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Sample records for boron terhadap sifat

  1. Analisis Pengaruh Doping Nitrogen Terhadap Sifat Kapasitif Superkapasitor Berbahan Graphene

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    Diah Ayu Safitri

    2017-03-01

    Full Text Available Kebutuhan manusia akan barang elektronik semakin meningkat, sehingga meningkat pula kebutuhan akan media penyimpan listrik. Salah satu media penyimpan energy yaitu kapasitor. Electric Double Layer Capacitor (EDLC merupakan superkapasitor yang memiliki waktu hidup yang lebih lama, rapat daya dan kecepatan charging-discharging tinggi. Graphene telah banyak dieksplorasi sebagai material untuk EDLC, salah satunya yaitu dengan pendopingan. Penelitian ini bertujuan untuk menganalisis pengaruh doping nitrogen terhadap struktur dan morfologi serta pengaruh doping nitrogen terhadap sifat kapasitif dari elektroda superkapasitor berbahan Graphene. Sintesis graphene diawali dari grafit yang dioksidasi menjadi grafit oksida dengan metode Hummer. Grafit oksida lalu direduksi dengan metode hydrotermal menjadi graphene. Penelitian ini memvariasikan doping nitrogen dengan penambahan NH4OH 0.1 ml, 0.3 ml dan 1 ml. Material yang disintesis ini dikarakterisasi menggunakan XRD(X-Ray Diffraction, SEM (Scanning Electron Microscopy , EDS (Energy Disspersive X-Ray analysis, FPP (Four Point Probe, dan FTIR (Fourier Transform Infrared Spectroscopu. Dari hasil karakterisasi menunjukkan bahwa material yang disintesis adalah graphene. Sifat kapasitif Elektroda diukur dengan melakukan uji Cyclic Voltametry (CV dengan rentang scan rate 5, 10, 50 dan 100 mV/s. Dari hasil penelitian didapatkan doping nitrogen pada graphene yang paling optimal adalah dengan penambahan NH4OH 0.3 ml yaitu 5.2%at dengan nilai kapasitansi sebesar 208.47 F/g.

  2. PENGARUH VARIASI MEDIA QUENCHING TERHADAP SIFAT MEKANIS RANTAI ELEVATOR FRUIT KELAPA SAWIT

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    Saufik Luthfianto

    2017-03-01

    Full Text Available Tujuan yang ingin dicapai dalam penelitian ini adalah mengetahui pengaruh proses heat treatment dengan media pendingin air+garam terhadap sifat mekanis rantai elevator,  mengetahui pengaruh proses heat treatment dengan media pendingin oli 20w – 50w terhadap sifat mekanis rantai elevator, mengetahui pengaruh proses heat treatment dengan media pendingin air laut terhadap sifat mekanis rantai elevator. Metode yang digunakan dalam penelitian ini adalah metode eksperimen murni. Berdasarkan hasil penelitian diketahui Hasil uji one way ANOVA yang telah dilakukan mengindikasikan bawa Fhitung uji kuat tarik sebesar 2,046, yang lebih kecil daripada Ftabel (2,6 sebesar 5,14 (Fhitung Ftabel, artinya uji kekerasan (Quenching pada ketiga jenis media signifikan berbeda atau terdapat perbedaan kekerasan yang signifikan diantara ketiga jenis penggunaan media

  3. PENGARUH PERBEDAAN SIFAT PENYANGGA ALUMINA TERHADAP SIFAT KATALIS HYDROTREATING BERBASIS NIKEL-MOLIBDENUM

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    Maria Ulfah

    2012-11-01

    Full Text Available EFFECT OF ALUMINA SUPPORT PROPERTIES ON THE NICKEL-MOLIBDENUM BASE HYDROTREATING CATALYST. Effect of surface characteristics of three species of synthesized γ-alumina (alumina-1, alumina-2 and alumina-3 on characteristics NiMo catalysts has been studied. Those aluminas are derived from boehmite Catapal B by varying rasio mol nitric acid to boehmite. A sol-gel method is used to synthesize γ-Al2O3 support. The Nitrogen adsorption, X-ray diffraction (XRD, Temperature Programmed Reduction (TPR of H2, Temperature Programmed Desorption (TPD of NH3, and mechanical strength are used to characterize the supports and catalysts. The results showed that the surface area alumina affects the formation of crystalline MoO3 in the NiMo catalyst, while γ-Al2O3-3 support which has the highest surface area (about 195 m2/g compared to the other two types of alumina (>195 m2/g does not have a crystalline MoO3. The formation of crystalline MoO3 is not influenced by the acidity alumina. Based on the results of XRD, it is  indicated that the supported alumina-3 NiMo catalyst (having the highest acid strength shows that there is no presence of crystalline MoO3. Pore size distribution of support did not change significantly after the deposition of Ni and Mo oxides. Mechanical strength of support also affects the strength NiMo catalyst. Support alumina-3 which has the highest mechanical strength gives the mechanical strength of the highest NiMo catalyst. Pengaruh sifat penyangga γ-alumina hasil pengembangan (alumina-1, alumina-2 dan alumina-3 pada karakter katalis hydrotreating nikel-molibdenum (NiMo telah dipelajari. Ketiga jenis γ-alumina diturunkan dari boehmite “Catapal B” dengan menvariasikan nisbah mol asam nitrat terhadap boehmite. Pembuatan γ-alumina menggunakan metoda sol-gel. Adsorpsi Nitrogen, X-ray difraksi (XRD, Temperature Programmed Reduction (TPR H2, Temperature Programmed Desorption (TPD NH3, dan kekuatan mekanik digunakan untuk

  4. Pengaruh Pencucian terhadap Sifat Fungsional Daging Lumat Ikan Patin Siam (Pangasius hypopthalmus

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    Suryanti Suryanti

    2011-12-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui pengaruh pencucian terhadap sifat fungsional daging lumat ikan patin siam (Pangasius hypopthalmus. Ikan patin siam hidup diperoleh dari kolam ikan di Parung, Bogor. Ikan diberok selama 24 jam, kemudian ikan dimatikan dengan perendaman dalam air es selama ± 20 menit. Daging dipisahkan dari tulang dan kulit hingga diperoleh filet daging. Filet dicuci dan dilumatkan dengan mincer. Daging lumat yang diperoleh dicuci satu sampai tiga kali dalam air pada s uhu 4–5oC dengan rasio 1:5 (w/v, kemudian dilanjutkan dengan penyaringan dan pengepresan. Sebagai kontrol adalah daging lumat yang dipress tanpa melalui pencucian dan penyaringan. Hasil penelitian menunjukkan bahwa pencucian satu kali menghasilkan sifat fungsional terbaik dalam hal water holding capacity41,98%, sifat emulsi (aktivitas emulsi 0,37 dan stabilitas emulsi 48,37%, serta kekuatan gel 1364 g cm. Komposisi proksimat daging lumat dengan pencucian satu kali menghasilkan kadar air 81,21%, protein 87,25% (bk, abu 1,63% (bk, dan lemak 10,29% (bk.

  5. Pengaruh Suhu dan Metode Perlakuan Panas terhadap Sifat Fisika dan Kualitas Finishing Kayu Mahoni

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    Ragil Widyorini

    2016-03-01

    Full Text Available Perlakuan panas dikenal sebagai metode yang dapat digunakan untuk meningkatkan stabilitas dimensi dan menurunkan higroskopisitas. Di sisi lain, perlakuan panas dapat membuat warna kayu menjadi lebih gelap, penurunan sifat mekanika kayu, dan sifat wetabilitas kayu. Oleh karena itu, penelitian mengenai perlakuan panas pada kondisi yang optimum sangat menarik untuk dilakukan agar menghasilkan kayu dengan kualitas yang lebih baik. Tujuan penelitian ini adalah mengetahui pengaruh interaksi suhu dan metode perlakuan panas terhadap sifat fisika dan kualitas finishing kayu mahoni. Contoh uji perlakuan dibuat dari kayu mahoni yang berasal dari industri penggergajian kayu rakyat. Penelitian ini menggunakan 2 metode perlakuan panas yaitu metode oven dan penguapan (steaming pada variasi suhu 90°C, 120°C, dan 150°C selama 2 jam waktu efektif. Pengujian sifat fisika diuji berdasarkan standar ASTM, yang meliputi : kadar air seimbang, perubahan dimensi, perubahan warna, dan wetabilitas. Pengujian finishing meliputi cross cut test, uji delaminasi, dan uji kekilapan (glossy test. Hasil penelitian menunjukkan bahwa interaksi antara suhu dan metode perlakuan panas berpengaruh sangat nyata terhadap perubahan warna, serta berpengaruh nyata terhadap penyusutan radial, cross cut test, dan uji delaminasi. Metode oven menghasilkan contoh uji dengan kadar air dan pengembangan radial yang lebih rendah, warna yang lebih terang, serta uji delaminasi yang lebih baik dibandingkan dengan metode penguapan. Kata kunci: perlakuan panas, metode oven, metode penguapan, suhu, finishing   Effect of temperature and heat treatment on physical properties and finishing quality of mahagony wood Abstract Heat treatment is well known as a method for increasing dimensional stability and reducing hygroscopicity of wood. However, heat tratment can cause the color of wood become darker and reduce the wettability, as well as its mechanical properties. Therefore, the optimum condition of heat

  6. KORELASI KOMPOSISI UNSUR TERHADAP SIFAT TERMAL SERBUK BAHAN BAKAR U-ZrHX

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    Masrukan Masrukan

    2016-10-01

    Full Text Available ABSTRAK KORELASI KOMPOSISI UNSUR TERHADAP SIFAT TERMAL SERBUK BAHAN BAKAR      U-ZrHx. Telah dilakukan analisis untuk menentukan korelasi komposisi terhadap sifat termal pada serbuk bahan bakar U-ZrHx. Serbuk U-ZrHx dibuat dari proses hidriding ingot U-Zr, dimana ingot U-Zr merupakan hasil peleburan logam U dan Zr. Dalam percobaan ini dibuat tiga variasi serbuk yaitu U-35ZrHx, U-45ZrHx, dan U-55ZrHx. Perlunya dilakukan penentuan kadar Zr terhadap sifat termal adalah untuk mengetahui pengaruh kadar Zr terhadap sifat transformasi panas dari bahan bakar tersebut. Mula –mula dilebur logam U dan Zr didalam tungku peleburan busur listrik hingga menghasilkan ingot U-Zr. Ingot U-Zr selanjutnya dibuat serbuk dengan teknik hidridring-milling hingga menghasilkan serbuk U-Zr. Serbuk U-Zr dianalisis komposisi dengan menggunakan teknik sepektroskopi serapan atom (SAA dan sepektroskopi UV-Vis. Hasil analisis komposisi menunjukkan bahwa pada analisis untuk menentukan kandungan U dan Zr hampir semua sampel uji yang dianalisis mempunyai perbedaan yang cukup besar antara kandungan U dan Zr yang ditentukan dengan hasil analisis U dan Zr terkecuali hasil analisis pada serbuk U-45Zr yang hanya berbeda 0,609 %. Dari hasil pengujian unsur pengotor diperoleh bahwa semua unsur pengotor yang ada masih memenuhi persyaratan untuk bahan. Pengujian kapasitas panas yang dilakukan pada rentang temperatur 35ºC hingga 437ºC memperlihatkan bahwa nilai kapasitas yang paling besar adalah serbuk U-35ZrHx dengan nilai kapasitas panas sebesar 0,13 J/g.oC. Sementara itu dari pengujian transisi perubahan fasa diperoleh bahwa pada U-45ZrHx mengalami dua tahapan reaksi disertai perubahan fasa. Dapat disimpulkan apabila dilihat dari kandungan U dan Zr  belum bisa digunakan untuk bahan bakar, sedangkan dari analisis kandungan unsur pengotor diperoleh bahwa semua unsur yang ada masih  memenuhi persyaratan untuk bahan bakar kecuali unsur Fe. Sementara itu hasil analisis sifat termal

  7. Pengaruh Kecepatan Homegenisasi Terhadap Sifat Fisika dan Kimia Krim Nanopartikel dengan Metode High Speed Homogenization (HSH

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    Galuh Suprobo

    2015-06-01

    Full Text Available Nanoparticle cream is the development of nanotechnology in cosmetics fields for improving the function of cream. High speed homogenization (HSH is one of the methods for creating nanoparticle cream. In this research, the use of natural materials based palm oil derivative  such as stearic acid, cetil alcohol, cetil stearil alcohol was chosen in nanoparticle cream producing by using HSH methods.The speed variable of  homogenization of 1000 rpm, 1500 rpm, 2,000 rpm and 2,500 rpm  intended to find out the influence of speed toward the  properties of cream product. The observation result showed the influence on physical display in term of texture but not in homogeneity , stability and cream color. The pH of the product during two months storage for all variables were still stable. The particle size was increased in the homogeneity of speed at 2000 rpm and 2500 rpm. In this research has produced the cream in particle size from 239.86 to 358.10 nm which enter in nanoparticle category 50 nm to 1000 nm. The stability of nanoparticle cream product in the range of 97,20 to 98%.ABSTRAKKrim nanopartikel merupakan pengembangan nanoteknologi di bidang kosmetik untuk meningkatkan fungsi krim tersebut. High speed homogenization (HSH merupakan salah satu metoda dalam pembuatan krim nanopartikel. Pada penelitian ini, krim nanopartikel dibuat menggunakan bahan baku alami turunan kelapa sawit yaitu asam stearat, setil alkohol, setil stearil alkohol dengan metoda HSH. Variabel kecepatan homogenisasi pada 1000 rpm, 1500 rpm, 2000 rpm dan 2500 rpm dimaksudkan untuk mengetahui pengaruh kecepatan terhadap sifat-sifat krim. Hasil menunjukkan bahwa perubahan kecepatan homogenisasi dalam reaktor berpengaruh terhadap tampilan fisik dari segi tekstur, akan tetapi tidak mempengaruhi terhadap kehomogenan, stabilitas dan warna krim. Dari pengamatan selama 2 bulan penyimpanan diketahui tidak terjadi perubahan pH selama penyimpanan untuk keempat variabel. Ukuran partikel

  8. Pengaruh variasi berat polimer terhadap sifat fisik Patch NaF

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    Diyah Fatmasari

    2018-04-01

    mendapatkan plester dengan variasi berat polimer yang menghasilkan sifat fisik yang baik. Desain penelitian adalah quasy experimental dengan post test groupresearch design sebagai rancangan penelitian. Variabel pengaruh adalah variasi polimer dan lama penyimpanan (1 dan 7 hari, variabel terpengaruh adalah ketebalan, daya tahan terhadap lipatan, berat, kandungan obat, persentase moisture uptake dan persentase loss on drying. Pembuatan plester NaF menggunakan solvent casting method PVA; PVP dipanaskan dalam water bath sampai polimer larut; NaF 100 mg diaduk dalam 2 ml aquabides; 0,1 ml asam oleat; 0,1 ml IPA dicampur menjadi satu dalam tabung kacadan dilarutkan dalam 3,8 ml aquabides. Dibuat 3 jenis plester NaF dengan konsentrasi polimer bervariasi. Semua bahan kemudian dicampur menjadi satu dalam tabung kaca dan diaduk sampai larut, dituang dalam cawan petri dan didiamkan selama ± 3 hari. Jika sudah kering maka matriks diambil dengan pisau khusus dan disimpan dalam alumunium foil sampai digunakan. Hasil penelitian menunjukkan adanya perbedaan sifat fisik pada ke tiga jenis plester NaF. Plester dengan perbandingan PVP : PVA = 1 : 2 menghasilkan sifat fisik paling baik. Penyimpanan dalam alumunium foil tidak menyebabkan terjadinya perbedaan sifat fisik plester NaF. Plester NaF dengan variasi polimer yang baik dapat dikembangkan untuk penelitian selanjutnya. Perlu dikembangkan plester NaF dengan variasi polimer terbaik.

  9. PENGARUH VARIASI TEKANAN PENGEPRESAN DAN KOMPOSISI BAHAN TERHADAP SIFAT FISIS BRIKET ARANG

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    Reni Setiowati

    2014-10-01

    Full Text Available Bahan bakar alternatif diperlukan untuk pengganti sumber daya alam yang tidak dapat diperbarui.Salah satu bahan bakar alternatif tersebut yang dikembangkan adalah briket arang dengan memanfaatkan limbah biomassa.Pada penelitian ini dibuat briket arang dengan mengkaji pengaruh variasi tekanan pengepresan dan komposisi bahan terhadap sifat fisis briket arang. Proses karbonisasi pada tempurung kelapa 450ºC selama 15 menit. Serbuk kayu dikarbonisasi menggunakan klin drum selama 4-5 jam. Perbandingan komposisi bahan tempurung kelapa dengan serbuk kayu adalah sebagai berikut 75%:25%, 25%:75%, 50%:50%, 100%:0%, 0%: 100% dengan tekanan pengepresan 50 N/cm2, 100 N/cm2,150N/cm2. Pengeringan briket dilakukan di dalam oven dengan suhu 60°C selama 24 jam. Briket berbentuk silinder dengan diameter 5 cm.Hasil penelitian menunjukkan briket paling optimum dengan perbandingan komposisi bahan 100% tempurung kelapa menggunakan tekanan antara 100-150 N/cm2 dengan nilai parameter uji sebagai berikut densitas 0.634 gr/cm3, kekuatan mekanik 43.167 N/cm2 dan lama pembakaran 64,39 menit.

  10. Pengaruh Fermentasi Bakteri Asam Laktat Terhadap Sifat Fisikokimia Tepung Gadung Modifikasi (Dioscorea hispida

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    R. Haryo Bimo Setiarto

    2016-06-01

    Full Text Available Yam (Dioscorea hispida is one of the tubers belonging to the family dioscoreaceae. Yam tubers not only have high content of carbohydrate, but also contain some toxic compounds such as: cyanogenic glycosides, alkaloids dioscorin, dehydrodioscorin, saponin and sapogenin. Fermentation of yam tubers can affected for physicochemical and amylography characteristics of modified yam flour and reduced toxic compounds. This study was aimed to determine effect of lactic acid bacteria (LAB fermentation on the physicochemical properties and characteristics of yam flour amilography modification. From the 15 isolates of Lactobacillus plantarum had been selected two isolate (L. plantarum B291 and B307 with the highest amylase enzyme activity to be used as starter fermentation to produce modified yam flour. Fermentation of LAB could reduce levels of HCN on modified yam flour, although decreased levels of HCN was not significant with requirements of SNI. Fermentation of LAB increased levels of protein, fat and lactic acid, but decreased pH value and carbohydrate content in modified yam flour. Based on results of amylography analysis, control of yam flour with shredded without fermentation had the best gelatinization profile because it most resistant about heating.ABSTRAKGadung (Dioscorea hispida merupakan salah satu jenis umbi-umbian yang tergolong dalam family Dioscoreaceae.  Ubi gadung memiliki kandungan karbohidrat yang tinggi, akan tetapi juga mengandung beberapa senyawa racun berupa glikosida sianogenik, alkaloid dioscorin, dehydrodioscorin, saponin dan sapogenin yang berbahaya bagi kesehatan. Fermentasi umbi gadung dapat mempengaruhi sifat fisikokimia dan amilografi tepung gadung modifikasi serta menurunkan senyawa toksiknya. Penelitian ini bertujuan untuk mengetahui pengaruh bakteri asam laktat (BAL penghasil amilase terhadap sifat fisikokimia dan amilografi tepung gadung modifikasi. Sebanyak 15 isolat Lactobacillus plantarum telah diseleksi, sehingga

  11. Pengaruh Media Lagu Terhadap Hasil Belajar Matematika Pada Materi Sifat-Sifat Bangun Datar Siswa Kelas 5 SD Negeri 5 Kota Bengkulu

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    Myti Sandri

    2018-03-01

    Full Text Available Abstrak. Penelitian ini bertujuan  untuk mengetahui pengaruh media lagu terhadap hasil belajar matematika pada materi sifat-sifat bangun datar untuk siswa kelas 5 SD Negeri 5 Kota Bengkulu Tahun Ajaran 2015/2016 Semester II. Populasi penelitian ini adalah siswa kelas 5 SD Negeri 5 Kota Bengkulu. Sampel penelitian ini dua kelas yaitu  kelas eksperimen yang menerapkan metode ekspositori dengan menggunakan media lagu dan  kelas kontrol yang menerapkan metode ekspositori tanpa menggunakan media lagu. Teknik pengumpulan data dengan menggunakan instrumen tes. Untuk analisis data menggunakan uji-t dengan data berdistribusi normal dan homogen. Berdasarkan hasil penelitian diperoleh nilai rata-rata siswa yang diajar dengan menggunakan media lagu lebih tinggi dibandingkan dengan nilai rata-rata siswa yang diajar tanpa menggunakan media lagu. Nilai rata-rata siswa kelas eksperimen adalah 72.04 dan  nilai rata-rata siswa kelas kontrol adalah 60.21. Hal ini sesuai dengan hasil uji hipotesis nilai thitung = 1.8282 lebih dari nilai ttabel = 1.67065 dalam taraf signifikan 5%. Maka H0 ditolak sehingga dapat disimpulkan bahwa ada pengaruh media lagu terhadap hasil belajar matematika pada sifat-sifat bangun datar kelas 5 SD Negeri 5 Kota Bengkulu. Kata kunci : Hasil belajar, Media Lagu, Metode Ekspositori. Abstrak. The aim of research is knowing how to the effect of media songs on the study’s result of mathematics learning on the material of the two dimentionals characters for student class 5.C SD Negeri 5 Kota Bengkulu school of year 2015/2016 Semester II. Population of this research  is student class 5 SD Negeri 5 Kota Bengkulu. Sample of this research is student class 5.C by 31 student for the experiment class apply to expository methods to use media songs and class 5.A by 31 student for control class to apply expository method not to use media songs. The tecnich data collection is instrument test. For data analysis using t-test with normal distribution

  12. PENGARUH STRATEGI PEMBELAJARAN PRAKTIKUM SIFAT KOLIGATIF TERHADAP HASIL BELAJAR SISWA KELAS XII

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    Muhammad Hubbi

    2017-01-01

    Full Text Available  Abstract: The process of learning colligative properties have tend to learn chemistry as a product so that students have difficulty understanding this topic. Guided inquiry-based learning laboratory is a learning strategy that can accommodate chemistry learning as product and process. This research aims to know the effect of practice learning strategy based on guided inquiry to the instructional result of year 12 of science of MA Ma’arif 7 Lamongan on the topic of colligative properties of solution. The instructional result is the score from a report of practice result and written test. The subject of this research is 34 students of 12-E IPA class of MA Ma’arif 7 Lamongan in the academic year 2015-2016. The research design that used is the one group pretest-posttest. The research instruments used written test and observation checklist. The written test measured the result of validated instrcution before it is used and has reliability 0,802. The obtained data then was analysed with a descriptive analysis and different test. The different test used t-paired test. Paired t-test results obtained sig 0,000 which is smaller than 0.05 so H0 is rejected by 95% reliability. Based on these results it can be concluded that there was significant improvement of learning outcomes using laboratory procedures of colligative properties. The average value of student learning outcomes was increased from 61.05 into 81.44. This increase showed that the practice learning based on guided inquiry had a good level of effectiveness.Abstrak: Proses pembelajaran materi sifat koligatif cenderung hanya mempelajari kimia sebagai produk sehingga siswa mengalami kesulitan dalam memahami topik ini. Pembelajaran praktikum berbasis inkuiri terbimbing merupakan strategi pembelajaran yang dapat mengakomodasi pembelajaran kimia sebagai produk dan proses. Penelitian ini bertujuan untuk mengetahui pengaruh strategi pembelajaran praktikum berbasis inkuiri terbimbing terhadap hasil

  13. Pengaruh Perlakukan Alkali terhadap Sifat Fisik, dan Mekanik Serat Kulit Buah Pinang

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    Cokorda Putri Kusuma Kencanawati

    2018-04-01

    Full Text Available Makalah ini menganalisis pengaruh perlakukan alkali dan tanpa perlakukan alkali terhadap karakateristik fisik, morfologi dan sifat mekanik serat kulit buah pinang (areca Catechu L.. Selama ini pemanfaatan limbah pertanian belum dilakukan secara maksimal, sehingga dapat menimbulkan pencemaran terhadap lingkungan. Serat kulit buah pinang (Areca Husk Fiber/AHF selama ini hanya dipergunakan sebagai bahan bakar biomassa dan media tanam sedangkan untuk pemanfaatan lain belum ada sama sekali. AHF diberi perlakukan NaOH 2,5%, 5%, 7,5% dan 10% dengan waktu perendaman 2 jam pada temperatur kamar, untuk mengetahui karakteristik fisik AHF maka dilakukan pengukuran panjang dan diameter serat, pengujian densitas, pengujian kadar air dan moisture sedangkan untuk mengetahui karakteristik mekanik dilakukan pengujian tarik serat tunggal sesuai dengan ASTM D 3379. Dari penelitian ini diketahui bahwa diameter AHF mengalami pengurangan diameter akibat perlakukan alkali, hal ini terkait dengan hilangnya kandungan lignin, pektin dan wax. Densitas AHF menurun dengan meningkatan prosentase NaOH bila dibandingkan dengan AHF tanpa perlakukan NaOH. Kekuatan tarik bervariasi dengan adanya perlakuan alkali.  Kekuatan tarik AHF tertinggi pada serat yang mengalami perlakukan NaOH 5% yaitu sebesar 165 Mpa dan kekuatan tarik terendah pada AHF dengan perlakuan Alkali 10% yaitu sebesar 137 MPa . This paper analyzes the effect of alkali and non-alkali treatments on the physical characteristics, morphology and mechanical properties of betel nut huks fiber (areca Catechu L.. the used of agricultural waste has not been done optimally, causing environmental pollution. Areca Husk Fiber (AHF only used as biomass fuel and planting medium, while for the other uses it has not existed. AHF was given 2.5%, 5%, 7.5% and 10% NaOH treatment with 2 hours immersion at room temperature, to known the physical characteristics of AHF then measured the length and diameter of fiber, density test, water

  14. Sifat Fisika Mekanika dan Ketahanan Papan Partikel Bambu dengan Perekat Asam Sitrat terhadap Serangan Rayap Kayu Kering

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    Ragil Widyorini

    2016-03-01

    Full Text Available Penelitian mengenai penggunaan asam sitrat sebagai agen pengikat alami masih relatif sedikit. Oleh karena itu penelitian ini difokuskan pada pengaruh jumlah asam sitrat dan suhu pengempaan terhadap sifat papan partikel bambu, termasuk ketahanannya terhadap serangan rayap kayu kering. Bahan penelitian adalah partikel bambu petung. Komposisi kimia bahan baku bambu diuji untuk kadar ekstraktif, holoselulosa, lignin, dan alfa selulosa. Faktor pada penelitian ini adalah jumlah asam sitrat (0 - 40% berdasarkan berat kering udara partikel dan suhu pengempaan (200 oC dan 220 oC. Sifat fisika dan mekanika papan partikel diuji berdasarkan standar pengujian JIS A 5908. Analisis menggunakan Fourier transform infrared spectroscopy (FTIR juga dilakukan untuk mengetahui perubahan gugus ester pada berbagai jumlah asam sitrat dan suhu pengempaan. Pengujian ketahanan terhadap serangan rayap kayu kering juga dilakukan dengan menghitung nilai pengurangan berat dan mortalitas rayap setelah 6 minggu. Hasil pengujian menunjukkan bahwa interaksi kedua faktor berpengaruh nyata terhadap nilai pengembangan tebal, penyerapan air, modulus elastisitas dan modulus patah. Intensitas gugus C=O yang ditunjukkan pada puncak 1720 cm-1 semakin bertambah besar seiiring dengan semakin banyaknya jumlah asam sitrat, yang menyebabkan kekuatan perekatan dan stabilitas dimensi papan partikel menjadi semakin kuat. Kondisi optimum pada penelitian ini adalah papan partikel dengan penambahan jumlah asam sitrat 20 % pada suhu pengempaan 200 oC dengan kualitas yang dapat memenuhi standar JIS A 5908 tipe 8. Penambahan asam sitrat dapat meningkatkan mortalitas rayap kayu kering secara nyata. Penambahan 20 % asam sitrat pada suhu pengempaan 200 oC menghasilkan nilai pengurangan berat 0,9 % dan mortalitas rayap 57 %. Kata kunci: bambu petung, asam sitrat, suhu pengempaan, jumlah asam sitrat.   Mechanical properties and durability against the dry termite attacks of particleboard made from bamboo

  15. Pengaruh Degasser Dan Grain Refiner Terhadap Sifat Mekanik Paduan Al-Si Produk Cor

    OpenAIRE

    Yohanes, Glenn; Djamil, Sofyan

    2008-01-01

    Paduan aluminium banyak digunakan pada industri otomotif, seperti pada pembuatan velg dan komponen-komponen mesin. Studi pengaruh degasser dan grain refiner terhadap kekuatan tarik, kekuatan luluh, elongasi dan kekerasan, pada proses peleburan dibandingkan dengan atau tanpa menggunakan degasser dan grain refiner. Benda uji didapat dengan melebur blok mesin Mitsubishi L.300, menggunakan tungku listrik dan proses cor sistem cetakan terbuka. Hasil penelitian, meliputi kekuatan tarik, luluh, elon...

  16. Pengaruh Degasser dan Grain Refiner terhadap Sifat Mekanik Paduan Al-Si Produk Cor

    OpenAIRE

    Yohanes, Glenn; Djamil, Sofyan

    2009-01-01

    Paduan aluminium banyak digunakan pada industri otomotif, seperti pada pembuatan velg dan komponen-komponen mesin. Studi pengaruh degasser dan grain refiner terhadap kekuatan tarik, kekuatan luluh, elongasi dan kekerasan, pada proses peleburan dibandingkan dengan atau tanpa menggunakan degasser dan grain refiner. Benda uji didapat dengan melebur blok mesin Mitsubishi L.300, menggunakan tungku listrik dan proses cor sistem cetakan terbuka. Hasil penelitian, meliputi kekuatan tarik, luluh, elon...

  17. Pengaruh Massa Zn Dan Temperatur Hydrotermal Terhadap Struktur Dan Sifat Elektrik Material Graphene

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    Muhammad Rizki Ilhami

    2014-09-01

    Full Text Available Kemajuan teknologi yang sangat berkembang pada saat ini membutuhkan material yang tidak hanya kecil ataupun ringan, tetapi juga memiliki sifat thermal, elektrik, dan mekanik yang baik. Graphene adalah material yang dapat menjawab kebutuhan hal tersebut. Permasalahan yang kemudian muncul adalah proses sintesis massal yang masih menjadi kendala. Penelitian ini bertujuan untuk mensintesis material graphene dengan metode hydrothermal dan menggunakan serbuk Zn sebagai reduktor. Penelitian ini menganalisa pengaruh varaiasi penambahan massa sebesar 0,8 gram, 1,6 gram, dan 2,4 gram zinc serta variasi temperatur hydrthermal 160ᵒC, 180ᵒC, 200ᵒC. Proses karakterisasi material graphene dilakukan dengan pengujian Scanning Electron Microscope (SEM, X-Ray Diffraction (XRD, Fourier Transform Infraredspectroscopy, Thermo Gravimetric Analysis/Differential Scanning Calorimetry (TGA/DSC, dan Four Point Probe digunakan untuk mengetahui nilai konduktivitas elektrik material. Morfologi dari graphene yang dihasilkan berbentuk lembaran-lembaran transparan dan tipis yang saling menumpuk.Semakin banyak serbuk Zn yang diberikan menjadikan permukaan graphene semakin tipis. Nilai konduktivitas elektrik terbesar dihasilkan dari variasi panambahan serbuk zinc sebesar 2,4 gram dan temperatur hydrothermal sebesar 180ᵒC dengan nilai sebesar 0,012526 S/cm.

  18. Pengaruh Penambahan Karbon terhadap Sifat Mekanik dan Konduktivitas Listrik Komposit Karbon/Epoksi sebagai Pelat Bipolar Polimer Elektrolit Membran Sel Bahan Bakar (Polymer Exchange Membran(PEMFC

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    Ara Gradiniar Rizkyta

    2013-03-01

    Full Text Available Sel bahan bakar merupakan sel elektrokimia yang mampu mengkonversi bahan bakar menjadi energi listrik. Lebih dari 70% dari total berat dan 60%  biaya dalam  fuel cell berupa pelat bipolar. Maka dibutuhkan pemilihan bahan yang sesuai untuk mereduksi berat, volume dan biaya  pada sel bahan bakar. Penelitian ini bertujuan untuk mengetahui pengaruh karbon terhadap sifat mekanik dan konduktivitas listrik komposit karbon/epoksi. Matriks yang digunakan adalah epoksi dengan hardener poliamino amid dengan  rasio pencampuran 20 dan 80% poliamino amid. Filler yang digunakan adalah karbon dengan kadar karbon 20, 40, 60 dan 80%.  Bahan campuran dimatangkan dalam furnace pada temperatur 50, 100, 150, 200, 240oC selama satu jam. Pengujian yang dilakukan yaitu FT-IR, tarik, SEM, TGA dan konduktivitas listrik. Hasil pengujian menunjukkan penambahan karbon  dapat meningkatkan Modulus Young tetapi menurunkan sifat tarik dan elongasi. Kekuatan tarik epoksi tertinggi adalah 61 MPa, sedangkan pada 20% karbon 18,9 MPa. Stabilitas thermal meningkat dengan penambahan karbon, data 60% karbon menunjukkan  berat sisa pada 800⁰ C senilai 63%. Penambahan karbon juga dapat menaikkan konduktivitas listrik. Data tertinggi diperoleh pada komposisi 80% karbon yaitu 424,8 S.Cm-1

  19. Pengaruh Substitusi Tepung Pisang pada Pembuatan Brownies terhadap Sifat Kimia dan Penerimaan Organoleptik

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    Sifia Silfia

    2012-12-01

    , protein, dan uji organoleptik terhadap rasa, aroma, dan tekstur. Hasil penelitian menunjukkan bahwa pembuatan brownies pisang memberikan hasil yang optimal pada perlakuan penggunaan tepung pisang 75% dengan kadar serat kasar 1.88%, kadar air 38.01%, protein 12.09%, tekstur, rasa, dan aroma disukai panelis.

  20. Pengaruh Kecepatan Pengadukan dan Kehalusan Gambir Serta Variasi Komposisi Terhadap Beberapa Sifat Fisika dalam Pembuatan Tinta Cetak

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    Hendri Muchtar

    2015-12-01

    Full Text Available Ink is a very important element that determines the quality of a printout. One of the potential natural materials that can be used as a raw material for making printing ink is gambier.The objective of this study was to observe the effect of stirring speed and particle size on some physical properties in the printing ink. The ink manufacturing was done in 2 phases, namely the manufacture of color pigment and ink formulation. Pigment ink was made by cleaning the gambier through dilution with hot water, filtration, and precipitation of fitrat. Furthermore the gambier was mashed with particle size variation 40, 60, 80 mesh. The adding saturated FeCl3 compounds in ethanol into the extract gambier slowly with stirring speed 250, 500, 750 rpm for 4 hours. The color of the pigment, viscosity, and the particle size was tested by using the PSA method (particle size analyzer. Manufacture of ink formula with additives propylene glycol 7.5; 10; 12.5 mL and polyethylene glycol 0.1; 0.3; and 0.5 mL for every 30 ml of extract gambier in ethanol. Best pigment was obtained from the use of gambier 60 mesh powder, stirring speed 250 rpm, the smallest pigment particle was 47.54 nm. The best ink formula was using propylene glycol and polyethylene glycol 12.5 mL and 0.5 mL. The characteristics of ink were black colored ink with a density 0.9633 at a temperature of 28-30°C, viscosity 0.9 cP, and surface tension 0.2539 N/m.ABSTRAK Tinta merupakan unsur yang sangat penting menentukan kualitas hasil cetakan. Salah satu bahan alam potensial yang dapat dijadikan sebagai bahan baku pembuatan tinta cetak adalah gambir. Penelitian ini bertujuan untuk mengamati pengaruh kecepatan pengadukan dan kehalusan bahan baku gambir terhadap beberapa sifat fisika dalam pembuatan tinta cetak. Pembuatan tinta dilakukan 2 tahap yaitu pembuatan pigmen dan formula tinta. Pigmen tinta dibuat dengan cara membersihkan  gambir melalui pelarutan dengan air panas, penyaringan, dan pengendapan

  1. Pengaruh Pemberian Margarin terhadap Sifat Fisiko Kimiawi dan Sensoris Sosis Ayam Petelur Afkir (The Effect of Margarine Application on Physicochemical and Sensory Properties of Culled Hens Layer Sausages

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    Hendronoto Arnoldus Walewengko Lengkey

    2016-12-01

    Full Text Available Research was aimed to determine the effect of margarine application on the physicochemical and sensory properties of culled layer hens sausages. In addition to utilizing the culled layer hens meat as a source of animal protein, as well as to diversify food, so that the resulting product can be accepted by consumers. This study was conducted in a completely randomized experimental design with four treatments unidirectional pattern with margarine giving addition 0.0 %; 2.5 %; 5.0 % and 7.5 % with four replications. The data obtained were statistically tested by analysis of variance (ANOVA, if there is a noticeable difference, then it continued to Duncan's multiple range test. The analysis showed that the water content, fat content, and pH sausage has significant effect, but the protein content was not significantly between the sausages were not given margarine (P-1 and the sausages are given margarine (P-2, P-3 and P-4. The sausage produced will increase the protein content, fat content, and pH with increasing percentage of margarine given, otherwise the moisture content will decrease. Based on sensory testing (appearance, color, flavor, texture and total acceptance, culled layer hens sausage can be accepted by consumers. Sausages were given margarine value ranges between 7.0 to 8.4 (just like - really like and were not given margarine has lower value ranging from 5.2 to 6.9 (neutral - just like.   ABSTRAK Penelitian mengenai pengaruh pemberian margarin terhadap sifat fisiko kimiawi dan sensoris sosis ayam petelur afkir adalah untuk mengetahui penambahan margarin terhadap kualitas sosis ayam petelur afkir, selain itu untuk memanfaatkan daging ayam petelur afkir sebagai sumber protein hewani, dan untuk melakukan penganekaragaman pangan, sehingga produk yang dihasilkan dapat diterima oleh konsumen. Penelitian ini dilakukan secara eksperimental dengan rancangan acak lengkap pola searah dengan empat perlakuan pemberian margarin 0,0 %; 2,5 %; 5

  2. PENGARUH VARIASI PUTARAN CETAKAN, INOKULAN TI-B PADA CENTRIFUGAL CASTING TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO PADUAN ALUMINIUM A356.0

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    Eko Nugroho

    2015-06-01

    Full Text Available Paduan alumunium  A-356.0 merupakan  salah satu bahan material yang cocok untuk bahan baku pembuatan velg racing (cast wheel mobil maupun sepeda motor. Karena memiliki beberapa kelebihan seperti: ringan, tahan korosi dan warnanya menarik, namun memiliki kekurangnan yaitu sifat mekanisnya belum memenuhi syarat. proses pembuatannya  menggunakan proses Vertical Centrifugal Casting (VCC dengan penambahan inokulan Al-Ti-B sebagai unsur penghalus butir, inokulan Al-Ti-B akan dicampurkan kedalam 8 kg cairan aluminium dengan komposisi variasi campuran 0, 6, 9, dan 12 gram untuk selanjutnya dituangkan ke dalam cetakan dengan 2 variasi putaran yaitu 450 dan 850 rpm. Selanjutnya hasil dari pengecoran centrifugal casting diuji secara mekanis menggunakan pengujian standar yaitu; uji kekerasan, uji tarik dan struktur mikro nya mengunakan standar ASTM. Hasil pengujian di peroleh nilai kekerasan dan kekuatan tarik  yang paling tinggi pada spesimen A3 dan B3 yaitu 64.73 BHN dan 67.81 BHN, 182.18 Mpa  dan 188.28 Mpa. Titanium  yang  dikombinasikan  dengan  Boron  atau  Carbon  merupakan  unsur  paduan Al-Si  yang  berfungsi  untuk  menghaluskan butiran  (grain  refiner Hal  inilah  yang mempengaruhi  adanya  perubahan  sifat mekanik  dan  struktur  mikro  tersebut.  Dengan semakin  halus  butiran,  maka  penjalaran dislokasinya  akan  semakin  sulit,  sehingga mempunyai ketahanan yang lebih besar, karena diperlukan  energi  yang  lebih  besar  untuk merusak  butiran  yang  halus  tersebut. adanya gaya sentrifugal (CF selama proses penuangan kedalam cetakan. Logam cair akan dilempar oleh gaya sentrifugal sehingga menimbulkan tekanan pada setiap layer, hal ini juga menjelaskan bahwa .produk yang dibuat dengan menggunakan metode ini bebas cacat porosity, sisi terluar dari produk sentrifugal akan memiliki nilai kekerasan yang tinggi dibandingkan dengan sisi tengah produk, sifat mekanisnya juga akan memiliki nilai yang

  3. PENGARUH VARIASI PUTARAN CETAKAN DAN PENAMBAHAN INOKULAN Ti-B PADA CENTRIFUGAL CASTING TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO PADUAN ALUMINIUM A356.0

    Directory of Open Access Journals (Sweden)

    Eko Nugroho

    2016-08-01

    Full Text Available Perkembangan industri pengecoran global hingga lokal sampai saat ini tumbuh dengan sangat pesat. Salah satu produk yang banyak dicari konsumen adalah velg, part pada roda sepeda motor. Tetapi sayangnya velg lokal sering dikeluhkan memiliki kualitas lebih rendah dari pabrikan. Paduan alumunium  A-356.0 merupakan  salah satu bahan material yang cocok untuk bahan baku pembuatan velg racing (cast wheel mobil maupun sepeda motor. Karena memiliki beberapa kelebihan seperti: ringan, tahan korosi dan warnanya menarik, namun memiliki kekurangnan yaitu sifat mekanisnya belum memenuhi syarat. proses pembuatannya  menggunakan proses Vertical Centrifugal Casting (VCC dengan penambahan inokulan Al-Ti-B sebagai unsur penghalus butir, inokulan Al-Ti-B akan dicampurkan kedalam 8 kg cairan aluminium dengan komposisi variasi campuran 0, 6, 9, dan 12 gram untuk selanjutnya dituangkan ke dalam cetakan dengan 2 variasi putaran yaitu 450 dan 850 rpm. Selanjutnya hasil dari pengecoran centrifugal casting diuji secara mekanis menggunakan pengujian standar yaitu; uji kekerasan, uji tarik dan struktur mikro nya mengunakan standar ASTM. Hasil pengujian di proleh nilai kekerasan dan kekuatan tarik  yang paling tinggi pada spesimen A3 dan B3 yaitu 64.73 BHN dan 67.81 BHN, 182.18 Mpa  dan 188.28 Mpa. Titanium  yang  dikombinasikan  dengan  Boron  atau  Carbon  merupakan  unsur  paduan Al-Si  yang  berfungsi  untuk  menghaluskan butiran  (grain  refiner Hal  inilah  yang mempengaruhi  adanya  perubahan  sifat mekanik  dan  struktur  mikro  tersebut.  Dengan semakin  halus  butiran,  maka  penjalaran dislokasinya  akan  semakin  sulit,  sehingga mempunyai ketahanan yang lebih besar, karena diperlukan  energi  yang  lebih  besar  untuk merusak  butiran  yang  halus  tersebut. adanya gaya sentrifugal (CF selama proses penuangan kedalam cetakan. Logam cair akan dilempar oleh gaya sentrifugal sehingga menimbulkan tekanan pada setiap

  4. KONDISI SIFAT FISIK DAN KIMIA TANAH PADA BEKAS TAMBANG NIKKEL SERTA PENGARUHNYA TERHADAP PERTUMBUHAN TRENGGULI DAN MAHONI

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    Merryana Kiding Allo

    2017-06-01

    Full Text Available Mining activities through land clearing, dredging and backfilling will lead to changes in the ecosystem. Land conditions badly damaged among other unproductive, high erosion and loss of top soil layer of soil. The physical properties of the soil pH is acid soil, the texture increased dust causes soil compacted is difficult to be processed and chemical properties of the soil decreased to lower and lower, that it can not support the root system of plants and would affect the plant growth is not normally. The need for nutrients origin of organic fertilizers and inorganic fertilizers combined with the planting hole and alcosorb can spur the growth of trengguli and mahoni that is expected to speed up the recovery process mined lands of nickel. Planting  trengguli and mahogany produced by percentage grew to 95% by using a experiments using completely randomized design (CRD with a combination of the size of the hole, the dosage of fertilizer and alcosorb on trengguli and mahoni plants produce the best height and diameter growth on the kind trengguli obtained from treatment of the planting hole size 0.30 mx 0.40 mx 0.30 m ( A2 15 kg of organic fertilizer (B3 with alcosorb 3 gr and the best diameter growth in mahoni generated by the use of manure dosage of 7.5 kg and 7.5 gr NPK (B2. Kegiatan penambangan secara land clearing, pengerukan dan penimbunan  akan menyebabkan perubahan ekosistem. Kondisi lahan rusak berat antara lain tidak produktif, terjadi erosi berat dan hilangnya lapisan top soil tanah. Sifat fisik fisik pH tanah menjadi masam, tekstur debu meningkat menyebabkan pemadatan tanah sukar diolah dan sifat kimia tanah menurun menjadi makin rendah, sehingga tidak dapat mendukung sistem perakaran tanaman dan akan berdampak pertumbuhan tanaman tidak normal. Kebutuhan akan unsur hara asal pupuk organik maupun pupuk anorganik yang dikombinasikan dengan lubang tanam dan alcosorb dapat memacu pertumbuhan tanaman jenis trengguli dan mahoni yang

  5. PENGARUH VARIASI SUHU PADA PROSES SELF TEMPERING DAN VARIASI WAKTU TAHAN PADA PROSES TEMPERING TERHADAP SIFAT MEKANIS BAJA AISI 4140

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    Sunardi Sunardi

    2016-07-01

    Full Text Available Tujuan penelitian ini adalah untuk mengetahui sifat mekanis pada baja AISI 4140 dengan proses tempering dengan variasi waktu tahan dan variasi suhu pada proses self tempering. Material terlebih dahulu dipanaskan pada suhu 850°C, di tahan dengan waktu 14 dan 28 menit, media pendinginan adalah Oli SAE 20. Pada proses tempering baja dipanaskan kembali dengan suhu 200°C di tahan dengan waktu 30 dan 120 menit. Sedangkan untuk proses self tempering, baja di panaskan pada suhu 850°C di tahan dengan waktu 14 dan 28 menit kemudian didinginkan, suhu yang harus dicapai pada pendinginan adalah 200°C, 400°C dan 600°C. Proses tempering dengan variasi waktu tahan mempunyai nilai kekerasan terbesar 50,1 HRC dengan waktu tahan 120 menit, sedangkan nilai kekerasan terbesar pada proses self tempering dengan variasi suhu adalah 29,68 HRC pada suhu 200°C. Nilai ketangguhan terbesar pada saat proses tempering adalah 0,341 (J/mm2 dengan waktu tahan 120 menit, sedangkan pada saat proses self tempering ketangguhan terbesar pada suhu 600°C dengan nilai 0,375 (J/mm2. Laju korosi terbesar pada saat tempering adalah 0,055 (mpy dengan waktu tahan 30 menit, sedangkan pada saat proses self tempering laju korosi terbesar pada suhu 400°C dengan nilai 0,0388 (mpy. 

  6. PENGARUH BERBAGAI KECAMBAH KACANG-KACANGAN LOKAL SEBAGAI BAHAN DASAR MEAT ANALOG TERHADAP SIFAT FISIK (TEKSTUR, KESUKAAN DAN RASIO ARGININ/LISIN

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    Bayu Kanetro

    2013-06-01

    kedelai. Meat analog dibuat dari protein berbagai kecambah kacang-kacangan lokal, yaitu kacang kara benguk, tunggak, dan kecipir yang dikecambahkan berturut-turut selama 48, 36 dan 24 jam. Protein kecambah kacang kara benguk, tunggak dan kecipir untuk memproduksi meat analog diekstraksi pada pH 9, selanjutnya dipresipitasi berturut-turut pada pH 4, 5, dan 4. Produk-poduk yang diperoleh dianalisis tekstur, sifat sensoris (tingkat kesukaan terhadap warna, tekstur, bau, rasa dan keseluruhan, dan rasio arginin/lisin. Karakteristik meat analog dari berbagai kecambah kacang-kacangan lokal tersebut dibandingkan dengan meat analog dari biji kedelai untuk menentukan jenis kecambah terbaik sebagai bahan dasar meat analog. Hasil penelitian menunjukkan bahwa karakteristik meat analog kecambah kacang tunggak dan kecipir lebih baik dibandingkan meat analog dari kecambah kara benguk. Meat analog dari biji kedelai masih lebih baik daripada meat analog dari kecambah kacang-kacangan, khususnya teksturnya. Kandungan arginin yang diketahui sebagai komponen hipokolesterolemik dan hipoglisemik pada meat analog kecambah kacang tunggak ternyata lebih rendah daripada meat analog kedelai, tetapi rasio arginin/lisinnya tidak berbeda nyata. Sedangkan rasio arginin/lisin meat analog dari kecambah kacang-kacangan lainnya lebih rendah daripada meat analog dari biji kedelai. Oleh karena itu meat analog dari kecambah kacang tunggak dipilih sebagai produk terbaik dan berpotensi sebagai pangan fungsional utamanya untuk menurunkan kolesterol darah. Kata kunci: Meat analog, kecambah, kacang-kacangan lokal, rasio arginin/lisin

  7. Penentuan Waktu dan Suhu Pengeringan Optimal Terhadap Sifat Fisik Bahan Pengisi Bubur Kampiun Instan Menggunakan Pengering Vakum

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    Yulia Helmi Diza

    2014-12-01

    Full Text Available Research to improve the quality of kampiun instant porridge had been done with the treatment temperature and time of drying using a vacuum drying. The aim of the study was to determine the optimal drying temperature and time in the filler manufacture of instant kampiun porridge consisted of instant rice porridge, instant mung beans, black rice porridge and banana instant. To the obtained products were tested the physics test which covered yield, moisture content, density kamba, water absorption capacity, and rehydration time. The results of analysis from various treatments showed that the optimum treatment for instant rice porridge was drying temperature 60oC for 6 hours, for instant mung beans was drying temperature 60oC for 6 hours, for instant banana was drying temperature of 50oC for 6 hours, and for black sticky rice porridge was drying temperature 60oC for 6 hours.ABSTRAKPenelitian peningkatan mutu bubur kampiun instan telah dilakukan dengan perlakuan suhu dan waktu pengeringan menggunakan alat pengeringan vakum. Tujuan penelitian adalah untuk menentukan suhu dan waktu pengeringan optimal dalam pembuatan bahan pengisi bubur kampiun instan, yang terdiri dari bubur beras instan, kacang hijau instan, bubur ketan hitam instan dan pisang instan. Terhadap produk yang dihasilkan dilakukan uji fisika meliputi rendemen, kadar air, densitas kamba, kapasitas penyerapan air, dan waktu rehidrasi. Hasil analisis terhadap berbagai perlakuan menunjukkan perlakuan optimal untuk bubur beras instan adalah suhu pengeringan 60oC selama 6 jam, untuk kacang hijau instan adalah suhu pengeringan 60oC selama 6 jam, untuk pisang instan adalah suhu pengeringan 50oC selama 6 jam dan untuk bubur ketan hitam instan adalah suhu pengeringan 60oC selama 6 jam.

  8. Pengaruh Panjang Serat Terhadap Nilai Koefisien Absorpsi Suara dan Sifat Mekanik Komposit Serat Ampas Tebu dengan Matriks Gipsum

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    Stefanus Laga Suban

    2015-03-01

    Full Text Available Penelitian ini dilakukan untuk membuat material komposit gipsum berpenguat serat alam untuk bahan penyerap suara. Permasalahan yang dikaji adalah untuk mengetahui hubungan panjang serat pada komposit ampas tebu bermatrik  gipsum terhadap nilai koefisien absorpsi suara (α, kekuatan tekan, dan kekuatan lenturnya. Panjang serat yang digunakan adalah 10mm, 30mm, dan 50mm  dengan fraksi volum 30% serat : 70% gipsum. Tujuannya untuk mendapatkan hubungan nilai koefisien absorpsi suara, kuat lentur, dan kuat tekan dengan panjang serat yang diberikan serta aplikasinya dalam material bahan penyerap suara yang memenuhi standar ISO 11654. Metode pembuatan spesimen komposit yang digunakan adalah hand lay up. Metode pengujian berdasarkan standart ASTM E1050 untuk pengujian koefisien absorpsi suara, ASTM D790 untuk pengujian kuat lentur, dan ASTM D695 untuk pengujian kuat tekan. Dari hasil pengujian didapatkan nilai koefisien absorpsi suara memenuhi standar ISO 11654 dengan nilai koefisien α lebih besar dari 0,15. Nilai kuat lentur terbaik ialah pada panjang serat 30mm sebesar 1,952 MPa. Nilai kuat tekan terbaik ialah pada panjang serat 50mm sebesar 2,005 MPa

  9. PENGARUH PERSENTASE PELEPAH KELAPA SAWIT (Elaeis guineensis Jack DAN KULIT DURIAN (Durio Zibethinus Murr TERHADAP SIFAT FISIKA DAN MEKANIKA PAPAN SEMEN

    Directory of Open Access Journals (Sweden)

    Violet Burhanuddin

    2016-08-01

    Full Text Available Penelitian sifat fisika meliputi kerapatan, kadar air, penyerapan air dan pengembangan tebal dan sifat mekanika meliputi keteguhan lentur (MoE keteguhan patah (MoR serta  pengurangan tebal akibat tekanan. Rancangan Percobaan Yang digunakan adalah rancangan acak lengkap (RAL dengan 3 perlakuan yaitu 100% pelepah kelapa sawit; 100% kulit durian dan  50% pelepah kelapa sawit : 50% kulit durian dengan 3 kali ulangan. Standar yang digunakan untuk perbandingan  yaitu SNI–03– 2104-1991-A. Hasil penelitian adalah sebagai berikut : Sifat Fisika yaitu kerapatan rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 0,90 gr/ cm3, 0,91 gr/ cm3, 0,81 gr/ cm3, Kadar air rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 7,37%, 6,59%, 7,08%, Penyerapan air rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 49,51%, 44,99%, 50,11%, Pengembangan tebal rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 1,67%, 2,04%, 3,44%, Kerapatan, kadar air, penyerapan air dan pengembangan tebal tidak berpengaruh nyata. Sifat Mekanika yaitu Keteguhan lentur (MoE rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 7.350,68 kg/cm2, 3.590,43 kg/cm2, Keteguhan patah (MoR rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 11,82kg/cm2, 8,66kg/cm2, 4,53 kg/cm2Pengurangan tebal akibat tekanan rata-rata antara 100% Pelepah Kelapa Sawit, 100% Kulit Durian dan 50% Pelepah kelapa sawit : 50% kulit Durian berturut-turut adalah 8,92 %, 10,01 %, 9,92 %, Keteguhan patah (MoR berpengaruh nyata sedangkan keteguhan

  10. Pengaruh Lama Miling Terhadap Sifat Absorpsi Material Penyimpan Hidrogen MgH2 yang Dikatalisasi Dengan Fe (The Role of Milling Time on the Absorption Behaviour of MgH2 Catalyzed by Fe

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    Mustanir Mustanir

    2009-12-01

    Full Text Available Hidrida logam berbasis MgH2 dengan sisipan 1 wt% katalis Fe telah berhasil disintesis dengan teknik ball milling. Hasil proses miling selama 80 jam menunjukkan bahwa ukuran butir material telah membentuk struktur nanokristal. Hal ini ditunjukkan oleh profil difraksi sinar-X dimana terjadi pelebaran puncakpuncak difraksinya dengan meningkatnya waktu miling. Hasil uji absorpsi secara gravimetrik diketahui bahwa MgH2 berkatalis 1 wt% Fe mampu menyerap hydrogen sebesar 5,5 wt% dalam waktu ~20 menit pada temperatur 300 oC. Hasil ini sekaligus memperlihatkan bahwa sejumlah kecil katalis Fe bekerja secara baik dalam memperbaiki sifat absorpsi material penyimpan hydrogen berbasis Mg.(Metal hydrides are of great interest as hydrogen storage media especially for automotive application. Hydrides of magnesium and magnesium alloys are particularly attractive as they combine potentially high hydrogen storage capacities, 7.6 wt%. But, unfortunately, the sorption properties are poor. For example, conventional hydrogenation of magnesium requires prolonged treatment at temperatures of 300 oC and above. Here, we report the absorption properties of MgH2 catalyzed with a small amount of Fe element (1wt% under argon atmosphere prepared by ball milling in 80 hours. As the results, it showed the influence of milling time on the absortion kinetics of material which could absorp hydrogen in amount 5.5 within 20 minutes at 300 oC. It is obvious that longer milling time and small amount of catalyst could improve the sorption properties of Mg-based hydrides. © 2009 BCREC UNDIP. All rights reserved[Received: 13rd November 2009, Revised: 25th December 2009, Accepted: 31st December 2009][How to Cite: M. Mustanir, Z. Jalil. (2009. Pengaruh Lama Miling Terhadap Sifat Absorpsi Material Penyimpan Hidrogen MgH2 yang Dikatalisasi Dengan Fe (The Role of Milling Time on the Absorption Behaviour of MgH2 Catalyzed by Fe. Bulletin of Chemical Reaction Engineering and Catalysis, 4(2: 69

  11. PENGARUH VARIASI SUHU POST WELD HEAT TREATMENT ANNEALING TERHADAP SIFAT MEKANIS MATERIAL BAJA EMS-45 DENGAN METODE PENGELASAN SHIELDED METAL ARC WELDING (SMAW

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    Rusiyanto Rusiyanto

    2012-02-01

    Full Text Available Penelitian ini bertujuan Untuk mengetahui nilai kekerasan Vickers material Baja EMS-45 sebelum proses pengelasan dan setelah dilakukan proses pengelasan tanpa post weld heat treatment annealing, Untuk mengetahui berapakah suhu optimal post weld heat treatment annealing untuk material baja EMS-45 dengan variasi suhu yang digunakan 350 o C, 550 o C, dan 750 C. Untuk mengetahui struktur mikro dari material baja EMS-45 akibat variasi suhu post weld heat treatment annealing pada proses pengelasan dengan menggunakan metode pengelasan shielded metal arc welding. Bahan atau material dasar yang digunakan pada penelitian ini adalah Baja EMS-45 dengan ketebalan pelat 10 mm, lebar pelat 20 mm dan panjang 100 mm. Berdasarkan hasil pengujian nilai kekerasan tertinggi setelah proses pengelasan terletak pada daerah Logam Las. Pengelasan non PWHT memiliki nilai kekerasan paling tinggi setelah proses pengelasan yaitu sebesar 183,2 VHN. Suhu optimal Post Weld Heat Treatment Annealing untuk material baja EMS-45 adalah pada suhu 750 C. Karena pada PWHT pada suhu tersebut mengalami penurunan kekerasan yang besar yaitu sebesar 127,2 VHN, sehingga material baja EMS-45 dapat memperbaiki sifat mampu mesinnya. Struktur mikro dari material baja EMS-45 sebelum proses pengelasan berupa grafit serpih, perlit dan ferit, setelah dilakukan proses pengelasan mempunyai struktur mikro berupa matrik ferit dan grafit pada daerah logam las, matrik perlit kasar dan grafit serpih pada daerah HAZ dan struktur perlit, grafit serpih dan ferit pada daerah logam induk o o

  12. Pengaruh Penambahan Ni, Cu, dan Al dan Waktu Milling pada Mechanical Alloying Terhadap Sifat Absorpsi dan Desorpsi Mg sebagai Material Penyimpan Hidrogen

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    Febrian Budi Pratama

    2012-09-01

    Full Text Available Mg merupakan salah satu material yang digunakan sebagai material penyimpan hidrogen dengan membentuk MgH2. Sifat absorpsi dan desorpsi hidrogen dari suatu metal hidrida salah satunya tergantung  pada bahan, unsur penambah, dan metode pembuatannya. Pada penelitian kali ini Mg sebagai material penyimpan hidrogen dihasilkan melalui metode mechanical alloying dengan unsur penambah Ni, Cu, dan Al dan variasi waktu milling 10, 20, 30 jam. Selanjutnya sampel dilakukan pengujian SEM, XRD, DSC, dan Uji hidrogenisasi. Dari data uji diperoleh bahwa meningkatnya waktu milling menurunkan ukuran partikel sehingga meningkatkan wt% hidrogen terabsorb dan menurunkan temperatur onset desorpsi. Namun efek aglomerasi dan coldwelding yang berlebih pada proses mechanical alloying mengakibatkan ukuran partikel menjadi lebih besar. Unsur pemadu Al dan Cu berfungsi sebagai katalis, sedangkan Ni berfungsi sebagai pemadu yang ikut bereaksi dengan hidrogen. Mg10wt%Al dengan waktu milling 20 jam mempunyai nilai weight percent terbaik H2 yaitu 0.38% dalam temperatur hidrogenisasi 2500C, tekanan 3 atm, dan waktu tahan 1 jam. Sedangkan Mg10wt%Al dengan waktu milling 30 jam memiliki temperatur onset paling rendah yaitu 341.490C Kata Kunci— Absorpsi, Desorpsi, Material Penyimpan Hidrogen, Mechanical Alloying, Mg

  13. Boron

    Science.gov (United States)

    Boron is an essential micronutrient element required for plant growth. Boron deficiency is wide-spread in crop plants throughout the world especially in coarse-textured soils in humid areas. Boron toxicity can also occur, especially in arid regions under irrigation. Plants respond directly to the...

  14. Sifat filler kayu keruing terhadap vulkanisat karet

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    Herminiwati Herminiwati

    1999-12-01

    Full Text Available The purpose of this research was to investigate the properties of keruing wood filler in their application on vulacanized rubber of shoes soles. To know its suitability for rubber goods filler, the properties of keruing wood filler was investigated by comparing with carbon black N330. Keruing wood filler were made by carbonization process at temperature 450oC for one hour and activation process with NaCl 4% for twenty four hours, followed by pyrolisis at temperature 500oC for one hour. Filler were milled and sieved by 400 mesh siefter. The standard compound formula was prepared base on ASTM D 3192 with various filler level of keruing wood filler, carbon black N330 either separately formulated of combination. The research showed that using keruing wood filler in the amount of 30-70 phr could meet 75% the requirements of SNI. 12-0172-1987 : Canvas shoes for general purpose, where as carbon black N330 in the amount of 30-70 phr could meet 87,5% the requirements of SNI. 12-0172-1987. Combination of keruing wood filler and carbon black showed that keruing wood filler could substitute 25-57 phr of carbon black.

  15. PENGARUH UMUR PANEN RUMPUT LAUT Eucheuma cottonii TERHADAP SIFAT FISIK, KIMIA DAN FUNGSIONAL KARAGENAN Effect of Harvest Time of Seaweed Eucheuma cottonii on Physical, Chemical and Fungsional Properties of Carra- geenan

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    Djagal W. Marseno

    2012-05-01

    Full Text Available The aim of this study was to evaluate the effect of different harvesting times of Eucheuma cottonii on both physical, chemical and functional properties of carrageenan. Seaweed Eucheuma cottonii was obtained from water territorial of Tablolong Kupang. The study was carried out into two steps. The first step was to investigate the effect of harvesting time of 30, 45, and 60 days after planting on physical and chemical properties of obtained carrageenan. The second step was to study the effect of functional properties of obtained carrageenan on viscocity and the stability of tomato sauce. The results showed that seaweed which was harvested in 45 days after planting has good physical and chemical properties of carrageenan in term of moisture 12.45 %; protein 5.03 %; extract ether 1.40 %; ash 21.29 %; carbohy- drate 72.28 %; sulphate 19.69 %; and crude extract 48.20 %. The obtained carrageenan at concentration of 1,5%, also give highest viscocity of 11.50-45 cps and gel strength of 0.8961-4.0709 kg/cm2. Further identification show that the obtained carrageenan produced was classified as kappa carrageenan and at 0,2 % (w/v was able to stabilize tomato sauce up to 86 % and viscosity of 60 cps after 2 weeks of storage at room temperature. ABSTRAK Tujuan penelitian adalah mengkaji sifat fisik dan kimia karagenan yang diperoleh dari rumput laut Eucheuma cot- tonii pada umur panen yang berbeda dari perairan Tablolong Kupang dan mengetahui sifat fungsionalnya sebagai stabilizer dan thickener dalam saos tomat. Penelitian diawali dengan menanam rumput laut pada interval tanam yang berbeda, sehingga pada saat panen yang bersamaan diperoleh rumput laut dengan umur yang berbeda yaitu 30, 45,60 hari. Tahap berikutnya adalah ekstraksi dan karakterisasi karaginan yang dihasilkan, kemudian aplikasi karaginan yang diperoleh untuk menjaga stabilitas viskositas saos tomat pada konsentrasi karagenan (0,1 %, 0,15 %, 0,2 % b/v. Hasil penelitian menunjukkan bahwa

  16. SIFAT FISIK-KIMIA DAN ORGANOLEPTIK BAWANG GORENG PALU PADA BERBAGAI FREKUENSI PEMAKAIAN MINYAK GORENG

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    Nur Alam

    2015-02-01

    diulang tiga kali. Frekuensi pemakaian minyak goreng pengaruhnya sangat nyata menurunkan warna, tekstur, kadar air, minyak dan tingkat kesukaan panelis terhadap kerenyahan bawang goreng Palu serta meningkatkan laju oksidasi asam lemak tidak jenuh  pada minyak goreng. Mutu fisik-kimia dan organoleptik bawang goreng Palu secara berturut-turut terbaik diperoleh dari penggorengan menggunakan minyak goreng segar, 1, 2 dan 3 kali pemakaian. Pemakaian minyak goreng > 3 kali, asam lemak bebas telah teroksidasi sehingga kurang layak untuk digunakan jika ditinjau dari aspek daya tahan simpan bawang goreng dan kesehatan. Kata kunci: Bawang goreng, sifat fisik-kimia dan organoleptik, frekuensi pemakaian minyak goreng

  17. Pemberdayaan Pembelajaran Materi Ajar Identifikasi Sifat-Sifat Bangun Datar Bagi Pengembangan Nilai Karakter Berpikir Kritis dan Logis

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    Afia Rahmadini

    2012-06-01

    Full Text Available Kesuksesan seseorang tidak ditentukan semata-mata oleh pengetahuan dan kemampuan teknis (hard skill saja, tetapi lebih oleh kemampuan mengelola diri dan orang lain (soft skill.Salah satu upaya untuk mengatasi permasalahan tersebut adalah dikeluarkannya Permendiknas no. 41 tahun 2007 tentang standar proses dan UU No 20 Tahun 2003 Tentang Sistem Pendidikan Nasional pada Pasal 3. Pertanyaan utama dalam penelitian ini adalah: bagaimanakah hasil pengembangan dan ketercapaian pelaksanaan perangkat pembelajaran matematika berbasis pemanfaatan lingkungan dan alat peraga manipulatif pada materi pokok mengidentifikasi sifat-sifat bangun datar di SDN Sekaran 01? Bagaimanakah kualitas proses pembelajaran dengan menggunakan perangkat yang dikembangkan? Penelitian ini termasuk penelitian Research and Development dengan menggunakan Model 4 D yang meliputi tahap pendefinisian (define, tahap perancangan (design, tahap pengembangan (develop. Sementara tahap penyebaran (disseminate tidak dilakukan mengingat terbatasnya waktu dan biaya.  Adapun hasil penelitian ini adalah (1perangkat pembelajaran berupa RPP dengan lampiran- lampirannya yang berupa LAS, LTS, prototype APM, dan setting lingkungan yang valid; (2 perangkat dapat diterapkan dengan kategori keterlaksanaan adalah terlaksana dengan baik, KBM berjalan lancar dan pembelajaran mampu memacu semua siswa untuk aktif sehingga secara empiris perangkat yang dikembangkan efektif untuk diterapkan dalam proses pembelajaran; (3 kualitas proses pembelajaran cukup tinggi hal ini ditinjau dari hasil belajar siswa dengan ketuntasan kelas 88,37%, motivasi belajar  25,58% siswa tinggi dan 74,42% siswa memiliki motivasi sangat tinggi, respon siswa positif sebanyak 97,67% dan kesan guru terhadap penerapan perangkat yang dikembangkan positif  sebanyak 100%. 

  18. Respon 2 Varietas Padi (Oryza Sativa L.) Terhadap Pyraclostrobin Dalam Efisiensi Penyerapan Nitrogen

    OpenAIRE

    Rudyanto, Mochamad Yusuf; Basuki, Nur; Kuswanto, Kuswanto

    2014-01-01

    Penggunaan varietas unggul serta berumur pendek memiliki sifat responsif terhadap aplikasi nitrogen. Pyraclostrobin merupakan fungisida sistemik berbentuk emulsi yang dapat larut dalam air dan memiliki fungsi sebagai Zat Pengatur Tanaman (ZPT) yang dapat menjadi pemicu pertumbuhan dan hasil tanaman. Tujuan dari penelitian adalah mengkaji pyraclostrobin dalam peningkatan efisiensi nitrogen dan produktivitas serta pertumbuhan tanaman padi. Bahan percobaan varietas padi yaitu varietas Ciherang d...

  19. Penelitian pengaruh penambahan karet reclaim terhadap sifat- sifat kuat tarik, kemuluran dan volume terkikis kompon karet

    Directory of Open Access Journals (Sweden)

    Prayitno Prayitno

    1990-12-01

    Full Text Available Reprocessed of wastevulcanized rubber products, known as reclaim rubber, is used as a filler in rubber soles. Uncorrect usage of reclaim rubber in rubber sole manufacturing can decrease the product performance such as as tensile streangth, elongation break and abrasion resistance. In this experiment, by comparison of 30, 40, 50, 60 and 70 parts of reclaim rubber to the 100 part of natural rubber (RSS sow that tensile strength decreased to 174.138, 160.118, 140.574, 134.092, and 449,60, 437.20, 426.00, 403.80 and 396.60% nrespectively, whereas abrasion resistance decreased to 0,2491, 0,4781, 0,5267, 0.7909, and mm3 / kgm respectively.

  20. Beberapa Sifat dari Modul dan Gelanggang dengan Dimensi Goldie Berhingga (Suatu Kajian Pustaka

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    Amir Kamal Amir

    2012-11-01

    Full Text Available Suatu modul M dikatakan mempunyai demensi Goldie berhingga jika modul tersebuttidak memuat suatu jumlahan langsung dari takberhingga banyak submodul-submodultaknol. Sedangkan, suatu gelanggang R dikatakan mempunyai dimensi Goldie kanan berhinggajika gelanggang tersebut mempunyai dimensi Goldie berhingga sebagai suatu modul kanan.Tulisan ini akan menyajikan beberapa sifat dari modul dan gelanggang yang mempunyai dimensiGoldie berhingga. Sifat-sifat tersebut bukanlah merupakan sifat-sifat yang baru. Namundemikian, tulisan ini akan menyajikan pembuktian dari sifat-sifat tersebut dengan cara yanglebih terperinci dan lengkap sehingga lebih mudah dimengerti, terutama bagi pembaca pemuladalam bidang aljabar.

  1. Pengaruh variasi rasio HAF/SRF terhadap sifat vulkanisat NBR

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    Ihda Novia Indrajati

    2012-12-01

    Full Text Available The objectives of the research were to study the effect of HAF/SRF black ratio and the loading of sulfur on vulcanization characteristic, swelling behaviour and compression set of NBR vulcanizates. The ratio of HAF/SRF were 0/70; 10/60; 20/50; 30/40; 35/35; 40/30; 50/20 and 70/0 phr, respectively. The observation of this research consist of curing characteristic, morphology property and swelling equilibrium. Curing characteristic was determined from cure rate index (CRI, vulcanizates morphology was studied by SEM and swelling equilibrium was conducted by immersion test using benzene. The data were analyzed qualitatively to see the respond of the variable on physical properties. The curing characteristic of double filler vulcanizates was higher than those with single filler. Solvent uptake for double filler present in between to those with HAF or SRF. All of vulcanizates indicate the anomalous mass tranfer, with n>0,5 and constant k showed the same trend. The intrinsic diffusivity (D*, sorption and permeation coefficient showed similar trend and the maximum was obtained by the ratio HAF/SRF 0/70.

  2. Kepemimpinan Pendidikan: Tinjauan terhadap Teori Sifat dan Tingkah-laku

    OpenAIRE

    Muflihin, Muh. Hizbul

    2015-01-01

    The substance of education is learning activity. The key of education successfulness is correlation and interaction between teacher and headmaster as top level leader at school. The ability or competence of school leader (headmaster) to develop teacher spirit or other employee is depending on character and ways shown to them. Its mean that good manner and how to treat other team-member has significant effect to his success to implement leadership at school. Education leader, at every level—he...

  3. Kepemimpinan Pendidikan: Tinjauan Terhadap Teori Sifat Dan Tingkah-laku

    OpenAIRE

    Muflihin, Muh. Hizbul

    2008-01-01

    The substance of education is learning activity. The key of education successfulness is correlation and interaction between teacher and headmaster as top level leader at school. The ability or competence of school leader (headmaster) to develop teacher spirit or other employee is depending on character and ways shown to them. Its mean that good manner and how to treat other team-member has significant effect to his success to implement leadership at school. Education leader, at every level—he...

  4. Pembuatan Poros Berulir (Screw) untuk Pengupas Kulit Ari Kedelai Berbahan Dasar 50% Aluminium Profil dan 50% Piston Bekas dengan Penambahan 0,02 % Tib (Titanium Boron)

    OpenAIRE

    Wisnujati, Andika

    2016-01-01

    Aluminium paduan pada penelitian ini menggunakan campuran Aluminium profil dan piston bekas. Piston bekas digunakan untuk mendapatkan unsur Si yang cukup tinggi pada piston. Penambahan unsur TiB (Titanium-Boron) sebanyak 0,02% pada saat pengecoran diharapkan mampu memperbaiki sifat-sifat mekanis dan fisis aluminium sehingga diharapkan aluminium paduan ini memiliki kekuatan yang jauh lebih baik dibandingkan tanpa penambahan unsur apapun.Paduan aluminium untuk pembuatan screw akan dicor dengan ...

  5. KARAKTERISASI SIFAT-SIFAT BIOKIMIA EKSTRAK KASAR LIPASE EKSTRASELULER BAKTERI Azospirillum sp.PRD1

    Directory of Open Access Journals (Sweden)

    Santi Nur Handayani

    2011-11-01

    Full Text Available Enzim lipase mempunyai peranan penting dalam katalis berbagai reaksi industri satu diantaranya pembuatan flavor melalui reaksi esterifikasi. Lipase adalah biokatalis yang berperan besar dalam aplikasi bioteknologi, seperti dalam sintesis biopolimer, biodiesel, produksi obat, dan produksi flavor. Peningkatan penggunaan lipase untuk industri mendorong dilakukan penelitian untuk mendapatkan sumber-sumber lipase baru. Sumber lipase yang potensial salah satunya adalah bakteri Azospirillum sp.PRD1 dari isolat lokal Laboratorium Mikrobiologi, Fakultas Biologi Universitas Jenderal Soedirman. Tujuan penelitian adalah untuk mendapatkan ekstrak kasar lipase dan menentukan karakteristik sifat-sifat biokimiawinya. Metode yang digunakan antara lain peremajaan bakteri Azospirillum sp.PRD1, dan produksi inokulum, penentuan waktu produksi optimum dan fase pertumbuhan bakteri, ekstraksi dan produksi ekstrak kasar lipase dan penentuan karakteristik sifat-sifat biokimiawinya. Hasil penelitian diperoleh ekstrak kasar lipase dari inokulum berumur 7 jam dan medium produksi dengan induser minyak zaitun yang diinkubasi selama 3 jam memiliki aktivitas spesifik 7,0547 Unit/mg. Lipase ekstrak kasar optimum pada pH 7, suhu 40 oC dan waktu inkubasi selama 25 menit. Lipase merupakan metaloenzim dengan kofaktor Zn2+ , Mn2+, Hg2+, Ca2+, Co2+ and Mg2+.

