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Rodiatul Adawiyah; Muhammad Suwignyo Prayogo; Vivi Maratus Sholihah; Siti Waaqi’ah Khofidhotur Rofiah

Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa 2026 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

This study aims to critically analyze bioethanol production from water hyacinth (Eichhornia crassipes) based on previous research findings and to develop a project-based learning design for SMA/SMK students. This study employs a qualitative approach using a literature review method by analyzing relevant scientific articles published in the last five years. Data were collected through documentation and analyzed using descriptive qualitative techniques, including data reduction, data display, and conclusion drawing. The findings indicate that bioethanol production efficiency is strongly influenced by pretreatment methods, fermentation conditions, and process control, with yields generally categorized as low to moderate. Previous studies also reveal that project-based learning significantly enhances students’ conceptual understanding and critical thinking skills. Based on the synthesis of these findings, this study proposes a structured project-based learning design that integrates bioethanol production as a contextual learning medium. The implications of this study emphasize the importance of aligning technical feasibility, educational objectives, and sustainability principles in developing science-based learning projects in secondary education.

Mizan Affan; Sutaman Sutaman; Ninik Umi Hartanti

Manfish: Jurnal Ilmiah Perikanan dan Peternakan 2026 Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Vaname shrimp (Litopenaeus vannamei) has a fast growth rate, good tolerance to a wide range of salinity and temperature, and resistance to several common shrimp diseases. Vaname shrimp has an efficient feed conversion making it more economical to cultivate, and its international market demand is high. The research method used four treatments of fermented soybean meal doses, namely 0% (control), 15%, 25%, and 35%, each with 3 replications. The feed was formulated using Pearson’s Square method targeting 35% protein, and the soybean meal was fermented using tempe yeast method. The observed parameters included daily growth rate (%), absolute weight gain (grams), survival rate (%), feed utilization efficiency (FUE), and feed conversion ratio (FCR). The results showed that the treatment with 25% fermented soybean meal dose gave the best results with a daily growth rate of 6.42%, absolute weight gain of 0.22 grams, survival rate of 90.66%, and the highest feed utilization efficiency of 0.66.

Hari Mulia; Suca Rusdian; Junaedi Junaedi; Andri Muhamad Nuroni; Mia Kusmiati +4 more

International Journal of Management Science and Entrepreneurship 2026 International Forum of Researchers and Lecturers

This study analyzes the strategic role of quality-based marketing models in enhancing the competitiveness of kombucha products, with a specific focus on Rumah SCOBY DBA, produced by the Yayasan Dharma Bintang Akademia. By integrating Total Quality Management (TQM), Quality Assurance (QA), and Quality Control (QC), the research explores how quality-driven frameworks contribute to marketing effectiveness, consumer trust, brand positioning, and sustainable performance in the functional beverage industry. Employing a Systematic Literature Review (SLR) combined with conceptual analysis, the study systematically examined publications from 2015 to 2025 across leading academic databases, focusing on themes of quality management, functional beverage marketing, kombucha production, consumer behavior, and digital strategies. The findings reveal that product quality—characterized by fermentation stability, microbiological safety, and nutritional consistency—serves as the primary driver of consumer purchase intention. Process quality, through standardized SOPs, hygiene protocols, and traceability systems, reinforces credibility, while service quality, including transparent labeling, health education, and digital engagement, strengthens brand trust. Integrating TQM principles into marketing fosters consumer loyalty, differentiates brands in competitive markets, and supports long-term sustainability. This study provides practical guidance for producers, community-based enterprises, and policymakers to adopt quality-driven marketing models, offering a novel conceptual framework tailored to kombucha products and mapping future research directions in functional beverage innovation.

Lestari Lestari; Rizki Amelia Nasution

Jurnal Cakrawala Pendidikan dan Biologi 2025 Asosiasi Riset Ilmu Pendidikan Indonesia

