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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 8 Documents

Search results for , issue "Vol 19, No 1: April 2014" : 8 Documents clear

TEST OF ANTIBACTERY ACTIVITIES IN VIVO NON-POLAR FRACTIONS EXTRACT ETHANOL REST OF RAIN (Ruta angustifolia [L.] Press) ON MEMBER WHICH INFECTED Staphylococcus aureus AND Streptococcus mutans Frida Rosenova; Haryoto Haryoto; Andi Suhendi
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Antibacterial activity in vivo study of ethanol extract nonpolar fraction of inggu stem (Ruta angustifolia [L.] Pers) was conducted on Staphylococcus aureus and Streptococcus mutans. It had a purpose to determine the effect of non polar fraction of ethanol extract of inggu stem on animals that had been infected by bacteria Staphylococcus aureus and Streptococcus mutans. Inggu stem powder was macerated with ethanol 96% and fractionated by vacuum liquid chromatography using hexane : chloroform 6:4, 5:5, 4:6, 3:7. Inggu stem was tested with in vivo antibacterial activity on mice with various doses of 0.3, 1.2 and 2.14 g/kg. Intraperitoneal fluid of mice had been treated was cultured on agar media and colonies of formed bacteria were counted. Antibacterial activity on Staphylococcus aureus bacteria has an average percentage of inhibition for colony are respectively 73, 81 and 97 %., whereas that of the Streptococcus mutans bacteria are 41,81 and 97% respectively. Identification of thin layer chromatography fraction in nonpolar compounds of ethanol extract of inggu stem is indicated by flavonoids, terpenoids, and alkaloids.

OPTIMIZATION OF BISULFIT SALT CONCENTRATION ON COCONUT QUALITY CONTROL OF COCONUT Ellya Indahyanti; Budi Kamulyan; Bambang Ismuyanto
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Bisulphite salt is an additive that usualy added into foodstuff, it was used in order to take a preservation effects. In this research, it was added into coconut sap. The aim of this research was to study the effects of sodium bisulphite adding for increasing coconut sap quality, including pH, reducing sugar and sucrose content. In addition, the rate of sucrose hydrolysis with and without bisulphite have been compared. The volumetric method, i.e Lane-Eynon procedure was used for determining the sugar contents while the hydrolysis rates were measured by polarimetry. The results showed that bisulphite added into coconut sap could repress sucrose hydrolysis.

EFFECT OF MORDAN SYNTHESIS OF CANNED WASTE TO POWER IKAT DAN LAJU REMOVED METHYL VIOLET COLOR DYES BY FABRIC FIBER EFFECT OF MORDAN SYNTHESIS OF CANNED WASTE TO POWER Jaslin Ikhsan; Endang Widjayanti LFX; Sunarto Sunarto
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study aims to determine: the binding capacity of cloth toward methylene violet (MV) dye, the rate of releaseof methyl violet from cloth due to washing, and the effect of the addition of the mordant to the binding capacity and the rate of release. pH, temperature, and equilibrium time were always maintained in all experiments. Data of binding capacity were collected by isothem experiments and performed by measuring the concentration of methyl violet bound by cloth at various added-concentrations of methylene violet. Collected data were analyzed with a Langmuir and Freundlich isotherm equations. Data of release rate were collected by mesuring the concentration of free methylene violet dye in solution due to washing as a function of time. The release data were analyzed using the Lagergren rate equation. The analysis showed that bonding between methylene violet and cloth occurs with releasing protons and via hydrogen bonds. Binding capacity was represented by the Freundlich isotherm equation on which the capacity was decreased by the addition of mordant, with represented bythe constants of k 1 , 2.45 x 10 -8 and 1.75 x 10-8 M MV per gram of cloth, respectively. The addition of mordant also deceleratedoubly the releaseof MV from cloth due to washing whose constants k - 2 were 2103.039 and 1013.958 mmol g-1 min-1, respectively.

