cover
Article Per Year (5 Year)
All
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
Jurnal Penelitian Saintek
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
 14   15   16   17   18 
THE EFFECT OF OPENING TYPE ON THERMAL CONVENIENCE OF THE OLD AND NEW BUILDING CLASSROOM Ali Anton Senoaji; Arif Kusumawanto; Sentagi Sesotya Utami
Jurnal Penelitian Saintek Vol 24, No 2: Oktober 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (24.683 KB) | DOI: 10.21831/jps.v24i2.25788

Abstract

This study was aimed at analyzing the effect of opening type on the thermal convenience of classrooms in old and new buildings at SMK Negeri 3 Yogyakarta. This study used a qualitative comparative method and the simulation of IES VE 2018. The field air measurement is carried out at 10 measurement points and 5 measurement points in each class, with a height of 1.5 m. Field measurements were carried out in March 2019, at 06.30-16.30 WIB. The parameters used in the study were air temperature, humidity and wind speed. Air temperature and humidity were measured using a Thermo hygrometer. Wind speed was measured using an anemometer. The data collection method is carried out by observation and measurement. Root Mean Squared Error (RMSE) was used to validate the data. The results show the best thermal convenience of the classroom was obtained during the simulation using the type of Windows Awning, with a full aperture area. Simulation results show a comfortable distribution of airflow in the classroom at wind speeds above 0.15-0.28 m/sec, Temperature 25.07-27.10oC.PENGARUH TIPE BUKAAN TERHADAP KENYAMANAN TERMAL RUANG KELAS BANGUNAN LAMA DAN BARU Tujuan dari penelitian yaitu menganalisis pengaruh bukaan terhadap kenyamanan termal ruang kelas pada bangunan lama dan baru, di SMK Negeri 3 Yogyakarta. Penelitian ini menggunakan metode komparatif kualitatif yaitu dan hasil simulasi IES VE 2018. Pengukuran udara luar dilakukan pada 10 titik pengukuran dan sebanyak 5 titik pengukuran disetiap kelasnya, dengan ketinggian 1,5 m. Pengukuran lapangan dilakukan pada bulan Maret tahun 2019, waktu 06.30-16.30 WIB. Parameter yang digunakan dalam penelitian yaitu temperatur udara, kelembaban dan kecepatan angin. Temperatur udara dan kelembaban diukur dengan menggunakan alat thermo hygrometer. Kecepatan angin diukur dengan menggunakan alat anemometer. Metode pengumpulan data dilakukan dengan metode pengamatan dan pengukuran. Validasi data menggunakan Root Mean Squared Error (RMSE). Hasil penelitian menunjukkan kenyamanan termal ruang kelas terbaik diperoleh pada saat simulasi menggunakan tipe bukaan ke atas atau Awning Windows, dengan area bukaan penuh. Hasil simulasi menunjukkan distribusi aliran udara yang nyaman di dalam ruang kelas pada kecepatan angin di atas 0,15-0,28 m/det, Temperatur 25,07 -27,10o C. 
ANALYSIS OF EFFECT OF SPEED SPEED AND PHYSICAL EXPERIENCE ON PAINTING TEMPERATURE ON LATHE MACHINE Didik Nurhadiyanto
Jurnal Penelitian Saintek Vol 7, No 1: April 2002
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3565.495 KB) | DOI: 10.21831/jps.v7i1.5563

Abstract

The propose  of this experiment was to analyze the effect of feedingspeed and cutting depth that effecting cutter temperature. The scatter diagram and variant analysis was used to analyze the data of thisexperiment. The analysis shows that both feeding  speed and cutting depth were influencing cutter temperature. The effect of interaction between feeding  speed  and  cutting  depth  were  influencing  cutter temperature.
EFFECT OF WOOD-LOAD WOOD-LOADING PROCEDURES (Manihot esculenta Crantz) ON PADI CONTENT AND QUALITY OF UVAN WOOD FLOUR Wika Rinawati
Jurnal Penelitian Saintek Vol 8, No 2: Oktober 2003
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7549.569 KB) | DOI: 10.21831/jps.v8i2.5475

