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Jurnal Penelitian Saintek
ISSN : 14123991     EISSN : 25287036     DOI : 10.21831
Core Subject : Science,
Arjuna Subject : -
Articles 208 Documents
THE EFFECT OF THE GRAIN SIZE AND THE TYPE OF FLUIDS FILLING THE PORE OF IRON SAND TOWARD ITS MAGNETIC SUSCEPTIBILITY Ipa, Sangaji Hasmi Maharani
Jurnal Penelitian Saintek Vol 20, No 2: Oktober 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v20i2.9599

Abstract

This study was aimed at assessing the effect of grain size and type of ? uid ? lling the pore to its magnetic susceptibility value. Iron sand was separated based on the grain size into 0.5 mm, 0.25 mm, 0.125 mm and 0.074 mm and based on the condition; namely dry, mixed with distilled water and salt water. Some measurements were done in the laboratory using Bartington MS2 Susceptibility Magnetic Meter and XRD (X-Ray Diffraction). Bartington MS2 Susceptibility Magnetic Meter is used to measure the magnetic susceptibility of each grain size in all conditions, while XRD is used to identify the type and the concentration of minerals contained in each size of iron sand. Iron sand with the smaller grain size and high concentration of magnetite mineral will increase the value of magnetic susceptibility and its density. In addition, the type of ? uids that ? lls the pore of each size also gives the variations of the magnetic susceptibility.
ANTIVIRAL ACTIVITY TESTS OF SOME ZINGIBERACEAE PLANTS Atun, Sri; Aznam, Nurfina; Arianingrum, Retno; Nurestri, Sri
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 | DOI: 10.21831/jps.v16i1.1735

Abstract

Tujuan dari penelitian  ini adalah untuk mengetahui  aktivitas  antiviral dari beberapa rimpang tumbuhan Zingiberaceae di Indonesia. Beberapa rimpang tumbuhan yang diteliti antara lain kunci pepet (Kaemferia  rotunda), temugiring  (Curcuma heyneana Val), lengkuas (Alpinia galanga Sw), dan temuireng (Curcuma aeruginosa Roxb). Uji  aktivitas antiviral dilakukan terhadap virus AI H5Nl, dengan cara membuat suspensi virus AI H5Nl 0,1 mL + 0,5 mL larutan ekstrak 1% ditambah antibiotika penisilin  10.000 IU/mL, streptomycin 10 mg/mL, diinkubasi 37°C selama 30 menit. Suspensi virus tersebut sebanyak 0,1 mL diinokulasikan pada TAB lewat ruang korioalantois.   Telur diinkubasi dalam mesin penetas selama 3 hari. Diamati ada tidaknya kematian embrio setiap hari. Telur disimpan dalam almari es selama 24 jam, kemudian cairan alantois dipanen untuk diuji titer hemaglutinasinya (HA). Uji hemaglutinasi dilakukan  menurut OlE (2008) dengan modifikasi. Pada prinsipnya cairan alantois 0,05 mL diencerkan seri 2 kali kemudian direaksikan dengan eritrosit ayam 0,5%. HA dikatakan positif apabila terjadi hemaglutinasi. Titer HA adalah kebalikan dari pengenceran tertinggi yang masih menunjukkan reaksi positif. Ekstrak dikatakan mempunyai  aktivitas antiviral apabila titer HA berbeda signifikan dengan kontrol atau bahkan titer HA sekitar 2°. Sebagai kontrol digunakan em brio telur yang diinokulasi hanya dengan suspensi virus AI H5N1. Uji aktivitas antiviral terhadap virus AI H5Nl dari ekstrak  maupun fraksi-fraksi dari umbi tumbuhan kunci pepet (Kaemferia rotunda), temugiring   (Curcuma heyneana Val), lengkuas (Alpinia galanga Sw), dan temuireng (Curcuma  aeruginosa Roxb), menunjukkan ekstrak metanol dari kunci pepet, temu ireng, dan  temu  giring menunjukkan aktivitas antiviral rendah, sedangkan fraksi heksan kunci pepet dan-fraksi heksan temu ireng menunjukkan aktivitas antiviral yang tinggi. Kata kunci: obat herbal Nusantara;  antiviral; H5NI 
DESIGNING NUTRITION NEED ANALYSIS COUNTER SOFTWARE Handayani, Titin Hera Widi
Jurnal Penelitian Saintek Vol 21, No 2: Oktober 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v21i2.12650

