Sigit Prabawa
Universitas Sebelas Maret Surakarta, Food Technology, Department Member
White bread belongs to one of the most popular food products in the world, favoured by people for its delicacy and nutrients. Wheat flour is the main ingredient of white bread. White bread generally contains low dietary fiber. To reduce... more
White bread belongs to one of the most popular food products in the world, favoured by people for its delicacy and nutrients. Wheat flour is the main ingredient of white bread. White bread generally contains low dietary fiber. To reduce wheat flour usage, local ingredients such as local soybean can be used as an alternative to increasing the nutritional value. The addition of inulin can increase the level of dietary fiber. This research aimed to determine the chemical, physical, and sensory characteristics of white bread with soybean substitution and white sweet potatoes (Ipomea batatas L.) inulin extract addition and to determine the best formula. This research applied a Completely Randomized Design (CRD). The variations of soybean flour substitution were 0%, 20% and 24%, while the variations of white sweet potatoes inulin extract were 0%, 3% and 4%. The results showed that the treatment of substituting soy flour and adding white sweet potatoes inulin extract led to significant dif...
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Porang (Amorphophallus muelleri) is a type of tuber that has a high glucomannan content. The purpose of this study was to determine the effect of slice thickness on the quality of porang tuber chips using the Green House Effect (GHE)... more
Porang (Amorphophallus muelleri) is a type of tuber that has a high glucomannan content. The purpose of this study was to determine the effect of slice thickness on the quality of porang tuber chips using the Green House Effect (GHE) method by pretreatment with 0.15% sodium metabisulfite solution immersion. The slice thickness treatment was carried out at three levels, including 4 mm, 6 mm, and 8 mm, while the drying treatment was carried out with two types, which are the GHE drying method and the conventional drying method using sunlight. The results of the research on porang chips on brightness, moisture content, glucomannan content, ash content, and calcium oxalate content showed that the thickness of the slices had an effect on the quality of the chips. The thicker the slices of the porang chips, the darker the color of the porang chips. The thicker the slices of the porang chips, the higher the water content of the chips. The amount of glucomannan (%) in porang chips goes down ...
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Vegetables are classified as food ingredients that are easily wilted and easily damaged so that vegetables that have been harvested must be marketed and consumed immediately. At room temperature, the freshness of leaf vegetables can only... more
Vegetables are classified as food ingredients that are easily wilted and easily damaged so that vegetables that have been harvested must be marketed and consumed immediately. At room temperature, the freshness of leaf vegetables can only last for 12 hours. For this reason, proper postharvest handling is needed to maintain quality and extend the shelf life of these commodities, including ozone technology (ozonization). Ozone is able to shed pesticide and bacterial contamination as well as heavy metals attached to the surface of fruit or vegetables, making it safe for consumption for health. Vegetable cultivation by productive communities as micro-entrepreneurs has developed quite a lot. The problem that still occurs is the lack of efforts to extend the shelf life of vegetables that can increase consumer preferences for spinach. The “Mutiara Organik” Farmer Group in Sumberejo Village, Ngablak District, Magelang Regency made these efforts by cultivating vegetables and applying ozonatio...
Biogas technology is easy to be implemented and has a lot of raw materials available in various forms such as livestock waste, agricultural waste, industrial waste and the like which has high organic matter. This study aimed to determine... more
Biogas technology is easy to be implemented and has a lot of raw materials available in various forms such as livestock waste, agricultural waste, industrial waste and the like which has high organic matter. This study aimed to determine the biogas production, biogas yield, hydraulic retention time, and the quality of biogas made from cassava and cassava leaves with cow dung as a starter. The experiments were performed using a completely randomized design (CRD) with four treatments and four repetitions. Substrate composition of cassava leaves, cassava tubers, and cow dung is A (15: 0: 85), B (0:15:85), C (0:25:75), and D (0:35:65). Variance analysis performed using SAS statistical program. The results showed that the composition of the substrate significantly affect the total production of biogas, but did not significantly affect the productivity of biogas. The highest production of biogas obtained from C treatment amounting to 6,995 ml. The average yield of biogas is 130.85 mL/g TV...
