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All Journal International Journal of Advances in Applied Sciences Jurnal Pangan dan Gizi Jurnal AGROTEKNOLOGI Animal Agricultural Journal Jurnal Ilmu dan Teknologi Hasil Ternak WARTAZOA Indonesian Bulletin of Animal and Veterinary Sciences Journal of the Indonesian Tropical Animal Agriculture Jurnal Pangan dan Agroindustri Warta IHP (Warta Industri Hasil Pertanian) Animal Production : Indonesian Journal of Animal Production Caraka Tani: Journal of Sustainable Agriculture Jurnal Aplikasi Teknologi Pangan Jurnal Aplikasi Teknologi Pangan Journal of Applied Food Technology Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi FOCUS: Journal of Social Studies Jurnal Teknologi Pangan Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Jurnal Agripet
Nurwantoro .
Departemen Pertanian, Fakultas Peternakan Dan Pertanian, Universitas Diponegoro
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Journal : Journal of Applied Food Technology

 1 
Effect of Different Kefir Grain Starter Concentration on Yield, pH, CO2 Content, and Organoleptic Properties of Buffalo Milk Kefir Lorentia Lydia Margareth; Nurwantoro Nurwantoro; Heni Rizqiati
Journal of Applied Food Technology Vol 7, No 1 (2020)
Publisher : Dept. Food Technology, Faculty of Animal and Agricultural Sciences, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (192.575 KB) | DOI: 10.17728/jaft.6513

Abstract

This research was investigated the effect of different kefir grain starter concentration on yield, pH, carbon dioxide (CO2) content, and organoleptic properties of buffalo milk kefir, and to investigated the ideal kefir grain concentration for good quality of kefir. Complete randomized design used in this research with 4 treatments and 5 replications in concentration 2.5, 5, 7.5, and 10% g/v kefir grain. Buffalo milk, kefir grain, Na2CO3 solution, 1% PP solution, pH meter, burette, and analytical balance were used in this research. The yield and pH of kefir was measured. Carbon dioxide (CO2)  content was measured by Na2CO3 titration, while the organoleptic properties that included level of sourness, sour aroma, texture, and overall acceptance were done by 25 panelists. The results indicated that different kefir grain starter concentration significantly affected to the yield, pH, CO2 content, and organoleptic properties (p<0.05). The most optimal kefir grain concentration was 5% proved by yield 81.81%, pH value 4.20, CO2 content 0.43%, and proper organoleptic properties which were low level of sourness, acceptable aroma of kefir and texture. As conclusion, the concentration of grain relied on the kefir properties that may achieve in the optimum quality of kefir.
The Effect of Different Type Drying Methods on Chemical Characteristics and Microbiology of Goat Milk Powder Kefir Nurwantoro Nurwantoro; Siti Susanti; Heni Rizqiati
Journal of Applied Food Technology Vol 7, No 1 (2020)
Publisher : Dept. Food Technology, Faculty of Animal and Agricultural Sciences, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.313 KB) | DOI: 10.17728/jaft.6699

Abstract

The research aims to test and compare the chemical characteristics and total Lactic Acid Bacteria or LAB of goat milk powder kefir that was produced from cabinet drying, freeze drying and spray drying. Kefir was made from goat milk since it was found as a good digestibility, no β-lactoglobulin, and high protein. Data analysis was performed with the test analysis of variance with a significance level of 5% followed by Duncan testing if significant result was detected. Analysis of total acid was conducted using titration. Analysis of proteins was conducted using Kjeldahl method. Water content analysis was performed using oven and ash content was analyzed using furnace. Analysis of fat content was conducted using Soxhlet method. Analysis of total LAB and total yeast were done using Total Plate Count (TPC). As results, drying method significantly affected (p<0.05) water content, ash content, and total LAB but there was no significant effect (p<0.05) on the total acid, protein content, fat content, and total yeast. As conclusion, the best treatment of drying method in making goat milk kefir powder was spray drying
Determination of The Optimum pH and Enzyme Ratio for Starch Hydrolysis Test and Characterization of Steamed, Baked, and Fried Wheat Doughs Abduh, Setya Budi Muhammad; Bintoro, V. Priyo; Nurwantoro, Nurwantoro; Yunianto, Vitus Dwi; Pramono, Yoyok Budi
Journal of Applied Food Technology Vol 10, No 1 (2023)
Publisher : Dept. Food Technology, Faculty of Animal and Agricultural Sciences, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17728/jaft.18727

