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Moondra Zubir
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Chemistry Department , State University of Medan Jl. Willem Iskandar Pasar V, Medan Estate Medan, Indonesia
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INDONESIA
Indonesian Journal of Chemical Science and Technology
Published by Universitas Negeri Medan
ISSN : 26221349     EISSN : 26224968     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal ini mempublikasikan artikel di bidang Kimia yang meliputi penelitian dasar dan terapan. Bentuk Publikasi di Indonesian Journal of Chemical Science and Technology : * Artikel * Review (berdasarkan permintaan Dewan Redaksi) * Communication (berdasarkan permintaan Dewan Redaksi)
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 237 Documents
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Effect Of Biomass Dosage on Biosorption Malachite Green Using Immobilized Langsat Shell (Lansium Domesticum Corr) Niswatul Inayah; Desy Kurniawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43177

Abstract

Malachite green dye waste is one of the wastes that is genotoxic and carcinogenic to humans. Biosorption is an effective process for the removal and recovery of Malachite green dye waste from aqueous solutions. In this study, the biomass used was a langsat shell which had been immobilized with sodium silicate. The obtained biosorbents were characterized using Fourier Transform Infra-Red (FTIR). In this research, we determine the effect of biomass dosage on biosorption Malachite green using the column method. The results showed that the optimum conditions for absorption occurred at biomass dosage 2 gram . The maximum biosorption efficiency of 96,85%
Analysis of Total Flavonoid Content in the Extract of Bajakah Kalalawit Root (Uncaria gambir Roxb) Infunded Results Nurul Reza Alfani; Rizki Febrianti; Wilda Amananti
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43184

Abstract

Bajakah kalalawit is one of the plants that has been empirically used in traditional medicine. The roots of Bajakah kalalawit (Uncaria gambir Roxb) have phenol and antibacterial content and have a high enough content of flavonoid compounds so that they have pharmacological activity as an anticancer. This article examines the content of flavonoid compounds contained in the extract of Bajakah Kalalawi root and also examines the total levels of flavonoids contained in the roots of Bajakah Kalalawi. Bajakah kalalawit root extract was obtained by the infundation extraction method using a water solvent (1:10). Examination of the characteristics of the sample is carried out by macroscopic and microscopic identification. The qualitative test of flavonoids was carried out by color reaction tests in two treatments. Determination of flavonoid levels in the root extract of bajakah kalalawi was carried out by the UV-Vis spectrophotometry method. From the results of the study showed that the levels of flavonoids in the root extract of Bajakah Kalalawi in sample A were 33.2% and in sample B by 44.8%. The results showed that the roots of Bajakah Kalalawi were shown to contain flavonoid compounds.
Effectiveness Test of the Antibacterial Activity of Endophytic Fungi RS-2 from Sambiloto (Andrographis paniculata) on Red Rice Media Luqiyatur Rohmah; Suryelita Suryelita; Riga Riga; Mariam Ulfah
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43181

Abstract

A. paniculata (Sambiloto) is a plant capable of producing various secondary metabolites which use in the field of pharmacology, one of which is as a source of antibacterial compounds. This potential can be explored from endophytic fungi associated with A. paniculata. The purpose was to determine the effectiveness of the antibacterial activity of the endophytic fungi RS-2 from branches of A. paniculata using red rice as the media. The stages of the research included isolation of the fungi, cultivation, extraction, antibacterial test, and test of the phytochemical of the endophytic fungi on branches of A. paniculata. The effectiveness test of antibacterial activity against the extract of the RS-2 endophytic fungi showed that the endophytic fungi extract had the potential to inhibit the growth of the three tested bacteria at concentrations of 10%, 30%, and 50%. The ethyl acetate extract of the endophytic fungi RS-2 from A. paniculata has the potential as a source of antibacterial compounds using red rice media.
Effect of Contact Time on Biosorption of Pb(II) Metal Ions Using Biosorbent from Durian Peel (Durio zibethinus L) Esti Ramadhani; Desy Kurniawati; Fitri Amelia; Ananda Putra
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43174

Abstract

Lead metal (Pb2+) is a heavy metal that is dangerous and has high toxicity. Pb2+ metal comes from industrial waste such as electroplating, paint, and the textile industry so it can find air. An effective, efficient, and economical method to overcome air contact with the biosorption method. Pb2+ metal ion biosorption using durian peel (Durio zibethinus L) as biosorbent. The purpose of this study was to determine the optimal conditions for the absorption of Pb2+ metal ions using the batch method with variations in speed and stirring time. The results showed that the optimal condition for Pb2+ absorption occurred at a contact time of 60 minutes with an absorption capacity of 33.6163 mg/g.
A Review: Immunomodulator Effects of Plants Extract on Rats with Haematological Parameter include White Blood Count and Differential Leucocytes Count Rafika Hayu Pratiwi; Tita Juwitaningsih
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43185

