Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

Jurnal Penelitian Saintek

saintek
Website

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

11 12 13 14 15

EVALUATION OF RADIATION FIELD VERIFICATION IN BREAST CANCER USING INTENSITY MODULATED RADIOTHERAPY TECHNIQUE ON DIFFERENT FRACTIONS Nursama Heru; Abraham Panjaitan
Jurnal Penelitian Saintek Vol 22, No 1: April 2017
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at evaluating radiation field verification in breast cancer using Intensity Modulated Radiotherapy Technique (IMRT) on different fractions. The implementation of IMRT required 3 Dimensional verification processes to ensure the accuracy of the coordinates of the center caused by the shift. To analyze the value of the shift between Treatment Planning and Radiation Treatment, this research was conducted at the Department of Radiotherapy of Siloam TB Simatupang Hospital in February - June of 2017. The design of this study was quantitative descriptive by using 15 samples of breast cancer patients. The data were observed in the form of couch coordinate values X, Y, Z. The verification results using Cone Beam Computed Tomography (CBCT) then were analyzed using statistical test of Non Parametric Wilcoxon Test. The research instruments used were LINAC Varian Trilogy and verification tools On Board Imager CBCT. The result shows that longitudinal couch (coordinate Y) indicated significant differences from the Treatment Planning using Radiation Treatment. While on the lateral couch (X coordinates) and Vertical (coordinate Z) has no significant difference. From the study result, the average value of the verification has exceeded the tolerance standard at coordinate Y with value 0.2cm.

NANOPARTIKEL APPLICATION OF TIN WHITE PRODUCTS AS A MICROSENSOR ETHANOL M. Pranjoto Utomo; Endang Widjayanti LFX; Anti Kolonial Prodjosantoso; Rini Wulandari
Jurnal Penelitian Saintek Vol 18, No 1: April 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk mengetahui karakter SnOz, kemampuan adsorpsi dan kepekaan mikrosensor timah oksida terhadap etanol. Timah oksida (SnOz) disintesis melalui metode sol-gel. Terbentuknya Sn02 dipelajari dengan cara membandingkan difraktrogram Sn02 hasil sintesis dengan difraktogram standar JCPDS. Adsorpsi etanol pada permukaan SnOz dipelajari berdasar spektra FTIR sebelum dan sesudah proses adsorpsi. Daya adsorpsi Sn02 terhadap etanol pada berbagai waktu pemaparan ditentukan dengan menggunakan metode Micro Conway Diffusion. Konduktivitas listrik Sn02 sebelum dan sesudah adsorpsi pada berbagai waktu pemaparan ditentukan berdasarkan resistansi Sn02. Hasil penelitian menunjukkan bahwa Sn02 berhasil disintesis berdasarkan kemiripan puncak pada difraktogram hasil sintesis dengan puncak pada difraktogram standar, yaitu pada 29: 26,48; 33,87; 51,72. Adsorbsi Sn02 terhadap etanol ditunjukkan dengan adanya serapan baru pada 1300-1000 em" (serapan khas gugus -CO). Daya adsorpsi per gram Sn02 pada waktu pemaparan 3, 10, dan 30 menit masing-masing adalah 0,0222 g, 0,0224 g, dan 0,0226 g. Konduktivitas listrik Sn02 sebelum proses adsorpsi adalah 2,042x10-5 S/cm. Konduktivitas SnOz sesudah proses adsorpsi terhadap etanol cair pada waktu pemaparan 3, 5, 10, 20, dan 30 menit secara berurutan adalah 94,783x10-5 , 82,935x10-5 , 66,348x10-5 , 64,730x10-5 dan 63,189x10-5 S/cm. Konduktivitas SnOz terhadap gas etanol pada waktu pemaparan 3, 5 dan 10 menit secara berurutan adalah 0,332xlO-5, 0,295x10-5 dan 0,265x10-5 S/cm.

