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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 EFFECTS OF PRESSURE AND TYPE OF FILLING GEL TOWARD THE INTENSITY OUTPUT IN PLASTIC OPTICAL FIBER Aisyah Ninda Kusuma Wati; Heru Kuswanto
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the effect of applying pressure to changes in optical fiber output intensity, giving various kinds of filling gel on the connection to fiber optic output. The optical fiber used was Polymer Optical Fiber (POF) type SH-4001-1.3. This POF has a core refractive index of 1.49 and a cladding refractive index of 1.41. The gel was inserted between the optical fiber with a length of 1 cm in a small pipe, then given a variation of pressure so that it affected the intensity of the light. The optical power output from Polymer Optical Fiber was detected using Optical Power Meter (OPM). The light source used was the HeNe laser with a wavelength of 632.8 nm and an output power of 5 mW. The results show that the intensity of the optical fiber output light increases in line with the addition of pressure. Giving pressure on fiber optic joints using various types of gels show that the best light intensity output value was the yellow gel pen. The best sensitivity value on yellow pen gel at a distance of 0.5 cm with a gradient of (0.0035 ± 0.0028) dBm/cm. While the best linearity is in the type of clear pen gel with a distance of 0 cm which is equal to 0.99919.EFEK TEKANAN DAN JENIS GEL PENGISI SAMBUNGAN TERHADAP INTENSITAS KELUARAN PADA FIBER OPTIK PLASTIKPenelitian ini bertujuan untuk mengetahui pengaruh pemberian tekanan terhadap perubahan intensitas keluaran fiber optik, pemberian berbagai macam gel pengisian pada sambungan terhadap keluaran fiber optik. .Fiber optik yang digunakan adalah Polymer Optical Fiber (POF) tipe SH-4001-1.3. POF ini memiliki indeks bias core sebesar 1,49 dan indeks bias cladding sebesar 1,41. Gel disisipkan di antara fiber optik sepanjang 1 cm di dalam pipa kecil, kemudian diberi variasi tekanan sehingga mempengaruhi intensitas cahaya. Daya optik keluaran dari POF dideteksi menggunakan Optical Power Meter (OPM). Sumber cahaya yang digunakan adalah laser HeNe dengan panjang gelombang 632,8 nm dan daya keluaran 5 mW. Hasil penelitian menunjukkan bahwa intensitas cahaya keluaran fiber optik mengalami penaikan seiring dengan penambahan tekanan. Pemberian tekanan pada penyambungan fiber optik dengan menggunakan berbagai jenis gel menunjukkan bahwa gel yang memiliki nilai keluaran intensitas cahaya terbaik yaitu gel pulpen dengan warna gel kuning. Nilai sensitivitas terbaik pada gel pulpen dengan warna gel kuning pada jarak 0,5 cm dengan gradien sebesar (0,0035 ± 0,0028) dBm/cm. Sedangkan linearitas terbaik terdapat pada jenis gel pulpen dengan warna gel bening pada perlakuan dengan jarak 0 cm yaitu sebesar 0,99919

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.

