Publisher: Universitas Negeri Semarang   (Total: 79 journals)   [Sort by number of followers]

Showing 1 - 79 of 79 Journals sorted alphabetically
Accounting Analysis J.     Open Access   (Followers: 11)
ACTIVE : J. of Physical Education, Sport, Health and Recreation     Open Access   (Followers: 30)
BELIA : Early Childhood Education Papers     Open Access   (Followers: 9)
Biosaintifika : J. of Biology & Biology Education     Open Access   (Followers: 9)
Catharsis : J. of Arts Education     Open Access  
Chemistry in Education     Open Access   (Followers: 9)
Chi'e : J. of Japanese Learning and Teaching     Open Access   (Followers: 3)
Dinamika Pendidikan     Open Access  
Economic Education Analysis J.     Open Access   (Followers: 1)
Economics Development Analysis J.     Open Access   (Followers: 5)
Edu Elektrika J.     Open Access   (Followers: 1)
Edukasi     Open Access  
ELT Forum : J. of English Language Teaching     Open Access   (Followers: 11)
English Education J.     Open Access   (Followers: 2)
Forum Ilmu Sosial     Open Access  
Geo-Image     Open Access  
Harmonia     Open Access  
Imajinasi : Jurnal Seni     Open Access  
Indonesian J. of Chemical Science     Open Access   (Followers: 1)
Indonesian J. of Conservation     Open Access  
Indonesian J. of Curriculum and Educational Technology Studies     Open Access   (Followers: 2)
Indonesian J. of Early Childhood Education Studies     Open Access   (Followers: 3)
Indonesian J. of Guidance and Counseling     Open Access  
Indonesian J. of History Education     Open Access   (Followers: 1)
Innovative J. of Curriculum and Educational Technology     Open Access   (Followers: 4)
Intl. J. of Active Learning     Open Access  
Intuisi : Jurnal Psikologi Ilmiah     Open Access  
J. of Economic Education     Open Access  
J. of Educational Development     Open Access   (Followers: 5)
J. of Educational Research and Evaluation     Open Access   (Followers: 2)
J. of Educational Social Studies     Open Access   (Followers: 9)
J. of Edugeography     Open Access   (Followers: 2)
J. of Indonesian History     Open Access   (Followers: 4)
J. of Innovative Science Education     Open Access   (Followers: 2)
J. of Law and Legal Reform     Open Access   (Followers: 3)
J. of Nonformal Education     Open Access   (Followers: 1)
J. of Physical Education and Sports     Open Access   (Followers: 8)
J. of Physical Education Health and Sport     Open Access   (Followers: 1)
J. of Primary Education     Open Access   (Followers: 14)
J. of Sport Sciences and Fitness     Open Access   (Followers: 16)
JEJAK : Jurnal Ekonomi dan Kebijakan     Open Access   (Followers: 1)
JILS (J. of Indonesian Legal Studies)     Open Access   (Followers: 2)
Joyful Learning J.     Open Access   (Followers: 1)
Jurnal Abdimas     Open Access  
Jurnal Bahan Alam Terbarukan     Open Access  
Jurnal Bimbingan Konseling     Open Access   (Followers: 4)
Jurnal Dinamika Manajemen     Open Access  
Jurnal Fisika     Open Access  
Jurnal Geografi     Open Access  
Jurnal Inovasi Pendidikan Kimia     Open Access   (Followers: 5)
Jurnal Kesehatan Masyarakat     Open Access   (Followers: 5)
Jurnal Komunitas     Open Access   (Followers: 1)
Jurnal MIPA     Open Access   (Followers: 3)
Jurnal Pendidikan Bahasa dan Sastra Indonesia     Open Access   (Followers: 4)
Jurnal Pendidikan Fisika Indonesia (Indonesian J. of Physics Education)     Open Access   (Followers: 2)
Jurnal Pendidikan IPA Indonesia     Open Access   (Followers: 2, SJR: 0.206, CiteScore: 1)
Jurnal Sastra Indonesia     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknik Sipil dan Perencanaan     Open Access   (Followers: 1)
Kreano, Jurnal Matematika Kreatif-Inovatif     Open Access   (Followers: 5)
Language Circle : J. of Language and Literature     Open Access   (Followers: 2)
Lisanul' Arab : J. of Arabic Learning and Teaching     Open Access   (Followers: 1)
Management Analysis J.     Open Access  
Pandecta : Jurnal Penelitian Ilmu Hukum     Open Access   (Followers: 1)
Public Health Perspective J.     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Scientific J. of Informatics     Open Access   (Followers: 1)
Seloka : Jurnal Pendidikan Bahasa dan Sastra Indonesia     Open Access   (Followers: 5)
