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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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POLY FRACTION (TRIMETILEN-BASED) FROM MONOMER RENEWABLE ONLY SOLUTION AND DECREASE TEMPERATURE Diah Mardiana; Bambang Poerwadi; Budi Kamulyan; Siannita Chandra
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Poly(trimethylene-sebacate), polyester material from glycerol and castor oil monomer resources, have been synthesized. Fractionation using suitable solvent-non solvent composition could be produced the pure polymer. In this experiment dissolution methods were modified by reduced temperature. In order to choose the suitable solvent and its composition, it was monitored by the turbidity, while the effect of reduced temperature were analysed based on poly(trimethylene-sebacate) mass and several physical properties of product. Result showed that the suitable solvent and non solvent were chloroform and methanol, respectively. As with out reduced temperature, the volume composition was 1 : 10, while temperature modified could be reduced 50% of methanol used. Furthermore, concentration of poly(trimethylene-sebacate) of 3% using volume composition of 1 : 5 at temperature of 20-22 oC , it was yielded 48.4% of product. It has melting point of 52 C with intrinsic viscosity of 10.89 mL/g, Mn 2632 g/eq and degree of crystalinity was 30.5%.

MULTIPLICATION EXAMINATION OF TURMERIC EXPLANTS USING AUXIN AND CYTOKININ TO MODIFIED MEDIA Nur Azizah Romadhoni; Erni Suminar; Anne Nuraini; Syariful Mubarok
Jurnal Penelitian Saintek Vol 24, No 1: April 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at obtaining the type and concentration of cytokines as well as the optimal concentration of auxin for the multiplication of turmeric shoots in vitro. The trial was conducted in September 2017 until February 2018 at the Tissue Culture Seed Technology Laboratory of the Faculty of Agriculture, Padjadjaran University. The materials used in this study were Murashige and skoog modified multiplication medium, jelly, sterile distilled water, HgCl2, 70% alcohol, clorox, tween 80 and fungicide and bactericidal. Growth Regulating Substances (GRS) used are BAP, TDZ, Zeatin and NAA. The explant source used was derived from the shoot of turmeric clones from Bogor. The experimental design in this study was Completely Randomized Design (CRD) with seven treatments and four replications. The planting medium used was Murashige Skoog Modification (MS) with the addition of Benzyl Amino Purine (BAP) 9 mg L-1, Thidiazuron (TDZ) 1 mg L-1, Zeatin 0.1 mg L-1 and NAA (0.01 mg L-1, 1 mg L-1). The results show that the combination of BAP 9 mg L-1 and NAA 0.01 mg L-1 produced the highest shoot induction at 12 weeks after planting. Giving zeatin 0.1 mg L-1 and NAA 1 mg L-1 produces the highest shoot length at 12 weeks after planting.PENGUJIAN MULTIPLIKASI EKSPLAN KUNYIT DENGAN PENAMBAHAN AUKSIN DAN SITOKININ PADA MODIFIKASI MEDIAPenelitian ini bertujuan untuk mendapatkan jenis dan konsentrasi sitokinin serta konsentrasi auksin yang optimal untuk multiplikasi tunas kunyit secara in vitro. Percobaan dilaksanakan pada bulan September 2017 sampai Februari 2018 di laboratorium Kultur Jaringan Teknologi Benih Fakultas Pertanian Universitas Padjadjaran. Bahan yang digunakan dalam penelitian ini adalah murashige dan skoog modified multiplication medium, agar-agar, aquades steril, HgCl2, alkohol 70%, clorox, tween 80, fungisida, dan bakterisida. Zat Pengatur Tumbuh (ZPT) yang digunakan yaitu BAP, TDZ, Zeatin, dan NAA. Sumber eksplan yang digunakan yaitu berasal dari tunas kunyit klon asal Bogor. Rancangan percobaan pada penelitian ini yaitu Rancangan Acak Lengkap (RAL) dengan tujuh perlakuan dan empat ulangan. Media tanam yang digunakan yaitu Murashige Skoog Modifikasi (MS) dengan penambahan Benzyl Amino Purine (BAP) 9 mg L-1, Thidiazuron (TDZ) 1 mg L-1, Zeatin 0,1 mg L-1, dan NAA (0,01 mg L-1, 1 mg L-1). Hasil percobaan menunjukkan bahwa kombinasi BAP 9 mg L-1 dan NAA 0,01 mg L-1 menghasilkan induksi tunas tertinggi pada 12 MST. Pemberian zeatin 0,1 mg L-1 dan NAA 1 mg L-1 menghasilkan panjang tunas tertinggi pada 12 MST.

