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Kinetics of chlorophyll pigment degradation of pakcoy (Brassica rappa L.) juice during thermal process Wiyono, Andi Eko; Rusdianto, Andrew Setiawan; Ulya, Asyafa’atul; Setyawati, Putu Dewi Ratih
Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Vol 8, No 4 (2025)
Publisher : Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.afssaae.2025.008.04.4

Abstract

Pakcoy (Brassica rappa L.) is a horticultural commodity with great potential that requires further processing to preserve quality and extend their shelf life. One of the commonly used advanced processing techniques is the pasteurization method, which uses a thermal process. The thermal process is known to cause quality degradation in pakcoy juice, especially its chlorophyll content. This study is to determine chlorophyll pigment degradation kinetics in pakcoyjuice during the thermal process. The kinetics of chlorophyll degradation followed first-order reactions, with an activation energy of 38.24 kJ/mol. The ? value ranged from 114.943 to 384.615 minutes, the ? value was 60.61°C, and the reaction rate constant (?) increased with increasing temperature. The results of this study emphasized the importance of controlling the temperature and duration of the thermal process to maintain the quality of chlorophyll pigments in pakcoy juice.
Optimasi Formula Pewarna Alami Berbasis Buah Naga Merah (Hylocereus polyrhizus) Afkir Hasil Foam-Mat Drying Dengan Metode Simplex Lattice Design (SLD) Wiyono, Andi Eko; Amilia, Winda; Herlina, Herlina; Setiawan, Andrew; Aghata, Ola Riska Aprilia Intan; Savitri, Dewi Ayu
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 2 (2024): Juni
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i02.p08

Abstract

Inferior red dragon fruit has the potential as a source of natural dye. This research aimed to examined the quality of natural dye powder as a referenced for optimization. To optimized the formula for natural dye powder based on rejected dragon fruit, and to examined the physical and chemical quality of natural dye powder at the optimum formula. The varied ingredients in this research were ascorbic acid and tween 80. The upper and lower limits of use of both ingredients were 3% and 1% for ascorbic acid, as well as 1% and 0.5% for tween 80. The method used laboratory experimental method and quantitative analysis data. The experimental design used in this research was an experiment with the application of the simplex lattice design (SLD) method, so that several formulas were obtained based on the variation of two factors. Results of the observation data were inputted into the Design-Expert version 13 application so that a regression equation is obtained to determine the optimum formula. All data were presented in tables and graphs and analyzed descriptively. The results showed that F5 (ascorbic acid 3%: tween 80 0.5%) was the optimum formula because it had the highest desirability of 0.998 with a water content of 2.15%; total dissolved solids 9.66%; pH 3.766; L 53.71, a 14.20; b 7.39; dissolved time 61.33 seconds; Chroma 16,00; Hue 27.33ᵒ (red), and anthocyanin content 3,37 mg/mL. On exposure to the sun, outdoor and indoor experienced the highest degradation, namely 30.48% and 0.93%, respectively.
Optimasi formula serbuk kopi hijau dengan mixture design Wiyono, Andi Eko; Wibowo, Yuli; Pramesti, Vinka Oktavia
AGROINTEK Vol 20, No 1 (2026)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v20i1.25355

