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Moondra Zubir
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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 179 Documents
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Combination of Sinabung Volcanic Ash and Humic Acid Against Characteristics of Humid Silica Fertilizers Veny Apriyani; Thomson A.S Girsang; Ribka Sirait; Lisnawaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.13998

Abstract

Volcanic ash from Mount Sinabung has a large silica (SiO2) content of 69,93% and contains minerals needed by soil and plants. This potential cannot be directly utilized due to the acidic nature of volcanic ash which can damage plants. To be used as fertilizer, the process can be accelerated by adding humic acid from chicken manure. So the purpose of this study is to manufacture humic silica fertilizer by combining volcanic ash with humic acid from chicken manure and and  the characteristics of humic silica fertilizer. In this study a method of extracting humic acid from chicken manure was used using sodium hydroxide (NaOH) 0,25 M solution and mixing volcanic ash with humic acid. The results of humic acid extract from chicken manure were then combined with volcanic ash from sinabung. Nutrients from the combination obtained at variation 60:40 with the highest organic C were 1.37%, N total 0.24%, Phosphate 20.64 ppm and Potassium 0.664 me / 100g with pH fertilizer 6 and crumb texture and free neutral which indicates the fertilizer is ready to use.
Production of Activated Carbon from Natural Sources for Water Purification Rizka Alfi Fadhilah Lubis; Hafni Indriati Nasution; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 2 (2020): July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i2.19531

Abstract

Activated carbon as one of the widely used adsorbent has many application in the environment for the water purification and removing pollutant. Activated carbon can produced from agricultural waste and has not been optimally used. In this paper, these natural sources from agricultural waste materials has been reviewed and the potential as activated carbon. Characteristics of activated carbon that can be used as a activated carbon depends on surface area and pore structure prepared through activation method. Activation method for carbon depends on the precursor and characteristic of activated carbon which are expected. Natural sources can be converted into activated carbon by chemical, physical, or physical-chemical activation. Therefore, this paper is aimed to providing information about methods of production activated carbon has been reported for purify water.
Electricity Production From Peat Water Uses Microbial Fuel Cells Technology Lisa Utami; Lazulva Lazulva; Yuni Fatisa
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.v2i1.12371

Abstract

This study aims to study how the potential of peat water as a source of electrical energy using Microbial Fuel Cell (MFC) technology. Observations were made on two chamber vessel reactors (anodes and cathodes) and connected to electrochemical cell circuits (voltaic cells) and voltage values were measured, current, power density generated from the circuit for 9 days.The results of the measurement of the maximum voltage value, the maximum current generated and the maximum power density (8th day) of the reactor are obtained as follows: 50.8 mV, 1 µA and 3.64 x 10-2 mW / m2
Analysis of Corrosion Rate With Addition of Pumps in Commercial Steel in Sea Water Media Rini Selly; Ricky Andi Syahputra; Moondra Zubir; Lisnawaty Simatupang; Erpida Ompusunggu; Jesicca Aprilyani; Nopita Sitompul
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 1 (2020): January 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i1.18339

Abstract

Corrosion or rusting is very common in metals is a decrease in the ability of a metal due to the environment or chemicals. Sea water is a corrosive environment for metals because it contains sodium chloride (NaCl), calcium sulfate (CaSO4), calcium carbonate (CaCO3), and dissolved oxygen (O2) which affect the corrosion process of the material. The presence of dissolved oxygen will cause the rate of corrosion in metals to increase with increasing oxygen content (O2), the solubility of oxygen in water is a function of pressure, temperature and chloride content. The process of corrosion is almost the same for all materials, especially in metals occurs slowly but surely, corrosion can cause a material to have a limited service life, where the material expected to be used for a long time turns out to have a shorter life span than the average usage life.
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.
The Effect of Sambung Nyawa Leaf Extract (Gynura Procumbens) on Albumin and Globulin of Rats (Rattus Novergicus) Serum Induced by E. Coli Bacteria Disa R Siregar; Pasar Maulin Silitonga
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23092

Abstract

The aim of this research was to study the effect of extract of the sambung nyawa (Gynura procumbens) leaf on albumin and globulin concentration of rats blood serum. The research method is experimental used Completely Randomized Design (CRD) that consists of 3 treatments and 5 replications. The treatment of this research was induced rats with E. coli then given 0.5 mL of sambung nyawa leaf extract with doses 0.0 mg/kgBW; 300 mg/kgBW; and 600 mg/kgBW. The data was analyzed using Analysis of Variance. The results showed that the giving extract of the sambung nyawa leaves gives effect on albumin and globulin concentration of rats blood serum. Giving sambung nyawa leaf extract at dose 0.00 mg/kgBW; 300 mg/kgBW; and 600 mg/kgBW to rats gave the average of albumin and globulin concentration in a row in each treatment is 486 g/dL; 2.632 g/dL; 4.23 g/dL and 5.82 g/dL; 6.03 g/dL; 4.16 g/dL.
Potential of Bio-briquette of Pineapple Crown Waste (Ananas comosus (L.) merr Kurnia Nur Addina; Lazulva Lazulva
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.v2i1.12370

Abstract

This study aims to determine the potential of pineapple crown waste to be used as natural fuel in the form of biobriquettes, The research method used in this study is an experimental method. The research carried out in several stages, namely collection of raw materials, dehydration of raw materials, carbonization, crushing and screening, mixing binder, molding and compressing, drying and briquettes quality determining. The research findings showed that the bio-briquette quality of pineapple crown was 5.2-2.2% based on water content test, kabout 200-150 minutes, heating a liter water wiyh 200 grams bio-briquette was 23-15 minutes. All results of bio-briquette quality test of pineapple crown passed the SNI 06-3730-1995.
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.
PHYTOCHEMICAL SCREENING OF SIJUKKOT EKSTRACT (Lactuca Indica L.) Jesica C.R. Panjaitan; Albinus Silalahi
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 2 (2020): July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i2.19527

Abstract

Have been carried out Phytochemical screening on Sijukkot  which determited as Lactuca indica L, the plant from Gibeon hill forrest area in the village of Parsaora Sibisa Ajibata, Toba Samosir, North Sumatera. Test carried out to determine the composition of secondary metabolites contained in these plants. It was started by extracting plant leaves using 96% ethanol solvent which was carried out by maceration method and concentrated using a rotary evaporator. The concentrated extract obtained was sponsored by phytochemical tests. Phytochemical test results on ethanol extracts from the leaves of the Sijukkot plant were obtained compositions namely Flavonoids, tannins, saponins, steroids and triterpenoids.
Reaction of Metals with Floor Cleaner Liquids Siti Rahmah; Elsima Nainggolan; Aura F Harahap; Cut S Riska; Deri S Sitepu; Anna C ASiregar; Aria Nanda; Debora P Simanjuntak
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 1 (2020): January 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i1.18311

Abstract

Metals react with acid to produce hydrogen gas. Some of floor cleaner liquids contain concentrated strong acid such as HCl. This study was conducted to react metals (Zn, Al, Fe, Cu) with floor cleaner liquids (WPC and Vixal) that contain 17% HCl to produce hydrogen gas. The most hydrogen gases were resulted from reaction between Al and both of floor cleaner liquids. They show the same trend Al lebih besar dari Cu lebih besar dari Zn lebih besar dari Fe for the volume of hydrogen gas produced . It was not appropriate with theory due to different of surface area of each metals used.

Page 4 of 18 | Total Record : 179

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