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INDONESIA
Jurnal Bahan Alam Terbarukan
Published by Universitas Negeri Semarang
ISSN : 23030623     EISSN : 24072370     DOI : -
Core Subject : Science,
Materials Science & Nanotechnology
This journal presents articles and information on research, development and applications in biomass conversion processes (thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion) and equipment to produce fuels, power, heat, and value-added chemicals from biomass. A biorefinery takes advantage of the various components in biomass and their intermediates therefore maximizing the value derived from the biomass feedstock. A biorefinery could, for example, produce one or several low-volume, but high-value, chemical or nutraceutical products and a low-value, but high-volume liquid transportation fuel such as biodiesel or bioethanol (see also alcohol fuel). The high-value products increase profitability, the high-volume fuel helps meet energy needs, and the power production helps to lower energy costs and reduce greenhouse gas emissions from traditional power plant facilities. Future biorefineries may play a major role in producing chemicals and materials that are traditionally produced from petroleum.
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol 2, No 1 (2013): June 2013" : 12 Documents clear
PEWARNA ALAMI BATIK DARI TANAMAN NILA (Indigofera) DENGAN KATALIS ASAM Astuti Handayani, Prima; Amar Mualimin, A.
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2909

Abstract

Indigo is a natural blue dye substance of batik extracted from the leaves of indigo plant, which is eco-friendly and non-carcinogenic. To be able to extract an indigo dye substance, the indican glycosides contained in the leaves of the plant is first hydrolyzed into Indigo indoxyl and glucose by using either the dilute mineral acids or enzymes. The indoxyl is then oxidized to indigo. In this experiment, the extraction of the blue dye substance of indigo plant was carried out by method of acidifying. The observations made on the variation of the concentration of hydrochloric acid, the aeration time, the acids, and the type of binding substances. The material used in the experiment included the 2 months old of Indigo leaves, hydrochloric acid, sulfuric acid, sodium hydroxide, sugar, lime, alum and tunjung (Ferrous sulfate). The equipments used in the aeration were beaker glass and the air pump.The process was initiated by soaking the indigo leaves in acid with a specific concentration for 24 hours. The filtrate was then oxidized by flowing the air using the air pump for 12 hours. Then, the sample was applied by immersing the fabric in a solution of the binding substances consisted of Ferrous sulfate, alum, and lime. The experiment results show that higher concentration of indigo was obtained from the longer aeration time. By comparing different type of acids, the extraction using 0.01 M H2SO4 shows better than using HCl in the same concentration. The highest indigo concentration produced by the extraction using 0.01 M H2SO4 was 29.20 ppm, while the highest concentration produced from the extraction using 0.01 M HCl was 26.88 ppm. The use of different type of binding substances on the fabric, giving the appearance of different colors. The binding substance of Tunjung produces the dark blue color, lime produces greenish blue colour, and alum produces a blue color.
LAJU PELEPASAN DIAZINON DARI MIKROKAPSUL BERBASIS MELAMIN FORMALDEHID Suhartaya, Noviana Utami Ciptaningtyas; Mulyono, Panut; -, Rochmadi
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2910

Abstract

The microcapsules containing diazinon as the core material and melamine formaldehyde as the membrane material have been synthesized by in situ polimerization method. The microcapsule membrane on this researches was modified in two types, the first, melamine formaldehyde (MF) and the second types, melamine formaldehyde added with sodium dodecyl sulphate and polyvinyl alcohol (MF-SDSPVA). This research aims to study the effect of pH and temperature on the release rate of diazinon in aqueous medium. The results showed that the pH and temperature has little effect on the release rate of diazinon from microcapsule based on melamine formaldehyde. This is due to the diffusion through the microcapsule membrane is not influenced by the pH and temperature of the solution outside of microcapsule.
ASPEK PERTIMBANGAN DALAM SIMULASI FERMENTASI FASE GAS BERBASIS CFD Triwibowo, Bayu
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2911

Abstract

In the midst of restrictions issue on the use of fossil fuels, the world began to move towards the use of renewable fuels. One such fuel is hydrogen. Hydrogen itself could synthesized from fermentation method. Complex phenomenon will be difficult to be analyzed simultaneously and comprehensively when using conventional techniques. Optimation would be important since yield hydrogen from fermentation method was very small. Cause of few obstacles such as comprehensive phenomenon data not exsted mades this process very difficult to optimize. Simulation of hydrogen fermentation based on CFD would be one of the solution to retrieve phenomenon data comprehensively
PENGARUH JENIS AIR PERENDAM TERHADAP KANDUNGAN VITAMIN C, SERAT, DAN PROTEIN TEPUNG MANGGA (Mangifera Indica L.) Paramita, Octavianti
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2912

Abstract

Mango is a tropical and sub-tropical fruit known throughout the world because it tastes good and fresh. However the freshness of mangoes can not stand for too long so it is necessary to have a good post-harvest handling and management. Mango processing will increase the economic value of agricultural production. One of the method to maintain function and quality in the mango processing, mango can be processed into other form such as mango flour. In the processing of mango powder still can be found the low level of nutrients such as vitamin C, fiber and protein, which caused by the occuring of change in raw material during the drying process. To prevent such change, an arrangement of a soaking method should be made. This study aims to determine the effect of water on the process of making mango powder on the content of vitamin C, fiber and protein. From the research results, it can be concluded that the relatively good conditions for the process of making mango powders done by using cold water (0 oC) as a soaking water. Soaking water influenced the content of vitamin C, fiber and protein.
LAJU PELEPASAN DIAZINON DARI MIKROKAPSUL BERBASIS MELAMIN FORMALDEHID Suhartaya, Noviana Utami Ciptaningtyas; Mulyono, Panut; -, Rochmadi
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2910