Solidarity : J. of Education, Society and Culture     Open Access  
Unnes J. of Biology Education     Open Access   (Followers: 1)
Unnes J. of Mathematics     Open Access   (Followers: 3)
Unnes J. of Mathematics Education     Open Access   (Followers: 5)
Unnes J. of Mathematics Education Research     Open Access   (Followers: 10)
Unnes J. of Public Health     Open Access  
Unnes Law J.     Open Access   (Followers: 1)
Unnes Physics Education J.     Open Access   (Followers: 4)
Unnes Physics J.     Open Access   (Followers: 1)
Unnes Science Education J.     Open Access  
Wacana : Jurnal Sosial dan Humaniora     Open Access  
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Jurnal Bahan Alam Terbarukan
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2303-0623
Published by Universitas Negeri Semarang Homepage  [79 journals]

    • Authors: Achmad Chumaidi, Dwina Moentamaria, Anggit Murdani
      Abstract: A kinetic model was proposed for the synthesis of methane to be dimethyl ether (DME) in one reaction step from (CH4 + O2) and (CH3OH) to dimethyl ether using kinetic CuO-ZnO /gAl2O3 catalyst parameters. The bifunctional catalyst of the series kinetic reaction model according to the experimental results obtained under isothermal conditions in a pipe flow reactor under various operating conditions: 225-325 ° C; 10 bar gauge; Residence time, 16-57.0 (g Catalyst) hour (mole CH4) -1. An important step for modeling is the synthesis of methanol from (CH4 + O2) and the synthesis of (CH3OH to DME) is methanol dehydration (very fast), and water-shifting and CO2 (equilibrium) reactions. The effects of water inhibition and CO2 were also taken into account in the synthesis of methanol and the formation of hydrocarbons. The dehydration advantage of methanol can achieve higher yields above 60 % methanol that was converted to DME and the remaining 5% methanol if (CH4 + O2) comes in at 10 bar gauge and 375 ° C. At higher temperatures produces CO2 and H2O. Methane-methanol-DME series reaction model follows single-order gas phase reaction to methane and methanol with k1 = 0.195 minutes-1 and k2 = 0.115 minutes-1 The time and maximum concentration occurs in the formation of methanol constituents 9.5 minutes and 0.44 mole
      PubDate: 2018-05-18
      DOI: 10.15294/jbat.v7i1.11403
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Prayitno Prayitno, Hadi Saroso, Hardjono Hardjono, Sri Rulianah
      Abstract: In Indonesia, Hospital wastewater treatment generally use biological process followed by chlorination process. Chlorination process has a negative impact on the aquatic environment that is cause death of other microorganisms by the residual chlorine. On the other hand, ozone is more effective than chlorine in killing microorganisms and other pollutants in hospital wastewater. The objective of research is to determine the effect of contact time and dose of ozone to reduction of pollutants (BOD, COD, free Ammonia and Phenol) in hospital wastewater. The experiment was carried out using an ozone reactor containing 'packing', an ozone generator as an ozone gas supplier. The experimental material is a hospital wastewater containing BOD, COD, Phenol and Ammonia free. The experimental variables used were: Contact time (1, 2, and 3 min), Dose of ozone (10, 15, and 20 mg/ L). Experiments were done by flowing hospital waste water at the top of the reactor ozone at certain rate and simultaneously flowed ozone gas from an ozone generator in the bottom of the ozone reactor so that it contacts the fluid in counter-current to the surface of the packing material (packing) in an ozone reactor. By adjusting the flowrate of the wastewater and the height of the packing, it can be determined the amount of contact time and ozone dose. Furthermore, by measuring the amount of pollutant concentration on the influent and effluent of the ozone reactor, it can be obtained the amount of removal in the pollutant concentration of the hospital wastewater.The results showed that contact time and ozone dose influence the decrease of pollutant concentration in hospital wastewater where contact time at 3 minutes and ozone dose 20 mg/L and ozonation time 15 minutes can reduce of pollutants concentration as BOD (97%), COD (98%), Ammonia free (97%), and Phenol (96%).