The normal flora of chickens refers to the microbial communities that naturally inhabit the gastrointestinal tract and body surfaces of chickens, playing a crucial role in health, digestion, and immunity. This community consists of beneficial bacteria such as Lactobacillus, Bifidobacterium, and Bacillus, which assist in feed fermentation, vitamin synthesis, and inhibition of pathogenic growth. Additionally, the normal flora may include potential pathogenic bacteria such as Escherichia coli, Salmonella spp., and Campylobacter, which can cause diseases if microbial balance is disrupted. The diversity and balance of the microbiota are influenced by various abiotic factors, including feed quality, access to clean water, ambient temperature, humidity, and environmental hygiene. Biotic factors, such as microbial interactions, rearing systems, and contact with other animals, also play a significant role in determining microbial composition. Several studies have shown that the use of feed additives, such as probiotics and phytogenics, can enhance populations of beneficial bacteria while suppressing pathogenic bacteria. Extensive rearing systems, which provide chickens with more space and exposure to natural environments, tend to increase microbiota diversity compared to semi-intensive systems with more restricted conditions. Understanding these factors is essential for developing effective health management strategies and optimizing safe and sustainable poultry production.

Arfah Maulani Ashari; Anisa Ramadhani; Muthia Fayza Lubis; Muhammad Azril Rizky Ramadhan; Putra Julianto Nugraha +2 more

Zoologi: Jurnal Ilmu Peternakan, Ilmu Perikanan, Ilmu Kedokteran Hewan 2025 Asosiasi Riset Ilmu Tanaman dan Hewan Indonesia

This study aims to analyze the effect of using cassava (Manihot esculenta crantz) as a carbohydrate-based feed ingredient on body weight gain in beef cattle. The review was conducted using a descriptive literature study approach based on sixteen scientific articles discussing the nutritional composition, processing methods, and performance responses of beef cattle fed cassava-based diets. The analysis shows that cassava contains 17.45–88.6% dry matter, 2.4–21.45% crude protein, and 11.35–92.2% nitrogen-free extract, with variations influenced by plant part, processing method, and hydrocyanic acid (HCN) content. Processing techniques such as fermentation and ensiling can reduce HCN levels by more than 70% while increasing crude protein content up to 25%, thereby improving digestibility and feed efficiency. The inclusion of cassava in the form of flour, dried chips, pulp, or fermented peel consistently enhances dry matter intake and average daily gain (ADG) of beef cattle at inclusion levels of 20–50% in the diet. Overall, cassava has strong potential as a locally available, economical, and sustainable feed ingredient to improve beef cattle productivity.

Haykal Heryawan; Putri Salbilah Taharoh; Maora Amelya Setiawan; Muhammad Rayhan Arrafii; Husnul Fikri

Jurnal Manajemen Kewirausahaan dan Teknologi 2025 Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

This study aims to improve the effectiveness of facility arrangement at Pabrik Oncom Bu Nana by analyzing interactions among production activities and designing spatial layouts based on their priority levels. The current layout presents several critical issues, particularly because the equipment sanitation area is combined with the toilet, creating a significant risk of contamination and reducing hygiene during production. In addition, irregular material flow and excessive worker movement lead to inefficient work processes and may affect the quality of the final product. To address these issues, this study employs the Activity Relationship Chart (ARC) to evaluate the functional closeness among production areas, as well as the Total Closeness Rating (TCR) to determine facility placement priorities based on the intensity of inter-stage relationships. The results of the ARC analysis indicate that the fermentation room has the strongest link to the main stages of oncom production, requiring its placement to be closer to the preparation and molding areas. Findings from the TCR further emphasize that fermentation should become the primary focus in the layout redesign. Based on both methods, a more organized layout design is proposed by relocating the fermentation room to the beginning of the production flow, separating the toilet and sanitation room into two distinct areas, and restructuring the storage, molding, and drying spaces. This redesigned layout is expected to enhance cleanliness, improve material flow, and strengthen the operational effectiveness of Pabrik Oncom Bu Nana.

Nasihah, Nila Durrotun; Moch Alvin Najich Robbany; Ningrum, Ria Putri; Salma Affro; Nur Intan Mutiara +7 more

Manfaat : Jurnal Pengabdian Pada Masyarakat Indonesia 2025 Asosiasi Riset Ilmu Tanaman Dan Hewan Indonesia

This community service article presents the implementation of the GELORA outreach and training program conducted in Sebanen Village, Jember, Indonesia, focusing on the promotion of low-cost and eco-friendly fermented feeds formulated from locally available agricultural residues such as papaya leaves, rice bran, molasses, and EM4. The program aimed to strengthen the capacity of smallholder catfish farmers and the village enterprise (BUMDes) through a series of integrated activities including a rapid needs assessment, hands-on training sessions, technical mentoring, and knowledge dissemination. As a result, participants demonstrated improved technical skills in household-scale feed formulation and fermentation, a stronger understanding of sustainable and circular economy principles, and an increased willingness to adopt environmentally friendly aquaculture practices. Moreover, follow-up mentoring groups were established to ensure program continuity and local innovation. This participatory model effectively combines community engagement with scientific evidence in aquaculture nutrition and is suitable for replication in other rural aquaculture development contexts.