THE ROLE OF HYDROGEL AND INCUBATION TIME TOWADS PH, C-ORGANIK, AND N-TOTAL SOIL Atih Winingsih; Abraham Suriadikusumah; Oviyanti Mulyani; Anne Nurbaity; Emma Trinuranisofyan
Jurnal Penelitian Saintek Vol 24, No 1: April 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The study was aimed at determining the role of hydrogels and the incubation time on pH, organic C and N-total soil with indicators of sweet corn plants (Zea mays Saccharata Sturt) on Jatinangor inceptisols. The study was conducted from February 2018 to April 2018 at the Ciparanje Experimental Field, Faculty of Agriculture, Padjadjaran University. The study used a Randomized Block Design (RBD) with nine treatments and three replications, consisting of controls; mixed hydrogels and urea incubation and urea only incubation . The parameters observed were pH using the Potentiometric method, C-Organic using the Walkey and Black and N-Total using the Kjeldahl method. The data then were analyzed by variance. Significant testing was conducted to determine the effect of treatment using the Fisher Test at the level of 5%. The results show that there is an effect of hydrogels and the incubation time of hydrogels on pH, organic C and N-total soil. The control treatment shows the highest pH of 6.88. The urea treatment and incubation hydrogel of 20 days shows the highest organic C at 2.80% and the highest N-total is found in the treatment of urea and 40 day incubation hydrogel which is 0.34%.PERAN HIDROGEL DAN WAKTU INKUBASINYA TERHADAP pH, C-ORGANIK, DAN N-TOTAL TANAHPenelitian bertujuan untuk mengetahui peran hidrogel dan waktu inkubasinya terhadap pH, C-organik dan N-total tanah dengan indikator tanaman jagung manis (Zea mays Saccharata Sturt) pada inceptisols Jatinangor. Penelitian dilakukan mulai bulan Februari 2018 hingga April 2018 di Lahan Percobaan Ciparanje Fakultas Pertanian Universitas Padjadjaran. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan sembilan perlakuan dan tiga kali ulangan, yang terdiri atas kontrol; hidrogel dan urea inkubasi serta urea inkubasi. Parameter yang diamati adalah pH dengan menggunakan metode Potensiometri, C-Organik dengan menggunakan metode Walkey and Black dan N-Total dengan menggunakan metode Kjeldahl. Data hasil pengamatan pada penelitian akan dianalisis dengan sidik ragam. Pengujian signifikan untuk mengetahui pengaruh perlakuan digunakan Uji Fisher pada taraf 5%. Hasil penelitian menunjukkan terdapat pengaruh hidrogel dan waktu inkubasi hidrogel terhadap pH, C-organik dan N-total tanah. Perlakuan kontrol menunjukkan pH tertinggi yaitu 6,88. Perlakuan urea dan hidrogel inkubasi 20 hari menunjukkan C-organik tertinggi yaitu 2,80% dan N-total tertinggi yaitu perlakuan urea dan hidrogel inkubasi 40 hari yaitu 0,34%.

THE INFLUENCE OF THE BIOMAS OF MELATI AIR (Echinodorus paleafolius) AND TERATAI (Nyphaea firecrest) ON PHOSPHATE CONTENT, BOD, COD, TSS, AND DEGREE OF MASTER LIQUID WASTE OF LAUNDRY Regina Tutik Padmaningrum; Tien Aminatun; Yuliati Yuliati
Jurnal Penelitian Saintek Vol 19, No 2: Oktober 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Laundry liquid waste containing residual detergent, deodorant, fabric softener, bleach, and methylene blue active compounds degraded difficult and dangerous for the health of the environment. Almost all wastewater is discharged home laundry business through sewers or septitank untreated or diluted beforehand so that would pollute the environment. One way toreduce the chemicals present in the wastewater is to phytoremediation. The study aims to determine the effect of water jasmine and lotus biomass on the content of phosphate, the value of BOD, COD, TSS, and pH of laundry wastewater is treated. The independent variables were the type of biomass (water jasmine, lotus) and time of application of the waste. Dependent variables include phosphate levels, DO, BOD, COD, TSS, and pH. Stages of research include 1) cleaning the roots and stems of water jasmine and lotus plants, 2) the process of acclimatization, 3) the application of the plant for a month, and 4) measurement of the dependent variable. The results showed phytoremediation using water jasmine plants can reduce levels of 172.1748 ppm phosphate, lowering the value of COD is 446.890 mg/L, lower the BOD value of 38.748 mg/L, and the lower the pH by 0.18 units of laundry wastewater, value COD, BOD and lowers the pH of 0.18 units of laundry wastewater. Lotus plant can not be used as a laundry liquid waste processing plants in phytoremediation.