  6. Pemanfaatan Vinasse -Limbah Industri Alkohol- untuk Perbaikan Sifat Fisik Tanah dalam Pengembangan Tebu (Saccharum officinarum L di Lahan Pasir Pantai

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    M. Zulfan Arrodli

    2016-05-01

    Full Text Available Lahan pasir pantai merupakan lahan bermasalah untuk pertanian karena sifat tanahnya tidak mendukung pertumbuhan tanaman dan vinasse merupakan limbah industri ethanol yang jumlahnya sangat besar yang apabila dibuang di lahan terbuka akan mencemari lingkungan. Penggunaan vinasse sebagai bahan perbaikan tanah tanpa memberikan pengaruh negatif kemungkinan dapat dikerjakan untuk tanah bertekstur kasar seperti tanah di lahan pasir pantai. Oleh karena itu dalam penelitian ini, vinasse akan dicoba digunakan untuk membudidayakan tebu pada media tanah yang diambil dari lahan pasir pantai. Penelitian menggunakan pendekatan percobaan pot faktorial 4x4 yang disusun dalam rancangan lingkungan acak lengkap dengan 3 ulangan. Hasil penelitian menunjukkan bahwa pemberian vinasse dengan dosis 60.000 l/ha hanya sekali pada awal penanaman tebu mampu memperbaiki kemampuan tanah menyimpan air. Vinasse terbukti tidak memberikan pengaruh kurang baik terhadap tanaman yang dibudidayakan, bahkan pemberian vinasse cenderung memperbaiki pertumbuhan tebu baik dilihat pada tinggi tanaman, diameter batang, berat kering akar dan tajuk, meskipun pengaruhnya tidak berbeda nyata.

  7. SIFAT FUNGSIONAL ISOLAT PROTEIN ‘BLONDO’ (COCONUT PRESSCAKE DARI PRODUK SAMPING PEMISAHAN VCO (VIRGIN COCONUT OIL DENGAN BERBAGAI METODE

    Directory of Open Access Journals (Sweden)

    Siti Permatasari

    2015-11-01

    OHC tidak menunjukkan perbedaan yang signifikan antar metode (p≤ 0,05. Hasil penelitian ini menyimpulkan bahwa metode fisik menghasilkan sifat fungsional terbaik. Kata kunci: Sifat fungsional, isolat protein, blondo, VCO

  8. Analisis Pengaruh Beban Terhadap Karakteristik dan Efisiensi Generator Arus Searah Penguatan Kompon Kumulatif dan Kompon Diferensial (Aplikasi pada Laboratorium Konversi Energi Listrik FT-USU)

    OpenAIRE

    Lubis, Syahrizal

    2015-01-01

    Salah satu jenis generator DC yang cukup banyak digunakan adalah generator DC kompon panjang dan generator DC kompon pendek. Berdasarkan sifat penguatnya terhadap jangkar generator kompon dibagi menjadi dua yaitu generator DC kompon diferensial dan generator DC kompon kumulatif. Pada karakteristik berbeban sebuah generator DC menunjukkan bagaimana hubungan antara tegangan terminal Vt dan arus medan If ketika generator dibebani. Pada generator DC penguatan kompon, peningkatan...

  9. Perbaikan Sifat Laju Transmisi Uap Air dan Antibakteri Edible Film dengan Menggunakan Minyak Sawit dan Jeruk Kunci

    Directory of Open Access Journals (Sweden)

    Budi Santoso

    2018-01-01

    Full Text Available The objective of the research was to improve water vapor transmission rate and antibacterial properties of edible film by using red palm oil and Citrus mitis. The research design was factorial completely randomized design with three replications. There were three studies: the addition of Uncaria gambir Roxb extract, palm oil concentration, and pH value at the concentration 0, 1.5, and 3 (% w/v; 0, 1.5, and 3 (% v/v; and 3, 4, 5, and 6 respectively. The results showed that interaction of Uncaria gambir Roxb extract, palm oil and pH had significant effected on solubility of edible film. Interaction of Uncaria gambir Roxb and palm oil had significant effected on thickness, percentage of elongation and solubility of edible film. Interaction of Uncaria gambir Roxb and pH had significant effected on solubility of edible film. Characteristic of edible film was produced thickness 0.15 to 0.28 mm, percentage of elongation 23.33 to 87.78%, solubility 33.9 to 49.16%, water vapor transmission rate 3.43 to 8.52 g.m-2.d-1, and inhibition zone for Staphylococcus aureus 0.2 to 8.2 mm. ABSTRAK Tujuan penelitian adalah untuk memperbaiki laju transmisi uap air dan sifat antibakteri edible film dengan menggunakan minyak sawit dan jeruk kunci. Rancangan penelitian yang digunakan adalah rancangan acak lengkap faktorial dengan tiga kali ulangan. Perlakuan terdiri atas konsentrasi ekstrak gambir; 0, 1,5, dan 3 (% b/v, konsentrasi minyak sawit; 0, 1,5, dan 3 (% v/v, dan pH (3, 4, 5, dan 6. Hasil penelitian menunjukkan bahwa interaksi ekstrak gambir, minyak sawit, dan derajat keasaman (pH berpengaruh nyata terhadap kelarutan edible film. Interaksi ekstrak gambir dengan minyak sawit berpengaruh nyata terhadap ketebalan, persen pemanjangan, dan kelarutan edible film. Interaksi minyak sawit dengan derajat keasaman (pH berpengaruh nyata terhadap kelarutan edible film. Interaksi ekstrak gambir dengan derajat keasaman (pH berpengaruh nyata terhadap kelarutan edible film

  10. KARAKTERISASI SIFAT FISIKOKIMIA DAN FUNGSIONAL FRAKSI PATI UWI UNGU (DIOSCOREA ALATA

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    Lula Nadia

    2015-04-01

    Full Text Available ABSTRACTSize fractionation of yam starch granule could be achieved through dry sieving Retsch Siever with 400 and 500 mesh. Although the fractionation was not completely separate the granule size, however it could provide a significant difference in average size of the fractions. Starch granule morphology, size distribution, amylose and phosphorus contents, crystal structure, thermal properties, and rheological characteristic of the starch fraction were evaluated. In this study, based on the average value of the granule size, significant effects of fraction were obtained on phosphorus content and relative crystallinity of the starch. The size fraction differences did not give a significant impact on its gelatinization character, while in the pasta formations the effect of the fraction was found in peak and final viscosity. In the bigger size fraction, the phosphorus content increased but the relative crystallinity decreased. These differences made the large size fraction of starch granule had the advantage in paste profiling than starches and fractions against stirring, heating and cooling for its potential use in food processing as thickner.Keywords: dioscorea alata, starch, size fractionation, size distribution, viscoelastisityABSTRAKFraksinasi ukuran granula pati uwi dapat dicapai dengan menggunakan pengayakan kering Retsch Siever 400 dan 500 mesh. Meskipun metode fraksinasi ini tidak sempurna memisahkan ukuran granula, tetapi dapat memberikan perbedaan yang signifikan dari nilai rerata ukuran fraksi. Penelitian ini bertujuan untuk mengevaluasi morfologi granula, distribusi ukuran, kandungan amilosa, kadar fosfor, struktur kristal dan kristalinitas relatif, sifat termal, serta karakteristik rheologi dari fraksi pati. Penelitian menunjukkan, berdasarkan nilai rerata ukuran granula, pengaruh signifikan dari fraksi diperoleh pada kandungan fosfor dan kristalinitas relatif pati. Perbedaan ukuran fraksi granula tidak cukup memberi pengaruh yang

  11. PENGARUH SIFAT FISIK TANAH PADA KONDUKTIVITAS HIDROLIK JENUH DI 5 PENGGUNAAN LAHAN (STUDI KASUS DI KELURAHAN SUMBERSARI MALANG Effect of Soil Physical Properties on Saturated Hydraulic Conductivity in The 5 Land Use (A Case Study in Sumbersari Malang

    Directory of Open Access Journals (Sweden)

    Elsa Rosyidah

    2013-11-01

    physical properties, SHC, water movement in soil, infiltration   ABSTRAK Pergerakan air dalam tanah jenuh akan mempengaruhi limpasan dan infiltrasi pada suatu daerah, sedangkan proses pergerakan air dalam tanah dipengaruhi oleh sifat-sifat fisik tanah. Perubahan penggunaan lahan sangat mempengaruhi sifat-sifat fisik tanah. Perubahan penggunaan lahan dan perbedaan sifatsifat dasar tanah yang meliputi alih fungsi lahan yang semula ada vegetasi menjadi lahan yang tak ada atau minim vegetasi mengakibatkan laju infiltrasi dan perkolasi pada tanah menjadi berubah dan memungkinkan terjadinya proses infiltrasi yang cukup besar, menyebabkan semakin berkurangnya daerah resapan air hujan secara langsung dan penurunan ketersediaan air tanah. Pengukuran pergerakan air dalam tanah kondisi jenuh atau Konduktivitas Hidrolik Jenuh tanah (KHJ sangat penting karena KHJ berperan dalam penentuan limpasan air, infiltrasi, dan perkolasi. Penelitian bertujuan untuk mengetahui besarnya nilai konduktivitas hidrolik jenuh tanah di berbagai penggunaan lahan dengan menggunakan metode constant head dan sifat fisik tanah meliputi tekstur tanah, berat isi, berat jenis, dan porositas di 5 penggunaan lahan pada 3 kedalaman tanah yang berbeda. Penelitian dilaksanakan di area Kelurahan Sumbersari pada bulan Desember 2008 hingga bulan Oktober 2009. Penelitian pengaruh sifat fisik tanah terhadap KHJ dengan menggunakan metode constant head pada 5 penggunaan lahan yaitu pemukiman penduduk (T1, lapangan (T2, kebun tomat (T3, semak belukar (T4, sawah irigasi (T5 pada 3 kedalaman yang berbeda yaitu 0-15 cm (K1, 15-30 cm (K2, dan 30-45 cm (K3. Sifat fisik tanah yang dianalisis antara lain tekstur tanah, berat isi, berat jenis, porositas, dan kadar air tanah. Hasil penelitian menunjukkan bahwa nilai KHJ tertinggi pada seluruh titik lokasi adalah lokasi sawah irigasi dengan kedalaman 30-45 cm. Faktor utama yang mempengaruhi nilai KHJ adalah nilai berat isi. Sifat-sifat fisik tanah yang mempengaruhi nilai KHJ

  12. Hubungan Parameter Sifat Magnetik Dan Sifat Keteknikan Tanah Pada Tanah Residual Vulkanik

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    Mela Faridlah

    2017-10-01

    Full Text Available Penelitian mengenai karakteristik tanah residual vulkanik menggunakan metode magnetik dan metode geoteknik telah dilakukan pada lereng stabil dan lereng longsor yang berada di Desa Langensari Kecamatan Lembang Kabupaten Bandung Barat Provinsi Jawa Barat. Penelitian ini dimaksudkan untuk mengetahui gambaran karakteristik suseptibilitas magnetik dan parameter keteknikan tanah residual vulkanik. Karakteristik geoteknik ditentukan melalui uji fisik berupa uji bobot isi, berat isi tanah basah, berat isi tanah kering, kadar air, derajat kejenuhan dan porositas, uji batas atterberg serta uji ukuran butir tanah.. Karakteristik magnetik ditentukan melalui uji suseptibilitas magnetik menggunakan Bartington MS2B (Magnetic Suseptibility System sensor B dual frekuensi yaitu 470 Hz dan 4,7 kHz. Hasil penelitian ini menunjukkan peningkatan nilai-nilai χLF (suseptibilitas frekuensi rendah dan χFD% (suseptibilitas bergantung frekuensi kearah horizon bagian atas profil tanah residual. Peningkatan nilai-nilai χLF dan χFD% ke arah horizon bagian atas merupakan karakteristik dari suseptibilitas magnetik.Dari hasil penelitian geoteknik dan magnetik didapatkan hasil jenis tanah residual vulkanik tersebut merupakan tanah lempung dengan mineral dominan yaitu Ilmenit. Hubungan antara parameter magnetik dan keteknikan tanah yaitu beberapa parameter keteknikan yang mempengaruhi sifat kemagnetan diantaranya berat isi tanah basah dan kadar air. Research on volcanic residual soil characteristics using magnetic methods and geotechnic methods was carried out on a stable slope and landslide slope are located in Langensari Lembang west Bandung, West Java Province. This study are intended to describe the characteristics of the magnetic susceptibility and residual volcanic soil engineering parameters. Geotechnical characteristics were determined by physical properties tests such as bulk density test, wet density, dry density, water content, degree of saturation and porosity

  13. SIFAT FISIKA DAN KETEGUHAN PATAH PAPAN SEMEN PARTIKEL DARI PELEPAH KELAPA SAWIT (Elaeis guineensis Jack

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    Violet Burhanuddin

    2016-08-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui kemungkinan pemanfaatan pelepah kelapa sawit sebagai bahan baku papan semen partikel dan untuk mengetahui sifat fisika dan mekanika papan semen partikel pada berbagai perbandingan semen dan partikel dari dua merek semen (Tonasa dan Tiga Roda. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL dengan pola faktorial 2 x 3 sebanyak 5 kali ulangan, dimana faktor A adalah merek semen yaitu semen tonasa dan semen Tiga Roda kemudian faktor B adalah perbandingan antara partikel dan semen. Hasil pengujian sifat fisika dan mekanika masing-masing menunjukan pengaruh yang sangat berbeda nyata, hal ini disebabkan karena semakin banyak penambahan jumlah perekat semen maka semakin baik pula sifat fisika dan mekanika papan semen yang dibuat, sedangkan untuk faktor merek semen tidak menunjukan perbedaan yang nyata. Kata kunci : Pelapah kelapa sawit, sifat fisika dan mekanika, papan semen partikel

  14. Peningkatan Sifat Mekanik Kawat Anyam (Wire Mesh) Baja Melalui Proses Pelapisan Nikel

    OpenAIRE

    Widagdo, Baskara Surya; Sulistyo, Sulistyo

    2017-01-01

    Teknologi pelapisan logam telah berkembang dengan pesat. Metode yang dikembangkan bervariasi. Salah satu tujuan teknologi pelapisan logam adalah untuk meningkatkan kualitas logam baik dari sifat ketahanan korosi maupun peningkatan ketahanan sifat mekanik seperti tahan aus maupun kekuatan tarik logam tersebut. Paper ini membahas tentang teknologi pelapisan logam berbentuk kawt anyam (wire mesh) menggunakan lapisan nikel. Kawat anyam dibersihkan dengan larutan HCl dan dicuci dengan air sabun ke...

  15. Boron reclamation

    International Nuclear Information System (INIS)

    Smith, R.M.

    1980-07-01

    A process to recover high purity 10 B enriched crystalline boron powder from a polymeric matrix was developed on a laboratory basis and ultimately scaled up to production capacity. The process is based on controlled pyrolysis of boron-filled scrap followed by an acid leach and dry sieving operation to return the powder to the required purity and particle size specifications. Typically, the recovery rate of the crystalline powder is in excess of 98.5 percent, and some of the remaining boron is recovered in the form of boric acid. The minimum purity requirement of the recovered product is 98.6 percent total boron

  16. SIFAT MEKANIK KOMPOSIT COKELAT BATANG DENGAN FILLER BIJI METE

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    P A Wiguna

    2015-07-01

    Full Text Available Bahan komposit yang banyak dijumpai di masyarakat umumnya terbuat dari material berat seperti, logam, keramik, atau polimer. Pada bahan pangan terdapat pula yang termasuk ke dalam kategori material komposit, diantaranya adalah cracker, cookie, kue pie, chasew chocolate, dan lain sebagianya. Diantara komposit bahan pangan tersebut yang paling banyak digemari sebagai makanan camilan adalah  cokelat. Hal menarik yang dikaji pada studi ini berkaitan dengan sifat mekanik komposit cokelat yaitu kekuatan tekan dari komposit tersebut. Komposit ini terbuat dari bahan makanan cokelat dengan variasi  fraksi massa mete sebagai filler yaitu 13 %, 17%, 20%, 23%, 26 %, dan 29%. Matriks yang digunakan adalah cokelat jenis dark chocolate. Sifat mekanik yang dikaji adalah kuat tekan pada komposit cokelat batang. Parameter ini diukur untuk mengetahui ukuran maksimum beban yang dapat diterima komposit tersebut. Komposit yang memiliki kekuatan tekan terbesar ada pada cokelat batang dengan fraksi massa mete 29 % yaitu sebesar 2,81 MPa. Hal ini menunjukkan  bahwa variasi fraksi massa mete berpengaruh pada sifat mekanik material komposit karena berkaitan dengan perilaku distribusi partikel. Kuat tekan komposit cokelat teramati meningkat dengan kenaikan jumlah biji mete pada cokelat batang.Generally, the composite materials found in the civilization are made from heavy materials, e.g. metals, ceramics, and polymers. In fact, the composite material also found in food, such as crackers, cookies, pies, and cashew chocolates. Cashew chocolates usually consumed as the most favourite snack. The most interesting object from this study is related with the mechanical composite characteristic of the chocolate, i.e. compressive strength. Chocolate composite is made from chocolate with variety of cashew mass fraction as the filler, i.e. 13 %, 17%, 20%, 23%, 26 %, and 29%. In this study, the composite matrix was a dark chocolate, whereas the mechanical characteristic determined

  17. TRANSFEKSI MERUPAKAN METODE TEKNOLOGI TRANSGENIK PENYISIPAN GREEN FLOURESCENT PROTEIN TERHADAP IKAN WILD BETTA

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    Eni Kusrini

    2015-06-01

    Full Text Available Teknik transfer gen banyak dikembangkan untuk mengintroduksi molekul DNA ke dalam embrio. Keberhasilan transfer gen menggunakan metode transfeksi ditentukan oleh berbagai faktor, antara lain pemilihan larutan transfeksi yang sesuai dengan mempertimbangkan kesediaan secara komersial, mudah diaplikasikan, keberhasilan tinggi, dan tidak bersifat toksik terhadap embrio. Studi awal untuk mengetahui keberhasilan transfer gen terhadap embrio ikan wild betta digunakan Green Fluorescent Protein (GFP dan juga dapat digunakan sebagai model terhadap ikan betta. GFP merupakan gen yang mengkodekan protein dan memiliki sifat berpendar hijau. Induk jantan dan betina dipijahkan dengan perbandingan 1:1 pada wadah baskom dengan ketinggian air ± 14 cm serta diberikan substrat. Transfeksi dilakukan pada embrio fase pembelahan 2 sel. Larutan transfeksi dibuat dari campuran DNA plasmid pada media NaCl 0.9% hingga mencapai konsentrasi akhir 100 μL media (campuran transfast + DNA + NaCl. Aktivitas gen ini dapat divisualisasikan dengan menggunakan sinar ultra violet. Keberhasilan dari teknik transfer gen tersebut dibuktikan dengan adanya ekspresi gen atau deteksi DNA gen GFP yang dimasukkan. Ekspresi hasil korporasi DNA ke dalam telur melalui transfeksi pada wild betta dan keberhasilan transfer gen GFP dapat dibuktikan dengan analisis PCR. Tujuan dari penulisan makalah ini adalah menguraikan tentang metode transfeksi yang efektif untuk teknologi transfer gen terhadap ikan wild betta.

  18. SIFAT MEKANIK BAHAN GESEK REM KOMPOSIT DIPERKUAT SERAT BAMBU

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    Sutikno -

    2012-01-01

    Full Text Available Bahan gesek komposit diperkuat serat bambu untuk kampas rem otomotif dibuat menggunakan mesin pres isostatik panas pada 19oC selama 3 jam. Jumlah serat bambu dan serbuk logam di dalam pencampuran dioptimasi, setiap komposisi komponen lain dibuat tetap, pengaruhnya pada sifat-sifat mekanik dan struktur mikro diselidiki. Serat bambu disini digunakan sebagai pengganti serat asbes yang jumlahnya divariasi antara 2,86-17,14% dari volume total dan fraksi berat masing-masing unsur penyusun ditentukan menggunakan energy dispersive X-ray spectroscopy. Angka kekerasan Brinell, kekuatan tarik maksimum, dan ketahanan aus khas bahan gesek yang difabrikasi berada pada rentang 21,7-43,4 kg/mm2, 0,021-0,036 ton, dan 1,5exp-11-5,2exp-11 m2/N.Friction materials of bamboo fibers reinforced composites for automotive brakes were made using hot isostatic pressing machine at 190oC for 3 hours. The contents of bamboo fiber and metal powder in the mixing were optimized, each composition of other components was fixed, its effects on mechanical properties and microstructure were investigated. Bamboo fibers were used here as substitutes for asbestos fibers whose number varied between 2.86 to 17.14% of the total volume and weight fraction of each constituent element is determined using energy dispersive X-ray spectroscopy. Brinell hardness number, the maximum tensile strength and specific wear resistance of friction materials fabricated in the ranges of 21.7 to 43.4 kg/mm2, 0.021 to 0.036 tons, and 1.5 exp-11-5, 2exp-11 m2 / N, respectively.

  19. Pengaruh Perubahan Penggunaan Lahan terhadap Sifat Biofisik Tanah dan Kapasitas Infiltrasi di Kota Malang

    Directory of Open Access Journals (Sweden)

    Sugeng Utaya

    2008-12-01

    Full Text Available Land use management causes the changes of the function of the land in the city. The change of the function of uncultivated land to be cultivated land has a potential to change soil biophysical characteristic, and at the same time, it decreases the absorption of soil water. This research aims: (1 to study the influence of the landuse change towards soil biophysical characteristics, (2 to study the correlation between soil biophysical characteristics and infiltration capacity, and (3 to study the influence of the landuse change towards the infiltration capacity. The landuse change is studied by comparing the ongoing mapping documents. Soil biophysical characteristics consist of root biomass, number of worms, soil organic matter (SOM, and porosity. The root biomass is obtained by root density, the number of worms is identified with monolith and hand sorting method, the SOM is identified with fraction analysis, and the porosity is identified with cylinder and pignometer method. The water absorption is measured with the plot experiment. The influence of the landuse towards soil biophysical traits is analyzed T-test and the influence of landuse change towards infiltration capacity is analyzed correlatively. This research gains the results that: (1 the landuse change causes the change of soil biophysical traits, too, and the soil biophysical traits change causes, furthermore, the declining of the land capability in absorbing water, and (2 the amount of the infiltration capacity is caused by soil biophysical traits, mostly by root biomass, number of worms, and the SOM, and (3 the landuse change causes the declining of infiltration capacity.

  20. PENGARUH MEDIUM PERENDAM TERHADAP SIFAT MEKANIK, MORFOLOGI, DAN KINERJA MEMBRAN NATA DE COCO

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    Senny Widyaningsih

    2008-05-01

    Full Text Available Nata de coco is bacterial cellulose which is produced by Acetobacter xylinum in fermentation process of coconut water. Based on its properties, nata de coco can be used as a membrane. Soaking medium in purification of nata de coco gel can influence structure, morphology, and performance of nata de coco membrane. First medium was NaOCl 0.05% and NaOH 5%, Second medium was ultrasonic. Third medium was NaOH 1% and CH3COOH 1%. Mechanical property were analysized based on its tensile strength. Morphology of membrane was analysized using SEM. Performance of membrane was determined based on its permeability. The result showed that nata de coco membrane which had the best value on mechanical properties, morphology, and performance was membrane in third medium.

  1. Sifat Fisik Pakan Kaya Serat dan Pengaruhnya terhadap Konsumsi dan Kecernaan Nutrien Ransum pada Kambing

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    N.A. Sigit

    2006-12-01

    Full Text Available Fibrous feeds vary in their physical properties. The experiment aimed to clarify the effect of physical properties of fibrous component in rations on feed intake and nutrient digestibility in goats. Rations were composed of 50% fibrous feed and 50% concentrate. The fibrous feed as treatments were as follows: napier grass (RG, rice straw (JP, cocoa pod (KC, mixed rice straw and coffee husk (JK, mixed napier grass, rice straw, coffee husk, and cocoa pod (CP. Rations were offered to four groups of 20 Etawah-grade goats weighing of 13.50±2.14 kg in a randomized block design. Physical properties of the fibrous components of ration and faeces, nutrients intake and digestibility and daily life weight gain were evaluated. Analysis of variance and correlation were applied to analyze data. Dry matter intake varied from 298-440 g/day. Goats offered KC ration had the highest intake. Low feed intake was associated with the low density of the fibrous component. Dietary fat digestibility decreased when the fibrous feed component had low capacity of oil adsorption. Young goats had life weight gain of 50-136 g/day, TDN requirement for maintenance and 50 g daily gain of 63.4 g and 131 g TDN, respectively. The results indicated that physical properties of fibrous component in the rations influenced dry matter intake and nutrients digestibility in growing goats.

  2. Pengaruh bahan pengisi serat kaca terhadap sifat fisik dan kristalinitas polipaduan PC/ABS

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    Dwi Wahini Nurhajati

    2017-06-01

    Full Text Available This research aimed to determine the effects of the addition of glass fibers on the physical and crystallinity properties of PC/ABS polyblends. The ratio of PC/ABS used in this research was 75/25, while the addition of glass fibers ranged from 0; 5; 10; to 15 phr (based on the weight of PC/ABS. Polyblends of PC/ABS/glass fibers were prepared in a twin screw extruder. The test results showed that density and tensile strength of PC/ABS polyblends increased with an increase in the glass fiber content. The presence of glass fibers decreased MFI and impact strength of these PC/ABS polyblends. The functional groups were determined by the fourier transform infrared (FTIR spectrophotometer while crystallinity was examined using X-ray diffractometer (XRD.

  3. Analisis Pengaruh Ukuran Pori Terhadap Sifat Listrik Karbon Aktif Dari Limbah Tandan Sawit Pada Prototipe Baterai

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    Handoyo Margi Waluyo

    2017-07-01

    Full Text Available The prototype batteries was succesfully made by using activated carbon. This research aimed to examine the effect of pore size on the electrical properties of activated carbon which is used as a battery-making material. Activated carbon is synthesized using H3PO4 activator with concentration variations (mass/volume of 5%, 10%, 15%, 20%, and 25%. The carbonization was carried out at 400 °C for 1 hour, while activation at 700 °C for 1 hour. The result showed, the pore size effect on the electrical properties of the activated carbon in the battery prototype, especially for the capacitance and internal resistance of the material which has a correlation of 90% and 90.2%, respectively. The sample with 25% H3PO4 has the best pore size of 5.43μm. As the pore size of the activated carbon increases, it has caused increased capacitance and decreased internal resistance of the material. With the pore size of 5.43μm, the capacitance is 5.88mF/g and the internal resistance of the material is 662.02Ω.

  4. Pemetaan Kinerja Relatif Kepemimpian Kepala Daerah terhadap Sifat Kepemimpinan Rasulullah SAW

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    Rakhmat Ceha

    2012-12-01

    Full Text Available This article proposes a model of performance measurement (mapping is based on the four leadership qualities of Prophet Muhammad SAW, they are shiddig, talbligh, amanah and fathanah. The case study used is the implementation of the leadership of the three head region Municipality (kabupaten of West Java province. Assessment process begins with identifying the variables or criteria along with unit size of each trait Prophet. Furthermore, the survey was conducted in the target study, the city of A, B, and C. For mapping, use the concept of calculation developed by a team of Technology Atlas Project-Unitet Nation and eventually can be calculated Leadership Index (IK for each of the leadership in their respective regions. IK illustrates the relative levels of leadership according to the views of the community, whether it is in compliance with the nature of leadership that ha according to the views of the community s been exemplified by the Rasulullah.

  5. Hubungan Sifat Kimia Tanah Terhadap Produksi Salak Sidimpuan (Salacca sumatrana) di Tapanuli Selatan

    OpenAIRE

    Siregar, Mastiagom; Rahmawaty; Rauf, Abdul

    2016-01-01

    Chemical soil correlation for Salacca sumatrana at Tapanuli Selatan district is superior comudity National. This study aimed to correlation of attitude of ground to ward the production of Salacca sumatrana. There were six subdistrict at thirty samples by purposive sampling method.The result of showed that soil chamical of the ground which influence toward the production of Salacca sumatrana in Kdd. The manure element of grund in the result location is lower existed to improve the production o...

  6. Pengaruh Penambahan Sodium Lauril Sulfat (Sls) Sebagai Surfaktan Terhadap Sifat Fisik Dan Uji Disolusi Tablet Ketoprofen

    OpenAIRE

    Pratama, Adithya Wahyu; Siswanto, Agus; Suparman, Suparman

    2012-01-01

    Ketoprofen (acid 2-(3-benzoilfenil) propanoat) was derivated of propionat acid which has analgesic, antipyretic, and anti-inflammatory with poor solubillity in water. This research allowed to increase the dissolution rate of ketoprofen tablets and effect on the physical characteristic by adding sodium lauril sulfat as surfactant. Sodium lauryl sulfat is a surfactant that can be used to improve wetting and dissolution rate. This study was done with make four formula of ketoprofen tablets by d...

  7. PENGARUH FORTIFIKASI NANOPARTIKEL KALSIUM LAKTAT KERABANG TELUR TERHADAP SIFAT KIMIA DAN FISIK BAKSO AYAM

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    Agus Hadi Prayitno

    2016-03-01

    Full Text Available The experiment was conducted to analysis the effect of nanoparticle eggshell calcium lactate fortification on chemical and physical properties of chicken meatballs. The materials were chicken meat, filler, spices, salt, eggshell calcium and nanoparticle calcium lactate. Fortification level of eggshell calcium and nanoparticle calcium lactate on making meatballs was 0.3% of the total meatball dough. Each treatment consisted of five replications. The data of chemical and physical properties of meatballs were analyzed statistically using variance analysis. The differences between means were tested by Duncan's new Multiple Ranges Test. The meatball fortified with eggshell calcium showed lower moisture content 67.92%, and showed higher fat content 6.92% and ash 2.56% than those of nanoparticle eggshell calcium lactate. The meatballs fortified with eggshell calcium had higher pH value 7.34 and water-holding capacity 58.53% and more firmness than those of fortified with eggshell calcium lactate. (Keywords: Chemical and physical properties, Chicken meatballs, Eggshell, Fortification, Nanoparticle calcium lactate

  8. PENGARUH FOTOOKSIDASI UV-C TERHADAP SIFAT FISIKOKIMIA DAN BAKING EXPANSION PATI SAGU (Metroxylon sago

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    Eduard Fransisco Tethool

    2017-09-01

    Full Text Available Native Sago starch is difficult to used in industry because of the limitations of its phisycochemical properties. The aim of this research was to studied effect of UV-C photo-oxidation on  physicochemical properties and baking expansion of sago starch. Five slurries ratio (starch : water ratio: 1:2; 1:4; 1:6; 1:8; and 1:10 were oxidized with UV-C irradiation for 20 minutes, and then compared with native sago starch. The results showed that UV-C photo-oxidation increasing amylose content and paste viscosity, but decreasing swelling power and solubility, and carbonyl and carboxyl content. Used of UV-C as a photooxidator effective to increasing baking expansion characteristic, and the best slurry ratio was 1:6, which has 6.97 ml/g specific volume or 33.7% increased from native sago starch (5.22 ml/g

  9. Penelitian pengaruh asam sulfat terhadap sifat fisika kekerasan atasan sepatu kerja PVC

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    Kusumo Retno Winahyu

    1996-12-01

    Full Text Available The Research of hardness aspect of PVC boot upper treated by sulfuric acid to detect influence of sulfuric acid to hardness upper on PVC boot upper. The method of the research has been done by immersing samples in sulfuric acid solution 30 % (v/v for 24 hours. After immersing samples examined connected with hardness physical property. The result of the research shown that hardness physical property become decreasing until 16,08 % has error standard 5,48. It is still agree with SNI 12 – 1848-1990. Sepatu bot dari PVC.

  10. Pengaruh Fermentasi Bakteri Asam Laktat Terhadap Sifat Fisikokimia Tepung Gadung Modifikasi (Dioscorea hispida)

    OpenAIRE

    R. Haryo Bimo Setiarto; Nunuk Widhyastuti

    2016-01-01

    Yam (Dioscorea hispida) is one of the tubers belonging to the family dioscoreaceae. Yam tubers not only have high content of carbohydrate, but also contain some toxic compounds such as: cyanogenic glycosides, alkaloids dioscorin, dehydrodioscorin, saponin and sapogenin. Fermentation of yam tubers can affected for physicochemical and amylography characteristics of modified yam flour and reduced toxic compounds. This study was aimed to determine effect of lactic acid bacteria (LAB) fermentation...

  11. Pengaruh Penggunaan Nr dan Nbr dengan Bahan Pengisi Silika terhadap Sifat Fisika Kompon Rol Karet Cpo

    OpenAIRE

    Prasetya, Hari Adi

    2010-01-01

    The research aimed to obtain the influence of natural rubber NR, synthetic rubber NBR and alumunium silikat (AISiO₃) as a filler, its physical properties and also to find out rubber compound the best for rubber mixture with variation of NR : NBR 50, 70 : 30, 90 : 10 hr and variation of aluminium silikat (ASiO₂) 45 phr, 50 phr, 55 phr. The result showed that the addition of rubber NR : NBR ratio and alumunium silikat (ASiO₂) had significant effect on the hardness, tensile strength, abration re...

  12. Penelitian pengaruh campuran karet alam dan karet nitril kompon sol sepatu terhadap sifat swelling

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    Sofyan Karani

    1997-06-01

    Full Text Available The objective of this research is to find the quality of oil resistant soles indicated by swelling test in Benzol. The compound is made of natural rubber (RSS and synthetic rubber (NBR the part of which vary from 45/55; 50/50; 55/45. The result of the test indicates that the sole compound of RSS 45 part and NBR 55 part gives the best oil resistant.

  13. Pengaruh suhu vulkanisasi terhadap sifat mekanis vulkanisat karet alam dan karet akrilonitril-butadiena

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    Norma Arisanti Kinasih

    2015-12-01

    Full Text Available Natural and acrylonitrile-butadiene rubbers possess different vulcanization characteristics. Selection of the vulcanization system and temperature affects the mechanical properties of vulcanized natural rubber (NR and acrylonitrile-butadiene rubber (NBR. In the present work, the effect of vulcanization temperature (150, 160, 170 and 180oC on the mechanical properties of NR and NBR vulcanizates was studied. The effect of different vulcanization system (semi efficient, efficient and sulfur donor was studied in NR blends, while the effect of different acrylonitrile content (26, 28 and 33 wt % was studied in NBR blends. The NBR curing characteristics and mechanical properties data showed that vulcanization at low temperature (150oC was suitable for low acrylonitrile-NBR, whereas that at high temperature (170oC was suitable for high acrylonitrile-NBR. In addition, the semi efficient system at low temperature vulcanization (150oC was suitable for natural rubber.

  14. Pengaruh suhu vulkanisasi terhadap sifat mekanis vulkanisat karet alam dan karet akrilonitril-butadiena

    OpenAIRE

    Norma Arisanti Kinasih; Muhammad Irfan Fathurrohman; Dadang Suparto

    2015-01-01

    Natural and acrylonitrile-butadiene rubbers possess different vulcanization characteristics. Selection of the vulcanization system and temperature affects the mechanical properties of vulcanized natural rubber (NR) and acrylonitrile-butadiene rubber (NBR). In the present work, the effect of vulcanization temperature (150, 160, 170 and 180oC) on the mechanical properties of NR and NBR vulcanizates was studied. The effect of different vulcanization system (semi efficient, efficient and sulfur d...

  15. Perbedaan jenis bahan penyamak terhadap sifat fisik kulit katak bull frog

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    Mochtar Lutfie

    1997-06-01

    Full Text Available The Obyective of this research is to study the effects of various tanning agents on the qualities of leather made from Bull Frog skin. Fifteen pieces of wet salted Bull Frog from Malang were tanned with several tanning agents, wich are mineral (10% Chromosal B, vegetable (10% Mimosa extract and synthetic tensile strengths and elongations. Its turned out that vegetable tanning agent gave the higest tensile strength (279,62 kg/cm2, while mineral tanning agent gave the lowest one (183.04 kg/cm2. It showed that the type of tanning agent used significantly effects the tensile strength of the leather produced (p ≤ 0.005. On the other hand, mineral tanning agent gave the higest elongation (105.20%. While vegetable tanning agent gave the lowest one (91.20%. This result implied that the type of tanning agent used has a significant effect on the elongation (p ≤ 0.01.

  16. Pengaruh Kombinasi Fly Ash dan Bottom Ash sebagai Bahan Substitusi pada Campuran Beton terhadap Sifat Mekanis

    OpenAIRE

    Yahya, Tengku Tantoni; Kurniawandy, Alex; Djauhari, Zulfikar

    2017-01-01

    Fly ash and bottom ash were waste that generated from the power plant burning coal process. Fly ash and bottom ash has the potential to be developed as a basic ingredient in concrete composites. This research aimed to obtain the properties of fresh concrete and hard concrete of the combined effect of fly ash and bottom ash as a substitute ingredient in composite concrete. This research has examined the influence of a combination of waste fly ash and bottom ash to the compressive strength of a...

  17. Pertimbangan Sifat Mekanik Pelepah Sawit Terhadap Proses Pengomposan Sebagai Acuan Desain Mesin Pencacah

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    Ramayanty Bulan

    2016-10-01

    Full Text Available Physical and mechanical properties of palm frond are very important factor for the development of palm oil waste utilization technology. The objective of this research was to determine mechanical properties of palm frond Frond for Chopper Machine Designing. The research of composting conduct with two composting factor combination, namely: composting starter composition (i.e. Bokashi, vermi-compost and natural composting and piece of frond dimension (2 cm, 4 cm, and 6 cm. Sample was obtained from 5 years and 20 years palm oil trees. The average length of palm frond was 675.89 cm, average leaflet length at the palm frond base was 103.89 cm and average leaflet length at palm frond tip was 23.83 cm. Maximum compression strength at the 20 years-palm frond base was 8134.62 N and at the 5 years-palm midrib base was 4893.52 N. Maximum force requirement for cutting palm leaf was 67.67 N. The composting process indicates that Bokashi starter composition gives higher percentage of mass reduction on all variant of piece of frond dimension. Smaller piece of frond (2 cm enable the composting process quicker and had a better result. Statistical analysis reveals that combination of composting factors have significant effect on C/N ratio but insignificant on NPK content.

  18. Pengaruh penggunaan bahan pewarna alam dari ekstrak kayu terhadap sifat fisis kulit ikan kakap merah

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    Emiliana Kasmudjiastuti

    2002-06-01

    Full Text Available Abstract The objective of this research is to identify the effect of some natural dye of wood extract to the physical properties (tensile strength, elongation and rub fastness resistance of kakap (Lutjanidae fish skin leather. Fifteen pieces of dry preserved kakap fish skin were used in this research, and tanned using syntan and alum. The dyeing process was done using natural dyes of wood extract of Caesalpinia sappan L, Artocarpus heterophyllus, Swietenia mahagoni JACQ, Maclura cochinensis, and Ceriops tagal. The result of research indicated that the kind of applied natural dyes were not affect the physical properties of Kakap fish skins. The fish skins dyed using the such natural dyes was able be utilised as material in leather goods manufacturing. One of the five types of natural dye used in this research, Swietenia mahagoni JACQ wood extract produced the best dyed leather having good tensile strength, elongation/flexibility and the colour fastness. The tensile strength was 213,15 kg/cm2, flexibility 56% and colour fastness with wet white cloth 3/4 (grey scale value and with dry white cloth 4/5 (grey scale value, respectively

  19. Pengaruh sulfur terhadap sifat fisika campuran pale crepe dan SBR untuk karet tahan panas

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    Arum Yuniari

    2013-12-01

    Full Text Available Sulfur plays an important role in the rubber vulcanization process especially in the formation of crosslinks. Heat resistant rubber made from mixing pale crepe and SBR requires the right amount of sulfur as crosslinking agent. The purpose of the study was to determine the effect of the addition of sulfur on the changes in physical properties before and after aging. Heat resistant rubber was made with variation of pale crepe/SBR: 80/20; 70/30; 60/40; 50/50 phr and sulfur variation of 1; 1.5 phr. The results showed that sulfur was influential in the crosslinks formation. The addition of 1 phr sulfur gave higher physical properties of the vulcanized with 1.5 phr sulfur. The changes of physical properties after aging process of the vulcanized with sulfur 1 phr was lower than the vulcanized with sulfur 1.5 phr. Vulcanized pale crepe/SBR (70/30 with 1 phr sulfur could be applied as heat-resistant rubber products.

  20. Pengaruh suhu vulkanisasi terhadap sifat tegangan putus, perpanjangan putus dan ketahanan sobek kompon sol karet

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    Prayitno Prayitno

    1995-12-01

    Full Text Available One of the processes steps for producing rubber sole is vulcanization process. This process is carried out by using pressed moulding methods in which rubber compound was heated and pressed in the mould of rubber sole at certain time and temperature. The aim of this research is to know the influence of the temperature used for vulcanization for the tensile strength, elongation and tearing strength properties of the rubber sole compound. Temperature vulcanization used for the research was varied at 1400C, 1500C, 1600C and 1700C. The results shows that vulcanization at 1400C, give the highest properties in tensile strength, elongation and tearing strength, those are : 113,70 kg/cm2; 326,60 % and 107,00 kg/cm2respectively. Increasing temperature vulcanization cause decreasing those physical properties.

  1. Penelitian pengaruh campuran carbon black dan china clay terhadap sifat tegangan putus dan kekerasan karet vulkanisat

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    Supraptiningsih Supraptiningsih

    1999-07-01

    Full Text Available It has been done a research of the influence of mixed carbon black and hardness properties on the vulcanization of rubber. It has been made with additive of carbon black and china clay mixed, in total variation. The result is seen that total variation of carbon black and china clay not influence to tensile strength, but their interacton can do it. The hardness of vulcanization of rubber will be influence by total variation of carbon black china clay anad their interaction.

  2. PENGARUH JENIS KEDELAI DAN JUMLAH AIR TERHADAP SIFAT FISIK, ORGANOLEPTIK DAN KIMIA SUSU KEDELAI

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    Dwi Eva Nirmagustina

    2013-09-01

    Full Text Available Soybean milk,  a highly nutritious drink especially in protein content, is made ​​from soybean.  Some of the benefits of soybean milk are relatively low price , suitable to be consumed by people with lactose intolerant and for people with diabetes mellitus, favored by children, and easy to manufacture.  Soybean milk quality is determined by the type of soybeans and the amount of water used to dilute.  The research objective was to determine the influence of the type of soybeans (Edamame var. Ryoko, Import, and Local var. Willis and the amount of water (8, 10, 12 parts on physical, sensory, and chemical characteristic of soybean milk.  The study was conducted in a complete randomized block design with three replicatations, and replication used as a group.  The data were analyzed using analysis of variance to determine various error estimators and further tested using Duncan's test find whether there is a difference between treatments.  The result showed that viscosity of soybean milk did not influence by the type of soybean but it is influenced by the amount of water. The interaction between the type of soybeans and the amount of water did not affect the organoleptic properties (color, aroma, and taste of soybean milk. Keywords: milk, soybean, sensory properties, water dilution.

  3. Pengaruh penggunaan karbon hitam bervariasi terhadap sifat fisika sol karet sepatu kanvas untuk umum

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    Hadi Musthofa

    1997-06-01

    Full Text Available he objective of this research is to know the influence carbon black to the physical properties rubber sol of canvas shoes for general. Vulcanized rubber makes from rubber smoked sheet as row material naphthenic oil, ZnO, stearic acid, carbon black, AoSP, MBT, MBTS, TMT and sulphur. Raw material rubber and ingredient were compounded in two roll mill and formed to slab by hydraulic press at temperatur 1500 C and pressure 150 kg/cm2. The result of this research indicated that unsignificant different of treatment.

  4. PENGARUH JENIS KEMASAN DAN LAMA PENYIMPANAN TERHADAP SIFAT KIMIA, MIKROBIOLOGI DAN ORGANOLEPTIK PERMEN KARAMEL SUSU KAMBING

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    Susilawati Suslawati

    2012-12-01

    Full Text Available Caramel candy is a kind of toffee classified into  soft candies, and  processed using milk and sugar as the main ingredients. One way to prevent food spoilage is to use suitable packaging as well as storage system. This study was aimed to determine the effects of  packaging materials and storage time until 28 days at room temperature  and their interaction effects on the the chemical, microbiological, and organoleptic properties , and its accordance with SNI 3457.2 caramel candy standard. The study was conducted in two groups of factors and arranged in Complete Randomized Design with three replications. The first factor was the type of packaging (P consisted of polyethylene plastic (P1, aluminum foil (P2, and oil paper packaging (P3. The second factor was the duration of storage (L consisted of 0 days (L1, 7 days (L2, 14 days (L3, 21 days (L4, and 28 days (L5.  The homogenity and additivity  of  the data were tested using Barlett  and Tuckey tests, continued using ANOVA ,  and then further tested using  comparison and orthogonal polynomials at of 1% or 5% level of significance.  The results showed the samples wrapped in aluminum foil  and stored for 28 days at room temperature, was found to be the best type of packaging. The criteria of the best goat’s milk caramel candies were:  water content of 5,81% w/w, ash content of 0,95% w/w, reducing sugar content 2,26% w/w, total molds and yeasts 0,49x102 colonies/gram, a total microbial of 2,83 colonies/gram, and the color, texture, taste, and aroma were brown, soft, sweet, and neutral. these criteria met the SNI 3547.2 (2008 quality standard for  caramel candies.

  5. Pengaruh pemlastis nabati terhadap sifat elastomer termoplastik berbasis campuran karet alam/poli propilena

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    Dwi Wahini Nurhajati

    2015-12-01

    Full Text Available Vegetable plasticizer is a plasticizer that is derived from renewable raw materials, that are used as an alternative to petroleum-based plasticizer. The purpose of this research was to compare the effect of the vegetable and plasticizer with petroleum plasticizers on the mechanical properties of (Thermoplastic Elastomer TPE. Vegetable plasticizer used in this study is a modified castor oil. Natural rubber/polypropylene (KA/PP based TPE was made in an internal mixer at a temperature of 180ºC with a variousvarious ratio KA/PP ratio and type of plasticizer. In general, modified castor oil as a plasticizer has a more positive effect on the mechanical properties of TPE in various ratios of KA/PP, is mainly related to improvement of properties of tensile strength, elongation at break and flexing resistance 100 kcs. The best formula of TPE is a TPE that is composed of KA/PP 60/40 using modified castor oil. XRD results showed that TPE is dominated by amorphous phase.

  6. Studi Penggunaan Plat Elektroda Netral Stainless Steel 316 dan Aluminium Terhadap Performa Generator HHO Dry Cell

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    Tasrif Arifin

    2015-12-01

    Full Text Available Abstrak. Generator HHO merupakan alat yang menggunakan prinsip elektrolisis air untuk memisahkan unsur-unsur kandungan air murni (H2O menjadi Gas HHO, dalam upaya peningkatan performanya tentu dibutuhkan bahan konduktor yang memiliki sifat kelistrikan baik. Penambahan plat elektroda netral ialah bertujuan untuk meningkatkan performa elektroliser dan mengatasi berbagai macam permasalahan yang terjadi pada saat proses elektrolisis air bekerja. Penelitian ini menunjukkan bahwa plat elektroda netral aluminium mampu meningkatkan nilai performanya sedangkan untuk plat SS 316 mampu meminamalisir persentase losses energy. Larutan AMDK murni terbukti mampu meningkatkan produktivitas gas dibandingkan dengan larutan aquades murni, tetapi kelemahan dari larutan AMDK yaitu mudahnya terbentuk gel-gel, sehingga menghambat pergerakan elektron dan laju aliran produksi. Karateristik sifat bahan sangat berpengaruh terhadap pencapaian kinerja Generator HHO karena tidak semua jenis plat elektroda netral mampu meningkatkan performanya. Sifat-sifat kelistrikkan bahan yang sangat berpengaruh ialah sifat keelektronegatifan atau potesial elektroda dan koefisien nilai muai dari suatu bahan konduktor.   Usage Study Neutral Electrode Plate Stainless Steel 316 and Aluminium of Performance Generator HHO Dry Cell Type Abstract. Generator is a tool that use principle of water electrolysis to separated the element of pure water conscience (H2O be HHO gas, in effort to increase the perform of HHO Generator is needed a conductor ingredients which has a good electricity character the direction of addition neutral electrode plate is to increase the electrolyzer perform and to overcome every problem that happen when the water electrolisys process is going. This research shows that neutral electrode aluminium plate can increase the performance value and the SS 316 plate can minimize the percentage of losses energy. The pure AMDK solution proofs that can increase the gas productivity

  7. PROFIL GELATINISASI BEBERAPA FORMULASI TEPUNG-TEPUNGAN UNTUK PENDUGAAN SIFAT PEMASAKAN (GELATINISATION PROFILE OF SEVERAL FLOUR FORMULATIONS FOR ESTIMATING COOKING BEHAVIOUR

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    Nelis Imanningsih

    2012-06-01

    garam dan protein putih telur merupakan formulasi dasar yang banyak dijumpai pada makanan tradisional Indonesia. Komposisi amilopektin-amilosa yang berbeda serta adanya interaksi bahan di dalam formula sangat menentukan sifat pemasakan untuk mendapatkan karakteristik tekstur yang diinginkan. Untuk mempelajari interaksi beberapa jenis tepung dengan air, protein putih telur dan garam serta pengaruhnya terhadap sifat pemasakan makanan semi-solid. Ada empat formulasi untuk setiap jenis tepung (beras, beras ketan, terigu dan tapioka, yakni: (1 air : tepung = 25 : 3 g; (2 air : tepung : garam =  25 : 3 : 0,28 g; (3 air : tepung : protein putih telur = 25 : 3 : 0,3 g; dan (4 air, tepung, garam, protein putih telur = 25 : 3 : 0,28 : 0,3 g. Tepung-tepungan dianalisis kandungan proksimat, distribusi ukuran partikel dan komposisi amilosa-amilopektinnya. Sifat pemasakan diuji dengan menggunakan Rapid Visco Analizer (RVA untuk menentukan viskositas, suhu dan waktu puncak terjadinya gelatinisasi. Tepung beras, beras ketan, terigu dan tapioka memiliki sifat gelatinisasi berbeda yang berhubungan dengan struktur pati dan komposisi amilosa-amilopektin. Tepung terigu memiliki viskositas puncak yang paling rendah, sementara tepung tapioka tertinggi. Adanya garam akan menunda waktu terjadinya gelatinisasi. Protein putih telur meningkatkan viskositas puncak, dan adanya garam dan protein putih telur secara bersamaan meningkatkan viskositas puncak dan menyebabkan viskositas puncak ini terjadi dengan lebih cepat. Dalam pengolahan pangan, tepung tapioka dapat digunakan untuk memberi kekentalan pada waktu pemasakan yang singkat, tetapi kurang dapat memberikan kekentalan yang cukup pada produk yang dingin. Tepung beras memerlukan waktu pemasakan yang cukup lama untuk memberikan kekentalan yang baik pada produk, tetapi kekentalan ini dapat bertahan baik pada suhu yang dingin. [Penel Gizi Makan 2012, 35(1: 13-22] Kata kunci: tepung, garam, protein, gelatinisasi, viskositas

  8. Sifat Mekanik Membran Berbasis Paduan Kitosan Suksinat-Kitosan Terinsersi Litium

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    L.O.A.N Ramadhan

    2014-10-01

    Full Text Available Sifat mekanik merupakan salah satu karakter yang penting dalam pengembangan material polimer fungsional seperti membran elektrolit yang berpotensi untuk penghantar litium. Dalam penelitian yang telah dilakukan, membran elektrolit disintesis dengan bahan dasar kitosan suksinat dan kitosan, serta litium. Membran dipreparasi melalui metode inversi fasa dengan variasi komposisi fraksi massa kitosan suksinat dan kitosan. Selanjutnya dilakukan uji sifat mekanik. Hasil penelitian menunjukkan bahwa peningkatan fraksi massa kitosan suksinat sampai dengan 60% (b/b cenderung meningkatkan kekuatan tarik dan perpanjangan, serta menurunkan Modulus Young. Pada fraksi massa kitosan suksinat 70% (b/b sampai dengan 80% (b/b, kekuatan tarik dan perpanjangan cenderung menurun, serta Modulus Young meningkat. Nilai maksimum kekuatan tarik, perpanjangan, dan Modulus Young masing-masing adalah 0,18 MPa, 112 %, dan 14,31 MPa. Berdasarkan hasil analisis sifat mekaniknya, membran paduan kitosan suksinat-kitosan terinsersi litium memiliki stabilitas mekanik yang cukup baik. 

  9. Evaluasi Sifat Morpologi dan Teknologi Pengolahan pada Gabah dan Beras

    OpenAIRE

    Santosa, Susilo

    2017-01-01

    Penelitian evaluasi dan beras terhadap mutu dan jumlah hasil ditekankan pada lr36 , lr38 dan Cisadane. Penelitian dilakukan di laboratorium Balai Penelitian Tanaman Pangan Karawang. Hasil studi menunjukkan diantara ketiga varitas, Cisadane mempunyai ukuran dimensi butiran yang lebih besar daripada Ir36 dan Ir38. Di antara ketiga varitas, persen kulit sekam yang tertinggi didapat 23,57 % pada lr38 diikuti 22,32% pada Ir36 dan 19,5% pada Cisadane. Persen beras pecah kulit tertinggi diperoleh pa...

  10. Evaluasi Sifat Morpologi Dan Teknologi Pengolahan Pada Gabah Dan Beras

    OpenAIRE

    Santosa, Susilo

    1982-01-01

    Penelitian evaluasi dan beras terhadap mutu dan jumlah hasil ditekankan pada lr36 , lr38 dan Cisadane. Penelitian dilakukan di laboratorium Balai Penelitian Tanaman Pangan Karawang. Hasil studi menunjukkan diantara ketiga varitas, Cisadane mempunyai ukuran dimensi butiran yang lebih besar daripada Ir36 dan Ir38. Di antara ketiga varitas, persen kulit sekam yang tertinggi didapat 23,57 % pada lr38 diikuti 22,32% pada Ir36 dan 19,5% pada Cisadane. Persen beras pecah kulit tertinggi diperoleh pa...

  11. SIFAT ORGANOLEPTIK SUBTITUSI TEPUNG KIMPUL DALAM PEMBUATAN CAKE

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    Taufik Rafika

    2014-01-01

    Full Text Available Organoleptic properties of kimpul flour substitution in the cake making. Kimpul is a one of tuber food source, which contains carbohidrate, protein, fat, some mineral and vitamins. The aims of this research is to find out the sensory properties (hedonic quality and hedonic of the kimpul cake flour substitution. This experimental research uses a completely-randomized design using an analysis of variance. The results analysis of the hedonic quality of color, texture and flavor obtain the highest mean rates at the amount of 40% substitution of kimpul flour, and the results  were not significantly different between treatments. The hedonic test of color, flavor, and texture obtain the highest mean rates at the amount of 80% substitution of kimpul flour.   Kimpul merupakan sumber pangan umbi-umbian yang mengandung karbo­hidrat, protein, lemak, beberapa mineral dan vitamin. Tujuan dari penelitian ini adalah  mengetahui sifat sensori (mutu hedonik dan hedonik cake subtitusi tepung kimpul. Penelitian eksperimen ini menggunakan metode rancangan acak lengkap  mengguna­kan analisis sidik ragam (Analysis of Variance. Hasil analisis uji mutu hedonik warna, tekstur dan rasa memperoleh rerata tertinggi pada jumlah substitusi tepung kimpul 40% yang tidak berbeda antar perlakuan. Uji hedonik (uji tingkat kesukaan warna, rasa, dan tekstur  memperoleh rerata tertinggi pada jumlah subtitusi tepung kimpul 80%.

  12. Aktivitas Antioksidan, Sifat Fisik, Dan Tingkat Penerimaan Permen Marshmallow Dengan Penambahan Brokoli

    OpenAIRE

    Jalasena, Rizka Akbar; Anjani, Gemala

    2016-01-01

    Latar Belakang : Komsumsi sayur pada anak masih rendah. Brokoli merupakan salah satu sayuran tinggi antioksidan. Salah satu cara meningkatkan konsumsi sayur pada anak adalah melalui produk yang disukai seperti permen. Penambahan brokoli pada permen marshmallow diharapkan dapat menjadi alternatif produk tinggi antioksidan.Tujuan : Menganalisis kandungan aktivitas antioksidan, sifat fisik (kekerasan dan kekenyalan), dan tingkat penerimaan permen marshmallow dengan penambahan brokoli.Metode : Me...

  13. Sifat Strong Perron-Frobenius Pada Solusi Positif Eventual Sistem Persamaan Differensial Linier Orde Satu

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    Yulian Sari

    2014-12-01

    Full Text Available Artikel ini membicarakan tentang sifat strong Perron-Frobenius pada solusi positif eventual sistem persamaan differensial linier orde satu. Syarat perlu agar solusi positif eventual sistem persamaan differensial linier orde satu diajukan. Beberapa kriteria tentang matriks eksponensial positif eventual dan matriks positif eventual juga akan digunakan dalam teorema.

  14. Sifat Strong Perron-Frobenius Pada Solusi Positif Eventual Sistem Persamaan Differensial Linier Orde Satu

    Directory of Open Access Journals (Sweden)

    Yulian Sari

    2015-04-01

    Full Text Available Artikel ini membicarakan tentang sifat strong Perron-Frobenius pada solusi positif eventual sistem persamaan differensial linier orde satu. Syarat perlu agar solusi positif eventual sistem persamaan differensial linier orde satu diajukan. Beberapa kriteria tentang matriks eksponensial positif eventual dan matriks positif eventual juga akan digunakan dalam teorema.

  15. PENGARUH PERENDAMAN BIJI KAKAO KERING DAN BAHAN ALAT SANGRAI TERHADAP SIFAT FISIK DAN PROFIL SENYAWA VOLATIL KAKAO SANGRAI SERTA SIFAT SENSORIS COKELAT BATANG YANG DIHASILKAN

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    Yulius Gae Lada

    2015-02-01

    menggunakan alat sangrai dari alumunium, besi dan tanah liat menghasilkan profil senyawa volatil yang berbeda. Dari kromatogram SPME-GC-MS diketahui bahwa alat sangrai dari tanah liat menghasilkan kelompok senyawa dan total luas area yang lebih kecil dibandingkan dengan alat sangrai dari alumunium dan besi. Cokelat batang yang dihasilkan melalui perendaman dan disangrai menggunakan alat sangrai dari tanah liat adalah yang paling disukai oleh panelis. Kata kunci: Perendaman, bahan alat sangrai, biji kakao sangrai, profil senyawa volatil, cokelat batang

  16. Perbedaan Pandangan Ajaran Sifat Melawan Hukum Materiil Tindak Pidana Korupsi

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    Seno Wibowo

    2015-08-01

    Full Text Available ABSTRAK Penerapan ajaran sifat melawan hukum materiil dalam fungsi positif dalam Undang-Undang Nomor 20 Tahun 2001 tentang Perubahan Atas Undang-Undang Nomor 31 Tahun 1999 tentang Pemberantasan Tindak Pidana Korupsi (UU Tipikor 2001 oleh Mahkamah Agung pasca putusan Mahkamah Konstitusi telah bertentangan dengan Undang-Undang Dasar 1945 Pasal 28 ayat (1 huruf D dan asas legalitas serta asas pemisahan kekuasaan negara. Selain itu, hal tersebut juga dinilai tidak mengindahkan sudut hierarki peraturan perundang-undangan di Indonesia, sehingga tidak mencerminkan kepastian hukum. Mahkamah Agung tidak berwenang menerapkan kembali ajaran sifat melawan hukum dalam fungsi positif yang terdapat dalam UU Tipikor 2001 dikarenakan dengan hal tersebut dinyatakan tidak memiliki kekuatan hukum mengikat oleh Mahkamah Konstitusi. Putusan judicial review Mahkamah Konstitusi tidak hanya mengikat para pihak yang berperkara namun juga rakyat dan lembaga tinggi negara termasuk Mahkamah Agung. Mahkamah Agung harus melaksanakan dan mematuhi putusan judicial review tersebut mengingat kedudukan putusan Mahkamah Konstitusi sebagai negative legislation. Apabila instansi penegak hukum maupun aparaturnya menggunakan suatu instrumen hukum yang telah dinyatakan tidak mempunyai kekuatan mengikat secara hukum, maka akibat hukum yang terjadi dapat berupa kerugian finansial. Instansi penegak hukum atau aparaturnya dapat menanggung akibat hukum secara pribadi (personal liability untuk mengganti kerugian yang dituntut melalui peradilan biasa yang ditegakkan secara paksa dan demi hukum batal sejak semula (ab initio. Abstract The application of the unlawful material doctrine in a positive function in Law Number 20 in 2001 on The Amendment of Law Number 31 in 1999 on Corruption Eradication (UU Tipikor 2001 by the Supreme Court after the decision of the Constitutional Courts contrary to the Constitution of 1945 Article 28 D paragraph 1 and the principle of legality and separation of state

  17. Simulasi Sifat Fisis Model Molekuler Dinamik Gas Argon dengan Potensial Lennard-Jones

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    Wira Bahari Nurdin

    2014-01-01

    Full Text Available DOWNLOAD PDFTelah  dilakukan  pembuatan  dan  pengujian  suatu  simulasi  tentang  sifat  fisis  gasargon  dengan  menggunakan  dinamika  molekuler  menggunakan  potensial Lennard-Jonesdalam sistem terisolasi (ensemble mikrokanonik. Jumlah molekul, energi total sistem danluas  kotak  simulasi  telah  divariasikan.  Untuk  menghitung  perubahan  posisi  digunakanalgoritma Verlet. Sifat fisis yang ditentukan dalam simulasi adalah temperatur dan energitotal  sistem  untuk  menentukan  adanya  fase  transisi.  Dari  hasil  simulasi,  terdapatkesesuaian antara simulasi dengan gas argon dan tidak diperoleh adanya fase transisi.Kata kunci: Simulasi dinamika molekul, argon, potensial Lennard-Jones, ensemblemikrokanonik, algoritma Verlet

  18. PENGARUH RASIO RIMPANG RUMPUT TEKI (Cyperus rotundus L. DENGAN JAHE (Zingiber officinale TERHADAP KAPASITAS ANTIOKSIDAN DAN MUTU WEDANG TEKI INSTAN

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    Nurwikan Sutralestari

    2018-02-01

    Full Text Available Tujuan penelitian adalah memperoleh proses pengolahan wedang teki ins­tan, mengetahui kapasitas antioksidan serta mutu (rendemen, waktu rehidrasi, sifat fi­sik warna, dan uji hedonik wedang teki instan dengan rasio rimpang rumput teki dan jahe berbeda. Jenis penelitian yang dilakukan merupakan penelitian eksperimen meng­­­­gunakan Rancangan Acak Lengkap (RAL dengan dua kali pengulangan. Data ha­sil analisis diuji menggunakan ANOVA (Analysis of Variances. Hasil penelitian yang diperoleh menunjukkan wedang teki instan dengan rasio rimpang rumput teki dan jahe yang berbeda berpengaruh terhadap kapasitas antioksidan, waktu rehidrasi, si­­fat fisik warna, serta uji hedonik rasa dan warna. Kapasitas antioksidan dan ke­su­ka­an rasa terbaik  pada wedang teki instan dengan rasio rimpang rumput teki dan jahe 1 : 2½. Waktu rehidrasi tercepat, sifat fisik warna paling cerah dan kesukaan war­­­­na pada wedang teki instan dengan rasio rimpang rumput teki dan jahe 1 : 1½.

  19. Isolasi dan Karakterisasi Sifat Pati Kacang Hijau (Vigna radiata L. Beberapa Varietas Lokal Indonesia

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    Priyanto Triwitono

    2017-09-01

    Full Text Available Mung beans is a kind of legumes that possesses a potential  amylose to produce low calories RS-3. Studies on the characteristics of the starch will be useful for the treatment of obesity in the future. Isolation and characterization of the properties of mung bean starch of 4 local Indonesian varieties (Walet, Sriti, Murai, and Vima-1 have done. Isolation of starch using a modified method of Hoover. The analyzed properties of starch consist of starch content, amylose content, granular shape, color, swelling power, WHC, the blue value, amylograph and crystallinity properties. The results indicated that the mung bean varieties Walet have the highest amylose content (55.39%, that’s potential as source of  RS-3. Mung beans Walet have the 42.11% of starch content; 35.33% of yield starch; 99.63%  of starch purity; 17.11 g/g of highest swelling power; 65.26 g/g of WHC; 59.36 g/g  of OHC; 8.92% of blue value; Oval granular shape; white  color (88.09 of  Lightness; 78.7 °C of gelatinization temperature; tipe C of X-ray diffraction pattern, and 1430 Cp of the fastest retrograded starch viscosity. ABSTRAK Kacang hijau merupakan jenis kacang-kacangan sumber pati beramilosa tinggi yang potensial menghasilkan RS-3 tinggi dan rendah kalori. Kajian tentang karakteristik patinya akan membuka peluang pemanfaatannya untuk penanganan obesitas di masa datang. Telah dilakukan isolasi dan karakterisasi sifat-sifat pati kacang hijau dari 4 varietas lokal Indonesia (Walet, Sriti, Murai, dan Vima-1. Isolasi pati menggunakan metode Hoover yang dimodifikasi dan sifat-sifat pati yang dianalisis meliputi kadar pati, amilosa, bentuk granula, warna pati, swelling power, WHC, blue value, viskositas, dan sifat kristalinitas pati. Hasil isolasi dan analisis menunjukkan bahwa kacang hijau varietas Walet memiliki kadar amilosa paling tinggi (55,39%, sehingga potensial sebagai bahan dasar RS-3. Kacang hijau Walet menghasilkan kadar pati 42,11%; rendemen pati 35

  20. KEJAHATAN KERAH PUTIH (WHITE COLLAR CRIME TERHADAP ILLEGAL LOGGING DI SUMATERA UTARA

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    Muhammad R. Dayan

    2017-08-01

    Full Text Available Pemerintah membuat kebijakan terhadap tindak pidana Illegal logging disebabkan kegiatan illegal logging merupakan serangkaian tindakan penyimpangan perilaku yang berdampak kepada ekosistem secara berkelanjutan yang pada akhirnya berakibat dan membahayakan keberlangsungan hidup manusia. Sebagai suatu patokann (standar untuk menilai dan dikenakan sanksi pidana. Oleh karenya memerlukan penanggulangan baik secara preventif maupun represif. Pertanggungjawaban pelaku kejahatan kerah putih terhadap illegal logging adalah penerapan atas hukum yang meminta pertanggungjawaban pelaku tanpa membuktikan adanya unsur kesalahn atau adanya unsur kesalahan pada si pelaku tindak pidana. Hal ini disebabkan KUH Pidana mengandung unsur adanya asas mens rea (asas kesalahan dan tentang pertanggungjawbana pidana berorientasi kepada manusia atau orang bukan korporasi istilah “daad-dader straftrecht” artinya hukum pidana yang memperlihatkan segi-segi objektif dari “perbuatan” (daad dan juga segi-segi subjektif dari orang/pembuat (dader. Sifat hukum demikian akan menggambarkan keseimbangan antara kepentingan masyarakat dan kepentingan individu. Upaya penegakan hukum untuk menanggulangi kejahatan illegal logging adalah menggunakan perangkat undang-undang money laundering, hal ini disebabkan perangkat hukum memungkinkan actor intelektual yang mendanai kegiatan tersebut dapat terjerat oleh hukum. Oleh karenanya dalam tindak pidana pencucian uang adanya kerja sama antara Lembaga Penyedia Jasa Keuangan atas indikasi pencucian uang dan Pusat Pelapor dan Analisis Transaksi Keuangan (PPATK serta Penyidik (kepolisian dan Penuntut Umum.

  1. PENGARUH PENDIDIKAN KEWIRAUSAHAAN DI LINGKUNGAN KELUARGA, PEMBELAJARAN KEWIRAUSAHAAN DI SEKOLAH, SERTA ACHIEVEMENT MOTIVE TERHADAP MINAT KEWIRAUSAHAAN SISWA SMA

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    Eny Eko Sulistyowati

    2016-11-01

    menunjukkan bahwa (1 pendidikan kewirausahaan di lingkungan keluarga berpengaruh terhadap minat kewirausahaan siswa, (2 pembelajaran kewirausahaan disekolah dengan menggunakan media pembelajaran memiliki pengaruh terhadap minat kewirausahaan siswa, (3 achievement motive berpengaruh signifikan terhadap minat kewirausahaan siswa. Berdasarkan pada temuan penelitian tersebut, dapat disarankan (1 kepada orangtua siswa untuk terus mengajarkan anak-anak sedini mungkin untuk memiliki sifat-sifat seorang wirausaha serta mendukung anak ketika memilih menjadi wirausaha daripada menjadi pegawai, (2 kepada pihak sekolah, diharapkan dalam melakukan pembelajaran kewirausahaan, dapat mengikuti perubahan pada dunia usaha, menggunakan media belajar yang bervariasi dan meningkatkan motivasi siswa untuk mencoba menjadi wirausaha dengan menggunakan media pembelajaran yang tepat di sekolah.

  2. SIFAT HIPOKOLESTEREMIK MINYAK KELAPA SAWIT, MINYAK KEDELAI DAN TEMPE

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    Mien KMS Mahmud

    2012-11-01

    Full Text Available Kadar kolesterol dan trigliserida darah merupakan salah satu indikator yang dapat digunakan untuk mendiagnosa kemungkinan adanya gangguan jantung atherosklerosis. Kadar lipida darah mempunyai korelasi yang tinggi dengan jenis lemak atau minyak yang dikonsumsi setiap hari, karena komposisi asam lemak pada setiap jenis minyak berbeda. Tempe telah lama digemari masyarakat Indonesia dan telah diketahui bermanfaat bagi kesehatan. Penelitian yang dilaporkan melalui makalah ini bertujuan mempelajari peluang kejadian penyakit atherosklerosis pada pada kelinci dengan pola konsumsi minyak makan asal kelapa sawit, minyak kedelai, minyak asal lemak babi atau minyak babi dicampur tempe. Kelinci percobaan dewasa yang sehat dikelompokkan berdasarkan kadar hemoglobin darah antara 8.2-13.6 g/dl menjadi lima kelompok percobaan. Satu kelompok sebagai kontrol diberi ronsum standar terdiri dari pelet, kangkung dan ubi merah secara adlibitum. Empat kelompok lainnya, disamping ransum standar juga diberi 2 ml minyak babi atau minyak kedelai atau minyak kelapa sawit atau minyak babi yang ditambahkan 5 gram tempe bubuk, sehari. Pengamatan dilakukan terhadap kadar kolesterol total,  LDL, HDL dan trigliserido darah. Dilakukan pula pemeriksaan histopatologi pada jaringan pembuluh darah jantung. Hasil penelitian menunjukkan bahwa minyak babi menyebabkan kenaikan kadar kolesterol total, LDL, HDL dan trigliserida didalam darah sebanyak masing-masing berturut-tuut 60%, 89%, 52% dan 42%. Minyak kelapa sawit menaikan kadar kolesterol total 15%, menurunkan kadar LDL 21%, menaikan kadar HDL 24% dan menurunkan kadar trigliserida 14%. Minyak kedelai menurunkan kolesterol total sebanyak 10%, LDL 30%, trigliserida 24% seraya menaikan kadar HDL sebanyak 3%. Penambahan tempe ke dalam minyak babi dapat menurunkan kadar kolesterol total 10%, LDL 44%, trigliserida 28% dan memelihara kadar HDL lebih tinggi dari sebelum perlakuan. Hasil pemeriksaan histopatologi menunjukkan bahwa pemberian

  3. Aspects of the chemistry of boron

    International Nuclear Information System (INIS)

    Moellinger, H.

    1976-01-01

    Crystal phases of elementary boron are reviewed as well as boron-sulphur, boron-selenum, boron-tellurium, and boron-nitrogen compounds, carboranes, and boron-carbohydrate complexes. A boron cadastre of rivers and lakes serves to illustrate the role of boron in environmental protection. Technically relevant boron compounds and their uses are mentioned. (orig.) 891 HK/orig. 892 MB [de

  4. RESPON PENDOPO JOGLO YOGYAKARTA TERHADAP GETARAN GEMPA BUMI

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    Bisatya W. Maer

    2008-01-01

    bangunan terhadap getaran gempa akibat adanya perbedaan sifat tumpuan. Analisis dalam tulisan ini didasarkan pada analisis beban gempa statik ekivalen (2 dan dibahas secara kualitatif Kata kunci: gempa, Pendopo Joglo, sistem tumpuan, repon struktur, peredaman.

  5. KAJIAN KADAR SERAT, KALSIUM, PROTEIN, DAN SIFAT ORGANOLEPTIK CHIFFON CAKE BERBAHAN MOCAF SEBAGAI ALTERNATIF PENGGANTI TERIGU

    Directory of Open Access Journals (Sweden)

    Dian Ayu Damayanti

    2014-05-01

    Full Text Available Study of Fiber, Calcium, and Protein Content and the Organoleptic Cha­rac­teristics of Mocaf Chiffon Cake as an Alternative Substitution of Wheat Flour. This research aims to identify the physical properties, the hedonic quality, the level of preferences, as well as the fiber, calcium, and protein contents of mocaf chiffon cakes. Data is analyzed using t-test. The results show: (1 the physical properties of colors has colors L (brightness, a+ (redness, and b+ (yellowish; (2 the highest value of preference level of color is 4.28; (3 the highest value of the hedonic quality of flavors is 4.60; (4 the highest value of the chemical properties of calcium is 10.53, (5 the lowest value of the protein content is 5.97 g, and (6 the highest value of fiber content is 4.34 g.   Penelitian ini bertujuan untuk mengetahui sifat fisik, mutu hedonik, tingkat kesukaan, kandungan serat, kandungan kalsium, dan kandungan protein chiffon cake berbahan mocaf. Jenis penelitian ini adalah penelitian eksperimen. Data dianalisis menggunakan uji-t. Hasil penelitian menunjukkan: (1 sifat fisik warna memiliki kisaran warna L (kecerahan, a+ (kemerahan, dan b+ (kekuningan; (2 tingkat ke­suka­­an warna memiliki nilai tertinggi 4,28; (3 mutu hedonik rasa memiliki nilai tertinggi 4,60; (4 sifat kimia kalsium memiliki nilai tertinggi 10,53; (5 kan­dung­an protein memiliki nilai terendah 5,97g; dan (6 kandungan serat memiliki nilai ter­tinggi  4,34 g.

  6. Structure and reactivity of boron-ate complexes derived from primary and secondary boronic esters.

    Science.gov (United States)

    Feeney, Kathryn; Berionni, Guillaume; Mayr, Herbert; Aggarwal, Varinder K

    2015-06-05

    Boron-ate complexes derived from primary and secondary boronic esters and aryllithiums have been isolated, and the kinetics of their reactions with carbenium ions studied. The second-order rate constants have been used to derive nucleophilicity parameters for the boron-ate complexes, revealing that nucleophilicity increased with (i) electron-donating aromatics on boron, (ii) neopentyl glycol over pinacol boronic esters, and (iii) 12-crown-4 ether.

  7. Pengaruh berbagai jenis penyamakan dan tipe finish terhadap morfologi, sifat organoleptis dan mekanis kulit biawak (Varanus salvator

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    Emiliana Kasmudjiastuti

    2015-12-01

    Full Text Available Monitor lizard (Varanus salvator skin is exotic leather because it has a unique grain. Therefore, the original grain of the animal needs to be maintained in the finishing process so that its performances look likes natural. This research aimed to study the effect of tanning materials (vegetable and chrome and the type of finish (natural, aniline, semi-aniline and two tone on morphology, organoleptic and mechanical properties of lizard skin. The materials used in this study were dry preserved lizard skins. The research varied on the types of tanning (vegetable and chrome and the type of finish (natural, aniline, semi-aniline and two tone each by varying the finishing materials (casein and protein binders. The tests were conducted on the observation of the structure using photomicrographs, rub fastness, adhesion of finish strength, tensile strength, elongation at break and organoleptic. The results showed that the best result was vegetable tanned lizard skin using natural finish with casein and met the requirements of SNI 06-4362-1996, lizard skin for shoe upper. This gave dry and wet rub fastness of 5 and 5 respectively; dry and wet adhesion of finish strength of 650 and 100 g/cm respectively; tensile strength of 207.43 kg/cm2; elongation at break of 37.52% and organoleptic value of panelists observations of 87.9 (good.

  8. PENGARUH RADIASI SINAR GAMMA COBALT-60 TERHADAP SIFAT MORFOLOGI DAN AGRONOMI KETIGA VARIETAS JAGUNG (ZEA MAYS L.

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    Makhziah

    2017-04-01

    Full Text Available Mutation is one of the ways to improve genetic variation in plant breeding so the target traits were more easily obtained. Grains of three varieties of maize (Bisma, Madura local, and Gumarang were treated with gamma 60cobalt irradiation doses (0, 100, 200, and 300 Gy before sowing then planted in a split plot randomized block design with three replication, to be evaluated for their morphology and agronomic traits. The Main plot was cultivars and sub plot was gamma radiation rates. There was no interaction between gamma rates and cultivars of maize, but increasing of gamma rates caused decreasing of some traits. Some traits such as plant height and leaves number were decreased significantly when gamma rate increased 100 to 300 Gy as well yield components such as grain weight and grain number per ear. Gamma 200 caused produce more ears than other rates. Bisma exhibited greater performance than Madura and Gumarang both of morphology and agronomic traits.