Abstract

Digestibility is the most important nutritional functionality of starchy foods. Unfortunately, in Indonesia, this functionality has not been extensively studied due to the relatively challenging methods involving enzymes. This research aims to determine the optimal pH and enzyme ratio of α-amylase (AA) and glucoamylase (GA) for starch hydrolysis tests and apply them to characterize steamed, baked, and fried wheat doughs. For optimization, hydrolysis was carried out at 37 °C with an enzyme-to-substrate ratio (E/S) of 100 mL/g for 120 min. Samples of wheat dough obtained from three major dough producers in Banyumanik, Semarang, Indonesia was then tested for starch hydrolysis, texture, chemical analyses, sensory, and hedonic test. The collected data were analysed using principal component analysis (PCA). Under the determined conditions, the optimal pH and AA/GA ratio were found to be 6.6 and 0.5. Regarding quality of processed doughs, the steamed dough exhibited a cohesive texture, a soft sensory profile with a pleasant aroma, sweet taste, and was most preferred by the panellists. The baked dough was hard in texture, high in ash content, and brown in colour. The fried dough poses high starch hydrolysis, chewy texture, adhesion, solid particles, protein content, and relatively high lipid. The sensory evaluation indicated that the fried dough poses an oily, rancid, foreign aroma, and bitter and salty taste. It can be concluded that at a temperature of 37 °C, an enzyme-to-substrate ratio of 100 mL/g, and a reaction time of 120 min, the optimal starch hydrolysis of processed wheat dough can be achieved at a pH of 6.6 and an AA/GA ratio of 0.5. Furthermore, steaming resulted in a unique property of dough compared to the baked and fried, while the latter two yielded products with similar properties.
The Effect of Fermentation Time on the Physicochemical and Microbiological Qualities of Buffalo Colostrum Kefir Rizqiati, Heni; Nurwantoro, Nurwantoro; Prayitno, Edi; Muttaqin, Izza Wildani; Pangestu, Ridho
Journal of Applied Food Technology Vol 10, No 2 (2023)
Publisher : Dept. Food Technology, Faculty of Animal and Agricultural Sciences, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17728/jaft.20732

Abstract

This research aims to determine the best fermentation time to produce optimal buffalo colostrum kefir. Different fermentation times at 12, 24, 36, and 48 hours were used to measure the physicochemical and microbiological characteristics of buffalo colostrum kefir. To produce buffalo colostrum kefir, fermentation process at room temperature (27˚C±1) was used. Viscosity was measured using Ostwald viscometer and Total Dissolved Solid (TDS) was measured digital refractometer. Titratable acidity was analyzed using titration method and pH value was measured using pH meter. Protein content was analyzed using Kjeldahl method and fat content was analyzed using Soxhlet method. The result shows no significant differences (P>0.05) in viscosity which results in a value of 0.92±0.09 to 0.80±0.04 cP. Meanwhile, it shows significant differences (P<0.05) on TDS (24.02±0.80 to 13.30±0.76 ºBrix), titrable acid (1.96±0.10 to 2.53±0.04%), pH value (3.95±0.03 to 3.37±0.04), protein content (14.41±0.94 to 10.57±0.68%), fat content (20.33±0.88 to 6.89±0.90%), total LAB (2.85x106 to 9.57x106 CFU/ml), total yeast (2.16x105 to 7.76x105 CFU/ml), and total microbes (5.15x106 to 5.21x106 CFU/ml). The best treatment was 36 hours of fermentation with 20% grain concentration (w/v) because it produced the highest total Lactic Acid Bacteria (LAB), total yeast, and total microbes so it is potential to be a probiotic drink. 
The Effect of Butterfly Pea Flower (Clitoria ternatea) Extract Addition on Total Dissolved Solids, Yeast Count, Total Acidity, and Organoleptic Properties of Water Kefir Rizqiati, Heni; Nurwantoro, Nurwantoro; Abdullah, Sabina Fairuz Jinan
Journal of Applied Food Technology Vol 12, No 1 (2025)
Publisher : Dept. Food Technology, Faculty of Animal and Agricultural Sciences, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17728/jaft.27144

