cover
Contact Name
Moondra Zubir
Contact Email
moondrazubir@unimed.ac.id
Phone
-
Journal Mail Official
ijcst.kimia.unimed@gmail.com
Editorial Address
Chemistry Department , State University of Medan Jl. Willem Iskandar Pasar V, Medan Estate Medan, Indonesia
Location
Kota medan,
Sumatera utara
INDONESIA
Indonesian Journal of Chemical Science and Technology
ISSN : 26221349     EISSN : 26224968     DOI : -
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)
Articles 99 Documents
Antibacterial Activity of Extract A. luteocarpa Tita Juwitaningsih; Destria Roza; Nora Susanti
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10182

Abstract

Meat is one of the food products that can easily be damaged, ( therefore it is necessary to preserve the process). therefore it needs to be done the process of preservation. In this study we studied the anti-bacterial activity of Alpinia luteocarpa extract against fresh meat rot bacteria, with paper disc diffusion method which is the standard recommended by the Clinical and Laboratory Standard Institute (CLSI,2012). The results of antibacterial activity test showed extract and fraction of A. luteocarpa able to inhibit bacterial growth B.cereus ATCC 21772   and. K.  pneumonia ATTC 13773. The bacteriostatic properties of the extract and fraction of A. luteocarpa against B. cereus ATCC 21772 and K. pneumonia ATTC 13773 were better than the positive control of chlorhexidine antibiotics (500 μg / mL) with inhibition zones 9-11 mm and 7-9 mm.
Synthesis of Vinegar Acid with Raja Uli Banana Peel (Musa paradiaca) by Adding Bagasse Water (Saccharum officinarum) Nurhasanah Nurhasanah; Zona Octarya
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10189

Abstract

The large amount of banana peel waste that increased soil acidity and caused environmental pollution. Bagasse water was used to provide additional sugar besides using Raja Uli banana peel due to the use of sugar is less economical This study is aimed at making vinegar acid with Raja Uli banana peel by adding bagasse water as the weak electrolyte solution on electrolyte and non-electrolyte practice . The optimization was done at the time used for fermentation by varying the time 1, 2, 3, and 4 days in each fermentation step. For testing vinegar acid, FeCl3 and H2SO4 as the qualitative test and alkalimetric titration were used as the quantitative test. The results showed that the third day was the optimum time to produce alcohol content with an average percentage of 2.5% and optimum acetic acid of 0.063 g / 100 mL.
Determining the Content of Nutrition and Organoleptic Test of Chips from Jackfruit Seed and Durian seed Sofiyanita Sofiyanita; Sri Nurhayati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10193

Abstract

The seed of jackfruit and seed of Durian are solid waste and rarely consumed by society. To increase economic value, the seed of jackfruit and the seed of Durian utilized and processed to be new food source and one of them was chips. The study was done in three stages, making the chips from the seed of jackfruit and the seed of Durian, analyzing the content of nutrient and organoleptic test. Analyzing the content of nutrient in the study was the level of protein, fat, water, dust, and carbohydrate and organoleptic test at color, taste, aroma, and texture from chips produced. Based on the results  of  study  that  the  level  of  protein,  fat,  water,  dust,  carbohydrate  and organoleptic  test  of  chips  from  the  seed  of  jackfruit  was  1.1151%,  0.9687%,9,3626%, 43118%, 84.2419%, and the chips from the seed of Durian the level of protein, fat, water, dust, and carbohydrate were 1.0786%, 2.7932%, 8,8043%, 3.4763 and 83.8477%. The chips from the seed of jackfruit and the seed of Durian had high level of carbohydrate. Thus the writer likes the chips form the seed of jackfruit and the seed of Durian. Based on Anova test toward color, taste, aroma, and texture it indicated that there is no the difference between the seed of jackfruit and the seed of Durian.
Characterization and Antioxidant Activity Edible Film of Durian (Durio zibethinus) Seed Starch with the Addition of Soursop (Annona muricata L.) Leaf Yuni Fatisa; Nadya Agustin
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10200

Abstract

Edible film is one of the environmentally friendly packaging materials and not harmful to health because it is made up of natural ingredients such as proteins, lipids, and polysaccharides. In addition to environmentally friendly, the development of edible film on food packaging can provide better product quality, as it is made from natural ingredients that contain various natural chemical compounds that are beneficial and can be directly consumed. In this study prepared edible film derived from durian seed starch with the addition of soursop leaf extract. This research aimed at knowing the physical and chemical characteristics, and antioxidant activity of  the edible film. The type of research used is experiment methods. The results showed that the best research findings of the edible film were on the addition of 2 g soursop leaf extract and the physical characteristic was transmission of water vapor that was 1.70 g/m2. 24 hours, the chemical characteristics were water content that was 17.33% and activity of antioxidant that was 1.5875 mg/mL.
Reduction of Heavy Metals Level in the Waste Water Using Phytoremediation Technique Azura Afrina; Lazulva Lazulva
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10594

