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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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TEST OF ACTIVITY OF BIOACTIVE COMPOUNDS IN EXTRACT FRACTION METHANOL SARGASSUM SP (ALGA CHOCOLATE) AS ANTI HEPATOTOKSIK Nurfina Aznam; Sri Atun; Susila Kristianingrum
Jurnal Penelitian Saintek Vol 6, No 1: Saintek 2001
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objectives of this research are to identify whether the bioactivecompound of methanol fraction extracts of Sargasum sp can be used as anti hepatotoxic and to determine the dose of such compound in order that it may be used as anti hepatotoxic. The population used in this research was 2-month male white rats with almost similar weight. 39 rats were taken for the samples. Treating CCl4 injection carried out the bioactive compound activity test and the treatment of these compound extracts was observed by examining the liver cell damage microscopically and analyzing the GPT content. Examination was a/so conducted to the control rats (without CCI4 injection and bioactive compound treatment). From the result of the research it can be concluded that methanol fraction extract of Sargasum sp may be used as anti hepatotoxic. It wasfound that the bioactive compound activity appeared at the dose of 500 mglkg of weight with 5 times treatments.

UTILIZATION OF COPPER WEIGHT METAL ION (II), KROMIUM (III), TIMBAL (II), AND SENG (II) IN LIQUID WASTE INDUSTRY FOR ELECTROPLATING IRON COATING Siti Marwati; Regina Tutik Padmaningrum; Marfuatun Marfuatun
Jurnal Penelitian Saintek Vol 14, No 1: April 2009
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This Research aim to know: 1) the potential difference which can degrade the heavy metal ion concentration of Cu(II), Cr(III), Pb(II), and Zn(II) in liquid waste of electroplating maximally, 2) the efficiency of degradation of heavy metal ions concentration of Cu(II), Cr(III), Pb(II), and Zn(II) in liquid waste of electroplating at optimal potential difference, and 3)the potential difference yielding the nicest coat quality pursuant to its physical appearance.This research early with the preparation electroplating: 1) the preparation of sample liquid waste, 2) platinum electrode,and 3) iron metal to be arranged in layers. The instrument of this research is potentiometers Shimadzu NES_5F. Process the electroplating has been done at variations of potential difference that are 2.0; 2.5; 3.0; 3.5; 4.;, 4.5; and 5.0 V. Analysis of concentration of metal ions in liquid waste of electroplating before and hereafter process the electroplating have been done by atomic absorbtion spectrophotometric (AAS). Perception result of coating have been done visually by researcher. The result of this research are 1) the potential differences which can degrade the heavy metal ions concentration of Cu(II), Cr(III), Pb(II), and Zn(II) in liquid waste of electroplating maximally is 4 V, 2) efficiency of degradation of heavy metal ions concentration of Cu(II), Cr(II), Pb(II), and Zn(II) in liquid waste of electroplating at optimal potential difference successively are 21.30; 72.37; 51.00; and 58.60 %, and 3) potential difference yielding the nicest coat quality pursuant to its physical appearance is 4 V.

NITROGEN ADSORPTION OF URINE WITH ZEOLITE M.Pranjoto Utomo; Endang Widjajanti; Kun Sri Budiasih
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Tlte aints of the research v,ere to determine the nitrogen contained in humatt ttrine before and after ipplying zealyte ancl to determine the influence o.f MgO to nitrog'n contained in human urine. The tJetermination ofZeolyte aclsorptio capacity' to nitrogen contained in htrmqn trrine inclLtcled 3 s'teps. Activation ol' nature zeolf ie'nitrogen adsorptiort' Iotal nin"ogen determination Ly Kjeclahl test. Zeolyte activation wqs done by soaking zeollte itio0' 1 14 HCl, HNO: and H2soafor I hour and calcin(ltedJbr t hours at 100"c. The adsorption proses adding y,as clone byaicting inactivated ancl activated zeolyte tuithand without MgOThe iptimunt mass of zeolyte was 3 grants. The adsorption capacities oJ' inactivated zeolytes u,ithoutAnd with LttgO adcting were 0.00780994 and 0.0102% pq grdm zeolyte, respectivety. The adsorptionCapacities of activated zeoll'te by HCl, HNO: dan H:SO| wiihout Mgo addingw)re 0.00i01%,0.006610.4, and 0a0917?i, per gram:eolil'te. Lhe adsorption capacities of activated zeolyle by HCl, HNO j dan H2SO| v'i* )IgO udding were 0.00839%,0.0i01% dan 0.011% per gram zeoll'te. The activation and lulgO adr)ing increasecl the aclsorption capacitl' oJ' zeolyte to nitrogen contained in httman urine.

