Indonesia Chimica Acta
Published by Universitas Hasanuddin
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Articles
37
Articles
THE USE OF MCM-48-nCaO AS CATALYST IN ESTERIFICATION REACTION OF NYAMPLUNG SEED OIL (Calophyllum inophyllum L.)

Kolo, La, Firdaus, Firdaus, Taba, Paulina

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 8 No 2 - December 2015
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

A study on the use of MCM-48-nCaO as a catalyst in the esterification reaction of nyamplung seed oil (Calophyllum inophyllum L.) has been carried out. The characterization results of XRF, XRD and FTIR showed the success in the synthesis of heterogeneous catalysts, MCM-48- nCaO, using a grinding-impregnation method. Through esterification reaction using the catalysts, FFA content in the seed oil of nyamplung reduced from 28 to 1.7%.Keywords: nyamplung seed oil, MCM-48-nCaO, esterification.

PRODUKSI SENYAWA BAKTERIOSIN SECARA FERMENTASI MENGGUNAKAN ISOLAT BAL Enterococcus faecium DU55 DARI DANGKE

Razak, Abd. Rahman, patong, Abd. Rauf, Harlim, Tjodi, Djide, M. Natsir, Haslia, Haslia, Mahdalia, Mahdalia

Indonesia Chimica Acta Volume 2 No 2 - December 2009
Publisher : Indonesia Chimica Acta

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Abstract

Dangke is one of traditional food from Enrekang Province Sulawesi Selatan which is made from buffalo milk and enzimatically processed using papain from papaya’s gland secretion. Research on this local product as source of lactic acid bacteria (LAB) has been done. Counted 30 LAB was successfully isolated and 3 of them were potentially to be able to yield antimicrobial compound. Enterococcus faecium DU55 is one of LAB isolate available to be applied for producing bacteriocin compound through fermentation. Optimum condition of fermentation was specified by determining the highest antimicrobial activity generated by filtrate of fermentation result. Antimicrobial activity examination was carried out through diffusion agar method by measuring inhibition zone growth of pathogen bacterium Salmonella typhimurium FNCC 0050. Research results indicate that maximum bacteriocin compound production by BAL isolate E. faecium DU55 was obtained at condition of optimum fermentation at 30 °C during 42 hour using M1 medium with the same composition to medium MRS (Man Rogosa and Sharpe).Keyword: dangke, LAB isolate, bacteriocin, antimicrobial activity

PRODUKSI SENYAWA BAKTERIOSIN SECARA FERMENTASI MENGGUNAKAN ISOLAT BAL Enterococcus faecium DU55 DARI DANGKE

Razak, Abd. Rahman, patong, Abd. Rauf, Harlim, Tjodi, Djide, M. Natsir, Haslia, Haslia, Mahdalia, Mahdalia

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 2 No 2 - December 2009
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

Dangke is one of traditional food from Enrekang Province Sulawesi Selatan which is made from buffalo milk and enzimatically processed using papain from papaya’s gland secretion. Research on this local product as source of lactic acid bacteria (LAB) has been done. Counted 30 LAB was successfully isolated and 3 of them were potentially to be able to yield antimicrobial compound. Enterococcus faecium DU55 is one of LAB isolate available to be applied for producing bacteriocin compound through fermentation. Optimum condition of fermentation was specified by determining the highest antimicrobial activity generated by filtrate of fermentation result. Antimicrobial activity examination was carried out through diffusion agar method by measuring inhibition zone growth of pathogen bacterium Salmonella typhimurium FNCC 0050. Research results indicate that maximum bacteriocin compound production by BAL isolate E. faecium DU55 was obtained at condition of optimum fermentation at 30 °C during 42 hour using M1 medium with the same composition to medium MRS (Man Rogosa and Sharpe).Keyword: dangke, LAB isolate, bacteriocin, antimicrobial activity

Isolasi, Karakterisasi, dan Uji Bioaktivitas Metabolit Sekunder dari Hydroid Aglaophenia cupressina Lamoureoux Sebagai Bahan Dasar Antimikroba

Johannes, Eva, Usman, Hanapi, Ahmad, Ahyar

Indonesia Chimica Acta Volume 2 No 1 - June 2009
Publisher : Indonesia Chimica Acta

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Abstract

Isolation, structure elucidation, activity test against Salmonella thypi, Staphylococcus aureus of secondary metabolite from hydroid Aglaophenia cupressina Lamoureoux, were conducted. This study was aimed to identify and isolate the compound with antibacterial properties of hydroid Aglaophenia crupessina Lamoureoux. This study used stepwise method with the following sequences: extraction, isolation, purification, structure elucidation, and bioactivity test. Study results indicated three compounds found: (1)carboxylate acid compound: hexadecanoic acid and has antibacterial properties; (2) alkaloidcompound which was considered as a new compound: aglaounhas and has antimicrobialproperties; (3) steroid compound: β-sitosterol with no antimicrobial properties.Keywords: Isolation, characterization, secondary metabolite, Aglaophenia cupressina, Antibacterial.

