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All Journal agriTECH Indonesian Journal of Biotechnology Indonesian Food and Nutrition Progress Jurnal Teknologi Hasil Pertanian Journal of Applied Agricultural Science and Technology
Dian Anggraini Suroto
Department Of Food Technology And Agricultural Product, Faculty Of Food Technology, Universitas Gadjah Mada, Jl. Flora Bulaksumur, Sleman, Yogyakarta Indonesia 55281
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology

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Microbiota Properties and Texture of Rice Flour Bread with Pineapple Starter Icca Ratna Danila; Rini Yanti; Dian Anggraini Suroto
Journal of Applied Agricultural Science and Technology Vol. 7 No. 3 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i3.130

Abstract

Changing the ingredients also can change the properties of the bread. In this study, bread was made using rice flour and sourdough. Sourdough with Lactic Acid Bacteria (LAB) and yeast can also be added with pineapple starter to help microbiota growth. The study aimed to determine the amount of microbiota produced from sourdough with pineapple addition and its effect on the texture of rice flour bread. Pineapples with water and sugar were fermented to make pineapple starter. Pineapple starter is then used in sourdough making and fermented around 3-6 days. The mature sourdough was used in bread making. The addition of pineapple, in the form of a starter, made the pineapple sourdough (PS) have lower pH and higher titratable acidity (TA), total Lactic Acid Bacteria (LAB), and total yeast than sourdough without the addition of pineapple starter or wheat sourdough (WS). The pH and TA of PS at the peak were 3.25 and 2.67 mL of NaOH. The total LAB of PS at the peak was 9.27 Log CFU/g, and the total yeast was 9.30 Log CFU/g. PS reached its peak on the third day, while wheat sourdough (WS) reached it on the sixth day. The pineapple sourdough bread (PSB) had the lowest specific volume, and the highest texture properties compared to control bread (CB) and wheat sourdough bread (WSB), but there is no significance different. The addition of pineapple starter can fasten the fermentation time of sourdough and made the bread less brittle than CB.
In silico analysis of antibiotic resistance genes in Lactiplantibacillus plan‐ tarum subsp. plantarum Kita‐3 Angelia Wattimury; Dian Anggraini Suroto; Tyas Utami; Rachma Wikandari; Endang Sutriswati Rahayu
Indonesian Journal of Biotechnology Vol 28, No 2 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.72550

Abstract

The absence of transferable antibiotic resistance genes is required for the safety of commercial probiotics. Previous studies have found that antibiotic resistance genes on plasmids in Lactobacilli make them unsafe for food purposes due to the genes’ ability to transfer to pathogenic microorganisms. In contrast, bacteria from the Lactobacillaceae family are widely used as a probiotic. This study assessed the antibiotic susceptibility of Lactiplantibacillus plantarum subsp. plantarum Kita‐3 (previously known as Lactobacillus plantarum K‐3) isolated from Halloumi cheese using eight antibiotics. Genome sequencing was performed using the Illumina NovaSeq 6000 sequencing platform to detect the presence of antibiotic resistance genes on chromosomes and plasmids. L. plantarum subsp. plantarum Kita‐3 was resistant to clindamycin, streptomycin, and chloramphenicol but susceptible to tetracycline, ampicillin, kanamycin, erythromycin, and ciprofloxacin. Genome sequencing of L. plantarum subsp. plantarum Kita‐3 verified the presence of tetracycline, fluoroquinolones, β‐lactamase resistance genes, and multidrug resistance efflux. Kita‐3 had no transposable elements, gene transfer agents, plasmid‐related functions, or intact prophages. Overall, this study produced the antibiotic resistance profile of L. plantarum subsp. plantarum Kita‐3 to assess the risk of transferring antibiotic resistance genes to other bacteria. The study provides essential data on the safe use of L. plantarum subsp. plantarum Kita‐3 as probiotics.
Properties of Instant Sourdough from Papaya (Carica papaya L.) Natural Starter and Its Effect on Bread Characteristics Yanti, Rini; Suroto, Dian Anggraini; Manikharda, Manikharda; Putri, Yuniar Wika Perdana
Journal of Applied Agricultural Science and Technology Vol. 9 No. 1 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i1.341

Abstract

Sourdough is made from water and wheat flour, fermented by lactic acid bacteria and yeast. Papaya can serve as a natural starter for producing sourdough. This study aims to assess the impact of drying on pH levels, total titratable acidity (% TTA), the viability of lactic acid bacteria (LAB), yeast viability, specific volume, and the texture profile of gluten and gluten-free bread. Three types of starters were used: P (fermented water from papaya and flour), G (fermented water from papaya, sugar, and flour), and W (mineral water and flour) to make type I sourdough (before drying). Type III sourdough (dried) was obtained using spray drying (S), cabinet drying (C), and freeze-drying (F). The pH, %TTA, LAB, and yeast viability were measured, while the specific volume and texture profiles of the breads were evaluated. Spray drying significantly affected the pH of the A sample and LAB viability in the W and G samples. Cabinet drying significantly affected the %TTA and yeast viability in the G sample. Freeze-drying significantly affected the LAB and yeast viability in the W and G samples, as well as yeast viability and %TTA in the P sample. Instant sourdough can be produced using spray, cabinet, or freeze drying and is suitable for making both gluten-containing and gluten-free bread. Variations in starter type and drying methods influence the bread's physical characteristics, including specific volume and texture profile. The drying methods significantly affected hardness, gumminess, chewiness, cohesiveness, springiness index, and resilience in both gluten-containing and gluten-free bread samples.
Effect Sourdough from Snake Fruit (Salacca zalacca) on Microbiota and Texture of Rice Flour Bread Nia Agustina; Rini Yanti; Dian Anggraini Suroto
Jurnal Teknologi Hasil Pertanian Vol 18, No 1 (2025): Februari
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jthp.v18i1.69234