Setiana Safitri; Ardi Mustakim

Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Tempoyak is a traditional fermented paste made from durian in Indonesia, favored by the Malay ethnic group. While tempoyak holds a unique and significant place in Indonesia's rich culinary diversity, there is a notable gap in research about it compared to other fermented foods such as kimchi. More investigation is essential to grasp the microbial composition, interactions, and possible health advantages of tempoyak, which may offer benefits like boosting the immune system, reducing cholesterol levels, exhibiting probiotic qualities, preservation, and possessing antibacterial effects. Researchers could also discover vital insights regarding the history, cultural significance, production methods, microbiological issues, nutritional aspects, and future prospects of local foods like tempoyak. This research intends to examine and study tempoyak as a traditional fermented food through comprehensive literature review and data from earlier investigations. Tempoyak has a strong connection to Malay cultural identity, regardless of its production location. As a key element of the daily practices of the Malay people in Indonesia, tempoyak is typically featured at cultural events, weddings, or large gatherings. This cultural importance sets Indonesian tempoyak apart from its Malaysian counterpart. The process of making tempoyak involves mashing the durian flesh, mixing in salt, and letting the combined mixture ferment in a sealed container at room temperature for 4 to 7 days. The microbial population in tempoyak can differ but mainly includes Lactobacillus species, particularly Lactobacillus plantarum. Proximate analysis is an effective approach to evaluate the nutritional makeup of tempoyak. Differences in nutrient levels may arise from the various types of durian, salt elements, sterilization periods, temperatures, and length of fermentation. Potential research opportunities could explore tempoyak’s role in fostering sustainable food practices, additional health benefits from its consumption, and the development of innovative products based on tempoyak. The aim of this study will enhance the field and aid in safeguarding and promoting the culinary heritage of the Malay community.

Edya Moelia Moeis; Mukhlison Mukhlison; Meisya Alma Azizah

Jurnal Riset Rumpun Ilmu Tanaman 2025 Pusat riset dan Inovasi Nasional

The growing demand for organic fertilizers as an alternative to chemical fertilizers is in line with increasing public awareness of environmentally friendly agriculture. Meanwhile, livestock waste, particularly rabbit urine, remains underutilized and is often discarded, despite its high nitrogen, phosphorus, and potassium content and potential as a raw material for liquid organic fertilizer (LOF). This study aims to design and develop a simple technological innovation for processing rabbit urine into economically valuable LOF, offering new business opportunities for local communities. Another objective is to advance bioactivator-based processing technology to produce an effective, marketable, and eco-friendly organic fertilizer that enhances plant growth. The research employed an applied research method with an experimental approach, including collection and processing of rabbit urine, simple production of LOF, effectiveness testing on horticultural crops with local farmers, and analysis of business feasibility and local marketing strategies. The study resulted in a simple bioactivator-based technology for converting rabbit urine into LOF through a fermentation process of more than 14 days, producing fertilizer rich in nitrogen, phosphorus, and potassium. The LOF improved horticultural crop growth by 25–30% compared to control plants. The group business model provides livestock farmers with new business opportunities, achieving profit margins between 40% and 50%. This research produced a replicable technology guide and usable LOF product, contributing to waste reduction and supporting sustainable agriculture through community-based entrepreneurship.

