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Jurnal Sains Dasar

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Published by Universitas Negeri Yogyakarta

ISSN : 20859872 EISSN : 24431273 DOI : 10.21831

Core Subject : Education,

Education

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Articles 10 Documents

Search results for , issue "Vol 7, No 1 (2018): April 2018" : 10 Documents clear

ANALYSIS OF PHYSICAL PROPERTIES OF OPEN CLUSTER M45 BY CCD PHOTOMETRY TECHNIQUE Chaiwarakorn, Sommkorn; Sukkaew, Adulsman; Chemasalae, Salmee; Thassana, Chewa
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v7i1.22239

In this work, the open cluster M45 was observed by CCD photometry technique using a standard UBV filter via Ritchey-Chretien Telescope, which has a diameter of 0.5 meter. The author measured data have to be analyzed by using IRIS program, shows that the true apparent magnitudes of the 30 stars in the visual and blue wavelength bands range from 8.244 to 9.000, and 8.278 to 9.005, absolute magnitudes in the visual and blue wavelength bands range from 2.544 to 3.300, and 2.578 to 3.338, respectively. The color indices range from -0.773 to 0.955. And standard published color indices and magnitude diagrams for the 30 stars were used. In order to obtain a Hertzsprung - Russell diagram (H-R diagram) of certain stars, was sufficient to calculate the distance of the open cluster M45 from earth at 138.038 parsecs, and its age at 1.6 x 108 years. Keywords: cluster M45, CCD photometry, IRIS proggram

EXPOSURE RELATIONSHIP INFORMATION WITH THE LEVEL OF KNOWLEDGE AND BEHAVIOUR BSE IN WOMEN Intan Mutiara Putri; Evi Nurhidayati; Djaswadi Dasuki
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v7i1.22261

The incidence of breast cancer by 40 per 100,000 women and will increase if there are one or more risk factors for breast cancer. Breast self-examination (BSE) is the early detection of breast cancer is the most widely recommended for every woman. The American Cancer Society recommends young women after the age of 20 to be screened with BSE every month. Nowadays there is a tendency of breast cancer experienced by women with age (15-20an). The purpose of this study to determine the relationship of information exposure to the level of knowledge of women about breast cancer and BSE behavior. Descriptive analytic research with cross sectional study sampled women aged 20-65 years living in the of Tegalrejo Yogyakarta total of 100 respondents. The sampling technique using a multistage random sampling. Bivariate data analysis using Chi - Square with significance level ρ 0.05 and CI 95% . The results of chi-square analysis of a significant relationship between exposure information with the level of knowledge about breast cancer and BSE with a p-value (0.021) and the OR value of 4.015. The results of chi-square analysis of a significant relationship between exposure information with BSE practice with a p-value (0.002) and the OR value of 3,3. In conclusion, hhere is a relationship between the exposure of information to the level of knowledge and breast self examanation behavior. Keywords: exposure information, knowledge, breast cancer, BSE

SINTESIS DAN KARAKTERISASI METIL ESTER MINYAK BIJI CARICA DIENG (Carica candamarcensis) SEBAGAI BAHAN BAKAR BIODIESEL Nugroho Wahyu Sumartono; Joko Wahyono; Sonia Latifah; Anisa Ratih Pratiwi; Endang Dwi Siswani
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Tujuan penelitian ini adalah menyintesis metil ester minyak biji carica dieng dan mengetahui karakteristiknya sebagai bahan bakar biodiesel. Proses sintesis metil ester minyak biji carica dieng melalui tahapan ekstraksi dan penjernihan minyak biji carica dieng, penentuan kadar asam lemak bebas, esterifikasi, dan sintesis ester biodiesel dengan transesterifikasi. Rendemen minyak biji carica dieng yang diperoleh dalam penelitian ini sebesar 38,80% dan rendemen metil ester biodiesel sebesar 67,0%. Hasil analisis spektroskopi IR dan kromatogram GC-MS menunjukkan bahwa minyak biji carica dieng berhasil terkonversi menjadi ester biodiesel berdasarkan perubahan gugus fungsi serta adanya senyawa ester biodiesel yang teridentifikasi. Metil ester minyak biji carica dieng memiliki viskositas kinematik sebesar 5,132 mm2/s, titik tuang pada -6 oC dan rerata kalor pembakaran sebesar 10.176,65 kal/g. Berdasarkan hasil karakteristik tersebut, metil ester minyak biji carica dieng telah memenuhi standar dan berpotensi dijadikan bahan bakar biodiesel. Kata kunci: Biodiesel, Carica candamarcensis, Dieng, Energi, Metil Ester, Minyak SYNTHESIS AND CHARACTERIZATION OF METHYL ESTER FROM CARICA DIENG (Carica candamarcensis) SEED OIL AS BIODIESEL FUEL The purpose of this research is to synthesize methyl ester of carica dieng seed oil and to know its characteristic as biodiesel fuel. The synthesis of methyl esters from carica dieng seed oil, carried out through the stages of extraction and purification of carica dieng seed oil, determination of free fatty acid content, esterification, and synthesis of biodiesel ester with transesterification. The yield of carica seed oil obtained in this research was 38.80% and the yield of methyl ester biodiesel was 67.0%. The results of IR spectroscopic analysis and GC-MS chromatogram showed that carica seed oil was successfully converted into biodiesel ester based on functional group changes as well as the presence of identified biodiesel ester compounds. Methyl ester of carica dieng seed oil has a kinematic viscosity of 5.132 mm2/s, a pour point at -6 °C and an average gross calorific value of 10,176.65 cal / g. Based on the results of these characteristics, methyl esters of carica dieng seed oil can potentially be used as biodiesel fuel. Keywords: Biodiesel, Carica candamarcensis, Dieng, Energy, Methyl Ester, Oil