Abstract

The use of fruit in the manufacture of sourdough provides nutrients and substrates that can improve the microbiota in sourdough and affect the characteristics of sourdough bread. The study aimed to determine the differences in the characteristics of the snake fruit sourdough microbiota on the effect of the texture of rice flour white bread. The snake fruit is peeled and cut to be fermented for several days, then the water from the snake fruit fermentation is mixed with flour to be fermented into the sourdough. Furthermore, it is applied to make plain bread with rice flour as a leavening agent. The results showed that the snake fruit starter had a LAB of 8.77 Log CFU/g and yeast 7.72 Log CFU/g with a pH of 3.62. Snake fruit sourdough (SDS) has a shorter fermentation time of 3 days to reach ripe sourdough and a pH of 3.25. The amount of Lactic acid bacteria (LAB) and yeast snake fruit sourdough (SDS) was higher than control sourdough (SDF) as follows BAL SDS 9.19 log cfu/g and Yeast SDS 9.42 log cfu/g while LAB SDF 9.03 Log CFU/g and Yeast SDF 9.07 Log CFU/g. The specific volume of SDS is similar to that of commercial SDF and baker's yeast. SDS has a small pore size of 16.29 mm2 so the cells found are higher, namely 6.31 cells/cm2. The use of snake fruit sourdough produced bread with higher hardness, gumminess, and chewiness, but the springiness, cohesivity, and resilience were similar to those of control sourdough bread and commercial yeast bread. In this study, the use of SDS was faster in fermentation time on day 3 SDS had reached its optimal level compared to SDF.
Effects of Mixed Yeast Fermentation on Volatile Compounds Composition of Arabica Coffee Beans Utami, Whitney Jovanka; Suroto, Dian Anggraini; Setyabudi, Francis Maria Constance Sigit; Davinia, Alyssa Putri; Ratri, Dyah Sekar Purnama
agriTECH Vol 45, No 2 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.87365

Abstract

Coffee is part of the most highly valued agricultural commodities, and fermentation is an alternative method to enhance the quality of coffee beans. Therefore, this study aimed to assess the effects of Wickerhamomyces anomalus and Kluyveromyces lactis on the fermentation of Arabica coffee, particularly the contributions to volatile compounds formed in roasted beans. The fermentation process was further carried out by incorporating W. anomalus and K. lactis for 48 hours at room temperature. The results showed that fermenting for 12 hours with mixed yeast inoculation significantly increased the total yeast count and volatile compounds. Additionally, the fermentation of Arabica coffee with mixed yeast inoculation at a 1:1 ratio produced the highest total titratable acidity and yeast count. The release of volatile compounds varied based on the activity of the microorganisms with the highest concentrations of naphthalene, α-himachalene, toluene 2, 4-diamine, and 3-pentanol detected in the samples. These results suggested that fermenting Arabica coffee with W. anomalus and K. lactis not only enhanced bean quality but also held promise for industrial application.
Boiler Ash of Oil Palm Shell as Adsorbent for Lead Adsorption Nurdiansyah, Nurdiansyah; Hidayat, Chusnul; Suroto, Dian Anggraini
agriTECH Vol 45, No 2 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.93514

Abstract

Palm oil shells and fibers are widely used as fuel for factory boiler furnaces. However, boiler ash residue produced is often underutilized. This study aims to explore the use of boiler bottom ash (BBA) as an adsorbent for the adsorption of lead (Pb) and its subsequent application in palm oil mill effluent (POME) purification for water dilution in crude palm oil (CPO) processing. BBA was activated using 0.2, 0.4, 0.6, and 0.8 mol/L potassium hydroxide (KOH) solutions for 24 hours, and the carbonation was conducted at 400°C for 60 minutes. Factors, such as the concentration of KOH for BBA activation, pH levels, adsorption temperature, adsorption kinetics, and the application of the adsorbent in POME purification for water dilution in the CPO processing model, were evaluated. The results showed that the optimal KOH concentration was 0.4 mol/L, as determined by SEM, EDX, and lead adsorption analysis. The maximum adsorbent capacity of approximately 0.43 mg/g was obtained at 50°C and pH 4.6, with an adsorption rate constant of 5.97 per minute. The results also showed that the adsorption process followed the Langmuir model. In addition, the adsorption activation energy and the Arrhenius constant values were -28675.82 J/mol and 0.0001, respectively. The use of POME filtrate for water dilution had no effect on the free fatty acids, water content, impurities, or DOBI (Deterioration Bleachability of Index) in CPO. Lead value showed significant differences in all treatments without dilution. These results indicate that BBA activated with KOH can function as an adsorbent to reduce lead content. POME purified with BBA adsorbent has the potential to be used as diluent water in CPO processing to reduce raw water use and ultimately decrease POME production.
Pulp Reduction and Addition of Indigenous Microorganisms as Starter: Effects on Fermented Cocoa Bean Characteristics Fajariyah, Anna; Rahayu, Endang Sutriswati; Farianti Djaafar, Titiek; Utami, Tyas; Anggraini Suroto, Dian; Marwati, Tri
agriTECH Vol 45, No 3 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.86796