THE SEISMIC CHARACTERISTICS OF NORTHERN PART OF KULONPROGO Bambang Ruwantro; Yosaphat Sumardi; Denny Darmawan
Jurnal Penelitian Saintek Vol 21, No 1: April 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Microtremor signal measurements had been conducted in the northern part of Kulonprogro to obtain the seismic characteristics in the form of: the predominant frequency value, ampliﬁ cation factor, sediment thickness, seismic vulnerability index, the maximum ground vibration acceleration, and the ground shear strain value. The measurement was conducted at 18 points within geographical coordinates of 110.10° E-110.27° E and 7.64° S-7.80° S. The signals were analyzed using Horizontal to Vertical Spectral Ratio (HVSR) method. The results show that the predominant frequency value is in the range of 2.98-13.53 Hz; ampliﬁ cation factor is in the range of 1.6-10.1; sediment thickness is in the range of 5-60 m; seismic vulnerability index is in the range of 0.6 × 10 -6-5.8 × 10 -6 s /cm; maximum ground acceleration is in the range of 24-54 gal and ground shear strain value is in the range of 0.6 × 10 -4 – 4.4 × 10 -4.

DEVELOPMENT OF LOAD STEPS COMPOSTING SYSTEM STOMPS "WINDROW MODEL" WITH ADDITION OF VULKANIC ABU ERUPSI MERAPI Satino Satino; Sudarsono Sudarsono; Suhartini Suhartini
Jurnal Penelitian Saintek Vol 17, No 1: April 2012
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk mengetahui kecepatan proses pengomposan, kualitas fisik, kemik serta biologik kompos sampah daun hasil proses pengomposan melalui sistem pengomposan sampah daun di UNY dengan penambahan bahan aditif berupa abu vulkanik merapi. Pengomposan dilakukan menggunakan sistem tumpukan (heap methode) dengan mengembangkan ″Model Windrow″. Substrat organik dikomposkan dalam kotak-kotak pengomposan dengan volume cukup banyak, disusun menyerupai tumpukan dan dibiarkan terbuka. Bahan yang dikomposkan disusun berdasarkan komponen karbon (C) dan Nitrogen (N) kemudian ditambah komponen abu vulkanik merapi (mineral). Besarnya tumpukan adalah 1,5 m x 2 m x1 m (lebar x panjang x tinggi). Parameter yang diamati dan diukur adalah kecepatan dekomposisi sampah daun yang diketahui dari hasil analisis kimiawi dan profil temperatur. Karakteristik kimiawi meliputi kandungan bahan organik, kadar air, C-organik, unsur-unsur makro, unsur mikro dan mineral khusus. Parameter biologik dilihat dari pengaruhnya terhadap pertumbuhan tanaman muda serta perkecambahan. Hasil penelitian menunjukkan bahwa penambahan abu vulkanik dapat mempercepat proses pengomposan. Kompos yang dihasilkan tidak berbeda dengan pengomposan daun tanpa penambahan abu fulkanik merapi. Ratio C/N yang dihasilkan lebih baik dibanding dengan pengomposan daun tanpa penambahan abu fulkanik merapi.Kata kunci: pengomposan, model windrow, dan abu vulkanik

SYNTHESIS OF 2-(3'-HYDROXYBENZYLIDENE)CYCLOHEXANONE VIA CLAISEN-SCHMIDT REACTION BETWEEN 3-HYDROXYBENZALDEHYDE AND CYCLOHEXANONE USING MAOS METHOD Asiah Nurul; Sri Handayani
Jurnal Penelitian Saintek Vol 22, No 2: Oktober 2017
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Synthesis of 2-(3'-hydroxybenzylidene)cyclohexanone via Claisen-Schmidt reaction between 3-hydroxybenzaldehyde and cyclohexanone used MAOS method has been done. The aim of this research was determined the yield of the 2-(3'-hydroxybenzylidene)cyclohexanone and identified the side product. 2-(3'-hydroxybenzylidene)cyclohexanone compound was sythesized through Claisen-Schmidt reaction between 3-hydroxybenzaldehyde and cyclohexanone. Synthesis of 2-(3'-hydroxybenzylidene)cyclohexanone used NaOH as catalyst by MAOS method for 500 seconds. The synthesis product were identified using TLC, TLC scanner, FTIR, and GCMS. Result of this research show that the yield of 2-(3'-hydroxybenzylidene)-cyclohexanone is 7.37%. The side product are 2-cyclohexylidenecyclohexanone and 2-(3'-hydroxy-benzylidene)-6-cyclohexylidenecyclohexanone.

