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All Journal CHEMICA Jurnal Teknik Kimia agriTECH Planta Tropika Indonesian Food and Nutrition Progress Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Agroindustrial Journal

Agung Putra Pamungkas

Departemen Teknologi Industri Pertanian, Fakultas Teknologi Pertanian, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281

Author-ID : 899708

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Social Sciences

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Articles

Analisis Mutu Pascapanen Melon (Cucumis melo L.) Kultivar Glamour Sakata Selama Penyimpanan Khairi, Amalya Nurul; Falah, Affan Fajar; Pamungkas, Agung Putra
CHEMICA: Jurnal Teknik Kimia Vol 4, No 2 (2017): Desember 2017
Publisher : Universitas Ahmad Dahlan

The aims of this study are to observe the postharvest effect of storage and traditional marketâs material handling on the quality of melon fruit Sakata cultivar. The physical qualities of melon fruit been observed were weight (measured by a scale), diameter and length (by sliding range), also fruit peel and flesh (with Zwick Type Universal Testing Machine DO-FB0.5TS). Chemical qualities of Sakata melon been observed were water content (thermogravimetric), Â°Brix sucrose (refractometer ABBE), pH (pH-meter), total carotene, total acid, and vitamin C with destructive methods.Storaging melon with traditional market method resulted in decreasing the value of physical parameters and increasing chemical parameters. Sakata melon softened during storage with fruit peel texture values was 6.45-8.07 N and fruit flesh texture was 1.4-2.06 N. The weight loss of Sakata melon was 0.06-0.25 kg, diameter dropped 0.0-0.6 cm, and length dropped 0.1- 0.5 cm during storage. Water content decreased from 92.84% to 91.19%. Sucrose content increase with values of 5.74-7.7 oBrix. Vitamin C levels showed a low and fluctuating value, 14.52-19.91 mg/100g. The melon fruit was slightly acidic with pH ranging from 6.2-6.96 and the total acid increased from 0.16 mg ek/100 g on the initial day to 0.31 mg ek/100 g on the eleventh day of storage. The total carotene content of melons ranged between 4.23-5.64 mg/100 g and indicated the flesh color of melon was getting more orange during storage.

Analisis Mutu Pascapanen Melon (Cucumis melo L.) Kultivar Glamour Sakata Selama Penyimpanan Amalya Nurul Khairi; Affan Fajar Falah; Agung Putra Pamungkas
CHEMICA: Jurnal Teknik Kimia Vol 4, No 2 (2017): Desember 2017
Publisher : Universitas Ahmad Dahlan

The aims of this study are to observe the postharvest effect of storage and traditional marketâ€™s material handling on the quality of melon fruit Sakata cultivar. The physical qualities of melon fruit been observed were weight (measured by a scale), diameter and length (by sliding range), also fruit peel and flesh (with Zwick Type Universal Testing Machine DO-FB0.5TS). Chemical qualities of Sakata melon been observed were water content (thermogravimetric), Â°Brix sucrose (refractometer ABBE), pH (pH-meter), total carotene, total acid, and vitamin C with destructive methods.Storaging melon with traditional market method resulted in decreasing the value of physical parameters and increasing chemical parameters. Sakata melon softened during storage with fruit peel texture values was 6.45-8.07 N and fruit flesh texture was 1.4-2.06 N. The weight loss of Sakata melon was 0.06-0.25 kg, diameter dropped 0.0-0.6 cm, and length dropped 0.1- 0.5 cm during storage. Water content decreased from 92.84% to 91.19%. Sucrose content increase with values of 5.74-7.7 oBrix. Vitamin C levels showed a low and fluctuating value, 14.52-19.91 mg/100g. The melon fruit was slightly acidic with pH ranging from 6.2-6.96 and the total acid increased from 0.16 mg ek/100 g on the initial day to 0.31 mg ek/100 g on the eleventh day of storage. The total carotene content of melons ranged between 4.23-5.64 mg/100 g and indicated the flesh color of melon was getting more orange during storage.