Rice is the staple food for the people of Kalimantan Selatan, Indonesia. The inability of the government to meet the needs of rice will lead to regional and national instability. Fortunately, the Government of Kalimantan Selatan has... more
Rice is the staple food for the people of Kalimantan Selatan, Indonesia. The inability of the government to meet the needs of rice will lead to regional and national instability. Fortunately, the Government of Kalimantan Selatan has stated through statistical data that the production of rice in Kalimantan Selatan has surplus. Therefore, Kalimantan Selatan serve as one of the national food barn area. An interesting point is Kalimantan Selatan which has a wetlands as a majority of paddy field capable to achieve surplus production in rice, where the wetlands can only be planted with rice once a year. This study aims to provide an alternative policies to maintain a surplus in rice production through policy analysis approach based on system dynamics model. The resullt of the simulation that Kalimantan Selatan will capable to maintain their rice production in surplus condition if the Government can push the paddy field conversion and endorse the production insentives for the farmers. In 2...
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White sweet potato (Ipomoea batatas L.) is one of the tubers that have the potential to produce inulin and largely abundant in Indonesia. Several factors can affect the physical and chemical characteristics of inulin including the... more
White sweet potato (Ipomoea batatas L.) is one of the tubers that have the potential to produce inulin and largely abundant in Indonesia. Several factors can affect the physical and chemical characteristics of inulin including the preliminary treatment and the drying method. The purpose of this study was to determine the effect of blanching and foam mat drying method on the physical and chemical characteristics of white sweet potato inulin. The physical and chemical characteristics evaluated include solubility, total sugar, sugar reductions, discussed inulin and inulin molecular weight. The experimental design in this study used a Completely Randomized Design (CRD) with two factors, namely blanching and differences in egg white composition (2%; 6%; and 10%). The data were processed statistically using One-Way ANOVA with a significance level of 5%. The results showed that blanching and foam mat drying can affect the yield, solubility, water absorption, moisture content, and molecular...
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Surakarta City is one of the cities in Central Java which is vulnerable to food insecurity events, especially transient food insecurity. This is because the city of Surakarta is a disaster-prone area from flooding, strong winds and... more
Surakarta City is one of the cities in Central Java which is vulnerable to food insecurity events, especially transient food insecurity. This is because the city of Surakarta is a disaster-prone area from flooding, strong winds and landslides. This will have an impact on nutrition and food access for the people of Surakarta City when a disaster occurs. The role of the SKPG is very important in providing information for the Surakarta City government regarding the condition of food and nutrition, so that the response to food insecurity can be right on target. The SKPG is compiled by collecting data according to categories, which are then processed for policy making from the Surakarta City government. The quality of public food consumption in Surakarta City, Central Java is still far from ideal. This is indicated by the score of the Expected Food Pattern (PPH) which was still in the range of 80.8% in 2016 which was even lower than 2014 which reached 90.3%. However, in 2019 PPH for Sura...
The objective of the research was to build the simulation model of hand tractor requirement for soil tillage paddy field. The use of hand tractor for soil tillage at paddy field instructed to support the concept of agricultural... more
The objective of the research was to build the simulation model of hand tractor requirement for soil tillage paddy field. The use of hand tractor for soil tillage at paddy field instructed to support the concept of agricultural mechanization se lective. The difficulty to fulfill requirement of labour for soil tillage had to be anticipated. The simulation model of hand tractor requirement for soil tillage of paddy field needed as one of effort reach the improvement farm operations based on agricultural mechanization selective. Model run to use the software of Powersim. The requirement of hand tractor adapted by growth of labour for soil tillage, animal for soil tillage, area for paddy field, and time which available to soil tillage. More model development detailed and complex is needed to get the more result representative and precisely. ABSTRAK Tujuan dari penelitian ini adalah membuat model simulasi untuk menduga kebutuhan traktor tangan pada pengolahan tanah padi sawah. Penggunaa...