THE EFFECT OF BIOLOGICAL AND ANORGANIC FERTILIZER TOWARD PHOSPHATE SOLID BACTERIAL POPULATION, THE PLANTS GROWTH, AND PAKCOY USING NUTRIENT FILM Katrina Putri Utami; Mieke Rochimi Setyawati
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (75.428 KB)

Nutrient Film Technique (NFT) is a kind of hydroponic techniques which uses inorganic fertilizer nutrients. The use of inorganic fertilizers can be substituted with biological fertilizers so that they are more environmentally friendly. The research on the combination of biological fertilizers and inorganic fertilizers for pakcoy (Brassica rapa L.) plant. Randomized Block Design (RBD) consisting of four treatments was used in this research. They were 100%, 75%, and 50% inorganic fertilizer and 100% biological fertilizer in three periodical times. This research was carried out in September 2017 to January 2018. The parameters observed in this study included Phosphate Solvent Bacteria (PSB), plant growth and pakcoy plants. The result shows that the provision of inorganic fertilizers and biological fertilizers is able to increase the PSB population, plant height, and pakcoy plants. The combination of 50% inorganic fertilizer and biofertilizer produces the best PSB population, plant height and the best result on pakcoy.PENGARUH PUPUK HAYATI DAN ANORGANIK TERHADAP POPULASI BAKTERI PELARUT FOSFAT, TINGGI TANAMAN, DAN HASIL TANAMAN PAKCOY PADA NUTRIENT FILM TECHNIQUESalah satu teknik hidroponik adalah Nutrient Film Technique (NFT). Sistem hidroponik ini masih menggunakan nutrisi berupa pupuk anorganik. Pemakaian pupuk anorganik dapat disubtitusi dengan pemakaian pupuk hayati sehingga lebih ramah lingkungan. Penelitian kombinasi pupuk hayati dan pupuk anorganik untuk tanaman pakcoy (Brassica rapa L.) pada sistem NFT ini menggunakan Rancangan Acak Kelompok (RAK) yang terdiri atas empat perlakuan yaitu 100%, 75%, dan 50% pupuk anorganik ditambah 100% pupuk hayati diulang tiga kali. Penelitian dilaksanakan pada bulan September 2017 sampai Januari 2018. Parameter yang diamati pada penelitian ini antara lain populasi Bakteri Pelarut Fosfat, tinggi tanaman, dan hasil tanaman pakcoy. Pemberian pupuk anorganik dan pupuk hayati dapat meningkatkan populasi BPF, tinggi tanaman, dan hasil tanaman pakcoy. Kombinasi pupuk anorganik 50% dan pupuk hayati menghasilkan populasi BPF, tinggi tanaman, dan hasil tanaman yang terbaik pada tanaman pakcoy.

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.