Abstract

This study was aimed at designing software that can calculate the nutritional needs of the community. The device is generated from an application program that is speci? cally designed to determine lean body mass, nutritional status and nutritional value needs. It is guided by the science of nutrition and health in an ef? cient, inexpensive and accurate ways. This study used design software method. The ? rst stage of the analysis, which consists of user needs analysis, job analysis, and technology analysis. The second stage is a block diagram including interface design and ? owchart design. The third stage, design modules translation was done using a programming language into the application form called coding/ implementation. The fourth stage was testing the system using black box testing. The application design includes the creation of database structure, program ? ow design and user interface. The design of the database was realized in 9 tables. The ? ow program was depicted in Entity Relationship Diagram, Data Flowchart and Applications Flowchart. The interface design consisted of 17 display interface/ application form.
TECHNOLOGY DEVELOPMENT OF LEATHER PRESERVATION FOR CRAFT HANDICRAFT PRODUCTS Hendri, Zulfi; Arianingrum, Retno
Jurnal Penelitian Saintek Vol 15, No 2: Oktober 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v15i2.1754

Abstract

The purpose of  this  research   is  developing  preservation   technology  of  the  Pondoh zalacca  and  Zalacca  Gading peel for craft products   material.  The study  begins  with analyzing  content,  water,  carbohydrates, and proteins  in the peel  of zalacca  that is the cause of the growth  of fungus  and microorganisms. The next step is preservation  using borax, formalin, and  chlorine  at concentrations: 2, 4, 6, 8, and  10%. The activity  of fungal   growth  on  the peel  were  observed  in  microscopic,   and  the  characteristics of materials for  craft products  made by observing  the characteristics  of the peel  including the texture, softness,  andfracture. The results showed  that the bark peel has high content of  water which is 74.67% in Pondoh zalacca and 30.06% in zalacca gading. The carbohydrate   content  of  Pondoh  zalacca  peel   at 3.8%,  and  zalacca  gading  peel   at 5.5%. Protein  content at 0.565% in Pondoh zalacca  and 1.815% in zalacca  gading.  The observation for 3 (three) months showed preservation  with borax, formalin,  and chlorine at  all  concentrations  effectively  prevent  fungal   growth.  The  good  peel   elasticity   of Pondoh  zalacca  and  Gading produced by  using borax, formalin, and chlorine  in  the concentration  of below 6%, while giving preservative  chlorine above 4% make the peel a -little whiter, and preservation  of over 4% borax makes chapped peel so it is difficult to be attached to the craft media. Keywords:  Technology, Preservation,  Zalacca peel, and Art Crafts
WELDING TECHNICAL CLINIC ANALYSIS OF WELDING SMAW WELDING IN VEHICLES OF DISTORTION RECESSING Wibowo, Heri; Jatmiko, Riswan Dwi
Jurnal Penelitian Saintek Vol 15, No 2: Oktober 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v15i2.19116

Abstract

Contplicated distortion alu,ays )tappens in metel melting and.freezirtg proL'ess on welding Lip trt now, the common merhod to recluce distnrtion are; base ntetal prehettling, heat irtput minirualization, welding process sequence, etc. the last has been u,setJ l:y tr'r,Uort, hov:ettet' lhe sequence ofbest effectivitlt and elficiency has not been yet studied. This research aims to l<now ffict of welding process sequence b), sttrdied 5 dil/brent v,elding route related to angle distortion (a), bending distortion (0), c'ross distortian (LI .l anci atial distortion (LP). 'tilelding process used sltielded metal arc welding, base metal ofST 37 and electrode of E6013; 2.6 mm and 3.2 mm of diameter. Fou'kinds oJ te,st used ungle gauge oJ 0.lo precision ctnd caliper of 0.05 mm precision.Based on the test, it could be known that the lov:est angle distortion toctk pluc:e on 3 tirues roule that was 3.07", while the highest happened at 5 times route methoci thai v'Lts 9.23". the lov'esl ben.ding distortion took place on I and 3 lintes route thal wctre 1.50 mm anci 1.52, respectit'e1.1:, wh.ile the highest happened at 5 times rrnrte ruethod that wqs 1 70 rnnt. Cross clistortictn ancl ctnglc distortion tended to have lowest distortion at 3 titnes route, v,hile axial distortion and bentling distortion at I and 3 times routes. All that kinds of dislortion had llte lowest valtte ctt 3 times rotfie v'hichwas the best welding route at sheet ntetal ctf 5 nmt thickness.
DETERMINATION OF AMERICAN TYPE STOCK OPTION PRICE WITH DISTRIBUTION DEVIDEN USING FINITE ELEMENT METHOD Binatari, Nikenasih; Kusumawati, Rosita; Latif, Ade
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v18i2.2141