SUPPORT RELATIONSHIP HUSBAND WITH MOTHER’S CONTRACEPTION SELECTION IN SIDOREJO VILLAGE, GODEAN, SLEMAN Enny Fitriahadi; Mita Mailani
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v7i1.22262

Contraception use is the most prominent birth control and is proven to bring impact on fertility rate. Higher maternal fertility rates will have an impact on maternal deaths. Higher population development and unexpected pregnancy become the risk that can happen due to inefficient contraception equipment use. Intra uteri contraception is the most effective, safe, and comfortable contraception equipment for a lot of women. The objective of the study was to investigate the correlation between husband’s support and the choice of intra uteri contraception in Sidorejo Godean II Sleman Regency. The study employed analytical survey with cross sectional approach. The dependent variable was husband’s support, and independent variable was the choice of intra uteri contraception. Sample taking used cluster sampling technique with 85 husbands as the respondents. Chi square test was used to analyze the data. The result of the study showed that analysis result with chi square test obtained significance value (p-value) 0.000 smaller than 0.05 (p0.05). Statistical result showed that there was correlation between husband’s support and the choice of intra uteri contraception. There was correlation between husband’s support and the choice of intra uteri contraception. It is expected that husband’s can give support holistically, so their wives can use contraception that is the most suitable with their condition and their comfort. Keywords: husband’s support, choice of intra uteri contraception

CAN NANPCELLULOSE-TEXT AFFECT THE FIRST-YEAR PRE-SERVICE TEACHERS’ CHEMICAL LITERACY? Hernani Hernani; Billy Oktora Abdillah Fauzi; Ahmad Mudzakir
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

This research aims to identify the weaknesses of the nanocellulose context based-enrichment book against chemical literacy ability of pre-service teachers based on scientific attitudes and scientific competencies in PISA 2015 through individualized learning. This research uses descriptive method. This research involved 18 first-year students of chemical education. The Instrument that used in this research is multiple-choice questions based on scientific attitudes and scientific competencies in PISA 2015 and linked to nanocellulose and ionic liquids context. The results of this research are the percentages of the weaknesses of chemical literacy ability, the results are as follows: 1) in the attitude aspects of “interest in science and technology”, environmental awareness, and valuing scientific approaches to inquiry, the results obtained respectively for 78,0%, 5,6%, and 100,0%; 2) Apply appropriate scientifc knowledge, 11,0%; 3) Identify, use and generate explanatory models and representations, 59,3%; 4) Justify appropriate predictions, 44,4%; 5) Offer explanatory hypotheses, 83,0%; 6) Explain the potential implications of scientifc knowledge for society, 50,0%; 7) Distinguish questions that could be investigated scientifcally, 22,0%; 8) Transform data from one representation to another, 89,0%; 9) Analyse and interpret data and draw appropriate conclusions, 11,1%. Based on the results, the nanocellulose context based-enrichment book has a weakness in developing scientific attitude “environmental awareness” and has weaknesses in developing sub-scientific competencies “apply appropriate scientific knowledge”, “distinguish questions that could be investigated scientifically” and “analyse and interpret data and draw appropriate conclusion”. Keywords: nanocellulose-text, PISA 2015, descriptive method