THE APPLICATION OF BIORATIONAL PESTICIDES ON PADDY STEM BORER AND BACTERIAL LEAF BLIGHT Yadi - Suryadi
Jurnal Penelitian Saintek Vol 24, No 1: April 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the effectiveness of pheromone traps for controlling yellow paddy stem borer (Scabpophaga. Incertulas) insects and testing the effectiveness of biocontrol agents consisting of a mixture of endophytic bacterial cultures (Bacillus firmus E65 and Burkholderia sp E76) and insect pathogens (Serratia marcescens, SKM) based on kaolin bioformulation to control HDB disease. Tests were carried out on the conditions of farmers’ organic land in Cianjur, West Java by installing pheromones to catch male insects in the experimental plots, and applying kaolin-based biopesticide formulations (2.5 g / L). The results show that the application of pheromone traps by using 100 traps in an area of 10 ha, caused the population of male insects to be caught to decrease by less than 40 moths per month. It also effects stem borers to decrease into zero infestations, while stem borer infestation in plots that are not applied to pheromones show 10% infestation. The effect of bioformulation on non-Sintanur cultivars on other minor pests also decrease compared to controls (cv. Sintanur). Kaolin-based bioformulation shows a decrease in bacterial leaf blight of about 84.7% compared to untreated (without bioformulation) plots.APLIKASI PESTISIDA BIORASIONAL TERHADAP PENGGEREK BATANG DAN HAWAR DAUN BAKTERI PADIPenelitian ini bertujuan untuk mempelajari efektivitas perangkap feromon untuk mengendalikan serangga penggerek batang padi kuning (PBPK) (Scirpophaga. incertulas) dan menguji efektifitas agen biokontrol yang terdiri atas campuran kultur bakteri endofitik (Bacillus firmus E65 and Burkholderia sp E76) dan patogen serangga (Serratia marcescens, SKM) berbasis bioformulasi kaolin untuk mengendalikan penyakit HDB. Pengujian dilakukan pada kondisi lahan organik petani di Cianjur Jawa Barat dengan cara memasang feromon untuk menangkap serangga jantan pada petak percobaan, dan melakukan aplikasi formulasi biopestisida berbasis kaolin (2,5 g/L). Hasil penelitian menunjukkan bahwa aplikasi perangkap feromon dengan mengguna-kan 100 perangkap pada area seluas 10 Ha, menyebabkan populasi serangga jantan yang tertangkap menurun kurang dari 40 ngengat per bulan, dan serangan hama penggerek batang juga menurun menjadi nol infestasi, sementara serangan hama penggerek batang pada petak yang tidak diaplikasi feromon menunjukkan 10% infestasi. Pengaruh bioformulasi pada kultivar non-Sintanur terhadap hama minor lainnya juga menurun dibandingkan dengan kontrol (cv. Sintanur). Bioformulasi berbasis kaolin menunjukkan penurunan penyakit hawar daun bakteri sekitar 84,7% dibandingkan dengan petak tanpa perlakuan (tanpa bioformulasi).

KINETICS AND BALANCE ADSORPSI ION KROMIUM (III) IN SOLUTIONS ON SILICA AND COMPOUND MODIFICATION OF SILICA RESULTS SYNTHESIS FROM GREEN RICE DRINKS Siti Sulastri; Nuryono Nuryono; Indriana Kartini; Eko Sri Kunarti
Jurnal Penelitian Saintek Vol 19, No 2: Oktober 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study will examine the nature of silica and modified silica in the interaction with Cr (III) ion as an adsorbate. Properties that will be studied are kinetics and equilibrium of Cr (III) adsorption in solution. Studies begins with determining the existence of Cr (III) ion in solution at various pH values, the presence of adsorbent at various pH values, and the adsorption of Cr (III) ion in solution by the adsorbent at various pH values. Based on this data set also can determined some values, e.g the maximum adsorption capacity (notated as Qmax), and the equilibrium constant, the RL value that determined the nature of adsorption were favorable or not favorable. Similarly to the Freundlich isotherm. Adsorption kinetic and equilibrium were performed at pH 5. Each adsorbent has a different kinetic model. All of adsorbents has compatibility with Langmuir 2 isotherm model, and on these condition had favorable adsorption of Cr (III) ion. The highest Qmax value is at HSSN. In the Freundlich isotherm model can be stated that all of the adsorbent is favorable for the adsorption process of Cr (III) ion in solution..