Isolasi, Karakterisasi, dan Uji Bioaktivitas Metabolit Sekunder dari Hydroid Aglaophenia cupressina Lamoureoux Sebagai Bahan Dasar Antimikroba

Johannes, Eva, Usman, Hanapi, Ahmad, Ahyar

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 2 No 1 - June 2009
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

Isolation, structure elucidation, activity test against Salmonella thypi, Staphylococcus aureus of secondary metabolite from hydroid Aglaophenia cupressina Lamoureoux, were conducted. This study was aimed to identify and isolate the compound with antibacterial properties of hydroid Aglaophenia crupessina Lamoureoux. This study used stepwise method with the following sequences: extraction, isolation, purification, structure elucidation, and bioactivity test. Study results indicated three compounds found: (1)carboxylate acid compound: hexadecanoic acid and has antibacterial properties; (2) alkaloidcompound which was considered as a new compound: aglaounhas and has antimicrobialproperties; (3) steroid compound: β-sitosterol with no antimicrobial properties.Keywords: Isolation, characterization, secondary metabolite, Aglaophenia cupressina, Antibacterial.

Utilization of Clay as Adsorbent Laboratory Waste

M.Bijang, Catherina, Telussa, Ivonne

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 1 No 1 - December 2008
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

Treatment for laboratorium waste need to carry out for prevented environment pollution if accumulation occured in the world. Natural resources available in maluku like clay can used to treat heavy metal Pb and Cu wastes. This adsorben were clay from Ouw village in Saparua,Maluku. The clay were brown and black. Each clay were activated with soaked in sulfuric acid for 5 and 10 hours. The result showed that the black clay with activated for 5 hours in sulfuric acid had the best adsorb.This clay more effective for adsorp Pb2+ ion compare with Cu2+ ion.Keywords : clay, adsorben, heavy metal.

Studi Bioaktivitas Antibakteri Fraksi Protein Hidroid Aglaophenia cupressina Dari Pulau Lae-Lae Sulawesi Selatan

Umriani, Nur, Rauf Patong, Abdul, Ahmad, Ahyar

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 1 No 1 - December 2008
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

This research aimed to know the activity of bioactive protein, extracted from Hydroid (Aglaophenia cuppressina), in inhibiting the growth of pathogenic bacteria. Samples were taken from Lae-lae Island in South Sulawesi. Methods used were the Lowry method for determining the protein concentration and the agar diffusion method  for testing the antibacterial activity. Extraction of Hydroid was conducted by making use of buffer solution, (0,1 M Tris-HCl of pH 8.3, 2 M NaCl, 0.01 M CaCl, 1% β-mercaptoethanol, and 0.5% Triton X-100). Protein was purified by ammonium sulfate precipitation at 20%, 40%, 60% and 80% saturation followed by dialysis. Results showed that the protein fraction of Aglaophenia cuppressina before dialysis with 40 % ammonium sulfate saturation had the highest antibacterial activity to Staphylococcus aureus and Escherichia coli with inhibition zones of  14.58 and 18.05 mm, respectively. In addition, the protein fraction of Aglaophenia cuppressina after dialysis with 40 % saturation also had the highest antibacterial activity to the tested bacteria with inhibition zones of  13.95 and 11.78 mm, respectively. The minimum inhibition concentration to the tested bacteria and Escherichia coli at 40% ammonium sulfate (0,1 M Tris-HCl of pH 8.3, 2 M NaCl, 0.01 M CaCl 2 saturation was 6000 µg/mL with inhibition zones of 9.78 and 8.73 mm, respectively. Based on the bioactivity test of the Hydroid protein fraction using the agar diffusion method, it can be concluded that the activity characteristic of the fraction is bacteriostatic.Key words: Bioactivity, hydroid, bioactive protein, antibacterial, inhibition zone.