Iswanty, Trian; Sholahuddin, Sholahuddin; Hartanti, Lucky

JITIPARI (Jurnal Ilmiah Teknologi dan Industri Pangan UNISRI) 2025 Universitas Slamet Riyadi Surakarta

Purple sweet potato yogurt is a form of local food innovation made from milk fermented by lactic acid bacteria (LAB), with the addition of purple sweet potato paste to enhance flavor and color, thereby increasing consumer appeal. During fermentation, LAB require carbon derived from carbohydrates as an energy source for their metabolism and growth. Differences in carbon sources are expected to influence and produce distinct yogurt characteristics. Therefore, this study aimed to investigate the effect of various carbon sources on the characteristics of purple sweet potato yogurt. The experiment was conducted using a Randomized Block Design (RBD) with a single treatment factor: the type of carbon source. Six treatments were tested, namely: no sugar (control), granulated sugar, palm sugar, sugarcane juice, coconut sugar, and honey. The results indicated that different carbon sources caused variations in total dissolved solids, total lactic acid bacteria, total titratable acidity, and total reducing sugars. Carbon sources significantly affected titratable acidity, reducing sugar content, total dissolved solids, color, taste, and the overall sensory evaluation of purple sweet potato yogurt. The yogurt produced exhibited titratable acidity values ranging from 1.69% to 1.86%, reducing sugar content from 1.11% to 1.46%, total LAB counts from 0.28 to 89.50 × 10¹0 CFU/g, and total dissolved solids from 10.25 to 17.75 °Brix. Sensory evaluation scores ranged as follows: color preference 2.83–4.26 (dislike to like), texture 3.43–3.76 (like), aroma 3.53–3.70 (like), taste 2.67–3.70 (dislike to like), and overall acceptability 3.43–3.90 (like).

Lutfi, Mohammad; Azzahra, Fadlia; Pomuruh, Felix Kristianto; Manggau, Gemaliany Pilo; Syamsuddin, Syamsuddin +2 more

JITIPARI (Jurnal Ilmiah Teknologi dan Industri Pangan UNISRI) 2025 Universitas Slamet Riyadi Surakarta

Tofu is a common food made from soybeans. However, because soybeans have limitations in terms of availability, other alternative ingredients such as palm kernel meal (BIS) are needed. The purpose of this study was to determine the best concentration of palm kernel meal added to tofu making so as to reduce dependence on the use of soybeans. The study was designed using a completely randomized design with 1 factorial, namely the concentration of BIS and soybeans. The concentration variations used were: A1 (control, 100% soybean), A2 (25% BIS: 75% soybean), A3 (50% BIS: 50% soybean), and A4 (75% BIS: 25% soybean). The parameters tested were BIS crude fiber, proximate analysis and tofu organoleptic. The results showed that BIS after fermentation experienced a decrease in crude fiber from 27.25 to 18.375%. Based on the proximate analysis, the variation of 75% BIS: 25% soybean is the best concentration with the highest protein content of 45.14%. Likewise, the moisture, ash, fat and carbohydrate content obtained were 79.05; 1.00; 6.20; and 0.96%. The organoleptic showed the level of panelists' liking for color, aroma, texture and taste with the value of panelists' liking level respectively 3.11; 4.09; 3.6 and 3.96 which indicates that this product can be accepted by the community.

Felisha Putri Maida; Ardi Mustakim

Polygon : Jurnal Ilmu Komputer dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Cassava tapai is a traditional Indonesian food product produced through the fermentation of cassava (Manihot esculenta) with the help of microorganisms, particularly the yeast Saccharomyces cerevisiae. This product not only has cultural and economic value but also contains bioactive compounds with health benefits, such as probiotics and fermentation metabolites. However, the quality of cassava tapai is significantly influenced by process factors, particularly incubation time. This study aimed to analyze microbial growth and changes in the chemical properties of cassava tapai with varying fermentation times. The study was conducted using an experimental design with fermentation times of 24, 48, and 72 hours at room temperature. The main parameters observed included the number of microbial colonies (cfu/g), pH changes, and alcohol content produced during the fermentation process. The results showed that microbial growth increased significantly, peaking at 48 hours, with the highest colony count compared to other treatments. After 72 hours, the number of colonies decreased, likely due to ethanol accumulation and decreased substrate availability, which reduced microbial activity. The pH value tended to decrease with increasing fermentation time, reflecting the formation of organic acids during the process. Meanwhile, the alcohol content showed an increasing trend from the beginning to the end of fermentation, although the growth rate was relatively slower at 72 hours. These findings confirm that varying incubation length significantly influences microbial dynamics and chemical changes in cassava tapai. The optimal fermentation time is around 48 hours, as this is the phase where the balance between microbial growth, alcohol formation, and sensory characteristics is maintained. The results of this study can serve as a basis for developing standards for cassava tapai production at both household and industrial scales, while also strengthening efforts to preserve traditional foods with a modern scientific approach.