Abstract

This research is about flouring procedures,  which do with three ways.First  (grating  and  drying).  Second  (grating,  parting   of  starch  and waster). Third (grating and drying of waster). Goals from  this research are: 1) to know cassava's flour  starch  based on difference of flouring procedure 1, II,  and 111,2)  to know about impact of flouring procedure difference 1, 11,   and 111on cassava's flour  starch  compared with fresh cassava, and 3) to know the impact of flouring procedure difference 1, 11 and 111on quality (colour and smell) cassava's flour.  Research were did at  Food   Biochemical  Laboratory   Farm   Technology  Gadjah   Mada University  to  analyze flour   and  Culinary  Laboratory,  Family  Life Education, Technique Faculty, Yogyakarta State University, where flour product  was made. Research start  with make  a starch  with starching procedure  1, 11,    and  111 and  continued  with  analyzing  cassava  and sensoric test of cassava's flour quality which depend on colour and smell. The research show that: 1) cassava's flour  starch in 1 way 86.69%, 11is87.94%,  111 is  87.I4%.  2)  there  is  impact  of flouring  procedure  on cassava's flour starch compared with fresh starch. There is no difference impact offlouring procedure 1, II, and IlIon  cassava's starch flour at 1% significantly.  3)  There is  impact on flouring  procedure   difference  on colour and smell cassava's flour at 1% significantly.
EFFECT OF MALELO SANDAL SALT WITH HN03 TO THE EFFICIENCY OF CRYSTAL IMPLEMENTATION Siti Sulastri; Susila Kristianingrum; Retno Arianingrum
Jurnal Penelitian Saintek Vol 9, No 1: April 2004
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12814.019 KB) | DOI: 10.21831/jps.v9i1.5553

Abstract

The  objective   of  this  study   was  to  investigate    the  effect  of  soaking nitrate  acid  of Malelo  sand  to adsorption   efficiency   of chromium  (Cr). The Malelo  sand  was prepared   by soaking   in nitric  acid with variation of  concentration     were   17,5:  35  and   70%  for    24  hours   at  room temperature.    The  adsorption   efficiency   of  chromium   was  determined based  on concentration    of chromium   residue   after  adsorption.   which measured  using Atomic Absorption  Spectrophotometer    (AAS). The characterization    of Malelo  sand  determined   using  FTIR  and XRD.  The result  indicated  that the mean  ofadsorption    efficiency   of chromium  on Malelo   sand   without   preparation    and  soaking   in  nitrate   acid  with variation   concentration    17.5:  35 and  70%  were  91,36:  92,40:  92,72 and 94,004%  respectively.
EVALUATION OF YIELD SEDIMENT IN FLOW AREA RIVER RIVER PART IN ESTABLISHING THE REST OF DADMA WAREHOUSE Muhammad Nursa'ban
Jurnal Penelitian Saintek Vol 13, No 1: April 2008
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (137.788 KB) | DOI: 10.21831/jps.v13i1.182