  9. FORMULASI TEPUNG LABU KUNING (Cucurbita maxima DAN TERIGU TERHADAP DERAJAT PENGEMBANGAN ADONAN DAN SIFAT ORGANOLEPTIK ROTI MANIS

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    Susilawati Susilawati

    2013-07-01

    Full Text Available The aim of the research was to determine the formulation of pumpkin flour and wheat flour for producing the best of dough improvement and organoleptic properties of sweet bread. The research was carried out in a complete randomized block design, single factor with 8 treatments and 3 replications. The 8 formulations of pumpkin flour and wheat flour  were: (F consisted of F1 (0:100, F2 (5:95, F3 (10:90, F4 (15:85, F5 (20:80, F6 (25:75, F7 (30:70, and F8 (35:65. The results showed that F3 was the best formulation to produce sweet bread with a dough improvement  2.51% and organoleptic with score of color 4.07 (yellow, texture 3.43 (somewhat soft, taste 3.50 (sweet, flavor 3.00 (somewhat typical pumpkin, and overall acceptance 3.70  (like. The sweet bread of F3 contained moisture 18.90%, ash 1.18%, fat 8.63%, protein 9.47%, crude fiber 3.11%, and carbohydrate (by difference 58.71%. Keywords:  Cucurbita maxima, pumpkin flour, sweet bread, wheat flour

  10. ASPEK PROSES DIAGENESIS TERHADAP SIFAT FISIK BATUPASIR FORMASI KEREK, DAERAH KALIPUTIH DAN SEKITARNYA, KECAMATAN SINGOROJO, KABUPATEN KENDAL, JAWA TENGAH

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    Vanny Hertanto Vahyu

    2012-07-01

    Full Text Available The sedimentary rock is formed and associated with the diagenesis processes, as all the physical, chemical, andbiological changes in the characteristics of a sediment accumulation from the time the grains are deposited untilthey are metamorphosed. This process is profoundly influence the characteristic of sedimentary rock, including thetexture, internal structure, mineral composition, cementation type, and pore space. Hence, it is important to knowor learn the stage of sandstone diagenesis, especially in the Kerek Formation to mark the correlation betweendiagenesis and physical properties of sandstone.The purpose of this research is to identify the stage of diagenetic processes, diagenetic environment, the type ofcementation, and the relationship between diagenetic stage and physical properties of sandstone. The methods usedin this research are survey method and data analysis method. The survey method includes the making of crosssectionalmeasured stratigraphy and data analysis method includes petrographic and scanning electron microscopy(SEM.The sedimentary structures found in the carbonate sandstones are burrows, convolute ripple lamination, gradedbedding, parallel lamination, cross lamination, current ripple lamination; which are features of turbidity deposition(Bouma sequence. Based on the petrography analysis results for sample P 01 and P 02 showed compaction,cementation, dissolution, and bioturbation, with a porosity value of 1 %. Sample P 03 showed compaction,cementation, dissolution, and bioturbation, with a porosity value of 7 %. Sample P 04 showed compaction,cementation, and dissolution, with a porosity value of 1 %. Sample P 06 showed compaction, cementation,dissolution and replacement, with a porosity value of 5 %. Sample P 07 showed compaction, and cementation, witha porosity value of 30 %. The Lithology type in the research area was Calcarenite with dominant shell fragment,the lithology names are Packed biomicrite (Folks, 1959; in Nichols, 2009, and Packstone (Dunham, 1962; inNichols, 2009. Carbonate sandstones predominantly feldspar and quartz minerals and the lihtology names areCarbonate quartz wackes (Pettijhon, 1975; in Nichols, 2009, and Carbonate feldspathic arenite (Pettijhon, 1975;in Nichols, 2009. There are three minerals type of cement showed in carbonate sandstones which are calcite,chlorite and pyrite cements.The results of this research indicate that the diagenesis stages of carbonate sandstones showed cementation,dissolution, replacement, bioturbation, and compaction processes, and the more stages of diagenesis that occurs incarbonate sandstones will result in reduced porosity and progressively up at for formation stratigraphy excelsiorsediment rock assess its porosity is equal to 1%, 5%, 7% and 15% respectively. The type of cement minerals in thecarbonate sandstone influence porosity, especially in carbonate sandstone which there are chlorite cement that havesmall porosity value of 1%, 5% and 7%. The environment of diagenesis in carbonate sandstones that is phreatic andburial experienced of eogenesis process, mesogenesis process and telogenesis process.

  11. Penelitian pengaruh variasi bahan pelunak naphtenic oil terhadap sifat fisis tegangan putus dan perpanjangan putus kompon karet untuk alas sapi

    Directory of Open Access Journals (Sweden)

    Luciawati Sunarjo

    1996-12-01

    Full Text Available The aim of this research is to know influence of plasticizer naphtenic oil to the physical properties of tensile strength and elongation at break of rubber compound for cowmats. It makes from Rubber Smoke Sheet (RSS and Styrene Butadiene Rubber 1502 (SBR as raw material with addition ingredients are Calcium Carbonate, FEF black, Stearic Acid, Zinc Oxide, Plasticizer Naphtenic Oil, Paraffine Wax, TMT, CBS, AOSP and Sulphur as Vulcanizing agent. Rubber compound for cowmats, formed to slab by hydraulic press at 1500C and 150 Kg/cm2. Than tested tensile strength and elongation at break. The result of this research indicated that platicizer naphtenic oil (x and tensile strength have regression equation as Y1 = 24.168 – 0.634 X (r = 0.87, while naphtenic oil and elongation at break have regression equation as Y2 = 236.32 + 21 X (r = 0.88.

  12. Pengaruh Ameliorasi Terak Baja Dan Pengaturan Tinggi Muka Air Tanah Terhadap Sifat Biologi Gambut Perkebunan Kelapa Sawit

    OpenAIRE

    Muharis, Satria

    2016-01-01

    This study was conducted in peat Oil Palm Plantation PTPN IV Kebun Panai Jaya province of North Sumatra and in cooperation with the Oil Palm Research Center (PPKS). The purpose of this study do sustainable peatland management by utilizing steel waste as fertilizer (ameliorant) and setting the ground water level. Giving ameliorant aims to increase levels of nutrients in the soil, while the management of groundwater levels to prevent subsidence in the peat. With the addition of ameliorant and s...

  13. PENGARUH JENIS PENGEMAS TERHADAP RETENSI KAROTEN, SIFAT FISIK DAN KIMIA GULA KELAPA YANG DIPERKAYA MINYAK SAWIT MERAH SELAMA PENYIMPANAN

    Directory of Open Access Journals (Sweden)

    Vicencius Prihananto

    2015-10-01

    hingga penyimpanan selama 2 bulan, kadar air produk pada semua perlakuan masih dalam kisaran standar SNI-013743-1995 (< 10 %, yaitu antara 8,55 % - 9,94 %. Kata kunci: Minyak sawit merah, retensi karoten, gula kelapa, penyimpanan, pengemas

  14. Substitusi Labu Kuning (Cucurbita Moschata Dan Tepung Beras Terhadap Peningkatan Nilai Gizi, ?-Karoten Dan Sifat Sensoris Kue Ombus-Ombus

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    Agus Duniaji

    2016-09-01

    Full Text Available The research was conducted to determine the effect of pumpkin and rice flour ratio to Nutrition Value and ?-carotene content of ombus-ombus cake. This research using randomized block design with 5 treatment of substitution of pumkin and flour rice: 0% pumpkin: 100% rice flour, 20% pumpkin: 80% rice flour, 30% pumpkin: 70% rice flour, 40% pumpkin:60% rice flour, 50% pumpkin: 50% rice flour. Those treatment repeated 3 times. Data obtained analyzed with anova, treatment with significant different tested by Duncan test. The results of the research showed that substitution of pumpkin and rice flour gave different effect on water content, ash content protein content, fat content, carbohydrate content, ?-carotene, colour, taste, aroma, and overall acceptance. substitution 50% of pumpkin and 50% rice flour gave the nutrition value of ombus-ombus cake with water 48.70%, ash 6.16%, protein 4.44%, fat 0.18%, carbohydrates 41.58 %, and  ?-carotene 6.31%, while sensories evaluation such as color 4,3 (yellow, flavor 4,4 (like, aroma 4,2 (typical pumpkin and overall acceptance 4,8 (really like by the panelists.

  15. ANALISIS ARAH DAN PERLAKUAN SERAT TAPIS SERTA RASIO EPOXY HARDENER TERHADAP SIFAT FISIS DAN MEKANIS KOMPOSIT TAPIS/EPOXY

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    Putu Lokantara

    2012-11-01

    Full Text Available Tapis kelapa (Coconut filter as natural fiber, in this time its resources very copius but no longer be exploited and thrown off hand as waste though in fact its used for other material dissimilar inovatif and high economic valuable that is as one of natural fiber alternative to be composite. The objective of this research is to investigate the behavior changing of physical and mechanical properties of composite tapis kelapa as reinforcement and epoxy 7120 with hardener Versamid 140 as matrix. The fiber is treated with the chemical NaOH and KMnO4 with percentage 0.5%, 1%, and 2% in weight, respectively. The ratio of epoxy and hardener is 7:3 and 6:4, and fiber orientation 0o, 45o, dan 90o. For testing of the speciment in tensile test with ASTM standard D3039 and three point bending test with ASTM standard D790. The result of this research obtained that fiber treatment with KMnO4 give the better effect to machine properties compared to NaOH. Variation of percentage 0.5%, 1%, and 2% NaOH and KMnO4 give the effect in fiber surface which higher percentage make the cleaner of surface, decrease of wax contain, and roughness of fiber surface so that stronger of linkage of fiber and matrix and increase of tensile strength, bending strength, and bending modulus of the composite. The highest tensile strength, modulus of elasticity and bending strength are 70.23 MPa, 446.24 GPa and 97.81 MPa respectively reached at composite with ratio epoxy/hardener 7:3; by 2% KMnO4 and fiber orientation 45o. While the highest modulus of elasticity is 385.48 GPa reached at composite with the ratio epoxy/hardener 6:4; 2% KMnO4 and fiber orientation 90o. Keywords: Tensile Strength, bending strength, ratio of epoxy/hardener, NaOH, KMnO4

  16. Efek Waktu Wet Milling dan Suhu Annealing Terhadap Sifat Fisis, Mikrostruktur dan Magnet dari Flakes NdFeB

    OpenAIRE

    Sipahutar, Wahyu Solafide

    2015-01-01

    Had made research manufacture NdFeB magnets of flakes of wet milling process using a ball mill to the physic properties, microstructure, and magnetic properties with variations milling time is 16 hours, 24 hours, 48 hours, 72 hours. Powder result of mechanical milling using a ball mill and then analyzed the resulting particle size by using PSA and XRD. Then do the manufacture of test samples in the form of pellets by compaction process through print isotropy. Having obtained a sample of pelle...

  17. Pengaruh Konsentrasi Ekstrak Etanolik Daun Teh Hijau (Camellia sinesis L. dalam Sediaan Krim terhadap Sifat Fisik dan Aktivitas Antibakteri

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    Naniek Widyaningrum

    2012-12-01

    Design and Method: In this study, green tea leaf extract condensed obtained by maceration using 50% ethanol solution. Cream formula that is made in five concentration ethanolic extract of green tea leaves 1%, 3%, 5%, 7%, and 9% use a modified formula antiacne cream. Cream tested physical properties include homogenity, percent separation, dispersive power and adhesion. During the antibacterial activity was also tested. The data obtained were analyzed statistically using the non-parametric Kruskal-Wallis test followed by Mann Whitney test with a level of 95%. Results: The preparation cream ethanolic leaf green tea extract at various concentrations have good homogenity and not separate, the greater concentration of cream ethanolic extract of green tea leaves get smaller power and energy dispersive adhesion, whereas the inhibitory against Staphylococcus aureus bacteria is getting biger. Conclusion: Cream ethanolic extract of green tea leaves that are comparable with the positive control (Ristra acne creaming the physical properties and the antibacterial activity at a concentration of 7% (Sains Medika, 4(2:147-156.

  18. KAJIAN SIFAT FISIK, KIMIA DAN FISIOLOGI TERHADAP BEBERAPA TINGKAT KEMATANGAN BUAH RAMBUTAN VARIETAS SI MACAN DI KABUPATEN GUNUNG KIDUL YOGYAKARTA

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    Siti Nurhayati

    2016-10-01

    Full Text Available The aim of this research was to determine theee effect of physical, chemical and physiological characteristic of several stages maturity of rambutan cultivar Simacan in Wonosari, Gunung Kidul, Yogyakarta. This experimental research was conducted from March to May 2004 used a single factorial Randomized Complete Design (RCD, consisted of six levels, i.e.: A (Rambutan fruit with red stages of maturity, B (Rambutan fruit with yellowness red stages of  maturity, C (Rambutan fruit with yellow  stages of  maturity,  D (Rambutan fruit with greennes  yellow stages of  maturity, E (Rambutan fruit with green  stages of  maturity.  The treatment was done in three replications. The research result showed that (i According to the physical characteristics (weight of whole fruit, fruit flesh and flesh thickness, rambutan in red stages of maturity (84,340%, the highest sugar content was in the red stages of maturity (86,20%, the highest vitamin C content was in the red stages of maturity (29,151% and the highest total solution soluble was in the yellow stages of maturity (15,104% (iii. According to the physiological characteristics, the highest respiration rate was in the greenness yellow fruits stage of maturity ( 0,0495%. Based on the research, it is better for  farmers to harvest rambutan Simacan once they are in red stage. In this stage the rambutan will have its highest sugar, and vitamin C contents.

  19. FORTIFIKASI JAGUNG MANIS DAN KACANG HIJAU TERHADAP SIFAT FISIK, KIMIA DAN ORGANOLEPTIK SUSU JAGUNG MANIS KACANG HIJAU

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    Sri Setyani

    2012-12-01

    Full Text Available Sweet corn-mung bean milk can be used to helping increasing the nutrition status of the society . This research was aimed to find the formulation of sweet corn and mung bean that produce sweet corn-mung bean milk with the best physical, chemical and sensory characteristics and is accepted by consument. The experiment was arranged in a completely block randomized design (CBRD withy one factor and three replications. The treatments were five  formulations of sweet corn and  mung bean , they were 3:1 (F1, 2:1 (F2, 1:1 (F3, 1:2 (F4, and 1:3 (F5 (w/w. The data were analysed using analysis of variance, and then continued with 1 % and 5 % Least Significant Different Test. The determinination of the water addition that produced mung bean-sweet corn milk that is compliance with the total solid in SNI (11.5 % was done in the preliminary research. The preliminary research result showed that mung bean sweet corn milk has total solid of 15-19% for all of formulations, while the best favorable milk was  milk with the formulation: water that is at 1:10. The result of the main research showed that the stabilityobjectively, protein content, and organoleptic characteristic were not significanly different among sweet corn and mung bean formulations, but the stability visually, the viscosity, soluble total solid and fat content were significanltly different among sweet corn and mung bean formulation. According to the SNI (soluble total solid, protein and fat contents are the formulation that have met the soy milk quality standard, but the best formulation was found in  F2, with the protein content of 3,183% , fat content of 3,667%, and the most favourable formulation was  F2 formulation with 1, 893 score. The result of amino acid analysis on the best mung bean-sweet corn milk showed that five types of essential amino acid (threonine, valine, isoleucine, leucine and lysine have not met the amino acid standard yet by FAO (1973. In conclusion, the combination of sweet corn and mung bean become mung bean sweet corn milk has not overcome the lack of lysine on corn and methionine on mung bean yet. Keywords : ,Amino acid,  sweet corn, mung bean

  20. Pengaruh Pemberian Vermikompos dan Biochar Jerami Padi terhadap Sifat Biologi Tanah dan Kapasitas Menyimpan Air pada Tanah Ultisol

    OpenAIRE

    Ramadhan, Azhari

    2016-01-01

    Soil biology and soil water holding capacity is an important aspect in determining the health of the soil. Giving vermicompost and paddy straw biochar can affect the biological properties of the soil and ultisol soil water holding capacity. This study aimed to determine the effect of vermicompost and paddy straw biochar on biological properties of the soil and the ultisol water holding capacity. The research was conducted in the laboratory. This research used randomized block design with one ...

  1. Pengaruh Pelapisan Kitosan terhadap Sifat Fisik dan Kimia Tomat Segar (Lycopersicum pyriforme pada Berbagai Tingkat Kematangan

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    Melly Novita

    2012-10-01

    Full Text Available Tomato fruit undergoes many physicochemical changes after harvest caused by the process of metabolism. The method used to inhibit the metabolic processes in tomatoes can be overcome by controlled atmosphere storage. However, this method requires a high cost. Therefore there is another method that is more practical and economical to imitate the mechanism of the controlled atmosphere is by the use of coating materials (coating. Coating material must be able to form a barrier layer of the loss of water content and can maintain fruit quality and does not pollute the environment. Chitosan is a natural alternative as a coating material that is non-toxic and safe for health. This study aimed to observe the effect of chitosan coating on quality and shelf life of fresh tomatoes at different maturity levels. The study design used was completely randomized design (CRD factorial with two factors. The factor I was the maturity stages which consisted of 3 (three levels : K1 = full green (0-10% red skin, K2 = light red (30-60% red skin, K3 = ripe ( > 70% red skin. Factor II is storage duration which consisted of 5 (five level : P1 = 0 day, P2 = 5 days, P3 = 10 days, P4 = 15 days, P5 = 20 days, with 2 (two replications. The analysis conducted on tomatoes were weight loss, solusble solids concentration, total acid, and vitamin C. The results showed that the tomatoes were coated chitosan could inhibit weight loss, soluble solids concentration, total acid, and vitamin C than untreated tomatoes (control. Chitosan coating with a concentration of 1% and a long soaking for 10 minutes on the tomatoes with the maturity stages of 0-10% skin red and 30-60% skin red could maintain in good condition for 20 days of storage. But the tomatoes with the maturity stage > 70% red skin only able to survive 10 days of storage.

  2. Studi pengaruh umur dan tinggi batang terhadap struktur serat sifat fisik morfologi dan kimia batang bambu apus Gigantochloa Apus Kurz

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    Hery Purnobasuki

    2001-12-01

    Full Text Available Characteristic and anatomical study of Gigantochloa apus was carried out to know the fiber structure, morphological, physical, and chemical properties on various age and part of culm height. The research was done by ex post facto design and the data was analyzed by observational description. For anatomical observation, materials were processed using paraffin, PEG, and wood method and maceration for fiber structure. The result showed that inter-nodus amount, diameter, and wall thickness was increase in older culm. Fiber length was 3.8 mm in average, and older culms have longer fiber than the young ones and within the same culm, the lower part had longer fibers than the upper part. The fresh density (0.97-1.17 g/ml and the oven dry density (0.57-0.79 g/ml of this bamboo, it was higher for the older culm than younger culm. Liquor sorption (in NaOH 5% solution into bamboo chips was fairly good. The sorption into the young bamboo was faster and better than into older bamboo. Young bamboo culms contain more water than older culms and the top part within the same culm contain litte water than lower part. The total cellulose in young bamboo culm was higher than the older (64%-54%, but the lignin on the contrary in lower (14%-28%. At the bottom part, the lignin was higher than the upper prt. The ash content was high (1.6%-4.5% and its fluctuated based on age and the height part of culm.

  3. Pengaruh serbuk serat batang pisang sebagai filler terhadap sifat mekanis dari komposit PVC– CaCO3

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    Supraptiningsih

    2012-12-01

    Full Text Available ABSTRACT The aim of research was to study the effect to the mechanical properties of banana fiber as a filler of PVC-calcium carbonate composite. Banana stem powder was made from banana stem which was grounded and soaked in 15 % NaOH for 24 hours to remove the lignin, dried and screened to 200 mesh, PVC-calcium carbonate composite was made using a Two Roll Mill at o temperature of 50 C, for 10 minutes and 50 rpm. The composition of PVC and additiveswere not varied, while the variations made on banana fiber, ie 0, 10; 20, 30, and 40 phr (per hundred resin. The observation showed the mechanical properties of PVC- calcium carbonate 2 composite has value of weight per unit area between 4.55 to 5.90 kg/m , bulk densities from 1.503 3 2 to 1.999 g/cm , tensile strength from 67.56 to 79.03 kg/cm , hardness 55.00 to 66.66 shore D, 2 water absorption from 0.960 to 3.322 %, flexibility test from 118.99 to 165.09 kg/cm , flash point 0.032 0.075 inc / sec, water density was good (not drop happened and the ability of sawed and nailed was good (no defected/cracked. When the test results of PVC-calcium carbonate composite with banana fiber compared with SNI 15-0233-1989 Mutu dan Cara Uji Lembaran Serat Semen, indicates that

  4. Kajian Sifat Fisik Dan Kimia Tepung Labu Kuning (Cucurbita Maxima) Dengan Perlakuan Blanching Dan Perendaman Natrium Metabisulfit (Na2s2o5)

    OpenAIRE

    Purwanto, Chatrine Chrisandy; Ishartani, Dwi; Muhammad, Dimas Rahadian Aji

    2013-01-01

    Penelitian ini bertujuan untuk mengetahui sifat fisik dan kimia tepung labu kuning yang diberi perlakuan blanching dan perendaman natrium metabisulfit. Penelitian ini terdiri dari dua tahap utama, yaitu pembuatan tepung labu kuning dan pengujian sifat fisik dan kimia tepung labu kuning. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan dua kali ulangan analisa. Data yang diperoleh dianalisis dengan metode Analysis of Variance (ANOVA). Bila ada perbedaan antar perlakuan maka dilan...

  5. Daya Bunuh Hand Sanitizer Berbahan Aktif Alkohol 59% dalam Kemasan Setelah Penggunaan Berulang terhadap Angka Lempeng Total (ALT

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    Isnaeni Walidah

    2014-03-01

    Full Text Available Kebersihan merupakan tahap awal untuk menjaga pola hidup sehat dan terhindar dari penyakit. Pencegahan penyebaran penyakit salah satunya adalah dengan mencuci tangan menggunakan antiseptik hand sanitizer.  Hand sanitizer berbahan aktif alkohol 40 – 80%  mampu menghambat pertumbuhan bakteri. Tetapi pemakaian hand  sanitizer yang tidak langsung habis akan mempengaruhi kualitas hand sanitizer Penggunaan berulang hand sanitizer akan mempengaruhi kemampuan bahan aktif dalam membunuh kuman karena alkohol sebagai bahan aktif pada hand sanitizer memiliki sifat yang mudah menguap. Tujuan penelitian untuk mengetahui daya bunuh hand sanitizer berbahan aktif alkohol 59% dalam kemasan setelah penggunaan berulang terhadap angka lempeng total. Metode  penelitian analitik observasional, menggunakan 10 responden yang diuji angka lempeng total pada tangan setelah penggunaan berulang hand sanitizer dari volume 50 ml sampai dengan ± 25 ml dan dari volume ± 25 ml sampai dengan ± 12,5 ml. Hasil penelitian menunjukkan daya bunuh hand sanitizer berbahan aktif alkohol 59% dalam kemasan setelah penggunaan berulang dari volume 50 ml sampai volume ± 25 ml sebesar  21,38%. Sedangkan daya bunuh hand sanitizer pada penggunaan berulang  hand sanitizer dari volume ± 25 ml sampai dengan volume ± 12,5 ml sebesar 15,83%. Ada pengaruh penggunaan berulang hand sanitizer berbahan aktif alkohol 59% dalam kemasan terhadap jumlah angka lempeng total

  6. Pemanfaatan serat silicon carbon dan partikel alumina pada matrik aluminium untuk meningkatkan sifat mekanis material komposit

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    Ketut Suarsana

    2017-03-01

    Full Text Available Abstrak: Pemanfaatan penguat material komposit berbasis serat dan juga partikel pada pembuatan bahan komposit sekarang ini sangatpotensial untuk dikembangkan dan diteliti. Beragam sumber serat dan juga penguat dalam bentuk partikel bisa didapat dari seratalami dari tumbuh-tubuhan dan juga serat yang sudah dikenakan perlakuan sebelumnya. Indonesia memiliki potensi sumberalam yang sangat potensial terutama sebgai sumber serat dari tumbuhan juga berupa logam aluminium (bauxite dari fosil.Bahan ini dapat dimanfaatkan untuk kebutuhan masyarakat industri sebagai bahan dasar pembuatan komposit bermatrikAluminium dan sebagai penguat berupa serat maupun partikel alumina. Metode pembuatan Aluminum Matrix Composite (AMCdengan proses metalurgi serbuk pada gaya tekan/kompaksi 2,5 ton mengunakan alat press hydrolik, waktu penahanan 15menit, serta proses perlakuan pada variasi komposisi berat (%wt. Variasi komposisi penguat serat Silicon Carbon (SiC danAl2O3 (alumina pada matrik Aluminium adalah : 30% SiC + 0% Al203, 27% SiC + 3% Al203, 24% SiC + 6% Al203 dan 21% SiC+ 9% Al203 dengan matrik 70% Al, pada kondisi tempertaur 500oC, 550oC dan 600oC. Setelah material komposit terbentuk, diujiuntuk mengetahui sifat mekanik akibat pengaruh variasi komposisi antara matrik dan penguatan pada komposit. Uji karakteristikdilakukan di laboratorium untuk menggetahui sifat kekuatan dan kekerasan material komposit. Selanjutnya dicari hubunganantara sifat masing-masing komposisi penguat serat SiC dan Al2O3 pembentuk komposit yang dibuat untuk mengetahui manfaatdari penguat serat dan partikel alumina.Kata Kunci: Sifat kekuatan, kekerasan, serat SiC dan Al2O3 Abstract: Utilization reinforcement fiber-based composite material and particles in the manufacture of composite materials now havepotential to be developed and researched. Various sources of fiber and reinforcement in particle form can be obtained fromnatural fibers from plants and fiber that has been subjected to a

  7. Pengaruh Perbedaan Jenis Asam dan Waktu Demineralisasi pada Nilai Rendemen dan Sifat Fisiko Kimia Gelatin Tulang Sapi Bali.

    OpenAIRE

    Ramadani, Dewi

    2014-01-01

    2014 Dewi Ramadani (I 411 10 267). Pengaruh Perbedaan Jenis Asam dan Waktu Demineralisasi pada Nilai Rendemen dan Sifat Fisiko Kimia Gelatin Tulang Sapi Bali. Muhammad Irfan Said Sebagai Pembimbing Utama dan Farida Nur Yuliati Sebagai Pembimbing Anggota. Gelatin merupakan senyawa hasil hidrolisis serabut kolagen secara persial. Tujuan dari penelitian ini adalah untuk melihat pengaruh jenis larutan dan waktu demineralisasi pada nilai rendemen dan sif...

  8. Pengaruh Negative Framing dan Adverse Selection terhadap Eskalasi Komitmen

    OpenAIRE

    Arimawan, Muhammad Sandi; Sukirno, Sukirno

    2014-01-01

    Penelitian ini dilakukan bertujuan untuk mengetahui: (1) Pengaruh negative framing terhadap eskalasi komitmen, (2) Pengaruh adverse selection terhadap eskalasi komitmen, (3) Pengaruh negative framing dan adverse selection secara bersama-sama terhadap eskalasi komitmen, (4) Pengaruh negative framing terhadap eskalasi komitmen dimoderasi locus of control, (5) Pengaruh adverse selection terhadap eskalasi komitmen dimoderasi locus of control, (6) Pengaruh negative framing dan adverse selection se...

  9. PREDIKSI WAKTU LAYAN BANGUNAN BETON TERHADAP KERUSAKAN AKIBAT KOROSI BAJA TULANGAN

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    Agus Santosa Sudjono

    2005-01-01

    Full Text Available Concrete is known as a porous building material, this can causes materials outside the concrete mass infiltrate into the concrete. Concrete structures constructed around the beach/seashore tend to have deterioration problems due to salt attack. This paper discusses models to predict the service life of concrete structure based on the deterioration problems. The service life of concrete structure is divided into three periods. Period I is time needed by Cl−ion to infiltrate into concrete up to the surface of the reinforcement, period II is time needed by corrosion products to fill the transition zone pores, and period III is deterioration time. The value of parameters used in the proposed equations is derived from the result of experiments. Finally, the proposed equations were evaluated by the relationship between variations of depth of concrete cover, water cement ratio (W/C and distance of structure from shore line with service life. It could be concluded that the results of the prediction is satisfactory. Abstract in Bahasa Indonesia : Beton dikenal sebagai bahan bangunan yang berpori. Sifat ini menyebabkan senyawa dari luar dapat berinfiltrasi ke dalam beton. Bangunan beton yang dibangun di sekitar daerah pantai/laut cenderung mengalami kerusakan akibat serangan garam klorida. Makalah ini mendiskusikan model untuk memprediksi waktu layan bangunan beton terhadap kerusakan akibat korosi baja tulangan. Waktu layan bangunan beton dibagi menjadi tiga periode. Periode I adalah waktu yang dibutuhkan oleh ion Cl− untuk melakukan infiltrasi sampai ke permukaan baja tulangan, Periode II adalah waktu yang dibutuhkan oleh senyawa hasil korosi untuk mengisi pori-pori yang ada di transition zone, dan Periode III adalah waktu kerusakan pada bangunan beton. Parameter-parameter yang digunakan dalam persamaan yang diusulkan ditentukan dari hasil pengukuran di laboratorium. Persamaan tersebut dievaluasi dalam hal hubungan antara variasi tebal selimut beton

  10. Pulverization of boron element and proportions of boron carbide in boron

    International Nuclear Information System (INIS)

    Lang, F.M.; Finck, C.

    1956-01-01

    It is possible to reduce boron element into fine powder by means of a mortar and pestle made of sintered boron carbide, the ratio of boron carbide introduced being less than one per cent. Boron element at our disposal is made of sharp edged, dark brown, little grains of average size greater than 5 μ. Grain sizes smaller than 1μ are required for applying thin layers of such boron. (author) [fr

  11. PENGARUH PANJANG ENTRES TERHADAP KEBERHASILAN PENYAMBUNGAN TANAMAN ALPUKAT (PERSEA AMERICANA MILL.

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    Dirgahani Putri

    2016-06-01

    Full Text Available Beragamnya hasil produksi dan kualitas buah alpukat dapat diperbaiki dengan metode penyambungan. Penyambungan merupakan kegiatan untuk mengga-bungkan dua atau lebih sifat unggul dalam satu tanaman. Penelitian ini bertujuan mengetahui pengaruh berbagai panjang entres terhadap keberhasilan penyam-bungan tanaman alpukat. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok dengan lima perlakuan panjang entres, yaitu 3 cm, 6 cm, 9 cm, 12 cm, dan 15 cm.Setiap perlakuan diulang sebanyak lima kali dan setiap perlakuan terdiri atas lima tanaman;sehingga jumlah totalnya sebanyak 125 tanaman. Pengamatan dilakukan pada peubah persentase sambung hidup, jumlah tunas, panjang tunas, jumlah daun, dan diameter batang atas. Berbagai panjang entres tidak memberikan pengaruh yang nyata pada peubah persentase sambung hidup, panjang tunas terpanjang, jumlah daun, dan diameter batang atas tetapi berpengaruh nyata pada peubah jumlah tunas. Perlakuan panjang entres 15 cm memberikan hasil tertinggi untuk jumlah tunas, panjang tunas, jumlah daun dan diameter batang atas, sedangkan untuk persentase hidup perlakuan 6 cm, 12 cm memberikan hasil tertinggi yaitu 100%. Perlakuan panjang entres 3 cm adalah perlakuan yang memberikan pengaruh yang rendah pada persentase sambung hidup (yaitu 92%, peubah jumlah tunas, panjang tunas, serta diameter batang atas pada berbagai umur tanaman alpukat.

  12. Pengaruh Pencucian Daging Lumat Ikan Patin Siam terhadap Karakteristik Dendeng yang Dihasilkan

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    Suryanti Suryanti

    2010-06-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui pengaruh pencucian daging lumat ikan patin siam (Pangasius hypopthalmus terhadap karakteristik dendeng. Ikan patin siam hidup diberi perlakuan pemberokan selama 24 jam, kemudian dimatikan dengan cara perendaman dalam es selama ± 20 menit. Daging dipisahkan dari tulang dan kulit serta digiling hingga diperoleh daging lumat. Daging lumat diberi perlakuan pencucian satu sampai tiga kali masing-masing dalam air suhu 4-5oC dengan perbandingan 1:5 (b/v, yang dilanjutkan dengan pengepresan. Daging lumat yang diperoleh dari masing-masing perlakuan pencucian kemudian diolah menjadi dendeng dengan mencampurkan bahan tambahan gula putih, garam serta rempah-rempah seperti bawang putih (2%, bawang merah (1,5%, ketumbar (2,5%, asam jawa (3%, lengkuas (2,5%, dan jahe (0,5%. Tahap selanjutnya adalah pencetakan campuran bahan dalam loyang dan dikeringkan dengan sinar matahari selama ±15 jam. Hasil pengamatan menunjukkan bahwa semakin banyak perlakuan pencucian menyebabkan kandungan protein dan karbohidrat semakin kecil, dan sifat tekstur (kekuatan tarik dan elongasi semakin besar. Dendeng berwana coklat kekuningan dengan rasa dan aroma rempah-rempah, sedangkan tekstur agak kenyal dan tidak mudah sobek. Dendeng dari perlakuan satu sampai tiga kali pencucian memiliki nilai angka lempeng total (ALT antara <25 x 102 sampai dengan 1,6 x 104 kol/g serta tidak terdapat kapang yang tumbuh.

  13. PENGARUH KADAR TRIPTOPAN PAKAN TERHADAP PERTUMBUHAN DAN SINTASAN KRABLET KEPITING BAKAU, Scylla serrata SELAMA MASA PENDEDERAN

    Directory of Open Access Journals (Sweden)

    Usman Usman

    2017-01-01

    Full Text Available Kepiting bakau bersifat kanibal dan cenderung memiliki laju pertumbuhan yang lambat ketika diberi pakan buatan. Triptopan adalah salah satu asam amino esensial untuk pertumbuhan dan merupakan prekursor pembentukan serotonin yang dapat mengontrol sifat agresif pada beberapa vertebrata. Penelitian ini bertujuan untuk mendapatkan dosis optimum triptopan pakan terhadap pertumbuhan dan sintasan krablet selama masa pendederan. Empat dosis penambahan L-triptopan dalam pakan yaitu: 0% (A; 0,25% (B; 0,5% (C; dan 1,0% (D dengan kadar triptopan dalam pakan berturut-turut 0,41%; 0,52%; 0,67%; dan 0,96%; serta kontrol berupa pakan rebon kering (E yang mengandung triptopan sebanyak 0,79%. Hewan uji yang digunakan adalah krablet kepiting bakau berumur 3-5 hari sejak memasuki stadia krablet. Krablet dipelihara dalam bak fiber berukuran 1,0 m x 1,0 m x 0,5 m sebanyak 15 unit dengan kepadatan masing-masing 50 ekor/m2. Selama lima minggu pemeliharaan, krablet diberi pakan uji sebanyak 30%-15%/hari. Hasil penelitian menunjukkan bahwa krablet yang diberi pakan mengandung triptopan 0,67% menunjukkan laju pertumbuhan tertinggi dan berbeda nyata (P0.05 among the treatments.

  14. Tinjauan Yuridis Terhadap Cybercrime di Indonesia

    OpenAIRE

    Azamul Fadhly Noor

    2005-01-01

    Modus operandi Cybercrime sangat beragam dan terus berkembang sejalan dengan perkembangan teknologi, tetapi jika diperhatikan lebih seksama akan terlihat bahwa banyak di antara kegiatan-kegiatan tersebut memiliki sifat yang sama dengan kejahatan-kejahatan konvensional yang selama ini sudah dikenal, oleh Azamul Fadhly Noor 05002515

  15. Shock Response of Boron Carbide

    National Research Council Canada - National Science Library

    Dandekar, D. P. (Dattatraya Purushottam)

    2001-01-01

    .... The present work was undertaken to determine tensile/spall strength of boron carbide under plane shock wave loading and to analyze all available shock compression data on boron carbide materials...

  16. Boronated liposome development and evaluation

    International Nuclear Information System (INIS)

    Hawthorne, M.F.

    1995-01-01

    The boronated liposome development and evaluation effort consists of two separate tasks. The first is the development of new boron compounds and the synthesis of known boron species with BNCT potential. These compounds are then encapsulated within liposomes for the second task, biodistribution testing in tumor-bearing mice, which examines the potential for the liposomes and their contents to concentrate boron in cancerous tissues

  17. SOIL PROPERTIES OF EIGHT FOREST STANDS RESULTED FROM REHABILITATION OF DEGRADED LAND ON THE TROPICAL AREA FOR ALMOST A HALF CENTURY (Sifat-sifat Tanah Delapan Tegakan Hutan Hasil Rehabilitasi Lahan Terdegradasi pada Daerah Tropika Selama Setengah Abad

    Directory of Open Access Journals (Sweden)

    Haryono Supriyo

    2013-11-01

    Full Text Available ABSTRACT Physical, chemical and biological properties of soil are influenced by vegetation types which grow above it. Different tree species of stands will produce difference litter quantity, litter quality and also plants’ root system. Therefore quantifying physical and chemical soil properties in several stands after rehabilitation of degraded land will increase the understanding of forest soil characteristics. The research was conducted in 8 forest stands in Wanagama I, Gunungkidul, Yogyakarta. Collection of soil samples was done at the depth of 0-10, 10-30 and 30-50 cm by making soil profile. The result showed that the textural classes were from sandy clay loam to clay. The content of clay increased with increasing soil depth. Bulk density did not differ much among the profiles and soil depth, ranging from 0.90 to 1.28 g/cm3, and so were particle density ranged from 2.19 to 2.55 g/cm3 and pore space ranged from 47.89 to 58.08 %. pH H2O ranging from 5.81 to 7.49 (slightly acid to neutral, meanwhile  pH KCl ranging from 4.44 to 6.37. C-organic content varied widely among the vegetations and soil depth ranged between 0.11 and 5.17 %. Available P and total P varied widely from 1 to 104 ppm and from 20 to 390 ppm, respectively. CEC were not much different among the profiles and soil depths, ranging from 19.80 to 38.06 cmol (+/kg and base saturation in all samples were very high i.e. > 100 %.   ABSTRAK Sifat-sifat fisik, kimia dan biologi tanah dipengaruhi oleh tipe vegetasi yang tumbuh di atasnya. Perbedaan spesies pohon suatu tegakan akan menghasilkan perbedaan jumlah seresah, kualitas seresah dan juga sistem perakaran. Kuantifikasi sifat-sifat fisik dan kimia tanah pada beberapa tegakan hutan pada lahan terdegradasi setelah direhabilitasi akan meningkatkan pemahaman mengenai sifat-sifat tanah hutan. Penelitian dilakukan pada I jenis tegakan hutan di Hutan Pendidikan Wanagama, Gunungkidul, Yogyakarta. Pengambilan sampel tanah dilakukan pada

  18. Implantation of boron in silicon

    International Nuclear Information System (INIS)

    Hofker, W.K.

    1975-01-01

    The distribution versus depth of boron implanted in silicon and the corresponding electrical activity obtained after annealing are studied. The boron distributions are measured by secondary-ion mass spectrometry. Boron distributions implanted at energies in the range from 30 keV to 800 keV in amorphous and polycrystalline silicon are analysed. Moments of these distributions are determined by a curve-fitting programme and compared with moments calculated by Winterbon. Boron distributions obtained by implantations along a dense crystallographic direction in monocrystalline silicon are found to have penetrating tails. After investigation of some possible mechanisms of tail formation it is concluded that the tails are due to channelling. It was found that the behaviour of boron during annealing is determined by the properties of three boron fractions consisting of precipitated boron, interstitial boron and substitutional boron. The electrical activity of the boron versus depth is found to be consistent with the three boron fractions. A peculiar redistribution of boron is found which is induced by the implantation of a high dose of heavy ions and subsequent annealing. Different mechanisms which may cause the observed effects, such as thermal diffusion which is influenced by lattice strain and damage, are discussed. (Auth.)

  19. Pengaruh Fungi Indigenous Toleran Zn terhadap Pertumbuhan Bibit Jagung di Media Tailing Steril

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    Ratna Santi

    2015-07-01

    Full Text Available Keberadaan logam Zn dalam jumlah tertentu di tailing pasca tambang akan berdampak pada rendahnya populasi mikroba tanah dan menghambat pertumbuhan tanaman. Aplikasi pemanfaatan fungi indigenus dari lahan tercemar merupakan salah satu usaha dalam memperbaiki sifat tanah untuk pertumbuhan tanaman. Penelitian ini bertujuan untuk mengetahui pengaruh inokulasi fungi dan toksisitas Zn terhadap pertumbuhan jagung pada fase VE-V9 di media tailing steril.  Fungi diisolasi dari tailing lahan pasca penambangan timah di Sungailiat  Bangka. Tiga isolat dari 15 isolat dipilih untuk pengujian pengaruh inokulasi fungi terhadap pertumbuhan jagung. Percobaan menggunakan Rancangan Acak Kelompok(RAK dua faktor dengan perlakuan jenis fungi dan konsentrasi Zn. Isolat yang digunakan toleran terhadap Zn pada konsentrasi 0-25 ppm dan mampu menghasilkan fitohormon. Hasil percobaan di rumah kaca menunjukkan bahwa inokulasi fungi nyata memperbaiki pertumbuhan jagung, dibandingkan tanpa inokulan. Serapan tertinggi ditunjukkan oleh isolat R 7J1, namun pertumbuhan jagung terbaik didapatkan dari inokulasi isolat B 2J1. The existence of Zn metal in a certain amount in the post tin mine tailings will result in low soil microbial populations and inhibit plant growth. Application of indigenous fungi utilization on contaminated land is one effort to improve soil properties for plant growth.This study aimed to determine the effect of inoculation of fungi and toxicity of zinc on the growth of corn in the phase of VE-V9 in sterile tailings medium. Fungi were isolated from post tin mining tailings tin lands in Bangka Sungailiat. Three isolates from 15 isolates were selected to test the effect of fungal inoculation on the growth of corn. Experiment used a Randomized Complete Block Design (RCBD two factors with fungi and Zn concentration treatments.Tolerant isolates used were at a concentration of 0-25 ppm Zn and capable to produce phytohormones. Result of experiment in greenhouse

  20. Enrichment of boron 10

    International Nuclear Information System (INIS)

    Coutinho, C.M.M.; Rodrigues Filho, J.S.R.; Umeda, K.; Echternacht, M.V.

    1990-01-01

    A isotopic separation pilot plant with five ion exchange columns interconnected in series were designed and built in the IEN. The columns are charged with a strong anionic resin in its alkaline form. The boric acid solution is introduced in the separation columns until it reaches a absorbing zone length which is sufficient to obtain the desired boron-10 isotopic concentration. The boric acid absorbing zone movement is provided by the injection of a diluted hydrochloric acid solution, which replace the boric acid throughout the columns. The absorbing zone equilibrium length is proportional to its total length. The enriched boron-10 and the depleted boron are located in the final boundary and in the initial position of the absorbing zones, respectively. (author)

  1. Thermoelectric properties of boron and boron phosphide CVD wafers

    Energy Technology Data Exchange (ETDEWEB)

    Kumashiro, Y.; Yokoyama, T.; Sato, A.; Ando, Y. [Yokohama National Univ. (Japan)

    1997-10-01

    Electrical and thermal conductivities and thermoelectric power of p-type boron and n-type boron phosphide wafers with amorphous and polycrystalline structures were measured up to high temperatures. The electrical conductivity of amorphous boron wafers is compatible to that of polycrystals at high temperatures and obeys Mott`s T{sup -{1/4}} rule. The thermoelectric power of polycrystalline boron decreases with increasing temperature, while that of amorphous boron is almost constant in a wide temperature range. The weak temperature dependence of the thermal conductivity of BP polycrystalline wafers reflects phonon scattering by grain boundaries. Thermal conductivity of an amorphous boron wafer is almost constant in a wide temperature range, showing a characteristic of a glass. The figure of merit of polycrystalline BP wafers is 10{sup -7}/K at high temperatures while that of amorphous boron is 10{sup -5}/K.

  2. DINAMIKA EKOLOGI LAUT SULAWESI (WPP 716 SEBAGAI DAYA DUKUNG TERHADAP PERIKANAN MALALUGIS (Decapterus macarellus Cuvier, 1833

    Directory of Open Access Journals (Sweden)

    Puji Rahmadi

    2015-06-01

    Full Text Available Ikan Malalugis adalah ikan pelagis kecil yang merupakan hasil tangkapan utama nelayan di perairan Laut Sulawesi. Pada tahun 2012 dilaporkan bahwa perikanan pelagis kecil menjadi salah satu hasil perikanan yang penting, dan hasil tangkapan yang dominan dari perikanan pelagis kecil tersebut adalah ikan malalugis biru (Decapterus macarellus. Jenis ikan malalugis memiliki sifat bermigrasi dan membentuk gerombolan kecil yang mana sangat dipengaruhi oleh kondisi lingkungannya. Tipe arus pasut di Teluk Manado (Laut Sulawesi merupakan arus pasut bolak balik (reversing current. Banyaknya arus yang begitu aktif merupakan salah satu faktor yang mendukung habitat ikan malalugis. Diduga kekhasan sifat distribusi arus di daerah laut Sulawesi ini yang membuat kelimpahan ikan malalugis relatif tinggi di perairan Sulawesi Utara dibandingkan dengan daerah perairan lainnya di Indonesia. Kelimpahan ikan malalugis yang tinggi mendorong ikan ini menjadi komoditas penting dalam sektor perikanan di Laut Sulawesi. Meski demikian pada tahun 2012 dilaporkan bahwa tingkat produksi ikan malalugis mengalami penurunan. Hal ini diduga karena terlalu tingginya tingkat eksploitasi atau diakibatkan oleh adanya perubahan dalam kondisi ekosistem ikan tersebut di Laut Sulawesi. Oleh karena itu studi ini dilakukan untuk mengkaji tingkat daya dukung lingkungan terhadap keberlangsungan sumberdaya perikanan malalugis di wilayah perairan Laut Sulawesi. Malalugis fish is a small pelagic fish that constitute the main catch of fishermen in the waters of North Celebes Sea. In 2012 it was reported that small pelagic fishery became one of the important fishery products and it was dominated by the species of Malalugis (Decapterus macarellus. This species has a typical behavior which was highly mobility and forming fish schooling and strongly influenced by environmental conditions. The type of tidal current in North Sulawesi coast is reversing current. This kind of current

  3. TINJAUAN PSIKOLOGIS TERHADAP HUKUMAN MATI

    Directory of Open Access Journals (Sweden)

    Pujiastuti Handayani

    2014-10-01

    Full Text Available Abstrak Tindak pidana mutilasi merupakan kejahatan terhadap tubuh dalam bentuk pemotongan bagian-bagian tubuh tertentu dari korban. Persoalan terkait tindak pidana mutilasi yaitu penerapan sanksi pidana terhadap pelaku berupa hukuman mati. Tulisan ini akan menguraikan penerapan hukuman mati terhadap tindak pidana mutilasi yang ditinjau dari perspektif psikologis, hak asasi manusia, maupun agama. Abstract The criminal act of mutilation is a crime against the body in the form of cutting certain body parts of the victim. One of the issues related to mutilation as a crime is the application of death penalty to the perpetrators. This paper describes the application of the death penalty for the perpetrator of the crime of mutilation from a psychological, human rights, and religious perspectives.

  4. PERAN REVEGETASI TERHADAP RESTORASI TANAH PADA LAHAN REHABILITASI TAMBANG BATUBARA DI DAERAH TROPIKA (The Role of Revegetation on the Soil Restoration in Rehabilitation Areas of Tropical Coal Mining

    Directory of Open Access Journals (Sweden)

    Cahyono Agus

    2014-05-01

    Full Text Available ABSTRAK Pertambangan batubara terbuka menyebabkan degradasi lahan, sehingga perlu upaya rehabilitasi lahan melalui program revegetasi. Penelitian dilakukan di areal PT. Berau Coal  pada site Binungan, Lati dan Sambarata, Kabupaten Berau, Kalimantan Timur, Indonesia. Penelitian menggunakan rancangan acak lengkap ber-blok dengan umur revegetasi sebagai perlakuan, tiga kali ulangan dan tiga site sebagai blok. Pemilihan lokasi menggunakan metode purposif sampling yaitu pengambilan sampel yang didasarkan pada pertimbangan pada umur pengolahan lahan revegetasi, meliputi S1 : area hutan sebelum ditambang (rona awal, S2 : revegetasi awal, umur tanaman  5 tahun. Pengambilan sampel tanah pada  kedalaman 0–20 dan 20-40 cm pada setiap perlakuan di ketiga lokasi, selanjutnya dianalisis sifat fisik dan kimianya. Tanah Typic Hapludult pada lahan hutan sebelum ditambang batubara secara terbuka (S1,  rona awal mempunyai kadar C-organik (1,87 %, N-total (0,14 %, P-tersedia (31,40 ppm, K-tertukar (0,11 me/100g, pH (3,98, KTK (10,72 me/100g dan kejenuhan basa (17 %. Penambangan terbuka batubara telah menyebabkan lapisan bawah dan  permukaan tanah menjadi terbongkar dan terjadi penurunan kualitas tanah yang sangat drastis. Penimbunan lahan dengan media tanah permukaan sebelumnya, telah cukup  mampu memperbaiki sifat-sifat tanah tertambang namun belum sesuai sebagai media pertumbuhan, serta sangat rentan terhadap degradasi lahan lebih lanjut. Revegetasi menggunakan tanaman pionir, cepat tumbuh dan adaptif seperti Sengon, Akasia, Sungkai, Melina, Angsana, Jarak serta Legume Cover Crop (LCC pada area bekas tambang  batubara memberikan pengaruh yang  nyata terhadap peningkatan kandungan C-organik, N-total dan  pH tanah. Revegetasi menggunakan spesies cepat tumbuh setelah berumur 5 tahun telah mengembalikan bahkan memperbaiki sifat kimia tanah dibanding dengan kondisi pada hutan tropika basah sebelum dilakukan penambangan terbuka.   ABSTRACT Open coal mining

  5. ANALISIS FRAKSI-FRAKSI KURVA ISOTERMI SORPSI AIR DARI TEPUNG ROSELA DAN PENGARUHNYA TERHADAP SIFAT-SIFAT MUTU PRODUK [Analysis of Moisture Sorption Isotherm Fraction of Roselle Powder and Its Effect on Products the Quality Characteristics

    Directory of Open Access Journals (Sweden)

    Rita Hayati

    2013-06-01

    Full Text Available The purpose of this study was to determine the fractions of moisture sorption isotherm curve and the critical water content of roselle powder and its effect on the product quality during storage. Roselle flowers were harvested at 25 days after flowering and sun dried (30ºC for 3 days. The result showed that the moisture sorption isotherm curve of the roselle powder was sigmoid. The critical transition points among the three fractions of the bound water in the roselle flour were first at moisture content (Mp and water activity (ap of 7.97% dry basis (db and 0.23 respectively, and second at Ms 21.1% db water content and water activity (as of 0.65%. Roselle powder samples were stored for 20 days at three relative humidity (RH fractions represented by RH 22% (moisture content at 7.2% db, RH 57 % (20.5% db and 84 % (54.2% db. The samples stored in the first fraction was stable in texture, colour and appearance, while the sample in the secondary bound water fraction (21.1% db, changed in colour into darker red. The sample stored in the tertiary bound water fraction (54.2% db changed into brown colour with musty smell and mouldy after 15 days.

  6. Pengaruh Atmosferik terhadap Kepuasan dan Niatan Perilaku Konsumen

    Directory of Open Access Journals (Sweden)

    Edi Purwanto

    2016-12-01

      Penelitian ini dilakukan untuk mengetahui peran atmosferik di restoran “X,” sebuah restoran Jepang yang berada di berbagai area di Jakarta. Penelitian ini menganalisis (1 pengaruh atmosferik terhadap kualitas layanan; (2 pengaruh atmosferik terhadap kualitas makanan; (3 pengaruh atmosferik terhadap nilai yang dirasakan; (4 pengaruh kualitas layanan terhadap kepuasan pelanggan; (5 pengaruh nilai yang dirasakan terhadap kepuasan pelanggan; (6 pengaruh kualitas makanan terhadap kepuasan pelanggan; (7 pengaruh kualitas layanan terhadao niatan perilaku konsumen; (8 pengaruh kepuasan pelanggan terhadap niatan perilaku konsumen; (9 pengaruh kualitas makanan terhadap niatan perilaku konsumen; (10 pengaruh tidak langsung atmosferik terhadap kepuasan pelanggan; dan (11 pengaruh tidak langsung atmosferik terhadap niatan perilaku konsumen. Desain penelitian ini adalah kuantitatif. Kami membagikan kuesioner kepada para pelanggan restoran “X” di Jakarta dan kuesioner yang kembali berjumlah 283, yang mana ada 54 kuesioner yang tidak dapat digunakan, sehingga penelitian ini menggunakan 229 sampel. Setiap indikator terbukti sahih dan setiap variabel terbukti handal. Penelitian ini menemukan bahwa pengaruh atmosferik terhadap kualitas layanan, kualitas makanan, dan nilai yang dirakan secara parsial positif dan signifikan. Pengaruh nilai yang dirasakan dan kualitas makanan terhadap kepuasan pelanggan secara parsial juga positif dan signifikan. Pengaruh kepuasan pelanggan terhadap niatan perilaku konsumen positif dan signifikan. Pengaruh kualitas makanan terhadap niatan perilaku konsumen juga ditemukan positif dan signifikan. Pengaruh tidak langsung atmosferik terhadap kepuasan pelanggan dan niatan perilaku konsumen juga positif dan signifikan. Namun, karena di restoran yang diteliti konsumen mereka melayani diri sendiri, maka kualitas layanan tidak berpengaruh signifikan terhadap kepuasan pelanggan dan niatan perilaku konsumen.

  7. Pengaruh Ekstraksi Zat Warna Alam dan Fiksasi Terhadap Ketahanan Luntur Warna pada Kain Batik Katun

    Directory of Open Access Journals (Sweden)

    Titiek Pujilestari

    2016-04-01

    Full Text Available ABSTRAKKain katun merupakan jenis kain yang terbuat dari serat kapas, mempunyai sifat mudah menyerap  bahan alami maupun kimia dan banyak digunakan untuk bahan media batik. Telah dilakukan penelitian ekstraksi pada lima jenis zat warna alam dengan menggunakan air. Variasi antara bahan pembawa zat warna dengan air adalah 1 : 6 dan 1 : 8. Fiksasi dilakukan dengan menggunakan kapur, tunjung, tawas, campuran kapur dengan tetes dan tanpa fiksasi. Penelitian dilakukan untuk mengetahui pengaruh penambahan air pada ekstraksi dan bahan fiksasi terhadap ketahanan luntur warna pada kain. Hasil penelitian menunjukan bahwa ekstraksi zat warna alam dari daun indigo, daun mangga, kulit kayu nangka, kulit buah manggis dan biji buah kesumba dengan menggunakan air sebanyak 6 dan 8 bagian, memberikan hasil yang tidak jauh berbeda. Jenis zat warna alam dan bahan fiksasi yang diaplikasikan untuk pembatikan kain katun yang memberikan ketahanan luntur baik adalah: kulit buah manggis dengan fiksasi kapur, tawas dan tanpa fiksasi, biji buah kesumba/bixa dengan fiksasi tunjung dan tawas, kulit kayu nangka dengan fiksasi tunjung, daun mangga dengan fiksasi tawas. Daun indigo mempunyai ketahanan luntur warna yang baik sampai sangat baik terhadap pencucian, tetapi kurang baik sampai baik terhadap sinar terang hari. Penggunaan fiksasi campuran kapur dan tetes tebu menghasilkan ketahanan luntur warna pencucian dan sinar terang hari lebih rendah dibanding fiksasi dengan kapur. Ketahanan luntur dari kelima zat warna alam terhadap pencucian lebih baik dibanding ketahanan luntur terhadap sinar terang hari. Kata kunci: zat warna alam, ekstraksi, fiksasi, katunABSTRACTThe cotton fabric is a type of fabric made from cotton fiber, its easily absorbed material both natural and chemical, and widely used as a material for batik.Research extraction of five types of natural dyes made with a variety of colour materials carrier and the use of water is 1:6 and 1:8. Fixation of color on

  8. KARAKTERISTIK SIFAT FISIK KAYU JABON(Anthocephalus cadamba Miq PADA ARAH LONGITUDINAL DAN RADIAL

    Directory of Open Access Journals (Sweden)

    Ary Widiyanto

    2017-06-01

    Full Text Available This study aims to investigate the characteristics of the physical properties of jabon (Anthocephalus cadambaMiq. wood and its variations in the stem longitudinaland radial direction. A total of 3samplesof jabontrees were taken from private forest in Talagawangi Village, Pakenjeng sub-District, Garut District, West Java Province. Speciments of physical properties were taken at 3 different heightsof the longitudinal direction(bottom, midle and top of trunkas well as 3 differentradialdirections (near pith, middle and near barkof the jabontrunk. The observation focused on the physical properties in three position of both longitudinal and radial orientation. The parameters observed were green wood moisture content(GMC, air-driedmoisture content (ADMC, specific gravity on green wood moisture volume (SGG, and specific gravity on air-dried moisture volume (SGAD. Result showed that the average of GMC and ADMC of jabon wood were 118,43% and 15.36% respectively, while SGG and SGAD are 0.33 and 0.37 respectively.The specific gravity (both SGG and SGAD of jabon wood was significantly differencein bothlongitudinal and radial direction; while the ADMC and FMC were not significantly difference for longitudinal direction but significantly difference for radial direction. On radial direction, the GMC decreased from the pith to midle and increased near ther bark; while the ADMC regularly decreased from the pith to bark. The specific gravity value on the longitudinaldirection consistently increases from the bottom of the trunk to the top. On radial direction, the specific gravity value consistently increases from the pith to near the bark. Penelitian ini bertujuan untuk mengetahui karakteristik sifat fisik kayu jabon (Anthocepalus cadamba Miq dan variasinya pada arah longitudinal dan radial batang.Sebanyak 3 pohon, masing-masing diambil sampel 3 titik pada arah longitudinal dan radial batang kayu jabondiambil dari hutan rakyat Desa Talagawangi, Kecamatan Pakenjeng

  9. Pengaruh Penambahan Aditif Bi2O3 Terhadap Karakteristik Barium Heksaferit Hasil Sintesis dengan Metode Sol-Gel

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    Siti Wardiyati Siswoyo

    2017-11-01

    Full Text Available Telah dilakukan sintesis barium heksaferit (BaFe12O19 secara sol-gel menggunakan prekursor barium nitrat [Ba(NO32], besi nitrat [Fe(NO33] dan asam sitrat (C6H8O7 Penelitian ini bertujuan untuk mendapatkan BaFe12O19 fasa tunggal berukuran nano dengan koersivitas magnetik tinggi. Untuk mencapai tujuan tersebut dilakukan penambahan aditif Bi2O3 dengan berbagai variasi persentase berat terhadap BaFe12O19 dari 0,5% sampai dengan 2%. Karakterisasi BaFe12O19 hasil sintesis dilakukan dengan  menggunakan alat X-ray diffraction (XRD untuk analisis  fasa, Fourier Transmission Infra Red (FTIR untuk mengetahui tipe ikatan yang terjadi, Scanning Electron Microscope dan Energy Dispersive X-ray Spectroscopy (SEM/EDS untuk analisis struktur dan persentase atom, dan Vibrating Sample Magnetometer VSM untuk mengetahui sifat magnetik yaitu koersivitas dan saturasi magnetik. Dari hasil percobaan diperoleh BaFe12O19 fasa tunggal dengan ukuran partikel sekitar 105 nm - 130 nm, saturasi magnetik 57,86 emu/g dan koersivitas magnetik sebesar 0,38 T. 

  10. Persepsi Mahasiswa Terhadap Plagiat

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    Elok Putri Nimasari

    2017-12-01

    Full Text Available Ketidakjujuran dalam bidang akademik seperti plagiat, banyak terjadi di lingkungan akademisi. Menjiplak hasil tulisan dan ide tanpa mencantumkan referensi kerap ditemukan dalam banyak kasus, tidak hanya di dalam karya ilmiah tetapi juga pada tugas-tugas perkuliahan. Seiring dengan berkembangnya teknologi melalui telepon pintar dan juga jaringan internet yang semakin mudah untuk mengakses informasi, membuat plagiat di lingkungan akademisi juga semakin meningkat. Dengan atau tanpa sadar mahasiswa menjiplak sebuah karya atau ide pemikiran, adalah tanggung jawab sebuah institusi perguruan tinggi untuk memperkenalkan pada mahasiswanya apa itu plagiat, jenis-jenis plagiat, akibat dari perilaku plagiat, bagaimana cara-cara untuk menghindari plagiat dan bagaimana penerapan sangsi untuk yang melakukan plagiat secara konsisten. Penelitian ini bertujuan untuk mengidentifikasi persepsi dan perilaku mahasiswa terhadap plagiat, mengidentifikasi tipe-tipe plagiat, dan menganalisis solusi yang bisa dilakukan untuk mengurangi perilaku plagiat.Pendekatan kualitatif dan kuantitatif dengan menggunakan kuesioner, wawancara, observasi, dan analisis dokumen di aplikasikan dalam studi ini.Obyek dalam penelitian ini merupakan mahasiswa Universitas Muhammadiyah Ponorogo. Sampel populasi menggunakan purposive random sampling.

  11. A New Boron Analysis Method

    Energy Technology Data Exchange (ETDEWEB)

    Weitman, J; Daaverhoeg, N; Farvolden, S

    1970-07-01

    In connection with fast neutron (n, {alpha}) cross section measurements a novel boron analysis method has been developed. The boron concentration is inferred from the mass spectrometrically determined number of helium atoms produced in the thermal and epithermal B-10 (n, {alpha}) reaction. The relation between helium amount and boron concentration is given, including corrections for self shielding effects and background levels. Direct and diffusion losses of helium are calculated and losses due to gettering, adsorption and HF-ionization in the release stage are discussed. A series of boron determinations is described and the results are compared with those obtained by other methods, showing excellent agreement. The lower limit of boron concentration which can be measured varies with type of sample. In e.g. steel, concentrations below 10-5 % boron in samples of 0.1-1 gram may be determined.

  12. SIFAT FISIKA MEKANIKA PAPAN PARTIKEL DARI PELEPAH NIPAH (Nyfa fruticans Wurmb DAN SERBUK GERGAJI DENGAN PEREKAT UREA FORMALDEHYDE Physical-mechanical Properties of Particle Boards Made From Nipah (Nyfa fruticans wurmb and Sawdust with Urea Formaldehyde Adhesive

    Directory of Open Access Journals (Sweden)

    Noor Mirad Sari

    2016-08-01

    Full Text Available Penelitian bertujuan untuk mengetahui sifat fisika dan mekanika papan buatan dari pelepah nipah dan serbuk gergaji yang meliputi kerapatan, kadar air, penyerapan air, pengembangan tebal, keteguhan lengkung dan keteguhan patah. Penelitian dan pengujian ini dilaksanakan di Laboratorium Teknologi Hasil Hutan untuk pembuatan partikel, dan pengujian sifat fisik mekanik dilakukan di Balai Riset dan Standarisasi Industri Banjarbaru. Pengujian sifat fisik yang meliputi pengujian kadar air, kerapatan, penyerapan air dan pengembangan tebal, pengujian sifat mekanik meliputi pengujian MOE dan MOR. Hasil penelitian menunjukkan Kadar air dari papan partikel hampir semuanya masuk standar SNI  kecuali pada perlakuan A yaitu sebesar  16,74 %, semua perlakuan untuk kerapatan telah memenuhi standar SNI yaitu  0,40 kg/cm2 – 0,90 kg/cm2, penyerapan air yang masuk standar SNI adalah perlakuan D yaitu 28,88 % dan 23,42 %, kisaran nilai perlakuan pengembangan tebal  3,82 % - 12,29 % telah memenuhi standar SNI, semua sifat mekanika MOE tidak ada yang memenuhi standar SNI kecuali pada MOR untuk perlakuan D yaitu sebesar 85,43 kg/cm2. Kata kunci:  Sifat Fisik  Mekanik, Pelepah Nipah dan Serbuk Gergaji, Urea Formaldehide

  13. Pengujian Kemampuan Daya Samak Cube Black dan Limbah Cair Gambir Terhadap Mutu Kulit Tersamak

    Directory of Open Access Journals (Sweden)

    Gustri Yeni

    2016-06-01

    Cube black dan limbah cair pengolahan gambir. Konsentrasi bahan penyamak yang digunakan dalam perlakuan adalah 2%, 3% dan 4% dengan berat kulit yang akan disamak sebanyak 1 kg. Kulit tersamak diuji terhadap derajat penyamakan (DP dan uji fisik meliputi kekuatan tarik, kemuluran dan kekuatan sobek. Pada perlakuan yang sama dibandingkan dengan penyamak krom. Hasil uji kulit tersamak menunjukkan makin tinggi konsentrasi bahan penyamak makin tinggi nilai DP dan sifat fisik kulit makin baik. Kulit tersamak dari kambing menggunakan Cube black gambir pada konsentrasi 4% menghasilkan nilai DP mendekati sama dengan penyamak krom (38,45% dan 36,60%. Untuk kulit ikan tuna tersamak menghasilkan nilai DP 39,57% dan 31,35%. Bahan penyamak gambir menghasilkan nilai kekuatan tarik, kekuatan sobek dan kemuluran lebih tinggi dari penyamak krom. Nilai kekuatan tarik kulit kambing 730,37 kg/cm2, ikan tuna 353,33 kg/cm2 diperoleh dari penyamak limbah cair. Nilai kekuatan sobek kulit kambing adalah 353,33 kg/cm2, kulit ikan tuna 29,96 kg/ cm2 dan nilai kemuluran kulit ikan tuna 202,0% diperoleh dari Cube black gambir. Hasil penelitian menunjukkan bahan penyamak gambir memiliki sifat penyamak yang dapat menggantikan penyamak krom.

  14. PENGARUH CUSTOMER RELATIONSHIP MARKETING TERHADAP LOYALITAS KONSUMEN

    OpenAIRE

    Verawati, .

    2017-01-01

    Penelitian ini bertujuan untuk menganalisis pengaruh customer relationship marketing terhadap loyalitas konsumen. Data yang digunakan dalam penelitian ini adalah data primer. Data primer diperoleh dari hasil jawaban kuesioner nasabah Bank yang disebar di Yogyakarta. Alat analisis yang digunaka n untuk menganalisis pengaruh customer relationship marketing terhadap loyalitas konsumen di bank Yogyakarta adalah analisis regresi berganda metode backward. Kesimpulan yang diperoleh dalam penelitian ...

  15. PENGARUH PENGALAMAN AUDIT TERHADAP PENINGKATAN KEAHLIAN AUDITOR

    OpenAIRE

    AMIR, YUNITA

    2014-01-01

    2014 Pengaruh Pengalaman Audit terhadap Peningkatan Keahlian Auditor Effect of Audit Experience to Increase The Expertise of Auditor Yunita Amir Mediaty Kartini Penelitian ini bertujuan untuk mengukur pengaruh pengalaman audit terhadap peningkatan keahlian auditor. Penelitian ini dilakukan dengan pengisian kuesioner oleh auditor di Makassar. Variabel independen dari penelitian ini adalah lamanya masa kerja dan banya...

  16. POLA RESISTENSI KUMAN PENYEBAB DIARE TERHADAP ANTIBIOTIKA

    Directory of Open Access Journals (Sweden)

    Yusri Dianne Jurnalis

    2009-05-01

    Full Text Available AbstrakResistensi kuman terhadap antibiotika sangat dipengaruhi oleh intensitas pemaparan antibiotika. Penggunaan antibiotika yang tidak rasional pada penyakit diare cenderung akan meningkatkan resistensi kuman yang semula sensitif. Perkembangan resistensi kuman terhadap antibiotika perlu dipantau agar dalam pengobatan penyakit diare dengan antibiotika dapat dilakukan pemilihan obat yang tepat.Untuk mengetahui pola resistensi kuman terhadap antibiotika pada pasien diare yang dirawat di bangsal IKA RS Dr. M. Djamil Padang dari Januari-Desember 2008.Data penelitian diperoleh dari catatan medik pasien diare yang dirawat di bangsal IKA dan dilakukan kultur dan sensitivitas dari sampel feses. Dilakukan uji resistensi terhadap kuman yang terdeteksi dengan antibiotika Ampisilin (Amp, Tetrasiklin (TE, Sulfametoxazole-Trimetoprim (STX, sebagai antibiotik ang paling banyak digunakan pada pasien diare.Dari hasil uji kultur dan sensitivitas pada 173 sampel feses didapatkan 3 jenis kuman yang terbanyak yaitu E.Coli sebanyak 92 (51.4%, Klebsiela sp 30 (16.8%, dan kuman Enterobacter sp 28 (15.6%. Resistensi kuman E.Coli terhadap antibotika AMP sebesar 53.3%, terhadap TE 67.4% dan terhadap STX 87%. Resistensi kuman Klebsiela sp terhadap antibiotika AMP sebesar 46%, terhadap TE 40% dan terhadap STX 73.3%. Dan resistensi kuman Enterobacter sp terhadap antibotika AMP sebesar 64.3%, terhadap TE 75% dan terhadap STX 82,1%.Kuman penyebab diare menunjukkan resistensi yang tinggi terhadap Sulfametoxazole-Trimetoprim (STX.Kata kunci. resistensi, antibiotika, diareAbstractMicroorganisme resistance against antibiotic is highly influenced by intensity of antibiotics exposure. Irrational use of antibiotics in diarrhea tends to increase resistance of previously sensitive microorganism. Monitoring in antibiotics development resistance is required to achieve appropriate diarrhea therapy.ARTIKEL PENELITIAN42To assess microorganism resistance pattern against antibiotics in

  17. EFEKTIVITAS MASSAGE LUMBAL DAN BREAST MASSAGE TERHADAP KONTRAKSI UTERUS PADA IBU BERSALIN KALA I

    Directory of Open Access Journals (Sweden)

    Ipang Suparti

    2017-09-01

    Full Text Available Penyulit dalam persalinan antara lain adanya kelainan presentasi dan posisi, distosia karena kelainan alat kandungan, distosia karena kelainan janin, dan distosia karena kelainan his (Manuaba, 2010. Distosia karena kelainan his dapat terjadi karena sifat his yang berubah-ubah, tidak adanya koordinasi dan sinkronisasi kontraksi dan bagian–bagiannya sehingga kontraksi tidak efisien dalam mengadakan pembukaan. Kelainan his juga dapat terjadi karena his yang tidak adekuat untuk melakukan pembukaan serviks atau mendorong anak keluar. His yang tidak adekuat ini disebut dengan inersia uteri (Leveno K, 2010 dalam Atun Raudotul dkk. Upaya non farmakologis merupakan suatu upaya untuk membantu timbulnya kontraksi tanpa bantuan obat atau bahan sintetik lainnya. Dimana upaya tersebut dengan melakukan pijatan pada bagian tubuh agar merangsang pengeluaran oksitosin secara lebih alami dan aktif sehingga diharapkan tidak menimbulkan efek yang berbahaya bagi ibu maupun janin. Sampel pada penelitian ini yaitu ibu bersalin kala I di BPM Siti Sugiharti pada periode Maret-April 2016. Teknik pengambilan sampel pada penelitian ini menggunakan purposive sampling. Jenis penelitian ini menggunakan metode penelitian kuantitatif dengan desain penelitian quasi experimental yaitu desain yang mempunyai kelompok kontrol, tetapi tidak dapat berfungsi sepenuhnya untuk mengontrol variabel-variabel luar yang mempengaruhi pelaksanaan eksperimen (Sugiyono, 2013. tindakan massage lumbal yang dilakukan pada ibu bersalin kala I terjadi peningkatan kontraksi uterus sebanyak 20 (95,24% responden. Sedangkan pada tindakan breast massage terjadi peningkatan kontraksi uterus sebanyak 19 (90,48% responden. Penelitian ini dapat disimpulkan bahwa tindakan massage lumbal yang dilakukan pada ibu bersalin kala I lebih berhasil dibandingkan dengan breast massage. Terdapat perbedaan kontraksi uterus sebelum dan setelah dilakukan Breast Massage terhadap peningkatan kontraksi uterus pada ibu bersalin

  18. ANALISIS PENGARUH EVA DAN MVA TERHADAP RETURN SAHAM PADA INDUSTRI PROPERTI DI BURSA EFEK INDONESIA PERIODE 2007-2012

    Directory of Open Access Journals (Sweden)

    Ryan Pahlawan

    2015-04-01

    Full Text Available Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui dan menganalisis: (1 pengaruh Economic Value Added (EVA terhadap return saham (2 pengaruh Market Value Added (MVA terhadap return saham (3 pengaruh Economic Value Added (EVA dan Market Value Added (MVA terhadap return saham antara variabel kinerja keuangan industri properti di Bursa Efek Indonesia pada periode 2007-2012. Kegunaan teoritis adalah untuk memberikan kontribusi tentang pengetahuan manajemen keuangan, yang dapat digunakan sebagai acuan untuk penelitian berikutnya kinerja keuangan terutama tentang industri properti di Bursa Efek Indonesia. Kegunaan praktis adalah untuk mengetahui pengaruh tingkat Economic Value Added (EVA dan Market Value Added (MVA terhadap kinerja keuangan untuk kontribusi memberi kepada manajemen properti umum dalam mengelola variabel kinerja industri properti Bursa Efek Indonesia.Penelitian ini menggunakan data sekunder yang dikumpulkan dari data Bursa Efek Indonesia, dan Departemen Riset menurut sifat laporan keuangan pada periode 2007-2012. Sampel adalah 54 variabel dan dianalisis dengan regresi berganda metode statistik linier. Total nilai determinasi adalah 0,368, artinya ini adalah 36,8% informasi dalam data dapat dijelaskan oleh model dan 63,2% di bawah variabel lain dan error. Kesimpulan dari penelitian ini adalah: (1 Variabel Economic Value Added (EVA berpengaruh positif terhadap return saham; (2 Variabel Market Value Added (MVA memiliki pengaruh negatif terhadap Return Saham; Mengacu pada kesimpulan penelitian diatas maka disarankan adalah: (1 Dioptimalkan Economic Value Added (EVA untuk mencapai pendapatan dan keuntungan dari return saham (2 Mengelola Variabel Market Value Added (MVA pada kondisi baik untuk menjaga stabilitas keuangan dan mendapatkan dipercaya dari investor Bursa Efek Indonesia (3 Fokus ke Manajemen Risiko, Jasa, perusahaan Visi & Misi, dan Active keterampilan dan pengetahuan karyawan perusahaan yang lebih tinggi untuk

  19. PENGUKURAN SIFAT POLARISASI BERBAGAI MINYAK NABATI MENGGUNAKAN LAMPU IR DAN LASER HE-NE

    Directory of Open Access Journals (Sweden)

    U Kaltsum

    2017-03-01

    Full Text Available Penelitian ini bertujuan untuk menguji sifat polarisasi berbagai minyak nabati (minyak sawit, minyak kedelai, minyak zaitun, VCO, minyak curah, dan jelantah dengan variasi keadaan baru dan kadaluwarsa, menggunakan lampu IR dan laser He-Ne. Pengujian dilakukan dengan menempatkan minyak nabati diantara polarisator dan analisator. Hasil penelitian pada kedua sumber cahaya menunjukkan pola yang hampir sama. Minyak zaitun dan VCO memiliki perubahan sudut polarisasi alami kecil, sedangkan minyak sawit, kedelai, jelantah, dan curah memiliki perubahan sudut polarisasi alami besar. Besarnya perubahan sudut polarisasi minyak kadaluwarsa lebih besar dibanding minyak baru. Perubahan sudut polarisasi sebanding dengan jumlah radikal bebas (ALB, peroksida dan molekul asimetri (asam lemak jenuh, molekul rantai panjang. Meskipun pola yang dihasilkan oleh kedua sumber cahaya sama, namun lampu IR memberikan nilai perubahan sudut polarisasi yang lebih tinggi dari laser He-Ne. Hal ini dimungkinkan karena daya lampu IR lebih besar dari He-Ne, sehingga energi yang dihasilkan lampu IR lebih tinggi dan perubahan sudut polarisasinya lebih besar. This research based on previous research that using IR lamp (250 watt and He-Ne laser (1 mW on a mixture of palm oil and animal oil. Both of light source were used again to measure polarization properties of various vegetable oils (palm oil, soybean oil, olive oil, VCO, rainfall oil and used cooking oil with a variety of new and expired. The tools used were a set polarization, IR lamp, He-Ne laser, and power supply. The experiment was done by placing vegetable oil between the polarizer and analyzers. The result showed both of light sources had similar pattern; polarization changes of olive oil and the VCO were small, while polarization changes of palm oil, soybean oil, used cooking oil, and rainfall were high. Polarization change of expired oil was higher than new oil. The value of polarization change was proportional to free

  20. Boron supplementation in broiler diets

    Directory of Open Access Journals (Sweden)

    EJ Fassani

    2004-12-01

    Full Text Available Boron supplementation in broiler feed is not a routine practice. However, some reports suggest a positive effect of boron on performance. This study assessed the effects of boron supplementation on broiler performance. Diets were based on maize and soybean meal, using boric acid P.A. as boron source. Six supplementation levels (0, 30, 60, 90, 120 and 150 ppm were evaluated using 1,440 one-day old males housed at a density of 30 chickens in each of 48 experimental plots of 3m². A completely randomized block design was used with 8 replicates. Feed intake, weight gain and feed conversion were assessed in the periods from 1 to 7 days, 1 to 21 days and 1 to 42 days of age, and viability was evaluated for the total 42-day rearing period. No performance variable was affected by boron supplementation (p>0.05 in the period from 1 to 7 days. The regression analysis indicated an ideal level of 37.4 ppm of boron for weight gain from 1 to 21 days (p0.05, although feed intake was reduced linearly with increased boron levels (p0.05. Ash and calcium percentages in the tibias of broilers and viability in the total rearing period were not affected by boron supplementation (p>0.05.