      PubDate: 2018-05-17
      DOI: 10.15294/jbat.v7i1.11401
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Nur Hidayati, Tomy Kurniawan, Nindya I. Kusumawardani, Rahmah P. Sari
      Abstract: The extraction of Indigofera Tinctoria Linn leaf into natural dyes was studied using two methods: maceration and ultrasonication. Other variables tested were the differences in the degree of solvent acidity used: neutral, alcoholic, acid and base. The yield and the dye strength measured by the absorbance are response to the change of those variables. The better yields were obtained from ultrasonication method compared to the maceration one. The highest yield was shown in the result of maceration method at neutral condition, 2.3%, while in ultrasonic method was at alcoholic condition 13%. The acidity of the solvent affects the resulted colour. By using maceration method and the neutral condition produced dark blue, the acid solvent produced a grey dye, the alkaline produced a greenish dye and the alcoholic produced a brownish dye. With the aid of ultrasonication, blue dye was generated on the use of neutral, acid and alcoholic solvents, whereas brownish was on alkaline solution.
      PubDate: 2018-05-17
      DOI: 10.15294/jbat.v7i1.11405
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Ivana Grasielda
      Abstract: This research is to find out the process to make an ice cream using durian’s albedo flour. Start from to make durian albedo flour, to check content of durian’s albedo flour ice cream (pectin, protein, fat, and carbohydrate), to find out respondents’ opinion about display, color, smell, texture, and flavor of durian’s albedo ice cream, and also interests of respondents about ice cream using durian’s albedo flour. Populations of this research are spread at Wonorejo Permai Residence, Universitas Ciputra, and Bukit Darmo Boulevard. Researchers are choosing 30 random respondents as sample. There are few steps to collect the data. First, experiment method which had done three times for both of durian’s albedo flour and ice cream using durian’s albedo flour. Second, observation method, the researcher compared the result from experiments which had been done in the experiment method. Third, laboratory test, to find out the content of pectin, protein, fat, and carbohydrate from the ice cream using albedo durian flour. Fourth, organoleptic test to find out the shape, texture, flavor, and smell of ice cream using albedo durian flour. To do an organoleptic test, an ice cream will tested at laboratory, then distribute to the 30 random respondents and they will give their opinion in the questionnaires. Fifth is the descriptive statistics, where the researcher will process the questionnaire’s results. Based on the research that has been done, it concluded that durian’s albedo from the skin waste could be used as the ingredients for processed food. Moreover, based on organoleptic test with 30 respondents, shown that 96.7% of respondents interest with durian’s albedo ice cream.