Safitri Rahmat; Nadila Nadila; Deswita Deswita; Sasmita Putri Hairani; Yeyen Yeyen +1 more

Polygon : Jurnal Ilmu Komputer dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Various recent studies have shown that natural active compounds contained in traditional and fermented plants play a crucial role in supporting human health. These compounds include flavonoids, polyphenols, tannins, saponins, alkaloids, organic acids, probiotics, and other phenolic compounds. Detection of these compounds is usually carried out through specific chemical reactions that allow researchers to more precisely identify the bioactive components. Their biological activities are diverse, including antioxidant, antibacterial, anti-inflammatory, and antimicrobial properties, which work to protect the body from cell damage and infection. Natural compounds are considered promising agents for disease prevention and health promotion due to their broad biological activities. The fermentation process has been shown to increase the content of bioactive compounds while lowering the pH of the medium, creating conditions unfavorable for the growth of pathogenic bacteria. Furthermore, probiotics that develop during fermentation play a role in maintaining the balance of the gut microbiota, strengthening the immune system, and improving digestive health. Fermented products are widely recognized as functional foods because they contain beneficial probiotics and enhanced bioactive compounds. These naturally derived products, rich in secondary metabolites, have also been shown to have significant physiological effects, such as lowering cholesterol levels, controlling blood sugar, and maintaining stable blood pressure. This makes natural ingredients and fermented products not only sources of nutrition but also have great potential for development as functional foods and traditional herbal medicines. This highlights the importance of integrating traditional knowledge with modern scientific approaches in developing functional foods and herbal medicines. Therefore, research on natural bioactive compounds and the role of fermentation in enhancing their effectiveness is highly relevant to supporting sustainable public health.  

Isnaini Yulia Lestari; Ardi Mustakim

Jurnal Pendidikan Kimia, Fisika dan Biologi 2025 Asosiasi Riset Ilmu Pendidikan Indonesia

Bekasam is a traditional Indonesian fermented product made from tilapia (Oreochromis niloticus) through a spontaneous fermentation process with the addition of rice and salt. This fermentation process encourages the growth of various microorganisms, especially bacteria, which play a role in the formation of flavor, aroma, and natural preservation of the product. This study aims to observe the microbiological characteristics of bekasam tilapia through colony observation on agar media and microscopic staining using crystal violet and safranin. Macroscopic observations showed the presence of microbial colonies that were round, cloudy white, with a smooth surface and even edges. These colony characteristics indicate good microbial growth on agar media. Microscopically, the bacteria observed in bekasam samples had an irregular distribution, forming aggregates that absorbed intense purple and pink colors. Crystal violet staining gave a purple color to gram-positive bacteria, while safranin gave a pink color to gram-negative bacteria. These findings indicate that bekasam contains an active microbial community that plays a role in the fermentation process. This microbial community can be observed visually through simple staining that provides an overview of the types of bacteria involved in the fermentation process. Microbiological analysis such as this is crucial for understanding the fermentation dynamics of traditional food products like bekasam. Thus, this study provides deeper insight into the microorganisms involved in bekasam production, as well as the importance of monitoring microbiological quality in the manufacturing process of traditional fermented products. Furthermore, the diversity of microbes involved in bekasam fermentation can affect product quality and consistency. Therefore, monitoring the dominant bacterial species during the fermentation process is crucial for maintaining bekasam quality, including its taste, texture, and safety for consumers.

Tata Anggraini; Ardi Mustakim

Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Tempoyak is a traditional fermented product derived from the flesh of durian fruit (Durio zibethinus) that has undergone a spontaneous fermentation process. This product is very popular in various regions in Indonesia, especially in Sumatra and Kalimantan, and is usually consumed as a cooking spice or side dish. The fermentation process primarily involves the activity of lactic acid bacteria (LAB), a group of microorganisms capable of converting acidic sugars into lactate. LAB plays an important role in forming the distinctive taste of tempoyak, lowering pH, inhibiting the growth of pathogenic microbes, and potentially providing health benefits for consumers. This study aims to isolate and characterize LAB from tempoyak using a microbiological approach. Tempoyak samples were taken from traditional markets, then isolated using MRS agar measurement media. Characterization was carried out through observation of colony morphology, Gram staining, and biochemical tests such as catalase and fermentation of various types of sugars (glucose, sucrose, and maltose). The isolation results showed that all isolates had the typical LAB characteristics, namely Gram-positive, catalase-negative, and rod- and coccus-shaped. The different sugar fermentation abilities indicate species diversity, with the suspected dominant genera being Lactobacillus, Streptococcus, Enterococcus, and Lactococcus. Furthermore, several isolates demonstrated antibacterial activity against Escherichia coli, indicating the potential use of LAB from tempoyak as a probiotic or natural preservative in the food industry. The decrease in pH from 6.2 to 3.6 during the fermentation process also confirmed the metabolic activity of LAB in acid-producing lactate. These findings open up opportunities for utilizing local LAB from tempoyak as functional agents in the development of safe, healthy, and economically valuable fermented food products. Thus, tempoyak not only has cultural value but also has significant scientific and commercial potential.