SITRONELAL CYCLE-HYDROGENATION TANDEM CREATED ZrO MONTMORILLONIT WITH VARIATION METHOD REACTION Is Fatimah; Septian Perwira Yudha; Dwiarso Rubiyanto; Thorikul Huda
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Tandem cyclization reaction towards menthol-citronellal hydrogenation reactions through one-step reaction with a variety of methods using pillared montmorillonite catalyst ZrO2 (Zr-MMT) have been done. The research aimed to determine the effectiveness of Zr-MMT catalyst in the reaction process with two different methods; first method comprises reacting flow system to citronellal - catalyst mixture after reflux with pressure and flow H2 of 3 kPa, and the other method consists of a flow system to the citronellal -catalyst mixture at the temperature of 200o C with H2 flow pressure of 2 kPa. Reaction products were analyzed using GC-MS to determine the total conversion and product yield of menthol. The results showed that the different methods give different reaction mechanisms significantly. The first method gives almost to 99% conversion of citronellal with major products of isomenthone and isopulegol while the second method give the conversion of 5.18% with 0.39% selectivity to menthol products. Compared with natural montmorillonite, both processes showed higher conversion in which the conversion of citronellal over montmorillonite give the concersion less than 5%. The adequacy of H2 flow rate as a reactant is an important factor affection the mechanism is discussed in this paper.

THE EFFECT OF BOKASHI FERTILIZER AND COATING SEEDS TOWARD THE SEED VIGOR AND SOYBEAN GROWTH Dilla Nitra Gustiana; Sumadi Sumadi; Erni Suminar
Jurnal Penelitian Saintek Vol 23, No 2: Oktober 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed atdetermining the dosage of bokashi fertilizer and seed coating which can have an influence both on seed vigor and soybean growth. The experimental design used was Factorial Randomized Group Design consisting of two factors, namely the administration of three levels of bokashi fertilizer and seed coating with Thiamethoxam and Trichoderma which consisted of five levels. The combination of the two factors contained 15 treatments which were repeated three times. DSAASTAT application was used in the further testing. The implementation of the research includes: power testing, weighing, seed vigor test, land preparation, application of bokashi fertilizer, planting, maintenance, destruction, main observations and supporting observations. The results showed that there was no effect of interaction between bokashi fertilizer and seed coating on seed vigor and growth of Anjasmoro cultivar soybeans. Giving 300 g / polybag of bokashi fertilizer can increase soybean plant growth. Coating with Trichoderma sp. 1 g / 100 seeds is the best dose of seed vigor, but the treatment without seed coating is not significantly different from other seed coating treatmentsPENGARUH PUPUK BOKASHI DAN PELAPISAN BENIH TERHADAP VIGOR BIBIT DAN PERTUMBUHAN KEDELAIPenelitian ini bertujuan untuk menentukan dosis pupuk bokashi dan pelapisan benih yang dapat memberikan pengaruh baik pada vigor bibit dan pertumbuhan kedelai. Rancangan percobaan yang digunakan yaitu Rancangan Acak Kelompok Faktorial yang terdiri dari dua faktor yaitu pemberian pupuk bokashi tiga taraf dan pelapisan benih dengan Thiamethoxam dan Trichoderma sp. yang terdiri dari lima taraf. Kombinasi dari kedua faktor terdapat 15 perlakuan yang diulang tiga kali. Uji lanjut menggunakan aplikasi DSAASTAT. Pelaksanaan penelitian meliputi:uji daya, penimbangan, uji vigor bibit, persiapan lahan, aplikasi pupuk bokashi, penanaman, pemeliharaan, destruksi, pengamatan utama, dan pengamatan penunjang. Hasil penelitian menunjukkan bahwa tidak ada pengaruh interaksi antara pemberian pupuk bokashi dan pelapisan benih terhadap vigor bibit dan pertumbuhan kedelai kultivar Anjasmoro. Pemberian pupuk bokashi osis 300 g/polybag dapat meningkatkan pertumbuhan tanaman kedelai. Pelapisan dengan Trichoderma sp. 1 g/100 butir benih merupakan dosis terbaik terhadap vigor bibit. Namun, perlakuan tanpa pelapisan benih tidak berbeda nyata dengan perlakuan pelapisan benih lainnya.