      PubDate: 2018-05-10
      DOI: 10.15294/jbat.v7i1.11413
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Michael Ricky Sondak, Hari Minantyo, Prasetyon Sepsi Winarno
      Abstract: This research is used to explore local ingredients from Musa Acuminata AA. Musa Acuminata AA foodstuffs are usually used only as a raw fruit, not much processed into another food product. Food innovation that raise local potential is needed to increase local food value. This study is an experimentation research, which is uses laboratory experiments at the Food and Beverage Laboratory of Universitas Ciputra Surabaya. Data was collected from 20 respondents by using organoleptic test. There were 3 times of organoleptic test: 1). organoleptic test with whitewash immersion (code 001); 2). organoleptic test with Citroen water immersion (code 002) and 3). organoleptic test without any immersion process (code 003). Musa Acuminata AA flour tested in Research and Industry Standardization Laboratory to know about the moisture, protein, carbohydrate, fiber and potassium. The result: nutrition content code 001. Aw 0.351(25.7C); moisture 7.27%; protein 4.00%; carbohydrate 66.65%; fiber 2.79%; potassium 819.76 mg/100g. Nutrition content for code 002: Aw 0.347(25.6C); moisture 7.30%; protein 4.00%; carbohydrate 68.58%; fiber 2.00%; potassium 780.24 mg/100g. Nutrition content for code 003 Aw 0.536(25.5C); moisture 10.04%; protein 4.01%; Nutrition content for code 68.60%; fiber 1.61%; and potassium 990.18 mg/100g.
      PubDate: 2018-05-10
      DOI: 10.15294/jbat.v7i1.11415
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Prima Astuti Handayani, Ria Wulansarie, Paisal Husaen, Isna Mardya Ulfayanti
      Abstract: Nyamplung (Calophyllum inophyllum) oil contains high free fatty acid (FFA) that is 21.62%. Nyamplung oil can be utilized as raw material for biodiesel production. Microwave is a method of heating that is used intensively to speed up the production process. Ionic liquid has high catalytic activity, high selectivity, can be recycled and environmentally friendly. This study learned about the esterification of nyamplung oil with ionic liquid 1-Butyl-3-methylimidazolium hydrogen sulphate (BMIMHSO4) as catalyst and microwave-assisted. The purpose of this study is to obtain optimum condition of esterification process, with free fatty acid concentration (FFA) <2%. This study uses raw materials of nyamplung oil, methanol and BMIMHSO4 as catalyst. Equipment used in study was batch reactor equipped with temperature sensor with microwave heating system. The research variables studied were reaction temperature (50-70oC), molar ratio oil to methanol (1:30-1:60) and catalyst concentration (5-17.5%). The result of esterification reaction was analyzed by FFA (free fatty acid) content using titration analysis. The best free fatty acid (FFA) result was 1.92%, with molar ratio of oil to methanol was 1:40, catalyst concentration was 15% by weight and at 60oC for 120 min. The esterification of  nyamplung oil meets the criteria as biodiesel feedstock.
      PubDate: 2018-03-12
      DOI: 10.15294/jbat.v7i1.11407
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Eko Naryono, Arief Budiono, Sandra Santosa
      Abstract: The combustion process of organic waste has several drawback which produce flue gases containing pollutants SO2, HCl, tar and heavy metals (Cu, Hg, Fe, Zn, Pb, and Cr). The pollutants can be  removed  from the flue gas using a water scrubber. The process of absorption using the water scrubber  can cause a rise in pressure in the combustion chamber.This research aims to study the effect of combustion process pressure of organic waste on the combustion rate. The research was conducted by burning waste in the reactor at various flow rate of combustion air. The exhaust gases of combustion then flowed into ihe water scrubber that the height varied. The change in pressure and combustion rate of each variation of the air flow rate and the height of the water scrubber was measured. According to the results, it was obtained the correlation of combustion pressure to the  combustion rate was y = 0,844e-0,2X, where y = the combustion rate (kg/min) and x = combustion pressure (gauge, mm H2O). In addition, the increase in combustion pressure up to 21 mm of water, caused a reduction in combustion temperatures up to 50 ° C, while the combustion rate decreased to one-tenth from atmospheric combustion.
