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Journal of Vocational Studies on Applied Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 26848090     DOI : -
Core Subject : Engineering,
Engineering
Journal of Vocational Studies on Applied Research [e-ISSN 2684-8090] is an open access peer reviewed journal published by Vocational School Diponegoro University Semarang Central Java Indonesia. Journal of Vocational Studies on Applied Research is an Journal publishing academic and industrial topics which covers area of interest on applied research as well as vocational studies. Research papers on Engineering, Science and Vocational Studies are welcomed. The Journal is double-blind reviewed which accepts Original Research Paper, Short Communication and Review Articles.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Volume 2, Issue 1, Year 2020 (April 2020)" : 6 Documents clear
Making Liquid Soap from Cooking Oil Purification Results with Sugarcane Waste Adsorbent Rashinta Rizka Putri
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (814.02 KB) | DOI: 10.14710/jvsar.v2i1.7712

Abstract

Cooking oil is high enough economic value. Cooking oil is generally used to cook, but its uses are also many other than for cooking needs, such as skin beauty, lubricants and others. In the condition which the longer time, the price of cooking oil is higher than before, making some society to think creative by recycling the oil which has been used cooking oil. According to the research, it is know that sugarcane waste have strong adsorption potency to water content, and free fatty acid content that found in used cooking oil. The variable of this research are the rinsing time and the amount of sugarcane waste used. The best condition reaches to 40 gr sugarcane waste with the decrease water content reach 0.0050%; the rinse of sugarcane waste in 2x24 hours with free fatty acid intensity adsorption up to 0.23%
Utilization of Soybean Oil as An Anti Mosquito Lotion Faradiva Sansabhilla
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.09 KB) | DOI: 10.14710/jvsar.v2i1.7726

Abstract

The use of repellents as anti-mosquito is currently feared to contain a lot of chemicals so it needs innovation to anticipate them. This study aims to make soybean oil as an innovation in making lotions and to know the manufacturing process. The method of extracting soybean oil is pressing using a Hydraullic Press. Soybean oil extraction based on 9 variables changes namely preheat temperature 100°C; 120°C; 140°C and pressure of Hydraullic Press 1800 psi; 2000 psi; 2200 psi as the test material, the best results were obtained at variable 5 with a variable 120°C and 2000 psi obtained the results of a density of 0,929 gr / ml, viscosity of 28,07 cP and a yield of 3,1%. Making lotion using variable 10 gr of the best soybean oil, Glycerin 20 gr, cetyl alcohol 4 gr, CMC 3 gr, Arabian Gom 0,5 gr and aquadest 10 ml, obtained the results of pH 6 and density 1,0428 gr/ml.Keywords: Hydraullic Press, Lotion, Soybean Oil.
Optimisation of Tapioca Oxidative Reaction by Ozone Treatment: Effect of pH, Process Time and Temperature Siswo Sumardiono; Isti Pudjihastuti; Edy Supriyo; Anggun Puspitarini Siswanto
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (625.206 KB) | DOI: 10.14710/jvsar.v2i1.7621

Abstract

Modification of cassava starch was produced by oxidation using ozone treatment. The oxidized starch is used in the paper processing in the pulp and paper industries.  The aim of this research was to determine the effect of reaction conditions (pH and temperature) in produced oxidized starch. The oxidative reaction of cassava starch was using ozone as an oxidator while the operating condition was at temperatures of 30, 35, 40 and 45 oC in atmospheric pressure. The fixed variables were weight of cassava starch 80 grams, and volume of aquadest 200 ml. The change variables are reaction time (15, 30, 45 and 60 minutes) and pH solution (6, 7, 8 and 9). The product of oxidized starch was analyzed for carboxyl group according to JEFA method, swelling power according to Leach method and solubility according to Kainuma method. The result of this research shows with an increasing of pH reaction and reaction time, the carboxyl group and solubility increased, but swelling power decreased. The best condition was obtained at the pH of 9 with 60 minutes of reaction time.
Corona Virus Pandemic Impact on Sales Revenue of Micro Small and Medium Enterprises (MSMEs) in Pekalongan City, Indonesia Muhammad Milzam; Aditia Mahardika; Rizka Amalia
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (290.741 KB) | DOI: 10.14710/jvsar.v2i1.7600

Abstract

This study aims to determine the impact of the covid-19 pandemic on the sales revenue of Micro Small and Medium Enterprises (MSMEs) in Pekalongan City. The data collected from surveys are sales revenue before and after Corona virus Pademic starting from the enactment of social distancing rules (March 16 2020 until 16 April 2020). The analysis carried out in the form of data analysis and descriptive data  analysis. Based on 282 SMEs units sampled, it was found a decrease in total sales revenue of 53.5%. The type of business that has the greatest reduction in revenue sales is the fashion business. The corona virus pandemic has an economic  impact to the community, especially to the Micro Small and Medium Enterprises (MSMEs) in Pekalongan City. This research is expected to be a policy reference for the local governments to deal with the economic crisis caused by the corona virus pandemic.
Cultural Immersion Program as a Potential Live Laboratory for Applied English Students in Indonesia Girindra Putri Ardana Reswari; James Kalimanzila
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (178.479 KB) | DOI: 10.14710/jvsar.v2i1.7631

Abstract

Applied English students as vocational future graduates must be prepared to be ready to work in international atmosphere directly after they are graduates. One of the most essential skills that should be learned is intercultural interaction. There are two problems that should be answered in this research. First, how is the previous implementation of CIP in Indonesia? Second is why CIP can be used as live laboratory for applied English students? The purpose of this research is to discuss and analyze the success of CIP in Indonesia and its potentials of Cultural Immersion Program (CIP) in becoming the live laboratory for Applied English students. Reflected on the increasing number of International Students in Indonesia, many Cultural Immersion Programs (CIP) held by some institutions to build interaction between local society and international students. This research is a qualitative study. The data is collected by asking 30 international students. This study found that the implementation of CIP in Indonesian is seen as something effective to learn about Indonesia by the international students who ever joined the program. Another finding is CIP could be a miniature of the working place for international tourism since it also has intercultural interaction as well as has same goal and principle with international tourism. Therefore, it could be a potential live laboratory for Applied English students in Vocational School at the university level.  Keywords: cultural immersion program; international student; international tourism; intercultural communication
Utilization of Alurities Trisperma Oil as Biodiesel imer ayu irene
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.812 KB) | DOI: 10.14710/jvsar.v2i1.7677

Abstract

Biodiesel is one of the solutions to the many uses of fossil fuels. Biodiesel itself is a fuel derived from vegetable oil (plant or vegetable fat) called biofuel. In this study, biodiesel used is based on sunan candlenut. The purpose of this study was to determine the optimum time conditions (1.5; 2; 2.5 hours) and the comparison of solvents with candlenut (0.25; 0.2; 0.17) in the manufacture of candlenut oil, as well as knowing the process of making biodiesel. The method used is the manufacture of hazelnut oil by extraction using Soxhlet. The resulting oil was esterified using methanol with sulfuric acid catalyst at a reaction temperature of 60 0C for 60 minutes. The volume ratio between oil and methanol is 4: 1 followed by transesterification at 50 0C for 30 minutes. In the research, the results were optimum time and the number of solvents for good extraction at 2 hours and the ratio of solvents to hazelnut was 0.17. The resulting biodiesel density was 0.82 gr / ml, viscosity was 4.07Cp, FFA value was 1.4%, and the saponification rate was 274.4. From these data it can be said that the Biodiesel produced is approaching the Indonesian National Standard.

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