Abstract

Green coffee is coffee that does not go through a roasting process and has the main bioactive component as an antioxidant. Green coffee's liquid extract is generally used as a raw material or additional ingredient in food and non-food products. However, extracts in liquid form are easily damaged. Another effort that can be made to protect the antioxidant content of green coffee extract is to process it into green coffee powder using a foam mat drying technique. This research aims to obtain the optimum formula and determine the physical, chemical, and organoleptic characteristics of green coffee powder with variations of maltodextrin and tween 80 using the simplex lattice design method. The research design uses laboratory experimental methods with quantitative data analysis. Optimization parameters include water content tests, total dissolved solids, pH, dissolution rate, yield, and color. Supporting parameters include antioxidant activity tests, organoleptic, and ⁰hue value. The research results showed that the optimum formula for green coffee powder at a maltodextrin concentration of 0.97⁰ and tween 80 0.03% had a percentage resistance value to DPPH between 44.25-75.68% with an IC50 value of 65.15 ppm in the strong category; organoleptic parameters bright color, strong aroma, and neutral taste; The ⁰Hue value obtained is 90, including the color yellow (Y).
Co-Authors -, Giyarto Aghata, Ola Riska Aprilia Intan Agus Susanta Ajeng Afriska Lailatul Fajriyah Andrew Setiawan Andrew Setiawan Anisa Aprilia Anisa Aprilia Ardyan Dwi Massahid Aristanti, Fransiska Candra Asyafa'atul Ulya Atika Yulianti Bertung Suryadarma Bertung Suryadharma, Bertung Cahyan Ferdie Fernanda Desiyanti rukmasari Dewanti Eka Diah Permatasari Dewi Ayu Savitri Dhifa Ferzia Dian Purbasari Dian Purbasari Diana Ermawati Dini Kusuma Ningrum Dyah Ayu Savitri EKA RURIANI Eka Ruriani Ekky Audina Rusita Eko Priyantono Elok Sri Utami Elok Sri Utami Eva Yulia Windiari Fajriyah, Ajeng Afriska Lailatul Felly Halsa Fiana Fillyvio Nizhomia Fitri Rahma Sari Hana, Dania Mazidatul Hendy Firmanto Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Herlina Hifdzil Adila Ida Bagus Suryaningrat Iftitah Ariyanti Safitri Indira Maharani Hidayat Intan Hardiatama Intania Cahaya Rani Jani Januar Ketut Indraningrat Khoirul Umam Larasati, Misty Ayu Leemans, Joshep Yoshio Mahardika, Nidya Shara Maria Belgis Marsa Suci Nurmalasari Masahid, Ardiyan Dwi Mawaddah, Faireza Mega Desy Safitri Meiji Wanarni Putri Miftahul Choiron Miftahul Choiron MUHAMMAD IRFAN HILMI Muhammad Luthfi Nashiruddin Nadya Shara Mahardhika Nashiruddin, Muhammad Luthfi Nidya Shara Mahardika Nidya Shara Mahardika Nina Tauvika Nita Kuswardhani Noer Indah Maulida Putri Noer Novijanto Nuril Rohmawati Nur’aini Mardhi Utami Ola Riska Aprilia Intan Aghata Oryzatania Windaru Runteka Oryzatania Windaru Runteka Oryzatania Windaru Runteka Pamungkas, Ari Candra Juni Pradiptya Ayu Harsita Prajamukti, Randhiagus Pramesti, Vinka Oktavia Prameswari, Dinda Putri Prihani, Suwita Tri Putra, Sigit Arya Putri, Chantika Rahayu, Supratiana Retha Talia Shasabilah Retha Talia Shasabilah Retha Talia Shasabillah Rifqoh Anggarani Mulyana Rifqoh Anggarani Mulyana Riska Rian Fauziah Riski Mulya Setyawati Rosi Pratiwi Rusdianto, Andrew Setiawan Saputri, Luluk Sari, Vina Juanita Savitri, Dewi Ayu Septy Handayani Setyawati, Putu Dewi Ratih Shanya Widyan Firdaus Shinta Pramudita Shinta Syafrina Endah Hapsari Sigit Arya Putra Sih Yuwanti Siswoyo Soekarno Siti Aisah Sri Wahyuni Suwasono, Sony Tiara Dwi Kusuma Putri Tiwakana, Yolanda Maulani Tri Riwayati Sudarmono Triana Lindriati Triana Oktaviani Nurhardiningsih Ucik Nurul Hidayati Ucik Nurul Hidayati Ulya, Asyafa’atul Vindha Dhila Wulandari Vinka Oktavia Pramesti Viola Risti Agasi Winda Amilia Winda Amilia Winda Amilia Windiari, Eva Yulia Yolanda Maulani Tiwakana Yuli Wibowo Yusriyyah Vika Rahmadhani Zuhriyah, Anis K