Abstract

The objective of this research are to: 1). Knowing the level of erosion that happened in the upstream of Cisanggarung Catchments' area. 2). Knowing the level of Sediment Yield in Darma reservoir. 3). Determining the estimation age left Darma reservoir.This is the explorative research. Data collecting was conducted with observation method and documentation. Calculating of total erosion summing factors from surface erosion with dale erosion and channel erosion which level of is 25% from surface land;ground erosion that is using Universal approach [of] Soil Loss Equation ( USLE), while calculation of total erosion that is factor losing of land;ground. Erosion enabled to be to be analysed by conversion each;every land;ground erosion criterion enabled with tables guidance of stipulating of value of T for land;ground in Indonesia, is later;then multiplied 10 and land;ground volume weight. Analyse Sediment Yield [counted/calculated] high [of] water [at] highest terendah level until, river stream debit when different, and high [relation/link] and debit irrigate to adrift sediment ( Load Suspended) and sediment creep ( Bed Load), and also debit [relation/link] irrigate with Sediment Yield. Rest of Accumulating basin of Darma known from sediment amount closing over dead accommodationResult research of menunjukan that surface land;ground erosion storey;level that is 31.558,74 ton / year, or mean 573,795 ton/ha/tahun, total erosion 39.448,43 ton / year or 717,244 enabled land;ground erosion and ton/ha/tahun that is 686,033 ton / year or [about/around] 12,473 ton/ha/tahun. datas [of] menunjukan that surface erosion storey;level and total erosion take place big compared to high enough [of] enabled erosion. annual Sediment Yield [in] Accumulating basin of Darma that is 32.996,419 ton / year or 14.873,660 m3. Accumulating basin of Darma cannot function again that is at the (time) of reaching umur ± 84,25 year. Year 2006 Accumulating basin of Darma have operated during 36 year so that the rest of Accumulating basin of Darma fufilled [by] dead accomodation him by sediment that is ± 48,25 dead accomodation or year will loaded full (of) that is [at] year ± 2054.
ANALYSIS OFTHIOCYANATE ON URINE AS MONITORING METHOD OF POTENTIAL GAKI (IODINE DEFICIENCY DISORDERS) BASED ON TEST KIT Yulia Dwi Cahyani; Mike Nur Izzati; M Dzulfahmi Ramadhan
Jurnal Penelitian Saintek Vol 20, No 1: April 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1394.657 KB) | DOI: 10.21831/jps.v20i1.5612

Abstract

The aim of the researh is to analyse of thiocyanate on urine. In this research, thiocyanate is oxidized by hypochlorite to cyanide that can react with ninhydrin to form a red complex compound called hydrindantin. The color intensity of red hydrindantin is proprotional to thiocyanate concentration. The higher thiocyanate concentration then the higher color intensity is. The optimum condition to form hydrindantin, such as pH, concentration of hypochlorite, and time stability of hydrindantin formation was studied using spectrophotometry at maximum wavelength of 489.50nm. The optimum condition for hydrindantin complex were pH of 10, concentration of hypochlorite of 0.05M, and the time stability of hydrindatin is 15 minutes. The proposed test kit can be used to determine thiocyanate concentration at range of 1-10ppm. The test kit has been applied to synthetic sample and urine, also compared the result to those obtained from standard spectrophotometric method to based formation of complex Fe(SCN)2+.
THE EFFECT OF p-HIDROXY m-METHOXY CHALCONE (pHmMK) ON Bcl-2 AND Bax PROTEIN EXPRESSION IN MCF-7 BREAST CANCER CELL LINES Retno Arianingrum
Jurnal Penelitian Saintek Vol 21, No 1: April 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.151 KB) | DOI: 10.21831/jps.v21i1.10873

Abstract

Chalcone derivate compound [3-(4’-hydroxy-3’-methoxyphenyl) -1-phenyl-2- propene-1-on)] or para hydroxyl meta methoxy chalcone (pHmMC) has been observed. It showed that it is able to induce apoptosis (cell death) in MCF-7 breast cancer cell. This study was aimed at fi nding out the apoptosis mechanism pathway of pHmMC on MCF-7 cells by observing its effect on Bcl-2 and Bax proteins. The protein expression was observed by using immunocytochemistry (ICC) and analyzed using ImageJ software. The results showed that the pHmMC induce apoptosis through mechanism that decrease expression of Bcl-2 and increase expresion of Bax proteins.
BIOMECHANICAL ANALYSIS OF SERVICE TECHNIQUES IN SENIOR DIY ATLET Cerika Rismayanthi; Abdul Alim
Jurnal Penelitian Saintek Vol 16, No 1: April 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10010.091 KB) | DOI: 10.21831/jps.v16i1.1739