KEANEKARAGAMAN ACARINA DI PUSAT INOVASI AGRO TEKNOLOGI MANGUNAN Soenarwan Hery Poerwanto; Anggun Handiani; Dila Hening Windyaraini
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini dilakukan untuk mengetahui keanekaragaman Acarina dan faktor lingkungan yang mempengaruhi keberadaan Acarina di Pusat Inovasi Agro Teknologi (PIAT) Mangunan, Yogyakarta. Penelitian ini dilakukan di PIAT Mangunan untuk pengambilan sampel dan Laboratorium Sistematika Hewan bagian Parasitologi Fakultas Biologi UGM untuk preparasi dan identifikasi. Metode yang digunakan adalah ekstraksi sampel menggunakan corong Barlese Tullgren dengan beberapa modifikasi. Sampel diambil pada 3 area vegetasi (sirsak, srikaya, dan sawo) dan setiap area diambil lima titik sampling. Pengukuran lingkungan meliputi kelembaban udara dan suhu udara diukur dengan alat higrometer, pH, dan suhu tanah dengan soil tester digital, serta kelembaban tanah dengan soil tester Takemura DM-5. Acarina yang diperoleh dilihat di bawah mikroskop dan di-mounting dengan larutan hoyer’s. Identifikasi Acarina menggunakan buku identifikasi A Manual of Acarology. Data yang diperoleh dari penelitian dianalisis menggunakan indeks keanekaragaman Shannon-Wiener. Berdasarkan identifikasi Acarina yang telah dilakukan, didapatkan 20 Family dan 28 Genus dan 399 cacah individu. Tingkat keanekaragaman Acarina termasuk dalam kategori sedang. Faktor lingkungan yang mempengaruhi kehadiran Acarina adalah suhu dan kelembaban.THE DIVERSITY OF ACARINA IN AGRO TECHNOLOGY INNOVATION CENTER MANGUNANThis study was aimed at determining the diversity of Acarina and environmental factors that affect the existence Acarina at Agro Technology Innovation Center (ATIC) Mangunan, Yogyakarta. This study was conducting at ATIC Mangunan for sampling and the Animal Systematics Laboratory of the Parasitology, Faculty of Biology, Gajah Mada University for preparation and identification. The method used was sample extraction using Barlese Tullgren funnel with several modifications. Samples were taken at 3 vegetation areas (soursop, sarikaya a.k.a Annona squamosa, and sapodilla) and each area was taken five sampling points. The environmental measurements include air humidity and air temperature measured by means of a hygrometer, pH and soil temperature with digital soil tester, and soil moisture with a soil tester Takemura DM-5. Acarina obtained was seen under a microscope and mounted with Hoyer’s solution. The identification of Acarina using identification book A Manual of Acarology. The data obtained from the study were analyzed using the Shannon-Wiener diversity index. Based on Acarina’s identification, 20 families and 28 genera and 399 individual numbers were obtained. The level of diversity of Acarina is categorized as the medium category. The environmental factors that influence the presence of Acarina are temperature and humidity.

MAKING MULTIPLE OF MULTI-POLY CULULOSE COMPOSITE POLYCULOSE FOR SEPARATION OF TEXTILE COLOR DYES Heru Pratomo
Jurnal Penelitian Saintek Vol 10, No 1: April 2005
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The purpose of this work is, to determine the role of supportcomposite polysuljone - cellulose acetate membrane in separating textile dyes. The subject is the textile dyes, and the object is dispersing textile dyes. The solution of the textile dyes (red, yellow and blue) made as wastewater from textile industry. It can be concluded that the support composite polysuljone - cellulose acetate membrane showed good permeability and high permsefectivity in separating textile dyes.

DETERMINATION OF MERCURY AUTHORITY IN WATER, SEDIMENT, AND BLOT A WATER CAPUAS WATER WITH TECHNOLOGY AN NEUTRON ACTIVITY ANALYSIS (APN) Yusman Wiyatmo; Bambang Ruwanto
Jurnal Penelitian Saintek Vol 10, No 2: Oktober 2005
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aim of this research were: 1) to determinate mercury disposition in water, sedimen, and biota in Kapuas river, and 2) to evaluate whether mercury disposition of the sample have been exceeded the threshold value which permitted to be consummed by animal an human. The sample of this research were water, sediment, and biota (algae and fish) in Kapuas river.The research was carried out by experiment with neutron activation analysis (NAA) method The determination of the elements in sample was conducted by gamma spectroscopy. The mercury disposition in sample was determined by comparing the cps of sample and the cps of standard (20 ppm). The results showed that the mercury disposition in water at TPI pier, KPLP pier, Dephub pier, and Kampung Mendawai were 0,25 ppm,0,14 ppm, 0,19 ppm, and 0,09 ppm respectively. The mercury disposition at sediment in TPI pier and Dephub pier were 1.56 ppm0.63 ppm respectively. on the other hand the disposition of the mercury in KPLP pier and Kampung Mendawai were not detectedThe mercury disposition at algae in a cross of Pertamina office, Taman Alun-Alun Kapuas, Kapuas bridge, and near Sudarso hospital were 0,41 ppm, 0,59 ppm. 0.58 ppm, dan 0,68 ppm respectively.Keywords: The mercury disposition, water, sediment, water biota. andNAA.