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The objective of the research was to analyze noise and vibration of hand tractor. Noise was measured with digital sound level meter, while vibration was measured with portable vibration meter. The result showed that the noise level of... more
The objective of the research was to analyze noise and vibration of hand tractor. Noise was measured with digital sound level meter, while vibration was measured with portable vibration meter. The result showed that the noise level of hand tractor Perkasa 700 GX which was 88 – 99 dB (A) exceeded the critical tolerance level of 85 dB (A), while the vibration level of 2.10 Hz with acceleration of 24.20 m/sec2exceeded the critical tolerance level of 2.10 Hz with acceleration of 10.00 m/sec2. To reduce noise and vibration, it is suggested to improve construction of the hand tractor by improving engine design especially the muffler, installing a spring ring on each bolt, mounting shock breakers, as well as using an engine. It is also recommended to use ear protectors. ABSTRAK Tujuan dari penelitian ini adalah menganalisa kebisingan dan getaran mekanis pada traktor tangan. Kebisingan diu- kur dengan sound level meter tipe digital. Getaran mekanis diukur dengan portable vibration meter. ...
The purpose of this research was to study the effect of power intensity and reaction time on the yield and the characteristic using an erlenmeyer glass heated in a microwave oven with power capacity of 399 watt and frequency of 2,450... more
The purpose of this research was to study the effect of power intensity and reaction time on the yield and the characteristic using an erlenmeyer glass heated in a microwave oven with power capacity of 399 watt and frequency of 2,450 arrangements was used in this experiment. Treatment consisted of two factors, namely power intensity and reaction time. The power intensity included three levels (30, 50, and 70%). Similarly did for the reaction time (30, 60, and 120 cooking oil to methanol). Parameters to be analyzed included biodiesel yield, acid number, density, and viscosity of = 1%. The results showed that both microwave power intensity and reaction time and their interaction had no effect on the viscosity, acid number and density of produced biodiesel. Biodiesel produced has acid number of 2.98 to 4.20 mgKOH/g, density of 0.87 to 0.88 g/mL, and viscosity of 1.9 to 2 cSt. Microwave power intensity and reaction time andtime of 30 seconds was adequate for microwave-assisted biodiesel...
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... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ... alat dan mesin budidaya tebu terhadap tingkat kebutuhan teknologi, ketersedian suku cadang, kesesuaian topografi, kesesuaian ukuran lahan,... more
... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ... alat dan mesin budidaya tebu terhadap tingkat kebutuhan teknologi, ketersedian suku cadang, kesesuaian topografi, kesesuaian ukuran lahan, kesesuaian jenis tanah ...
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... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ... alat dan mesin budidaya tebu terhadap tingkat kebutuhan teknologi, ketersedian suku cadang, kesesuaian topografi, kesesuaian ukuran lahan,... more
... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ... alat dan mesin budidaya tebu terhadap tingkat kebutuhan teknologi, ketersedian suku cadang, kesesuaian topografi, kesesuaian ukuran lahan, kesesuaian jenis tanah ...
Pada umumnya kegiatan pemupukan tidak memperhatikan keragaman spasial kesuburan tanah yang ada. Pemupukan yang tidak tepat dapat mengakibatkan aplikasi yang berlebihan (over-application) atau aplikasi yang kurang (under-application). Hal... more
Pada umumnya kegiatan pemupukan tidak memperhatikan keragaman spasial kesuburan tanah yang ada. Pemupukan yang tidak tepat dapat mengakibatkan aplikasi yang berlebihan (over-application) atau aplikasi yang kurang (under-application). Hal ini dapat ...
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Biogas technology is easy to be implemented and has a lot of raw materials available in various forms such aslivestock waste, agricultural waste, industrial waste and the like which has high organic matter. This study aimedto determine... more
Biogas technology is easy to be implemented and has a lot of raw materials available in various forms such aslivestock waste, agricultural waste, industrial waste and the like which has high organic matter. This study aimedto determine the biogas production, biogas yield, hydraulic retention time, and the quality of biogas made fromcassava and cassava leaves with cow dung as a starter. The experiments were performed using a completelyrandomized design (CRD) with four treatments and four repetitions. Substrate composition of cassava leaves,cassava tubers, and cow dung is A (15: 0: 85), B (0:15:85), C (0:25:75), and D (0:35:65). Variance analysisperformed using SAS statistical program. The results showed that the composition of the substrate significantlyaffect the total production of biogas, but did not significantly affect the productivity of biogas. The highestproduction of biogas obtained from C treatment amounting to 6,995 ml. The average yield of biogas is 130.85mL/g TVS. Biogas...