SYNTHESIS OF ADSORBENT MAGNETITE SILICA FUNCTIONALIZED CETYLTRIMETHYLAMMONIUM BROMIDE (CTAB) FROM IRON SAND KLAYAR BEACH PACITAN Endang Sawitri; Choiril Azmiyawati; P Siahaan; Adi Darmawan
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Synthesis of Magnetite Silica cetyltrimethylammonium bromide (magsil-CTAB) had been successfully performed using iron sand Klayar beach as a source of natural magnetite, sodium silicate, HCl, and cetyltrimethylammonium bromide (CTAB). Addition of CTAB on silica magnetite was expected to improve the ability of the adsorbent to adsorb polar compounds such as phenols. Synthesis began with the separation of the magnetite from iron sands by separation magnetically done using permanent magnets. Silica coating on magnetite done via sol-gel method with a ratio 1:20 of magnetite and sodium silicate followed by addition of HCl to form a gel. Gel was dried at a temperature of 80 0C and 350 °C for calcination. Results obtained soaked with CTAB solution with a concentration of 0.5 mM; 1 mM; 2 mM and stirred for 24 hours. Binding of silica and magnetite above the CTAB tested by Fourier Transform Infra Red (FTIR). The presence of silica in magnetite indicated by the appearance of spectra at wave number 900 and 3500-3200 cm-1 indicating the presence of a hydroxyl group of silanol and water molecules. Besides the presence of two strong peaks observed around 1100 and 800 cm-1, respectively show the Si-O-Si asymmetric stretching and bending. From the results of spectra could be seen further there were difference intensity of the main peaks for different samples used, especially on the area around 2300 cm-1 to be a group of nitrile (C-N) and about 3700-3500 cm-1 due to the amide (N-H) of the CTAB as expected. Keywords: magnetite, silica, sol-gel, coating, CTAB

STUDI PETROGRAFI DAERAH BAGELEN KABUPATEN PURWOREJO PROVINSI JAWA TENGAH Dian Susri Nurhaci
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Abstrak Lokasi penelitian terletak di Provinsi Jawa Tengah tepatnya di Kecamatan Bagelen, Kabupaten Purworejo yang berdasarkan peta fisiografi daerah Jawa Tengah dan Jawa Timur termasuk dalam Zona Kubah dan Perbukitan dalam Depresi Sentral, rangkaian Pegunungan Serayu Selatan. Daerah Kabupaten Purworejo dibagi menjadi tiga satuan bentang alam, yakni Pegunungan Kulonprogo, Pegunungan Serayu Selatan, dan Dataran Purworejo. Hasil analisis petrografi batuan beku di daerah Bagelen, Purworejo, Jawa Tengah berupa batuan Andesit. Secara petrografi batuan beku andesit memiliki tekstur Profiro afanitik dengan fase fenokris di dominasi oleh mineral Plagioklas, Hornblenda, Piroksin dan opak dengan proporsi yang berbeda dalam setiap batuan, sedangkan fase masadasarnya didominasi oleh mikro-mikrokristalin plagioklas, piroksen, hornblenda dan mineral opak. Komposisi batuan andesit yang dianalisa melalui metode petrografi menandakan bahwa di daerah tersebut diperkirakan berhubungan dengan hasil proses adanya aktivitas gunung api yang pernah ada sebelumnya. Kata kunci: Petrografi, gunung api, geologi purworejoThe research location is situated in the province of Central Java, precisely in the District Bagelen, Purworejo which is based on a map of the physiographic region of Central Java and East Java included in the Dome Zone and hills in the Central Depression, South Serayu Mountains series. Purworejo district area is divided into three units of the landscape, the mountains Kulonprogro, South Serayu Mountains, and Plains Purworejo. The results of petrochemical analysis of igneous rocks in Bagelen, Purworejo, Central Java in the form of Andesite rocks. In petrography of igneous rocks of andesite has Profiro afanitik texture with phenocrysts phase dominated by Plagioclase minerals, hornblende, piroksin and opaque with different proportions in every rock, whereas masadasarnya phase is dominated by micro-microcrystalline plagioclase, pyroxene, hornblende and opaque minerals. Andesite composition are analyzed by petrographic methods indicates that in the area thought to be related to the results of the volcanic activity that never existed before. Keywords: Petrography, volcano

