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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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THE RELATIONSHIP AMONG PEDICULOSIS CAPITIS, ANEMIA AND LEARNING ACHIEVEMENT IN ELEMENTARY STUDENTS Nunung Sulistyani; Nur Khikmah
Jurnal Penelitian Saintek Vol 24, No 2: Oktober 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the relationship between the Pediculus humanus capitis infestation condition, anemia status and learning achievement in primary school-age children. This study was conducted at SD Bangunharjo Sewon Bantul, Yogyakarta. This study is an observational analytic study with cross sectional design in which the variables are measured in one measurement without intervening. The data obtained through pediculosis examination, Hb examination, and measurement of learning outcomes. The data then were analyzed descriptively presented in tabular form, then performed statistical analysis using the chi-square test. The results show that the students suffering from pediculosis, 57.9% also suffering from anemia and 51.0% having poor category achievement. In line with other researchers, one of the factors that influence one’s learning achievement is the memory factor. Someone’s anemia status can affect one’s memory. The prevalence of Pediculus humanus capitis infestation is 38.3%. Chi-square test showed a significant relationship between Pediculus humanus capitis infestation condition, anemia status, and learning achievement.HUBUNGAN PEDIKULOSIS KAPITIS, STATUS ANEMIA DAN PRESTASI BELAJAR PADA SISWA SEKOLAH DASAR Penelitian ini bertujuan untuk mengetahui hubungan kejadian infestasi Pediculus humanus capitis (kutu kepala) dengan status anemia dan prestasi belajar pada anak usia sekolah dasar. Penelitian ini dilakukan di SD wilayah Bangunharjo Sewon Bantul Yogyakarta. Penelitian ini merupakan penelitian analitik observasional dengan desain cross sectional. Variabel diukur dalam satu kali pengukuran dengan tidak melakukan intervensi. Data penelitian diperoleh melalui pemeriksaan pedikulosis, pemeriksaan Hb, dan pengukuran hasil belajar. Data dianalisa secara deskriptif yang disajikan dalam bentuk tabel, kemudian dilakukan analisis statistik menggunakan Uji chi-square. Hasil penelitian ini menunjukan bahwa menderita pedikulosis sebesar 57,9% menderita anemia dan sebesar 51,0% dengan prestasi belajar kategori kurang baik. Salah satu faktor yang mempengaruhi prestasi belajar seseorang yaitu faktor daya ingat. Status anemia seseorang dapat mempengaruhi daya ingat seseorang. Prevalensi infestasi Pediculus humanus capitis sebesar 38,3%. Uji chi-square menunjukkan adanya hubungan yang signifikan antara kejadian infestasi Pediculus humanus capitis dengan status anemia dan prestasi belajar.

MODIFICATION POLISAKARIDA GALAKTOSA SULPHATE EXTRACTION EXPORT FROM GRACILARIA SP (ALGA MERAH) WITH ALKALI BOROHIDRIDA Sri Atun
Jurnal Penelitian Saintek Vol 6, No 1: Saintek 2001
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objective of the study is to modify the sulphate galactanspolysaccharide (gelatine) provided from extraction of Gracilaria sp with borohydride alkali and its result characterization. The sample of this study was the sulphate galactans polysaccharide provided from extraction of Graci/aria sp. The modified reaction using the Rees method used NaBH4 and NaOH in various compositions. The physical and chemical characteristics of the modification reaction results were compared to the characteristics of the seaweed gelatine provided from the extraction before the treatment and agarosa p.a. The result of this study indicates that the sulphate galactans polysaccharide can be modified by borohidrida alkali reagent in base condition at the composition variations of the seaweed gelatine: NaBH4 : NaOH = 1: 0,5 : ] ; 1 : 1 : 2 and 1: 2 : 4 .The characterization showed that the compound of the modification reaction result compared to the sulphate galactans polysaccharide before the treatment indicated the change of their physical and chemical characteristics. The characteristics of the compound resulted from modification reaction of sulphate galactans polysaccharide at the composition variations of the seaweed gelatine: NaBH4 : NaOH = 1 : 1 : 2 and 1 : 2 : 4 were almost similar to the characteristics of agarosa p. a.

ELECTRICITY PRODUCTION FROM FOOD WASTE LEACHATE USING DOUBLE CHAMBER MICROBIAL FUEL CELL Willie Prasidha; Akmal Irfan Majid
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at evaluating the performance of non-aerated and aerated double chamber microbial fuel cells from food waste leachate. The value of open circuit voltage (OCV) and close circuit voltage (CCV) were taken to analyze power density and current density of both configurations. Two double chamber microbial fuel cells (MFC) with different configurations were developed to produce electricity from food waste leachate and studied for 30 days. Anode and catode were made by uncoated carbon felt and graphite rod. Food waste and water were incubated inside a reactor. After 30 days, the electricity production characteristics between the two configurations were obtained. Both configurations reached the same maximum power density and maximum current density but the aerated MFC showed higher performance of maximum open-circuit voltage (OCV), average power density, and current density than non-aerated MFC. The results show that the supplying continuous dissolved air in the cathode chamber resulted in higher voltage, higher average power density, and higher average current density in double chamber microbial fuel cell.