POTENTIAL DECREASE GLASS GAS EMISSION THROUGH MATERIAL CONVERSION FUEL GAS ON GENERAL PUBLIC VEHICLE Zainal Arifin
Jurnal Penelitian Saintek Vol 19, No 2: Oktober 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objective of the research is to retrofit city buses with fuel gas (LPG) is it also gives a general recommendation implementation of control schemes in Indonesia and foundation policies investment, especially urban transportation sector by using the control scheme , in addition to develop the methodology for the valuation of the environmental improvement of urban transport investment. This research can be used for decision-makers for national and local level (city government) in developing policies, strategies, and urban transportation investment program. The results show that the fuel consumption per day are 28.544kg 35.68 liters of diesel (diesel density of 0.8kg/l) and lower heating value of 42.5 MJ/kg, the energy used at 1213.12 MJ/days. The level of reduction in Greenhouse Gas Emissions (GHG) per year to replace petroleum diesel with LPG at 111.93 tons, the total GHG emission reduction of 11 081 tonnes of CO2 e. Financial benefits of LPG generates NPV of Rp. 18,518,582; if there is a rise in the price of LPG fuel, resulting NPV of (-) Rs. 58.17.169. NPV indicates a positive result for Rp. 100 051 666 if bus fares increased 25% from the current rate

UJI ANTIBAKTERI MASKER KEFIR SUSU KAMBING PADA Staphylococcus epidermidis SECARA IN VITRO Ajeng Desti Ningsih; Nur Khikmah
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk mengetahui antibakteri masker kefir susu kambing pada Staphylococcus epidermidis dan menghitung jumlah koloni Bakteri Asam Laktat (BAL) dan khamir. Uji antibakteri dilakukan dengan metode difusi sumuran. Antibakteri masker kefir ditunjukkan dengan adanya zona hambat yang terbentuk di sekitar sumuran. Spread plating dilakukan untuk menghitung koloni bakteri asam laktat dan khamir. Medium MRSA dan PDA diinkubasi pada suhu 37ºC selama 2-3 x 24 jam. Jumlah koloni yang tumbuh dihitung menggunakan metode Standard Plate Count dengan jumlah koloni 30-300, dan dinyatakan dalam satuan CFU/g. Hasil penelitian menunjukkan bahwa masker kefir mempunyai sifat bakteriostatik. Kemampuan antibakteri masker kefir susu kambing pada Staphylococcus epidermidis disebabkan karena di dalam supernatan masker kefir terdapat senyawa antibakteri. Hal ini ditandai dengan terbentuknya zona irradikal. Rerata koloni BAL pada masker kefir susu kambing A dan B adalah 1,5×109 dan 1,2×1010 CFU/g. Rerata jumlah koloni khamir pada masker kefir susu kambing A dan B adalah 2,1×1010 dan 3,0×1010 (3,9×1010) CFU/g.ANTIBACTERIAL OF GOAT’S MILK KEFIR MASK ON Staphylococcus epidermidis IN VITROThis study was aimed at determining the antibacterial goat’s milk kefir mask on Staphylococcus epidermidis and the number of Lactic Acid Bacteria (BAL) and the number of yeast colonies. The antibacterial test was carried out using the diffusion method of the wells. The antibacterial activity in the kefir mask is shown by the presence of inhibitory zones that form around the well. Spread plating was done to calculate the colonies of lactic and yeast acid bacteria. MRSA and PDA medium were incubated at 37ºC for 2-3 x 24 hours. The number of growing colonies is calculated using the Standard Plate Count method with the number of colonies of 30-300 and expressed in units of CFU/g. The results showed that kefir masks had bacteriostatic properties. The antibacterial ability of goat’s milk kefir mask was since the kefir supernatant contained antibacterial compounds. This is indicated by the formation of an nonradical zone. The mean of BAL colonies in goat milk masks A and B was 1.5 × 109 and 1.2 × 1010 CFU/g. The average number of yeast colonies in Goat milk masks A and B was 2.1 × 1010 and 3.0 × 1010 (3.9 × 1010) CFU/g.