Abstract

Changes in stock price, either when the stock price increases or decreases, can be exploited for profit. One of the investment instruments that can be used to take advantage of the stock price change is a stock option. In addition, stock options can also be used to minimize the amount of losses that may be suffered by investors. One of the keys to take advantage of the stock options is the precision determination of the type of stock option exercise price. Black-Scholes model is a model that has been widely used as an approach to solve the problem of determining the exercise  transaction costs, risk-free interest rates, and changes in stock prices follow a random pattern. Meanwhile, most of the stock options are traded in fact pay dividends. Because the most heavily traded stock options is stock options American type, then the purpose of this study was to determine the Black-Scholes option pricing American type stock with the dividend model using finite element method. At case one year expiration date, execution price $10, risk-free interest rate 10%, paid dividend proportion 5%, stock price volatility 0,32, call option price at market $1,5 and put option price at market $6 then the result shows that call option price is $1,8 and put option price is $5,3. Because call option price is cheaper then investor better buy the option while for put option price, because it?s more expensive then investor better not buy the option.  price of stock options. The assumption of this model is not giving the stock dividend, no transaction costs, risk-free interest rates, and changes in stock prices follow a random pattern. Meanwhile, most of the stock options are traded in fact pay dividends. Because the most heavily traded stock options is stock options American type, then the purpose of this study was to determine the Black-Scholes option pricing American type stock with the dividend model using finite element method. At case one year expiration date, execution price $10, risk-free interest rate 10%, paid dividend proportion 5%, stock price volatility 0,32, call option price at market $1,5 and put option price at market $6 then the result shows that call option price is $1,8 and put option price is $5,3. Because call option price is cheaper then investor better buy the option 
PENGEMBANGAN PROBIOTIK BAKTERI ASAM LAKTAT DARI LIMBAH IKAN YANG BERPOTENSI MENURUNKAN KADAR KOLESTEROL DAGING AYAM BROILER STRAIN HUBBART Astuti, Astuti
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v15i1.1725

Abstract

The  aims  of  this  research  is  to find   the  influence  of  giving   isolate  probiotic   BAL Streptococcus  thermophillus from the fish  waste toward the broilers' appearance of woof and the degree of broilers'  cholesterol. The research materials are 40 roosters of broiler Strain  Lohmann, production  of PT Multi  Breeder Adirama  at the age of 1 week. The probiotic of isolate treatment of Lactate Acid  Bacteria (BAL) which is used in this research is Streptococcus  thermophillus bacteria in from of freeze dying which comes from  Nutrition Biochemical Laboratory, Veterinary Faculty of UGM The treatment I is as the control (without BAL), the number of BAL in treatment  II is  106 CFU/ml,  the number of BAL in treatment III is 107 CFU/ml, the number of BAL in treatment IV is 108 CFU/ml. The data collection for the degree of cholesterol is done after 28 days. The data which is collected of woof and the degree of broilers'  cholesterol.  The research result: the treatment of giving  lactate  acid bacteria of Streptococcus thermophillus caused the decrease  of the degree of broilers' cholesterol significantly and the best level of BAL is 108 CFU/ml.
MECHANICAL PROPERTIES OF CELLULOSE BACTERIA FROM COCONUT WATER WITH ADDITION OF THE CHITOSAN Rahayu, Tutiek; Rohaeti, Eli
Jurnal Penelitian Saintek Vol 19, No 2: Oktober 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v19i2.3498

Abstract

The objective of this research were to identify the chitosan concentration that produced bacterial cellulose-chitosan with optimum mechanical properties and to identtify the effect of chitosan addition for function group, cross section morphology, and crystallinity of bacterial cellulose based coconut water. Bacterial cellulose-chitosan has been succesfully prepared by immersing dry bacterial cellulose in chitosan solution 0.5; 1.0; 1.5; 2.0; 2.5; and 3.0% (m/v) for 6 hours. The films were characterized using tensile tester to identify mechanical properties, XRD (X-Ray Diffraction) to identify crystallinity, FTIR (Fourier Transform Infrared) to identify functional group, and SEM (Scanning Electron Microscope) to identify cross section morphology. The bacterial cellulose-chitosan 0.5% had the most optimum mechanical properties. The addition of chitosan could decrease elongation at break, and also increase strenght at break and modulus Young of bacterial cellulose. The crystalinity decreased with the addition of chitosan 0.5% from 30.43% to 15.38%. On the other hand, the FTIR spectrum showed that there was interaction between bacterial cellulose and chitosan molecule. SEM images show that bacterial cellulose consisted of tight fibrin thread, so it could form layers. Bacterial cellulose-chitosan 0.5% consisted of multilayered of bacterial cellulose and chitosan layers.
PEMUPUKAN DAN INDUKSI CURCUMA MANGGA VAL. UNTUK PENINGKATAN ZAT ANTIKANKER DAN UJI SITOTOKSITASNYA PADA T47D Sudibyo, Retno Sunarminingsih; Taryono, Taryono
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v25i1.28045