ESTIMATION OF AGRICULTURE SAVE GARUT CHIPS WITH ACCELERATED TEST METHOD Ichda Chayati
Jurnal Penelitian Saintek Vol 9, No 1: April 2004
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

ion of shelf life 0/ arrowroot chips by accelerated test was~'I1Ialea, Arrowroot chips from KKPA was fried, packed, and kept at and -IO"C and room temperature. followed by hedonic lest and..,...snemtcut analysis. Chemical compositions of arrowroot chips were4.97 % moisture, ]05 % ash.].:/7 % protein, ]715 % fat, 62.7 %(by difference) and -I.M % crude fiber content.' Arrowroot chips fried with good quality frying oil and packed with plastic 05 has /5 weeks shelflife bv estimation If it is kept at room

SYNTHESIS DIBENZIL IS REGISTERED THROUGH THE POLYMERIZED POLYMERYLENE AS ALTERNATIVE RECYCLE PLASTIC RECYCLE Suwardi Suwardi; Crys Fajar Partana; Agus Salim
Jurnal Penelitian Saintek Vol 10, No 1: April 2005
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Synthesis dibenzyl terephathalate were done through PET softdrinkbottles degradation by refluxing in benzyl alcohol at 14~C temperature for 20, 24. and 28 hours in the presence of zinc acetate catalyst. The result of degradation was purified by recristalization in methanol and then melting point (mp), FTIR, I H NMR spectra, and TLC spot were determined. The melting point of product degradation.for 28 hours was 98-99 "c. Based FTIR spectra known thatcompounds of product degradation have OH, C=O, C-O, CH,monosubstituted benzene, disubstituted benzene groups, while on IH NMR spectra showed chemical shift at 8.2 ppm (s, IO H of monosubtituted benzene), 7.5 ppm (s, 9 H consist of 4 H disubstituted benzene and 5 H of aromatic benzyl alcohol), 5.4 ppm (s, 1 H from OH benzyl alcohol), 4.8 ppm (s, 4 H of methylene), and 2.9 ppm (s. 7H of other traces). The single spot ofTLC plate indicated that productdegradation for 28 hours might be a single compound. Based these characterization concluded that compound of product degradation was dibenzyl terephthalate contains benzyl alcohol and other traces.

PUTILIZATION OF PETROCK OIL AS ALTERNATIVE FUEL MACHINES DIESEL - Suhartanta; Zaenal Arifin
Jurnal Penelitian Saintek Vol 13, No 1: April 2008
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study aims to determine the characteristics of jatropha oil biodiesel, both in terms of physics and chemistry. Biodiesel is attempted to be used as a diesel fuel substitute for diesel motors. Further analyzed differences in the performance of diesel motors when using jatropha oil biodiesel fuel and when using diesel.In its implementation, this research begins by examining jatropha oil biodiesel characteristics physically and chemically. Once tested its characteristics, the fuel is used directly on diesel engines to measure opacity, torque, power, and the amount of fuel consumption and then compared with the use of diesel fuel. The comparison analysis of jatropha oil and diesel biodiesel characteristics was all submitted to UGM Chemical Engineering Laboratory. Furthermore, for the measurement of exhaust emissions, torque, power, and fuel consumption is submitted to the Energy Conversion Laboratory of Mechanical and Industrial Engineering Department of FT UGM. Based on the analysis of fuel characteristics, it is found that biodiesel developed as diesel engine fuel derived from jatropa oil (Jatropa Curcas L.) has the same characteristics even on some items that is on the analysis of heating value has better characteristics compared with diesel. The amount of exhaust emissions in the form of the concentration of smoke (opacity) has the greatest decrease, ie the average decrease obtained by 82%, with the best mixture at fraction of 20% .The magnitude of torque resulting from jatropha oil biodiesel testing after compared with diesel at various fractions of the mixture obtained results that the resulting torque increased by an average of 19%. The highest torque was obtained in 20% biodiesel mixture. Furthermore, the amount of power generated from the biodiesel usage of the engine produces a rise in power in the shaft at various rpm variations, and the fraction of the biodiesel mixture has an average power increase of 19%, with the highest power being obtained in the 20% mixture. Fuel consumption for Jatropha curcas biodiesel experienced an average decrease of 24.2% with the best fraction obtained in the 20% mixed fraction.

