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Jurnal Penelitian Saintek

saintek
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Published by Universitas Negeri Yogyakarta

ISSN : 14123991 EISSN : 25287036 DOI : 10.21831

Core Subject : Science,

Decision Sciences, Operations Research & Management

Arjuna Subject : -

Articles 286 Documents

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INFLUENCE OF TYPE NUT TYPE, MANUFACTURE PROCESS AND TYPE OF INOKULUM ON CHANGE OF NUTRITION IN NUT TEMPE FERMENTATION OF TOLO BEAN Nani Ratnaningsih; Mutiara Nugraheni; Fitri Rahmawati
Jurnal Penelitian Saintek Vol 14, No 1: April 2009
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objective of research is to increase pulses-based food security by the way of local foodstuff diversification, that is tempe from tolo bean. Specific objective of research is to study of influence some tolo bean types, making process, and inoculum types to nutrient changing during fermentation tempe from tolo bean.Research was done experimentally since May up to November 2008. Research was conducted by analysis proximate and digestible protein. Proximate analysis include water content, ash content, crude fat content, total protein content, dietary fibre content and carbohidrate content (by difference). Design research was complete block design with 2 times experiment replicates and 3 times sample replicate. Independent variable was tempe from tolo bean. Dependent variable was result of proximate analysis and digestible protein. Data analysis was conducted by analysis of variance and post hoc test of DMRT (Duncan Multiple Range Test) at 5 % significance level.Based on result of research can concluded that 1) process of tempe from tolo bean yielding which highest digestible protein was wet grind processing with usar leaf, and 2) tolo bean types, making process, and inoculum types had significantly influence to nutrient changing during fermentation tempe from tolo bean.

PROTOTYPE OF ADAPTIVE CONTROL SYSTEM SOFTWARE USING PERCEPTRON LEARNING ALGORITHM Masduki Zakaria
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This aims of this research is to build and to make performance test a software prototpe of adaptive control system with perceptron learning algorithm.Needs analysis is performed to find an adaptive control system specifications are required, the result is a blue print software, after a modification of the learning algorithms are tailored to the programming language, the result is a flow chart design. Software implementation is based on the flow chart that was created by using a developed by research and development approach.The results showed that th group data in the analytical calculations with research data from a running program at every step in iteration, there was no sognificant difference between the description of data in two research groups.ub 0{� sb`�5P8 ( =vacancy), lost the interlayer water by being heated up to 200oC to produce a dehydrated phase, H0.54 Ti1.865 0.135O4. Above 300oC, the dehydrated phase completely transformed to TiO2(B) and anatase was obtained as pure phase at 600oC. The phase transformed as the following process: H0.54Ti1.865 0.135O4 0.5H2O à H0.54Ti1.865 0.135O4 0.25H2Oà H0.54Ti1.865 0.135O4 à TiO2(B) à TiO2-anatase.

THE CHARACTERIZATION OF SEVERAL METAL IONS TOWARDS THE ENZYME TRYPSIN ACTIVITY Das Salirawati
Jurnal Penelitian Saintek Vol 21, No 2: Oktober 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the optimal conditions of the trypsine enzyme and the effect of metal ion Ag + (in the form of AgNO 3 ), metal ion Cu (in the form of CuCl 2 ), K + metal ions (in the form of KHPO 4 ), and ion Metal Zn (in the form of ZnSO ) in various concentrations towards trypsin enzyme activity using casein substrate. The activity of trypsin enzyme was determined by Anson method in optimum conditions. The data were analyzed using qualitative descriptive. The results show that the activity of trypsin enzyme with substrate casein 10mg/mL in pH 8.37°C, incubation time of 20 minutes with the additional of ion (Ag 4 , Zn 2+ , K 2+ +, Cu2+) at various concentrations. Based on the research results, it was empirically proven that they were tendency of Ag + + dan Cu 2+to act as inhibitors and metal ions Zn 2+ and K + 2+ to act as activators to trypsine enzyme activity at casein substrat.

BIODEGRADATION OF POLYURETAN RESULTS OF SYNTHESIS OF SOYBEAN OIL, GLYCOLOLY POLYOKYLETHLES, AND METHYLES-4,4'-DIFENILDIISOSIANAT Eli Rohaeti; Senam Senam
Jurnal Penelitian Saintek Vol 15, No 2: Oktober 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objective of research were to synthesize polyurethane from soybean oil, P EG400 and MDI, to determine the cross linking, and to learn the influence of incubation times toward degradability of polyurethane. Polyurethane was synthesized from soybean oil and oxydated soybean oil at room temperature followed by curing for 10 hours at 70 DC,and than at 100 "c for 3 hours. The synthesis was conducted with mass compositionSBOI OSBO : P EG400 : MDI = 1 : 2 : 3. Biodegradation was conducted by usingmicroorganism in an actived sludge of malka medium at 37°C. The variation of incubation times were 5, 10, 15, 20, 25, and 30 days, respectively with changes of media every 5 days. Characterizations of polyurethane were functional groups, cross linking, mass loss and biodegradability. The oxydated soybean oil has increased intensity of -OR functional group, hydroxyl number, density, melting and boiling point, otherwise the refraction index has decreased. The synthesized polyurethane has characteristic absorption of urethane functional group and cross link. The increasing of incubation time can decrease biodegradability of polyurethane. The mass loss of polyurethane from SBO-PEG400-MDI has the higher. Biodegradation can disappear urethane group and decrease crystallinity of polyurethane. Key words: biodegradation, mass loss, crystallinity, polyurethane