Khusnul Khotimah Rijie; Ardi Mustakim

Polygon : Jurnal Ilmu Komputer dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Fish bekasam is one of Indonesia's traditional fermented products that involves the activity of microorganisms, especially lactic acid bacteria (LAB), to produce unique organoleptic, chemical, and microbiological characteristics. The fermentation process of bekasam plays a significant role not only in extending the shelf life of fish but also in creating a distinctive sour taste and texture that differs from other fish products. This study aims to analyze the microbiological community involved in the fish bekasam fermentation process through observation and identification of bacteria using Safranin Violet and Iodine staining techniques. This study employs a literature review approach, examining various references related to the fermentation process, the dominant bacteria species, and the environmental factors that affect the quality of bekasam. The analysis revealed that lactic acid bacteria such as Lactobacillus plantarum, Lactobacillus casei, and Pediococcus spp. play an important role in the fermentation of bekasam fish. These bacteria produce lactic acid, which contributes to the sour taste and plays a role in forming the product's texture. The Safranin Violet and Iodine staining techniques were effective for identifying bacteria based on their cell wall characteristics, with Gram-positive bacteria dominating the fermentation process. Environmental factors such as the fermentation time, salt concentration, and the addition of ingredients like carbohydrates or turmeric extract influence the dynamics of bacterial populations in the fermentation of bekasam. This study also emphasizes the importance of controlling pathogenic bacterial contamination, such as Salmonella spp. and Escherichia coli, to ensure food safety in bekasam products. The findings provide a deeper understanding of the microbiological dynamics in fish bekasam fermentation and the relevance of staining techniques in microbiological analysis, which can be used to improve the quality and safety of traditional fermented products. This study also opens opportunities for developing safer and higher-quality bekasam products.

Annisa Tuzzahra; Ardi Mustakim

Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Cassava tape is a traditional fermented product widely consumed in Indonesia, especially in rural areas. It is produced from cassava (Manihot esculenta) through the activity of microorganisms during the fermentation process. The presence of microbes in this process plays a crucial role in the flavor, aroma, texture, and final quality of the product. The microorganisms involved, including bacteria, molds, and yeasts, work synergistically to break down the carbohydrate components of cassava into simpler products, resulting in the sweet taste and distinctive aroma of tape. This study aimed to identify and characterize the microbes present in cassava tape through isolation and microscopic staining using safranin. The isolation process involved several stages: sequential sample dilution, inoculation onto Nutrient Agar (NA) media using the pour method, and incubation at 37°C for 24 hours. The growing microbial colonies were observed macroscopically, then collected and subjected to simple safranin staining to determine the shape and distribution pattern of the microbial cells microscopically. Observations revealed colonies with diverse morphologies, including rod-shaped (bacilli) and spherical (cocci), evenly distributed across the observation area. This indicates that cassava tape contains microorganisms of various morphologies that play a role in the fermentation process. Simple safranin staining has been shown to provide an initial overview of the presence and form of microbes, although further identification to the genus or species level requires further tests such as Gram staining, biochemical tests, and molecular analysis. These findings open up opportunities for further in-depth research into consumption safety, the functional role of microbes in tape fermentation, and its potential use as a source of natural probiotics in traditional fermented foods.  

