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All Journal Molekul: Jurnal Ilmiah Kimia JMES: The International Journal of Mechanical Engineering and Sciences
Rumpoko Wicaksono
Jenderal Soedirman University
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology Mechanical Engineering

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Antioxidant Activity and Total Phenol Extract of Kecombrang Flower, Stem and Leaves with Different Types of Solutions Siti Nuryanti; Nurul Latifasari; Rifda Naufalin; Rumpoko Wicaksono; Erminawati Erminawati
Molekul Vol 16, No 2 (2021)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.908 KB) | DOI: 10.20884/1.jm.2021.16.2.631

Abstract

Kecombrang (Etlingera elatior) is one of the spices which is quite widespread in Indonesia and has many uses. Kecombrang extract has the potential as an antioxidant and natural antimicrobial to extend the shelf life of food products. Extraction was carried out by multilevel maceration method with different types of solvents. This study aims to determine the effect of extraction on the bioactive components of flowers, stems and leaves of kecombrang in different types of solvents and determine the antioxidant activity and total phenols of each type of kecombrang plant extract.The results showed that extraction with distilled water produced the highest total phenol, antioxidant activity and yield on kecombrang leaves. The total phenol extracts of n-hexane leaves, leaves of ethyl acetate, and leaves of kecombrang distilled water were 19.116, 10.276, and 45.008 (mg TAE g db -1) respectively. The antioxidant activity value of flowers, stems and leaves of distilled water solvent kecombrang are 69.754, 72.648, and 78.003 (%) respectively. The yield for flowers, stems and leaves with distilled water solvent is 15.9; 16.6 and 32.95 (%) respectively.
Simple Bond-Graph Model To Predict Dried Material Temperature Evolution in A Batch Type Rotary Dryer Sugeng Waluyo; Ardiansyah Ardiansyah; Nurul Latifasari; Condro Kartiko; Poppy Arsil; Rumpoko Wicaksono; Muhammad Syaiful Aliim; Rifda Naufalin
JMES: The International Journal of Mechanical Engineering and Sciences Vol 8 No 2 (2024)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v8i2.6282

Abstract

In this work, we model temperature evolution inside a batch type rotary dryer by using the bond-graph method. The evolution model proposed here is mainly developed to predict dried material temperature inside the dryer during drying process. We implement the model in the 20-SIM bond-graph simulator (Controllab Products, the Netherlands) which shows realistic behaviors of the dried material temperature evolution with different combustion scenarios and rotation speeds.
Co-Authors Ardiansyah -- -- Condro Kartiko Erminawati Erminawati Muhammad Syaiful Aliim Nurul Latifasari Nurul Latifasari Poppy Arsil Rifda Naufalin Siti Nuryanti sugeng waluyo