PETROLEUM CHARACTERISTICS ETER AND DIETIL ETER AS THE WORK ENERGY WATER ENERGY PUMP F.A. Rusdi Sambada; A. Prasetyadi
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Water pumps in areas without electricity are generally driven by fuel engine. The problem arises while the fuel is getting scarce and expensive. This research aims to create a model of thermal energy water pump and examine petroleum ether and diethyl ether characteristics as working fluid of thermal energy water pump. Parameter variations are done on type of fluid, mass of the working fluid and pumping head. Measurements are conducted on temperature of the working fluid, pumping discharge, time, working fluid pressure and pump pressure. A cycle time of petroleum ether is 158 minutes which is 6 times longer than diethyl ether (24.3 minutes). The discharges of diethyl ether are 0.9, 0.7 and 1.3 liters/min in average, minimum and maximum respectively. They are greater than petroleum ether (0.3, 0.1 and 1.1 liters/min). Diethyl ether generated evaporator pressure greater than petroleum ether (0.7 vs. 0.55 bar). Amount of air in the pressured air tube and in the system affects the volume and discharge. There is optimal mass of working fluid for specific head and amount of air in the pressured air tube. There is also optimal head for specific amount of working fluid mass and air in the pressured air tube.

EFFECT OF RATIO VARIATION Mg / AL IN SYNTHESIS OF HYDROTALSIT WITH HYDROTHERMAL COPRECIPITATION METHOD Sri Handayani; Cahyorini Kusumawardani; Kun Sri Budiasih
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Catalyst are divided into two kinds, homogeneous and heterogeneous catalysts. The catalys tthat constantly developed isa heterogeneous catalyst because could be separated easily and reuseable. The purpose of this research were synthesis and characterization of hydrotalcite Mg/Al as a heterogeneous catalyst which can be use din the aldol condensation reaction. Synthesis hydrotalcite was conducted by hydrothermal coprecipitation method. Synthesis performed with variations mol Mg/Alat a temperature hydrothermal 1000C for 15 hours. Hydrotalcite as a heterogeneouscatalyst preparation was done by calcinationat 4000C. Characterization of synthesized hydrotalcyte was performed by FTIR to identified functional group and XRD analysis to characteriz edits structure. The results showed that the optimum conditions for the synthesized hydrotalcite was obtained atmole ratio Mg/Al3:1.

EFFECT OF 2,4-DICLOROFENOKSIASETAT (2,4-D) AND BENZYL AMINOPURIN (BAP) ON THE GROWTH OF BINAHONG LEAF CENTER (ANREDERA CORDIFOLIA L.) AND ANALYSIS OF FLAVONOID TOTAL CONTENT Lili Sugiyarto; Paramita Cahyaningrum Kuswandi
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aim of this research was to study the effect of various concentration of Plant Growth Regulator in MS (Murashige and Skoog) media on callus growth of binahong leaf and total flavonoid content. The method used in the propagation of callus was the leaf explant of binahong with a Completely Randomized Design (CRD). The leaf explants were planted on MS media with different 2,4-D concentrations (1;2;3 ppm), 0,5ppm IBA+0,5ppm BAP; 0,5ppm IBA+1,0 ppm BAP ; 1,0 ppm IBA+0,5 ppm BAP, each with 15 repetition. The parameters observed in this research were initiation time, type, colour, diameter, the number of callus and total flavonoid content. The result showed that the optimum growth of callus is at 3 weeks and after that it declined or stayed stagnant. The result of the analysis of variance (ANOVA) showed that there is no significant difference in the media used in this research. The total flavonoid content of fresh leaf sample is higher than callus sample.

OPTIMIZATION OF TRANSPORT SYSTEM IN YOGYAKARTA CITY WITH VEHICLE ROUTING PROBLEM MODEL USING ALGORITHM SEQUENTIAL INSERTION Rminugroho Ratna Sari; Dwi Lestari
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The purposes of this study were to build a model for vehicle routing problem (VRP) for waste transportation in Yogyakarta, solve the model obtained using sequential insertion algorithm, then create an Excel Macro programming language to simulate the problem. Waste transportation conditions can be analogous to the VRP by adding intermediate facility at the end of the route, which in this case is the landfill (TPA). To determine waste transportation solved by sequential insertion algorithm. This algorithm is a method to obtain a travel route by updating the node that has not been assigned by inserting between the nodes that have been assigned. Based on 22 TPS simulated with Macro Excel, obtained 4 tours if given planning horizon length is 3 hours, and gained 3 tours if given planning horizon length is 4 hours.

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%.

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