RESPONS FISIOLOGIS DAN ANATOMI AKAR TANAMAN BAYAM (Amaranthus tricolor L.) TERHADAP CEKAMAN NaCl Ian Prabowo; Diah Rachmawati
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Tujuan dari penelitian ini untuk mengetahui pengaruh cekaman NaCl terhadap pertumbuhan dan anatomi akar tanaman bayam serta mengetahui konsentrasi NaCl yang dapat menghambat pertumbuhan tanaman bayam. Penelitian ini digunakan perlakuan NaCl sebanyak 0, 200, 400, 600 dan 800 mM pada tanaman bayam (Amaranthus tricolor L.), Media tanam berupa campuran tanah dan pupuk kandang dan alkohol, safranin, aseton. Alat yang digunakan adalah med line, cawan poerslen, spektrofotometer dan mikroskop. Parameter yang diukur meliputi tinggi tanaman, jumlah daun, warna daun, panjang akar, jumlah akar, berat basah, berat kering, kadar klorofil, tebal epidermis akar, tebal korteks akar dan diameter stele akar. Data dianalisis dengan uji ANOVA dilanjutkan dengan DMRT taraf kepercayaan 95% menggunakan program SPSS 15. Hasil yang diperoleh menunjukkan penambahan NaCl menyebabkan penurunan pertumbuhan tanaman bayam meliputi tinggi tanaman, jumlah daun, kadar klorofil, rasio tajuk dibanding akar dan menurunkan diameter stele akar. Pertumbuhan tanaman menurun seiring peningkatan konsentrasi NaCl karena NaCl menyebabkan cekaman osmotik yang menghambat penyerapan air dan unsur hara yang diperlukan tanaman untuk proses metabolisme.PHYSIOLOGICAL RESPONSE AND ANATOMY OF ROOTY PLANT [ Amaranthus tricolor L.] AGAINST NaClThe study was aimed at determining the effect of NaCl stress on the growth and anatomy of spinach roots and the concentration of NaCl which can inhibit the growth of spinach plants. This study used 0, 200, 400, 600 and 800 mM NaCl treatments on spinach (Amaranthus tricolor L.), planting media in the form of a mixture of soil and manure and alcohol, safranin, acetone. Med line, poerslen cup, spectrophotometer, and microscope were used in this study. The parameters measured plant height, number of leaves, leaf color, root length, number of roots, wet weight, dry weight, chlorophyll content, root epidermis thickness, root cortex thickness, and root stele diameter. The collected data then were analyzed by ANOVA test followed by DMRT 95% confidence level using the SPSS 15 program. The results obtained showed that the addition of NaCl caused a decrease in spinach plant growth including plant height, the number of leaves, chlorophyll content, the ratio of the crown to root and decreased diameter of root stele. Plant growth decreases with increasing NaCl concentration since NaCl causes osmotic stress. This stress inhibits the absorption of water and nutrients needed by plants for metabolic processes.

ANALYSIS OF ELECTRONIC MATERIAL USE OF BASIC MATERIALS, IN EMS STEEL EDM PROCESS 45 REVIEWED FROM THE ASPECTS OF ELECTRODES OF MASS REDUCTION AND SURFACE DAMAGE Tiwan Tiwan
Jurnal Penelitian Saintek Vol 12, No 1: April 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aim pf this research is to analyze characteristic of Cu-based material that has been used as electrode in EDM process. The research variables are wearness off electrode, weightloss and roughness of specimens of EMS 45 steel.Experimental methode was used in this research, which consists of preparation process and EDM test, EDM process, characterization and testingprocess. Analysis was done based on characterization and testing process. Testing process comprises electrode wearness, weightloss and roughness of the specimen.The result show that wearness of brass electrode is higher than bronze electrode. However, bronze electrode gives rapid weight loss. At current of 45 A and pulse on time 3 s, weight loss of EMS 45 steel was1,8 timefaster using bronze electrode, but wearness of brass electrode was 18,67 times faster. Surface roughness of EMS 45 steel was smoother using bronze electrode. Weight loss of EMS 45 steel and electrode wearness affected by current andpulse on time. Nevertheles, surface roughness of EMS 45 influenced by current, but not bypulse on time.