Abstract

This study aims to determine the effect of varying concentrations of butterfly pea flower extract (Clitoria ternatea) on kefir water in terms of total dissolved solids (TDS), total acidity, yeast count, and organoleptic properties. The materials used were dried butterfly pea flowers dissolved in mineral water (extract) and ingredients for producing kefir water. The experiment was conducted using a Completely Randomized Design (CRD) with extract concentrations of 0%, 0.5%, 1.0%, and 1.5% (v/v), each repeated five times. Data were analyzed using Analysis of Variance (ANOVA) and followed by Duncan's Multiple Range Test (DMRT) for the parameters of total dissolved solids, acidity, and yeast count. Organoleptic tests were analyzed using the non-parametric Kruskal-Wallis test, and if significant differences were found, they were followed by the Mann-Whitney test. The results of the study showed that the addition of butterfly pea flower extract at different concentration variations significantly affected (p<0.05) total dissolved solids, total acidity, and total yeast, with average values of total dissolved solids ranging from 10.90 to 10.40°Brix, total acidity from 0.05 to 0.21%, and total yeast of 1.60×10⁶ CFU/ml to 1.30×10⁶ CFU/ml. However, it did not affect taste, aroma, and texture, although color showed significant differences (p<0.05). Organoleptic test results yielded taste scores of 2.72 - 2.84, color scores of 1.44 - 4.88, aroma scores of 2.36 - 2.92, and texture scores of 2.04 - 2.36. However, the addition of butterfly pea flower extract at varying concentrations tended to reduce total soluble solids while increasing yeast count, total acidity, and enhancing color attributes in sensory evaluation.
Co-Authors A M Jannah A M Legowo A Prakoso A Purnomoadi A. Prakoso A. Purnomoadi A.M. Legowo Abdullah, Sabina Fairuz Jinan Agung Purnomoadi Agung Purnomoadi Ahmad Ni&#039;matullah Albaari Ahmad Ni’matullah Al-Baarri Al-Baarri, Ahmad Ni'matullah Anang M Legowo Andi Febrisiantosa Annisa Shafa Putri Arini Annisya, Shintya Wahyu Antonius Hintono Anum D Ari Wibawa Budi Santosa Arissaputra, Hermawan Asfan, Muhammad Ayu Anesakirani Ayu Ning Jagat Azalia Rohmani Surya Sari Bambang Dwiloka Bambang Sulistiyanto Barlian Rizal Bhakti Etza Setiani Bintoro, V Priyo Bintoro, V. Priyo C Imam Sutrisno Cecilia Ariantika Cicilia Nuryati Claradhita Ayu Shauma Clory Agustin Pienarso Cynthia Faradila Dea Erik Bahtiar Desnandia Radhika Ningsih Devi Yuniar Pristiana Dewandhaka Andaru Dian Handayani Dian Wahyu Harjanti Dina Azalea Handayani Duana Martha Saragih Dwi Ahmadi Dipowaseso Dwi Sunarti E. Widiastuti Edi Prayitno, Edi Eka Intan Kumala Putri El Fayyadh, Muhammad Ariq Ghoniy Elisabet Selly Andriani Elisabeth Febriane Lovita Sudjono endra fajar pratiwi Fahmi Arifan Farhandhia Devangga Fariza Amelia Anisa Fauzan Achmad Febryan Taufiq Felia Wahono Forsitawati, Fransiska Martaryza Fransisca Pramiarti Pasca H. I. Wahyuni Hafizh Azzam Hilmy Hanifah Mustika Wahda Heni Rizqiati Heni Rizqiati Hidayatul Munawaroh I. Isroli Ilma Muliasari Ramadhaningrum Indira Putri Negari, Indira Putri Indri Desy Natalia Siagian Indro Sumantri Ingke Endrina Istiyan PM Kafaah Estancia Kardina Enny Dian Kumalasari Kiryanto Kiryanto L D Ambara L.D. Ambara Lisa Harmi Susanti Lorentia Lydia Margareth Luqman Nauval Hakim Luthfiyah Nur Sulistiyani Maulida Rochmayani Melati Citra Anggraeni Mohammad Ihsan Yahya Prayoga Mohammad Kresna Bayu Muttaqin, Izza Wildani Nisa Ishma Savitry Nur Ismawati Nurul Aulia Octani Dwi Siswati Pangestu, Ridho Perdana, Gilang Ade Prasasti, Rahel Nathania Prasasti Prayoga, M. I. Y. Pujiyanto, Risang Putri Setyoningsih Putri, Naluri Amella Rahimi, Vini Rakita Dewi Mega Rani Widya Pramesthi Rio Sentosa ritna ningsih Rizqiati, H. S Mulyani S. Mulyani S. Sugiharto Sartono, T. A. Selma Husniah Ramadhiyana Elsadi Septiawati, Tria Setya Budi M. Abduh Setya Budi Muhammad Abduh, Setya Budi Muhammad Shindy Raviola Rizka Siti Susanti Siti Susanti, Siti Sri Kusmawati Sri Mulyani Sri Mulyani Sri Mulyani Sri Sumarsih Sulistiarto, Sigit Surya, Karina Rizqy Anggita SUSANTI, S. Sutaryo Sutaryo Suyadi Suyadi Syavira Aulia Tandrian, Christian taufiqi bagas ramadhani Tisqa Rizky Quna Triana Setyawardani Trisna Fitriana Turrini Yudiarti Ulfi Nihayatuzzahro Ardiani Yasinta V P Bintoro V. Priyp Bintoro V.P. Bintoro Valentinus Priyo Bintoro Vitus Dwi Yunianto Budi Ismadi Warsono Sarengat Wawan Budi Setyawan Widya Tamimi Wisnu Pangestu Setiaji Wiwid Rizqi Maryati Y B Pramono Yehezkiel Bobby Slamet Yoga Pratama Yoga Pratama Yoga Pratama Yosyfa Astiari Yoyok Budi Pramono Yoyok Budi Pramono Yoyok Budi Pramono Yoyok Budi Pramono Yoyok Budi Pramono Yudonegoro, Ridho Julio Yulindha Yulindha