ANALYSIS OF TIRE FILLING RESULTS ON TIRE PATCH WITH AUTOMATIC TEMPERATURE CONTROLLER I Made Arsana
Jurnal Penelitian Saintek Vol 22, No 2: Oktober 2017
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

An automatic temperature control tire patch are designed to make it easier to patch the tires, shorten the time and improve the quality of the tires. Tire fatch with automatic temperature controller are equipped with thermocouple and thermocontrol displays. Thermocouple is used as a temperature sensor and thermocontrol display as a medium that can be used to adjust and determine the tire temperature. This experimental study aims to determine the performance of tire patch tool in producing good quality patches with a relatively short time. Equipment and instruments used in this research are display thermocontrol, thermocouple, voltmeter, and amperemeter. The data obtained are then analyzed descriptively. The best patch results in this study were found at 70oC in the "perfect" category. The T1 temperature is 134oC, T2 is 70oC and T3 is 65,9oC, while the heat transfer rate at Qplate is 36,500 watts and Qban is 0,0691875 watts with the time of filling for 1 minute 47 seconds (107 seconds).

CALCULATION OF RADIONUKLIDA FORMATION ON ION CYCLOTRON SOURCE COMPONENTS Silakhudin Silakhudin
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This paper presents a prediction of radiation exposure on particle accelerator of cyclotron type that was began with calculation of radionuclides formationon ion source component has been done. The objectives of research are to identify the formation of radionuclides and probability of its radial distribution on ion source component. The methods of this research are to identify proton nuclear reaction with ion source component, determine of ion energy as radius function then converted to nuclear reaction cross section versus radius, and to determine the relation of ion beam transmission coefisient as function of radius. The probability of radionuclide formation can be determined with multiplying the reaction cross section and transmission coeffisient on certain radius. The result showed that the 65Zn and 63Zn radionuclides are important to be considered at the radius of several centimeters towards the extraction radius which location at maximum yields of radionuclides formation of 100% relatively on the radius of 36 cm and 38 cm respectively.

THE EFFECT OF TRICHODERMA SP. SEED COATING AND THE APPLICATION OF BOKASHI TOWARD SOYBEAN YIELD Intan Winara; Sumadi Sumadi; Anne Nuraini
Jurnal Penelitian Saintek Vol 23, No 2: Oktober 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the effect of seed coating using Trichoderma sp. and applying bokashi to increase soybean yields. The study was carried out in the Ciparanje experimental garden of Padjadjaran University in Jatinangor in April to July 2017. The design used in this study was a Randomized Block Design which was repeated three times. The soybean seeds used are Anjasmoro varieties. Tricho-G as a source of Trichoderma sp. was used as a seed coating material. Bokashi cow manure and the soil used were from paddy fields. Other ingredients used were Urea, SP-36, KCl, and pesticides with the active ingredient Profenofos. The step of the research is bokashi application, seed coating, storage, planting, fertilizer application, and observation. The results show that the combination of seed coating using Trichoderma sp. and bokashi application had an effect on increasing the number and weight of seeds per plant. Coating of seeds with Trichoderma sp. low doses can still maintain plant growth and has a positive effect on crop yields.PENGARUH PELAPISAN BENIH TrichoDERMA SP. DAN PEMBERIAN BOKASHI TERHADAP HASIL PANEN KEDELAIPenelitian ini bertujuan untuk mengetahui pengaruh pelapis benih menggunakan Tricho-derma sp. dan pemberian bokashi terhadap peningkatan hasil panen kedelai. Penelitian dilaksanakan di kebun percobaan Ciparanje Universitas Padjadjaran Jatinangor pada bulan April sampai dengan Juli 2017. Rancangan yang digunakan dalam penelitian ini yaitu Rancangan Acak Kelompok yang diulang tiga kali. Benih kedelai yang digunakan yaitu varietas Anjasmoro. Tricho-G sebagai sumber Trichoderma sp. digunakan sebagai bahan pelapis benih. Pupuk Bokashi kotoran sapi dan tanah yang digunakan berasal dari tanah sawah. Bahan-bahan lain yang digunakan yaitu pupuk Urea, SP-36, KCl, dan pestisida dengan bahan aktif Profenofos. Langkah penelitian yang dilakukan adalah pemberian bokashi, pelapisan benih, penyimpanan, penanaman, pemupukan, dan pengamatan. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa kombinasi pelapisan benih menggunakan Trichoderma sp. dan pemberian bokashi berpengaruh dalam meningkatkan jumlah dan bobot biji per tanaman. Pelapisan benih dengan Trichoderma sp. dosis rendah masih dapat mempertahankan pertumbuhan tanaman dan memberikan pengaruh yang positif terhadap hasil tanamaN