Abstract

Penelitian ini bertujuan untuk meningkatkan zat antikanker dan uji sitotoksitasnya pada T47D dengan menggunakan metode pemupukan dan induksi pada tanaman Curcuma mangga Val. Penelitian dilaksanakan di Greenhouse milik Pusat Inovasi Agroteknologi Terpadu (PIAT) Universitas Gadjah Mada di Kalitirto, Kecamatan Berbah, Sleman, Yogyakarta. Waktu pelaksanaan awal Januari-Oktober 2019. Pelaksanaan penelitian dibagi menjadi 3 tahap. Tahap pertama penanaman dan pemupukan C. mangga Val. Pemupukan dilakukan menggunakan nitrogren (N) organik dari kompos daun-daun legume, fosfor (P) organik dari pupuk SP36, Kalium (K) dari KCl, dan kombinasi pupuk NPK. Tahap kedua adalah ekstraksi dan penetapan kandungan zat aktif menggunakan alat vaccum-rotavapor dan densitometer. Tahap ketigaadalah Uji sitotoksisitas (MTT Assay) menggunakan bahan Sel T47D, media RPMI, MTT, PBS, SDS, dan bahan-bahan disposable, serta ELISA reader. Hasil penelitian menunjukan bahwa pemupukan N organik pada C. mangga Val. mampu meningkatkan produksi minyak dalam rimpang dan sitotoksisitas minyak terhadap sel kanker payudara T47D. Penghentian pemberian air menjelang masa dorman dan suhu lingkungan yang panas (>37oC) mampu menginduksimajunya masa dorman pada tanaman C. mangga Val.INCREASING ANTICANKER SUBSTANCES AND THE Cytotoxicity TEST ON T47DUSING FERTILIZATION AND INDUCTION ON Curcuma Mango Val.This study was aimed at increasing the anticancer agent and conducting a cytotoxicity test on T47D by using fertilization and induction methods on Curcuma Val mango plant. The study was conducted at the Greenhouse of Agro-technology Innovation Center (AIC), Gadjah Mada University in Kalitirto, Berbah, Sleman, Yogyakarta. The study was conducted from January to October 2019. The research was divided into 3 stages. The fi rst stage of planting and fertilizing C. mango Val. Fertilization was carried out using organic nitrogren (N) fromcompost of legume leaves, organic phosphorus (P) from SP36 fertilizer, Potassium (K) from KCl and NPK fertilizer combination. The second step is the extraction and the determination of the active ingredient using a vacuum-rotary evaporator and a densitometer. The third stage is the cytotoxicity test (MTT Assay) using T47D cell material, RPMI media, MTT, PBS, SDS and disposable materials, and ELISA reader. The results showed that organic N fertilizationon C. mango Val. able to increase oil production in rhizomes and cytotoxicity of oil against T47D breast cancer cells. Discontinuation of water delivery prior to dormancy and hot ambient temperature (> 37oC) is able to induce the advancement of dormancy in C. mango Val plants.
ERGONOMIC REVIEW IMPLEMENTATION OF MATERIALS AND CORRIDOR FLOOR FLOOR DR. SARJITO · YOGYAKARTA Sri Ambarwati, Dwi Retno; Astuti, Eni Puji
Jurnal Penelitian Saintek Vol 12, No 1: April 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v12i1.5456

Abstract

The aim of this research is  to describe how far  is  the ergonomics conditions have been applied in the applying of material and colour of the  corridor floor  at  RSVP   Dr. Sarjito  Yogyakarta, identifying problems that happened and also its cause.The approach of this research is descriptive qualitative, depicting what the existence of the circumstance of corridor floor at RSVP Dr. Sarjito Yogyakarta through observation and documentation 'and to describe the situation of research object, perceiving problems  that happened and its cause.The result of this research indicate that the floor  materialthat   isapplied is ceramic tile that is equal to 99.81 %, rubber vynil is equal to0.08% and cement plaster  is equal to 0.106% from  entire corridor floor  that becoming the research object. Colour of the floor is white that combined by old grey textured ceramic tile. Evaluated from the ergonomics conditions  including  the security, safety  and comfort aspect, ceramic floor that used at the corridor of RSVPDR.SARJITO havefulfilled the conditions. The esthetic conditions with theprincipal consideration of composition not yet beenfullfiled because there an; no variation ofform,  colour and motive. Motive, form and colour are monoton and also there are no emphasis that will attract the attention, make thefeeling bored especially whenfringing at a long corridor,so that the distancefelt farther.

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