Journal Description

KOVALEN: Jurnal Riset Kimia is a peer-reviewed journal of chemistry that published by the Chemistry Department, Tadulako University, Indonesia. This journal concern with publishing the original research articles, review articles, and the current issues related to chemistry. Publishing frequency 3 issues per year, in April, August, and December. KOVALEN has been established since 2015 with volume 1 no 1 (December 2015).


ISSN: 2477-5398 (electronic)


The Scope of this journal including:
1. Theoretical and environmental chemistry study
2. Material and biomaterial synthesis, including their application 
3. Isolation, purification, and modification of the natural product
4. Development and validation of analytical methods
5. Isolation and application of enzyme

Vol. 6 No. 1 (2020): Edisi April

Published: Apr 18, 2020

Efisiensi Mikroenkapsulasi Ekstrak Kulit Buah Naga Super Merah (Hylocereus costaricensis) Tersalut Maltodekstrin Berdasarkan Kecepatan Pengadukan

Microencapsulation Efficiency of Super Red Dragon Fruit (Hylocereus costaricensis) Peel Extract Coated with Maltodextrin Based on Stirring Speed

1-8 Jaya Hardi, Dian Citra, Syamsuddin, Dwi Juli Pusptasari
Read Statistic: 64

Pemisahan Logam Tanah Jarang dari Limbah (Tailing) Emas Poboya dengan Metode Pengendapan

Separation of Rare Earth Metals from Poboya Gold Waste (Tailings) by Deposition Method

9-17 Arianto, Husain Sosidi, Prismawiryanti, Dwi Juli Pusptasari
Read Statistic: 55

Isolasi dan Identifikasi Steroid dari Ekstrak N-Heksana Daun Afrika (Vernonia amygdalina Del.)

Isolation and Identification of Steroid from N-Hexane Extract of Vernonia amygdalina Del.

18-22 Evi Mashunah, Erwin, Saibun Sitorus
Read Statistic: 76

Analisis Kadar Serat dan Protein Total Sereal Berbasis Tepung Ampas Kelapa dan Ikan Cakalang (Katsuwonus pelamis)

Analysis of Fiber Content and Total Protein of Cereal Based on Coconut Pulp and Skipjack Tuna (Katsuwonus pelamis) Flour

23-33 Nanda Novita, Nurhaeni, Prismawiryanti, Abd. Rahman Razak
Read Statistic: 58

Aktivitas Antibakteri Ekstrak Metanol dari Kulit Batang Kelor (Moringa oleifera Lam.) Terhadap Bakteri Staphylococcus aureus dan Escherichia coli

Antibacterial Activity of Methanol Extracts from The Stem Bark of Moringa oleifera Lam. Against Staphylococcus aureus and Escherichia coli

34-38 Nurul Cholifah, Ahmad Ridhay, Pasjan Satrimafitrah, Ruslan, Hardi Ys
Read Statistic: 40

Penyerapan Ion Logam Merkuri Menggunakan Arang Aktif Limbah Kulit Pisang Kepok (Musa paradisiaca Formatypica)

The Adsorption of Mercury Metal Ion Using Kepok Banana’s Peel Waste (Musa paradisiaca Formatypica) Charcoal

39-44 Musafira, Dzulkifli, Fadrinah, Laila Qadrini
Read Statistic: 60

Fermentasi Kelapa Parut Bebas Protein dengan Aspergillus niger untuk Menghasilkan Lipase

Fermentation of Protein-Free Grated Coconut with Aspergillus niger to Produce of Lipase

45-52 Rifka Aulia, Syaiful Bahri, Meryany Ananda
Read Statistic: 50

Retensi Antosianin dari Ekstrak Daun Bayam Merah (Alternanthera amoena Voss) pada Pengolahan Mie Basah

Retention of Anthocyanin from Red Spinach Leaves Extract (Alternanthera amoena Voss) in Processing Wet Noodles

53-60 Betzy Eppang, Nurhaeni, Khairuddin, Ahmad Ridhay, Jusman
Read Statistic: 56

Skrining Fitokimia, Uji Toksisitas dan Uji Peredaman Radikal DPPH Ekstrak Daun Gelinggang (Cassia alata L)

Phytochemical Screening, Toxicity Test and DPPH Radical Scavenging Test of Cassia alata L (Gelinggang) Leaves Extract

61-66 Izkia Mawaddah, Erwin E, Chairul Saleh
Read Statistic: 41

Perbandingan Kadar Albumin Ikan Gabus (Channa striata) dari Proses Perebusan dan Pengukusan dengan Menggunakan Uji Biuret

Comparison of Cork Fish (Channa striata) Albumin Content from Boiling and Steaming Process by Using Biuret Test

67-73 Sulfitri Suardi, Syaiful Bahri, Khairuddin, Ni Ketut Sumarni, Erwin Abdul Rahim
Read Statistic: 212

Analisis Kualitatif dan Kuantitatif Metabolit Sekunder Ekstrak Etanol Buah Okra (Abelmoschus esculentus L. Moench) dengan Metode Spektrofotometri UV-Vis

Qualitative and Quantitative Analysis of Secondary Metabolites in Ethanol Extract of Okra (Abelmoschus esculentus L. Moench) Fruit with UV-Vis Spectrophotometry Method

74-80 Joni Tandi, Bella Melinda, Anita Purwantari, Agustinus Widodo
Read Statistic: 87

Isolasi dan Identifikasi Metabolit Sekunder dari Ekstrak Etil Asetat Batang Nangka (Artocarpus heterophyllus Lmk.) dan Aktivitasnya Sebagai Antibakteri

Isolation and Identification of Secondary Metabolite from Ethyl Acetate Extract of Jackfruit Stem (Artocarpus heterophyllus Lmk.) and Its Antibacterial Activity

Read Statistic: 66
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