  1. PENERAPAN PULSED ELECTRIC FIELD PADA PASTEURISASI SARI BUAH APEL VARIETAS ANA: KAJIAN KARAKTERISTIK NILAI GIZI, SIFAT FISIK, SIFAT KIMIAWI DAN MIKROBIA TOTAL Application of Pulsed Electric Field in Pasteurization of Apple Juice of Ana Cultivar : Study on

    Directory of Open Access Journals (Sweden)

    La Choviya Hawa

    2012-05-01

    Full Text Available Apple juice, extracted from apple of ana cultivar , was pasteurized using a pulsed electric field (PEF method. The aimof this research was to analyze the changes on nutritional, physical and chemical properties and total microbes from apple juice after pasteurization. The research was conducted from July until Oktober 2009 located in Malang. The PEF treatment was carried out using treatment time variation for 10, 20, 30, 40, 50 and 60 seconds. Several parameters of vitamin A and C, water content, density, pH, total soluable solid and total microbes were observed. The results showed that PEF treatment did not significantly change nutritional, physical and chemical properties and total microbes after pasteurization with PEF in compared with no treatment pasteurization. The highest degradation was found in treatment time for 60 seconds, i.e. 93.53 %. ABSTRAK Sari buah apel, yang diekstrak dari apel varietas ana, dipasteurisasi dengan metode pulsed electric field (PEF. Tujuanpenelitian ini adalah untuk mengetahui perubahan karakteristik nilai gizi, sifat fisik, kimiawi dan total mikrobia sari buah apel sesudah dipasteurisasi. Penelitian dilaksanakan bulan Juli sampai dengan Oktober 2009 di Malang. Penelitian ini menggunakan variasi waktu pengolahan 10, 20, 30, 40, 50 dan 60 detik. Parameter pengamatan yaitu vitamin A dan C, kadar air, berat jenis, pH, total padatan terlarut dan total mikrobia. Hasil penelitian menunjukkan bahwa nilai gizi, sifat fisik dan kimiawi dari sari apel  tidak mengalami perubahan signifikan dibandingkan sari apel tanpa perlakuan PEF. Penurunan total mikrobia terbesar pada waktu perlakuan 60 detik dengan efektivitas pembunuhan sebesar 93,53%.

  2. ANALISIS TERHADAP PELAKSANAAN EUTHANASIA PASIF

    Directory of Open Access Journals (Sweden)

    Umi Enggarsasi

    1997-07-01

    Full Text Available Dalam KUHP tidak satu pasal pun yang menjelaskan batasan atau pengertian euthanasia. Namun demikian, pengenaan terhadap euthanasia dianalogikan dengan delik-delik yang tercantum dalam pasal 338, 340, 344 KUHP. Dengan dasar itulah maka pelaksanaan euthanasia dilarang. Larangan euthanasia pasif tidak pernah efektif karena kematian sebagai akibat ketidakmampuan ilmu dan teknologi kedokteran, dipandang sebagai kematian alamiah, sedangkan terhadap kematian alamiah tentu saja tidak ditahan-tahan atau dilarang hukum pidana maupun kode etik kedokteran. Hukum pidana dan kode etik kedokteran, tidak mewajibkan dokter untuk mengobati pasien di Iuar batas kemampuan ilmu dan teknologi kedokteran. berdasarkan penerapan karakteristik delik omisionis terbukti bahwa, larangan euthanasia pasif tidak memenuhi kriteria untuk diterapkan sebagai perbuatan pidana. Dalam hal terjadinya euthanasia pasif, walaupun dokter melakukan perbuatan positif, secara logika, kematian pasien tidak dapat dihindari. Dengan demikian sulit untuk dibuktikan adanya hubungan kausal antara akibat yang dilarang timbulnya dengan kelakuan negatif dokter.

  3. SIKAP KONSUMEN TERHADAP BERAS ORGANIK

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    Northa Idaman

    2014-04-01

    Full Text Available ABSTRACTThe purpose of this study were (1 to analyze the product attributes which considered necessary by the consumers of organic rice in Sukabumi Region, (2 to analyze the contribution of attitude toward behavior, subjective norms, and perceived behavioural control toward the intention to buy organic rice in Sukabumi Region, and (3 to formulate the managerial implication to improve the intention to buy organic rice in Kabupaten Sukabumi. The analyzed data on the 151 respondents were collected from four sub-districts in Sukabumi using convenience-sampling method. While analysis used were descriptive, cochran, and structural  equation  modelling. The result show that there were three attributes which were necessitated by the consumers in Sukabumi Region in buying organic rice, and there were big contributions from two constructs in forming the intention to buy organic rice in Sukabumi Region. Keywords: organic rice, consumer attittude, theory of planned behavior, structural equation modelling (SEMABSTRAKTujuan penelitian ini adalah (1 menganalisis atribut-atribut produk yang dipentingkan oleh konsumen terhadap beras organik di Kabupaten Sukabumi. (2 menganalisis kontribusi sikap terhadap perilaku pembelian beras organik (attitude toward behavior, norma subjektif (subjective norms, dan kontrol perilaku (perceived behavioral control terhadap minat (intention membeli beras organik di Kabupaten Sukabumi, (3 merumuskan implikasi manajerial yang dapat diambil dari hasil penelitian untuk meningkatkan minat membeli beras organik di Kabupaten Sukabumi. Analisis data dilakukan terhadap 151 responden yang dikumpulkan dari empat kecamatan di Kabupaten Sukabumi menggunakan metode convenience-sampling. Analisis yang digunakan adalah deskriptif, Cochran dan structural  equation  modelling.  Hasil penelitian menunjukkan bahwa terdapat tiga atribut yang dipentingkan oleh konsumen di Kabupaten Sukabumi dalam membeli beras organik, serta kontribusi yang besar

  4. Boron atom reactions

    International Nuclear Information System (INIS)

    Estes, R.; Tabacco, M.B.; Digiuseppe, T.G.; Davidovits, P.

    1982-01-01

    The reaction rates of atomic boron with various epoxides have been measured in a flow tube apparatus. The bimolecular rate constants, in units of cm 3 molecule -1 s -1 , are: 1,2-epoxypropane (8.6 x 10 -11 ), 1,2-epoxybutane (8.8 x 10 -11 ), 1,2,3,4-diepoxybutane (5.5 x 10 -11 ), 1-chloro-2,3-epoxypropane (5.7 x 10 -11 ), and 1,2-epoxy-3,3,3-trichloropropane (1.5 x 10 -11 ). (orig.)

  5. Separation process for boron isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Rockwood, S D

    1975-06-12

    The method according to the invention is characterized by the steps of preparing a gaseous mixture of BCl/sub 3/ containing the isotopes of boron and oxygen as the extractor, irradiating that mixture in the tube of the separator device by means of P- or R-lines of a CO/sub 2/ laser for exciting the molecules containing a given isotope of boron, simultaneously irradiating the mixture with UV for photodissociating the excited BCl/sub 3/ molecules and separating BCl/sub 3/ from the reaction products of photodissociation and from oxygen. Such method is suitable for preparing boron used in nuclear reactors.

  6. Lattice dynamics of α boron and of boron carbide

    International Nuclear Information System (INIS)

    Vast, N.

    1999-01-01

    The atomic structure and the lattice dynamics of α boron and of B 4 C boron carbide have been studied by Density Functional Theory (D.F.T.) and Density Functional Perturbation Theory (D.F.P.T.). The bulk moduli of the unit-cell and of the icosahedron have been investigated, and the equation of state at zero temperature has been determined. In α boron, Raman diffusion and infrared absorption have been studied under pressure, and the theoretical and experimental Grueneisen coefficients have been compared. In boron carbide, inspection of the theoretical and experimental vibrational spectra has led to the determination of the atomic structure of B 4 C. Finally, the effects of isotopic disorder have been modeled by an exact method beyond the mean-field approximation, and the effects onto the Raman lines has been investigated. The method has been applied to isotopic alloys of diamond and germanium. (author)

  7. Nothing Boring About Boron

    Science.gov (United States)

    Pizzorno, Lara

    2015-01-01

    The trace mineral boron is a micronutrient with diverse and vitally important roles in metabolism that render it necessary for plant, animal, and human health, and as recent research suggests, possibly for the evolution of life on Earth. As the current article shows, boron has been proven to be an important trace mineral because it (1) is essential for the growth and maintenance of bone; (2) greatly improves wound healing; (3) beneficially impacts the body’s use of estrogen, testosterone, and vitamin D; (4) boosts magnesium absorption; (5) reduces levels of inflammatory biomarkers, such as high-sensitivity C-reactive protein (hs-CRP) and tumor necrosis factor α (TNF-α); (6) raises levels of antioxidant enzymes, such as superoxide dismutase (SOD), catalase, and glutathione peroxidase; (7) protects against pesticide-induced oxidative stress and heavy-metal toxicity; (8) improves the brains electrical activity, cognitive performance, and short-term memory for elders; (9) influences the formation and activity of key biomolecules, such as S-adenosyl methionine (SAM-e) and nicotinamide adenine dinucleotide (NAD+); (10) has demonstrated preventive and therapeutic effects in a number of cancers, such as prostate, cervical, and lung cancers, and multiple and non-Hodgkin’s lymphoma; and (11) may help ameliorate the adverse effects of traditional chemotherapeutic agents. In none of the numerous studies conducted to date, however, do boron’s beneficial effects appear at intakes > 3 mg/d. No estimated average requirements (EARs) or dietary reference intakes (DRIs) have been set for boron—only an upper intake level (UL) of 20 mg/d for individuals aged ≥ 18 y. The absence of studies showing harm in conjunction with the substantial number of articles showing benefits support the consideration of boron supplementation of 3 mg/d for any individual who is consuming a diet lacking in fruits and vegetables or who is at risk for or has osteopenia; osteoporosis

  8. Pengaruh Konsentrasi Minyak Kelapa Murni (Virgin Coconut Oil dan Minyak Jarak (Castor Oil terhadap Sifat Fisikokimia dan Organoleptik Sabun Mandi Cair

    Directory of Open Access Journals (Sweden)

    Asri Widyasanti

    2017-04-01

    Full Text Available VCO contains of lauric acid that perform to smooth and to moisturize the skin. Castor oil has ricinoleic acid that serves to protect the skin. Therefore, both of the oil are suitable to be the raw material for liquid soap making. This study aimed were to produce a liquid soap, to determine the exact concentration of VCO and castor oil for liquid soap and to find out the effect of VCO and Castor Oil concentrations to the characteristics of liquid soap. The method used was laboratory experimental method with descriptive analysis. The treatments in this study were A =concentrations of VCO 100 %, B = concentrations of VCO 80 % and castor oil 20 %, C = concentrations of VCO 50 % and castor oil 50 %, D = concentrations of VCO 20 % and castor oil 80 %, and E = concentrations of castor oil 100 %,  from 200 gram soap base. The parameter observed for liquid soap included chemical properties, physical properties of soap, and organoleptic test. The result shows that all treatments complies the requirement SNI 06-4085-1996. The formula of liquid soap with treatment B was revealed as the best product with 0.01 % of total alkali content, pH value of 9.16 , specific gravity 1.06, and total plate count 5colonies/g. This technology process of natural liquid soap production with the VCO and castor oil could be develop and apply in industrial scale.

  9. Pengaruh Konsentrasi Minyak Kelapa Murni (Virgin Coconut Oil) dan Minyak Jarak (Castor Oil) terhadap Sifat Fisikokimia dan Organoleptik Sabun Mandi Cair

    OpenAIRE

    Asri Widyasanti; Shayana Junita; Sarifah Nurjanah

    2017-01-01

    VCO contains of lauric acid that perform to smooth and to moisturize the skin. Castor oil has ricinoleic acid that serves to protect the skin. Therefore, both of the oil are suitable to be the raw material for liquid soap making. This study aimed were to produce a liquid soap, to determine the exact concentration of VCO and castor oil for liquid soap and to find out the effect of VCO and Castor Oil concentrations to the characteristics of liquid soap. The method used was laboratory experiment...

  10. Pengaruh Pemberian Kompos Jerami Dan Pupuk Sp-36 Pada Tanah Sulfat Masam Potensial Terhadap Perubahan Sifat Kimia Serta Pertumbuhan Dan Produksi Padi (Oriza Sativa L.)

    OpenAIRE

    Bhakari, Herlina Eka; Fauzi, Fauzi; Hanum, Hamidah

    2013-01-01

    The objective of this research was to study the effect of rice straw compost and the application ofphosphorus fertilizer of SP-36 on chemical characteristic of acid sulphate soils, rice growth andproduction (Oryza sativa L). This research was conducted in greenhouse agricultural departments,Universities Northen Sumatera, Medan. This study used a randomized block design factorial, with2 factors : factor 1 : rice straw compost treatment (J) wich consist of : J0 = 0 ton ha-1(0 g straw/pot); J1 =...

  11. Pengaruh Pemberian Kompos Jerami Dan Pupuk Sp-36 Pada Tanah Sulfat Masam Potensial Terhadap Perubahan Sifat Kimia Serta Pertumbuhan Dan Produksi Padi (Oryza Sativa L.)

    OpenAIRE

    Bhakari, Herlina Eka

    2013-01-01

    The objective of this research is to study the effect of rice straw compost and the application of phosphorus fertilizer of SP-36 on chemical characteristic of acid sulphate soils, rice growth and production (Oryza sativa L). This study used a randomized block design factorial, with 2 factors : factor 1 : rice straw compost treatment (J) wich consist of : J0 = 0 ton ha-1 (0 g straw/pot) ; J1 = 10 ton ha-1 (40 g straw/pot); J2 = 20 ton ha-1 (80 g straw /pot); J3 = 30 ton ha-1 ...

  12. PENGARUH KONSENTRASI CaCl2 DAN LAMA PERENDAMAN TERHADAP SIFAT ORGANOLEPTIK KERIPIK PISANG MULI (Musa paradisiaca L. DENGAN PENGGORENGAN VAKUM (VACUUM FRYING

    Directory of Open Access Journals (Sweden)

    Fibra Nurainy

    2013-07-01

    Full Text Available The ripe muli banana is very sensitive to high temperatures, therefore this type banana cannot be fried at normal atmosphere pressur. Therefore , a frying process at low temperature and low pressureis needed. The objective of this research was to determine the best CaCl2 concentration, soaking time, and the interaction between  them in producing the best muli banana cracker using vacuum frying. The factorial experiment was arranged  in a complete randomized block design with three replications. The first factor was the CaCl2 (K concentration and the second factor was soaking time (T. The CaCl2 concentration consisted of three levels: 1% (K1, 2% (K2, and 3% (K3. The soaking times were 10 minutes (T1, 20 minutes (T2, and 30 minutes (T3. Weight of each sample processed was 2 kg. The sensory evaluation data homogeneity  and additivity were  tested using Bartlet  and Tuckey tests.  Then the data were analyzed using ANOVA, and further analyzed using honest significant difference with significant level of 5%. The best organoleptic properties of vacuum fried muli banana cracker was found on the treatment of  1% CaCl2 soaked for10 minutes (K1L1 with characteristics of typical banana aroma, yellow brownish color, sweet and a little bit sour taste, no after taste, and crunchy. The overall acceptance was favorable. Keywords: CaCl2, cracker, crunchiness, muli banana, vacuum frying

  13. Evaluasi Sifat Ovisidal dan Nimfasidal Insektisida Buprofezin 100 g/l terhadap Telur dan Nimfa Wereng Coklat, Nilaparvata lugens (Stal. (Hemiptera: Delphacidae

    Directory of Open Access Journals (Sweden)

    BAEHAKI SUHERLAN EFFENDI

    2016-11-01

    Full Text Available Evaluation of ovicidal and nymphcidal properties of buprofezin 100 g/linsecticide to eggs and nymphs of brown planthopper, Nilaparvata lugens(Stal. (Hemiptera: Delphacidae. Research was carried out in screen house ofSukamandi, Indonesian Center for Rice Research (ICRR in the wet season of 2013. Theresearch used randomized block design with 5 doses levels insecticide treatment of buprofezin100 g/l and four replications. The buprofezin treatments were 250, 500, 750, 1000, and 1500ml/ha compared with control without insecticide. The objective of the research to evaluate ofovicidal and nymphcidal of buprofezin to brown planthopper (BPH. The results showed thatthe ovicidal properties of buprofezin 100 g/l with a range doses of treatments to BPH eggsthat application at 5 days after inoculation with eggs remains in the plant tissue were 39,79-94,88%. The raising ovicidal of buprofezin were 74,84-99,5% that applied at 9 days afterinoculation with eggs remains in the plant tissue. In the other hand the ovicidal properties ofbuprofezin decreased dramatically were 20-48% that applied at 5 days after inoculation andthen BPH eggs removed from plant tissue (dissected at 9 days after inoculation. The higherovicidal properties of buprofezin is better in the plant tissue than in the dissected eggs treated,because buprofezin working on eggs in plant tissue as a systemic insecticide. The dissectedBPH eggs of rice treated to show the normal eggs shape and no eggs contracted. Theunhatched eggs of buprofezin treatments were milk white due to insecticide effect, sometranslucent color with a red dot as a fertile eggs or without a red dot as unfertile eggs.Buprofezin was the excellent nymphcidal insecticide with the value of the efficacy to BPHnymphs were very high about 87,44 -100% for a range doses treatments. Buprofezin did notresurgence effect, moreover this insecticides still have ovicidal and nimphcidal properties as abasic to reduce offspring of brown planthopper.

  14. Evaluasi Sifat Ovisidal dan Nimfasidal Insektisida Buprofezin 100 g/l terhadap Telur dan Nimfa Wereng Coklat, Nilaparvata lugens (Stal.) (Hemiptera: Delphacidae)

    OpenAIRE

    BAEHAKI SUHERLAN EFFENDI; EKO HARI ISWANTO; AMIR HAMZAH

    2016-01-01

    Evaluation of ovicidal and nymphcidal properties of buprofezin 100 g/linsecticide to eggs and nymphs of brown planthopper, Nilaparvata lugens(Stal.) (Hemiptera: Delphacidae). Research was carried out in screen house ofSukamandi, Indonesian Center for Rice Research (ICRR) in the wet season of 2013. Theresearch used randomized block design with 5 doses levels insecticide treatment of buprofezin100 g/l and four replications. The buprofezin treatments were 250, 500, 750, 1000, and 1500ml/ha compa...

  15. Pengaruh sistem vulkanisasi konvensional (CV dan semi efisien (SEV terhadap sifat aging dan termal vulkanisat campuran karet alam dan karet butil

    Directory of Open Access Journals (Sweden)

    Arum Yuniari

    2015-12-01

    Full Text Available The purpose of this research was to study the effect of CV and SEV curing systems on aging and thermal properties of natural rubber and butyl rubber blends. The mixing of rubber and rubber chemicals using two roll-mills and the vulcanization process was carried out by the hydraulic press at 160° C and 150 kg/cm2. The research design used two variations; first, the CV curing system (accelerator/sulfur (1.0/2.5 phr and SEV curing system (accelerator/sulfur (2.1/1.5 phr, second, the ratio of natural rubber/butyl: 100/0; 95/5; 90/10; 85/15; 80/20; 75/25; 70/30; 65/35; 60/40 and 55/45 phr. The parameter observed were tensile strength, elongation at break, hardness before and after aging and thermal properties, e.g.TG/DTA and DSC. The results showed that CV curing systems provided tensile, elongation at break properties gave higher quality and better aging properties. TG/DTA analysis of vulcanizates processed with CV curing systems provided slightly better thermal stability than of the SEV curing system.

  16. Beberapa sifat fisika kimia tanah yang berpengaruh terhadap model kecepatan infiltrasi pada tegakan mahoni jabon dan trembesi di Kebun Raya Purwodadi

    Directory of Open Access Journals (Sweden)

    Agung Sri Darmayanti

    2013-03-01

    Full Text Available The research was conducted at the Purwodadi Botanical Gardens in three areas covered by the dominant vegetation Mahoni(Swietenia macrophylla, Jabon (Anthocephalus cadamba and trembesi (Samanea saman in January to May 2012. The purpose of thisstudy was to obtain a model infi ltration rate (cm/h that was infl ued by physical and chemical properties of the soil that exist under thevegetation. Physical and chemicalparameters of soil chemical properties is observed macropore (%, organic matter (%, percentage ofthe fraction silt (%, sand(%, and clay(%, and bulk density (BD (g/cm3. The six factors are thought to differ indirectly because of thespecifi cation and morphology of the dominant plant species shelter. Data infi ltration was collected by using the ring infi ltrometer, whilemacroporosity tested with metylen blue method, the properties of the other physical chemical factortested by laboratory of Departmentof Soil, Brawijaya University. The model derived from the analysis of the regression equation using SPSS software version 17.0. Thestudy produced three different models of infi ltration rate on each plot different, they were Y = - 15,8 + 17,3 X1 - 1,09 X2 + 1,53 X3 +0,001 X4 - 21,3 X6 (Mahoni's plot;Y = - 108 + 53,0 X1 - 0,68 X2 + 5,27 X3 - 0,470 X4 + 59,7 X6 (Jabon's plot; Y = - 20,1 + 17,4X1 - 1,06 X2 + 1,57 X3 + 0,082 X4 - 21,6 X6 (Trembesi's plot. Y= Infi ltration rate (cm/h, X1= macropore (%, X2= organic matter(%, percentage of the fraction silt (% (X3, sand (% (X4, and X6= bulk density (g/cm3. In the equation not found factor X5 (clayfraction helped form a model because of multicollinearity analysis obtained by assuming that the clay fraction still contains a linearrelationship (correlated with other variables.

  17. PENERAPAN PENDEKATAN REALISTIK UNTUK MENINGKATKAN HASIL BELAJAR SISWA KELAS V PADA MATA PELAJARAN MATEMATIKA POKOK BAHASAN SIFAT-SIFAT BANGUN RUANG

    Directory of Open Access Journals (Sweden)

    Mashudi Mashudi

    2016-03-01

    Full Text Available Abstrak. Penelitian ini dilatarbelakangi rendahnya hasil belajar siswa pada ranah kognitif mata pelajaran matematika. Hal ini ditunjukkan dengan skor rata-rata ujian dan pretest yang tidak memenuhi nilai Kriteria Ketuntasan Minimal (KKM. Rendahnya hasil belajar siswa tidak terlepas dari minimnya keterlibatan siswa selama proses pembelajaran. Penelitian ini difokuskan pada upaya peningkatan prestasi belajar siswa pada ranah kognitif melalui penerapan pendekatan Realistic Mathematic Education (RME. Tujuan penelitian ini adalah untuk mendapatkan gambaran mengenai peningkatan prestasi belajar siswa pada ranah kognitif sebagai hasil penerapan RME. Selain itu, penelitian ini juga bertujuan untuk mendapatkan gambaran tentang sikap siswa terhadap pembelajaran matematika realistik. Pada penelitian ini, metode penelitian yang digunakan adalah Penelitian Tindakan Kelas (PTK. Subjek dalam penelitian ini adalah siswa-siswi kelas V SDN Kiarapandak 01 Kec. Sukajaya Kab. Bogor yang berjumlah 25 orang. Pengumpulan data dilakukan melalui angket, jurnal siswa, tes, dan lembar observasi. Berdasarkan hasil penelitian, diperoleh bahwa hasil belajar siswa pada ranah kognitif secara umum mengalami peningkatan setelah diterapkannya pendekatan RME. Pada siklus I skor rata-rata gain ternormalisasi pada pretest dan akhir siklus I skor rata-rata siswa termasuk kategori rendah. Sementara pada siklus II skor rata-rata siswa gain ternormalisasi pada siklus I dan akhir siklus II  skor rata-rata siswa termasuk kategori tinggi. Hal ini menunjukkan bahwa hasil belajar siswa pada aspek kognitif mengalami peningkatan setelah diterapkannya pendekatan RME. Kata kunci : pembelajaran matematika realistik, hasil belajar.  Abstract. This research is motivated lack of student learning outcomes in the cognitive domain of mathematics. This is demonstrated by the average score of the test and pretest that do not meet the value of Kriteria Ketuntasan Minimal (KKM. Low student learning

  18. Boronization in TEXTOR

    International Nuclear Information System (INIS)

    Winter, J.; Esser, H.G.; Koenen, L.; Reimer, H.; Seggern, J. v.; Schlueter, J.; Waelbroeck, F.; Wienhold, P.; Veprek, S.

    1989-01-01

    The liner and limiters of TEXTOR have been coated in situ with a boron containing carbon film using a RG discharge in a throughflow of 0.8 He + 0.1 B 2 H 6 + 0.1 CH 4 . The average film thickness was 30-50 nm, the ratio of boron and carbon in the layer was about 1:1 according to Auger Electron Spectroscopy. Subsequent tokamak discharges are characterized by a small fraction of radiated power ( eff lower than 1.2 are derived from conductivity measurements. The most prominent change in the impurity concentration compared to good conditions in a carbonized surrounding is measured for oxygen. The value OVI/anti n e of the OVI intensity normalized to the averaged plasma density anti n e decreases by more than a factor of four. The decrease in the oxygen content manifests itself also as a reduction of the CO and CO 2 partial pressures measured during and after the discharge with a sniffer probe. The carbon levels are reduced by a factor of about two as measured by the normalized intensity CII/anti n e of the CII line and via the ratio of the C fluxes and deuterium fluxed measured at the limiter (CI/D α ). The wall shows a pronounced sorption of hydrogen from the plasma, easing the density control and the establishment of low recycling conditions. The beneficial conditions did not show a significant deterioration during more than 200 discharges, including numerous shots at ICRH power levels >2 MW. (orig.)

  19. TINGKAT KEPUASAN PELANGGAN TERHADAP PELAYANAN DI KFC MAKASSAR TOWN SQUARE

    OpenAIRE

    RAMADHANI, IRMA

    2017-01-01

    2017 Penelitian ini bertujuan untuk mengetahui tingkat kepuasan pelanggan terhadap pelayanan di KFC Makassar Town Square. Penelitian ini dilaksanakan terhadap pelanggan KFC Makassar Town Square yang telah bertransaksi lebih dari satu kali. Penelitian ini merupakan penelitian kuantitatif deskriptif dengan mendeskripsikan atau menggambarkan tentang tingkat kepuasan pelanggan terhadap pelayanan. Jumlah sampel penelitian 83 pelanggan KFC Makassar Town. Analisis data menggunak...

  20. OPINI MAHASISWA TERHADAP PERILAKU SEKS PRANIKAH

    Directory of Open Access Journals (Sweden)

    Mega Ardina

    2017-09-01

    Full Text Available Tingginya angka perilaku seks pranikah berimbas pada bertambahnya jumlah pengidap HIV/AIDS, aborsi, kematian ibu dan bayi, serta permasalahan lainnya. Penelitian ini akan membahas mengenai opini mahasiswa terhadap perilaku seks pranikah di Yogyakarta dan faktor-faktor yang mempengaruhinya. Metode dasar yang digunakan dalam penelitian ini adalah metode deskriptif dengan menggunakan pendekatan mixed methods, dan strategi eksplanatoris sekuensial. Teknik pengumpulan data dilakukan menggunakan kuesioner terhadap 60 mahasiwa di Yogyakarta secara random. Analisis data secara kuantitatif dilakukan dengan menggunakan software SPSS 16.0 dan sebagai pelengkap pembahasan dilakukan analisis secara kualitatif. Hasil penelitian menunjukkan bahwa faktor-faktor yang berpengaruh terhadap opini mahasiswa adalah sikap mahasiswa terhadap perilaku seks pranikah, keluarga, dan media. Dari tiga faktor yang berpengaruh tersebut, yang memiliki pengaruh positif paling tinggi kepada opini mahasiswa adalah keluarga.Kata kunci: Opini, mahasiswa, perilaku seks pranikah

  1. Note on boron toxicity in oats

    Energy Technology Data Exchange (ETDEWEB)

    Langille, W M; Mahoney, J F

    1959-01-01

    Boron was applied at the rate of 35 pounds per acre of borax to a field of oats. With the first noticeable growth there appeared a definite chlorotic condition of the oat seedlings on plots receiving boron treatments. Analysis of chlorotic tissue at 3 weeks after seeding indicated 110 ppm boron, while apparently healthy tissue contained 6.1 ppm boron at the same stage of growth. There was a rapid decline in the boron content of the oat tissue as the crop grew older. At maturity the oat tissue from the boron-treated plots contained an average of 14.15 ppm boron as compared with 4.10 boron from untreated areas. Boron toxicity had no harmful effect so far as yields were concerned, under the conditions of this experiment. 3 references.

  2. Method for producing polycrystalline boron nitride

    International Nuclear Information System (INIS)

    Alexeevskii, V.P.; Bochko, A.V.; Dzhamarov, S.S.; Karpinos, D.M.; Karyuk, G.G.; Kolomiets, I.P.; Kurdyumov, A.V.; Pivovarov, M.S.; Frantsevich, I.N.; Yarosh, V.V.

    1975-01-01

    A mixture containing less than 50 percent of graphite-like boron nitride treated by a shock wave and highly defective wurtzite-like boron nitride obtained by a shock-wave method is compressed and heated at pressure and temperature values corresponding to the region of the phase diagram for boron nitride defined by the graphite-like compact modifications of boron nitride equilibrium line and the cubic wurtzite-like boron nitride equilibrium line. The resulting crystals of boron nitride exhibit a structure of wurtzite-like boron nitride or of both wurtzite-like and cubic boron nitride. The resulting material exhibits higher plasticity as compared with polycrystalline cubic boron nitride. Tools made of this compact polycrystalline material have a longer service life under impact loads in machining hardened steel and chilled iron. (U.S.)

  3. Metal interactions with boron clusters

    International Nuclear Information System (INIS)

    Grimes, R.N.

    1982-01-01

    This book presents information on the following topics: the structural and bonding features of metallaboranes and metallacarboranes; transition-metal derivatives of nido-boranes and some related species; interactions of metal groups with the octahydrotriborate (1-) anion, B 3 H 8 ; metallaboron cage compounds of the main group metals; closo-carborane-metal complexes containing metal-carbon and metal-boron omega-bonds; electrochemistry of metallaboron cage compounds; and boron clusters with transition metal-hydrogen bonds

  4. Boron Fullerenes: A First-Principles Study

    Directory of Open Access Journals (Sweden)

    Gonzalez Szwacki Nevill

    2007-01-01

    Full Text Available AbstractA family of unusually stable boron cages was identified and examined using first-principles local-density functional method. The structure of the fullerenes is similar to that of the B12icosahedron and consists of six crossing double-rings. The energetically most stable fullerene is made up of 180 boron atoms. A connection between the fullerene family and its precursors, boron sheets, is made. We show that the most stable boron sheets are not necessarily precursors of very stable boron cages. Our finding is a step forward in the understanding of the structure of the recently produced boron nanotubes.

  5. PENELITIAN SIFAT FISIS DAN MEKANIS BAJA KARBON RENDAH AKIBAT PENGARUH PROSES PENGARBONAN DARI ARANG KAYU JATI

    Directory of Open Access Journals (Sweden)

    Masyrukan Masyrukan

    2017-01-01

    Full Text Available Pada penelitian ini, proses pengarbonan (carburising yang dilakukan adalah dengan menambahkan kandungan unsur karbon (C ke dalam permukaan baja. Sumber karbon diperoleh dari arang kayu jati yang telah ditumbuk halus. Temperatur yang digunakan selama proses pengarbonan adalah 900°C, dengan variasi waktu penahanannya 2 jam,  4 jam, dan 6 jam. Setelah itu didinginkan dengan air (quench. Pembuatan benda uji dilakukan untuk mendapatkan sampel dan supaya memudahkan dalam pelaksanaan penelitian.  Pengujian yang dilakukan adalah pengujian struktur mikro, pengujian kekerasan dan pengujian impact.Pengujian kekerasan yang telah dilakukan terhadap material pengarbonan menghasilkan distribusi kekerasan dari permukaan menuju inti, untuk masing-masing waktu penahanan yang berbeda. Untuk waktu penahanan 2 jam mulai HVN 257,5 Kg/mm²  sampai 205,3 Kg/mm² menuju inti ; 4 jam mulai HVN 273,1 Kg/mm² sampai 204,4 Kg/mm² menuju inti ; 6 jam mulai HVN 274,6 Kg/mm²  sampai 204,4 Kg/mm² menuju inti.Hasil pengamatan foto struktur mikro melalui microscope olympus photomicrographic system dihasilkan foto struktur mikro untuk raw material dan carburising sama terdapat ferit dan perlit,  untuk yang dikarburising struktur mikronya,  yaitu ferit  dan perlit.  Semakin lama proses karburising,  semakin banyak pula kandungan perlitnya yang mengakibatkan semakin tingginya tingkat kekerasan. Hasil pengujian impak menunjukkan rata-rata harga impak untuk spesimen raw material = 0,350 J/mm2, waktu penahanan 2 jam = 1,013 J/mm2 , spesimen waktu penahanan 4 jam = 0,600 J/mm2, spesimen waktu penahanan 6 jam = 1,590 J/mm2.

  6. Adsorption of boron from boron-containing wastewaters by ion exchange in a continuous reactor

    International Nuclear Information System (INIS)

    Yilmaz, A. Erdem; Boncukcuoglu, Recep; Yilmaz, M. Tolga; Kocakerim, M. Muhtar

    2005-01-01

    In this study, boron removal from boron-containing wastewaters prepared synthetically was investigated. The experiments in which Amberlite IRA 743, boron specific resin was used were carried out in a column reactor. The bed volume of resin, boron concentration, flow rate and temperature were selected as experimental parameters. The experimental results showed that percent of boron removal increased with increasing amount of resin and with decreasing boron concentration in the solution. Boron removal decreased with increasing of flow rate and the effect of temperature on the percent of total boron removal increased the boron removal rate. As a result, it was seen that about 99% of boron in the wastewater could be removed at optimum conditions

  7. Lattice vibrations in α-boron

    International Nuclear Information System (INIS)

    Richter, W.

    1976-01-01

    α-rhombohedral boron is the simplest boron modification, with only 12 atoms per unit cell. The boron atoms are arranged in B 12 icosahedra, which are centered at the lattice points of a primitive rhombohedral lattice. The icosahedra are slightly deformed, as the five-fold symmetry of the ideal icosahedron is incompatible with any crystal structure. The lattice dynamics of α-boron are discussed in terms of the model developed by Weber and Thorpe. (Auth.)

  8. New Icosahedral Boron Carbide Semiconductors

    Science.gov (United States)

    Echeverria Mora, Elena Maria

    Novel semiconductor boron carbide films and boron carbide films doped with aromatic compounds have been investigated and characterized. Most of these semiconductors were formed by plasma enhanced chemical vapor deposition. The aromatic compound additives used, in this thesis, were pyridine (Py), aniline, and diaminobenzene (DAB). As one of the key parameters for semiconducting device functionality is the metal contact and, therefore, the chemical interactions or band bending that may occur at the metal/semiconductor interface, X-ray photoemission spectroscopy has been used to investigate the interaction of gold (Au) with these novel boron carbide-based semiconductors. Both n- and p-type films have been tested and pure boron carbide devices are compared to those containing aromatic compounds. The results show that boron carbide seems to behave differently from other semiconductors, opening a way for new analysis and approaches in device's functionality. By studying the electrical and optical properties of these films, it has been found that samples containing the aromatic compound exhibit an improvement in the electron-hole separation and charge extraction, as well as a decrease in the band gap. The hole carrier lifetimes for each sample were extracted from the capacitance-voltage, C(V), and current-voltage, I(V), curves. Additionally, devices, with boron carbide with the addition of pyridine, exhibited better collection of neutron capture generated pulses at ZERO applied bias, compared to the pure boron carbide samples. This is consistent with the longer carrier lifetimes estimated for these films. The I-V curves, as a function of external magnetic field, of the pure boron carbide films and films containing DAB demonstrate that significant room temperature negative magneto-resistance (> 100% for pure samples, and > 50% for samples containing DAB) is possible in the resulting dielectric thin films. Inclusion of DAB is not essential for significant negative magneto

  9. Boron steel. I Part. Preparation

    International Nuclear Information System (INIS)

    Jaraiz Franco, E.; Esteban Hernandez, J. A.

    1960-01-01

    With the advent of the first nuclear reactors arise the need for control rods and shielding duties for some types of radiations. One of the materials used for this purpose has been the high boron steel. This paper describes the melting and casting procedures employed for the production, at laboratory scale, of steels with Boron content ranging from 1 to 4 per cent, as well as the metallographic and X-Ray techniques used for the identification of the present phases. The electrolytic technique employed for the isolation of the Fe 2 B phase and its subsequent X-Ray identification has proved to be satisfactory. (Author) 11 refs

  10. Chemical separation of boron isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Palko, A.A.

    1978-06-01

    This is the final report of the research performed at ORNL on the chemical fractionation of boron isotopes between BF/sub 3/ gas and the liquid molecular addition compounds of BF/sub 3/. Thirty compounds were studied, ten of them in detail. Graphs and equations are given for variation of isotopic equilibrium constant, vapor pressure, and BF/sub 3/ solubility as a function of temperature. Rate of isotopic exchange and melting points were determined. Several of the compounds are likely candidates for use in a gas-liquid countercurrent exchange system for large-scale separation of boron isotopes. 23 figs, 53 tables, 39 references.

  11. Chemical separation of boron isotopes

    International Nuclear Information System (INIS)

    Palko, A.A.

    1978-06-01

    This is the final report of the research performed at ORNL on the chemical fractionation of boron isotopes between BF 3 gas and the liquid molecular addition compounds of BF 3 . Thirty compounds were studied, ten of them in detail. Graphs and equations are given for variation of isotopic equilibrium constant, vapor pressure, and BF 3 solubility as a function of temperature. Rate of isotopic exchange and melting points were determined. Several of the compounds are likely candidates for use in a gas-liquid countercurrent exchange system for large-scale separation of boron isotopes. 23 figs, 53 tables, 39 references

  12. Two-channel neutron boron meter

    International Nuclear Information System (INIS)

    Chen Yongqing; Yin Guowei; Chai Songshan; Deng Zhaoping; Zhou Bin

    1993-09-01

    The two-channel neutron boron meter is a continuous on-line measuring device to measure boron concentration of primary cooling liquid of reactors. The neutron-leakage-compensation method is taken in the measuring mechanism. In the primary measuring configuration, the mini-boron-water annulus and two-channel and central calibration loop are adopted. The calibration ring and constant-temperature of boron-water can be remotely controlled by secondary instruments. With the microcomputer data processing system the boron concentration is automatically measured and calibrated in on-line mode. The meter has many advantages such as high accuracy, fast response, multi-applications, high reliability and convenience

  13. PENGARUH GAYA KEPEMIMPINAN, MOTIVASI DAN DISIPLIN KERJA TERHADAP KINERJA KARYAWAN DENGAN PEMAHAMAN ETIKA KERJA ISLAMI

    Directory of Open Access Journals (Sweden)

    Endah Susetyo Indriyati

    2017-12-01

    Full Text Available Tujuan penelitian ini adalah untuk menguji Pengaruh Gaya Kepemimpinan, Motivasi dan Disiplin Kerja Terhadap Kinerja Karyawan Dengan Pemahaman Terhadap Etika Kerja Islami Sebagai Variabel Moderating Studi Kasus Pada Koperasi Jasa Keuangan Syari’ah (KJKS Baitul Maal wa Tamwil (BMT Beringharjo Yogyakarta. Responden yang digunakan sebanyak 97 karyawan yang bekerja di Kantor Cabang Yogyakarta. Data diolah menggunakan analisis Partial Least Squares (PLS berbasis variance, dengan software SmartPLS 2.0. Hasil penelitian menunjukkan Gaya Kepemimpinan memiliki pengaruh yang signifikan terhadap Pemahaman Karyawan Terhadap Etika Kerja Islami, Motivasi tidak berpengaruh signifikan terhadap Pemahaman Karyawan Terhadap Etika Kerja Islami, Disiplin Kerja tidak berpengaruh signifikan terhadap Pemahaman Karyawan Terhadap Etika Kerja Islami. Sementara Gaya kepemimpinan, motivasi, dan disiplin kerja secara bersama-sama memilki pengaruh yang signifikan terhadap Pemahaman Karyawan Terhadap Etika Kerja Islami. Hasil dari analisis moderating (analisis jalur menunjukkan bahwa Gaya Kepemimpinan berpengaruh positif tidak langsung terhadap kinerja karyawan. Motivasi memiliki pengaruh negatif tidak langsung terhadap kinerja karyawan. Disiplin Kerja memilki pengaruh positif tidak langsung terhadap kinerja karyawan. Pemahaman Karyawan Terhadap Etika Kerja Islami berpengaruh positif tidak langsung terhadap kinerja karyawan. Secara keseluruhan Gaya Kepemimpinan, Motivasi, Disiplin Kerja, dan Pemahaman Karyawan Terhadap Etika Kerja Islami secara bersama-sama berpengaruh positif terhadap kinerja karyawan.

  14. Boron-enhanced diffusion of boron from ultralow-energy boron implantation

    International Nuclear Information System (INIS)

    Agarwal, A.; Eaglesham, D.J.; Gossmann, H.J.; Pelaz, L.; Herner, S.B.; Jacobson, D.C.

    1998-01-01

    The authors have investigated the diffusion enhancement mechanism of BED (boron enhanced diffusion), wherein the boron diffusivity is enhanced three to four times over the equilibrium diffusivity at 1,050 C in the proximity of a silicon layer containing a high boron concentration. It is shown that BED is associated with the formation of a fine-grain polycrystalline silicon boride phase within an initially amorphous Si layer having a high B concentration. For 0.5 keV B + , the threshold implantation dose which leads to BED lies between 3 x 10 14 and of 1 x 10 15 /cm -2 . Formation of the shallowest possible junctions by 0.5 keV B + requires that the implant dose be kept lower than this threshold

  15. Structural characterization of electrodeposited boron

    Indian Academy of Sciences (India)

    Structural characterization of electrodeposited boron was carried out by using transmission electron microscopy and Raman spectroscopy. Electron diffraction and phase contrast imaging were carried out by using transmission electron microscopy. Phase identification was done based on the analysis of electron diffraction ...

  16. Boron isotopes in geothermal systems

    International Nuclear Information System (INIS)

    Aggarwal, J.

    1997-01-01

    Boron is a highly mobile element and during water-rock reactions, boron is leached out of rocks with no apparent fractionation. In geothermal systems where the water recharging the systems are meteoric in origin, the B isotope ratio of the geothermal fluid reflects the B isotope ratio of the rocks. Seawater has a distinctive B isotope ratio and where seawater recharges the geothermal system, the B isotope ratio of the geothermal system reflects the mixing of rock derived B and seawater derived B. Any deviations of the actual B isotope ratio of a mixture reflects subtle differences in the water-rock ratios in the cold downwelling limb of the hydrothermal system. This paper will present data from a variety of different geothermal systems, including New Zealand; Iceland; Yellowston, USA; Ibusuki, Japan to show the range in B isotope ratios in active geothermal systems. Some of these systems show well defined mixing trends between seawater and the host rocks, whilst others show the boron isotope ratios of the host rock only. In geothermal systems containing high amounts of CO 2 boron isotope ratios from a volatile B source can also be inferred. (auth)

  17. Structural characterization of electrodeposited boron

    Indian Academy of Sciences (India)

    high temperature reaction between elemental boron and car- bon to form B4C is .... cible was used as the container for the electrolyte and also acted as an anode. ... chosen as cathode due to its availability, low cost, ease of fabrication and ...

  18. PENGARUH KOMPONEN WORKING CAPITAL TERHADAP PROFITABILITAS PERUSAHAAN

    Directory of Open Access Journals (Sweden)

    Anggita Langgeng Wijaya

    2012-03-01

    Full Text Available Penelitian ini menguji efek komponen modal kerja terhadap profitabilitas  perusahaan manufaktur yang terdaftar di Bursa Efek Indonesia selama periode 2005-2007. Komponen modal kerja yang digunakan dalam penelitian ini meliputi aktiva lancar terhadap rasio aset total, kewajiban lancar terhadap  rasio aset total, rasio lancar, rasio leverage dan uang tunai. Populasi penelitian ini adalah semua perusahaan manufaktur di Bursa Efek Indonesia. Metode pengambilan sampel yang digunakan adalah metode purposif. Dan analisis regresi berganda digunakan untuk uji hipotesisnya. Hasil penelitian menunjukkan bahwa: komponen modal kerja memiliki pengaruh penting pada profitabilitas perusahaan. Kewajiban lancar terhadap rasio aset total, rasio lancar dan leverage berdampak negatif terhadap profitabilitas. Di sisi lain, current aset terhadap aset rasio total dan cash ratio berdampak positif pada profitabilitas. This research tests the effect of working capital’s component to the profitability of manufacturing company listed in Indonesia Stock Exchange over the period of 2005-2007. The working capital’s components used in this research include current asset to total asset ratio, current liabilities to total asset ratio, current ratio, leverage and cash ratio. Population of this research is all of manufacturing company at Indonesia Stock Exchange. Sampling method uses purposive sampling method. Hypothesis test uses multiple regression analysis. The results show that working capital component has significance influence on corporate profitability, current liabilities to total asset ratio, current ratio and leverage have negative impact on profitability. In other side, current asset to total asset ratio and cash ratio have positive impact on profitability.

  19. SIFAT PROOKSIDATIF FORTIFIKAN NaFeEDTA, DENGAN KECAP KEDELAI MANIS SEBAGAI MAKANAN PEMBAWA, DALAM SISTEM BIOLOGIS (TIKUS Oxidative Effect of NaFeEDTA Fortificant in Sweet Soy Sauce as Fortification Vehicle, on Biological System (Rats

    Directory of Open Access Journals (Sweden)

    Sri Naruki Naruki

    2012-05-01

    Full Text Available In vivo study about the effect of NaFeEDTA fortificant in sweet soy sauce on TBARS value of plasma and liver, as well as on histopathologic changes of liver, intestine, and stomach of Sprague Dawley rats was conducted. The oxida- tive properties were determined using hemoglobin depletion-repletion method. During 42 days of repletion periode, iron-depleted rats were fed iron-free diet. NaFeEDTA was ingested in varied dosage, i.e. from 0.175 to 1.4 mg Fe/day for each rat. Sweet soy sauce H O (0.2 mL/day was used as fortification vehicle and H O (0.2 mL/day as a control.2 2FeSO .7H O fortificant (0.35 mg Fe/day, with H O as vehicle was used as reference standard. At the end of the reple-4 2 2tion period, TBARS value of either plasma or liver was analized. The histopathologic changes of liver, intestine, and stomach were also evaluated. The data showed that NaFeEDTA fortificant in sweet soy sauce had no effect on TBARS value of plasma, but it resulted in increased TBARS value of liver. The histopathologic data showed that NaFeEDTA intake up to 0.35 mg Fe/day did not result in histopathologic changes of liver, intestine, and stomach, as well. ABSTRAK Penelitian tentang pengaruh dosis fortifikan NaFeEDTA dalam kecap kedelai manis terhadap angka TBARS plasma dan hati, serta perubahan histopatologik organ hati, usus, dan lambung telah dilakukan pada tikus Sprague Dawley. Evaluasi sifat prooksidatif zat besi dari NaFeEDTA dilakukan dengan metoda deplesi-replesi hemoglobin. Selama peri- ode replesi, tikus yang sebelumnya dibuat anemia, diberi diet basal bebas Fe dan minuman H O. NaFeEDTA diberikan sebagai sumber zat besi, dengan dosis bervariasi, yaitu dari 0,175 sampai dengan 1,40 mg Fe/ekor/hari. Kecap kedelai manis atau H O digunakan sebagai pembawa fortifikan. Fortifikan standar FeSO .7H O (0,35 mg Fe/ekor/hari dalam2 4 2H O digunakan sebagai pembanding. Periode replesi dilakukan selama 42 hari. Pada akhir periode replesi dilakukananalisa angka TBARS

  20. Boron-11 MRI and MRS of intact animals infused with a boron neutron capture agent

    International Nuclear Information System (INIS)

    Kabalka, G.W.; Davis, M.; Bendel, P.

    1988-01-01

    Boron neutron capture therapy (BNCT) depends on the delivery of boron-containing drugs to a targeted lesion. Currently, the verification and quantification of in vivo boron content is a difficult problem. Boron-11 spectroscopy was utilized to confirm the presence of a dimeric sulfhydryl dodecaborane BNCT agent contained in an intact animal. Spectroscopy experiments revealed that the decay time of transverse magnetization of the boron-11 spins was less than 1 ms which precluded the use of a 2DFT imaging protocol. A back-projection protocol was developed and utilized to generate the first boron-11 image of a BNCT agent in the liver of an intact Fisher 344 rat

  1. Friction anisotropy in boronated graphite

    International Nuclear Information System (INIS)

    Kumar, N.; Radhika, R.; Kozakov, A.T.; Pandian, R.; Chakravarty, S.; Ravindran, T.R.; Dash, S.; Tyagi, A.K.

    2015-01-01

    Graphical abstract: - Highlights: • Friction anisotropy in boronated graphite is observed in macroscopic sliding condition. • Low friction coefficient is observed in basal plane and becomes high in prismatic direction. • 3D phase of boronated graphite transformed into 2D structure after friction test. • Chemical activity is high in prismatic plane forming strong bonds between the sliding interfaces. - Abstract: Anisotropic friction behavior in macroscopic scale was observed in boronated graphite. Depending upon sliding speed and normal loads, this value was found to be in the range 0.1–0.35 in the direction of basal plane and becomes high 0.2–0.8 in prismatic face. Grazing-incidence X-ray diffraction analysis shows prominent reflection of (0 0 2) plane at basal and prismatic directions of boronated graphite. However, in both the wear tracks (1 1 0) plane become prominent and this transformation is induced by frictional energy. The structural transformation in wear tracks is supported by micro-Raman analysis which revealed that 3D phase of boronated graphite converted into a disordered 2D lattice structure. Thus, the structural aspect of disorder is similar in both the wear tracks and graphite transfer layers. Therefore, the crystallographic aspect is not adequate to explain anisotropic friction behavior. Results of X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy shows weak signature of oxygen complexes and functional groups in wear track of basal plane while these species dominate in prismatic direction. Abundance of these functional groups in prismatic plane indicates availability of chemically active sites tends to forming strong bonds between the sliding interfaces which eventually increases friction coefficient

  2. Friction anisotropy in boronated graphite

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, N., E-mail: niranjan@igcar.gov.in [Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam (India); Radhika, R. [Crystal Growth Centre, Anna University, Chennai (India); Kozakov, A.T. [Research Institute of Physics, Southern Federal University, Rostov-on-Don (Russian Federation); Pandian, R. [Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam (India); Chakravarty, S. [UGC-DAE CSR, Kalpakkam (India); Ravindran, T.R.; Dash, S.; Tyagi, A.K. [Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam (India)

    2015-01-01

    Graphical abstract: - Highlights: • Friction anisotropy in boronated graphite is observed in macroscopic sliding condition. • Low friction coefficient is observed in basal plane and becomes high in prismatic direction. • 3D phase of boronated graphite transformed into 2D structure after friction test. • Chemical activity is high in prismatic plane forming strong bonds between the sliding interfaces. - Abstract: Anisotropic friction behavior in macroscopic scale was observed in boronated graphite. Depending upon sliding speed and normal loads, this value was found to be in the range 0.1–0.35 in the direction of basal plane and becomes high 0.2–0.8 in prismatic face. Grazing-incidence X-ray diffraction analysis shows prominent reflection of (0 0 2) plane at basal and prismatic directions of boronated graphite. However, in both the wear tracks (1 1 0) plane become prominent and this transformation is induced by frictional energy. The structural transformation in wear tracks is supported by micro-Raman analysis which revealed that 3D phase of boronated graphite converted into a disordered 2D lattice structure. Thus, the structural aspect of disorder is similar in both the wear tracks and graphite transfer layers. Therefore, the crystallographic aspect is not adequate to explain anisotropic friction behavior. Results of X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy shows weak signature of oxygen complexes and functional groups in wear track of basal plane while these species dominate in prismatic direction. Abundance of these functional groups in prismatic plane indicates availability of chemically active sites tends to forming strong bonds between the sliding interfaces which eventually increases friction coefficient.

  3. PENGEMBANGAN KINERJA PERAWAT TERHADAP PENCEGAHAN INFEKSI FLEBITIS DI RUMAH SAKIT

    Directory of Open Access Journals (Sweden)

    Noor Amaliah

    2017-09-01

    Full Text Available Flebitis merupakan masalah serius karena mengancam kesehatan dan keselamatan pasien. Flebitis mempunyai dampak terhadap kualitas pelayanan dan peningkatan pembiayaan pelayanan kesehatan. Kejadian flebitis yang tinggi mencerminkan rendahnya mutu pelayanan keperawatan dalam hal pencegahan dan pengendalian infeksi. Tujuan dari penelitian ini menganalisis pengembangan model kinerja perawat terhadap pencegahan infeksi flebitis di Rumah Sakit Islam Banjarmasin. Penelitian ini menggunakan metode kuantitatif dengan desain Explanatory Research menggunakan pendekatan cross sectional dan Focus Group Discussion. Populasi 69 orang perawat pelaksana. Sampel berjumlah 65 responden. Tekhnik sampling menggunakan purposive sampling. Hasil penelitian ini adalah tidak terdapat pengaruh faktor individu, faktor psikologis dan faktor organisasi terhadap kinerja perawat terhadap pencegahan infeksi flebitis dengan nilai T-Statistik > 1,96 dan p Value < 0,05. Kesimpulan penelitian adalah tidak terdapat pengaruh faktor-faktor yang mempengaruhi kinerja perawat terhadap pencegahan infeksi flebitis. Saran dari penelitian ini diharapkan agar perawat dapat meningkatkan kinerjanya terhadap pencegahan infeksi flebitis melalui sikap, motivasi maupun dukungan dari supervisi.

  4. RELIGIOUSITY COMMITMENT DALAM MEMODERASI HUBUNGAN BRAND AWARENESS TERHADAP NIAT PEMBELIAN

    Directory of Open Access Journals (Sweden)

    Mohammad Fakhruddin Mudzakkir

    2014-09-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui 1. Pengaruh brand awareness terhadap niat pembelian pada toko roti merk Islami, 2. Pengaruh religousity commitment terhadap niat pembelian pada toko roti merk Islami, 3. Peranan religousity commitment sebagai variabel moderator yang dapat memperkuat pengaruh brand awareness terhadap niat pembelian pada toko roti merk Islami. Jenis penelitian adalah survey. Populasinya adalah konsumen yang melakukan  pembelian pada 3 toko roti Merk Islami di Kota/Kabupaten Malang, yaitu Toko Roti Amanah, Toko Roti As Sunnah, dan Toko Roti Madinah. Teknik pengambilan sampelnya adalah accidental sampling. Penelitian ini menggunakan metode analisis Moderated Regression Analysis. Hasil analisis menunjukkan variabel brand awareness  dan religousity commitment berpengaruh positif dan signifikan terhadap niat pembelian. Religousity commitment tidak dapat berperan sebagai variabel moderasi terhadap hubungan brand awareness terhadap niat pembelian merk produk Islam

  5. Pengaruh Service Quality Terhadap Customer Satisfication English First Surabaya Town Square

    OpenAIRE

    Prabowo, Randy Setio

    2017-01-01

    Tujuan dari penelitian ini adalah untuk menganalisa pengaruh service quality terhadap customer satisficationdan mengukur apakah memiliki pengaruh antara service quality terhadap customer satisfication baik secara stimultan maupun parsial.Hasil penelitian menunjukan bahwa service quality berpengaruh terhadap customer satisfication secara stilmultan dan secara parsial menunjukan bahwa variabel reliability dan responsiveness tidak memiliki pengaruh terhadap customer satisfication.

  6. Pengaruh Brand Identity Terhadap Timbulnya Brand Preference Dan Repurchase Intention Pada Merek Toyota

    OpenAIRE

    Halim, Beatrice Clementia

    2014-01-01

    Penelitian ini dilakukan untuk mengetahui pengaruh identitas merk Toyota terhadap timbulnya preferensi merek dan niat pembelian kembali konsumen terhadap merek Toyota. Toyota sebagai penguasa pasar mobil di Indonesia, memiliki keunggulan kompetitif tersendiri dibandingkan dengan pesaingnya. Kepercayaan terhadap merek Toyota juga menimbulkan adanya niat pembelian kembali konsumen terhadap merek tersebut.Teknik analisa yang digunakan dalam penelitian ini adalah kausal asosiatif dengan metode pe...

  7. Analisis Sikap Konsumen terhadap Produk Fashion Lokal dan Impor

    OpenAIRE

    Setiawan, Evelyn

    2014-01-01

    Abstrak: Analisis Sikap Konsumen Terhadap Produk Fashion Lokal dan Impor. Penelitian ini bertujuan untuk menganalisis sikap konsumen terhadap produk fashion lokal dan impor yang akan berpengaruh terhadap keputusan konsumsi. Sampel yang akan digunakan dalam penelitian ini adalah 1.000 mahasiswa dari 10 perguruan tinggi swasta terbesar di Surabaya. Pengambilan data dilakukan dengan metode kuesioner. Hasil pengujian statistik menunjukkan bahwa sebagian besar mahasiswa di Surabaya merasa bangga d...

  8. Pengaruh Customer Perceived Value Terhadap Customer Satisfaction PT. Xyz

    OpenAIRE

    Sucahyo, Martinus Wilman

    2017-01-01

    Penelitian ini membahas tentang Customer Perceived Value terhadap Customer Satisfaction PT. XYZ. Dalam penelitian ini, Customer Perceived Value diukur melalui dimensi Core Product Value, Service Value dan Relationship Value. Masing-masing dimensi ini akan diuji pengaruhnya terhadap Customer Satisfaction, baik secara simultan maupun secara parsial, serta dimensi mana yang paling berpengaruh terhadap Customer Satisfaction. Sampel penelitian berjumlah 100 pelanggan PT. XYZ. Data penelitian diola...

  9. PENGGUNAAN BAHAN PENGISI DALAM PERBAIKAN SIFAT FISIKOKIMIA DAN ORGANOLEPTIK DODOL BUAH MERAH (Pandanus conoideus L SEBAGAI SUMBER β-KAROTEN The Use of Filler on Enhancing Physicochemical and Organoleptic Properties of Redfruit Dodol as A Source of Β-Car

    Directory of Open Access Journals (Sweden)

    Murtiningrum Murtiningrum

    2012-05-01

    Full Text Available The main problem in preparation of redfruit dodol is the soft texture of dodol. In the research, preparation of red fruit dodol was done by adding different flours (wheat, rice and tapioca to the total weight of glutinous flour and redfruit paste, as much as 15 % by weight. The preferences of panelists and physicochemical properties tests were done on the redfruit dodol product. The result indicated that the best formulation was the red fruit dodol with tapioca. The panelist preference scores of colour, flavor, odor and texture of the best dodol formulation were fairly like (5.40, fairly like (5.05, like (6.05 and fairly like (5.70 respectively. The physical properties of dodol including hardness, sticky and elasticity level were 951.43 gf, 216.68 gf and 0.35 % respectively. The dodol contained moisture 37.86 %, total solid62.14 with water availibility (a 0.83 and β-carotene 1.02 ppm. ABSTRAK Permasalahan utama dalam pembuatan dodol buah merah, yaitu teksturnya lembek dan lunak. Pada penelitian ini dilakukan penambahan jenis tepung yang berbeda, yaitu tepung terigu, beras dan tapioka sebanyak 15 % (b/b dari berat tepung ketan dan pasta buah merah. Dodol yang dihasilkan dilakukan pengamatan sifat fisikokimia dan ting- kat penerimaan panelis. Hasil penelitian menunjukkan bahwa dodol formula terbaik berdasarkan sifat organoleptik dan fisikokimia adalah dodol dengan penambahan tapioka. Dodol tersebut memiliki sifat organoleptik dengan skor kesukaan warna agak suka (5,40, rasa agak suka (5,05, aroma suka (6,05 dan tekstur agak suka (5,70, sifat fisik kekerasan dan kelengketan masing-masing 951,43 dan 216,68 gf, serta kekenyalan 0,35 %,  juga memiliki sifat kimiadengan mengandung air dan total padatan masing-masing 37,86 % dan 62,14 % dengan tingkat ketersediaan air (a 0,83 dan kandungan β-karoten 1,02 ppm.

  10. Analisa Pengaruh Leadership Style terhadap Firm Performance melalui Learning Organization dan Employee Satisfaction (Studi Kasus pada Perusahaan Sektor Non-manufaktur di Surabaya)

    OpenAIRE

    Kristanti, Florentina

    2014-01-01

    Penelitian ini bertujuan untuk mengetahui pengaruh langsung yang signifikan dari leadership style terhadap learning organization, leadership style terhadap employee satisfaction, learning organization terhadap firm performance, employee satisfaction terhadap firm performance, learning organization terhadap employee satisfaction, dan leadership style terhadap firm performance pada Perusahaan non-manufaktur di Surabaya. Penelitian ini berbentuk penelitian kuantitatif, dimana data diperoleh mela...

  11. Persepsi Konsumen Terhadap Green Marketing Starbucks Surabaya

    OpenAIRE

    Gunawan, Melisa; Reinaldo, Evan; Aprilia, Adriana; Hariyanto, Agung

    2014-01-01

    Penelitian ini dilakukan untuk mengetahui persepsi konsumen terhadap Green Marketing Starbucks Surabaya dengan menggunakan pendekatan deskriptif kuantitatif dengan menyebarkan kuesioner yang dibagikan kepada 105 responden. Hasil penelitian menunjukkan bahwa Green Marketing cukup diketahui oleh konsumen Starbucks melalui variabel-variabel seperti produk, harga, tempat dan promosi yang dilakukan oleh Starbucks. Variabel yang paling dominan di mata konsumen Starbucks adalah variabel produk, seda...

  12. ANALISIS MODEL KEPUASAN TERHADAP PEMBELIAN ULANG

    Directory of Open Access Journals (Sweden)

    Naili Farida

    2014-09-01

    Full Text Available Tujuan penelitian ini yaitu untuk menguji pengaruh brand equity, nilai pelanggan dan lifestyle yang dimediasi kepuasan konsumen terhadap pembelian ulang produk gadget di Kota Semarang. Responden dalam penelitian ini adalah seluruh konsumen yang telah melakukan pembelian produk gadget merek Samsung, sebanyak 120 orang. Teknik sampling yang digunakan yaitu purposive sampling. Teknik analisis yang digunakan yaitu Partial Least Square (PLS. Hasil penelitian menunjukkan bahwa terdapat pengaruh brand equity terhadap kepuasan, namun dalam konteks lifestyle dan nilai pelanggan tidak ada pengaruh terhadap kepuasan. Sedangkan kepuasan menunjukkan adanya pengaruh terhadap pembelian ulang. Diharapkan dari hasil penelitian ini mampu meningkatkan pembelian ulang melalui brand equity, lifestyle dan nilai pelanggan dalam konteks kepuasan. The objective of the research was to test the influence of brand equity, customer value and lifestyle which were mediated by consumer satisfaction toward re-purchasing of gadget products in Semarang. The respondents of the study were all consumers who have purchased Samsung gadget products. It was a purposive sampling study with 120 respondents. The data were analyzed by Partial Least Square (PLS. The result of the study showed that there was an influence of brand equity toward satisfaction, but in the lifestyle context and customer value did not give any influence toward satisfaction. Whereas; the satisfaction gave influence toward re-purchase. It is expected that this study can increase the repurchasethrough brand equity, lifestyle and customer values in the satisfaction context.

  13. Analisis Dampak Servant Leadership Terhadap Competitive Advantage

    OpenAIRE

    Oktavia, Pek Nike

    2014-01-01

    Penelitian ini bertujuan untuk mengetahui apakah terdapat dampak antara Servant Leadership terhadap Competitve Advantage, Employee Empowerment dan Organizational Learning. Variabel Servant Leadership diukur dari lima indikator, yaitu altruistic calling, emotional healing, wisdom, persuasive mapping, dan organizational stewardship. Variabel Competitive Advantage diukur dari lima indikator, yaitu price/cost, quality, delivery dependability, time to market, dan product innovation. Variabel Emplo...

  14. Helium diffusion in irradiated boron carbide

    International Nuclear Information System (INIS)

    Hollenberg, G.W.

    1981-03-01

    Boron carbide has been internationally adopted as the neutron absorber material in the control and safety rods of large fast breeder reactors. Its relatively large neutron capture cross section at high neutron energies provides sufficient reactivity worth with a minimum of core space. In addition, the commercial availability of boron carbide makes it attractive from a fabrication standpoint. Instrumented irradiation experiments in EBR-II have provided continuous helium release data on boron carbide at a variety of operating temperatures. Although some microstructural and compositional variations were examined in these experiments most of the boron carbide was prototypic of that used in the Fast Flux Test Facility. The density of the boron carbide pellets was approximately 92% of theoretical. The boron carbide pellets were approximately 1.0 cm in diameter and possessed average grain sizes that varied from 8 to 30 μm. Pellet centerline temperatures were continually measured during the irradiation experiments

  15. Persepsi Masyarakat terhadap Dampak Penambangan Batu Akik (Studi di Kecamatan Panga Kabupaten Aceh Jaya)

    OpenAIRE

    Jamaril, Jamaril; Usman, Saiful; Amirullah, Amirullah

    2016-01-01

    Penelitian yang berjudul “Persepsi Masyarakat Terhadap Dampak Penambangan Batu Akik (Studi di Kecamatan Panga Kabupaten Aceh Jaya)” ini membahas tentang persepsi masyarakat Kecamatan Panga Kabupaten Aceh Jaya terhadap dampak penambangan batu akik terhadap lingkungan serta dampak penambangan batu akik terhadap perekonomian dan lingkungan. Penelitian ini bertujuan: (1) untuk mengetahui persepsi masyarakat Kecamatan Panga Kabupaten Aceh Jaya terhadap dampak penambangan batu akik, dan (2) untuk m...

  16. Primary system boron dilution analysis

    International Nuclear Information System (INIS)

    Crump, R.J.; Naretto, C.J.; Borgen, R.A.; Rockhold, H.C.

    1978-01-01

    The results are presented for an analysis conducted to determine the potential paths through which nonborated water or water with insufficient boron concentration might enter the LOFT primary coolant piping system or reactor vessel to cause dilution of the borated primary coolant water. No attempt was made in the course of this analysis to identify possible design modifications nor to suggest changes in administrative procedures or controls

  17. Boron removal from geothermal waters by electrocoagulation

    Energy Technology Data Exchange (ETDEWEB)

    Yilmaz, A. Erdem [Atatuerk University, Faculty of Engineering, Department of Environmental Engineering., 25240 Erzurum (Turkey)], E-mail: aerdemy@atauni.edu.tr; Boncukcuoglu, Recep [Atatuerk University, Faculty of Engineering, Department of Environmental Engineering., 25240 Erzurum (Turkey); Kocakerim, M. Muhtar [Atatuerk University, Faculty of Engineering, Department of Chemical Engineering, 25240 Erzurum (Turkey); Yilmaz, M. Tolga; Paluluoglu, Cihan [Atatuerk University, Faculty of Engineering, Department of Environmental Engineering., 25240 Erzurum (Turkey)

    2008-05-01

    Most of the geothermal waters in Turkey contain extremely high concentration of boron when they are used for irrigation. The use of geothermal waters for irrigation can results in excess amount deposition of boron in soil. On the other hand, a minimal boron concentration is required for irrigational waters. In this study, electrocoagulation (EC) was selected as a treatment process for the removal of boron from thermal waters obtained from Ilica-Erzurum in Turkey. Current density (CD), pH of solution and temperature of solution were selected as operational parameters. The results showed that boron removal efficiency increased from pH 4.0 to 8.0 and decreased at pH 10.0. Although boron removal efficiency was highest at pH 8.0, energy consumption was very high at this pH value compared to other pH intervals. Boron removal efficiency reached to 95% with increasing current density from 1.5 to 6.0 mA/cm{sup 2}, but energy consumption was also increased in this interval. At higher temperatures of solution, such as 313 and 333 K, boron removal efficiency increased. At optimum conditions, boron removal efficiency in geothermal water reached up to 95%.

  18. Boron removal from geothermal waters by electrocoagulation

    International Nuclear Information System (INIS)

    Yilmaz, A. Erdem; Boncukcuoglu, Recep; Kocakerim, M. Muhtar; Yilmaz, M. Tolga; Paluluoglu, Cihan

    2008-01-01

    Most of the geothermal waters in Turkey contain extremely high concentration of boron when they are used for irrigation. The use of geothermal waters for irrigation can results in excess amount deposition of boron in soil. On the other hand, a minimal boron concentration is required for irrigational waters. In this study, electrocoagulation (EC) was selected as a treatment process for the removal of boron from thermal waters obtained from Ilica-Erzurum in Turkey. Current density (CD), pH of solution and temperature of solution were selected as operational parameters. The results showed that boron removal efficiency increased from pH 4.0 to 8.0 and decreased at pH 10.0. Although boron removal efficiency was highest at pH 8.0, energy consumption was very high at this pH value compared to other pH intervals. Boron removal efficiency reached to 95% with increasing current density from 1.5 to 6.0 mA/cm 2 , but energy consumption was also increased in this interval. At higher temperatures of solution, such as 313 and 333 K, boron removal efficiency increased. At optimum conditions, boron removal efficiency in geothermal water reached up to 95%

  19. Removal of boron (B) from waste liquors.

    Science.gov (United States)

    Jiang, J Q; Xu, Y; Simon, J; Quill, K; Shettle, K

    2006-01-01

    This paper explores the use of electrocoagulation to remove boron from waste effluent in comparison with alum coagulation. In treating model test wastes, greater boron removals were achieved with electrocoagulation at low doses than conventional alum coagulation when reaction was undertaken for the same conditions (pH 8.5, and initial boron concentration was 500 mg/L). Al electrocoagulation can achieve good boron removal performance (68.3%) at a dose of 2.1 (as molar ratio of Al:B, and for current density of 62.1 A/m2), while alum coagulation can only achieve the maximum boron removal of 56% at a dose of 2.4. Also, Al electrocoagulation can remove 15-20% more boron than alum coagulation for the same dose compared in the treatment of both model test wastes and industry effluent. The estimation of running costs shows that to achieve 75% boron removal from industry waste effluent, i.e. removing 150 g of boron from 1 m3 of effluent, electrocoagulation was 6.2 times cheaper than alum coagulation. The economic advantage of electrocoagulation in the treatment of boron-containing waste effluent is thus significant.

  20. Penelitian sifat sifat fisika sol plastik

    Directory of Open Access Journals (Sweden)

    Susilowati

    1986-12-01

    Full Text Available The physical properties of plastic soles especially flexible soles and spons soles for footwear (shoes, sandals, etc are very important. This physical properties are : tensile strength; elongation at break; tensile stress at 100%; hardness; density; tear resistance; permanen set; abrasion resistance and flexing. The type of plastic material used for flexible and spons plastic soles, as recorded by infrared spectrophotometry analysis indicate that most of them are made by PVC. Physical test result shown that plastics soles can be graded into three categories in comparation with the specification of the IIS (Indonesian Industial Standard number SII 1103 – 84.

  1. Pengaruh Green Marketing Hotel Terhadap Green Consumer Behavior

    OpenAIRE

    Yo Fernandez, Eunike Christe; Tjoanda, Evelyn

    2017-01-01

    Penelitian ini dilakukan untuk mengetahui pengaruh dari green marketing hotel terhadap green consumer behavior. Green marketing memiliki 3 dimensi, yaitu green product, green price, dan green promotion. Penelitian ini melibatkan 272 responden masyarakat Surabaya dan menggunakan metode regresi linear berganda. Hasil penelitian menunjukkan bahwa green product dan green price berpengaruh secara positif dan signifikan sedangkan green promotion berpengaruh namun tidak signifikan terhadap green con...

  2. ANALISIS KONTRIBUSI PAJAK HOTEL TERHADAP PENDAPATAN ASLI DAERAH KABUPATEN NUNUKAN

    OpenAIRE

    -, MULIATI

    2014-01-01

    2014 Analisis Kontribusi Pajak Hotel terhadap Pendapatan Asli Daerah Kabupaten Nunukan Analysis of The Contributions Tax on Hotel Againts Regional Renenue Nunukan District Muliati Haerial M. Christian Mangiwa Penelitian ini bertujuan untuk mengetahui seberapa besar kontribusi pajak hotel terhadap pendapatan asli daerah, mengetahui sistem pengawasan, dan potensi yang ada untuk meningkatkan pajak hotel, mengetahui sistem dan prosedur...

  3. A technique to prepare boronated B72.3 monoclonal antibody for boron neutron capture therapy

    International Nuclear Information System (INIS)

    Ranadive, G.N.; Rosenzweig, H.S.; Epperly, M.W.

    1993-01-01

    B72.3 monoclonal antibody has been successfully boronated using mercaptoundecahydro-closo-dodecaborate (boron cage compound). The reagent was incorporated by first reacting the lysine residues of the antibody with m-maleimidobenzoyl succinimide ester (MBS), followed by Michael addition to the maleimido group by the mercapto boron cage compound to form a physiologically stable thioether linkage. Boron content of the antibody was determined by atomic absorption spectroscopy. For biodistribution studies, boronated antibody was radioiodinated with iodogen. 125 I-labeled and boronated B72.3 monoclonal antibody demonstrated clear tumor localization when administered via tail vein injections to athymic nude mice bearing LS174-T tumor xenografts. Boronated antibody was calculated to deliver 10 6 boron atoms per tumor cell. Although this falls short of the specific boron content originally proposed as necessary for boron neutron capture therapy (BNCT), recent calculations suggest that far fewer atoms of 10 B per tumor cell would be necessary to effect successful BNCT when the boron is targeted to the tumor cell membrane. (author)

  4. Boron carbide synthesis by carbothermic reduction of boron oxide

    International Nuclear Information System (INIS)

    Castro, A.R.M. de; Paschoal, J.O.A.

    1988-01-01

    Boron carbide (B 4 C) is a ceramic material of technological applications due to its extreme hardness and high chemical as well as thermal stability. Some parameters of the process for obtaining B 4 C by carbothermic reduction of B 2 O 3 have been determined. The starting powders and the final products have been analysed by chemical, spectrographic and X-ray diffraction methods. The results show that the B 4 C obtained by the carbothermic reduction process is suitable for applications with a definite determination of the free carbon content. (author) [pt

  5. PREVALENCE OF ACINETOBACTER BAUMANNII ISOLATED FROM CLINICAL SPECIMENS IN ADAM MALIK HOSPITAL

    OpenAIRE

    Evita Mayasari; Cherry Siregar

    2014-01-01

    AbstrakAcinetobacter baumannii merupakan spesies Acinetobacter spp. tersering diisolasi darimanusia, dan lebih sering dijumpai pada infeksi nosokomial dibandingkan dengan infeksi dikomunitas. Eksistensi bakteri ini di lingkungan terkait dengan keragaman reservoir, kemampuanmemperoleh gen pembawa sifat resisten antimikroba, dan sifat resisten terhadap pengeringan.Infeksi disebabkan strain A.baumannii yang resisten terhadap banyak antibiotik tidak mudahdikendalikan dan menjadi permasalahan di b...