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ABSTRAK Pada umumnya kegiatan pemupukan tidak memperhatikan keragaman spasial kesuburan tanah yang ada. Hal ini dapat menyebabkan pemborosan pupuk, penurunan produktivitas, peningkatan biaya produksi, penurunan keuntungan, dan dampak... more
ABSTRAK Pada umumnya kegiatan pemupukan tidak memperhatikan keragaman spasial kesuburan tanah yang ada. Hal ini dapat menyebabkan pemborosan pupuk, penurunan produktivitas, peningkatan biaya produksi, penurunan keuntungan, dan dampak negatif pada lingkungan. Masalah tersebut dapat diatasi dengan pendekatan precision farming. Penelitianpenelitian tentang precision farming, termasuk dalam hal pemupukan, sudah banyak dilakukan dengan menggunakan beberapa tool seperti geostatistika, artificial neural network, sistem informasi geografis, dan sistem pendukung keputusan. Namun demikian penelitian yang ada masing-masing hanya menggunakan satu tool atau gabungan di antara tool tersebut. Penelitian ini dilakukan dengan menggabungkan keempat tool tersebut. Penelitian ini mempunyai tujuan: a) menganalisa keragaman spasial kandungan hara N, P, dan K di dalam petak lahan tebu; b) menganalisa keragaman spasial produktivitas di dalam petak lahan tebu; c) menentukan kebutuhan jumlah hara N, P, dan K...
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Data historis dosis pemupukan pada budidaya tebu dan hasil yang diperoleh (hasil tebu dan kadar gula) sangat bermanfaat untuk mengetahui dosis pemupukan yang memberikan hasil yang tinggi. Hubungan tersebut dapat diformulasikan dengan... more
Data historis dosis pemupukan pada budidaya tebu dan hasil yang diperoleh (hasil tebu dan kadar gula) sangat bermanfaat untuk mengetahui dosis pemupukan yang memberikan hasil yang tinggi. Hubungan tersebut dapat diformulasikan dengan artificial neural network . Penelitian ini bertujuan membangun model artificial neural network sehingga dapat ditentukan kebutuhan jumlah hara N, P, dan K pada target hasil tebu ( yield ) dan kadar gula yang diharapkan. Hasil penelitian menunjukkan bahwa model Artificial Neural Network ( ANN ) yang dibangun untuk memformulasikan hubungan antara jumlah hara yang dibutuhkan dengan hasil tebu dan kadar gula memiliki akurasi R 2 =0.93 untuk pupuk pertama N, R 2 =0.88 untuk pupuk pertama P, R 2 =0.88 untuk pupuk kedua N, dan R 2 =0.92 untuk pupuk kedua K. Kata kunci: dosis pupuk, hasil tebu, kadar gula, artificial neural network.
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Putat village, Patuk district, Gunung Kidul regency is one of cocoa production center in Yogjakarta. Cocoa bean products in this region have been marketed not only in Yogjakarta but also several areas in Indonesia. In order to support... more
Putat village, Patuk district, Gunung Kidul regency is one of cocoa production center in Yogjakarta. Cocoa bean products in this region have been marketed not only in Yogjakarta but also several areas in Indonesia. In order to support production continuity of cocoa bean productions, to date the farmers face obtacles in cacao plantation maintenance and cocoa beans drying. Thus, this activity aimed to increase quality and quantity of cocoa beans through maintenance intensifications of cacao and introduction of cacao cultivation equipments and cocoa beans drying hybrid system. Partner in this activities were Kelompok Tani Kakao Sido Dadi and cocoa dan chocolate production industry “Joglo Coklat” located in Patuk, Gunung Kidul, Yogjakarta. The activities were conducted in several stages including 1) basic data collection, 2) socialization of cacao plantation maintenance, 3) socialization of cocoa beans drying, 4) introduction of cultivation equipments, 5) contruction of drying chamber, ...