Karakterisasi Sifat Fisikokimia Komposit Besi Oksida-Montmorilonit Hasil Interkalasi Silikat Lempung Montmorilonit

Jolanda Sekewael, Serly

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 1 No 1 - December 2008
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

The preparation of iron oxide-montmorillonite composite has been done by intercalation of iron oxide into the silicates interlayer of montmorillonite. Montmorillonite and iron oxide-montmorillonite composite were characterized to observe some physical and chemical properties. The observed properties were basal spacing d001, determined by X-Rays Difractometer (XRD); surface morphology, analyzed by SEM/EDAX; specific surface area, distribution of pore radius and total pore volume, analyzed by Gas Sorption Analyzer; functional groups, analyzed by FTIR Spectrophotometer; and iron content, determined by X-Ray Fluorescent Analyzer (XRF). The characterization of montmorillonite and iron oxide-montmorillonite composite showed that the basal spacing d001, increased from 14.11 Å in montmorillonite to 16.85 Å in iron oxide-montmorillonite. Surface morphology of montmorillonite showed the laminated structure, while that of iron oxide-montmorillonite indicated a delaminated structure with the external oxides layered. Specific surface area increased from 69.71 m2/g to 126. 49 m2/g; total pore volume also increased from 50.70 x10-3 mL/g to 107.89 x10-3 mL/g. Generally, spectrum adsorption of montmorillonite and iron oxide-montmorillonite composite not different so far, stretching vibration O-H with Fe3+ does not exist on iron oxide-montmorillonite composite. The iron content also increased from 4.57 %(w/w) to 23.61 %(w/w).Keywords : montmorillonite clay, intercalation, iron oxide-montmorillonit composite.

UTILIZATION OF ETHYL ACETATE FRACTION KETAPANG LEAF (Terminalia catappa) AS BIOREDUCTOR IN SYNTHESIS GOLD NANOPARTICLES AND ANALYSIS ANTIBACTERIAL PROPERTIES

Hafid, Sarwina, Zakir, Muhammad, Dali, Seniwati

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 8 No 2 - December 2015
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

Gold nanoparticles was synthesized by bioreduction method using ethyl acetate fraction of ketapang leaf (Terminalia catappa). Nanoparticles formed were characterized using spectrophotometer UV-Vis, Fourier Transform Infra Red (FTIR) and X-Ray Diffraction (XRD). In the   analysis   of   spectrophotometer   UV-Vis   gold   nanoparticles   with   a   precursor   solution concentration of 0.5 mM and 1 mM each has an absorption between 533.5-540 nm and 539-587 nm. Analysis of functional groups of gold nanoparticles was analyzed by Fourier Transform Infra Red (FTIR). Crystal system of gold nanoparticles is cubic with nanoparticles size of 17.13 nm. The evaluation of test antibacterial activity was performed using several bacteria test such as Staphylococcus aureus, Escherichia coli, and Bacillus subtilis. Gold nanoparticles can not inhibit the activity of a test bacterium Staphylococcus aureus, Escherichia coli, and Bacillus subtilis so that differences in the concentration of gold nanoparticles did not affect the inhibition of bacteria.Keyword:  antibacterial, biosynthesis, characterization of nanoparticles, gold  nanoparticles, Terminalia catappa.

ELECTRODEPOSITION OF Cu ON THE SURFACE OF SILICA FREE RICE HUSK ACTIVATED CARBON WITH ULTRASONIC IRRADIATION

Andhika, Ryan, Zakir, Muhammad, Maming, Maming

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 8 No 2 - December 2015
Publisher : Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta)

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Abstract

Electrodeposition of Cu on the surface of silica free rice husk activated carbon with ultrasonic irradiation aimed to increase the value of specific capacitance was carried out. Silica free rice husk activated carbon was synthesized using H3PO4  activator and extraction of silica using KOH. The surface area of rice husk carbon was obtained before and after the extraction of silica and after activation were 57.2833 m2/g, 180.5378 m2/g and 184.6074 m2/g, respectively. XRF analysis showed that Cu depositioned on the surface of silica free rice husk activated carbon and based of CV measurements showed that electrodeposition of Cu with ultrasonic irradiation can increased the value of specific capacitance. Specific capacitance of silica free rice husk activated carbon before and after electrodeposition of Cu with ultrasonic irradiation were 657.75 nF/g and 721.08 nF/g, respectively.Key words: Cu, electrodeposition, specific capacitance, activated carbon, ultrasonic.