cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
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 24 Documents
 1   2   3 
Search results for , issue "Vol 6, No 1 (2017): June 2017 [Nationally Accredited]" : 24 Documents clear
THE PRODUCTION OF BREADFRUIT FLOUR: EFFECT OF HEATER TEMPERATURE TO THE DRYING RATE AND TIME OF THE BREADFRUIT
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.7168

Abstract

The composition of mineral and vitamin from breadfruit is particularly known of having benefits compared to rice which is a main source of carbohydrate consumed by societies. The process of drying is one of the factors that affects foodstuffs quality. The aim of this research was to provide an understanding of drying phenomena from data experiment and discover the influence of drying air temperature to breadfruit drying time and rates. This research was conducted in several stages which are material preparation (breadfruit) by through downsizing process, then weigh the material (breadfruit) once every 5 minutes on each drying air  temperature variations (50 ºC, 60 oC, 70 oC, and 80 oC). The research were conducted using breadfruit with the best drying time which is obtained at 60 0C for 100 minutes. The lowest water content obtained was 0.4%, while the highest drying rate was 0.00144 Kg2/m2.s at 80 ºC of temperature.
ETHANOL PRODUCTION FROM FERMENTATION OF ARUM MANIS MANGO SEEDS (MANGIFERA INDICA L.) USING Saccharomyces Crevisiaea
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.8139

Abstract

The increase of energy needs coupled with the decline in fossil fuel production, requires other sources of energy to meet those needs. One of the solution is using renewable energy. Bioethanol is one of the alternatives to the fossil fuel. This study was aimed at determining the exact mass of mango seeds in producing high grade bioethanol. Bioethanol was produced by fermentation of arum manis mango fruit seed using baker's yeast, Sacczharomyces cerevisiae.  The arum manis mango seeds were known to contain carbohydrate contents of 19.53%. The study was conducted by using different mass of mango seeds 25, 35 and 45 g resectively. The study showed that the samples of 25, 35 and 45 g produce ethanol with concentration of 4.78, 6.64 and 1.48%. These results indicated that the mass of 35 g mango seeds produced highest ethanol content.
THE SYNTHESIS OF CHITOSAN POLYMER MEMBRANE/PVA AS AN ECO-FRIENDLY BATTERY FOR ALTERNATIVE ENERGY RESOURCE
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.6880

Abstract

The eco-friendly materials which have not commonly developed as energy storage alternative sources are solid electrolytes. Chitosan is one of the natural polymer potentially used as the material of solid electrolytes. The purpose of this study is to determine the conductivity value of chitosan polymer’s electrolytes-PVA-glutaraldehyde-NH4Br by varying amount of chitosan and ammonium bromide salt (NH4Br). The polymer electrolyte membrane was made using phase inversion method. Electrolyte polymer is made by mixing chitosan, PVA, glutaraldehyde, and NH4Br to become homogenous liquid and then printed it in petri dish. Polymer electrolyte with chitosan variation of 2; 2.4; 2.8 and 3.2 g has highest ionic conductivity of 1.4983 x 10-2 S/cm with the addition of 2.8 g that can be used as the optimum composition. The variations of salt (NH4Br) were 0; 0.2; 0.4; 0.6; 0.8 and 1 g has the highest ionic conductivity in the point of 2.4385 x 10-2 S/cm with the addition of 0.6 g. The characterization result of FTIR shows OH group at the wavenumber of 3362.02  cm-1, C-O group at 1740.43 cm-1, and C=N group at 1542.41 cm-1. Synthesized polymer can be used as a battery that has 0.43 V voltage.
EXTRACTION OF PHENOLIC COMPOUNDS FROM PETAI LEAVES (PARKIA SPECIOSA HASSK.) USING MICROWAVE AND ULTRASOUND ASSISTED METHODS
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.7793

Abstract

The antioxidant has an activity to neutralize free radical compound that the body needs to avoid damage cells and tissues. Phenolic is one of the compounds that have an antioxidant activity. The influences of ultrasonic-assisted extraction (UAE) and microwave-assisted extraction (MAE) conditions on phenolic compounds of Parkia speciosa Hassk. leaves were investigated. The effects of temperature (40°C, 50°C, 60°C and 70°C), time (10, 30 and 50 minutes) and material-solvent ratio (1:10, 1:13, 1:15 ) were evaluated based on the yield, total phenolic content (TPC) and antioxidant activity. The result showed that the highest yield (15.82%) was obtained at 1:15 (w/w) of material-solvent ratio, 50°C of temperature and 50 minutes of extraction time for MAE. The highest yield of UAE is 15.53% that sample was obtained at 1:13 (w/w) of material-solvent ratio, 60°C of optimal temperature and 30 minutes extraction time. The highest IC50 of UAE method extract was 52.55 ppm, while the extract obtained using MAE method was 50.44 ppm. UAE is more stable at higher temperatures. Time and solvent which was used more efficient than MAE. Extract of petai leaves (Parkia speciosa Hassk.) were very potential to be used as a source of natural antioxidants because they have IC50 values from 41.39 to 66.00 ppm. Its antioxidants capacity is ranged from strong to very strong capacity.

Page 3 of 3 | Total Record : 24

 1   2   3 

Filter by Year

2017 2017


Reset
Filter By Issues
All Issue Vol 12, No 1 (2023): June 2023 [Nationally Accredited - Sinta 2] Vol 11, No 2 (2022): December 2022 [Nationally Accredited - Sinta 2] Vol 11, No 1 (2022): June 2022 [Nationally Accredited - SINTA 2] Vol 10, No 2 (2021): December 2021 [Nationally Accredited - Sinta 2] Vol 10, No 1 (2021): June 2021 [Nationally Accredited - SINTA 2] Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2] Vol 9, No 1 (2020): June 2020 [Nationally Accredited - Sinta 2] Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2] Vol 8, No 1 (2019): June 2019 [Nationally Accredited - Sinta 2] Vol 7, No 2 (2018): December 2018 [Nationally Accredited] Vol 7, No 1 (2018): June 2018 [Nationally Accredited] Vol 6, No 2 (2017): December 2017 [Nationally Accredited] Vol 6, No 1 (2017): June 2017 [Nationally Accredited] Vol 6, No 1 (2017): June 2017 [Nationally Accredited] Vol 5, No 2 (2016): December 2016 [Nationally Accredited] Vol 5, No 2 (2016): December 2016 [Nationally Accredited] Vol 5, No 1 (2016): June 2016 [Nationally Accredited] Vol 5, No 1 (2016): June 2016 [Nationally Accredited] Vol 4, No 2 (2015): December 2015 Vol 4, No 2 (2015): December 2015 Vol 4, No 1 (2015): June 2015 Vol 4, No 1 (2015): June 2015 Vol 3, No 2 (2014): December 2014 Vol 3, No 2 (2014): December 2014 Vol 3, No 1 (2014): June 2014 Vol 3, No 1 (2014): June 2014 Vol 2, No 2 (2013): December 2013 Vol 2, No 2 (2013): December 2013 Vol 2, No 1 (2013): June 2013 Vol 2, No 1 (2013): June 2013 Vol 1, No 2 (2012): December 2012 Vol 1, No 2 (2012): December 2012 Vol 1, No 1 (2012): June 2012 Vol 1, No 1 (2012): June 2012 More Issue