MODIFICATION OF VOLCANIC ASH OF KELUD AS SELECTIVE ADSORBENT MATERIAL FOR Zn(II) AND Cr(VI) METAL IONS Susila Kristianingrum; Endang Dwi Siswani; Sulistyani Sulistyani
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v7i1.22246

This research aims to prepare an adsorbent from Kelud volcanic ash for better adsorption efficiency of Zn(II) and Cr(VI) than Kieselgel60GE'Merck. Adsorbent synthesis has been carried out by dissolving 6 grams of volcanic ash, activated at 700 oC for 4 hours and washed with HCl 0.1 M into 200 mL of sodium hydroxide 3 M with stirring and heating at 100 °C for 1 hour. Then, sodium silicate filtrate was neutralized using hydrochloric acid. The mixture was allowed to stand for 24 hours then filtered and washed with aqua DM, then dried and crushed. The procedure was repeated for nitric acid with a contact time of 24 hours. The products were then characterized using FTIR subsequently determined acidity, moisture content, and tested for its adsorption of the Zn(II) and Cr(VI) ions, by using AAS. The results showed that the type of acid that produced highest rendemen is AK-HCl-3M i.e. 25.50%, acidity of the synthesized adsorbent silica gel all have similarities with Kiesel gel 60G E' Merck ie 6.302mmol/g and the water content of the silica gel adsorbent synthesized similar to Kiesel gel 60G E' Merck i.e adsorbent AK- HCl-3 M. The character of the functional groups of silica gel synthesized all have similarities with Kiesel gel 60G E'Merck as a comparison. Qualitative analysis by FTIR indicates that it has formed a bond of Si-O-Si and Si-OH. The optimum adsorption efficiency of the metal ion Zn(II) obtained from AK-HNO3-3 M adsorbent is equal to 63.24% for electroplating waste and the optimum adsorption efficiency of the Cr(VI) metal ion obtained from the adsorbent AK- HNO3-3M is equal to 64.01% for tannery waste. Keywords: Kelud, Volcanic Ash, Adsorbent

THE APPLICATION OF DEEP NEURAL NETWORK FOR BREAST CANCER CLASSIFICATION Devi Nurtiyasari; Abdurakhman Abdurakhman; Muhamad Rashif Hilmi
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Breast cancer is one of the most common cancers, especially for women. Early detection of breast cancer may increase the survival rate of patients significantly. Detecting breast cancer from breast image can be done by classification process. There are so many classification models which can be used for the classification process, such as neural network, fuzzy, neuro fuzzy, wavelet neural network, wavelet neuro fuzzy, etc. This research propose one of the neural network variant, i.e. Deep Neural Network. This kind of neural network model is using at least two hidden layers on the network. The more hidden layers used the deeper the neural network will be. The architecture of Deep Neural Network used in this research is feedforward network. Classification of breast tumor using Deep Neural Network model provides results with sensitivity, specificity, and accuracy were respectively 100%, 100%, and 66.67% for training data and 100%, 20%, and 60% for testing data. Keywords: breast cancer, Deep Neural Network

SYNTHESIS OF MEMBRANES FROM PILLARED CLAY FeCl3 FOR SEAWATER DESALINATION APPLICATION Muslimin, Muslimin; Darmawan, Adi; Lusiana, RA.
Jurnal Sains Dasar Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Synthesis of membranes has been done using pillared clay FeCl3for desalination application. Pillared clays FeCl3were synthesized via a sol-gel method using [OH] / [Fe] 0.25, 0.5, 1, 2, 2.5. Formed sol-gel was furnace on 600oC for 2 hours. The membranes which were cooled at room temperature for 3 days then tested filtration of seawater. The results showed that membrane pillared clays FeCl3 with a ratio [OH] / [Fe] 0.25 reached filtration purity 99.99% with the initial TDS 27.58 ppm and resulted rejection TDS 00.22 ppm after filtration. Membrane with ratio [OH] / [Fe] 0.5 reached filtration purity 80%, with initial TDS 27.58 ppm and resulted rejection TDS 11.76 ppm, while membranes with ratio [OH] / [Fe] 1,2 and 2,5 was broken during the filtration proces, its resulted very small rejection. Keywords: membrane, pillared clay, FeCl3, Seawater desalination

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