  6. PERANAN KOHESIVITAS KELOMPOK DAN KECERDASAN EMOSIONAL TERHADAP ORGANIZATIONAL CITIZENSHIP BEHAVIOR

    Directory of Open Access Journals (Sweden)

    Eka Ruliza Harahap

    2017-08-01

    Full Text Available Tujuan penelitian adalah untuk mengetahui peranan kohesivitas kelompok dan kecerdasan emosional terhadap organizational citizenship behavior. Populasi penelitian adalah karyawan departemen produksi PT. Tanimas Soap Industries dimana seluruh anggota populasi berpartisipasi sebagai subyek penelitian. Data penelitian dikumpulkan dengan menggunakan tiga skala psikologi yaitu skala kohesivitas kelompok, skala kecerdasan emosional, dan skala organizational citizenship behavior. Analisa terhadap data yang terkumpul dilakukan dengan menggunakan uji regresi linear sederhana dan berganda.Hasil penelitian menunjukkan bahwa kohesivitas kelompok dan kecerdasan emosional berperan terhadap organizational citizenship behavior.Kecerdasan emosional diketahui memberikan sumbangan lebih besar terhadap organizational citizenship behavior dibandingkan kohesivitas kelompok. Aspek group integration social dari kohesivitas kelompok dan dimensi self-awareness dari kecerdasan emosional memberikan kontribusi paling besar terhadap organizational citizenship behavior.

  7. Fabrication of boron-phosphide neutron detectors

    International Nuclear Information System (INIS)

    Fitzsimmons, M.; Pynn, R.

    1997-01-01

    Boron phosphide is a potentially viable candidate for high neutron flux neutron detectors. The authors have explored chemical vapor deposition methods to produce such detectors and have not been able to produce good boron phosphide coatings on silicon carbide substrates. However, semi-conducting quality films have been produced. Further testing is required

  8. New techniques for producing thin boron films

    International Nuclear Information System (INIS)

    Thomas, G.E.

    1988-01-01

    A review will be presented of methods for producing thin boron films using an electron gun. Previous papers have had the problem of spattering of the boron source during the evaporation. Methods for reducing this problem will also be presented. 12 refs., 4 figs

  9. Boron rates for triticale and wheat crops

    Directory of Open Access Journals (Sweden)

    Corrêa Juliano Corulli

    2005-01-01

    Full Text Available No reports are registered on responses to boron fertilization nutrient deficiency and toxicity in triticale crops. The aim of this study was to evaluate triticale response to different rates of boron in comparison to wheat in an hapludox with initial boron level at 0.08 mg dm-3 4 4 factorial design trial completely randomized blocks design (n = 4. Boron rates were 0; 0.62; 1.24 and 1.86 mg dm-3; triticale cultivars were IAC 3, BR 4 and BR 53 and IAPAR 38 wheat crop was used for comparison. The wheat (IAPAR 38 crop presented the highest boron absorption level of all. Among triticale cultivars, the most responsive was IAC 53, presenting similar characteristics to wheat, followed by BR 4; these two crops are considered tolerant to higher boron rates in soil. Regarding to BR 53, no absorption effect was observed, and the cultivars was sensitive to boron toxicity. Absorption responses differed for each genotype. That makes it possible to choose and use the best-adapted plants to soils with different boron rates.

  10. Hot flow behavior of boron microalloyed steels

    International Nuclear Information System (INIS)

    Lopez-Chipres, E.; Mejia, I.; Maldonado, C.; Bedolla-Jacuinde, A.; El-Wahabi, M.; Cabrera, J.M.

    2008-01-01

    This research work studies the effect of boron contents on the hot flow behavior of boron microalloyed steels. For this purpose, uniaxial hot-compression tests were carried out in a low carbon steel microalloyed with four different amounts of boron over a wide range of temperatures (950, 1000, 1050 and 1100 deg. C) and constant true strain rates (10 -3 , 10 -2 and 10 -1 s -1 ). Experimental results revealed that both peak stress and peak strain tend to decrease as boron content increases, which indicates that boron additions have a solid solution softening effect. Likewise, the flow curves show a delaying effect on the kinetics of dynamic recrystallization (DRX) when increasing boron content. Deformed microstructures show a finer austenitic grain size in the steel with higher boron content (grain refinement effect). Results are discussed in terms of boron segregation towards austenitic grain boundaries during plastic deformation, which increases the movement of dislocations, enhances the grain boundary cohesion and modificates the grain boundary structure

  11. Elastic modulus and fracture of boron carbide

    International Nuclear Information System (INIS)

    Hollenberg, G.W.; Walther, G.

    1978-12-01

    The elastic modulus of hot-pressed boron carbide with 1 to 15% porosity was measured at room temperature. K/sub IC/ values were determined for the same porosity range at 500 0 C by the double torsion technique. The critical stress intensity factor of boron carbide with 8% porosity was evaluated from 25 to 1200 0 C

  12. PENGARUH UMUR POHON, BONITA DAN POSISI AKSIAL BATANG TERHADAP STRUKTUR MAKROSKOPIS DAN KUALITAS KAYU JATI SEBAGAI BAHAN FURNITUR (Effect of Tree Age, Site Quality Index and Trunk Axial Position on Macroscopic Structure and Quality of Teak Wood

    Directory of Open Access Journals (Sweden)

    Yustinus Suranto

    2015-03-01

    Full Text Available ABSTRAK Penggunaan kayu jati muda merupakan solusi alternatif terhadap terbatasnya ketersediaan bahan baku yang dihadapi oleh industri mebel. Kayu muda cenderung memiliki kayu berkualitas rendah. Salah satu pengukur kualitas kayu adalah sifat struktur makroskopik. Penelitian bertujuan untuk mengetahui pengaruh umur pohon, bonita dan posisi aksial batang terhadap struktur makroskopis kayu dan kualitas kayu. Tiga puluh enam pohon jati muda ditebang dari kawasan hutan KPH Kendal, Provinsi Jawa Tengah. Tiga cakram berketebalan 3 cm diambil dari masing-masing posisi aksial batang, yaitu bagian pangkal, tengah dan ujung. Pengukuran proporsi kayu teras dan dimensi lingkaran tahun dilakukan berdasarkan perbedaan warna alami dan dengan menggunakan lembaran plastik transparan bergambar pola milimeter. Data dianalisis dengan analisis varians dalam rancangan acak lengkap berblok yang disusun secara faktorial. Pengujian lanjutan dilakukan dengan uji HSD Duncan. Kualitas kayu ditentukan dengan analisis determinan berdasarkan kurva normal Z. Hasil penelitian menunjukkan bahwa interaksi tiga faktor tidak berpengaruh terhadap proporsi kayu teras, dan dimensi lingkaran tahun. Interaksi kelas umur dan bonita pengaruh nyata terhadap proporsi kayu teras dan dimensi lingkarah tahun. Posisi aksial batang berpengaruh secara nyata terhadap proporsi kayu teras dan berpengaruh sangat nyata terhadap dimensi lingkaran tahun. Semakin mendekat pada posisi pangkal batang, semakin tinggi proporsi kayu teras dan dimensi lingkaran tahun. Interaksi tiga faktor yaitu kelas umur V, bonita 4 dan posisi tengah batang menghasilkan kualitas kayu tertinggi, yaitu kelas 2, dan interaksi kelas umur V, bonita 3 dan bagian ujung batang menghasilkan kualitas terendah, yaitu kelas 4. Penggunaan kayu berbasis kualitas akan memaksimalkan nilai guna dan meningkatkan umur pakai produk, sehingga mengurangi intensitas penebangan hutan dan lebih ramah lingkungan hidup. ABSTRACT Young teak utilization

  13. Boron isotopic enrichment by displacement chromatography

    International Nuclear Information System (INIS)

    Mohapatra, K.K.; Bose, Arun

    2014-01-01

    10 B enriched boron is used in applications requiring high volumetric neutron absorption (absorption cross section- 3837 barn for thermal and 1 barn for 1 MeV fast neutron). It is used in fast breeder reactor (as control rod material), in neutron counter, in Boron Neutron Capture Therapy etc. Owing to very small separation factor, boron isotopic enrichment is a complex process requiring large number of separation stages. Heavy Water Board has ventured in industrial scale production of 10 B enriched boron using Exchange Distillation Process as well as Ion Displacement Chromatography Process. Ion Displacement Chromatography process is used in Boron Enrichment Plant at HWP, Manuguru. It is based on isotopic exchange between borate ions (B(OH) 4 - ) on anion exchange resin and boric acid passing through resin. The isotopic exchange takes place due to difference in zero point energy of 10 B and 11 B

  14. XPS analysis of boron doped heterofullerenes

    Energy Technology Data Exchange (ETDEWEB)

    Schnyder, B; Koetz, R [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Muhr, H J; Nesper, R [ETH Zurich, Zurich (Switzerland)

    1997-06-01

    Boron heterofullerenes were generated through arc-evaporation of doped graphite rods in a helium atmosphere. According to mass spectrometric analysis only mono-substituted fullerenes like C{sub 59}B, C{sub 69}B and higher homologues together with a large fraction of higher undoped fullerenes were extracted and enriched when pyridine was used as the solvent. XPS analysis of the extracts indicated the presence of two boron species with significantly different binding energies. One peak was assigned to borid acid. The second one corresponds to boron in the fullerene cage, which is mainly C{sub 59}B, according to the mass spectrum. This boron is in a somewhat higher oxidation state than that of ordinary boron-carbon compounds. The reported synthesis and extraction procedure opens a viable route for production of macroscopic amounts of these compounds. (author) 2 figs., 1 tab., 7 refs.

  15. Sifat Fisik Pati Ganyong (Canna edulis Kerr. Termodifikasi dan Penambahan Gum Xanthan untuk Rerotian (Physical Characteristics of Modified Canna edulis Kerr. Starch and Gum Xanthan for Bakeries

    Directory of Open Access Journals (Sweden)

    Parwiyanti Parwiyanti

    2016-12-01

    dengan uji BNJ (α = 0,05. Parameter yang diamati swelling power (SP, indeks kelarutan dalam air (IKA, indeks absobsi air (IAA, derajat pengembangan (DP, dan densitas kamba (DK pati ganyong termodifikasi. Hasil penelitian menunjukkan bahwa modifikasi pati ganyong dengan kombinasi perlakuan suhu dan waktu HMT serta konsentrasi GX menghasilkan pati termodifikasi dengan sifat fisik yang berbeda nyata antar perlakuan maupun pati alaminya.  Modifikasi pati ganyong dengan HMT pada suhu 80 °C, waktu 8 jam, kadar air pati 15 % dan konsentrasi gum xanthan 1 % dapat menghasilkan pati ganyong yang sifat fisiknya mendekati tepung terigu kadar protein sedang dan berbeda dengan pati ganyong alami. Sifat fisik pati ganyong termodifikasi tersebut adalah SP 16,90 ± 0,48 g/g, IKA 10,28 ± 0,25 %, IAA 112,58 ± 0,38 %, DP 0,94 ± 0,11 mL/g, dan DK 0,73 ± 0,026 g/mL. Kata kunci: Pati ganyong; gum xanthan; HMT; modifikasi; sifat fisik

  16. Cathodoluminescence of cubic boron nitride

    International Nuclear Information System (INIS)

    Tkachev, V.D.; Shipilo, V.B.; Zajtsev, A.M.

    1985-01-01

    Three optically active defects are detected in mono- and polycrystal cubic boron nitride (β-BN). Analysis of intensity of temperature dependences, halfwidth and energy shift of 1.76 eV narrow phononless line (center GC-1) makes it possible to interprete the observed cathodoluminescence spectra an optical analog of the Moessbaner effect. Comparison of the obtained results with the known data for diamond monocrystals makes it possible to suggest that the detected center GC-1 is a nitrogen vacancy . The conclusion, concerning the Moessbauer optical spectra application, is made to analyze structural perfection of β-BN crystal lattice

  17. Boron enrichment in martian clay.

    Directory of Open Access Journals (Sweden)

    James D Stephenson

    Full Text Available We have detected a concentration of boron in martian clay far in excess of that in any previously reported extra-terrestrial object. This enrichment indicates that the chemistry necessary for the formation of ribose, a key component of RNA, could have existed on Mars since the formation of early clay deposits, contemporary to the emergence of life on Earth. Given the greater similarity of Earth and Mars early in their geological history, and the extensive disruption of Earth's earliest mineralogy by plate tectonics, we suggest that the conditions for prebiotic ribose synthesis may be better understood by further Mars exploration.

  18. KARAKTERISTIK BATUBARA DAN PENGARUHNYA TERHADAP PROSES PENCAIRAN

    Directory of Open Access Journals (Sweden)

    Harli Talla

    2014-12-01

    Full Text Available Tujuan penelitian ini adalah mempelajari pengaruh karakteristik batubara terhadap proses pencairan dengan menggunakan metoda hidrogenasi katalitik. Sampel batubara yang digunakan adalah batubara Sorong dengan peringkat lignit dan batubara Mulia dengan peringkat sub bituminus. Proses pencairan dilakukan dalam sebuah otoklaf yang berkapasitas 5 liter dengan menggunakan pelarut antrasen dan katalis bijih besi. Kisaran suhu pencairan adalah 375ºC, 400ºC, 425ºC, dan 450ºC, sementara tekanan awal hidrogen ditetapkan 100 bar. Hasil yang diperoleh menunjukan bahwa karakteristik batubara memiliki pengaruh yang signifikan terhadap pencairan. Konversi tertinggi batubara Sorong adalah 89,94% pada suhu 400ºC, sementara untuk batubara Mulia sebesar 87,28% pada suhu 450ºC

  19. Chemistry and technology of boron and its compounds

    International Nuclear Information System (INIS)

    Zhigach, A.F.; Parfenov, B.P.; Svitsyn, R.A.

    1995-01-01

    The results of research dealing with development of technologies of boron trichloride, boron hydride, aminoderivative boron hydrides, metal borohydrides, carboranes, carborane-containing polymers, carried out at the institute of organoelemental compounds, are presented. Physicochemical properties of the compounds have been studied and analytical methods have been developed. Data on toxicity and fire hazard of boron compounds are provided

  20. Analysis of boron nitride by flame spectrometry methods

    International Nuclear Information System (INIS)

    Telegin, G.F.; Chapysheva, G.Ya.; Shilkina, N.N.

    1989-01-01

    A rapid method has been developed for determination of free and total boron contents as well as trace impurities in boron nitride by using autoclave sample decomposition followed by atomic emission and atomic absorption determination. The relative standard deviation is not greater than 0.03 in the determination of free boron 0.012 in the determination of total boron content

  1. PENGARUH BACKGROUND MAHASISWA TERHADAP KINERJA AKADEMIK

    Directory of Open Access Journals (Sweden)

    Trianasari Angkawijaya

    2014-09-01

    Full Text Available Abstract: The Effect of Students’ Background on Academic Performance. This study examines the effect of background variables on the academic performance of accounting students in a private university in Surabaya. The background variables under study included previous academic performance, prior knowledge on accounting, sex, motivation, preparedness, and expectations. The results show that previous academic performance, motivation, and expectations have positive and significant effects on the students’ overall academic performance in accounting, while preparedness affects only the students’ performance in management accounting. In contrast, prior knowledge on accounting and sex do not give significant impacts to the students’ overall academic performance.These findings indicate the importance of previous aca­demic performance as well as motivation and expectations as background variables in current academic performance. Keywords: students’ background, academic performance, accounting Abstrak: Pengaruh Background Mahasiswa terhadap Kinerja Akademik. Penelitian ini mengkaji pengaruh variabel background terhadap kinerja akademik mahasiswa akuntansi di Universitas Surabaya. Lima variabel background utama dipergunakan, yaitu kinerja akademik sebelumnya, pengetahuan akun­tansi sebelumnya, jenis kelamin, motivasi, kesiapan, dan ekspektasi. Hipotesis diuji menggunakan model regresi linier berganda OLS dan Robust Standar Error. Hasil penelitian memerlihatkan bahwa kinerja akademik sebelumnya, motivasi, dan ekspektasi memiliki pengaruh positif signifikan terhadap kinerja akademik keseluruhan, sementara kesiapan memberikan pengaruh positif hanya pada kinerja akademik akuntansi manajemen. Sebaliknya, pengetahuan akuntansi sebelumnya dan jenis kelamin tidak memberi­kan pengaruh signifikan terhadap kinerja akademik keseluruhan. Temuan ini mengindikasikan bahwa kinerja akademik sebelumnya beserta motivasi dan ekspektasi adalah variabel background

  2. FAKTOR PENDUKUNG TERHADAP INTENSI BERWIRAUSAHA PADA MAHASISWA

    Directory of Open Access Journals (Sweden)

    Irene Paulina

    2012-03-01

    Full Text Available Penelitian ini bertujuan untuk menganalisis pola hubungan kausal antara kecerdasan emosi, sikap mandiri, dan lingkungan terhadap intensi berwirausaha pada mahasiswa Universitas Gunadarma. Kecerdasan emosi, sikap mandiri, dan lingkungan perlu dimiliki oleh seseorang untuk membangun intensi berwirausaha. Data yang digunakan merupakan data primer dimana sampel diambil berdasar simple random sampling sebanyak 200 mahasiswa Fakultas Ekonomi Universitas Gunadarma angkatan 2007 dan 2008. Model persamaan struktural digunakan untuk menguji hipotesis penelitian dengan bantuan aplikasi AMOS 7.0. Hasil penelitian menunjukkan bahwa kecerdasan emosi berpengaruh langsung dan positif dengan tingkat signifikansi terhadap intensi berwirausaha, sedangkan sikap mandiri berpengaruh signifikan terhadap intensi berwirausaha, adapun lingkungan tidak berpengaruh terhadap intensi berwirausaha.This study aims to analyze the pattern of causal relationships between emotional intelligence, independent attitude, and environment on entrepreneurial intentions of university students Gunadarma on emotional intelligence, independent attitude, and environment need to be owned by the person’s intention to build entrepreneurship. The data used are the primary data where samples are taken by simple random sampling of 200 students of the Faculty of Economics, University Gunadarma class of 2007 and 2008. Structural equation model is used to test the research hypotheses with the help of AMOS 7.0 applications. The results showed that the direct effect of emotional intelligence and positive with a significance level of entrepreneurial intention, the independent attitude significantly influences entrepreneurial intentions, on the other hand, the environment had no effect on entrepreneurial intentions, As the result this concept map have affectivity to be used in inquiry learning.

  3. Dukungan Target Group Terhadap Zoning Regulation

    Directory of Open Access Journals (Sweden)

    Susi Ridhawati

    2014-05-01

    Full Text Available Kegiatan pembangunan yang diwarnai oleh market driven akan menyebabkan kerusakan lingkungan. Apabila terjadi secara terus-menerus, bisa mengakibatkan penurunan kualitas lingkungan hidup. Oleh karena itu penataan ruang (spatial planning menjadi aspek yang amat penting agar ruang yang terbatas dapat digunakan secara efisien dengan tetap memelihara kelestarian dan daya dukung lingkungan hidup. Proses invasi dan urban sprawl sebagai akibat dari keterbatasan ruang perkotaan telah merembet ke sebagian daerah di Kabupaten Sleman, terutama di wilayah Kecamatan Mlati. Perkembangan wilayah di daerah ini perlu mendapatkan perhatian khusus agar di kemudian hari tidak menjadi unmanaged growth. Untuk menjaga kelestarian alam dan mengurangi dampak kerusakan lingkungan yang bisa berakibat terhadap terganggunya sistem ekologi wilayah sekitar Kabupaten Sleman, Badan Pengendalian Pertanahan Daerah (BPPD Kabupaten Sleman melakukan pengendalian atas perubahan penggunaan tanah melalui sosialisasi atas kebijakan pertanahan yang telah ditetapkan Pemerintah Kabupaten Sleman. BPPD memasang/membuat papan informasi/baliho pada tempat strategis, sehingga dapat dibaca dengan mudah oleh masyarakat. Salah satu baliho dipasang di kawasan pertanian di Jalan Sendari-Gombang, Tirtoadi, Kecamatan Mlati. Berkenaan dengan hal di atas, penelitian ini bertujuan untuk menilai sikap target grup terhadap zoning regulations dengan studi kasus di Jalan Sendari Gombang Tirtoadi, Kecamatan Mlati. Penelitian juga ingin mengungkap faktor-faktor yang memengaruhi dukungan target grup terhadap implementasi zoning regulations di Kecamatan Mlati, terutama di Jalan Sendari-Gombang, Tirtoadi. Penelitian menggunakan pendekatan deskriptif naturalistik dengan metode studi kasus.

  4. Study of ceramic mixed boron element as a neutron shielding

    International Nuclear Information System (INIS)

    Ismail Mustapha; Mohd Reusmaazran Yusof; Md Fakarudin Ab Rahman; Nor Paiza Mohamad Hasan; Samihah Mustaffha; Yusof Abdullah; Mohamad Rabaie Shari; Airwan Affandi Mahmood; Nurliyana Abdullah; Hearie Hassan

    2012-01-01

    Shielding upon radiation should not be underestimated as it can causes hazard to health. Precautions on the released of radioactive materials should be well concerned and considered. Therefore, the combination of ceramic and boron make them very useful for shielding purpose in areas of low and intermediate neutron. A six grades of ceramic tile have been produced namely IMN05 - 5 % boron, IMN06 - 6 % boron, IMN07 - 7 % boron, IMN08 - 8 % boron, IMN09 - 9 % boron, IMN10 - 10 % boron from mixing, press and sintered process. Boron is a material that capable of absorbing and capturing neutron, so that neutron and gamma test were conducted to analyze the effectiveness of boron material in combination with ceramic as shielding. From the finding, percent reduction number of count per minute shows the ceramic tiles are capable to capture neutron. Apart from all the percentage of boron used, 10 % is the most effective shields since the percent reduction indicating greater neutron captured increased. (author)

  5. Boron-Loaded Silicone Rubber Scintillators

    Energy Technology Data Exchange (ETDEWEB)

    Bell, Z.W.; Maya, L.; Brown, G.M.; Sloop, F.V.Jr

    2003-05-12

    Silicone rubber received attention as an alternative to polyvinyltoluene in applications in which the scintillator is exposed to high doses because of the increased resistance of the rubber to the formation of blue-absorbing color centers. Work by Bowen, et al., and Harmon, et al., demonstrated their properties under gamma/x-ray irradiation, and Bell, et al. have shown their response to thermal neutrons. This last work, however, provided an example of a silicone in which both the boron and the scintillator were contained in the rubber as solutes, a formulation which led to the precipitation of solids and sublimation of the boron component. In the present work we describe a scintillator in which the boron is chemically bonded to the siloxane and so avoids the problem of precipitation and loss of boron to sublimation. Material containing up to 18% boron, by weight, was prepared, mounted on photomultipliers, and exposed to both neutron and gamma fluxes. Pulse height spectra showing the neutron and photon response were obtained, and although the light output was found to be much poorer than from samples in which boron was dissolved, the higher boron concentrations enabled essentially 100% neutron absorption in only a few millimeters' thickness of rubber.

  6. Density separation of boron particles. Final report

    International Nuclear Information System (INIS)

    Smith, R.M.

    1980-04-01

    A density distribution much broader than expected was observed in lots of natural boron powder supplied by two different sources. The material in both lots was found to have a rhombohedral crystal structure, and the only other parameters which seemed to account for such a distribution were impurities within the crystal structure and varying isotopic ratios. A separation technique was established to isolate boron particles in narrow densty ranges. The isolated fractions were subsequently analyzed for B 10 and total boron content in an effort to determine whether selective isotopic enrichment and nonhomogeneous impurity distribution were the causes for the broad density distribution of the boron powders. It was found that although the B 10 content remained nearly constant around 18%, the total boron content varied from 37.5 to 98.7%. One of the lots also was found to contain an apparently high level of alpha rhombohedral boron which broadened the density distribution considerably. During this work, a capability for removing boron particles containing gross amounts of impurities and, thereby, improving the overall purity of the remaining material was developed. In addition, the separation technique used in this study apparently isolated particles with alpha and beta rhombohedral crystal structures, although the only supporting evidence is density data

  7. Cell cycle dependence of boron uptake in various boron compounds used for neutron capture therapy

    International Nuclear Information System (INIS)

    Yoshida, F.; Matsumura, A.; Shibata, Y.; Yamamoto, T.; Nose, T.; Okumura, M.

    2000-01-01

    In neutron capture therapy, it is important that the tumor take boron in selectively. Furthermore, it is ideal when the uptake is equal in each tumor cell. Some indirect proof of differences in boron uptake among neoplastic cell cycles has been documented. However, no investigation has yet measured boron uptake directly. Using flow cytometry, in the present study cells were sorted by G0/G1 phase and G2/M phase, and the boron concentration of each fraction was measured with inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The results were that BSH (sodiumborocaptate) and BPA (p-boronophenylalanine) had higher rates of boron uptake in the G2/M group than in the G0/G1 group. However, in BPA the difference was more prominent, which revealed a 2.2-3.3 times higher uptake of boron in the G2/M group than in the G0/G1 group. (author)

  8. The determination of boron and carbon in reactor grade boron carbide

    International Nuclear Information System (INIS)

    Crossley, D.; Wood, A.J.; McInnes, C.A.J.; Jones, I.G.

    1978-09-01

    The sealed tube method of dissolution at high temperature and pressure has been successfully applied in the analysis of reactor grade boron carbide for the determination of boron. A 50 mg sample of boron carbide is completely dissolved by heating with concentrated nitric acid in a sealed tube at 300 0 C. The boron content of the resultant sample solution is determined by the mannitol potentiometric titration method. The precision of the method for the determination of 2.5 mg of boron using the Harwell automatic potentiometric titrator is 0.2% (coefficient of variation). The carbon content of a boron carbide sample is determined by combustion of the sample at 1050 0 C in a stream of oxygen using vanadium pentoxide to ensure the complete oxidation of the sample. The carbon dioxide produced from the sample is measured manometrically and the precision of the method for the determination of 4 mg of carbon is 0.4% (coefficient of variation). (author)

  9. PENGARUH PELATIHAN DAN PENGEMBANGAN TERHADAP MOTIVASI DAMPAKNYA TERHADAP PRESTASI KERJA KARYAWAN DI LOKAWISATA BATURRADEN

    Directory of Open Access Journals (Sweden)

    Sopa Martina

    2016-03-01

      Abstrak - Dalam suatu organisasi faktor Sumber Daya Manusia (SDM mempunyai peranan yang penting dibandingkan dengan faktor lain. Apabila organisasi mengalami kegagalan dalam mencapai tujuan, maka faktor manusia dapat menjadi penyebab didalamnya. Oleh karena itu karyawan perlu mendapatkan pelatihan dan pengembangan untuk dapat memotivasi diri sendiri untuk bekerja dengan lebih baik sehingga tercapai prestasi kerja yang baik pula. Penelitian ini dilakukan dengan menggunakan metode deskriptif. Berdasarkan hasil penelitian dari 61 orang responden tersebut maka didapat hasil dalam kategori baik sebesar 81,8% untuk pelatihan dan pengembangan yang tersedia, hasil dalam kategori baik sebesar 74,3% untuk motivasi karyawan, dan hasil dalam prestasi kerja karyawan Lokawisata Baturraden sebesar 86,3% dalam kategori sangat baik. Sedangkan untuk pengaruh pelatihan dan pengembanagn terhadap motivasi karyawan didapat nilai korelasi sebesar 41,21%, dan untuk pengaruh variabel motivasi terhadap prestasi kerja karyawan Lokawisata Baturraden  sebesar 11,42%. Sehingga didapat nilai total untuk pengaruh pelatihan dan pengembangan terhadap motivasi dan dampaknya terhadap prestasi kerja sebesar 52,63%. Sisanya sebesar 47,37% dipengaruhi oleh faktor lain.   Kata kunci : motivasi, pelatihan dan pengembangan, prestasi kerja

  10. Developments in boron magnetic resonance imaging (MRI)

    International Nuclear Information System (INIS)

    Schweizer, M.

    1995-01-01

    This report summarizes progress during the past year on maturing Boron-11 magnetic resonance imaging (MRI) methodology for noninvasive determination of BNCT agents (BSH) spatially in time. Three major areas are excerpted: (1) Boron-11 MRI of BSH distributions in a canine intracranial tumor model and the first human glioblastoma patient, (2) whole body Boron-11 MRI of BSH pharmacokinetics in a rat flank tumor model, and (3) penetration of gadolinium salts through the BBB as a function of tumor growth in the canine brain

  11. Characterization of boron tolerant bacteria isolated from a fly ash dumping site for bacterial boron remediation.

    Science.gov (United States)

    Edward Raja, Chellaiah; Omine, Kiyoshi

    2013-08-01

    Boron is an essential micronutrient for plants, but can above certain concentrations be toxic to living organisms. A major environmental concern is the removal of boron from contaminated water and fly ash. For this purpose, the samples were collected from a fly ash dumping site, Nagasaki prefecture, Japan. The chemical characteristics and heavy metal concentration of the samples were performed by X-ray fluorescent analysis and leaching test. For bacterial analysis, samples were collected in sterile plastic sheets and isolation was carried out by serial dilution method. The boron tolerant isolates that showed values of maximum inhibitory concentration toward boron ranging from 100 to 260 mM level were screened. Based on 16S rRNA sequencing and phylogenetic analysis, the isolates were most closely related to the genera Bacillus, Lysinibacillus, Microbacterium and Ralstonia. The boron tolerance of these strains was also associated with resistant to several heavy metals, such as As (III), Cr (VI), Cd, Cu, Pb, Ni, Se (III) and Zn. Indeed, these strains were arsenic oxidizing bacteria confirmed by silver nitrate test. These strains exhibited their salt resistances ranging from 4 to 15 % were determined in Trypticase soy agar medium. The boron tolerant strains were capable of removing 0.1-2.0 and 2.7-3.7 mg l(-1) boron from the medium and fly ash at 168 h. Thus, we have successfully identified the boron tolerant and removal bacteria from a fly ash dumping site for boron remediation.

  12. Investigation of boron extraction process with aid magnesium hydroxide from mother liquor of boron production

    International Nuclear Information System (INIS)

    Balapanova, B.S.; Zhajmina, R.E.; Serazetdinov, D.Z.

    1988-01-01

    Conditions of boron - magnesium concentrate preparation from mother liquor by coprecipitation of borate - ions by magnesium hydroxide are investigated. It is shown that boron - magnesium concentrate and products of its heat treatment at 100 - 500 deg C in water are dissolved partially, and in ammonium citrate - practically completely. Suppositions are made on the composition of the product prepared, on the the structure of its crystal lattice and the processes taking place in it during heat treatment. The conclusion is made on the perspectiveness of processing of mother liquor of boron industry for boron - magnesium concentrate

  13. Cathodoluminescence of cubic boron nitride

    International Nuclear Information System (INIS)

    Tkachev, V.D.; Shipilo, V.B.; Zaitsev, A.M.

    1985-01-01

    Three types of optically active defect were observed in single-crystal and polycrystalline cubic boron nitride (β-BN). An analysis of the temperature dependences of the intensity, half-width, and energy shift of a narrow zero-phonon line at 1.76 eV (GC-1 center) made it possible to interpret the observed cathodoluminescence spectra as an optical analog of the Moessbauer effect. A comparison of the results obtained in the present study with the available data on diamond single crystals made it possible to identify the observed GC-1 center as a nitrogen vacancy. It was concluded that optical Moessbauer-type spectra can be used to analyze structure defects in the crystal lattice of β-BN

  14. Behaviour of boron in Mandovi estuary (Goa)

    Digital Repository Service at National Institute of Oceanography (India)

    Shirodkar, P.V.; Anand, S.P.

    and alkalinity gave positive correlations with a linear variation. Though the overall behavioural pattern of boron indicated non-conservative nature, it showed a quasi-conservative character during premonsoon and a non-conservative during rest of the seasons...

  15. Internal stress control of boron thin film

    International Nuclear Information System (INIS)

    Satomi, N.; Kitamura, M.; Sasaki, T.; Nishikawa, M.

    1998-01-01

    The occurrence of stress in thin films has led to serious stability problems in practical use. We have investigated the stress in the boron films to find the deposition condition of the boron films with less stress. It was found that the stress in the boron film varies sufficiently from compressive to tensile stress, that is from -1.0 to 1.4 GPa, depending on the evaporation conditions, such as deposition rate and the substrate temperature. Hydrogen ion bombardment resulted in the enhancement of the compressive stress, possibly due to ion peening effect, while under helium ion bombardment, stress relief was observed. The boron film with nearly zero stress was obtained by the evaporation at a deposition rate of 0.5 nm s -1 and substrate temperature of 300 C. (orig.)

  16. Internal stress control of boron thin film

    Energy Technology Data Exchange (ETDEWEB)

    Satomi, N.; Kitamura, M.; Sasaki, T.; Nishikawa, M. [Osaka Univ., Suita (Japan). Graduate Sch. of Eng.

    1998-09-01

    The occurrence of stress in thin films has led to serious stability problems in practical use. We have investigated the stress in the boron films to find the deposition condition of the boron films with less stress. It was found that the stress in the boron film varies sufficiently from compressive to tensile stress, that is from -1.0 to 1.4 GPa, depending on the evaporation conditions, such as deposition rate and the substrate temperature. Hydrogen ion bombardment resulted in the enhancement of the compressive stress, possibly due to ion peening effect, while under helium ion bombardment, stress relief was observed. The boron film with nearly zero stress was obtained by the evaporation at a deposition rate of 0.5 nm s{sup -1} and substrate temperature of 300 C. (orig.) 12 refs.

  17. Determination of boron in amorphous alloys

    Energy Technology Data Exchange (ETDEWEB)

    Grazhulene, S.S.; Grossman, O.V.; Kuntscher, K.K.; Malygina, L.I.; Muller, E.N.; Telegin, G.F.

    1985-10-01

    In the determination of boron in amorphous alloys containingFe, Co, B, Si, Ni, and P having unusal magnetic and electrical properties, precise analysis and rapid analysis are necessary. To improve the metrological properties of the existing procedure, to find a rapid determination of boron in amorphous alloys, and to verify the accuracy of the results, in the present work the optimization of the photometric determination after extraction of the BF/sup -//sub 4/ ion pair with methylene blue has been studied, and a boron determination by flame photometry using selective methylation has been developed. The determination of boron by the flame photometric and spectrophotometric methods is shown. When a highly precise determination is needed, the spectrophotometric procedure can be used. This procedure is distinguished by its labor intensity and duration. When the need for reproducibility is less severe, the rapid flame photometric procedure is best.

  18. Boron adsorption on hematite and clinoptilolite

    International Nuclear Information System (INIS)

    Gainer, G.M.

    1993-01-01

    This thesis describes experiments performed to determine the suitability of boron as a potential reactive tracer for use in saturated-zone C-well reactive tracer studies for the Yucca Mountain Project (YMP). Experiments were performed to identify the prevalent sorption mechanism of boron and to determine adsorption of boron on hematite and clinoptilolite as a function of pH. These minerals are present in the Yucca Mountain tuff in which the C-well studies will be conducted. Evaluation of this sorption mechanism was done by determining the equilibration time of boron-mineral suspensions, by measuring changes in equilibrium to titrations, and by measuring electrophoretic mobility. Experiments were performed with the minerals suspended in NaCl electrolytes of concentrations ranging from 0.1 N NaCl to 0.001 N NaCl. Experimentalconditions included pH values between 3 and 12 and temperature of about 38 degrees C

  19. Boron-isotope fractionation in plants

    Energy Technology Data Exchange (ETDEWEB)

    Marentes, E [Univ. of Guelph, Dept. of Horticultural Science, Guelph, Ontario (Canada); Vanderpool, R A [USDA/ARS Grand Forks Human Nutrition Research Center, Grand Forks, North Dakota (United States); Shelp, B J [Univ. of Guelph, Dept. of Horticultural Science, Guelph, Ontario (Canada)

    1997-10-15

    Naturally-occurring variations in the abundance of stable isotopes of carbon, nitrogen, oxygen, and other elements in plants have been reported and are now used to understand various physiological processes in plants. Boron (B) isotopic variation in several plant species have been documented, but no determination as to whether plants fractionate the stable isotopes of boron, {sup 11}B and {sup 10}B, has been made. Here, we report that plants with differing B requirements (wheat, corn and broccoli) fractionated boron. The whole plant was enriched in {sup 11}B relative to the nutrient solution, and the leaves were enriched in {sup 10}B and the stem in {sup 11}B relative to the xylem sap. Although at present, a mechanistic role for boron in plants is uncertain, potential fractionating mechanisms are discussed. (author)

  20. Boron-isotope fractionation in plants

    International Nuclear Information System (INIS)

    Marentes, E.; Vanderpool, R.A.; Shelp, B.J.

    1997-01-01

    Naturally-occurring variations in the abundance of stable isotopes of carbon, nitrogen, oxygen, and other elements in plants have been reported and are now used to understand various physiological processes in plants. Boron (B) isotopic variation in several plant species have been documented, but no determination as to whether plants fractionate the stable isotopes of boron, 11 B and 10 B, has been made. Here, we report that plants with differing B requirements (wheat, corn and broccoli) fractionated boron. The whole plant was enriched in 11 B relative to the nutrient solution, and the leaves were enriched in 10 B and the stem in 11 B relative to the xylem sap. Although at present, a mechanistic role for boron in plants is uncertain, potential fractionating mechanisms are discussed. (author)

  1. Superplastic boronizing of duplex stainless steel under dual compression method

    International Nuclear Information System (INIS)

    Jauhari, I.; Yusof, H.A.M.; Saidan, R.

    2011-01-01

    Highlights: → Superplastic boronizing. → Dual compression method has been developed. → Hard boride layer. → Bulk deformation was significantly thicker the boronized layer. → New data on boronizing could be expanded the application of DSS in industries. - Abstract: In this work, SPB of duplex stainless steel (DSS) under compression method is studied with the objective to produce ultra hard and thick boronized layer using minimal amount of boron powder and at a much faster boronizing time as compared to the conventional process. SPB is conducted under dual compression methods. In the first method DSS is boronized using a minimal amount of boron powder under a fix pre-strained compression condition throughout the process. The compression strain is controlled in such a way that plastic deformation is restricted at the surface asperities of the substrate in contact with the boron powder. In the second method, the boronized specimen taken from the first mode is compressed superplastically up to a certain compressive strain under a certain strain rate condition. The process in the second method is conducted without the present of boron powder. As compared with the conventional boronizing process, through this SPB under dual compression methods, a much harder and thicker boronized layer thickness is able to be produced using a minimal amount of boron powder.

  2. Superplastic boronizing of duplex stainless steel under dual compression method

    Energy Technology Data Exchange (ETDEWEB)

    Jauhari, I., E-mail: iswadi@um.edu.my [Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur (Malaysia); Yusof, H.A.M.; Saidan, R. [Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur (Malaysia)

    2011-10-25

    Highlights: {yields} Superplastic boronizing. {yields} Dual compression method has been developed. {yields} Hard boride layer. {yields} Bulk deformation was significantly thicker the boronized layer. {yields} New data on boronizing could be expanded the application of DSS in industries. - Abstract: In this work, SPB of duplex stainless steel (DSS) under compression method is studied with the objective to produce ultra hard and thick boronized layer using minimal amount of boron powder and at a much faster boronizing time as compared to the conventional process. SPB is conducted under dual compression methods. In the first method DSS is boronized using a minimal amount of boron powder under a fix pre-strained compression condition throughout the process. The compression strain is controlled in such a way that plastic deformation is restricted at the surface asperities of the substrate in contact with the boron powder. In the second method, the boronized specimen taken from the first mode is compressed superplastically up to a certain compressive strain under a certain strain rate condition. The process in the second method is conducted without the present of boron powder. As compared with the conventional boronizing process, through this SPB under dual compression methods, a much harder and thicker boronized layer thickness is able to be produced using a minimal amount of boron powder.

  3. Boron dose determination for BNCT using Fricke and EPR dosimetry

    International Nuclear Information System (INIS)

    Wielopolski, L.; Ciesielski, B.

    1995-01-01

    In Boron Neutron Capture Therapy (BNCT) the dominant dose delivered to the tumor is due to α and 7 Li charged particles resulting from a neutron capture by 10 B and is referred to herein as the boron dose. Boron dose is directly attributable to the following two independent factors, one boron concentration and the neutron capture energy dependent cross section of boron, and two the energy spectrum of the neutrons that interact with boron. The neutron energy distribution at a given point is dictated by the incident neutron energy distribution, the depth in tissue, geometrical factors such as beam size and patient's dimensions. To account for these factors can be accommodated by using Monte Carlo theoretical simulations. However, in conventional experimental BNCT dosimetry, e.g., using TLDs or ionization chambers, it is only possible to estimate the boron dose. To overcome some of the limitations in the conventional dosimetry, modifications in ferrous sulfate dosimetry (Fricke) and Electron Paramagnetic Resonance (EPR) dosimetry in alanine, enable to measure specifically boron dose in a mixed gamma neutron radiation fields. The boron dose, in either of the dosimeters, is obtained as a difference between measurements with boronated and unboronated dosimeters. Since boron participates directly in the measurements, the boron dosimetry reflects the true contribution, integral of the neutron energy spectrum with boron cross section, of the boron dose to the total dose. Both methods are well established and used extensively in dosimetry, they are presented briefly here

  4. Boron-rich oligomers for BNCT

    International Nuclear Information System (INIS)

    Gula, M.; Perleberg, O.; Gabel, D.

    2000-01-01

    The synthesis of two BSH derivatives is described, which can be used for oligomerization in DNA-synthesizers. Synthesis pathways lead to final products in five and six steps, respectively. Because of chirality interesting results were expected. NMR-measurements confirm this expectation. Possible oligomers with high concentrations of boron can be attached to biomolecules. These oligomers can be explored with several imaging methods (EELS, PEM) to determine the lower detection limit of boron with these methods. (author)

  5. Rare earth-iron-boron premanent magnets

    International Nuclear Information System (INIS)

    Ghendehari, M.H.

    1988-01-01

    This patent describes a method for producing rare earth-iron-boron permanent magnets containing added rare earth oxide, comprising the steps of: (a) mixing a particulate alloy containing at least one rare earth metal, iron, and boron with at least one particulate rare earth oxide; (b) aligning magnetic domains of the mixture in a magnetic field; (c) compacting the aligned mixture to form a shape; and (d) sintering the compacted shape

  6. Quantitative analysis of boron by neutron radiography

    International Nuclear Information System (INIS)

    Bayuelken, A.; Boeck, H.; Schachner, H.; Buchberger, T.

    1990-01-01

    The quantitative determination of boron in ores is a long process with chemical analysis techniques. As nuclear techniques like X-ray fluorescence and activation analysis are not applicable for boron, only the neutron radiography technique, using the high neutron absorption cross section of this element, can be applied for quantitative determinations. This paper describes preliminary tests and calibration experiments carried out at a 250 kW TRIGA reactor. (orig.) [de

  7. Discharge cleaning on TFTR after boronization

    International Nuclear Information System (INIS)

    Mueller, D.; Dylla, H.F.; LaMarche, P.H.; Bell, M.G.; Blanchard, W.; Bush, C.E.; Gentile, C.; Hawryluk, R.J.; HIll, K.W.; Janos, A.C.; Jobes, F.C; Owens, D.K.; Pearson, G.; Schivell, J.; Ulrickson, M.A.; Vannoy, C.; Wong, K.L.

    1991-05-01

    At the beginning of the 1990 TFTR experimental run, after replacement of POCO-AXF-5Q graphite tiles on the midplane of the bumper limiter by carbon fiber composite (CFC) tiles and prior to any Pulse Discharge Cleaning (PDC), boronization was performed. Boronization is the deposition of a layer of boron and carbon on the vacuum vessel inner surface by a glow discharge in a diborane, methane and helium mixture. The amount of discharge cleaning required after boronization was substantially reduced compared to that which was needed after previous openings when boronization was not done. Previously, after a major shutdown, about 10 5 low current (∼20 kA) Taylor Discharge Cleaning (TDC) pulses were required before high current (∼400 kA) aggressive Pulse Discharge Cleaning (PDC) pulses could be performed successfully. Aggressive PDC is used to heat the limiters from the vessel bakeout temperature of 150 degrees C to 250 degrees C for a period of several hours. Heating the limiters is important to increase the rate at which water is removed from the carbon limiter tiles. After boronization, the number of required TDC pulses was reduced to <5000. The number of aggressive PDC pulses required was approximately unchanged. 14 refs., 1 tab

  8. Boronization on NSTX using Deuterated Trimethylboron

    International Nuclear Information System (INIS)

    Blanchard, W.R.; Gernhardt, R.C.; Kugel, H.W.; LaMarche, P.H.

    2002-01-01

    Boronization on the National Spherical Torus Experiment (NSTX) has proved to be quite beneficial with increases in confinement and density, and decreases in impurities observed in the plasma. The boron has been applied to the interior surfaces of NSTX, about every 2 to 3 weeks of plasma operation, by producing a glow discharge in the vacuum vessel using deuterated trimethylboron (TMB) in a 10% mixture with helium. Special NSTX requirements restricted the selection of the candidate boronization method to the use of deuterated boron compounds. Deuterated TMB met these requirements, but is a hazardous gas and special care in the execution of the boronization process is required. This paper describes the existing GDC, Gas Injection, and Torus Vacuum Pumping System hardware used for this process, the glow discharge process, and the automated control system that allows for remote operation to maximize both the safety and efficacy of applying the boron coating. The administrative requirements and the detailed procedure for the setup, operation and shutdown of the process are also described

  9. Innovative boron nitride-doped propellants

    Directory of Open Access Journals (Sweden)

    Thelma Manning

    2016-04-01

    Full Text Available The U.S. military has a need for more powerful propellants with balanced/stoichiometric amounts of fuel and oxidants. However, balanced and more powerful propellants lead to accelerated gun barrel erosion and markedly shortened useful barrel life. Boron nitride (BN is an interesting potential additive for propellants that could reduce gun wear effects in advanced propellants (US patent pending 2015-026P. Hexagonal boron nitride is a good lubricant that can provide wear resistance and lower flame temperatures for gun barrels. Further, boron can dope steel, which drastically improves its strength and wear resistance, and can block the formation of softer carbides. A scalable synthesis method for producing boron nitride nano-particles that can be readily dispersed into propellants has been developed. Even dispersion of the nano-particles in a double-base propellant has been demonstrated using a solvent-based processing approach. Stability of a composite propellant with the BN additive was verified. In this paper, results from propellant testing of boron nitride nano-composite propellants are presented, including closed bomb and wear and erosion testing. Detailed characterization of the erosion tester substrates before and after firing was obtained by electron microscopy, inductively coupled plasma and x-ray photoelectron spectroscopy. This promising boron nitride additive shows the ability to improve gun wear and erosion resistance without any destabilizing effects to the propellant. Potential applications could include less erosive propellants in propellant ammunition for large, medium and small diameter fire arms.

  10. Pengaruh Pendekatan MEAs terhadap Kemampuan Pemecahan Masalah, Komunikasi Matematis, dan Kepercayaan Diri Siswa

    OpenAIRE

    Palupi Sri Wijayanti

    2013-01-01

    Penelitian ini bertujuan untuk mendeskripsikan pengaruh: (1) peringkat sekolah terhadap kemampuan pemecahan masalah siswa, komunikasi matematis, dan kepercayaan diri siswa; (2) pendekatan pembelajaran terhadap kemampuan pemecahan masalah siswa, komunikasi matematis, dan kepercayaan diri siswa; (3) interaksi peringkat sekolah dan pendekatan pembelajaran terhadap kemampuan pemecahan masalah siswa, komunikasi matematis, dan kepercayaan diri siswa. Hasil penelitian menunjukkan bahwa sebagai berik...

  11. PENGARUH KEPEMIMPINAN KEPALA SEKOLAH DAN KOMUNIKASI INTERNAL TERHADAP EFEKTIVITAS KERJA GURU SMK PGRI WONOASRI

    Directory of Open Access Journals (Sweden)

    Ajeng Marga Kusuma

    2017-04-01

    Hasil penelitian menunjukkan 1 ada pengaruh secara parsial kepemimpinan Kepala Sekolah terhadap Efektivitas Kerja Guru SMK PGRI Wonoasri, 2 ada pengaruh secara parsial  komunikasi internal terhadap Efektivitas Kerja Guru SMK PGRI Wonoasri, 3 Ada Pengaruh secara simultan kepemimpinan Kepala Sekolah dan komunikasi internal terhadap efektivitas kerja guru SMK PGRI Wonoasri

  12. Pengaruh Service Quality, Perceived Value, Customer Satisfaction Terhadap Repurchase Intention Pelanggan Di Resto Buro Bar Surabaya

    OpenAIRE

    Hong, Briandy

    2015-01-01

    Purpose: Penelitian ini bertujuan untuk menjelaskan pengaruh service quality terhadap perceived value, pengaruh perceived value terhadap customer satisfaction dan pengaruh customer satisfaction terhadap repurchase intention.Design/methodologi approach: Desain penelitian adalah kausal, dengan satu variabel bebas, yaitu: service quality (X), sedangkan variabel terikat meliputi tiga variabel, yaitu: perceived value (Y1), customer satisfaction (Y2), dan repurchase intention (Y3). Pe...

  13. Pengaruh Customer Experience Dan Kepercayaan Terhadap Kepuasan Konsumen Di Tx Travel Klampis

    OpenAIRE

    Salim, Kenny Febrina; Catherine, Catherine; Andreani, Fransisca

    2015-01-01

    Penelitian ini bertujuan untuk mengetahui pengaruh customer experience dan kepercayaan terhadap kepuasan konsumen yang ada di TX Travel Klampis Surabaya. Penelitian ini menggunakan metode kuantitatif dengan regresi linear berganda. Berdasarkan hasil pengolahan data, dapat disimpulkan bahwa pengaruh customer experience dan kepercayaan terhadap kepuasan konsumen berpengaruh positif dan signifikan, akan tetapi customer experience memiliki pengaruh yang lebih dominan dan signifikan terhadap kepua...

  14. Pengaruh Outdoor Learning Terhadap Kemampuan Berpikir Kritis Matematis Siswa

    Directory of Open Access Journals (Sweden)

    Prima Cristi Crismono

    2017-12-01

    Full Text Available Tujuan penelitian ini untuk mengetahui pengaruh Outdoor Learning terhadap kemampuan berpikir kritis matematis siswa. Hipotesis pada penelitian ini adalah Outdoor Learning berpengaruh dalam meningkatkan kemampuan berpikir kritis matematis siswa. Mengacu pada teori perkembangan kognitifnya penggunaan Outdoor Learning dengan memanfaatkan lingkungan sekitar pada media pembelajaran dan semua aktifitas belajar yang dilakukan oleh siswa di bawah pengawasan dan bimbingan guru. Penggunaan sumber belajar yang bersifat kontektual mampu mengembangkan kemampuan berpikir kritis matematis siswa. Data penelitian dapat diperoleh dengan menggunakan tes yang terdiri dari seperangkat soal uraian untuk mengukur dan mengetahui  kemampuan  awal  matematika  berupa  kemampuan  berpikir  kritis siswa. Hasil analisis pengaruh penerapan metode Outdoor Learning terhadap kemampuan berpikir kritis matematis siswa yang telah dilakukan diketahui bahwa terdapat pengaruh positif penerapan metode Outdoor Learning terhadap kemampuan berpikir kritis matematis siswa. Kesimpulan dari peneitian ini adalah metode Outdoor learning berpengaruh terhadap kemampuan berpikir kritis matematis siswa.

  15. Synthesis of borophenes: Anisotropic, two-dimensional boron polymorphs

    Energy Technology Data Exchange (ETDEWEB)

    Mannix, A. J.; Zhou, X. -F.; Kiraly, B.; Wood, J. D.; Alducin, D.; Myers, B. D.; Liu, X.; Fisher, B. L.; Santiago, U.; Guest, J. R.; Yacaman, M. J.; Ponce, A.; Oganov, A. R.; Hersam, M. C.; Guisinger, N. P.

    2015-12-17

    At the atomic-cluster scale, pure boron is markedly similar to carbon, forming simple planar molecules and cage-like fullerenes. Theoretical studies predict that two-dimensional (2D) boron sheets will adopt an atomic configuration similar to that of boron atomic clusters. We synthesized atomically thin, crystalline 2D boron sheets (i.e., borophene) on silver surfaces under ultrahigh-vacuum conditions. Atomic-scale characterization, supported by theoretical calculations, revealed structures reminiscent of fused boron clusters with multiple scales of anisotropic, out-of-plane buckling. Unlike bulk boron allotropes, borophene shows metallic characteristics that are consistent with predictions of a highly anisotropic, 2D metal.

  16. Development of magnetic resonance technology for noninvasive boron quantification

    International Nuclear Information System (INIS)

    Bradshaw, K.M.

    1990-11-01

    Boron magnetic resonance imaging (MRI) and spectroscopy (MRS) were developed in support of the noninvasive boron quantification task of the Idaho National Engineering Laboratory (INEL) Power Burst Facility/Boron Neutron Capture Therapy (PBF/BNCT) program. The hardware and software described in this report are modifications specific to a GE Signa trademark MRI system, release 3.X and are necessary for boron magnetic resonance operation. The technology developed in this task has been applied to obtaining animal pharmacokinetic data of boron compounds (drug time response) and the in-vivo localization of boron in animal tissue noninvasively. 9 refs., 21 figs

  17. Pendidikan Gizi dengan Media Booklet terhadap Pengetahuan Gizi

    OpenAIRE

    Zulaekah, Siti

    2012-01-01

    Pendidikan gizi pada anak anemia di sekolah dasar diberikan dengan harapan pengetahuan gizi dan pola makan anak akan berubah sehingga asupan makan terutama asupan besi dan kadar hemoglobin anak akan meningkat. Masalah penelitian adalah bagaimanakah efek pendidikan gizi terhadap Perubahan pengetahuan gizi. Penelitian ini bertujuan mempelajari efek pendidikan gizi terhadap Perubahan pengetahuan gizi anak sekolah dasar yang anemia. Penelitian ini merupakan penelitian quasy experiment dengan ranc...

  18. Kajian Kritis Terhadap Praanggapan Metafisis-Epistemologis Kosmologi Stephen Hawking

    Directory of Open Access Journals (Sweden)

    Sindung Tjahyadi

    2008-10-01

    Full Text Available Tulisan ini pada dasarnya merupakan kajian filosofis terhadap suatu "kosmologi ilmiah".Dengan demikian terdapat dua pendekatan yang digunakan,yakni,pertama,hampiran filsafatilmu, terkait dengan aspek-aspek metodologis dari kosmologi ilmiah;dan kedua, hampirankosmologi filsafat, terkait dengan evaluasi kritis atas kosmologi Hawking dalam dimensikosmologi filsafati, terutama berkenaan dengan posisi yang diambinya terhadap unsur hakikipembangun realitas dan peran pengkosmos di dalamnya khususnya terkait dengan konsepruang-wakru, prinsip determinisme, dan hukum kekekalan energi.

  19. PENGARUH PENDEKATAN KONTEKSTUAL TERHADAP HASIL BELAJAR BIOLOGI SISWA SMA

    Directory of Open Access Journals (Sweden)

    Irwandi -

    2013-05-01

    Full Text Available Abstract: Contextual Teaching and Learning and Biology Learning Achievement among Senior High School Students. This quasi experimental study was designed to explain the effects of inquiry learning of Contextual Teaching and Learning (CTL, learning community of CTL, and entry behavior on Biology learning achievement of senior high school students of Bengkulu. The subjects were randomly selected from year-10 classes of eight schools and assigned to eight experimental classes. The study shows that: (1 the inquiry learning of CTL has no effect on the students’ cognitive learning achievement; (2 the learning community, particularly the extended one, of CTL  contributes to the students’ cognitive learning achievement; and (3 the students’ entry behavior did not affect their cognitive learning achievement when the students learned through inquiry process of CTL. Abstrak: Pengaruh Pendekatan Kontekstual terhadap Hasil Belajar Biologi Siswa SMA. Penelitian ini bertujuan untuk mengetahui: 1 pengaruh pendekatan kontekstual melalui strategi inkuiri terhadap hasil belajar kognitif siswa; 2 pengaruh pendekatan kontekstual melalui masyarakat belajar terhadap hasil belajar kognitif siswa; dan 3 pengaruh kemampuan awal siswa terhadap hasil belajar kognitifnya, pada pembela­jaran kontekstual melalui strategi inkuiri tingkat 1 dan 2. Penelitian dilakukan terhadap siswa-siswa pada pembelajaran biologi di 8 buah kelas X, masing-masing dari salah satu SMAN Bengkulu yang dipilih secara random. Penelitian ini menggunakan rancangan kuasi eksperimen Pretest-posttest Nonequivalent Control Group Design dengan rancangan penelitian faktorial 2 x 2 x 2. Hasil penelitian menunjukkan bahwa 1 pendekatan kontekstual melalui strategi inkuiri, tidak berpengaruh terhadap hasil belajar kognitif siswa di SMA 2 pendekatan kontekstual melalui masyarakat belajar berpengaruh terhadap hasil belajar kognitif siswa di SMA di mana hasil belajar kognitif melalui masyarakat belajar

  20. Pengaruh Perilaku Teman Sebaya Terhadap Asertivitas Siswa

    Directory of Open Access Journals (Sweden)

    Ana Mar Atul Hasanah

    2015-04-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui gambaran perilaku teman sebaya, gambaran perilaku asertif siswa, dan adanya pengaruh perilaku teman sebaya terhadap asertivitas siswa. Populasi dalam penelitian ini adalah seluruh siswa SMK se-Kabupaten Rembang dengan sampel berjumlah 334 siswa yang diambil secara cluster proportional random sampling. Metode pengumpulan data menggunakan skala psikologi dan angket. Validitas instrumen menggunakan rumus product moment dan perhitungan reliabilitasnya menggunakan rumus Alpha. Teknik analisis data yang digunakan yaitu analisis deskriptif persentase dan analisis regresi sederhana. Hasil analisis menunjukkan perilaku teman sebaya termasuk dalam kriteria cukup sesuai (65,01% sedangkan perilaku asertif siswa dalam kriteria tinggi (68,46%, dan pengaruh perilaku teman sebaya terhadap asertivitas siswa sebesar 4,31%. Simpulan dari penelitian ini yaitu adanya pengaruh perilaku teman sebaya terhadap asertivitas siswa. This study is aimed to find out the description of peer’s behavior, the description of the students’ assertive behavior, and the influence of peer’s behavior towards the students’ assertiveness. The populations in this study were all students of Vocational Schools in Rembang regency with samples of 334 students obtained by cluster proportional random sampling. The methods for collecting data used in this study were psychological scale and questionnaire. The validity of the instrument used product moment formula and the reliability calculation used Alpha formula. The techniques for analyzing the data were percentage descriptive analysis and simple regression analysis. The result of the analysis showed that the peer’s behavior belonged to sufficient enough criteria (65.01% whereas the students’ assertive behavior was in high criteria (68.46% and the influence of the peer’s behavior towards the students’ assertive behavior was 4.31%. The conclusion of this study is that there is a

  1. Proceedings of workshop on 'boron science and boron neutron capture therapy'

    Energy Technology Data Exchange (ETDEWEB)

    Kitaoka, Y. [ed.

    1998-12-01

    This volume contains the abstracts and programs of the 8th (1996), 9th (1997) and 10th (1998) of the workshop on 'the Boron Science and Boron Neutron Capture Therapy' and the recent progress reports especially subscribed. The 11 of the presented papers are indexed individually. (J.P.N.)

  2. The effect of boron deficiency on gene expression and boron compartmentalization in sugarbeet

    Science.gov (United States)

    NIP5, BOR1, NIP6, and WRKY6 genes were investigated for their role in boron deficiency in sugar beet, each with a proposed role in boron use in model plant species. All genes showed evidence of polymorphism in fragment size and gene expression in the target genomic DNA and cDNA libraries, with no co...

  3. Research of boron conversion coating in neutron detector with boron deposited GEM

    International Nuclear Information System (INIS)

    Ye Di; Sun Zhijia; Zhou Jianrong; Wang Yanfeng; Yang Guian; Xu Hong; Chen Yuanbai; Xiao Yu; Diao Xungang

    2014-01-01

    GEM is a flourishing new gas detector and nowadays its technology become more mature. It has outstanding properties, such as excellent position resolution, high counting rate, radiation resistance, simple and flexible signal readout, can be large-area detector, wide application range. Detector with boron deposited GEM uses multilayer GEM with deposited boron film as neutron conversion carrier which reads out the information of neutron shot from the readout electrode with gas amplification from every GEM layer. The detector is high performance which can meet the demands of neutron detector of a new generation. Boron deposited neutron conversion electrode with boron deposited cathode and GEM included is the core part of the detector. As boron is a high-melting-point metalloid (> 2 000 ℃), electroplating and thermal evaporation are inappropriate ways. So finding a way to deposit boron on electrode which can meet the demands become a key technology in the development of neutron detector with boron deposited GEM. Compared with evaporation, sputtering has features such as low deposition temperature, high film purity, nice adhesive, thus is appropriate for our research. Magnetron sputtering is a improved way of sputtering which can get lower sputtering air pressure and higher target voltage, so that we can get better films. Through deposit process, the research uses magnetron sputtering to deposit pure boron film on copper electrode and GEM film. This method can get high quality, nice adhere, high purity, controllable uniformity, low cost film with high speed film formation. (authors)

  4. The study of high-boron steel and high-boron cast iron used for shield

    International Nuclear Information System (INIS)

    Pan Xuerong; Lu Jixin; Wen Yaozeng; Wang Zhaishu; Cheng Jiantin; Cheng Wen; Shun Danqi; Yu Jinmu

    1996-12-01

    The smelting, forging, heat-treatment technology and the mechanical properties of three kinds of high-boron steels (type 1: 0.5% boron; type 2: 0.5% boron and 4% or 2% nickel; type 3: 0.5% boron, 0.5% nickel and 0.5% molybdenum) were studied. The test results show that the technology for smelting, forging and heat-treatment (1050 degree C/0.5 h water cooled + 810 degree C/1 h oil cooled) in laboratory is feasible. Being sensitive to notch, the impact toughness of high-boron steel type 1 is not steady and can not meet the technology requirements on mechanical properties. The mechanical properties of both high-boron steel type 2 and type 3 can meet the technological requirements. The smelting technology of high-boron casting iron containing 0.5% boron was researched. The tests show that this casting iron can be smelted in laboratory and its properties can basically satisfy the technology requirements. (10 refs., 6 figs., 11 tab.)

  5. Real-time boronization in PBX-M using erosion of solid boronized targets

    International Nuclear Information System (INIS)

    Kugel, H.W.; Timberlake, J.; Bell, R.; LeBlanc, B.; Okabayashi, M.; Paul, S.; Tighe, W.; Hirooka, Y.

    1994-11-01

    Thirty one real-time boronizations were applied to PBX-M using the plasma erosion of solid target probes. More than 17 g of boron were deposited in PBX-M using this technique. The probes were positioned at the edge plasma to optimize vaporization and minimize spallation. Auger depth profile analysis of poloidal and toroidal deposition sample coupon arrays indicate that boron was transported by the plasma around the torus and deep into the divertors. During discharges with continuous real-time boronization, low-Z and high-Z impurities decreased rapidly as plasma surfaces were covered during the first 20-30 discharges. After boronization, a short-term improvement in plasma conditions persisted prior to significant boron erosion from plasma surfaces, and a longer term, but less significant improvement persisted as boron farther from the edge continued gettering. Real-time solid target boronization has been found to be very effective for accelerating conditioning to new regimes and maintaining high performance plasma conditions

  6. ANALISIS PENGARUH PERUBAHAN EARNINGS DAN RISIKO PASAR TERHADAP STRUKTUR MODAL

    Directory of Open Access Journals (Sweden)

    Endi Sarwoko

    2006-05-01

    Full Text Available Penelitian ini bertujuan untuk menguji perbedaan rata-rata struktur modal antar industri, menguji pengaruh perubahan earnings perusahaan terhadap struktur modal, dan menguji pengaruh risiko pasar dengan struktur modal perusahaan. Struktur modal dalam penelitian ini diproksikan dengan debt to equity ratio dan debt to total assets. Data diperoleh dari Pojok Bursa Efek Jakarta (BEJ Universitas Brawijaya, sampel sebanyak 40 perusahaan yang diambil secara Purposive dengan kriteria perusahaan-perusahaan tersebut aktif mencatatkan laporan keuangannya di BEJ dan aktif melakukan perdagangan saham selama 6 tahun terakhir. Hasil analisis menunjukkan bahwa terdapat pengaruh terbalik antara perubahan earnings perusahaan terhadap D/E tetapi perubahan earnings ternyata tidak berpengaruh signifikan terhadap D/A. Risiko pasar tidak berpengaruh signifikan terhadap debt to equity, hasil ini menunjukkan bahwa ketika akan melakukan pembelian saham investor tidak mempertimbangkan risiko pasar. Sedangkan berdasarkan pengaruh terhadap D/A diperoleh hasil risiko pasar berpengaruh signifikan terhadap debt to total assets,  manajemen perusahaan sangat memperhatikan dampak risiko pasar dalam menentukan kebijakan struktur modal perusahaan, karena dalam memberikan pinjaman kreditur biasanya sangat mempertimbangkan aset yang dimiliki perusahaan didanai dari mana, hutang atau modal sendiri.

  7. Ceramic silicon-boron-carbon fibers from organic silicon-boron-polymers

    Science.gov (United States)

    Riccitiello, Salvatore R. (Inventor); Hsu, Ming-Ta S. (Inventor); Chen, Timothy S. (Inventor)

    1993-01-01

    Novel high strength ceramic fibers derived from boron, silicon, and carbon organic precursor polymers are discussed. The ceramic fibers are thermally stable up to and beyond 1200 C in air. The method of preparation of the boron-silicon-carbon fibers from a low oxygen content organosilicon boron precursor polymer of the general formula Si(R2)BR(sup 1) includes melt-spinning, crosslinking, and pyrolysis. Specifically, the crosslinked (or cured) precursor organic polymer fibers do not melt or deform during pyrolysis to form the silicon-boron-carbon ceramic fiber. These novel silicon-boron-carbon ceramic fibers are useful in high temperature applications because they retain tensile and other properties up to 1200 C, from 1200 to 1300 C, and in some cases higher than 1300 C.

  8. A quantitative comparison between electrocoagulation and chemical coagulation for boron removal from boron-containing solution

    International Nuclear Information System (INIS)

    Yilmaz, A. Erdem; Boncukcuoglu, Recep; Kocakerim, M. Muhtar

    2007-01-01

    This paper provides a quantitative comparison of electrocoagulation and chemical coagulation approaches based on boron removal. Electrocoagulation process delivers the coagulant in situ as the sacrificial anode corrodes, due to a fixed current density, while the simultaneous evolution of hydrogen at the cathode allows for pollutant removal by flotation. By comparison, conventional chemical coagulation typically adds a salt of the coagulant, with settling providing the primary pollutant removal path. Chemical coagulation was carried out via jar tests using aluminum chloride. Comparison was done with the same amount of coagulant between electrocoagulation and chemical coagulation processes. Boron removal obtained was higher with electrocoagulation process. In addition, it was seen that chemical coagulation has any effect for boron removal from boron-containing solution. At optimum conditions (e.g. pH 8.0 and aluminum dose of 7.45 g/L), boron removal efficiencies for electrocoagulation and chemical coagulation were 94.0% and 24.0%, respectively

  9. A quantitative comparison between electrocoagulation and chemical coagulation for boron removal from boron-containing solution

    Energy Technology Data Exchange (ETDEWEB)

    Yilmaz, A. Erdem [Atatuerk University, Faculty of Engineering, Department of Environmental Engineering, 25240 Erzurum (Turkey)], E-mail: aerdemy@atauni.edu.tr; Boncukcuoglu, Recep [Atatuerk University, Faculty of Engineering, Department of Environmental Engineering, 25240 Erzurum (Turkey); Kocakerim, M. Muhtar [Atatuerk University, Faculty of Engineering, Department of Chemical Engineering, 25240 Erzurum (Turkey)

    2007-10-22

    This paper provides a quantitative comparison of electrocoagulation and chemical coagulation approaches based on boron removal. Electrocoagulation process delivers the coagulant in situ as the sacrificial anode corrodes, due to a fixed current density, while the simultaneous evolution of hydrogen at the cathode allows for pollutant removal by flotation. By comparison, conventional chemical coagulation typically adds a salt of the coagulant, with settling providing the primary pollutant removal path. Chemical coagulation was carried out via jar tests using aluminum chloride. Comparison was done with the same amount of coagulant between electrocoagulation and chemical coagulation processes. Boron removal obtained was higher with electrocoagulation process. In addition, it was seen that chemical coagulation has any effect for boron removal from boron-containing solution. At optimum conditions (e.g. pH 8.0 and aluminum dose of 7.45 g/L), boron removal efficiencies for electrocoagulation and chemical coagulation were 94.0% and 24.0%, respectively.

  10. Biodistribution, toxicity and efficacy of a boronated porphyrin for boron neutron capture therapy

    International Nuclear Information System (INIS)

    Miura, Michiko; Micca, P.; Fairchild, R.; Slatkin, D.; Gabel, D.

    1992-01-01

    Boron-containing porphyrins may be useful for boron neutron capture therapy (BNCT) in the treatment of brain tumors. Porphyrins have been shown to accumulate in tumor tissue and to be essentially excluded from normal brain. However, problems of toxicity may prevent some boron-containing porphyrins from being considered for BNCT. The authors have synthesized the boronated porphyrin 2,4-bis-vinyl-o-nidocarboranyl-deuteroporphyrin IX (VCDP). Preliminary studies in tumor-bearing mice showed considerable uptake of boron at a total dose of 150 μg/gbw with low mortality. They now report that a total dose to mice of ∼ 275 μg VCDP/gbw administered in multiple intraperitoneal (ip) injections can provide 40-50μg B per gram of tumor with acceptable toxicity. Toxicity experiments and a preliminary trial of BNCT in mice given such doses are also reported

  11. Teori Kepemimpinan Sifat

    OpenAIRE

    Marianti, Maria Merry

    2009-01-01

    Leadership is the ability to influence a group toward the achievement of a vision or a set of goals. There are three groups of Leadership theories: trait theories, behavioral theories, and contingency theories. Trait theories of leadership differentiate leaders from non-leaders by focusing on personal qualities and characteristics. This paper focuses on trait theories of leadership. This theory is based on characteristics of many leaders - both successful and unsuccessful - and is used to pr...

  12. Redistribution of boron in leaves reduces boron toxicity.

    Science.gov (United States)

    Reid, Robert J; Fitzpatrick, Kate L

    2009-11-01

    High soil boron (B) concentrations lead to the accumulation of B in leaves, causing the development of necrotic regions in leaf tips and margins, gradually extending back along the leaf. Plants vary considerably in their tolerance to B toxicity, and it was recently discovered that one of the tolerance mechanisms involved extrusion of B from the root. Expression of a gene encoding a root B efflux transporter was shown to be much higher in tolerant cultivars. In our current research we have shown that the same gene is also upregulated in leaves. However, unlike in the root, the increased activity of the B efflux transporter in the leaves cannot reduce the tissue B concentration. Instead, we have shown that in tolerant cultivars, these transporters redistribute B from the intracellular phase where it is toxic, into the apoplast which is much less sensitive to B. These results provide an explanation of why different cultivars with the same leaf B concentrations can show markedly different toxicity symptoms. We have also shown that rain can remove a large proportion of leaf B, leading to significant improvements of growth of both leaves and roots.

  13. Boron-containing thioureas for neutron capture therapy

    International Nuclear Information System (INIS)

    Ketz, H.

    1993-01-01

    Melanin is produced in large amounts in malignant melanotic melanomas. Because thiourea compounds are covalently incorporated into melanin during its biosynthesis, the preparation of boronated thiourea-derivatives is of particular interest for the BNCT (Boron Neutron Capture Therapy). Accumulation of boron in tumors by means of boronated thiourea-derivatives may therefore provide levels of 10 B which are useful for BNCT. In BNCT the tumor containing the boron compound is irradiated with epithermal neutrons to generate He- and Li-nuclei from the 10 B which can then destroy the tumor cells. Because of the short ranges of these particles (approximately one cell diameter) the damage will be almost exclusively confined to the tumor leaving normal tissue unharmed. High accumulation of 2-mercapto-1-methylimidazole (methimazole) in melanotic melanomas has been described in the literature. Boronated derivatives of methimazole were therefore synthesized. Boron was in the form of a boronic acid, a nido-carbonate and a mercaptoundeca hydro-closo-dodecaborate (BSH). The synthesis of the boron cluster derivatives of methimazole (nido-carborate- and BSH-derivatives) with 9 resp. 12 boron atoms in the molecule were expected to achieve higher concentrations of boron in the tumor than in the case of the boronic acid compound with its single boron atom. (orig.) [de

  14. ANALISIS PERUBAHAN PENGGUNAAN LAHAN DAN DAMPAKNYA TERHADAP HASIL AIR DI DAS CISADANE HULU

    Directory of Open Access Journals (Sweden)

    Nilda Nilda

    2015-08-01

    Full Text Available Air merupakan salah satu kebutuhan dasar yang sangat penting bagi manusia. Terdapat beberapa faktor utama penyebab perubahan sumber daya air, diantaranya adalah perubahan penutupandan pengelolaan lahan yang meningkatkan kekedapan lahan.Salah satu tujuan pengelolaan DAS adalah mencapai kondisi tata air optimal yang dapat dikenali dari sifat aliran sungai. Penelitian ini bertujuan untuk: (1 mengetahui distribusi perubahan penggunaan lahan yang terjadi di wilayah DAS Cisadane Hulu dari tahun 2003 sampai 2010; (2 mengetahui perubahan hasil air akibat distribusi perubahan penggunaan lahan. Daerah kajian penelitian adalah DAS Cisadane Hulu dengan luasan sekitar 22.288,01 ha. Penelitian dilakukan melalui dua tahap yaitu analisis perubahan penggnaan lahan dan prediksi aliran dengan model HEC-HMS. Dalam penelitian ini digunakan peta pengunaan lahan dari BIG (Badan Informasi Geospasial tahun 2003 dan Peta Penggunaan Lahan tahun 2010 hasil interpretasi Citra ALOS. Selanjutnya kedua peta tersebut dianalisis dengan metoda tabel silang (cross tabel untuk memperoleh data perubahan penggunaan lahan dari setiap kelas penggunaannya. Kedua data series penggunaan lahan ini digunakan sebagai input pada model prediksi debit aliran HEC-HMS. Selanjutnya dibangun juga skenario-skenario untuk melihat dampak perubahan lahan terhadap debit aliran di DAS Cisadane Hulu. Metode bilangan kurva (SCS-CN dipilih untuk menghitung besar curah hujan efektif, yaitu dari pengurangan curah hujan bruto dengan berbagai bentuk kehilangan air (loss. Transformasi dari curah hujan efektif menjadi hidrograf aliran langsung (direct runoff diperoleh dengan menggunakan metode hidrograf satuan SCS Curve Number. Selama kurun waktu 2003 – 2010 terjadi perubahan penggunaan lahan di DAS Cisadane Hulu. Luas Hutan bertambah 223,78 ha, pemukiman 214,78 ha, rumput/tanah kosong 85, 73 ha, dan gedung 12, 64 ha. Terjadi penguarangan luas semak belukar 225,64 ha, tegalan/ladang 145,92 ha, sawah irigasi 124

  15. Boron removal in radioactive liquid waste by forward osmosis membrane

    Energy Technology Data Exchange (ETDEWEB)

    Doo Seong Hwang; Hei Min Choi; Kune Woo Lee; Jei Kwon Moon [KAERI, Daejeon (Korea, Republic of)

    2013-07-01

    This study investigated the treatment of boric acid contained in liquid radioactive waste using a forward osmosis membrane. The boron permeation through the membrane depends on the type of membrane, membrane orientation, pH of the feed solution, salt and boron concentration in the feed solution, and osmotic pressure of the draw solution. The boron flux begins to decline from pH 7 and increases with an increase of the osmotic driving force. The boron flux decreases slightly with the salt concentration, but is not heavily influenced by a low salt concentration. The boron flux increases linearly with the concentration of boron. No element except for boron was permeated through the FO membrane in the multi-component system. The maximum boron flux is obtained in an active layer facing a draw solution orientation of the CTA-ES membrane under conditions of less than pH 7 and high osmotic pressure. (authors)

  16. 15th International Conference on Boron Chemistry (IMEBORON XV)

    Czech Academy of Sciences Publication Activity Database

    Grüner, Bohumír; Štíbr, Bohumil

    2015-01-01

    Roč. 87, č. 2 (2015), s. 121 ISSN 0033-4545 Institutional support: RVO:61388980 Keywords : boranes * boron * boron materials * carboranes * IMEBORON XV * medicinal chemistry Subject RIV: CA - Inorganic Chemistry

  17. Structure prediction of boron-doped graphene by machine learning

    Science.gov (United States)

    M. Dieb, Thaer; Hou, Zhufeng; Tsuda, Koji

    2018-06-01

    Heteroatom doping has endowed graphene with manifold aspects of material properties and boosted its applications. The atomic structure determination of doped graphene is vital to understand its material properties. Motivated by the recently synthesized boron-doped graphene with relatively high concentration, here we employ machine learning methods to search the most stable structures of doped boron atoms in graphene, in conjunction with the atomistic simulations. From the determined stable structures, we find that in the free-standing pristine graphene, the doped boron atoms energetically prefer to substitute for the carbon atoms at different sublattice sites and that the para configuration of boron-boron pair is dominant in the cases of high boron concentrations. The boron doping can increase the work function of graphene by 0.7 eV for a boron content higher than 3.1%.