PERFORMANCE OF BACKPROPAGATION NEURAL NETWORKS FOR CULTIVATION DAILY LOADS IN JAW A CENTRAL-DIY Kustono Kustono; Yuwono Indro Hatmojo
Jurnal Penelitian Saintek Vol 11, No 1: April 2006
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Goals of this research are implementing Artificial Neural Network (ANN) algorithm for load forecasting and getting its performance. The training data was takenfrom UPB Ungaran. The performance can be got through comparing ANN test result with the real load at that time. The research methodology usc experimental and design models approach. The phases of this research were: I. analyzing and identifying of need 2. developing of load forecasting application software with C programming. 3. entering and training the data to get data pattern.The result of this research. the load forecasting result by ANN was close with UPB loadforecasting. but several ANN test result have more deviation than UPB. because number of training data was less. so the forecasting pattern 111as not too accurate Beside that. another possibility was the number of iteration must be more than / ()()(J timesiterations in order to get more less error. There was 33,3% of ANN result that has more less deviation, although the number of training data was not different, because that data has no extrem variation, sothe pattern was faster to be recognized. Generally, ANN will give an accurate pattern recognation if the data is valid and the number of the data is quite enough.

TEMPERATURE PATTERNS DURING THE ORGANIC ORGANIC WASTE ORDERS OF NATURAL CHILDREN IN NATURAL ENVIRONMENT AND ARTIFICIAL ENVIRONMENT H Yulipriyanto
Jurnal Penelitian Saintek Vol 10, No 2: Oktober 2005
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The purposes of this work are (I) to determine the pattern of temperature during the composting of organic waste of chicken manure at the natural and artificial environment (2) to determine the chemical characteristics of chicken manure Around 700 kg organic wastes of chicken manure put in the hole of land with 2 m length, x2m wide x lm height. The other organic waste in same size put in the artificial environment. During the composting we turn the heap of compost every two weeks especially for organic waste that composted in artificial environment. The data we want to collect is the temperature of the heap of compost in the exterior zone (0-20 em, ), deep zone (50 cmfrom surface,) and low zone (80 cm,from surface). We also analyse the chemical characteristics include the pH, N,P,K total, NH4, Ca .Mg total and c/N ratio; while the organic fraction analysis include the cellulose, lignin, protein, total sugar. The pattern of temperature during composting present the thermophilic phase in the beginning of composting for organic wastes of chicken manure that composted in artificial condition. But this thermophilic phase only rest for one week While natural environment give the thermophilic phase longer until more than 4 weeks. Based on this results we can conclude that the rate of organic waste of chicken manure decomposition during the composting in artificial environment is more quick than that in the natural environment. The chemical characteristics of chicken manure composted show the high contain of NH4, but in the artificial condition the looses of water is higher. Based on the results of organic fraction, the biodegradation of cellulose and lignin in the natural environment is significant than that in the artificial condition.

SUITABILITY EVALUATION OF TEUPIN LAYEU IBOIH BEACH AS THE LOCATION OF MARINE ECOTOURISM Dian Aswita; M. Ali Sarong; Sugianto Sugianto
Jurnal Penelitian Saintek Vol 20, No 1: April 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Teupin Layeu Iboih beach is one of the tourist locations in Sabang City and is one of the locations for marine tourism was developed from mass tourism to ecotourism. This research aimed to assess the suitability of Teupin Layeu Iboih beach as the location of marine ecotourism was carried out from March to June 2014. A descriptive approach was applied by using survey and fi eld observations. The parameters collected are the type of coral reefs, the coral fi sh species, the water depth, the water transparency, the type of beach, the coastal land cover, the bottom material, and the distance of freshwater availability from the beach. Research showed that Teupin Layeu Iboih beach is suitable for marine ecotourism as a recreational area with a value of 73% and very suitable for diving and snorkeling with a value of 86.7%.

INCREASING THERMIC EFFICIENCY OF LAND OIL COMPORT BY APPLYING THE HOUSEHOLD EFFECT PRINCIPLES Jarwo Puspito
Jurnal Penelitian Saintek Vol 7, No 2: Oktober 2002
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

One of components that could be considered in decreasing the rate ofenergy consumption is the household sector. Most of Indonesian householder, who is in the low up to middle class, uses kerosene as the main source energy in daily cooking. The objectives of this investigation are to study the effects of glass thickness and slope on the degree of kerosene-stove efficiency. The results of this research could be used as input in designing the characteristic of a glass concave . cover, which can produce the highest efficiency of a kerosene stove.Design used in this research was factorial experimental design. The thickness and shape of the glass concave cover was considerable as the speed of heating process, which showed the degree of efficiency, was considered.as dependent variable. As the control variable, were room temperature, the length of stove's wick, water volume, initial temperature of water, observation range of temperature, type of stove, and the kerosene quantity in the stove tank. Based on the research design, data were analyzed by two-direction variance analysis. With this method, it could be shown whether the thickness and slope and the degree of the stove efficiency will be shown graphically. Base on the result of the data analysis, it can concluded that (1) the slope of the glass concave cover affect the degree of the stove efficiency, (2) The thickness of the cover did not effect the degree of the stove efficiency, (3) at the slope of 82 degree, it was shown that the efficiency was maximum, (4) in comparison to unmodified stove, the modified stove with glass concave cover had an efficiency of 25, 8 % higher at the slope of 82 degree.