Abstract

This research was carried out due to the existence of the waste heavy metals in the aquatic environment, which was very harmful to the sustainability of the environment. The purpose of this research was to find out the reduction percentage of copper metal (Cu) on the waste. This research using method phytoremediation test. The plants used were water hyacinth (Eichornia crassipes) and algae (Hydrilla verticilata). This study was conducted three times of the repetition in each variable. The measurement of Cu concentration using Atomic Absorption Spectroscopy (AAS) flame. The Results of this research was found that the efficiency of the average reduction in the concentration of Cu by water hyacinth was 82.8368% and the efficiency of the average reduction in the concentration of Cu by algae was 63.4042%.
Preparing of Cornstarch (Zea mays) Bioplastic Using ZnO Metal Nurwani Hayati; Lazulva Lazulva
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10595

Abstract

The manufacture of the bioplastic was done through the mixing process using an aquades solvent with a ratio massa 10 gram and 7 gram cornstarch, 150 mL aquades, 2 Ml glycerol and 0,5 gram ZnO. This study aim to find out physical characteristies (water vapour transmission rate, water content, thickness,biodegradation) and mechanical charateristics (tensile strength, elongasi, modulus young) are made of cornstrach (Zea mays) using ZnO metal. From the test results tensile strength was 2.744-4.018 Mpa, percentage of elongation was 28.4632.383%, modulus young’s was 8.9031026535-14.08617709Mpa, thickness was 0.16-0.29mm, water vapor transmission rate was 0.4329-1.52525g/m2.24 hours, water content was 13.5-14.5%, and biodegradation was 3.7798-7.0346% and 455-809 days.
Effect of pH on Biosorption Ion Cd(II) in Solutions using Lengkuas Merah (Alpinia Gralanga) Ahmad Faris Fauzi; Lisa Utami
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10596

Abstract

The biosorption characteristic of Cd(II) ions from aqueous solution using Lengkuas Merah (Alpinia Gralanga) were investigated as a function of pH. The maximum biosorption capacity of a Lengkuas Merah (Alpinia Gralanga) for Cd(II) was found to be 18,37 mg/L and 91,85% at optimum pH was 10. At pH 2 to 10 the biosorption of Cd ions tends to increase. The result showed that the lengkuas merah  can be evaluated as an alternative biosorbent to treatment waste water containing Cd(II). A Lengkuas Merah is low cost and has considerable high biosorption capacity.
Characterization of Chitosan-Bentonite and Water Hyacinth Plant as a Potential Adsorbent Moondra Zubir; Hafni Indriati Nasution; Mutya Fika Safitri; Agustina Mandasari
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.16318

Abstract

Water hyacinth (Eichhornia crassipes) has a very rapid growth in the waters so it can cause eutrophication. The silica content of 5.56% allows water hyacinth can be utilized as a natural adsorbent. Bentonit has an advantage as an adsorbent because it has an inter-layered structure that can be easily modified with chitosan, resulting in better performance as an eco-friendly adsorbent. This research aims to determine the characterization of chitosan-bentonite and water hyacinth as a adsorbent of Pb(II)removal. Characterization tests were performed using X-ray difraction (XRD) and Fourier Transform Infra Red (FTIR) spectrophotometry. From the results of quantitative XRD analysis can be seen that the adsorbent of chitosan-bentonit and water hyacinth have different adsorbent characteristic, but has the same crystal system that is triclinic crystal system.
Antimicrobial Activities of Bioactive Compounds from Jatropha curcas Zona Octarya; Fitri Refelita; Novia Rahim
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 1 (2019): January 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i1.12366

Abstract

Jatropha curcas L is widely planted in people's homes. Jatropha has many bioactive compounds, including flavonoids, saponins, tannins, and alkaloids. In this research, phytochemical tests and antimicrobial activities of sap and water extraction of Jatropha curcas L leaves on Candida albicans, Aspergillus, and Pseudomonas aeruginosa were carried out. The results of the phytochemical test of sap and water extraction of leaves showed positive results in the test of flavonoids, saponins, alkaloids and tannins. While steroid testing showed negative results. The antimicrobial capabilities of sap and water extraction of leaves to Aspergillus were 10.5 mm and 11 mm and to Pseudomonas Aeruginosa were 15 mm and 11 mm. Whereas the antimicrobial ability of sap and water extraction of leaf to Candida albicans was negative. In this case, it means that Pseudomonas aeruginosa is including microbes that are sensitive to antimicrobial origin of plants.
Analysis of Banana Leaves as Noise Reducing Media With Addition of Zalacca Plam Peel Irmadona Irmadona; Elwy Asrianto Marbun; Aisyah Nurul Ilmi Lubis; Putri Lynna A. Luthan
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 1 (2019): January 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i1.12367

Abstract

At present there are very many sound absorbers developed with modifications from various simple materials available. A comparative study and analysis of banana midribs as a sound dampening medium has been tested by several other researchers, but not with the addition of zalacca bark. This research was continued to find out whether salak skin would reduce the sound. In this study carried out by the method of making banana midrib fiber, salak skin carbonization, composite fabrication and specimen testing. The specimens used is 30x30 cm. This composite consists of polyester resin as a matrix, banana midrib fiber and salak skin as a pore enhancer with a ratio of 5: 1. The results of the data from this analysis are that the sound can be muted by a composite that has been tested with a specimen test of 6 dB; 8.3 dB; 16.8 dB; 16.9 dB; 14 dB.

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