  18. Boron: out of the sky and onto the ground

    International Nuclear Information System (INIS)

    Kuehl, D.K.

    1975-01-01

    Now an accepted, engineered material for aerospace applications, boron is taking its place on the ground. Both current production applications, prototype (development) applications, and speculative applications abound. In the leisure product market, boron epoxy or boron aluminum has been used or tried in golf clubs (in combination with graphite epoxy or to reinforce aluminum or steel), in tennis racquets, in bicycles, racing shells, skis and skipoles, bows and arrows, and others. In the industrial area, boron has been used to reduce fatigue, increase stiffness, or for its abrasive properties. Textile machinery, honing tools, and cut off wheels or saws are among the applications. In the medical field, prosthetics and orthotic braces, wheel chairs, canes, and crutches are all good applications for boron. Applications for boron in transportation, construction, and heavy industry are also possible. The volume of boron used in these applications could have a major impact on prices, making boron composite parts cost competitive with conventional materials. (U.S.)

  19. The Influence of Parameters Affecting Boron Removal by Electrocoagulation Process

    KAUST Repository

    Zeboudji, B.; Drouiche, Nadjib; Lounici, Hakim; Mameri, Nabil; Ghaffour, NorEddine

    2013-01-01

    , this process requires chemical addition and important additional investment, operation and maintenance, and energy costs. Electrocoagulation (EC) process can be used to achieve such low boron concentration. In this work, the removal of boron from aqueous

  20. KEPRIBADIAN DOSEN YANG BERPENGARUH TERHADAP PRESTASI BELAJAR

    Directory of Open Access Journals (Sweden)

    Vicky Dwi Saputra

    2012-09-01

    Full Text Available Penelitian ini bertujuan untuk menentukan faktor yang menyebabkan penurunan prestasi belajar mahasiswa di Fakultas Ekonomi dan Bisnis Universitas Diponegoro dan menganalisis pengaruh kepribadian dosen terhadap prestasi belajar mahasiswa. Data penelitian dikumpulkan dari 100 mahasiswa program Akuntansi, Manajemen, dan Ilmu Ekonomi Studi Pembangunan  yang memiliki jangka waktu minimal lima semester studi. Pertanyaan-pertanyaan dengan menggunakan kuesioner diberikan melalui teknik purposive sampling. Jenis sampling yang digunakan adalah kuota sampling, kemudian dianalisis dengan menggunakan regresi berganda dan nilai jangka indeks menggunakan SPSS 16. Hasil analisis menunjukkan bahwa semua jenis kepribadian empat (optimis, mudah tersinggung, melankolis dan apatis memiliki dampak positif dan signifikan terhadap prestasi belajar. Dengan pengaruh 43,3% sedangkan 56,7% dipengaruhi oleh variabel lain.This study aimed to determine factor causing degradation of achievement learn student in Faculty of Economics and Business University Diponegoro and analyse influence personality of lecturer to achievement learn student. Research data collected from 100 students in the program of Accounting, Management, and IESP (Economics of Development Studies that has minimal period of five semesters of study. The questions using a questionnaire administered through purposive sampling technique. The type of sampling that used was quota sampling, then analyzed using multiple regression and the value of the index run with SPSS 16. The analysis showed that all four personality types (sanguine, choleric, melancholic and phlegmatic has a positive and significant impact on learning achievement. With the influence of 43.3% while 56.7% are influenced by other variables

  1. PENGARUH TINGKAT DISCLOSURE TERHADAP BIAYA EKUITAS

    Directory of Open Access Journals (Sweden)

    Juniarti Juniarti

    2003-01-01

    Full Text Available The purpose of this research is to examine the effect of disclodure level to cost of equity and the significancy of the influence to companies with bluechips and nonbluechips stock. Thirty listed companies in Jakarta Stock Exchange (JSX selected based on certain criteria were used as research sample. Data are collected from documentation of financial statements and are analyzed by using statistical tool i.e. multiple regression. This research indicate that there is significant influence of disclosure level to cost of equity. However, this research cannot prove that there is a significant different of the influence of disclosure level to cost of equity to the companies with bluechips and nonbluechips stocks. Abstract in Bahasa Indonesia : Penelitian ini bertujuan untuk menguji pengaruh tingkat disclosure terhadap biaya ekuitas dan signifikansi pengaruh tersebut pada perusahaan yang sahamnya tergolong sebagai saham bluechip dan non-bluechip. Sebanyak tiga puluh perusahaan yang terdaftar pada Bursa Efek Jakarta (BEJ yang memenuhi kriteria yang ditetapkan diambil sebagai sampel. Pengumpulan data dilakukan dengan cara mengambil dokumentasi laporan keuangan dari Bursa Efek Jakarta (BEJ dan diolah dengan menggunakan uji statistik regresi berganda. Penelitian ini membuktikan bahwa terdapat pengaruh yang signifikan tingkat disclosure terhadap biaya ekuitas. Namun penelitian ini gagal untuk membuktikan akan adanya perbedaan signifikansi pengaruh tingkat disclosure pada biaya hutang pada perusahaan yang sahamnya tergolong sebagai saham bluechip dan nonbluechip. Kata kunci: Disclosure, Biaya ekuitas.

  2. Boron Removal in Seawater Reverse Osmosis System

    KAUST Repository

    Rahmawati, Karina

    2011-07-01

    Reverse osmosis successfully proves to remove more than 99% of solute in seawater, providing fresh water supply with satisfied quality. Due to some operational constraints, however, some trace contaminants removal, such as boron, cannot be achieved in one pass system. The stringent criterion for boron from World Health Organization (WHO) and Saudi Arabia local standard (0.5 mg/l) is hardly fulfilled by single pass sea water reverse osmosis (SWRO) plants. Some design processes have been proposed to deal with boron removal, but they are not economically efficient due to high energy and chemical consumption. The objective of this study was to study boron removal by different reverse osmosis membranes in two pH conditions, with and without antiscalant addition. Thus, it was expected to observe the possibility of operating single pass system and necessity to operate two pass system using low energy membrane. Five membrane samples were obtained from two different manufacturers. Three types of feed water pH were used, pH 8, pH 10, and pH 10 with antiscalant addition. Experiment was conducted in parallel to compare membrane performance from two manufacturers. Filtration was run with fully recycle mode for three days. Sample of permeate and feed were taken every 12 hours, and analyzed for their boron and TDS concentration. Membrane samples were also tested for their surface charge. The results showed that boron rejection increases as the feed pH increases. This was caused by dissociation of boric acid to negatively charged borate ion and more negatively charged membrane surface at elevated pH which enhance boron rejection. This study found that single pass reverse osmosis system, with and without elevating the pH, may not be possible to be applied because of two reasons. First, permeate quality in term of boron, does not fulfill WHO and local Saudi Arabia regulations. Second, severe scaling occurs due to operation in alkaline condition, since Ca and Mg concentration are

  3. Pengaruh Kerapatan Vegetasi Penutup Lahan terhadap Karakteristik Resesi Hidrograf pada Beberapa Subdas di Propinsi Jawa Tengah Dan Propinsi DIY

    Directory of Open Access Journals (Sweden)

    Bokiraiya Latuamury

    2016-10-01

    Full Text Available ABSTRAK Penelitian ini dilakukan di Propinsi Jawa Tengah dan Propinsi DIY, dilatarbelakangi oleh penurunan daya dukung lingkungan seperti rusaknya kawasan hutan dan berkurangnya luas tutupan lahan hutan, yang dapat mempengaruhi perilaku aliran air. Dengan adanya perubahan tutupan lahan akan berdampak pada berubahnya sifat-sifat hidrologi seperti koefisien aliran, debit dan karakteristik hidrograf aliran. Indikator kerusakan hutan dapat dilihat dari karakteristik hidrograf. Evaluasi respon DAS berupa hidrograf aliran akibat adanya perubahan penutup lahan menjadi sangat penting untuk dianalisis karena merupakan tolok ukur dalam setiap penentuan kebijakan terkait dengan penanganan banjir dan tanah longsor. Oleh karena itu, penelitian ini bertujuan untuk (1. mengkaji karakteristik kerapatan vegetasi penutup lahan dan keterkaitannya dalam ekosistem DAS, (2. mengkaji karakteristik aliran dasar (koefisien resesi  pada beberapa sub-DAS tersebut, dan (3. menganalisis pengaruh kerapatan vegetasi penutup lahan terhadap karakteristik hidrograf aliran khususnya aliran dasar pada sub DAS yang diteliti. Metode penelitian yang digunakan adalah metode survei data sekunder pada rekaman data AWLR/SPAS untuk analisis resesi hidrograf dan koefisien resesi (Krb, dan interpretasi citra Landsat ETM+ untuk transformasi indeks vegetasi NDVI dikorelasikasi dengan data kerapatan vegetasi untuk mempresentasikan karakteristik kerapatan vegetasi. Selanjutnya hasil transformasi indeks vegetasi NDVI kemudian diujikorelasikan dengan karakteristik resesi (koefisien resesi untuk menganalisis pengaruh kerapatan vegetasi penutup lahan terhadap karakteristik resesi hidrograf. Hasil uji statistik NDVI dengan koefisien resesi menunjukkan terdapatnya korelasi antara nilai NDVI dan koefisien resesi pada R2 = 0,1427, F = 2.17 tidak berpengaruh nyata pada taraf signifikan 1% sebesar 0.1646 (lampiran 1.2b. Analisis korelasi antara variabel independen (NDVI penutup lahan dengan variabel

  4. Boron tolerance in NS wheat lines

    Directory of Open Access Journals (Sweden)

    Brdar Milka

    2006-01-01

    Full Text Available Boron is an essential micronutrient for higher plants. Present in excessive amounts boron becomes toxic and can limit plant growth and yield. Suppression of root growth is one of the symptoms of boron toxicity in wheat. This study was undertaken to investigate the response of 10 perspective NS lines of wheat to high concentrations of boron. Analysis of root growth was done on young plants, germinated and grown in the presence of different concentrations of boric acid (0, 50,100 and 150 mg/1. Significant differences occurred between analyzed genotypes and treatments regarding root length. Average suppression of root growth was between 11,6 and 34,2%, for line NS 252/02 are even noted 61,4% longer roots at treatments in relation to the control. Lines with mean suppression of root growth less than 20% (NS 101/02, NS 138/01, NS 53/03 and NS 73/02 may be considered as boron tolerant. Spearmans coefficients showed high level of agreement regarding rang of root length for genotypes treated with 100 and 150 mg H3BO3/l.

  5. Hot ductility behavior of boron microalloyed steels

    International Nuclear Information System (INIS)

    Lopez-Chipres, E.; Mejia, I.; Maldonado, C.; Bedolla-Jacuinde, A.; Cabrera, J.M.

    2007-01-01

    The current study analyses the influence of boron contents (between 29 and 105 ppm) on the hot ductility of boron microalloyed steels. For this purpose, hot tensile tests were carried out at different temperatures (700, 800, 900 and 1000 deg. C) at a constant true strain rate of 0.001 s -1 . In general, results revealed an improvement of the hot ductility of steels at increasing boron content. At 700, 900 and 1000 deg. C the ductility is higher than at 800 deg. C, where boron microalloyed steels exhibit a region of ductility loss (trough region). Likewise, dynamic recrystallization only occurred at 900 and 1000 deg. C. The fracture surfaces of the tested steels at temperatures giving the high temperature ductility regime show that the fracture mode is a result of ductile failure, whereas it is ductile-brittle failure in the trough region. Results are discussed in terms of dynamic recrystallization and boron segregation towards austenite grain boundaries, which may retard the formation of pro-eutectoid ferrite and increase grain boundary cohesion

  6. Technology of boron-containing polyphosphate fertilizer 'Phosphobor'

    International Nuclear Information System (INIS)

    Aldabergenov, M.K.; Balakaeva, T.G.

    1995-01-01

    A technology is developed for producing 'Phosphobor' fertilizer based on the rock phosphate weal (17-18% P 2 O 5 ) with additions of boron-magnesium compound. Boron is part of polyphosphate fertilizer in the form of polymeric compounds of phosphorus and boron. Phosphorus and boron copolymers -boratophosphates - are easily formed in the process of polyphosphate fertilizers production, since borates undergo a mutual polycondensation reaction with phosphates. 8 refs., 1 fig

  7. Determination of free carbon content in boron carbide ceramic powders

    International Nuclear Information System (INIS)

    Castro, A.R.M. de; Lima, N.B. de; Paschoal, J.O.A.

    1990-01-01

    Boron carbide is a ceramic material of technological importance due to its hardness and high chemical and thermal stabilities. Free carbon is always found as a process dependent impurity in boron carbide. The development of procedures for its detection is required because its presence leads to a degradation of the boron carbide properties. In this work, several procedures for determining free carbon content in boron carbide specimens are reported and discussed for comparison purposes. (author) [pt

  8. Screening of Wheat Genotypes for Boron Efficiency in Bangladesh

    Science.gov (United States)

    A number of Bangladeshi wheat genotypes (varieties and advanced lines) have been tested for boron efficiency through sand culture experiments over two years (2007-08 & 2008-09) against two Thai check varieties ‘Fang 60’ (boron efficient) and ‘SW41’ (boron inefficient). Performances of the genotypes ...

  9. The effects of boron management on soil microbial population and ...

    African Journals Online (AJOL)

    Soil microorganisms directly influence boron content of soil as maximum boron release corresponds with the highest microbial activity. The objective of this study is to determine the effects of different levels of boron fertilizer on microbial population, microbial respiration and soil enzyme activities in different soil depths in ...

  10. Oxidation of boron carbide at high temperatures

    International Nuclear Information System (INIS)

    Steinbrueck, Martin

    2005-01-01

    The oxidation kinetics of various types of boron carbides (pellets, powder) were investigated in the temperature range between 1073 and 1873 K. Oxidation rates were measured in transient and isothermal tests by means of mass spectrometric gas analysis. Oxidation of boron carbide is controlled by the formation of superficial liquid boron oxide and its loss due to the reaction with surplus steam to volatile boric acids and/or direct evaporation at temperatures above 1770 K. The overall reaction kinetics is paralinear. Linear oxidation kinetics established soon after the initiation of oxidation under the test conditions described in this report. Oxidation is strongly influenced by the thermohydraulic boundary conditions and in particular by the steam partial pressure and flow rate. On the other hand, the microstructure of the B 4 C samples has a limited influence on oxidation. Very low amounts of methane were produced in these tests

  11. The ternary system nickel-boron-silicon

    International Nuclear Information System (INIS)

    Lugscheider, E.; Reimann, H.; Knotek, O.

    1975-01-01

    The ternary system Nickel-Boron-Silicon was established at 850 0 C by means of X-ray diffraction, metallographic and micro-hardness examinations. The well known binary nickel borides and silicides resp. were confirmed. In the boron-silicon system two binary phases, SiBsub(4-x) with x approximately 0.7 and SiB 6 were found the latter in equilibrium with the β-rhombohedral boron. Confirming the two ternary silicon borides a greater homogeneity range was found for Ni 6 Si 2 B, the phase Nisub(4,6)Si 2 B published by Uraz and Rundqvist can better be described by the formula Nisub(4.29)Si 2 Bsub(1.43). In relation to further investigations we measured melting temperatures in ternary Ni-10 B-Si alloys by differential thermoanalysis. (author)

  12. Depth resolved investigations of boron implanted silicon

    Science.gov (United States)

    Sztucki, M.; Metzger, T. H.; Milita, S.; Berberich, F.; Schell, N.; Rouvière, J. L.; Patel, J.

    2003-01-01

    We have studied the depth distribution and structure of defects in boron implanted silicon (0 0 1). Silicon wafers were implanted with a boron dose of 6×10 15 ions/cm -2 at 32 keV and went through different annealing treatments. Using diffuse X-ray scattering at grazing incidence and exit angles we are able to distinguish between different kinds of defects (point defect clusters and extrinsic stacking faults on {1 1 1} planes) and to determine their depth distribution as a function of the thermal budget. Cross-section transmission electron microscopy was used to gain complementary information. In addition we have determined the strain distribution caused by the boron implantation as a function of depth from rocking curve measurements.

  13. Radiation hardening of MOS devices by boron

    International Nuclear Information System (INIS)

    Danchenko, V.

    1975-01-01

    A novel technique is disclosed for radiation hardening of MOS devices and specifically for stabilizing the gate threshold potential at room temperature of a radiation subjected MOS field-effect device of the type having a semiconductor substrate, an insulating layer of oxide on the substrate, and a gate electrode disposed on the insulating layer. In the preferred embodiment, the novel inventive technique contemplates the introduction of boron into the insulating oxide, the boron being introduced within a layer of the oxide of about 100A to 300A thickness immediately adjacent the semiconductor-insulator interface. The concentration of boron in the oxide layer is preferably maintained on the order of 10 atoms/ cm 3 . The novel technique serves to reduce and substantially annihilate radiation induced positive gate charge accumulations, which accumulations, if not eliminated, would cause shifting of the gate threshold potential of a radiation subjected MOS device, and thus render the device unstable and/or inoperative. (auth)

  14. BC-454 boron-loaded plastic scintillator

    International Nuclear Information System (INIS)

    Bellian, J.G.

    1984-01-01

    Prototype samples of plastic scintillators containing up to 10% by weight of natural boron have been produced. The maximum size scintillators made to date are 28 mm dia. x 100 mm long. Rods containing up to 2% boron are now made routinely and work is progressing on higher concentrations. The plastics are clear and emit the same blue fluorescence as other common plastic scintillators. It is expected that rods up to 3'' dia. containing 5% boron will be produced during the next few months. BC-454 is particularly useful in neutron research, materials studies, some types of neutron dosimetry, and monitoring of medium to high energy neutrons in the presence of other types radiation. It combines attractive features that enhance its usefulness to the physics community

  15. On the Mechanism of Boron Ignition

    Science.gov (United States)

    Keil, D. G.; Dreizin, E. L.; Felder, W.; Vicenzi, E. P.

    1997-01-01

    Boron filaments were electrically heated in air and argon/oxygen mixtures while their resistance, temperature, and radiation at the wavelengths of BO and BO2 bands were monitored. The filaments 'burned' in two distinct stages. Samples of the filaments were quenched at different times before and during the burning and analyzed using electron microscopy. The beginning of the first stage combustion characterized by a local resistance minimum, a sharp spike in boron oxide radiation emission, and a rapid rise in temperature, occurred at 1500 +/- 70 deg. C, independent of pre-heating history and oxygen content (540%) in the gas environment. The data suggest that a phase transition occurs in the filaments at this temperature that triggers stage one combustion. Significant amounts of oxygen were found inside quenched filaments. Large spherical voids formed in the boron filaments during their second stage combustion which is interpreted to indicate a crucial role for the gas dissolution processes in the combustion scenario.

  16. A system to deposit boron films (boronization) in the DIII-D tokamak

    International Nuclear Information System (INIS)

    Hodapp, T.R.; Jackson, G.L.; Phillips, J.; Holtrop, K.L.; Peterson, P.L.; Winters, J.

    1992-01-01

    A system has been added to the DIII-D tokamak to coat its plasma facing surfaces with a film of boron using diborane gas. The system includes special health and safety equipment for handling the diborane gas which is toxic and inflammable. The purpose f the boron film is to reduce the levels of impurity atoms in the DIII-D plasmas. Experiments following the application of the boron film in DIII-D have led to significant reductions in plasma impurity levels and the observation of a new, very high confinement regime

  17. A system to deposit boron films (boronization) in the DIII-D tokamak

    International Nuclear Information System (INIS)

    Hodapp, T.R.; Jackson, G.L.; Phillips, J.; Holtrop, K.L.; Petersen, P.I.; Winter, J.

    1991-09-01

    A system has been added to the D3-D tokamak to coat its plasma facing surfaces with a film of boron using diborane gas. The system includes special health and safety equipment for handling the diborane gas which is toxic and inflammable. The purpose of the boron film is to reduce the levels of impurity atoms in the D3-D plasmas. Experiments following the application of the boron film in D3-D have led to significant reductions in plasma impurity levels and the observation of a new, very high confinement regime. 9 refs., 1 fig

  18. Boron removal by electrocoagulation and recovery.

    Science.gov (United States)

    Isa, Mohamed Hasnain; Ezechi, Ezerie Henry; Ahmed, Zubair; Magram, Saleh Faraj; Kutty, Shamsul Rahman Mohamed

    2014-03-15

    This work investigated the removal of boron from wastewater and its recovery by electrocoagulation and hydrothermal mineralization methods respectively. The experimental design was developed using Box-Behnken Model. An initial study was performed based on four preselected variables (pH, current density, concentration and time) using synthetic wastewater. Response surface methodology (RSM) was used to evaluate the effect of process variables and their interaction on boron removal. The optimum conditions were obtained as pH 6.3, current density 17.4 mA/cm(2), and time 89 min. At these applied optimum conditions, 99.7% boron removal from an initial concentration of 10.4 mg/L was achieved. The process was effectively optimized by RSM with a desirability value of 1.0. The results showed that boron removal efficiency enhanced with increase in current density and treatment time. Removal efficiency also increased when pH was increased from 4 to 7 and subsequently decreased at pH 10. Adsorption kinetics study revealed that the reaction followed pseudo second order kinetic model; evidenced by high correlation and goodness of fit. Thermodynamics study showed that mechanism of boron adsorption was chemisorption and the reaction was endothermic in nature. Furthermore, the adsorption process was spontaneous as indicated by negative values of the adsorption free energy. Treatment of real produced water using electrocoagulation resulted in 98% boron removal. The hydrothermal mineralization study showed that borate minerals (Inyoite, Takadaite and Nifontovite) can be recovered as recyclable precipitate from electrocoagulation flocs of produced water. Copyright © 2013 Elsevier Ltd. All rights reserved.

  19. Boron nitride nanotubes for spintronics.

    Science.gov (United States)

    Dhungana, Kamal B; Pati, Ranjit

    2014-09-22

    With the end of Moore's law in sight, researchers are in search of an alternative approach to manipulate information. Spintronics or spin-based electronics, which uses the spin state of electrons to store, process and communicate information, offers exciting opportunities to sustain the current growth in the information industry. For example, the discovery of the giant magneto resistance (GMR) effect, which provides the foundation behind modern high density data storage devices, is an important success story of spintronics; GMR-based sensors have wide applications, ranging from automotive industry to biology. In recent years, with the tremendous progress in nanotechnology, spintronics has crossed the boundary of conventional, all metallic, solid state multi-layered structures to reach a new frontier, where nanostructures provide a pathway for the spin-carriers. Different materials such as organic and inorganic nanostructures are explored for possible applications in spintronics. In this short review, we focus on the boron nitride nanotube (BNNT), which has recently been explored for possible applications in spintronics. Unlike many organic materials, BNNTs offer higher thermal stability and higher resistance to oxidation. It has been reported that the metal-free fluorinated BNNT exhibits long range ferromagnetic spin ordering, which is stable at a temperature much higher than room temperature. Due to their large band gap, BNNTs are also explored as a tunnel magneto resistance device. In addition, the F-BNNT has recently been predicted as an ideal spin-filter. The purpose of this review is to highlight these recent progresses so that a concerted effort by both experimentalists and theorists can be carried out in the future to realize the true potential of BNNT-based spintronics.

  20. Boron Nitride Nanotubes for Spintronics

    Directory of Open Access Journals (Sweden)

    Kamal B. Dhungana

    2014-09-01

    Full Text Available With the end of Moore’s law in sight, researchers are in search of an alternative approach to manipulate information. Spintronics or spin-based electronics, which uses the spin state of electrons to store, process and communicate information, offers exciting opportunities to sustain the current growth in the information industry. For example, the discovery of the giant magneto resistance (GMR effect, which provides the foundation behind modern high density data storage devices, is an important success story of spintronics; GMR-based sensors have wide applications, ranging from automotive industry to biology. In recent years, with the tremendous progress in nanotechnology, spintronics has crossed the boundary of conventional, all metallic, solid state multi-layered structures to reach a new frontier, where nanostructures provide a pathway for the spin-carriers. Different materials such as organic and inorganic nanostructures are explored for possible applications in spintronics. In this short review, we focus on the boron nitride nanotube (BNNT, which has recently been explored for possible applications in spintronics. Unlike many organic materials, BNNTs offer higher thermal stability and higher resistance to oxidation. It has been reported that the metal-free fluorinated BNNT exhibits long range ferromagnetic spin ordering, which is stable at a temperature much higher than room temperature. Due to their large band gap, BNNTs are also explored as a tunnel magneto resistance device. In addition, the F-BNNT has recently been predicted as an ideal spin-filter. The purpose of this review is to highlight these recent progresses so that a concerted effort by both experimentalists and theorists can be carried out in the future to realize the true potential of BNNT-based spintronics.

  1. Reactive sputter deposition of boron nitride

    International Nuclear Information System (INIS)

    Jankowski, A.F.; Hayes, J.P.; McKernan, M.A.; Makowiecki, D.M.

    1995-10-01

    The preparation of fully dense, boron targets for use in planar magnetron sources has lead to the synthesis of Boron Nitride (BN) films by reactive rf sputtering. The deposition parameters of gas pressure, flow and composition are varied along with substrate temperature and applied bias. The films are characterized for composition using Auger electron spectroscopy, for chemical bonding using Raman spectroscopy and for crystalline structure using transmission electron microscopy. The deposition conditions are established which lead to the growth of crystalline BN phases. In particular, the growth of an adherent cubic BN coating requires 400--500 C substrate heating and an applied -300 V dc bias

  2. Proton linacs for boron neutron capture therapy

    International Nuclear Information System (INIS)

    Lennox, A.J.

    1993-08-01

    Recent advances in the ability to deliver boron-containing drugs to brain tumors have generated interest in ∼4 MeV linacs as sources of epithermal neutrons for radiation therapy. In addition, fast neutron therapy facilities have been studying methods to moderate their beams to take advantage of the high cross section for epithermal neutrons on boron-10. This paper describes the technical issues involved in each approach and presents the motivation for undertaking such studies using the Fermilab linac. the problems which must be solved before therapy can begin are outlined. Status of preparatory work and results of preliminary measurements are presented

  3. Titanium reinforced boron-polyimide composite

    Science.gov (United States)

    Clark, G. A.; Clayton, K. I.

    1969-01-01

    Processing techniques for boron polyimide prepreg were developed whereby composites could be molded under vacuum bag pressure only. A post-cure cycle was developed which resulted in no loss in room temperature mechanical properties of the composite at any time during up to 16 hours at 650 F. A design utilizing laminated titanium foil was developed to achieve a smooth transition of load from the titanium attachment points into the boron-reinforced body of the structure. The box beam test article was subjected to combined bending and torsional loads while exposed to 650 F. Loads were applied incrementally until failure occurred at 83% design limit load.

  4. Designing your boron-charging system

    International Nuclear Information System (INIS)

    Miller, J.

    1979-01-01

    High-pressure positive-displacement pumps used in the boron-charging setups of pressurized-water (PWR) nuclear plants because of their inherently high efficiencies over a wide range of pressures and speeds are described. Hydrogen-saturated water containing 4-12% boric acid is fed to the pump from a volume-control tank under a gas blanket. Complicated piping and the pulsation difficulties associated with reciprocating pumps make hydrogen-saturated boron-charging systems a challenge to the designer. The article describes the unusual hydraulics of the systems to help assure a trouble-free design

  5. Model for calculating the boron concentration in PWR type reactors

    International Nuclear Information System (INIS)

    Reis Martins Junior, L.L. dos; Vanni, E.A.

    1986-01-01

    A PWR boron concentration model has been developed for use with RETRAN code. The concentration model calculates the boron mass balance in the primary circuit as the injected boron mixes and is transported through the same circuit. RETRAN control blocks are used to calculate the boron concentration in fluid volumes during steady-state and transient conditions. The boron reactivity worth is obtained from the core concentration and used in RETRAN point kinetics model. A FSAR type analysis of a Steam Line Break Accident in Angra I plant was selected to test the model and the results obtained indicate a sucessfull performance. (Author) [pt

  6. PENGARUH KOMPOSOSI LAPISAN PADA PERMUKAAN GLOBULA MINYAK EMULSI SEBELUM PENGERINGAN SEMPROT TERHADAP SIFAT-SIFAT MIKROKAMSUL TRIGLISERIDA KAYA ASAM LEMAK W-3 [The Effect of the Composition of Adsorbed Layer at Globule Interface of -3 Fatty Acids Enriched Triglyceride Prior to Spray Drying on its Microcapsule Properties

    Directory of Open Access Journals (Sweden)

    Moch Adnan2

    2005-04-01

    Full Text Available Emulsification is the critical factor in microencapsulation by spray drying method. Sodium caseinate is a protein with good emulsifying properties. The properties could be improved by phospholipids addition in the emulsification. Phospholipids addition which stabilized oil globule might change the composition of adsorbed layer.This research was conducted to analyze the changes in composition at oil globule interface by analyzing emulsion systems of triglyceride enriched by -3 fatty acids at 5% (w/v stabilized by sodium caseinate (10% w/v and addition of phospholipids at 0; 0,5; 1,0; 1,5; 2,0; and 2,5% (w/v. The changes in composition of adsorbed layer could be determined from the changes in phospholipids and adsorbed protein concentrations at oil globule interface. Analyses were done to measure the possibility of casein-phospholipids complex, phospholipids and protein adsorption concentration at interface, and adsorbed protein.The increase of phospholipids concentration in the emulsions stabilized by sodium caseinate changed the composition of adsorbed layer at interface. There was phospholipids increase and adsorbed protein decrease at oil globule interface. These changes were caused by casein-phospholipids complex which that decreased surface activity and displacement protein by phospholipids that was adsorbed at oil globule interface.Changes of composition of casein-phospholipids at oil globule prior to microcapsulation process caused changes in the properties of microcapsule produced. The increasing phospholipids and decreasing casein concentrations at oil globule interface decreased the quality of the microcapsule, including decreasing in microencapsulation efficiency, in oxidative stability, and decreasing in EPA+DHA content.

  7. PENGARUH KARAKTERISTIK PERSONAL TERHADAP ETNOSENTRISME KONSUMEN PADA PRODUK DOMESTIK

    Directory of Open Access Journals (Sweden)

    Ramadania Ramadania

    2015-11-01

    Full Text Available AbstractThe purpose of this study is to examine the personal characteristics of the social-psychological antecedents consisting of cultural openness, patriotism, conservatism and collectivism on consumer ethnocentrism (CE. The survey was conducted on 202 consumers in West Kalimantan, Indonesia. The results showed that the cultural openness has a negative effect on CE. This study also provides evidence that collectivism showed a significant positive influence on CE. While, patriotism and conservatism do not have a significant effect on CE. This study implies that openness of foreign culture can undermine CE. However, CE can be improved by keeping the values of collectivism. This research shows that consumers tend to be rational. Therefore patriotism and conservatism are not transferred to the CE pattern.Keywords: Cultural openness, patriotism, conservatism, collectivism, consumer ethnocentrismAbstrakTujuan penelitian ini adalah untuk menguji pengaruh karakteristik personal dari anteseden psikologi sosial yang terdiri dari keterbukaan budaya, patriotisme, konservatisme, dan kolektivisme terhadap etnosentrisme konsumen (CE. Survei dilakukan terhadap 202 konsumen di Kalimantan Barat, Indonesia. Hasil penelitian menunjukkan bahwa keterbukaan budaya memiliki pengaruh negatif yang signifikan terhadap CE. Penelitian ini juga menemukan bahwa kolektivisme memiliki pengaruh positif yang signifikan terhadap CE. Penelitian ini mengimplikasikan bahwa keterbukaan terhadap budaya asing dapat memperlemah CE. Namun demikian CE dapat ditingkatkan dengan menjaga nilai-nilai kolektivisme. Peneliitian ini menunjukkan bahwa konsumen cenderung rasional. Olehkarenanya patriotisme dan konservatisme tidak di transfer kedalam pola CE.Kata Kunci: Keterbukaan budaya, patriotisme, koservatisme, kolektivisme, etnosentrisme konsumen.

  8. ANALISIS PENGARUH TINGKAT KESEHATAN BANK TERHADAP RETURN ON ASSET

    Directory of Open Access Journals (Sweden)

    Andy Setiawan

    2017-10-01

    Full Text Available Penelitian  ini  dilakukan  untuk  menganalisis pengaruh  tingkat kesehatan bank terhadap return on asset (ROA berdasarkan metode risk based bank rating (RBBR. Variabel independen yang diteliti adalah Non  Performing  Loan  (NPL, Loan to Deposit Ratio (LDR, Net Interest Margin (NIM, Capital Adequacy Ratio (CAR,  BOPO   (Biaya   Operasional/Pendapatan Operasional, Good Corporate Governance (GCG dan Posisi  Devisa  Netto  (PDN terhadap variabel dependen Return On Asset (ROA. Sampel yang digunakan  adalah  seluruh bank BUKU 4 di Indonesia selama periode 2007-2014. Teknik analisis data yang  digunakan  adalah  regresi  linier  berganda. Hasil penelitian ini menunjukkan bahwa tingkat kesehatan bank dengan metode RBBR berpengaruh signifikan secara bersama terhadap ROA. Secara parsial LDR, NIM, BOPO, dan PDN berpengaruh signifikan terhadap ROA. Sedangkan variabel NPL, GCG dan CAR tidak berpengaruh signifikan. Kemampuan prediksi dari ketujuh variabel  tersebut  terhadap  ROA  dalam  penelitian  ini  sebesar  93,7%,  sedangkan sisanya 6,3% dipengarui oleh faktor lain yang tidak dimasukkan ke dalam model penelitian.

  9. Insights into the Mechanisms Underlying Boron Homeostasis in Plants

    Directory of Open Access Journals (Sweden)

    Akira Yoshinari

    2017-11-01

    Full Text Available Boron is an essential element for plants but is toxic in excess. Therefore, plants must adapt to both limiting and excess boron conditions for normal growth. Boron transport in plants is primarily based on three transport mechanisms across the plasma membrane: passive diffusion of boric acid, facilitated diffusion of boric acid via channels, and export of borate anion via transporters. Under boron -limiting conditions, boric acid channels and borate exporters function in the uptake and translocation of boron to support growth of various plant species. In Arabidopsis thaliana, NIP5;1 and BOR1 are located in the plasma membrane and polarized toward soil and stele, respectively, in various root cells, for efficient transport of boron from the soil to the stele. Importantly, sufficient levels of boron induce downregulation of NIP5;1 and BOR1 through mRNA degradation and proteolysis through endocytosis, respectively. In addition, borate exporters, such as Arabidopsis BOR4 and barley Bot1, function in boron exclusion from tissues and cells under conditions of excess boron. Thus, plants actively regulate intracellular localization and abundance of transport proteins to maintain boron homeostasis. In this review, the physiological roles and regulatory mechanisms of intracellular localization and abundance of boron transport proteins are discussed.

  10. A colorimetric determination of boron in biological sample for boron neutron capture therapy (BNCT)

    International Nuclear Information System (INIS)

    Camillo, M.A.P.; Tomac Junior, U.

    1990-01-01

    The boron neutron capture therapy (BNCT) has shown better prognosis in the treatment of glyemas and gluoblastomas grade III and IV than other therapies. During the treatment the levels of Na 2 10 B 12 H 11 SH must be known in several compartiments of the organism and with this purpose the method of colorimetric determination of boron using curcumine was established. This method is simple, reprodutible and adequate sensitivity for this control. (author) [pt

  11. A colorimetric determination of boron in biological sample for boron neutron capture therapy

    International Nuclear Information System (INIS)

    Camilo, M.A.P.; Tomac Junior, U.

    1989-01-01

    The boron neutron capture therapy (BNCT) has shown better prognosis in the treatment of gliomas and glioblastomas grade III and IV than other therapies. During the treatment of levels of Na 2 10 B 12 H 11 S H must be known in several compartments of the organism and with this purpose the method of colorimetric determination of boron using curcumin was established. This method is simples, reproducible and has adequate sensitivity for this control. (author). 7 refs, 3 figs, 1 tab

  12. Boron uptake measurements in a rat model for Boron Neutron Capture Therapy of lung tumours

    Energy Technology Data Exchange (ETDEWEB)

    Bortolussi, S., E-mail: silva.bortolussi@pv.infn.i [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); National Institute of Nuclear Physics (INFN), Section of Pavia, via Bassi 6, 27100 Pavia (Italy); Bakeine, J.G. [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); Ballarini, F. [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); National Institute of Nuclear Physics (INFN), Section of Pavia, via Bassi 6, 27100 Pavia (Italy); Bruschi, P. [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); Gadan, M.A. [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); Comision Nacional de Energia Atomica, Buenos Aires (Argentina); Protti, N.; Stella, S. [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); National Institute of Nuclear Physics (INFN), Section of Pavia, via Bassi 6, 27100 Pavia (Italy); Clerici, A.; Ferrari, C.; Cansolino, L.; Zonta, C.; Zonta, A. [Department of Surgery, University of Pavia, via Ferrata 27100 Pavia (Italy); Nano, R. [Department of Animal Biology, University of Pavia, via Ferrata 27100 Pavia (Italy); Altieri, S. [Department of Nuclear and Theoretical Physics, University of Pavia, via Bassi 6, 27100 Pavia (Italy); National Institute of Nuclear Physics (INFN), Section of Pavia, via Bassi 6, 27100 Pavia (Italy)

    2011-02-15

    Lung carcinoma is the leading cause of cancer mortality in the Western countries. Despite the introduction over the last few years of new therapeutic agents, survival from lung cancer has shown no discernible improvement in the last 20 years. For these reasons any efforts to find and validate new effective therapeutic procedures for lung cancer are very timely. The selective boron uptake in the tumour with respect to healthy tissues makes Boron Neutron Capture Therapy a potentially advantageous option in the treatment of tumours that affect whole vital organs, and that are surgically inoperable. To study the possibility of applying BNCT to the treatment of diffuse pulmonary tumours, an animal model for boron uptake measurements in lung metastases was developed. Both healthy and tumour-bearing rats were infused with Boronophenylalanine (BPA) and sacrificed at different time intervals after drug administration. The lungs were extracted, and prepared for boron analysis by neutron autoradiography and {alpha}-spectroscopy. The boron concentrations in tumour and normal lung were plotted as a function of the time elapsed after BPA administration. The concentration in tumour is almost constant within the error bars for all the time intervals of the experiment (1-8 h), while the curve in normal lung decreases after 4 h from BPA infusion. At 4 h, the ratio of boron concentration in tumour to boron concentration in healthy lung is higher than 3, and it stays above this level up to 8 h. Also the images of boron distribution in the samples, obtained by neutron autoradiography, show a selective absorption in the metastases.

  13. Nuclear magnetic resonance spectroscopy of boron compounds containing two-, three- and four-coordinate boron

    International Nuclear Information System (INIS)

    Wrackmeyer, B.

    1988-01-01

    The influence of boron chemistry on various areas of research in inorganic, organic and theoretical chemistry is well documented. In fact, many models presently employed to describe chemical bonding in general can be traced to attempts to understand bonding in boranes. The confirmation of many theoretical predictions in boron chemistry relies on direct and indirect structural information provided by various physical methods that - fortunately - became available almost at the same rate as that with which the interest in boron compounds was growing. Clearly, there has always been a strong link between the interest in synthesis and the application of physical methods. As in many other areas of chemistry, developments in boron chemistry have been greatly accelerated by NMR. 11 B NMR has been at the center of interest from the beginning, accompanied by routine 1 H NMR measurements, and occasional 14 N, 19 F and 31 P NMR work. In the last 12 years, we have seen an increasing number of 13 C NMR studies of boron compounds. The availability of multinuclear facilities for PFT NMR spectrometers stimulates the measurement of the NMR spectra of other nuclei, like 29 Si, 119 Sn or other metals, in order to obtain additional information. This paper is intended to serve several purposes: to update previous reviews on 11 B NMR of boron compounds, to demonstrate some applications of multinuclear NMR to boron chemistry; to attempt to incorporate new NMR parameters into the known data set; and to summarize the experimental facts required for obtaining the maximum information from NMR studies on boron compounds

  14. Pengawasan Terhadap Bisnis Syariah di Indonesia

    Directory of Open Access Journals (Sweden)

    Nur Atiqah Mahmudah

    2012-09-01

    Full Text Available Dalam Islam, bisnis memiliki posisi yang sangat mulia dan strategis (bukan sekedar diperbolehkan dalam Islam melainkan justru diperintahkan oleh Allah SWT. Bisnis yang dijalankan dengan governance yang baik akan lebih memungkinkan untuk tetap sustainable / berlangsung secara baik. Keberlangsungan bisnis syariah harus dijaga untuk kemanfaatan semua pihak, sekaligus manfaat dunia dan akhirat. Artikel ini berusaha menjelaskan pola pengawasan terhadap bisnis syariah yang memiliki karakteristik tersendiri dan tentunya sangat berbeda dengan jenis bisnis lainnya baik secara konsep maupun praktis. Dalam artikel ini pula akan dijelaskan bagaimana prinsip dasar etika dalam bisnis syariah disertai beberapa contoh bisnis syariah yang berkembang di Indonesia dan Malaysia. Dalam bisnis syariah tak dapat terlepaskan dari syariah compliance, yakni salah satu elemen kunci yang berfungsi sebagai regulator dalam mengeluarkan kebijakan, aturan, tata kerja yang di jalankan dalam prakteknya. Instrumen tersebut adalah Dewan Pengawas Syariah yang memiliki peranan penting dalam menegakkan syariah compliance di bisnis syariah.

  15. PENGARUH PERSONALITY TRAITS TERHADAP PERENCANAAN KEUANGAN KELUARGA

    Directory of Open Access Journals (Sweden)

    Subiaktono -

    2013-09-01

    Full Text Available Tujuan dari penelitian ini adalah untuk menguji dan menganalisis pengaruh ciri-ciri kepribadian yang terdiri dari agreeableness, conscientiousness, body focus, materialism and need for arousal pada perencanaan keuangan keluarga. Sampel dari penelitian ini adalah pegawai Bank BTN Cabang Semarang dengan alat analisis kualitatif dan kuantitatif. Hasilnya menunjukkan bahwa variabel-variabel independen (Agreeableness, Conscientiousness, Body Focus, Materialism, dan Need for arrousal mempunyai pengaruh yang signifikan terhadap perencanaan  keuangan  keluarga. Sehingga dapat disimpulkan bahwa kurangnya kemampuan karyawan dalam mengelola keuangan karena faktor pengetahuan yang dimiliki dan kuatnya pengaruh psikologis pada diri mereka. Faktor psikologis seringkali dianggap sebagai faktor kunci dalam proses pembuatan keputusan manajemen keuangan keluarga. Semakin kuat aspek kepribadian suami dan istri sebagai manajer keuangan, semakin besar pengaruh keputusan psikologis terhadap keputusan keuangan. Gaya hidup, pola belanja yang tidak terencana, biaya sosial yang tidak dianggarkan, lingkungan, dan literasi manajemen keuangan menjadi faktor pendukung timbulnya manajemen yang buruk atau bahkan kegagalan The aim of this research is to examine and analyze the effect of personality traits that consists of agreeableness, conscientiousness, body focus, materialism and need for arousal on the family financial planning. The sample of this research is a group of people who are employees of the BTN Bank Semarang branch with qualitative and quantitative analysis tools. The result shows that independent variables (agreeableness, conscientiousness, body focus, materialism and need for arousal have significant effects on the family financial planning.It could be concluded that the lack of employee ability in how to manage family finance is caused by their own knowledge and their psychological factor. Psychological factor is often considered as a key factor in family

  16. Pengaruh Frekuensi Vibrasi terhadap Penyembuhan Luka Diabetes

    Directory of Open Access Journals (Sweden)

    Yunita Sari

    2017-09-01

    Full Text Available Page Header User Username Password Remember me Editorial Team Editor Policies Mechanism & Ethics Author Guideline Reference Tools: About The Authors Yunita Sari Eman Sutrisna Hartono H Article Tools Print this article Indexing metadata How to cite item Finding References Review policy Email this article (Login required Email the author (Login required Information For Readers For Authors For Librarians Journal Content Search Search Scope Browse By Issue By Author By Title Home About Login Register Search Current Archives Announcements Register Index Contact Us Home > Vol 4, No 2 (2016 > Sari Pengaruh Frekuensi Vibrasi terhadap Penyembuhan Luka Diabetes Yunita Sari, Eman Sutrisna, Hartono H Abstract Penelitian menyatakan bahwa vibrasi 47 Hz dapat meningkatkan penyembuhan luka diabetes. Namun sampai saat ini belum diketahui apakah frekuensi dibawah dan diatas 47 Hz dapat meningkatkan penyembuhan luka diabetes. Oleh karena itu, tujuan dari penelitian ini adalah untuk mengetahui efek frekuensi vibrasi yang berbeda terhadap penyembuhan luka diabetes. Desain penelitian eksperimen ini melibatkan 5 kelompok tikus putih; kelompok yang mendapatkan vibrasi 40 Hz (frekuensi rendah, kelompok 106 Hz (frekuensi menengah, kelompok 200 Hz (frekuensi tinggi, kelompok 300 Hz (frekuensi sangat tinggi, dan kelompok kontrol (tanpa vibrasi. Induksi diabetes dilakukan dengan Alloxan Monohidrat. Vibrasi diberikan selama 10 menit. Status luka didasarkan pada jaringan nekrotik, ukuran luka, inflamasi, dan reepitelisasi. Analisis histologi dilakukan dengan pewarnaan Hematoksilin dan Eosin. Ukuran luka dianalisis dengan uji ANOVA, diikuti oleh tes Tukey. Hasil penelitian menunjukkan bahwa jaringan nekrotik dan intensitas inflamasi paling sedikit pada kelompok 40 Hz, dan paling banyak pada kelompok 300 Hz. Reepitelisasi paling baik pada kelompok 40 Hz, dan paling rusak pada 300 Hz. Ukuran luka di kelompok 40 Hz secara signifikan lebih kecil dibandingkan dengan kelompok lain

  17. ICP-MS determination of boron: method optimization during preparation of graphite reference material for boron

    International Nuclear Information System (INIS)

    Granthali, S.K.; Shailaja, P.P.; Mainsha, V.; Venkatesh, K.; Kallola, K.S.; Sanjukta, A.K.

    2017-01-01

    Graphite finds widespread use in nuclear reactors as moderator, reflector, and fuel fabricating components because of its thermal stability and integrity. The manufacturing process consists of various mixing, moulding and baking operations followed by heat-treatment between 2500 °C and 3000 °C. The high temperature treatment is required to drive the amorphous carbon-to-graphite phase transformation. Since synthetic graphite is processed at high temperature, impurity concentrations in the precursor carbon get significantly reduced due to volatilization. However boron may might partly gets converted into boron carbide at high temperatures in the carbon environment of graphite and remains stable (B_4C: boiling point 3500 °C) in the matrix. Literature survey reveals the use of various methods for determination of boron. Previously we have developed a method for determination of boron in graphite electrodes using inductively coupled plasma mass spectrometry (ICP-MS). The method involves removal of graphite matrix by ignition of the sample at 800°C in presence of saturated barium hydroxide solution to prevent the loss of boron. Here we are reporting a modification in the method by using calcium carbonate in place of barium hydroxide and using beryllium (Be) as an internal standard, which resulted in a better precession. The method was validated by spike recovery experiments as well as using another technique viz. Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The modified method was applied in evaluation of boron concentration in the graphite reference material prepared

  18. Boron exposure through drinking water during pregnancy and birth size.

    Science.gov (United States)

    Igra, Annachiara Malin; Harari, Florencia; Lu, Ying; Casimiro, Esperanza; Vahter, Marie

    2016-10-01

    Boron is a metalloid found at highly varying concentrations in soil and water. Experimental data indicate that boron is a developmental toxicant, but the few human toxicity data available concern mostly male reproduction. To evaluate potential effects of boron exposure through drinking water on pregnancy outcomes. In a mother-child cohort in northern Argentina (n=194), 1-3 samples of serum, whole blood and urine were collected per woman during pregnancy and analyzed for boron and other elements to which exposure occurred, using inductively coupled plasma mass spectrometry. Infant weight, length and head circumference were measured at birth. Drinking water boron ranged 377-10,929μg/L. The serum boron concentrations during pregnancy ranged 0.73-605μg/L (median 133μg/L) and correlated strongly with whole-blood and urinary boron, and, to a lesser extent, with water boron. In multivariable-adjusted linear spline regression analysis (non-linear association), we found that serum boron concentrations above 80μg/L were inversely associated with birth length (B-0.69cm, 95% CI -1.4; -0.024, p=0.043, per 100μg/L increase in serum boron). The impact of boron appeared stronger when we restricted the exposure to the third trimester, when the serum boron concentrations were the highest (0.73-447μg/L). An increase in serum boron of 100μg/L in the third trimester corresponded to 0.9cm shorter and 120g lighter newborns (p=0.001 and 0.021, respectively). Considering that elevated boron concentrations in drinking water are common in many areas of the world, although more screening is warranted, our novel findings warrant additional research on early-life exposure in other populations. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  19. Boron nitride nanosheets reinforced glass matrix composites

    Czech Academy of Sciences Publication Activity Database

    Saggar, Richa; Porwal, H.; Tatarko, P.; Dlouhý, Ivo; Reece, M. J.

    2015-01-01

    Roč. 114, SEP (2015), S26-S32 ISSN 1743-6753 R&D Projects: GA MŠk(CZ) 7AMB14SK155 EU Projects: European Commission(XE) 264526 Institutional support: RVO:68081723 Keywords : Boron nitride nanosheets * Borosilicate glass * Mechanical properties Subject RIV: JL - Materials Fatigue, Friction Mechanics Impact factor: 1.162, year: 2015

  20. Boron-doped manganese dioxide for supercapacitors.

    Science.gov (United States)

    Chi, Hong Zhong; Li, Yuwei; Xin, Yingxu; Qin, Haiying

    2014-11-11

    The addition of boron as a dopant during the reaction between carbon fiber and permanganate led to significant enhancement of the growth-rate and formation of the porous framework. The doped MnO2 was superior to the pristine sample as electrode materials for supercapacitors in terms of the specific capacitance and rate capability.

  1. Intrinsic ferromagnetism in hexagonal boron nitride nanosheets

    Energy Technology Data Exchange (ETDEWEB)

    Si, M. S.; Gao, Daqiang, E-mail: gaodq@lzu.edu.cn, E-mail: xueds@lzu.edu.cn; Yang, Dezheng; Peng, Yong; Zhang, Z. Y.; Xue, Desheng, E-mail: gaodq@lzu.edu.cn, E-mail: xueds@lzu.edu.cn [Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China); Liu, Yushen [Jiangsu Laboratory of Advanced Functional Materials and College of Physics and Engineering, Changshu Institute of Technology, Changshu 215500 (China); Deng, Xiaohui [Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008 (China); Zhang, G. P. [Department of Physics, Indiana State University, Terre Haute, Indiana 47809 (United States)

    2014-05-28

    Understanding the mechanism of ferromagnetism in hexagonal boron nitride nanosheets, which possess only s and p electrons in comparison with normal ferromagnets based on localized d or f electrons, is a current challenge. In this work, we report an experimental finding that the ferromagnetic coupling is an intrinsic property of hexagonal boron nitride nanosheets, which has never been reported before. Moreover, we further confirm it from ab initio calculations. We show that the measured ferromagnetism should be attributed to the localized π states at edges, where the electron-electron interaction plays the role in this ferromagnetic ordering. More importantly, we demonstrate such edge-induced ferromagnetism causes a high Curie temperature well above room temperature. Our systematical work, including experimental measurements and theoretical confirmation, proves that such unusual room temperature ferromagnetism in hexagonal boron nitride nanosheets is edge-dependent, similar to widely reported graphene-based materials. It is believed that this work will open new perspectives for hexagonal boron nitride spintronic devices.

  2. Anomalous Seebeck coefficient in boron carbides

    International Nuclear Information System (INIS)

    Aselage, T.L.; Emin, D.; Wood, C.; Mackinnon, I.D.R.; Howard, I.A.

    1987-01-01

    Boron carbides exhibit an anomalously large Seebeck coefficient with a temperature coefficient that is characteristic of polaronic hopping between inequivalent sites. The inequivalence in the sites is associated with disorder in the solid. The temperature dependence of the Seebeck coefficient for materials prepared by different techniques provides insight into the nature of the disorder

  3. NEW ADVANCES IN BORON SOIL CHEMISTRY - Paper

    Science.gov (United States)

    Boron is an essential plant micronutrient for which the range between deficiency and toxicity is narrower than for any other nutrient element. Plants respond directly to the amount of B in soil solution and only indirectly to the amount of B adsorbed on soil particle surfaces. ...

  4. NEW ADVANCES IN BORON SOIL CHEMISTRY

    Science.gov (United States)

    Boron is an essential plant micronutrient for which the range between deficiency and toxicity is narrower than for any other nutrient element. Plants respond directly to the amount of B in soil solution and only indirectly to the amount of B adsorbed on soil particle surfaces. ...

  5. New insight into pecan boron nutrition

    Science.gov (United States)

    Alternate bearing by individual pecan [Carya illinoinensis (Wangenh.) K. Koch] trees is problematic for nut producers and processors. There are many unknowns regarding alternate bearing physiology, such as the relationship between boron and fruit set, nutmeat quality, and kernel maladies. Evidence...

  6. Joining of boron carbide using nickel interlayer

    International Nuclear Information System (INIS)

    Vosughi, A.; Hadian, A. M.

    2008-01-01

    Carbide ceramics such as boron carbide due to their unique properties such as low density, high refractoriness, and high strength to weight ratio have many applications in different industries. This study focuses on direct bonding of boron carbide for high temperature applications using nickel interlayer. The process variables such as bonding time, temperature, and pressure have been investigated. The microstructure of the joint area was studied using electron scanning microscope technique. At all the bonding temperatures ranging from 1150 to 1300 d eg C a reaction layer formed across the ceramic/metal interface. The thickness of the reaction layer increased by increasing temperature. The strength of the bonded samples was measured using shear testing method. The highest strength value obtained was about 100 MPa and belonged to the samples bonded at 1250 for 75 min bonding time. The strength of the joints decreased by increasing the bonding temperature above 1250 d eg C . The results of this study showed that direct bonding technique along with nickel interlayer can be successfully utilized for bonding boron carbide ceramic to itself. This method may be used for bonding boron carbide to metals as well.

  7. Influence of pollution of boron chlorinity ratio

    Digital Repository Service at National Institute of Oceanography (India)

    Narvekar, P.V.; Zingde, M.D.

    Presence of boron in domestic wastewater has resulted in high B/CI ratio at some locations in the coastal water around Bombay. A widest range (0.215-0.281) of B/CI was observed at a location with high influence of wastewater release. The mean B...

  8. Bandgap engineered graphene and hexagonal boron nitride

    Indian Academy of Sciences (India)

    In this article a double-barrier resonant tunnelling diode (DBRTD) has been modelled by taking advantage of single-layer hexagonal lattice of graphene and hexagonal boron nitride (h-BN). The DBRTD performance and operation are explored by means of a self-consistent solution inside the non-equilibrium Green's ...

  9. Reaction of boron carbide with molybdenum disilicide

    International Nuclear Information System (INIS)

    Novikov, A.V.; Melekhin, V.F.; Pegov, V.S.

    1989-01-01

    The investigation results of interaction in the B 4 C-MoSi 2 system during sintering in vacuum are presented. Sintering of boron carbide with molybdenum disilicide is shown to lead to the formation of MoB 2 , SiC, Mo 5 Si 3 compounds, the presence of carbon-containing covering plays an important role in sintering

  10. Crystal structure of isomeric boron difluoride acetylnaphtholates

    International Nuclear Information System (INIS)

    Bukvetskij, B.V.; Fedorenko, E.V.; Mirochnik, A.G.; Karasev, V.E.

    2006-01-01

    Crystal structures of luminescent isomeric acetylnaphtholates of boron difluoride are investigated. Full X-ray structural analysis is done at 293 K. Coordinated of atoms, bond angles, bond lengths, interatomic distances are determined. Results of comparative evaluations of the isomers are represented [ru

  11. Radiobiology of boron neutron capture therapy

    International Nuclear Information System (INIS)

    Bond, V.P.

    1986-01-01

    The author addresses the question of single session versus protracted therapy in the application of boron neutron therapy to tumors. As background he discusses the reasoning behind the current use of fractionated therapy with conventional low-LET radiations and difference which may obtain for neutron therapy. Several aspects of dose rates and dose levels are then addressed

  12. BCM6: New Generation of Boron Meter

    International Nuclear Information System (INIS)

    Pirat, P.

    2010-01-01

    Full text of publication follows: Rolls-Royce has developed a new generation of boron meter, based on more than 30 years of experience. The Rolls-Royce BCM6 boron meter provides Nuclear Power Plant (NPP) operators with the boron concentration of the primary circuit. The meter provides continuous and safe measurements with no manual sampling and no human contact. In this paper, technical features, advantages and customer benefits of the use of the new generation of Rolls-Royce BCM6 boron meter will be detailed. Values and associated alarms are provides over different media: 4-20 mA outputs, relays, displays in the main control room and in the chemical lab, and digital links. A special alarm avoids unexpected homogeneous dilution of the primary circuit, which is a critical operational parameter. The Rolls-Royce BCM6 boron meter is fully configurable over a set of parameters allowing adaptation to customer needs. It has a differential capability, thus eliminating neutronic noise and keeping measurements accurate, even in the case of fuel clad rupture. Measurements are accurate, reliable, and have a quick response time. Equipment meets state-of-the-art qualification requests. Designed in 2008, the BCM6 boron meter is the newest equipment of Rolls-Royce boron meters product line. It has been chosen to equip the French EPR NPP and complies with the state-of-the-art of the technology. Rolls-Royce has more than 30 years of experience in Instrumentation and Controls with more than 75 NPP units operating worldwide. All of this experience return has been put in this new generation of equipment to provide the customer with the best operation. About Rolls-Royce Rolls-Royce is a global business providing integrated power systems for use on land, at sea and in the air. The Group has a balanced business portfolio with leading market positions. Rolls-Royce has a broad range of civil nuclear expertise, including work related to licensing and safety reviews, engineering design

  13. PENGARUH ATRIBUT KEMASAN MAKANAN DAN KARAKTERISTIK KONSUMEN TERHADAP PEMBELIAN

    Directory of Open Access Journals (Sweden)

    Tri Hanifawati

    2017-04-01

    Full Text Available Tujuan penelitian ini adalah untuk mengetahui pengaruh atribut kemasan makanan dan karakteristik konsumen terhadap persepsi, pencarian informasi, pemilihan alternatif, dan perilaku setelah pembelian. Pengambilan data menggunakan teknik convenience sampling kepada 400 responden dan wawancara kepada asosiasi ritel dan industri makanan. Analisis data dengan menggunakan Interpretasi Skor Interval dan Seemingly Unrelated Regression. Hasil menunjukkan bahwa atribut kualitas dan fitur kemasan berpengaruh lebih besar terhadap semua tahapan keputusan pembelian. Secara simultan karakteristik responden berpengaruh signifikan terhadap persepsi, pemilihan alternatif, dan perilaku setelah pembelian. Intensitas belanja berpengaruh signifikan terhadap persepsi dan perilaku setelah pembelian; sedangkan umur, jenis kelamin, dan pendapatan berpengaruh signifikan terhadap pemilihan alternatif dan perilaku setelah pembelian. Implikasinya, IKM makanan perlu memberikan perhatian lebih besar terhadap atribut kemasan yang berpengaruh lebih besar.THE EFFECT OF FOOD PACKAGING AND CONSUMER CHARACTERISTICS ON PURCHASE BEHAVIORABSTRACTThis study aims to determine the effect of snack package attributes and consumer characteristics on the perception, information search, alternative selection, and after purchase behaviour. The survey wasdone by the convenience sampling technique to 400 respondents and interviewingretail and food industries association. Data analysiswas Interval Score interpretation and Seemingly Unrelated Regression. The results show that the quality attributes and package features have greater effect on all purchasing decision stages. The respondent characteristics, simultaneously, significantly affect the perception, information search, alternative selection, and after purchase behaviour. The shopping intensity significantly affect the perception and after purchase behaviour; while, age, gender, and income significantly affect the alternative selection and

  14. PENILAIAN PEDOFILIA MENGGUNAKAN RESPON HEMODINAMIK OTAK TERHADAP STIMULI SEKSUAL

    Directory of Open Access Journals (Sweden)

    Kuhelan Mahendran

    2015-09-01

    Full Text Available ABSTRAK Menilai secara akurat orientasi seksual seseorang sangat penting dalam melakukan penanganan terhadap pelaku kekerasan seksual pada anak. Phallometry adalah metode standar untuk mengidentifikasi orientasi seksual; tetapi, metode ini telah banyak dikritik oleh karena bersifat intrusif dan reliabilitasnya terbatas. Tujuan:Untuk mengevaluasi apakah pola respon spasial terhadap stimuli seksual yang ditandai oleh adanya perubahan blood oxygen level-dependent signal (BOLDmemfasilitasi proses identifikasi pedofilia. Desain:Selama dilakukan pemeriksaan magnetic resonance imaging fungsional (fMRI, ditampilkan gambar anak-anak dan dewasa tanpa busana dengan jenis kelamin sama atau berbeda terhadap sampel penelitian (kelompok pedofil dan kontrol. Kami mengkalkulasi perbedaan BOLDterhadap stimuli sexual anak-anak dan dewasa pada setiap sampel. Hasil foto dengan kontras kemudian dimasukkan sesuai dengan kelompoknya untuk dianalisis perbedaan pemetaan otak antara kelompok pedofil dan kontrol. Kami mengkalkulasi nilai ekspresi yang sesuai dengan hasil kelompok bagi setiap sampel. Nilai ekspresi tersebut dibedakan menjadi 2 algoritma klasifikasi: analisis Fisher linear discriminant dan analisis -nearest neighbor. Prosedur klasifikasi tersebut telah divalidasi silang menggunakan metode leave-one-out. Lokasi:Bagian Kedokteran Seksual, Fakultas Kedokteran Universitas Christian Albrechts di Kiel, Jerman. Sampel:Kami merekrut 24 sampel dengan pedofil yang memiliki ketertarikan seksual terhadap anak perempuan (n=11 atau laki-laki (n=13 pre pubertas dan 32 kontrol laki-laki sehat yang memiliki ketertarikan seksual terhadap wanita (n=18 atau pria (n=14 dewasa. Pengukuran luaran utama:Angka sensitivitasdan spesifisitas dari kedua algoritme klasifikasi. Hasil:Akurasi klasifikasi tertinggi dicapai dengan analisis diskriminan linear Fisher, yang menunjukkan akurasi rata-rata 95% (100% spesifisitas, 88% sensitivitas. Simpulan:Pola respon otak fungsional terhadap

  15. PENGARUH PENAMBAHAN UBI JALAR UNGU TERHADAP SIFAT ORGANOLEPTIK ES KRIM SUSU KAMBING PERANAKAN ETAWA [The Influence of Purple Sweet Potato Increment og Organoleptic Characteristic of Goat Milk Ice Cream of Etawa Generation

    Directory of Open Access Journals (Sweden)

    Susilawati Susilawati

    2014-12-01

    Full Text Available Goat milk is perishable foodstuffs and has  low shelf life. One way to preserve it is process goat milk into ice cream. This is usefulforreducingthe damagenutritiongoat milk. Purple sweet potatoes which contain some anthosianin can be added to inprove the texture. However, the amount of purple sweet potato  added will affect the texture and body of icecream.  Therfore this research is needed. This research was purposed to find concentration of purple sweet potato that will produce the best ice cream especially on organoleptic characteristic. The experiment was arranged in  Latin Square design in single factor that consist of 5 levels  concentrations of purple sweet potato paste. There were 0% (reference, 10%, 20%, 30%, and 40% (b/b with 5 replications. Data were analyzed using analysis of variance . furtehre tested using the HSD Test in 5% level of signiificance. The The results showed that addition of  30%  sweet potato paste produced the best quality of goat milk ice cream of Etawa . The score of aroma was 3,5 (not specific goat milk, the taste’s score was 3,47 (sweet, color’s score was 2,8 (rather purple, texture’s score was 3,5 (soft, and the overall  of acceptance was 3,203 (rather like. This ice cream contained water, protein, fat, ash, crude fiber, and total carbohidrate as amuch as 66,98%, protein was 5,5%, 11,86%, 1,34%, 0,3% and 14,2%. Keyword : goat milk, ice cream, purple sweet potato

  16. PENGARUH PENAMBAHAN UBI JALAR UNGU TERHADAP SIFAT ORGANOLEPTIK ES KRIM SUSU KAMBING PERANAKAN ETAWA [The Influence of Purple Sweet Potato Increment og Organoleptic Characteristic of Goat Milk Ice Cream of Etawa Generation

    Directory of Open Access Journals (Sweden)

    Susilawati Susilawati

    2014-10-01

    Full Text Available Goat milk is perishable foodstuffs and has  low shelf life. One way to preserve it is process goat milk into ice cream. This is usefulforreducingthe damagenutritiongoat milk. Purple sweet potatoes which contain some anthosianin can be added to inprove the texture. However, the amount of purple sweet potato  added will affect the texture and body of icecream.  Therfore this research is needed. This research was purposed to find concentration of purple sweet potato that will produce the best ice cream especially on organoleptic characteristic. The experiment was arranged in  Latin Square design in single factor that consist of 5 levels  concentrations of purple sweet potato paste. There were 0% (reference, 10%, 20%, 30%, and 40% (b/b with 5 replications. Data were analyzed using analysis of variance . further tested using the HSD Test in 5% level of signiificance. The The results showed that addition of  30%  sweet potato paste produced the best quality of goat milk ice cream of Etawa . The score of aroma was 3,5 (not specific goat milk, the taste’s score was 3,47 (sweet, color’s score was 2,8 (rather purple, texture’s score was 3,5 (soft, and the overall  of acceptance was 3,203 (rather like. This ice cream contained water, protein, fat, ash, crude fiber, and total carbohidrate as amuch as 66,98%, protein was 5,5%, 11,86%, 1,34%, 0,3% and 14,2%. Keywords : goat milk, ice cream, purple sweet potato

  17. PENGARUH FORMULASI PASTA LABU KUNING DAN TEPUNG BERAS KETAN PUTIH TERHADAP SIFAT KIMIA DAN SENSORI DODOL [The Effect of Formulation Pumpkin Paste and White Glutinous Rice Flour on Chemical and Sensory Properties Dodol

    Directory of Open Access Journals (Sweden)

    Hadi Hanggara

    2016-03-01

    Full Text Available The objective of this research was to study the effect formulation between pumpkin pasta and white glutinous rice flour on chemical and sensory properties of dodol. The research was a single factor, arranged in a Complete Randomized Design with six replications. The factor was the formulation of pumpkin pasta and white glutinous rice flour consisted of four levels, i.e. 10 : 90 (L1; 20 : 80 (L2; 30 : 70 (L3; 40 : 60 (L4; 50 : 50 (L5; and 60 : 40 (L6.  The data were analyzed by using ANOVA and were further tested with LSD test at 5% level of significant. The results showed that the ratio of pumpkin paste and white glutinous rice flour significantly affected the chemical (moisture and sucrose contents and  sensory properties (texture, color, taste, flavor and overall acceptance of dodol.  The best formulation was found on dodol produced from 50% pumpkin paste and 50% white glutinous rice flour (L5 with the moisture content of 22,51%, sucrose content of 33,67%, total carotenoids content of 1,16 µg/g, fat content of 23,12%, with the texture score of 2,71 (rather elastic, color score of  3,97 (yellow-brown, taste score of 3,75 (feel pumpkin, flavor score of 3,50 (flavorful pumpkin and the overall acceptance of 3,51 (like. Keywords:  dodol, pumpkin, white glutinous rice

  18. PENGARUH FORMULASI PASTA LABU KUNING DAN TEPUNG BERAS KETAN PUTIH TERHADAP SIFAT KIMIA DAN SENSORI DODOL [The Effect of Formulation Pumpkin Paste and White Glutinous Rice Flour on Chemical and Sensory Properties Dodol

    OpenAIRE

    Hadi Hanggara; Sussi Astuti; Sri Setyani

    2016-01-01

    The objective of this research was to study the effect formulation between pumpkin pasta and white glutinous rice flour on chemical and sensory properties of dodol. The research was a single factor, arranged in a Complete Randomized Design with six replications. The factor was the formulation of pumpkin pasta and white glutinous rice flour consisted of four levels, i.e. 10 : 90 (L1); 20 : 80 (L2); 30 : 70 (L3); 40 : 60 (L4); 50 : 50 (L5); and 60 : 40 (L6).  The data were analyzed by using ANO...

  19. EFEK KONSUMSI MINUMAN BUBUK KAKAO (Theobroma cacao L. BEBAS LEMAK TERHADAP SIFAT ANTIOKSIDATIF LIMFOSIT SUBYEK PEREMPUAN [The Effect of Fat Free Cocoa (Theobroma Cacao L. Powder Drinks Consumption on Antioxidative Activity of Lymphocyte of Women Subjects

    Directory of Open Access Journals (Sweden)

    Erniati1

    2012-06-01

    Full Text Available The health benefits of cocoa both in vivo and in vitro have been reported in many studies. Cocoa is a rich source of flavonoids known to have antioxidant activity, such as catechin, epicatechin and procyanidin. The aim of this research was to evaluate the effect of fat free cocoa powder drink consumption on antioxidative properties and proliferation activities of woman lymphocyte. Healthy woman subjects were divided into cocoa group (n = 9 and control group (n = 9. Cocoa powder drink containing skim milk and sugar was given to the cocoa groups every morning for 25 days. The control group received only water containing skim milk and sugar. Both cocoa and control group received physical medical checkup at the beginning and at the end of the intervention. Their peripheral blood was taken for lymphocyte antioxidant analysis. The measured antioxidant properties consisted of antiradical activity by DPPH method, malonaldehyde (MDA and glutathione levels. The data of cocoa group showed that there was a significant increase (p ≤ 0.05 in antiradical level from 31+11.2 to 40.19+7.42% and glutathione from 48.2±10.5 to 66.7±15.9 μmol/land a decrease in MDA level in the lymphocyte (p < 0.05 from 2.98±2.21 to 1.29±0.33 μmol/las compared to the control group (from 25.77±6.9 to 26.79±6.12%; 34.7±20.7 to 37.8±19.2 μmol/land 3.01±1.53 to 2.069±0.707 μmol/l respectively after consumption of the cocoa powder drink. The results of this research revealed that fat free cocoa powder has a strong antioxidant activity which was manifested up to the blood cells.

  20. PENGARUH JENIS LARUTAN PERENDAM SERTA METODE PENGERINGAN TERHADAP SIFAT FISIK, KIMIA, DAN FUNGSIONAL GELATIN DARI KULIT CUCUT [The Influence of Solvent Variety and Drying Method on Physical, Chemical and Functional Characteristic of Shark Skin Gelatin

    Directory of Open Access Journals (Sweden)

    Made Astawan 1

    2003-04-01

    Full Text Available Gelatin is a denaturation product of collagen and has been widely utilized for foods, photography uses, medical materials, and culture materials for microorganisms. Recently, gelatin’s uses has expanded to new applications such as health foods. Gelatin of land animal origin such as bovine and porcine has been mainly used. However, gelatin with new properties is desired to develop expanded applications. In this research gelatin was made from shark skin. The shark skin collagen was distended by acetic acid solution (acid process and sodium hydroxide solution (alkali process, and gelatin was then extracted at 80oC of water. The extracted gelatin was dried by vacuum drying and freeze drying to obtain powder product. Shark gelatin produced by the combination of alkali and vacuum drying process (OVB gelatin had better qualities on yield, water content, gel strength, melting point, and emulsion stability as compared to the others. Sensory evaluation indicated that shark gelatin had lower values in color, odor, and performance as compared to the commercial gelatin of fish, pig and bovine (SKW Biosystem. However, as compared to the commercial gelatins, OVB gelatin had a similar values on gel strength (202 bloom and emulsion stability (100%, but higher values on viscosity (8 cP and pH (9.3. Those values indicated that ray skin gelatin can be used to substitute the commercial gelatin in some food industries

  1. PENGARUH DEKSTRIN DAN GUM ARAB TERHADAP SIFAT KIMIA DAN FISIK BUBUK SARI JAGUNG MANIS (Zeamays saccharata [The Effects of Dextrin and Arabic Gum on Chemical and Physical Properties of Sweet Corn (Zeamays saccharata Milk-like Powder

    Directory of Open Access Journals (Sweden)

    Sutardi*

    2010-12-01

    Full Text Available The aim of this research was to determine the effects of type and amount of binder on the chemical and physical properties of sweet corn milk-like powder. Sweet corn milk-like powder was prepared from sweet corn kernel extracted with water with ratio of water and kernel of 2:1 (v/w, then dehydrated by spray dryer. Dextrin and arabic gum in various amount i.e. 2.5; 5.0; and 7.5% (w/v, respectively were added to the sweet corn milk-like before drying, and control was also made. The reducing sugar and total sugar, protein, fat, and moisture content, and as well as bulk density, colour, and solubility of the powder were then analyzed. The chemical and physical properties of sweet corn milk-like powder with addition of dextrin and arabic gum in the amount of 2.5; 5.0; and 7.5% (w/v were significantly different (p > 0.05. According to all aspects studied, sweet corn milk-like powder with addition of dextrin in the amount of 2.5% was the best product of all, which had reducing sugar of 5.00% (db; total sugar 17.01% (db; protein13.67% (db; fat 5.97% (db; moisture 5.38%; bulk density 0.47 g/cm3; and solubility of 93.70%.

  2. EFFECT OF PRETREATMENTS ON CHEMICAL AND ANTIOXIDANT PROPERTIES OF SKY FRUIT (Swietenia macrophylla SEED OIL [Pengaruh Pra-perlakuan Terhadap Sifat Kimia dan Antioksidan Minyak Biji Buah Tunjuk Langit (Swietenia macrophylla

    Directory of Open Access Journals (Sweden)

    Hayati Mohd Yusof

    2012-12-01

    Full Text Available The objective of this study was to investigate the effect of pretreatments on chemical and antioxidant properties of sky fruit (Swietenia macrohylla seed oil. The seeds were treated with different heat pretreatments (roasting, steaming, and microwaving and subsequently subjected to oil extraction by using a Bligh and Dyer method. It was found that different pretreatments significantly (p<0.05 affected yield and peroxide value of the extracted oils. However, no significant effect of pretreatment was observed on free fatty acid content of the seed oils. The oils exhibited significantly different levels of 1, 1-diphenyl-2-picrylhydrazyl (DPPH scavenging activity due to different heat pretreatments. The results revealed that the mean percentages of DPPH scavenging activity of untreated (control seed oil (87.69% and steamed seed oil (83.40% were significantly higher than those of roasted seed oil (75.71% as well as the microwaved one (63.98%. In contrast, the pretreatments did not significantly affect total phenolic content (TPC of the seed oils with the TPC mean values ranging from 0.016 to 0.022 mg/g (as gallic acid. Data gained from this study provided valuable information for edible oil industries in searching for alternative source of edible oil with medicinal benefits.