Beluntas (Pluchea indica L.) leaf is a plant that has high antioxidant compounds, and mint (Mentha piperita L.) leaf contain mentol compounds which can improve the taste of herbal drinks. In the processing, the drying process can affect... more
Beluntas (Pluchea indica L.) leaf is a plant that has high antioxidant compounds, and mint (Mentha piperita L.) leaf contain mentol compounds which can improve the taste of herbal drinks. In the processing, the drying process can affect the functional content of beluntas leaves and mint leaves. This study aims to determine the effect of drying time and the formulation of beluntas leaves and mint leaves on physical (colour), chemical (moisture content, total phenol, and antioxidant activity), and sensory (colour, smell, taste, and overall) properties and to determine the combination of drying time and the formulation of beluntas and mint leaves that provide the best herbal drink. The experimental design carried out in this study used a Completely Randomized Design (CRD) with a combined factor, drying time and formulation of beluntas and mint leaves. The time variation used is 1.5 hours; 2 hours and 2.5 hours. Various formulations of beluntas leaves and mint leaves used were 1:1, 2:1,...
Ayam broiler (Gallus domesticus) merupakan jenis ternak yang banyak dikembangkan sebagai sumber pemenuhan kebutuhan protein hewani. Namun, karena merupakan bahan segar dan memiliki kandungan air yang tinggi, daging ayam broiler rentan... more
Ayam broiler (Gallus domesticus) merupakan jenis ternak yang banyak dikembangkan sebagai sumber pemenuhan kebutuhan protein hewani. Namun, karena merupakan bahan segar dan memiliki kandungan air yang tinggi, daging ayam broiler rentan terhadap kebusukan yang disebabkan oleh mikroba. Perlakuan dengan ozon dan suhu penyimpanan mampu mempertahankan kualitas daging ayam ditinjau dari kualitas fisika, kimia, dan sensoris. Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan ozonisasi dan suhu penyimpanan terhadap sifat fisika, kimia, dan sensoris daging ayam broiler. Variasi waktu perendaman, yaitu 5, 10, dan 15 menit, sedangkan untuk variasi penyimpanan yaitu 10°C dan -6°C. Penelitian ini dilakukan menggunakan Rancangan Acak Lengkap Faktorial (RALF) dan analisis lanjutan menggunakan DMRT. Hasil yang didapatkan adalah perlakuan ozon dan suhu beku efektif dalam mengurangi nilai drip loss namun meningkatkan susut masak, menurunkan atribut warna, mengurangi nilai aw, mempertahankan ...
Diversification of food products, one of which can be applied to snacks. One type of snack that is quite successful in the market is the chips. To improve the value of the nutritive value of these chips is by making simulation chips.... more
Diversification of food products, one of which can be applied to snacks. One type of snack that is quite successful in the market is the chips. To improve the value of the nutritive value of these chips is by making simulation chips. Based on the protein content of milkfish and mung beans are high then used as raw material for the manufacture of simulated chips. This study aims to determine the best simulation of milkfish and mung bean flour based on characteristics of chemical, physical, and sensory. Experimental design using in this research was Completely Randomized Design (CRD) with one factor, which was ratio variation of milkfish and mung bean flour. Based on the results of chemical, physical, and sensory analyzes obtained were analyzed statistically by using one way ANOVA method; if there was a difference, it was followed with a significance test using Duncan’s Multiple Range Test (DMRT) at a significance level of α = 0,05. Based on the results of the study showed the best fo...
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Chips is one of the most popular snack foods in the community. Chips still have some drawbacks in terms of uniformity of size and made from one type of raw material only, so it has not been able to increase the nutritional value. Protein... more
Chips is one of the most popular snack foods in the community. Chips still have some drawbacks in terms of uniformity of size and made from one type of raw material only, so it has not been able to increase the nutritional value. Protein is needed for growth especially in children. It needs diversification of food products to meet protein needs for children. Based on high protein content of milkfish and kidney bean flour then used as raw material in making simulation chips. This research use Completely Randomized Design (CRD) with one factor that is variation of milkfish and kidney bean flour formulation. The data were analyzed by One Way Anova with 95% significance level. The results of research showed the best formulation on F2 (35% milkfish meat : 65% kidney bean flour). The result of chemical analysis on F2 is moisture 3,44 %wb, ash 3,84 %db, fat 23,22 %db, protein 23,01 %db, carbohydrate 51,01 %db, FFA 0,39 %db, total calories 5,30 kcal/g and crude fiber 4,40 %db. While physica...