PENGARUH JENIS INOKULAN DAN DOSIS KOMPOS DALAM FITOREMEDIASI MENGGUNAKAN TANAMAN RAMI Desvia Diyanti Nursyabani; Pudjawati Suryatmana; Rija Sudirja
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk mengetahui interaksi antara pemberian jenis inokulan dan kompos rami terhadap laju degradasi hidrokarbon, total populasi Azospirillum sp., dan diameter batang rami. Penelitian ini dilaksanakan dari bulan November 2017 sampai dengan Februari 2018 di Laboratorium Biologi Tanah, Laboratorium Kimia Tanah dan Nutrisi Tanaman, Rumah Kaca dan Kebun Percobaan Fakultas Pertanian Universitas Padjadjaran. Penelitian ini menggunakan rancangan percobaan acak kelompok (RAK) faktorial yang terdiri dari dua faktor yaitu jenis inokulan dan dosis kompos. Perhitungan total populasi Azospirillum sp. dengan metode Total Plate Count (TPC) dan pengukuran kadar Total Petroleum Hidrokarbon (TPH) dengan metode gravimetri. Berdasarkan hasil penelitian dapat disimpulkan bahwa faktor perlakuan jenis inokulan dan dosis kompos pada fitoremediasi tanah tercemar hidrokarbon minyak bumi tidak menunjukkan adanya pengaruh interaksi terhadap laju degradasi hidrokarbon, total populasi Azospirillum sp., dan diameter batang tanaman rami. Terjadi pengaruh mandiri faktor perlakuan dosis kompos terhadap laju degradasi hidrokarbon dan diameter batang tanaman rami. Pengaruh mandiri dosis kompos rami memberikan hasil terbaik pada dosis 2,5% (w/w) terhadap peningkatan diameter batang tanaman rami.THE EFFECT OF INOCULANT TYPE AND COMPOST DOSAGE IN PHYTOREMEDIATION PROCESS USING RAMIE PLANTThis study was aimed at determining the interaction between the administration of inoculant types and hemp compost to the rate of hydrocarbon degradation, the total population of Azospirillum sp., and the diameter of the hemp stem. This study was conducted from November 2017 to February 2018 in the Soil Biology Laboratory, Soil Chemistry, and Plant Nutrition Laboratory, Greenhouse and Experimental Gardens, Faculty of Agriculture, Padjadjaran University. This study used a Randomized Complete Block Design (RCBD) consisting of two factors: the type of inoculant and compost dose. Calculation of the total population of Azospirillum sp. by the Total Plate Count (TPC) method and measurement of Total Petroleum Hydrocarbon (TPH) levels by the gravimetric method. Based on the results, it can be concluded that the factor of inoculant treatment and compost dosage in phytoremediation of petroleum hydrocarbon polluted soils does not show any interaction effect on the rate of hydrocarbon degradation, total population of Azospirillum sp., and stem diameter of hemp plants. There is an independent effect of compost dose treatment factor on the rate of hydrocarbon degradation and stem diameter of the hemp plant. The independent effect of hemp compost dose gives the best results at a dose of 2.5% (w/w) to increase the diameter of the hemp plant stems.

ACTIVITY OF MAKASAR FRUIT (Brucea Javanica L. Merr) ON RADICAL ANION SUPEROXIDE IN VIVO Ari Widiyantoro; Elvi R.P. Wardoyo; Endah Sayekti
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v15i1.1724

Activity of scavengering radical anion superoxide by extract of Makasar fruit (Brucea javanica L. Merr) have been research with methods of inhibition reduction nitroblue tetrazolium, by in vivo on rat Wistar induction with aflatoxin. Results showed there are inhihition reduction of nitroblue tetrazolium by methanol extract, methanol fraction, ethylacetate fraction, methylen chloride fraction and n-hexane fraction. Phytochemical test showed alkaloid, terpenoid, quinone, polyphenol and steroid.

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