Abstract

The microcapsules containing diazinon as the core material and melamine formaldehyde as the membrane material have been synthesized by in situ polimerization method. The microcapsule membrane on this researches was modified in two types, the first, melamine formaldehyde (MF) and the second types, melamine formaldehyde added with sodium dodecyl sulphate and polyvinyl alcohol (MF-SDSPVA). This research aims to study the effect of pH and temperature on the release rate of diazinon in aqueous medium. The results showed that the pH and temperature has little effect on the release rate of diazinon from microcapsule based on melamine formaldehyde. This is due to the diffusion through the microcapsule membrane is not influenced by the pH and temperature of the solution outside of microcapsule.
ASPEK PERTIMBANGAN DALAM SIMULASI FERMENTASI FASE GAS BERBASIS CFD Triwibowo, Bayu
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2911

Abstract

In the midst of restrictions issue on the use of fossil fuels, the world began to move towards the use of renewable fuels. One such fuel is hydrogen. Hydrogen itself could synthesized from fermentation method. Complex phenomenon will be difficult to be analyzed simultaneously and comprehensively when using conventional techniques. Optimation would be important since yield hydrogen from fermentation method was very small. Cause of few obstacles such as comprehensive phenomenon data not exsted mades this process very difficult to optimize. Simulation of hydrogen fermentation based on CFD would be one of the solution to retrieve phenomenon data comprehensively
PENGARUH JENIS AIR PERENDAM TERHADAP KANDUNGAN VITAMIN C, SERAT, DAN PROTEIN TEPUNG MANGGA (Mangifera Indica L.) Paramita, Octavianti
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2912

Abstract

Mango is a tropical and sub-tropical fruit known throughout the world because it tastes good and fresh. However the freshness of mangoes can not stand for too long so it is necessary to have a good post-harvest handling and management. Mango processing will increase the economic value of agricultural production. One of the method to maintain function and quality in the mango processing, mango can be processed into other form such as mango flour. In the processing of mango powder still can be found the low level of nutrients such as vitamin C, fiber and protein, which caused by the occuring of change in raw material during the drying process. To prevent such change, an arrangement of a soaking method should be made. This study aims to determine the effect of water on the process of making mango powder on the content of vitamin C, fiber and protein. From the research results, it can be concluded that the relatively good conditions for the process of making mango powders done by using cold water (0 oC) as a soaking water. Soaking water influenced the content of vitamin C, fiber and protein.
PEWARNA ALAMI BATIK DARI TANAMAN NILA (Indigofera) DENGAN KATALIS ASAM Astuti Handayani, Prima; Amar Mualimin, A.
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2909

Abstract

Indigo is a natural blue dye substance of batik extracted from the leaves of indigo plant, which is eco-friendly and non-carcinogenic. To be able to extract an indigo dye substance, the indican glycosides contained in the leaves of the plant is first hydrolyzed into Indigo indoxyl and glucose by using either the dilute mineral acids or enzymes. The indoxyl is then oxidized to indigo. In this experiment, the extraction of the blue dye substance of indigo plant was carried out by method of acidifying. The observations made on the variation of the concentration of hydrochloric acid, the aeration time, the acids, and the type of binding substances. The material used in the experiment included the 2 months old of Indigo leaves, hydrochloric acid, sulfuric acid, sodium hydroxide, sugar, lime, alum and tunjung (Ferrous sulfate). The equipments used in the aeration were beaker glass and the air pump.The process was initiated by soaking the indigo leaves in acid with a specific concentration for 24 hours. The filtrate was then oxidized by flowing the air using the air pump for 12 hours. Then, the sample was applied by immersing the fabric in a solution of the binding substances consisted of Ferrous sulfate, alum, and lime. The experiment results show that higher concentration of indigo was obtained from the longer aeration time. By comparing different type of acids, the extraction using 0.01 M H2SO4 shows better than using HCl in the same concentration. The highest indigo concentration produced by the extraction using 0.01 M H2SO4 was 29.20 ppm, while the highest concentration produced from the extraction using 0.01 M HCl was 26.88 ppm. The use of different type of binding substances on the fabric, giving the appearance of different colors. The binding substance of Tunjung produces the dark blue color, lime produces greenish blue colour, and alum produces a blue color.
LAJU PELEPASAN DIAZINON DARI MIKROKAPSUL BERBASIS MELAMIN FORMALDEHID
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2910

Abstract

The microcapsules containing diazinon as the core material and melamine formaldehyde as the membrane material have been synthesized by in situ polimerization method. The microcapsule membrane on this researches was modified in two types, the first, melamine formaldehyde (MF) and the second types, melamine formaldehyde added with sodium dodecyl sulphate and polyvinyl alcohol (MF-SDSPVA). This research aims to study the effect of pH and temperature on the release rate of diazinon in aqueous medium. The results showed that the pH and temperature has little effect on the release rate of diazinon from microcapsule based on melamine formaldehyde. This is due to the diffusion through the microcapsule membrane is not influenced by the pH and temperature of the solution outside of microcapsule.
ASPEK PERTIMBANGAN DALAM SIMULASI FERMENTASI FASE GAS BERBASIS CFD
Jurnal Bahan Alam Terbarukan Vol 2, No 1 (2013): June 2013
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v2i1.2911

Abstract

In the midst of restrictions issue on the use of fossil fuels, the world began to move towards the use of renewable fuels. One such fuel is hydrogen. Hydrogen itself could synthesized from fermentation method. Complex phenomenon will be difficult to be analyzed simultaneously and comprehensively when using conventional techniques. Optimation would be important since yield hydrogen from fermentation method was very small. Cause of few obstacles such as comprehensive phenomenon data not exsted mades this process very difficult to optimize. Simulation of hydrogen fermentation based on CFD would be one of the solution to retrieve phenomenon data comprehensively

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