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ALKIMIA : Jurnal Ilmu Kimia dan Terapan

alkimia
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Published by Universitas Islam Negeri Raden Fatah Palembang

ISSN : 25809873 EISSN : 25809881 DOI : -

Core Subject : Science, Social, Engineering,

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Social Sciences

ALKIMIA : Journals of chemistry and applied science with number of E-ISSN: 2580-9881 and P-ISSN: 2580-9873 is a journal of chemistry that publishes research results related to the findings in the field of organic chemistry, inorganic, physical, analytical, biochemical and other as a problem solving in the field of environment, energy, and food. ALKIMIA is published twice a year in February and August, by chemistry science and technology faculty of UIN Raden Fatah Palembang. The editors are happy to invite researchers to publish their research results at Journal ALKIMIA.

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Articles 5 Documents

Search results for , issue "Vol 6 No 1 (2022): ALKIMIA" : 5 Documents clear

Endophyte Extract From Nattle (Urtica dioica L.) Against Staphylococcus aureus and Escherichia coli Azim, Muhlisun; Novasari, Novasari; Hariadi, Puspawan; Febriani, Yuyun; Yuliana, Tri Puspita
ALKIMIA Vol 6 No 1 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Endophytes are microorganisms that colonize the plant host tissue. Endophytic colonies are able to produce secondary metabolites in accordance with their host plants, endophytes have been found in every plant species studied to date and are recognized as a source of new natural compounds that have the potential to be exploited in medicine. This study aims to isolate and obtain endophytic fungi and to test secondary metabolites that have the potential as antibacterial against Staphylococcus aureus and Escherichia coli. Plant samples were taken around the village of Mamben, Wanasaba. The research method used is experimental laboratory. This research was conducted by isolating and identifying endophytic fungi from nettle stems. Obtained a type of endophytic fungal strain using Potato Dextrose Agar (PDA) media. The production of secondary metabolites of endophytic fungi was obtained by fermentation method using brown rice for a month then macerated for 3 days using methanol solvent and tested for secondary metabolites and antibacterial activity. The endophytic fungal extract of nettle stem contains alkaloids and flavonoids and is able to inhibit the growth of Staphylococcus aureus bacteria with the highest concentration of 60% with an inhibition zone of 18 mm. whereas, the extract of nettle stem endophytic fungus on Escherichia coli has not an inhibition zone.

Molecular Weight and Functional Group Analysis of Low Molecular Weight of Liquid Cyclic Natural Rubber Widiarti, Leni; Sajaratuddur, Sajaratuddur; Wirjosentono, Basuki; Eddyanto, Eddyanto
ALKIMIA Vol 6 No 1 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

The research about molecular weight and functional group analysis of low molecular weight liquid cyclic natural rubber has been done. The aim of this research is to achievement the quality of low molecular weight of liquid cyclic natural rubber. This research has been made in several steps such as preparation of the sample of rubber, the process of molecular degradation of cyclic rubber, and characterization of LCNR by using FTIR, GPC and viscosity test. Degradation is done with the help of the phenylhydrazine reagent with oxygen gas atmosphere with a flow rate of 2 LMin-1 for 24 hours. Molecular weight analysis by GPC had result the LCNR sample had a Mw is 60,556, a Mn is 6,661, and a PDI is 11,08613. The intrinsic viscosity can be used by relating it to the molecular weight by the Mark Houwink – Sakurada (MHS) equation and get the result 63.533 for LCNR molecular weight. The C-H stretching and bending region are two of the most difficult regions to interpret in infrared spectra. The ranges between 3300 to 2750 cm-1 is the C-H stretching region, is the more practical of the two regions. The frequency with which C-H bonds are obstructed is largely determined by the type of hybridization attributed to the bond. The stronger the vibrational force constant, the higher the vibration frequency.

Platinum and Cobalt hydroxide – modified Platinum Electrode as Sensor for Electrochemical Oxidation of Amoxicillin Herlina, Herlina; Zulfikar, Muhammad Ali; Sirumapea, Lasmaryna; Buchari, Buchari
ALKIMIA Vol 6 No 1 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Antibiotics have recently gained in popularity due to their usage in medical treatment and the process of removing them from the environment. Amoxicillin is one of the antibiotics that constitutes the study's subject. On a Pt disc electrode and a cobalt hydroxide modified-Pt electrode, the scan rate and pH in the electrochemical oxidation of amoxicillin were investigated. The voltammetry measurement's current peak revealed that changing the electrode surface could increase the electrochemical response and sensitivity of the working electrodes. The Pt/Co(OH)2 modification working electrode had a high sensitivity in the electro-oxidation determination of amoxicillin, with a linear range of the sensor of 20 to 80 M and a limit of detection of 7.15 M for the Pt disc electrode and 3.64 M for the cobalt hydroxide modified Pt electrode. The findings of determination in real samples with electro-oxidation using a modified electrode were in good agreement with a confidence level of 95 percent, according to the comparing method with HPLC.

Skrining Bakteri Lipolitik Hasil Isolasi dari Tanah Terkontaminasi Minyak Khurniyati, Maylina Ilhami; Sumarsih, Sri; Chasanah, Uswatun
ALKIMIA Vol 6 No 1 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Lipase (triasilglycerol acylhydrolase, E.C, 3.1.1.3) is an enzyme can hydrolyze long chains of triglycerides[1]. Lipase is a water-soluble enzyme and naturally lipase catalyze the hydrolysis of ester bonds in water insoluble lipid substrate and long-chain acylglycerol synthesis, diacylglycerol, monoacylglycerol, and glycerol[2]. Hydrolase enzyme lipase can be used potentialy produced fatty acid which precursors in the chemical industry[3]. The research aims to study the lipolytic activity of bacteria isolated from soil contaminated with oil. Screening of lipolytic bacteria was performed in Rhodamin-B agar plate containing olive oil. The lipolytic activity was determined by spectrofotometry method toward p-nitrofenil palmitat as a substrate. The result this research showed that there are 15 of 150 isolates bacteria from soil contaminated with oil was confirmed by observing the zone of hydrolysis formed around the growth of colony on Rhodamin B agar plate containing olive oil. One of the lipolytic bacteria identified as higher activity was produced lipase with activity of 7,41 U/ml

Magnetic-Hydrochar from Galam Bark Waste (Malaleuca cajuputi) as Sasirangan Waste Adsorbent Habibah, Hanna; Ridwan, Risaldi; Safitri, Desmalina; Sunardi, Sunardi
ALKIMIA Vol 6 No 1 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Galam wood (Malaleuca cajuputi) is one of the woody plants that is able to grow well in the peat swamp environment of the South Kalimantan wetlands. Research on the synthesis and characterization of magnetic-hydrochar from galam bark waste for the treatment of sasirangan liquid waste has been carried out. This study aims to determine the characteristics of hydrochar and magnetic-hydrochar against the adsorption ability of sasirangan liquid waste. The results showed that the modification of galam bark into hydrochar and magnetic-hydrochar produced different characteristics based on the analysis of functional groups of infrared spectra. The surface morphology of hydrochar and magnetic-hydrochar also showed the significant differences based on scanning electron microscope (SEM) analysis. The resulting magnetic-hydrochar showed a higher adsorption ability to sasirangan waste than the hydrochar of galam bark and galam bark without modification.

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Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
SITI RODIAH

Contact Email
siti.rodiah_uin@radenfatah.ac.id

Phone
-

Journal Mail Official
jurnal.alkimia@radenfatah.ac.id

Editorial Address
-

Location
Kota palembang,

Sumatera selatan

INDONESIA