      PubDate: 2018-03-12
      DOI: 10.15294/jbat.v7i1.11395
      Issue No: Vol. 7, No. 1 (2018)
           FATTY ACID CONTENT ON MICROALGAE CULTURE OF Spirulina sp. and Skeletonema

    • Authors: Nita Rukminasari, Muhammad Lukman, Rahmadi Tambaru, Dwi Fajriyati Inaku, Suharto Suharto
      PubDate: 2018-02-21
      DOI: 10.15294/jbat.v7i1.8513
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Octovianus S. R. Pasanda, Abdul Azis
      PubDate: 2018-02-21
      DOI: 10.15294/jbat.v7i1.11412
      Issue No: Vol. 7, No. 1 (2018)

    • Authors: Andi Muhamad Iqbal Akbar Asfar
      Abstract: This study characterizes the saccharide sugar contained in whole sweet corn seeds by extracting using Ultrasound Assisted Solvent Extraction for 60 minutes with 24 kHz frequency using ethanol solvent with concentrations of 70%, 75%, 80%, and 85%. The concentrated extract was then characterized by using Gas Chromatography Mass Spectrometry (GCMS) method. Sample test conducted were tested to odor, color and shelf life of extract and determination of water content, ash content, and characterization of saccharide sugar from GCMS test. The odor and color test results show that the extract had a distinctive smell of sweet corn, yellow, and had the ability to store good extract in the condition of the room. The water content of each sample ranged from 3% - 9% with the lowest water content was in 85% concentration sample which was 3.62%, while the ash content ranged from 1.5% with the highest ash content which was in 85% concentration sample which was 1.59%. The results of characterization were identified by 3 compounds having the highest percentage of 2-Furaldehyde, Hexamethyl Cyclotriloxane, and 1,2,4-Trimethyl Benzene with the percentage of 26,94%, 9,95% and 13,82% respectively. 2-Furaldehyde includes heterocyclic aldehyde group sugars, whereas Hexamethyl Cyclotriloxane and 1,2,4-Trimethyl Benzene belong to the class of organosilicon and aromatic hydrocarbons. 2-Furaldehyde or Furfural serves as a tongue nerve stimulator and has great potential to be developed as an important non-petroleum-based chemical raw material. The GCMS results provide information that the obtained 2-Furaldehyde has a molecular formula C5H4O2 or C4H3OCHO which is a monosaccharide group which is aldose with the number of C atoms classified as pentose. The retention time was 3.062 minutes with a mass peak of 300 m/z with molecular weight was 96 g/mol.
      PubDate: 2017-12-21
      DOI: 10.15294/jbat.v7i1.11416
      Issue No: Vol. 7, No. 1 (2017)

    • Authors: Siti Fathonah, Rosidah Rosidah, Stella Septianarta
      Abstract: Snacks which are most widely consumed by early childhood are biscuits. The conventional raw ingredients of biscuits are varied with yellow corn starch, which contains beta-carotene. The composition of yellow corn biscuit consists of 50% yellow corn starch, 40% wheat flour, and 10% cornstarch, and butter. The use of butter was varied in 25%, 30%, and 35%. An analysis was conducted on its energy content, protein, fat, and beta-carotene, as well as acceptance. The results of the study showed nutrient content was not entirely different from the use of margarine 25% and 35%, the energy was 441-468 kcal, protein was 6.4 to 7.3%, fat was 18.3 to 21.7%, and beta-carotene 2,721 -4,134 mg. The energy density of corn biscuits was 3.5 - 3.9 g / 1000 kJ. Yellow corn biscuits were considered as high-energy biscuits (> 400 kcal). The organoleptic test of the biscuits in early childhood conducted on all indicators (color, aroma corn, fragrant aroma, and crispness, sweet and savory taste) showed that the biscuits were categorized as likable. The use of different percentage of margarine is not significant concerning the acceptability of biscuits, except for the aspect of the fragrance and sweetness between the use of margarine 30% to 35%. Industrial-scale production is necessary for the dissemination of the consumption of yellow corn biscuits with margarine 35%, in particular for the early childhood
      PubDate: 2017-11-02
      DOI: 10.15294/jbat.v7i1.9723
      Issue No: Vol. 7, No. 1 (2017)
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Heriot-Watt University
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