DETERMINATION OF PHENOL IN WATER USING PHENOL SENSOR Aulia Ayuning Tyas; Zuhrotul Aini; Wulan Sekilas Wari
Jurnal Penelitian Saintek Vol 20, No 1: April 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aim of the research was to study the effect of ionophore concentration, membrane thickness, and pH solution in sensor performance and its application to sample. Method of the research used phenol sensor that can be made by coating Screen Printed Carbon Electrode (SPCE) with ionophore CTAPh (Cethyltrimethylammonium phenoxide) in chitosan membrane.This research used various ionophore concentration (0.5%; 1.0%; 1.5%; 2.0%; and 2.5%), membrane thickness (60µm, 80µm, 100µm, 110µm) and pH solution (9, 10, 11, 12). The research showed that the best phenol sensor performance at 1.5%, 60µm membrane thickness and pH solution 11. The research also showed that the best phenol sensor has 60 seconds response time, the Nernstian factor is 54.437mV/dekade, concentration range between 10-8-10-5 M (0,001-1ppm). Phenol sensor can be used to determine phenol in water which lower than limit detection of standard method.

INTEGRATED ELECTRICAL CONTROL PANELS USING JAVA PROGRAMING Suprapto Suprapto
Jurnal Penelitian Saintek Vol 10, No 2: Oktober 2005
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Technology trend nowadays is connecting one instrument with itothers to be an integrated system that can ease human's work.Integrated Control Panel is an electricity control panel which is controlled remotely. This control panel is so much because of its efficiency which is gained and more than one instrument which are controlled. This control panel is a remote controlled that can ease human's work, do security control and self control. This research a . started from software and hardware plan making and implementing the result of the analytic technique is used to answer whether theresearch on remote sensing using Web can be more efficient and makehuman's work easier. The result of the analytic technique is shown bythe speed of access time between the client and the server. From thefinding it can be conclude that Integrated Control Panel which can be controlled through web browser can be ease human's work in doingcontrol access to electricity instruments. This control method isobviously more efficient because of small access time. This is shown by the mean of access time which is only 265 milliseconds. This panelis provide with database system to save data control. This databasecan be accessed to know the data control.

LACTIC ACID BACTERIA PROBIOTIC OF FISH’S GASTROINTESTINAL TRACT AS WEIGHT AND CHOLESTEROL BOOSTER IN BROILER MEAT Astuti Astuti
Jurnal Penelitian Saintek Vol 20, No 2: Oktober 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This research was aimed at ﬁ nding the inﬂ uence of giving isolate probiotic Lactic Acid Bacteria (BAL) Streptococcus thermophillus from the ﬁ sh’s gastro-intestinal tract toward the broilers’ appearance including the enhancement of the weight, and the broilers’ cholesterol level. The subjects of the research are 40 roosters of broiler chicken, PT Multi Breeder Adirama at the age of 1 week. The probiotic of isolate treatment of BAL used in this research is Streptococcus thermophillus bacteria in the form of freeze dying from Nutrition Biochemical Laboratory, Veterinary Faculty of UGM. Treatment I was as the control (without BAL); the number of BAL in treatment II is 10 6 CFU/ml; the number of BAL in treatment III is 10 CFU/ml; and the number of BAL in treatment IV is 10 CFU/ml. The data recording for the performance was done every week including the weight enhancement. The data collection for cholesterol level enhancement was done at the end of the research. The data which were collected: the weight enhancement, and the broilers’ cholesterol level. The ﬁ nding shows that the treatment of giving lactic acid bacteria of Streptococcus thermophillus caused the broilers’ cholesterol decreased signiﬁ cantly; giving probiotic BAL is not inﬂ uenced toward the performance of growth while the best level of BAL is 108 CFU/ml. 8

SYNTHESIS BUSAPOLIURETAN DAR! OIL DISTANCE AS HEAT ISOLATOR Eli Rohaeti; Suyanta Suyanta
Jurnal Penelitian Saintek Vol 16, No 1: April 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk mensintesis bus a poliuretan dengan memanfaatkan monomer berbasis minyak jarak. Minyak jarak direaksikan dengan senyawa isosianat dan dengan penambahan air pada komposisi bervariasi. Karakterisasi poliuretan meliputi penentuan gugus fungsi, massa jenis, konduktivitas termal, ikatan silang melalui uji penggembungan, dan pengamatan permukaan menggunakan Scanning Electron Microscopy. Poliuretan berhasil disintesis dari minyak jarak dan TDI dengan penambahan air dan aditif (PEG400, PEG 1000, etilendiamin, 1,4-butanadiol, dan asam oleat) ditunjukkan oleh karakteristik gugus fungsi khas. Poliuretan memiliki ikatan silang ditunjukkan oleh derajat penggembungan bernilai positif. Penambahan air dalam sintesis dapat menurunkan massa jenis busa poliuretan. Penambahan aditif berupa PEG400, PEGIOOO, 1,4-butanadiol, dan asam oleat dalam sintesis poliuretan menyebabkan struktur sel busa yang dihasilkan memiliki permukaan dengan ukuran gelembung lebih besar. Penurunan konduktivitas termal busa poliuretan dengan adanya penambahan air disebabkan oleh penurunan massa jenis busa poliuretan dengan penambahan air dalam sintesis busa. Kata kunci: busa poliuretan, konduktivitas termal, minyakjarak, poliuretan

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