ANALYSIS OF POWER PLANT MICROHYDRO (PLTMH) ON RIVER FLOWS ON MONGONDOW RIVER IN MUNTOI VILLAGE REGENCY OF BOLAANG MONGONDOW Parabelem T.D. Rompas
Jurnal Penelitian Saintek Vol 16, No 2: Oktober 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The microhydro power plant (PLTMH) has been analyzed. The objectives of the research are to get water power capasity of PLTMH and electric energy in a year. The data was collected by direct observation in the field. It’s found that water power capasity of PLTMH and electric energy in a year are 19.5 kW and 170.829 MWh.

EXPERIMENTAL STUDY ON THE PHENOMENA ON THE SUCCESSIVE DROPLETS IMPACTING HOT COPPER SURFAC Arif Widyatama; Akmal Irfan Majid; Teguh Wibowo; Deendarlianto Deendarlianto; Samsul Kamal
Jurnal Penelitian Saintek Vol 24, No 2: Oktober 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at investigating the phenomena and interactions between water droplets and hot metal surfaces using an experimental method. In this study, the droplet was dropped from 50 mm from the top of the metal surface with a frequency of 8.5 droplets per second. The observed droplet diameter was 3.12 mm. The metal used was copper with a surface temperature between 110-240 ° C. High speed video camera with a speed of 2000 fps was used to record visual data. Then the image processing technique was applied to calculate the change in droplet diameter. The results show that at low temperatures, droplets tend to maintain their initial position of contact with fluctuating deformations. While at high temperatures, a bounce phenomenon occurs which results in collisions between droplets being imperfect. Visualization results can reveal the complete change in the droplet geometry in the form of spreading ratio and complete apex height. The temperature of 140° C is the initial transition area for phenomena that result in droplets has no contact with hot surfaces so that the process of heat transfer between surfaces is inhibited.STUDI EKSPERIMEN PADA FENOMENA SUCCESSIVE DROPLETS MENUMBUK PERMUKAAN TEMBAGA PANASPenelitian ini bertujuan untuk mempelajari fenomena dan interaksi antara tetesan air (droplet) dan permukaan logam panas dengan metode eksperimental. Pada penelitian ini, droplet dijatuhkan dari posisi 50 mm dari atas permukaan logam dengan frekuensi 8,5 droplet per detik. Diameter droplet yang diamati sebesar 3,12 mm. Logam yang digunakan adalah tembaga dengan temperatur permukaan di antara 110-240° C. High speed video camera dengan kecepatan 2000 fps digunakan untuk merekam data visual. Teknik image processing diaplikasikan untuk menghitung perubahan diameter droplet. Hasil penelitian menunjukkan bahwa pertama, pada temperatur rendah, droplet cenderung mempertahankan posisi awal kontak dengan perubahan bentuk yang fluktuatif. Kedua, temperatur tinggi, terjadi fenomena bouncing yang mengakibatkan tumbukan antar droplet menjadi tidak sempurna. Hasil visualisasi dapat mengungkap perubahan geometri droplet berupa spreading ratio dan apex height secara lengkap. Dari penelitian ini juga diketahui bahwa temperatur 140°C menjadi daerah transisi awal terjadinya fenomena yang mengakibatkan droplet tidak bersinggungan dengan permukaan panas sehingga proses perpindahan kalor antar permukaan terhambat.

MINIMALS SECURITY HOUSE IN YOGYAKARTA Bambang Sugestiyadi
Jurnal Penelitian Saintek Vol 12, No 1: April 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Yogyakarta could be the mirror of "Nusantara" since it had been accumulated with people from "all around the Nusantara for study. Yogyakarta could be considered a town which would grow as "Semi Metropolis" city. there for physical facilities are needed. This research was conducted to know the minimalism architecture development in house development in Yogyakarta.The research was carried out on qualitative design. Data collectedwith observation, visualization, skates maker, photo documentation and deeply and structurally. interview Relevant documentation from some conected departments was taken. Data analyzed with inductive method. It means that all data not to reveal hypothesis but focus on abstract formation based on parts which were collected, than grouped. Triangulation was conducted for testing data validity.The results showed that: (a) House and housing development until2004 decade still dominated by Mediteran Style, Tropical House Style, Classical House Style with ornamens, (b) The Minimalism House Style in architecture focuses on essential and functional things. The Minimalism Style dominated by elementary geometrical form without ornamen or decoration, and it became its character. It began to grow since 2004 to 2006, in Sleman Regency, Yogyakarta.

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