Consumer Behavior in Their Buying Decision Process of Agro-Geographical Indication Products in Yogyakarta Hildha Nurmalasari Dewi; Anggoro Cahyo Sukartiko; Agung Putra Pamungkas
Agroindustrial Journal Vol 4, No 1 (2017)
Publisher : APTA and DTIP FTP UGM

Geographical Indication (GI) defined as a designation used for products that strongly attached with their origins. The purposes of the study are: to find out consumer behavior at all buying decision stages, to see their perception of agro-geographical indication products, and to determine the most considered attributes in buying decision process of the products. Questionnaires had been distributed to 240 respondents using a purposive sampling technique to collect relevant data for achieving the research’s purposes. Population proportion and Fishbein multi-attributes model were used to analyze the obtained data. Buying decision process of agrogeographical indication products was differentiated into five stages, namely: need recognition; information gathering; alternatives evaluation; purchase decision; and post-purchase behavior. We found the importanceof product’s authenticity at the first stage of buying decision process; the internet and social media as the primary source for GI’s product information at the second stage; and product indigenousness at the third stage. At the fourth stage, most consumers bought the product in the traditional market; and the fifth stage, we found that most of them satisfied with the products, its price, and considered to purchase more in the future. Most of the consumer has a good perception of GI products. However; they had not prioritized GI products over other similar products. The quality of the GI products was the most considered factor in buying decision.

Financial Report Format Development Base on Financial Accounting Standard of Indonesia for Snake Fruit (Salaccazalacca (Gaert.) Voss.) Supply Chain Mutiara Nanda Harizca; Adi Djoko Guritno; Agung Putra Pamungkas
Agroindustrial Journal Vol 6, No 2 (2019)
Publisher : APTA and DTIP FTP UGM

Business practice of Snake Fruit in Sleman Region especially in Turi, Tempel, and Pakem District is potential due to high productivity reaching 97.61% from total production in Sleman Region. One of the problems faced along supply chain is less financial document to support decision making. This research aims to develop financial report format base on Indonesia Financial Accounting Standard adjusted to the need of each tier in snake fruit supply chain. There are three main stages in this research, they are identifying snake fruit supply chain and its financial need, developing of financial report, and measuring the acceptance of developed form in each tier. The result shows developed financial report acceptance percentage of farmer is 81.98%, middleman is 80.67%, seller is 78.24% and association is 86.43%. The acceptance then describes into highly positive acceptability

Analisis Saluran Pemasaran dan Marjin Pemasaran Beras Hitam di Kabupaten Bantul 'Afiifah Aris Putri; Dyah Ismoyowati; Agung Putra Pamungkas
agriTECH Vol 42, No 2 (2022)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Kabupaten Bantul merupakan penghasil beras hitam terbanyak di D.I. Yogyakarta. Saat ini sudah mulai masuk pesaing bisnis beras hitam dari luar D.I. Yogyakarta, sehingga pelaku bisnis beras hitam di Bantul perlu untuk meningkatkan daya saing supaya tetap dapat bertahan. Penelitian ini bertujuan untuk 1) mengidentifikasi lembaga pemasaran, 2) mengetahui pola saluran pemasaran, 3) mengetahui besarnya marjin pemasaran dan bagian petani dari pemasaran beras hitam di Kabupaten Bantul. Penelitian menggunakan metode analisis deskriptif serta perhitungan nilai marjin pemasaran dan bagian petani. Hasil penelitian menunjukkan bahwa lembaga pemasaran yang terlibat dalam saluran pemasaran beras hitam di Kabupaten Bantul ada 4, yakni petani, pengepul, distributor dan pengecer. Pola saluran pemasaran beras hitam yang ada di Kabupaten Bantul terdapat 4 pola saluran pemasaran. Besarnya marjin pemasaran dan bagian petani saluran pemasaran 1 yakni Rp0 dan 100%, saluran pemasaran 2 Rp7.371 dan 65,72%, saluran pemasaran 3 Rp9.970 dan 60,12%, dan saluran pemasaran 4 Rp17.200 dan 40,10%.