  3. PENGARUH KEPEMIMPINAN DAN KOMUNIKASI GURU TERHADAP MOTIVASI BELAJAR

    Directory of Open Access Journals (Sweden)

    - Husin

    2011-06-01

    Full Text Available Permasalahan dalam penelitian ini adalah seberapa besar pengaruh kepemimpinan dan komunikasi guru terhadap motivasi belajar siswa. Populasi dalam penelitian ini adalah seluruh siswa kelas XII jurusan Administrasi Perkantoran yang terdiri dari 77 siswa. Berdasarkan hasil penelitian menunjukkan bahwa ada pengaruh yang positif pada kepemimpinan guru dan komunikasi guru terhadap motivasi belajar siswa. Dalam upaya meningkatkan motivasi belajar siwa hendaknya kepemimpinan guru diterapkan pada siswa sehingga guru dapat membimbing dan mendorong siswa untuk lebih giat belajar, guru diharapkan dapat meningkatkan kemampuan komunikasinya agar pada saat penyampaian materi dapat diterima siwa dengan baik. Kata Kunci : Motivasi Belajar, Kepemimpinan Guru, Komunikasi Guru

  4. Raman spectroscopy of boron-doped single-layer graphene.

    Science.gov (United States)

    Kim, Yoong Ahm; Fujisawa, Kazunori; Muramatsu, Hiroyuki; Hayashi, Takuya; Endo, Morinobu; Fujimori, Toshihiko; Kaneko, Katsumi; Terrones, Mauricio; Behrends, Jan; Eckmann, Axel; Casiraghi, Cinzia; Novoselov, Kostya S; Saito, Riichiro; Dresselhaus, Mildred S

    2012-07-24

    The introduction of foreign atoms, such as nitrogen, into the hexagonal network of an sp(2)-hybridized carbon atom monolayer has been demonstrated and constitutes an effective tool for tailoring the intrinsic properties of graphene. Here, we report that boron atoms can be efficiently substituted for carbon in graphene. Single-layer graphene substitutionally doped with boron was prepared by the mechanical exfoliation of boron-doped graphite. X-ray photoelectron spectroscopy demonstrated that the amount of substitutional boron in graphite was ~0.22 atom %. Raman spectroscopy demonstrated that the boron atoms were spaced 4.76 nm apart in single-layer graphene. The 7-fold higher intensity of the D-band when compared to the G-band was explained by the elastically scattered photoexcited electrons by boron atoms before emitting a phonon. The frequency of the G-band in single-layer substitutionally boron-doped graphene was unchanged, which could be explained by the p-type boron doping (stiffening) counteracting the tensile strain effect of the larger carbon-boron bond length (softening). Boron-doped graphene appears to be a useful tool for engineering the physical and chemical properties of graphene.

  5. Laser-induced photochemical enrichment of boron isotopes

    International Nuclear Information System (INIS)

    Freund, S.M.; Ritter, J.J.

    1976-01-01

    A boron trichloride starting material containing both boron-10 isotopes and boron-11 isotopes is selectively enriched in one or the other of these isotopes by a laser-induced photochemical method involving the reaction of laser-excited boron trichloride with either H 2 S or D 2 S. The method is carried out by subjecting a low pressure gaseous mixture of boron trichloride starting material and the sulfide to infrared radiation from a carbon dioxide TE laser. The wave length of the radiation is selected so as to selectively excite one or the other of boron-10 BCl 3 molecules or boron-11 BCl 3 molecules, thereby making them preferentially more reactive with the sulfide. The laser-induced reaction produces both a boron-containing solid phase reaction product and a gaseous phase containing mostly unreacted BCl 3 and small amounts of sulfhydroboranes. Pure boron trichloride selectively enriched in one of the isotopes is recovered as the primary product of the method from the gaseous phase by a multi-step recovery procedure. Pure boron trichloride enriched in the other isotope is recovered as a secondary product of the method by the subsequent chlorination of the solid phase reaction product followed by separation of BCl 3 from the mixture of gaseous products resulting from the chlorination

  6. Higher boron rejection with a new TFC forward osmosis membrane

    KAUST Repository

    Valladares Linares, Rodrigo; Li, Zhenyu; Sarp, Sarper; Park, Y. G.; Amy, Gary L.; Vrouwenvelder, Johannes S.

    2014-01-01

    Due to the stringent limits for boron in drinking and irrigation water, water treatment facilities have to incur additional treatment to remove boron down to a safe concentration. Forward osmosis (FO) is a membrane technology that may reduce the energy required to remove boron present in seawater. In direct FO desalination hybrid systems, fresh water is recovered from seawater using a recoverable draw solution, FO membranes are expected to show high boron rejection. This study focuses on determining the boron rejection capabilities of a new generation thin-film composite (TFC) FO membrane compared to a first generation cellulose triacetate (CTA) FO membrane. The effects of water permeate flux, membrane structure, draw solute charge, and reverse solute flux on boron rejection were determined. For TFC and CTA FO membranes, experiments showed that when similar operating conditions are applied (e.g. membrane type and draw solute type) boron rejection decreases with increase in permeate flux. Reverse draw solute flux and membrane fouling have no significant impact on boron rejection. Compared to the first generation CTA FO membrane operated at the same conditions, the TFC FO membrane showed a 40% higher boron rejection capability and a 20% higher water flux. This demonstrates the potential for boron removal for new generation TFC FO membranes. © 2014 © 2014 Balaban Desalination Publications. All rights reserved.

  7. ISOBORDAT: An Online Data Base on Boron Isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Pennisi, M.; Adorni-Braccesi, A.; Andreani, D.; Gori, L.; Gonfiantini, R. [Istituto di Geoscienze e Georisorse, CNR, Pisa (Italy); Sciuto, P. F. [Servizio Geologico, Sismico e dei Suoli, D.G. Ambiente e Difesa del Suolo e della Costa, Regione Emilia Romagna, Bologna (Italy)

    2013-07-15

    From 1986, boron isotope data in natural substances increased sharply in scientific publications. Analytical difficulties derived from complex geochemical matrices have been faced and interlaboratory calibrations reported in the boron literature. Boron isotopes are nowdays applied to investigate boron origin and migration in natural waters, sources of boron contamination, water-rock interactions and also contribute to water resource management. This is especially important in those areas where boron content exceeds the local regulations for drinking water supply and boron sources need to be identified. ISOBORDAT, an interactive database on boron isotope composition and content in natural waters is presented to the wider community of boron isotope users. The database's structure, scope and applications are reported, along with a discussion on {delta}{sup 11}B values obtained in Italian waters. In the database boron data are structured in the following categories: rainwater, rivers, lakes, groundwater and potential contaminants. New categories (medium and high enthalpy fluids from volcanic and geothermal areas) are anticipated. ISOBORDAT aims to be as interactive as possible and will be developed taking into account information and suggestions received. The database is continually undergoing revision to keep pace with continuous data publication. Indications of data that are missing at present are greatly appreciated. (author)

  8. Synthesis and characterization of ammonium phosphate fertilizers with boron

    Directory of Open Access Journals (Sweden)

    ANGELA MAGDA

    2010-07-01

    Full Text Available The concentration of boron, an essential micronutrient for plants, presents a narrow range between deficiency and toxicity. In order to provide the boron requirement for plants, and to avoid toxicity problems, boron compounds are mixed with basic fertilizers. Sodium borate pentahydrate was used as a boron source. Ammonium orthophosphates fertilizers with boron were prepared by neutralizing phosphoric acid with ammonia and addition of variable amounts of sodium tetraborate pentahydrate to the reaction mixture at a NH3:H3PO4 molar ratio of 1.5. The fertilizers obtained with boron contents ranging from 0.05 to 1 % (w/w were fully characterized by chemical analysis, thermal analysis, X-ray diffraction and infrared spectrophotometry. The studies showed that up to 500 °C, regardless of the boron content, no significant changes concerning thermal stability and nutritional properties occurred. Above 500 °C, an increase of thermal stability with an increase of the boron content was observed. X-Ray diffraction of a heat-treated sample containing 5 % (w/w boron indicated the appearance of boron orthophosphate, BPO4, as a new crystalline phase, and the disappearance of the previous structures above 500 °C, which explains the increase in thermal stability.

  9. Higher boron rejection with a new TFC forward osmosis membrane

    KAUST Repository

    Valladares Linares, Rodrigo

    2014-07-17

    Due to the stringent limits for boron in drinking and irrigation water, water treatment facilities have to incur additional treatment to remove boron down to a safe concentration. Forward osmosis (FO) is a membrane technology that may reduce the energy required to remove boron present in seawater. In direct FO desalination hybrid systems, fresh water is recovered from seawater using a recoverable draw solution, FO membranes are expected to show high boron rejection. This study focuses on determining the boron rejection capabilities of a new generation thin-film composite (TFC) FO membrane compared to a first generation cellulose triacetate (CTA) FO membrane. The effects of water permeate flux, membrane structure, draw solute charge, and reverse solute flux on boron rejection were determined. For TFC and CTA FO membranes, experiments showed that when similar operating conditions are applied (e.g. membrane type and draw solute type) boron rejection decreases with increase in permeate flux. Reverse draw solute flux and membrane fouling have no significant impact on boron rejection. Compared to the first generation CTA FO membrane operated at the same conditions, the TFC FO membrane showed a 40% higher boron rejection capability and a 20% higher water flux. This demonstrates the potential for boron removal for new generation TFC FO membranes. © 2014 © 2014 Balaban Desalination Publications. All rights reserved.

  10. PENGARUH MODAL INTELEKTUAL DAN KEPUASAN KERJA TERHADAP KINERJA PEGAWAI SERTA DAMPAKNYA TERHADAP LOYALITAS PEGAWAI CUSTOMER SERVICES HOTEL BERBINTANG EMPAT DI KOTA BANDUNG

    Directory of Open Access Journals (Sweden)

    Donni Juni Priansa

    2016-03-01

    Berdasarkan hasil penelitian , dapat disimpulkan bahwa modal intelektual dan kepuasan kerja berpengaruh positif dan signifikan terhadap kinerja pegawai; serta modal intelektual, kepuasan kerja, dan kinerja pegawai berpengaruh positif dan signifikan terhadap loyalitas pegawai hotel berbintang empat di Kota Bandung. Dengan demikian, maka modal intelektual, kepuasan kerja, dan kinerja pegawai perlu dioptimalkan. Kata Kunci: Modal Intelektual Kepuasan Kerja, Kinerja Pegawai, dan Loyalitas Pegawai

  11. Pengaruh Word Of Mouth terhadap Keputusan Pembelian dan Kepuasan Konsumen (Studi pada Konsumen Kober Mie Setan Jalan Simpang Soekarno-hatta Nomor 1-2 Malang)

    OpenAIRE

    Ajie Nugraha, Finnan Aditya

    2015-01-01

    Penelitian ini bertujuan untuk menjelaskan tentang: pengaruh word of mouth terhadap keputusan pembelian, pengaruh keputusan pembelian terhadap kepuasan konsumen, pengaruh word of mouth terhadap kepuasan konsumen, dan pengaruh word of mouth terhadap kepuasan konsumen melalui keputusan pembelian. Jenis penelitian yang digunakan adalah penelitian penjelasan atau explanatory research dengan pendekatan kuantitatif. Populasi dari penelitian ini adalah konsumen kober mie setan yang membeli berdasark...

  12. Pengaruh Relationship Marketing Dan Customer Satisfaction Terhadap Customer Loyalty Pada Penjualan Sepeda Motor Honda Di PT Enam Tiga Sejahtera Tahun 2013

    OpenAIRE

    ., Kadek Rai Suwena, S.Pd., M.Pd.; ., Dr. Iyus Akhmad Haris,M.Pd; ., Jumati

    2014-01-01

    Penelitian ini bertujuan untuk mengetahui pengaruh; (1) relationship marketing terhadap customer satisfaction, (2) relationship marketing terhadap customer loyalty, (3) customer satisfaction terhadap customer loyalty, (4) pengaruh relationship marketing terhadap customer loyalty melalui customer satisfaction. Populasi dalam penelitian ini adalah pelanggan yang telah membeli membeli sepeda motor Honda di PT Enam Tiga Sejahtera tahun 2013, jumlah sampel sebanyak 97 responden, dengan teknik peng...

  13. PENGARUH KONFLIK INTERPERSONAL, WORK-FAMILY CONFLICT DAN STRES, TERHADAP KEPUASAN KERJA DAN DAMPAKNYA TERHADAP KEPUASAN HIDUP

    Directory of Open Access Journals (Sweden)

    Adnan Rajak

    2015-11-01

    Full Text Available AbstractThis research aims to analyze that the effect of interpersonal conflict, work family on work stress and job satisfacton, effect of work stress on job satisfactin, dan effect of job satisfaction on life satisfaction at Civil Servant Secretariat of Ministry of Eduacation and Cultural. Research Method that used is survey method at fixed lecturer of Secretariat of Ministry. This Research Type is the verification descriptive. Sample size research this is the 200 Civil Servant and the technique used strafied random sampling. Method that used to test of hypothesis is Structural Equation Modeling (SEM. The result of the study, (1 Conflict of interpersonal positive effect on the work stress, (2 Work-family conflict negative effect on the Work stress, (3 Conflict of interpersonal negative effect on the Job satisfaction, (4 Work-family conflict negative effect on the Job satisfaction, (5 Work Stress negative effect on the Job satisfaction, and (6 Job satisfaction positive effect on the Life satisfaction. Recommendation of this study is the Secretariat of Ministry should manage interpersonal conflict and family conflict in a way to identify and evaluate accurately through approaches, Collaborating, problem solving, Avoiding, Competing and Accommodating. While the employee stress can be done through the Individual and organizational approach.Keywords: Interpersonal Conflict, Work Family Conflict, Work Stress, Job Satisfaction, and Life SatisfactionAbstrakTujuan dalam penelitian ini adalah untuk mengetahui pengaruh konflik interpersonal, work-family conflict, terhadap stres kerja dan kepuasan kerja, serta pengaruh stres kerja terhadap kepuasan kerja dan kepuasan kerja terhada Kepuasan Hidup PNS pada Sekretariat Jenderal Kementerian Pendidikan dan Kebudayaan. Metode penelitian yang digunakan adalah metode survey pada PNS Sekretariat Jenderal. Ukuran sampel penelitian ini adalah 200 PNS dan menggunakan teknik strafied random sampling. Meode yang

  14. Analisa Pengaruh Corporate Social Responsibility Terhadap Brand Image Dan Customer Loyalty Di Pop! Hotels Indonesia

    OpenAIRE

    Livia, Astrid; Gladys, Gladys

    2017-01-01

    Penelitian ini dilakukan untuk menganalisa pengaruh CSR terhadap brand image dan customer loyalty pada Pop! Hotels di Indonesia. Penelitian ini menggunakan pendekatan kuantitatif kausal dengan bantuan penyebaran kuesioner yang dibagikan kepada 200 responden yang pernah menginap di Pop! Hotels di Indonesia. Hasil penelitian menunjukkan bahwa CSR berpengaruh positif dan signifikan terhadap brand image dan customer loyalty. Selain itu CSR juga berpengaruh secara tidak langsung terhadap customer ...

  15. Hubungan Pengajaran Mata Kuliah Ekonomi Islam terhadap Minat Mahasiswa Menabung di Bank Syariah

    Directory of Open Access Journals (Sweden)

    Endang Mintarja

    2017-07-01

    Full Text Available Penelitian ini bertujuan untuk untuk mengamati hubungan antara pengajaran mata kuliah Ekonomi Islam di perguruan tinggi terhadap minat mahasiswa untuk menabung di Bank Syariah. Penelitian ini merupakan penelitian deskripstif-kuantitatif dengan mengambil kasus mahasiswa STIE Ahmad Dahlan Jakarta. Berdasarkan hasil penelitian menyimpulkan bahwa terhadap hubungan yang signifikan antara materi Ekonomi Islam, intensitas belajar, dan pemahaman mahasiswa terhadap minat menabung di Bank Syariah.

  16. Pengaruh Weight Training Dan Body Weight Training Terhadap Power Tungkai Atlet Bola Tangan

    OpenAIRE

    Ahmad Nasrullah,, Rizki Muhammad Afif

    2016-01-01

    Belum diketahuinya latihan berpengaruh untuk meningkatkan power tungkai atlet bola tangan. Penelitian ini bertujuan untuk: (1) mengetahui pengaruh weight training terhadap power otot tungkai atlet bola tangan, (2) mengetahui pengaruh body weight training terhadap power otot tungkai atlet bola tangan, dan (3) mengetahui metode latihan yang lebih berpengaruh antara weight training dan body weight training terhadap power otot tungkai atlet bola tangan.Penelitian ini adalah eksperimen dengan desa...

  17. Pengaruh Penerapan E-filing, Tingkat Pemahaman Perpajakan dan Kesadaran Wajib Pajak terhadap Kepatuhan Wajib Pajak di Kpp Pratama YOGYAKARTA

    OpenAIRE

    Agustiningsih, Wulandari; Isroah, Isroah

    2016-01-01

    Penelitian ini bertujuan untuk mengetahui (1) Pengaruh penerapan e-filing terhadap kepatuhan wajib pajak. (2) Pengaruh tingkat pemahaman perpajakan terhadap kepatuhan wajib pajak. (3) Pengaruh kesadaran wajib pajak terhadap kepatuhan wajib pajak. (4) Pengaruh penerapan e-filing, tingkat pemahaman perpajakan dan kesadaran wajib pajak terhadap kepatuhan wajib pajak. Populasi penelitian ini adalah Wajib Pajak pengguna e-filing di KPP Pratama Yogyakarta deng...

  18. KAJIAN TERHADAP BEBERAPA METODE PENYUSUTAN DAN PENGARUHNYA TERHADAP PERHITUNGAN BEBAN POKOK PENJUALAN (COST OF GOOD SOLD

    Directory of Open Access Journals (Sweden)

    Juniady Slamed Setiawan

    2001-01-01

    Full Text Available Every company must generate financial statement, that provide information about income, changes in financial position to whom that concerned. In preparing financial statement, each company has a power to choose the accounting methods and technics that recommended by Financial Accounting Standard. Accounting policies adopted by firm has a substanstial impact in financial statement.Therefore the company that has equal performance will report different result.This article try to present the impact of choosing depreciation method in calculating cost of goods sold. Abstract in Bahasa Indonesia : Setiap perusahaan wajib menerbitkan laporan keuangan, yang memberikan informasi mengenai hasil usaha, perubahan posisi keuangan kepada pihak yang memerlukan. Dalam menyusun laporan keuangan, perusahaan memiliki keleluasaan untuk memilih metode dan teknik sepanjang metode yang dipilih tersebut ada dalam SAK (Standar Akuntansi Keuangan. Pemilihan metode akuntansi memiliki dampak yang sangat besar terhadap laporan keuangan yang dihasilkan. Dengan demikian dimungkinkan perusahaan yang sebenarnya memiliki kinerja yang sama dapat melaporkan hasil yang berbeda. Tulisan ini mencoba untuk mengetengahkan dampak pemilihan metode penyusutan terhadap perhitungan beban pokok penjualan (cost of goods sold. Kata kunci: metode penyusutan, beban penyusutan, aktiva tetap, beban pokok penjualan.

  19. Pengaruh Suhu Pasteurisasi dan Lama Penyimpanan Terhadap Mutu Juice Belimbing (Averrhoa carambola L.)

    OpenAIRE

    Armayana

    2012-01-01

    Penelitian ini bertujuan untuk mengetahui pengaruh suhu pasteurisasi dan lama penyimpanan terhadap mutu juice belimbing ( Averrhoa carambola L.). Penelitian Menggunakan Rancangan Acak Lengkap Faktorial dua faktor. 950305004

  20. Boron autoradiography method applied to the study of steels

    International Nuclear Information System (INIS)

    Gugelmeier, R.; Barcelo, G.N.; Boado, J.H.; Fernandez, C.

    1986-01-01

    The boron state, contained in the steel microestructure, is determined. The autoradiography by neutrons is used, permiting to obtain boron distribution images by means of additional information which is difficult to acquire by other methods. The application of the method is described, based on the neutronic irradiation of a polished steel sample, over which a celulose nitrate sheet or other appropriate material is fixed to constitute the detector. The particles generated by the neutron-boron interaction affect the detector sheet, which is subsequently revealed with a chemical treatment and can be observed at the optical microscope. In the case of materials used for the construction of nuclear reactors, special attention must be given to the presence of boron, since owing to the exceptionaly high capacity of neutron absorption, lowest quantities of boron acquire importance. The adaption of the method to metallurgical problems allows the obtainment of a correlation between the boron distribution images and the material's microstructure. (M.E.L.) [es

  1. Evolution of anisotropy in bcc Fe distorted by interstitial boron

    Science.gov (United States)

    Gölden, Dominik; Zhang, Hongbin; Radulov, Iliya; Dirba, Imants; Komissinskiy, Philipp; Hildebrandt, Erwin; Alff, Lambert

    2018-01-01

    The evolution of magnetic anisotropy in bcc Fe as a function of interstitial boron atoms was investigated in thin films grown by molecular beam epitaxy. The thermodynamic nonequilibrium conditions during film growth allowed one to stabilize an interstitial boron content of about 14 at .% accompanied by lattice tetragonalization. The c /a ratio scaled linearly with the boron content up to a maximum value of 1.05 at 300 °C substrate growth temperature, with a room-temperature magnetization of. In contrast to nitrogen interstitials, the magnetic easy axis remained in-plane with an anisotropy of approximately -5.1 ×106erg /cm3 . Density functional theory calculations using the measured lattice parameters confirm this value and show that boron local ordering indeed favors in-plane magnetization. Given the increased temperature stability of boron interstitials as compared to nitrogen interstitials, this study will help to find possible ways to manipulate boron interstitials into a more favorable local order.

  2. Synthesis of Boron Nano wires, Nano tubes, and Nano sheets

    International Nuclear Information System (INIS)

    Patel, R.B.; Chou, T.; Iqbal, Z.

    2014-01-01

    The synthesis of boron nano wires, nano tubes, and nano sheets using a thermal vapor deposition process is reported. This work confirms previous research and provides a new method capable of synthesizing boron nano materials. The materials were made by using various combinations of MgB 2 , Mg(BH 4 ) 2 , MCM-41, NiB, and Fe wire. Unlike previously reported methods, a nanoparticle catalyst and a silicate substrate are not required for synthesis. Two types of boron nano wires, boron nano tubes, and boron nano sheets were made. Their morphology and chemical composition were determined through the use of scanning electron microscopy, transmission electron microscopy, and electron energy loss spectroscopy. These boron-based materials have potential for electronic and hydrogen storage applications.

  3. Influence of dopants, particularly carbon, on β-rhombohedral boron

    Science.gov (United States)

    Werheit, H.; Flachbart, K.; Pristáš, G.; Lotnyk, D.; Filipov, V.; Kuhlmann, U.; Shitsevalova, N.; Lundström, T.

    2017-09-01

    Due to the high affinity of carbon to boron, the preparation of carbon-free boron is problematic. Even high-purity (6 N) β-rhombohedral boron contains 30-60 ppm of C. Hence, carbon affects the boron physical properties published so far more or less significantly. We studied well-defined carbon-doped boron samples based on pure starting material carefully annealed with up to about 1% C, thus assuring homogeneity. We present and discuss their electrical conductivity, optical absorption, luminescence and phonon spectra. Earlier attempts of other authors to determine the conductivity of C-doped boron are revised. Our results allow estimating the effects of oxygen and iron doping on the electrical conductivity using results taken from literature. Discontinuities at low T impair the electronic properties.

  4. Analisis Pengaruh Faktor Organisasi, Individu, Dan Lingkungan Terhadap Kinerja Karyawan Departemen Front Office Hotel Shangri-la Surabaya

    OpenAIRE

    Yonggara, Natalia; Gresia, Neria

    2014-01-01

    Penelitian ini dilakukan di Hotel Shangri-La Surabaya, terhadap populasi sebanyak 50 responden. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh faktor organisasi, individu, dan lingkungan terhadap kinerja karyawan departemen Front Office. Berdasarkan hasil penelitian, diperoleh pengaruh yang signifikan secara serempak pada faktor organisasi, individu, dan lingkungan terhadap kinerja karyawan. Sedangkan pengaruh yang signifikan secara parsial pada faktor individu dan lingkungan. Fa...

  5. Pengaruh Literasi Ekonomi dan Gaya Hidup terhadap Perilaku Konsumtif Mahasiswa Jurusan Pendidikan Ekonomi Universitas Pendidikan Ganesha Tahun 2015

    OpenAIRE

    ., Drs. I Made Nuridja, M.Pd.; ., Dr. Iyus Akhmad Haris,M.Pd; ., Dias Kanserina

    2015-01-01

    Penelitian ini bertujuan untuk mengetahui (1) pengaruh literasi ekonomi terhadap perilaku konsumtif Mahasiswa Jurusan Pendidikan Ekonomi Undiksha, (2) pengaruh gaya hidup terhadap perilaku konsumtif Mahasiswa Jurusan Pendidikan Ekonomi Undiksha, (3) pengaruh literasi ekonomi dan gaya hidup terhadap perilaku konsumtif Mahasiswa Jurusan Pendidikan Ekonomi Undiksha. Subjek penelitian ini adalah Mahasiswa Jurusan Pendidikan Ekonomi Universitas Pendidikan Ganesha berjumlah 111 mahasiswa dengan obj...

  6. Pulverization of boron element and proportions of boron carbide in boron; Broyage de bore element et dosage de carbure de bore dans le bore

    Energy Technology Data Exchange (ETDEWEB)

    Lang, F M; Finck, C [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1956-07-01

    It is possible to reduce boron element into fine powder by means of a mortar and pestle made of sintered boron carbide, the ratio of boron carbide introduced being less than one per cent. Boron element at our disposal is made of sharp edged, dark brown, little grains of average size greater than 5 {mu}. Grain sizes smaller than 1{mu} are required for applying thin layers of such boron. (author) [French] Il est possible de pulveriser finement du bore element au moyen de mortier et pilon en carbure de bore fritte, le taux de carbure de bore introduit etant inferieur a 1 pour cent. Le bore element dont nous disposons est constitue de petits grains brun fonce, a aretes vives, de dimension moyenne superieure a 5 {mu}. L'application de ce bore en couches minces demande des grains de dimensions inferieures a 1 {mu}. (aute0008.

  7. Pemetaan Risiko Tsunami terhadap Bangunan secara Kuantitatif

    Directory of Open Access Journals (Sweden)

    Totok Wahyu Wibowo

    2017-12-01

    Full Text Available ABSTRAK Tsunami merupakan bencana alam yang sebagian besar kejadiannya dipicu oleh gempabumi dasar laut. Dampak kerugian tsunami terhadap lingkungan pesisir antara lain rusaknya properti, struktur bangunan, infrastruktur dan dapat mengakibatkan gangguan ekonomi. Bencana tsunami memiliki keunikan dibandingkan bencana lainnya, karena memiliki kemungkinan sangat kecil tetapi dengan ancaman yang tinggi. Paradigma Pengurangan Risiko Bencana (PRB yang berkembang dalam beberapa tahun terakhir yang menekankan bahwa risiko merupakan hal utama dalam penentuan strategi terhadap bencana. Kelurahan Ploso, merupakan salah satu lokasi di Kabupaten Pacitan yang berpotensi terkena bencana tsunami. Pemetaan risiko bangunan dilakukan dengan metode kuantitatif, yang mana disusun atas peta kerentanan dan peta harga bangunan. Papathoma Tsunami Vulnerability 3 (PTVA-3 diadopsi untuk pemetaan kerentanan. Data harga bangunan diperoleh dari kombinasi kerja lapangan dan analisis Sistem Informasi Geografis (SIG. Hasil pemetaan risiko menunjukkan bahwa Lingkungan Barehan memiliki risiko kerugian paling tinggi diantara semua lingkungan di Kelurahan Ploso. Hasil ini dapat dijadikan sebagai acuan untuk penentuan strategi pengurangan risiko bencana di Kelurahan Ploso. ABSTRACT Tsunami is a natural disaster whose occurrences are mostly triggered by submarine earthquakes. The impact of tsunami on coastal environment includes damages to properties, building structures, and infrastructures as well as economic disruptions. Compared to other disasters, tsunamis are deemed unique because they have a very small occurrence probability but with a very high threat. The paradigm of Disaster Risk Reduction (DRR that has developed in the last few years stresses risk as the primary factor to determine disaster strategies. Ploso Sub-district, an area in Pacitan Regency, is potentially affected by tsunamis. The risk mapping of the buildings in this sub-district was created using a quantitative

  8. PENGARUH PERENCANAAN PAJAK TERHADAP NILAI PERUSAHAAN

    Directory of Open Access Journals (Sweden)

    Hetti Herawati

    2016-04-01

    Full Text Available Abstract. For the Government, taxes are a source of the highest acceptance it is desirable at this point with the contribution of approximately 70% when compared to other admissions resources. As a major state income tax, became an extra burden for the company because it can reduce the value of the net profit of the company. Given the tax burden is to be borne by the company, then the company is working to its fullest in order to minimize the tax burden, by making tax planning. The purpose of this research is to know the influence of the tax planning of the company. by making the financial statements of PT Unilever Indonesia, Tbk. period 2006 until 2015 as objects of research.  Metode of research is kuantitatif methode,  tax planning in the count by using the calculation of the Effective tax rate on cash, long run cash effective tax rate, book a tax difference and tax sheltering activities. As for the value of the company using price earnings ratio.  Test results of Statistics 135.06 get the tax planning  influence to corporate vaue, so we accepted hipotesis Nul. Keywords: Tax Planning , Corporate Value   Abstrak. Bagi pemerintah, pajak merupakan sumber penerimaan tertinggi yang sangat diharapkan pada  saat ini dengan kontribusi lebih kurang 70% bila dibanding sumber penerimaan lain. Sebagai pendapatan utama negara, pajak menjadi beban tambahan bagi perusahaan karena dapat mengurangi nilai laba bersih perusahaan. Mengingat pajak merupakan beban yang harus ditanggung oleh perusahaan, maka perusahaan berupaya semaksimal mungkin untuk dapat meminimalisir beban pajak, dengan melakukan perencanaan pajak. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh perencanaan pajak terhadap nilai perusahaan. dengan menjadikan laporan keuangan PT. Unilever Indonesia,Tbk periode 2006 sampai dengan 2015 sebagai objek penelitian. Metode Penelitian yang digunakan adalah metode kuantitatif , dimana perencanaan pajak di hitung dengan menggunakan

  9. Characterization of boron doped nanocrystalline diamonds

    International Nuclear Information System (INIS)

    Peterlevitz, A C; Manne, G M; Sampaio, M A; Quispe, J C R; Pasquetto, M P; Iannini, R F; Ceragioli, H J; Baranauskas, V

    2008-01-01

    Nanostructured diamond doped with boron was prepared using a hot-filament assisted chemical vapour deposition system fed with an ethyl alcohol, hydrogen and argon mixture. The reduction of the diamond grains to the nanoscale was produced by secondary nucleation and defects induced by argon and boron atoms via surface reactions during chemical vapour deposition. Raman measurements show that the samples are nanodiamonds embedded in a matrix of graphite and disordered carbon grains, while morphological investigations using field electron scanning microscopy show that the size of the grains ranges from 20 to 100 nm. The lowest threshold fields achieved were in the 1.6 to 2.4 V/μm range

  10. Boron Nitride Nanotube: Synthesis and Applications

    Science.gov (United States)

    Tiano, Amanda L.; Park, Cheol; Lee, Joseph W.; Luong, Hoa H.; Gibbons, Luke J.; Chu, Sang-Hyon; Applin, Samantha I.; Gnoffo, Peter; Lowther, Sharon; Kim, Hyun Jung; hide

    2014-01-01

    Scientists have predicted that carbon's immediate neighbors on the periodic chart, boron and nitrogen, may also form perfect nanotubes, since the advent of carbon nanotubes (CNTs) in 1991. First proposed then synthesized by researchers at UC Berkeley in the mid 1990's, the boron nitride nanotube (BNNT) has proven very difficult to make until now. Herein we provide an update on a catalyst-free method for synthesizing highly crystalline, small diameter BNNTs with a high aspect ratio using a high power laser under a high pressure and high temperature environment first discovered jointly by NASA/NIA JSA. Progress in purification methods, dispersion studies, BNNT mat and composite formation, and modeling and diagnostics will also be presented. The white BNNTs offer extraordinary properties including neutron radiation shielding, piezoelectricity, thermal oxidative stability (> 800 C in air), mechanical strength, and toughness. The characteristics of the novel BNNTs and BNNT polymer composites and their potential applications are discussed.

  11. CVD mechanism of pyrolytic boron nitride

    International Nuclear Information System (INIS)

    Tanji, H.; Monden, K.; Ide, M.

    1987-01-01

    Pyrolytic boron nitride (P-BN) has become a essential material for III-V compound semiconductor manufacturing process. As the demand from electronics industry for larger single crystals increases, the demand for larger and more economical P-BN components is growing rapidly. P-BN is manufactured by low pressure CVD using boron-trihalides and ammonia as the reactants. In spite that P-BN has been in the market for quite a long time, limited number of fundamental studies regarding the kinetics and the formation mechanism of P-BN have been reported. As it has been demonstrated in CVD of Si, knowledge and both theoretical and empirical modeling of CVD process can be applied to improve the deposition technology and to give more uniform deposition with higher efficiency, and it should also apply to the deposition of P-BN

  12. Facile Synthesis of Ternary Boron Carbonitride Nanotubes

    Directory of Open Access Journals (Sweden)

    Luo Lijie

    2009-01-01

    Full Text Available Abstract In this study, a novel and facile approach for the synthesis of ternary boron carbonitride (B–C–N nanotubes was reported. Growth occurred by heating simple starting materials of boron powder, zinc oxide powder, and ethanol absolute at 1150 °C under a mixture gas flow of nitrogen and hydrogen. As substrate, commercial stainless steel foil with a typical thickness of 0.05 mm played an additional role of catalyst during the growth of nanotubes. The nanotubes were characterized by SEM, TEM, EDX, and EELS. The results indicate that the synthesized B–C–N nanotubes exhibit a bamboo-like morphology and B, C, and N elements are homogeneously distributed in the nanotubes. A catalyzed vapor–liquid–solid (VLS mechanism was proposed for the growth of the nanotubes.

  13. Microadditions of boron and vanadium in ADI

    Directory of Open Access Journals (Sweden)

    Rzychoń T.

    2007-01-01

    Full Text Available In the second part of the study, describing the role of vanadium and boron microadditions in the process of structure formation in heavy-walled castings made from ADI, the results of own investigations were presented. Within this study two series of melts of the ductile iron were made, introducing microadditions of the above mentioned elements to both unalloyed ductile iron and the ductile iron containing high levels of nickel and copper (the composition typical of ADI. Melts were conducted with iron-nickel-magnesium master alloy. Thermal analysis of the solidification process of the cast keel blocks was conducted, the heat treatment of the alloys was carried out, and then the effect of the introduced additions of boron and vanadium on the hardenability of the investigated cast iron was examined and evaluated.

  14. Boron nitride encapsulated graphene infrared emitters

    International Nuclear Information System (INIS)

    Barnard, H. R.; Zossimova, E.; Mahlmeister, N. H.; Lawton, L. M.; Luxmoore, I. J.; Nash, G. R.

    2016-01-01

    The spatial and spectral characteristics of mid-infrared thermal emission from devices containing a large area multilayer graphene layer, encapsulated using hexagonal boron nitride, have been investigated. The devices were run continuously in air for over 1000 h, with the emission spectrum covering the absorption bands of many important gases. An approximate solution to the heat equation was used to simulate the measured emission profile across the devices yielding an estimated value of the characteristic length, which defines the exponential rise/fall of the temperature profile across the device, of 40 μm. This is much larger than values obtained in smaller exfoliated graphene devices and reflects the device geometry, and the increase in lateral heat conduction within the devices due to the multilayer graphene and boron nitride layers.

  15. Boron nitride encapsulated graphene infrared emitters

    Energy Technology Data Exchange (ETDEWEB)

    Barnard, H. R.; Zossimova, E.; Mahlmeister, N. H.; Lawton, L. M.; Luxmoore, I. J.; Nash, G. R., E-mail: g.r.nash@exeter.ac.uk [College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF (United Kingdom)

    2016-03-28

    The spatial and spectral characteristics of mid-infrared thermal emission from devices containing a large area multilayer graphene layer, encapsulated using hexagonal boron nitride, have been investigated. The devices were run continuously in air for over 1000 h, with the emission spectrum covering the absorption bands of many important gases. An approximate solution to the heat equation was used to simulate the measured emission profile across the devices yielding an estimated value of the characteristic length, which defines the exponential rise/fall of the temperature profile across the device, of 40 μm. This is much larger than values obtained in smaller exfoliated graphene devices and reflects the device geometry, and the increase in lateral heat conduction within the devices due to the multilayer graphene and boron nitride layers.

  16. The spectrophotometric determination of boron in tourmalines

    Directory of Open Access Journals (Sweden)

    LJILJANA JAKSIC

    2005-02-01

    Full Text Available A procedure for the spectrophotometric determination of macro amounts of boron in tourmaline with azomethine H is described. The used tourmaline concentrate was obtained by magnetic separation and heavy-liquids purification of the schorl zone of pegmatite or granite aplite. The samples of tourmaline were decomposed by fusion with anhydrous sodium carbonate and taken up in dilute hydrochloric acid. The interfering effects of iron and aluminium were eliminated by masking with an EDTA – NTA solution. After pH adjustment, the boron was reacted with azomethine H and the absorbance of the obtained coloured complex was measured at 415 nm. The results are compared with those obtained by other procedures. The relative error of the determination was less than 3 %.

  17. Determination of microdistribution of boron in metals

    Energy Technology Data Exchange (ETDEWEB)

    Illic, R; Najzer, M; Rant, J [J. Stefan Institute, Ljubljana (Yugoslavia)

    1976-07-01

    A neutron induced autoradiographic technique was used for the determination of the boron microdistribution in metals. The specimens, which were in close contact with a LR 115 SSTD, were irradiated in the exposure room of the TRIGA Mark II reactor in Ljubljana. The spatial resolution of the autoradiographic image recorded by the LR 115 detector was found to be influenced mainly by the size of the reaction product tracks. The track diameter of a normally etched detector was about 7 {mu}m. An appreciable reduction of track size was achieved by pre-etching the detector foil before neutron irradiation. By this procedure it was possible to obtain a track diameter as small as 1 {mu}m and correspondingly to improve the spatial resolution of the autoradiographs of type EC 80 steel and Al Mg 3 alloy which contain 30 and 2 ppm of boron respectively. (author)

  18. Synthesis and characterization of boron nitrides nanotubes

    International Nuclear Information System (INIS)

    Ferreira, T.H.; Sousa, E.M.B.

    2010-01-01

    This paper presents a new synthesis for the production of boron nitride nanotubes (BNNT) from boron powder, ammonium nitrate and hematite tube furnace CVD method. The samples were subjected to some characterization techniques as infrared spectroscopy, thermal analysis, X-ray diffraction and scanning electron microscopy and transmission. By analyzing the results can explain the chemical reactions involved in the process and confirm the formation of BNNT with several layers and about 30 nanometers in diameter. Due to excellent mechanical properties and its chemical and thermal stability this material is promising for various applications. However, BNNT has received much less attention than carbon nanotubes, it is because of great difficulty to synthesize appreciable quantities from the techniques currently known, and this is one of the main reasons this work.(author)

  19. Grain refinement of cast titanium alloys via trace boron addition

    International Nuclear Information System (INIS)

    Tamirisakandala, S.; Bhat, R.B.; Tiley, J.S.; Miracle, D.B.

    2005-01-01

    The grain size of as-cast Ti-6Al-4V is reduced by about an order of magnitude from 1700 to 200 μm with an addition of 0.1 wt.% boron. A much weaker dependence of reduction in grain size is obtained for boron additions from >0.1% to 1.0%. Similar trends were observed in boron-modified as-cast Ti-6Al-2Sn-4Zr-2Mo-0.1Si

  20. On melting of boron phosphide under pressure

    OpenAIRE

    Solozhenko, Vladimir; Mukhanov, V. A.

    2015-01-01

    Melting of cubic boron phosphide, BP, has been studied at pressures to 9 GPa using synchrotron X-ray diffraction and electrical resistivity measurements. It has been found that above 2.6 GPa BP melts congruently, and the melting curve exhibits negative slope (–60 ± 7 K/GPa), which is indicative of a higher density of the melt as compared to the solid phase.

  1. High resolution imaging of boron carbide microstructures

    International Nuclear Information System (INIS)

    MacKinnon, I.D.R.; Aselage, T.; Van Deusen, S.B.

    1986-01-01

    Two samples of boron carbide have been examined using high resolution transmission electron microscopy (HRTEM). A hot-pressed B 13 C 2 sample shows a high density of variable width twins normal to (10*1). Subtle shifts or offsets of lattice fringes along the twin plane and normal to approx.(10*5) were also observed. A B 4 C powder showed little evidence of stacking disorder in crystalline regions

  2. Contributions to the chemistry of Boron, 112

    International Nuclear Information System (INIS)

    Goetze, R.; Noeth, H.

    1980-01-01

    Several methods were used to prepare a series of boron substituted 1, 3, 2-dithiaborols. The NMR data of this new class of compounds indicate in comparison to 1, 3, 2-dithiaborolanes, that the heterocycle can be looked at as a 6 π-electron system. A high degree of analogy in the mass spectrometric fragmentation of dithiaborolanes and dithiaborols exists, however, the parent ion of 2-methyl dithiaborol is more stable than that of the saturated analogon. (orig.)

  3. Pengaruh Good Corporate Governance Dan Ukuran Perusahaan Terhadap Tax Avoidance

    OpenAIRE

    Tandean, Vivi Adeyani

    2015-01-01

    Pemerintah mengharapkan wajib pajak membayar pajak sesuai kondisi sebenarnya sedangkan Perusahaanberusaha membayar pajak seminimal mungkin dengan melakukan manajemen pajak tanpa melanggar peraturan.Tuntutan bagi Perusahaan melakukan manajemen pajak yang harus diawasi menjadikan dibentuknya Corporategovernance. Penelitian ini bertujuan untuk menguji secara empiris pengaruh penerapan GCG dan ukuranperusahaan terhadap tax avoidance. Penelitian ini dilakukan pada Perusahaan manufaktur yang terdaf...

  4. Telaah Hubungan Kepuasan Kerja Dan Komitmen Organisasional Terhadap Turnover Intention

    OpenAIRE

    Ali Amran; Acep Rohendi

    2017-01-01

    ABSTRAK Karyawan merupakan elemen yang sangat penting bagi perusahaan. Karyawan sebagai sumber daya manusia adalah penggerak utama berjalannya roda perusahaan sehingga perusahaan harus menjaga kepuasan kerja dan komitmen organisasional agar karyawan tidak berkeinginan untuk berpindah ke perusahaan lain (turnover intention). Hal ini perlu dikaji pengaruh kepuasan kerja dan komitmen organisasional terhadap turnover intention sehingga dapat bermanfaat untuk mengetahui nilai penting dari kepu...

  5. Daya Hambat Ekstrak Aloe Vera terhadap pertumbuhan Staphylococcus Aureus

    OpenAIRE

    Rahmat, drg.Sp,Pros

    2011-01-01

    Dari hasil penelitian , maka dapat disimpulkan bahwa ekstrak Aloe Vera dapat menghambat pertumbuhan bakteri Stafhylococcus aureus, dan kadar hambat minimal ekstrak Aloe Vera adalah pada konsentrasi 25%. Tujuan Penelitan Ini adalah untuk mengetahui efektifitas ekstrak Aloe vera dalam menghambat pertumbuhan bakteri Stafhylococcus aureus dan daya hambat menimal, (DHM) terhadap pertumbuhan bakteri tersebut. Metode yang digunakan adalah pertumbuhan ekstrak Aloe vera, penegnceran ekstrak , pemur...

  6. Respon Tiga Varietas Sawi (Brassica Rapa L.) Terhadap Cekaman Air

    OpenAIRE

    Moctava, Mohammad Aries; Koesriharti, Koesriharti; Maghfoer, Mochammad Dawam

    2013-01-01

    Kebutuhan air tanaman berbeda-beda tergantung pada jenis tanamannya. Ketersediaan air bagi tanaman yang tidak mencukupi akan mempengaruhi morfologi dan fisiologis sehingga pertumbuhan dan hasil tanaman. Tujuan dari penelitian mendapatkan varietas sawi (Brassica rapa L.) yang tahan terhadap cekaman air. Penelitian dilaksanakan pada bulan Oktober sampai dengan Desember 2012. Tempat penelitian Kebun Percobaan Fakultas Pertanian Brawijaya, Desa Jatikerto, Kabupaten Malang.Penelitian menggunakan ...

  7. Molecular Dynamics Modeling of Piezoelectric Boron Nirtride Nanotubes

    Data.gov (United States)

    National Aeronautics and Space Administration — Conduct a systematic computational study on the physical and electro-mechanical properties of Boron Nitride Nanotubes (BNNTs) to evaluate their functional...

  8. Combustion Performance of a Staged Hybrid Rocket with Boron addition

    Science.gov (United States)

    Lee, D.; Lee, C.

    2018-04-01

    In this paper, the effect of boron on overall system specific impulse was investigated. Additionally, a series of combustion tests was carried out to analyze and evaluate the effect of boron addition on O/F variation and radial temperature profiles. To maintain the hybrid rocket engine advantages, upper limit of boron contents in solid fuel was set to be 10 wt%. The results also suggested that, when adding boron to solid fuel, it helped to provide more uniform radial temperature distribution and also to increase specific impulse by 3.2%.

  9. Deuterated-decaborane using boronization on JT-60U

    Energy Technology Data Exchange (ETDEWEB)

    Yagyu, Jun-ichi; Arai, Takashi; Kaminaga, Atsushi; Miyata, Katsuyuki [Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment; Arai, Masaru [Kaihatsu Denki Co., Ltd., Tokyo (Japan)

    2001-03-01

    In JT-60U, boronization using hydride-decaborane (B{sub 10}H{sub 14}) vaporization has been conducted for the first wall conditioning. Compared to other discharge cleaning (DC), boronization is claimed to be efficient in reduction of oxygen impurities and hydrogen recycling in plasma. However, there are some problems in reduction of hydrogen included in boron film and stabilization of DC glow discharge during the boronization. To solve these problems, a new boronization method using deuterated-decaborane (B{sub 10}D{sub 14}) was adopted instead of the conventional hydride-decaborane. As a result, hydrogen content in the boron film decreased clearly and discharge conditioning shots, for decreasing hydrogen content in plasmas, after the boronization were reduced to 1/10 in comparison to the conventional process. Furthermore, DC glow discharge became stable, with only helium carrier gas, and it was possible to save 30 hours in maximum of the time necessary to boronization. It is shown that the boronization using deuterated-decaborane is very efficient and effective method for the first wall conditioning. (author)

  10. Graphite and boron carbide composites made by hot-pressing

    International Nuclear Information System (INIS)

    Miyazaki, K.; Hagio, T.; Kobayashi, K.

    1981-01-01

    Composites consisting of graphite and boron carbide were made by hot-pressing mixed powders of coke carbon and boron carbide. The change of relative density, mechanical strength and electrical resistivity of the composites and the X-ray parameters of coke carbon were investigated with increase of boron carbide content and hot-pressing temperature. From these experiments, it was found that boron carbide powder has a remarkable effect on sintering and graphitization of coke carbon powder above the hot-pressing temperature of 2000 0 C. At 2200 0 C, electrical resistivity of the composite and d(002) spacing of coke carbon once showed minimum values at about 5 to 10 wt% boron carbide and then increased. The strength of the composite increased with increase of boron carbide content. It was considered that some boron from boron carbide began to diffuse substitutionally into the graphite structure above 2000 0 C and densification and graphitization were promoted with the diffusion of boron. Improvements could be made to the mechanical strength, density, oxidation resistance and manufacturing methods by comparing with the properties and processes of conventional graphites. (author)

  11. Dependence of boron cluster dissolution on the annealing ambient

    International Nuclear Information System (INIS)

    Radic, Ljubo; Lilak, Aaron D.; Law, Mark E.

    2002-01-01

    Boron is introduced into silicon via implantation to form p-type layers. This process creates damage in the crystal that upon annealing causes enhanced diffusion and clustering of the boron layer. Reactivation of the boron is not a well-understood process. In this letter we experimentally investigate the effect of the annealing ambient on boron reactivation kinetics. An oxidizing ambient which injects silicon interstitials is compared to an inert ambient. Contrary to published theory, an excess of interstitials does not accelerate the reactivation process

  12. Ion implantation of boron in germanium

    International Nuclear Information System (INIS)

    Jones, K.S.

    1985-05-01

    Ion implantation of 11 B + into room temperature Ge samples leads to a p-type layer prior to any post implant annealing steps. Variable temperature Hall measurements and deep level transient spectroscopy experiments indicate that room temperature implantation of 11 B + into Ge results in 100% of the boron ions being electrically active as shallow acceptor, over the entire dose range (5 x 10 11 /cm 2 to 1 x 10 14 /cm 2 ) and energy range (25 keV to 100 keV) investigated, without any post implant annealing. The concentration of damage related acceptor centers is only 10% of the boron related, shallow acceptor center concentration for low energy implants (25 keV), but becomes dominant at high energies (100 keV) and low doses ( 12 /cm 2 ). Three damage related hole traps are produced by ion implantation of 11 B + . Two of these hole traps have also been observed in γ-irradiated Ge and may be oxygen-vacancy related defects, while the third trap may be divacancy related. All three traps anneal out at low temperatures ( 0 C). Boron, from room temperature implantation of BF 2 + into Ge, is not substitutionally active prior to a post implant annealing step of 250 0 C for 30 minutes. After annealing additional shallow acceptors are observed in BF 2 + implanted samples which may be due to fluorine or flourine related complexes which are electrically active

  13. Considerations for boron neutron capture therapy studies

    International Nuclear Information System (INIS)

    Faria Gaspar, P. de.

    1994-01-01

    Radiotherapy is indispensable as a mean to eradicate deeply or infiltrating tumor tissue that can not be removed surgically. Therefore, it is not selective and may also kill the surrounding health tissue. The principle of BNCT (Boron Neutron Capture Therapy) consist in targeting a tumor selectively with a boron-10 compound. This nuclide has a large capture cross section for thermal neutrons and the nuclear reaction and the delivered energy in locus will selective the tumor. Since its initial proposal in 1963 BNCT has made much progress, however it is not used in a routine treatment. In this work it was approached some complex procedures, as the obtention of selective boron compounds, the adequate set up of neutron beams, the biodistribution, the in vivo and in vitro studies, and also human patients treatments. This work provide fundamentals about BNCT to professional of different areas of knowledge since it comprises multidisciplinary study. It includes appendixes for the ones not related to the field for a better comprehension of the many aspects involved. It is also presented a glossary containing technical and basic aspects involved. It is also presented a glossary containing technical and basic terms referred in the work. (author). 174 refs, 1 fig, 12 apps

  14. Advances in boronization on NSTX-Upgrade

    Directory of Open Access Journals (Sweden)

    C. H Skinner

    2017-08-01

    Full Text Available Boronization has been effective in reducing plasma impurities and enabling access to higher density, higher confinement plasmas in many magnetic fusion devices. The National Spherical Torus eXperiment, NSTX, has recently undergone a major upgrade to NSTX-U in order to develop the physics basis for a ST-based Fusion Nuclear Science Facility (FNSF with capability for double the toroidal field, plasma current, and NBI heating power and increased pulse duration from 1–1.5s to 5–8s. A new deuterated tri-methyl boron conditioning system was implemented together with a novel surface analysis diagnostic. We report on the spatial distribution of the boron deposition versus discharge pressure, gas injection and electrode location. The oxygen concentration of the plasma facing surface was measured by in-vacuo XPS and increased both with plasma exposure and with exposure to trace residual gases. This increase correlated with the rise of oxygen emission from the plasma.

  15. Boron determination in U3O8

    International Nuclear Information System (INIS)

    Ogura, Nadia S.; Sarkis, Jorge E.S.; Rosa, Daniele S.; Ulrich, Joao C.

    2009-01-01

    There exist specifications of the concentration as far the limit of impurities in the used uranium compounds is concerned. Among those impurities the boron element is detached. that in the uranium compounds acts as neutron absorber in nuclear reactions. Therefore, the determination of this element in uranium compounds, it is fundamental for the quality and performance of the nuclear fuels. However, the determination of this element is many times prejudiced by the presence of the uranium. For solving this problem, it is performed a chemical separation of the uranium (matrix) out of the interest. The most used methods to accomplish that separation are the solvent extraction and the ion exchange. In this work, the boron concentration will be done through the ion exchange technique, using polypropylene columns and Dowex AG 50W - X8 100-200 mesh cation resin in chloricide medium 0.25 M. The boron concentration will be determined through high resolution inductive coupling plasma mass spectrometry (HRICP-MS)

  16. Stable boron nitride diamondoids as nanoscale materials

    International Nuclear Information System (INIS)

    Fyta, Maria

    2014-01-01

    We predict the stability of diamondoids made up of boron and nitrogen instead of carbon atoms. The results are based on quantum-mechanical calculations within density functional theory (DFT) and show some very distinct features compared to the regular carbon-based diamondoids. These features are evaluated with respect to the energetics and electronic properties of the boron nitride diamondoids as compared to the respective properties of the carbon-based diamondoids. We find that BN-diamondoids are overall more stable than their respective C-diamondoid counterparts. The electronic band-gaps (E g ) of the former are overall lower than those for the latter nanostructures but do not show a very distinct trend with their size. Contrary to the lower C-diamondoids, the BN-diamondoids are semiconducting and show a depletion of charge on the nitrogen site. Their differences in the distribution of the molecular orbitals, compared to their carbon-based counterparts, offer additional bonding and functionalization possibilities. These tiny BN-based nanostructures could potentially be used as nanobuilding blocks complementing or substituting the C-diamondoids, based on the desired properties. An experimental realization of boron nitride diamondoids remains to show their feasibility. (paper)

  17. DAMPAK PEMBUANGAN LIMBAH TERHADAP PERUBAHAN KUALITAS OSEANOGRAFI BIOFISIK-KIMIA DAN PRODUKSI IKAN TERI (Stolephorus spp. DI PERAIRAN LAUT TELUK AMBON (The Impact of Waste Disposal on the Biophysical-chemical Characteristics Changes and Teri fish

    Directory of Open Access Journals (Sweden)

    Latif Sahubawa

    2001-04-01

    Full Text Available ABSTRAK Tujuan penelitian adalah untuk: (l mengidentifikasi karakteristik limbah hasil aktivitas manusia di pesisir teluk yang berpengaruh potensial terhadap penurunan sifat oseanografi biofisik-kimia perairan Laut Teluk Ambon; (2 mengevaluasi perubahan sifat oseanografi biofisik-kimia perairan dalam kaitannya dengan penyimpangan persyaratan peruntukkan sebagai tempat budi daya perikanan; dan (3 mengevaluasi pengaruh penyimpangan persyaratan peruntukan badan air laut terhadap potensi dan densitas ikan pelagis kecil, serta produksi ikan teri pada musim Timur dan Barat. Sampel penelitian terdiri atas air laut, ikan teri, dan kerang. Teknik pengambilan sampel ialah dengan pengacakan dan tanpa pengacakan. Teknik pengambilan data berupa survei, analisis laboratorium, wawancara, dan kuesioner. Metode analisis data Kurva Normal, Kuadrat Terkecil, Rancangan Acak Lengkap Pola Faktorial dan Berblok dengan Uji-F, Koefisien Nilai Nutrisi (KNN, Produksi Surplus, Hidroakustik, dan Sedimentasi Utermohl. Berdasarkan hasil analisis statistik, umumnya variabel penelitian tidak berpengaruh terhadap perubahan parameter oseanografi biofisik-kimia perairan Teluk Ambon, kecuali bahwa lokasi sampling berpengaruh terhadap nilai kecerahan pada tingkat signifikansi 95%. Kisaran nilai parameter oseanografi biofisik-kimia perairan laut ialah temperatur 23,7 - 28,7"C; TSS 2,005 - 12,436 mg/^; salinitas 24,00 - 35,50 mill; kecerahan 2,5 - 9,0 meter; pH 6,5 - 8,6; oksigen terlarut 2,09 - 6,88 mgA; BODs 10 - 50 mg/l; COD 22,5 - 150,8 mg/l; PO43- 0,22 - 3,29 mg/L, NQ-0.02 -2,94 mg/L; NO3- 21- 15,40 mg/L; Hg 0,001- 0,065 mg/L; KNN 0,27 -0/8 gr/cm; fitoplankton red-tede spesies Alexandrium affrne dengan jumlah 60,0 x 105 sel/liter menimbulkan perubahan warna perairan menj adi merah-kecoklatan. Produksi ikan teri pada musim Timur 191,5 ton (59,5 % dan musim Barat 130,2 ton (40,5 %. Populasi maksimum telur dan larva ikan teri adalah 4.090 telur/SO mt pada musim Timur dan 396 ekor/50

  18. A critical assessment of boron target compounds for boron neutron capture therapy.

    Science.gov (United States)

    Hawthorne, M Frederick; Lee, Mark W

    2003-01-01

    Boron neutron capture therapy (BNCT) has undergone dramatic developments since its inception by Locher in 1936 and the development of nuclear energy during World War II. The ensuing Cold War spawned the entirely new field of polyhedral borane chemistry, rapid advances in nuclear reactor technology and a corresponding increase in the number to reactors potentially available for BNCT. This effort has been largely oriented toward the eradication of glioblastoma multiforme (GBM) and melanoma with reduced interest in other types of malignancies. The design and synthesis of boron-10 target compounds needed for BNCT was not channeled to those types of compounds specifically required for GBM or melanoma. Consequently, a number of potentially useful boron agents are known which have not been biologically evaluated beyond a cursory examination and only three boron-10 enriched target species are approved for human use following their Investigational New Drug classification by the US Food and Drug Administration; BSH, BPA and GB-10. All ongoing clinical trials with GBM and melanoma are necessarily conducted with one of these three species and most often with BPA. The further development of BNCT is presently stalled by the absence of strong support for advanced compound evaluation and compound discovery driven by recent advances in biology and chemistry. A rigorous demonstration of BNCT efficacy surpassing that of currently available protocols has yet to be achieved. This article discusses the past history of compound development, contemporary problems such as compound classification and those problems which impede future advances. The latter include means for biological evaluation of new (and existing) boron target candidates at all stages of their development and the large-scale synthesis of boron target species for clinical trials and beyond. The future of BNCT is bright if latitude is given to the choice of clinical disease to be treated and if a recognized study

  19. Determination of isotopic composition of boron in boron carbide by TIMS and PIGE: an inter-comparison study

    International Nuclear Information System (INIS)

    Sasibhushan, K.; Rao, R.M.; Parab, A.R.; Alamelu, D.; Aggarwal, S.K.; Acharya, R.; Chhillar, S.; Pujari, P.K.

    2015-01-01

    The paper reports a comparison of results on the determination of isotopic composition of boron in boron carbide (B 4 C) samples by Thermal Ionisation Mass Spectrometry (TIMS) and Particle Induced Gamma ray Spectrometry (PIGE). B 4 C samples having varying boron isotopic composition (natural, enriched with respect to 10 B) and their synthetic mixtures) have been analysed by both the techniques. The 10 B atom% was found to be in the range of 20-67%. (author)

  20. Boron neutron capture therapy. Synthesis of boronated amines- and DNA intercalating agents for potential use in cancer therapy

    International Nuclear Information System (INIS)

    Ghaneolhosseini, H.

    1998-01-01

    Boron Neutron Capture Therapy is a binary cancer treatment modality, involving the delivery of a suitable boron compound to tumour cells followed by irradiation of the tumour by thermal neutrons. Boronated agents can selectively be delivered to tumour cells either directly with tumour-specific boron compounds, or by use of targeting strategies. However, the efficacy of this method would increase if the boron agents are localised in the cell nucleus rather than in the cell cytoplasm when neutron irradiation takes place. With these considerations in mind, some boronated DNA intercalating/interacting agents such as phenanthridine- acridine- spermidine- and naphthalimide derivatives were synthesised. Aminoalkyl-o-carboranes were synthesised in order to be used both for coupling to macromolecules and also for halogenation of their corresponding nido-derivatives. The amino groups were introduced using the Gabriel reagent N, N-dibenzyl iminodicarboxylate to provide 1-(aminomethyl)- and 1-(2-aminoethyl)-o-carboranes. The first attempt to achieve the possibility to accumulate a higher concentration of boron atoms in the cell nucleus was to synthesize carboranyl phenanthridinium analogues by reacting a p- or o-carboranyl moiety with phenanthridine, a chromophore with a planar aromatic ring system as DNA intercalator. Boronated acridine-spermidine, boronated diacridine, and boronated dispermidine were obtained in order to increase water solubility to avoid the interaction of these agents with non-DNA sides of the cell, especially membranes; and to enhance the feasibility of a higher DNA-binding constant and also decrease the DNA-drug dissociation rate. Finally, the synthesis of a boronated naphthalimide derivative was carried out by nucleophilic reaction of a primary aminoalkyl-p-carborane with naphthalic anhydride. Biological evaluations on DNA-binding, toxicity, and cellular binding with carboranyl phenanthridinium analogues, boronated acridine- and spermidine are described

  1. Pengaruh Globalisasi Terhadap Perkembangan Kesusastraan Bali

    Directory of Open Access Journals (Sweden)

    Cokorda Istri Sukrawati

    2015-12-01

    Full Text Available Tulisan ini bertujuan untuk mendeskripsikan pengaruh globalisasi terhadap budaya dan perkembangan sastra Bali dengan landasan teori globalisasi. Metode yang digunakan dalam penelitian ini adalah metode pustaka melalui langkah-­langkah, di antaranya observasi, menyimak, dan mencatat pada kartu data. Analisis data dilakukan dengan metode deskriptif kualitatif. Penelitian ini menghasilkan temuan bahwa budaya Bali sejak lama sudah bersentuhan dengan globalisasi. Potensi budaya dan kearifan lokal yang dimiliki masyarakat Bali dapat bersinergi dengan pengaruh globalisasi itu. Dalam bidang sastra khususnya, pengaruh globalisasi menunjukkan sesuatu yang positif. Semua itu dapat dibuktikan dengan semakin tingginya tingkat kreativitas dalam penciptaan karya sastra Bali, baik dalam bentuk tradisional maupun modern. Abstract: The paper aims to describe the effect of globalization toward the Balinese culture and literary development with the basic theory of globalization. The method used in this research is the literary method through some steps, including observes, observe, and noted on data cards. Data analysis uses qualitative of the descriptive method. Based on the result of the research it is found that Balinese culture has long been touched with globalization. The potency of culture and local genius of Balinese community can synergize with the effects of globalization. In the field of literature particularly, the effects of globalization mostly show something positive. All can be proved by the increasing creativity in creating literary works, both in traditional and modern forms. Key Words: globalization; influence; culture; Balinese literature; creativity

  2. PENGARUH PEMBELAJARAN KEWIRAUSAHAAN TERHADAP MOTIVASI BERWIRAUSAHA

    Directory of Open Access Journals (Sweden)

    Reza Fahmi

    2012-12-01

    Full Text Available This study aims to explain the influence of entrepreneurship learning towards motivation to conduct business among students of Faculty of Ushuluddin at the Imam Bonjol State Institute of Islamic Studies of Padang. Data for this study was gathered through a population of students from four departments within the faculty, namely: Psikologi Islam (PI, Tafsir Hadist (TH, Perbandingan Agama (PA, Aqidah Filsafat (AF. Off the population, 92 students were chosen for the sample. Observation, questionnaire, and documentation were employed as the technique of data gathering. The findings show that there was a significant influence between the entrepreneurship learning and motivation to conduct business among students of Faculty of Ushuluddin IAIN Imam Bonjol Padang. =========================================== Penelitian ini bertujuan untuk menjelaskan pengaruh pembelajaran kewirausahaan terhadap motivasi berwirausaha mahasiswa Fakultas Ushuluddin Institut Agama Islam Negeri (IAIN Imam Bonjol Padang. Data penelitian ini diperoleh dari responden yang berasal dari Fakultas Ushuluddin IAIN Imam Bonjol Padang, yang terdiri dari empat jurusan: Psikologi Islam (PI, Tafsir Hadist (TH, Perbandingan Agama (PA, Aqidah Filsafat (AF dengan jumlah sampel sebanyak 92 orang. Pengumpulan data dilakukan dengan observasi langsung, angket dan dokumentasi. Hasil penelitian menunjukkan bahwa terdapat pengaruh yang signifikan antara pembelajaran kewirausahaan dengan motivasi berwirausaha mahasiswa Fakultas Ushuluddin IAIN Imam Bonjol Padang.

  3. Determination of boron in graphite, boron carbide and glass by ICP-MS, ICP-OES and conventional wet chemical methods

    International Nuclear Information System (INIS)

    Venkatesh, K.; Kamble, Granthali S.; Venkatesh, Manisha; Kumar, Sanjukta A.; Reddy, A.V.R.

    2014-01-01

    Boron is an important element of interest in nuclear reactor materials due to its high neutron absorption cross section (σ 0 =3837 barns for 10 B). In the present paper, R and D work and routinely used methods have been described for the analysis of case samples (1) Graphite where boron is present at trace levels, (2) Boron Carbide having boron concentration of about 80% and (3) Glass containing 4-6 % boron. (author)

  4. PENGARUH PEMBERIAN FeCl3 TERHADAP PERTUMBUHAN Chaetoceros calcitrans

    Directory of Open Access Journals (Sweden)

    Cahya Laila Oktaviana Putri

    2009-04-01

    Full Text Available Besi termasuk unsur yang esensial bagi makhluk hidup. Pada tumbuhan termasuk algae, besi berperan sebagai penyusun sitokrom dan klorofil. Selain itu, besi juga berperan dalam sistem enzim dan transfer elektron pada proses fotosintesis. Namun, belum diketahui konsentrasi yang tepat untuk pengunaannya oleh algae sehingga diperlukan penelitian yang dapat mengetahui konsentrasi pemakaian FeCl3 untuk perkembangan algae terutama untuk C. calcitrans. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pemberian FeCl3 terhadap kepadatan C. calcitran sehingga dapat mengetahui konsentrasi FeCl3 yang paling baik terhadap kepadatan C. calcitran. Serta untuk Mengetahui kepadatan C. calcitran berdasarkan hari. Penelitian ini diawali dengan menyetock C. calcitran hingga kepadatan 400 ribu sel/ml kemudian dilanjutkan dengan mengkultur C. calcitran pada toples yang telah dibuat sama parameternya kecuali pemberian FeCl3 sesuai dengan perlakuan. Untuk menganalisa pengaruh pemberian FeCl3 pada konsentrasi yang bebeda terhadap kepadatan C. calcitrans digunakan analisa sidik ragam (ANOVA dua langkah dengan bantuan software SPSS 12 dan dilakukan uji lanjut Tukey (Multiple Comparisons untuk melihat perlakuan yang berbeda dengan membandingkan berbagai hasil perlakuan. Pada konsentrasi FeCl3 0 mg/l berbeda nyata (P<0,05 sedangkan konsentrai FeCl3 0,02 mg/l, 0,2  mg/l, 2 mg/l berbeda signifikan terhadap kepadatan C. calcitrans sehingga hanya konsentrasi FeCl3 0 mg/l yang mempengaruhi kepadatan C. calcitrans. Ini disebabkan karena pemberian konsentrasi terlalu sedikit dan selisih konsentrasi yang kecil sehingga tidak mempengaruhi kepadatan C. calcitrans. Sedangkan untuk hari  diperoleh hari ke-1 dan ke-7 merupakan hari yang signifikan terhadap kepadatan C. calcitrans.  Kata Kunci : Chaetoceros calcitrans, FeCl3 dan kepadatan

  5. PENGARUH KARAKTERISTIK, KESELAMATAN DAN KESEHATAN KERJA TERHADAP PRODUKTIVITAS TENAGA KERJA

    Directory of Open Access Journals (Sweden)

    Desy Yanti Tri W.A.T

    2017-06-01

    Full Text Available Sebagian besar penduduk Kota Semarang bekerja di sektor industri, dengan begitu diharapkan dapat meningkatkan produkivitas tenaga kerja. Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh usia, tingkat pendidikan, masa kerja, dan keselamatan dan kesehatan kerja terhadap produktivitas tenaga kerja di kota Semarang. Populasi dalam penelitian ini sebanyak 3.449 orang dan sampel penelitian berjumlah 97 responden yang bekerja pada industri baja di Kota Semarang. Penelitian ini menggunakan analisis deskriptif dan regresi linier berganda. Teknik pengambilan sampel dalam penelitian ini adalah teknik probability sampling yang meliputi simple random sampling. Pengumpulan data dalam penelitian ini dengan beberapa cara, yaitu penelusuran literatur, kuesioner dan wawancara. Hasil penelitian ini adalah 1 usia berpengaruh positif dan signifikan terhadap produktivitas tenaga kerja, 2 tingkat pendidikan berpengaruh positif namun tidak signifikan terhadap produktivitas tenaga kerja, 3 masa kerja berpengaruh negatif namun signifikan terhadap produktivitas tenaga kerja, dan 4 keselamatan dan kesehatan kerja berpengaruh positif dan signifikan terhadap produktivitas tenaga kerja pada industri baja di Kota Semarang. Most residents of Semarang working in the industrial sector, thus expected to increase Productivity of labor. This study aims to determine how big the influence of age, education level, length of employment, and occupational safety and health on labor productivity in Semarang. The population in this study as many as 3,449 people and the sample amounted to 97 respondents who work in the steel industry in the city of Semarang. This research uses descriptive analysis and multiple linear regression. The sampling technique in this research is the probability sampling techniques which include simple random sampling. Collecting data in this study in several ways, namely literature search, questionnaire and interview. Results of this study were 1

  6. KUALITAS JASA YANG MEMPENGARUHI LOYALITAS DAN RELEVANSINYA TERHADAP KEPUASAN

    Directory of Open Access Journals (Sweden)

    Siti Fatona

    2010-03-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui pengaruh kualitas jasa terhadap loyalitas konsumen melalui kepuasan sebagai variabel mediatornya pada Bank BPR-BKK Karangmalang sragen. Pelanggan merupakan fokus utama yang merasakan kepuasan dari kualitas jasa yang dirasakan. Kepuasan konsumen merupakan faktor dominan dan menentukan dalam mempertahankan perusahaan. Hasil pengujian  menggunakan regresi linear berganda untuk penentuan uji t dan uji F serta pengujian koefisien determinasi. Hasil penelitian model 1 menunjukan bahwa keandalan, daya tanggap, jaminan, empati dan bukti fisik berpengaruh positif terhadap loyalitas konsumen dan untuk model 2 tidak signifikan.  Terdapat pengaruh secara simultan dari keandalan, daya tanggap, jaminan, empati dan bukti fisik terhadap loyalitas konsumen. Sedangkan hasil uji t membuktikan bahwa hanya jaminan dan bukti fisik secara parsial berpengaruh terhadap loyalitas konsumen. Hal ini berarti bahwa keandalan, daya tanggap, jaminan, empati dan bukti fisik  berpengaruh terhadap loyalitas konsumen. This reseach aimed to determine the effect of service quality on customer loyalty through customer satisfaction as a mediating variable in the RB-BKK Bank Karangmalang sragen. Customers are the main focus of satisfaction perceived service quality. Consumer satisfaction is a dominant factor in the determination of the company to maintain. Test results using multiple linear regression to determine the t test and F test. The results show that the model 1 reliability, responsiveness, assurance, empathy and tangibles positive effect on customer loyalty and for model 2 is not significant. There is simultaneous influence of reliability, responsiveness, assurance, empathy and tangibles customer loyalty. While the t-test results prove that the only physical evidence of insurance and partial effect on customer loyalty. This means that the reliability, responsiveness, assurance, empathy and tangibles effect on customer

  7. Synovectomy by neutron capture in boron

    International Nuclear Information System (INIS)

    Vega C, H.R.

    2002-01-01

    The rheumatoid arthritis is an illness which affect approximately at 3% of the World population. This illness is characterized by the inflammation of the joints which reduces the quality of life and the productivity of the patients. Since, it is an autoimmune illness, the inflammation is due to the overproduction of synovial liquid by the increase in the quantity of synoviocytes. The rheumatoid arthritis does not have a definitive recovery and the patients have three options of treatment: the use of drugs, the surgery and the radio synovectomy. The synovectomy by neutron capture in Boron is a novel proposal of treatment of the rheumatoid arthritis that consists in using a charged compound with Boron 10 that is preferently incorporated in the synoviocytes and to a less extent in the rest of surrounding tissues of the joint. Then, the joint is exposed to a thermal neutron field that induces the reaction (n, α) in the 10 B. the products of this reaction place their energy inside synoviocytes producing their reduction and therefore the reduction of the joint inflammation. Since it is a novel procedure, the synovectomy by neutron capture in boron has two problems: the source design and the design of the adequate drug. In this work it has been realized a Monte Carlo study with the purpose to design a moderating medium that with a 239 Pu Be source in its center, produces a thermal neutron field. With the produced neutron spectra, the neutrons spectra and neutron doses were calculated in different sites inside a model of knee joint. In Monte Carlo studies it is necessary to know the elemental composition of all the joint components, for the case of synovia and the synovial liquid this information does not exist in such way that it is supposed that its composition is equal than the water. In this work also it has been calculated the kerma factors by neutrons of synovia and the synovial liquid supposing that their elemental composition are similar to the blood tissue

  8. An empirical model for parameters affecting energy consumption in boron removal from boron-containing wastewaters by electrocoagulation.

    Science.gov (United States)

    Yilmaz, A Erdem; Boncukcuoğlu, Recep; Kocakerim, M Muhtar

    2007-06-01

    In this study, it was investigated parameters affecting energy consumption in boron removal from boron containing wastewaters prepared synthetically, via electrocoagulation method. The solution pH, initial boron concentration, dose of supporting electrolyte, current density and temperature of solution were selected as experimental parameters affecting energy consumption. The obtained experimental results showed that boron removal efficiency reached up to 99% under optimum conditions, in which solution pH was 8.0, current density 6.0 mA/cm(2), initial boron concentration 100mg/L and solution temperature 293 K. The current density was an important parameter affecting energy consumption too. High current density applied to electrocoagulation cell increased energy consumption. Increasing solution temperature caused to decrease energy consumption that high temperature decreased potential applied under constant current density. That increasing initial boron concentration and dose of supporting electrolyte caused to increase specific conductivity of solution decreased energy consumption. As a result, it was seen that energy consumption for boron removal via electrocoagulation method could be minimized at optimum conditions. An empirical model was predicted by statistically. Experimentally obtained values were fitted with values predicted from empirical model being as following; [formula in text]. Unfortunately, the conditions obtained for optimum boron removal were not the conditions obtained for minimum energy consumption. It was determined that support electrolyte must be used for increase boron removal and decrease electrical energy consumption.

  9. Boron Removal in Radioactive Liquid Waste by Forward Osmosis Membrane

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, Dooseong; Choi, Hei Min; Lee, Kune Woo; Moon Jeikwon [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2014-05-15

    These wastes contain about 0.3-0.8 wt% boric acid and have been concentrated through an evaporation treatment. Boric acid tends to crystallize owing to its solubility, and to plug the evaporator. The volume reduction obtained through evaporation is limited by the amount of boric acid in the waste. As an emerging technology, forward osmosis (FO) has attracted growing interest in wastewater treatment and desalination. FO is a membrane process in which water flows across a semi-permeable membrane from a feed solution of lower osmotic pressure to a draw solution of higher osmotic pressure. However, very few studies on the removal of boron by FO have been performed. The objective of this study is to evaluate the possibility of boron separation in radioactive liquid waste by FO. In this study, the performance of FO was investigated to separate boron in the simulated liquid waste under the factors such as pH, osmotic pressure, ionic strength of the solution, and membrane characteristic. The boron separation in radioactive borate liquid waste was investigated with an FO membrane. When the feed solution containing boron is treated by the FO membrane, the boron permeation depends on the type of membrane, membrane orientation, pH of the feed solution, salt and boron concentration in the feed solution, and osmotic pressure of the draw solution. The boron flux begins to decline from pH 7, and increases with an increase in the osmotic driving force. The boron flux of the CTA-ES and ALFD membrane orientation is higher than those of the CTA-NW and ALFF orientation, respectively. The boron permeation rate is constant regardless of the osmotic pressure and membrane orientation. The boron flux decreases slightly with the salt concentration, but it is not heavily influenced at a low salt concentration.