Zaskia Rahmawati; Ardi Mustakim

Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Bekasam is a traditional fermented fish product commonly produced in South Sumatra and South Kalimantan, known for its distinctive sour taste resulting from the metabolic activity of lactic acid bacteria (LAB). LAB play a crucial role in the fermentation process, contributing to the product’s flavor, texture, and safety. This study aimed to isolate, identify, and characterize LAB from bekasam made using tilapia (Oreochromis niloticus). Isolation of bacterial strains was performed using the pour plate method on Nutrient Agar (NA) medium at various serial dilutions to obtain discrete colonies. The colonies were observed macroscopically to assess their morphological characteristics, including shape, size, color, surface texture, and edge profile. Further identification involved Gram staining to determine cell wall type and microscopic morphology. The results revealed that the bacterial colonies were generally small, round, white to cream in color, with smooth surfaces and flat edges. Gram staining demonstrated that the dominant isolates were Gram-positive bacteria, exhibiting rod-shaped or oval morphology. These characteristics are consistent with members of the genus Lactobacillus sp., a common LAB group in fermented fish products. Additional phenotypic traits observed included catalase-negative reactions, absence of spore formation, and the ability to produce lactic acid as the main metabolic end product. The combination of morphological, staining, and basic biochemical characteristics supports the initial identification of the isolates as LAB. The presence of Lactobacillus sp. in bekasam suggests their significant contribution to the fermentation process, influencing the product’s sourness, safety, and preservation. The findings of this study provide a basis for further molecular characterization and potential selection of LAB strains as starter cultures to improve the quality, consistency, and safety of bekasam in traditional and industrial production.

Tassa Tassa; Ardi Mustakim

Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Bekasam is a traditional fermented food made from snakehead fish (Channa striata) through spontaneous fermentation with the addition of salt and rice over several days. This fermentation process promotes the growth of indigenous microorganisms, particularly lactic acid bacteria (LAB), which play a crucial role in developing distinctive flavors and potentially providing health benefits. LAB are well-known for their probiotic effects, such as maintaining gut microbiota balance and enhancing immune system function. This study aimed to identify the presence of LAB in bekasam using the Gram staining method. Samples were taken from bekasam that had been fermented for three days. Bacterial isolation was conducted by culturing the samples on appropriate media, followed by Gram staining to observe bacterial morphology and cell wall characteristics under a microscope. Observations revealed a predominance of Gram-positive, rod-shaped (bacillus) bacteria, which are the primary morphological characteristics of LAB. This morphology is consistent with bacterial groups such as Lactobacillus spp., which are commonly found in traditional fermented products. These findings strengthen the assumption that snakehead fish–based bekasam is not only a traditional food source with rich flavors but also has potential as a natural probiotic source. This potential opens opportunities for bekasam to be developed as a functional food that supports digestive health and immune function. Further research is recommended to perform molecular identification to accurately determine bacterial species and to evaluate their probiotic activity in vivo. Thus, bekasam holds not only cultural and culinary value but also added value in the field of health and the functional food industry.

Rifky Rifaldo Munthe; Ardi Mustakim

Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Bekasam, a traditional Indonesian fermented fish product, is produced through a natural fermentation process involving complex microbial communities, particularly fermentative bacteria. These microorganisms play a vital role in developing the product’s characteristic flavor, aroma, and texture. This study aimed to identify the morphological characteristics of fermentative bacteria present in bekasam made from Nile tilapia (Oreochromis niloticus) using direct microscopic observation without staining. Fresh samples of bekasam were collected and subjected to serial dilution before being cultured on nutrient agar (NA) medium. The cultures were incubated at room temperature for 24–48 hours to allow colony formation. Morphological examination was carried out by observing the colonies directly under a light microscope to assess cell shape, size, and arrangement. The results demonstrated a diversity of bacterial morphologies, with the majority consisting of rod-shaped (bacillus) and spherical (coccus) forms. Bacillus cells were often observed singly or in short chains, whereas coccus cells appeared either as single units, in pairs (diplococci), or forming short chains (streptococci). The morphological diversity observed suggests that multiple bacterial species may be involved in the fermentation process, each contributing differently to biochemical transformations such as protein degradation, lactic acid production, and flavor compound formation. Although morphological characterization alone cannot provide definitive bacterial identification, these findings serve as preliminary data for subsequent microbiological and molecular analyses. Further research using biochemical tests and molecular approaches, such as 16S rRNA gene sequencing, is recommended to confirm species identity and to explore their specific roles in fermentation. Understanding the microbial composition of bekasam can provide valuable insights for optimizing fermentation conditions, improving product consistency, and ensuring safety in traditional fish-based fermented foods.