Utilization of Sugar Palm (Arenga pinnata) Dreg in Biodegradable Plastic Processing Yudi Pranoto; Budi Ariyani Hermawati; Wahyu Supartono; Agung Putra Pamungkas
Indonesian Food and Nutrition Progress Vol 19, No 2 (2022)
Publisher : Indonesian Association of Food Technologists

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ifnp.63026

Bioplastics are made from biomass sources that can be decomposed naturally in a relatively short time compared to plastics produced from synthetic polymers plastic. Sugar palm dregs are a promising source for bioplastics due to their abundance and renewability, and they do not compete with human needs. Sugar palm dregs contain enough crude fiber (41.66%) to produce strong bioplastics. Chitosan and glycerol are added to improve the performance of bioplastics. The responses observed included tensile strength, elongation at break, young modulus, thickness, biodegradability, and water vapor permeability. This study aims to determine the factors’ effect on the response parameters and find the optimal multiresponse combination to fabricate sugar palm dreg-based bioplastics. The experimental design was determined using Taguchi method, and multiresponse analysis was carried out using the Grey Relational Analysis approach. The results show that adding sugar palm dreg increased the tensile strength, Young modulus, and thickness of bioplastics but decreased the elongation at break. Adding chitosan affected the water vapor permeability, and glycerol increased the biodegradation percentage of bioplastics. The optimal combination of sugar palm dreg bioplastic was 3 grams of sugar palm dreg, 2 grams of chitosan, and 3 grams of glycerol. The combination resulted in a tensile strength of 1.46 MPa, 24.49 of elongation at break, 6.08 MPa of young modulus, 0.28 mm of thickness, 100% of biodegradation, and 0.61 g.mm/kPa.hour.m2. The results show that sugar palm dreg bioplastic is potential as future food packaging.

Prediction of Respiration Measurement Based on Temperature Differences of Fresh Strawberry (Fragaria x Ananassa var. Kelly Bright) in a Tropical Environment Rizky, Widha Mutiara; Pamungkas, Agung Putra; Falah, Mohammad Affan Fajar
PLANTA TROPIKA Vol 12, No 1 (2024)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v12i1.17855

Strawberry is a high-economic-value horticultural product that can be cultivated in tropical areas like Indonesia. Horticultural products retain their metabolism after harvest, such as respiration, which is an indicator of the degradation of products during storage. This study aimed to determine the best equation for predicting the respiration of strawberries cultivated using hydroponics in a greenhouse in Cangkringan, Yogyakarta. The respiration rate during storage was measured using an oxygen meter (DO-5510, Lutron, Taiwan) and a carbon dioxide meter (GH-2018 model, Lutron, Taiwan) in a closed system using an acrylic closed chamber. Five types of Michaelis-Menten equations were chosen as the best type based on R². The Arrhenius equation was used to get the highest value of R2 to predict the effects of temperature on respiration. Statistical analysis was used to determine the impact of treatments on the respiration rate. Based on the Arrhenius equation, the respiration of strawberries on postharvest in tropical environments depended on temperature. The best type for predicting the respiration of strawberries using the Michaelis-Menten mathematical model is competitive with an R2 value of 0.88. Therefore, the appropriate postharvest treatment is essential to add carbon dioxide or reduce oxygen levels.

Comparison of Machine Learning Models for Classifying Consumer Sentiment of Coffee Shops on Social Media X Pamungkas, Agung Putra; Mahendra, Adam; Aziz, Ibnu Wahid Fakhrudin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1905-1912

With the intense competition in the coffee shop industry, understanding consumer opinions has become crucial for businesses. This study analyzes consumer sentiment toward the Janji Jiwa and Kopi Kenangan brands using tweet data from platform X. Sentiments were classified into positive, neutral, and negative categories using three algorithms: Logistic Regression (LR), Naïve Bayes (NB), and Support Vector Machine (SVM). The performance of these algorithms, in terms of accuracy and predictive capability, was evaluated using the TF-IDF method for text representation. The evaluation results show that LR achieved the highest accuracy at 79%, followed by SVM (78%) and NB (75%). Additionally, LR recorded consistent and balanced scores across the precision, recall, and F1-score metrics. These findings indicate that LR and SVM are more effective for multiclass sentiment classification in social media contexts

Co-Authors 'Afiifah Aris Putri Adi Djoko Guritno, Adi Djoko Amalya Nurul Khairi Anggoro Cahyo Sukartiko Budi Ariyani Hermawati Dyah Ismoyowati, Dyah Hildha Nurmalasari Dewi Ibnu Wahid Fakhrudin Aziz Mahendra, Adam Mohammad Affan Fajar Falah Mutiara Nanda Harizca Rizky, Widha Mutiara Wahyu Supartono Yudi Pranoto

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