Abstract

Indonesian cocoa smallholder plantations frequently produced low-quality dry beans due to poor postharvest handling, necessitating improvements through controlled fermentation. This study evaluated pulp reduction and local microorganism starter addition in farmer-level cocoa fermentation on the microbiological, physical, and chemical properties of cocoa beans. Using a Factorial Randomized Block Design, the research included four experimental units: 1) spontaneous fermentation, 2) reduced-pulp fermentation, 3) starteradded fermentation, and 4) reduced-pulp and starter-added fermentation. Pulp was reduced by approximately 35%, and microorganisms utilized were Candida famata HY-37, Lactiplantibacillus plantarum subsp. plantarum HL-15, and Acetobacter sp. HA-37. The five-day fermentation resulted in the growth of yeast, lactic acid bacteria (LAB), and acetic acid bacteria (AAB). This was indicated by a peak fermentation temperature of 45 °C, a decrease in fermentation pH to 3.7, and a decrease in bean pH to 4.7, in line with total titratable acidity increasing. Over the course of two days, the Fermentation Index aboved 1.0. Pulp reduction raised fermentation temperatures and resulted in an earlier peak by the third day. The use of a starter can suppress fungal growth during fermentation. The total fungal population is lower in combining pulp reduction with starter addition fermentation cocoa beans. The physical properties met the Indonesian National Standard (SNI) 2323:2008/Amd I:2010. The chemical characteristics showed that the Fermentation Index was above 1.0, the bean pH values were from 5.16 to 5.36, and the reducing sugar contents were from 1.50 to 1.69 %. Incorporating starter treatment effectively inhibited fungal growth during fermentation. The combination of reducing pulp and adding starter inhibited fungal growth in fermented cocoa beans without affecting their physical and chemical properties.
The Effect of Fermentation and Storage Temperature on the Viability of Lactiplantibacillus plantarum subps. plantarum Dad-13 on Yogurt-Like Drink Aristya, Aristya; Utami, Tyas; Suroto, Dian Anggraini; Rahayu, Endang Sutriswati
Indonesian Food and Nutrition Progress Vol 21, No 2 (2024)
Publisher : Indonesian Association of Food Technologists

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ifnp.87229

Abstract

This study aims to assess the viability of the cell population during the fermentation process and storage at various temperatures. Probiotic bacteria, Lactiplantibacillus plantarum subsp. plantarum Dad-13, procured from the Center for Food and Nutrition Studies UGM, was utilized as a starter in manufacturing a yogurt-like drink. During the manufacture of the yogurt-like drink, cell counts were evaluated prior to and following a 12-hour fermentation period at temperatures of 30 ℃, 37 ℃, and 42 °C. The samples that have the highest viability cell (30 °C) were selected for further study and stored for 25 days at 26 °C, and for 50 days at 10 °C and 4 °C. The cell count was assessed every 5 days using MRS Media.The result indicates that fermenting at 42 °C led to a notably lower cell growth rate of 0.2 log cycles compared to fermenting at 30 °C and 37 °C, leading to cell growth of 1.37 and 1.31 log cycles, respectively. The viability of Lactiplantibacillus plantarum subsp. plantarum Dad-13 in a yogurt-like drink was not significantly different after being stored for 50 days at temperatures of 10 °C and 4 °C. The decline in cell counts of Lactiplantibacillus plantarum subsp. plantarum Dad-13 in samples stored at 10 °C and 4 °C was 0.65 and 0.34 log cycles, respectively. Conversely, at 26 °C, the viability decreased significantly, resulting in a reduction in number of 2.05 log cycles.
Co-Authors Angelia Wattimury Aristya, Aristya Chusnul Hidayat Davinia, Alyssa Putri Endang Sutriswati Rahayu Endang Sutriswati Rahayu Fajariyah, Anna Farianti Djaafar, Titiek Icca Ratna Danila Manikharda, Manikharda Nia Agustina Nurdiansyah Nurdiansyah Putri, Yuniar Wika Perdana Rachma Wikandari Ratri, Dyah Sekar Purnama Rini Yanti Rini Yanti Rini Yanti, Rini Setyabudi, Francis M.C. Sigit Tri Marwati Tyas Utami Tyas Utami Utami, Whitney Jovanka