Abstract

Penelitian ini bertujuan untuk mengetahui gambaran secara khusus kinerja teknik  servis atlet tenis  lapangan  senior DIY tahun 2010 dari tahap persiapan sampai  dengan follow­ through dengan kajian anal isis biomekanika.Metode yang digunakan dalam penelitian ini adalah metode  penelitian survei  dengan teknik observasi. Instrumen yang digunakan adalah kisi-kisi lembar  analisis, handycam dan treepod. Subyeknya penelitian adalah atlet senior di DIY yang  berjumlah 6 orang. Teknik analisis data penelitian adalah diskriptif dan persentase  dengan perhitungan  pada masing-masing tahap dan digunakan analisis sistem  perangkat lunak Dartfish Prosuite untuk mengetahui lebih jelas kinerja teknik servis yang dilakukan atlet senior DIY Tahun 2010.Hasil peneJitian menunjukkan: kinerja teknik servis tenis lapangan pada atlet senior Daerah Istimewa Yogyakarta Tahun 2010 pada tahap persiapan baik, pada tahap  take back cukup  baik,  pada tahap  loading cukup  baik,  pada tahap  hitting baik,  pada tahap contact point baik, dan pad a tahap followthrough baik. Dari hasil  keseluruhan kinerja teknik servis tenis lapangan pada atlet senior Daerah Istimewa Yogyakarta Tahun 2010 di kategorikan baik. Kata kunci: teknik servis, tenis lapangan, analisis biomekanik
THE EFFICATION OF AEDES AEGYPTI BIOLARVASIDA GRANUL FROM ETIL ACETAT EXTRACT OF MARSH FLEABANE LEAVES Agus Rochmat; Mita Napitasari; Afdwiyarni Metta Karina
Jurnal Penelitian Saintek Vol 22, No 1: April 2017
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.386 KB) | DOI: 10.21831/jps.v22i1.13896

Abstract

This study was aimed at determining the activity of Marsh Fleabane leaves extract against Aedes aegypti mosquito larvae mortality. Marsh Fleabane leaves extract was obtained using ethanol solvent. After obtaining the viscous extract, the extract was fractionated with solvent n-hexan and ethyl acetate. The ability of this biolarvaside was determined by LC50 value and reinforced by identifying of active compound content. This biolarvaside test was conducted on Aedes aegypti mosquito larvae with variation of extract concentration 50, 100, 250, 500, and 1000 ppm during 24 hours observation. Identification of compound content was done by testing the sample with GC-MS analysis. The results show that the yield of ethyl acetate extract equal to 1.86%. The LC value of this ethyl acetate extract was 105.79 ppm. The obtained LC50 values including active biolarvacidal groups and positive controls using abate had LC100 values at 100 ppm concentrations. Meanwhile, the LC50 value on granules using marsh Fleabane leaves extract content was obtained at 96.34ppm and LC90 was 905.1 ppm. The ability of active biolarvaside is corroborated by GC-MS analysis results indicating that the biolarvacid content of active compounds contained in ethyl acetate extract expected as quinic acid
VARIATIONS OF MANITOL LEVEL AND CORN SYRUP AS A BASE IN NUTRASEUTICAL FORMULATION OF GUMMY CANDIES SUGAR CANE SARI MARKISA YELLOW (Passiflora edulis var. Flavicanpa) Feris Firdaus; Fajriyanto Fajriyanto
Jurnal Penelitian Saintek Vol 18, No 1: April 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9406.259 KB) | DOI: 10.21831/jps.v18i1.1833

Abstract

The yellow passion fruit (Passiflora edulis var. Jlavicarpa) is formulated into a nutraceutical product in the form of a gummy candies preparation. Furthermore, various tests of gummy candies produced were organoleptic test, weight uniformity test, and favorite level test. Based on the results of the research, yellow passion fruit (Passiflora edulis var.jlavicarpa) can be formulated into good nutraceutical products in the form of gummy candies preparations. The result of organoleptic test showed that the preparation of gummy candies formula 3 with the base of mannitol and corn syrup (25%: 75%) had the best form, color, taste, odor and texture compared to other formula. Based on the results of uniformity test weight is known that the variation in the ratio of mannitol and corn syrup as the basis of gummy candies does not affect the uniformity of weight but affects the form of gummy candies preparations. Based on the results of hedonic test of respondents for the parameters of shape, color, taste, odor, and texture of gummy candies of passion fruit essence, formula 3 is the most preferred formula by the respondents.

Page 16 of 29 | Total Record : 286

 14   15   16   17   18 

Filter by Year

2001 2025


Reset
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