INCREASING CAROTEN IN SWEET BREAD WITH PUREE SUBSTITUTION OF ORANYE ORDER PALM IN WHEAT FLOUR Ichda Chayati
Jurnal Penelitian Saintek Vol 16, No 2: Oktober 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objectives of this study were to investigate : 1) the process for making orange-fleshed sweet potato puree, 2) substitution of orange-fleshed sweet potato puree to wheat flour in bread making, 3) evaluation of consumer preference to bread of orange-fleshed sweet potato puree (roti manis puree ubi jalar oranye-RMP), 4) total carotene changes during RMP making, 5) total carotene and texture differences between bread (roti manis standar-RMS) and RMP, and 6) economic liability of RMP. Hedonic test was carried out by preference test using 80 panelists. Moisture content was analyzed using gravimetric method, texture was analyzed using Lloyd, and total carotene content was analyzed using spectrophotometer method. Research design was completely randomized design, duplicate samples and triplicate analysis. One way anova was carried out to analyze data of total carotene and followed by LSD test, while t-test was carried out to determine significant differences of total carotene and texture between RMS and RMP. P values 0.05 were considered statistically significant. Economic liability was determined using price and BEP. Results showed that: 1) processing steps for making puree were cleaning, steaming, peeling, and mashing, 2) maximal incorporation of puree for making RMP was 60%, 3) consumer preference to RMP 60% was the same as to RMP 40 and 50%, 4) total 13 110 carotene decreased 37,9% during RMP making, 5) total carotene of RMP was higher than RMS, while the texture was softer, and 6) RMP was economically liable.

EFFECT OF INOCULANT AND RAMIE COMPOST ON EFFICIENCY DEGRADATION HIDROCARBON, POPULATION TOTAL FUNGI AND RAMIE Yuhanidz Yuhanidz; Pudjawati Suryatmana; Betty Natalie Fitriatin
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 effect of ramie, ramie compost and types of inoculants on the efficiency of hydrocarbon degradation, total fungi population, and ramie height. The study was conducted using factorial RAK with 2 factors. The calculation of the total population of Aspergillus niger was done using the total plate count (TPC) method, while the measurement of total petroleum hydrocarbons (TPH) levels used the gravimetric method. The experiment was conducted at the Greenhouse of the Faculty of Agriculture, Padjadjaran University, Jatinangor, West Java with an altitude of 822 meters above sea level. Soil analysis was carried out at the Soil Fertility and Plant Nutrition Laboratory and the Soil Biology Laboratory, Faculty of Agriculture, Padjadjaran University. The experiment was conducted from November 2017 to February 2018. The results of the study do not show an interaction between inoculants and ramie compost on the efficiency of degradation, total fungi population and ramie height in the phytoremediation process of petroleum waste. The results also showed that there was no best type of inoculant and ramie compost dose for degradation efficiency, total fungi population and ramie height in phytoremediation of petroleum waste.PENGARUH INOKULAN DAN KOMPOS RAMI TERHADAP EFISIENSI DEGRADASI HIDROKARBON, POPULASI TOTAL FUNGI DAN TINGGI RAMI Penelitian ini bertujuan untuk mengetahui pengaruh rami, kompos rami, dan jenis inokulan terhadap efisiensi degradasi hidrokarbon, populasi total fungi dan tinggi tanaman rami. Penelitian dilakukan dengan menggunakan RAK faktorial dengan 2 Faktor. Perhitungan populasi total Aspergillus niger dilakukan dengan menggunakan metode total plate count (TPC), sedangkan pengukuran kadar total petroleum hydrocarbons (TPH) menggunakan metode gravimetri. Percobaan dilaksanakan di Rumah Kaca Fakultas Pertanian Universitas Padjadjaran Jatinangor, Kabupaten Sumedang, Provinsi Jawa Barat dengan ketinggian 822 mdpl. Analisis tanah dilakukan di Laboratorium Kesuburan Tanah dan Nutrisi Tanaman dan Laboratorium Biologi Tanah Fakultas Pertanian Universitas Padjadjaran. Percobaan dilaksanakan dari bulan November 2017 sampai dengan bulan Februari 2018. Hasil penelitian tidak menunjukkan adanya interaksi antara inokulan dan kompos rami terhadap efisiensi degradasi, populasi total fungi dan tinggi tanaman rami pada proses fitoremediasi limbah minyak bumi, serta tidak diperoleh jenis inokulan dan dosis kompos rami terbaik terhadap efisiensi degradasi, populasi total fungi, dan tinggi tanaman rami pada fitoremediasi limbah minyak bumi.

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