  10. Boron Removal in Radioactive Liquid Waste by Forward Osmosis Membrane

    International Nuclear Information System (INIS)

    Hwang, Dooseong; Choi, Hei Min; Lee, Kune Woo; Moon Jeikwon

    2014-01-01

    These wastes contain about 0.3-0.8 wt% boric acid and have been concentrated through an evaporation treatment. Boric acid tends to crystallize owing to its solubility, and to plug the evaporator. The volume reduction obtained through evaporation is limited by the amount of boric acid in the waste. As an emerging technology, forward osmosis (FO) has attracted growing interest in wastewater treatment and desalination. FO is a membrane process in which water flows across a semi-permeable membrane from a feed solution of lower osmotic pressure to a draw solution of higher osmotic pressure. However, very few studies on the removal of boron by FO have been performed. The objective of this study is to evaluate the possibility of boron separation in radioactive liquid waste by FO. In this study, the performance of FO was investigated to separate boron in the simulated liquid waste under the factors such as pH, osmotic pressure, ionic strength of the solution, and membrane characteristic. The boron separation in radioactive borate liquid waste was investigated with an FO membrane. When the feed solution containing boron is treated by the FO membrane, the boron permeation depends on the type of membrane, membrane orientation, pH of the feed solution, salt and boron concentration in the feed solution, and osmotic pressure of the draw solution. The boron flux begins to decline from pH 7, and increases with an increase in the osmotic driving force. The boron flux of the CTA-ES and ALFD membrane orientation is higher than those of the CTA-NW and ALFF orientation, respectively. The boron permeation rate is constant regardless of the osmotic pressure and membrane orientation. The boron flux decreases slightly with the salt concentration, but it is not heavily influenced at a low salt concentration

  11. PRAKTIK PENGALAMAN LAPANGANDAN DAMPAKNYA TERHADAP KOMPETENSI MAHASISWA PROGRAM STUDI TEKNIK INFORMATIKA DAN KOMPUTER

    Directory of Open Access Journals (Sweden)

    Ratih Widya Nurcahyo

    2015-06-01

    Full Text Available Penelitian ini di bertujuan untuk mengetahui: (1 kompetensi mahasiswa STKIP PGRI Pontianak dalam kegiatan PPL di SMK, SMA, SMP se Kota Pontianak; (2 pengaruh praktik persekolahan terhadap kompetensi mahasiswa STKIP PGRI Pontianak sebagai calon guru; (3 pengaruh rencana pembelajaran terhadap kompetensi mahasiswa STKIP PGRI Pontianak sebagai calon guru; (4 pengaruh pelaksanaan pembelajaran terhadap kompetensi mahasiswa STKIP PGRI Pontianak sebagai calon guru; (5 pengaruh secara bersama-sama antara praktik persekolahan, rencana pembelajaran, dan pelaksanaan pembelajaran terhadap kompetensi mahasiswa. Hasil penelitian ini menunjukan bahwa (1 kompetensi pedagogik, kepribadian, sosial, termasuk kategori cukup dan kompetensi profesional termasuk kategori baik;(2 terdapat pengaruh positif dan signifikan antara praktek persekolahan terhadap kompetensi mahasiswa sebagai calon guru dengan nilai R2 = 0,515; p= 0,000; (3 terdapat pengaruh positif dan signifikan antara rencana pembelajaran terhadap kompetensi mahasiswa sebagai calon guru dengan nilai R2=0,272; p=0,000; (4 terdapat pengaruh positif dan signifikan antara pelaksanaan pembelajaran terhadap kompetensi mahasiswa sebagai calon guru dengan nilai R2= 0,515; p= 0,000; dan (5terdapat pengaruh positif dan signifikan antara praktik persekolahan, rencana pembelajaran, dan pelaksanaan pembelajaran secara bersama-sama terhadap kompetensi mahasiswa sebagai calon guru dengan nilai R2= 0,931. Prediksi perubahan Y ditunjukan oleh persamaan garis regresi Y = 9,463 + 0,759X1 + 0,819X2+0,763X3

  12. Pengaruh Brand Image Dan Brand Trust Terhadap Keputusan Pembelian Sepatu Converse

    OpenAIRE

    Adiwidjaja, Adrian Junio

    2017-01-01

    Brand image dan brand trust merupakan faktor yang dapat mempengaruhi keputusan pembelian konsumen. Brand image yang baik akan memberikan dampak positif bagi Perusahaan yang akhirnya akan memberikan keuntungan bagi Perusahaan melalui peningkatan pembelian konsumen karena adanya brand trust dari konsumen terhadap produk. Penelitian ini bertujuan untuk mengetahui ada atau tidaknya pengaruh brand image dan brand trust terhadap keputusan pembelian sepatu Converse.Jenis penelit...

  13. Analisis Pengaruh Eco-Label terhadap Kesadaran Konsumen untuk Membeli Green Product

    OpenAIRE

    Muslim, Erlinda; Indriani, Dyah Rusty

    2014-01-01

    . Pandangan manusia telah bergeser seiring dengan meningkatnya kepedulian terhadap lingkungan, sehingga menimbulkan tuntutan bagi pelaku bisnis untuk memberikan solusi dalam menghadapi berbagai permasalahan lingkungan melalui pengembangan green product. Eco-label sebagai jaminan mutu green product merupakan isu di dunia bisnis dan perdagangan global saat ini. Tujuan penelitian ini adalah menerapkan Structural Equation Modeling (SEM) untuk mengetahui pengaruh eco-label terhadap kesadaran kons...

  14. Analisa Pengaruh Employee Engagement Terhadap Kinerja Karyawan Dan Turnover Intention Di Hotel D'season Surabaya

    OpenAIRE

    Natalia, Jessica; Rosiana, Elvin

    2017-01-01

    Employee engagement di Perusahaan sangat penting karena memberikan banyak manfaat sehingga setiap karyawan harus memiliki rasa engaged. Tujuan dalam penelitian ini adalah untuk mengetahui pengaruh signifikan employee engagement terhadap kinerja karyawan dan turnover intention serta pengaruh signifikan dari turnover intention terhadap kinerja karyawan. Jenis penelitian ini menggunakan pendekatan kuantitatif. Teknik analisis data yang digunakan dalam penelitian ini menggunakan software Smart PL...

  15. PENGARUH KOMUNIKASI PEMASARAN TERPADU TERHADAP CITRA MEREK PRODUK KARTU SIMPATI PADA PT. TELKOMSEL MAKASSAR

    OpenAIRE

    -, HAJI AZWAR

    2015-01-01

    2015 PENGARUH KOMUNIKASI PEMASARAN TERPADU TERHADAP CITRA MEREK PRODUK KARTU SIMPATI PADA PT.TELKOMSEL MAKASSAR Haji Azwar Nurdjanah Hamid Musran Munizu Tujuan dari penelitian ini adalah untuk melihat sejauh mana pengaruh program komunikasi pemasaran terpadu terhadap citra merek produk Simpati pada PT. Telkomsel Makassar. Sedangkan metode analisis yang digunakan dalam penelitian ini adalah analisis descriptif, analisis regresi linear berganda, uji validitas dan...

  16. Pengaruh Marketing Mix Dan Brand Image Terhadap Customer Satisfaction Dan Customer Loyalty Di Restoran X Surabaya

    OpenAIRE

    Wijaya, Kevin; Sutejo, Andrew Robby Darmawan

    2017-01-01

    Tujuan dilakukannya penelitian ini adalah untuk mengetahui pengaruh Marketing Mix dan Brand Image yang dijalankan oleh restoran X Surabaya terhadap kepuasan konsumen dan loyalitas konsumen. Penelitian ini menggunakan penelitian quantitatif, sampel yang diperoleh dari pengisian kuesioner oleh 100 konsumen yang pernah makan di restoran X. Dengan menggunakan metode analisa Partial Least Square, hasil penelitian menunjukkan bahwa marketing mix mempunyai pengaruh positif significant terhadap kepua...

  17. Persepsi Mahasiswa Program Pascasarjana Terhadap Database Science Direct Pada Perpustakaan Universitas Sumatera Utara

    OpenAIRE

    Purba, Artita Wati Dorma

    2017-01-01

    120709051 Purba, Artita Wati Dorma. 2017. Persepsi Mahasiswa Program Pascasarjana terhadap Database Science Direct pada Perpustakaan Universitas Sumatera Utara. MEDAN: Program Studi Ilmu Perpustanaan, Fakultas Ilmu Budaya, Universitas Sumatera Utara Penelitian ini bertujuan untuk mengetahui bagaimanakah persepsi mahasiswa program Pascasarjana terhadap Database Science Direct pada Perpustakaan Universitas Sumatera Utara. Penelitian ini menggunakan metode deskriptif dengan pendekatan kuan...

  18. Analisa Pengaruh Customer Value Terhadap Purchase Intention Melalui Online Promotion Di Starbucks Coffee Surabaya

    OpenAIRE

    Wiranegara, Charles Oktavia

    2015-01-01

    Purpose: Penelitian ini bertujuan untuk mengetahui pengaruh customer value terhadap online promotion dan pengaruh online promotion terhadap purchase intention di Starbucks Coffee.Design/methodologi approach: Desain penelitian menggunakan pdendekatan kausal karena menjual hubungan sebab akibat. Variabel penelitian meliputi: satu variabel independen yaitu customer value (X) dan dua variabel terikat yaitu: online promotion (Y1) dan purchase intention (Y2). Customer value dijual d...

  19. Analisa Pengaruh Relationship Marketing Dan Switching Cost Terhadap Customer Loyalty Di Hotel “X” Surabaya

    OpenAIRE

    Yosswanta, Tigrent; Susanto, Michael Triadi; Ervanto, Edwin

    2015-01-01

    Tujuan penelitian ini adalah untuk mengetahui sejauh mana pengaruh Relationship Marketing dan Switching Cost terhadap Customer Loyalty di Hotel “X” Surabaya. Jenis penelitian yang digunakan adalah kuantitatif kausal yang bertujuan menguji hubungan sebab akibat. Sedangkan teknik pengumpulan data yang digunakan adalah kuesioner. Berdasarkan hasil penelitian yang diperoleh menunjukkan Relationship Marketing berpengaruh positif dan signifikan terhadap Customer Loyalty. Sedangkan, Switching Cost b...

  20. PENGARUH SOCIAL MEDIA MARKETING TERHADAP TINGKAT KUNJUNGAN COFFEE TOFFEE DI MAKASSAR

    OpenAIRE

    PASSAWUNG, ALIQUE LA

    2014-01-01

    2014 Pengaruh Social Media Marketing Terhadap Tingkat Kunjungan Coffee Toffee Di Makassar The Effect of Social Media Marketing on Rate of The Visit Coffee Toffee at Makassar Alique La Passawung Abd.Rahman Kadir Mukhtar Penelitian ini membahas pengaruh social media marketing terhadap tingkat kunjungan Coffee Toffee di Makassar. Data yang digunakan dalam penelitian ini adalah data primer yang diperoleh dari kuesioner. ...

  1. Analisis Perbandingan Sikap Konsumen terhadap Penggunaan Produk Shampoo Clear dan Shampoo Pantene di Winangun

    OpenAIRE

    Soegoto, Agus Supandi; Mananeke, Lisbeth; Manossoh, Angelina

    2015-01-01

    Sikap seseorang merupakan konsep penting dalam mempelajari perilaku konsumen. Dengan mempengaruhi perilaku konsumen, maka para pemasar dapat mempengaruhi perilaku pembelian konsumen. Sikap yang merupakan ekspresi perasaan menyatakan rasa suka atau tidak suka, senang atau tidak senang terhadap suatu produk, dimana produk tersebut dapat berupa barang atau jasa. Sikap konsumen akan mempengaruhi pilihannya dalam membeli, dimana seseorang mempunyai sikap terhadap segala sesuatu, misalnya: pekerjaa...

  2. PENGARUH CUSTOMER RELATIONSHIP MANAGEMENT DAN KUALITAS PELAYANAN TERHADAP LOYALITAS NASABAH PADA PT BANK SULSELBAR CABANG PANGKEP

    OpenAIRE

    MASWAR, ALFIANI

    2016-01-01

    2016 Pengaruh Customer Relationship Management dan Kualitas Pelayanan Terhadap Loyalitas Nasabah Pada PT Bank Sulselbar Cabang Pangkep Alfiani Maswar Indrianty Sudirman Abdul Razak Munir Penelitian ini bertujuan untuk mengetahui pengaruh Customer Relationship Management dan Kualitas Pelayanan terhadap Loyalitas Nasabah pada PT. Bank Sulselbar Cabang Pangkep dan untuk menentukan manakah dari variabel variabel dari Customer Relationship Management dan Kualitas Pel...

  3. PENGARUH DIGITAL MARKETING DAN CUSTOMER RELATIONSHIP MARKETING TERHADAP LOYALITAS KONSUMEN MASKAPAI PENERBANGAN GARUDA INDONESIA

    OpenAIRE

    BUDIMAN, NOVAYANTI

    2017-01-01

    2017 ABSTRAK PENGARUH DIGITAL MARKETING DAN CUSTOMER RELATIONSHIP MARKETING TERHADAP LOYALITAS KONSUMEN MASKAPAI PENERBANGAN GARUDA INDONESIA THE INFLUENCES OF DIGITAL MARKETING AND CUSTOMER RELATIONSHIP MARKETING TOWARD GARUDA INDONESIA AIRLINES??? CUSTOMER LOYALTY Novayanti Budiman Yansor Djaya Wahda Penelitian ini bertujuan untuk menganalisis pengaruh dari pemasaran digital dan pemasaran hubungan konsumen terhadap loyalitas ...

  4. PENYELESAIAN KASUS KEKERASAN TERHADAP TENAGA KERJA WANITA INDONESIA DI MALAYSIA MELALUI IMPLEMENTASI KONVENSI CEDAW PBB 1979

    OpenAIRE

    Umi Qodarsari

    2016-01-01

    Diskriminasi terhadap perempuan umumnya disebabkan budaya patriarki. Kekhawatiran tentang kondisi perempuan muncul dan diwujudkan melalui gerakan perempuan yang kemudian melahirkan konvensi internasional perlindungan hukum bagi perempuan.Salah satu konvensi tersebut adalah Konvensi tentang Penghapusan Segala Bentuk Diskriminasi terhadap Perempuan (CEDAW). CEDAW mewajibkan negara-negara yang meratifikasi untuk mengutuk segalabentuk diskriminasi dan menerapkan kebijakan yangmenghapus diskrimina...

  5. PENGARUH LEVEL DAN WAKTU MARINASI THEOBROMINE TERHADAP KUALITAS ORGANOLEPTIK DAGING SAPI BALI

    OpenAIRE

    ESARIANTO, ALIFRAN

    2016-01-01

    2015 ABSTRAK ALIFRAN ESARIANTO (I111 11 363). Pengaruh Level dan Waktu Marinasi Theobromine Terhadap Kualitas Organoleptik Daging Sapi Bali. Dibimbing oleh HIKMAH M. ALI dan ENDAH MURPININGRUM. Pemberian theobromine dapat meningkatkan kualitas organoleptik daging sapi Bali melalui perlakuan marinasi. Tujuan penelitian ini adalah untuk mengetahui pengaruh level dan lama marinasi theobromine serta interaksi keduanya terhadap kualitas organoleptik daging sapi Bali. Parameter yang diamat...

  6. Pengaruh Ekstrak Alang-alang, Babadotan dan Teki terhadap Penyakit Antraknosa pada Buah Pisang Kultivar Cavendish

    OpenAIRE

    Intan Zahara Arie; Joko Prasetyo; Efri Efri

    2015-01-01

    Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak alang-alang (Imperata cylindrica), teki (Cyperus rotundus), dan babadotan (Ageratum conyzoides) terhadap pertumbuhan dan sporulasi Colletotrichum musae. Penelitian juga bertujuan mengetahui pengaruh ekstrak alang-alang, teki dan babadotan terhadap keparahan penyakit antraknosa secara in vivo.Penelitian dilaksanakan di Laboratorium Penyakit Tumbuhan, Fakultas Pertanian, Universitas Lampung, dari bulan Juni sampai dengan September 2014....

  7. ANALISIS PENGARUH CUSTOMER RELATIONSHIP MANAGEMENT TERHADAP KEPUASAN PELANGGAN PADA PT TELKOMSEL DI MAKASSAR

    OpenAIRE

    ANANDA, RACHMA RESKY

    2015-01-01

    2015 Analisis Pengaruh Customer Relationship Management Terhadap Kepuasan Pelanggan Pada PT Telkomsel di Makassar Analysis of Customer Relationship Management Influence to Customer Satisfaction at PT Telkomsel in Makassar Rachma Resky Ananda Muh. Asdar Yansor Djaya Tujuan dari penelitian ini adalah untuk menganalisis pengaruh Customer Relationship (continuity marketing, one to one marketing dan partnering atau co-marketing) terhadap k...

  8. PENGARUH PROFESIONALISME DAN INDEPENDENSI AUDITOR INTERNAL TERHADAP KUALITAS AUDIT: STUDI PADA INSPEKTORAT PROPINSI JAWA BARAT

    Directory of Open Access Journals (Sweden)

    Susilawati Susilawati

    2015-08-01

    Tujuan Penelitian ini adalah: pertama, untuk mengetahui serta menganalisis pengaruh Profesionalisme dan Independensi Auditor Internal secara simultan terhadap kualitas audit pada Inspektorat Provinsi Jawa Barat. Kedua, untuk mengetahui serta menganalisis pengaruh Profesionalisme dan Independensi Auditor Internal secara parsial terhadap kualitas audit pada Inspektorat Provinsi Jawa Barat DOI: 10.15408/etk.v13i2.1886

  9. Resistensi dan Sensitivitas Bakteri terhadap Antibiotik di RSU dr. Soedarso Pontianak Tahun 2011-2013

    OpenAIRE

    Nurmala Nurmala; IGN Virgiandhy; Andriani Andriani; Delima F. Liana

    2015-01-01

    Salah satu upaya untuk mengurangi resistensi, pemberian antibiotik harus berdasarkan pola bakteri penyebab infeksi dan kepekaan bakteri terhadap antibiotik. Tujuan penelitian ini untukmengetahui pola bakteri, resistensi dan sensitivitasnya terhadap antibiotik di RSU dr. SoedarsoPontianak tahun 2011-2013. Penelitian deskriptif dengan pendekatan retrospektif dilakukan RSU dr. Soedarso, Pontianak. Sampel penelitian adalah hasil pemeriksaan kultur dan uji kepekaan spesimen pus pasien yang diperi...

  10. PENGARUH EVENT MARKETING TERHADAP BRAND IMAGE ROKOK DJARUM SUPER MILD PT DJARUM

    Directory of Open Access Journals (Sweden)

    Ellen Madhalena

    2016-10-01

      Rokok merupakan salah satu industri di Indonesia yang memiliki peningkatan setiap tahunnya. Dari data yang diperoleh untuk perusahaan rokok di Indonesia pada tahun 2014 bulan Mei, PT Djarum menempati posisi ke 3 pangsa pasar rokok di Indonesia berdasarkan survei dari CNN Indonesia 2014, dengan produk unggulan yaitu rokok low tar nicotine. Untuk mencapai tujuan perusahaan, maka setiap perusahaan menggunakan strategi dalam berpromosi. Salah satu bentuk promosi yang digunakan adalah event marketing. Event marketing yang dilaksanakan perusahaan juga harus tepat pada sasaran agar mengangkat citra merek suatu perusaan bagi konsumen. Penelitian ini bertujuan untuk mengetahui pengaruh event marketing terhadap brand image rokok Djarum Super Mild. Penelitian ini merupakan penelitian kuantitatif dengan analisis data deskriptif dan kausal dengan metode regresi linear berganda. Responden yang diteliti dalam penelitian ini berjumlah 100 pengunjung event Stage Bus Jazz Tour 2015 dengan teknik purposive sampling. Hasil penelitian secara simultan menunjukkan bahwa event marketing berpengaruh signifikan terhadap brand image rokok Djarum Super Mild. Sedangkan secara parsial menunjukkan bahwa variabel event marketing dengan dimensi involvement tidak berpengaruh signifikan terhadap brand image, interaction tidak berpengaruh signifikan terhadap brand image dengan, intensity berpengaruh signifikan terhadap brand image, individuality tidak berpengaruh signifikan terhadap brand image , innovation berpengaruh signifikan terhadap brand image, integrity tidak berpengaruh signifikan terhadap brand image.   Kata Kunci : Event Marketing, Brand Image, Rokok

  11. PENGARUH KOMUNIKASI, KOORDINASI, USAHA DAN KESETARAAN KONTRIBUSI TERHADAP EFEKTIVITAS AUDIT INTERNAL PEMERINTAH

    OpenAIRE

    GUSRAYANTI KARTA, RIA

    2017-01-01

    2017 ABSTRAK Pengaruh Komunikasi, Koordinasi, Usaha dan Kesetaraan Kontribusi terhadap Efektivitas Audit Internal Pemerintah Effect of Communication, Coordination, Effort and Balance of Member Contribution to Government Internal Audit Effectiveness Ria Gusrayanti Karta Darwis Said Ishak Amsari Penelitian ini bertujuan untuk menguji dan menganalisis pengaruh komunikasi, koordinasi, usaha dan kesetaraan kontribusi terhadap efektivitas audit internal...

  12. High pressure synthesis and investigations of properties of boron allotropes and boron carbide

    International Nuclear Information System (INIS)

    Chuvashova, Irina

    2017-01-01

    This work aimed at the development of the high-pressure high-temperature (HPHT) synthesis of single crystals of boron allotropes and boron-rich compounds, which could be used further for precise investigations of their structures, properties, and behavior at extreme conditions. To summarize, the present work resulted in the HPHT synthesis of the first previously unknown non-icosahedral boron allotrope ζ-B. This finding confirmed earlier theoretical predictions, which stayed unproven for decades because of experimental challenges which couldn't be overcome until recently. Structural stability of α-B and β-B in the Mbar pressure range and B 13 C 2 up to 68 GPa was experimentally proven. Accurate measurements of the unit cell and B 12 icosahedra volumes of the stoichiometric boron carbide B 13 C 2 as a function of pressure led to conclusion that they undergo a similar reduction upon compression that is typical for covalently bonded solids. Neither 'molecular-like' nor 'inversed molecular-like' solid behavior upon compression was detected that has closed a long-standing scientific dispute. A comparison of the compressional behavior of B 13 C 2 with that of α-B and γ-B allotropes and B 4 C showed that it is determined by the types of bonding involved in the course of compression.

  13. Comparison of boron and neon damage effects in boron ion-implanted resistors

    International Nuclear Information System (INIS)

    MacIver, B.A.

    1975-01-01

    Boron and neon damage implants were used in fabricating integrated-circuit resistors in silicon. Resistor properties were studied as functions of damaging ion species and dose. Sheet resistances in the 10 000 Ω/square range were obtained with low temperature and voltage sensitivities and d.c. isolation. (author)

  14. From boron analogues of amino acids to boronated DNA: potential new pharmaceuticals and neutron capture agents

    International Nuclear Information System (INIS)

    Spielvogel, B.F.; Sood, Anup; Duke Univ., Durham, NC; Shaw, B.R.; Hall, I.H.

    1991-01-01

    Isoelectronic and isostructural boron analogues of the α-amino acids ranging from simple glycine analogues such as H 3 NBH 2 COOH and Me 2 NHBH 2 COOH to alanine analogues have been synthesised. A diverse variety of analogues, including precursors and derivatives (such as peptides) have potent pharmacological activity, including anticancer, antiinflammatory, analgesic, and hypolipidemic activity in animal model studies and in vitro cell cultures. Boronated nucleosides and (oligo)nucleotides, synthetic oligonucleotide analogues of ''antisense'' agents interact with a complementary nucleic acid sequence blocking the biological effect of the target sequence. Nucleosides boronated on the pyrimidine and purine bases have been prepared. It has been established that an entirely new class of nucleic acid derivatives is feasible in which one of the non-bridging oxygens in the internucleotide phosphodiester linkage can be replaced by an isoelectronic analogue, the borane group, (BH 3 ). The boronated oligonucleotides can be viewed as hybrids of the normal oxygen oligonucleotides and the methylphosphonate oligonucleotides. (author)

  15. Investigation of Hard Boron Rich Solids: Osmium Diboride and β-Rhombohedral Boron

    Science.gov (United States)

    Hebbache, M.; Živković, D.

    Recently, we succeeded in synthesizing three osmium borides, i.e., OsB1.1, Os2B3 and OsB2. Up to date, almost nothing is known about the physical properties of these materials. Microhardness measurements show that OsB2 is extremely hard. Ab initio calculations show that it is due to formation of covalent bonds between boron atoms. OsB2 is also a low compressibility material. It can be used for hard coatings. The β-rhombohedral polymorph of boron is the second hardest elemental crystal (H ≈ 33 GPa). It is also very light and a p-type semiconductor. In early 1970s, it has been shown that the doping of boron with 3d transition elements enhances its hardness by about 25%. We predict that, in general, heavily doped samples MBx, with x ≤ 31 or equivalently a dopant concentration larger than 3.2 at.%, should be ultrahard, i.e., H > 43 GPa. The relevant dopants M are Al, Cu, Sc, Mn, Mg and Li. In addition to these properties, boron-rich materials have a very low volatility, a high chemical inertness and high melting point. They are suitable for applications under extreme conditions and thermoelectric equipment.

  16. Boron distribution and the effect of lime on boron uptake by pansy, petunia, and gerbera plants

    Science.gov (United States)

    Reports of boron (B) deficiency have become more prevalent in pansy (Viola ×wittrockiana), petunia (Petunia ×hybrida), and gerbera (Gerbera jamesonii) plug production. When symptoms are observed in production the presence and severity of symptoms have no pattern, symptomatic plants can be located a...

  17. High pressure synthesis and investigations of properties of boron allotropes and boron carbide

    Energy Technology Data Exchange (ETDEWEB)

    Chuvashova, Irina

    2017-06-12

    This work aimed at the development of the high-pressure high-temperature (HPHT) synthesis of single crystals of boron allotropes and boron-rich compounds, which could be used further for precise investigations of their structures, properties, and behavior at extreme conditions. To summarize, the present work resulted in the HPHT synthesis of the first previously unknown non-icosahedral boron allotrope ζ-B. This finding confirmed earlier theoretical predictions, which stayed unproven for decades because of experimental challenges which couldn't be overcome until recently. Structural stability of α-B and β-B in the Mbar pressure range and B{sub 13}C{sub 2} up to 68 GPa was experimentally proven. Accurate measurements of the unit cell and B{sub 12} icosahedra volumes of the stoichiometric boron carbide B{sub 13}C{sub 2} as a function of pressure led to conclusion that they undergo a similar reduction upon compression that is typical for covalently bonded solids. Neither 'molecular-like' nor 'inversed molecular-like' solid behavior upon compression was detected that has closed a long-standing scientific dispute. A comparison of the compressional behavior of B{sub 13}C{sub 2} with that of α-B and γ-B allotropes and B{sub 4}C showed that it is determined by the types of bonding involved in the course of compression.

  18. Dynamic response of multiwall boron nitride nanotubes subjected to ...

    Indian Academy of Sciences (India)

    Page 1 ... 1. Introduction. Boron nitride nanotubes (BNNTs) are like carbon nanotubes. (CNTs) in structure in which carbon atoms are replaced by alternate boron and nitrogen atoms. Thus, BNNTs demon- ... istic analyser for intermediate landing situation of inserted mass.15 Also, a macroscopic continuum simulation is sug-.

  19. Highly thermal conductive carbon fiber/boron carbide composite material

    International Nuclear Information System (INIS)

    Chiba, Akio; Suzuki, Yasutaka; Goto, Sumitaka; Saito, Yukio; Jinbo, Ryutaro; Ogiwara, Norio; Saido, Masahiro.

    1996-01-01

    In a composite member for use in walls of a thermonuclear reactor, if carbon fibers and boron carbide are mixed, since they are brought into contact with each other directly, boron is reacted with the carbon fibers to form boron carbide to lower thermal conductivity of the carbon fibers. Then, in the present invention, graphite or amorphous carbon is filled between the carbon fibers to provide a fiber bundle of not less than 500 carbon fibers. Further, the surface of the fiber bundle is coated with graphite or amorphous carbon to suppress diffusion or solid solubilization of boron to carbon fibers or reaction of them. Then, lowering of thermal conductivity of the carbon fibers is prevented, as well as the mixing amount of the carbon fiber bundles with boron carbide, a sintering temperature and orientation of carbon fiber bundles are optimized to provide a highly thermal conductive carbon fiber/boron carbide composite material. In addition, carbide or boride type short fibers, spherical graphite, and amorphous carbon are mixed in the boron carbide to prevent development of cracks. Diffusion or solid solubilization of boron to carbon fibers is reduced or reaction of them if the carbon fibers are bundled. (N.H.)

  20. Eleventh international conference on boron chemistry. Programme and abstracts

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    Abstracts of reports at the Eleventh International Conference on Boron Chemistry are presented. Born chemistry as a connecting bridge between many fields maintains one of the leading positions in modern chemistry. Methods of synthesis of different boron compounds, properties of the compounds, their use in other regions of chemistry and medicine are widely presented in reports.

  1. Feasibility study of SMART core with soluble boron

    International Nuclear Information System (INIS)

    Kim, Kang Seog; Lee, Chung Chan; Zee, Sung Quun

    2000-11-01

    The excess reactivity of SMART core without soluble boron is effectively controlled by 49 CEDM. We suggest another method to control the core excess reactivity using both the checkerboard type of 25 CEDM and soluble boron and perform a feasibility calculation. The soluble boron operation is categorized into the on-line and the off-line mechanisms. The former is to successively control the boron concentration according to the excess reactivity during operation and the latter is to add and change some soluble boron during refueling and repairing. Since the on-line soluble boron control system of SMART is conceptually identical to that of the commercial pressurized water reactor, we did not perform the analysis. Since the soluble boron in the complete off-line system increases the moderator temperature coefficient, the reactivity defect between hot and cold moderator temperature is decreased. However, the decrease of the reactivity is not big to satisfy the core reactivity limits. When using 25 CEDM, the possible mechanism is to control the excess reactivity by both control rod and on-line boron control mechanism between cold and hot zero power and by only control rod at hot full power. We selected the loading pattern satisfying the requirement in the view of nuclear design

  2. Mass spectrometric investigation of vinyl-substituted organic boron compounds

    International Nuclear Information System (INIS)

    Tarielashvili, V.O.; Ordzhonikidze, K.G.; Parulava, L.P.; Vakhaniya, G.V.

    1992-01-01

    Mass spectrometric investigation of vinyl-substituted organic compounds was conducted. Ionization was performed by electron shock. Possibility of determining boron isotope content is all analyzed organic boron vinyl-substituted compounds by direct method is shown. This simplifies sufficiently and lowers the price of analysis, improves its accuracy and rapidity

  3. Determination of free and combined carbon in boron carbide

    International Nuclear Information System (INIS)

    Shankaran, P.S.; Kulkarni, Amit S.; Pandey, K.L.; Ramanjaneyulu, P.S.; Yadav, C.S.; Sayi, Y.S.; Ramakumar, K.L.

    2009-01-01

    A simple, sensitive and fast method for the determination of free and combined carbon in boron carbide samples, based on combustion in presence of oxygen at different temperatures, has been developed. Method has been standardized by analyzing mixture of two different boron carbide samples. Error associated with the method in the determination of free carbon is less than 5%. (author)

  4. The investigation of parameters affecting boron removal by electrocoagulation method

    Energy Technology Data Exchange (ETDEWEB)

    Yilmaz, A. Erdem [Department of Environmental Engineering, Atatuerk University, Faculty of Engineering, Erzurum (Turkey)]. E-mail: aerdemy@atauni.edu.tr; Boncukcuoglu, Recep [Department of Environmental Engineering, Atatuerk University, Faculty of Engineering, Erzurum (Turkey); Kocakerim, M. Muhtar [Department of Chemical Engineering, 25240, Atatuerk University, Faculty of Engineering Erzurum (Turkey); Keskinler, Buelent [Department of Environmental Engineering, Gebze Institute of Technology, Gebze/Kocaeli 41400 (Turkey)

    2005-10-17

    Boron removal from wastewaters by electrocoagulation using aluminum electrode material was investigated in this paper. Several working parameters, such as pH, current density, boron concentration and type and concentration of supporting electrolyte were studied in an attempt to achieve a higher removal capacity. The experiments were carried out by keeping the pH of solution constant and optimum pH of solution was determined 8.0 for the aluminum electrode. Although energy consumption increased with decreasing boron concentration, which conductivity of these solutions were low, boron removal efficiency was higher at 100 mg/L than that of 1000 mg/L. Current density was an important parameter affecting removal efficiency. Boron removal efficiency and energy consumption increased with increasing current density from 1.2 to 6.0 mA/cm{sup 2}. The types of different supporting electrolyte were experimented in order to investigate to this parameter effect on boron removal. The highest boron removal efficiency, 97%, was found by CaCl{sub 2}. Added CaCl{sub 2} increased more the conductivity of solution according to other supporting electrolytes, but decreased energy consumption. The results showed to have a high effectiveness of the electrocoagulation method in removing boron from aqueous solutions.

  5. The investigation of parameters affecting boron removal by electrocoagulation method

    International Nuclear Information System (INIS)

    Yilmaz, A. Erdem; Boncukcuoglu, Recep; Kocakerim, M. Muhtar; Keskinler, Buelent

    2005-01-01

    Boron removal from wastewaters by electrocoagulation using aluminum electrode material was investigated in this paper. Several working parameters, such as pH, current density, boron concentration and type and concentration of supporting electrolyte were studied in an attempt to achieve a higher removal capacity. The experiments were carried out by keeping the pH of solution constant and optimum pH of solution was determined 8.0 for the aluminum electrode. Although energy consumption increased with decreasing boron concentration, which conductivity of these solutions were low, boron removal efficiency was higher at 100 mg/L than that of 1000 mg/L. Current density was an important parameter affecting removal efficiency. Boron removal efficiency and energy consumption increased with increasing current density from 1.2 to 6.0 mA/cm 2 . The types of different supporting electrolyte were experimented in order to investigate to this parameter effect on boron removal. The highest boron removal efficiency, 97%, was found by CaCl 2 . Added CaCl 2 increased more the conductivity of solution according to other supporting electrolytes, but decreased energy consumption. The results showed to have a high effectiveness of the electrocoagulation method in removing boron from aqueous solutions

  6. Effect of boron on growth criteria of some wheat cultivars

    Directory of Open Access Journals (Sweden)

    Ashraf Metwally

    2012-01-01

    Full Text Available Introduction: Toxic soil concentrations of the essential micronutrient boron (B represent major limitations to crop production worldwide. Plants have a range of defense systems that might be involved in their affinity to resist and tolerate nutrients stress.Materials and methods: The experiments were carried out to study the differential responses in five wheat cultivars to boron toxicity. Results: The fresh and dry matter yield of the test wheat cultivars showed marked decrease as the concentration of boron was increased. Elevated concentration of boron had a notable inhibitory effect on the biosynthesis of pigments fractions in the test wheat cultivars as severely as dry matter gain. The adverse concentration effects of boron on some metabolic responses were clearly displayed by shoot and root systems, exhibited in the elevated rates of proline, hydrogen peroxide and malondialdehyde formation. Potassium leakage was severely affected by boron-stress in some cultivars at all tested concentrations, while in some others a moderate damage was manifested only at the higher boron concentrations.Conclusions: Sakha 93 out of all the different cultivars investigated was found to display the lowest sensitivity to boron-stress, while Gemmeza 9 was the most sensitive one.

  7. New applications of the interaction between diols and boronic acids

    NARCIS (Netherlands)

    Duval, F.L.

    2015-01-01

    Florine Duval - New applications of the interaction between diols and boronic acids – Summary

    Chapter 1 introduces the theory and known applications of the interaction between boronic acids and diols, and explains the context of this thesis. Diagnosis of

  8. Contamination of urban garden soils with copper and boron

    Energy Technology Data Exchange (ETDEWEB)

    Purves, D

    1966-06-04

    Spectrochemical analyses of garden soils sampled in the Edinburgh and Dundee areas indicate that there is substantial contamination of urban soils with copper and boron. These soils were analyzed spectrochemically with respect to total copper and water-extractable boron content with the view of comparing the levels obtained in urban areas with levels in arable soils in rural areas. The results indicate that urban garden soils contain about four times as much copper and two to three times as much water-soluble boron as rural arable soils. The existence of such a marked disparity between the levels of two potentially toxic elements in urban and rural areas is evidence of slow poisoning of the soil environment in built-up areas and is cause for concern. While the major source of contamination of soils with copper and boron is still a matter for speculation, it is probable that the addition of soot to garden soils and the fall-out of sooty material in built-up areas where atmospheric pollution is a problem make a substantial contribution to the water-extractable boron content of urban soils. Three samples of soot from domestic chimneys, obtained from independent sources, were found on analysis to contain 640, 650 and 555 p.p.m. water-extractable boron, and it is evident that the addition to soil of even small amounts of soot with a boron content of this order would have a marked effect on its water-extractable boron content.

  9. Preparation of boron-nitrogen films by sputtering

    International Nuclear Information System (INIS)

    Klose, S.; Winde, B.

    1980-01-01

    Hard boron-nitrogen films adherent to various substrates can be prepared by sputtering. IR investigations suggest the existence of cubic boron nitride in certain layers. Transmission electron microscope studies have shown a quasi-amorphous structure irregularly incorporating crystallites of zinc blende structure of some nm in diameter

  10. Production of boron carbide powder by carbothermal synthesis of ...

    Indian Academy of Sciences (India)

    TECS

    weight armour plates etc (Alizadeh et al 2004). It can also be used as a reinforcing material for ceramic matrix composites. It is an excellent neutron absorption material in nuclear industry due to its high neutron absorption co- efficient (Sinha et al 2002). Boron carbide can be prepared by reaction of elemental boron and ...

  11. Eleventh international conference on boron chemistry. Programme and abstracts

    International Nuclear Information System (INIS)

    2002-01-01

    Abstracts of reports at the Eleventh International Conference on Boron Chemistry are presented. Born chemistry as a connecting bridge between many fields maintains one of the leading positions in modern chemistry. Methods of synthesis of different boron compounds, properties of the compounds, their use in other regions of chemistry and medicine are widely presented in reports [ru

  12. Boron Diffusion in Surface-Treated Framing Lumber

    Science.gov (United States)

    Patricia K. Lebow; Stan T. Lebow; Steven A. Halverson

    2013-01-01

    The extent of boron penetration in framing lumber treated by spray applications during construction is not well quantified. This study evaluated the effect of formulation and concentration on diffusion of boron in lumber specimens that were equilibrated in conditions that produced wood moisture contents of 18 to 21 percent. One set of specimens was pressure treated...

  13. Design, Fabrication and Performance of Boron-Carbide Control Elements

    International Nuclear Information System (INIS)

    Brammer, H.A.; Jacobson, J.

    1964-01-01

    A control blade design, incorporating boron-carbide (B 4 C) in stainless-steel tubes, was introduced into service in boiling water reactors in April 1961. Since that time this blade has become the standard reference control element in General Electric boiling-water reactors, replacing the 2% boron-stainless-steel blades previously used. The blades consist of a sheathed, cruciform array of small vertical stainless-steel tubes filled with compácted boron-carbide powder. The boron-carbide powder is confined longitudinally into several independent compartments by swaging over ball bearings located inside the tubes. The development and use of boron-carbide control rods is discussed in five phases: 1. Summary of experience with boron-steel blades and reasons for transition to boron-carbide control; 2. Design of the boron-carbide blade, beginning with developmental experiments, including early measurements performed in the AEC ''Control Rod Material and Development Program'' at the Vallecitos Atomic Laboratory, through a description of the final control blade configuration; 3. Fabrication of the blades and quality control procedures; 4. Results of confirmatory pre-operational mechanical and reactivity testing; and 5. Post-operational experience with the blades, including information on the results of mechanical inspection and reactivity testing after two years of reactor service. (author) [fr

  14. Boron-based nanostructures: Synthesis, functionalization, and characterization

    Science.gov (United States)

    Bedasso, Eyrusalam Kifyalew

    Boron-based nanostructures have not been explored in detail; however, these structures have the potential to revolutionize many fields including electronics and biomedicine. The research discussed in this dissertation focuses on synthesis, functionalization, and characterization of boron-based zero-dimensional nanostructures (core/shell and nanoparticles) and one-dimensional nanostructures (nanorods). The first project investigates the synthesis and functionalization of boron-based core/shell nanoparticles. Two boron-containing core/shell nanoparticles, namely boron/iron oxide and boron/silica, were synthesized. Initially, boron nanoparticles with a diameter between 10-100 nm were prepared by decomposition of nido-decaborane (B10H14) followed by formation of a core/shell structure. The core/shell structures were prepared using the appropriate precursor, iron source and silica source, for the shell in the presence of boron nanoparticles. The formation of core/shell nanostructures was confirmed using high resolution TEM. Then, the core/shell nanoparticles underwent a surface modification. Boron/iron oxide core/shell nanoparticles were functionalized with oleic acid, citric acid, amine-terminated polyethylene glycol, folic acid, and dopamine, and boron/silica core/shell nanoparticles were modified with 3-(amino propyl) triethoxy silane, 3-(2-aminoethyleamino)propyltrimethoxysilane), citric acid, folic acid, amine-terminated polyethylene glycol, and O-(2-Carboxyethyl)polyethylene glycol. A UV-Vis and ATR-FTIR analysis established the success of surface modification. The cytotoxicity of water-soluble core/shell nanoparticles was studied in triple negative breast cancer cell line MDA-MB-231 and the result showed the compounds are not toxic. The second project highlights optimization of reaction conditions for the synthesis of boron nanorods. This synthesis, done via reduction of boron oxide with molten lithium, was studied to produce boron nanorods without any

  15. Problems and possibilities of development of boron nitride ceramics

    International Nuclear Information System (INIS)

    Rusanova, L.N.; Romashin, A.G.; Kulikova, G.I.; Golubeva, O.P.

    1988-01-01

    The modern state of developments in the field of technology of ceramics produced from boron nitride is analyzed. Substantial difficulties in production of pure ceramics from hexagonal and wurtzite-like boron nitride are stated as related to the structure peculiarities and inhomogeneity of chemical bonds in elementary crystal cells of various modifications. Advantages and disadvantages of familiar technological procedures in production of boron nitride ceramics are compared. A new technology is suggested, which is based on the use of electroorganic compounds for hardening and protection of porous high-purity boron-nitride die from oxidation, and as high-efficient sintered elements for treatment of powders of various structures and further pyrolisis. The method is called thermal molecular lacing (TML). Properties of ceramics produced by the TML method are compared with characteristics of well-known brands of boron nitride ceramics

  16. Fracture toughness of borides formed on boronized ductile iron

    International Nuclear Information System (INIS)

    Sen, Ugur; Sen, Saduman; Koksal, Sakip; Yilmaz, Fevzi

    2005-01-01

    In this study, fracture toughness properties of boronized ductile iron were investigated. Boronizing was realized in a salt bath consisting of borax, boric acid and ferro-silicon. Boronizing heat treatment was carried out between 850 and 950 deg. C under the atmospheric pressure for 2-8 h. Borides e.g. FeB, Fe 2 B formed on ductile iron was verified by X-ray diffraction (XRD) analysis, SEM and optical microscope. Experimental results revealed that longer boronizing time resulted in thicker boride layers. Optical microscope cross-sectional observation of borided layers showed dentricular morphology. Both microhardness and fracture toughness of borided surfaces were measured via Vickers indenter. The harnesses of borides formed on the ductile iron were in the range of 1160-2140 HV 0.1 and fracture toughness were in the range of 2.19-4.47 MPa m 1/2 depending on boronizing time and temperature

  17. An overview the boron dilution issue in PWRs

    International Nuclear Information System (INIS)

    Hyvaerinen, J.

    1994-01-01

    The presentation is an overview of boron (boric acid) dilution in pressurized water reactors (PWRs). Boric acid has been widely used in PWRs as a dissolved poison, as one of the main reactivity controlling means, for a long time, from nearly but not quite from the beginning of the design, construction and operation of PWRs in the present-day sense. The specific safety issue, namely the risk of uncontrolled reactivity insertion due to inadvertent boron dilution, is discussed first, followed by a brief look on the history of boron usage in PWRs. A discussion of boron dilution phenomenology is presented next in general terms. Some particular concerns that boron dilution phenomena arouse in the minds of a regulator will also be presented before concluding with a brief look on the future of dissolved poisons. (11 refs.)

  18. Morphological and electrochemical studies of spherical boron doped diamond electrodes

    Energy Technology Data Exchange (ETDEWEB)

    Mendes de Barros, R.C. [IQ/USP, Av. Lineu Prestes, 748, Bloco 2 Superior, Cidade Universitaria, Sao Paulo/SP, 05508-900 (Brazil); Ferreira, N.G. [LAS/INPE, Av. dos Astronautas, 1758, Jardim da Granja, Sao Jose dos Campos/SP, 12245-970 (Brazil); Azevedo, A.F. [LAS/INPE, Av. dos Astronautas, 1758, Jardim da Granja, Sao Jose dos Campos/SP, 12245-970 (Brazil); Corat, E.J. [LAS/INPE, Av. dos Astronautas, 1758, Jardim da Granja, Sao Jose dos Campos/SP, 12245-970 (Brazil); Sumodjo, P.T.A. [IQ/USP, Av. Lineu Prestes, 748, Bloco 2 Superior, Cidade Universitaria, Sao Paulo/SP, 05508-900 (Brazil); Serrano, S.H.P. [IQ/USP, Av. Lineu Prestes, 748, Bloco 2 Superior, Cidade Universitaria, Sao Paulo/SP, 05508-900 (Brazil)]. E-mail: shps@iq.usp.br

    2006-08-14

    Morphological and electrochemical characteristics of boron doped diamond electrode in new geometric shape are presented. The main purpose of this study is a comparison among voltammetric behavior of planar glassy carbon electrode (GCE), planar boron doped diamond electrode (PDDE) and spherical boron doped diamond electrode (SDDE), obtained from similar experimental parameters. SDDE was obtained by the growth of boron doped film on textured molybdenum tip. This electrode does not present microelectrode characteristics. However, its voltammetric peak current, determined at low scan rates, is largest associated to the smallest {delta}E {sub p} values for ferrocyanide system when compared with PDDE or GCE. In addition, the capacitance is about 200 times smaller than that for GCE. These results show that the analytical performance of boron doped diamond electrodes can be implemented just by the change of sensor geometry, from plane to spherical shape.

  19. Boron effect on stainless steel plasticity under hot deformation

    International Nuclear Information System (INIS)

    Bulat, S.I.; Kardonov, B.A.; Sorokina, N.A.

    1978-01-01

    The effect of boron on plasticity of stainless steels at temperatures of hot deformation has been studied at three levels of alloying, i.e. 0-0.01% (micro-alloying or modifying), 0.01-0.02% (low alloying) and 0.02-2.0% (high alloying). Introduction of 0.001-0.005% of boron increases hot plasticity of both low and high carbon stainless steels due to decrease in grain size and strengthening of grain boundaries. Microalloying by boron has a positive effect at temperatures below 1200-1220 deg C. At higher temperatures, particularly when its content exceeds 0.008%, boron deteriorates plasticity by increasing the size of grains and weakening their boundaries. 0.1-2% boron strengthen the stainless steel and dectease its plasticity

  20. Impact of Boron pollution to Biota Marine aquatic

    International Nuclear Information System (INIS)

    Heni Susiati; Yarianto-SBS; Imam Hamzah; Fepriadi

    2003-01-01

    Power plants and industrial facilities can release potentially harmful chemicals, like boron through direct aqueous discharges or cycling of cooling water to aquatic ecosystems environmental at plant surrounding. Boron is an essential trace element for the growth of marine biota, but can be toxic in excessive amount. Therefore will adversely affect of growth, reproduction or survival. Toxicity to aquatic organism, including vertebrates, invertebrates and plants can vary depending on the organism's life stage and environment. It is recommended that the maximum concentration of total boron for the protection of marine aquatic life should not exceed 1,2 mg B/L. Early stages of life cycle are more sensitive to boron than later ones, and the use of reconstituted water shows higher toxicity in lower boron concentrations than natural waters. (author)

  1. Additive Manufacturing of Dense Hexagonal Boron Nitride Objects

    Energy Technology Data Exchange (ETDEWEB)

    Marquez Rossy, Andres E [ORNL; Armstrong, Beth L [ORNL; Elliott, Amy M [ORNL; Lara-Curzio, Edgar [ORNL

    2017-05-12

    The feasibility of manufacturing hexagonal boron nitride objects via additive manufacturing techniques was investigated. It was demonstrated that it is possible to hot-extrude thermoplastic filaments containing uniformly distributed boron nitride particles with a volume concentration as high as 60% and that these thermoplastic filaments can be used as feedstock for 3D-printing objects using a fused deposition system. Objects 3D-printed by fused deposition were subsequently sintered at high temperature to obtain dense ceramic products. In a parallel study the behavior of hexagonal boron nitride in aqueous solutions was investigated. It was shown that the addition of a cationic dispersant to an azeotrope enabled the formulation of slurries with a volume concentration of boron nitride as high as 33%. Although these slurries exhibited complex rheological behavior, the results from this study are encouraging and provide a pathway for manufacturing hexagonal boron nitride objects via robocasting.

  2. Boron determination in tourmaline by neutron induced radiography

    Energy Technology Data Exchange (ETDEWEB)

    Qureshi, A.A. E-mail: aaqureshi@pinstech.org.pk; Akram, M.; Ayub Khan, M.; Khattak, N.U.; Qureshi, I.E.; Khan, H.A

    2001-06-01

    The technique of neutron induced radiography has been applied to determine the boron concentration and its spatial distribution in mineral tourmaline collected from Swat Tourmaline Granite, Northern Pakistan. The technique involves the simultaneous irradiation of sample and a standard fixed on a track detector with thermal neutrons and the counting of alpha and {sup 7}Li tracks produced in the detector from the nuclear reaction {sup 10}B(n,{alpha}){sup 7}Li. Boron concentration is determined by comparing the {sup 7}Li and alpha particle tracks density with that of a standard of known boron concentration. Boron concentration in tourmaline has been found to be (3.40{+-}0.01)% in this study which is on the upper side within the normal range (2.5-3.8)% reported in the world. The presence of somewhat higher concentration of boron in tourmaline indicates that the Swat Tourmaline Granite was generated as a late stage hydrothermal activity during the Himalayan Orogeny.

  3. Pengaruh Appointment Registration System terhadap Waktu Tunggu dan Kepuasan Pasien

    Directory of Open Access Journals (Sweden)

    Yuli Susanti

    2015-02-01

    Full Text Available Abstrak Peningkatan derajat kesehatan dapat dicapai melalui kemudahan akses terhadap fasilitas kesehatan. Peningkatan peserta pada program Jaminan Kesehatan Nasional (JKN mengakibatkan antrian panjang di sarana pelayanan kesehatan. Penelitian ini bertujuan untuk menganalisis pengaruh metode appointment registration system (ARS terhadap waktu tunggu dan kepuasan pasien. Metode penelitian yang digunakan adalah survei dengan sampel 380 orang dan observasi pada bulan Desember 2014 di RS Al-Islam Bandung. Analisis menggunakan structural equation modeling (SEM dan production operation management-quantitative methods (POMQM. Hasil penelitian diperoleh kondisi pelaksanaan ARS (60,7%, waktu tunggu (59,1%, dan kepuasan pasien (67,3% termasuk dalam kategori cukup. Terdapat pengaruh positif dan signifikan ARS terhadap waktu tunggu (51,84%, pengaruh positif dan signifikan waktu tunggu terhadap kepuasan pasien (25%, dan total pengaruh ARS terhadap kepuasan pasien (16,79%. ARS dapat menurunkan waktu tunggu secara efektif tetapi tidak semua metode ARS dapat menurunkan waktu tunggu. Simpulan, pasien RS Al-Islam Bandung merasa cukup puas terhadap pendaftaran appointment dan waktu tunggu. Kata kunci: Appointment registration system, kepuasan pasien, waktu tunggu   The Influence of Outpatient Appointment Registration System to Waiting Time and Patient Satisfications Abstract Health improvement can be achieved through accessibility to health services. An increased participants in the Health Insurance Program (HIP resulted in a long queue in the hospital. This research aim was to analize influence of appointment registration system (ARS to waiting time and patient satisfaction. Research method using patient satisfaction survey in 380 subjects and observation on December 2014 at Al-Islam Bandung Hospital. The result was analyzed using structural equation modeling (SEM and production operation management-quantitative methods (POMQM. The results showed that the

  4. KORELASI KREATIVITAS DAN MOTIVASI KERJA GURU TERHADAP PENINGKATAN MUTU PEMBELAJARAN

    Directory of Open Access Journals (Sweden)

    Muh Nashiruddin

    2016-10-01

    Full Text Available Penelitian ini bertujuan untuk mengetahui korelasi antara: 1 kreativitas guru PAI terhadap peningkatan mutu pembelajaran Pendidikan Agama dan Budi Pekerti  , 2 motivasi kerja guru PAI terhadap peningkatan mutu pembelajaran Pendidikan Agama dan Budi Pekerti , dan 3 kreativitas dan motivasi kerja guru terhadap peningkatan mutu pembelajaran Pendidikan Agama dan Budi. Penelitian ini menggunakan metode deskripsi korelasional dengan melibatkan 33 orang sampel yang dipilih secara dengan metode sensus.  Teknik pengumpulan data dilakukan dengan angket/kuesioner. Teknikanalisis data diawali dengan  uji prasyarat yaitu uji normalitas dan linieritas. Uji hipotesis menggunakanuji regresi sederhana danuji regresi ganda. Hasil penelitian menunjukkan ; 1 Kreativitas guru berpengaruh terhadap peningkatan mutu pembelajaran Pendidikan Agama Islam dan Budi Pekerti.  2  motivasi kerja guru  berpengaruh terhadap peningkatan mutu pembelajaran Pendidikan Agama Islam dan Budi Pekerti.  3 kreativitas guru  dan motivasi kerja guru secara bersama-sama atau simultan berpengaruh terhadap mutu pembelajaran.  Hasil analisis juga  menunjukkan bahwa rata-rata nilai dari ketiga variabel tersebut hanya dapat dimasukkan dalam kategori sedang, sehingga  untuk meningkatkan kinerja guru dalam mengajar perlu diperhatikan faktor-faktor lain seperti: gaji, jaminan kerja, jaminan hari tua, penghargaan atas prestasi kerja, dan sebagainya.   Kata kunci: kreativitas, motivasi, mutupembelajaran   Abstract [The Relationship Between Teachers’ Creativity and Motivation Toward Learning Improvement]. This research aim at determine the correlation between the creativity of teachers on the improvement of learning quality of religious education and behavior, the work motivation of teachers on the improvement of learning quality of religious education and behavior, and  the creativity and the work motivation of eachers on the improvement  of learning quality of religious education and

  5. INDUSTRI PENGOLAHAN HASIL PERTANIAN PANGAN DAN HUBUNGANNYA TERHADAP PEREKONOMIAN DESA

    Directory of Open Access Journals (Sweden)

    Soekadri Soekadri

    2016-10-01

    Full Text Available ABSTRAK Aktivitas industri yang berkembang dan terkait dengan perekonomian perdesaan di DAS Progo sampai dewasa ini masih merupakan suatu harapan. Hal ini karena sektor industri manufaktur dianggap memiliki kemampuan besar dalam memecahkan masalah berkaitan dengan aspek pendapatan, kesempatan kerja maupun penyerapan tenaga kerja, tetapi kenyataannya di berbagai tempat kemampuannya masih disangsikan karena berbagai sebab. Kesenjangan ini mendasari penelitian yang bertujuan untuk (1 memahami karakteristik faktor-faktor produksi dan faktor lokasi industri, serta pengaruhnya terhadap perkembangan Industri Hasil Pertanian Pangan (IHP; (2 mengkaji efek pelipatgandaan aktifitas IHP terhadap penyerapan tenaga kerja, dan peluang usaha; (3 dan mengkaji hubungan antara kebijaksanaan pembangunan industri oleh pemerintah, khususnya pembinaan usaha terhadap perkembangan IHP di daerah penelitian. Metode yang digunakan adalah survei terhadap pengusaha IHP. Lokasi desa yang dipilih sebagai sampel kasus desa penelitian ditentukan secara purposive sampling, yaitu Desa Trimurti Kabupaten Bantul Propinsi Daerah Istimewa Yogyakarta, Desa Banyuraden Kabupaten Sleman Daerah Istimewa Yogyakarta, dan Desa Sumurarum Kabupaten Magelang Propinsi Jawa Tengah. Responden adalah petani sekaligus pengusaha IHP, dengan jumlah sampel masing-masing desa 40 KK petani pengusaha IHP ditentukan dengan cara kuota. Analisis data menggunakan uji koefisien korelasi parsial dan ganda serta uji Kendall’s tau-b. Hasil penelitian menunjukkan pada dasarnya ekonomi IHP di ketiga desa kasus penelitian dapat berkembang, ditunjukkan oleh adanya perkembangan kesempatan usaha, dan kesempatan kerja, dan juga berpengaruhnya terhadap perkembangan perekonomian desa-desa tersebut. Hal ini disebabkan oleh faktor kebijakan pemerintah yang sangat berpengaruh terhadap perkembangan proses produksi IHP. Perkecualian terjadi di Desa Banyuraden karena lokasinya dekat Kota Yogyakarta, dimana pengaruh faktor

  6. Permodelan Risiko Kenaikan Tarif Dasar Listrik Terhadap Biaya Produksi Kapal Baru

    Directory of Open Access Journals (Sweden)

    Very Purwo Nugroho

    2012-09-01

    Full Text Available Pada Tugas Akhir dikembangkan model risiko pengaruh kenaikan Tarif Dasar Listrik terhadap biaya produksi kapal baru. Variabel yang terpengaruh kenaikan TDL pada produksi kapal didapatkan dengan identifikasi dan evaluasi pemakaian energi listrik pada fasilitas produksi, pengaruh terhadap tenaga kerja serta pengaruh terhadap biaya material dan komponen  kapal. Material dan komponen tersebut dikelompokan menjadi material lokal manufaktur (Local Manufacture, lokal CKD (Completely Knock-Down, import CBU (Completely Built-Up dan import trading. Model yang dikembangkan mempunyai variabel yang terpengaruh kenaikan TDL terdiri dari (i kenaikan biaya listrik dan (ii kenaikan harga material yang sensitif terhadap kenaikan TDL. Material dan komponen yang sensitif terhadap kenaikan TDL  yaitu material kelompok lokal manufaktur seperti pelat baja dan konsumabel gas serta kelompok lokal CKD (Completely Knock-Down seperti pendingin ruangan (Air Conditioner Equipment, Main Switch Board (MSB dan Alarm Monitoring System (AMS.

  7. DAMPAK HUKUMAN FISIK TERHADAP PERILAKU DELINKUEN REMAJA

    Directory of Open Access Journals (Sweden)

    Nelly Marhayati

    2013-07-01

    Full Text Available Abstrak: Tulisan ini bertujuan untuk mengetahui dampak pemberian hukuman fisik ter-hadap perkembangan perilaku delinkuen remaja. Remaja berada pada tahapan pencarian jati diri dalam prakteknya banyak mengalami guncangan, seperti ta-wuran, narkoba, perbuatan kriminal, sex bebas dan lain sebagainya. Dalam hal terjadinya penyimpangan perilaku, perilaku delinkuen juga sangat mungkin ter-jadi pada periode perkembangan remaja. Perilaku delinkuen ini diartikan sebagai perilaku anak yang nakal bahkan cenderung kepada melanggar hukum. Banyak penyebab terjadinya perilaku delinkuen ini. Berdasarkan beberapa sumber yang penulis paparkan ternyata pemberian hukuman fisik pada anak di sekolah bukan faktor utama perilaku delinkuen remaja. Namun, dalam tulisan ini belum dibahas secara medetail bagaimana jika hukuman fisik tersebut diterima anak dari pola asuh orangtua. Artinya hukuman fisik didapatkan anak dari orangtuanya di rumah. Abstract: This paper aims at finding out whether there is the effect of corporal punishment toward delinquency adolescent behavioral development or not. Adolescent who struggle with sense of identity experienced many shocks for instance involving in brawl, drugs, crime, free sex and so forth. In relation to the case, the delinquency behavior occur likely in the period of adolescent development. The delinquency behavior is interpreted as a naughty child behavior even it inclined to break the law. There are many of causes of this delinquency behavior. According to some sources that the authors describe, it shows that physical punishment of children in schools is not a major factor of delinquency adolescent behavior. However, in this paper, it has not been discussed in detail if the physical punishment of children received parental upbringing. This means that the physical punishment of children got from their parents at home.

  8. Pengaruh Karakteristik Perusahaan terhadap Pengungkapan Laporan Tahunan

    Directory of Open Access Journals (Sweden)

    Linda Agustina

    2012-03-01

    Full Text Available Tujuan dari penelitian ini adalah untuk menguji karakteristik perusahaan (liquidity, profitability, company size, and public stock ownership yang mempengaruhi  disclousure laporan tahunan baik secara parsial maupun simultan. Populasi pada penelitian ini  adalah properti dan perusahaan real estate di Bursa Efek Indonesia (BEI dari tahun 2008-2009. Sampelnya adalah 62 perusahaan yang diambil melalui purposive sampling. Data dianalisis dengan menggunakan Analisis Regresi Berganda dibantu oleh SPSS 16 untuk  windowsnya. Hasil penelitian menunjukkan bahwa secara simultan likuiditas, profitabilitas, ukuran perusahaan, dan kepemilikan saham publik mempe-ngaruhi disclousure laporan tahunan. Dan secara parsial, likuiditas, profitabilitas, dan kepemilikan saham publik mempengaruhi disclousure laporan tahunan, sementara itu ukuran perusahaan berpengaruh terhadap disclousure laporan tahunan. The objective of this study is to examine the firm’s characteristics (liquidity, profitability, company size, and public stock ownership that effect on the disclousure of annual report either partially or simultaneously. The population of this reseacrh was property and real estate companies in Indonesian Stock Exchange (IDX of   2008-2009. The samples are 62 companies,  taken by applying purposive  sampling. The data are analyzed by using Multiple Regression Analysis assisted by SPSS 16 for windows. The research result indicates that liquidity, profitability, company size, and public stock ownership influenced the disclousure of annual report simultaneously. Partially, liquidity, profitability, and public stock ownership  do not influence the disclousure of annual report, while company size influences the disclousure of annual report.

  9. PENGARUH RIGHT ISSUE TERHADAP KINERJA KEUANGAN PERUSAHAAN

    Directory of Open Access Journals (Sweden)

    Ibnu Khajar

    2010-03-01

    Full Text Available Penelitian ini menyelidiki pengaruh right issue terhadap kinerja keuangan perusahaan yang go public di Bursa Efek Indonesia. Sampel meliputi dua puluh satu perusahaan yang melakukan right issue dari tahun 2003-2006. Variabel penelitian adalah kinerja keuangan yang diukur dengan rasio likuiditas, leverage, profitabilitas, aktivitas, dan rasio pasar. Paired t-test dan uji Wilcoxon digunakan untuk menentukan perbedaan kinerja keuangan sebelum dan sesudah right issue. Dari rasio kinerja likuiditas, leverage, profitabilitas, aktivitas, dan rasio pasar (Rasio Lancar, Hutang Jumlah Untuk Jumlah Aktiva, Net Profit Margin, Asset Turn Over dan Rasio Price Earning pada dua tahun sebelum dan dua tahun setelah right issue, hanya dua rasio-Harga Earning ratio dan Current Ratio secara signifikan berbeda pada sebelum dan sesudah right issue. Kedua rasio ini meningkat secara signifikan. This study investigated the effect of right issue on the financial performance of companies that go public on the Indonesian Stock Exchange. The sample included twenty-one company that does the right issue from the years 2003-2006. Research variable is financial performance as measured by the liquidity ratio, leverage, profitability, activity, and the ratio of the market. Paired t-test and Wilcoxon test used to determine differences in financial performance before and after the rights issue. From the performance ratios of liquidity, leverage, profitability, activity, and the market ratio (Current Ratio, Total Debt To Total Assets, Net Profit Margin, Asset Turn Over and Price Earning Ratio at two years before and two years after the right issue, only two ratio--Price Earning Ratio and Current Ratio are significantly different at the before and after the rights issue. Both these ratios increased significantly.

  10. Numerical simulation of boron injection in a BWR

    Energy Technology Data Exchange (ETDEWEB)

    Tinoco, Hernan, E-mail: htb@forsmark.vattenfall.s [Forsmarks Kraftgrupp AB, SE-742 03 Osthammar (Sweden); Buchwald, Przemyslaw [Reactor Technology, Royal Institute of Technology, SE-100 44 Stockholm (Sweden); Frid, Wiktor, E-mail: wiktor@reactor.sci.kth.s [Reactor Technology, Royal Institute of Technology, SE-100 44 Stockholm (Sweden)

    2010-02-15

    The present study constitutes a first step to understand the process of boron injection, transport and mixing in a BWR. It consists of transient CFD simulations of boron injection in a model of the downcomer of Forsmark's Unit 3 containing about 6 million elements. The two cases studied are unintentional start of boron injection under normal operation and loss of offsite power with partial ATWS leaving 10% of the core power uncontrolled. The flow conditions of the second case are defined by means of an analysis with RELAP5, assuming boron injection start directly after the first ECCS injection. Recent publications show that meaningful conservative results may be obtained for boron or thermal mixing in PWRs with grids as coarse as that utilized here, provided that higher order discretization schemes are used to minimize numerical diffusion. The obtained results indicate an apparently strong influence of the scenario in the behavior of the injection process. The normal operation simulation shows that virtually all boron solution flows down to the Main Recirculation Pump inlet located directly below the boron inlet nozzle. The loss of offsite power simulation shows initially a spread of the boron solution over the entire sectional area of the lower part of the downcomer filled with colder water. This remaining effect of the ECCS injection lasts until all this water has left the downcomer. Above this region, the boron injection jet develops in a vertical streak, eventually resembling the injection of the normal operation scenario. Due to the initial spread, this boron injection will probably cause larger temporal and spatial concentration variations in the core. In both cases, these variations may cause reactivity transients and fuel damage due to local power escalation. To settle this issue, an analysis using an extended model containing the downcomer, the MRPs and the Lower Plenum will be carried out. Also, the simulation time will be extended to a scale of

  11. Numerical simulation of boron injection in a BWR

    International Nuclear Information System (INIS)

    Tinoco, Hernan; Buchwald, Przemyslaw; Frid, Wiktor

    2010-01-01

    The present study constitutes a first step to understand the process of boron injection, transport and mixing in a BWR. It consists of transient CFD simulations of boron injection in a model of the downcomer of Forsmark's Unit 3 containing about 6 million elements. The two cases studied are unintentional start of boron injection under normal operation and loss of offsite power with partial ATWS leaving 10% of the core power uncontrolled. The flow conditions of the second case are defined by means of an analysis with RELAP5, assuming boron injection start directly after the first ECCS injection. Recent publications show that meaningful conservative results may be obtained for boron or thermal mixing in PWRs with grids as coarse as that utilized here, provided that higher order discretization schemes are used to minimize numerical diffusion. The obtained results indicate an apparently strong influence of the scenario in the behavior of the injection process. The normal operation simulation shows that virtually all boron solution flows down to the Main Recirculation Pump inlet located directly below the boron inlet nozzle. The loss of offsite power simulation shows initially a spread of the boron solution over the entire sectional area of the lower part of the downcomer filled with colder water. This remaining effect of the ECCS injection lasts until all this water has left the downcomer. Above this region, the boron injection jet develops in a vertical streak, eventually resembling the injection of the normal operation scenario. Due to the initial spread, this boron injection will probably cause larger temporal and spatial concentration variations in the core. In both cases, these variations may cause reactivity transients and fuel damage due to local power escalation. To settle this issue, an analysis using an extended model containing the downcomer, the MRPs and the Lower Plenum will be carried out. Also, the simulation time will be extended to a scale of several

  12. Packing C60 in Boron Nitride Nanotubes

    Science.gov (United States)

    Mickelson, W.; Aloni, S.; Han, Wei-Qiang; Cumings, John; Zettl, A.

    2003-04-01

    We have created insulated C60 nanowire by packing C60 molecules into the interior of insulating boron nitride nanotubes (BNNTs). For small-diameter BNNTs, the wire consists of a linear chain of C60 molecules. With increasing BNNT inner diameter, unusual C60 stacking configurations are obtained (including helical, hollow core, and incommensurate) that are unknown for bulk or thin-film forms of C60. C60 in BNNTs thus presents a model system for studying the properties of dimensionally constrained ``silo'' crystal structures. For the linear-chain case, we have fused the C60 molecules to form a single-walled carbon nanotube inside the insulating BNNT.

  13. Stability analysis of zigzag boron nitride nanoribbons

    Energy Technology Data Exchange (ETDEWEB)

    Rai, Hari Mohan, E-mail: rai.2208@gmail.com; Late, Ravikiran; Saxena, Shailendra K.; Kumar, Rajesh; Sagdeo, Pankaj R. [Indian Institute of Technology, Indore –452017 (India); Jaiswal, Neeraj K. [Discipline of Physics, PDPM- Indian Institute of Information Technology, Design and Manufacturing, Jabalpur – 482005 (India); Srivastava, Pankaj [Computational Nanoscience and Technology Lab. (CNTL), ABV- Indian Institute of Information Technology and Management, Gwalior – 474015 (India)

    2015-05-15

    We have explored the structural stability of bare and hydrogenated zigzag boron nitride nanoribbons (ZBNNRs). In order to investigate the structural stability, we calculate the cohesive energy for bare, one-edge and both edges H-terminated ZBNNRs with different widths. It is found that the ZBNNRs with width Nz=8 are energetically more favorable than the lower-width counterparts (Nz<8). Bare ZBNNRs have been found energetically most stable as compared to the edge terminated ribbons. Our analysis reveals that the structural stability is a function of ribbon-width and it is not affected significantly by the type of edge-passivation (one-edge or both-edges)

  14. Magnesium doping of boron nitride nanotubes

    Science.gov (United States)

    Legg, Robert; Jordan, Kevin

    2015-06-16

    A method to fabricate boron nitride nanotubes incorporating magnesium diboride in their structure. In a first embodiment, magnesium wire is introduced into a reaction feed bundle during a BNNT fabrication process. In a second embodiment, magnesium in powder form is mixed into a nitrogen gas flow during the BNNT fabrication process. MgB.sub.2 yarn may be used for superconducting applications and, in that capacity, has considerably less susceptibility to stress and has considerably better thermal conductivity than these conventional materials when compared to both conventional low and high temperature superconducting materials.

  15. Synthesis of boron-containing heterocyclic compounds

    International Nuclear Information System (INIS)

    Azev, Yuri; Slepukhina, Irina; Gabel, Detlef

    2004-01-01

    The synthesis of boron-containing 1,3,5-triazines and 1,2,4-triazines is described. Derivatives of 1,3,5-triazine containing the o-carborane cluster have been obtained by reacting the corresponding propargyl derivatives with B 10 H 14 . Derivatives of 1,2,4-triazine containing the B 12 H 12 2- cluster have been obtained by nucleophilic substitution of ethylsulfone derivatives with B 12 H 11 SH 2- . They have been isolated in their ring-protonated form. Reaction of RNH 2 -B 8 H 11 NH-R with stericly demanding heterocycles failed, either for steric or for solubility reasons

  16. Salinity’s influence on boron toxicity in broccoli: II. Impacts on boron uptake, uptake mechanisms and tissue ion relations.

    Science.gov (United States)

    Limited research has been conducted on the interactive effects of salinity and boron stresses on plants despite their common occurrence in natural systems. The purpose of this research was to determine and quantify the interactive effects of salinity, salt composition and boron on broccoli (Brassica...

  17. Continued biological investigations of boron-rich oligomeric phosphate diesters (OPDs). Tumor-selective boron agents for BNCT

    International Nuclear Information System (INIS)

    Lee, Mark W.; Shelly, Kenneth; Kane, Robert R.; Hawthorne, M. Frederick

    2006-01-01

    Clinical success of Boron Neutron Capture Therapy will rely on the selective intracellular delivery of high concentrations of boron-10 to tumor tissue. In order for a boron agent to facilitate clinical success, the simultaneous needs of obtaining a high tumor dose, high tumor selectivity, and low systemic toxicity must be realized. Boron-rich oligomeric phosphate diesters (OPDs) are a class of highly water-soluble compounds containing up to 40% boron by weight. Previous work in our groups demonstrated that once placed in the cytoplasm of tumor cells, OPDs quickly accumulate within the cell nucleus. The objective of the current study was to determine the biodistribution of seven different free OPDs in BALB/c mice bearing EMT6 tumors. Fructose solutions containing between 1.4 and 6.4 micrograms of boron per gram of tissue were interveinously injected in mice seven to ten days after tumor implantation. At intervals during the study, animals were euthanized and samples of tumor, blood, liver, kidney, brain and skin were collected and analyzed for boron content using ICP-AES. Tumor boron concentrations of between 5 and 29 ppm were achieved and maintained over the 72-hour time course of each experiment. Several OPDs demonstrated high tumor selectivity with one oligomer exhibiting a tumor to blood ratio of 35:1. The apparent toxicity of each oligomer was assessed through animal behavior during the experiment and necropsy of each animal upon sacrifice. (author)

  18. Meeting the challenge of homogenous boron targeting of heterogeneous tumors for effective boron neutron capture therapy (BNCT)

    International Nuclear Information System (INIS)

    Heber, Elisa M.; Trivillin, Veronica A.; Itoiz, Maria E.; Rebagliati, J. Raul; Batistoni, Daniel; Kreimann, Erica L.; Schwint, Amanda E.; Nigg, David W.; Gonzalez, Beatriz N.

    2006-01-01

    BNCT is a tumor cell targeted radiation therapy. Inadequately boron targeted tumor populations jeopardize tumor control. Meeting the to date unresolved challenge of homogeneous targeting of heterogeneous tumors with effective boron carriers would contribute to therapeutic efficacy. The aim of the present study was to evaluate the degree of variation in boron content delivered by boronophenylalanine (BPA), GB-10 (Na 2 10 B 10 H 10 ) and the combined administration of (BPA+GB-10) in different portions of tumor, precancerous tissue around tumor and normal pouch tissue in the hamster cheek pouch oral cancer model. Boron content was evaluated by ICP-AES. The degree of homogeneity in boron targeting was assessed in terms of the coefficient of variation ([S.D./Mean]x100) of boron values. Statistical analysis of the results was performed by one-way ANOVA and the least significant difference test. GB-10 and GB-10 plus BPA achieved respectively a statistically significant 1.8-fold and 3.3-fold increase in targeting homogeneity over BPA. The combined boron compound administration protocol contributes to homogeneous targeting of heterogeneous tumors and would increase therapeutic efficacy of BNCT by exposing all tumor populations to neutron capture reactions in boron. (author)

  19. The Aggregation of Boron on the Tissues of Gold Fish (Carassius auratus Linnaeus, 1758

    Directory of Open Access Journals (Sweden)

    Tuncer Okan Genç

    2015-03-01

    Full Text Available In this study, it was aimed to determine the water-borne and food-borne boron accumulation in the liver and muscle tissues of Gold Fish (Carassius auratus Linnaeus, 1758. For each treatment, 12 individuals were. The water-borne boron treatments were applied as boron acid concentration of 1 mg/L, 10 mg/L and 20 mg/L in the aquarium water, while the food-borne boron treatments were prepared food contained the defined levels of boron (1 mg/kg, 5 mg/kg and 10 mg/kg as boric acid. The boron levels in the tissues were determined by an ICP-MS procedure. The maximum boron concentration was found in the 20mg/L water borne boron treatment in the liver tissue (1.78±0.02 mg/kg. In the water-borne boron treatments, the maximum Transfer Factor (TF was found in the 20mg/L boron concentration, and TF values were increased when the boron concentrations were decreasing. In the 1 mg/kg food-borne boron treatment, TF was found as 0, and increasing concentration of boron in the food caused an increase in TF reached about 0.06. This study suggested that the target organ for boron accumulation is the liver rather than the muscles and the accumulation of food-borne boron is lower when comparing water-borne boron.

  20. Boron stress response and accumulation potential of the extremely tolerant species Puccinellia frigida

    International Nuclear Information System (INIS)

    Rámila, Consuelo d.P.; Contreras, Samuel A.; Di Domenico, Camila; Molina-Montenegro, Marco A.; Vega, Andrea; Handford, Michael; Bonilla, Carlos A.

    2016-01-01

    Highlights: • P. frigida presents an extremely high boron toxicity threshold. • Restricting uptake and internal tolerance mechanisms could confer boron tolerance. • P. frigida is a boron hyperaccumulator over a wide range of concentrations. • The species has potential for phytoremediation purposes. - Abstract: Phytoremediation is a promising technology to tackle boron toxicity, which restricts agricultural activities in many arid and semi-arid areas. Puccinellia frigida is a perennial grass that was reported to hyperaccumulate boron in extremely boron-contaminated sites. To further investigate its potential for phytoremediation, we determined its response to boron stress under controlled conditions (hydroponic culture). Also, as a first step towards understanding the mechanisms underlying its extreme tolerance, we evaluated the presence and expression of genes related with boron tolerance. We found that P. frigida grew normally even at highly toxic boron concentrations in the medium (500 mg/L), and within its tissues (>5000 mg/kg DW). We postulate that the strategies conferring this extreme tolerance involve both restricting boron accumulation and an internal tolerance mechanism; this is consistent with the identification of putative genes involved in both mechanisms, including the expression of a possible boron efflux transporter. We also found that P. frigida hyperaccumulated boron over a wide range of boron concentrations. We propose that P. frigida could be used for boron phytoremediation strategies in places with different soil characteristics and boron concentrations. Further studies should pave the way for the development of clean and low-cost solutions to boron toxicity problems.