Abstract

Plants extract as immunomodulatory is substance which can stimulates or suppresses the component of immune system including white blood count and differential leucocytes count. The modulation of immune system by various plants extract has become subject for scientific investigation currently worldwide. Some of these plants have been claimed to increase immune system by increasing the total white blood count and differential leucocytes count are Achyranthes aspera Linn, Cermai Leaves (Phyllanthus acidus (L.)) Skeels, Moringa oleivera and Poguntano herb (Picriafel-terraeLour).. Plants extract were recommended for us as immunomodulatory because there are several botanical products with potential therapeutic applications such as high efficacy, low cost and low toxicity.
Biodegradation Study of Polymer Composites Reinforced by Areca catechu fibers (Areca catechu L.) and Snake plant fibers (Sansevieria Trifasciata) Tasya Natalia Lumban Gaol; Nurfajriani Nurfajriani
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43180

Abstract

Natural fiber components are used for composite materials because they provide strength to the fibers. Composite materials commonly used are thermoset polymers, one of which is epoxy resin. Biodegradation aims to determine the rate of change in the mass of the specimen after 40 days of burial. The purpose of this study was to determine the effect of the volume fraction of the combination of areca catechu fibers and snake plant fibers on biodegradation properties. The method used in this research is the soil burial test, which is to determine the rate of polymer biodegradation in the soil. The best results in the biodegradation property test obtained the highest mass value of 30% variation obtained after burial for 40 days amounting to 13,417 grams, with the biodegradation test obtained a comparison before and after burial the mass value obtained did not experience a significant increase, this is because the composite material have no pores. or holes for the entry of microorganisms into the soil.
Effect of Flow Rate on Adsorption Cadmium Ion (II) Using Activated Carbon of Langsat Shell (Lansium Domesticum Corr) Farras Shafa Nabila; Desy Kurniawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43175

Abstract

Cadmium is one of the dangerous heavy metals contained in industrial wastewater whose presence needs to be addressed. Adsorption is one method that can be used to reduce the levels of heavy metal ions contained in wastewater. Langsat peel activated carbon is used as an adsorbent to adsorb cadmium metal because it is easy to obtain and its use is still minimal in the community. The langsat peel was made into activated carbon with HNO3 activator as a metal ion absorber Cd2+ using the column method. The activated carbon obtained has been tested for quality according to the Indonesian National Standard (SNI) No.06-3730-1995. In this study, we determined the effect of flow rate on metal cadmium absorption. The results showed that the activated carbon met the quality standards set by SNI and the optimum value of Cd2+ metal ion adsorption was at a flow rate of 1 ml/min.
Kinetics Degradation and Shelf Life of Curcumin from Turmeric (Curcuma domestica Val) with Ethanol Extract Coated by Maltodextrin at Room Temperature Storage Jaya Hardi; Ruslan Lina
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43186

Abstract

Curcumin extract from the turmeric plant is unstable to light, temperature and changes in pH, therefore it is necessary to be coated with biopolymers to have a longer shelf life. This study aims to determine the type of degradation kinetics of maltodextrin-coated curcumin and its shelf life at room temperature storage. Encapsulation was performed using an emulsion technique combined with freeze drying with the ratio of turmeric ethanol extract to maltodextrin of 7: 5 (w/w). The results showed that the efficiency of coating ethanol extract of turmeric with maltodextrin was 31.26%. Kinetics degradation of curcumin coated with maltodextrin follows zero-order reaction kinetics. Microcapsule of turmeric ethanol extract coated with maltodextrin has a shelf life at room temperature for 8.35 weeks.
Analysis of The Optical Properties of Ag Nanoparticles With The Assistance of Bioreductors of Saga Leaf Extract (Abrus pecatorius L.) Rahma Sofia Putri; Aldi Budi Riyanta; Wilda Amananti
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43179

Abstract

Nanotechnology has become an important and interesting field of physics, chemistry, biology and engineering in recent years. The rapidly growing nanotechnology today is nanoparticles. The characteristic characteristic of nanoparticles is that the particle size is very small in the range (1-100 nm). Silver nanoparticles have been synthesized using saga leaf extract (Abrus pecatorius L.) as a reducing agent. The formation of silver nanoparticles was carried out by adding sage leaf extract to the AgNO3 solution and homogenizing using a magnetic stirrer for 60 minutes. UV-Vis spectrophotometer was used to confirm the formation of silver nanoparticles. Test the inhibition of bacteria using the well method. The results showed that the wavelength values were in the range of 375-395nm.
Kinetics Degradation and Shelf Life of Curcumin from Turmeric (Curcuma domestica Val) with Ethanol Extract Coated by Maltodextrin at Room Temperature Storage Jaya Hardi; Ruslan Lina
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43448

Abstract

Curcumin extract from the turmeric plant is unstable to light, temperature, and changes in pH, therefore it is necessary to be coated with biopolymers to have a longer shelf life. This study aims to determine the type of degradation kinetics of maltodextrin-coated curcumin and its shelf life at room temperature storage. Encapsulation was performed using an emulsion technique combined with freeze drying with a ratio of turmeric ethanol extract to maltodextrin of 7: 5 (w/w). The results showed that the efficiency of coating the ethanol extract of turmeric with maltodextrin was 31.26%. Kinetics degradation of curcumin coated with maltodextrin follows zero-order reaction kinetics. The microcapsule of turmeric ethanol extract coated with maltodextrin has a shelf life at room temperature of 8.35 weeks.

Page 10 of 24 | Total Record : 237

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