South Kalimantan is a largest rice producer in Kalimantan island. More than five years its rice met by their own production, moreover it has supplied to other area such as Kalimantan Tengah, Kalimantan Timur and Kalimantan Utara. In many... more
South Kalimantan is a largest rice producer in Kalimantan island. More than five years its rice met by their own production, moreover it has supplied to other area such as Kalimantan Tengah, Kalimantan Timur and Kalimantan Utara. In many studies, rice stocks play a critical role in determining the regional’s food security. In recent issues, rice stocks has a wide impact on an array of economic, political, societal stabilities. Unfortunately, most of the land in Kalimantan Selatan is classified as wetlands, where the land productivity is low. Therefore, this study analyzes rice supply patterns in Kalimantan Selatan in order to provide policies development toward rice self-sufficiency. This research is using system dynamics approach to explore the system which then develop any alternatives of rice policies. Eventually, this study provides evidences for the need to consider rice supply system in the regional’s food security policies.
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Permasalahan utama produk olahan pangan basah adalah umur simpan yang pendek sehingga tidak mampu menjangkau pasar yang jauh. Akibatnya pendapatan yang dihasilkan terbatas karena terbatasnya pemasaran. Untuk mengatasi hal tersebut... more
Permasalahan utama produk olahan pangan basah adalah umur simpan yang pendek sehingga tidak mampu menjangkau pasar yang jauh. Akibatnya pendapatan yang dihasilkan terbatas karena terbatasnya pemasaran. Untuk mengatasi hal tersebut dikembangkan olahan getuk keju frozen yang dikembangkan dari getuk keju panggang produksi UMKM (Usaha Mikro Kecil dan Menengah) “Omah Ubi Mama Una” di Mojolaban Sukoharjo Jawa Tengah. Dalam pengabdian kepada masyarakat ini telah dilakukan pelatihan cara produksi pangan olahan yang baik, pendampingan produksi dan pengemasan, dan perijinan oleh tim pengabdian pada masyarakat Universitas Sebelas Maret (UNS) sehingga dihasilkan teknologi tepat guna pengolahan singkong menjadi getuk keju frozen yang mampu disimpan dalam waktu lebih lama selama dalam pembekuan dan mampu melayani konsumen untuk pasar yang jauh.
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Diversification of food products one of which can be applied to snacks.. One type of snack that is quitesuccessful in the market is the chips. To improve the value of the nutritive value of these chips is by makingsimulation chips. Based... more
Diversification of food products one of which can be applied to snacks.. One type of snack that is quitesuccessful in the market is the chips. To improve the value of the nutritive value of these chips is by makingsimulation chips. Based on protein content of milkfish and mung beans are high then used as raw material forthe manufacture of simulated chips.This study aims to determine the best simulation of milkfish and mung beansflour based on characteristics of chemical, physical, and sensory. Experimental design using in this researchwas Completely Randomized Design (CRD) with one factor, that was ratio variation of milkfish and mung beanflour. Based on the results of chemical, physical, and sensory analyzes obtained were analyzed statistically byusing one way ANOVA method, if there was a difference, it was followed with significance test using Duncan’sMultiple Range Test (DMRT) at significance level of α = 0,05.Based on the results of the study showed the best formulation results ...
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Marshmallow belongs to a high-calorie food that requires a low-calorie substitute for sucrose, one of which is sorbitol. Marshmallow has the potential to become a functional food with the addition of inulin contained within white sweet... more
Marshmallow belongs to a high-calorie food that requires a low-calorie substitute for sucrose, one of which is sorbitol. Marshmallow has the potential to become a functional food with the addition of inulin contained within white sweet potatoes. Inulin refers to a type of fructan carbohydrate which contains fiber and has the potential as a prebiotic that is beneficial for the human’s body. This study aims to determine the effect of the addition of white sweet potato (Ipomea batatas L.) inulin extract and sorbitol on the physical, chemical and organoleptic characteristic of marshmallows and to obtain the best marshmallow’s formula through white sweet potato (Ipomea batatas L.) inulin extract and sorbitol addition. The completely randomized design method (CRD) applied in this study consisted of one factor, namely the difference in formulation between the concentration of white sweet potato inulin extract (2% and 3%) and the concentration of sorbitol (25%, 50%, and 75%). The statistica...