ACTIVITY AND SELECTIVITY OF Mo-Co/USY CATALYST ON THE HYDRODEOXYGENATION (HDO) REACTION OF ANISOLE Khoirina Dwi Nugrahaningtyas; Yuniawan Hidayat; Prima Susan Prayekti
Jurnal Penelitian Saintek Vol 20, No 1: April 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This research was conducted to study the effect of the catalyst Mo-Co/USY againts product distribution and product conversion, and the effect of addition Co metals towards selectivity-products benzene on the anisole HDO. The anisole HDO was prepared by fl ow reactor. The products were analyzed by GC-MS. The main products of the anisole HDO i.e benzene and toluene. The activity with Mo-Co/USY catalyst higher than USY and termal. Mo-Co/USY B catalyst has highest selectivity-products benzene (15%).

ANALYSIS OF MIX DESIGN BETON HOW DOE (ENGLISH) AND ACI (AMERICA) Agus Santoso
Jurnal Penelitian Saintek Vol 7, No 1: April 2002
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This research was aimed to describe concrete mix design using British DOE and American AC/ methods viewedfrom concrete compressive strength and cost per-m', The mix design research used materials of sand and split from Krasak River, Nusantara brand Portland cement, and ground water from Faculty of Engineering UNY They were 10 samples each methods of (J 5 x15 x 15) em dimension. The data were collected by meant of experiment in the Laboratory of Building Materials, Faculty of Engineering, UNY, and analyzed descriptively. The results were that, to design concrete with K.225 characteristic, the DOE method required mix composition of PC : sand: split = I : 1,58: 3,49 with slump = 13 em, the average weight of concrete cubes = 8,066 kgs and characteristic of compressive strength = 263,1 kg/em". The ACI method required mix composition of PC: sand: split = I: 2,24: 3,12, with slump = tcm (slightly over the design value), the average weight of concrete cubes = 8,215 kgs, and characteristic of compressive strength = 284,73 kg/em', Based on the cost analysis, per-cube, the DOE method cost was Rp 215.906,- and the ACI method cost was Rp 195.791,-.. From the analysis, in general the AC/ method was more effective as well as efficient than DOE method.

THE UTILIZATION OF GLYCEROL, BIODIESEL SIDE PRODUCT OF USED COOKING OIL AS GLYCEROL ACETATE MATERIAL SYNTHESIS Heri Wibowo
Jurnal Penelitian Saintek Vol 20, No 2: Oktober 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The research aimed at using glycerol of biodiesel synthesis side product from used cooking oil as glycerol acetate material synthesis, and charactering synthesized material based on data of IR spectroscopy and GCMS. The method used to synthesize glycerol acetate was reﬂ ux during 50 minute at 80 C. Glycerol from biodiesel synthesis side product from used cooking oil was puriﬁ ed with acetic anhydride reacted at 80 0 C, for 50 minutes. The synthesis product was characterized by IR and GCMS spectroscopies. The result of this research shows that glycerol derived from synthesizing glycerol 1–monoacetate and glycerol 2-monoacetate in the form of yellow liquid with 145 148 0 0 C boiling point, soluble in ethanol and insoluble in n-hexane. IR spectrum shows the presence of C=O carbonyl, C-O ester, -OH, and C-H aliphatic group; GCMS spectrum shows a mixture from two glycerol monoacetate with SI (Similiar Index) of 97 and 93.

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