE and cobalt stearate to homogeneous on various compositions. To know the effect of adding cobalt stearate into HDPE has done by photodegradation process. The polyethylene oxo-biodegradation film was given irradiation using UV light in the wavelength range 280-300 nm at room temperature for 10 days. After irradiation, in the ATR spectrum shows an absorption peak at 1712 cm-1 wavenumber indicatied the presence of a carbonyl group with a stronger intensity. The higher concentration of cobalt stearate added in HDPE, increases the peak intensity of carbonyl group. This is due to the increasing number of chromophores from cobalt stearate that can absorb UV light, the faster the breakdown of HDPE chains into small fragments so that HDPE is rapidly degraded in nature.
Minyak Biji Nyamplung (Calophyllum inophyllum) Dengan Etanol Rezki, Rezki; Musta, Rustam; Haetami, Aceng
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-rez

Abstract

A study has been conducted on the transesterification of Calophyllum innophyllum seed oil with ethanol. The purpose of this research is to determine the comparison of concentration of phosphoric acid used to remove the gum on the oil, ester content is produced in the process of transesterification with ethanol, the ester yield obtained after the final stage of the transesterification process, the viscosity of the biodiesel produced, moisture content of biodiesel is produced, and density of biodiesel was produced. This research is taken based on consideration production biodiesel by direct transesterification process. Based on research result of good phosphoric acid concentration used to remove oil gum is 85%, volume of biodiesel produced at transesterification equal to 150 mL with yield 80,89%, biodiesel quality parameter measured that viscosity = 0,05 mm2 / s not fulfill Indonesian National Standart (INS), moisture content = 0.045 meets the INS and the density = 0.881 g / cm3 meets the INS
Biodiesel Hasil Transesterifikasi Minyak Biji Nyamplung (Calophyllum inophyllum) Dengan Metanol Musta, Rustam; Haetami, Aceng; Salmawati, Mimi
Indonesian Journal of Chemical Research Vol 4 No 2 (2017): 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.2017.4-rus

Abstract

Study of the transesterification of Calophyllum innophyllum seed oil from Kendari with methanol has been conducted. The purpose of the research to determine of the yield of ester produced in transesterification process with methanol, the viscosity of biodiesel produced, moisture content of biodiesel produced, density of biodiesel produced. The methods used in this study are sample preparation, transesterification process, biodiesel quality parameter test consisting of viscosity, moisture content and density. The results showed that good concentration of phosphoric acid was used to remove the gum is 85%, the yield of ester produced in the process of transesterification with methanol is 111,647%, parameter of biodiesel quality measured that viscosity = 0,315 mm2/ s not fulfill Indonesian National Standart (INS), water content is 0.02 meets the INS and the density = 0.8725 g / cm3 meets the INS standard
Validasi Metode X-Ray Fluorescence untuk Analisis Ion Fe dalam activated Methyl Diethanol Amine (aMDEA) Panggabean, Aman S.; Rachman, Arief
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-ama

Abstract

A research about validation method of Fe analysis in activated Methyl Diethanol Amine (aMDEA) using X-Ray Fluurescence (XRF) has been done. Analysis of Fe ion in aMDEA was performed to find out the rising of Fe in aMDEA that will show corrosion or metal erosion is caused by aMDEA degradation and contamination or accumulation from heat stable salt that can dissolve or scrape the film coat in carbon steel. Validation is done consist of linearity, accuracy, precision, limit of detection, and limit of quantitation. The analytical performance of the XRF for determination of Fe ions is good, shown as coefficient of correlation are 0.9997, repeatability as % RSD value are 1,93 % less than 2/3 CV Horwitz 6.24 %, percentage of recovery are 103.35 % . The LOD and LOQ are 0.351 and 2.975 ppm respectively, and Fe selectivity in aMDEA at 6.4 keV. The results obtained showed the XRF can be used for the routine analysis in the determination of Fe ions aMDEA samples.

Page 5 of 32 | Total Record : 314

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