Effect of temperature and foam mat drying method on the physical and chemical properties of white... more Effect of temperature and foam mat drying method on the physical and chemical properties of white sweet potato (Ipomoea batatas L.
White bread belongs to one of the most popular food products in the world, favoured by people for... 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...
Porang (Amorphophallus muelleri) is a type of tuber that has a high glucomannan content. The purp... 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 ...
Sugar has a role in the intrinsic properties of the product and gives a satiety effect after cons... more Sugar has a role in the intrinsic properties of the product and gives a satiety effect after consumption. Nevertheless, its adverse effect on the human body becomes an essential reason to reduce the sugar content including in ready-to-drink (RTD) cocoa beverages. Besides the sugar, the properties of the beverages are also affected by the stabilizers. The development of reducedsugar RTD cocoa beverages was studied in two steps. Initially, the stabilizers comprising kappa-carrageenan (κ-carrageenan) and carboxymethyl cellulose (CMC) were optimized in the full-sugar RTD cocoa beverage by which the concentrations of the stabilizers could stabilize cocoa particles and the beverage met its prominent characteristics regarding the sensorial properties also physical properties (sedimentation, rheology, and color). The CMC and κ-carrageenan respectively varied into formulas, which were F0(0%;
Vegetables are classified as food ingredients that are easily wilted and easily damaged so that v... 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...
PROSIDING SEMINAR NASIONAL LINGKUNGAN LAHAN BASAH, Apr 1, 2020
Kalimantan Selatan has practiced rice surplus and specified as a national rice barn. This paper s... more Kalimantan Selatan has practiced rice surplus and specified as a national rice barn. This paper shows how the production of rice in Kalimantan Selatan delivered well. Even though most of the land in Kalimantan Selatan classified as wetlands, which low rate of productivity, Kalimantan Selatan proved capable of maintaining their surplus. The exploratory approach has used in this study. Any alternative scenarios are developed to support Kalimantan Selatan to preserve rice production. System dynamics has used to simulate each scenario and model behavior. Further radical model development is needed, such as consideration of the multi-cultural and economics approaches to enhance food diversification in enacting sustainability of staple food availability.
Biogas technology is easy to be implemented and has a lot of raw materials available in various f... 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 gov... 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...
White sweet potato (Ipomoea batatas L.) is one of the tubers that have the potential to produce i... 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...
Surakarta City is one of the cities in Central Java which is vulnerable to food insecurity events... 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 s... 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...
The objective of the research was to analyze noise and vibration of hand tractor. Noise was meas... 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 ... 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...
... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ..... 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 ...
... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ..... 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 ...
Effect of temperature and foam mat drying method on the physical and chemical properties of white... more Effect of temperature and foam mat drying method on the physical and chemical properties of white sweet potato (Ipomoea batatas L.
White bread belongs to one of the most popular food products in the world, favoured by people for... 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...
Porang (Amorphophallus muelleri) is a type of tuber that has a high glucomannan content. The purp... 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 ...
Sugar has a role in the intrinsic properties of the product and gives a satiety effect after cons... more Sugar has a role in the intrinsic properties of the product and gives a satiety effect after consumption. Nevertheless, its adverse effect on the human body becomes an essential reason to reduce the sugar content including in ready-to-drink (RTD) cocoa beverages. Besides the sugar, the properties of the beverages are also affected by the stabilizers. The development of reducedsugar RTD cocoa beverages was studied in two steps. Initially, the stabilizers comprising kappa-carrageenan (κ-carrageenan) and carboxymethyl cellulose (CMC) were optimized in the full-sugar RTD cocoa beverage by which the concentrations of the stabilizers could stabilize cocoa particles and the beverage met its prominent characteristics regarding the sensorial properties also physical properties (sedimentation, rheology, and color). The CMC and κ-carrageenan respectively varied into formulas, which were F0(0%;
Vegetables are classified as food ingredients that are easily wilted and easily damaged so that v... 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...
PROSIDING SEMINAR NASIONAL LINGKUNGAN LAHAN BASAH, Apr 1, 2020
Kalimantan Selatan has practiced rice surplus and specified as a national rice barn. This paper s... more Kalimantan Selatan has practiced rice surplus and specified as a national rice barn. This paper shows how the production of rice in Kalimantan Selatan delivered well. Even though most of the land in Kalimantan Selatan classified as wetlands, which low rate of productivity, Kalimantan Selatan proved capable of maintaining their surplus. The exploratory approach has used in this study. Any alternative scenarios are developed to support Kalimantan Selatan to preserve rice production. System dynamics has used to simulate each scenario and model behavior. Further radical model development is needed, such as consideration of the multi-cultural and economics approaches to enhance food diversification in enacting sustainability of staple food availability.
Biogas technology is easy to be implemented and has a lot of raw materials available in various f... 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 gov... 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...
White sweet potato (Ipomoea batatas L.) is one of the tubers that have the potential to produce i... 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...
Surakarta City is one of the cities in Central Java which is vulnerable to food insecurity events... 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 s... 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...
The objective of the research was to analyze noise and vibration of hand tractor. Noise was meas... 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 ... 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...
... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ..... 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 ...
... Dalam budidaya tebu lahan kering pada umumnya diusahakan adanya tanaman keprasan (ratoon). ..... 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 ...
Uploads
Papers by Sigit Prabawa