STATEMENT OF MECHANICAL PROPERTIES OF MATERIALS WHICH HAVE ANALYZED Edi Istiyono
Jurnal Penelitian Saintek Vol 11, No 1: April 2006
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The experiment purposes to observe 0(' (1) the influence of temperatureto the [ensile strength of material. (2) the influence of anneal lime to the tensile strength of material. (3) the influence (if temperature to the torsion modulus (if material, (4) the irfluence (if anneal lime to the torsion modulus of material. and (5j discover the material that has optimum of tensile strength and torsion modulus.Sample of the experiment is win! of ion. steel and copper which areannealed 011 temperature of 15()°C, 25{)°C, 350°C, 45()"C, 550"C,650"C. 750°C. 850°C, and 950°Cfor 30 minutes. Besides. the wires are annealed on temperature 350°Cfor 30.60, 9().120. 150. IBO. ]J() and240 minutes. The tensile strength of materials is measured with atensometer. Tension modulus of materials is measured with tension modulus meter.Based on data analysis is concluded thai. ( l ) Increasing of thetemperature anneal causes decreasing of ttle tensile strength of the materials. (2) increasing of the time anneal causes decreasing of the tensile strength (if the materials. (3) increasing (if the temperature anneal causes decreasing of the torsion modulus of the materials. (-/) increasing of the anneal time causes decreasing of the torsion modulus of the materials. and (5) the optimum tensile strength is the steel which anneal temperature of 450°C and anneal time (if 30 minutes. The optimum torsion modulus is iron, which is not annealed.

SYNTHESIS GLYCEROL STEARATE OF STEARIC ACID WITH GLYCEROL BY PRODUCT OF BIODISEL FROM USED COOKING OIL Ika Rosdiani; Sri Atun
Jurnal Penelitian Saintek Vol 20, No 1: April 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aim of this research is to synthesis glycerol stearate compound from stearic acid with glycerol by product of biodiesel from used cooking oil, and to determine of product using IR and GC-MS spectroscopy. Method of the research was esterifi cation of glycerol and stearic acid with concentrated HCl as catalyst, by refl uct at 120-160 0C for 8 hours. The result was recrystallized by n hexan. The compound characterized by using IR spectroscopy and GC-MS spectroscopy. The compound has solid form, white to yellowish colour and has 58- 59 0C melting point value with rendement 80.53%. IR spectrum showed the presence C=O carbonil, C-O ester, -OH and C-H aliphatic group. The result of GC-MS analysis showed the compound which have synthesized has similarities with glycerol 2-monostearate with similarity index (SI) of 88% with a purity of 98,94%.

Page 13 of 29 | Total Record : 286

11 12 13 14 15

Filter by Year

2001 2025

Filter By Issues

All Issue Vol 30, No 2 (2025) Vol 30, No 1 (2025) Vol 29, No 2 (2024) Vol 29, No 1 (2024) Vol 28, No 2 (2023) Vol 28, No 1 (2023) Vol 27, No 2 (2022) Vol 27, No 1 (2022) Vol 26, No 2 (2021) Vol 26, No 1 (2021) Vol 25, No 2 (2020) Vol 25, No 1 (2020) Vol 24, No 2: Oktober 2019 Vol 24, No 1: April 2019 Vol 23, No 1 (2018): April 2018 Vol 23, No 2: Oktober 2018 Vol 22, No 2: Oktober 2017 Vol 22, No 1: April 2017 Vol 21, No 2: Oktober 2016 Vol 21, No 1: April 2016 Vol 20, No 2: Oktober 2015 Vol 20, No 1: April 2015 Vol 19, No 2: Oktober 2014 Vol 19, No 1: April 2014 Vol 18, No 2: Oktober 2013 Vol 18, No 1: April 2013 Vol 17, No 1: April 2012 Vol 16, No 2: Oktober 2011 Vol 16, No 1: April 2011 Vol 15, No 2: Oktober 2010 Vol 15, No 1: April 2010 Vol 14, No 1: April 2009 Vol 13, No 1: April 2008 Vol 12, No 2: Oktober 2007 Vol 12, No 1: April 2007 Vol 11, No 1: April 2006 Vol 10, No 2: Oktober 2005 Vol 10, No 1: April 2005 Vol 9, No 1: April 2004 Vol 8, No 2: Oktober 2003 Vol 8, No 1: April 2003 Vol 7, No 2: Oktober 2002 Vol 7, No 1: April 2002 Vol 6, No 1: Saintek 2001 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email -

Phone -

Journal Mail Official -

Editorial Address -

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA