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Sample records for dan fotokatalis titanium

  1. Imobilisasi TiO2 ke dalam Resin Penukar Kation dan Aplikasinya sebagai Fotokatalis dalam Proses Fotoreduksi Ion Hg2+

    Directory of Open Access Journals (Sweden)

    Rosyid Ridho

    2017-03-01

    Full Text Available Abstrak Dalam rangka mengembangkan bahan fotokatalitis TiO2 pada penelitian ini telah dilakukan preparasi fotokatalis TiO2-Resin yang disertai dengan karakterisasi dan uji aktivitas untuk proses fotoreduksi ion Hg(II. Preparasi imobilisasi ini dilakukan dengan metode pertukaran ion yang di ikuti dengan kalsinasi pada suhu tertentu. Pada preparasi telah dipelajari pengaruh konsentrasi Titanium Isopropoksida sebagai sumber ion Ti(IV terhadap TiO2-Resin yang dikarakterisasi dengan menggunakan Difraksi Sinar X (XRD dan Thermografimetri (TGA. Pada proses fotoreduksi ion Hg(II dipelajari pengaruh massa fotokatalis, kadar TiO2 yang terimobilisasi ke dalam resin, konsentrasi Ion Hg(II, dan pengaruh pH. Proses fotoreduksi dilakukan dalam suatu reaktor tertutup yang dilengkapi dengan lampu UV, yaitu dengan cara menyinari campuran yang terdiri dari larutan ion Hg(II dan serbuk fotokatalis TiO2-Resin, disertai dengan pengadukan selama waktu tertentu. Hasil fotoreduksi dihitung berdasarkan selisih antara konsentrasi ion Hg(II awal dengan ion Hg(II yang tak tereduksi. Penentuan konsentrasi ion Hg(II yang tak tereduksi dilakukan dengan menggunakan Spektrofotometer Serapan Atom (SSA teknik pembangkitan uap dingin atau Cold Vapor Atomic Absorption Spectrophotometry(CV-AAS. Hasil preparasi menunjukkan semakin tinggi konsentrasi Titanium Isopropoksida yang ditambahkan pada resin semakin tinggi juga kadar TiO2 yang terbentuk pada TiO2-Resin. Hasil uji fotokatalis menunjukkan bahwa penggunaan fotokatalis TiO¬2-Resin dapat meningkatkan hasil fotoreduksi ion Hg(II yang peningkatannya lebih tinggi dibandingkan TiO2 serbuk. Penambahan fotokatalis dengan massa yang semakin besar menambah efektivitas fotoreduksi terhadap ion Hg(II yang semakin besar, namun jika ditambahkan massa fotokatalis yang lebih tinggi lagi akan menurunkan efektivitas fotoreduksi terhadap ion Hg(II. Kenaikan konsentrasi Hg(II menyebabkan efektivitas fotoreduksi semakin rendah. Pada pH 1-4 terjadi

  2. FOTODEGRADASI ZAT WARNA TARTRAZIN LIMBAH CAIR INDUSTRI MIE MENGGUNAKAN FOTOKATALIS TiO2 - SINAR MATAHARI

    Directory of Open Access Journals (Sweden)

    Dian Windy Dwiasi

    2014-05-01

    Full Text Available Salah satu dampak negatif perkembangan industri mie di Indonesia adalah timbulnya pencemaran lingkungan dari limbah cair industri mie yang masih mengandung zat organik seperti zat warna tartrazin. Penurunan kadar zat warna tartrazin dalam limbah cair mie dapat diupayakan dengan cara mendegradasi zat warna tartrazin melalui proses fotodegradasi dengan metode fotokatalis. Pada penelitian ini telah dilakukan fotodegradasi zat warna tartrazin dalam limbah cair mie menggunakan fotokatalis TiO2. Perlakuan meliputi pengaruh variasi waktu kontak dan pH terhadap aktivitas fotokatalis TiO2 menggunakan sinar UV dan sinar matahari. Hasil penelitian menunjukkan bahwa aktivitas fotokatalitik yang terbaik untuk TiO2 adalah pada kondisi limbah cair mie dengan pH 2, dan waktu kontak 1 jam. Persentase penurunan kadar tartrazin dengan menggunakan lampu UV adalah sebesar 56,81%, sedangkan dengan penyinaran sinar matahari sebesar 61,64 %.

  3. Karakteristik kawat TMA (titanium molybdenum alloy) dan penggunaannya dalam perawatan ortodonti

    OpenAIRE

    Arifiani, Putri; Erwin Siregar, Erwin Siregar

    2016-01-01

    Kawat merupakan salah satu piranti yang penting dalam perawatan ortodonsia. Perkembangan terkini dari kawat ortodonsia menghasilkan beberapa jenis kawat dengan karakteristik yang berbeda-beda. Studi pustaka membahas karakteristik kawat ortodonsi beta titanium atau Titanium Molybdenum Alloy (TMA) dan penggunaannya dalam perawatan ortodonsi. Perbedaan karakteristik tiap kawat menjadi hal yang perlu dipertimbangkan secara klinis. Kawat beta titanium atau sering disebut juga dengan kawat TMA (Tit...

  4. PENGUJIAN AKTIVITAS KOMPOSIT Fe2O3-SiO2 SEBAGAI FOTOKATALIS PADA FOTODEGRADASI 4-KLOROFENOL (The Activity Test of Fe2O3-SiO2 Composite As Photocatalyst on 4-Chlorophenol Photodegradation

    Directory of Open Access Journals (Sweden)

    Eko Sri Kunarti

    2009-03-01

    Full Text Available ABSTRAK  Pada penelitian ini telah dilakukan pengujian aktivitas komposit Fe2O3-SiO2 sebagai fotokatalis pada fotodegradasi 4-klorofenol. Penelitian diawali dengan preparasi dan karakterisasi fotokatalis Fe2O3-SiO2. Preparasi dilakukan dengan metode sol-gel pada temperatur kamar menggunakan tetraetil ortosilikat (TEOS dan besi (III nitrat sebagai prekursor diikuti dengan perlakuan termal pada temperature 500 oC. Karakterisasi dilakukan dengan metode spektrometri inframerah, difraksi sinar-X dan spektrometri fluoresensi sinar-X. Uji aktivitas komposit untuk fotodegradasi 4-klorofenol dilakukan dalam reaktor tertutup yang dilengkapi dengan lampu UV. Pada uji ini telah dipelajari pengaruh waktu penyinaran dan pH larutan terhadap efektivitas fotodegradasi 4-klorofenol. Hasil penelitian menunjukkan bahwa komposit Fe2O3-SiO2 dapat dipreparasi dengan metode sol-gel pada temperatur kamar diikuti perlakuan termal. Komposit Fe2O3-SiO2 dapat meningkatkan efektivitas fotodegradasi 4-klorofenol dari 11,86 % menjadi 55,38 %. Efektivitas fotodegradasi 4- klorofenol dipengaruhi waktu penyinaran dan pH larutan yang semakin lama waktu penyinaran efektifitas fotodegradasi semakin tinggi, namun waktu penyinaran yang lebih lama dari 4 jam dapat menurunkan efektivitasnya. pH larutan memberikan pengaruh yang berbeda-beda pada efektivitas fotodegradasi 4-klorofenol.   ABSTRACT The activity test of Fe2O3-SiO2 composite as photocatalyst on 4-chlorophenol photodegradation has been studied. The research was initiated by preparation of Fe2O3-SiO2 photocatalyst and followed by characterization. The preparation was conducted by sol-gel method at room temperature using tetraethylorthosilicate (TEOS and iron (III nitrate as precursors followed by thermal treatment at a temperature of 500oC. The characterizations were performed by X-ray Diffraction (XRD, Infrared and X-ray Fluorescence Spectrophotometry. The photocatalytic activity test of composites for 4 chlorophenol

  5. Titanium

    Science.gov (United States)

    Woodruff, Laurel G.; Bedinger, George M.; Piatak, Nadine M.; Schulz, Klaus J.; DeYoung,, John H.; Seal, Robert R.; Bradley, Dwight C.

    2017-12-19

    Titanium is a mineral commodity that is essential to the smooth functioning of modern industrial economies. Most of the titanium produced is refined into titanium dioxide, which has a high refractive index and is thus able to impart a durable white color to paint, paper, plastic, rubber, and wallboard. Because of their high strength-to-weight ratio and corrosion resistance, titanium metal and titanium metal alloys are used in the aerospace industry as well as for welding rod coatings, biological implants, and consumer goods.Ilmenite and rutile are currently the principal titanium-bearing ore minerals, although other minerals, including anatase, perovskite, and titanomagnetite, could have economic importance in the future. Ilmenite is currently being mined from two large magmatic deposits hosted in rocks of Proterozoic-age anorthosite plutonic suites. Most rutile and nearly one-half of the ilmenite produced are from heavy-mineral alluvial, fluvial, and eolian deposits. Titanium-bearing minerals occur in diverse geologic settings, but many of the known deposits are currently subeconomic for titanium because of complications related to the mineralogy or because of the presence of trace contaminants that can compromise the pigment production process.Global production of titanium minerals is currently dominated by Australia, Canada, Norway, and South Africa; additional amounts are produced in Brazil, India, Madagascar, Mozambique, Sierra Leone, and Sri Lanka. The United States accounts for about 4 percent of the total world production of titanium minerals and is heavily dependent on imports of titanium mineral concentrates to meet its domestic needs.Titanium occurs only in silicate or oxide minerals and never in sulfide minerals. Environmental considerations for titanium mining are related to waste rock disposal and the impact of trace constituents on water quality. Because titanium is generally inert in the environment, human health risks from titanium and titanium

  6. 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 ...

  7. Titanium

    DEFF Research Database (Denmark)

    Fage, Simon W; Muris, Joris; Jakobsen, Stig S

    2016-01-01

    Exposure to titanium (Ti) from implants and from personal care products as nanoparticles (NPs) is common. This article reviews exposure sources, ion release, skin penetration, allergenic effects, and diagnostic possibilities. We conclude that human exposure to Ti mainly derives from dental...... and medical implants, personal care products, and foods. Despite being considered to be highly biocompatible relative to other metals, Ti is released in the presence of biological fluids and tissue, especially under certain circumstances, which seem to be more likely with regard to dental implants. Although...... most of the studies reviewed have important limitations, Ti seems not to penetrate a competent skin barrier, either as pure Ti, alloy, or as Ti oxide NPs. However, there are some indications of Ti penetration through the oral mucosa. We conclude that patch testing with the available Ti preparations...

  8. Titanium ; dream new material

    International Nuclear Information System (INIS)

    Lee, Yong Tae; Kim Seung Eon; Heoon, Yong Taek; Jung, Hui Won

    2001-11-01

    The contents of this book are history of Titanium, present situation of Titanium industry, property of Titanium alloy, types of it, development of new alloy of Titanium smelting of Titanium, cast of Titanium and heat treatment of Titanium, Titanium alloy for plane, car parts, biological health care, and sport leisure and daily life, prospect, and Titanium industrial development of Titanium in China.

  9. Opportunities in the electrowinning of molten titanium from titanium dioxide

    CSIR Research Space (South Africa)

    Van Vuuren, DS

    2005-10-01

    Full Text Available used, the following forms of titanium are produced: titanium sponge, sintered electrode sponge, powder, molten titanium, electroplated titanium, hydride powder, and vapor-phase depos- ited titanium. Comparing the economics of alter- native...-up for producing titanium via the Kroll process is approximately as follows: ilmenite ($0.27/kg titanium sponge); titanium slag ($0.75/kg titanium sponge); TiCl4 ($3.09/kg titanium sponge); titanium sponge raw materials costs ($5.50/kg titanium sponge); total...

  10. Titanium and titanium alloys: fundamentals and applications

    National Research Council Canada - National Science Library

    Leyens, C; Peters, M

    2003-01-01

    ... number of titanium alloys have paved the way for light metals to vastly expand into many industrial applications. Titanium and its alloys stand out primarily due to their high specific strength and excellent corrosion resistance, at just half the weight of steels and Ni-based superalloys. This explains their early success in the aerospace and the...

  11. Sealing glasses for titanium and titanium alloys

    Science.gov (United States)

    Brow, Richard K.; McCollister, Howard L.; Phifer, Carol C.; Day, Delbert E.

    1997-01-01

    Barium lanthanoborate sealing-glass compositions are provided comprising various combinations (in terms of mole-%) of boron oxide (B.sub.2 O.sub.3), barium oxide (BaO), lanthanum oxide (La.sub.2 O.sub.3), and at least one other oxide selected from the group consisting of aluminum oxide (Al.sub.2 O.sub.3), calcium oxide (CaO), lithium oxide (Li.sub.2 O), sodium oxide (Na.sub.2 O), silicon dioxide (SiO.sub.2), or titanium dioxide (TiO.sub.2). These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys having an improved aqueous durability and favorable sealing characteristics. Examples of the sealing-glass compositions are provided having coefficients of thermal expansion about that of titanium or titanium alloys, and with sealing temperatures less than about 900.degree. C., and generally about 700.degree.-800.degree. C. The barium lanthanoborate sealing-glass compositions are useful for components and devices requiring prolonged exposure to moisture or water, and for implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps).

  12. Classification of titanium dioxide

    International Nuclear Information System (INIS)

    Macias B, L.R.; Garcia C, R.M.; Maya M, M.E.; Ita T, A. De; Palacios G, J.

    2002-01-01

    In this work the X-ray diffraction (XRD), Scanning Electron Microscopy (Sem) and the X-ray Dispersive Energy Spectroscopy techniques are used with the purpose to achieve a complete identification of phases and mixture of phases of a crystalline material as titanium dioxide. The problem for solving consists of being able to distinguish a sample of titanium dioxide being different than a titanium dioxide pigment. A standard sample of titanium dioxide with NIST certificate is used, which indicates a purity of 99.74% for the TiO 2 . The following way is recommended to proceed: a)To make an analysis by means of X-ray diffraction technique to the sample of titanium dioxide pigment and on the standard of titanium dioxide waiting not find differences. b) To make a chemical analysis by the X-ray Dispersive Energy Spectroscopy via in a microscope, taking advantage of the high vacuum since it is oxygen which is analysed and if it is concluded that the aluminium oxide appears in a greater proportion to 1% it is established that is a titanium dioxide pigment, but if it is lesser then it will be only titanium dioxide. This type of analysis is an application of the nuclear techniques useful for the tariff classification of merchandise which is considered as of difficult recognition. (Author)

  13. Oxidation and Reduction of Iron-Titanium Oxides in Chemical Looping Combustion: A Phase-Chemical Description Oxydation et réduction des minerais de fer-titane dans la combustion en boucle chimique

    Directory of Open Access Journals (Sweden)

    den Hoed P.

    2011-05-01

    Full Text Available Ilmenite (FeTiO3 is being explored as an oxygen carrier in chemical looping processes. Its reduction and oxidation are described by the system Fe-Fe2O3-TiO2-Ti2O3. The phase diagram at 1 000°C, presented here, offers a useful tool for predicting reactions and their products. We see that Fe2TiO5 (pseudobrookite and TiO2 (rutile form a stable phase assemblage following the oxidation of FeTiO3 (ilmenite in air. The subsequent reduction of Fe2TiO5 at oxygen partial pressures of 10-15.5atm stabilizes Fe1.02Ti0.98O3, a solid solution of ilmenite. Further reduction will produce metallic iron, which compromises the integrity of the oxygen carrier for chemical looping processes. We speculate that the reduction of Fe-Ti oxides in several practical instances does not reach completion (and equilibrium under the imposed atmospheres operating in fuel reactors. L’ilménite (FeTiO3 est considéré comme un transporteur d’oxygène potentiel pour les procédés en boucle chimique. Ses mécanismes de réduction et d’oxydation sont décrits à travers le système Fe-Fe2O3-TiO2-TiO3. Le diagramme de phase à 1 000°C, présenté ici, est un outil utile pour prédire les réactions et les produits. Nous constatons que Fe2TiO5 (pseudobrookite et TiO2 (rutile forment un assemblage de phase stable après oxydation de l’ilménite (FeTiO3 dans l’air. La réduction subséquente de Fe2TiO5 à la pression partielle de 10−15,5atm stabilise vers Fe1.02Ti0.98O3, une solution solide d’ilménite. Une réduction plus poussée va produire du fer métallique et compromettre l’intégrité du transporteur d’oxygène dans la boucle chimique. Il est probable que la réduction des oxydes Fe-Ti ne soit pas, en pratique, complète et n’atteigne pas l’équilibre dans les conditions rencontrées en opération dans les réacteurs de réduction.

  14. Electrowinning molten titanium from titanium dioxide

    CSIR Research Space (South Africa)

    Van Vuuren, DS

    2005-10-01

    Full Text Available the Manufacturing and Materials Industry in it quest for global competitiveness CSIR Manufacturing and Materials Technology 3 Rationale – Titanium Cost Build-up Material Cost Ilmenite $0.27/kg Ti sponge Titanium slag $0.75/kg Ti Sponge TiCl4 and TiO2 $3....10/kg Ti Sponge Ti Sponge raw materials costs $5.50/kg Ti Sponge Total Ti Sponge cost $9-$11/kg Ti Sponge Ti ingot $15-17/kg Ti Aluminium $1.7/kg Al Supporting the Manufacturing and Materials Industry in its quest for global competitivenessorting...

  15. Chitosan patterning on titanium alloys

    OpenAIRE

    Gilabert Chirivella, Eduardo; Pérez Feito, Ricardo; Ribeiro, Clarisse; Ribeiro, Sylvie; Correia, Daniela; González Martin, María Luisa; Manero Planella, José María; Lanceros Méndez, Senentxu; Gallego Ferrer, Gloria; Gómez Ribelles, José Luis

    2017-01-01

    Titanium and its alloys are widely used in medical implants because of their excellent properties. However, bacterial infection is a frequent cause of titanium-based implant failure and also compromises its osseointegration. In this study, we report a new simple method of providing titanium surfaces with antibacterial properties by alternating antibacterial chitosan domains with titanium domains in the micrometric scale. Surface microgrooves were etched on pure titanium disks at i...

  16. Production of titanium tetrachloride

    International Nuclear Information System (INIS)

    Perillo, P.M.; Botbol, O.

    1990-01-01

    This report presents a summary of results from theoperation of a laboratory scale for the production in batches of approximately 100 gs of titanium tetrachloride by chlorination with chloroform and carbon tetrachloride between 340 deg C and 540 deg C. Chlorination agent vapors were passed through a quartz column reacting with titanium oxide powder agglomerated in little spheres. Obtained titanium tetrachloride was condensed in a condenser, taken in a ballon and then purified by fractional distillation. Optimun temperature for chloroform was 400 deg C with 74 % yield and for carbon tetrachloride was 500 deg C with 69 % yield. (Author) [es

  17. Electroplating on titanium alloy

    Science.gov (United States)

    Lowery, J. R.

    1971-01-01

    Activation process forms adherent electrodeposits of copper, nickel, and chromium on titanium alloy. Good adhesion of electroplated deposits is obtained by using acetic-hydrofluoric acid anodic activation process.

  18. Titanium oxide fever

    International Nuclear Information System (INIS)

    De Jonge, D.; Visser, J.

    2012-01-01

    One measure to improve air quality is to apply photo-catalytic substances that capture NOx onto the road surface or onto baffle boards alongside the roads. The effect of titanium oxide containing clinkers with coating was discussed in the report 'Demonstration project of air-purifying pavement in Hengelo, The Netherlands' that was published in May 2011. This article examines the way in which the effectiveness of this study was determined. Can titanium oxide containing clinkers and coatings indeed capture NOx?. [nl

  19. Machining of titanium alloys

    CERN Document Server

    2014-01-01

    This book presents a collection of examples illustrating the resent research advances in the machining of titanium alloys. These materials have excellent strength and fracture toughness as well as low density and good corrosion resistance; however, machinability is still poor due to their low thermal conductivity and high chemical reactivity with cutting tool materials. This book presents solutions to enhance machinability in titanium-based alloys and serves as a useful reference to professionals and researchers in aerospace, automotive and biomedical fields.

  20. Titanium by design: TRIP titanium alloy

    Science.gov (United States)

    Tran, Jamie

    Motivated by the prospect of lower cost Ti production processes, new directions in Ti alloy design were explored for naval and automotive applications. Building on the experience of the Steel Research Group at Northwestern University, an analogous design process was taken with titanium. As a new project, essential kinetic databases and models were developed for the design process and used to create a prototype design. Diffusion kinetic models were developed to predict the change in phase compositions and microstructure during heat treatment. Combining a mobility database created in this research with a licensed thermodynamic database, ThermoCalc and DICTRA software was used to model kinetic compositional changes in titanium alloys. Experimental diffusion couples were created and compared to DICTRA simulations to refine mobility parameters in the titanium mobility database. The software and database were able to predict homogenization times and the beta→alpha plate thickening kinetics during cooling in the near-alpha Ti5111 alloy. The results of these models were compared to LEAP microanalysis and found to be in reasonable agreement. Powder metallurgy was explored using SPS at GM R&D to reduce the cost of titanium alloys. Fully dense Ti5111 alloys were produced and achieved similar microstructures to wrought Ti5111. High levels of oxygen in these alloys increased the strength while reducing the ductility. Preliminary Ti5111+Y alloys were created, where yttrium additions successfully gettered excess oxygen to create oxides. However, undesirable large oxides formed, indicating more research is needed into the homogeneous distribution of the yttrium powder to create finer oxides. Principles established in steels were used to optimize the beta phase transformation stability for martensite transformation toughening in titanium alloys. The Olson-Cohen kinetic model is calibrated to shear strains in titanium. A frictional work database is established for common alloying

  1. Titanium metal: extraction to application

    Energy Technology Data Exchange (ETDEWEB)

    Gambogi, Joseph (USGS, Reston, VA); Gerdemann, Stephen J.

    2002-09-01

    In 1998, approximately 57,000 tons of titanium metal was consumed in the form of mill products (1). Only about 5% of the 4 million tons of titanium minerals consumed each year is used to produce titanium metal, with the remainder primarily used to produce titanium dioxide pigment. Titanium metal production is primarily based on the direct chlorination of rutile to produce titanium tetrachloride, which is then reduced to metal using the Kroll magnesium reduction process. The use of titanium is tied to its high strength-to-weight ratio and corrosion resistance. Aerospace is the largest application for titanium. In this paper, we discuss all aspects of the titanium industry from ore deposits through extraction to present and future applications. The methods of both primary (mining of ore, extraction, and purification) and secondary (forming and machining) operations will be analyzed. The chemical and physical properties of titanium metal will be briefly examined. Present and future applications for titanium will be discussed. Finally, the economics of titanium metal production also are analyzed as well as the advantages and disadvantages of various alternative extraction methods.

  2. Industrial experience with titanium

    International Nuclear Information System (INIS)

    Ikeda, B.M.; Shoesmith, D.W.

    1997-09-01

    Titanium is a reference material for the construction of waste containers in the Canadian Nuclear Fuel Waste Management Program. It has been in industrial service for over 30 a, often in severe corrosion environments, but it is still considered a relatively exotic material with limited operating history. This has arisen because of the aerospace applications of this material and the misconception that the high strength-to-weight ratio dominates the choice of this material. In fact, the advantage of titanium lies in its high reliability and excellent corrosion resistance. It has a proven record in seawater heat exchanger service and a demonstrated excellent reliability even in polluted water. For many reasons it is the technically correct choice of material for marine applications. In this report we review the industrial service history of titanium, particularly in hot saline environments, and demonstrate that it is a viable waste container material, based upon this industrial service history and operating experience. (author)

  3. Surface modification of titanium and titanium alloys by ion implantation.

    Science.gov (United States)

    Rautray, Tapash R; Narayanan, R; Kwon, Tae-Yub; Kim, Kyo-Han

    2010-05-01

    Titanium and titanium alloys are widely used in biomedical devices and components, especially as hard tissue replacements as well as in cardiac and cardiovascular applications, because of their desirable properties, such as relatively low modulus, good fatigue strength, formability, machinability, corrosion resistance, and biocompatibility. However, titanium and its alloys cannot meet all of the clinical requirements. Therefore, to improve the biological, chemical, and mechanical properties, surface modification is often performed. In view of this, the current review casts new light on surface modification of titanium and titanium alloys by ion beam implantation. (c) 2010 Wiley Periodicals, Inc.

  4. Thermogravimetric experiments with titanium

    International Nuclear Information System (INIS)

    Porter, L.J.; Longhurst, G.R.

    1991-02-01

    In the process of preparing for pyrophoricity experiments involving uranium, we conducted hydriding and air-exposure experiments on titanium. In these experiments the hydriding reactions and response to air-exposure was generally within the range expected based on work reported by others. One aberrant behavior was a sudden weight gain followed by a significant weight loss. We speculate that loss may be due to hydrogen evolution from the TiH 2 resulting from local heating by oxidation reactions. We verified that titanium is not pyrophoric at temperatures less than 750 degree C. 18 refs. 1 fig

  5. Titanium and zirconium alloys

    International Nuclear Information System (INIS)

    Pinard Legry, G.

    1994-01-01

    Titanium and zirconium pure and base alloys are protected by an oxide film with anionic vacancies which gives a very good resistance to corrosion in oxidizing medium, in some ph ranges. Results of pitting and crevice corrosion are given for Cl - , Br - , I - ions concentration with temperature and ph dependence, also with oxygenated ions effect. (A.B.). 32 refs., 6 figs., 3 tabs

  6. Cytotoxicity difference of 316L stainless steel and titanium reconstruction plate

    Directory of Open Access Journals (Sweden)

    Ni Putu Mira Sumarta

    2011-03-01

    .33% after 48 hours. And after exposure to titanium reconstruction plate, the percentage of living fibroblast was 98.69% after 24 hours and 82.24% after 48 hours. Based on cytotoxicity parameter (CD50%, both reconstruction plate made of 316L stainless steel or titanium showed as a non-toxic materials to fibroblast. Conclusion: Both reconstruction plate made of stainless steel and CP titanium were non-toxic to fibroblast, although the stainless steel plate showed lower cytotoxicity level compared to titanium. Therefore a reconstruction plate made from stainless steel type 316L can be used as a safe material for mandibular reconstruction. Latar belakang: Titanium murni adalah bahan yang paling biokompatibel saat ini dan digunakan sebagai standar emas implan logam. Saat ini stainless steel masih digunakan karena kekuatan, ductility, harganya yang murah, tahan terhadap korosi dan cukup biokompatibel. Tujuan: Penelitian ini dilakukan untuk mengetahui perbedaan sitotoksisitas antara plat rekonstruksi yang terbuat dari titanium murni komersial dan plat rekonstruksi yang terbuat dari stainless steel pada kultur sel fibroblas baby hamster kidney-21 (BHK-21 menggunakan MTT assay. Metode: Delapan sampel yang masing-masing tipe 316L terbuat dari stainless steel 316L grade 2 (Coen’s reconstruction plate® yang dipotong berbentuk silinder diameter 2 mm dan panjang 3 mm, serta yang terbuat dari titanium murni komersial (STEMA Gmbh® diameter 2 mm dan panjang 2,2 mm; dan dibersihkan dengan kertas silika dan pembersih ultrasonik serta disterilkan dengan autoclave pada suhu 121° C selama 20 menit. Kedua sampel dimasukkan ke dalam sumur mikroplat yang mengandung 50 μl sel fibroblas dengan kepadatan 2 × 105 dalam media Rosewell Park Memorial Institute-1640 (RPMI-1640, diputar dengan kecepatan 30 rpm selama 5 menit. Sumur mikroplat diinkubasi selama 24 dan 48 jam pada suhu 37° C. Setelah 24 "> jam, pada tiap sumur yang akan dibaca pada jam ke 24 ditambahkan 50 μl cairan yang mengandung 5

  7. Mechanochemistry of titanium oxides

    Directory of Open Access Journals (Sweden)

    Veljković Ivana

    2009-01-01

    Full Text Available Mechanochemistry represents an alternative route in synthesis of nanomaterials. Mechanochemical routes are attractive because of their simplicity, flexibility, and ability to prepare materials by solid state reactions at room temperature. The aim of this work is the mechanochemical synthesis of nanostructured titanium oxides of different composition starting from mixtures of Ti and TiO2, TiO and TiO2 or Ti2O3 and TiO2. Emphasis is on the Magneli phases Ti4O7 and Ti5O9 because their mixture is commercially known as EBONEX material. The materials prepared were characterized by XRPD, TG/DTA analysis, SEM and optical microscopy. Titanium monoxide and several Magneli oxides, Ti4O7, Ti5O9 and Ti6O11, are successfully prepared. The results are very interesting because the EBONEX materials were prepared at lower than usual temperature, which would decrease the effective cost of production.

  8. Industrial experience with titanium

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, B M; Shoesmith, D W

    1997-09-01

    Titanium is a reference material for the construction of waste containers in the Canadian Nuclear Fuel Waste Management Program. It has been in industrial service for over 30 a, often in severe corrosion environments, but it is still considered a relatively exotic material with limited operating history. This has arisen because of the aerospace applications of this material and the misconception that the high strength-to-weight ratio dominates the choice of this material. In fact, the advantage of titanium lies in its high reliability and excellent corrosion resistance. It has a proven record in seawater heat exchanger service and a demonstrated excellent reliability even in polluted water. For many reasons it is the technically correct choice of material for marine applications. In this report we review the industrial service history of titanium, particularly in hot saline environments, and demonstrate that it is a viable waste container material, based upon this industrial service history and operating experience. (author) 83 refs., 17 tabs., 3 figs.

  9. Advances in titanium alloys

    International Nuclear Information System (INIS)

    Seagle, S.R.; Wood, J.R.

    1993-01-01

    As described above, new developments in the aerospace market are focusing on higher temperature alloys for jet engine components and higher strength/toughness alloys for airframe applications. Conventional alloys for engines have reached their maximum useful temperature of about 1000 F (540 C) because of oxidation resistance requirements. IMI 834 and Ti-1100 advanced alloys show some improvement, however, the major improvement appears to be in gamma titanium aluminides which could extend the maximum usage temperature to about 1500 F (815 C). This puts titanium alloys in a competitive position to replace nickel-base superalloys. Advanced airframe alloys such as Ti-6-22-22S, Beta C TM , Ti-15-333 and Ti-10-2-3 with higher strength than conventional Ti-6-4 are being utilized in significantly greater quantities, both in military and commercial applications. These alloys offer improved strength with little or no sacrifice in toughness and improved formability, in some cases. Advanced industrial alloys are being developed for improved corrosion resistance in more reducing and higher temperature environments such as those encountered in sour gas wells. Efforts are focused on small precious metal additions to optimize corrosion performance for specific applications at a modest increase in cost. As these applications develop, the usage of titanium alloys for industrial markets should steadily increase to approach that for aerospace applications. (orig.)

  10. Titanium fasteners. [for aircraft industry

    Science.gov (United States)

    Phillips, J. L.

    1972-01-01

    Titanium fasteners are used in large quantities throughout the aircraft industry. Most of this usage is in aluminum structure; where titanium structure exists, titanium fasteners are logically used as well. Titanium fasteners offer potential weight savings to the designer at a cost of approximately $30 per pound of weight saved. Proper and least cost usage must take into consideration type of fastener per application, galvanic couples and installation characteristics of protective coatings, cosmetic appearance, paint adhesion, installation forces and methods available and fatigue performance required.

  11. Joining of Gamma Titanium Aluminides

    National Research Council Canada - National Science Library

    Baeslack, William

    2002-01-01

    .... Although organized and presented by joining process, many of the observations made and relationships developed, particularly those regarding the weldability and welding metallurgy of gamma titanium...

  12. Meet EPA's Dan Nelson

    Science.gov (United States)

    EPA’s Dan Nelson is the Director of the Human Research Protocol Office at the National Health and Environmental Effect Research Laboratory, Dan works to protect the rights and welfare of EPA’s research participants.

  13. Bahasa, Simbol, dan Religi

    OpenAIRE

    Supriyadi, Supriyadi

    1999-01-01

    Manusia sering disebut sebagai makhluk sosial, makhluk berakal, makhluk berseni, dan sebagainya. Tulisan ini secara tidak langsung membicarakan manusia sebagai makhluk berbahasa, bersimbol, dan bereligi . Meskipun demikian, titik tolaknya bukan pada manusia itu sendiri, tetapi pada bahasa, simbol, dan religinya, terutama pada hubungan di antara ketiganya . Hubungan antara bahasa dan simbol tidak diragukan lagi karena bahasa merupakan jenis simbol . Demikian juga hubungan antara simbol dengan ...

  14. Chemical changes of titanium and titanium dioxide under electron bombardment

    Directory of Open Access Journals (Sweden)

    Romins Brasca

    2007-09-01

    Full Text Available The electron induced effect on the first stages of the titanium (Ti0 oxidation and titanium dioxide (Ti4+ chemical reduction processes has been studied by means of Auger electron spectroscopy. Using factor analysis we found that both processes are characterized by the appearance of an intermediate Ti oxidation state, Ti2O3 (Ti3+.

  15. Plasmonic Titanium Nitride Nanostructures via Nitridation of Nanopatterned Titanium Dioxide

    DEFF Research Database (Denmark)

    Guler, Urcan; Zemlyanov, Dmitry; Kim, Jongbum

    2017-01-01

    Plasmonic titanium nitride nanostructures are obtained via nitridation of titanium dioxide. Nanoparticles acquired a cubic shape with sharper edges following the rock-salt crystalline structure of TiN. Lattice constant of the resulting TiN nanoparticles matched well with the tabulated data. Energy...

  16. Physical metallurgy of titanium alloys

    International Nuclear Information System (INIS)

    Collings, E.W.

    1988-01-01

    Researches in electric, magnetic, thermophysical properties of titanium alloys in the wide range of temperatures (from helium upto elevated one), as well as stability of phases in alloys of different types are generalized. Fundamental description of physical properties of binary model alloys is given. Acoustic emission, shape memory and Bauschinger effects, pseudoelasticity, aging and other aspects of physical metallurgy of titanium alloys are considered

  17. Titanium for salt water service

    International Nuclear Information System (INIS)

    Gadiyar, H.S.; Shibad, P.R.

    1980-01-01

    Titanium has potential as major material of construction in desalination plants, in condensers and heat exchangers, in view of its excellent corrosion resistance to salt water upto at least 120deg C. The advantages of titanium in such applications are brought out. The various specific problems such as pitting, crevice and galvanic corrosion and the preventive methods, for adopting titanium have been discussed. The hydriding problem can be overcome by suitably controlling the operating parameters such as temperature and surface preparation. A case has been made to prove the economic viability of titanium in comparison to Al-brass and Cu-Ni alloy. The future of titanium seems to be very promising in view of the negligible tube failures and outages. (auth.)

  18. Analisis Kebijakan dan Efektivitas Organisasi

    Directory of Open Access Journals (Sweden)

    Amir Syarifudin Kiwang

    2015-05-01

    Full Text Available Penerapan Peraturan Gubernur Nusa Tenggara Timur Nomor 8 Tahun 2011 tentang Organisasi dan Tata Kerja Unit Pelaksana Teknis Pendidikan dan Pelatihan Koperasi dan Usaha Mikro Kecil dan Menengah pada Dinas Koperasi dan Usaha Mikro Kecil dan Menengah Provinsi Nusa Tenggara Timur adalah dalam rangka untuk meningkatkan efektivitas kerja organisasi pada UPT Diklat Koperasi dan UMKM. Penelitian ini berusaha untuk melihat dampak kebijakan organisasi terhadap efektivitas organisasi dengan menggunakan enam elemen variabel dari kebijakan dan praktik manajemen. Keenam elemen tersebut adalah penetapan tujuan strategis, pencarian dan pemanfaatan sumber daya, lingkungan prestasi, proses komunikasi, kepemimpinan dan pengambilan keputusan, serta adaptasi dan inovasi organisasi. Penelitian kualitatif ini menggunakan pendekatan studi kasus. Teknik analisis data yang digunakan adalah analisis data model Miles dan Huberman, yang terdiri atas reduksi data, display/penyajian data, dan kesimpulan/verifikasi. Hasil penelitian menunjukkan bahwa efektivitas organisasi pada UPT Diklat koperasi dan UMKM belum berjalan secara baik, hal ini dapat dilihat dari beberapa hal antara lain, belum adanya tenaga spesialisasi pengelola diklat dan tenaga khusus (sarjana di bidang perkoperasian dan kondisi lingkungan kerja (lingkungan prestasi pada UPT Diklat koperasi dan UMKM yang belum efektif. Penempatan pegawai juga belum tepat, mutasi ke UPT Diklat Koperasi dan UMKM tidak memperhatikan latar belakang pendidikan dan spesialisasi/keahlian pegawai sehingga membutuhkan waktu dalam proses penyesuaian serta menurunkan jumlah pelaksanaan diklat dikarenakan keterbatasan alokasi dana.

  19. Preparation of titanium diboride powders from titanium alkoxide and ...

    Indian Academy of Sciences (India)

    Administrator

    Department of Materials and Manufacturing Process, Malek Ashtar University of Technology, Tehran. 15875-1744, Iran ... Titanium diboride is a hard refractory material with a high melting point ... (λ = 1⋅540598 Å) radiation. Morphology of the ...

  20. TANGKI SEPTIK DAN MASALAHNYA

    Directory of Open Access Journals (Sweden)

    Sri Soewasti Soesanto

    2012-10-01

    Full Text Available Manusia yang sehat tiap hari membuang tinja yang harus ditampung dan/atau diolah secara saniter. Meskipun Indonesia telah 55 tahun merdeka dan telah memiliki banyak ahli sanitasi/teknik penyehatan baik lulusan dalam maupun luar negeri, namun cara pengelolaan tinja yang ada kebanyakan masih belum memenuhi syarat kesehatan. Tangki septik dianggap sebagai cara penampungan tinja yang terbaik, padahal sebenarnya masih terjadi pencemaran tanah dan air melalui saluran perembesan.Tangki septik (septic tank merupakan salah satu macam sarana pengolahan tinja manusia yang pada garis besarnya terdiri dari sebuah tangki pembusukan lumpur (sludge digester dan saluran perembesan efluen. Tangki pembusukan harus memenuhi syarat mengenai perbandingan panjang dan lebar serta syarat kedalaman maksimum dan minimum, agar pembusukan lumpur dari tinja manusia dapat berjalan sempurna malahan tidak berbau busuk lagi.

  1. Hydrogen in titanium alloys

    International Nuclear Information System (INIS)

    Wille, G.W.; Davis, J.W.

    1981-04-01

    The titanium alloys that offer properties worthy of consideration for fusion reactors are Ti-6Al-4V, Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-5Al-6Sn-2Zr-1Mo-Si (Ti-5621S). The Ti-6242S and Ti-5621S are being considered because of their high creep resistance at elevated temperatures of 500 0 C. Also, irradiation tests on these alloys have shown irradiation creep properties comparable to 20% cold worked 316 stainless steel. These alloys would be susceptible to slow strain rate embrittlement if sufficient hydrogen concentrations are obtained. Concentrations greater than 250 to 500 wppm hydrogen and temperatures lower than 100 to 150 0 C are approximate threshold conditions for detrimental effects on tensile properties. Indications are that at the elevated temperature - low hydrogen pressure conditions of the reactors, there would be negligible hydrogen embrittlement

  2. DEPRESI DAN GANGGUAN TIDUR

    Directory of Open Access Journals (Sweden)

    Wayan Eko Radityo

    2012-12-01

    Full Text Available Depresi merupakan gangguan mood berupa kesedihan yang intens, berlangsung dalamwaktu lama, dan mengganggu kehidupan normal yang insidennya semakin meningkatseiring dengan meningkatnya tekanan hidup. Tahun 2020, depresi diperkirakanmenempati urutan kedua penyakit di dunia. Gejala-gejala depresi terdiri dari gangguanemosi, gangguan kognitif, keluhan somatik, gangguan psikomotor, dan gangguanvegetatif. Salah satu gejala depresi yang muncul adalah gangguan tidur yang bisaberupa insomnia, bangun secara tiba-tiba, dan hipersomnia. Hal ini disebabkan olehgangguan neurotransmiter dan regulasi hormon. Selain sebagai gejala depresi, gangguantidur juga bisa merupakan penyebab depresi. Beberapa penelitian memberikanhubungan gangguan tidur dapat meningkatkan risiko depresi di kemudian hari.

  3. Thermomechanical treatment of titanium alloys

    International Nuclear Information System (INIS)

    Khorev, A.K.

    1979-01-01

    The problems of the theory and practical application of thermomechanical treatment of titanium alloys are presented. On the basis of the systematic investigations developed are the methods of thermomechanical treatment of titanium alloys, established are the optimum procedures and produced are the bases of their industrial application with an account of alloy technological peculiarities and the procedure efficiency. It is found that those strengthening methods are more efficient at which the contribution of dispersion hardening prevails over the strengthening by phase hardening

  4. Keragaman dan Peran Biologi Arthrophoda pada Sawah Irigasi dan Tegalan

    OpenAIRE

    Suwarno, Suwarno

    2016-01-01

    Penelitian ini bertujuan untuk mengetahui keragaman arthropoda dan peran biologinya pada tanah sawah irigasi dan tegalan. Penelitian ini dilaksanakan di daerah persawahan di daerah Sragen pada bulan Maret – Mei 2016. Metode Penelitian dengan menggunakan pitfall trap atau perangkap jebakan yang diletakkan area persawahan dan tegalan. Teknik pengumpulan data dengan menggunakan purposive sampling. Sampel arthropoda yang diperoleh diidentifikasi dan dianalisis di Laboratorium pendidikan Biologi. ...

  5. Titanium nanostructures for biomedical applications

    International Nuclear Information System (INIS)

    Kulkarni, M; Gongadze, E; Perutkova, Š; A Iglič; Mazare, A; Schmuki, P; Kralj-Iglič, V; Milošev, I; Mozetič, M

    2015-01-01

    Titanium and titanium alloys exhibit a unique combination of strength and biocompatibility, which enables their use in medical applications and accounts for their extensive use as implant materials in the last 50 years. Currently, a large amount of research is being carried out in order to determine the optimal surface topography for use in bioapplications, and thus the emphasis is on nanotechnology for biomedical applications. It was recently shown that titanium implants with rough surface topography and free energy increase osteoblast adhesion, maturation and subsequent bone formation. Furthermore, the adhesion of different cell lines to the surface of titanium implants is influenced by the surface characteristics of titanium; namely topography, charge distribution and chemistry. The present review article focuses on the specific nanotopography of titanium, i.e. titanium dioxide (TiO 2 ) nanotubes, using a simple electrochemical anodisation method of the metallic substrate and other processes such as the hydrothermal or sol-gel template. One key advantage of using TiO 2 nanotubes in cell interactions is based on the fact that TiO 2 nanotube morphology is correlated with cell adhesion, spreading, growth and differentiation of mesenchymal stem cells, which were shown to be maximally induced on smaller diameter nanotubes (15 nm), but hindered on larger diameter (100 nm) tubes, leading to cell death and apoptosis. Research has supported the significance of nanotopography (TiO 2 nanotube diameter) in cell adhesion and cell growth, and suggests that the mechanics of focal adhesion formation are similar among different cell types. As such, the present review will focus on perhaps the most spectacular and surprising one-dimensional structures and their unique biomedical applications for increased osseointegration, protein interaction and antibacterial properties. (topical review)

  6. Titanium nanostructures for biomedical applications

    Science.gov (United States)

    Kulkarni, M.; Mazare, A.; Gongadze, E.; Perutkova, Š.; Kralj-Iglič, V.; Milošev, I.; Schmuki, P.; Iglič, A.; Mozetič, M.

    2015-02-01

    Titanium and titanium alloys exhibit a unique combination of strength and biocompatibility, which enables their use in medical applications and accounts for their extensive use as implant materials in the last 50 years. Currently, a large amount of research is being carried out in order to determine the optimal surface topography for use in bioapplications, and thus the emphasis is on nanotechnology for biomedical applications. It was recently shown that titanium implants with rough surface topography and free energy increase osteoblast adhesion, maturation and subsequent bone formation. Furthermore, the adhesion of different cell lines to the surface of titanium implants is influenced by the surface characteristics of titanium; namely topography, charge distribution and chemistry. The present review article focuses on the specific nanotopography of titanium, i.e. titanium dioxide (TiO2) nanotubes, using a simple electrochemical anodisation method of the metallic substrate and other processes such as the hydrothermal or sol-gel template. One key advantage of using TiO2 nanotubes in cell interactions is based on the fact that TiO2 nanotube morphology is correlated with cell adhesion, spreading, growth and differentiation of mesenchymal stem cells, which were shown to be maximally induced on smaller diameter nanotubes (15 nm), but hindered on larger diameter (100 nm) tubes, leading to cell death and apoptosis. Research has supported the significance of nanotopography (TiO2 nanotube diameter) in cell adhesion and cell growth, and suggests that the mechanics of focal adhesion formation are similar among different cell types. As such, the present review will focus on perhaps the most spectacular and surprising one-dimensional structures and their unique biomedical applications for increased osseointegration, protein interaction and antibacterial properties.

  7. 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...

  8. 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...

  9. Titanium pigmentation. An electron probe microanalysis study

    International Nuclear Information System (INIS)

    Dupre, A.; Touron, P.; Daste, J.; Lassere, J.; Bonafe, J.L.; Viraben, R.

    1985-01-01

    A patient had an unusual pigmentary disease induced by titanium dioxide. The use of a topical cream containing titanium dioxide caused a xanthomalike appearance on the patient's penis. Electron probe microanalysis was valuable in establishing the cause of this balanitis

  10. Printing of Titanium implant prototype

    International Nuclear Information System (INIS)

    Wiria, Florencia Edith; Shyan, John Yong Ming; Lim, Poon Nian; Wen, Francis Goh Chung; Yeo, Jin Fei; Cao, Tong

    2010-01-01

    Dental implant plays an important role as a conduit of force and stress to flow from the tooth to the related bone. In the load sharing between an implant and its related bone, the amount of stress carried by each of them directly related to their stiffness or modulus. Hence, it is a crucial issue for the implant to have matching mechanical properties, in particular modulus, between the implant and its related bone. Titanium is a metallic material that has good biocompatibility and corrosion resistance. Whilst the modulus of the bulk material is still higher than that of bone, it is the lowest among all other commonly used metallic implant materials, such as stainless steel or cobalt alloy. Hence it is potential to further reduce the modulus of pure Titanium by engineering its processing method to obtain porous structure. In this project, porous Titanium implant prototype is fabricated using 3-dimensional printing. This technique allows the flexibility of design customization, which is beneficial for implant fabrication as tailoring of implant size and shape helps to ensure the implant would fit nicely to the patient. The fabricated Titanium prototype had a modulus of 4.8-13.2 GPa, which is in the range of natural bone modulus. The compressive strength achieved was between 167 to 455 MPa. Subsequent cell culture study indicated that the porous Titanium prototype had good biocompatibility and is suitable for bone cell attachment and proliferation.

  11. Anodic growth of titanium dioxide nanostructures

    DEFF Research Database (Denmark)

    2010-01-01

    Disclosed is a method of producing nanostructures of titanium dioxide (TiO 2 ) by anodisation of titanium (Ti) in an electrochemical cell, comprising the steps of: immersing a non-conducting substrate coated with a layer of titanium, defined as the anode, in an electrolyte solution...... an electrical contact to the layer of titanium on the anode, where the electrical contact is made in the electrolyte solution...

  12. Uranium fluorides analysis. Titanium spectrophotometric determination

    International Nuclear Information System (INIS)

    Anon.

    Titanium determination in uranium hexafluoride in the range 0.7 to 100 microgrammes after transformation of uranium fluoride in sulfate. Titanium is separated by extraction with N-benzoylphenylhydroxylamine, reextracted by hydrochloric-hydrofluoric acid. The complex titanium-N-benzoylphenylhydroxylamine is extracted by chloroform. Spectrophotometric determination at 400 nm [fr

  13. 21 CFR 73.1575 - Titanium dioxide.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 1 2010-04-01 2010-04-01 false Titanium dioxide. 73.1575 Section 73.1575 Food and... ADDITIVES EXEMPT FROM CERTIFICATION Drugs § 73.1575 Titanium dioxide. (a) Identity and specifications. (1) The color additive titanium dioxide shall conform in identity and specifications to the requirements...

  14. 40 CFR 180.1195 - Titanium dioxide.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 23 2010-07-01 2010-07-01 false Titanium dioxide. 180.1195 Section 180.1195 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS... Titanium dioxide. Titanium dioxide is exempted from the requirement of a tolerance for residues in or on...

  15. 21 CFR 73.2575 - Titanium dioxide.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 1 2010-04-01 2010-04-01 false Titanium dioxide. 73.2575 Section 73.2575 Food and... ADDITIVES EXEMPT FROM CERTIFICATION Cosmetics § 73.2575 Titanium dioxide. (a) Identity and specifications. The color additive titanium dioxide shall conform in identity and specifications to the requirements...

  16. 21 CFR 73.575 - Titanium dioxide.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 1 2010-04-01 2010-04-01 false Titanium dioxide. 73.575 Section 73.575 Food and... ADDITIVES EXEMPT FROM CERTIFICATION Foods § 73.575 Titanium dioxide. (a) Identity. (1) The color additive titanium dioxide is synthetically prepared TiO2, free from admixture with other substances. (2) Color...

  17. 21 CFR 73.3126 - Titanium dioxide.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 1 2010-04-01 2010-04-01 false Titanium dioxide. 73.3126 Section 73.3126 Food and... ADDITIVES EXEMPT FROM CERTIFICATION Medical Devices § 73.3126 Titanium dioxide. (a) Identity and specifications. The color additive titanium dioxide (CAS Reg. No. 13463-67-7), Color Index No. 77891, shall...

  18. Adaptive mesh refinement in titanium

    Energy Technology Data Exchange (ETDEWEB)

    Colella, Phillip; Wen, Tong

    2005-01-21

    In this paper, we evaluate Titanium's usability as a high-level parallel programming language through a case study, where we implement a subset of Chombo's functionality in Titanium. Chombo is a software package applying the Adaptive Mesh Refinement methodology to numerical Partial Differential Equations at the production level. In Chombo, the library approach is used to parallel programming (C++ and Fortran, with MPI), whereas Titanium is a Java dialect designed for high-performance scientific computing. The performance of our implementation is studied and compared with that of Chombo in solving Poisson's equation based on two grid configurations from a real application. Also provided are the counts of lines of code from both sides.

  19. The titanium oxide phi system

    Science.gov (United States)

    Galehouse, D. C.; Davis, S. P.

    1980-01-01

    The phy system of titanium oxide has been studied in emission in the near-infrared, with the Fourier transform spectrometer at a resolution of 8000,000. Approximately 3000 lines from 25 bands of this system have been identified, including all five 0-0 and 0-1 bands corresponding to the five natural titanium isotopes. Eleven vibrational levels have been observed, and all bands have been rotationally analyzed. Band intensities are agreement with known isotopic abundances and calculated Franck-Condon factors.

  20. Liever kraanwater dan bronwater

    NARCIS (Netherlands)

    Kole, A.P.W.

    2011-01-01

    Een test in het Restaurant van de Toekomst van de invloed van CO2-labels op het aankoopgedrag van consumenten, heeft nog geen duidelijk beeld opgeleverd. Wel pakten mensen vaker kraanwater dan bronwater.

  1. Dan Performer Mei Lanfang

    DEFF Research Database (Denmark)

    Risum, Janne

    2010-01-01

    The convention of performing female characters (dan characters) in Beijing opera, as practised by its most prominent male performer of female characters Mei Lanfang, and its and his cultural context and aesthetic aim...

  2. Advances in cost effective processing of titanium

    International Nuclear Information System (INIS)

    Nelson, O.E.

    1993-01-01

    Recently an industry expert pointed out that one of the greatest hindrances to the growth of titanium usage has been the low percentage of material usable in the final product. Due to the extensive processing, forming, and machining operations typically performed on titanium, yield losses are high. This is especially true in aerospace applications where most titanium is used. In engine components, the start to finish ratio, known as the buy to fly ratio, is often as high as 7 to 1. This can be illustrated by looking at the use of titanium in Pratt and Whitney engines. In the JT-8D-217 used on Boeing's 737-200, the titanium buyweight is 5,385 pounds, whereas the finished titanium, flyweight is just 758 pounds. This start to finish ratio is 7.1:1, giving titanium 17.0% of total engine weight. (orig.)

  3. Lactobacillusassisted synthesis of titanium nanoparticles

    Directory of Open Access Journals (Sweden)

    Jha Anal

    2007-01-01

    Full Text Available AbstractAn eco-friendlylactobacillussp. (microbe assisted synthesis of titanium nanoparticles is reported. The synthesis is performed at room temperature. X-ray and transmission electron microscopy analyses are performed to ascertain the formation of Ti nanoparticles. Individual nanoparticles as well as a number of aggregates almost spherical in shape having a size of 40–60 nm are found.

  4. On structural recrystallization in titanium

    International Nuclear Information System (INIS)

    Mirzaev, D.A.; Schastlivtsev, V.M.; Shtejnberg, M.M.; Ul'yanov, V.G.; AN SSSR, Sverdlovsk. Inst. Fiziki Metallov)

    1984-01-01

    The effect of preliminary superfast quenching on structural changes at inverse α→β transformation in titanium is studied. Cooling at rates more than 10 4 deg/s results in grain refining at succeeding annealing in β- and α- regions. The obtained effect is explained by additional phase transformation-induced hardening conditioned by decrease of the transformation point at superfast cooling

  5. Nanodispersed boriding of titanium alloy

    International Nuclear Information System (INIS)

    Kostyuk, K.O.; Kostyuk, V.O.

    2015-01-01

    The problem of improving the operational reliability of machines is becoming increasingly important due to the increased mechanical, thermal and other loads on the details. There are many surface hardening methods for machines parts which breakdown begins with surface corruption. The most promising methods are chemical-thermal treatment. The aim of this work is to study the impact of boriding on the structure and properties of titanium alloy. Materials and Methods: The material of this study is VT3-1 titanium alloy. The boriding were conducted using nanodispersed powder blend based on boric substances. It is established that boriding of paste compounds allows obtaining the surface hardness within 30 - 29 GPa and with declining to 27- 26 GPa in layer to the transition zone (with total thickness up to 110 μm) owing to changes of the layer phase composition where T 2 B, TiB, TiB 2 titanium borides are formed. The increasing of chemical-thermal treatment time from 15 minutes to 2 hours leads to thickening of the borated layer (30 - 110 μm) and transition zone (30 - 190 μm). Due to usage of nanodispersed boric powder, the boriding duration is decreasing in 2 - 3 times. This allows saving time and electric energy. The developed optimal mode of boriding the VT3-1 titanium alloy allows obtaining the required operational characteristics and to combine the saturation of the surface layer with atomic boron and hardening

  6. Cell Attachment Following Instrumentation with Titanium and Plastic Instruments, Diode Laser, and Titanium Brush on Titanium, Titanium-Zirconium, and Zirconia Surfaces.

    Science.gov (United States)

    Lang, Melissa S; Cerutis, D Roselyn; Miyamoto, Takanari; Nunn, Martha E

    2016-01-01

    The aim of this study was to evaluate the surface characteristics and gingival fibroblast adhesion of disks composed of implant and abutment materials following brief and repeated instrumentation with instruments commonly used in procedures for implant maintenance, stage-two implant surgery, and periimplantitis treatment. One hundred twenty disks (40 titanium, 40 titaniumzirconium, 40 zirconia) were grouped into treatment categories of instrumentation by plastic curette, titanium curette, diode microlaser, rotary titanium brush, and no treatment. Twenty strokes were applied to half of the disks in the plastic and titanium curette treatment categories, while half of the disks received 100 strokes each to simulate implant maintenance occurring on a repetitive basis. Following analysis of the disks by optical laser profilometry, disks were cultured with human gingival fibroblasts. Cell counts were conducted from scanning electron microscopy (SEM) images. Differences in surface roughness across all instruments tested for zirconia disks were negligible, while both titanium disks and titaniumzirconium disks showed large differences in surface roughness across the spectrum of instruments tested. The rotary titanium brush and the titanium curette yielded the greatest overall mean surface roughness, while the plastic curette yielded the lowest mean surface roughness. The greatest mean cell counts for each disk type were as follows: titanium disks with plastic curettes, titanium-zirconium disks with titanium curettes, and zirconia disks with the diode microlaser. Repeated instrumentation did not result in cumulative changes in surface roughness of implant materials made of titanium, titanium-zirconium, or zirconia. Instrumentation with plastic implant curettes on titanium and zirconia surfaces appeared to be more favorable than titanium implant curettes in terms of gingival fibroblast attachment on these surfaces.

  7. PREFERENSI PEMBIAYAAN USAHA MIKRO DAN KECIL : PERSPEKTIF GENDER DAN ENTREPRENEURABILITY

    Directory of Open Access Journals (Sweden)

    Khaira Amalia Fachrudin

    2013-06-01

    Full Text Available Preferensi pembiayaan dalam perusahaan besar lebih didasarkan pada karakteristik perusahaan tersebut.  Namun dalam usaha mikro dan kecil hal ini mungkin berbeda dan bergantung pada karakteristik pemiliknya seperti gender dan entrepreneurability.   Perbedaan gender mungkin juga membedakan entrepreneurability dan dukungan yang diterima.  Penelitian ini akan menguji apakah terdapat perbedaan preferensi pembiayaan berdasarkan gender, entrepreneurability berdasarkan gender dan berdasarkan preferensi pembiayaan, serta perbedaan dukungan berdasarkan gender.  Sampel dari usaha mikro dan kecil yang bergerak dalam bidang kuliner  diuji dengan uji beda Independent Sample t Test dan kemudian dengan Crosstabulation untuk lebih memperinci hasilnya.  Hasil uji menunjukkan bahwa tidak terdapat perbedaan yang signifikan preferensi pembiayaan berdasarkan gender dan berdasarkan  entrepreneurability, namun entrepreneurability berbeda signifikan berdasarkan gender dan juga ditemukan bahwa dukungan moral, tenaga, dan modal yang diterima pemilik usaha pria dan wanita tidak berbeda signifikan (p value lebih kecil dari 0.05.   Hasil ini menunjukkan bahwa terdapat kesetaraan gender dalam pembiayaan usaha dan entrepreneurability lebih tinggi pada pria.  Pria pemilik usaha juga mendapatkan dukungan tenaga kerja yang lebih banyak daripada wanita.  Dukungan tenaga ini adalah salah satu bentuk  financial bootstrapping karena dapat mengurangi pembiayaan usaha

  8. Analysis of titanium content in titanium tetrachloride solution

    Science.gov (United States)

    Bi, Xiaoguo; Dong, Yingnan; Li, Shanshan; Guan, Duojiao; Wang, Jianyu; Tang, Meiling

    2018-03-01

    Strontium titanate, barium titan and lead titanate are new type of functional ceramic materials with good prospect, and titanium tetrachloride is a commonly in the production such products. Which excellent electrochemical performance of ferroelectric tempreature coefficient effect.In this article, three methods are used to calibrate the samples of titanium tetrachloride solution by back titration method, replacement titration method and gravimetric analysis method. The results show that the back titration method has many good points, for example, relatively simple operation, easy to judgment the titration end point, better accuracy and precision of analytical results, the relative standard deviation not less than 0.2%. So, it is the ideal of conventional analysis methods in the mass production.

  9. DETEKSI DAN MANAJEMEN REFEEDING SYNDROME

    OpenAIRE

    Darmadi Darmadi; Riska Habriel Ruslie

    2012-01-01

    AbstrakRefeeding syndrome (RFS) dideskripsikan sebagai perubahan biokimiawi, manifestasi klinis dan komplikasi sebagai konsekuensi pemberian nutrisi pada pasien kurang gizi. Refeeding syndrome ini menyebabkan dampak buruk dan kematian. Sindroma ini lebih sering terjadi pada kelompok risiko. Refeeding syndrome merupakan suatu sindroma yang sering tak terdiagnosis oleh karena itu perlu peningkatan pengetahuan dan kesadaran dari tenaga medis untuk mengurangi morbiditas dan mortalitas dari RFS. K...

  10. INOVASI DAN STRATEGI PENCAPAIANNYA

    Directory of Open Access Journals (Sweden)

    Liem Ferryanto

    2009-01-01

    Full Text Available Innovation is the way of life of any institution to profitably sustain its life. It starts with empathy, the ability to reach outside of ourselves and walk in someone else’s shoes, and optimal implementation of the newly advanced technology. Innovation shows its results through continuously hard working efforts known as "10 Thousand Hours Rule". As world uncertainty creates complexity we, instead of predicting, should therefore anticipate the future by creating and managing real options on contingent projects or elements of alternative optimal strategies. This should reflect into our portfolio strategy. Abstract in Bahasa Indonesia: Inovasi merupakan darah bagi suatu institusi untuk bisa hidup berkelanjutan serta menguntungkan. Inovasi berupa penemuan baru secara sistematis yang berawal dari empati, kemampuan untuk melihat dunia melalui mata orang lain, dan pemanfaatan secara optimal kemajuan teknologi yang ada. Inovasi baru menghasilkan buahnya melalui kerja keras, yaitu dengan mengikuti “Aturan 10 Ribu Jam” secara berkesinambungan. Ketidakpastian, interaksi, keterbatasan dan degradasi menciptakan kompleksitas tentang kebutuhan dan solusi di masa depan. Oleh sebab itu daripada meramalkan risiko yang bakal terjadi, kita sebaiknya memasang strategi berupa skenario untuk mereduksi akibat dari risiko masa depan yang tidak kita mengerti. Skenario ini dapat diperoleh lewat penciptaan dan penanganan beberapa pilihan nyata atas semua proyek antisipatif yang ada. Kata kunci: Inovasi, ketidakpastian dan kompleksitas, aturan 10 ribu jam, paradoks strategi, peta jalan, empati, kerja berkesinambungan.

  11. PENGELOLAAN PENELITIAN DAN PENGEMBANGAN KESEHATAN DI THAILAND, MYANMAR, DAN INDIA

    Directory of Open Access Journals (Sweden)

    Anorital, SKM Anorital, SKM

    2012-09-01

    Full Text Available Dalam bulan Januari 1991 yang lalu, Sdr. Anorital, SKM (Ka. Subbag. Pengumpulan dan PengolahanData Badan Litbangkes dan H. Syafwani Mirin, SKM (Ka. Bag. Keuangan Badan Litbangkes memperoleh fellowship dari WHO untuk melakukan studi perbandingan ke institusi-institusi penelitian kesehatan di Thailand,Myanmar, dan India.Berikut di bawah ini tulisan bersangkutan yang menggambarkan secara garis besar pengelolaan penelitian dan pengembangan kesehatan pada masing-masing negara obyek studi. Semoga informasi yang terkandung pada tulisan ini dapat bermanfaat bagi pengembangan Badan Penelitian dan Pengembangan Kesehatan.

  12. Titanium gettering in Doublet III

    International Nuclear Information System (INIS)

    de Grassie, J.S.; Callis, R.; Campbell, G.

    1980-08-01

    The application of mild titanium gettering in the Doublet III tokamak has led to a significant improvement in the obtainable operating regimes and discharge parameters for all of the many plasma cross-sectional shapes studied. With gettering, low-Z impurities and radiated power are greatly reduced. The maximum line averaged electron density has increased 50% (anti n/sub e max/ approx. 1 x 10 20 /m 3 ), corresponding to a Murakami coefficient of nearly 6

  13. Analogy and differences between aluminium and titanium electrowinning

    CSIR Research Space (South Africa)

    Van Vuuren, DS

    2006-09-01

    Full Text Available larger market. The authors have tested this route experimentally, but could not produce pure titanium. The failure of electrowinning pure, molten titanium has been interpreted in terms of the analogy and differences between aluminium and titanium...

  14. Research and Development on Titanium Alloys

    Science.gov (United States)

    1949-10-31

    information concerning the runs made * * In order to check the general operation of the train and furnace, a number of qualitative runs were made. These runs... General Technique. * . . * * . 109 The Analysis of Titanium . . . . ... ... 112 Notes and Comments, . . . .. . .. . . . 113 The Results from Vacuum...described in this report are as follows: 1. Arc ielting Titanium-Base Alloys. 2. Evaluation of Experimental Titanium-Base Alloys. 3. Investigation of

  15. Titanium metal obtention by fused salts electrolysis

    International Nuclear Information System (INIS)

    Perillo, P.M.; Ares, Osvaldo; Botbol, Jose.

    1989-01-01

    Potassium fluorotitanate dissolved in fused sodium chloride or potassium chloride may be electrolyzed under an inert gas atmosphere. Solid electrolysis products are formed on the cathode which contains titanium metal, sodium chloride, lower fluorotitanates and small quantities of alkali metal fluorotitanate. The extraction of titanium from the electrolysis products may be carried out by aqueous leaching (removal of chloride salts of alkali metals and a certain amount of fluorotitanates). Titanium metal obtained is relatively pure. (Author)

  16. Production of titanium from ilmenite: a review

    Energy Technology Data Exchange (ETDEWEB)

    Kohli, R.

    1981-12-01

    The general principles for beneficiation of titanium ores are reviewed and the specific processes used in individual units in various countries are discussed. This is followed by a critical evaluation of various current and potential reduction methods for the production of titanium metal from the processed concentrates. Finally, the report outlines a research program for the development of a commercially viable alternative method for the production of titanium metal.

  17. Strength and structure of nanocrystalline titanium

    International Nuclear Information System (INIS)

    Noskova, N.I.; Pereturina, I.A.; Elkina, O.A.; Stolyarov, V.V.

    2004-01-01

    Investigation results on strength and plasticity of nanocrystalline titanium VT-1 are presented. Specific features of plastic deformation on tension of this material specimens in an electron microscope column are studied in situ. It is shown that nanocrystalline titanium strength and plasticity at room temperature are dependent on the structure and nanograin size. It is revealed that deformation processes in nanocrystalline titanium are characterized by activation of deformation rotational modes and microtwinning [ru

  18. Cranioplasty with individual titanium implants

    Science.gov (United States)

    Mishinov, S.; Stupak, V.; Sadovoy, M.; Mamonova, E.; Koporushko, N.; Larkin, V.; Novokshonov, A.; Dolzhenko, D.; Panchenko, A.; Desyatykh, I.; Krasovsky, I.

    2017-09-01

    Cranioplasty is the second procedure in the history of neurosurgery after trepanation, and it is still relevant despite the development of civilization and progress in medicine. Each cranioplasty operation is unique because there are no two patients with identical defects of the skull bones. The development of Direct Metal Laser Sintering (DMLS) technique opened up the possibility of direct implant printing of titanium, a biocompatible metal used in medicine. This eliminates the need for producing any intermediate products to create the desired implant. We have produced 8 patient-specific titanium implants using this technique for patients who underwent different decompressive cranioectomies associated with bone tumors. Follow-up duration ranged from 6 to 12 months. We observed no implant-related reactions or complications. In all cases of reconstructive neurosurgery we achieved good clinical and aesthetic results. The analysis of the literature and our own experience in three-dimensional modeling, prototyping, and printing suggests that direct laser sintering of titanium is the optimal method to produce biocompatible surgical implants.

  19. Machinability evaluation of titanium alloys.

    Science.gov (United States)

    Kikuchi, Masafumi; Okuno, Osamu

    2004-03-01

    In the present study, the machinability of titanium, Ti-6Al-4V, Ti-6A1-7Nb, and free-cutting brass was evaluated using a milling machine. The metals were slotted with square end mills under four cutting conditions. The cutting force and the rotational speed of the spindle were measured. The cutting forces for Ti-6Al-4V and Ti-6Al-7Nb were higher and that for brass was lower than that for titanium. The rotational speed of the spindle was barely affected by cutting. The cross sections of the Ti-6Al-4V and Ti-6Al-7Nb chips were more clearly serrated than those of titanium, which is an indication of difficult-to-cut metals. There was no marked difference in the surface roughness of the cut surfaces among the metals. Cutting force and the appearance of the metal chips were found to be useful as indices of machinability and will aid in the development of new alloys for dental CAD/CAM and the selection of suitable machining conditions.

  20. Titanium Matrix Composite Pressure Vessel, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — For over 15 years, FMW Composite Systems has developed Metal Matrix Composite manufacturing methodologies for fabricating silicon-carbide-fiber-reinforced titanium...

  1. Appcelerator Titanium patterns and best practices

    CERN Document Server

    Pollentine, Boydlee

    2013-01-01

    The book takes a step-by-step approach to help you understand CommonJS and Titanium architecture patterns, with easy to follow samples and plenty of in-depth explanations If you're an existing Titanium developer or perhaps a new developer looking to start off your Titanium applications "the right way", then this book is for you. With easy to follow examples and a full step-by-step account of architecting a sample application using CommonJS and MVC, along with chapters on new features such as ACS, you'll be implementing enterprise grade Titanium solutions in no time. You should have some JavaSc

  2. Criterion of titanium aviation alloy application

    International Nuclear Information System (INIS)

    Stasyunas, O.P.

    1976-01-01

    The most significant statistic mechanical characteristics are presented of titanium as compared with those of aluminium and steel. Based on these data one can draw conclusions as to the advantages and disadvantages of titanium. High chemical activity and diffusivity of titanium place limitations on the use of its alloys. Despite the promising features of a needle-like structure, specifications still keep relying on a globular structure, which is explained by the easeiness of the production. Titanium is expensive, sometimes its cost may by a factor of 20 exceed that of other aviation materials

  3. Titanium. Properties, raw datum surface, physicochemical basis and fabrication technique

    International Nuclear Information System (INIS)

    Garmata, V.A.; Petrun'ko, A.N.; Galitskij, N.V.; Olesov, Yu.G.; Sandler, R.A.

    1983-01-01

    On the nowadays science and technology achievements the complex of titanium metallurgy problems comprising raw material base, physico-chemical basis and fabrication technique, properties and titanium usage fields is considered for the first time. A particular attention is given to raw material base, manufacturing titanium concentrates and titanium tetrachloride, metallothermal reduction, improvement of metal quality. Data on titanium properties are given, processes of titanium powder metallurgy, scrap and waste processing, problems of economics and complex raw material use are considered

  4. Kinerja Dan Efisiensi Bank Pemerintah (Bumn) Dan Busn Yang Go Publik Di Indonesia

    OpenAIRE

    Haryanto, Sugeng

    2012-01-01

    Penelitian ini menganalisis kinerja dan tingkat efisiensi bank-bank BUMN dan BUSN yang go Publik di Bursa Efek Indonesia. Sample penelitian ini mengambil tiga bank BUMN Bank BNI 46, Bank Mandiri dan Bank BRI) dan tiga bank BUSN (Bank BCA, Bank Niaga dan Bank Panin) dengan periode analisis tahun 2005-2011. Varibael yang digunakan meliputi ROA, ROE, LAR. LDR, NPL dan BOPO. Tujuan dari penelitian ini adalah melihat dan menganalisis perbedaan kinerja antara Bank BUMN dan BUSN yang go public di...

  5. Kondisi oral higiene dan karies gigi pada vegetarian dan non vegetarian di Maha Vihara Maitreya Medan

    OpenAIRE

    Prawira, Albert

    2011-01-01

    Perbedaan pola makan antara vegetarian dan non vegetarian dapat mempengaruhi kesehatan gigi dan mulut. Tujuan penelitian adalah untuk mengetahui kondisi oral higiene dan karies gigi pada umat vegetarian dan non vegetarian di Maha Vihara Maitreya Medan. Jenis penelitian adalah survei deskriptif. Sampel terdiri atas 74 vegetarian dan 65 non vegetarian. Pemeriksaan oral higiene dan karies gigi masing-masing menggunakan indeks OHIS Greene dan Vermillion dan indeks DMFT Klein, se...

  6. The vapour phase deposition of boron on titanium by the reaction between gaseous boron trichloride and titanium metal. Final report

    International Nuclear Information System (INIS)

    Cameron, D.J.; Shelton, R.A.J.

    1965-03-01

    The reaction, between boron trichloride vapour and titanium has been investigated in the temperature range 200 - 1350 deg. C. It has been found that an initial reaction leads to the formation of titanium tetrachloride and the deposition of boron on titanium, but that except for reactions between 900 and 1000 deg. C, the system is complicated by the formation of lower titanium chlorides due to secondary reactions between the titanium and titanium tetrachloride

  7. IDE DAN DESAIN

    Directory of Open Access Journals (Sweden)

    Priscilia Yunita Wijaya

    1999-01-01

    Full Text Available We have seen many desain all around our everyday living. Design exist in the form of brochures%2C posters%2C banners%2C signages%2C book covers%2C and etcetera. Some are nice and easy to understand%2C some are ok%2C and some look like they are not fully develop and thought. A word that run across our mind whrn we enjoying a design is idea . A good design almost always associated with a good idea%2C is it tru? This paper is going to discuss about desain and its relationship to idea. Abstract in Bahasa Indonesia : Banyak desain yang diamati dalam kehidupan kita sehari-hari. Desain hadir dalam bentuk brosur%2C poster%2C spanduk%2C tanda-tanda%2C sampul buku%2C dan lain sebagainya. Ada beberapa yang bagus dan mudah untuk dimengerti%2C beberapa yang biasa%2C dan beberapa yang tampak asal dibuat. Sebuah kata yang terlintas dalam pemikiran kita dalam menikmati sebuah desain adalah ide . Sebuah desain yang baik selalu di identikan dengan ide yang baik%2C benarkah hal ini? Apakah desain dan apa hubungannya dengan ide akan dibahas pada tulisan ini.

  8. Low temperature study of nonstoichiometric titanium carbide

    International Nuclear Information System (INIS)

    Tashmetov, M.Yu.

    2005-05-01

    By low temperature neutron diffraction method was studied structure in nonstoichiometric titanium carbide from room temperature up to 12K. It is found of low temperature phase in titanium carbide- TiC 0.71 . It is established region and borders of this phase. It is determined change of unit cell parameter. (author)

  9. Casting of Titanium and its Alloys

    OpenAIRE

    R. L. Saha; K. T. Jacob

    1986-01-01

    Titaniuni and its alloys have many applications in aerospace, marine and other engineering industries. Titanium requires special melting techniques because of its high reactivity at elevated temperatures and needs special mould materials and methods for castings. This paper reviews the development of titanium casting technology.

  10. Appcelerator Titanium business application development cookbook

    CERN Document Server

    Bahrenberg, Benjamin

    2013-01-01

    Presented in easy to follow, step by step recipes, this guide is designed to lead you through the most important aspects of application design.Titanium developers who already have a basic knowledge of working with Appcelerator Titanium but want to further develop their knowledge for use with business applications

  11. Mineral resource of the month: titanium

    Science.gov (United States)

    Gambogi, Joseph

    2011-01-01

    Titanium is hip - at least when it comes to airplanes and jewelry. Known for its high strength-to weight ratio and its resistance to corrosion, titanium and its alloys can also be found in everything from knee replacements to eyeglass frames to baseball bats to fighter planes.

  12. Thermoexpanded graphite modification by titanium dioxide

    International Nuclear Information System (INIS)

    Semko, L.S.; Gorbik, P.P.; Chujko, O.O.; Kruchek, Ya.Yi.; Dzyubenko, L.S.; Orans'ka, O.Yi.

    2006-01-01

    A method of the synthesis of thermoexpanded graphite (TEG) powders coated by titanium dioxide is developed. The conversion of n-buthylorthotitanate into TiO 2 on the TEG surface is investigated. The optimal parameters of the synthesis and the structure of titanium dioxide clusters on the TEG surface are determined

  13. Titanium dioxide nanomaterials for photocatalysis

    International Nuclear Information System (INIS)

    Liu, Yan; Li, Zhe; Green, Michael; Just, Michael; Chen, Xiaobo; Li, Yang Yang

    2017-01-01

    Titanium dioxide (TiO 2 ) has been long regarded as one of the more promising photocatalysts to remove environmental pollution and to generate hydrogen from water under sunlight irradiation via photocatalysis. TiO 2 is environmentally benign and thus is considered a ‘green’ catalyst. In this review we present a short introduction to the physical and electronic properties of TiO 2 , its photocatalytic mechanisms, and some recent examples of various TiO 2 materials used for photocatalysis; these examples include 0, 1, 2, 3D, faceted, defected, composited, and hydrogenated TiO 2 materials. (topical review)

  14. Welding and Joining of Titanium Aluminides

    Science.gov (United States)

    Cao, Jian; Qi, Junlei; Song, Xiaoguo; Feng, Jicai

    2014-01-01

    Welding and joining of titanium aluminides is the key to making them more attractive in industrial fields. The purpose of this review is to provide a comprehensive overview of recent progress in welding and joining of titanium aluminides, as well as to introduce current research and application. The possible methods available for titanium aluminides involve brazing, diffusion bonding, fusion welding, friction welding and reactive joining. Of the numerous methods, solid-state diffusion bonding and vacuum brazing have been most heavily investigated for producing reliable joints. The current state of understanding and development of every welding and joining method for titanium aluminides is addressed respectively. The focus is on the fundamental understanding of microstructure characteristics and processing–microstructure–property relationships in the welding and joining of titanium aluminides to themselves and to other materials. PMID:28788113

  15. Welding and Joining of Titanium Aluminides

    Directory of Open Access Journals (Sweden)

    Jian Cao

    2014-06-01

    Full Text Available Welding and joining of titanium aluminides is the key to making them more attractive in industrial fields. The purpose of this review is to provide a comprehensive overview of recent progress in welding and joining of titanium aluminides, as well as to introduce current research and application. The possible methods available for titanium aluminides involve brazing, diffusion bonding, fusion welding, friction welding and reactive joining. Of the numerous methods, solid-state diffusion bonding and vacuum brazing have been most heavily investigated for producing reliable joints. The current state of understanding and development of every welding and joining method for titanium aluminides is addressed respectively. The focus is on the fundamental understanding of microstructure characteristics and processing–microstructure–property relationships in the welding and joining of titanium aluminides to themselves and to other materials.

  16. URGENSI DAN PROSPEK PENGATURAN (IUS CONSTITUENDUM UU TENTANG CONTEMPT OF COURT UNTUK MENEGAKKAN MARTABAT DAN WIBAWA PERADILAN

    Directory of Open Access Journals (Sweden)

    Lilik Mulyadi

    2015-07-01

    Full Text Available UU Contempt of Court merupakan kebutuhan yang bersifat urgent, segera dan mendesak, sehingga perlu dilakukan kajian dan penelitian secara kritis, akademis dan bersifat komprehensif untuk menjaga keluhuran dan menegakkan martabat dan wibawa peradilan.

  17. Epistemologi dan Keterbatasan Teori Gravitasi

    Directory of Open Access Journals (Sweden)

    Erwin Erwin

    2017-08-01

    Full Text Available Peristiwa tentang kecenderungan jatuhnya benda-benda menuju pusat bumi dan keteraturan peredaran planet dan benda-benda langit lainnya dalam tata surya dahulu dianggap dua fenomena yang berbeda. Mekanika benda langit dan mekanika bumi yang sebelumnya merupakan dua pengetahuan yang terpisah, dianggap satu kesatuan oleh Sir Isaac Newton. Newton mengemukakan hukum gravitasi umum yaitu gaya tarik menarik antara dua benda besarnya sebanding dengan massa masing-masing benda dan berbanding terbalik dengan kuadrat jarak antara kedua benda. Hukum gravitasi ini sukses menjalaskan bagaimana benda cendrung jatuh menuju pusat bumi dan peredaran planet dan benda-benda langit lain mengelilingi matahari dalam sistem tata surya. Namun hukum gravitasi Newton ternyata tidak sepenuhnya tepat, beberapa hal dapat dijelaskan dengan hukum relativitas Einstein, namun demikian hukum relativitas Einstein juga dicurigai masih perlu diamandemen agar dapat menjelaskan fenomena alam dengan tepat.

  18. EPISTEMOLOGI DAN KETERBATASAN TEORI GRAVITASI

    Directory of Open Access Journals (Sweden)

    Erwin Erwin

    2017-08-01

    Full Text Available Peristiwa tentang kecenderungan jatuhnya benda-benda menuju pusat bumi dan keteraturan peredaran planet dan benda-benda langit lainnya dalam tata surya dahulu dianggap dua fenomena yang berbeda. Mekanika benda langit dan mekanika bumi yang sebelumnya merupakan dua pengetahuan yang terpisah, dianggap satu kesatuan oleh Sir Isaac Newton. Newton mengemukakan hukum gravitasi umum yaitu gaya tarik menarik antara dua benda besarnya sebanding dengan massa masing-masing benda dan berbanding terbalik dengan kuadrat jarak antara kedua benda. Hukum gravitasi ini sukses menjalaskan bagaimana benda cendrung jatuh menuju pusat bumi dan peredaran planet dan benda-benda langit lain mengelilingi matahari dalam sistem tata surya. Namun hukum gravitasi Newton ternyata tidak sepenuhnya tepat, beberapa hal dapat dijelaskan dengan hukum relativitas Einstein, namun demikian hukum relativitas Einstein juga dicurigai masih perlu diamandemen agar dapat menjelaskan fenomena alam dengan tepat.

  19. ISLAM DAN RADIKALISME: Upaya Antisipasi dan Penanggulangannya

    Directory of Open Access Journals (Sweden)

    Idrus Ruslan

    2017-02-01

    Full Text Available Sejak tragedi pemboman WTC tanggal 11 September 2001 yang disusul dengan rangkaian peledakan bom di sejumlah negara, banyak orang non Muslim yang berasumsi bahwa ajaran Islam identik dengan radikalisme. Walaupun assumsi yang berkembang itu dapat dimaklumi, namun keyakinan tersebut tentu saja tidak sepenuhnya benar. Karena meskipun terdapat sekelompok orang Islam yang berbuat radikal, akan tetapi mayoritas Muslim justru bertentangan dengan mereka. Lagi pula, jika dicermati secara mendalam, sesungguhnya Islam sama sekali tidak mentolerir tindakan radikal. Ia adalah agama kasih sayang yang sangat mendodrong penganutnya untuk berbuat baik terhadap orang lain, termasuk kepada orang-orang non-Muslim. Artikel ini menawarkan beberapa upaya strategis dalam mengantisipasi dan menanggulangi bahaya radikalisme-terorisme.

  20. Titanium oxide fever; De titaniumoxidekoorts

    Energy Technology Data Exchange (ETDEWEB)

    De Jonge, D.; Visser, J. [Afdeling Luchtkwaliteit, GGD Amsterdam, Amsterdam (Netherlands)

    2012-02-15

    One measure to improve air quality is to apply photo-catalytic substances that capture NOx onto the road surface or onto baffle boards alongside the roads. The effect of titanium oxide containing clinkers with coating was discussed in the report 'Demonstration project of air-purifying pavement in Hengelo, The Netherlands' that was published in May 2011. This article examines the way in which the effectiveness of this study was determined. Can titanium oxide containing clinkers and coatings indeed capture NOx?. [Dutch] Een van de maatregelen om de luchtkwaliteit te verbeteren is het aanbrengen van fotokatalytische stoffen waarmee NOx kan worden afgevangen op bijvoorbeeld wegdek of op geluidsschermen langs wegen. Over het effect van titaniumoxidehoudende straatklinkers en hierop aangebrachte coatings verscheen in mei 2011 het rapport 'Demonstration project of air-purifying pavement in Hengelo, The Netherlands'. Dit artikel gaat over de manier waarop de effectiviteit in het hiervoor genoemde onderzoek is bepaald. Kunnen titaniumoxidehoudende klinkers en coatings inderdaad NOx afvangen?.

  1. Adsorption of hydrogen in titanium

    International Nuclear Information System (INIS)

    Martinez R, T.

    1995-01-01

    In this work the absorption of hydrogen in titanium plates using a constant volume system has been realized. The changes of temperature and pressure were used to monitor the progress of the absorption. A stainless steel vacuum chamber with volume of 4,333 cm 3 was used. A titanium sample of 45 x 5.4 x 0.3 cm was located in the center of the chamber. The sample was heated by an electrical source connected to the system. The sample was preconditioned with a vacuum-thermal treatment at 10 -6 mbar and 800 Centigrade degrees for several days. Absorption was observed at room temperature and also at higher temperatures. The room temperature absorption was in the pressure range of 1.0 x 10 3 to 2.5 x 10 3 mbar, and other absorptions were from 180 to 630 Centigrade degrees at 3.5 x 10 -1 to 1.3 x 10 3 mbar. It was found that the gas absorbed was function of the vacuum-thermal pre-conditioned treatment, pressure and temperature. When the first absorption was developed, additional absorptions were realized in short time. We measured the electrical resistivity of the sample in the experiments but we could not see important changes due to the absorption. (Author)

  2. Adhesive-Bonded Tab Attaches Thermocouples to Titanium

    Science.gov (United States)

    Cook, C. F.

    1982-01-01

    Mechanical strength of titanium-alloy structures that support thermocouples is preserved by first spotwelding thermocouples to titanium tabs and then attaching tabs to titanium with a thermosetting adhesive. In contrast to spot welding, a technique previously used for thermocouples, fatigue strength of the titanium is unaffected by adhesive bonding. Technique is also gentler than soldering or attaching thermocouples with a tap screw.

  3. DIVERSITAS DAN KERAPATAN MANGROVE, GASTROPODA DAN BIVALVIA DI ESTUARI PERANCAK, BALI

    OpenAIRE

    Susiana; Ali, Syamsu Alam; Rukminasari, Nita

    2011-01-01

    Penelitian ini bertujuan membandingkan diversitas dan kerapatan mangrove dengan kepadatan gastropoda dan bivalvia di mangrove alami dan rehabilitasi. Pengukuran ekosistem mangrove menggunakan transek kuadrat 10 m x 10 m. Kelimpahan dan kepadatan gastropoda dan bialvia menggunakan transek kuadrat berukuran 1 m x 1 m. Analisis nMDS, cluster untuk melihat hubungan karekteristik mangrove alami dan rehabilitasi dianalisis secara deskriptif dan analisis regresi untuk mendetermi...

  4. Mechanical properties and fracture of titanium hydrides

    International Nuclear Information System (INIS)

    Koketsu, Hideyuki; Taniyama, Yoshihiro; Yonezu, Akio; Cho, Hideo; Ogawa, Takeshi; Takemoto, Mikio; Nakayama, Gen

    2006-01-01

    Titanium hydrides tend to suffer fracture when their thicknesses reach a critical thickness. Morphology and mechanical property of the hydrides are, however, not well known. The study aims to reveal the hydride morphology and fracture types of the hydrides. Chevron shaped plate hydrides were found to be produced on the surface of pure titanium (Grade 1) and Grade 7 titanium absorbing hydrogen. There were tree types of fracture of the hydrides, i.e., crack in hydride layer, exfoliation of the layer and shear-type fracture of the hydride plates, during the growth of the hydrides and deformation. We next estimated the true stress-strain curves of the hydrides on Grade 1 and 7 titanium using the dual Vickers indentation method, and the critical strain causing the Mode-I fine crack by indentation. Fracture strength and strain of the hydrides in Grade 1 titanium were estimated as 566 MPa and 4.5%, respectively. Those of the hydride in Grade 7 titanium were 498 MPa and 16%. Though the fracture strains estimated from the plastic instability of true stress-strain curves were approximately the half of those estimated by finite element method, the titanium hydrides were estimated to possess some extent of toughness or plastic deformation capability. (author)

  5. Electron beam melting of sponge titanium

    International Nuclear Information System (INIS)

    Kanayama, Hiroshi; Kusamichi, Tatsuhiko; Muraoka, Tetsuhiro; Onouye, Toshio; Nishimura, Takashi

    1991-01-01

    Fundamental investigations were done on electron beam (EB) melting of sponge titanium by using 80 kW EB melting furnace. Results obtained are as follows: (1) To increase the melting yield of titanium in EB melting of sponge titanium, it is important to recover splashed metal by installation of water-cooled copper wall around the hearth and to decrease evaporation loss of titanium by keeping the surface temperature of molten metal just above the melting temperature of titanium without local heating. (2) Specific power consumption of drip melting of pressed sponge titanium bar and hearth melting of sponge titanium are approximately 0.9 kWh/kg-Ti and 0.5-0.7 kWh/kg-Ti, respectively. (3) Ratios of the heat conducted to water-cooled mould in the drip melting and to water-cooled hearth in the hearth melting to the electron beam input power are 50-65% and 60-65%, respectively. (4) Surface defects of EB-melted ingots include rap which occurs when the EB output is excessively great, and transverse cracks when the EB output is excessively small. To prevent surface defects, the up-down withdrawal method is effective. (author)

  6. Ultrasonic effects on titanium tanning of leather.

    Science.gov (United States)

    Peng, Biyu; Shi, Bi; Sun, Danhong; Chen, Yaowen; Shelly, Dennis C

    2007-03-01

    The effects of ultrasound on titanium tanning of leather were investigated. Either 20 or 40 kHz ultrasound was applied to the titanium tanning of pigskins. Five different treatment conditions were carried out and the effects were examined, such as leather shrinkage temperature (T(s)), titanium content and titanium distribution in the leather. Overall heat loading was carefully controlled. Results showed that 20 kHz ultrasound effectively improves titanium agent penetration into the hide and increases the leather's shrinkage temperature. Doubling the frequency to 40 kHz produced negligible enhancements. An impressive 105.6 degrees C T(s) was achieved using 20 kHz ultrasound pretreatment of the tanning liquor followed by 20 kHz ultrasound in the tanning mixture (liquor plus pigskins) in a special salt-free medium. Finally, using a unique ultrasonic tanning drum with 26.5 kHz ultrasound, the T(s) reached a record level of 106.5 degrees C, a value not achieved in conventional (no ultrasound) titanium tanning. The ultrasonic effects on titanium tanning of leather are judged to make a superior mineral tanned leather.

  7. DAKWAH DAN PEMBERDAYAAN PEREMPUAN

    Directory of Open Access Journals (Sweden)

    Siti Nurmahyati

    2017-02-01

    Full Text Available Da’wah is an attempt to persuade and influence others in realizing the teachings of Islam, to achieve worldly prosperity and welfare of the hereafter. The success was fueled by propaganda aspects are interrelated, anatara preachers, propaganda material, propaganda strategy, mad’u (target da’wah. The number of women in this country nearly half of people (49.36. therefore, it is important to empower women in da’wah to build their own people in consciousness and religious activities that provide the basics of life prosperous world and hereafter.   Dakwah merupakan suatu upaya untuk mengajak dan mempengaruhi orang lain dalam merealisasikan ajaran Islam, untuk mencapai tujuan kesejahteraan duniawi maupun kesejahteraan ukhrawi. Keberhasilan tersebut pun dipicu oleh berbagai aspek dakwah yang saling terkait, antara juru dakwah, materi dakwah, strategi dakwah, mad’u (sasaran dakwah. Jumlah kaum perempuan di negara ini hampir mencapai separuh dari jumlah masyarakatnya (49,36. Oleh karena itu, sangat penting sekali pemberdayaan perempuan dalam dakwah untuk membangun kaumnya sendiri dalam kesadaran dan aktivitas-aktivitas keagamaan yang memberikan dasar kehidupan sejahtera duniawi dan ukhrawi.

  8. ASIMETRI INFORMASI DAN UNDERPRICING

    Directory of Open Access Journals (Sweden)

    Tety Anggita Safitri

    2013-03-01

    Full Text Available Tujuan penelitian ini adalah untuk menguji pengaruh asimetri informasi terhadap underpricing. Penelitian ini menggunakan sampel 63 perusahaan yang melakukan penawaran umum perdana di Bursa Efek Indonesia dalam kurun waktu 2005-2010. Analisis data menggunakan regresi linier berganda, yaitu menguji proksi asimetri informasi yang terdiri atas ukuran perusahaan, umur perusahaan, proporsi saham yang ditawarkan kepada masyarakat, reputasi underwriter dan reputasi auditor terhadap underpricing. Hasil penelitian ini mengindikasikan bahwa reputasi underwriter dan reputasi auditor berpengaruh terhadap underpricing. Ukuran perusahaan, umur perusahaan dan proporsi saham yang ditawarkan tidak berpengaruh terhadap underpricing.The aim of this research is to examine the effect of assymetric information on underpricing. This research used a sample of 63 companies that make initial public offering on the Indonesia Stock Exchange in the period of 2005-2010. The data analysis is using multiple linear regression, which is testing the proxy of asymmetric information which consists of the firm size, the firm age, the proportion of shares offered to the public, underwriter reputation and auditor reputation on underpricing. This research indicates that underwriter reputation and auditor reputation have a significant effect on underpricing. The firm size, the firm age and the proportion of shares offered to the public have no significant effect on underpricing.

  9. [The surface roughness analysis of the titanium casting founding by a new titanium casting investment material].

    Science.gov (United States)

    Liang, Qin-ye; Wu, Xia-yi; Lin, Xue-feng

    2012-04-01

    To investigate the surface roughness property of the titanium castings cast in a new investment for titanium casting. Six wax patterns (20 mm × 20 mm × 0.5 mm) were invested using two investments: three in a new titanium investment material and three in the control material (Rematitan Plus). Six titanium specimens were obtained by conventional casting. After casting, surface roughness of the specimens were evaluated with a surface profilometer. The surface roughness of the specimens cast in new titanium investment material was (1.72 ± 0.08) µm, which was much smaller than that from Rematitan Plus [(1.91 ± 0.15) µm, P cast using these two investment materials are both smooth enough to fulfill the demand of the titanium precision-casting for prosthodontic clinical use.

  10. Corrosion behaviour and galvanic coupling of titanium and welded titanium in LiBr solutions

    International Nuclear Information System (INIS)

    Blasco-Tamarit, E.; Igual-Munoz, A.; Garcia Anton, J.; Garcia-Garcia, D.

    2007-01-01

    Corrosion resistance and galvanic coupling of Grade 2 commercially pure titanium in its welded and non-welded condition were systematically analyzed in LiBr solutions. Galvanic corrosion was evaluated through two different methods: anodic polarization (according to the Mixed Potential Theory) and electrochemical noise (using a zero-resistance ammeter). Samples have been etched to study the microstructure. The action of lithium chromate as corrosion inhibitor has been evaluated. Titanium and welded titanium showed extremely low corrosion current densities and elevated pitting potential values (higher than 1 V). The results of both methods, anodic polarization and electrochemical noise, showed that the welded titanium was always the anodic element of the pair titanium-welded titanium, so that its corrosion resistance decreases due to the galvanic effect

  11. On the use of titanium hydride for powder injection moulding of titanium-based alloys

    International Nuclear Information System (INIS)

    Carrenoo-Morelli, E.; Bidaux, J.-E.

    2009-01-01

    Full text: Titanium and titanium-based alloys are excellent materials for a number of engineering applications because of their high strength, lightweight, good corrosion resistance, non magnetic characteristic and biocompatibility. The current processing steps are usually costly, and there is a growing demand for net-shape solutions for manufacturing parts of increasing complexity. Powder injection moulding is becoming a competitive alternative, thanks to the advances in production of good quality base-powders, binders and sintering facilities. Titanium hydride powders, have the attractiveness of being less reactive than fine titanium powders, easier to handle, and cheaper. This paper summarizes recent advances on PIM of titanium and titanium alloys from TiH2 powders, including shape-memory NiTi alloys. (author)

  12. Isothermal deformation of gamma titanium aluminide

    International Nuclear Information System (INIS)

    Srinivasan, R.; Singh, J.P.; Tuval, E.; Weiss, I.

    1996-01-01

    Gamma titanium aluminide has received considerable attention in recent years from the automotive industry as a potential material for making rotating and reciprocating components to produce a quieter and more efficient engine. The objectives of this study were to identify processing routes for the manufacture of automobile valves from gamma titanium aluminide. The issues considered were microstructure and composition of the material, and processing parameters such as deformation rates, temperatures, and total deformation. This paper examines isothermal deformation of gamma titanium aluminide in order to develop a processing window for this type of material

  13. Chemistry of titanium, zirconium and thorium picramates

    International Nuclear Information System (INIS)

    Srivastava, R.S.; Agrawal, S.P.; Bhargava, H.N.

    1976-01-01

    Picramates of titanium, zirconium and thorium are prepared by treating the aqueous sulphate, chloride and nitrate solutions with sodium picramate. Micro-analysis, colorimetry and spectrophotometry are used to establish the compositions (metal : ligand ratio) of these picramates as 1 : 2 (for titanium and zirconium) and 1 : 4 (for thorium). IR studies indicate H 2 N → Me coordination (where Me denotes the metal). A number of explosive properties of these picramates point to the fact that the zirconium picramate is thermally more stable than the picramates of titanium and thorium. (orig.) [de

  14. Titanium exposure and yellow nail syndrome

    Directory of Open Access Journals (Sweden)

    Ali Ataya

    2015-01-01

    Full Text Available Yellow nail syndrome is a rare disease of unclear etiology. We describe a patient who develops yellow nail syndrome, with primary nail and sinus manifestations, shortly after amalgam dental implants. A study of the patient's nail shedding showed elevated nail titanium levels. The patient had her dental implants removed and had complete resolution of her sinus symptoms with no change in her nail findings. Since the patient's nail findings did not resolve we do not believe titanium exposure is a cause of her yellow nail syndrome but perhaps a possible relationship exists between titanium exposure and yellow nail syndrome that requires further studies.

  15. Clinical bending of nickel titanium wires

    Directory of Open Access Journals (Sweden)

    Stephen Chain

    2015-01-01

    Full Text Available Since the evolution and the involvement of Nickel Titanium wires in the field of Orthodontics. The treatment plan has evolved with the use of low force Nickel Titanium wires. Because of their high springback, low stiffness, they are the key initial wires in leveling and alignment but have poor formability. Since poor formability limits its ability to create variable arch forms thus; limits the form of treatment. We have devised a method to bend the Nickel Titanium wires to help in our inventory but also customized the wire according to the treatment.

  16. Current assisted superplastic forming of titanium alloy

    Directory of Open Access Journals (Sweden)

    Wang Guofeng

    2015-01-01

    Full Text Available Current assisted superplastic forming combines electric heating technology and superplastic forming technology, and can overcome some shortcomings of traditional superplastic forming effectively, such as slow heating rate, large energy loss, low production efficiency, etc. Since formability of titanium alloy at room temperature is poor, current assisted superplastic forming is suitable for titanium alloy. This paper mainly introduces the application of current assisted superplastic forming in the field of titanium alloy, including forming technology of double-hemisphere structure and bellows.

  17. Gentamicin-Eluting Titanium Dioxide Nanotubes Grown on the Ultrafine-Grained Titanium.

    Science.gov (United States)

    Nemati, Sima Hashemi; Hadjizadeh, Afra

    2017-08-01

    Titanium (Ti)-based materials is the most appropriate choices for the applications as orthopedic and dental implants. In this regard, ultrafine-grained (UFG) titanium with an enhanced mechanical properties and surface energy has attracted more attention. Titanium dioxide (TiO 2 ) nanotubes grown on the titanium could enhance bone bonding, cellular response and are good reservoirs for loading drugs and antibacterial agents. This article investigates gentamicin loading into and release from the TiO 2 nanotubes, grown on the UFG compared to coarse-grained (CG) titanium substrate surfaces. Equal Channel Angular Pressing (ECAP) was employed to produce the UFG structure titanium. TiO 2 nanotubes were grown by the anodizing technique on both UFG and CG titanium substrate surfaces. Scanning electron microscopy (SEM) imaging confirmed TiO 2 nanotube growth on the surface. The UV-vis spectroscopy analysis results show that the amount of gentamicin load-release in the anodized UFG titanium sample is higher than that of CG one which can be explained in terms of thicker TiO 2 nanotube arrays layer formed on UFG sample. Moreover, the anodized UFG titanium samples released the drug in a longer time than CG (1 day for the UFG titanium vs. 3 h for the CG one). Regarding wettability analysis, anodized UFG titanium sample showed more enhanced hydrophilicity than CG counterpart. Therefore, the significantly smaller grain size of pure titanium provided by the ECAP technique coupled with appropriate subsequent anodization treatment not only offers a good combination of biocompatibility and adequate mechanical properties but also it provides a delayed release condition for gentamicin.

  18. Leaching of Titanium and Silicon from Low-Grade Titanium Slag Using Hydrochloric Acid Leaching

    Science.gov (United States)

    Zhao, Longsheng; Wang, Lina; Qi, Tao; Chen, Desheng; Zhao, Hongxin; Liu, Yahui; Wang, Weijing

    2018-05-01

    Acid-leaching behaviors of the titanium slag obtained by selective reduction of vanadium-bearing titanomagnetite concentrates were investigated. It was found that the optimal leaching of titanium and silicon were 0.7% and 1.5%, respectively. The titanium and silicon in the titanium slag were firstly dissolved in the acidic solution to form TiO2+ and silica sol, and then rapidly reprecipitated, forming hydrochloric acid (HCl) leach residue. Most of the silicon presented in the HCl leach residue as floccules-like silica gel, while most of the titanium was distributed in the nano-sized rod-like clusters with crystallite refinement and intracrystalline defects, and, as such, 94.3% of the silicon was leached from the HCl leach residue by alkaline desilication, and 96.5% of the titanium in the titanium-rich material with some rutile structure was then digested by the concentrated sulfuric acid. This provides an alternative route for the comprehensive utilization of titanium and silicon in titanium slag.

  19. Synthesis of Titanium Oxycarbide from Titanium Slag by Methane-Containing Gas

    Science.gov (United States)

    Dang, Jie; Fatollahi-Fard, Farzin; Pistorius, Petrus Christiaan; Chou, Kuo-Chih

    2018-02-01

    In this study, reaction steps of a process for synthesis of titanium oxycarbide from titanium slag were demonstrated. This process involves the reduction of titanium slag by a methane-hydrogen-argon mixture at 1473 K (1200 °C) and the leaching of the reduced products by hydrofluoric acid near room temperature to remove the main impurity (Fe3Si). Some iron was formed by disproportionation of the main M3O5 phase before gaseous reduction started. Upon reduction, more iron formed first, followed by reduction of titanium dioxide to suboxides and eventually oxycarbide.

  20. Titanium disilicide formation by sputtering of titanium on heated silicon substrate

    Science.gov (United States)

    Tanielian, M.; Blackstone, S.

    1984-09-01

    We have sputter deposited titanium on bare silicon substrates at elevated temperatures. We find that at a substrate temperature of about 515 °C titanium silicide is formed due to the reaction of the titanium with the Si. The resistivity of the silicide is about 15 μΩ cm and it is not etchable in a selective titanium etch. This process can have applications in low-temperature, metal-oxide-semiconductor self-aligned silicide formation for very large scale integrated

  1. DAMPAK NEGATIF PERKEMBANGAN TEKNOLOGI INFORMATIKA DAN KOMUNIKASI DAN CARA ANTISIFASINYA

    Directory of Open Access Journals (Sweden)

    I Gede Ratnaya

    2011-03-01

    Full Text Available Sampai saat ini perkembangan ilmu pengetahuan telah menghantarkan masyarakat menuju babak baru yaitu babak yang memanfaatkan peralatan-peralatan yang merupakan hasil dari teknologi. Penggunaan tenaga manusia yang semakin hari semakin kecil volumenya sering kali menyebabkan orang kehilangan pekerjaannya karena tugasnya telah tergantikan oleh peralatan atau mesin. Sebagai sarana penyampaian informasi dan komunikasi, komputer bisa dipakai sebagai sarana berinternetan. Lewat internet orang bisa mencari bermacam-macam informasi dan berkomunikasi. Peran yang dapat diberikan oleh aplikasi teknologi informasi ini adalah mendapatkan informasi untuk kehidupan pribadi seperti informasi tentang kesehatan, hobi, rekreasi, dan rohani. Selain memberikan keuntungan, ternyata peralatan teknologi informasi dan komunikasi juga memberikan dampak negatif bagi penggunanya. Dampak negatif tersebut muncul sebagai akibat dari penggunaan yang salah atau tidak bertanggung jawab dari yang menggunakan. Beberapa dampak negatif tersebut adalah 1. Anak lebih banyak menghabiskan waktu menonton TV ketimbang melakukan hal lainnya (seperti belajar dan olah raga, 2. Anak kehilangan kemampuan berbaur dengan masyarakat dan cenderung nyaman dengan kehidupan online, 3 Adanya pelanggaran hak cipta, 4.  Kejahatan di internet, 5. Penyebaran virus komputer, dan 6. Pornografi, perjudian, penipuan, tayangan kekerasan. Adapun cara mengatasi dampak-dampak negatif tersebut adalah : 1. Gunakan teknologi untuk menjalin hubungan dengan orang yang sudah dikenal, 2. Cari komunitas positif  yang sering melakukan pertemuan didunia nyata, 3. Perlunya penegakkan hukum yang berlaku dengan dibentuknya polisi internet, 4. Menghindari pemakaian telepon seluler yang berfitur canggih oleh anak-anak dibawah umur dan lebih mengawasi penggunaan telepon seluler, 5. Perbanyak membaca buku-buku yang bersifat edukatif dan bersifat keimanan serta aplikasi komputer yang bersifat mendidik, dan 6. Perlunya pengaturan

  2. Titanium Aluminide Casting Technology Development

    Science.gov (United States)

    Bünck, Matthias; Stoyanov, Todor; Schievenbusch, Jan; Michels, Heiner; Gußfeld, Alexander

    2017-12-01

    Titanium aluminide alloys have been successfully introduced into civil aircraft engine technology in recent years, and a significant order volume increase is expected in the near future. Due to its beneficial buy-to-fly ratio, investment casting bears the highest potential for cost reduction of all competing production technologies for TiAl-LPTB. However, highest mechanical properties can be achieved by TiAl forging. In view of this, Access e.V. has developed technologies for the production of TiAl investment cast parts and TiAl die cast billets for forging purposes. While these parts meet the highest requirements, establishing series production and further optimizing resource and economic efficiency are present challenges. In order to meet these goals, Access has recently been certified according to aircraft standards, aiming at qualifying parts for production on technology readiness level 6. The present work gives an overview of the phases of development and certification.

  3. Erbium diffusion in titanium dioxide

    Directory of Open Access Journals (Sweden)

    Louise Basse

    2017-04-01

    Full Text Available The diffusivity of erbium in the anatase phase of titanium dioxide (TiO2 has been studied for various temperatures ranging from 800 °C to 1, 000 °C. Samples of TiO2, with a 10 nm thick buried layer containing 0.5 at% erbium, were fabricated by radio-frequency magnetron sputtering and subsequently heat treated. The erbium concentration profiles were measured by secondary ion mass spectrometry, allowing for determination of the temperature-dependent diffusion coefficients. These were found to follow an Arrhenius law with an activation energy of ( 2.1 ± 0.2 eV. X-ray diffraction revealed that the TiO2 films consisted of polycrystalline grains of size ≈ 100 nm.

  4. KETERGANTUNGAN ONLINE GAME DAN PENANGANANNYA

    Directory of Open Access Journals (Sweden)

    Ridwan Syahran

    2015-06-01

    Full Text Available Penelitian ini dimaksudkan untuk mengetahui perilaku yang ditimbulkan dari kecanduan bermaian online game pada siswa SMP Negeri 1 Palu yang meliputi faktor-faktor penyebab kecanduan, keadaan psikologis yang ditimbulkan dari kecanduan bermain online game dan dampak-dampak yang ditimbulkan dari kecanduan bermain online game.Pendekatan penelitian ini adalah penelitian kualitatif dengan jenis penelitian studi kasus dengan berdasarkan responden dan informan sebagai bahan sumber data. Dalam proses pengumpulan data digunakan teknik observasi dan wawancara, dimana setelah data diperoleh selanjutnya dianalisis dengan menggunakan analisis deskriptif kualitatif.Berdasarkan hasil penelitian ini, bahwa subyek (RZ dan (MT, kedua subyek penelitian menjadi ketergantungan atau kecanduan untuk bermain online game yang dikarenakan tersedianya beberapa fasilitas pendukung untuk bermain game di rumah, adanya faktor sosial dari pertemanan dengan teman bermain dan keingintahuan yang sangat besar terhadap suatu jenis game. Penanganan ketergantungan game online dengan bantuan dari berbagai pihak terutama pihak sekolah memberikan kepercayaan kepada konselor sekolah atau guru BK untuk mengadakan seminar kepada orang tua siswa tentang game online dan masalah yang akan ditimbulkan, mengatur waktu belajar dan bermain anak, memasukkan materi tentang game online dan dampaknya kepada siswa serta memberikan penyaluran yang baik dalam memilih game yang edukatif serta Menjalin komunikasi interpersonal agar anak dapat terbuka dengan orang tua.

  5. Carbon nanotube-based coatings on titanium

    Indian Academy of Sciences (India)

    Administrator

    mon method is the deposition of bioactive ceramic mate- rials on the metal ... tion of nanoparticle layer, including carbon nanoparti- ... Coatings made of CNTs provide implants with .... reaches composite of CNT built into titanium oxide formed.

  6. Titanium Brazing for Structures and Survivability

    National Research Council Canada - National Science Library

    Doherty, Kevin J; Tice, Jason R; Szewczyk, Steven T; Glide, Gary A

    2007-01-01

    .... While welding is the typical joining method for titanium, vacuum brazing is an option in areas that are difficult to access for welding as well as areas near other nonmetallic materials, such as ceramics...

  7. Titanium application to power plant condensers

    International Nuclear Information System (INIS)

    Itoh, H.

    1987-01-01

    Recently, the growth of operating performance and construction plan of titanium-tubed condensers in thermal and unclear power plants has been very impressive. High-quality, thinner welded titanium tubes used for cooling tubes, matching design specifications of condensers, have been stably supplied through mass production. It now can be said that various technical problems for titanium-tubed condensers have been solved, but data on operating performance in large-scale commercial plants are still scarce, and site-by-site information needs be exchanged more frequently and on a larger scale. Projects to replace existing condenser cooling tubes with those of corrosion-resistant titanium have been actively furthered, with the only remaining barrier to full employment being cost effectiveness. It is hoped that condenser and tube manufacturers will conduct more joint value analyses

  8. Stress corrosion cracking of titanium alloys

    Science.gov (United States)

    May, R. C.; Beck, F. H.; Fontana, M. G.

    1971-01-01

    Experiments were conducted to study (1) the basic electrochemical behavior of titanium in acid chloride solutions and (2) the response of the metal to dynamic straining in the same evironment. The aim of this group of experiments was to simulate, as nearly as possible, the actual conditions which exist at the tip of a crack. One of the foremost theories proposed to explain the propagation of stress corrosion cracks is a hydrogen embrittlement theory involving the precipitation of embrittling titanium hydrides inside the metal near the crack tip. An initial survey of the basic electrochemical literature indicated that surface hydrides play a critical role in the electrochemistry of titanium in acid solutions. A comprehensive analysis of the effect of surface films, particularly hydrides, on the electrochemical behavior of titanium in these solution is presented.

  9. Titanium Heat Pipe Thermal Plane, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — The objective of the Phase II program is to complete the development of the titanium heat pipe thermal plane and establish all necessary steps for production of this...

  10. Titanium Nanocomposite: Lightweight Multifunction Structural Material

    Data.gov (United States)

    National Aeronautics and Space Administration — We propose to research and develop lightweight metal matrix nanocomposites (MMnC) using a Titanium (Ti) metal matrix. Ti MMnC will crosscut the advancement of both...

  11. Corrosion resistance of titanium alloys for dentistry

    International Nuclear Information System (INIS)

    Laskawiec, J.; Michalik, R.

    2001-01-01

    Titanium and its alloys belong to biomaterials which the application scope in medicine increases. Some properties of the alloys, such as high mechanical strength, low density, low Young's modulus, high corrosion resistance and good biotolerance decide about it. The main areas of the application of titanium and its alloys are: orthopedics and traumatology, cardiosurgery, faciomaxillary surgery and dentistry. The results of investigations concerning the corrosion resistance of the technical titanium and Ti6Al14V alloy and comparatively a cobalt alloy of the Vitallium type in the artificial saliva is presented in the work. Significantly better corrosion resistance of titanium and the Ti6Al14V than the Co-Cr-Mo alloy was found. (author)

  12. 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

  13. Interfacial reactions between titanium and borate glass

    Energy Technology Data Exchange (ETDEWEB)

    Brow, R.K. [Sandia National Labs., Albuquerque, NM (United States); Saha, S.K.; Goldstein, J.I. [Lehigh Univ., Bethlehem, PA (United States). Dept. of Materials Science

    1992-12-31

    Interfacial reactions between melts of several borate glasses and titanium have been investigated by analytical scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS). A thin titanium boride interfacial layer is detected by XPS after short (30 minutes) thermal treatments. ASEM analyses after longer thermal treatments (8--120 hours) reveal boron-rich interfacial layers and boride precipitates in the Ti side of the interface.

  14. Lubrication for hot working of titanium alloys

    International Nuclear Information System (INIS)

    Gotlib, B.M.

    1980-01-01

    The isothermal lubrication of the following composition is suggested, wt. %: aluminium powder 4-6, iron scale 15-25, vitreous enamel up to 100. The lubricant improves forming and decreases the danger of the metal fracture when titanium alloys working. It is advisable to use the suggested lubrication when stamping thin-walled products of titanium alloys at the blank temperature from 700 to 1000 deg C [ru

  15. Friction Welding of Titanium and Carbon Steel

    OpenAIRE

    Atsushi, HASUI; Yoichi, KIRA; Faculty of Science and Technology, Keio University; Ishikawajima-Harima Heavy Industries, Co., Ltd.

    1985-01-01

    Titanium-steel is a combination of dissimilar materials, which are difficult to weld in general, owing to inevitable formation of brittle intermetallic compounds. A prominent feature of friction welding process is ability to weld dissimilar materials in many kinds of combinations. This report deals with friction weldabilily of pure titanium and S25C steel, which are 12 mm in diameter. Main results are summarized as follows; (1) Suitable welding conditions to obtain a sound weld, which has a j...

  16. Lactam inhibiting Streptococcus mutans growth on titanium

    Energy Technology Data Exchange (ETDEWEB)

    Xavier, J.G.; Geremias, T.C.; Montero, J.F.D. [Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina - UFSC, Florianópolis/SC, 88040-900 (Brazil); Vahey, B.R. [Herman Ostrow School of Dentistry of USC, 925 W 34 St, Los Angeles, CA 90089 (United States); Benfatti, C.A.M.; Souza, J.C.M.; Magini, R.S. [Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina - UFSC, Florianópolis/SC, 88040-900 (Brazil); Pimenta, A.L., E-mail: andrea@intelab.ufsc.br [Department of Biologia, ERRMECe, Université de Cergy Pontoise, 2, Av. Adolphe Chauvin 95302 Cergy, Pontoise (France); Integrated Laboratories Technologies (InteLab), Dept. Chemical and Food Engineering (EQA), Federal University of Santa Catarina - UFSC, Florianópolis/SC, 88040-970 (Brazil)

    2016-11-01

    The aim of this work was to analyze the activity of novel synthetic lactams on preventing biofilm formation on titanium surfaces. Titanium (Ti6Al4V) samples were exposed to Streptococcus mutans cultures in the presence or absence of a synthetic lactam. After 48 h incubation, planktonic growth was determined by spectrophotometry. Biofilm was evaluated by crystal violet staining and colony forming units (CFU·ml{sup −1}), followed by scanning electron microscopy (SEM). Results showed that the average of adhered viable cells was approximately 1.5 × 10{sup 2} CFU/ml in the presence of lactam and 4 × 10{sup 2} CFU/ml in its absence. This novel compound was considerable active in reducing biofilm formation over titanium surfaces, indicating its potential for the development of antimicrobial drugs targeting the inhibition of the initial stages of bacterial biofilms on dental implants abutments. - Highlights: • A novel synthetic compound is tested on preventing biofilm formation on titanium surfaces • Biofilm inhibition has been achieved on titanium surfaces containing the novel compound. • Planktonic growth of S. mutans was not affected by the presence of lactams on titanium.

  17. Lactam inhibiting Streptococcus mutans growth on titanium

    International Nuclear Information System (INIS)

    Xavier, J.G.; Geremias, T.C.; Montero, J.F.D.; Vahey, B.R.; Benfatti, C.A.M.; Souza, J.C.M.; Magini, R.S.; Pimenta, A.L.

    2016-01-01

    The aim of this work was to analyze the activity of novel synthetic lactams on preventing biofilm formation on titanium surfaces. Titanium (Ti6Al4V) samples were exposed to Streptococcus mutans cultures in the presence or absence of a synthetic lactam. After 48 h incubation, planktonic growth was determined by spectrophotometry. Biofilm was evaluated by crystal violet staining and colony forming units (CFU·ml −1 ), followed by scanning electron microscopy (SEM). Results showed that the average of adhered viable cells was approximately 1.5 × 10 2 CFU/ml in the presence of lactam and 4 × 10 2 CFU/ml in its absence. This novel compound was considerable active in reducing biofilm formation over titanium surfaces, indicating its potential for the development of antimicrobial drugs targeting the inhibition of the initial stages of bacterial biofilms on dental implants abutments. - Highlights: • A novel synthetic compound is tested on preventing biofilm formation on titanium surfaces • Biofilm inhibition has been achieved on titanium surfaces containing the novel compound. • Planktonic growth of S. mutans was not affected by the presence of lactams on titanium.

  18. The effect of titanium surface treatment on the interfacial strength of titanium – Thermoplastic composite joints

    NARCIS (Netherlands)

    Su, Yibo; de Rooij, Matthijn; Grouve, Wouter; Akkerman, Remko

    2017-01-01

    Co-consolidated titanium – carbon fibre reinforced thermoplastic composite hybrid joints show potential for application in aerospace structures. The strength of the interface between the titanium and the thermoplastic composite is crucial for the strength of the entire hybrid joint. Application of a

  19. Artefacts in multimodal imaging of titanium, zirconium and binary titanium-zirconium alloy dental implants: an in vitro study.

    Science.gov (United States)

    Smeets, Ralf; Schöllchen, Maximilian; Gauer, Tobias; Aarabi, Ghazal; Assaf, Alexandre T; Rendenbach, Carsten; Beck-Broichsitter, Benedicta; Semmusch, Jan; Sedlacik, Jan; Heiland, Max; Fiehler, Jens; Siemonsen, Susanne

    2017-02-01

    To analyze and evaluate imaging artefacts induced by zirconium, titanium and titanium-zirconium alloy dental implants. Zirconium, titanium and titanium-zirconium alloy implants were embedded in gelatin and MRI, CT and CBCT were performed. Standard protocols were used for each modality. For MRI, line-distance profiles were plotted to quantify the accuracy of size determination. For CT and CBCT, six shells surrounding the implant were defined every 0.5 cm from the implant surface and histogram parameters were determined for each shell. While titanium and titanium-zirconium alloy induced extensive signal voids in MRI owing to strong susceptibility, zirconium implants were clearly definable with only minor distortion artefacts. For titanium and titanium-zirconium alloy, the MR signal was attenuated up to 14.1 mm from the implant. In CT, titanium and titanium-zirconium alloy resulted in less streak artefacts in comparison with zirconium. In CBCT, titanium-zirconium alloy induced more severe artefacts than zirconium and titanium. MRI allows for an excellent image contrast and limited artefacts in patients with zirconium implants. CT and CBCT examinations are less affected by artefacts from titanium and titanium-zirconium alloy implants compared with MRI. The knowledge about differences of artefacts through different implant materials and image modalities might help support clinical decisions for the choice of implant material or imaging device in the clinical setting.

  20. GAMBARAN JENIS DAN JUMLAH KONSUMSI FAST FOOD DAN SOFT DRINK PADA MAHASISWA OBESITAS DI UNIVERSITAS HASANUDDIN

    OpenAIRE

    Suryanti, Rut; Jafar, Nurhaedar; Syam, Aminuddin

    2013-01-01

    Konsumsi fast food dan soft drink dapat menyebabkan kelebihan berat badan dan obesitas.Penelitian ini bertujuan untuk mengetahui gambaran jenis dan jumlah zat gizi makro dari konsumsi fast food dan soft drink pada mahasiswa yang obesitas.Jenis penelitian adalah deskriptif, dilaksanakan pada bulan Mei-Juni 2013 di Universitas Hasanuddin dengan jumlah responden 60 orang. Instrument penelitian adalah kuesioner identitas diri dan food frekuensiSemiQuantitatif fast food dan soft drink, food pictur...

  1. PERSEPSI DAN TRANSFORMASI VISI DAN MISI PADA CIVITAS AKADEMIKA STAIN PEKALONGAN

    Directory of Open Access Journals (Sweden)

    Imam Khanafi

    2013-05-01

    Full Text Available Penelitian ini mengukur tingkat persepsi visi dan misi civitas akademika STAIN Pekalongan, dan mengukur juga tingkat implementasi sebagai transformasi visi misi tersebut serta menemukan hubungan antara persepsi dengan implementasinya. Kajian ini memiliki signifikan yang strategis dalam konteks manajemen dan pengembangan Pendidikan di STAIN Pekalongan dan lembaga pendidikan lainnya. Hal ini karena posisi visi dan misi sebagai kerangka acuan (frame of reference yang mengarahkan dan menjelaskan kepada keseluruh unsur civitas akademika dalam setiap program kerjanya.

  2. Development and Evaluation of Titanium Spacesuit Bearings

    Science.gov (United States)

    Rhodes, Richard; Battisti, Brian; Ytuarte, Raymond, Jr.; Schultz, Bradley

    2016-01-01

    The Z-2 Prototype Planetary Extravehicular Space Suit Assembly is a continuation of NASA's Z-series of spacesuits, designed with the intent of meeting a wide variety of exploration mission objectives, including human exploration of the Martian surface. Incorporating titanium bearings into the Z-series space suit architecture allows us to reduce mass by an estimated 23 lbs per suit system compared to the previously used stainless steel bearing race designs, without compromising suit functionality. There are two obstacles to overcome when using titanium for a bearing race- 1) titanium is flammable when exposed to the oxygen wetted environment inside the space suit and 2) titanium's poor wear properties are often challenging to overcome in tribology applications. In order to evaluate the ignitability of a titanium space suit bearing, a series of tests were conducted at White Sands Test Facility (WSTF) that introduced the bearings to an extreme test profile, with multiple failures imbedded into the test bearings. The testing showed no signs of ignition in the most extreme test cases; however, substantial wear of the bearing races was observed. In order to design a bearing that can last an entire exploration mission (approx. 3 years), design parameters for maximum contact stress need to be identified. To identify these design parameters, bearing test rigs were developed that allow for the quick evaluation of various bearing ball loads, ball diameters, lubricants, and surface treatments. This test data will allow designers to minimize the titanium bearing mass for a specific material and lubricant combination and design around a cycle life requirement for an exploration mission. This paper reviews the current research and testing that has been performed on titanium bearing races to evaluate the use of such materials in an enriched oxygen environment and to optimize the bearing assembly mass and tribological properties to accommodate for the high bearing cycle life for an

  3. Creating nanoshell on the surface of titanium hydride bead

    Directory of Open Access Journals (Sweden)

    PAVLENKO Vyacheslav Ivanovich

    2016-12-01

    Full Text Available The article presents data on the modification of titanium hydride bead by creating titanium nanoshell on its surface by ion-plasma vacuum magnetron sputtering. To apply titanium nanoshell on the titanium hydride bead vacuum coating plant of multifunctional nanocomposite coatings QVADRA 500 located in the center of high technology was used. Analysis of the micrographs of the original surface of titanium hydride bead showed that the microstructure of the surface is flat, smooth, in addition the analysis of the microstructure of material surface showed the presence of small porosity, roughness, mainly cavities, as well as shallow longitudinal cracks. The presence of oxide film in titanium hydride prevents the free release of hydrogen and fills some micro-cracks on the surface. Differential thermal analysis of both samples was conducted to determine the thermal stability of the initial titanium hydride bead and bead with applied titanium nanoshell. Hydrogen thermal desorption spectra of the samples of the initial titanium hydride bead and bead with applied titanium nanoshell show different thermal stability of compared materials in the temperature range from 550 to 860о C. Titanium nanoshells applied in this way allows increasing the heat resistance of titanium hydride bead – the temperature of starting decomposition is 695о C and temperature when decomposition finishes is more than 1000о C. Modified in this way titanium hydride bead can be used as a filler in the radiation protective materials used in the construction or upgrading biological protection of nuclear power plants.

  4. Amorphous titanium-oxide supercapacitors

    Science.gov (United States)

    Fukuhara, Mikio; Kuroda, Tomoyuki; Hasegawa, Fumihiko

    2016-10-01

    The electric capacitance of an amorphous TiO2-x surface increases proportionally to the negative sixth power of the convex diameter d. This occurs because of the van der Waals attraction on the amorphous surface of up to 7 mF/cm2, accompanied by extreme enhanced electron trapping resulting from both the quantum-size effect and an offset effect from positive charges at oxygen-vacancy sites. Here we show that a supercapacitor, constructed with a distributed constant-equipment circuit of large resistance and small capacitance on the amorphous TiO2-x surface, illuminated a red LED for 37 ms after it was charged with 1 mA at 10 V. The fabricated device showed no dielectric breakdown up to 1,100 V. Based on this approach, further advances in the development of amorphous titanium-dioxide supercapacitors might be attained by integrating oxide ribbons with a micro-electro mechanical system.

  5. Titanium template for scaphoid reconstruction.

    Science.gov (United States)

    Haefeli, M; Schaefer, D J; Schumacher, R; Müller-Gerbl, M; Honigmann, P

    2015-06-01

    Reconstruction of a non-united scaphoid with a humpback deformity involves resection of the non-union followed by bone grafting and fixation of the fragments. Intraoperative control of the reconstruction is difficult owing to the complex three-dimensional shape of the scaphoid and the other carpal bones overlying the scaphoid on lateral radiographs. We developed a titanium template that fits exactly to the surfaces of the proximal and distal scaphoid poles to define their position relative to each other after resection of the non-union. The templates were designed on three-dimensional computed tomography reconstructions and manufactured using selective laser melting technology. Ten conserved human wrists were used to simulate the reconstruction. The achieved precision measured as the deviation of the surface of the reconstructed scaphoid from its virtual counterpart was good in five cases (maximal difference 1.5 mm), moderate in one case (maximal difference 3 mm) and inadequate in four cases (difference more than 3 mm). The main problems were attributed to the template design and can be avoided by improved pre-operative planning, as shown in a clinical case. © The Author(s) 2014.

  6. Perancangan dan Analisis Redistribution Routing Protocol OSPF dan EIGRP

    Directory of Open Access Journals (Sweden)

    DWI ARYANTA

    2016-02-01

    Full Text Available Abstrak OSPF (Open Shortest Path First dan EIGRP (Enhanced Interior Gateway Routing Protocol adalah dua routing protokol yang banyak digunakan dalam jaringan komputer. Perbedaan karakteristik antar routing protokol menimbulkan masalah dalam pengiriman paket data. Teknik redistribution adalah solusi untuk melakukan komunikasi antar routing protokol. Dengan menggunakan software Cisco Packet Tracer 5.3 pada penelitian ini dibuat simulasi OSPF dan EIGRP yang dihubungkan oleh teknik redistribution, kemudian dibandingkan kualitasnya dengan single routing protokol EIGRP dan OSPF. Parameter pengujian dalam penelitian ini adalah nilai time delay dan trace route. Nilai trace route berdasarkan perhitungan langsung cost dan metric dibandingkan dengan hasil simulasi. Hasilnya dapat dilakukan proses redistribution OSPF dan EIGRP. Nilai delay redistribution lebih baik 1% dibanding OSPF dan 2-3% di bawah EIGRP tergantung kepadatan traffic. Dalam perhitungan trace route redistribution dilakukan 2 perhitungan, yaitu cost untuk area OSPF dan metric pada area EIGRP. Pengambilan jalur utama dan alternatif pengiriman paket berdasarkan nilai cost dan metric yang terkecil, hal ini terbukti berdasarkan perhitungan dan simulasi. Kata kunci: OSPF, EIGRP, Redistribution, Delay, Cost, Metric. Abstract OSPF (Open Shortest Path First and EIGRP (Enhanced Interior Gateway Routing Protocol are two routing protocols are widely used in computer networks. Differences between the characteristics of routing protocols pose a problem in the delivery of data packets. Redistribution technique is the solution for communication between routing protocols. By using the software Cisco Packet Tracer 5.3 in this study were made simulating OSPF and EIGRP redistribution linked by technique, then compared its quality with a single EIGRP and OSPF routing protocols. Testing parameters in this study is the value of the time delay and trace route. Value trace route based on direct calculation of cost

  7. Colloidal Plasmonic Titanium Nitride Nanoparticles: Properties and Applications

    DEFF Research Database (Denmark)

    Guler, Urcan; Suslov, Sergey; Kildishev, Alexander V.

    2015-01-01

    Optical properties of colloidal plasmonic titanium nitride nanoparticles are examined with an eye on their photothermal and photocatalytic applications via transmission electron microscopy and optical transmittance measurements. Single crystal titanium nitride cubic nanoparticles with an average ...

  8. Pengaruh Perebusan, Penggaraman Dan Penjemuran Pada Udang Dan Cumi Terhadap Pembentukan 7 Ketokolesterol

    Directory of Open Access Journals (Sweden)

    Rudi Riyanto

    2007-12-01

    Full Text Available Penelitian pengaruh perebusan, penggaraman dan penjemuran pada udang dan cumi terhadap pembentukan 7‑ketokolesterol telah dilakukan. Dalam penelitian ini, udang dan cumi masing ­masing dibagi dalam dua kelompok. Pada kelompok pertama diberikan perlakuan perebusan dalam air, dan pada kelompok kedua diberikan perlakuan perebusan dalam air garam (3% air garam untuk udang dan 20% air garam untuk cumi. Setelah perebusan, dilakukan pengeringan di bawah matahari (udang dikupas dahulu sebelum dijemur. Pengambilan sampel dilakukan saat kondisi segar, setelah direbus dan setelah dijemur. Pengamatan dilakukan terhadap kandungan 7‑ketokolesterol, kolesterol, nilai TBA, dan kadar air. Hasil penelitian menunjukkan bahwa perebusan, penggaraman dan penjemuran berpengaruh terhadap pembentukan 7‑ketokolesterol sampai konsentrasi 20,82 ppm pada udang dan 15,05 ppm pada cumi sebagai konsentrasi tertinggi produk hasil oksidasi kolesterol yang terbentuk. Penelitian ini dapat dijadikan bukti bahwa pemanasan (perebusan dan penjemuran, serta penggaraman berpengaruh dalam proses oksidasi kolesterol pada udang dan cumi.

  9. Lifetime of titanium filament at constant current

    International Nuclear Information System (INIS)

    Chou, T.S.; Lanni, C.

    1981-01-01

    Titanium Sublimation Pump (TSP) represents the most efficient and the least expensive method to produce Ultra High Vacuum (UHV) in storage rings. In ISABELLE, a proton storage accelerator under construction at Brookhaven National Laboratory, for example, TSP provides a pumping speed for hydrogen of > 2 x 10 6 l/s. Due to the finite life of titanium filaments, new filaments have to be switched in before the end of filament burn out, to ensure smooth operation of the accelerator. Therefore, several operational modes that can be used to activate the TSP were studied. The constant current mode is a convenient way of maintaining constant evaporating rate by increasing the power input while the filament diameter decreases as titanium evaporates. The filaments used in this experiment were standard Varian 916-0024 filaments made of Ti 85%, Mo 15% alloy. During their lifetime at a constant current of 48 amperes, the evaporation rate rose to a maximum at about 10% of their life and then flattened out to a constant value, 0.25 g/hr. The maximum evaporation rate occurs coincidently with the recrystallization of 74% Ti 26% Mo 2 from microstructure crystalline at higher titanium concentration to macrostructure crystalline at lower titanium concentration. As the macrocrystal grows, the slip plane develops at the grain boundary resulting in high resistance at the slip plane which will eventually cause the filament burn out due to local heating

  10. CORPORATE IDENTITY SEJARAH DAN APLIKASINYA

    Directory of Open Access Journals (Sweden)

    Christine Suharto Cenadi

    1999-01-01

    Full Text Available In the recent globalization era%2C and the developed market%2C many companies compete to attract consumers to buy their products. One of the keys to compete and survive in this developing market is by creating an image and graphic identity. This paper will discuss about corporate identity%2C image%2C its purpose and applications. Abstract in Bahasa Indonesia : Dalam era globalisasi dewasa ini%2C dan dengan berkembangnya pasar (market%2C banyak perusahaan bersaing untuk menarik perhatian konsumen untuk membeli produknya. Salah satu cara untuk bersaing dan dapat bertahan di dalam pasar yang terus berkembang ini adalah dengan menciptakan suatu image dan identitas graphic. Tulisan ini akan membahas tentang corporate identity%2C image%2C fungsi dan aplikasinya

  11. Profil Sensori dan Nilai Gizi Beberapa Jenis Ikan Patin dan Hibrid Nasutus

    Directory of Open Access Journals (Sweden)

    Theresia Dwi Suryaningrum

    2010-11-01

    Full Text Available Penelitian mengenai profil sensori dan nilai gizi filet patin Siam (Pangasius hypopthalmus, Jambal (Pangasius djambal Bleeker, Pasupati, Nasutus serta hasil silangan Siam dan Nasutus (hibrid Nasutus telah dilakukan. Analisis sensori dilakukan dengan uji pembeda menyeluruh, uji pembeda atribut, uji kesukaan, dan uji rangking. Pengamatan lainnya dilakukan terhadap edible portion dan nilai gizi (proksimat dan profil asam amino. Hasil penelitian menunjukkan bahwa filet patin hibrid Nasutus lebih memiliki kesamaan warna dengan filet patin Nasutus daripada filet patin Siam. W arna daging filet patin hibrid Nasutus berbeda nyata dengan induknya yaitu patin Nasutus dan patin Siam. Panelis lebih menyukai warna filet patin hibrid Nasutus dibandingkan dengan patin Pasupati. Patin hibrid Nasutus mempunyai tekstur yang berbeda nyata dengan Nasutus dan Jambal yang kompak dan padat, tetapi mempunyai kesamaan dengan patin Siam dan Pasupati yang agak kompak dan agak padat. Berdasarkan intensitas warna, hasil uji pembeda atribut dan uji kesukaan, maka secara berturut-turut panelis menyukai filet patin Jambal, Nasutus, hibrid Nasutus, Pasupati, dan Siam. Hibrid Nasutus mempunyai edible portionpaling tinggi (49% dibandingkan dengan patin lainnya tetapi mempunyai kadar air, kadar lemak, dan kadar protein yang lebih rendah dan berbeda nyata dengan induknya (patin Siam dan Nasutus. Patin Siam mengandung asam amino esensial paling tinggi di antara berbagai jenis patin yang diteliti. Profil asam amino patin hibrid Nasutus, Jambal, Pasupati, dan Nasutus hampir sama, kecuali pada patin Siam yang mengandung glisin, leusin, isoleusin, histidin, serin, treonin, dan prolin yang lebih tinggi dibandingkan dengan patin lainnya

  12. MENGENALI GEJALA TINITUS DAN PENATALAKSANAANNYA

    Directory of Open Access Journals (Sweden)

    Dewi Purwita Agustini

    2016-05-01

    Full Text Available Telinga berdenging atau dikenal dalam bahasa medis sebagai tinitus, banyak dikeluhkan sebagai suatu bising atau bunyi yang muncul di kepala tanpa adanya rangsangan dari luar. Adapun keluhan yang dialami ini seperti bunyi mendengung, mendesis, menderu, atau berbagai variasi bunyi yang lain. Tinitus bukanlah penyakit atau sindroma, tapi hanya merupakan gejala yang mungkin berasal dari satu atau sejumlah kelainan. Sebetulnya suara yang terdengar oleh telinga tersebut belum tentu bersifat kelainan atau patologis. Jika orang sehat yang terbukti telinganya normal, berada dalam ruang kedap (anehoic chamber, maka ia akan dapat mendengar berbagai macam suara yang berasal dari berbagai organ tubuhnya sendiri yang memang bekerja setiap saat, contohnya: pernapasan, kontraksi jantung, dan aliran darah. Kenyataannya, dalam kehidupan sehari-hari, suasana yang memungkinkan suara fisiologis atau normal tersebut terdengar oleh seseorang sangat jarang tercipta dan bahkan dalam kamar yang sunyi di malam hari sekalipun. Hal ini dikarenakan, bunyi masking dari lingkungan dengan berintensitas bunyi sekitar 25 – 30 dB. Tinitus baru menjadi gejala jika suara organ tubuh intensitasnya melebihi bunyi masking lingkungan tadi. Tinitus kerap diderita terutama orang pada kelompok usia pertengahan dan usia tua. Menurut data statistic dari pusat kesehatan di Amerika, sekitar 32% orang dewasa pernah mengalami tinitus pada suatu saat tertentu dalam hidupnya, dan 6 % nya sangat menganggu dan cukup sulit disembuhkan. Di Inggris, 17% populasi juga memiliki masalah tinitus. Sayangnya di Indonesia belum ada data statistic yang memadai, namun berdasarkan pengalaman empiris, penderita tinitus cukup banyak dan sering ditemui di tempat praktek, klinik, maupun rumah sakit. Meski tinitus bukanlah keadaan yang membahayakan, munculnya gejala ini pada hampir kebanyakan orang sangat mengganggu dan sering mempengaruhi kualitas hidup dan pekerjaannya. Kata Kunci: Tinitus, berdenging, telinga

  13. Le CRDI dans les Philippines

    International Development Research Centre (IDRC) Digital Library (Canada)

    Le CRDI appuie la recherche dans les. Philippines depuis 1972. Le travail qu'y ont accompli des universités et des instituts de recherche vigoureux et la participation active de la société civile ont entraîné d'importantes améliorations dans les domaines de l'agriculture, du suivi de la pauvreté et de la gestion des forêts.

  14. XML specifications DanRIS

    DEFF Research Database (Denmark)

    2009-01-01

    XML specifications for DanRIS (Danish Registration- og InformationsSystem), where the the aim is: Improved exchange of data Improved data processing Ensuring future access to all gathered data from the year 1999 until now......XML specifications for DanRIS (Danish Registration- og InformationsSystem), where the the aim is: Improved exchange of data Improved data processing Ensuring future access to all gathered data from the year 1999 until now...

  15. Ketergantungan Online Game Dan Penanganannya

    OpenAIRE

    Syahran, Ridwan

    2015-01-01

    Penelitian ini dimaksudkan untuk mengetahui perilaku yang ditimbulkan dari kecanduan bermaian online game pada siswa SMP Negeri 1 Palu yang meliputi faktor-faktor penyebab kecanduan, keadaan psikologis yang ditimbulkan dari kecanduan bermain online game dan dampak-dampak yang ditimbulkan dari kecanduan bermain online game.Pendekatan penelitian ini adalah penelitian kualitatif dengan jenis penelitian studi kasus dengan berdasarkan responden dan informan sebagai bahan sumber data. Dalam proses ...

  16. Corrosion Behavior of Titanium Based Ceramic Coatings Deposited on Steels

    OpenAIRE

    Ali, Rania

    2016-01-01

    Titanium based ceramic films are increasingly used as coating materials because of their high hardness, excellent wear resistance and superior corrosion resistance. Using electrochemical and spectroscopic techniques, the electrochemical properties of different coatings deposited on different steels under different conditions were examined in this study. Thin films of titanium nitride (TiN), titanium diboride (TiB2), and titanium boronitride with different boron concentrations (TiBN-1&2) w...

  17. Corrosion of titanium and titanium alloys in spent fuel repository conditions - literature review

    International Nuclear Information System (INIS)

    Aho-Mantila, I.; Haenninen, H.; Aaltonen, P.; Taehtinen, S.

    1985-03-01

    The spent nuclear fuel is planned to be disposed in Finnish bedrock. The canister of spent fuel in waste repository is one barrier to the release of radionuclides. It is possible to choose a canister material with a known, measurable corrosion rate and to make it with thickness allowing corrosion to occur. The other possibility is to use a material which is nearly immune to general corrosion. In this second category there are titanium and titanium alloys which exhibit a very high degree of resistance to general corrosion. In this literature study the corrosion properties of unalloyed titanium, titanium alloyed with palladium and titanium alloyed with molybdenum and nickel are reviewed. The two titanium alloys own in addition to the excellent general corrosion properties outstanding properties against localized corrosion like pitting or crevice corrosion. Stress corrosion cracking and corrosion fatique of titanium seem not to be a problem in the repository conditions, but the possibilities of delayed cracking caused by hydrogen should be carefully appreciated. (author)

  18. ENERGI DAN DAMPAKNYA TERHADAP LINGKUNGAN

    Directory of Open Access Journals (Sweden)

    I Made Astra

    2010-11-01

    Full Text Available Energi dapat berubah dari satu bentuk ke bentuk yang  lainnya, perubahannya sering mempengaruhi lingkungan dan udara yang kita hirup dengan berbagai cara. Energy kimia dalam bahan bakar fosil diubah menjadi energy panas, mekanik, atau listrik melalui pembakaran dan  ini sebagai penghasil polutan terbesar. Dan dengan demikian pembangkit listrik, kendaraan bermotor, dan kompor adalah penyebab utama terjadinya polusi udara.  Polutan yang dikeluarkan biasanya dikelompokan menjadi  hidrokarbon (HC, nitrogen oksida (NOx, dan  karbon monoksida (CO. Polutan yang dihasilkan pada pembakaran fosil merupakan faktor terbesar terjadinya asap, hujan asam,  pemanasan global dan perubahan iklim.   The conversion of energy from one form to another often affects the environment and the air we breath in many ways. Pollutants are emitted as the chemical energy in fossil fuels is converten to thermal, mechanical, or electrical energy via combustion, and thus power plants, motor vehicles, and even stoves take the blame for air pollution, and  the pollutants released by the vehicles are usually grouped as hydrocarbons (HC, nitrogen oxides (NOx, and carbon monoxide (CO. Pollutans emitted during the combustion of fossil fuels are responsible for smog, acid rain, and global warming and climate change.

  19. Isolasi dan Karakterisasi Ralstonia syzygii

    Directory of Open Access Journals (Sweden)

    Yanuar Danaatmadja

    2009-07-01

    Full Text Available Ralstonia syzygii is one of important pathogens of cloves. This study was aimed at obtaining pure culture of R. syzygi from diseased plant tissue samples. The acterium was isolated from infected clove plantations in Ungaran, Central Java. It had the ability to make clove seedlings show symptoms and then die 41 days after inoculation. The reisolated bacterium also showed its ability to kill clove seedlings after 17 days. The bacterium is gram negative, able to ultilize glucose, sucrose, maltose, mannitol, sorbitol, dulcitol, and glycerol, able to hydrolyze starch, grow well at 27oC, able to catalyze and release water and oxygen from hydrogen peroxyde (H2O2 and aerobically.   Ralstonia syzygii merupakan salah satu patogen penting pada tanaman cengkeh. Penelitian ini dilakukan untuk mendapakan isolat murni R syzygii dari jaringan tanaman terinfeksi. Bakteri diisolasi dari pertanaman cengkeh sakit yang berasal dari daerah Ungaran, Jawa Tengah. Bakteri menunjukkan kemampuan untuk menyebabkan bibit tanaman cangkeh sakit dan kemudian mati 41 hsi. Bakteri hasil reisolasi juga menunjukkan kemampuannya menyebabkan sakit dan kematian pada bibit tanaman cengkeh setelah 17 hsi. Bakteri yang diperoleh bersifat gram negatif, mampu memanfaatkan glukosa, sukrosa, maltosa, manitol, sorbitol, dulsitol, dan gliserol, mampu menghidrolisis pati, tumbuh baik pada suhu 27o C, mampu mengkatalisis dan melepaskan air dan oksigen dari hydrogen peroxide (H2O2 dan bersifat aerob.

  20. Array of titanium dioxide nanostructures for solar energy utilization

    Science.gov (United States)

    Qiu, Xiaofeng; Parans Paranthaman, Mariappan; Chi, Miaofang; Ivanov, Ilia N; Zhang, Zhenyu

    2014-12-30

    An array of titanium dioxide nanostructures for solar energy utilization includes a plurality of nanotubes, each nanotube including an outer layer coaxial with an inner layer, where the inner layer comprises p-type titanium dioxide and the outer layer comprises n-type titanium dioxide. An interface between the inner layer and the outer layer defines a p-n junction.

  1. Method for synthesis of titanium dioxide nanotubes using ionic liquids

    Science.gov (United States)

    Qu, Jun; Luo, Huimin; Dai, Sheng

    2013-11-19

    The invention is directed to a method for producing titanium dioxide nanotubes, the method comprising anodizing titanium metal in contact with an electrolytic medium containing an ionic liquid. The invention is also directed to the resulting titanium dioxide nanotubes, as well as devices incorporating the nanotubes, such as photovoltaic devices, hydrogen generation devices, and hydrogen detection devices.

  2. Spectroscopy and titanium gettering in SPHEX

    International Nuclear Information System (INIS)

    Cunningham, G.; Giroud, C.; Summers, H.; Commission of the European Communities, Abingdon

    1994-01-01

    SPHEX is a spheromak wherein the toroidal and poloidal currents are generated and sustained by direct current injection from a Marshall gun, and organised by the effect of magnetic relaxation. In the past it has not achieved high temperature (Langmuir probes indicate a flat profile of about 20 eV), and this was thought to be due to radiation from impurities originating in the Marshall gun. For this paper, titanium has been applied to the plasma-facing surface of the flux conserver in an attempt to reduce impurity levels and plasma density. Calibrated spectrometers were used to measure plasma properties and impurity levels, both before and after application of titanium. The titanium is also found to have a surprisingly large effect on the magnetic properties, which gives some evidence regarding the relaxation mechanism. 7 refs., 2 figs., 1 tab

  3. Reaction of titanium polonides with carbon dioxide

    International Nuclear Information System (INIS)

    Abakumov, A.S.; Malyshev, M.L.; Reznikova, N.F.

    1987-01-01

    It has been ascertained that heating titanium and tantalum in carbon dioxide to temperatures of 500 or 800 0 C alters the composition of the gas phase, causing the advent of carbon monoxide and lowering the oxygen content. Investigation of the thermal stability of titanium polonides in a carbon dioxide medium has shown that titanium mono- and hemipolonides are decomposed at temperatures below 350 0 C. The temperature dependence of the vapor pressure of polonium produced in the decomposition of these polonides in a carbon dioxide medium have been determined by a radiotensimetric method. The enthalpy of the process, calculated from this relationship, is close to the enthalpy of vaporization of elementary polonium in vacuo

  4. Environmental effects in titanium aluminide alloys

    International Nuclear Information System (INIS)

    Thompson, A.W.

    1991-01-01

    Environmental effects on titanium aluminide alloys are potentially of great importance for engineering applications of these materials, although little has been published to date on such effects. The primary emphasis in this paper is on hydrogen effects, with a brief reference to oxygen effects. Hydrogen is readily absorbed at elevated temperature into all the titanium aluminide compositions studied to date, in amounts as large as 10 at.%, and on cooling virtually all this hydrogen is precipitated as a hydride phase or phases. The presence of these precipitated hydride plates affects mechanical properties in ways similar to what is observed in other hydride forming materials, although effects per unit volume of hydride are not particularly severe in the titanium aluminides. Microstructure, and thus thermal and mechanical history, plays a major role in controlling the severity of hydrogen effects

  5. Enthalpy of formation of titanium diboride

    International Nuclear Information System (INIS)

    Akhachinskij, V.V.; Chirin, N.A.

    1975-01-01

    The values given in the literature for the enthalpy of the formation of titanium diboride, as obtained experimentally and by theoretical estimation, range between -32 and -74.4 kcal/mol. In this paper the authors use the method of direct synthesis from elements in a Calvet calorimeter to determine the enthalpy of formation, ΔHsub(f) 0 , sub(298), of titanium diboride with the composition Tisub(1.000+-0.002)Bsub(2.056+-0.006)Csub(0.009)Nsub(0.003), which was found to be -76.78+-0.83 kcal/mol. They calculate that ΔHsub(f,298) (TiBsub(2.056)=-76.14+-0.85 kcal/mol. The procedure employed makes it possible to carry out the titanium diboride synthesis reaction with the calorimeter at room temperature

  6. Stainless Steel to Titanium Bimetallic Transitions

    Energy Technology Data Exchange (ETDEWEB)

    Kaluzny, J. A. [Fermilab; Grimm, C. [Fermilab; Passarelli, D. [Fermilab

    2015-01-01

    In order to use stainless steel piping in an LCLS-II (Linac Coherent Light Source Upgrade) cryomodule, stainless steel to titanium bimetallic transitions are needed to connect the stainless steel piping to the titanium cavity helium vessel. Explosion bonded stainless steel to titanium transition pieces and bimetallic transition material samples have been tested. A sample transition tube was subjected to tests and x-ray examinations between tests. Samples of the bonded joint material were impact and tensile tested at room temperature as well as liquid helium temperature. The joint has been used successfully in horizontal tests of LCLS-II cavity helium vessels and is planned to be used in LCLS-II cryomodules. Results of material sample and transition tube tests will be presented.

  7. Laser induced single spot oxidation of titanium

    Energy Technology Data Exchange (ETDEWEB)

    Jwad, Tahseen, E-mail: taj355@bham.ac.uk; Deng, Sunan; Butt, Haider; Dimov, S.

    2016-11-30

    Highlights: • A new high resolution laser induced oxidation (colouring) method is proposed (single spot oxidation). • The method is applied to control oxide films thicknesses and hence colours on titanium substrates in micro-scale. • The method enable imprinting high resolution coloured image on Ti substrate. • Optical and morphological periodic surface structures are also produced by an array of oxide spots using the proposed method. • Colour coding of two colours into one field is presented. - Abstract: Titanium oxides have a wide range of applications in industry, and they can be formed on pure titanium using different methods. Laser-induced oxidation is one of the most reliable methods due to its controllability and selectivity. Colour marking is one of the main applications of the oxidation process. However, the colourizing process based on laser scanning strategies is limited by the relative large processing area in comparison to the beam size. Single spot oxidation of titanium substrates is proposed in this research in order to increase the resolution of the processed area and also to address the requirements of potential new applications. The method is applied to produce oxide films with different thicknesses and hence colours on titanium substrates. High resolution colour image is imprinted on a sheet of pure titanium by converting its pixels’ colours into laser parameter settings. Optical and morphological periodic surface structures are also produced by an array of oxide spots and then analysed. Two colours have been coded into one field and the dependencies of the reflected colours on incident and azimuthal angles of the light are discussed. The findings are of interest to a range of application areas, as they can be used to imprint optical devices such as diffusers and Fresnel lenses on metallic surfaces as well as for colour marking.

  8. Laser induced single spot oxidation of titanium

    International Nuclear Information System (INIS)

    Jwad, Tahseen; Deng, Sunan; Butt, Haider; Dimov, S.

    2016-01-01

    Highlights: • A new high resolution laser induced oxidation (colouring) method is proposed (single spot oxidation). • The method is applied to control oxide films thicknesses and hence colours on titanium substrates in micro-scale. • The method enable imprinting high resolution coloured image on Ti substrate. • Optical and morphological periodic surface structures are also produced by an array of oxide spots using the proposed method. • Colour coding of two colours into one field is presented. - Abstract: Titanium oxides have a wide range of applications in industry, and they can be formed on pure titanium using different methods. Laser-induced oxidation is one of the most reliable methods due to its controllability and selectivity. Colour marking is one of the main applications of the oxidation process. However, the colourizing process based on laser scanning strategies is limited by the relative large processing area in comparison to the beam size. Single spot oxidation of titanium substrates is proposed in this research in order to increase the resolution of the processed area and also to address the requirements of potential new applications. The method is applied to produce oxide films with different thicknesses and hence colours on titanium substrates. High resolution colour image is imprinted on a sheet of pure titanium by converting its pixels’ colours into laser parameter settings. Optical and morphological periodic surface structures are also produced by an array of oxide spots and then analysed. Two colours have been coded into one field and the dependencies of the reflected colours on incident and azimuthal angles of the light are discussed. The findings are of interest to a range of application areas, as they can be used to imprint optical devices such as diffusers and Fresnel lenses on metallic surfaces as well as for colour marking.

  9. Titanium Isotopes Provide Clues to Lunar Origin

    Science.gov (United States)

    Taylor, G. J.

    2012-05-01

    The idea that the Moon formed as the result of the giant impact of a Mars-sized impactor with the still-growing Earth explains two central facts about the Earth-Moon system: its total angular momentum (Earth's spin and the Moon's orbital motion), and the sizes of the metallic cores of the Earth (large) and Moon (tiny). This gives cosmochemists some confidence in the hypothesis, but they would greatly appreciate additional compositional tests. One undisputed point is the identical abundance of the three oxygen isotopes in Earth and Moon. Junjun Zhang and colleagues at the University of Chicago (USA) and the University of Bern (Switzerland) have added another isotopic system to the cosmochemical testing tool kit, titanium isotopes. They find that the ratio of titanium-50 to titanium-47 is identical in Earth and Moon to within four parts per million. In contrast, other solar system materials, such as carbonaceous chondrites, vary by considerably more than this-- up to 150 times as much. The identical oxygen and titanium isotopic compositions in Earth and Moon are surprising in light of what we think we know about planet formation and formation of the Moon after a giant impact. The variations in oxygen and titanium isotopes among meteorite types suggest that it is unlikely that the Moon-forming giant impactor would have had the same isotopic composition as the Earth. Simulations show that the Moon ends up constructed mostly (40-75%) from the impactor materials. Thus, the Moon ought to have different isotopic composition than does Earth. The isotopes might have exchanged in the complicated, messy proto-lunar disk (as has been suggested for oxygen isotopes), making them the same. However, Zhang and colleagues suggest that this exchange is unlikely for a refractory element like titanium. Could the impact simulations be greatly overestimating the contributions from the impactor? Was the mixing of building-block materials throughout the inner solar system much less than

  10. Creating mobile apps with Appcelerator Titanium

    CERN Document Server

    Brousseau, Christian

    2013-01-01

    Creating Mobile Apps with Appcelerator Titanium provides a hands-on approach and working examples on creating apps and games as well as embedding them onto a social networking website. Developers can then move on from there to develop their own applications based on the ones they have developed throughout the course of this book.""Creating Mobile Apps with Appcelerator Titanium"" is for developers who have experience with modern languages and development environments. Also, if you are familiar with the concepts of Object-oriented Programming (OOP), reusable components, AJAX closures, and so on

  11. Nickel and titanium nanoboride composite coating

    International Nuclear Information System (INIS)

    Efimova, K A; Galevsky, G V; Rudneva, V V; Kozyrev, N A; Orshanskaya, E G

    2015-01-01

    Electrodeposition conditions, structural-physical and mechanical properties (microhardness, cohesion with a base, wear resistance, corrosion currents) of electroplated composite coatings on the base of nickel with nano and micro-powders of titanium boride are investigated. It has been found out that electro-crystallization of nickel with boride nanoparticles is the cause of coating formation with structural fragments of small sizes, low porosity and improved physical and mechanical properties. Titanium nano-boride is a component of composite coating, as well as an effective modifier of nickel matrix. Nano-boride of the electrolyte improves efficiency of the latter due to increased permissible upper limit of the cathodic current density. (paper)

  12. The Properties of Titanium and Its Alloys

    OpenAIRE

    BIŠĆAN, VLATKA; LUETIĆ, VIKTORIJA

    2012-01-01

    Titanium metal is silver-grey color and high gloss, the ninth element of the abundance in the Earth’s crust, and can be found in meteorites. It has a low electrical conductivity and low coefficient of thermal expansion. Since titanium has a great passivity, its physical property is a high level of corrosion resistance to most mineral acids and chlorides. It has mechanical properties such as steel, has a high melting temperature and is light. Since it is highly resistant to corrosion it is app...

  13. Nickel contaminated titanium weld wire study

    International Nuclear Information System (INIS)

    Coffin, G.R.; Sumstine, R.L.

    1979-01-01

    Attachment of thermocouples to fuel rod welding problems at Exxon Nuclear Company and INEL prompted an investigation study of the titanium filler wire material. It was found that the titanium filler wire was contaminated with nickel which was jacketed on the wire prior to the drawing process at the manufacturers. A method was developed to 100% inspect all filler wire for future welding application. This method not only indicates the presence of nickel contamination but indicates quantity of contamination. The process is capable of high speed inspection necessary for various high speed manufacturing processes

  14. Local heating with titanium nitride nanoparticles

    DEFF Research Database (Denmark)

    Guler, Urcan; Ndukaife, Justus C.; Naik, Gururaj V.

    2013-01-01

    We investigate the feasibility of titanium nitride (TiN) nanoparticles as local heat sources in the near infrared region, focusing on biological window. Experiments and simulations provide promising results for TiN, which is known to be bio-compatible.......We investigate the feasibility of titanium nitride (TiN) nanoparticles as local heat sources in the near infrared region, focusing on biological window. Experiments and simulations provide promising results for TiN, which is known to be bio-compatible....

  15. Phased Array Ultrasonic Inspection of Titanium Forgings

    International Nuclear Information System (INIS)

    Howard, P.; Klaassen, R.; Kurkcu, N.; Barshinger, J.; Chalek, C.; Nieters, E.; Sun, Zongqi; Fromont, F. de

    2007-01-01

    Aerospace forging inspections typically use multiple, subsurface-focused sound beams in combination with digital C-scan image acquisition and display. Traditionally, forging inspections have been implemented using multiple single element, fixed focused transducers. Recent advances in phased array technology have made it possible to perform an equivalent inspection using a single phased array transducer. General Electric has developed a system to perform titanium forging inspection based on medical phased array technology and advanced image processing techniques. The components of that system and system performance for titanium inspection will be discussed

  16. 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.

  17. Penskalaan Butir Format Respons Pilihan dan Respons Bebas Berdasarkan Model Rasch dan Partial Credit

    OpenAIRE

    Eko Hariadi

    2007-01-01

    Penelitian melihat pengaruh jumlah parameter butir, kategori respons bebas (RB), pengaruh sampel terhadap akurasi estimasi parameter kemampuan untuk menghasilkan estimasi yang stabil dan pengaruh pembobotan butir RP dan butir RB terhadap kesalahan baku. Penelitian dalam dua tahap, simulasi menggunakan 30 kondisi dengan replikasi 50 dengan variabel panjang tes, jumlah kategori, dan jumlah parameter butir, dan analisis deskriptif, dilanjutkan penerapan penskalaan gabungan butir tipe res...

  18. Metode Sederhana dan Efektif untuk Penghitungan dan Visualisasi Tiga Dimensi (3D) Biofilm Vibriio Cholera

    OpenAIRE

    Kurniawan, Andi; Fadjar, Mohamad; Sukoso, Sukoso; Prihanto, Asep Awaludin

    2015-01-01

    Mikroorganisme yang mampu menghasilkan biofim menimbulkan masalah yang serius dalam bidang kesehatan dan pangan. Penelitian biofim bagi sebagian peneliti sangat identik dengan kerumitan proses penghitungan dan visualisasi penutupan permukaan substrat penempelan bakteri. Penelitian ini ditujukan untuk mengetahui efiiensi metode alternatif untuk menghitung dan memvisualisasikan biofimVibrio cholera. Pada penelitian ini beberapa faktor lingkungan seperti pH, suhu, dan kondisi kultur diujicobakan...

  19. Direct dynamic synthesis of nanodispersed phases of titanium oxides upon sputtering of electrodischarge titanium plasma into an air atmosphere

    Science.gov (United States)

    Sivkov, A. A.; Gerasimov, D. Yu.; Nikitin, D. S.

    2017-01-01

    Experimental investigations of the possibility of directly synthesizing nanodispersed crystalline phases of titanium dioxides with rutile and anatase structures in a hypervelocity jet of electroerosion plasma generated by a coaxial magnetoplasma accelerator with titanium electrodes are presented. A powder product containing nanosized polymorphic phases of titanium dioxide with a spherical shape of particles has been manufactured.

  20. Hydrogen embrittlement of titanium and its alloys - a literature review

    International Nuclear Information System (INIS)

    Aho-Mantila, I.; Haemaelaeinen, H.

    1986-05-01

    Hydrogen embrittlement data of titanium and its alloys is reviewed. Especially the results obtained in spent nuclear fuel repository conditions with commercially pure titanium and TiCode-12 alloy are examined. The results show that the mechanical properties of titanium are not much affected by hydrogen when tested by smooth specimens. Much greater effects can be expected with notched fracture mechanics specimens. However, only limeted data is available. Hydrogen distribution in titanium is affected by stress, alloy composition and temperature gradients. In order to model the hydrogen-induced crack growth in titanium much more mechanistic work is needed especially to understand the behaviour of hydrogen in crack tip stress field. (author)

  1. Structure and properties of Titanium for dental implants

    Directory of Open Access Journals (Sweden)

    M. Greger

    2009-10-01

    Full Text Available This paper describes manufacture of nano-structural titanium, its structure and properties. Nano-titanium has higher specific strength properties than ordinary (coarse-grained titanium. Nano-titanium was produced by the equal-channel angular pressing (ETAP process. The research it self was focused on physical base of strengthening and softening processes and developments occurring at the grain boundaries during the ECAP process at half-hot temperature. Strength of nano-titanium varies around 960 MPa, grain size around 300 nm.

  2. Rough surfaces of titanium and titanium alloys for implants and prostheses

    International Nuclear Information System (INIS)

    Conforto, E.; Aronsson, B.-O.; Salito, A.; Crestou, C.; Caillard, D.

    2004-01-01

    Titanium and titanium alloys for dental implants and hip prostheses were surface-treated and/or covered by metallic or ceramic rough layers after being submitted to sand blasting. The goal of these treatments is to improve the surface roughness and consequently the osteointegration, the fixation, and the stability of the implant. The microstructure of titanium and titanium alloys submitted to these treatments has been studied and correlated to their mechanical behavior. As-treated/covered and mechanically tested surfaces were characterized by scanning electron microscopy (SEM). Structural analyses performed by transmission electron microscopy (TEM), mainly in cross-section, reveal the degree of adherence and cohesion between the surface layer and the substrate (implant). We observed that, although the same convenient surface roughness was obtained with the two types of process, many characteristics as structural properties and mechanical behavior are very different

  3. Rapid PMR determination of hydrogen in titanium hydride and dehydrogenated titanium powders

    International Nuclear Information System (INIS)

    Il'enko, V.S.; Demidenko, L.M.

    1987-01-01

    Proton magnetic resonance (PMR) enables determining hydrogen quantitatively in titanium hydride and dehydrogenated titanium powders without destroying the specimen and is also more informative than high-temperature extraction methods. PMR provides data on the electron-nuclear interactions and the activation energies for hydrogen diffusion while also providing conclusions on the forms and positives of the hydrogen in the lattice and the binding to the metal atoms. The authors have developed a rapid method for determining hydrogen in titanium hydride and dehydrogenated titanium powders which reduces the analysis time and improves the metrological characteristics. The authors use a YaMR-5535 spectrometer working at 40 MHz upgraded for use with hydrogen in solids. The authors used specimens of mass about 2 g ground to 0.1 mm powder

  4. Hidroxyapatite Coating on CoCrMo Alloy Titanium Nitride Coated Using Biomimetic Method

    International Nuclear Information System (INIS)

    Charlena; Sukaryo, S.G.; Fajar, M.

    2016-01-01

    Bone implants is a way to cure broken bones which is being developed. The implants can be made of metals, ceramics and polymers. Metallic materials commonly used are titanium (Ti), stainless steel, and metal alloys. This study used Co-based alloys, i.e. CoCrMo coated with titanium nitride (TiN) which was then coated on hidroxyapatite (HAp). The HAp coating on the surface of CoCrMo alloy was done by biomimetic methods, first by soaking the metal alloys in simulated body fluid (SBF) solution for 18, 24, and 36 hours. The immersion in the SBF solution produced white coat on the surface of the metal alloy. The layers formed were analyzed by scanning electron microscope (SEM) and characterized by x-ray diffractometer (XRD). Based on the SEM results of 36 hours treatment, the morphology of apatite crystal formed fine grains. According to XRD result, there were HAp peaks at angles 2θ 31.86, 32.25, dan 39.48. However, there were also CaCO 3 peaks at angles 2θ 29.46, 36.04, and 46.79. It indicated the pure HAp is not yet formed. (paper)

  5. Hidroxyapatite Coating on CoCrMo Alloy Titanium Nitride Coated Using Biomimetic Method

    Science.gov (United States)

    Charlena; Sukaryo, S. G.; Fajar, M.

    2016-11-01

    Bone implants is a way to cure broken bones which is being developed. The implants can be made of metals, ceramics and polymers. Metallic materials commonly used are titanium (Ti), stainless steel, and metal alloys. This study used Co-based alloys, i.e. CoCrMo coated with titanium nitride (TiN) which was then coated on hidroxyapatite (HAp). The HAp coating on the surface of CoCrMo alloy was done by biomimetic methods, first by soaking the metal alloys in simulated body fluid (SBF) solution for 18, 24, and 36 hours. The immersion in the SBF solution produced white coat on the surface of the metal alloy. The layers formed were analyzed by scanning electron microscope (SEM) and characterized by x-ray diffractometer (XRD). Based on the SEM results of 36 hours treatment, the morphology of apatite crystal formed fine grains. According to XRD result, there were HAp peaks at angles 2θ 31.86, 32.25, dan 39.48. However, there were also CaCO3 peaks at angles 2θ 29.46, 36.04, and 46.79. It indicated the pure HAp is not yet formed.

  6. Purwarupa Sistem Integrasi Quadcopter dan Mobile Robot

    OpenAIRE

    Dharmawan, Andi; Lusiarta Putera, Christian Antonia

    2012-01-01

    AbstrakQuadcopter, juga dikenal sebagai quadrotor, adalah helikopter dengan empat motor yang dilengkapi dengan  empat buah propeller pada masing-masing motornya yang digunakan untuk terbang dan bermanuver. Pada quadcopter terdapat 3 variabel sudut yang menjadi element utama dalam pengendaliannya yaitu roll, pitch, dan yaw yang diperoleh dari penggabungan sensor accelerometer, gyroscope dan magnetometer dengan metode Direction Cosine Matrix. Pada sistem integrasi mobile robot dan quadcopter, d...

  7. Review Dendrimer : Definisi, Sintesis, Aplikasi Dan Prospektif

    OpenAIRE

    Rahmi, Dwinna

    2013-01-01

    Dendrimer merupakan makrostruktur monodisperse dengan banyak cabang yang homogen dan degree of branching (DB) 100%. Dua cara sintesis dendrimer yaitu convergent dan divergent dilakukan. Convergent dilakukan dengan reaksi kovalen antara dua dan lebih monomer. Divergent dimulai dengan pembentukan inti dilanjutkan dengan pembentukan cabang yang merupakan group fungsional yang aktif. Sejauh ini dendrimer sudah banyak diterapkan pada bidang farmasi yaitu drug delivery dan non farmasi pada proses i...

  8. Rancang Bangun Aplikasi Enkripsi dan Dekripsi Email Dengan Menggunakan Algoritma Advanced Encryption Standard Dan Knapsack

    Directory of Open Access Journals (Sweden)

    Timothy John Pattiasina

    2014-07-01

    Full Text Available Advanced Encryption Standard (AES dan Knapsack adalah dua algoritma enkripsi simetris dan asimetris yang paling sering digunakan. Penelitian ini menganalisa kedua algoritma AES dan algoritma Knapsack. Prototipe aplikasi enkripsi email ini dirancang dengan menggabungkan karateristik algoritma AES dan Knapsack untuk memecahkan masalah keamanan email. Algoritma AES digunakan untuk mengenkripsi dan deskripsi email berupa teks atau file, sedangkan Algoritma Knapsack di gunakan untuk mengenkripsi kunci AES. Enkripsi hybrid yang diterapkan pada aplikasi bertujuan untuk menambah keamanan informasi dalam sebuah jaringan.

  9. Titanium Metal Powder Production by the Plasma Quench Process

    Energy Technology Data Exchange (ETDEWEB)

    R. A. Cordes; A. Donaldson

    2000-09-01

    The goals of this project included the scale-up of the titanium hydride production process to a production rate of 50 kg/hr at a purity level of 99+%. This goal was to be achieved by incrementally increasing the production capability of a series of reactor systems. This methodic approach was designed to allow Idaho Titanium Technologies to systematically address the engineering issues associated with plasma system performance, and powder collection system design and performance. With quality powder available, actual fabrication with the titanium hydride was to be pursued. Finally, with a successful titanium production system in place, the production of titanium aluminide was to be pursued by the simultaneously injection of titanium and aluminum precursors into the reactor system. Some significant accomplishments of the project are: A unique and revolutionary torch/reactor capable of withstanding temperatures up to 5000 C with high thermal efficiency has been operated. The dissociation of titanium tetrachloride into titanium powder and HC1 has been demonstrated, and a one-megawatt reactor potentially capable of producing 100 pounds per hour has been built, but not yet operated at the powder level. The removal of residual subchlorides and adsorbed HC1 and the sintering of powder to form solid bodies have been demonstrated. The production system has been operated at production rates up to 40 pounds per hour. Subsequent to the end of the project, Idaho Titanium Technologies demonstrated that titanium hydride powder can indeed be sintered into solid titanium metal at 1500 C without sintering aids.

  10. Titanium electroplating of copper in molten salt media

    International Nuclear Information System (INIS)

    Renaud, Denis

    1985-01-01

    After a bibliographical survey on electroplating in molten salt media and on the electrolytic production of titanium, the author explains the reasons for the choice of the LiF-NaF-KF eutectic mix as solvent. He recalls the main properties which are used, and describes the conventional and convolutional processing of data obtained by linear volt-amperometry. He presents the electrolyte preparation mode which takes into account the existence of titanium ions with intermediate oxidation degree, and the reactivity of titanium with oxygenated species. Experimental results are discussed. Then, after the study of the mechanism of reduction of trivalent titanium into titanium on molybdenum (intermetallic diffusion is here negligible), he reports the study of this mechanism on copper (it is a more complicated situation, due to combinations between titanium and copper). The effect of different parameters (electrolyte purity, current density, electrode potential and temperature) is interpreted in order to identify optimal conditions for titanium electroplating of copper [fr

  11. KORELASI ANTARA ISLAM DAN EKONOMI

    Directory of Open Access Journals (Sweden)

    Akmal Zainal Abidin

    2015-03-01

    Full Text Available CORELATION BETWEEN ISLAM AND ECONOMY. This paper aims to identifies about the correlation between economic and Islam. Islam is the perfect religion that governs all things in life, including the economy. This is evident with the concept of  well-being which is described in the al-Quran and Sunnah. Basically the goal of every human life is to prosper, although humans make sense of  well- being with a different perspective. Most understand economics assume that welfare is the welfare of  earthly material. But to make sense of well-being with the term al-Falah, is meaning holistic wellbeing and balance between material and spiritual dimensions. al-Quran and Sunnah have taught that the human being will be achieved if  living in balance between material and spiritual. This is because human life does not just stop in the life of this world, but there is still a second life that will be faced by humanity in the hereafter, and well-being will be achieved with the truth is that people can balance the needs of the world and the hereafter, and that is what is taught in Islamic economics. Keywords: Islam, Economy, Prosperity. Tulisan ini bertujuan untuk menjelasakn tentang korelasi antara ekonomi  dan  Islam.  Islam  adalah  agama  yang  sempurna  yang mengatur segala hal dalam kehidupan ini, termasuk juga ekonomi. Hal ini terbukti dengan konsep kesejahteraan yang dipaparkan dalam al-Quran dan Sunnah. Pada dasarnya tujuan hidup setiap manusia adalah untuk mencapai kesejahteraan, meskipun manusia memaknai kesejahteraan dengan perspektif  yang berbeda-beda. Sebagian besar paham ekonomi menganggap bahwa kesejahteraan adalah kesejahteraan material duniawi. Namun Islam memaknai kesejahteraan dengan istilah  Falah  yang  berarti  kesejahteraan  holistik  dan  seimbang antara dimensi material dan spiritual. Al-Quran dan Sunnah telah mengajarkan bahwa kesejahteraan akan tercapai jika manusia menjalani hidup secara seimbang antara material dan

  12. SHORT COMMUNICATION TITANIUM-INDUCED SYNTHESIS OF ...

    African Journals Online (AJOL)

    Preferred Customer

    acyclic alkenes and intramolecular pathway on dicarbonyl compounds to yield ... Table 1, substituted benzofurans 2a-g were obtained in good yield and in the .... The titanium-induced synthesis of benzofurans has proved to be the method of ...

  13. Electrochemical surface modification of titanium in dentistry.

    Science.gov (United States)

    Kim, Kyo-Han; Ramaswamy, Narayanan

    2009-01-01

    Titanium and its alloys have good biocompatibility with body cells and tissues and are widely used for implant applications. However, clinical procedures place more stringent and tough requirements on the titanium surface necessitating artificial surface treatments. Among the many methods of titanium surface modification, electrochemical techniques are simple and cheap. Anodic oxidation is the anodic electrochemical technique while electrophoretic and cathodic depositions are the cathodic electrochemical techniques. By anodic oxidation it is possible to obtain desired roughness, porosity and chemical composition of the oxide. Anodic oxidation at high voltages can improve the crystallinity of the oxide. The chief advantage of this technique is doping of the coating of the bath constituents and incorporation of these elements improves the properties of the oxide. Electrophoretic deposition uses hydroxyapatite (HA) powders dispersed in a suitable solvent at a particular pH. Under these operating conditions these particles acquire positive charge and coatings are obtained on the cathodic titanium by applying an external electric field. These coatings require a post-sintering treatment to improve the coating properties. Cathodic deposition is another type of electrochemical method where HA is formed in situ from an electrolyte containing calcium and phosphate ions. It is also possible to alter structure and/or chemistry of the obtained deposit. Nano-grained HA has higher surface energy and greater biological activity and therefore emphasis is being laid to produce these coatings by cathodic deposition.

  14. Manufacture of titanium and zirconium hydrides

    International Nuclear Information System (INIS)

    Mares, F.; Hanslik, T.

    1973-01-01

    A method is described of manufacturing titanium and zirconium hydrides by hydrogenation of said metals characterized by the reaction temperature ranging between 250 to 500 degC, hydrogen pressure of 20 to 300 atm and possibly by the presence of a hydride of the respective metal. (V.V.)

  15. Titanium impregnated borosilicate zeolites for epoxidation catalysis

    Czech Academy of Sciences Publication Activity Database

    Přech, Jan; Vitvarová, Dana; Lupínková, Lenka; Kubů, Martin; Čejka, Jiří

    2015-01-01

    Roč. 212, AUG 2015 (2015), s. 28-34 ISSN 1387-1811 R&D Projects: GA ČR GAP106/11/0819 Institutional support: RVO:61388955 Keywords : borosilicate * titanium impregnation * epoxidation Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 3.349, year: 2015

  16. Challenges of titanium metal injection moulding

    CSIR Research Space (South Africa)

    Benson, JM

    2007-11-01

    Full Text Available Titanium has fired the imagination of engineers and designers for decades by its ‘ideal’ combination of high strength, low density and good corrosion resistance. However, its application has unfortunately been limited to those niche markets where...

  17. Evaluating the Johanson theory for titanium powder

    CSIR Research Space (South Africa)

    Chikosha, S

    2015-05-01

    Full Text Available . In this study, the Johanson theory was used to determine the rolling parameters of titanium powder. Preliminary results of the nip angle, nip pressures and maximum horizontal pressures of the mill for the powder rolled on a 55mm diameter roll with roll gap sizes...

  18. Super titanium blades for advanced steam turbines

    International Nuclear Information System (INIS)

    Coulon, P.A.

    1990-01-01

    In 1986, the Alsthom Steam Turbines Department launched the manufacture of large titanium alloy blades: airfoil length of 1360 mm and overall length of 1520 mm. These blades are designed for the last-stage low pressure blading of advanced steam turbines operating at full speed (3000 rpm) and rating between 300 and 800 MW. Using titanium alloys for steam turbine exhaust stages as substitutes for chrome steels, due to their high strength/density ratio and their almost complete resistance to corrosion, makes it possible to increase the length of blades significantly and correspondingly that steam passage section (by up to 50%) with a still conservative stresses level in the rotor. Alsthom relies on 8 years of experience in the field of titanium, since as early as 1979 large titanium blades (airfoil length of 1240 mm, overall length of 1430 mm) were erected for experimental purposes on the last stage of a 900 MW unit of the Dampierre-sur-Loire power plant and now totals 45,000 operating hours without problems. The paper summarizes the main properties (chemical, mechanical and structural) recorded on very large blades and is based in particular on numerous fatigue corrosion test results to justify the use of the Ti 6 Al 4 V alloy in a specific context of micrographic structure

  19. Thermochemically active iron titanium oxide materials

    Energy Technology Data Exchange (ETDEWEB)

    Coker, Eric Nicholas; Miller, James E.

    2018-01-16

    A thermal oxidation-reduction cycle is disclosed that uses iron titanium oxide as the reactive material. The cycle may be used for the thermal splitting of water and/or carbon dioxide to form hydrogen and/or carbon monoxide. The formed compounds may be used as syngas precursors to form fuels.

  20. Obtention of titanium and zirconium metallic

    International Nuclear Information System (INIS)

    Santos, P.R.G.; Rover, C.F.S.; Amaral, F.L.L.

    1988-01-01

    The development works of techniques and equipments for titanium and zirconium sponges obtention are mentioned. The Kroll Process used for the sponges production is described, consisting in the reduction of the metal tetracloride with magnesium in an inert atmosphere of helium or argon. (C.G.C.) [pt

  1. Karakteristik Dan Spektrum Manajemen Pendidikan Islam

    OpenAIRE

    Jannah, Siti Raudhatul

    2013-01-01

    Artikel ini mendiskusikan mengenai manajemen pendidikan Islam, karakteristik, dan spektrumnya. Karakteristik manajemen pendidikan Islam harus didasarkan pada al-Qur'an dan Hadits serta pemikiran rasional yang telah diuji validitasnya. Spektrum manajemen pendidikan Islam meliputi lingkup manajemen personalia pendidikan Islam, manajemen peserta didik pendidikan Islam, maanjemen kurikulum pendidikan Islam, manajemen keuangan pendidikan Islam, manajemen sarana dan prasarana pendidikan Islam, mana...

  2. PRODUKSI NANOFIBER DAN APLIKASINYA DALAM PENGOLAHAN AIR

    OpenAIRE

    Krisnandika, Vania Elita

    2017-01-01

    Abstrak Kebutuhan air meningkat seiring meningkatnya jumlah penduduk dan taraf kehidupan masyarakat. Pembangunan yang dilakukan secara terus-menerus dan sangat cepat di Indonesia mengakibatkan penurunan kualitas air permukaan. Teknologi membran merupakan salah satu teknologi pengolahan air yang menghasilkan produk dengan kualitas tinggi. Membran berstruktur nano, khususnya nanofiber, saat ini menjadi perhatian karena menjawab kebutuhan teknologi filtrasi yang efektif dan hemat biaya. Pr...

  3. Variasi Temperatur dan Waktu Tahan Kalsinasi terhadap Unjuk Kerja Semikonduktor TiO2 sebagai Dye Sensitized Solar Cell (DSSC dengan Dye dari Ekstrak Buah Naga Merah

    Directory of Open Access Journals (Sweden)

    Sahat M. R. Nadaek

    2012-09-01

    Full Text Available Salah satu energi alternatif yang mempunyai potensi sumber energi yang sangat besar untuk mencegah terjadinya krisis energi namun sering kali terabaikan adalah sinar matahari. Oleh karena itu, penelitian ini dilakukan untuk  menghasilkan prototype dalam mengkonversi energi cahaya matahari menjadi energi listrik. Dye Sensitized Solar Cell (DSSC telah difabrikasi dengan menggunakan serbuk Titanium Dioksida (TiO2 yang dilapisi ke kaca Indium Tin Oxide dan diberi variasi temperatur 350oC, 450oC, dan 550oC dengan waktu tahan kalsinasi 30 dan 60 menit yang kemudian disensitisasi ke dalam larutan dye ekstrak buah naga merah (Hylocereus polyrhizus. DSSC di-assembling dengan coating Pd/Au yang telah di-sputtering ke kaca Indium Tin Oxide yang selanjutnya ditetesi dengan larutan elektrolit. Kemudian lapisan TiO2 tersebut dikarakterisasi menggunakan uji (SEM dan (XRD. Luas permukaan aktif partikel diidentifikasi dengan menggunakan BET analyzer. Dari hasil XRD dapat diketahui struktur kristalnya tetragonal. Hasil SEM menunjukkan bahwa bentuk partikel TiO2 adalah spherical. Untuk luas permukaan aktif yang dihasilkan menunjukkan nilai yang berbanding lurus dengan kenaikan nilai kelistrikan DSSC buah naga. Dari uji kelistrikan didapatkan hasil optimum pada temperatur 550oC dan waktu tahan 60 menit dengan voltase 562 mV, kuat arus 0.307 mA, dan memiliki efisiensi sebesar 0.089%. Kata kunci: Dye ekstrak buah naga merah, dye sensitized solar cell, temperatur kalsinasi, TiO2, waktu tahan kalsinasi.

  4. DETEKSI DAN MANAJEMEN REFEEDING SYNDROME

    Directory of Open Access Journals (Sweden)

    Darmadi Darmadi

    2012-09-01

    Full Text Available AbstrakRefeeding syndrome (RFS dideskripsikan sebagai perubahan biokimiawi, manifestasi klinis dan komplikasi sebagai konsekuensi pemberian nutrisi pada pasien kurang gizi. Refeeding syndrome ini menyebabkan dampak buruk dan kematian. Sindroma ini lebih sering terjadi pada kelompok risiko. Refeeding syndrome merupakan suatu sindroma yang sering tak terdiagnosis oleh karena itu perlu peningkatan pengetahuan dan kesadaran dari tenaga medis untuk mengurangi morbiditas dan mortalitas dari RFS. Karena alasan tersebut ditulis tinjauan pustaka ini yang akan membahas mengenai patofisiologi, faktor risiko, manifestasi klinis, dan manajemennya.Kata kunci : refeeding syndrome, kurang gizi, hipofosfatemia, dukungan nutrisiAbstractRefeeding syndrome (RFS describel as biochemical changes, clinical manifestations, and complications that can occur as a consequence of feeding a malnourished individual. RFS can result in serious harm and death. RFS more commonly occurs in at-risk populations. Increased awareness amongst healthcare professionals is likely to reduce morbidity and mortality. This review examines the pathophysiology, risk factors, clinical manifestations, and management of RFS.Key word : refeeding syndrome, malnourished, hypophosphatemia, nutritional support

  5. Islam, Media, dan Politik : Sebuah Perdebatan dan Kontempelasi Nilai Berdemokrasi

    Directory of Open Access Journals (Sweden)

    Idil Akbar

    2016-10-01

    Full Text Available Infact, press or media is one of pilar democracy. Media in democracy is a public sphere to communi-cation and makes relation, and a same time as public arena to gain information. But, media also could not release from streotypes and tendency that usually bring of interest, either the owner or ideology. It is meaning media can not released from perspective distorsion, values bias and take a side. Media also effective to become propaganda instrument for a political interest and an ideology. It is seen like how media in US, for example, stereotype of Islam in discourses contradiction and glob-al interest opposition. Then, Islam dominantly identified as doctrine teaches radicalism, fundamen-talism and terorism. Thus, it is often be justification for US to operate the military mission in the name of democracy. Tak dipungkiri pers atau media menjadi salah satu pilar bagi demokrasi. Media dalam demokrasi adalah sebagai ruang bagi publik berkomunikasi dan berinteraksi, sekaligus sarana publik mem-peroleh informasi tentang banyak hal. Namun, media juga tak bisa dilepaskan dari stereotip dan kecenderungan-kecenderungan, yang biasanya membawa kepentingan, baik pemilik maupun ide-ologi. Media karenanya tak lepas dari distorsi perspektif, bias nilai dan berpihak. Media juga efektif menjadi alat propaganda bagi sebuah kepentingan politik dan ideologi, seperti bagaimana media di negara Amerika, misalnya, menstereotipkan Islam dalam analisis pertentangan wacana dan kepent-ingan global. Sehingga, dominan Islam diidentikkan dengan sematan sebagai ajaran yang mengajarkan radikalisme, fundamentalisme dan terorisme. Karenanya pula seringkali menjadi alasan pembenar bagi Amerika untuk menjalankan misi militer atas nama demokrasi.

  6. Resorbable versus titanium plates for orthognathic surgery.

    Science.gov (United States)

    Agnihotry, Anirudha; Fedorowicz, Zbys; Nasser, Mona; Gill, Karanjot S

    2017-10-04

    Recognition of some of the limitations of titanium plates and screws used for the fixation of bones has led to the development of plates manufactured from bioresorbable materials. Whilst resorbable plates appear to offer clinical advantages over metal plates in orthognathic surgery, concerns remain about the stability of fixation and the length of time required for their degradation and the possibility of foreign body reactions. This review compares the use of titanium versus bioresorbable plates in orthognathic surgery and is an update of the Cochrane Review first published in 2007. To compare the effects of bioresorbable fixation systems with titanium systems used during orthognathic surgery. Cochrane Oral Health's Information Specialist searched the following databases: Cochrane Oral Health's Trials Register (to 20 January 2017); the Cochrane Central Register of Controlled Trials (CENTRAL; 2016, Issue 11) in the Cochrane Library (searched 20 January 2017); MEDLINE Ovid (1946 to 20 January 2017); and Embase Ovid (1980 to 20 January 2017). We searched the US National Institutes of Health Ongoing Trials Register ClinicalTrials.gov (clinicaltrials.gov; searched 20 January 2017), and the World Health Organization International Clinical Trials Registry Platform (searched 20 January 2017) for ongoing trials. No restrictions were placed on the language or date of publication when searching the electronic databases. Randomised controlled trials comparing bioresorbable versus titanium fixation systems used for orthognathic surgery in adults. Two review authors independently screened the results of the electronic searches, extracted data and assessed the risk of bias of the included studies. We resolved disagreement by discussion. Clinical heterogeneity between the included trials precluded pooling of data, and only a descriptive summary is presented. This review included two trials, involving 103 participants, one comparing titanium with resorbable plates and screws and

  7. Musisi Sekuler dan Gerejawi

    Directory of Open Access Journals (Sweden)

    Benny Cristovel

    2007-12-01

    Full Text Available Menjadi seorang musisi tidak sekedar bermain musik atau menyanyi saja. Ada jenjang-jenjang yang akan dilewatidalam dunia musik, yang pada akhirnya setiap musisi dihadapkan kepada tanggung jawab dalam dunia tersebut. Di jaman ini, jika jenjang seorang musisi sudah tahap profesional, maka musik dan bisnis merupakan hal yang tidak terpisahkan. Jadi tidak heran jika ada banyak orang yang memimpikan untuk berkarier dalam bidang musik, bahkan telah men1adicita-cita sejak kecil.Jadi penting bagi musisi gerejawi benar-benar "mengkotakkan dirinya" terhadap persepsi yang dianut oleh musisi sekuler, bukan mencampurkannya. Hal ini sangat esensial, karena musisi gerejawi bukan melayani manusia melainkan oleh anugerah Tuhan dipercayakan pekerjaan ini. Dengan demikian pelayanan sebagai musisi gerejawi tidak tercemar oleh persepsi dari dunia musik sekuler. Selain itu musisi gerejawi dapat merefleksikan Tuhan yang disembahnya kepada dunia sekuler, karena tujuan dari semua yang dilakukannya adalah untuk kemuliaan nama Tuhan.

  8. Porous titanium bases for osteochondral tissue engineering

    Science.gov (United States)

    Nover, Adam B.; Lee, Stephanie L.; Georgescu, Maria S.; Howard, Daniel R.; Saunders, Reuben A.; Yu, William T.; Klein, Robert W.; Napolitano, Anthony P.; Ateshian, Gerard A.

    2015-01-01

    Tissue engineering of osteochondral grafts may offer a cell-based alternative to native allografts, which are in short supply. Previous studies promote the fabrication of grafts consisting of a viable cell-seeded hydrogel integrated atop a porous, bone-like metal. Advantages of the manufacturing process have led to the evaluation of porous titanium as the bone-like base material. Here, porous titanium was shown to support the growth of cartilage to produce native levels of Young’s modulus, using a clinically relevant cell source. Mechanical and biochemical properties were similar or higher for the osteochondral constructs compared to chondral-only controls. Further investigation into the mechanical influence of the base on the composite material suggests that underlying pores may decrease interstitial fluid pressurization and applied strains, which may be overcome by alterations to the base structure. Future studies aim to optimize titanium-based tissue engineered osteochondral constructs to best match the structural architecture and strength of native grafts. Statement of Significance The studies described in this manuscript follow up on previous studies from our lab pertaining to the fabrication of osteochondral grafts that consist of a bone-like porous metal and a chondrocyte-seeded hydrogel. Here, tissue engineered osteochondral grafts were cultured to native stiffness using adult chondrocytes, a clinically relevant cell source, and a porous titanium base, a material currently used in clinical implants. This porous titanium is manufactured via selective laser melting, offering the advantages of precise control over shape, pore size, and orientation. Additionally, this manuscript describes the mechanical influence of the porous base, which may have applicability to porous bases derived from other materials. PMID:26320541

  9. PENGELOLAAN ZAKAT OLEH NEGARA DAN SWASTA Studi Efektifitas dan Efisiensi Pengelolaan Zakat Oleh BAZ Dan LAZ Kota Madiun

    Directory of Open Access Journals (Sweden)

    Atik Abidah

    2010-12-01

    Full Text Available Abstraks: Keberadaan lembaga zakat di Indonesia yang diakui oleh perundang-undangan ada dua, yaitu Badan Amil Zakat (BAZ dan Lembaga Amil Zakat (LAZ. BAZ adalah lembaga zakat yang dikelola oleh pemerintah, sedangkan LAZ adalah lembaga yang dikelola oleh masyarakat. Artikel ini merupakan merupakan hasil penelitian lapangan dengan menggunakan pendekatan kualitatif. Data digali langsung dari BAZ Kota Madiun dan LAZ dalam hal ini ada 2 lembaga, yaitu Lembaga Manajemen Infaq (LMI dan Baitul Maal Hidayatullah (BMH. Hasil penelitian BAZ lebih efektif dibanding LAZ, karena BAZ di bawah naungan Pemerintah Kota Madiun dan didukung dengan kebijakan dalam menjalankan progam kerjanya. Sedangkan pada LAZ (LMI dan BMH karena sifatnya mandiri, maka segala sesuatunya akan efektif jika mereka bekerja keras, dan itulah yang selama ini dilakukan oleh LMI dan BMH, sehingga sampai saat ini mereka masih eksis.

  10. INTERAKSI DAN HARMONI UMAT BERAGAMA

    Directory of Open Access Journals (Sweden)

    Joko Tri Haryanto

    2012-05-01

    Masyarakat Singkawang adalah masyarakat yang terdiri atas berbagai kelompok suku bangsa dan agama. Secara historis, masyarakat Singkawang mampu mem­pertahankan harmoni antar agama. Model interaksi sosial yang bersifat asosiatif tampaknya potensial untuk mendukung harmoni di dalam masyarakat. Ber­dasarkan paradigma fungsional-struktural, masyarakat diasumsikan sebagai sistem organik yang memiliki huungan antar bagiannya untuk mempertahankan masyarakat. Interaksi sosial di dalam masyarakat Singkawang dikembangkan melalui interaksi di dalam lingkup keluarga, lingkungan sekitar, aktifitas ekonomi, para pimpinan agama, dan hubungan di dalam lingkup budaya dan tradisi. Meskipun demikian, hubungan antar unsur masyarakat masih kosmopolitan, yang di dalamnya anggota masyarakat kurang aktif dalam mengembangkan harmoni masyarakat.

  11. ETIKA BISNIS AL-GHAZALI DAN ADAM SMITH DALAM PERSPEKTIF ILMU BISNIS DAN EKONOMI

    Directory of Open Access Journals (Sweden)

    AM. M. Hafidz MS.

    2013-05-01

    Full Text Available Penelitian ini adalah untuk mengeksplorasi: (1 pembangunan etika bisnis yang telah dirumuskan oleh al-Ghazali dan Adam Smith, (2 persamaan dan perbedaan antara dua etika bisnis pria, dan (3 relevansi bisnis mereka etika bisnis modern dunia dan ekonomi. Bisnis etika dibangun oleh al-Ghazali dan Smith di dataran praksis tidak jauh berbeda. Etika bisnis konstruksi dibangun oleh al-Ghazali didasarkan pada prinsip-prinsip seperti orientasi itikad baik tentang dunia dan akhirat, kejujuran, kepentingan pribadi dan social keseimbangan, dan perilaku / perbuatan yang tepat. Di sisi lain, etika bisnis konstruksi dibangun oleh Smith, berdasarkan keadilan, altruisme, keadilan dan liberal (kebebasan ekonomi. Baik etika bisnis yang diperkenalkan oleh kedua sangat relevan untuk menjadi digunakan sebagai bahan pokok acuan dalam etika bisnis modern.

  12. Pengembangan Sistem Otomatisasi AC dan Lampu Menggunakan Fuzzy dan Raspberry Pi

    Directory of Open Access Journals (Sweden)

    Rudy Ariyanto

    2017-11-01

    Full Text Available Otomatisasi AC dan lampu dilakukan untuk menghemat energi yang digunakan pada kehidupan sehari-hari. Dalam pengembangan otomatisasi AC dan lampu perlu menerapkan sebuah perangkat yang memiliki fungsi maksimal dengan harga yang minimal. Raspberry Pi merupakan perangkat atau modul dengan harga rendah yang mampu melakukan komunikasi wireless tanpa bantuan modul lain. Dalam pengembangan otomatisasi AC dan lampu juga diperlukan sebuah metode yang mampu melakukan kontrol terhadap nyala AC dan lampu. Penerapan metode fuzzy dapat dilakukan untuk menghimpun informasi keadaan ruang yang didapat dari sensor untuk menentukan nyala AC dan lampu secara otomatis. Oleh sebab itu pada penelitian ini mengusulkan pengembangan otomatisasi AC dan lampu menggunakan Raspberry Pi dan Fuzzy. Otomatisasi AC dan lampu menggunakan Raspberry Pi yang menerapkan metode Fuzzy dapat menghemat energi hingga 59,87% dalam hal lama waktu nyala AC dan 57,47% untuk lumenasi lampu

  13. Sistem Informasi Penjualan dan Pemesanan Layanan Berbasis Web dan SMS Gateway di Petshop "PetZone"

    Directory of Open Access Journals (Sweden)

    Siska Fadhilah Wati

    2013-09-01

    Full Text Available Dewasa ini teknologi informasi sangat membantu dalam dunia bisnis. Kemudahan yang ditawarkan akan menjaring lebih banyak konsumen. Namun, perusahan tingkat menengah seperti PetZone saat ini masih jarang yang menawarkan kemudahan berbelanja atau pemesanan layanan secara online. Oleh karena itu diperlukan sebuah sistem berbasis web di perusahaan PetZone yang dapat memudahkan pemilik dan karyawan dalam apenjualan, pelayanan, dan pemasaran, serta memudahkan pelanggan dalam jual-beli barang dan jasa. Atas dasar masalah tersebut dibangun Sistem Informasi Penjualan dan Pemesanan Layanan Berbasis Web dan SMS Gateway untuk menunjang proses bisnis yang ada. Sistem informasi dibangun menggunakan bahasa pemrograman PHP framework Codeigniter, javascript untuk tampilan yang dinamis, dan database MySQL. Proses pembuatan dan pengembangan Sistem Informasi Penjualan ini menggunakan metode air terjun. Metode air terjun meliputi kebutuhan pengguna, analisis, rancangan, implementasi dan pengujian. Pemodelan Sistem Informasi yang dibangun menggunakan metode berorientasi objek UML (Unified Modeling Language yang terdiri dari Use case  diagram, Class diagram dan Sequence diagram. Hasil pengujian Sistem Informasi Penjualan dan Pemesanan Layanan Berbasis Web dan SMS Gateway menunjukkan bahwa semua fitur yang terdapat baik dalam sistem informasi maupun SMS gateway dapat bekerja dengan baikdengan ratusan sample data, dan server SMS gateway dapat memproses lebih dari satu SMS secara bersamaan. Dalam perkembangan ke depannya nanti, Sistem Informasi Penjualan dan Pemesanan Layanan Berbasis Web dan SMS Gateway masih dapat dikembangkan lagi dengan menambah fitur-fitur pada SMS gateway sehingga lebih memudahkan konsumen.

  14. Rapid prototyped porous nickel–titanium scaffolds as bone substitutes

    Directory of Open Access Journals (Sweden)

    Waldemar Hoffmann

    2014-06-01

    Full Text Available While calcium phosphate–based ceramics are currently the most widely used materials in bone repair, they generally lack tensile strength for initial load bearing. Bulk titanium is the gold standard of metallic implant materials, but does not match the mechanical properties of the surrounding bone, potentially leading to problems of fixation and bone resorption. As an alternative, nickel–titanium alloys possess a unique combination of mechanical properties including a relatively low elastic modulus, pseudoelasticity, and high damping capacity, matching the properties of bone better than any other metallic material. With the ultimate goal of fabricating porous implants for spinal, orthopedic and dental applications, nickel–titanium substrates were fabricated by means of selective laser melting. The response of human mesenchymal stromal cells to the nickel–titanium substrates was compared to mesenchymal stromal cells cultured on clinically used titanium. Selective laser melted titanium as well as surface-treated nickel–titanium and titanium served as controls. Mesenchymal stromal cells had similar proliferation rates when cultured on selective laser melted nickel–titanium, clinically used titanium, or controls. Osteogenic differentiation was similar for mesenchymal stromal cells cultured on the selected materials, as indicated by similar gene expression levels of bone sialoprotein and osteocalcin. Mesenchymal stromal cells seeded and cultured on porous three-dimensional selective laser melted nickel–titanium scaffolds homogeneously colonized the scaffold, and following osteogenic induction, filled the scaffold’s pore volume with extracellular matrix. The combination of bone-related mechanical properties of selective laser melted nickel–titanium with its cytocompatibility and support of osteogenic differentiation of mesenchymal stromal cells highlights its potential as a superior bone substitute as compared to clinically used

  15. Efikasi Kendiri: Perbandingan Antara Islam dan Barat

    Directory of Open Access Journals (Sweden)

    Noornajihan, J.

    2014-12-01

    Full Text Available Terminologi efikasi kendiri (EK merupakan terminologi yang diperkenalkan dalam ilmu psikologi sekitar tahun 70-an. Namun, istilah ini masih kurang difahami oleh kebanyakan individu terutama mereka yang bukan berlatar belakangkan bidang psikologi. Oleh itu, satu keperluan hasil penulisan ini diketengahkan, memandangkan konsep ini penting dalam diri setiap individu bagi memacu kecemerlangan diri. Justeru, kertas kerja ini akan mengupas serba ringkas mengenai konsep EK dari perspektif Islam dan Barat, dengan melihat kepada beberapa titik persamaan dan perbezaan antara kedua-dua pandangan. Islam dan Barat bersetuju bahawa individu yang memiliki EK yang tinggi merupakan individu yang berfikiran positif, berani mengambil risiko dan tidak mudah berputus. Namun pandangan Islam terhadap konsep ini lebih luas, kerana Islam mengaitkan konsep ini dengan konsep tauhid uluhiyyah dan konsep manusia sebagai ahsan al-taqwim. Oleh demikian, EK dari perspektif Islam lebih bersifat kekal dan umum, di samping individu yang berefikasi tinggi menurut Islam ialah individu yang memiliki sifat sabar, syukur, redha dan redha.

  16. PERANCANGAN DAN PENGEMBANGAN PROTOTYPE SISTEM PARKIR

    Directory of Open Access Journals (Sweden)

    Indah Ayu Septriyaningrum

    2016-10-01

    Abstrak  Sistem parkir manual pada pelayanan parkir mall memerlukan pengelolaan dan pengembangan sistem yang lebih rumit dan jauh dari kata efisien. Informasi yang didapatkan pengelola parkir terkait kondisi parkir di lapangan setiap harinya masih kurang. Tujuan dari penelitian ini adalah merancang dan mengembangkan prototype sistem parkir. Metode pengembangan dan perancangan sistem pada penelitian ini adalah metode Waterfall. Hasil yang didapatkan adalah sistem ini dapat mendeteksi keberadaan mobil pada slot parkir yang tersedia dengan bantuan Intel Galileo Board Gen 2 sebagai kontroler, sensor LDR (Light Dependent Resistor dan sensor ultrasonik (PING sebagai alat bantu pendeteksi keberadaan mobil. Sistem dapat menampilkan aktifitas parkir pada aplikasi web seperti kondisi lahan parkir kosong, lahan terisi, waktu masuk, waktu keluar, lama parkir dan kapasitas parkir yang tersedia serta grafik pemakaian lahan parkir. Dapat disimpulkan bahwa perancangan dan pengembangan sistem berhasil diimplementasikan. Kata Kunci : Sistem parkir, waterfall, Intel Galileo Board Gen 2,sensor LDR (Light Dependent Resistor, sensor ultrasonik

  17. Efektivitas Weblog dan Facebook Terintegrasi untuk Pembelajaran Virtual

    OpenAIRE

    Hartono

    2014-01-01

    Abstrak: Saat ini, banyak mahasiswa menghabiskan waktu mereka di internet. Mereka melakukan kegiatan seperti membuat blog, mengunduh, mengunggah, chatting, dan berinteraksi melalui facebook. Mahasiswa sekarang ini hidup dengan teknologi. Penelitian menunjukkan bahwa weblog dan facebook berpotensi mendukung belajar dan mengajar. Guru dan pendidik menggunakan kegiatan tersebut untuk meningkatkan kualitas belajar. Penelitian ini bertujuan untuk mengetahui efektivitas weblog dan facebook ketika d...

  18. Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition

    Science.gov (United States)

    Holcombe, C.E.; Dykes, N.L.

    1992-04-28

    A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness. No Drawings

  19. Relationship between surface properties (roughness, wettability) of titanium and titanium alloys and cell behaviour

    International Nuclear Information System (INIS)

    Ponsonnet, L.; Reybier, K.; Jaffrezic, N.; Comte, V.; Lagneau, C.; Lissac, M.; Martelet, C.

    2003-01-01

    Cell attachment and spreading to titanium-based alloy surfaces is a major parameter in implant technology. In this paper, substratum surface hydrophobicity, surface free energy, interfacial free energy and surface roughness were investigated to ascertain which of these parameters is predominant in human fibroblast spreading. Two methods for contact angle measurement were compared: the sessile drop method and the captive bubble two-probe method. The relationship between surface roughness and the sessile drop contact angles of various engineered titanium surfaces such as commercial pure titanium (cp-Ti), titanium-aluminium-vanadium alloy (Ti-6Al-4V), and titanium-nickel (NiTi), was shown. Surface free energy (SFE) calculations were performed from contact angles obtained on smooth samples based on the same alloys in order to eliminate the roughness effect. SFE of the surfaces have been calculated using the Owens-Wendt (OW) and Van Oss (VO) approaches with the sessile drop method. The OW calculations are used to obtain the dispersive (γ d ) and polar (γ p ) component of SFE, and the VO approach allows to reach the apolar (γ LW ) and the polar acid-base component (γ ab ) of the surface. From captive bubble contact angle experiments (air or octane bubble under water), the interfacial free energy of the different surfaces in water was obtained. A relationship between cell spreading and the polar component of SFE was found. Interfacial free energy values were low for all the investigated surfaces indicating good biocompatibility for such alloys

  20. Titanium oxide nanocoating on a titanium thin film deposited on a glass substrate

    Energy Technology Data Exchange (ETDEWEB)

    Kotsedi, L., E-mail: kotsedi@tlabs.ac.za [UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria (South Africa); Nanosciences African Network (NANOAFNET), iThemba LABS, National Research Foundation, 1 Old Faure Road, Somerset West 7129, PO Box 722, Somerset West, Western Cape (South Africa); Nuru, Z.Y. [UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria (South Africa); Nanosciences African Network (NANOAFNET), iThemba LABS, National Research Foundation, 1 Old Faure Road, Somerset West 7129, PO Box 722, Somerset West, Western Cape (South Africa); Eaton, S.M. [Physics Department, Politecnico di Milano, Piazza Leonardo Da Vinci, 32, 20133 Milano (Italy); Cummings, F.R. [University of the Western Cape, Electron Microscopy Unit, Physics Department, Bellville 7535, Cape Town (South Africa); Turco, S. Lo; Ntwaeaborwa, O.M. [Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Milano, Italy Via Giovanni Pascoli, 70/3, 20133 Milano (Italy); Ramponi, R. [Institute for Photonics and Nanotechnologies (IFN)-CNR, Piazza Leonardo Da Vinci, 32, 20133 Milano (Italy); Maaza, M. [UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria (South Africa); Nanosciences African Network (NANOAFNET), iThemba LABS, National Research Foundation, 1 Old Faure Road, Somerset West 7129, PO Box 722, Somerset West, Western Cape (South Africa)

    2016-03-31

    Thin films of titanium were deposited on a glass substrate using electron beam evaporator. Femtosecond laser pulses were focused on the surface of the films, and the samples were scanned while mounted on the motorized computer-controlled motion stage to produce an areal modification of the films. X-ray diffraction of the laser-patterned samples showed evidence of the formation of a γ-Ti{sub 3}O{sub 5} with a monoclinic phase. Rutherford backscattering spectrometry simulation showed that there is an increase in the oxygen concentration as the average laser fluence is increased. Time of flight secondary ions mass spectrometry analysis showed an even distribution of the titanium and oxygen ions on the sample and also ionized molecules of the oxides of titanium were observed. The formation of the oxide of titanium was further supported using the UV–Vis-NIR spectroscopy, which showed that for 0.1 J/cm{sup 2} fluence, the laser-exposed film showed the electron transfer band and the d–d transition peak of titanium was observed at lower wavelengths. - Highlights: • γ-Ti{sub 3}O{sub 5} formed using femtosecond laser. • Fluence and oxygen relation were studied. • Nanoflakes of γ-Ti{sub 3}O{sub 5} were observed under HRSEM.

  1. A new method for production of titanium vapor and synthesis of titanium nitride coatings

    Science.gov (United States)

    Grigoriev, Sergey N.; Melnik, Yury A.; Metel, Alexander S.; Volosova, Marina A.

    2018-03-01

    It is proposed to synthesize on machine parts and cutting tools wear-resistant titanium nitride coatings with the help of the hollow-cathode glow discharge, a molybdenum crucible for titanium evaporation being used as the anode of the discharge and a process vacuum chamber being used as the hollow cathode. The research revealed that at the anode surface area less than a critical value S* = (2m/M)1/2S, where S is the area of the chamber walls, m is the mass of electrons and M is the mass of ions, the anode fall of potential is positive and grows from ˜50 V at argon pressure p = 0.2 Pa to ˜2 kV at p = 0.02 Pa. At the discharge current I = 0.6 A electrons accelerated by the anode fall of 0.9 kV transport into the crucible with the inner diameter of 12 mm the power of ˜0.54 kW, which allows the titanium evaporation and the coating deposition rate of 5 µm·h-1 on a substrate distanced from the crucible at 100 mm. After the argon is replaced with the nitrogen, titanium nitride coating without titanium droplets is synthesized the deposition rate amounting to about the same value.

  2. Lõuka tuuliku restaureerimine / Dan Lukas

    Index Scriptorium Estoniae

    Lukas, Dan

    2005-01-01

    Hiiumaal Pühalepa vallas Vahtrepa külas Lõuka talu maadel asuva pukktuuliku ajaloost, restaureerimise käigust. Teostus: Dan Lukas. Muinsuskaitseline järelevalve: Tõnu Sepp, tema kommentaar. Ill.:pukktuuliku lõiked ja korruste plaanid, 7 värv. fotot

  3. Internal Control: Peran Dan Perkembangannya

    OpenAIRE

    Murtin, Alek

    2000-01-01

    Perhatian terhadap pentingnya internal control dalam organisasi berjalan dari waktu ke waktu untuk meningkatkan fungsi internal control yang disesuaikan dengan perkembangan lingkungan organisasi, dimulai dengan adanya internal check, kemudian internal control system, internal control structure dan terakhir adalah internal control-integrated framework. Internal control system sempat berkembang beberapa tahun di Indonesia yang selanjutnya digantikan oleh internal control structure yang digunaka...

  4. Asuransi Takaful: Prospek Dan Tantangannya

    OpenAIRE

    Sobirin, Achmad; Muhtar, Muchsin

    1994-01-01

    Dewasa ini perhatian terhadap nilai-nilai syariah Islam terhadap muamalah khususnya di bidang ekonomi menjadi besar. Lembaga perekonomian yang terjalin dengan pranata keagamaan makin menggejala dimana-mana dan kini sedang tumbuh mencari bentuk untuk dapat diterima di tengah-tengah masyarakat.

  5. Microstructure evolution of titanium after tensile test

    International Nuclear Information System (INIS)

    Wronski, S.; Wierzbanowski, K.; Jędrychowski, M.; Tarasiuk, J; Wronski, M.; Baczmanski, A.; Bacroix, B.

    2016-01-01

    The qualitative and quantitative behavior of titanium T40 during tensile loading with a special emphasis on the presence of deformation twins in the observed microstructures is described. The samples for tensile tests were cut out from the rolled titanium sheet along the rolling and transverse directions. Several microstructure maps were determined using Electron Backscatter Diffraction technique (EBSD). These data were used to obtain crystallographic textures, misorientation distributions, grain size, twin boundary length, grain orientation spread, low and high angle boundary fractions and Schmid and Taylor factors. The deformation mechanisms and microstructure characteristics are different in the samples stretched along rolling and transverse directions. A strong appearance of tensile twins was observed in the samples deformed along transverse direction. On the other hand, more frequent subgrain formation and higher orientation spread was observed in the sample deformed along rolling direction, which caused’‘orientation blurring’ leading to an increase of grain size with deformation, as determined from OIM analysis.

  6. Requirements of titanium alloys for aeronautical industry

    Science.gov (United States)

    Ghiban, Brânduşa; Bran, Dragoş-Teodor; Elefterie, Cornelia Florina

    2018-02-01

    The project presents the requirements imposed for aeronatical components made from Titanium based alloys. Asignificant portion of the aircraft pylons are manufactured from Titanium alloys. Strength, weight, and reliability are the primary factors to consider in aircraft structures. These factors determine the requirements to be met by any material used to construct or repair the aircraft. Many forces and structural stresses act on an aircraft when it is flying and when it is static and this thesis describes environmental factors, conditions of external aggression, mechanical characteristics and loadings that must be satisfied simultaneously by a Ti-based alloy, compared to other classes of aviation alloys (as egg. Inconel super alloys, Aluminum alloys). For this alloy class, the requirements are regarding strength to weight ratio, reliability, corrosion resistance, thermal expansion and so on. These characteristics additionally continue to provide new opportunities for advanced manufacturing methods.

  7. Aeronautical Industry Requirements for Titanium Alloys

    Science.gov (United States)

    Bran, D. T.; Elefterie, C. F.; Ghiban, B.

    2017-06-01

    The project presents the requirements imposed for aviation components made from Titanium based alloys. A significant portion of the aircraft pylons are manufactured from Titanium alloys. Strength, weight, and reliability are the primary factors to consider in aircraft structures. These factors determine the requirements to be met by any material used to construct or repair the aircraft. Many forces and structural stresses act on an aircraft when it is flying and when it is static and this thesis describes environmental factors, conditions of external aggression, mechanical characteristics and loadings that must be satisfied simultaneously by a Ti-based alloy, compared to other classes of aviation alloys (as egg. Inconel super alloys, Aluminum alloys).For this alloy class, the requirements are regarding strength to weight ratio, reliability, corrosion resistance, thermal expansion and so on. These characteristics additionally continue to provide new opportunities for advanced manufacturing methods.

  8. Titanium implants in irradiated dog mandibles

    International Nuclear Information System (INIS)

    Schweiger, J.W.

    1989-01-01

    The use of osseointegrated titanium implants has been a great benefit to selected cancer patients who otherwise would not be able to wear conventional and/or maxillofacial prostheses. Cognizant of the risk of osteoradionecrosis, we used an animal model to seek experimental evidence for successful osseointegration in bone irradiated to tumoricidal levels. Five healthy male beagle dogs received 60 gray to a previously edentulated and healed area of the right hemimandible. The left hemimandible was kept as a nonirradiated control. After 9 months, titanium implants were placed and allowed an additional 5 1/2 months to osseointegrate. At that time, block specimens were obtained, radiographed, photographed, and analyzed histologically. Although statistical significance cannot be attached to the results, osseointegration was achieved in half of the irradiated specimens

  9. Characterization of titanium alloys for cryogenic applications

    International Nuclear Information System (INIS)

    Reytier, M.; Kircher, F.; Levesy, B.

    2002-01-01

    Titanium alloys are employed in the design of superconducting magnet support systems for their high mechanical strength associated with their low thermal conductivity. But their use requires a careful attention to their crack tolerance at cryogenic temperature. Measurements have been performed on two extra low interstitial materials (Ti-5Al-2.5Sn ELI and Ti-6Al-4V ELI) with different thickness and manufacturing process. The investigation includes the tensile properties at room and liquid helium temperatures using smooth and notched samples. Moreover, the fracture toughness has been determined at 4.2 K using Compact Tension specimens. The microstructure of the different alloys and the various fracture surfaces have also been studied. After a detailed description of the experimental procedures, practical engineering characteristics are given and a comparison of the different titanium alloys is proposed for cryogenic applications

  10. Titanium(IV), zirconium, hafnium and thorium

    International Nuclear Information System (INIS)

    Brown, Paul L.; Ekberg, Christian

    2016-01-01

    Titanium can exist in solution in a number of oxidation states. The titanium(IV) exists in acidic solutions as the oxo-cation, TiO 2+ , rather than Ti 4+ . Zirconium is used in the ceramics industry and in nuclear industry as a cladding material in reactors where its reactivity towards hydrolysis reactions and precipitation of oxides may result in degradation of the cladding. In nature, hafnium is found together with zirconium and as a consequence of the contraction in ionic radii that occurs due to the 4f -electron shell, the ionic radius of hafnium is almost identical to that of zirconium. All isotopes of thorium are radioactive and, as a consequence of it being fertile, thorium is important in the nuclear fuel cycle. The polymeric hydrolysis species that have been reported for thorium are somewhat different to those identified for zirconium and hafnium, although thorium does form the Th 4 (OH) 8 8+ species.

  11. Biofunctionalization of titanium for dental implant

    Directory of Open Access Journals (Sweden)

    Takao Hanawa

    2010-08-01

    Full Text Available Surface modification is an important and predominant technique for obtaining biofunction in metals for biomedical use including dentistry. One surface modification technique is a process that changes the surface composition, structure, and morphology of a material, leaving the bulk mechanical properties intact. A tremendous number of surface modification techniques to improve the hard tissue compatibility of titanium have been developed. Hydroxyapatite layer, titanium oxide layer, and calcium titanate layer with various morphologies are deposited using electrochemical treatment including micro-arc oxidation. Also, surface modification layers without hydroxyapatite and calcium phosphate are chemically formed that accelerate bone formation. Other approach is the immobilization of biofunctional molecules such as poly(ethylene glycol to the metal surface to control the adsorption of proteins and adhesion of cells, platelets, and bacteria. In the case of immobilization of biomolecules such as collagen and peptide, bone formation and soft tissue adhesion are improved.

  12. Characterization of the titanium Kβ spectral profile

    International Nuclear Information System (INIS)

    Chantler, C T; Smale, L F; Kinnane, M N; Illig, A J; Kimpton, J A; Crosby, D N

    2013-01-01

    Transition metals have Kα and Kβ characteristic radiation possessing complex asymmetric spectral profiles. Instrumental broadening normally encountered in x-ray experiments shifts features of profiles used for calibration, such as peak energy, by many times the quoted accuracies. We measure and characterize the titanium Kβ spectral profile. The peak energy of the titanium Kβ spectral profile is found to be 4931.966 ± 0.022 eV prior to instrumental broadening. This 4.5 ppm result decreases the uncertainty over the past literature by a factor of 2.6 and is 2.4 standard deviations from the previous standard. The spectrum is analysed and the resolution-free lineshape is extracted and listed for use in other experiments. We also incorporate improvement in analysis applied to earlier results for V Kβ. (paper)

  13. Antibacterial Titanium Produced Using Selective Laser Melting

    Science.gov (United States)

    Macpherson, Andrew; Li, Xiaopeng; McCormick, Paul; Ren, Ling; Yang, Ke; Sercombe, Timothy B.

    2017-12-01

    Titanium and titanium alloys used in current medical and dental applications do not possess antibacterial properties, and therefore, postoperative infection remains a significant risk. Recently, the addition of silver and copper to conventional biomaterials has been shown to produce a material with good antibacterial properties. In this article, we investigate selective laser melting as a method of producing antibacterial Ti-6Al-4V containing elemental additions of Cu or Ag. The addition of Ag had no effect on the microstructure or strength, but it did result in a 300% increase in the ductility of the alloy. In contrast, the addition of Cu resulted in an increase in strength but in a decrease in ductility, along with a change in the structure of the material. The Cu-containing alloy also showed moderate antibacterial properties and was superior to the Ag-containing alloy.

  14. Standard digital reference images for titanium castings

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    2010-01-01

    1.1 The digital reference images provided in the adjunct to this standard illustrate various types and degrees of discontinuities occurring in titanium castings. Use of this standard for the specification or grading of castings requires procurement of the adjunct digital reference images, which illustrate the discontinuity types and severity levels. They are intended to provide the following: 1.1.1 A guide enabling recognition of titanium casting discontinuities and their differentiation both as to type and degree through digital radiographic examination. 1.1.2 Example digital radiographic illustrations of discontinuities and a nomenclature for reference in acceptance standards, specifications and drawings. 1.2 The digital reference images consist of seventeen digital files each illustrating eight grades of increasing severity. The files illustrate seven common discontinuity types representing casting sections up to 1-in. (25.4-mm). 1.3 The reference radiographs were developed for casting sections up to 1...

  15. Precipitated nanosized titanium dioxide for electrochemical applications

    Energy Technology Data Exchange (ETDEWEB)

    Kirillov, S.A. [Joint Department of Electrochemical Energy Systems, 38A Vernadsky Ave., 03142 Kyiv (Ukraine); Institute for Sorption and Problems of Endoecology, 13 Gen. Naumov St., 03164 Kyiv (Ukraine); Lisnycha, T.V. [Institute for Sorption and Problems of Endoecology, 13 Gen. Naumov St., 03164 Kyiv (Ukraine); Chernukhin, S.I. [Joint Department of Electrochemical Energy Systems, 38A Vernadsky Ave., 03142 Kyiv (Ukraine)

    2011-02-15

    Two types of titanium dioxide samples precipitated from aqueous solutions of titanium tetrachloride are investigated. Crystalline materials are obtained by means of neutralization of TiCl{sub 4} with the solution of an alkali metal hydroxide. The change of the order of mixing leads to amorphous materials. The evolution of the samples upon the thermal treatment is characterized using XRD, SEM, TEM and porosity studies. The application of crystalline TiO{sub 2} as an electrode material in lithium-ion 2016 sample cells enable one to yield specific currents up to 3350 mA g{sup -1}. On the other hand, the thermal treatment of initially amorphous materials does not lead to complete crystallization, and the presence of amorphous TiO{sub 2} is well seen as the so-called capacity behavior of cyclic voltammetry curves. (author)

  16. Temperature effect on surface oxidation of titanium

    International Nuclear Information System (INIS)

    Vaquilla, I.; Barco, J.L. del; Ferron, J.

    1990-01-01

    The effect of temperature on the first stages of the superficial oxidation of polycrystalline titanium was studied using both Auger electron spectroscopy (AES) and emission shreshold (AEAPS). The number of compounds present on the surface was determined by application of the factor analysis technique. Reaction evolution was followed through the relative variation of Auger LMM and LMV transitions which are characteristic of titanium. Also the evolution of the chemical shift was determined by AEAPS. The amount of oxygen on the surface was quantified using transition KLL of oxygen. It was found that superficial oxidation depends on temperature. As much as three different compounds were determined according to substrate temperature and our exposure ranges. (Author). 7 refs., 5 figs

  17. Preparation procedure for spherical titanium powders by RF induction plasma

    International Nuclear Information System (INIS)

    Gu Zhongtao; Jin Yuping; Ye Gaoying

    2011-01-01

    The paper uses the single-factor method for the study of spherical titanium powder preparation process. Titanium powders with excellent sphericity can be prepared through controlling and regulating the radio frequency plasma anode working current and voltage, central gas flow rate, sheath gas flow rate, powder-carrying gas flow rate, negative ventilation pressure and powder feed rate, etc. Spheroidization of titanium powders with a size of (17.0±2.0) μm is performed by radio frequency plasma technology. With the increase of negative ventilation pressure, the spheroidization rate of titanium powders increases firstly and then decreases rapidly at the turning point around 1800 Pa. With the rate of powder feed increasing, the spheroidization rate of titanium powders increases firstly. When the powder feed rate is greater than 90.0 g/min, the spheroidization rate of titanium powders reduces rapidly as the powder feed rate increases. (authors)

  18. KETENTUAN TENTANG STANDAR PELAYANAN MINIMAL BIDANG KELUARGA BERENCANA DAN KELUARGA SEJAHTERA BERDASARKAN ASAS PERIKEMANUSIAAN DAN HAK ASASI MANUSIA

    Directory of Open Access Journals (Sweden)

    . Riyanti

    2017-01-01

    Hasil penelitian, ketentuan tentang standar pelayanan minimal bidang keluarga berencana, keluarga sejahtera dan asas perikemanusiaan dengan hak asasi manusia sangat berhubungan keterbatasan lingkup pelayanan dan standar pelaksanaan Komunikasi Informasi dan Edukasi yang tidak jelasberdampak pada tidak dipenuhinya hak asasi manusia untuk mendapatkan kesetaraan dan kebebasan dalam pelayanan keluarga berencana dan keluarga sejahtera.

  19. Fatigue Strength of Titanium Risers - Defect Sensitivity

    Energy Technology Data Exchange (ETDEWEB)

    Babalola, Olusegun Tunde

    2001-07-01

    This study is centred on assessment of the fatigue strength of titanium fusion welds for deep-water riser's applications. Deep-water risers are subjected to significant fatigue loading. Relevant fatigue data for titanium fusion welds are very scarce. Hence there is a need for fatigue data and life prediction models for such weldments. The study has covered three topics: Fatigue testing, Fractography and defect assessment, and Fracture Mechanics modelling of fatigue crack growth. Two series of welded grade of titanium consisting of 14 specimens in each series were fatigue tested under constant amplitude loading. Prior to fatigue testing, strain gauge measurements of some specimens was conducted to enable the definition of stress range in the fatigue assessment procedure. The results were compared with finite solid element analysis and related to fatigue stresses in a riser pipe wall. Distribution and geometry of internal and surface defects both in the as-welded and in the post-weld machined conditions were assessed using fractography. This served as a tool to determine the fatigue initiation point in the welds. Fracture mechanics was applied to model fatigue strength of titanium welds with initiation from weld defects. Two different stress intensity factor formulations for embedded eccentrically placed cracks were used for analysis of elliptical cracks with the major axis parallel and close to one of the free surfaces. The methods were combined to give a satisfactory model for crack growth analysis. The model analyses crack growth of elliptical and semi-elliptical cracks in two directions, with updating of the crack geometry. Fatigue strength assessment was conducted using two crack growth models, the Paris-Erdogan relation with no threshold and the Donahue et al. relation with an implied threshold. The model was validated against experimental data, with a discussion on the choice of crack growth model. (author)

  20. Titanium 󈨠: Science and Technology. Volume 3

    Science.gov (United States)

    1993-01-01

    Impurities in titanium which affect the performance of LSI devices are alkaline metals (Na, K), radioactive metals(U,Th), and heavy metals (Fe, Ni, Cr...protection system just started, can help to solve this problem and water polution . Of course mother kind of paint is now proposed. Ti remains also...treattent was set with 3 or 4 repeats at randoi arrangeient. The results of tests were lade with latheiathlcal signifi- cant evalution.The radioactive

  1. Titanium Brazing for Structures and Survivability

    Science.gov (United States)

    2007-05-01

    first method ( Weld +HIP) was a tungsten inert gas ( TIG ) weld around the exterior of the Ti- 6Al-4V blocks followed by hot isostatic pressing (HIP) at...beam welding plus hot isostatic pressing (E-beam+HIP) process in the encapsulation of a ceramic within a titanium structure. The testing of the...different joining methods highlighted some definite candidates for the replacement of the E-beam+HIP process , such as the Weld +HIP, and demonstrated

  2. Innovations: laser-cutting nickel-titanium

    Energy Technology Data Exchange (ETDEWEB)

    Dickson, T.R.; Moore, B.; Toyama, N. [LPL Systems, Inc., Mountain View, CA (United States)

    2002-07-01

    Laser-cutting is well established as the preferred method for manufacturing many endovascular medical devices. Sometimes laser processing has been poorly understood by nickel-titanium (NiTi) material suppliers, medical device manufacturers, and device designers, but the field has made important strides in the past several years. A variety of sample, nonspecific applications are presented for cutting tubing and sheet stock. Limiting constraints, key considerations, and areas for future development are identified. (orig.)

  3. KINERJA DAN EFISIENSI BANK PEMERINTAH (BUMN DAN BUSN YANG GO PUBLIK DI INDONESIA

    Directory of Open Access Journals (Sweden)

    Sugeng Haryanto

    2012-06-01

    Full Text Available Penelitian ini menganalisis kinerja dan tingkat efisiensi bank-bank BUMN dan BUSN yang go Publik di Bursa Efek Indonesia.  Sample penelitian ini mengambil  tiga bank BUMN Bank BNI 46, Bank Mandiri dan Bank BRI  dan tiga bank BUSN (Bank BCA, Bank Niaga dan Bank Panin dengan periode analisis tahun 2005-2011. Varibael yang digunakan meliputi ROA, ROE, LAR. LDR, NPL dan BOPO. Tujuan dari penelitian ini adalah melihat dan menganalisis perbedaan kinerja antara Bank BUMN dan BUSN yang go public di Bursa Efek Indonesia tahun 2005-2011.  Pendekatan pengukuran kinerja yang digunakan adalah Return on Asset (ROA, Return on Equity (ROE dan Loan to Deposit Ratio (LDR, Loan to Asset Ratio (LAR,  dan efisiensi bank. Hasil dari penelitian menunjukkan bahwa 1 Bank-bank nasional, baik itu bank BUMN maupun BUSN menunjukkan kinerja yang semakin baik, 2 tidak terdapat perbedaan yang signifikan antara kinerja bank BUMN dan BUSN untuk variabel ROA, ROE, LAR, LDR, dan BOPO sedangkan variabel NPL yang merupakan indikator risiko kredit menunjukkan adanya perbedaan yang signifikan antara Bank BUMN dan BUSN

  4. Custom-made laser-welded titanium implant prosthetic abutment.

    Science.gov (United States)

    Iglesia-Puig, Miguel A

    2005-10-01

    A technique to create an individually modified implant prosthetic abutment is described. An overcasting is waxed onto a machined titanium abutment, cast in titanium, and joined to it with laser welding. With the proposed technique, a custom-made titanium implant prosthetic abutment is created with adequate volume and contour of metal to support a screw-retained, metal-ceramic implant-supported crown.

  5. Iron-titanium-mischmetal alloys for hydrogen storage

    Science.gov (United States)

    Sandrock, Gary Dale

    1978-01-01

    A method for the preparation of an iron-titanium-mischmetal alloy which is used for the storage of hydrogen. The alloy is prepared by air-melting an iron charge in a clay-graphite crucible, adding titanium and deoxidizing with mischmetal. The resultant alloy contains less than about 0.1% oxygen and exhibits a capability for hydrogen sorption in less than half the time required by vacuum-melted, iron-titanium alloys.

  6. On reaction of titanium polonides with carbon dioxide

    International Nuclear Information System (INIS)

    Abakumov, A.S.; Malyshev, M.L.; Reznikova, N.F.

    1986-01-01

    The reaction between titanium polonides and carbon dioxide has been studied by comparing titanium polonide thermal resistance in vacuum and in carbon dioxide. The investigation has shown that titanium mono- and semipolonides fail at temperatures below 350 deg C. Temperature dependence of polonium vapor pressure prepared at failure of the given polonides is determined by the radiotensiometry in carbon dioxide. Enthalpy calculated for this dependence is close to the enthalpy of elementary polonium evaporation in vacuum

  7. Electrochemical Characterization of Surface Reactions on Biomedical Titanium alloys

    OpenAIRE

    Alkhateeb, Emad Hashim

    2008-01-01

    Titanium and its alloys are successfully used as implant materials for dental, orthopedic and osteosynthesis applications. The processes that take place at the implant tissue interface are important for the acceptance and integration of the implant. This thesis is divided into two parts: the first part deals with surface modification of titanium to improve the osseointegration, and the second part studies metastable pitting of titanium and its alloys. The weakly attached layer of a bone-like ...

  8. Sorption of cesium on titanium and zirconium phosphates

    International Nuclear Information System (INIS)

    Lebedev, V.N.; Mel'nik, N.A.; Rudenko, A.V.

    2003-01-01

    Titanium and zirconium phosphates were prepared from mineral raw materials of the Kola Peninsula. Their capability to recover cesium cations from the model solutions and liquid radioactive waste (LRW) was studied. Titanium phosphate prepared from solutions formed by titanite breakdown demonstrates greater distribution coefficients of cesium as compared to zirconium phosphate. Titanium phosphate as a cheaper agent featuring greater sorption capacity was recommended for treatment of LRW to remove cesium [ru

  9. PEMBINAAN DAN PENGEMBANGAN USAHA KECIL

    Directory of Open Access Journals (Sweden)

    Sentot Harman Glendoh

    2001-01-01

    Full Text Available Small business as an economic activity of society on a small scale, has a central role in the economy of Indonesia. Although the economic crisis has created a great disturbance in the live of large and middle-size business, apparently small business continues to function well in the lower levels of the economy. The main role of small business is: 1 use excess labor; 2 as a producer of goods and services at reachable prices for the lower economic levels of society; 3 as a potential producer of foreign exchange because of the success of this type of industry in producing non-oil commodities for export. Remembering that the role of small business is large and has great influence on the lower economic levels of society, it is quite necessary to pay attention to the development of this sector. Abstract in Bahasa Indonesia : Usaha kecil sebagai kegiatan ekonomi rakyat berskala kecil memiliki peran sentral dalam perekonomian Indonesia. Walaupun krisis ekonomi telah memporakporandakan kehidupan bidang usaha besar dan menengah, ternyata usaha kecil tetap tegar dan berjalan marak dikawasan kehidupan ekonomi tingkat bawah. Peran pokok usaha kecil ini adalah: (1 sebagai penyerap tenaga kerja, (2 sebagai penghasil barang dan jasa pada tingkat harga yang terjangkau bagi kebutuhan rakyat banyak yang berpenghasilan rendah, (3 sebagai penghasil devisa negara yang potensial kerena keberhasilannya dalam meproduksi komoditi ekspor non migas. Mengingat peran usaha kecil tersebut sangat besar andilnya bagi negara dan masyarakat kecil dilapisan bawah, maka pembinaan dan pengembangannya sangat perlu diperhatikan. Kata kunci: pembinaan, pengembangan, usaha kecil.

  10. Niobium Titanium and Copper wire samples

    CERN Multimedia

    2009-01-01

    Two wire samples, both for carrying 13'000Amperes. I sample is copper. The other is the Niobium Titanium wiring used in the LHC magnets. The high magnetic fields needed for guiding particles around the Large Hadron Collider (LHC) ring are created by passing 12’500 amps of current through coils of superconducting wiring. At very low temperatures, superconductors have no electrical resistance and therefore no power loss. The LHC is the largest superconducting installation ever built. The magnetic field must also be extremely uniform. This means the current flowing in the coils has to be very precisely controlled. Indeed, nowhere before has such precision been achieved at such high currents. Magnet coils are made of copper-clad niobium–titanium cables — each wire in the cable consists of 9’000 niobium–titanium filaments ten times finer than a hair. The cables carry up to 12’500 amps and must withstand enormous electromagnetic forces. At full field, the force on one metre of magnet is comparable ...

  11. A sourcebook of titanium alloy superconductivity

    CERN Document Server

    Collings, E W

    1983-01-01

    In less than two decades the concept of supercon­ In every field of science there are one or two ductivity has been transformed from a laboratory individuals whose dedication, combined with an innate curiosity to usable large-scale applications. In the understanding, permits them to be able to grasp, late 1960's the concept of filamentary stabilization condense, and explain to the rest of us what that released the usefulness of zero resistance into the field is all about. For the field of titanium alloy marketplace, and the economic forces that drive tech­ superconductivity, such an individual is Ted Collings. nology soon focused on niobium-titanium alloys. They His background as a metallurgist has perhaps given him are ductile and thus fabricable into practical super­ a distinct advantage in understanding superconduc­ conducting wires that have the critical currents and tivity in titanium alloys because the optimization of fields necessary for large-scale devices. More than superconducting parameters in ...

  12. Progress in Titanium Metal Powder Injection Molding

    Directory of Open Access Journals (Sweden)

    Randall M. German

    2013-08-01

    Full Text Available Metal powder injection molding is a shaping technology that has achieved solid scientific underpinnings. It is from this science base that recent progress has occurred in titanium powder injection molding. Much of the progress awaited development of the required particles with specific characteristics of particle size, particle shape, and purity. The production of titanium components by injection molding is stabilized by a good understanding of how each process variable impacts density and impurity level. As summarized here, recent research has isolated the four critical success factors in titanium metal powder injection molding (Ti-MIM that must be simultaneously satisfied—density, purity, alloying, and microstructure. The critical role of density and impurities, and the inability to remove impurities with sintering, compels attention to starting Ti-MIM with high quality alloy powders. This article addresses the four critical success factors to rationalize Ti-MIM processing conditions to the requirements for demanding applications in aerospace and medical fields. Based on extensive research, a baseline process is identified and reported here with attention to linking mechanical properties to the four critical success factors.

  13. Shock response of a gamma titanium aluminide

    International Nuclear Information System (INIS)

    Shazly, Mostafa; Prakash, Vikas

    2008-01-01

    Potential use of γ-TiAl alloys in aerospace and other structural applications require knowledge of their impact behavior for better evaluation and modeling. In the present study plate impact experiments are conducted using a single-stage gas gun to better understand the shock behavior of the recently developed class of gamma titanium aluminide alloys--the Gamma-Met PX. The Gamma-Met PX showed superior shock properties when compared to the conventional titanium aluminide alloys. The spall strength of Gamma-Met PX is 1.8±0.09 GPa, which is four to six times higher than those reported for other gamma titanium aluminide alloys. Moreover, it has a Hugoniot elastic limit of 1.88 GPa at a target thickness of 3.86 mm, which drops to 1.15 GPa at target thickness of 15.8 mm. The decay in the elastic precursor is continuous without showing an asymptote to a constant level within the range of target thicknesses studied

  14. Titanium oxidation by rf inductively coupled plasma

    International Nuclear Information System (INIS)

    Valencia-Alvarado, R; López-Callejas, R; Barocio, S R; Mercado-Cabrera, A; Peña-Eguiluz, R; Muñoz-Castro, A E; Rodríguez-Méndez, B G; De la Piedad-Beneitez, A; De la Rosa-Vázquez, J M

    2014-01-01

    The development of titanium dioxide (TiO 2 ) films in the rutile and anatase phases is reported. The films have been obtained from an implantation/diffusion and sputtering process of commercially pure titanium targets, carried out in up to 500 W plasmas. The experimental outcome is of particular interest, in the case of anatase, for atmospheric pollution degradation by photocatalysis and, as to the rutile phase, for the production of biomaterials required by prosthesis and implants. The reactor employed consists in a cylindrical pyrex-like glass vessel inductively coupled to a 13.56 MHz RF source. The process takes place at a 5×10 −2 mbar pressure with the target samples being biased from 0 to -3000 V DC. The anatase phase films were obtained from sputtering the titanium targets over glass and silicon electrically floated substrates placed 2 cm away from the target. The rutile phase was obtained by implantation/diffusion on targets at about 700 °C. The plasma was developed from a 4:1 argon/oxygen mixture for ∼5 hour processing periods. The target temperature was controlled by means of the bias voltage and the plasma source power. The obtained anatase phases did not require annealing after the plasma oxidation process. The characterization of the film samples was conducted by means of x-ray diffraction, scanning electron microscopy, x-ray photoelectron spectroscopy and Raman spectroscopy

  15. AGROFORESTRI UNTUK ADAPTASI DAN MITIGASI PERUBAHAN IKLIM

    Directory of Open Access Journals (Sweden)

    Tigor Butarbutar

    2017-01-01

    Full Text Available Hilangnya tutupan lahan hutan karena konversi hutan untuk pemukiman, perkebunan, pertanian dan kebutuhan untuk pembangunan di sektor lain, telah menyebabkan perubahan pola cuaca/iklim di berbagai tempat. Perubahan iklim dapat diantisipasi dengan mitigasi dan adaptasi. Mitigasi berarti usahausaha pencegahan yang perlu dilakukan, sedangkan adaptasi merupakan kegiatan-kegiatan penyesuaian yang perlu dilakukan untuk dapat hidup dan bertahan dan meningkatkan ketahanan, kelenturan dan mengarahkemigrasikarenakondisiiklimyangberbeda.Agroforestridapatmemitigasidanmengadaptasi perubahaniklim dengan alasan-alasansebagaiberikut: aPencampuranjenis pohonpenghasilkayu,buah dan lain-lain, karena campuran jenis lebih baik dari tanaman murni; b Pencampuran jenis yang didasarkan pada sifat toleransi ( dan , sehingga akan memanfaatkan seluruh cahaya untuk fotosintesis; c Pencampuran perbedaan umur; d Pencampuran berdasarkan perbedaan waktu pemanenan; e Penggabungan nilai ekonomi, sosial dan budaya sehingga perubahan vegetasi dapat berjalan seiring dengan perubahan sosial dan budaya secara berangsur yang dapat disesuaikan dengan perubahan iklim; dan f Dapat digunakan sebagai model untuk memfasilitasi perubahan kelompok vegetasi menjadi kelompok yang baru (adaptasi, seperti teori perubahan vegetasi melalui perladangan berpindah-pindahyangteratur.

  16. INDUSTRIALISASI DAN TANTANGANNYA PADA SEKTOR PENDIDIKAN

    Directory of Open Access Journals (Sweden)

    Arif Unwanullah

    2015-10-01

    Full Text Available Abstrak: Industrialisasi dan Tantangannya pada Sektor Pendidikan. Sumbangan pendidikan dalam perubahan dan pembangunan masa lalu telah bergeser dengan kemajuan teknoekonomi dan komunikasi. Perubahan yang terjadi telah menggeser tatanan kehidupan dan pandangan masyarakat. Materialisme, kapitalisme, efisiensi, dan efektivitas telah menjadi tujuan dan semangat hidup. Pergeseran pandangan masyarakat telah mengubah pula pandangan keberhasilan dan mutu pendidikan, di mana pendidikan diukur dari keberhasilan dalam keterserapan lulusan dalam dunia kerja, oleh karenanya pendidikan dianalisis dari karakteristik sebagai investasi (capital-investment. Pergeseran makna dan tanggung jawab pendidikan mendorong dunia pendidikan melakukan pembaruan dengan alternatif: membangun pembaruan penalaran warganya menuju pemerdekaan dan pendewasaan, pendidikan dilaksanakan secara komprehensif dan bekerjasama dengan semua pihak secara kemitraan, dan membangun visi pendidikan secara komprehensif dan simultan dengan semua pihak. Kata kunci: perubahan sosial, materialistik, modernisasi dan kapitalis Abstract: Industrialization and its education Sector challenges. Contribution of education has shifted with the progress of technology, economy, and communication. The changes have shifted the society's views. Materialism, capitalism, efficiency, and effectiveness have become of interest and enthusiasm for life. The shift has changed society's view, i.e. the view of success and quality of education, in which education is measured from a rate of the absorption of graduates into labor market, therefore education is analyzed from the characteristics of an investment (capital-investment. A shift in meaning and responsibility of education encourages the education sector to create reformation through these following alternatives: creating new thoughts towards liberation and maturation, implementing education comprehensively and cooperating with all parties in partnership, and creating

  17. Desain dan Uji Kinerja Fungsional Sistem Penggerak dan Kendali ROVERGARD

    Directory of Open Access Journals (Sweden)

    Moh Fikri Pomalingo

    2017-04-01

    Full Text Available Abstract The high population rate has an impact on increasing of land function change from agricultural land become housing and commercial building. As a result, it is difficult to get land for planting in the urban area. Therefore, this research is aimed to design equipment that can be used for planting in the narrow land using vertical gardening. This paper will report about design and functional testing of drive and control system on ROVERGARD. Drive system is based on water pump with additional gear train and chainsprocket mechanism. Control system use was on open loop type based on timer. The performance test of drive system was focused on electrical energy consumption and rotational speed of the system that was measured by multifunctional mini ammeter and tachometer. The control system was tested during 4 days, to evaluate their performances between set point and actual timing while filling water tank and rotate the system at maximal load condition. Electrical power consumption was 208 W at average rotational speed 2703 rpm. Increasing load caused an increase of energy consumption but made the drive rotation decline. The position control performance had on position error around 50 cm. Consequently, setting time on timer must be adjusted. Abstrak Laju pertumbuhan penduduk yang tinggi, mengakibatkan tingginya alih fungsi lahan pertanian menjadi bangunan perumahan dan komersial. Masalah ini mengakibatkan sulitnya mencari lahan pertanian di daerah padat penduduk khususnya perkotaan. Oleh karena itu perlu dirancang sebuah alat yang dapat digunakan untuk bercocok tanam di lahan sempit. Tujuan dari penelitian ini adalah mendesain dan menguji sistem penggerak dan kendali pada ROVERGARD. Sistem penggerak berasal dari pompa air yang dimodifikasi. Sedangkan sistem kendali menggunakan tipe open loop berbasis waktu dimana timer sebagai komponen utamanya. Pengujian kinerja penggerak difokuskan pada konsumsi listrik dan rpm yang diukur menggunakan

  18. On the principles of microstructure scale development for titanium alloys

    International Nuclear Information System (INIS)

    Kolachev, B.A.; Mal'kov, A.V.; Gus'kova, L.N.

    1982-01-01

    Analysis of an existing standard scale of microstructures for two-phase (α+#betta#)-titanium alloy semiproducts is given. The basic principles of development of control microstructure scales for titanium alloys are presented on the base of investigations and generalization of literature data on connection of microstructure of titanium intermediate products from (α+#betta#)-alloys with their mechanical properties and service life characteristics. A possibilities of changing mechanical and operating properties at the expense of obtaining qualitatively and quantitatively regulated microstructure in the alloy are disclosed on the example of the (α+#betta#)-titanium alloy

  19. Cold Spraying of Armstrong Process Titanium Powder for Additive Manufacturing

    Science.gov (United States)

    MacDonald, D.; Fernández, R.; Delloro, F.; Jodoin, B.

    2017-04-01

    Titanium parts are ideally suited for aerospace applications due to their unique combination of high specific strength and excellent corrosion resistance. However, titanium as bulk material is expensive and challenging/costly to machine. Production of complex titanium parts through additive manufacturing looks promising, but there are still many barriers to overcome before reaching mainstream commercialization. The cold gas dynamic spraying process offers the potential for additive manufacturing of large titanium parts due to its reduced reactive environment, its simplicity to operate, and the high deposition rates it offers. A few challenges are to be addressed before the additive manufacturing potential of titanium by cold gas dynamic spraying can be reached. In particular, it is known that titanium is easy to deposit by cold gas dynamic spraying, but the deposits produced are usually porous when nitrogen is used as the carrier gas. In this work, a method to manufacture low-porosity titanium components at high deposition efficiencies is revealed. The components are produced by combining low-pressure cold spray using nitrogen as the carrier gas with low-cost titanium powder produced using the Armstrong process. The microstructure and mechanical properties of additive manufactured titanium components are investigated.

  20. High temperature evaporation of titanium, zirconium and hafnium carbides

    International Nuclear Information System (INIS)

    Gusev, A.I.; Rempel', A.A.

    1991-01-01

    Evaporation of cubic nonstoichiometric carbides of titanium, zirconium and hafnium in a comparatively low-temperature interval (1800-2700) with detailed crystallochemical sample certification is studied. Titanium carbide is characterized by the maximum evaporation rate: at T>2300 K it loses 3% of sample mass during an hour and at T>2400 K titanium carbide evaporation becomes extremely rapid. Zirconium and hafnium carbide evaporation rates are several times lower than titanium carbide evaporation rates at similar temperatures. Partial pressures of metals and carbon over the carbides studied are calculated on the base of evaporation rates

  1. In situ hydride formation in titanium during focused ion milling.

    Science.gov (United States)

    Ding, Rengen; Jones, Ian P

    2011-01-01

    It is well known that titanium and its alloys are sensitive to electrolytes and thus hydrides are commonly observed in electropolished foils. In this study, focused ion beam (FIB) milling was used to prepare thin foils of titanium and its alloys for transmission electron microscopy. The results show the following: (i) titanium hydrides were observed in pure titanium, (ii) the preparation of a bulk sample in water or acid solution resulted in the formation of more hydrides and (iii) FIB milling aids the precipitation of hydrides, but there were never any hydrides in Ti64 and Ti5553.

  2. KONTEKS DAN KONSTRUKSI SOSIAL MENGENAI KEMATIAN ELEKTIF ( EUTHANASIA ∗

    Directory of Open Access Journals (Sweden)

    Helly Prajitno Soetjipto

    2015-09-01

    konteks sosial dan konstruksi sosial kematian. Euthanasia didiskusikan di dalam suatu kerangka pikir yang mencoba memberi perhatian kepada hal-hal yang kontekstual dan interpretatif fenomena sosial suatu proses kematian dan kejadian kematian

  3. Phase equilibria and thermodynamic studies in the titanium-nickel and titanium-nickel-oxygen systems

    International Nuclear Information System (INIS)

    Chattopadhyay, G.; Kleykamp, H.; Laumer, W.

    1983-01-01

    The isothermal section of the Ti-Ni-O system was examined at 1200 K in the regions between the Ni(Ti) solid solution and the binary oxides of titanium. The relative partial Gibbs energies of oxygen over the Ti 2 O 3 -Ti 3 O 5 region and of titanium in the Ni(Ti) solid solution as well as the Gibbs energies of formation of NiTiO 3 , Ti 3 O 5 and TiNi 3 were determined between 1100 and 1300 K by use of solid electrolyte galvanic cells. (orig.) [de

  4. DIAGNOSIS DAN PENATALAKSANAAru LIMFOMA ORtsITA

    Directory of Open Access Journals (Sweden)

    Ardizal Rahman

    2014-12-01

    Full Text Available Limfoma orbita merujuk pada limfoma yang terjadi di konjungtiva, kelenjar lakrimal, palpebradan otot-otot ekstraokular. Limfoma primer non-Hodgkin (NHL dari orbita dapat ditemukanpada hanya 1o/o dari semua limforna non-Hodgkin. Anaiisis mutasi somatik pada regiovariabel (V dari immunoglobulin (ig dan segmen gen rantai berat (H telah menunjukkanperan dari stimulasi antigen kronik pada patogenesis limfoma /nucosa-associated lymphoidflssue (MALT. Patogen mikroba seperti Helicobacter pylaridan Chlamydia pneumonia dapaimendasari proses inflamasi dan pada akhirnya memicu akuisisi MALT juga memainkanperan penting dalam tranformasi maligna dan ekspansi klonal lanjutan limfoma. Penentuanstadium kanker sangat penting karena akan menentukan terapi apa yang akan diberikan dankemungkinan remisi dan prognosisnya. Berdasarkan sistem stadium Ann-Arbor, limfoma yangterbatas di orbita disebut sebagai stadium l, keterlibatan struktur sekitar (sinus paranasal,tonsil, dan hidung menjadikannya stadium ll. Stadium lll adalah penyakit nodal abdominaldibawah diafragma dan stadium lV merujuk pada keterlibatan yang tersebar dari satu ataulebih lokasi ekstranodal (hepar, sum-sum tulang atau sistem saraf pusat. Mayoritas pasiendatang dengan keluhan massa konjungtiva berwarna pink (91%, diikuti hiperemis konjungtiva(32%, propiosis (27%, massa palpebra atau orbita (19"fi, penurunan visus dan ptosis (6%,dan diplopia(2%. Bilateralitas terjadi pada 10% hingga 15% kasus dimana 80 % terjadisecarasimultan sedangkan 20% merupakan kondisi yang berurutan. Penilaian lanjut untuk stagingyang akurat dan perencanaan terapitermasuk anamnesis yang lengkap dan pemeriksaan fisik,pemeriksaan laboratorium rutin, elektroforesis protein sei-um, LDH serum, Fr-mikroglobulin,rontgen thoraks, CT scan thoraks, abdornen, dan pelvis, dan biopsisum-sum tulang. Diagnosapositif harus berdasarkan pada perneriksaan histologik dari sampeltumor yang memadai yangdiperoleh dengan biopsiorbita. Beberapa kriteria

  5. TRANSFORMASI ORGANISASIONAL DAN MSDM: HAMBATAN DAN IMPLIKASINYA PADA REKRUTMEN DAN SELEKSI

    Directory of Open Access Journals (Sweden)

    Licen Indahwati Darsono

    2002-01-01

    Full Text Available Rapid change of environment is an external force that causes the organization to transform. Fundamentally, the main purpose of the transformation is to change the organizational structure to be more flexible and competitive with fewer hierarchial levels, managers, and employees. The transformation needs to be radical, causing resistance from the organization's members. Their resistance can cause the transformation to fail, therefore organization must find ways to lessen this resistance. First, organization must learn about the diversity of its members' cultures and values. Second, organization must build its own organizational culture which can support the success of the transformation, by communicating it with the members of the organization. To support organizational culture building efforts, it needs changes in human resources practices, especially recruitment and selection. Abstract in Bahasa Indonesia : Perubahan yang cepat dalam lingkungan merupakan kekuatan eksternal yang mengakibatkan transformasi dalam sebuah organisasi. Pada dasarnya, tujuan utama dari transformasi tersebut adalah merubah struktur organisasi agar menjadi lebih fleksibel dan mampu bersaing, dengan tingkat structural yang sedikit, serta jumlah manajer dan karyawan yang lebih kecil. Transformasi tersebut harus menyeluruh, dan hal ini dapat menyebabkan resistensi dari para anggota organisasi yang memperhambat perubahan tersebut. Resistensi itu bisa menyebabkan perubahan tersebut batal, oleh karena itu organisasi harus mencari jalan untuk mengurangi hambatan-hambatan tersebut. Pertama, organisasi harus belajar keanekaragaman dari budaya dan nilai anggotanya. Kedua, organisasi harus mengembangkan budaya organisasi sendiri melalui komunikasi yang baik dengan anggotanya. Untuk mendukung usaha mengembangkan budaya organisasi, harus ada perubaban pada kebijakan sumber daya manusia, terutama dalam rekrutmen dan seleksi karyawan. Kata kunci: transformasi, resistensi, budaya

  6. Perbandingan Akurasi Pengukuran Suhu Dan Kelembaban Antara Sensor DHT11 Dan DHT22

    OpenAIRE

    Saptadi, Arief Hendra

    2014-01-01

    Suhu dan kelembaban merupakan dua objek pengukuran yang acapkali terdapat di dalam sistem akuisisi data. Terdapat banyak piranti sensor yang berfungsi untuk mengukur dua objek tersebut dan akurasi merupakan salah satu parameter yang dapat digunakan untuk memilihnya. DHT11 dan DHT22 adalah sensor seri DHT dari Aosong Electronics yang dapat melakukan pengukuran suhu dan kelembaban secara serempak dengan keluaran digital. Informasi tentang akurasi terdapat di dalam lembar data keduanya. Kendati ...

  7. Pertumbuhan dan Mutu Fisik Bibit Jabon (Anthocephalus Cadamba Miq.) di Polibag dan Politub

    OpenAIRE

    Junaedi, Ahmad

    2010-01-01

    Informasi pertumbuhan dan mutu fisik bibit jabon (Anthocephalus cadamba Miq.) di wadah bibit dengan volume yang berbeda diperlukan sebagai bagian yang akan diperhitungkan dalam pemilihan wadah bibit yang akan digunakan. Penelitian ini dilakukan untuk mengetahui pertumbuhan dan mutu fisik bibit jabon yang disapih pada wadah bibit polibag (volume 300 cm3) dan politub (volume 60 cm3). Tahapan penelitian meliputi : pembibitan serta pengamatan pertumbuhan dan penilaian mutu fisik bibit jabon yang ...

  8. Dampak belanja irigasi dan jaringan terhadap output PDRB sektor pertanian dan pertumbuhan ekonomi Kota Jambi

    OpenAIRE

    Aminah, Siti; Parmadi, Parmadi

    2018-01-01

    Penelitian ini bertujuan untuk menganalisis perkembangan Belanja irigasi dan jaringan serta perkembangan output GDP sektor pertanian Kota Jambi selama periode tahun 2005-2015 dan menganalisis pengaruh belanja irigasi dan jaringan terhadap  GDP Output sektor pertanian dan pertumbuhan ekonomi Kota Jambi. Hasil penelitian menunjukkan Selama periode penelitian tahun 2005-2015 dengan rata-rata pertumbuhan 61,98%, nilai rata-rata PDRB harga berlaku Kota Jambi sebesar 157.601,68 dalam juta rupi...

  9. Numerical assessment of bone remodeling around conventionally and early loaded titanium and titanium-zirconium alloy dental implants.

    Science.gov (United States)

    Akça, Kıvanç; Eser, Atılım; Çavuşoğlu, Yeliz; Sağırkaya, Elçin; Çehreli, Murat Cavit

    2015-05-01

    The aim of this study was to investigate conventionally and early loaded titanium and titanium-zirconium alloy implants by three-dimensional finite element stress analysis. Three-dimensional model of a dental implant was created and a thread area was established as a region of interest in trabecular bone to study a localized part of the global model with a refined mesh. The peri-implant tissues around conventionally loaded (model 1) and early loaded (model 2) implants were implemented and were used to explore principal stresses, displacement values, and equivalent strains in the peri-implant region of titanium and titanium-zirconium implants under static load of 300 N with or without 30° inclination applied on top of the abutment surface. Under axial loading, principal stresses in both models were comparable for both implants and models. Under oblique loading, principal stresses around titanium-zirconium implants were slightly higher in both models. Comparable stress magnitudes were observed in both models. The displacement values and equivalent strain amplitudes around both implants and models were similar. Peri-implant bone around titanium and titanium-zirconium implants experiences similar stress magnitudes coupled with intraosseous implant displacement values under conventional loading and early loading simulations. Titanium-zirconium implants have biomechanical outcome comparable to conventional titanium implants under conventional loading and early loading.

  10. Wacana Penjarahan Dan Kekerasan Simbolik Terhadap Petani

    Directory of Open Access Journals (Sweden)

    Agus Sudibyo

    2002-01-01

    Full Text Available Perlawanan kaum petani sudah lama terjadi dalam konteks sejarah hubungan antara si kaya dan si miskin dan antara kaum petani dan negara. Persoralannya selalu bahwa negara, aparat keamanan dan pemilik modal telah mengambil alih secara paksa surplus ekonomi dari petani. Mereka bekerja sama dalam aksi penyerobotan tanah petani, pendirian perkebunan-perkebunan dan dalam menghadapi gerakan protes petani. Negara bukan hanya menghadapi gerakan perlawanan petani dengan represi-represi fisik. Secara sistematis negara juga melakukan propaganda dengan menciptakan gambaran-gambaran yang unfavourable tentang petani pelaku penjarahan dalam berbagai representasi wacana. Dalam batas tertentu, media massa justru memperkuat kecenderungan ini dengan menonjolkan dimensi kekerasan, pemberontakan dan anarkisme dalam mewacanakan aksi-aksi penjarahan petani.

  11. Motivasi, Kebiasaan, dan Keamanan Penggunaan Internet

    Directory of Open Access Journals (Sweden)

    Zinggara Hidayat

    2017-01-01

    Full Text Available Abstract: This study investigates motivation, habits, and security of internet use by high schools and universities students in Jakarta, Bogor, Depok, Tangerang, and Bekasi. This descriptive and quantitative reasearch uses survey method. The findings of the study show that the strongest motivation is to show self existence, entertainment, and academic purposes. At some points, the habit of using the internet also makes the students face some risks such as verbal and nonverbal abuses, bullying, pornoghrapy, account hacking, and the risk of interaction with unknown parties. Abstrak: Penelitian ini menyelidiki motivasi, kebiasaan, dan keamanan penggunaan internet di antara siswa sekolah menengah atas dan universitas di Jakarta, Bogor, Depok, Tangerang, dan Bekasi. Penelitian deskriptif kuantitatif ini menggunakan metode survei. Hasil penelitian menunjukkan bahwa motivasi paling kuat adalah untuk memperlihatkan eksistensi diri, pencarian hiburan, dan penyelesaian tugas akademis. Kebiasaan penggunaan internet oleh pelajar dan mahasiswa menghadapi beberapa risiko, seperti kekerasan verbal dan nonverbal,

  12. SOSIAL MEDIA DAN PERUBAHAN INDEKS PRESTASI MAHASISWA

    Directory of Open Access Journals (Sweden)

    Risnah Risnah

    2015-12-01

    Tujuan dari penelitian ini adalah mengetahui jumlah mahasiswa semester II, IV, dan VI Jurusan Keperawatan yang menggunakan internet secara aktif dan karak-teristiknya, membandingkan hasil belajar mahasiswa semester II-III, IV-V, dan VI-VII Jurusan Keperawatan, dan mengetahui pengaruh sosial media (facebook dan twitter terhadap perubahan indeks prestasi mahasiswa, dengan jumlah res-ponden sebanyak 150 orang. Penelitian ini adalah deskriptif dengan desain pene-litian kausal. Pengumpulan data dengan menggunakan instrumen berupa kuesio-ner, dengan jumlah responden sebanyak 150 orang. Adapun hasil penelitian me-nunjukkan bahwa indeks prestasi mahasiswa dengan penggunaan sosial media umumnya responden menyatakan sosial media tidak mempengaruhi indeks prestasi. Dari hasil analisis uji statistik diperoleh terdapat pengaruh antara sosial media (facebook dan twitter dengan indeks prestasi. Dengan begitu, penggunaan sosial media harus digunakan sebagaimana mestinya, agar mahasiswa/i yang ak-tif pengunaan sosial media tidak mempengaruhi indeks prestasinya.

  13. Persepsi Santri dan Kiai terhadap Pluralisme Agama di Pendidikan Ulama Tarjih Muhammadiyah (PUTM dan Aswaja Nusantara Yogyakarta

    Directory of Open Access Journals (Sweden)

    Zainal Arifin

    2017-05-01

    Abstrak: Perdebatan pluralisme agama masih mengemuka dalam konteks masyarakat majemuk di Nusantara. Bahkan, tidak jarang menimbulkan konflik dan perang pemikiran. Menarik melihat perspektif kiai dan santri Muhammadiyah dan NU terhadap isu pluralisme melalui praktik pendidikan di Ulama Tarjih Muhammadiyah (PUTM Yogyakarta dan Pondok Pesantren Aswaja Nusantara Yogyakarta yang dianggap representatif karena membawa muatan konsep, ide dan paradigma dari Muhammadiyah dan NU. Penelitian ini bersifat kualitatif,  data diperoleh dari wawancara dan studi kepustakaan dengan saling memberikan verifikasi, koreksi dan pelengkap. Hasil penelitian ini, PUTM dan Pesantren Aswaja Nusantara memiliki konsep yang sama dalam memegang teguh akidah, yakni sikap eksklusif dan menolak pluralisme secara teologis namun menerimanya secara sosiologis. Sehingga, paradigma dari dua lembaga tersebut merepresentasikan dari paradigma Muhammadiyah dan NU dalam merespon fenomena pluralisme agama dan budaya.

  14. VAKSIN DENGUE DAN PERKEMBANGANNYA SAAT INI DAN DI MASA MENDATANG

    Directory of Open Access Journals (Sweden)

    Triwibowo Ambar Garjito

    2012-09-01

    Full Text Available Dengue virus merupakan salah satu virus anggota dari famili Flaviviridae yang sejak tahun 1956 telah dikenal dapat menimbulkan demam dengue maupun demam berdarah dengue (DBD. Penyakit yang ditularkan oleh nyamuk Aedes aegypti ini diperkirakan telah menjangkiti pada selatar 50-100 juta manusia dengan 500.000 kasus di antaranya dalam manifestasi yang ganas yang dikenal sebagai dengue haemorrhagic fever dan dengue shock syndrome dan 25.000 di antaranya berakibat fatal (meninggal. Saat ini pengembangan vaksin merupakan salah satu solusi yang diharapkan dapat menekan penyebaran penyakit tersebut. E (envelope merupakan salah satu bagian dari protein struktural virus yang sangat penting dalam pengembangan vaksin, yaitu sebagai badan yang memproduksi antibodi netralisasi untuk protein. Non-struktural protein l juga telah diketahui sebagai salah satu komponen penting dalam pengembangan vaksin oleh karena kemampuannya untuk dapat diekspresi pada permukaan sel yang diinfeksi yang dapat menjadi target untuk immune cytolisis. Ada dua pendekatan yang digunakan dalam memproduksi suatu vaksin dengue, yaitu: a. Vaksin hidup yang telah dilemahkan (live attenuated vaccine: b. Vaksin hasil rekayasa (engineered vaccine. Penelitian terhadap vaksin DENV baik rekombinan maupun non-rekombinan yang didasarkan pada uji virus telah dilakukan secara terus-menerus baik pada monyet dan manusia. Sampai saat ini telah dikembangkan sejumlah kandidat vaksin DENV yang berdasar pada tetravalent virus dengue, yaitu a. vaksin konvensional, b. vaksin dengue rekombinan berdasar pada flavivirus, c. vaksin intertypic chimeric, d. vaksin chimerivac, e. vaksin dengue rekombinan menggunakan vector non-ftavivirus dan f. vector adenovirus. Namun demikian, sampai sekarang belum ada vaksin yang siap digunakan untuk menangkal infeksi ke empat serotype virus dengue, sehingga masih diharapkan untuk pengembangan virus lebih lanjut.   Kata kunci: Aedes aegypti, dengue virus, vaksin dengue.

  15. BAHAYA LATEN INFEKSI GONORE DAN KLAMIDIA DI ASIA SELATAN & ASIA TENGGARA, DI INDONESIA DAN KOTA MANADO

    Directory of Open Access Journals (Sweden)

    Aron Pirade

    2014-04-01

    menempati urutan tertinggi. Wilayah Asia Selatan dan Asia Timur-Selatan (juga disebut Asia Tenggara adalah wilayah dengan prevalensi Gonore dan Klamidia terbesar. Prevalensi Gonore di tahun 1995 dan 1999 yaitu 29.11 dan 27.2 juta penduduk wilayah Asia Selatan dan Asia Tenggara. Klamidia, di tahun 1995 dan tahun 1999 yaitu 40.48 dan 42.89 juta penduduk wilayah Asia Selatan dan Asia Tenggara. Di Indonesia sendiri, pada 11 area penelitian menunjukkan bahwa prevalensi Gonore dalam wilayah Indonesia menunjukkan rata-rata prosentasenya 20%-40% dari keseluruhan STI pada wanita beresiko tinggi terkena STI. Sedangkan infeksi oleh Klamidia prosentasenya 15%- 45% dari keseluruhan STI pada wanita beresiko tinggi terkena penyakit kelamin. Prosentase Gonore dan Klamidia di Kota Manado rata-rata 15-30%. Tingginya prevalensi infeksi Gonore dan Klamidia di Asia Tenggara, ternyata diikuti juga dengan tingginya perkembangan infeksi Gonore dan Klamidia di Indonesia dan Kota Manado.

  16. NCEP ATP III dan Framingham score

    OpenAIRE

    Hasan, Refli; Fahila, Reny

    2016-01-01

    Laporan ini merupakan Program Pendidikan Kolesterol National yang diperbaharui yaitu pedoman klinis untuk melakukan pengujian kolesterol dan manajemen. ATP III dibuat berdasarkan bukti dan laporan ekstensif yang akan menjadi referensi dan rekomendasi ilmiah. Laporan ATP III dapat dijadikan pedoman untuk pemberian terapi penurun kolesterol yang intensif dalam praktek. Pedoman ini hanya sebagai informasi , tidak dapat mempengaruhi secara mutlak dalam penilaian klinis dokter yang akhirnya menent...

  17. STUDI BANDING PELAPISAN MATERIAL SKD11 DENGAN METODE PHYSICAL VAPOUR DEPOSITION DAN THERMAL DIFUSION PADA KOMPONEN INSERT DIES MESIN STAMPING PRESS

    Directory of Open Access Journals (Sweden)

    Robertus Suryo Bisono

    2017-02-01

    Full Text Available Telah dilakukan pelapisan menggunakan Titanium Alumunium Nitrid (TIAlN dengan metode PVD Coating (Physical Vapour Diposition dan TD (Thermal Difusion  untuk perlakuan permukaan baja perkakas SKD11 sebagai material Insert Die komponen mesin Stamping Press setelah perlakuan hardening. Perlakuan permukaan dimaksudkan untuk meningkatkan kualitas permukaan khususnya kekerasan dan perubahan struktur mikro yang terjadi. Untuk mengetahui tingkat keberhasilan dari perlakuan permukaan tersebut dilakukan dengan memvariasi waktu proses, masing masing 2 sample diproses pada 4 jam, 5 jam dan 6 jam dengan temperatur  proses masing-masing  400ᴼ C. Kemudian satu dari tiap variable sample tersebut di panaskan pada suhu 1000ᴼ C selama 1 jam, pendinginan dilalukan dengan udara bebas tanpa proses quenching Untuk mengetahui hasilnya dilakukan uji kekerasan mikro Vickers, pengamatan struktur mikro Scanning Eectron Microscope (SEM, dan pengujian komposisi dengan Energy Defersif Sepectroscopy (EDS untuk mengetahui tingkat penyerapan material terdifusi. Hasil menunjukan bahwa SKD11 yang dilapisi TiAlN dengan metode PVD selama 6 jam menghasilkan lapisan yang paling keras yaitu 1363 HV dengan ketebalan lapisan 5,3µm. Proses pemanasan 1000⁰C selama 1 jam pada sample mengakibatkan penurunan kekerasan sample dan lapisan permukaan sample menjadi lebih tebal hingga 50µm. Penambahan lapisan diakibatkan oleh terdifusinya atom atom yang menyusun lapisan TiAlN ke dalam substrat serta keluarnya atom atom penyusun lapisan hingga membentuk lapisan kompleks.

  18. DESAIN, TATA LETAK, DAN KONSTRUKSI TAMBAK

    Directory of Open Access Journals (Sweden)

    Akhmad Mustafa

    2008-12-01

    Full Text Available Komoditas yang umum dibudidayakan di tambak Indonesia adalah udang dan ikan bandeng yang menjadi komoditas unggulan untuk dikembangkan. Salah satu faktor penting yang sangat menentukan keberhasilan usaha budidaya tambak adalah rekayasa tambak yang mencakup disain, tata letak, dan konstruksi tambak. Secara umum, desain petakan tambak merupakan perencanaan bentuk tambak yang meliputi: ukuran panjang dan lebar petakan, kedalaman, ukuran pematang, ukuran berm, dan ukuran saluran keliling, serta ukuran dan letak pintu air. Tata letak suatu unit tambak harus memenuhi tujuan seperti: menjamin kelancaran mobilitas operasional sehari-hari, menjamin kelancaran dan keamanan pasok air, serta pembuangannya, dapat menekan biaya konstruksi tanpa mengurangi fungsi teknis dari unit tambak yang dibangun dan mempertahankan kelestarian lingkungan. Konstruksi tambak yang menggambarkan proses pengerjaan tambak harus disesuaikan dengan desain dan tata letak yang telah ada. Rekayasa tambak diarahkan pada kemampuan untuk menciptakan kondisi yang sesuai dengan keadaan alami yang dituntut oleh organisme akuatik yang dibudidayakan sehingga produktivitas tambak meningkat, efisien secara ekonomis, dan berkelanjutan.

  19. KONTEKTUALISASI DAN (KEMUNGKINAN KONSEKUENSINYA BAGI PSIKOLOGI

    Directory of Open Access Journals (Sweden)

    Prof. Supratiknya

    2015-09-01

    jaran di perguruan tinggi seperti kita kenal sekarang (selanjutnya disebut psikologi, lahir di Jerman pada penghujung abad ke‐19. Selanjutnya psikologi berkembang pesat di Amerika Utara khususnya Amerika Serikat dan negara‐negara lain di Eropa yang lebih dulu mengalami industrialisasi khususnya di Eropa Barat. 1 Alhasil, paling tidak sampai dasawarsa 1980‐an perkembangan dan persebaran psikologi di tingkat global ditandai oleh ketimpangan di antara apa yang oleh Moghaddam (1987 disebut tiga dunia tempat psikologi dikembangkan dan dipraktekkan, disimak antara lain berdasarkan besarnya produksi pengetahuan psikologis yang disebarluaskan melalui penyelenggaraan pendidikan tinggi psikologi maupun lewat publikasi ilmiah berupa baik berkala maupun buku rujukan dan buku teks.

  20. High pressure sintering (HP-HT) of diamond powders with titanium and titanium carbide

    International Nuclear Information System (INIS)

    Jaworska, L.

    1999-01-01

    Polycrystalline diamond compacts for cutting tools are mostly manufactured using high pressure sintering (HP-HT). The standard diamond compacts are prepared by diamond powders sintering with metallic binding phase. The first group of metallic binder are metals able to solve carbon - Co, Ni. The second group of metal binders are carbide forming elements - Ti, Cr, W and others. The paper describes high pressure sintering of diamond powder with titanium and nonstoichiometry titanium carbide for cutting tool application. A type of binding phase has the significant influence on microstructure and mechanical properties of diamond compacts. Very homogeneous structure was achieved in case of compacts obtained from metalized diamond where diamond-TiC-diamond connection were predominant. In the case of compacts prepared by mechanical mixing of diamond with titanium powders the obtained structure was nonhomogeneous with titanium carbide clusters. They had more diamond to diamond connections. These compacts compared to the compact made of metallized diamond have greater wear resistance. In the case of the diamond and TiC 0.92 sintering the strong bonding of TiC diamond grains was obtained. The microstructure observations for diamond with 5% wt. Ti and diamond with 5% wt. TiC 0.92 (the initial composition) compacts were performed in transmission microscope. For two type of compacts the strong bonding phase TiC without defects is creating. (author)

  1. Formation of titanium nitride layers on titanium metal: Results of XPS and AES investigations

    International Nuclear Information System (INIS)

    Moers, H.; Pfennig, G.; Klewe-Nebenius, H.; Penzhorn, R.D.; Sirch, M.; Willin, E.

    1988-09-01

    The reaction of titanium metal with gaseous nitrogen and ammonia at temperatures of 890 0 C leads to the formation of nitridic overlayers on the metallic substrate. The thicknesses of the overlayers increase with increasing reaction time. Under comparable conditions ammonia reacts much slower than nitrogen. XPS and AES depth profile analyses show continuous changes of the in-depth compositions of the overlayers. This can be interpreted in terms of a very irregular thickness of the overlayers, an assumption which is substantiated by local AES analyses and by the observation of a pronounced crystalline structure of the substrate after annealing pretreatment, which can give rise to locally different reaction rates. The depth profile is also influenced by the broad ranges of stability of the titanium nitride phases formed during the reaction. The quantitative analysis of the titanium/nitrogen overlayers by AES is difficult because of the overlap of titanium and nitrogen Auger peaks. In quantitative XPS analysis problems arise due to difficulties in defining Ti 2p peak areas. This work presents practical procedures for the quantitative evaluation by XPS and AES of nitridic overlayers with sufficient accuracy. (orig.) [de

  2. In situ formation of titanium carbide using titanium and carbon-nanotube powders by laser cladding

    International Nuclear Information System (INIS)

    Savalani, M.M.; Ng, C.C.; Li, Q.H.; Man, H.C.

    2012-01-01

    Titanium metal matrix composite coatings are considered to be important candidates for high wear resistance applications. In this study, TiC reinforced Ti matrix composite layers were fabricated by laser cladding with 5, 10, 15 and 20 wt% carbon-nanotube. The effects of the carbon-nanotube content on phase composition, microstructure, micro-hardness and dry sliding wear resistance of the coating were studied. Microstructural observation using scanning electron microscopy showed that the coatings consisted of a matrix of alpha-titanium phases and the reinforcement phase of titanium carbide in the form of fine dendrites, indicating that titanium carbide was synthesized by the in situ reaction during laser irradiation. Additionally, measurements on the micro-hardness and dry sliding wear resistance of the coatings indicated that the mechanical properties were affected by the amount of carbon-nanotube in the starting precursor materials and were enhanced by increasing the carbon-nanotube content. Results indicated that the composite layers exhibit high hardness and excellent wear resistance.

  3. Titanium and titanium alloy creep (a bibliography with abstracts). Report for 1964--Jun 1976

    International Nuclear Information System (INIS)

    Smith, M.F.

    1976-08-01

    Research is cited on creep of titanium and its alloys with regard to composition, stress corrosion, fracture, microstructure and tests. Many reports deal with applications to aircraft, spacecraft, and nuclear reactors. (This updated bibliography contains 133 abstracts, 24 of which are new entries to the previous edition.)

  4. In situ formation of titanium carbide using titanium and carbon-nanotube powders by laser cladding

    Energy Technology Data Exchange (ETDEWEB)

    Savalani, M.M., E-mail: mmfsmm@inet.polyu.edu.hk [Department of Industrial and Systems Engineering, Hong Kong Polytechnic University (Hong Kong); Ng, C.C.; Li, Q.H.; Man, H.C. [Department of Industrial and Systems Engineering, Hong Kong Polytechnic University (Hong Kong)

    2012-01-15

    Titanium metal matrix composite coatings are considered to be important candidates for high wear resistance applications. In this study, TiC reinforced Ti matrix composite layers were fabricated by laser cladding with 5, 10, 15 and 20 wt% carbon-nanotube. The effects of the carbon-nanotube content on phase composition, microstructure, micro-hardness and dry sliding wear resistance of the coating were studied. Microstructural observation using scanning electron microscopy showed that the coatings consisted of a matrix of alpha-titanium phases and the reinforcement phase of titanium carbide in the form of fine dendrites, indicating that titanium carbide was synthesized by the in situ reaction during laser irradiation. Additionally, measurements on the micro-hardness and dry sliding wear resistance of the coatings indicated that the mechanical properties were affected by the amount of carbon-nanotube in the starting precursor materials and were enhanced by increasing the carbon-nanotube content. Results indicated that the composite layers exhibit high hardness and excellent wear resistance.

  5. Comparison of titanium cable tension band and nickel-titanium patella concentrator for patella fractures.

    Science.gov (United States)

    Zhao, Quan-Ming; Gu, Xiao-Feng; Cheng, Li; Feng, De-Hong

    2017-07-01

    Patellar fractures account for approximately 1% of all fractures. Due to the patella's importance as regards the extensor mechanism, effort should be made to preserve the patella. Several operative treatment methods have been introduced for patella fractures. This study aims to compare the clinical effect of a titanium cable tension band and nickeltitanium (NiTi) patella concentrator (NT-PC) in treating patella fractures. Thirty-nine patients with patella fractures were enrolled in this retrospective study. All the patients were treated via the open reduction internal fixation procedure using a titanium cable tension band or NT-PC. All the patients were followed up over an average period of 13 months. The main outcome measures were operation time, time of fracture union, postoperative complications, and Böstman knee scores. Statistical analyses were conducted between the 2 groups. All the patients were operated on successfully. The operation time of the NT-PC treatment group was less than that of the titanium cable tension band treatment group (p cable tension band and NT-PC groups, respectively. No significant difference was observed between the excellent and good results (p > 0.05). Both titanium cable tension band and NT-PC showed good efficacy for the treatment of patellar fractures. NT-PC fixation, a new option for the treatment of patella fractures, is a simple and effective fixation method.

  6. Kinetic study of synthesis of Titanium carbide by methano thermal reduction of Titanium dioxide

    International Nuclear Information System (INIS)

    Alizadeh, R.; Ostrovski, O.

    2011-01-01

    Reduction of the Titanium dioxide, TiO 2 , by methane was investigated in this work. The thermodynamic of reaction was examined and found favorable. The reaction of titanium dioxide with methane was carried out in the temperature range 1150 d egree C to 1450 d egree C at atmospheric pressure with industrial high porosity pellets prepared from titanium dioxide powder. The evolved gas analyzing method was used for determination of the extent of reduction rate. The gas products of the reaction are mostly CO and trace amount of CO 2 and H 2 O. The synthesized product powder was characterized by X-ray diffraction for elucidating solid phase compositions. The effect of varying temperature was studied during the reduction. The conversion-time data have been interpreted by using the grain model. For first order reaction with respect to methane concentration, the activation energy of titanium dioxide reduction by methane is found to be 51.4 kcal/g mole. No detailed investigation of kinetic and mechanism of the reaction was reported in literatures.

  7. TASAWUF DAN TANTANGAN PERUBAHAN SOSIAL

    Directory of Open Access Journals (Sweden)

    Yusno Abdullah Otta

    2010-12-01

    Full Text Available Abstract: Sufism in the eras of globalization and information often faces considerable challenges. The function and role of religion in modern life have in some aspects diminished, including sufism because it is claimed to have played no or less role in resolving problems nor stimulating social change. As one of Islamic traditions, sufism makes ihsan as its essential teaching. By this concept, sufism encourages humans to pray to God wholeheartedly. Sufism is now required to show its own existence and function by making fundamental contribution for modern life, an era which differ socio-culturally from the one when sufism firstly emerged. Sufism thus needs to adapt itself to the changes in the era of information and globalization so that it will remain relevant and suitable for human progress. Sufism needs to release itself from its exclusivism and to avoid being trapped in its own logic, namely speculative-trancendentalism Abstrak: Tasawuf di era globalisasi dan informasi seperti saat ini tengah menghadapi tantangan yang sangat berat. Kehidupan modern sudah sampai pada taraf tidak lagi mempercayai fungsi dan peran agama, termasuk di dalamnya tasawuf, sebagai ‘sesuatu’ yang dapat memberikan solusi bagi perubahan sosial. Sebagai manifestasi paripurna dari ajaran Islam, tasawuf berintikan pada konsep Ihsān yang mengajarkan untuk beribadah kepada Sang Pencipta secara ikhlas. Untuk menunjukkan eksistensinya, tasawuf dituntut peran aktifnya secara konstruktif-solutif terhadap berbagai kebutuhan manusia modern yang amat berbeda dengan setting maupun struktur masyarakat pada saat tasawuf “dilahirkan” pada zamannya. Tasawuf dituntut untuk memerlukan “baju” baru di era informasi yang kerap berubah ini, agar tetap realible dan suitable dengan kemajuan zaman. Hal itu dapat dilakukan dengan berusaha “keluar” dari eksklusifismenya dengan meminjam tradisi filsafat analitik pasca positivisme dan tradisi eksistensialis serta dinamika filsafat

  8. Analisis Kinerja EIGRP dan OSPF pada Topologi Ring dan Mesh

    Directory of Open Access Journals (Sweden)

    DWI ARYANTA

    2014-01-01

    Full Text Available ABSTRAK EIGRP (Enhanced Interior Gateway Routing Protocol dan OSPF (Open Shortest Path Fisrt adalah routing protokol yang banyak digunakan pada suatu jaringan komputer. EIGRP hanya dapat digunakan pada perangkat Merk CISCO, sedangkan OSPF dapat digunakan pada semua merk jaringan. Pada penelitian ini dibandingkan delay dan rute dari kedua routing protokol yang diimplementasikan pada topologi Ring dan Mesh. Cisco Packet Tracer 5.3 digunakan untuk mensimulasikan kedua routing protokol ini. Skenario pertama adalah perancangan jaringan kemudian dilakukan pengujian waktu delay 100 kali dalam 5 kasus. Skenario kedua dilakukan pengujian trace route untuk mengetahui jalur yang dilewati paket data lalu memutus link utama. Pada skenario kedua juga dilakukan perbandingan nilai metric dan cost hasil simulasi dengan perhitungan rumus. Skenario ketiga dilakukan pengujian waktu konvergensi untuk setiap routing protokol pada setiap topologi. Hasilnya EIGRP lebih cepat 386 µs daripada OSPF untuk topologi Ring sedangkan OSPF lebih cepat 453 µs daripada EIGRP untuk topologi Mesh. Hasil trace route menunjukan rute yang dipilih oleh routing protokol yaitu nilai metric dan cost yang terkecil. Waktu konvergensi rata-rata topologi Ring pada EIGRP sebesar 12,75 detik dan 34,5 detik pada OSPF sedangkan topologi Mesh di EIGRP sebesar 13 detik dan 35,25 detik di OSPF. Kata Kunci: EIGRP, OSPF, Packet Tracer 5.3, Ring, Mesh, Konvergensi ABSTRACT EIGRP (Enhanced Interior Gateway Routing Protocol and OSPF (Open Shortest Path Fisrt is the routing protocol that is widely used in a computer network. EIGRP can only be used on devices Brand CISCO, while OSPF can be used on all brands of network. In this study comparison of both the delay and the routing protocol implemented on Ring and Mesh topology. Cisco Packet Tracer 5.3 is used to simulate both the routing protocol. The first scenario is the design of the network and then do the test of time delay 100 times in 5 cases. The

  9. Analisis Kinerja EIGRP dan OSPF pada Topologi Ring dan Mesh

    Directory of Open Access Journals (Sweden)

    DWI ARYANTA

    2016-02-01

    Full Text Available ABSTRAK EIGRP (Enhanced Interior Gateway Routing Protocol dan OSPF (Open Shortest Path Fisrt adalah routing protokol yang banyak digunakan pada suatu jaringan komputer. EIGRP hanya dapat digunakan pada perangkat Merk CISCO, sedangkan OSPF dapat digunakan pada semua merk jaringan. Pada penelitian ini dibandingkan delay dan rute dari kedua routing protokol yang diimplementasikan pada topologi Ring dan Mesh. Cisco Packet Tracer 5.3 digunakan untuk mensimulasikan kedua routing protokol ini. Skenario pertama adalah perancangan jaringan kemudian dilakukan pengujian waktu delay 100 kali dalam 5 kasus. Skenario kedua dilakukan pengujian trace route untuk mengetahui jalur yang dilewati paket data lalu memutus link utama. Pada skenario kedua juga dilakukan perbandingan nilai metric dan cost hasil simulasi dengan perhitungan rumus. Skenario ketiga dilakukan pengujian waktu konvergensi untuk setiap routing protokol pada setiap topologi. Hasilnya EIGRP lebih cepat 386 µs daripada OSPF untuk topologi Ring sedangkan OSPF lebih cepat 453 µs daripada EIGRP untuk topologi Mesh. Hasil trace route menunjukan rute yang dipilih oleh routing protokol yaitu nilai metric dan cost yang terkecil. Waktu konvergensi rata-rata topologi Ring pada EIGRP sebesar 12,75 detik dan 34,5 detik pada OSPF sedangkan topologi Mesh di EIGRP sebesar 13 detik dan 35,25 detik di OSPF. Kata Kunci : EIGRP, OSPF, Packet Tracer 5.3, Ring, Mesh, Konvergensi ABSTRACT EIGRP (Enhanced Interior Gateway Routing Protocol and OSPF (Open Shortest Path Fisrt is the routing protocol that is widely used in a computer network. EIGRP can only be used on devices Brand CISCO, while OSPF can be used on all brands of network. In this study comparison of both the delay and the routing protocol implemented on Ring and Mesh topology. Cisco Packet Tracer 5.3 is used to simulate both the routing protocol. The first scenario is the design of the network and then do the test of time delay 100 times in 5 cases. The

  10. Effects of thickness on electronic structure of titanium thin films

    Indian Academy of Sciences (India)

    using near-edge X-ray absorption fine structure (NEXAFS) technique at titanium L2,3 edge in total electron yield .... the contribution of titanium L2,3 levels to the absorption co- ... all absorption coefficient of a sample is related to the atomic.

  11. Spark plasma sintering of titanium aluminide intermetallics and its composites

    Science.gov (United States)

    Aldoshan, Abdelhakim Ahmed

    Titanium aluminide intermetallics are a distinct class of engineering materials having unique properties over conventional titanium alloys. gamma-TiAl compound possesses competitive physical and mechanical properties at elevated temperature applications compared to Ni-based superalloys. gamma-TiAl composite materials exhibit high melting point, low density, high strength and excellent corrosion resistance. Spark plasma sintering (SPS) is one of the powder metallurgy techniques where powder mixture undergoes simultaneous application of uniaxial pressure and pulsed direct current. Unlike other sintering techniques such as hot iso-static pressing and hot pressing, SPS compacts the materials in shorter time (< 10 min) with a lower temperature and leads to highly dense products. Reactive synthesis of titanium aluminide intermetallics is carried out using SPS. Reactive sintering takes place between liquid aluminum and solid titanium. In this work, reactive sintering through SPS was used to fabricate fully densified gamma-TiAl and titanium aluminide composites starting from elemental powders at different sintering temperatures. It was observed that sintering temperature played significant role in the densification of titanium aluminide composites. gamma-TiAl was the predominate phase at different temperatures. The effect of increasing sintering temperature on microhardness, microstructure, yield strength and wear behavior of titanium aluminide was studied. Addition of graphene nanoplatelets to titanium aluminide matrix resulted in change in microhardness. In Ti-Al-graphene composites, a noticeable decrease in coefficient of friction was observed due to the influence of self-lubrication caused by graphene.

  12. Radiolysis of titanium potassium oxalate in aqueous solution. [. gamma. rays

    Energy Technology Data Exchange (ETDEWEB)

    Bundo, Y; Ono, I [Industrial Research Inst. of Kanagawa Prefecture, Yokohama (Japan); Ogawa, T

    1975-01-01

    The dissolution state of titanium potassium oxalate in aqueous solution is different according to the pH. The yellowish brown titanium complex produced by the reaction of titanium potassium oxalate and hydrogen peroxide seems to be different in its structure according to the pH. Considering these points, gamma-ray irradiation was carried out on the sample by dissolving titanium potassium oxalate in purified water under the conditions of oxygen saturation and nitrogen saturation, and the relation between irradiation dose and the production of titanium complex was determined. On the basis of the experimental result, the mechanism of forming hydrogen peroxide was presumed. The radiation source used was 2,000 Ci of /sup 60/Co. For photometric analysis, a 139 type photoelectric spectrophotometer of Hitachi Ltd. was used. From the experimental results, in neutral water, titanium potassium oxalate exists in the state that two oxalic acid ions are coordinated to titanyl ion, while in case of the pH lowered by the addition of sulfuric acid, it can exist in the state that one oxalic acid ion is coordinated to titanyl ion. The yield of hydrogen peroxide produced by irradiating titanium potassium oxalate aqueous solution with gamma-ray is the sum of the molecular product from water and the radiolysis product from titanium potassium oxalate.

  13. Classification of titanium dioxide; Clasificacion del dioxido de titanio

    Energy Technology Data Exchange (ETDEWEB)

    Macias B, L.R. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico); Garcia C, R.M.; Maya M, M.E. [Secretaria de Hacienda y Credito Publico de Mexico, Mexico (Mexico); Ita T, A. De [Universidad Autonoma Metropolitana Azcapotzalco, Mexico (Mexico); Palacios G, J. [Instituto Politecnico Nacional (Mexico)

    2002-07-01

    In this work the X-ray diffraction (XRD), Scanning Electron Microscopy (Sem) and the X-ray Dispersive Energy Spectroscopy techniques are used with the purpose to achieve a complete identification of phases and mixture of phases of a crystalline material as titanium dioxide. The problem for solving consists of being able to distinguish a sample of titanium dioxide being different than a titanium dioxide pigment. A standard sample of titanium dioxide with NIST certificate is used, which indicates a purity of 99.74% for the TiO{sub 2}. The following way is recommended to proceed: a)To make an analysis by means of X-ray diffraction technique to the sample of titanium dioxide pigment and on the standard of titanium dioxide waiting not find differences. b) To make a chemical analysis by the X-ray Dispersive Energy Spectroscopy via in a microscope, taking advantage of the high vacuum since it is oxygen which is analysed and if it is concluded that the aluminium oxide appears in a greater proportion to 1% it is established that is a titanium dioxide pigment, but if it is lesser then it will be only titanium dioxide. This type of analysis is an application of the nuclear techniques useful for the tariff classification of merchandise which is considered as of difficult recognition. (Author)

  14. Microwave assisted scalable synthesis of titanium ferrite nanomaterials

    Science.gov (United States)

    Shukla, Abhishek; Bhardwaj, Abhishek K.; Singh, S. C.; Uttam, K. N.; Gautam, Nisha; Himanshu, A. K.; Shah, Jyoti; Kotnala, R. K.; Gopal, R.

    2018-04-01

    Titanium ferrite magnetic nanomaterials are synthesized by one-step, one pot, and scalable method assisted by microwave radiation. Effects of titanium content and microwave exposure time on size, shape, morphology, yield, bonding nature, crystalline structure, and magnetic properties of titanium ferrite nanomaterials are studied. As-synthesized nanomaterials are characterized by X-ray diffraction (XRD), ultraviolet-visible absorption spectroscopy (UV-Vis), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), Raman spectroscopy, transmission electron microscopy (TEM), and vibrating sample magnetometer measurements. XRD measurements depict the presence of two phases of titanium ferrite into the same sample, where crystallite size increases from ˜33 nm to 37 nm with the increase in titanium concentration. UV-Vis measurement showed broad spectrum in the spectral range of 250-600 nm which reveals that its characteristic peaks lie between ultraviolet and visible region; ATR-FTIR and Raman measurements predict iron-titanium oxide structures that are consistent with XRD results. The micrographs of TEM and selected area electron diffraction patterns show formation of hexagonal shaped particles with a high degree of crystallinity and presence of multi-phase. Energy dispersive spectroscopy measurements confirm that Ti:Fe compositional mass ratio can be controlled by tuning synthesis conditions. Increase of Ti defects into titanium ferrite lattice, either by increasing titanium precursor or by increasing exposure time, enhances its magnetic properties.

  15. Hydroxyapatite coating by biomimetic method on titanium alloy ...

    Indian Academy of Sciences (India)

    Home; Journals; Bulletin of Materials Science; Volume 28; Issue 6. Hydroxyapatite coating by biomimetic method on titanium alloy using concentrated SBF. S Bharati M K Sinha ... Optical microscopic and SEM observations revealed the deposition of Ca–P layer on the titanium alloy by both the methods. Thickness of coating ...

  16. IMMUNOTOXICOLOGICAL ASPECTS OF BIOCOMPATIBILITY OF TITANIUM

    Directory of Open Access Journals (Sweden)

    Maya Lyapina

    2017-05-01

    Full Text Available Titanium (Ti is a non-essential metal element. TiO2 is used predominantly in the form of micro and nanoparticles in consumer products, including cosmetics and food. Because of its excellent biocompatibility, the trade-pure titan and its alloys are widely used as an alternative to certain metals in invasive medicine, surgery, dental medicine. Contemporary data concerning the sources of exposure to titanium, immune reactions to Ti alloys, current knowledge and perspectives of diagnosis of sensitization or allergic reactions to titanium are discussed. Conclusion: TiO2 is much more stable than pure Ti and alloys used in the implants, that should be taken into account when conducting research and analysing the results. The evidence of possible toxic effects is insufficient. It is difficult to assess the frequency of Ti allergy due to the uncertainty of diagnostic methods, but it is believed that it is very low. This is supported by the evidence that Ti and TiO2 (often as NP doesn’t penetrate through the healthy skin. Skin patch testing with currently available formulations of Ti and TiO2 has no significant value in clinical practice, and currently, it is assumed that there is no reliable method for diagnosis Ti allergy. The functional analysis of cytokine release and investigation of genetic characteristics could be useful for individual risk assessment in dental implantology. Such studies may also help to investigate separately early and late implant loss, as well as to develop new diagnostic tools.

  17. Antibacterial iodine-supported titanium implants.

    Science.gov (United States)

    Shirai, T; Shimizu, T; Ohtani, K; Zen, Y; Takaya, M; Tsuchiya, H

    2011-04-01

    Deep infection remains a serious complication in orthopedic implant surgery. In order to reduce the incidence of implant-associated infections, several biomaterial surface treatments have been proposed. This study focused on evaluating the antibacterial activity of iodine-supported titanium (Ti-I(2)) and its impact on post-implant infection, as well as determining the potential suitability of Ti-I(2) as a biomaterial. External fixation pins were used in this experiment as trial implants because of the ease of making the septic models. The antibacterial activity of the metal was measured using a modification of the Japanese Industrial Standards method. Activity was evaluated by exposing the implants to Staphylococcus aureus or Escherichia coli and comparing reaction of pathogens to Ti-I(2) vs. stainless steel and titanium controls. Ti-I(2) clearly inhibited bacterial colonization more than the control metals. In addition, cytocompatibility was assessed by counting the number of colonies that formed on the metals. The three metals showed the same amount of fibroblast colony formation. Japanese white rabbits were used as an in vivo model. Three pins were inserted into both femora of six rabbits for histological analysis. Pin sites were inspected and graded for infection and inflammation. Fewer signs of infection and inflammatory changes were observed in conjunction with the Ti-I(2) pins. Furthermore, osteoconductivity of the implant was evaluated with osteoid formation surface of the pin. Consecutive bone formation was observed around the Ti-I(2) and titanium pins, while little osteoid formation was found around the stainless steel pins. These findings suggest that Ti-I(2) has antimicrobial activity and exhibits cytocompatibility. Therefore, Ti-I(2) substantially reduces the incidence of implant infection and shows particular promise as a biomaterial. Copyright © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

  18. KEJAHATAN PORNOGRAFI Upaya Pencegahan dan Penanggulangannya di Kabupaten Ponorogo

    Directory of Open Access Journals (Sweden)

    Irma Rumtianing Uswatul Hanifah

    2013-12-01

    Full Text Available Pemerintah telah mengeluarkan undang-undang No 44 Tahun 2008 tentang pornografi. Tujuan dari undang-undang tersebut salah satunya mewujudkan dan memelihara tatanan kehidupan masyarakat yang beretika, berkepribadian luhur, menjungjung tinggi nilai-nilai Ketuhanan Yang Maha Esa, serta menghormati harkat dan martabat kemanusiaan. Dalam perkembangannya, materi pornografi mengalami pertumbuhan dan penyebaran yang pesat seiring dengan perkembangan dan kemajuan teknologi informasi dan komunikasi. Peredaran dan penyebaran film porno kini semakin pesat karena ditopang dengan kecanggihan sarana informasi dan komunikasi salah satunya media internet yang bisa diakses oleh masyarakat pada setiap saat. Tulisan berikut akan mengkaji bagaimana upaya dan trategi yang dilakukan oleh Pemerintah Kabupaten Ponorogo dalam mencegah dan menanggulangi kejahatan pornografi di Kabupaten Ponorogo, apa hambatan dan bagaimana solusi dalam pencegahan serta penanggulangan kejahatan pornografi di Kabupaten Ponorogo serta bagaimana formulasi kebijakan untuk pencegahan dan penanggulangan kejahatan pornografi di Kabupaten Ponorogo. Kata kunci: Pornografi, Polres, KP3A

  19. UV photofunctionalization promotes nano-biomimetic apatite deposition on titanium

    Directory of Open Access Journals (Sweden)

    Saita M

    2016-01-01

    Full Text Available Makiko Saita,1 Takayuki Ikeda,1,2 Masahiro Yamada,1,3 Katsuhiko Kimoto,4 Masaichi Chang-Il Lee,5 Takahiro Ogawa1 1Division of Advanced Prosthodontics, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA; 2Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Yokosuka, Japan; 3Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan; 4Department of Prosthodontics and Oral Rehabilitation, 5Yokosuka-Shonan Disaster Health Emergency Research Center and ESR Laboratories, Kanagawa Dental University Graduate School of Dentistry, Yokosuka, Japan Background: Although biomimetic apatite coating is a promising way to provide titanium with osteoconductivity, the efficiency and quality of deposition is often poor. Most titanium implants have microscale surface morphology, and an addition of nanoscale features while preserving the micromorphology may provide further biological benefit. Here, we examined the effect of ultraviolet (UV light treatment of titanium, or photofunctionalization, on the efficacy of biomimetic apatite deposition on titanium and its biological capability.Methods and results: Micro-roughed titanium disks were prepared by acid-etching with sulfuric acid. Micro-roughened disks with or without photofunctionalization (20-minute exposure to UV light were immersed in simulated body fluid (SBF for 1 or 5 days. Photofunctionalized titanium disks were superhydrophilic and did not form surface air bubbles when immersed in SBF, whereas non-photofunctionalized disks were hydrophobic and largely covered with air bubbles during immersion. An apatite-related signal was observed by X-ray diffraction on photofunctionalized titanium after 1 day of SBF immersion, which was equivalent to the one observed after 5 days of immersion of control titanium. Scanning electron microscopy revealed nodular apatite deposition

  20. [The bonding characteristic of titanium and RG experiment porcelain].

    Science.gov (United States)

    Ren, Wei-hong; Guo, Tian-wen; Tian, Jie-mo; Zhang, Yun-long

    2003-07-01

    To study the bonding characteristic of Titanium and RG experiment porcelain. 5 specimens with a size of 10 mm x 5 mm x 1.4 mm were cast from pure titanium. Then 1 mm of RG experiment opaque and body porcelain were fused on the surface of the titanium specimens. The interface of titanium and porcelain was analyzed with a scanning electron microscope with energy-despersive spectrometry; 6 metal specimens with the size of 25 mm x 3 mm x 0.5 mm were cast from Ni-Cr alloy and a uniform thickness of 1 mm of VMK 99 porcelain was veneered on the central area of 8 mm x 3 mm 18 metal specimens as the same size were cast from pure titanium. The uniform thickness of 1 mm of VITA TITANKERAMIK porcelain, of Noritake super porcelain Ti-22 and of RG experiment porcelain were veneered on every 6 specimens respectively in the central area of 8 mm x 3 mm. The specimens were subjected to a three-point bending test on a load-test machine with a span of 20 mm, then the failure loads were recorded and statistically analysised. The RG porcelain/titanium crown was fabricated by fusing RG opaque porcelain and body porcelain to cast titanium substrate crown. The SEM results show no porosity and crackle were found in the interface. The energy-dispersive spectrometry show that there are Si, Ti and O in the 1 micro m layer between porcelain and titanium, which suggesting titanium and experiment porcelain bonding well. The three point test showed the fracture force for the combinations of titanium/VITA TITANKERAMIK porcelain, titanium/Noritake super porcelain Ti-22 and titanium/RG experiment porcelain were (7.233 +/- 2.539) N, (5.533 +/- 1.199) N and (6.316 +/- 1.433) N respectively. There were not statistically significant differences among them (t test, P porcelain combination (12.733 +/- 3.297) N was significantly greater than those of the cast titanium/porcelain (t test, P > 0.05). The crown was translucent with no crack. RG porcelain is well compatible with titanium.

  1. KANDUNGAN ASAM AMINO, TAURIN, MINERAL MAKRO-MIKRO, DAN VITAMIN B12 UBUR-UBUR (Aurelia aurita SEGAR DAN KERING

    Directory of Open Access Journals (Sweden)

    - - Nurjanah

    2014-06-01

    Full Text Available Tujuan penelitian adalah menentukan komposisi gizi, asam amino, taurin, mineral makro dan mikro,dan vitamin B12 pada ubur-ubur (Aurelia aurita segar dan kering. Asam amino esensial pada ubur-uburyaitu arginina, leusina, valina, treonina, lisina, isoleusina, fenilalanina, metionina, dan histidina, sedangkanasam amino non esensial yaitu asam glutamat, glisina, asam aspartat, serina, alanina, dan tirosina. Asamamino esensial tertinggi segar dan kering adalah arginina sebesar 1,72% (bk dan 1,44% (bk dan terendahhistidina yaitu sebesar 0,19% (bk dan 0,13% (bk. Asam amino non esensial segar dan kering tertinggiadalah asam glutamat dan glisina yaitu sebesar 3,26% (bk dan 2,62% (bk dan terkecil tirosina sebesar0,38% (bk dan 0,41% (bk. Taurin segar sebesar 2,68% (bk dan kering sebesar 0,67% (bk. Mineral makrotertinggi segar dan kering adalah natrium yaitu 180.092,1 ppm (bk dan 111.209,4 ppm (bk, terkecil adalahkalsium yaitu 5.750,2 ppm (bk dan 11,1 ppm (bk. Mineral mikro tertinggi segar dan kering adalah iodium yaitu8.291,5 ppm (bk dan 1.800 ppm (bk dan yang terkecil adalah tembaga yaitu 1,1 ppm (bk dan 0,6 ppm (bk.Vitamin B12 segar adalah 396,6 μm/100 g (bk dan kering 63,5 μm/100 g (bk.Kata kunci: asam amino, mineral, taurin, ubur-ubur (Aurelia aurita, vitamin B12

  2. ZIRCONIUM-TITANIUM-BERYLLIUM BRAZING ALLOY

    Science.gov (United States)

    Gilliland, R.G.; Patriarca, P.; Slaughter, G.M.; Williams, L.C.

    1962-06-12

    A new and improved ternary alloy is described which is of particular utility in braze-bonding parts made of a refractory metal selected from Group IV, V, and VI of the periodic table and alloys containing said metal as a predominating alloying ingredient. The brazing alloy contains, by weight, 40 to 50 per cent zirconium, 40 to 50 per cent titanium, and the balance beryllium in amounts ranging from 1 to 20 per cent, said alloy having a melting point in the range 950 to 1400 deg C. (AEC)

  3. Crystallization of modified hydroxyapatite on titanium implants

    International Nuclear Information System (INIS)

    Golovanova, O A; Izmailov, R R; Zaits, A V; Ghyngazov, S A

    2016-01-01

    Carbonated-hydroxyapatite (CHA) and Si-hydroxyapatite (Si-HA) precipitation have been synthesized from the model bioliquid solutions (synovial fluid and SBF). It is found that all the samples synthesized from the model solutions are single-phase and represent hydroxyapatite. The crystallization of the modified hydroxyapatite on alloys of different composition, roughness and subjected to different treatment techniques was investigated. Irradiation of the titanium substrates with the deposited biomimetic coating can facilitate further growth of the crystal and regeneration of the surface. (paper)

  4. Laser-TIG Welding of Titanium Alloys

    Science.gov (United States)

    Turichin, G.; Tsibulsky, I.; Somonov, V.; Kuznetsov, M.; Akhmetov, A.

    2016-08-01

    The article presents the results of investigation the technological opportunity of laser-TIG welding of titanium alloys. The experimental stand for implementation of process with the capability to feed a filler wire was made. The research of the nature of transfer the filler wire into the welding pool has been demonstrated. The influence of distance between the electrode and the surface of the welded plates on the stability of the arc was shown. The relationship between welding velocity, the position of focal plane of the laser beam and the stability of penetration of plates was determined.

  5. Diastereoselectivity in scalemic tartrate/titanium epoxidations.

    Science.gov (United States)

    Brown, J M; Leppard, S J; Oakes, J; Thornthwaite, D

    2000-06-01

    Nonlinearity in the diastereoselectivity of epoxidation of allylic alcohols with mixtures of titanium isopropoxide, tertbutyl hydroperoxide, and diethyl tartrate was observed. Racemic and enantiomerically pure alcohols E-2-methyl-4-hexen-3-ol and E-1-methoxy-5-(O-tertbutyldimethylsilyloxy)-2-penten-4-ol were prepared. Epoxidation reactions were carried out with Ti(OPri)4 and ButOOH accompanied by diethyl tartrate of varying enantiomeric purity. The simplest explanation of these results is that a dimeric epoxidation reagent is involved, with significantly different reactivity for the homochiral and racemic forms. Copyright 2000 Wiley-Liss, Inc.

  6. Titanium tungsten coatings for bioelectrochemical applications

    DEFF Research Database (Denmark)

    Wierzbicki, Rafal; Amato, Letizia; Łopacińska, J.

    2011-01-01

    This paper presents an assessment of titanium tungsten (TiW) coatings and their applicability as components of biosensing systems. The focus is put on using TiW as an electromechanical interface layer between carbon nanotube (CNT) forests and silicon nanograss (SiNG) cell scaffolds. Cytotoxicity......, applicability to plasma-enhanced chemical vapor deposition (PECVD) of aligned CNT forests, and electrochemical performance are investigated. Experiments include culturing of NIH3T3 mouse embryonic fibroblast cells on TiW coated silicon scaffolds, CNT growth on TiW substrates with nickel catalyst, and cyclic...

  7. Terminal solid solubility of hydrogen in titanium

    International Nuclear Information System (INIS)

    Giroldi, J.P.; Vizcaino, Pablo; Banchik, Abraham David

    2003-01-01

    A Research and Development program to build a data base is currently under progress to support the local titanium fabrication. In the present work the temperature of the Terminal Solid Solubility on dissolution (TSSd) and precipitation (TSSp) of titanium hydrides in the Ti α-phase were both measured in the same thermal cycle with a Differential Scanning Calorimeter (DSC). The local titanium producer (FAESA) provided ASTM grade 1 pure Ti bars of about 2,5 cm in diameter. Samples weighting between 50 to 200 mg were cut with a diamond disc and the parallelepiped faces were all carefully ground with SiC papers, then picked in a HNO 3 plus HF aqueous solution and finally dried out with ethanol and hot air. Pairs of (TSSd, TSSp) values for α + δ → α and α → α + δ transformation temperatures in titanium were determined with the same calorimetric procedure already used to calculate the TSS values in zirconium. Data were taken from the same sample during the heating up and cooling down cycle of the second calorimeter run made with the same rate of 20 C degrees / minute. The Cathodic Charging technique was used to charge the samples at different hydrogen concentrations between the 'as fabricated' value and the concentration corresponding to the eutectoid temperature. A mixture of glycerin and phosphoric acid in a 2:1 ratio and a current density of 0,05 to 0,1 Amp/cm 2 were applied to different samples during 24 to 96 hours to get a wide range of hydrogen concentrations. A homogenization heat treatment at 400 C degrees for 45 minutes -made at open air in an electric furnace- was applied to each sample to dissolve the massive hydrides at the sample surfaces and diffuse them into the bulk of the sample. The hydrogen concentration of each sample was measured after the final calorimetric run using the Extraction Method in Liquid State under an inert atmosphere using a Leco RH-404 model Hydrogen Determinator. The experimental data follows a linear relationship -with a

  8. Hydrogen in niobium-titanium alloys

    International Nuclear Information System (INIS)

    Silva, J.R.G. da; Cabral, F.A.O.; Florencio, O.

    1985-01-01

    High purity Nb-Ti polycrystalline alloys were doped with hydrogen in equilibrium with the gaseous atmosphere at a pressure of 80 torr. at different temperatures. The partial molar enthalpy and entropy of the hydrogen solution at high dilution, ΔH sup(-) 0 and ΔS sup(-) 0 , were calculated from the equilibrium solubility data. The ΔH sup(-) 0 values are compared with the electron screened proton model of metal-hydrogen solutions. The addition of titanium to niobium has the effect to increase the hydrogen solubility at a given equilibrium temperature. (Author) [pt

  9. Research progress on laser surface modification of titanium alloys

    International Nuclear Information System (INIS)

    Tian, Y.S.; Chen, C.Z.; Li, S.T.; Huo, Q.H.

    2005-01-01

    Recent developments on laser surface modification of titanium and its alloys are reviewed. Due to the intrinsic properties of high coherence and directionality, laser beam can be focus onto metallic surface to perform a broad range of treatments such as remelting, alloying and cladding, which are used to improve the wear and corrosion resistance of titanium alloys. In addition, the fabrication of bioactive films on the surface of titanium alloys to improve their biocompatibility can be performed by the method of laser ablation deposition. The effect of some laser processing parameters on the resulting surface properties of titanium alloys is discussed. The problems to be solved and the prospects in the field of laser modification of titanium and its alloys are elucidated

  10. Corrosion of gold alloys and titanium in artificial saliva

    International Nuclear Information System (INIS)

    Brune, D.; Evje, D.

    1982-01-01

    Two types of gold alloys and one type of pure titanium have been submitted to corrosion in artificial saliva for periods of up to about 2 months. The release of copper, gold and silver from the gold alloys as well as titanium from the titanium matrix was measured with nuclear tracer technique. The physical/chemical state of the corrosion products of gold alloys referring to the ionic state or presence in particulate form has been examined retaining the particulate matter on a glass filter. Copper was observed to be mainly present in the ionic state. Considerable amounts of gold were observed to be retained on the glass filter explained by the presence of gold in particulate form or as a compentent of a dispersed collloidal phase. The estimation of the release of titanium was registered by the tracer nuclide 46 Sc assuming particulate matter to be deteriorated from the titanium surface. (author)

  11. Growth of anatase titanium dioxide nanotubes via anodization

    Directory of Open Access Journals (Sweden)

    Ed Adrian Dilla

    2012-06-01

    Full Text Available In this work, titanium dioxide nanotubes were grown via anodization of sputtered titanium thin films using different anodization parameters in order to formulate a method of producing long anatase titanium dioxide nanotubes intended for solar cell applications. The morphological features of the nanotubes grown via anodization were explored using a Philips XL30 Field Emission Scanning Electron Microscope. Furthermore, the grown nanotubes were also subjected to X-ray diffraction and Raman spectroscopy in order to investigate the effect of the predominant crystal orientation of the parent titanium thin film on the crystal phase of the nanotubes. After optimizing the anodization parameters, nanotubes with anatase TiO2 crystal phase and tube length more than 2 microns was produced from parent titanium thin films with predominant Ti(010 crystal orientation and using ammonium fluoride in ethylene glycol as an electrolyte with a working voltage equal to 60V during 1-hour anodization runs.

  12. Introduction to powder metallurgy processes for titanium manufacturing

    International Nuclear Information System (INIS)

    Esteban, P. G.; Bolzoni, L.; Ruiz-Navas, E. M.; Gordo, E.

    2011-01-01

    The development of new extraction processes to produce titanium in powder form leads Powder Metallurgy to an advantage position among the manufacturing processes for titanium. The cost reduction of base material, coupled with the economy of the powder metallurgy processes, give titanium industry the chance to diversify its products, which could lead to production volumes able to stabilise the price of the metal. This work reviews some of the Powder Metallurgy techniques for the manufacturing of titanium parts, and describes the two typical approaches for titanium manufacturing: Blending Elemental and Prealloyed Powders. Among others, conventional pressing and sintering are described, which are compared with cold and hot isostatic pressing techniques. Real and potential applications are described. (Author) 71 refs.

  13. Kemampuan Penalaran Dan Komunikasi Matematis : Apa, Mengapa, Dan Bagaimana Ditingkatkan Pada Mahasiswa

    Directory of Open Access Journals (Sweden)

    Cita Dwi Rosita

    2014-01-01

    Full Text Available Matematika diberikan kepada semua siswa tanpa terkecuali agar terlatih berpikir secara logis, analitis, sistematis, dan kreatif. Dengan kompetensi-kompetensi tersebut diharapkan siswa dapat memiliki kemampuan menerima, mengelola, dan memanfaatkan pengetahuan yang diperolehnya untuk bertahan hidup dalam keadaan yang selalu berubah dan kompetitif. Latihan berpikir, merumuskan dan memecahkan masalah serta mengambil kesimpulan akan membantu siswa untuk mengembangkan pemikirannya atau intelegensinya. Dengan demikian, semakin banyak siswa berlatih memecahkan masalah matematis maka akan semakin mengerti dan berkembang cara berpikirnya. Kemahiran siswa dalam memecahkan masalah matematis, dipengaruhi oleh kemampuannya dalam memahami matematika. Kemampuan bernalar berperan penting dalam memahami matematika. Bernalar secara matematis merupakan suatu kebiasaan berpikir, dan layaknya suatu kebiasaan, maka penalaran semestinya menjadi bagian yang konsisten dalam setiap pengalaman-pengalaman matematis siswa. Dari pengalaman-pengalaman awal siswa belajar materi matematika, penting bagi guru untuk membantu siswa memahami bahwa penegasan-penegasan harus selalu mempunyai alasan. Komunikasi matematis berperan penting pada proses pemecahan masalah. Melalui komunikasi ide bisa menjadi objek yang dihasilkan dari sebuah refleksi, penghalusan, diskusi, dan pengembangan. Proses komunikasi juga membantu dalam proses pembangunan makna dan pempublikasian ide. Ketika para siswa ditantang untuk berpikir dan bernalar tentang matematika dan mengomunikasikan hasil pikiran mereka secara lisan atau dalam bentuk tulisan, sebenarnya mereka sedang belajar menjelaskan dan meyakinkan. Mendengarkan penjelasan lain, berarti sedang memberi kesempatan kepada siswa untuk mengembangkan pemahaman mereka.

  14. KEADILAN ORGANISASIONAL DAN KONSEKUENSINYA TERHADAP ORGANIZATIONAL CITIZENSHIP BEHAVIOR GURU SMA DAN SMK KOTA MADIUN*

    Directory of Open Access Journals (Sweden)

    Veronika Agustini Srimulyani

    2017-11-01

    Full Text Available Keadilan organisasional memiliki potensi untuk menciptakan manfaat besar bagi organisasi dan karyawan, dan salah satu manfaatnya adalah menumbuhkan extra-role behavior (ERB atau organizational citizenship behavior (OCB. Tujuan dari penelitian ini untuk menganalisis konsekuensi keadilan organisasional (keadilan distributif, keadilan prosedural, dan keadilan interaksional pada organizational citizenship behavior guru SMA dan guru SMK di Kota Madiun. OCB dibagi menjadi dua jenis yaitu citizenship behaviors directed toward individuals (OCB-I dan citizenship behaviors directed towards the organisation (OCB-O. Penelitian ini menggunakan pendekatan kuantitatif dengan metode survei. Sampel penelitian ini adalah 409 guru, yang dipilih secara non-acak. Data diperoleh dengan menyebarkan kuesioner. Analisis data menggunakan analisis regresi. Hasil penelitian disimpulkan: keadilan distributif dan keadilan interaksional berpengaruh positif signifikan terhadap OCB-I dan OCB-O; keadilan prosedural tidak berpengaruh signifikan terhadap OCB-I tetapi keadilan prosedural berpengaruh positif signifikan terhadap OCB-O.

  15. Perawatan Satu\tKunjungan\tpada\tPremolar Pertama Atas Menggunakan Protaper Rotary dan Restorasi Resin Komposit

    Directory of Open Access Journals (Sweden)

    Sherli Diana

    2013-06-01

    Full Text Available Preparasi kemomekanik pada saluran akar meliputi instrumentasi mekanis dan irigasi antibakteri yang secara prinsip dapat langsung mengeliminasi mikroorganisme pada sistem saluran akar. sejak diperkenalkan pada tahun 1988, instrumen rotary nikel-titanium (niti telah digunakan secara umum dalam perawatan endodontik karena kemampuannya membentuk saluran akar dengan prosedur komplikasi yang minimal. Tujuan dari laporan kasus ini adalah untuk memaparkan perawatan saluran akar satu kunjungan menggunakan protaper rotary dan restorasi resin komposit gigi premolar. Penderita pria 21 tahun datang ke RSGM Prof. Soedomo UGM Yogyakarta mengeluhkan gigi belakang atas kiri yang berlubang tapi tidak sakit dan pasien ingin  dirawat.Gigi  Premolar satu atas  kiri terdapat kavitas disto oklusal dengan pulpa terbuka. Pemeriksan objektif pada gigi 24 sondasi, perkusi, palpasi, dan tes termal menunjukkan hasil negatif.Pemeriksaan radiografis tidak terdapat lesi, lamina dura tidak terputus dan saluran akar jelas dan lurus. Pada kasus ini dilakukan perawatan saluran akar dengan menggunakan ProTaper rotary ( X-Smart, Dentsply. Pasca perawatan saluran akar, gigi premolar satu atas kiri dilakukan tumpatan resin komposit kelas II.Hasil evaluasi klinik saat kontrol tidak ada keluhan rasa sakit, pemeriksaan objektif juga tidak ada rasa sakit, warna gigi serasi dengan warna gigi tetangga.prognosis pada kasus ini baik dan tidak ada keluhan. Kesimpulan paska perawatan saluran akar satu kunjungan dengan instrumenrotary, tidak terdapat keluhan.Penggunaan Instrumen rotary Nikel-Titanium (NiTi sangat flexible dengan prosedur komplikasi yang minimal, dan hemat waktu. One Visit Treatment of Upper Premolar Tooth Using Rotary Protaper and Composite Resin Restoration. Chemomechanical preparation for root canal including mechanic instrumentation and anti-bacterial irrigation principally could eliminate microorganisms in root canal system. Many instruments and techniques have been

  16. ANALISIS TINGKAT KEPUASAN DAN HARAPAN PASEN TERHADAP PELAYANAN PUSKESMAS DAN RUMAH SAKIT DAERAH PROVINSI DIY

    Directory of Open Access Journals (Sweden)

    Sunarto Sunarto

    2010-10-01

    Full Text Available Kepuasan merupakan perasaan seseorang mengenai kesenangan atau kekecewaan sebagai hasil membandingkan antara kinerja dan harapan. Jumlah kunjungan Puskesmas tahun 2007 sebesar 3.094.027 pasien yang terdiri dari 3.076442 rawat jalan dan 17.585 rawat inap. Penelitian untuk mengentahui gambaran tingkat kepuasan dan untuk mengetahui perbedaan tingkat kepuasan dan harapan pasien yang mendapatkan pelayanan Puskemas dan rumah sakit menurut wilayah Kabupatet / Kota di Propinsi DIY Penelitian ini merupakan penelitian deskriptif analitik dengan menggunakan rancangan cros sectional. Instrumen penelitian yang digunakan adalah kuisioner dengan 35 item pernyataan yang diambil dari atribut-atribut SERVQUAL dalam 5 dimensi. Total sampel untuk lima Kabupaten Kota sebanyak 1000, masing-masing Kabupaten Kota 200. Penelitian ini dilakukan terhadap pasien yang menerima pelayanan kesehatan di Puskesmas dan Rumah Sakit Daerah di Kabupaten-Kota Daerah Istimewa Yogyakarta. Penilaian tingkat kepuasan pasien ketika mereka berobat ke Puskesmas dan Rumah Sakit di Propinsi DIY, dengan menggunakan skala O sampai 4. Hasilnya adalah dimensi tangibles, rata-rata kepuasan pasien (2,96 cukup dan harapan pasien (3,38 pada dimensi reliability, rata-rata kepuasan pasien (3,01 bagus dan harapan pasien (3,40. Pada dimensi responsiveness, rata-rata kepuasan pa-sien (3,07 bagus dan harapan pasien (3,42. Dimensi assurance, rata-rata kepuasan pasien (3, 1 0 bagus dan harapan pasien (3 ,42. pada dimensi emphaty, rata-rata kepuasan pasien (3,02 bagus dan harapan pasien (3,35. Hasil uji statistik didapatkan nilai p > 0.05, berarti pada alpha 5%, dapat disimpulkan bahwa tidak terdapat perbedaan tingkat kepuasan diantara kelima wilayah kabupaten/kota di DIY. Penilaian tingkat kepuasan pasien, ketika mereka berkunjung ke Puskesmas dan Rumah Sakit di DIY secara rata-rata bagus dan tidak ada perbedaan tingkat kepuasan menurut wilayah Kabupaten-Kota di Propinsi DIY. Kata Kunci : Kepuasan, harapan

  17. Produksi Panel Dinding Bangunan Tahan Gempa dan Ramah Lingkungan dari Limbah Bahan Berbahaya dan Beracun Industri Minyak dan Gas

    Directory of Open Access Journals (Sweden)

    Luqman Hakim

    2015-10-01

    Full Text Available Berdasarkan hasil uji karakteristik fisik terhadap panel dinding dari komposit limbah industry migas berupa activated alumina, sandblasting dan glasswall yang telah dilakukan pada tahun pertama diketahui bahwa kuat lentur tertinggi diperoleh dari sampel B4 yaitu sebesar 67,8 Kg/Cm2 dengan standar DIN 1101 17 Kg/cm2, kuat desak sampel B 2 68,31 N/mm2 dengan standar bata merah 25 N/mm2 dan batako 20 N/mm2 dan tingkat keausan terendah diperoleh dari sampel 37 streap. Dari hasil tersebut diketahui bahwa uji telah memiliki kemampuan lebih tinggi jika dibandingkan dengan standar yang berlaku. Maka pada penelitian lanjutan yang akan dilakukan bertujuan untuk mempelajari apakah produk panel dinding ini ramah lingkungan sehingga aman bagi kesehatan manusia dan lingkungan sekitarnya.Penelitian dilakukan dengan menggunakan metode uji toxicity characteristic leaching procedure (TCLP dan LC50 terhadap produk panel dinding terbaik. Uji TCLP yang akan dilakukan yaitu dengan cara mendestruksi dan ekstraksi produk panel dinding dengan menggunakan rotating agitator selama 24 jam kemudian diuji dengan menggunakan AAS untuk mengetahui konsentrasi logam berat yang terdapat dalam produl panel dinding. Adapun untuk uji LC50 dilakukan dengan menggunakan hewan uji larva udang atau tikus.Berdasarkan hasil uji TCLP dan LC50 diketahui bahwa: a Kadar kandungan logam berat yang terdapat di dalam wall panel setelah dilakukan uji TCLP ternyata berada dibawah baku mutu seperti yang telah ditetapkan dalam PP No.85 Tahun 1999. Jadi ini artinya produk wall panel dalam penelitian ini ramah lingkungan, b pengujian terhadap bahan baku wall panel, Limbah Activated Alumina, Sandblasting dan Glasswoll sebelum di solidifikasi dapat mematikan sebesar 50% hewan uji pada konsentrasi 116.667 ppm dalam waktu 96 jam, dan c hasil uji LC50 terhadap produk wall panel selama 96 jam tidak menunjukkan adanya kematian hewan uji. Dari hasil penelitian ini dapat disimpulkan bahwa produk wall panel dari

  18. UPAYA MENINGKATKAN HASIL BELAJAR, AKTIVITAS DAN SIKAP PADA MATERI GETARAN, GELOMBANG DAN BUNYI, MELALUI METODE DISKUSI, OBSERVASI, DAN EKSPERIMEN

    Directory of Open Access Journals (Sweden)

    Yuni Lestari Purnomowati

    2016-03-01

    Full Text Available Penelitian dilakukan menggunakan metodePenelitian Tindaan Kelas (PTK. Penelitian ini dilaksanakan di  SMKN 3 Metro pada siswa Kelas XI-TKJa semester genapTahun Pelajaran 2012/2013 berjumlah 31 siswa.Sasaran perubahan dalam penelitian ini yaitu peningkatan hasil, aktivitas dan sikap siswa terhadap pelajaran Fisika. Peneliti dapat menyimpulkan bahwa peningkatan hasil belajargetaran, gelombang dan bunyi terjadi karena kerjasama siswa selama proses pembelajaran menumbuhkan suasana yang nyaman sekaligus kompetitif. Perubahan sikap siswa terhadap pelajaran Fisika semakin baik. Ketika pembelajaran fisika mampu memberikan apa yang diharapkan oleh siswa, yaitu siswa merasa nyaman, tidak terintimidasi oleh guru dan teman karena keterbatasan yang dimilikinya, terlibat dengan teman sejawat pada saat menyelesaikan tugas-tugas yang diberikan dengan diskusi, melakukan observasi, dan bereksperimen, maka persepsi terhadap fisika sebagai objek menjadi berubah lebih baik. Adanya interaksi siswa dengan media pembelajaran karena kegiatan mendiskusikan, mengobservasi, dan melakukan eksperimen mendorong siswa menjadi aktif selama proses pembelajaran. Penelitian dilakukan menggunakan metodePenelitian Tindaan Kelas (PTK. Penelitian ini dilaksanakan di  SMKN 3 Metro pada siswa Kelas XI-TKJa semester genapTahun Pelajaran 2012/2013 berjumlah 31 siswa.Sasaran perubahan dalam penelitian ini yaitu peningkatan hasil, aktivitas dan sikap siswa terhadap pelajaran Fisika. Peneliti dapat menyimpulkan bahwa peningkatan hasil belajargetaran, gelombang dan bunyi terjadi karena kerjasama siswa selama proses pembelajaran menumbuhkan suasana yang nyaman sekaligus kompetitif. Perubahan sikap siswa terhadap pelajaran Fisika semakin baik. Ketika pembelajaran fisika mampu memberikan apa yang diharapkan oleh siswa, yaitu siswa merasa nyaman, tidak terintimidasi oleh guru dan teman karena keterbatasan yang dimilikinya, terlibat dengan teman sejawat pada saat menyelesaikan tugas-tugas yang

  19. Osseointegration is improved by coating titanium implants with a nanostructured thin film with titanium carbide and titanium oxides clustered around graphitic carbon

    Energy Technology Data Exchange (ETDEWEB)

    Veronesi, Francesca [Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopedic Institute, Via Di Barbiano 1/10, Bologna 40136 (Italy); Giavaresi, Gianluca; Fini, Milena [Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopedic Institute, Via Di Barbiano 1/10, Bologna 40136 (Italy); Laboratory of Biocompatibility, Innovative Technologies and Advanced Therapies, Department Rizzoli RIT, Via Di Barbiano 1/10, Bologna 40136 (Italy); Longo, Giovanni [CNR Istituto di Struttura della Materia, CNR, Via del Fosso del Cavaliere 100, 00133 Roma (Italy); Ioannidu, Caterina Alexandra; Scotto d' Abusco, Anna [Dept. of Biochemical Sciences, Sapienza University of Roma, Ple A. Moro 5, 00185 Roma (Italy); Superti, Fabiana; Panzini, Gianluca [Dept. of Technologies and Health, Istituto Superiore di Sanità, Viale Regina Elena, 299 Roma (Italy); Misiano, Carlo [Romana Film Sottili, Anzio, Roma (Italy); Palattella, Alberto [Dept. of Clinical Sciences and Translational Medicine, Tor Vergata University, Via Montpellier 1, 00133 Roma (Italy); Selleri, Paolo; Di Girolamo, Nicola [Exotic Animals Clinic, Via S. Giovannini 53, 00137 Roma (Italy); Garbarino, Viola [Dept. of Radiology, S.M. Goretti Hospital, Via G. Reni 2, 04100 Latina (Italy); Politi, Laura [Dept. of Biochemical Sciences, Sapienza University of Roma, Ple A. Moro 5, 00185 Roma (Italy); Scandurra, Roberto, E-mail: roberto.scandurra@uniroma1.it [Dept. of Biochemical Sciences, Sapienza University of Roma, Ple A. Moro 5, 00185 Roma (Italy)

    2017-01-01

    Titanium implants coated with a 500 nm nanostructured layer, deposited by the Ion Plating Plasma Assisted (IPPA) technology, composed of 60% graphitic carbon, 25% titanium oxides and 15% titanium carbide were implanted into rabbit femurs whilst into the controlateral femurs uncoated titanium implants were inserted as control. At four time points the animals were injected with calcein green, xylenol orange, oxytetracycline and alizarin. After 2, 4 and 8 weeks femurs were removed and processed for histology and static and dynamic histomorphometry for undecalcified bone processing into methylmethacrylate, sectioned, thinned, polished and stained with Toluidine blue and Fast green. The overall bone-implant contacts rate (percentage of bone-implant contacts/weeks) of the TiC coated implant was 1.6 fold than that of the uncoated titanium implant. The histomorphometric analyses confirmed the histological evaluations. More precisely, higher Mineral Apposition Rate (MAR, μm/day) (p < 0.005) and Bone Formation Rate (BFR, μm{sup 2}/μm/day) (p < 0.0005) as well as Bone Implant Contact (Bic) and Bone Ingrowth values (p < 0.0005) were observed for the TiC coated implants compared to uncoated implants. In conclusion the hard nanostructured TiC layer protects the bulk titanium implant against the harsh conditions of biological tissues and in the same time, stimulating adhesion, proliferation and activity of osteoblasts, induces a better bone-implant contacts of the implant compared to the uncoated titanium implant. - Highlights: • Ti implants were coated with a nanostructured film composed of C{sub gr}, TiC and TiO{sub x}. • The TiC layer stimulates adhesion, proliferation and activity of osteoblasts. • Uncoated and TiC coated titanium implants were implanted in rabbit femurs. • Bone-implant contacts of TiC coated implants were higher than that of uncoated. • Mineral Apposition Rate of TiC coated implants were higher than that of uncoated.

  20. Osseointegration is improved by coating titanium implants with a nanostructured thin film with titanium carbide and titanium oxides clustered around graphitic carbon

    International Nuclear Information System (INIS)

    Veronesi, Francesca; Giavaresi, Gianluca; Fini, Milena; Longo, Giovanni; Ioannidu, Caterina Alexandra; Scotto d'Abusco, Anna; Superti, Fabiana; Panzini, Gianluca; Misiano, Carlo; Palattella, Alberto; Selleri, Paolo; Di Girolamo, Nicola; Garbarino, Viola; Politi, Laura; Scandurra, Roberto

    2017-01-01

    Titanium implants coated with a 500 nm nanostructured layer, deposited by the Ion Plating Plasma Assisted (IPPA) technology, composed of 60% graphitic carbon, 25% titanium oxides and 15% titanium carbide were implanted into rabbit femurs whilst into the controlateral femurs uncoated titanium implants were inserted as control. At four time points the animals were injected with calcein green, xylenol orange, oxytetracycline and alizarin. After 2, 4 and 8 weeks femurs were removed and processed for histology and static and dynamic histomorphometry for undecalcified bone processing into methylmethacrylate, sectioned, thinned, polished and stained with Toluidine blue and Fast green. The overall bone-implant contacts rate (percentage of bone-implant contacts/weeks) of the TiC coated implant was 1.6 fold than that of the uncoated titanium implant. The histomorphometric analyses confirmed the histological evaluations. More precisely, higher Mineral Apposition Rate (MAR, μm/day) (p < 0.005) and Bone Formation Rate (BFR, μm 2 /μm/day) (p < 0.0005) as well as Bone Implant Contact (Bic) and Bone Ingrowth values (p < 0.0005) were observed for the TiC coated implants compared to uncoated implants. In conclusion the hard nanostructured TiC layer protects the bulk titanium implant against the harsh conditions of biological tissues and in the same time, stimulating adhesion, proliferation and activity of osteoblasts, induces a better bone-implant contacts of the implant compared to the uncoated titanium implant. - Highlights: • Ti implants were coated with a nanostructured film composed of C gr , TiC and TiO x . • The TiC layer stimulates adhesion, proliferation and activity of osteoblasts. • Uncoated and TiC coated titanium implants were implanted in rabbit femurs. • Bone-implant contacts of TiC coated implants were higher than that of uncoated. • Mineral Apposition Rate of TiC coated implants were higher than that of uncoated.

  1. Dhenggung Asmarandana dan Dhegung Banten: Sebuah Komparasi

    Directory of Open Access Journals (Sweden)

    Teguh -

    2013-11-01

    Full Text Available The Comparation of Dhenggung Asmarandana and Dhegung Banten. Penelitian ini membahas perbandinganantara gending Dhenggung Asmaradana gaya Surakarta dengan gending Dhegung Banten gaya Yogyakarta.Berdasarkan penelitian dapat disimpulkan bahwa kedua gending memiliki persamaan dan perbedaan. Persamaankeduanya terletak pada laras, pathet, bentuk gendhing, struktur gendhing, serta balungan gending. Sedangkanperbedaannya hanya pada nama dan garap tabuhan bonang.

  2. PERTUMBUHAN EKONOMI DAN KEBUTUHAN PANGAN DI INDONESIA

    Directory of Open Access Journals (Sweden)

    S. Rusdiana

    2017-04-01

    Full Text Available Pertumbuhan ekonomi berpengaruh terhadap kebutuhan pangan, sesuai dengan pertambahan jumah penduduk. Kebutuhan pangan di Indonesia hampir dapat dipenuhi semua, dari potensi domestik, kecuali untuk komoditas pangan asal daging impor dan kedelai yang masih mengalami defisit, sedangkan untuk beras, jagung, kacang maupun ubi, telor, daging ayam, dan susu mengalami surplus yang tinggi. Tujuan tulisan ini untuk mengetahui petumbuhan ekonomi dan kebutuhan pangan di Indonesia, sehingga dapat diatasi dengan penyediaan pangan asal pertanian dan peternakan sesuai kebutuhan. Pemerintah dapat mempertahankan dan berupaya terus memacu pembangunan ketahanan pangan, melalui program yang benar-benar mampu memperkokoh untuk ketahanan pangan, sekaligus dapat meningkatkan kesejahteraan masyarakat. Kebijakan pembangunan nasional dalam rangka mewujudkan kedaulatan pangan yang diarahkan pada peningkatan produksi pangan asal daging sapi dan tanamanm pangan beras. Tingkat pendapatan rumah tangga dapat mencerminkanmenjadi salah satu ukuran kemampuan dalam mengakses konsumsi pangan yang dibutuhkan beserta keragamannya.Pertumbuhan komoditi pangan yang paling tinggi setiap tahun adalah komoditi beras, sedangkan kontribusi daging sapi dalam memenuhi kebutuhan protein hewani menduduki urutan yang kedua setelah daging unggas. Dalam pencapaian swasembada pangan perlu difokuskan pada terwujudnya ketahanan pangan dan pengembangan teknologi pangan, diharapkan mampu memfasilitasi program pasca panen dan pengolahan hasil pertanian, secara efektif, serta mendukung kebijakan pemerintah, lebih memperhatikan masalah ketahanan pangan yang ada di Indonesia.

  3. (Crustacés, Amphipodes) dans la

    African Journals Online (AJOL)

    enseignant1

    Fadil, 2006 (Crustacés, Amphipodes) dans la source Tataw (Moyen Atlas, Maroc) ... sous-espèces ou des formes locales multiples dans toute l'Europe centrale [3 - 10]. .... le pH, et la conductivité électrique ont été réalisées sur le terrain à l'aide ...

  4. Nickel-titanium alloys: a systematic review

    Directory of Open Access Journals (Sweden)

    Marcelo do Amaral Ferreira

    2012-06-01

    Full Text Available OBJECTIVE: A systematic review on nickel-titanium wires was performed. The strategy was focused on Entrez-PubMed-OLDMEDLINE, Scopus and BioMed Central from 1963 to 2008. METHODS: Papers in English and French describing the behavior of these wires and laboratorial methods to identify crystalline transformation were considered. A total of 29 papers were selected. RESULTS: Nickel-titanium wires show exceptional features in terms of elasticity and shape memory effects. However, clinical applications request a deeper knowledge of these properties in order to allow the professional to use them in a rational manner. In addition, the necessary information regarding each alloy often does not correspond to the information given by the manufacturer. Many alloys called "superelastic" do not present this effect; they just behave as less stiff alloys, with a larger springback if compared to the stainless steel wires. CONCLUSIONS: Laboratory tests are the only means to observe the real behavior of these materials, including temperature transition range (TTR and applied tensions. However, it is also possible to determine in which TTR these alloys change the crystalline structure.

  5. Ballistic Limit Equation for Single Wall Titanium

    Science.gov (United States)

    Ratliff, J. M.; Christiansen, Eric L.; Bryant, C.

    2009-01-01

    Hypervelocity impact tests and hydrocode simulations were used to determine the ballistic limit equation (BLE) for perforation of a titanium wall, as a function of wall thickness. Two titanium alloys were considered, and separate BLEs were derived for each. Tested wall thicknesses ranged from 0.5mm to 2.0mm. The single-wall damage equation of Cour-Palais [ref. 1] was used to analyze the Ti wall's shielding effectiveness. It was concluded that the Cour-Palais single-wall equation produced a non-conservative prediction of the ballistic limit for the Ti shield. The inaccurate prediction was not a particularly surprising result; the Cour-Palais single-wall BLE contains shield material properties as parameters, but it was formulated only from tests of different aluminum alloys. Single-wall Ti shield tests were run (thicknesses of 2.0 mm, 1.5 mm, 1.0 mm, and 0.5 mm) on Ti 15-3-3-3 material custom cut from rod stock. Hypervelocity impact (HVI) tests were used to establish the failure threshold empirically, using the additional constraint that the damage scales with impact energy, as was indicated by hydrocode simulations. The criterion for shield failure was defined as no detached spall from the shield back surface during HVI. Based on the test results, which confirmed an approximately energy-dependent shield effectiveness, the Cour-Palais equation was modified.

  6. Atomic absorption analysis of serial titanium alloys

    International Nuclear Information System (INIS)

    Gorlova, M.N.; Feofanova, N.M.; Kornyushkova, Yu.D.

    1977-01-01

    Atom-absorption technique is described, which makes it possible to rapidly and precisely determine the following alloying elements and admixtures in titanium alloys: Al (2.0 - 8.5%); Mo (0.5 - 8%); Cr (0.5 - 12%); Si (0.2 - 0.5%); Mn(0.2 - 2.5%); V(0.5 - 6%); Sn(2.0 - 3.0%); Fe(0.1 - 1.0%); Zr(2.0 - 12.0%). The atom absorption method with flame atomization of the sample provides for best results if the alloy is dissolved in a mixture HCl + HBF 4 in the ratio 2:1. In order to obtain correct results the standard solutions must contain titanium in concentrations corresponding to the weight of the sample being analyzed. Sensitivity of zirconium determination may be increased approximately twofold by adding 10 mg/ml of FeCl 3 into the solution. Being as precise, as the classic analytical methods, the atom absorption technique is about 5 times more efficient

  7. Synthesis of titanium sapphire by ion implantation

    International Nuclear Information System (INIS)

    Morpeth, L.D.; McCallum, J.C.; Nugent, K.W.

    1998-01-01

    Since laser action was first demonstrated in titanium sapphire (Ti:Al 2 O 3 ) in 1982, it has become the most widely used tunable solid state laser source. The development of a titanium sapphire laser in a waveguide geometry would yield an elegant, compact, versatile and highly tunable light source useful for applications in many areas including optical telecommunications. We are investigating whether ion implantation techniques can be utilised to produce suitable crystal quality and waveguide geometry for fabrication of a Ti:Al 2 O 3 waveguide laser. The implantation of Ti and O ions into c-axis oriented α-Al 2 O 3 followed by subsequent thermal annealing under various conditions has been investigated as a means of forming the waveguide and optimising the fraction of Ti ions that have the correct oxidation state required for laser operation. A Raman Microprobe is being used to investigate the photo-luminescence associated with Ti 3+ ion. Initial photoluminescence measurements of ion implanted samples are encouraging and reveal a broad luminescence profile over a range of ∼ .6 to .9 μm, similar to that expected from Ti 3+ . Rutherford Backscattering and Ion Channelling analysis have been used to study the crystal structure of the samples following implantation and annealing. This enables optimisation of the implantation parameters and annealing conditions to minimise defect levels which would otherwise limit the ability of light to propagate in the Ti:Al 2O 3 waveguide. (authors)

  8. Additive Manufacturing of Metastable Beta Titanium Alloys

    Science.gov (United States)

    Yannetta, Christopher J.

    Additive manufacturing processes of many alloys are known to develop texture during the deposition process due to the rapid reheating and the directionality of the dissipation of heat. Titanium alloys and with respect to this study beta titanium alloys are especially susceptible to these effects. This work examines Ti-20wt%V and Ti-12wt%Mo deposited under normal additive manufacturing process parameters to examine the texture of these beta-stabilized alloys. Both microstructures contained columnar prior beta grains 1-2 mm in length beginning at the substrate with no visible equiaxed grains. This microstructure remained constant in the vanadium system throughout the build. The microstructure of the alloy containing molybdenum changed from a columnar to an equiaxed structure as the build height increased. Eighteen additional samples of the Ti-Mo system were created under different processing parameters to identify what role laser power and travel speed have on the microstructure. There appears to be a correlation in alpha lath size and power density. The two binary alloys were again deposited under the same conditions with the addition of 0.5wt% boron to investigate the effects an insoluble interstitial alloying element would have on the microstructure. The size of the prior beta grains in these two alloys were reduced with the addition of boron by approximately 50 (V) and 100 (Mo) times.

  9. Characterizations of additive manufactured porous titanium implants.

    Science.gov (United States)

    Basalah, Ahmad; Shanjani, Yaser; Esmaeili, Shahrzad; Toyserkani, Ehsan

    2012-10-01

    This article describes physical, chemical, and mechanical characterizations of porous titanium implants made by an additive manufacturing method to gain insight into the correlation of process parameters and final physical properties of implants used in orthopedics. For the manufacturing chain, the powder metallurgy technology was combined with the additive manufacturing to fabricate the porous structure from the pure tanium powder. A 3D printing machine was employed in this study to produce porous bar samples. A number of physical parameters such as titanium powder size, polyvinyl alcohol (PVA) amount, sintering temperature and time were investigated to control the mechanical properties and porosity of the structures. The produced samples were characterized through porosity and shrinkage measurements, mechanical compression test and scanning electron microscopy (SEM). The results showed a level of porosity in the samples in the range of 31-43%, which is within the range of the porosity of the cancelluous bone and approaches the range of the porosity of the cortical bone. The results of the mechanical test showed that the compressive strength is in the wide range of 56-509 MPa implying the effect of the process parameters on the mechanical strengths. This technique of manufacturing of Ti porous structures demonstrated a low level of shrinkage with the shrinkage percentage ranging from 1.5 to 5%. Copyright © 2012 Wiley Periodicals, Inc.

  10. Structure of titanium-doped goethite rust

    International Nuclear Information System (INIS)

    Nakayama, Takenori; Ishikawa, Tatsuo; Konno, Toyohiko J.

    2005-01-01

    To investigate the influence of titanium addition on the formation and structure of goethite (α-FeOOH) rust which is one of main corrosion products of weathering steel, the artificially synthesized α-FeOOH rusts were prepared by hydrolysis of aqueous solutions of Fe(III) containing Ti(IV) at different atomic ratios (Ti/Fe) in the range 0-0.1. The obtained rusts particles were observed by TEM. Characterization by XRD, N 2 absorption, Moessbauer spectroscopy was also done. TEM observation revealed that the α-FeOOH rust particle size increased with the increase of Ti/Fe, and that Ti-enriched poorly crystalline particles were formed around the rust particles. XRD confirmed that the crystallite size increased with the increase of Ti/Fe, while the XRD peaks decreased in intensity. Specific surface area obtained by N 2 absorption increased with the increase of Ti/Fe. It is deduced from the obtained results that the addition of Ti(IV) increases the crystallite size of α-FeOOH, and produces double domain particles consisting of the particle core and a porous poorly crystalline shell. It is thought that such unique rust structure produced by titanium addition contributes to the protective properties of rust layer of the weathering steel

  11. Nanomaterial Case Studies: Nanoscale Titanium Dioxide in ...

    Science.gov (United States)

    EPA announced the availability of the final report, Nanomaterial Case Studies: Nanoscale Titanium Dioxide in Water Treatment and in Topical Sunscreen. This report is a starting point to determine what is known and what needs to be known about selected nanomaterials as part of a process to identify and prioritize research to inform future assessments of the potential ecological and health implications of these materials. Two specific applications of nanoscale titanium dioxide (nano-TiO2) are considered: (1) as an agent for removing arsenic from drinking water; and (2) as an active ingredient in topical sunscreen. These case studies are organized around a comprehensive environmental assessment (CEA) framework that combines a product life cycle perspective with the risk assessment paradigm. They are intended to help identify what may need to be known in order to conduct a comprehensive environmental assessment of the potential risks related to nano-TiO2. These “case studies” do not represent completed or even preliminary assessments, nor are they intended to serve as a basis for risk management decisions in the near term on these specific uses of nano TiO2. Rather, the intent is to use this document in developing the scientific and technical information needed for future assessment efforts.

  12. Molecular and physiological responses to titanium dioxide ...

    Science.gov (United States)

    - Changes in tissue transcriptomes and productivity of Arabidopsis thaliana were investigated during exposure of plants to two widely-used engineered metal oxide nanoparticles, titanium dioxide (nano-titanium) and cerium dioxide (nano-cerium). Microarray analyses confirmed that exposure to either nanoparticle altered the transcriptomes of rosette leaves and roots, with comparatively larger numbers of differentially expressed genes (DEGs) found under nano-titania exposure. Nano-titania induced more DEGs in rosette leaves, whereas roots had more DEGs under nano-ceria exposure. MapMan analyses indicated that while nano-titania up-regulated overall and secondary metabolism in both tissues, metabolic processes under nano-ceria remained mostly unchanged. Gene enrichment analysis indicated that both nanoparticles mainly enriched ontology groups such as responses to stress (abiotic and biotic), and defense responses (pathogens), and responses to endogenous stimuli (hormones). Nano-titania specifically induced genes associated with photosynthesis, whereas nano-ceria induced expression of genes related to activating transcription factors, most notably those belonging to the ethylene responsive element binding protein family. Interestingly, there were also increased numbers of rosette leaves and plant biomass under nano-ceria exposure, but not under nano-titania. Other transcriptomic responses did not clearly relate to responses observed at the organism level. This may b

  13. Enhancement of catalyst performance in the direct propene epoxidation: a study into gold-titanium synergy

    NARCIS (Netherlands)

    Chen, J.; Halin, S.J.A.; Pidko, E.A.; Verhoeven, M.W.G.M.; Perez Ferrandez, D.M.; Hensen, E.J.M.; Schouten, J.C.; Nijhuis, T.A.

    2013-01-01

    Enhanced productivity toward propene oxide in the direct propene epoxidation with hydrogen and oxygen over gold nanoparticles supported on titanium-grafted silica was achieved by adjusting the gold–titanium synergy. Highly isolated titanium sites were obtained by lowering the titanium loading

  14. Penerapan Sistem Remunerasi dan Kinerja Pelayanan

    Directory of Open Access Journals (Sweden)

    Tri Wisesa Soetisna

    2015-08-01

    Full Text Available Remunerasi dapat memengaruhi motivasi pegawai sekaligus meningkatkan kinerjanya. Demikian halnya di rumah sakit sebagai institusi pelayanan kesehatan yang padat modal, sumber daya manusia serta padat ilmu dan teknologi. Penelitian ini bertujuan untuk menganalisis persepsi pegawai terhadap implementasi sistem remunerasi dan kinerja unit pelayanan bedah jantung dewasa (UPBJD di rumah sakit. Penelitian ini menggunakan pendekatan mixed methods (kuantitatif dan kualitatif. Desain penelitian kuantitatif adalah potong lintang menggunakan instrumen kuesioner self-assessment. Sedangkan desain penelitian kualitatif adalah deskriptif, dilakukan melalui focus group discussion dan telaah dokumen pada data berupa buku jadwal, buku registrasi, catatan keperawatan, dan rekam medis. Pengambilan data dilakukan pada tahun 2013 di salah satu rumah sakit di Jakarta. Responden/informan adalah staf medis fungsional, perawat, dan petugas administrasi berjumlah 29 orang. Data dianalisis secara univariat (metode kuantitatif, dan content analysis (metode kualitatif. Hasil penelitian menunjukkan bahwa sebagian besar staf medis fungsional dan perawat tidak puas (71,2% dengan beberapa hal dalam penerapan sistem remunerasi, seperti pada sistem penggajian dan penentuan grading. Terlihat kinerja unit pelayanan bedah jantung dewasa mengalami kenaikan setiap tahun sebelum dan setelah penerapan sistem remunerasi. Diharapkan agar rumah sakit ini dapat memperbaiki sistem remunerasi yang sesuai ketentuan kebijakan dan menyusun formulasi insentif dan bonus yang lebih sesuai dengan kondisi saat ini serta perlu dilakukan sosialisasi yang tepat dan evaluasi secara berkala. Implementation of Remuneration System and Service Performance Remuneration can influence worker`s motivation, and improve their performance. Likewise in hospital as capital-intensive, human resources-intensive as well as knowledge and technology-intensive health care institution. This study aimed to analyze employee

  15. HUBUNGAN NONMONOTONIK ANTARA KONTROL DAN KINERJA PERUSAHAAN

    Directory of Open Access Journals (Sweden)

    Gede Juliarsa

    2012-07-01

    Full Text Available ABSTRAK Dalam rerangka agency theory, manajemen perusahaan merupakan agent yang harus bertanggung jawab kepada pemegang saham sebagai principal. Agent diberikan tanggung jawab untuk mengelola aset principal untuk dapat dikelola secara ekonomis. Studi ini bertujuan untuk mengetahui hubungan antara kinerja perusahaan dengan kepemilikan manajemen dan ukuran perusahaan. Studi ini menguji 46 kinerja perusahaan tahun 2001 terhadap perusahaan go public yang terdaftar di Bursa Efek Jakarta.  Data diperoleh dari Indonesian Capital Market Directory 2002. Pengujian hubungan antara kinerja perusahaan menggunakan Economic Value Added, kepemilikan manajemen, dan ukuran perusahaan dilakukan dengan analisis regresi berganda dan korelasi. Hasil pengujian menunjukkan bahwa hubungan antara kinerja perusahaan, ukuran perusahaan, dan kepemilikan manajemen adalah tidak monotonik, tetapi secara signifikan curvilinear. Temuan ini sesuai dengan penelitian yang dilakukan oleh Fogelberg dan Griffth (2000.   Kata kunci: economic value added, kepemilikan manajemen, kinerja,ukuran perusahaan, teori agensi

  16. Seminar dan Wokshop Jurnalistik Anak SMA “Yournalism”

    OpenAIRE

    T.R, Amal Gamasi; Nugroho, Adi; Setyabudi, Djoko

    2013-01-01

    PENDAHULUANMasyarakat Indonesia saat ini merupakan masyarakat informasi yangmenghabiskan sebagian besar waktunya dengan media komunikasi dan menggunakanteknologi informasi seperti ponsel dan komputer maupun laptop. Mereka akan mudahmelakukan pertukaran data informasi karena saat ini,mengingat konvergensi mediatidak hanya mengubah basis data dan medium yang menyalurkannya, tetapi jugasecara keseluruhan mengubah proses produksi, pengolahan, dan distribusi informasisehingga media-media seperti k...

  17. Experimental Technique of Titanium Fire in Aero-engine

    Directory of Open Access Journals (Sweden)

    MI Guangbao

    2016-06-01

    Full Text Available Titanium fire is the typical catastrophic fault in the aero-engine. Aiming at the urgent demand for experimental technique of titanium fire from advanced high thrust-weight ratio aero-engine, the combustion technology and theory of titanium alloy based on friction oxygen concentration method (FOC were systematically studied. The evaluation method of fireproof property and the friction ignition model were built, and the fireproof mechanism was illustrated. By generalizing recent progress in experimental technique of titanium fire from three levels, including evolutionary rule, mechanism and prevention and control technology, the ideas and directions of experimental technique associated with the application research of titanium fire in the future were proposed, namely overall evaluation of fireproof property close to air flow environment of the aero-engine, prediction model of fireproof property and experimental verification of fireproof technique under the air flow environment of aero-engine. It is necessary to establish the prevention system of titanium fire in aero-engine, which contributes to the realization of "full titanium" in compressor and to the increase of high thrust-weight ratio.

  18. Hydrogen embrittlement of titanium tested with fracture mechanics specimens

    International Nuclear Information System (INIS)

    Aho-Mantila, I.; Rahko, P.

    1990-11-01

    Titanium is one of the possible canister materials for spent nuclear fuel. The aim of this study is to determine whether the hydrogen embrittlement of titanium could be a possible deterioration mechanism of titanium canisters. This experimental study was preceded by a literature review and an experimental study on crack nucleation. Tests in this study were carried out with hydrogen charged fracture mechanics specimens. The studied hydrogen contents were as received, 100 ppm, 200 ppm, 500 ppm and 700 ppm and the types of the studied titanium were ASTM Grades 2 and 12. Test methods were slow tensile test (0.027 mm/h) and fatigue test (stress ratio 0.7 or 0.8 and frequency 5 Hz). According to the literature titanium may be embrittled by hydrogen at slow strain rates and cracking may occur under sustained load. In this study no evidence of hydrogen embrittlement was noticed in slow strain rate tension with bulk hydrogen contents up to 700 ppm. The fatigue tests of titanium Grades 2 and 12 containing 700 ppm hydrogen showed even slower crack growth compared to the as received condition. Very high hydrogen contents well in eccess of 700 ppm on the surface of titanium can, however, facilitate surface crack nucleation and crack growth, as shown in the previous study

  19. All welded titanium condenser adopted in atomic power plants

    International Nuclear Information System (INIS)

    Iwai, Nagao; Itabashi, Yukihiko

    1980-01-01

    Condensers in power plants are shell-and-tube type heat exchangers. Most condensers use seawater as a coolant. Their tube and tube Sheets have usually been made of brass, which resists corrosion but cannot completely prevent it; as a result, tubes sometimes corrode or erode, allowing seawater to leak into the turbine cycle. As is well known, titanium has almost complete corrosion resistance against seawater; for this reason titanium tubes have replaced brass ones in some condensers operating in Europe and the USA. Even in such condensers, though, the tube plates have still been made of brass, tightly fitted to the titanium tubes, and it has proved impossible to eliminate seawater leakage at the junctions between tubes and tube Sheets. In order to eliminate such leakage completely, the tube Sheets must be made of titanium too, and the tubes and plates must be welded together. However, the welding of titanium requires an extremely celan atmosphere, a condition very difficult to fulfill at power plant construction sites, and the use of whole welded titanium tube condensers has long been considered a practical impossibility. Such all-titanium welded condensers have now been successfully constructed and installed in two 600 MW fossil power plants and one 1100 MW nuclear power plant. This paper describes the techniques used, add in addition reviews the various materials that have been used in condenser tubes. (author)

  20. Laser shock peening of titanium 6-4 alloy

    International Nuclear Information System (INIS)

    Brar, N.S.; Hopkins, A.; Laber, M.W.

    2000-01-01

    Laser shock peening of titanium 6-4 has been shown to improve its high cycle fatigue life. Residual compressive stresses generated on the surface of titanium 6-4, as a result of laser shocking, have shown dramatic improvement in the performance of aircraft turbine blades. Laser shocking of titanium was carried out with a 20 ns pulse width, 50 joule pulsed laser, operated by LSP Technologies, Columbus, OH. Titanium disks, 20-mm in diameter, and ranging in thicknesses from zero (bare LiF) to 3-mm were subjected to laser shock to monitor amplitude and temporal stress profiles of the pulsed laser. Laser shock stress amplitudes on the back of titanium disks were monitored with VISAR using LiF as the window material. The peak shock stress produced in LiF (titanium thickness zero) was measured to be 16±1 GPa. The laser shock amplitude decays to about 2.7 GPa while propagating through 3-mm thick disk of titanium 6-4

  1. Effect of cathodic polarization on coating doxycycline on titanium surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Geißler, Sebastian; Tiainen, Hanna; Haugen, Håvard J., E-mail: h.j.haugen@odont.uio.no

    2016-06-01

    Cathodic polarization has been reported to enhance the ability of titanium based implant materials to interact with biomolecules by forming titanium hydride at the outermost surface layer. Although this hydride layer has recently been suggested to allow the immobilization of the broad spectrum antibiotic doxycycline on titanium surfaces, the involvement of hydride in binding the biomolecule onto titanium remains poorly understood. To gain better understanding of the influence this immobilization process has on titanium surfaces, mirror-polished commercially pure titanium surfaces were cathodically polarized in the presence of doxycycline and the modified surfaces were thoroughly characterized using atomic force microscopy, electron microscopy, secondary ion mass spectrometry, and angle-resolved X-ray spectroscopy. We demonstrated that no hydride was created during the polarization process. Doxycycline was found to be attached to an oxide layer that was modified during the electrochemical process. A bacterial assay using bioluminescent Staphylococcus epidermidis Xen43 showed the ability of the coating to reduce bacterial colonization and planktonic bacterial growth. - Highlights: • Titanium hydride was found not to be involved in immobilization of doxycycline. • Doxycycline coating was strongly bound to a modified surface oxide layer. • Effect of coatings tested using a dynamic bacteria assay based on bioluminescence. • Topmost layer of adsorbed doxycycline was shown to have strong antibacterial effect.

  2. TUGAS DAN WEWENANG PUSAT PELAPORAN DAN ANALISIS TRANSAKSI KEUANGAN (PPATK DALAM PEMBERANTASAN TINDAK PIDANA PENCUCIAN UANG

    Directory of Open Access Journals (Sweden)

    Johari Johari

    2014-03-01

    Full Text Available Tugas dan wewenang Pusat Pelaporan dan Analisis Transaksi Keuangan (PPATK terdapat di dalam Pasal 26 dan Pasal 27 Undang-Undang No. 25 Tahun 2003 tentang Tindak Pencucian Uang. Berdasarkan ketentuan tersebut, tugas dan wewenang PPATK tersebut bertujuan untuk mendeteksi terjadinya tindak pidana pencucian uang, dan membantu penegakan hukum yang berkaitan dengan pencucian uang, termasuk tindak pidana asal yang melahirkannya (predicate offences. Namun, Peranan PPATK akan berjalan secara efektif apabila aparat penegak hukum seperti Kepolisian, Kejaksaan, Pengadilan, Bea dan Cukai, para regulator seperti Bank Indonesia, Departemen Keuangan, Badan Pengawas Pasar Modal serta Penyedia Jasa Keuangan, industri perbankan, asuransi, perusahaan pembiayaan, dana pensiun, perusahaan efek, pengelola reksadana, media massa, masyarakat bekerjasama secara terorganisir dan terpadu dalam pemberantasan tindak pencucian uang di Indonesia. Dengan kewenangan yang dimilikinya, PPATK dapat mengejar hasil dari kejahatan, apabila hasil kejahatan tersebut dapat dikejar dan disita maka negara dengan sendirinya akan mengurangi tindak kejahatan itu sendiri. Kata kunci : Pencucian uang, tindak pidana pencucian uang (money laundering, kejahatan terorganisir, dan Pusat Pelaporan dan Analisis Transaksi Keuangan (PPATK.

  3. PENGARUH VARIETAS DAN SISTEM BUDIDAYA TERHADAP PERTUMBUHAN, PRODUKSI, DAN KANDUNGAN GIZI JAGUNG (ZEA MAYS L.

    Directory of Open Access Journals (Sweden)

    Yukarie Ayu Wulandari

    2016-06-01

    Full Text Available Jagung merupakan bahan pangan yang berpotensi untuk dikembangkan sebagai pangan lokal, pakan, dan bahan baku industri. Mengingat pentingnya jagung, maka perlu adanya upaya untuk peningkatan produktivitasnya. Penelitian bertujuan untuk mengetahui pengaruh varietas dan sistem budidaya terhadap pertumbuhan, produksi, dan kandungan gizi jagung. Penelitian menggunakan Rancangan Petak Terbagi dengan petak utama varietas (Srikandi Putih-1 dan Srikandi Kuning-1 dan anak petak sistem budidaya (organik dan inorganik yang diulang lima kali. Hasil menunjukkan bahwa varietas Srikandi Putih-1 memberikan hasil tertinggi pada tinggi tanaman, jumlah daun, luas daun, lingkar batang, pati, dan vitamin A. Varietas Srikandi Kuning-1 memberikan hasil tertinggi pada produksi, protein dan lemak. Sistem budidaya inorganik memberikan hasil tertinggi pada tinggi tanaman, jumlah daun, panjang tongkol, bobot bersih tongkol, bobot pipilan kering, bobot 100 butir, konversihasil/ha, patidan protein. Interaksi varietas Srikandi Putih-1 dengan sistem budidaya organik memberikan hasil tertinggi terhadap jumlah daun, lingkar batang dan kandungan vitamin A. Varietas Srikandi Kuning-1 yang dibudidayakan secara inorganik memberikan hasil tertinggi terhadap bobot bersih tongkol, bobot pipilan kering, bobot 100 butir, konversi hasil ha-1 dan kandungan protein. Kandungan pati tertinggi pada varietas Srikandi Putih-1 yang dibudidayakan secara inorganik, sedangkan kandungan lemak tertinggi pada varietas Srikandi Kuning-1 yang dibudidayakan secara organik.

  4. Peran Mitra Strategis dan Agen Perubahan dalam Manajemen Talenta dan Kinerja Manajer

    Directory of Open Access Journals (Sweden)

    Ida Ketut Kusumawijaya

    2014-06-01

    Full Text Available Abstract  The purposes of the study are to analyze: (1 characteristic of strategic partner and change agent roles, talent management and managers performance, (2 influence of strategic partner and change agent roles to talent management and its impact to managers performance. Four hundred hotel managers in Bali were participated in this study by using proportional random sampling. Data were analyzed using descriptive analysis and SEM. The result shows that: (1 strategic partner and change agent role, talent management and managers performance are in enough category, (2 positive and significant effect between strategic partner and change agent roles to talent management and its impact to managers performance. Keywords:Strategic Partner Role, Change Agent Role, Talent Management, Managers Performance.AbstrakTujuan penelitian ini adalah untuk menganalisis: (1 karakteristik dari mitra strategis dan peran agen perubahan, manajemen bakat dan kinerja manajer, (2 pengaruh mitra strategis dan peran agen perubahan untuk manajemen bakat dan dampaknya terhadap kinerja manajer. Sebanyak empat ratus manajer hotel di Bali berpartisipasi dalam penelitian ini dengan menggunakan proporsional random sampling. Data dianalisis menggunakan analisis deskriptif dan SEM. Hasil penelitian menunjukkan bahwa: (1 mitra strategis dan peran agen perubahan, manajemen bakat dan kinerja manajer termasuk dalam kategori cukup, (2 pengaruh positif dan signifikan antara mitra strategis dan peran agen perubahan untuk manajemen bakat dan dampaknya terhadap kinerja manajer.Keywords: Peran Mitra Strategis, Peran Agen Perubahan, Manajemen Talenta, kinerja Manajer.

  5. Surface Functionalization of Orthopedic Titanium Implants with Bone Sialoprotein.

    Directory of Open Access Journals (Sweden)

    Andreas Baranowski

    Full Text Available Orthopedic implant failure due to aseptic loosening and mechanical instability remains a major problem in total joint replacement. Improving osseointegration at the bone-implant interface may reduce micromotion and loosening. Bone sialoprotein (BSP has been shown to enhance bone formation when coated onto titanium femoral implants and in rat calvarial defect models. However, the most appropriate method of BSP coating, the necessary level of BSP coating, and the effect of BSP coating on cell behavior remain largely unknown. In this study, BSP was covalently coupled to titanium surfaces via an aminosilane linker (APTES, and its properties were compared to BSP applied to titanium via physisorption and untreated titanium. Cell functions were examined using primary human osteoblasts (hOBs and L929 mouse fibroblasts. Gene expression of specific bone turnover markers at the RNA level was detected at different intervals. Cell adhesion to titanium surfaces treated with BSP via physisorption was not significantly different from that of untreated titanium at any time point, whereas BSP application via covalent coupling caused reduced cell adhesion during the first few hours in culture. Cell migration was increased on titanium disks that were treated with higher concentrations of BSP solution, independent of the coating method. During the early phases of hOB proliferation, a suppressive effect of BSP was observed independent of its concentration, particularly when BSP was applied to the titanium surface via physisorption. Although alkaline phosphatase activity was reduced in the BSP-coated titanium groups after 4 days in culture, increased calcium deposition was observed after 21 days. In particular, the gene expression level of RUNX2 was upregulated by BSP. The increase in calcium deposition and the stimulation of cell differentiation induced by BSP highlight its potential as a surface modifier that could enhance the osseointegration of orthopedic implants

  6. PENGARUH CARA PENGAWETAN TERHADAP KOMPOSISI KIMIA DAN EFISIENSI DALAM BENTUK HAY DAN SILASE PADA DAUN 16 PROVENAN GAMAL (GLIRICIDIA SEPIUM

    Directory of Open Access Journals (Sweden)

    A. W. Puger

    2012-09-01

    Full Text Available RINGKASAN Percobaan yang bertujuan untuk mengetahui pengaruh cara pengawetan terhadap kandungan zat-zat makanan dan efisiensinya pada daun 16 provenan gamal telah dilaksanakan selama 3 bulan. Penelitian menggunakan rancangan acak lengkap yang terdiri atas 3 perlakuan pengawetan (gamal segar, gamal hay, dan gamal silase dan 3 blok sebagai ulangan. Setiap perlakuan terdiri atas 16 provenan, yaitu 6 dari Mexico (M, 4 dari Guatemala (G, dan satu provenan masing-masing dari Colombia (C, Indonesia (I, Nicaragua (N, Panama (P, Costa Rica (R, dan Venezuela (V. Sampel setiap daun (helai dan tangkai provenan sebelum dan setelah diawetkan dianalisis kandungan zat-zat makanannya dan dihitung efisiensinya setelah dibuat hay dan silase. Kandungan DM dan CP dari hay adalah tertinggi (P0,05 setelah diawetkan menjadi hay dan silase, sedangkan efisiensi DM, OM, dan CP dari hay lebih tinggi (P<0,05 daripada silase. Provenan P13, R12, dan M34 mengandung zat-zat makanan lebih tinggi; sementara provenan G14 dan G17 lebih efisien bila diawetkan dalam bentuk hay dan silase. Pada pertanian lahan kering pengawetan gamal dalam bentuk hay lebih efektif dan efisien jika dibandingkan dengan dalam bentuk silase.

  7. Laser beam welding of titanium nitride coated titanium using pulse-shaping

    Directory of Open Access Journals (Sweden)

    Milton Sergio Fernandes de Lima

    2005-09-01

    Full Text Available A new welding method which allows the assembly of two titanium nitride coated titanium parts is proposed. The welding procedure utilizes the possibility for pulse-shaping in order to change the energy distribution profile during the laser pulse. The pulse-shaping is composed of three elements: a a short high power pulse for partial ablation at the surface; b a long pulse for thermal penetration; and c a quenching slope for enhanced weldability. The combination of these three elements produces crack-free welds. The weld microstructure is changed in comparison to normal welding, i.e. with a rectangular pulse, as the nitrogen and the microhardness are more homogenously distributed in the weld under pulse-shaping conditions. This laser pulse dissolves the TiN layer and allows nitrogen to diffuse into the melt pool, also contributing to an enhanced weldability by providing suitable thermal conditions.

  8. Inhibitor effect on corrosion of titanium alloys in muriatic solutions of titanium-magnesium production

    International Nuclear Information System (INIS)

    Dobrunov, Yu.V.; Volynskij, V.V.; Kolobov, G.A.; Kuznetsov, S.I.

    1977-01-01

    Corrosion tests of titanium alloys VTI-0, OT4, VT5-1 and steel Kh18N1OT in 10% and 18% HCl with additions of carnallite at 40 deg C have been carried out. It has been established that titanium alloys in 10% and 18% HCl containing 5 and 10% carnallite are sufficiently corrosion resistant in the presence of 0.1-1% FeCl or HNO 3 and can be used for manufacturing the equipment of recirculation gas scrubbers. Steel Kh18N10T is unstable in all the media tested. It is subjected to intensive pitting. Specimens of steel Kh18N10T have also revealed edge cracking

  9. Narrow titanium oxide nanowires induced by femtosecond laser pulses on a titanium surface

    Energy Technology Data Exchange (ETDEWEB)

    Li, Hui; Li, Xian-Feng [Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006 (China); Zhang, Cheng-Yun [School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006 (China); Tie, Shao-Long [School of Chemistry and Environment, South China Normal University, Guangzhou 510006 (China); Lan, Sheng, E-mail: slan@scnu.edu.cn [Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006 (China)

    2017-02-28

    Highlights: • Titanium oxide nanowires with a feature width as narrow as ∼20 nm were induced on a titanium surface by using femtosecond laser pulses at 400 nm. • An evolution of the surface structure from a high spatial frequency laser-induced periodic structure parallel to the laser polarization to a low spatial frequency one perpendicular to the laser polarization was observed with increasing irradiation pulse number. • The formation of the titanium oxide nanowires was confirmed by the energy dispersive spectroscopy measurements and the evolution of the surface structure was successfully interpreted by using the efficacy factor theory. - Abstract: The evolution of the nanostructure induced on a titanium (Ti) surface with increasing irradiation pulse number by using a 400-nm femtosecond laser was examined by using scanning electron microscopy. High spatial frequency periodic structures of TiO{sub 2} parallel to the laser polarization were initially observed because of the laser-induced oxidation of the Ti surface and the larger efficacy factor of TiO{sub 2} in this direction. Periodically aligned TiO{sub 2} nanowires with featured width as small as 20 nm were obtained. With increasing pulse number, however, low spatial frequency periodic structures of Ti perpendicular to the laser polarization became dominant because Ti possesses a larger efficacy factor in this direction. The competition between the high- and low-spatial frequency periodic structures is in good agreement with the prediction of the efficacy factor theory and it should also be observed in the femtosecond laser ablation of other metals which are easily oxidized in air.

  10. Profil Gangguan Kognitif pada Tumor Intrakranial Primer dan Metastasis

    OpenAIRE

    Kartika Maharani; Andira Larasari; Tiara Aninditha; Yetty Ramli

    2015-01-01

    Gangguan kognitif sering menyertai pasien tumor intrakranial dan menjadi penyebab utama disabilitas. Perbedaan patofisiologi tumor intrakranial primer (TIP) dan metastasis (TM) menyebabkan perbedaan gambaran klinis dan derajat  gangguan kognitif. Tujuan penelitian ini untuk mengetahui prevalensi dan profil gangguan kognitif pasien TIP dan TM. Disain penelitian potong-lintang retrospektif menggunakan data sekunder dari Poliklinik Saraf RSCM pada bulan Januari 2011-Desember 2013. Subjek b...

  11. Isolasi, Karakterisasi dan Potensi Bakteri Aerob sebagai Pendegradasi Limbah Organik

    OpenAIRE

    Zahidah, Dinda; Shovitri, Maya

    2013-01-01

    Penelitian ini dilakukan untuk mengisolasi dan mengkarakterisasi bakteri aerob yang mampu mendegradasi amilum, protein dan selulosa. Penelitian ini berhasil memurnikan dan mengkarakterisasi isolat bakteri C5 yang cenderung masuk ke genus Bacillus. Berdasarkan uji kualitatif amilolitik, selulolitik dan proteolitik, diketahui bahwa isolat C5 memiliki indeks amilolitik (IA) sebesar 0.93, indeks selulolitik (IS) sebesar 1.95 dan indeks proteolitik (IP) sebesar 1.39

  12. Nonmetal effect on ordering structures in titanium carbide

    International Nuclear Information System (INIS)

    Tashmetov, M.Yu.; Ehm, V.T.; Savenko, B.M.

    1997-01-01

    The effect of oxygen and nitrogen atoms on formation of intermediate, cubic and trigonal ordering structures in the titanium carbide is studied through the roentgenography and neutron radiography methods. Metal atoms in the TiC 0.545 O 0.08 , TiC 0.545 N 0.09 samples under study are shifted from ideal positions in the direction from vacancies to metalloid atoms. In the intermediate cubic phase the values of the titanium atoms free parameter in both samples are identical, but they differ from analogous values in the titanium carbide

  13. Colloidal Plasmonic Titanium Nitride Nanoparticles: Properties and Applications

    Directory of Open Access Journals (Sweden)

    Guler Urcan

    2015-01-01

    Full Text Available Optical properties of colloidal plasmonic titanium nitride nanoparticles are examined with an eye on their photothermal and photocatalytic applications via transmission electron microscopy and optical transmittance measurements. Single crystal titanium nitride cubic nanoparticles with an average size of 50 nm, which was found to be the optimum size for cellular uptake with gold nanoparticles [1], exhibit plasmon resonance in the biological transparency window and demonstrate a high absorption efficiency. A self-passivating native oxide at the surface of the nanoparticles provides an additional degree of freedom for surface functionalization. The titanium oxide shell surrounding the plasmonic core can create new opportunities for photocatalytic applications.

  14. Models for the adsorption of uranium on titanium dioxide

    International Nuclear Information System (INIS)

    Jaffrezic-Renault, N.; Poirier-Andrade, H.; Trang, D.H.

    1980-01-01

    A hydrated titanium oxide whose acid-base properties are well defined has been used to study the retention mechanism of uranium as UO 2 2+ (in acidic media) and as UO 2 (CO 3 ) 3 4- (in carbonate media). The influence of various parameters on the distribution coefficient of uranium (pH, [CO 3 2- ]) and of the adsorption of uranium on the electrophoretic mobilities of the titanium oxide have been investigated. It is shown that, in both media, coordinative TiO-UO 2 bonds are formed. These strong bonds explain the high affinity of the titanium oxide for uranium. (orig.)

  15. The use of titanium and stainless steel in fracture fixation.

    Science.gov (United States)

    Hayes, J S; Richards, R G

    2010-11-01

    The use of metal in fracture fixation has demonstrated unrivalled success for many years owing to its high stiffness, strength, biological toleration and overall reliable function. The most prominent materials used are electropolished stainless steel and commercially pure titanium, along with the more recent emergence of titanium alloys. Despite the many differences between electropolished stainless steel and titanium, both materials provide a relatively predictable clinical outcome, and offer similar success for fulfilling the main biomechanical and biological requirements of fracture fixation despite distinctive differences in implant properties and biological responses. This article explores these differences by highlighting the limitations and advantages of both materials, and addresses how this translates to clinical success.

  16. Water leaching of titanium from ore flotation residue.

    Science.gov (United States)

    Jaworska, Malgorzata M; Guibal, Eric

    2003-01-01

    Copper ore tailings were tested for the stability of titanium submitted to water leaching in three different reactor systems (agitated vessel, bioreactor and percolated fixed-bed column). For each of these systems, titanium extraction did not exceed 1% of the available metal. Biomass removed from ore residue adsorbed a small part of the titanium with sorption capacities below 20-30 mg g(-1), but most of this biomass was sequestered in the ore residue. Oxygen and carbon dioxide concentrations were monitored and changes in concentration correlated with bacteria development at the initial stage of the process and to fungal development in the latter stages.

  17. Vanadium and titanium determination by resorcinalhydrazide of salicylic acid

    Energy Technology Data Exchange (ETDEWEB)

    Karpova, O I; Pilipenko, A T; Lukachina, V V [AN Ukrainskoj SSR, Kiev. Inst. Kolloidnoj Khimii i Khimii Vody

    1979-02-01

    The complexing of titanium and vanadium with resorcinalhydrazyl of salicylic acid (RHSA) in water-organic media is studied. Titanium (4) forms a complex at pH 0.8-1.8, vanadium - at pH 2.5-5.6, and at pH 7.6-9.8. The complexes are well extracted by polar and nonpolar solvents from acid solutions. The techniques are developed for the determination of titanium and vanadium by the RHSA agent in nickel alloys.

  18. Characterization and Sintering of Armstrong Process Titanium Powder

    Science.gov (United States)

    Xu, Xiaoyan; Nash, Philip; Mangabhai, Damien

    2017-04-01

    Titanium and titanium alloys have a high strength to weight ratio and good corrosion resistance but also need longer time and have a higher cost on machining. Powder metallurgy offers a viable approach to produce near net-shape complex components with little or no machining. The Armstrong titanium powders are produced by direct reduction of TiCl4 vapor with liquid sodium, a process which has a relatively low cost. This paper presents a systematic research on powder characterization, mechanical properties, and sintering behavior and of Armstrong process powder metallurgy, and also discusses the sodium issue, and the advantages and disadvantages of Armstrong process powders.

  19. Interaction of titanium and vanadium with carbon dioxide under heating

    International Nuclear Information System (INIS)

    Vlasyuk, R.Z.; Kurovskij, V.Ya.; Lyapunov, V.P.; Radomysel'skij, I.D.

    1986-01-01

    The methods of gravitmetric and X-ray phase analysis as well as analysis of composition of gases in the heating chamber have been used to investigate the mechanism of titanium and vanadium interaction with carbon dioxide in the 300-1000 deg C temperature range. The analogy of mechanisms of the interaction of titanium and vanadium with carbon dioxide in oxides production on the metal surface with subsequent carbidizing treatment at temperatures above 800 deg C is shown. Temperature limits of material operation on the base of titanium or vanadium in carbon dioxide must not exceed 400 or 600 deg C, respectively

  20. Molecular geometries and relative stabilities of titanium oxide and gold-titanium oxide clusters

    Energy Technology Data Exchange (ETDEWEB)

    Hudson, Rohan J.; Falcinella, Alexander; Metha, Gregory F., E-mail: greg.metha@adelaide.edu.au

    2016-09-30

    Titanium oxide and gold-titanium oxide clusters of stoichiometry M{sub x}O{sub y} (M{sub x} = Ti{sub 3}, Ti{sub 4} & AuTi{sub 3}; y = 0 − (2x + 2)) have been investigated using density functional theory. Geometries of determined global energy minimum structures are reported and other isomers predicted up to 0.5 eV higher in energy. The Ti{sub 3}O{sub n} geometries build upon a triangular Ti{sub 3} motif, while Ti{sub 4}O{sub n} stoichiometries template upon a pseudo-tetrahedral Ti{sub 4} structure. Addition of a gold atom to the Ti{sub 3}O{sub n} series does not significantly alter the cluster geometry, with the gold atom preferentially binding to titanium atoms over oxygen atoms. Adiabatic ionization energies, electron affinities and HOMO/LUMO energies increase in magnitude with increasing oxygenation. The HOMO-LUMO energy gaps reach the bulk anatase band gap energy at stoichiometry (Au)Ti{sub m}O{sub 2m−1}, and increase above this upon further oxygen addition. The most stable structural moieties are found to be a cage-like, C{sub 3v} symmetric Ti{sub 4}O{sub 6/7} geometry and a Ti{sub 3}O{sub 6} structure with an η{sup 3}-bound oxygen atom.

  1. Formation and characterization of titanium nitride and titanium carbide films prepared by reactive sputtering

    International Nuclear Information System (INIS)

    Sundgren, J.-E.

    1982-01-01

    Titanium has been reactively r.f. sputtered in mixed Ar-N 2 and Ar-CH 4 discharges on to substrates held at 775 K. The films obtained have been characterized by scanning electron microscopy, X-ray diffraction and by measurements of hardness and electrical resistivity. The compositions of the films have been determined using Auger electron spectroscopy. The processes occurring both on substrates and target surfaces have been studied and it is shown that the latter is of great importance for the composition and structure of deposited films. Titanium nitride films of full density and with electrical resistivity and hardness values close to those of bulk TiN were only obtained in a narrow range close to the stoichiometric composition. Titanium carbide films grown on non-biased substrates were found to have an open structure and thus a low density. A bias applied to the substrate, however, improved the quality of the films. It is also shown that the heat of formation of the compounds plays an important role in the formation of carbides and nitrides. A large value promotes the development of large grains and dense structures. (Auth.)

  2. Characterization for rbs of Titanium Oxide thin films grown by Dip Coating in a coloidal suspension of nano structured Titanium Oxide

    International Nuclear Information System (INIS)

    Pedrero, E.; Vigil, E.; Zumeta, I.

    1999-01-01

    The depth of Titanium Oxide thin films grown by Dip Coating in a coloidal suspension of nano structured Titanium Oxide was characterized using Rutherford Backscattering Spectrometry. Film depths are compared in function of bath and suspension parameters

  3. RESPON DAN KOPING PASIEN DM POST AMPUTASI

    Directory of Open Access Journals (Sweden)

    Candra Kusuma Negara

    2017-09-01

    Full Text Available Penyakit DM merupakan masalah kesehatan yang sangat penting karena berkaitan dengan tingginya kejadian komplikasi dan mortalitas yang tinggi. Bagi kebanyakan orang penyakit DM adalah suatu penyakit yang sangat mengkhawatirkan dan masyarakat sadar akan besarnya potensi bahaya yang ditimbulkannya. Bagi individu yang menderita DM dengan pasca amputasi, kehidupan selanjutnya merupakan babak baru yang penuh tantangan dan perubahan serta akan melalui proses koping terhadap proses perubahan tersebut. Secara umum penelitian ini bertujuan untuk mengeksplorasi berbagai pengalaman pasien DM pasca amputasi tentang respon dan koping yang dialaminya. Penelitian ini menggunakan studi fenomenologi. Pengambilan data menggunakan indepth interview pada empat orang partisipan yang dirawat jalan di Poli kaki diabetic RSUD Ulin Banjarmasin yang dilengkapi dengan pedoman wawancara dan informed consent. Metode analisis yang terstruktur dari Creswell menjadi 6 langkah. Terdapat 2 Tema yang ditemukan dalam penelitian ini yaitu berbagai respon post amputasi dan Berbagai koping pasien DM post amputasi. Berbagai respon post amputasi terdiri dari tiga Sub-Tema yaitu: (1 Mengalami hambatan fisik, (2 Mengalami perubahan peran, (3 Mengalami proses berduka, dan Terdapat empat Sub-Tema yang menggambarkan berbagai koping pasien DM post amputasi yaitu: (1 Lebih banyak beribadah, (2 Menerima keadaan, (3 Motivasi yang kuat, (4 Mencari dukungan sosial.

  4. Stress corrosion cracking of Inconel in high temperature water; Corrosion fissurante sous contrainte de l'Inconel dans l'eau a haute temperature

    Energy Technology Data Exchange (ETDEWEB)

    Coriou,; Grall,; Gall, Le; Vettier, [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1960-07-01

    Some Inconel samples were subjected to hot water corrosion testing (350 deg. C), under stress slightly above the elastic limit. It has been observed that different types of alloys - with or without titanium - could suffer serious intergranular damage, including a complete rupture, within a three months period. In one case, we observed an unusual intergranular phenomenon which appeared quite different from common intergranular corrosion. (author) [French] Des essais de corrosion d'Inconel sont realises dans l'eau a 350 deg. C, et sous contrainte legerement superieure a la limite elastique. On constate que differentes varietes d'alliage avec ou sans titane donnent lieu a des accidents intergranulaires graves allant jusqu'a rupture complete en 3 mois. Dans un cas, on observe un phenomene intergranulaire particulier tres different de la corrosion intergranulaire classique. (auteur)

  5. Storage characteristics of hydrogen by titanium

    International Nuclear Information System (INIS)

    Lee, S. H.; Kang, H. S.; Back, S. W.; Choi, H. J.; Kim, K. R.; An, D. H.; Lee, H. S.; Jung, H. S.

    2000-01-01

    Hydrogen absorption experiments were performed by the sponge, strip and rod types of titanium(Ti) for investigating the absorption characteristics of hydrogen. From experimental results, Ti sponge showed the high hydrogen absorption capacity inspite of low reaction temperature(25 .deg. C), the H/M, which mean the capacity of hydrogen absorption was measured 2.0 for Ti sponge at 25 .deg. C. However, in case of strip and rod type of Ti, the hydrogen absorption capacities were very low in the experimental condition of 25 .deg. C. The pulverizing phenomena after metal hydriding reaction was observed in both Ti strip and Ti rod. However, the pulverizing phenomena was not observed in the Ti sponges because of high surface area

  6. Cesium titanium silicate and method of making

    Science.gov (United States)

    Balmer, Mari L.

    1997-01-01

    The invention is the new material, a ternary compound of cesium, silica, and titania, together with a method of making the ternary compound, cesium titanium silicate pollucite. More specifically, the invention is Cs.sub.2 Ti.sub.2 Si.sub.4 O.sub.13 pollucite which is a new crystalline phase representing a novel class of Ti-containing zeolites. Compositions contain relatively high Cs.sub.2 O and TiO.sub.2 loadings and are durable glass and ceramic materials. The amount of TiO.sub.2 and Cs.sub.2 that can be incorporated into these glasses and crystalline ceramics far exceeds the limits set for the borosilicate high level waste glass.

  7. Production of titanium carbide from ilmenite

    Directory of Open Access Journals (Sweden)

    Sutham Niyomwas

    2008-03-01

    Full Text Available The production of titanium carbide (TiC powders from ilmenite ore (FeTiO3 powder by means of carbothermal reduction synthesis coupled with hydrochloric acid (HCl leaching process was investigated. A mixture of FeTiO3 and carbon powders was reacted at 1500oC for 1 hr under flowing argon gas. Subsequently, synthesized product of Fe-TiC powders were leached by 10% HCl solutions for 24 hrs to get final product of TiC powders. The powders were characterized using X-ray diffraction, scanning electron and transmission electron microscopy. The product particles were agglomerated in the stage after the leaching process, and the size of this agglomerate was 12.8 μm with a crystallite size of 28.8 nm..

  8. Shape memory effect for titanium nickelide semiproducts

    International Nuclear Information System (INIS)

    Chernov, D.B.; Fatkullina, L.P.; Smirnova, Z.I.; Timonin, G.D.; Olejnikova, S.V.

    1978-01-01

    The thermomechanical properties of titanium nickelide semi-finished products obtained by garnissage melting followed by arc remelting have been studied for the purpose of investigating the NiTi ''form memory'' mechanism. The ingots were subjected to stepped pressing to produce rods. Calcined rods were tension tested. Investigation of the elastic and thermomechanical free return after deformation has shown that the share of elastic return increases as the preliminary deformation degree is increased. The return to the original form began at about 150 deg C; at 200 deg C the process rate decreases and at 300 deg C it stops. The degree of form recovery decreases with the increase of preliminary deformation. The return stress versus preliminary deformation degree relationship has a maximum at 11% strain degree. Maximum thermomechanical return stresses are observed at about 300 deg C. It is noted that yield strength decreases with the increasing degree of deformation to which the semi-finished products are subjected

  9. Cleaning graphene with a titanium sacrificial layer

    International Nuclear Information System (INIS)

    Joiner, C. A.; Roy, T.; Hesabi, Z. R.; Vogel, E. M.; Chakrabarti, B.

    2014-01-01

    Graphene is a promising material for future electronic applications and chemical vapor deposition of graphene on copper is a promising method for synthesizing graphene on the wafer scale. The processing of such graphene films into electronic devices introduces a variety of contaminants which can be difficult to remove. An approach to cleaning residues from the graphene channel is presented in which a thin layer of titanium is deposited via thermal e-beam evaporation and immediately removed. This procedure does not damage the graphene as evidenced by Raman spectroscopy, greatly enhances the electrical performance of the fabricated graphene field effect transistors, and completely removes the chemical residues from the surface of the graphene channel as evidenced by x-ray photoelectron spectroscopy.

  10. Hydrous titanium oxide-supported catalysts

    International Nuclear Information System (INIS)

    Dosch, R.G.; Stohl, F.V.; Richardson, J.T.

    1990-01-01

    Catalysts were prepared on hydrous titanium oxide (HTO) supports by ion exchange of an active metal for Na + ions incorporated in the HTO support during preparation by reaction with the parent Ti alkoxide. Strong active metal-HTO interactions as a result of the ion exchange reaction can require significantly different conditions for activation as compared to catalysts prepared by more widely used incipient wetness methods. The latter catalysts typically involve conversion or while the HTO catalysts require the alteration of electrostatic bonds between the metal and support with subsequent alteration of the support itself. In this paper, the authors discuss the activation, via sulfidation or reduction, of catalysts consisting of Co, Mo, or Ni-Mo dispersed on HTO supports by ion exchange. Correlations between the activation process and the hydrogenation, hydrodeoxygenation, and hydrodesulfurization activities of the catalysts are presented

  11. Surface modification of titanium by plasma nitriding

    Directory of Open Access Journals (Sweden)

    Kapczinski Myriam Pereira

    2003-01-01

    Full Text Available A systematic investigation was undertaken on commercially pure titanium submitted to plasma nitriding. Thirteen different sets of operational parameters (nitriding time, sample temperature and plasma atmosphere were used. Surface analyses were performed using X-ray diffraction, nuclear reaction and scanning electron microscopy. Wear tests were done with stainless steel Gracey scaler, sonic apparatus and pin-on-disc machine. The obtained results indicate that the tribological performance can be improved for samples treated with the following conditions: nitriding time of 3 h; plasma atmosphere consisting of 80%N2+20%H2 or 20%N2+80%H2; sample temperature during nitriding of 600 or 800 degreesC.

  12. Ordering effects in nonstoichiometric titanium carbide

    International Nuclear Information System (INIS)

    Lipatnikov, V.N.; Zueva, L.V.; Gusev, A.I.; Kottar, A.

    2000-01-01

    The effect of nonstoichiometry and ordering on crystalline structure and specific electric resistance (ρ) of TiC y (0.52≤y≤0.98) is studied within the temperature range of 300-1100 K. It is shown that the titanium carbide ordering in the areas 0.52≤y≤0.55, 0.56≤y≤0.58 and 0.62≤y≤0.68 leads to formation of the Ti 2 C cubic and trigonal ordered phase and the Ti 3 C 2 rhombic ordered phase correspondingly. Availability of hysteresis on the ρ(T) dependences in the area of the disorder-order reversible equilibrium transition points out to the fact that the TiC y ↔Ti 2 C and TiC y ↔Ti 3 C 2 transformations are the first order phase transitions [ru

  13. Machinability of cast commercial titanium alloys.

    Science.gov (United States)

    Watanabe, I; Kiyosue, S; Ohkubo, C; Aoki, T; Okabe, T

    2002-01-01

    This study investigated the machinability of cast orthopedic titanium (metastable beta) alloys for possible application to dentistry and compared the results with those of cast CP Ti, Ti-6Al-4V, and Ti-6Al-7Nb, which are currently used in dentistry. Machinability was determined as the amount of metal removed with the use of an electric handpiece and a SiC abrasive wheel turning at four different rotational wheel speeds. The ratios of the amount of metal removed and the wheel volume loss (machining ratio) were also evaluated. Based on these two criteria, the two alpha + beta alloys tested generally exhibited better results for most of the wheel speeds compared to all the other metals tested. The machinability of the three beta alloys employed was similar or worse, depending on the speed of the wheel, compared to CP Ti. Copyright 2002 Wiley Periodicals, Inc.

  14. Swelling in neutron-irradiated titanium alloys

    International Nuclear Information System (INIS)

    Peterson, D.T.

    1982-04-01

    Immersion density measurements have been performed on a series of titanium alloys irradiated in EBR-II to a fluence of 5 x 10 22 n/cm 2 (E > 0.1 MeV) at 450 and 550 0 C. The materials irradiated were the near-alpha alloys Ti-6242S and Ti-5621S, the alpha-beta alloy Ti-64, and the beta alloy Ti-38644. Swelling was observed in all alloys with the greater swelling being observed at 550 0 C. Microstructural examination revealed the presence of voids in all alloys. Ti-38644 was found to be the most radiation resistant. Ti-6242S and Ti-5621S also displayed good radiation resistance, whereas considerable swelling and precipitation were observed in Ti-64 at 550 0 C

  15. Microstructural characterization of silicon added titanium aluminide

    International Nuclear Information System (INIS)

    Khan, A.N.

    2009-01-01

    Titanium aluminides intermetallic compounds have received great attention during the past decade, since they have the potential, in aircraft and automotive engines, to replace the high density Ni-base superalloys However, these intermetallics possess poor oxidation properties at high temperatures. Previous studies showed that protective alumina scale formation on gamma-TiAl can be obtained by small additions (around 2 at.%) of Ag. In the present study, a number of cast Ti-Al-Si alloys were investigated in relation to transient oxide formation in air at 1300 deg. C. After various oxidation times the oxide composition, microstructure and morphology were studied by combining a number of analysis techniques. The TiAl-Si alloys appear to form Al Ti and Si oxides. However, the formation of silicon oxide at the interface of base metal and scale slows down the oxidation rate significantly. (author)

  16. Preparation and integration of nanostructured titanium dioxide

    KAUST Repository

    Zeng, Hua Chun

    2011-10-01

    Titanium dioxide (TiO2) is a chemically stable nontoxic transition-metal oxide associated with a wide range of existing chemical engineering processes. In this short review, recent research endeavors in preparation and integration of nanostructured TiO2 materials system will be featured and discussed for their potential new applications. Because material development always plays pivotal roles in the progress of a particular engineering discipline, the reviewed subjects will provide useful information to stimulate nanoscale research of chemical engineering, linking established fundamentals with practical applications. Some critical issues and challenges regarding further development of this important functional material for nanotechnology will also be addressed. © 2011 Elsevier Ltd. All rights reserved.

  17. Pengaruh Lama Perendaman dan Jenis Minuman Beralkohol Bir dan Tuak terhadap Kekerasan Email Gigi Manusia (In Vitro)

    OpenAIRE

    Magista, Malida; Nuryanti, Archadian; Wahyudi, Ivan Arie

    2014-01-01

    Erosi gigi merupakan hilangnya lapisan email gigi karena asam. Jenis asam, pH rendah, serta kandungan kalsium, fosfat, dan fluoride pada bir dan tuak diduga merupakan faktor kimiawi penyebab erosi gigi. Tujuan penelitian ini untuk mengetahui pengaruh lama perendaman dan jenis minuman beralkohol bir dan tuak terhadap kekerasan email gigi manusia (in vitro). Penelitian ini menggunakan 14 sampel gigi premolar pertama atas. Setiap gigi dibagi menjadi 2 bagian, bukal dan palatal. kemudian dibagi m...

  18. Pengaruh Lama Perendaman Dan Jenis Minuman Beralkohol Bir Dan Tuak Terhadap Kekerasan Email Gigi Manusia (in Vitro)

    OpenAIRE

    Magista, Malida; Nuryanti, Archadian; Wahyudi, Ivan Arie

    2014-01-01

    Erosi gigi merupakan hilangnya lapisan email gigi karena asam. Jenis asam, pH rendah, serta kandungan kalsium, fosfat, dan fluoride pada bir dan tuak diduga merupakan faktor kimiawi penyebab erosi gigi. Tujuan penelitian ini untuk mengetahui pengaruh lama perendaman dan jenis minuman beralkohol bir dan tuak terhadap kekerasan email gigi manusia (in vitro). Penelitian ini menggunakan 14 sampel gigi premolar pertama atas. Setiap gigi dibagi menjadi 2 bagian, bukal dan palatal. kemudian dibagi m...

  19. 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...

  20. Epistaksis dan Hipertensi : Adakah Hubungannya?

    Directory of Open Access Journals (Sweden)

    Bestari J. Budiman

    2012-09-01

    Full Text Available Abstrak Latar Belakang: Epistaksis merupakan suatu kondisi klinis yang sering ditemui dan dapat terjadi pada semua umur dengan banyak variasi penyebabnya. Salah satu faktor risiko yang diduga ikut berperan dalam terjadinya epistaksis adalah hipertensi. Tujuan: Menjelaskan hubungan antara epistaksis dengan hipertensi. Tinjauan Pustaka: Hipertensi diduga tidak menyebabkan epistaksis secara langsung, tapi memperberat episode epistaksis. Mengendalikan tekanan darah sebagai salah satu faktor risiko, akan menurunkan insiden terjadinya epistaksis. Di ruang gawat darurat, pemberian obat anti hipertensi diberikan sebelum atau bersamaan dengan manajemen epistaksis itu sendiri. Kesimpulan: Terdapat hubungan antara epistaksis dengan hipertensi yang berlangsung lama dan adanya hipertrofi ventrikel kiri. Kata kunci : Hipertensi, kegawatdaruratan, penatalaksanaan epistaksis. Abstract Background: Epistaxis is a common clinical problem in all age groups with varied etiological factors. Hypertension has been suggested as a risk factor in epistaxis case. Purpose: To explain relationship between epistaxis and hypertension. Review: It has been suggested that hypertension does not cause epistaxis directly, but hypertension prolongs the episode of epistaxis when it does occur. The controlling for blood pressure as a risk factor will be decreased the incidencies of epistaxis. In emergency rooms, high blood pressure is usually treated before or in parallel with the management of epistaxis. Conclusion: There was an association between epistaxis and long duration of hypertension in adult and left ventricle hypertrophy. Key words : Hypertension, emergency case, management of epistaxis.

  1. Bacterial adherence to anodized titanium alloy

    International Nuclear Information System (INIS)

    Peremarch, C Perez-Jorge; Tanoira, R Perez; Arenas, M A; Matykina, E; Conde, A; De Damborenea, J J; Gomez Barrena, E; Esteban, J

    2010-01-01

    The aim of this study was to evaluate Staphylococcus sp adhesion to modified surfaces of anodized titanium alloy (Ti-6Al-4V). Surface modification involved generation of fluoride-containing titanium oxide nanotube films. Specimens of Ti-6Al-4V alloy 6-4 ELI-grade 23- meets the requirements of ASTM F136 2002A (AMS 2631B class A1) were anodized in a mixture of sulphuric/hydrofluoric acid at 20 V for 5 and 60 min to form a 100 nm-thick porous film of 20 nm pore diameter and 230 nm-thick nanotube films of 100 nm in diameter. The amount of fluorine in the oxide films was of 6% and of 4%, respectively. Collection strains and six clinical strains each of Staphylococcus aureus and Staphylococcus epidermidis were studied. The adherence study was performed using a previously published protocol by Kinnari et al. The experiments were performed in triplicates. As a result, lower adherence was detected for collection strains in modified materials than in unmodified controls. Differences between clinical strains were detected for both species (p<0.0001, Kruskal-Wallis test), although global data showed similar results to that of collection strains (p<0.0001, Kruskal-Wallis test). Adherence of bacteria to modified surfaces was decreased for both species. The results also reflect a difference in the adherence between S. aureus and S. epidermidis to the modified material. As a conclusion, not only we were able to confirm the decrease of adherence in the modified surface, but also the need to test multiple clinical strains to obtain more realistic microbiological results due to intraspecies differences.

  2. Plasma electrolytic oxidation of Titanium Aluminides

    International Nuclear Information System (INIS)

    Morgenstern, R; Sieber, M; Lampke, T; Grund, T; Wielage, B

    2016-01-01

    Due to their outstanding specific mechanical and high-temperature properties, titanium aluminides exhibit a high potential for lightweight components exposed to high temperatures. However, their application is limited through their low wear resistance and the increasing high-temperature oxidation starting from about 750 °C. By the use of oxide ceramic coatings, these constraints can be set aside and the possible applications of titanium aluminides can be extended. The plasma electrolytic oxidation (PEO) represents a process for the generation of oxide ceramic conversion coatings with high thickness. The current work aims at the clarification of different electrolyte components’ influences on the oxide layer evolution on alloy TNM-B1 (Ti43.5Al4Nb1Mo0.1B) and the creation of compact and wear resistant coatings. Model experiments were applied using a ramp-wise increase of the anodic potential in order to show the influence of electrolyte components on the discharge initiation and the early stage of the oxide layer growth. The production of PEO layers with technically relevant thicknesses close to 100 μm was conducted in alkaline electrolytes with varying amounts of Na 2 SiO 3 ·5H 2 O and K 4 P 2 O 7 under symmetrically pulsed current conditions. Coating properties were evaluated with regard to morphology, chemical composition, hardness and wear resistance. The addition of phosphates and silicates leads to an increasing substrate passivation and the growth of compact oxide layers with higher thicknesses. Optimal electrolyte compositions for maximum coating hardness and thickness were identified by statistical analysis. Under these conditions, a homogeneous inner layer with low porosity can be achieved. The frictional wear behavior of the compact coating layer is superior to a hard anodized layer on aluminum. (paper)

  3. Electrochemical capacitance performance of titanium nitride nanoarray

    Energy Technology Data Exchange (ETDEWEB)

    Xie, Yibing, E-mail: ybxie@seu.edu.cn [School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189 (China); Suzhou Research Institute of Southeast University, Suzhou 215123 (China); Wang, Yong [School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189 (China); Du, Hongxiu [School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189 (China); Suzhou Research Institute of Southeast University, Suzhou 215123 (China)

    2013-12-01

    Highlights: • TiN nanoarray is formed by a nitridation process of TiO{sub 2} in ammonia atmosphere. • TiN nanoarray exhibits much higher EDLC capacitance than TiO{sub 2} nanoarray. • The specific capacitance of TiN nanoarray achieves a high level of 99.7 mF cm{sup −2}. • A flexible solid-state supercapacitor is constructed by TiN nanoarray and PVA gel. -- Abstract: In this study, titanium nitride (TiN) nanoarrays with a short nanotube and long nanopore structure have been prepared by an anodization process of ultra thin titanium foil in ethylene glycol (EG) solution containing ammonium fluoride, subsequent calcination process in an air atmosphere, and final nitridation process in an ammonia atmosphere. The morphology and microstructure characterization has been conducted using field emission scanning electron microscope and X-ray diffraction. The electrochemical properties have been investigated through cyclic voltammetry and electrochemical impedance spectrum measurements. The electrochemical capacitance performance has been investigated by galvanostatic charge–discharge measurements in the acidic, neural and alkali electrolyte solution. Well-defined TiN nanoarrays contribute a much higher capacitance performance than titania (TiO{sub 2}) in the supercapacitor application due to the extraordinarily improved electrical conductivity. Such an electrochemical capacitance can be further enhanced by increasing aspect ratio of TiN nanoarray from short nanotubes to long nanopores. A flexible supercapacitor has been constructed using two symmetrical TiN nanoarray electrodes and a polyvinyl alcohol (PVA) gel electrolyte with H{sub 2}SO{sub 4}–KCl–H{sub 2}O–EG. Such a supercapacitor has a highly improved potential window and still keeps good electrochemical energy storage. TiN nanoarray with a high aspect ratio can act well as an ultra thin film electrode material of flexible supercapacitor to contribute a superior capacitance performance.

  4. Perbedaan konsumsi buah dan sayur pada anak sekolah dasar yang obes dan tidak obes di Kota Yogyakarta dan Kabupaten Bantul

    Directory of Open Access Journals (Sweden)

    Irma Nuraeni

    2016-03-01

    gender and energy intake, showed that obese  children who rarely consuming fruits (<7 times/week (OR=2,24, 95%CI: 1.53-3.28, rarely consuming vegetables (<7 times/week (OR=2,52, 95%CI: 1,70-3,73, and consuming fruits and vegetables less than 5 servings/day (equivalent to 400 g/day (OR= 4,59, 95%CI:2,11-10,00 were greater risk for being obesity.Conclusion:Obese children had rarely and less consume of fruits and vegetables than that did in non-obese children at Yogyakarta Municipality and District of Bantul. The children rarely and less consuming fruits and vegetables increased the risk of obesity.KEYWORDS: children obesity, vegetable, fruitABSTRAKLatar Belakang: Indonesia saat ini mengalami masalah gizi ganda, yaitu masalah gizi kurang dan gizi lebih. Kelebihan  gizi atau obesitas pada anak dan remaja apabila tidak diatasi maka berdampak menjadi obesitas pada masa dewasa yang berpotensi mengalami penyakit tidak menular, seperti jantung, hipertensi dan diabetes mellitus. Prevalensi obesitas pada anak di Provinsi Daerah Istimewa Yogyakarta mengalami peningkatan dari tahun ke tahun (1; 2. Obesitas disebabkan ketidakseimbangan antara masukan dengan keluaran energi. Anak cenderung mengkonsumsi padat energi yang berasa manis dan berlemak tinggi serta makanan kurang serat dari buah dan sayur. Beberapa penelitian menunjukkan peningkatan risiko obesitas pada orang yang kurang konsumsi buah dan sayur.Tujuan: Untuk mengetahui perbedaan frekuensi dan jumlah konsumsi buah dan sayur pada anak SD obes dan tidak obes di Kota Yogyakarta dan Kabupaten Bantul serta peran konsumsi buah dan sayur terhadap kejadian obesitas. Metode: Rancangan penelitian ini adalah case-control, 244 kasus (anak obes dan 244 kontrol (anak tidak obes. Subjek penelitian adalah anak usia 6-12 tahun yang duduk di kelas 1 hingga kelas 5 sekolah dasar di Kota Yogyakarta dan di Kabupaten Bantul. Data identitas diperoleh dari kuesioner terstruktur, sedangkan data frekuensi dan jumlah konsumsi buah dan sayur diperoleh

  5. ANEMIA DAN LAMA KONSUMSI OBAT ANTI TUBERCULOSIS

    Directory of Open Access Journals (Sweden)

    Anny Thuraidah

    2017-12-01

    Full Text Available Tuberkulosis adalah penyakit infeksi akibat kuman Mycobacterium tuberculosis yang dapat menginfeksi beberapa organ tubuh, diantaranya paru-paru, ginjal, dan tulang.Tujuan pengobatan tuberkulosis adalah memusnahkan basil tuberkulosis dengan cepat dan mencegah kekambuhan. Obat anti tuberkulosis (OAT dapat diterima dalam terapi, namun mempunyai efek toksik seperti agranulositosis, eosinofilia, trombositopenia dan anemia. Penelitian ini bertujuan untuk mengetahui hubungan lama konsumsi OAT pada pasien TB paru terhadap anemia. Penelitian ini bersifat Survey Analitic dengan rancangan Cross Sectional. Hasil penelitian rata-rata hitung sel darah merah 0 bulan 5,16 106/uL, 2 bulan 4,39 106/uL dan 6 bulan 4,61 106/uL, rata-rata kadar hemoglobin 0 bulan 15,17 g/dL, 2 bulan 12,73 g/dL dan 6 bulan 13,28 g/dL serta ratarata nilai hematokrit 0 bulan 44,26 %, 2 bulan 38,24 % dan 6 bulan 39,04 %. Dari hasil uji Spearman diperoleh nilai signifikan sebesar hitung sel darah merah 0,004 < α (0,05, kadar hemoglobin 0,007 < α (0,05 dan nilai hematokrit 0,015 < α (0,05 sehingga dapat disimpulkan ada hubungan antara lama konsumsi obat anti tuberkulosis pada pasien TB paru terhadap anemia dan nilai correlation coefficient hitung sel darah merah -0,531, kadar hemoglobin -0,479 serta nilai hematokrit -0,440 berarti memiliki kekuatan hubungan yang sedang. Disarankan untuk penelitian selanjutnya menggunakan parameter yang berbeda seperti jumlah trombosit, kadar AST/ALT dan sebaiknya menggunakan sampel atau pasien yang sama dari 0 bulan sampai 6 bulan.

  6. ISOLASI DAN IDENTIFIKASI KOMPONEN KIMIA MINYAK ATSIRI DAUN LEGUNDI (Vitex trifolia L.) DAN UJI AKTIVITAS ANTIMIKROBANYA

    OpenAIRE

    Mufidah, S.Si., M.Si., Apt.

    2004-01-01

    Dalam rangka pengembangan obat tradisional, telah dilakukan isolasi dan uji aktivitas antimikroba minyak atsiri daun legundi (Vitex trifolia, L.) familia Verbenaceae. Penelitian ini bertujuan untuk mengisolasi, menganalisis dan menguji aktivitas antimikroba minyak atsiri daun legundi. Isolasi dilakan dengan alat destilasi Stahl, diperoleh minyak atsiri sebanyak 0,02% v/b daun segar dan 0,08% v/b daun kering. Dari interpretasi data GC-MS tampak adanya 1,8 ???Cineole (17,83%), ???-terpiny...

  7. Status Oral Higiene Dan Periodontal Pada Pasien Diabetes Melitus Dan Non- Diabetes Di RSUD Dr. Pirngadi

    OpenAIRE

    Butar-Butar, Mardiah Rizqo

    2014-01-01

    Diabetes melitus adalah penyakit gangguan metabolisme ditandai dengan meningkatnya kadar gula darah yang terjadi karena kelainan sekresi insulin, kerja insulin, atau kedua-duanya. Diabetes melitus merupakan salah satu penyakit sistemik yang berperan sebagai faktor risiko penyakit periodontal. Penelitian ini bertujuan untuk mengetahui status oral higiene dan periodontal dan odd rasio periodontitis pada pasien Diabetes melitus dan non-Diabetes. Rancangan penelitian adalah case-control. Popul...

  8. Penskalaan Butir Format Respons Pilihan dan Respons Bebas Berdasarkan Model Rasch dan Partial Credit

    Directory of Open Access Journals (Sweden)

    Eko Hariadi

    2007-06-01

    Full Text Available Penelitian melihat pengaruh jumlah parameter butir, kategori respons bebas (RB, pengaruh sampel terhadap akurasi estimasi parameter kemampuan untuk menghasilkan estimasi yang stabil dan pengaruh pembobotan butir RP dan butir RB terhadap kesalahan baku. Penelitian dalam dua tahap, simulasi menggunakan 30 kondisi dengan replikasi 50 dengan variabel panjang tes, jumlah kategori, dan jumlah parameter butir, dan analisis deskriptif, dilanjutkan penerapan penskalaan gabungan butir tipe respons pilihan (rp dan butir respons bebas (rb pada konstruksi tes elektronika yang terdiri 40 butir pilihan ganda dan 4 butir jawaban tersusun, 3 butir memiliki lima kategori jawaban dan 1 butir dengan 4 kategori jawaban, melibatkan 355 siswa. Hasil penelitian menunjukkan: ukuran sampel kurang berpengaruh pada root mean square error atau (RSME> dan korelasi antara 9 dengan 0, namun berpengaruh terhadap akurasi estimasi parameter butir pilihan ganda (/>/y,dan parameter butir respons tersusun (3^- Jumlah parameter butir berpengaruh terhadap parameter kemampuan, tetapi tidak berpengaruh terhadap akurasi dari b^, dan S„,. Estimasi dari parameter tingkat kesulitan butir jawaban tersusun tiga kategori lebih akurat daripada butir jawaban tersusun lima kategori. Estimasi tahan {robust untuk parameter kesulitan butir jawaban tersusun 5 kategori memerlukan sampel minimal 250 responden, sedangkan untuk butir respons tersusun 3 kategori memerlukan sampel minimal 100 responden. Estimasi parameter kemampuan dari skor total (0^^ tidak sama dengan rata-rata jumlah tbeta dari masing-masing subtes (0^ + 0CR. Theta dari tes yang dikalibrasi bersama-sama berbeda dengan theta dari total subtes yang dikalibrasi secara terpisah. Korelasi kemampuan yang mengunakan pembobotan dan kemampuan tanpa pembobotan mempunyai suatu rentang dari 0,988 sampai 0,948. Kata kunci: penyekaiaan, model rash dan partial credit.

  9. Prinsip Transparansi dalam Perjanjian TBT dan SPS

    Directory of Open Access Journals (Sweden)

    Dina Widyaputri Kariodimedjo

    2012-02-01

    Full Text Available Transparency principle in the TBT and SPS Agreement is implemented by notification. Its application is prepared by related agencies through the making of regulations, establishment of enquiry points, building capacity and infrastructure. It guarantees certainty, predictability and credibility of Indonesia in international trade, and its application should not undermine national trade policy. Prinsip transparansi dalam Perjanjian TBT dan SPS diterapkan melalui notifikasi. Penerapan prinsip ini dilakukan oleh instansi-instansi terkait melalui pembuatan peraturan, upaya terkait kelembagaan, SDM dan infrastruktur. Prinsip yang bertujuan menciptakan kepastian, konsistensi bagi perdagangan dan kredibilitas Indonesia dalam perdagangan internasional, harus dilakukan tanpa mengorbankan kepentingan untuk mengamankan kebijakan impor nasional.

  10. SPIRITUALITAS MURIA: AKOMODASI TRADISI DAN WISATA

    Directory of Open Access Journals (Sweden)

    Ahmad Falah

    2012-12-01

    Tradisi “nyekar” sangat dikenal oleh orang Jawa, khususnya di makam Muria Kudus Jawa Tengah. Penelitian ini mengungkap bahwa kebanyakan peziarah makam ini bertujuan untuk mendapatkan keberkahan (tabarrukan, keamanan dan kemudahan dalam hidup, menguasai ilmu linuwih, disembuhkan dari penyakit, dan mengharapkan kebaikan dari nenek moyang. Kunjungan mereka ke makam itu memberikan dampak yang besar bagi kehidupan masyarakat, baik secara ekonomi maupun sosial. Dalam perspektif ekonomi, lebih dari 1.500 tenaga kerja tergantung pada keberadaan makam Muria. Dampak yang lain adalah slidaritas setempat, kompetisi sosial, dan kesempatan kerja yang mengakibatkan munculnya tumbuhnya pragmatisme di kalangan anggota masyarakat Muria.

  11. Media Sosial dan Perkembangan Komunikasi Korporat

    Directory of Open Access Journals (Sweden)

    Rina Juwita

    2017-07-01

    Full Text Available Kehadiran media sosial telah mengubah aktivitas komunikasi korporat dan dengan cepat merevolusi bagaimana kampanye atau program public relations berjalan. Jika dibandingkan dengan cara tradisional yang mengandalkan pada output murni, media sosial memaksa komunikasi korporat beralih pada proses dialog dimana para pemangku kepentingan, dan bukan hanya perusahaan sama-sama memiliki kekuasaan terhadap pesan yang beredar. Media sosial merupakan alat komunikasi revolusioner yang mengubah secara cepat bagaimana praktik PR menjadi bagian integral dari komunikasi korporat bagi sejumlah perusahaan dan menawarkan pilihan baru bagi para praktisi PR pada setiap aspek proses komunikasi yang dilakukan.

  12. Inovasi Desain, Teknologi, dan Pemasaran Lewat Website Usaha Kecil Menengah Batik dan Lutik (Lurik Batik di Kecamatan Laweyan Surakarta

    Directory of Open Access Journals (Sweden)

    Anastasia Riani Suprapti

    2016-12-01

      Tujuan penelitian terapan ini adalah untuk meningkatkan produktivitas dan mengembangkan produk batik dan lutik yang ada di wilayah Kecamatan Laweyan Surakarta dengan inovasi desain dan teknologi baru. Program ini bekerja sama dengan mitra UKM Batik Dewi (UKM 1 dan Batik Sinung Rejeki (UKM2 yang terletak di Kecamatan Laweyan. Pengusaha batik Laweyan dengan produknya berupa batik dan tekstil bermotif batik (printing dan cap dalam era globalisasi sekarang ini ternyata memiliki daya tahan yang baik, ditengah persaingan dengan produk sejenis dari daerah lain maupun dari luar negeri. Secara garis besar pola yang digunakan dalam implementasi penelitian ini meliputi: diskusi (FGD, kerja bengkel, operasional pabrik, pelatihan dan pendampingan (kelompok dan individu. Seperti halnya Usaha Kecil Menengah pada umumnya, pengusaha batik di Laweyan juga menghadapi masalah Internal meliputi  permodalan, inovasi desain, pemasaran, dan manajemen keuangan, yang meliputi administrasi keuangan/pembukuan. Beberapa solusi yang ditawarkan untuk mengatasi permasalahan yang dihadapi diantaranya adalah melakukan Inovasi desain dan teknologi, pengaturan layout pabrik, dan pemasaran lewat web. Selain itu mengembangkan desain motif batik yang lebih diminati pasar diberikan juga untuk pengembangan teknik kombinasi batik-lurik ikat dengan cara lukis dan pengelantangan. Penggunaan media teknologi informasi dan komunikasi untuk promosi lewat website. Adapun untuk usaha pengembangan manajemen pemasaran,  diusahakan media promosi dan menjalin kerjasama pemasaran  dengan instansi terkait, misalnya dengan mengikuti pameran-pameran di Solo dan Jakarta.

  13. Calcium phosphate-based coatings on titanium and its alloys.

    Science.gov (United States)

    Narayanan, R; Seshadri, S K; Kwon, T Y; Kim, K H

    2008-04-01

    Use of titanium as biomaterial is possible because of its very favorable biocompatibility with living tissue. Titanium implants having calcium phosphate coatings on their surface show good fixation to the bone. This review covers briefly the requirements of typical biomaterials and narrowly focuses on the works on titanium. Calcium phosphate ceramics for use in implants are introduced and various methods of producing calcium phosphate coating on titanium substrates are elaborated. Advantages and disadvantages of each type of coating from the view point of process simplicity, cost-effectiveness, stability of the coatings, coating integration with the bone, cell behavior, and so forth are highlighted. Taking into account all these factors, the efficient method(s) of producing these coatings are indicated finally.

  14. Titanium Loop Heat Pipes for Space Nuclear Radiators, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — This Small Business Innovation Research Phase I project will develop titanium Loop Heat Pipes (LHPs) that can be used in low-mass space nuclear radiators, such as...

  15. Hollow Mill for Extraction of Stripped Titanium Screws: An Easy ...

    African Journals Online (AJOL)

    countries. The known alternative in such condition is ... Key words: Hollow mill, stripped screws, titanium locked plates ... used a locally manufactured stainless steel hollow mill, ... head ‑ plate hole” assembly as a mono‑block single unit. In.

  16. Predictions of titanium alloy properties using thermodynamic modeling tools

    Science.gov (United States)

    Zhang, F.; Xie, F.-Y.; Chen, S.-L.; Chang, Y. A.; Furrer, D.; Venkatesh, V.

    2005-12-01

    Thermodynamic modeling tools have become essential in understanding the effect of alloy chemistry on the final microstructure of a material. Implementation of such tools to improve titanium processing via parameter optimization has resulted in significant cost savings through the elimination of shop/laboratory trials and tests. In this study, a thermodynamic modeling tool developed at CompuTherm, LLC, is being used to predict β transus, phase proportions, phase chemistries, partitioning coefficients, and phase boundaries of multicomponent titanium alloys. This modeling tool includes Pandat, software for multicomponent phase equilibrium calculations, and PanTitanium, a thermodynamic database for titanium alloys. Model predictions are compared with experimental results for one α-β alloy (Ti-64) and two near-β alloys (Ti-17 and Ti-10-2-3). The alloying elements, especially the interstitial elements O, N, H, and C, have been shown to have a significant effect on the β transus temperature, and are discussed in more detail herein.

  17. Comparison of porosity measurement techniques for porous titanium scaffolds evaluation

    International Nuclear Information System (INIS)

    Oliveira, M.V.; Ribeiro, A.A.; Moreira, A.C.; Moraes, A.M.C.; Appoloni, C.R.; Pereira, L.C.

    2009-01-01

    Porous titanium has been used for grafts and implant coatings as it allows the mechanical interlocking of the pores and bone. Evaluation of porous scaffolds for bone regeneration is essential for their manufacture. Porosity, pore size, pore shape and pore homogeneity are parameters that influence strongly the mechanical strength and biological functionality. In this study, porous titanium samples were manufactured by powder metallurgy by using pure titanium powders mixed with a pore former. The quantification of the porosity parameters was assessed in this work by geometric method and gamma-ray transmission, the non-destructive techniques and metallographic images processing, a destructive technique. Qualitative evaluation of pore morphology and surface topography were performed by scanning electron microscopy and optical microscopy. The results obtained and the effectiveness of the techniques used were compared in order to select those most suitable for characterization of porous titanium scaffolds. (author)

  18. Lunar-derived titanium alloys for hydrogen storage

    Science.gov (United States)

    Love, S.; Hertzberg, A.; Woodcock, G.

    1992-01-01

    Hydrogen gas, which plays an important role in many projected lunar power systems and industrial processes, can be stored in metallic titanium and in certain titanium alloys as an interstitial hydride compound. Storing and retrieving hydrogen with titanium-iron alloy requires substantially less energy investment than storage by liquefaction. Metal hydride storage systems can be designed to operate at a wide range of temperatures and pressures. A few such systems have been developed for terrestrial applications. A drawback of metal hydride storage for lunar applications is the system's large mass per mole of hydrogen stored, which rules out transporting it from earth. The transportation problem can be solved by using native lunar materials, which are rich in titanium and iron.

  19. Compatibility of niobium, titanium, and vanadium metals with LMFBR cladding

    International Nuclear Information System (INIS)

    Wilson, C.N.

    1975-10-01

    A series of laboratory capsule annealing experiments were conducted to assess the compatibility of niobium, vanadium, and titanium with 316 stainless steel cladding in the temperature range of 700 to 800 0 C. Niobium, vanadium, and titanium are cantidate oxygen absorber materials for control of oxygen chemistry in LMFBR fuel pins. Capsule examination indicated good compatibility between niobium and 316 stainless steel at 800 0 C. Potential compatibility problems between cladding and vanadium or titanium were indicated at 800 0 C under reducing conditions. In the presence of Pu/sub 0.25/U/sub 0.75/O/sub 1.98/ fuel (Δanti G 02 congruent to -160 kcal/mole) no reaction was observed between vanadium or titanium and cladding at 800 0 C

  20. An Insoluble Titanium-Lead Anode for Sulfate Electrolytes

    Energy Technology Data Exchange (ETDEWEB)

    Ferdman, Alla

    2005-05-11

    The project is devoted to the development of novel insoluble anodes for copper electrowinning and electrolytic manganese dioxide (EMD) production. The anodes are made of titanium-lead composite material produced by techniques of powder metallurgy, compaction of titanium powder, sintering and subsequent lead infiltration. The titanium-lead anode combines beneficial electrochemical behavior of a lead anode with high mechanical properties and corrosion resistance of a titanium anode. In the titanium-lead anode, the titanium stabilizes the lead, preventing it from spalling, and the lead sheathes the titanium, protecting it from passivation. Interconnections between manufacturing process, structure, composition and properties of the titanium-lead composite material were investigated. The material containing 20-30 vol.% of lead had optimal combination of mechanical and electrochemical properties. Optimal process parameters to manufacture the anodes were identified. Prototypes having optimized composition and structure were produced for testing in operating conditions of copper electrowinning and EMD production. Bench-scale, mini-pilot scale and pilot scale tests were performed. The test anodes were of both a plate design and a flow-through cylindrical design. The cylindrical anodes were composed of cylinders containing titanium inner rods and fitting over titanium-lead bushings. The cylindrical design allows the electrolyte to flow through the anode, which enhances diffusion of the electrolyte reactants. The cylindrical anodes demonstrate higher mass transport capabilities and increased electrical efficiency compared to the plate anodes. Copper electrowinning represents the primary target market for the titanium-lead anode. A full-size cylindrical anode performance in copper electrowinning conditions was monitored over a year. The test anode to cathode voltage was stable in the 1.8 to 2.0 volt range. Copper cathode morphology was very smooth and uniform. There was no

  1. Mechanical strength and stiffness of biodegradable and titanium osteofixation systems

    NARCIS (Netherlands)

    Buijs, Gerrit J.; van der Houwen, Eduard B.; Bos, Rudulf R. M.; Verkerke, Gijsbertus J.

    Purpose: To present relevant mechanical data to simplify the selection of an osteofixation system for situations requiring immobilization in oral and maxillofacial surgery. Materials and Methods: Seven biodegradable and 2 titanium osteofixation systems were investigated. The plates and screws were

  2. Grain growth in ultrafine titanium powders during sintering

    International Nuclear Information System (INIS)

    Panigrahi, B.B.; Godkhindi, M.M.

    2006-01-01

    Grain growth behaviour of fine (∼3 μm) and attrition milled nanocrystalline (∼32 nm) titanium powers during sintering have been studied. The activation energies of grain growth (Q g ) in fine titanium were found to be 192.9 and 142.4 kJ/mol at lower and higher temperature ranges, respectively. The nanocrystalline titanium showed very low values of Q g (54.6 kJ/mol) at lower temperatures and it increased to 273.2 kJ/mol at higher temperatures. The constant (n) in nano Ti system was found to have unusually very high values of 6.5-8.2. The grain boundary rotation along with the diffusional processes could be the grain growth mechanism in nanocrystalline and in fine titanium powders

  3. Development and Characterization of Titanium Compound N anostructures

    Science.gov (United States)

    Zhou, Zhou

    The development and characterization of titanium compound nanostructures have been achieved, for potential applications in energy industry. Oil and gas, one of the traditional industry fields, observes accumulating demands on active implementations of nanotechnology, for the numerous advantages that nanomaterials can introduce to both product performances and field operations. By using chemical vapor deposition and liquid exfoliation, various titanium compound nanostructures have been synthesized through this project. Attractively, these two material fabrication methods have been recognized to be industrial friendly in terms of cost efficiency and productivity. The development of nanostructures, aiming at oil and gas field applications, presents novel solutions for existing issues, such as low durability of drilling tools, high friction in mechanical operations and ineffective heat dissipation. Titanium compound nanostructures, including titanium borides, nitrides and sulfides are therefore investigated for such applications as protective coating, lubrication and thermal management.

  4. Green oxidations: Titanium dioxide induced tandem oxidation coupling reactions

    OpenAIRE

    Jeena, Vineet; Robinson, Ross S

    2009-01-01

    Summary The application of titanium dioxide as an oxidant in tandem oxidation type processes is described. Under microwave irradiation, quinoxalines have been synthesized in good yields from the corresponding ?-hydroxyketones.

  5. One half of a prototype titanium vacuum chamber

    CERN Multimedia

    CERN PhotoLab

    1973-01-01

    Designed and constructed in the ISR Department, it could be for general use at intersection regions. The use of titanium instead of stainless steel increases the "transparency" to particles by a factor of about two for the same wall thickness.

  6. Contact Stress Design Parameters for Titanium Bearings, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — Air-Lock's Phase I effort tested the effects of ball induced contact stresses on Titanium bearing races. The contact stress design limit that would achieve a...

  7. Titanium Nanosurface Modification by Anodization for Orthopedic Applications

    National Research Council Canada - National Science Library

    Yao, Chang; Slamovich, Elliott B; Webster, Thomas J

    2005-01-01

    .... For this reason, the objective of the present in vitro study was to modify the surface of conventional titanium to include nanostructured surface features that promote the functions of osteoblasts (bone-forming cells...

  8. Synthesis and characterization of nano silicon and titanium nitride ...

    Indian Academy of Sciences (India)

    The characterization techniques indicated ... Scalable synthesis; microwave plasma; chemical synthesis; nanoparticles. 1. Introduction ... used but very few methods are available to produce silicon and titanium ... current (A). (m3/h). 1. Si. 2.1.

  9. Sorption kinetics of cesium on hydrous titanium dioxide

    International Nuclear Information System (INIS)

    Altas, Y.; Tel, H.; Yaprak, G.

    2003-01-01

    Two types of hydrous titanium dioxide possessing different surface properties were prepared and characterized to study the sorption kinetics of cesium. The effect of pH on the adsorption capacity were determined in both type sorbents and the maximum adsorption percentage of cesium were observed at pH 12. To elucidate the kinetics of ion-exchange reaction on hydrous titanium dioxide, the isotopic exchange rates of cesium ions between hydrous titanium dioxides and aqueous solutions were measured radiochemically and compared with each other. The diffusion coefficients of Cs + ion for Type1 and Type2 titanium dioxides at pH 12 were calculated as 2.79 x 10 -11 m 2 s -1 and 1.52 x 10 -11 m 2 s -1 , respectively, under particle diffusion controlled conditions. (orig.)

  10. Titanium dioxide nanoparticles cause genotoxicity in human lung epithelial cells

    Science.gov (United States)

    The use of engineered nanoparticles in consumer products is steadily increasing. However, the health effects of exposure to these nanoparticles are not thoroughly understood. This study investigated the genotoxicity of six titanium dioxide and two cerium oxide nanoparticles of va...

  11. Pengembangan Sistem Informasi Akuntansi Dan Pengelolaan Keuangan Modul Bendahara Menggunakan Teknologi Java dan PostgreSQL

    Directory of Open Access Journals (Sweden)

    Alfie Satria Hidayat

    2012-09-01

    Full Text Available Penerapan sistem informasi saat ini sudah menjadi kebutuhan yang krusial bagi proses bisnis instansi pemerintah. Direktorat Jenderal Perbendaharaan adalah salah satu instansi pemerintah di bawah Kementerian Keuangan yang memiliki tugas pokok dan fungsi terkait dengan siklus anggaran (budget cycle mulai dari perencanaan, pelaksanaan, sampai pertanggungjawaban anggaran. Saat ini terdapat banyak aplikasi yang dikembangkan oleh Direktorat Jenderal Perbendaharaan untuk membantu satuan kerja sebagai mitra kerja dalam pengelolaan Anggaran Pendapatan dan Belanja Negara. Namun, aplikasi-aplikasi tersebut belum terintegrasi padahal dalam proses bisnisnya semuanya saling terkait dan berurutan. Selain itu, beberapa aplikasi menggunakan database yang sama sehingga dimungkinkan terjadi duplikasi data dan memerlukan sinkronisasi jika terjadi perubahan. Diantara aplikasi yang ada, salah satunya terdapat aplikasi pembukuan bendahara. Melalui penelitian ini, penulis akan membuat Sistem Informasi Akuntansi dan Pengelolaan Keuangan (SIAPKAN  khususnya modul bendahara sebagai solusi untuk menjawab permasalahan dengan mengintegrasikan semua aplikasi yang terkait dalam proses siklus anggaran. Aplikasi ini merupakan aplikasi berbasis web yang akan dikembangkan dengan menggunakan bahasa pemrograman Java (Servlet dan JSP. Aplikasi ini akan menggunakan single database yaitu dengan database PostgreSQL sehingga data yang diolah dan disajikan lebih akurat dan proses bisnis akan berjalan lebih efektif dan efisien.

  12. Isolasi dan Identifikasi Mikroba Lipolitik dari Limbah Cair Surimi dan Rajungan

    Directory of Open Access Journals (Sweden)

    Devi Ambarwati Oktavia

    2017-05-01

    Full Text Available Industri pengolahan hasil perikanan di sepanjang pantai Utara Jawa seperti pengalengan rajungan di Cirebon (Jawa Barat dan pengolahan surimi di Kendal (Jawa Tengah, menghasilkan air limbah yang mengandung banyak protein dan lemak. Bakteri yang hidup di limbah yang banyak mengandung protein dan lemak tersebut diperkirakan memiliki kemampuan untuk menghidrolisis lemak menjadi asam lemak dan gliserol sehingga berpotensi untuk dimanfaatkan sebagai bioremedian alami bagi penanganan air limbah hasil perikanan di tempat lain. Penelitian ini bertujuan untuk melakukan penapisan dan identifikasi bakteri lipolitik potensial sebagai bioremedian air limbah perikanan. Penapisan dilakukan terhadap 11 isolat bakteri lipolitik dari air limbah yang diambil dari industri pengalengan rajungan di Cirebon dan pengolahan surimi di Kendal dengan menggunakan media spesifik agar tributirin. Isolat bakteri lipolitik potensial ditentukan berdasarkan zona bening yang terbentuk di sekitar koloni, yaitu sekurang-kurangnya 6 mm. Isolat bakteri potensial ini selanjutnya diidentifikasi secara molekuler berdasarkan analisis sekuen 16S-rDNA. Dari penapisan diperoleh empat isolat bakteri potensial, yaitu isolat SPB, SHj, SOr dan SKn. Identifikasi molekuler menunjukkan bahwa isolat SPB dan SHj masing-masing adalah Serratia fonticola 10AdanBacillus cereus strain 103.2.2dengan kemiripan 97%, isolat SOr memiliki kemiripan 96% dengan Bacillus pumilus strain vit bac1 dan isolat SKn adalah Enterococcus pseudoavium strain L3C21K2dengan kemiripan 87%. Keempat isolat tersebut berpotensi untuk dimanfaatkan sebagai bioremedian pada air limbah dari industri pengolahan hasil perikanan di Indonesia.

  13. EKSISTENSI DAN SEBARAN NYAMUK AEDES AEGYPTI DAN AEDES ALBOPICTUS DI KAMPUS UNIVERSITAS HASANUDDIN MAKASSAR

    Directory of Open Access Journals (Sweden)

    Yosefina Dota T

    2015-03-01

    Full Text Available Penelitian yang bertujuan untuk mengetahui eksistensi dan sebaran nyamuk Aedes aegypti dan Aedes albopictus telah dilakukan di Kampus Universitas Hasanuddin, Kec. Tamalanrea, Makassar. Penelitian bersifat eksploratif dengan melakukan sampling terhadap lima lokasi yaitu : a Fak. Peternakan (Utara, b Fak. Hukum (Timur, c Pusat Kegiatan Penelitian/PKP (Selatan, d Workshop/Dekat Pondokan mahasiswa (Barat dan e Fak. MIPA (Tengah. Sampling nyamuk menggunakan metode ovitrap (menggunakan attraktan Eluisine Indica L. dan survei terhadap berbagai tempat penampungan air. Sampel telur dan larva nyamuk yang diperoleh disimpan dalam microtube berisi alkohol 70% kemudian diidentifikasi berdasarkan Rueda (2004. Hasil penelitian menunjukkan bahwa Nyamuk Ae. aegypti dan Ae. albopictus ditemukan hidup dan berkembang biak di kampus Universitas Hasanuddin, Makassar. Eksistensi dan sebaran kedua jenis nyamuk tersebut dipengaruhi oleh faktor adanya manusia/masyarakat kampus yang beraktivitas baik di dalam ruangan (indoor maupun di luar ruangan (outdoor, adanya berbagai tempat penampungan air baik buatan (bak mandi, ember maupun barang bekas (botol/kaleng bekas, tempurung kelapa, vegetasi/tanaman dan berbagai macam hewan yang berada di sekitaran kampus. Hasil penelitian dalam ruangan (indoor menunjukkan bahwa nyamuk Ae. aegypti lebih banyak ditemukan hidup di dalam ruangan gedung PKP sedangkan Ae.albopictus lebih banyak di Fak. Hukum. Hasil penelitian di luar ruangan (outdoor menunjukkan bahwa nyamuk Ae. aegypti lebih banyak ditemukan hidup di area Workshop sedangkan Ae.albopictus lebih banyak di area PKP.

  14. Laser Cladding of TiC for Better Titanium Components

    OpenAIRE

    Sampedro, Jesús; Pérez, I; CÁRCEL GONZÁLEZ, BERNABÉ; Ramos, José Antonio; Amigó Borrás, Vicente

    2011-01-01

    Pure commercial titanium is widely used because of its high corrosion resistance and lower cost compared with other titanium alloys, in particular when there is no high wear requirements. Nevertheless, the wear resistance is poor and surface damage usually occurs in areas under contact loadings. Laser cladding is a suitable technique for manufacturing precise and defect free coatings of a dissimilar material with higher wear and corrosion resistance. In this work a good understanding of laser...

  15. LASER SURFACE MODIFICATION OF TITANIUM ALLOYS — A REVIEW

    OpenAIRE

    Y. S. TIAN; C. Z. CHEN; D. Y. WANG; T. Q. LEI

    2005-01-01

    Recent developments of laser surface modification of titanium alloys for increasing their corrosion, wear and oxidation resistance are introduced. The effects of laser processing parameters on the resulting surface properties of titanium alloys are reviewed. The problems to be solved and the prospects in the field of laser modification of Ti alloys are discussed. Due to the intrinsic properties, a laser beam can be focused onto the metallic surface to produce a broad range of treatments depen...

  16. Study of aging and ordering processes in titanium carbide

    International Nuclear Information System (INIS)

    Arbuzov, M.P.; Khaenko, B.V.; Kachkovskaya, Eh.T.

    1977-01-01

    Aging and ordering processes in titanium carbide were investigated on monocrystals (fragments of alloys) with the aid of roentgenographic method. The sequence of phase transformations during aging was ascertained,and a monoclinic structure of the carbon atoms ordering is suggested. The microhardness of titanium carbide was studied as a function of the heat treatment of alloys and the main factors (ordering and dislocation structure) which govern the difference in the microhardness of hardened and aged (annealed) specimens were determined

  17. Candida albicans biofilm on titanium: effect of peroxidase precoating

    Directory of Open Access Journals (Sweden)

    Mohamed Ahariz

    2010-08-01

    Full Text Available Mohamed Ahariz1, Philippe Courtois1,21Laboratory of Experimental Hormonology, Université Libre de Bruxelles, Brussels, 2UER de Biologie Médicale, Haute Ecole Francisco Ferrer, Brussels, BelgiumAbstract: The present study aimed to document Candida albicans biofilm development on titanium and its modulation by a peroxidase-precoated material which can generate antimicrobials, such as hypoiodite or hypothiocyanite, from hydrogen peroxide, iodide, or thiocyanate. For this purpose, titanium (powder or foil was suspended in Sabouraud liquid medium inoculated with C. albicans ATCC10231. After continuous stirring for 2–21 days at room temperature, the supernatant was monitored by turbidimetry at 600 nm and titanium washed three times in sterile Sabouraud broth. Using the tetrazolium salt MTT-formazan assay, the titanium-adherent fungal biomass was measured as 7.50 ± 0.60 × 106 blastoconidia per gram of titanium powder (n = 30 and 0.50 ± 0.04 × 106 blastoconidia per cm² of titanium foil (n = 12. The presence of yeast on the surface of titanium was confirmed by microscopy both on fresh preparations and after calcofluor white staining. However, in the presence of peroxidase systems (lactoperoxidase with substrates such as hydrogen peroxide donor, iodide, or thiocyanate, Candida growth in both planktonic and attached phases appeared to be inhibited. Moreover, this study demonstrates the possible partition of peroxidase systems between titanium material (peroxidase-precoated and liquid environment (containing peroxidase substrates to limit C. albicans biofilm formation.Keywords: adhesion, material, oral, yeast

  18. Trial manufacturing of titanium-carbon steel composite overpack

    International Nuclear Information System (INIS)

    Honma, Nobuyuki; Chiba, Takahiko; Tanai, Kenji

    1999-11-01

    This paper reports the results of design analysis and trial manufacturing of full-scale titanium-carbon steel composite overpacks. The overpack is one of the key components of the engineered barrier system, hence, it is necessary to confirm the applicability of current technique in their manufacture. The required thickness was calculated according to mechanical resistance analysis, based on models used in current nuclear facilities. The Adequacy of the calculated dimensions was confirmed by finite-element methods. To investigate the necessity of a radiation shielding function of the overpack, the irradiation from vitrified waste has been calculated. As a result, it was shown that shielding on handling and transport equipment is a more reasonable and practical approach than to increase thickness of overpack to attain a self-shielding capability. After the above investigation, trial manufacturing of full-scale model of titanium-carbon steel composite overpack has been carried out. For corrosion-resistant material, ASTM Grade-2 titanium was selected. The titanium layer was bonded individually to a cylindrical shell and fiat cover plates (top and bottom) made of carbon steel. For the cylindrical shell portion, a cylindrically formed titanium layer was fitted to the inner carbon steel vessel by shrinkage. For the flat cover plates (top and bottom), titanium plate material was coated by explosive bonding. Electron beam welding and gas metal arc welding were combined to weld of the cover plates to the body. No significant failure was evident from inspections of the fabrication process, and the applicability of current technology for manufacturing titanium-carbon steel composite overpack was confirmed. Future research and development items regarding titanium-carbon steel composite overpacks are also discussed. (author)

  19. Laser beam welding of titanium additive manufactured parts

    OpenAIRE

    Wits, Wessel Willems; Jauregui Becker, Juan Manuel

    2015-01-01

    In this paper the joinability of titanium Additive Manufactured (AM) parts is explored. Keyhole welding, using a pulsed laser beam, of conventionally produced parts is compared to AM parts. Metal AM parts are notorious for having remaining porosities and other non-isotropic properties due to the layered manufacturing process. This study shows that due to these deficiencies more energy per unit weld length is required to obtain a similar keyhole geometry for titanium AM parts. It is also demon...

  20. Tribological investigations of perfluoroalkylsilanes monolayers deposited on titanium surface

    International Nuclear Information System (INIS)

    Cichomski, Michał

    2012-01-01

    Therefore the present work reports a systematic study of titanium modification by fluoroalkylsilanes and surface characterization from the tribological point of view. The vapor phase deposition method was used to modify titanium surfaces by fluoroalkylsilanes and the influence of the used modifier on the tribological properties is presented. The modification procedure efficiency, surface structure and morphology were characterized by secondary ion mass spectrometry, infrared spectroscopy and atomic force microscopy. The effectiveness of modification of the titanium surface was monitored by the measurement of the wetting contact angle and the surface free energy. The increase of surface hydrophobicity was observed upon the modification by increasing the wetting contact angle and reducing the surface free energy. The tribological performance of various perfluoroalkylsilanes films on the titanium surface was investigated in mili- and nano-newton load ranges. Dependence of the adhesive force and coefficient of friction values obtained in nano- and micro-scale on fluoroalkyl chain length was observed. Nano- and micro-tribological measurements show that titanium modified by fluoroalkylsilanes has lower adhesion and coefficient of friction than unmodified one. The investigation also indicates a decrease of the friction coefficient with increasing fluoric alkyl chain length. It was found that the titanium modified by fluoroalkylsilanes with longer alkyl chains is a prime candidate for practical use as a lubricant in biomedical and electronic applications. -- Highlights: ► Titanium surface modification by perfluoroalkylsilanes was investigated. ► The effectiveness of modification was monitored by the surface free energy. ► The modification procedure correctness was characterized by ToF-SIMS, AFM, FT-IR measurements. ► The tribological performance of modified titanium in differed scale was studied.

  1. Corrosion stability of cermets on the base of titanium nitride

    International Nuclear Information System (INIS)

    Kajdash, O.N.; Marinich, M.A.; Kuzenkova, M.A.; Manzheleev, I.V.

    1991-01-01

    Corrosion resistance of titanium nitride and its cermets in 5% of HCl, 7% of HNO 3 , 10% of H 2 SO 4 is studied. It is established that alloys TiN-Ni-Mo alloyed with chromium (from 10 to 15%) possess the highest corrosion resistance. Cermet TiN-Cr has the higher stability than titanium nitride due to formation of binary nitride (Ti, Cr)N

  2. Enhanced ultrasonically assisted turning of a β-titanium alloy.

    Science.gov (United States)

    Maurotto, Agostino; Muhammad, Riaz; Roy, Anish; Silberschmidt, Vadim V

    2013-09-01

    Although titanium alloys have outstanding mechanical properties such as high hot hardness, a good strength-to-weight ratio and high corrosion resistance; their low thermal conductivity, high chemical affinity to tool materials severely impair their machinability. Ultrasonically assisted machining (UAM) is an advanced machining technique, which has been shown to improve machinability of a β-titanium alloy, namely, Ti-15-3-3-3, when compared to conventional turning processes. Copyright © 2013 Elsevier B.V. All rights reserved.

  3. Ultrasonic Surface Treatment of Titanium Alloys. The Submicrocrystalline State

    Science.gov (United States)

    Klimenov, V. A.; Vlasov, V. A.; Borozna, V. Y.; Klopotov, A. A.

    2015-09-01

    The paper presents the results of the research on improvement of physical-and- mechanical properties of titanium alloys VT1-0 and VT6 by modification of surfaces using ultrasonic treatment, and a comprehensive study of the microstructure and mechanical properties of modified surface layers. It has been established that exposure to ultrasonic treatment leads to formation in the surface layer of a structure with an average size of elements 50 - 100 nm, depending on the brand of titanium alloy.

  4. Laser colouring on titanium alloys: characterisation and potential applications

    OpenAIRE

    Franceschini, Federica; Demir, Ali Gökhan; Dowding, Colin; Previtali, Barbara; Griffiths, Jonathan David

    2014-01-01

    Oxides of titanium exhibit vivid colours that can be generated naturally or manipulated through controlled oxidation processes. The application of a laser beam for colouring titanium permits flexible manipulation of the oxidized geometry with high spatial resolution. The laser-based procedure can be applied in an ambient atmosphere to generate long-lasting coloured marks. Today, these properties are largely exploited in artistic applications such as jewellery, eyewear frames, watch components...

  5. Correlation of lattice distortion with photocatalytic activity of titanium dioxide

    International Nuclear Information System (INIS)

    Wang Xia; Shui Miao; Li Rongsheng; Song Yue

    2008-01-01

    The photocatalytic activity of titanium dioxide dispersions on X-3B pigment degradation has been investigated. A variety of factors that would influence the photocatalytic activity such as crystallite size, lattice distortion, and anatase content are discussed in detail. It is found that lattice distortion is the most important one among these factors and is expected to inhibit the hole and electron pair recombination. It determines, to some extent, the photocatalytic efficiency of titanium dioxide dispersions

  6. Titanium zirconium and hafnium coordination compounds with vanillin thiosemicarbazone

    International Nuclear Information System (INIS)

    Konunova, Ts.B.; Kudritskaya, S.A.

    1987-01-01

    Coordination compounds of titanium zirconium and hafnium tetrachlorides with vanillin thiosemicarbazone of MCl 4 x nLig composition, where n=1.5, 4 for titanium and 1, 2, 4 for zirconium and hafnium, are synthesized. Molar conductivity of ethanol solutions is measured; IR spectroscopic and thermochemical investigation are carried out. The supposition about ligand coordination via sulfur and azomethine nitrogen atoms is made. In all cases hafnium forms stable compounds than zirconium

  7. Hydroxyapatite electrodeposition on anodized titanium nanotubes for orthopedic applications

    Energy Technology Data Exchange (ETDEWEB)

    Parcharoen, Yardnapar [Department of Biological Engineering, Faculty of Engineering, King Mongkut' s University of Technology Thonburi, Bangkok (Thailand); Kajitvichyanukul, Puangrat [Center of Excellence on Environmental Research and Innovation, Faculty of Engineering, Naresuan University, Phitsanulok (Thailand); Sirivisoot, Sirinrath [Department of Biological Engineering, Faculty of Engineering, King Mongkut' s University of Technology Thonburi, Bangkok (Thailand); Termsuksawad, Preecha, E-mail: preecha.ter@kmutt.ac.th [Division of Materials Technology, School of Energy, Environment and Materials, King Mongkut' s University of Technology Thonburi, 126 Pracha Uthit Rd., Bang Mod, ThungKhru, Bangkok 10140 (Thailand)

    2014-08-30

    Highlights: • We found that different anodization time of titanium significantly effects on nanotube length which further impacts adhesion strength of hydroxyapatite coating layers. • Adhesion strength of Hydroxyapatite (HA) coated on titanium dioxide nanotubes is better than that of HA coated on titanium plate. • Hydroxyapatite coated on titanium dioxide nanotubes showed higher cell density and better spreading of MC3T3-E1 cells (bone-forming cells) than that coated on titanium plate surface. - Abstract: Nanotubes modification for orthopedic implants has shown interesting biological performances (such as improving cell adhesion, cell differentiation, and enhancing osseointegration). The purpose of this study is to investigate effect of titanium dioxide (TiO{sub 2}) nanotube feature on performance of hydroxyapatite-coated titanium (Ti) bone implants. TiO{sub 2} nanotubes were prepared by anodization using ammonium fluoride electrolyte (NH{sub 4}F) with and without modifiers (PEG400 and Glycerol) at various potential forms, and times. After anodization, the nanotubes were subsequently annealed. TiO{sub 2} nanotubes were characterized by scanning electron microscope and X-ray diffractometer. The amorphous to anatase transformation due to annealing was observed. Smooth and highly organized TiO{sub 2} nanotubes were found when high viscous electrolyte, NH{sub 4}F in glycerol, was used. Negative voltage (−4 V) during anodization was confirmed to increase nanotube thickness. Length of the TiO{sub 2} nanotubes was significantly increased by times. The TiO{sub 2} nanotube was electrodeposited with hydroxyapatite (HA) and its adhesion was estimated by adhesive tape test. The result showed that nanotubes with the tube length of 560 nm showed excellent adhesion. The coated HA were tested for biological test by live/dead cell straining. HA coated on TiO{sub 2} nanotubes showed higher cells density, higher live cells, and more spreading of MC3T3-E1 cells than that

  8. Electrodeposition of niobium and titanium in molten salts

    International Nuclear Information System (INIS)

    Sartori, A.F.; Chagas, H.C.

    1988-01-01

    The electrodeposition of niobium and titanium in molten fluorides from the additions of fluorine niobates and fluorine titanates of potassium is described in laboratory and pilot scale. The temperature influence, the current density and the time deposition over the current efficiency, the deposits structure and the deposits purity are studied. The conditions for niobium coating over copper and carbon steel and for titanium coating over carbon steel are also presented. (C.G.C.) [pt

  9. Mechanism of cesium sorption on potassium titanium hexacyanoferrate

    International Nuclear Information System (INIS)

    Sun Yongxia; Xu Shiping; Song Chongli

    1998-01-01

    The mechanism of cesium sorption on potassium titanium hexacyanoferrate is described. The dependence of the sorption speed on temperature, particle granule size, and the stirring speed is studied. The results show that the sorption process is controlled by liquid film diffusion and particle diffusion. An exchange reaction occurs mainly between K + in the exchanger and Cs + in the solution, i.e. potassium titanium hexacyanoferrate, and Cs + of simulated high-level liquid waste

  10. Swelling behavior of titanium-modified AISI 316 alloys

    International Nuclear Information System (INIS)

    Garner, F.A.; Brager, H.R.; Puigh, R.J.

    1984-01-01

    It appears that titanium additions to stainless steels covering a wide compositional range around the specifications of AISI 316 result only in an increased delay period before neutron-induced void swelling proceeds. Once swelling is initiated the post transient behavior of both annealed and cold-worked titanium-modified steels is quite consistent with that of AISI 316, approaching a relatively temperature-independent swelling rate of approx. 1% per dpa

  11. SIMBOL RAMA DAN EPOS RAMAYANA BAGI RAJA DAN MASYARAKAT JAWA

    Directory of Open Access Journals (Sweden)

    Wachid Eko Purwanto

    2015-06-01

    Full Text Available Epos Ramayana merupakan epos kuno yang ditulis dalam tujuh kanda terdiri atas 24.000 sloka. Di Jawa epos Ramayana pertama kali muncul secara lengkap dalam bentuk relief di Candi Lara Jonggrang yang dibangun sekitar tahun 782 hingga 872 M. Epos tua yang hidup di masyarakat Jawa ini pastilah mempunyai ajaran. Tokoh Rama sebagai tokoh utama merupakan simbol paling utama dalam epos ini. Berkait dengan simbol ajaran, tokoh Rama dalam epos Ramayana Jawa mempunyai fungsi bagi Raja Jawa dan masyarakat Jawa. Bagi raja simbol tokoh Rama memiliki tiga fungsi utama. Pertama sebagai fungsi spiritual. Kedua adalah fungsi legitimasi kekuasaan. Ketiga adalah fungsi pencitraan. Adapun bagi masyarakat Jawa, simbol tokoh Rama memiliki dua fungsi utama. Pertama adalah fungsi spiritual. Kedua adalah fungsi filosofis.

  12. Nanoscale Bonding between Human Bone and Titanium Surfaces: Osseohybridization

    Directory of Open Access Journals (Sweden)

    Jun-Sik Kim

    2015-01-01

    Full Text Available Until now, the chemical bonding between titanium and bone has been examined only through a few mechanical detachment tests. Therefore, in this study, a sandblasted and acid-etched titanium mini-implant was removed from a human patient after 2 months of placement in order to identify the chemical integration mechanism for nanoscale osseointegration of titanium implants. To prepare a transmission electron microscopy (TEM specimen, the natural state was preserved as much as possible by cryofixation and scanning electron microscope/focused ion beam (SEM-FIB milling without any chemical treatment. High-resolution TEM (HRTEM, energy dispersive X-ray spectroscopy (EDS, and scanning TEM (STEM/electron energy loss spectroscopic analysis (EELS were used to investigate the chemical composition and structure at the interface between the titanium and bone tissue. HRTEM and EDS data showed evidence of crystalline hydroxyapatite and intermixing of bone with the oxide layer of the implant. The STEM/EELS experiment provided particularly interesting results: carbon existed in polysaccharides, calcium and phosphorus existed as tricalcium phosphate (TCP, and titanium existed as oxidized titanium. In addition, the oxygen energy loss near edge structures (ELNESs showed a possibility of the presence of CaTiO3. These STEM/EELS results can be explained by structures either with or without a chemical reaction layer. The possible existence of the osseohybridization area and the form of the carbon suggest that reconsideration of the standard definition of osseointegration is necessary.

  13. Titanium diffusion in shinbone of rats with osseointegrated implants.

    Science.gov (United States)

    Grenón, Miriam S; Robledo, José; Ibáñez, Juan Carlos; Sánchez, Héctor J

    2016-11-01

    Dental implants are composed of commercially pure Ti (which is actually an alloy of titanium, and minor or trace components such as aluminium and vanadium). When the implant is inserted, its surface undergoes a number of chemical and mechanical processes, releasing particles of titanium to the medium. The metabolism of free ions of titanium is uncertain; the uptaking processes in the body are not well known, nor their toxic dose. In addition, physical properties of newly formed bone, such as diffusivity and activation energy, are scarce and rarely studied. In this study, we analysed the diffusion of titanium in the titanium-implanted shinbones of six adult male Wistar rats by spatially resolved micro x-ray fluorescence. The measurements were carried out at the microfluorescence station of the x-ray fluorescence (XRF) beamline of the Brazilian synchrotron facility LNLS (from Portuguese 'Laboratorio Nacional de Luz Sincrotron'). For each sample, XRF spectra were taken by linear scanning in area near the new bone formed around the Ti implant. The scanning line shows a clear effect of titanium diffusion whereas calcium intensity presents a different behaviour. Moreover, a clear correlation among the different structures of bones is observed in the Ti and Ca intensities. The results obtained in these measurements may allow determining quantitatively the parameters of diffusion rates and other physical properties of new bone like diffusion coefficients. © 2016 The Authors Journal of Microscopy © 2016 Royal Microscopical Society.

  14. Comparative study about hydrogen sorption in sponge and powder titanium

    International Nuclear Information System (INIS)

    Vasut, Felicia; Preda, Anisoara; Zamfirache, Marius; Ducu, Catalin; Malinovschi, Viorel

    2005-01-01

    Currently, hydrogen may be stored as a compressed gas or a cryogenic liquid. Neither method appears to be practical for many applications in which hydrogen use would otherwise be attractive. For example, gaseous storage of stationary fuel is not feasible because of the large volume or weight of the storage vessels. Liquid hydrogen could be use extensively but the liquefaction process is relatively expensive. The hydrogen can be stored for a long term with a high separation factor, as a solid metal hydride. Using hydride-forming metals and intermetallic compounds, for example, recovery, purification and storage of heavy isotopes in tritium containing system, can solve many problems arising in the nuclear-fuel cycle. The paper presents a comparative study about hydrogen sorption on two titanium structures: powder and sponge. Also, it is presented the characterization, by X-Ray diffraction, of two structures, before and after sorption process. From our results, one can conclude that sorption method is efficient for both samples. Kinetic curves indicates that sorption rate for titanium powder is lower than for sponge titanium. This is the effect of reaction surface, which is larger for powder titanium. Sorption capacity for hydrogen is lower in powder titanium for identical experimental conditions. The difference between storage capacities could be explained by activation temperature, which was lower for titanium powder than for sponge. (authors)

  15. Radius scaling of titanium wire arrays on the Z accelerator

    International Nuclear Information System (INIS)

    Coverdale, C.A.; Denney, C.; Spielman, R.B.

    1999-01-01

    The 20 MA Z accelerator has made possible the generation of substantial radiation (> 100 kJ) at higher photon energies (4.8 keV) through the use of titanium wire arrays. In this paper, the results of experiments designed to study the effects of initial load radius variations of nickel-clad titanium wire arrays will be presented. The load radius was varied from 17.5 mm to 25 mm and titanium K-shell (4.8 keV) yields of greater than 100 kJ were measured. The inclusion of the nickel cladding on the titanium wires allows for higher wire number loads and increases the spectral broadness of the source; kilovolt emissions (nickel plus titanium L-shell) of 400 kJ were measured in these experiments. Comparisons of the data to calculations will be made to estimate pinched plasma parameters such as temperature and participating mass fraction. These results will also be compared with previous pure titanium wire array results

  16. Surface characterization of nickel titanium orthodontic arch wires

    Science.gov (United States)

    Krishnan, Manu; Seema, Saraswathy; Tiwari, Brijesh; Sharma, Himanshu S.; Londhe, Sanjay; Arora, Vimal

    2015-01-01

    Background Surface roughness of nickel titanium orthodontic arch wires poses several clinical challenges. Surface modification with aesthetic/metallic/non metallic materials is therefore a recent innovation, with clinical efficacy yet to be comprehensively evaluated. Methods One conventional and five types of surface modified nickel titanium arch wires were surface characterized with scanning electron microscopy, energy dispersive analysis, Raman spectroscopy, Atomic force microscopy and 3D profilometry. Root mean square roughness values were analyzed by one way analysis of variance and post hoc Duncan's multiple range tests. Results Study groups demonstrated considerable reduction in roughness values from conventional in a material specific pattern: Group I; conventional (578.56 nm) > Group V; Teflon (365.33 nm) > Group III; nitride (301.51 nm) > Group VI (i); rhodium (290.64 nm) > Group VI (ii); silver (252.22 nm) > Group IV; titanium (229.51 nm) > Group II; resin (158.60 nm). It also showed the defects with aesthetic (resin/Teflon) and nitride surfaces and smooth topography achieved with metals; titanium/silver/rhodium. Conclusions Resin, Teflon, titanium, silver, rhodium and nitrides were effective in decreasing surface roughness of nickel titanium arch wires albeit; certain flaws. Findings have clinical implications, considering their potential in lessening biofilm adhesion, reducing friction, improving corrosion resistance and preventing nickel leach and allergic reactions. PMID:26843749

  17. Adhesion of osteoblasts to a nanorough titanium implant surface

    Directory of Open Access Journals (Sweden)

    Gongadze E

    2011-08-01

    Full Text Available Ekaterina Gongadze1, Doron Kabaso2, Sebastian Bauer3, Tomaž Slivnik2, Patrik Schmuki3, Ursula van Rienen1, Aleš Iglič21Institute of General Electrical Engineering, University of Rostock, Rostock, Germany; 2Laboratory of Biophysics, Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia; 3Department of Materials Science, Friedrich-Alexander University of Erlangen-Nurenberg, Erlangen, GermanyAbstract: This work considers the adhesion of cells to a nanorough titanium implant surface with sharp edges. The basic assumption was that the attraction between the negatively charged titanium surface and a negatively charged osteoblast is mediated by charged proteins with a distinctive quadrupolar internal charge distribution. Similarly, cation-mediated attraction between fibronectin molecules and the titanium surface is expected to be more efficient for a high surface charge density, resulting in facilitated integrin mediated osteoblast adhesion. We suggest that osteoblasts are most strongly bound along the sharp convex edges or spikes of nanorough titanium surfaces where the magnitude of the negative surface charge density is the highest. It is therefore plausible that nanorough regions of titanium surfaces with sharp edges and spikes promote the adhesion of osteoblasts.Keywords: osteoblasts, nanostructures, adhesion, titanium implants, osteointegration

  18. [Corrosion resistant properties of different anodized microtopographies on titanium surfaces].

    Science.gov (United States)

    Fangjun, Huo; Li, Xie; Xingye, Tong; Yueting, Wang; Weihua, Guo; Weidong, Tian

    2015-12-01

    To investigate the corrosion resistant properties of titanium samples prepared by anodic oxidation with different surface morphologies. Pure titanium substrates were treated by anodic oxidation to obtain porous titanium films in micron, submicron, and micron-submicron scales. The surface morphologies, coating cross-sectional morphologies, crystalline structures, and surface roughness of these samples were characterized. Electrochemical technique was used to measure the corrosion potential (Ecorr), current density of corrosion (Icorr), and polarization resistance (Rp) of these samples in a simulated body fluid. Pure titanium could be modified to exhibit different surface morphologies by the anodic oxidation technique. The Tafel curve results showed that the technique can improve the corrosion resistance of pure titanium. Furthermore, the corrosion resistance varied with different surface morphologies. The submicron porous surface sample demonstrated the best corrosion resistance, with maximal Ecorr and Rp and minimal Icorr. Anodic oxidation technology can improve the corrosion resistance of pure titanium in a simulated body fluid. The submicron porous surface sample exhibited the best corrosion resistance because of its small surface area and thick barrier layer.

  19. Properties of titanium-alloyed DLC layers for medical applications

    Science.gov (United States)

    Joska, Ludek; Fojt, Jaroslav; Cvrcek, Ladislav; Brezina, Vitezslav

    2014-01-01

    DLC-type layers offer a good potential for application in medicine, due to their excellent tribological properties, chemical resistance, and bio-inert character. The presented study has verified the possibility of alloying DLC layers with titanium, with coatings containing three levels of titanium concentration prepared. Titanium was present on the surface mainly in the form of oxides. Its increasing concentration led to increased presence of titanium carbide as well. The behavior of the studied systems was stable during exposure in a physiological saline solution. Electrochemical impedance spectra practically did not change with time. Alloying, however, changed the electrochemical behavior of coated systems in a significant way: from inert surface mediating only exchange reactions of the environment in the case of unalloyed DLC layers to a response corresponding rather to a passive surface in the case of alloyed specimens. The effect of DLC layers alloying with titanium was tested by the interaction with a simulated body fluid, during which precipitation of a compound containing calcium and phosphorus - basic components of the bone apatite - occurred on all doped specimens, in contrast to pure DLC. The results of the specimens' surface colonization with cells test proved the positive effect of titanium in the case of specimens with a medium and highest content of this element. PMID:25093457

  20. Formation of Biomimetic Hydroxyapatite Coating on Titanium Plates

    Directory of Open Access Journals (Sweden)

    Ievgen Volodymyrovych PYLYPCHUK

    2014-09-01

    Full Text Available Hydroxyapatite (HA has long been used as a coating material in the implant industry for orthopedic implant applications. HA is the natural inorganic constituent of bone and teeth. By coating titanium (base material of implant engineering because of its lightness and durability with hydroxyapatite, we can provide higher biocompatibility of titanium implants, according to HA ability to form a direct biochemical bond with living tissues. This article reports a biomimetic approach for coating hydroxyapatite with titanium A method of modifying the surface of titanium by organic modifiers (for creating functional groups on the surface, followed by formation "self-assembled" layer of biomimetic hydroxyapatite in simulated body fluid (SBF. FTIR and XPS confirmed the formation of hydroxyapatite coatings on titanium surface. Comparative study of the formation of HA on the surface of titanium plates modified by different functional groups: Ti(≡OH, Ti/(≡Si-OH and Ti/(≡COOH is conducted. It was found that the closest to natural stoichiometric hydroxyapatite Ca/P ratio was obtained on Ti/(≡COOH samples. DOI: http://dx.doi.org/10.5755/j01.ms.20.3.4974

  1. Electrodeposition of amine-terminatedpoly(ethylene glycol) to titanium surface

    International Nuclear Information System (INIS)

    Tanaka, Yuta; Doi, Hisashi; Iwasaki, Yasuhiko; Hiromoto, Sachiko; Yoneyama, Takayuki; Asami, Katsuhiko; Imai, Hachiro; Hanawa, Takao

    2007-01-01

    The immobilization of poly(ethylene glycol), PEG, to a solid surface is useful to functionalize the surface, e.g., to prevent the adsorption of proteins. No successful one-stage technique for the immobilization of PEG to base metals has ever been developed. In this study, PEG in which both terminals or one terminal had been modified with amine bases was immobilized onto a titanium surface using electrodeposition. PEG was dissolved in a NaCl solution, and electrodeposition was carried out at 310 K with - 5 V for 300 min. The thickness of the deposited PEG layer was evaluated using ellipsometry, and the bonding manner of PEG to the titanium surface was characterized using X-ray photoelectron spectroscopy after electrodeposition. The results indicated that a certain amount of PEG was adsorbed on titanium through both electrodeposition and immersion when PEG was terminated by amine. However, terminated amines existed at the surface of titanium and were combined with titanium oxide as N-HO by electrodeposition, while amines randomly existed in the molecule and showed an ionic bond with titanium oxide by immersion. The electrodeposition of PEG was effective for the inhibition of albumin adsorption. This process is useful for materials that have electroconductivity and a complex morphology

  2. The immunomodulatory effects of titanium dioxide and silver nanoparticles.

    Science.gov (United States)

    Lappas, Courtney M

    2015-11-01

    Due to their characteristic physical, chemical and optical properties, titanium dioxide and silver nanoparticles are attractive tools for use in a wide range of applications. The use of nanoparticles for biological applications is, however, dependent upon their biocompatibility with living cells. Because of the importance of inflammation as a modulator of human health, the safe and efficacious in vivo use of titanium dioxide and silver nanoparticles is inherently linked to a favorable interaction with immune system cells. However, both titanium dioxide and silver nanoparticles have demonstrated potential to exert immunomodulatory and immunotoxic effects. Titanium dioxide and silver nanoparticles are readily internalized by immune system cells, may accumulate in peripheral lymphoid organs, and can influence multiple manifestations of immune cell activity. Although the factors influencing the biocompatibility of titanium dioxide and silver nanoparticles with immune system cells have not been fully elucidated, nanoparticle core composition, size, concentration and the duration of cell exposure seem to be important. Because titanium dioxide and silver nanoparticles are widely utilized in pharmaceutical, commercial and industrial products, it is vital that their effects on human health and immune system function be more thoroughly evaluated. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. Keberlanjutan dan Perubahan Pakarena Paolle

    Directory of Open Access Journals (Sweden)

    Fifie Febryanti Sukman

    2014-11-01

    Full Text Available Kehadiran Tarian Paolle dalam masyarakat Bantaeng merupakan latar belakangkebiasaan yang mengikuti tradisi leluhur mereka yang dilakukan sejak zaman dahulumelalui upacara adat yang memiliki Paolle Dance di dalamnya. Perubahan dari segibentuk Tarian Paolle terletak pada seorang penari, tempat, dan kostum. Para penariPaolle hari ini juga berbeda dari penari pertama pada zaman Kerajaan Paolle. Sepertipada hari-hari tertentu, para penari Raya Paolle adalah gadis remaja yang masihdalam keadaan suci atau tidak menstruasi, di saat para penari menjadi orang tua,mereka memiliki banyak pengalaman hidup dalam menari, sebuah praktik yangpada awalnya merupakan milik kerajaan, yang dapat dipilih dan dilihat oleh publikdi lapangan. Kostum atau pakaian yang digunakan para penari adalah irisan hitambodo yang sangat tipis dan sekarang hal itu berubah menjadi merah. KeberlanjutanTarian Paolle di masa sekarang harus dilihat dalam pernikahan atau baby shower.Masyarakat Bantaeng masih menunjukkan tarian ini dalam siklus hidup, misalnya,dalam acara pernikahan, sunat atau hanya berfungsi sebagai hiburan Tarian Paolle. Continuities and Changes of Pakarena Paolle. The background presence of PaolleDance in Bantaeng societies is a habit that follows the customs of their ancestors whohave practiced them since the time immemorial through the traditional ceremony that hasPaolle Dance in it. Changes in terms of the shape of Paolle Dance depend on a dancer,a venue, and costumes. Today’s Paolle Dancers are also different from the first dancers inKingdom era of Paolle. On the days of the Kingdom Paolle, dancers were teenage girls whowere still in a state of purity or not menstruation, but now dancers are the parents becausethey have a lot of life experiences in dancing, a practice that was originally familiarizedin the kingdom can be seen by the public in the field. Costume outfit that used a very thinblack wedge of bodo now turns into red. Paolle Dance sustainability in the

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

    Directory of Open Access Journals (Sweden)

    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

  5. Perubahan Eksternal, Soft Skills Dan Kurikulum Kesehatan

    Directory of Open Access Journals (Sweden)

    Elfindri Elfindri

    2010-11-01

    Full Text Available Tulisan ini menyoroti begitu pentingnya tingkah laku kesehatan rumah tangga ‘household health behavior’1 didorong dan direkayasa untuk meminimumkan efek dari persebaran virus. Sekiranya pengetahuan dan kesadaran akan hal ini rendah, maka untuk kasus negara berkembang seperti Indonesia, perkembangan berbagai jenis penyakit degeneratif akan semakin sulit dicegah. Meluasnya persoalan ini kemudian akan berdampak kepada semakin besarnya biaya pencegahannya, dan dampak dari kecepatan virus bisa berbahaya lebih besar lagi. Salah satu implikasi adalah pencegahan dapat dilakukan melalui perbaikan kurikulum pendidikan akan bahaya dari persebaran virus. AIDS, FLU Burung, Flu Babi, Demam Berdarah, dan sebagainya cukup memusingkan pelayanan kesehatan, termasuk insektisida. Pemutakhiran kurikulum tentunya bermanfaat untuk memajukan pendidikan kesehatan, khususnya pendidikan keperawatan, unsur soft skills sangat penting, selain dari perubahan kognitif.

  6. Kreativitas Desain Kuliner dan Sistem Inovasi Lokal

    Directory of Open Access Journals (Sweden)

    Yasraf Amir Pialang

    2016-02-01

    ABSTRAK   Pengembangan kreativitas pada sebuah kelompok, kelas sosial atau komunitas sangat ditentukan oleh modal yang diinvestasikan dalam ranah kreativitas: ekonomi, budaya, sim- bolik dan sosial. Penelitian ini adalah upaya untuk memahami kreativitas sebagai bagian dari ranah khusus sosial-budaya, yaitu ‘ranah kreativitas’. Dengan menggunakan metode etnografi, penelitian ini adalah upaya untuk menganalisis relasi antara ide-ide kreatif dan konteks sosial-budaya di mana ide-ide itu diproduksi. Melalui penelitian lapangan yang intensif terhadap komunitas kreatif lokal, penelitian ini menyimpulkan, bahwa produksi ide-ide kreatif sangat ditentukan oleh kelengkapan sub-sub ranah yang membangun ranah kreatif: ekspresi, produksi, diseminasi dan apresiasi. Berdasarkan ranah-ranah kreatif ini, tiga model sistem inovasi dapat diajukan: sistem terbuka, sistem liminal dan sistem tertu- tup.   Kata kunci: ide kreatif, ranah, inovasi, modal

  7. RADIKALISME DI INDONESIA: Antara Historisitas dan Antropisitas

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    Ahmad Asrori

    2017-02-01

    Full Text Available Studi ini mencoba menganalisis faktor-faktor yang mendorong munculnya radikalisme di Indonesia. Berdasarkan hasil penelitian ditemukan sekurang-kurangnya ada 3 faktor, yakni pertama, perkembangan di tingkat global, Kedua, penyebaran paham Wahabisme dan yang ketiga adalah kemiskinan. Situasi yang kacau di negara-negara Timur Tengah khususnya di Afghanistan, Palestina, Irak, Yaman, Mesir, Syiria, dan Turki, dipandang oleh kelompok-radikal sebagai akibat dari campur tangan Amerika, Israel, dan sekutunya. Pada saat yang sama, Masuknya faham Wahabisme yang mengagungkan budaya Islam ala Arab yang konservatif ke Indonesia telah ikut mendorong timbulnya kelompok eksklusif yang sering menuduh orang lain yang berada di luar kelompok mereka sebagai musuh, kafir dan boleh diperangi. Faktor ketiga adalah kemiskinan. Meski faktor ini tidak secara langsung berpengaruh terhadap merebaknya aksi radikalisme, namun perasaan sebagai elemen masyarakat yang termarjinalkan dapat menjadi faktor pendorong bagi seseorang untuk terjebak dalam proganda radikalisme.

  8. Kedudukan Musyawarah dan Demokrasi di Indonesia

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    Muhammad Hanafi

    2016-04-01

    Full Text Available Abstrak: Kedudukan Musyawarah dan Demokrasi di Indonesia. Negara Kesatuan Republik Indonesia (NKRI berdasarkan lintasan sejarah perjuangan, memiliki konstruksi kenegaraan satu-satunya di dunia yang bangsa terlahir dahulu, kemudian baru membentuk negara. Presiden pertama Republik Indonesia Ir. Soekarno menegaskan, bahwa Negara Kesatuan ialah Negara Kebangsaan. Tujuan Bangsa Indonesia terlahir, merdeka, dan membentuk negara memiliki satu cita-cita, Kehendak Untuk Mengangkat Harkat dan Martabat Hidup Rakyat Indonesia (Kedaulatan Rakyat Indonesia. Melalui analisis atas realitas kehidupan saat ini, Bangsa Indonesia telah hidup pada kondisi tatanan kehidupan seolah-olah sama dengan Negara Demokrasi, ialah negara dulu terbentuk baru bangsanya dilahirkan kemudian. Sehingga kedaulatan rakyat Indonesia yang berdasarkan prinsip musyawara-mufakat dan perwakilan belum mampu terealisasi. Sementara pelaksanaan demokrasi voting yang memiliki dasar liberalisme terus bergulir, sehingga kehidupan bangsa Indonesia semakin jauh dari cita-cita awal. DOI: 10.15408/jch.v1i2.2657

  9. DESAIN KOMUNIKASI VISUAL DAN PERILAKU KONSUMEN

    Directory of Open Access Journals (Sweden)

    Bagus Limandoko

    2000-01-01

    Full Text Available The word design is a word with different meanings. In the visual communication context it has became part of the team in the communication industry - the world of advertising%2C magazine and newspaper publishing%2C marketing and public relations%2C and%2C indeed%2C it has became one of the influential aspects to shape the behavior of a society and its economic development. Abstract in Bahasa Indonesia : Desain merupakan sebuah kata dengan banyak makna. Dalam konteks komunikasi visual%2C desain sudah menjadi bagian dari tim dalam industri komunikasi. Dunia advertising%2C publikasi majalah dan suratkabar%2C pemasaran dan public relations%2C dan yang pasti desain juga sudah menjadi salah satu aspek yang berpengaruh dalam membentuk perilaku suatu masyarakat dan perkembangan ekonominya. design%2C designer%2C visual communication design%2C behavior%2C consumer

  10. Determination of local constitutive properties of titanium alloy matrix in boron-modified titanium alloys using spherical indentation

    International Nuclear Information System (INIS)

    Sreeranganathan, A.; Gokhale, A.; Tamirisakandala, S.

    2008-01-01

    The constitutive properties of the titanium alloy matrix in boron-modified titanium alloys are different from those of the corresponding unreinforced alloy due to the microstructural changes resulting from the addition of boron. Experimental and finite-element analyses of spherical indentation with a large penetration depth to indenter radius ratio are used to compute the local constitutive properties of the matrix alloy. The results are compared with that of the corresponding alloy without boron, processed in the same manner

  11. PERMASALAHAN DAN POTENSI PESISIR DI KABUPATEN SAMPANG

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    Aries Dwi Siswanto

    2016-03-01

    Full Text Available SAMPANG’S COASTAL PROBLEMS AND POTENTIALS One area that has progressive economic value and environmental degradation possibility is a dynamic areas of coastal areas. These characteristics is interesting in the perspective of management and utilization of marine resources and fisheries. The rapid development of the Sampang regency required the government to focus and provide greater attention to minimize the ecological pressures that affect the carrying capacity of the environment, particularly in coastal areas. This study aims to gather information about the problem and the potential that exists in coastal areas of Sampang. Data taken by interviewing respondents lived in coastal communities during April 2015 and the results of the questionnaire were analyzed descriptively. The problems identified include land requirement, the overlapping use, the threat of pollution and environmental degradation, and zoning; whereas the potential that exists include salt, marine tourism, mariculture, and the development of industrial areas and ports. The potential problems identified in coastal areas and beaches in Sampang relatively identical to the Bangkalan. It needs a comprehensive solution to minimize the existing impact as well as efforts to optimize utilization to achieve integrated coastal zone management.Keywords: coastal, CZM, problem, potential, Sampang ABSTRAKSalah satu wilayah yang memiliki nilai ekonomi progresif sekaligus peluang degradasi lingkungan sehingga disebut daerah dinamis adalah wilayah pantai dan pesisir. Karakteristik ini menjadi sesuatu yang menarik dalam perspektif pengelolaan dan pemanfaatan sumberdaya kelautan dan perikanan. Pesatnya perkembangan tersebut menuntut pemerintah kabupaten Sampang untuk focus dan memberikan perhatian lebih besar sebagai upaya untuk meminimalkan tekanan ekologis yang berpengaruh terhadap daya dukung lingkungan, khususnya di wilayah pesisir. Penelitian ini bertujuan untuk mengumpulkan informasi

  12. KEPRIBADIAN SISWA DAN DISIPLIN BELAJAR SEBAGAI INTERVENING PENGARUH LINGKUNGAN KELUARGA DAN LINGKUNGAN SEKOLAH TERHADAP HASIL BELAJAR

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    Ajeng Febriyani

    2016-11-01

    Full Text Available Tujuan penelitian ini untuk menganalisis pengaruh langsung lingkungan keluarga dan lingkungan sekolah terhadap hasil belajar ekonomi maupun pengaruh tidak langsung melalui kepribadian siswa dan disiplin belajar. Populasi penelitian adalah seluruh siswa kelas XI IPS SMA Muhammadiyah sejumlah 152 siswa. Sampel yang diambil menggunakan rumus Slovin sebanyak 110 siswa. Metode pengumpulan data menggunakan angket dan dokumentasi. Metode analisis data adalah analisis deskriptif, analisis jalur, dan sobel test. Hasil penelitian menunjukkan bahwa (1 terdapat pengaruh positif dan signifikan lingkungan keluarga, lingkungan sekolah, kepribadian siswa serta disiplin belajar terhadap hasil belajar ekonomi, (2 terdapat pengaruh positif dan signifikan lingkungan keluarga dan lingkungan sekolah terhadap kepribadian siswa, (3 terdapat pengaruh positif dan signifikan lingkungan keluarga, lingkungan sekolah dan kepribadian siswa terhadap disiplin belajar, (4 kepribadian siswa secara signifikan memediasi pengaruh lingkungan keluarga dan lingkungan sekolah terhadap hasil belajar ekonomi, (5 disiplin belajar secara signifikan memediasi pengaruh lingkungan keluarga, lingkungan sekolah dan kepribadian siswa terhadap hasil belajar ekonomi. Berdasarkan hasil penelitian dapat disimpulkan bahwa kepribadian siswa dan disiplin belajar memediasi pengaruh lingkungan keluarga dan lingkungan sekolah terhadap hasil belajar ekonom. Saran yang dapat diberikan adalah pihak keluarga dan pihak sekolah mampu melakukan perbaikan kualitas lingkungan keluarga dan lingkungan sekolah untuk meningkatkan hasil belajar ekonomi. The purposes of this study were to analyze the direct effect of family and school environment for towards economics study result or or indirect effect through students’ personality and study discipline. The population in this research is The research \\ XI social grade in SMA Muhammadiyah Wonosobo with a total of 152 students. It used 110 students as the sample by

  13. Hubungan Antara Pengetahuan, Sikap, dan Perilaku Karyawan dengan Penerapan Manajemen Budaya Keselamatan dan Kesehatan Kerja

    Directory of Open Access Journals (Sweden)

    Endang Purnawati Rahayu

    2015-05-01

    Full Text Available Budaya K3 dipengaruhi oleh organisasi, individu, dan lingkungan kerja. Tujuan penelitian ini menganalisis hubungan pengetahuan, sikap dan perilaku karyawan dengan penerapan Budaya Keselamatan Dan Kesehatan (K3 di Bagian Produksi PT. Mustika Ratu. Penelitian ini menggunakan pendekatan kuantitatif jumlah sampel sebanyak 170 orang yang diambil secara simple random sampling. Hasil penelitian:  85,9% responden memiliki pengetahuan yang baik mengenai penerapan manajemen budaya K3, 80.6% bersikap baik dan 84.7% berperilaku baik pada penerapan budaya K3.  Penerapan manajemen budaya K3 memberikan hasil baik : 89,4 % sudah menerapkan manejemen budaya K3. Mengenai hubungan pengetahuan, sikap dan perilaku terhadap penerapan manajemen budaya K3, sub variabel yang diteliti memberikan hasil yang sama yaitu adanya hubungan yang bermakna. Hubungan pengetahuan terhadap penerapan manajemen budaya K3 (pValue < 0,001 dan Odd Ratio 9,133 (95% CI=3,143-26,539. Hubungan  sikap terhadap penerapan manajemen budaya K3 (Pvalue < 0,001 dan Odd Ratio= 9,286 (95% CI = 3,250 - 26,531, sedangkan hubungan perilaku terhadap penerapan manajemen budaya K3 (p value < 0,001 dan Odd Ratio=  5,956 (95% CI = 2,080 - 17,051. Temuan lainnya adalah tidak ada hubungan yang bermakna antara karakteristik responden dengan penerapan budaya K3. Saran: pihak manajemen harus melakukan monitoring dan harus memiliki komunikasi yang baik dengan karyawan, melatih dan melibatkan karyawan untuk meningkatkan upaya perusahaan pada pelaksanaan K3 dengan penerapan OSHAS 18001 sesuai Undang-Undang Nomor 1 Tahun 1970 dan PP (peraturan pemerintah nomor 50 pada tahun 2012.

  14. Komposisi Kimia, Kadar Albumin Dan Bioaktivitas Ekstrak Protein Ikan Gabus (Channa Striata Alam Dan Hasil Budidaya

    Directory of Open Access Journals (Sweden)

    Ekowati Chasanah

    2015-12-01

    Full Text Available Khasiat kesehatan ikan gabus (C. striata telah dikenal secara luas dan saat ini C. striata telah digunakan sebagai bahan baku industri produk suplemen. Tingginya permintaan akan produk suplemen tersebut menimbulkan masalah pada ketersediaan C. striata yang sebagian besar ditangkap dari sungai dan danau sebagai tempat hidupnya. Ikan gabus budidaya dipercaya memiliki kualitas tidak sebaik ikan gabus alam.Tujuan penelitian ini adalah untuk mendapatkan informasi mengenai komposisi kimia, termasuk albumin dan potensi ekstrak protein kasar ikan gabus alam dan hasil budidaya sebagai antioksidan dan anti hipertensi. Hasil analisis menunjukkan bahwa ikan gabus alam dan hasil budidaya memiliki kadar protein yang tidak berbeda secara nyata, tetapi berbeda pada kadar air, abu, dan lemak. Ikan gabus alam memiliki kadar lemak dan abu lebih rendah tetapi kadar air lebih tinggi dibanding ikan gabus budidaya. Ikan dari kedua sumber memiliki bagian yang dapat dimakan atau edible portion (EP sebesar 36%,dengan kadar mineral makro (Na, K, Ca dan mikro (Zn, Fe pada ikan hasil budidaya lebih tinggi dibanding kedua kelompok mineral pada ikan gabus alam. Kadar albumin ikan gabus alam lebih tinggi daripada kadar albumin ikan gabus budidaya. Namun demikian, hasil analisis asam amino menunjukkan bahwa ikan gabus hasil budidaya memiliki kuantitas asam amino yang lebih tinggi daripada ikan gabus alam. Asam amino non essensial dominan adalah alanin, asam aspartat, glisin, alloisoleusin, prolin, dan glutamin, sedangkan asam amino esensial didominasi oleh leusin, lisin, dan fenilalanin. Kedua ikan gabus yang diperoleh dari tempat yang berbeda tersebut memiliki bioaktivitas sebagai antioksidan yang lemah, namun berpotensi sebagai antihipertensi (penghambat Angiotensin Converting Enzyme (ACE dengan kekuatan 1/10 kekuatan kontrol obat hipertensi captopril.

  15. Komposisi Kimia, Kadar Albumin dan Bioaktivitas Ekstrak Protein Ikan Gabus (Channa striata Alam dan Hasil Budidaya

    Directory of Open Access Journals (Sweden)

    Ekowati Chasanah

    2015-12-01

    Full Text Available Khasiat kesehatan ikan gabus (C. striata telah dikenal secara luas dan saat ini C. striata telah digunakan sebagai bahan baku industri produk suplemen. Tingginya permintaan akan produk suplemen tersebut menimbulkan masalah pada ketersediaan C. striata yang sebagian besar ditangkap dari sungai dan danau sebagai tempat hidupnya. Ikan gabus budidaya dipercaya memiliki kualitas tidak sebaik ikan gabus alam.Tujuan penelitian ini adalah untuk mendapatkan informasi mengenai komposisi kimia, termasuk albumin dan potensi ekstrak protein kasar ikan gabus alam dan hasil budidaya sebagai antioksidan dan anti hipertensi. Hasil analisis menunjukkan bahwa ikan gabus alam dan hasil budidaya memiliki kadar protein yang tidak berbeda secara nyata, tetapi berbeda pada kadar air, abu, dan lemak. Ikan gabus alam memiliki kadar lemak dan abu lebih rendah tetapi kadar air lebih tinggi dibanding ikan gabus budidaya. Ikan dari kedua sumber memiliki bagian yang dapat dimakan atau edible portion (EP sebesar 36%,dengan kadar mineral makro (Na, K, Ca dan mikro (Zn, Fe pada ikan hasil budidaya lebih tinggi dibanding kedua kelompok mineral pada ikan gabus alam. Kadar albumin ikan gabus alam lebih tinggi daripada kadar albumin ikan gabus budidaya. Namun demikian, hasil analisis asam amino menunjukkan bahwa ikan gabus hasil budidaya memiliki kuantitas asam amino yang lebih tinggi daripada ikan gabus alam. Asam amino non essensial dominan adalah alanin, asam aspartat, glisin, alloisoleusin, prolin, dan glutamin, sedangkan asam amino esensial didominasi oleh leusin, lisin, dan fenilalanin. Kedua ikan gabus yang diperoleh dari tempat yang berbeda tersebut memiliki bioaktivitas sebagai antioksidan yang lemah, namun berpotensi sebagai antihipertensi (penghambat Angiotensin Converting Enzyme (ACE dengan kekuatan 1/10 kekuatan kontrol obat hipertensi captopril.

  16. Berpikir Rasional-Ilmiah dan Pendekatan Interdisipliner dan Multidisipliner dalam Studi Hukum Keluarga Islam

    Directory of Open Access Journals (Sweden)

    Khoiruddin Nasution

    2017-12-01

    Full Text Available This short article tries to explain how important it is to think rationally and scientifically, place the position of approachment in the Study of Islamic Family Law, also describe the use of Interdisciplinary and multidisciplinary approach to understand and practice the Islamic Family Law. In conclusion, there are three conclutions. First, students need to get used to think, write, speak and act rationallly and scientifically. The process can be carried out by integrating with the entire subjecy. Second,  needs a good and comprehensive understanding of approachment positions in the study of Islamic Family Law, both in relation to habituation of thinking, writing, speaking and acting rational and scientific as well as in effort to integrate and interconnect Islam and science. Third, it is necessary to habituate using an interdisciplinary and multidisciplinary approach to understand and observe all matters  that related to the Islamic Family Law.   [Tulisan singkat ini mencoba menjelaskan bagaimana pentingnya berpikir rasional dan ilmiah, meletakkan dimana posisi pendekatan dalam Studi Hukum Keluarga Islam, sekaligus menggambarkan penggunaan Pendekatan Interdisipliner dan Multidisipliner dalam memahami dan mengamalkan Hukum Keluarga Islam. Kesimpulannya ada tiga. Pertama, mahasiswa perlu dibiasakan berpikir, menulis, berbicara dan bentindak rasional dan ilmiah. Proses pembiasaannya dapat dilakukan secara terintegrasi dengan seluruh mata kuliah. Kedua, perlu pemahaman yang baik dan konprehensif bagaimana posisi pendekatan dalam studi Hukum Keluarga Islam, baik dalam kaitannya dengan pembiasaan berpikir, menulis, berbicara dan bentindak rasional dan ilmiah maupun dalam upaya integrasi dan/atau interkoneksi keilmuan. Ketiga, perlu pembiasaan menggunakan pendekatan interdisipliner dan multidisipliner dalam memahami dan mengamalkan segala persoalan yang berkaitan dengan Hukum Keluarga Islam.

  17. By Product Ternak Teknologi dan Aplikasinya

    OpenAIRE

    Said, Muhammad Irfan

    2015-01-01

    DAFTAR PUSTAKA Adventini, N., Muhayatun, D. D. Lestiani dan W.Y.N. Syahfitri. 2012. Analisis Mikronutrien dalam Daging, Limpa, dan Hati Sapi. Jurnal Medika. 38 (8), 580???586. Angelidaki, I., and B. K. Ahring. 2000. Methods for increasing the biogas potential from the recalcitrant organic matter contained in manure. Water Science Technology. 41 (3), 189-194. Anonim. 1974. Gelita-Instant-Gelatins Type 800 A Type 800 B. Gelatine-Information-Service. Deutsche Gelatine-Febrike...

  18. Diapers Bagi Kesehatan Bayi dan Lingkungan

    OpenAIRE

    Noriko, Nita

    2013-01-01

    Bayi yang berusia 0 sampai hingga 1 tahun termasuk golongan rentan, karena memiliki sistem kekebalan tubuh yang belum sempurna. Kekebalan tubuh yang dimiliki bayi adalah kekebalan pasif . Terpaparnya bayi terhadap antigen dapat terjadi melalui udara, air, makanan maupun perlengkapan yang digunakan seperti alas perlindungan (diapers) terhadap enupresis dan enkopresis. Diapers dikenal di Indonesia sejak tahun 1980 karena penggunaannya yang praktis dan mudah Penggunaan diapers menimbulkan ...

  19. Peut-on voyager dans le temps ?

    CERN Multimedia

    CERN. Geneva

    2008-01-01

    La possibilité de voyager dans le temps est régulièrement évoquée par les magazines scientifiques (et parfois même par les scientifiques). Elle est également le sujet de nombreux romans de science-fiction. Nous discuterons d’abord du sens qu’on peut donner à l’expression « voyager dans le temps », puis nous expliciterons ce que la physique contemporaine dit à ce propos.

  20. Bahasa Bali dan Pemertahanan Kearifan Lokal

    OpenAIRE

    Suardiana, I Wayan

    2012-01-01

    Bahasa Bali sebagai salah satu bahasa dan perekam budaya Bali sangat penting untuk dipelihara. Pemeliharaan bahasa Bali juga diharapkan untuk mempertahankan taksu Bali. Di Bali ada tingkatan(anggah-ungguhin basa) berbahasa yang menyebabkan terdapatnya klasifikasi sosial dalam masyarakat Bali. Kemampuan seseorang dalam menggunakan bahasa Bali memperlihatkan kedudukan sosial dan etika orang tersebut dalam berbahasa. Kemudian muncul pertanyaan ketika orang Bali berbicara dalam bahasa Bali tanp...

  1. Corak Etnik dan Dinamika Batik Pekalongan

    OpenAIRE

    Irfa'ina Rohana Salma

    2016-01-01

    ABSTRAKBatik Pekalongan mempunyai ciri khas atau karakter yang berbeda dengan batik dari daerah pesisir lainnya. Corak yang berbeda ini karena adanya pengaruh budaya dari etnis-etnis pembuat batik yang berdomisili di Pekalongan, yaitu etnis Jawa, etnis Cina dan etnis Belanda. Tulisan ini bertujuan untuk melakukan tinjauan dan mengkritisi lebih dalam ciri khas atau karakter corak dari batik yang dihasilkan para pembatik dari etnis yang berbeda di Pekalongan. Metode pendekatan yang dipakai yait...

  2. Strategi Pembelajaran Biologi Berbasis Kompetensi dan Konservasi

    Directory of Open Access Journals (Sweden)

    Saiful Ridlo

    2013-09-01

    Full Text Available AbstrakPembelajaran melibatkan interaksi dosen, mahasiswa, dan sumber belajar. Interaksi antara ketiganya membutuhkan strategi pembelajaran. Penelitian ini bertujuan menghasilkan strategi pembelajaran biologi di Jurusan Biologi Unnes yang telah berkomitmen mengaplikasikan kurikulum berbasis kompetensi dan konservasi dengan ciri pendekatan jelajah alam sekitar (JAS. Metodologi penelitian menggunakan pendekatan kualitatif. Informannya dosen dan mahasiswa yang mengajar dan belajar biologi umum, mikrobiologi, dan taksonomi hewan. Data yang diperoleh berupa deskripsi kegiatan belajar mengajar dan lesson study.  Data-data dianalisis kemudian dinarasikan. Hasil penelitian menunjukkan pembelajaran biologi dengan pendekatan berpusat pada siswa yang dikhususkan pada kegiatan penjelajahan alam sekitar dapat dilakukan menggunakan strategi yang berbasis pada cara belajar siswa aktif dan kooperatif. Strategi-strategi tersebut adalah pembelajaran kontekstual, pembelajaran partisipatif, dan pembelajaran inkuiri. AbstractLearning involves the interaction of lecturer, students, and learning resources. The interaction between them requires a learning strategy. This research aims to generate learning strategies of biology in the Department of Biology Unnes which has committed to apply the competence- and conservation-based curriculum of features the environmental exploration (JAS approach. The research methodology uses a qualitative approach. The informants are the faculty members and the students who, respectively, teach and learn biology, microbiology, and animal taxonomy subjects. The data obtained were in the form of description of learning activities and lesson studies. The data were then analyzed narratively. The results showed that the student-centered learning of environmental exploration may be conducted using active- and cooperative-based strategies. Examples of these strategies are contextual learning, participatory learning, and inquiry learning.

  3. KONSTRUKSI GENDER, HEGEMONI KEKUASAAN, DAN LEMBAGA PENDIDIKAN

    OpenAIRE

    Marhumah Marhumah

    2012-01-01

    AbstrakIsu gender adalah bagian dari persoalan sosial kemasyarakatan di Indonesia, yang persoalan utamanya  adalah kesenjangan mencolok antara laki-laki dan perempuan. Selama ini, sosialisasi gender adalah dengan cara mengedarkan pesan-pesan, wacana, nilai-nilai, norma-norma, kepercayaan dan model-model yang merepresentasikan kontruksi gender tertentu, yang dalam konsep Foucault sebagai diskursus (discourse). Dengan konsep wacana tersebut, sosialisasi gender mengandaikan adanya relasi pengeta...

  4. Desain Premi dan Manfaat Asuransi Deposito

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    Said Kelana Asnawi

    2009-05-01

    Full Text Available Paper ini memuat desain penentuan premi asuransi deposito dengan mempertimbangkan pinalti bagi perilaku moral hazard dan memberikan sanggahan teoritis terhadap pendapat yang meragukan kebaikan asuransi deposito. Sanggahan ini didasarkan pada desain premi jika mempertimbangkan pinalti bagi perilaku moral hazard. Sanggahan ini merujuk pada manfaat asuransi berupa penurunan penarikan serta laba bank yang positip dan manfaat sosial yang diperoleh pemerintah. Key Word: asuransi deposito, incentive compatible plan, moral hazard, camel rating, Option Theory-Jump Process, Benefit Sosial Pemerintah

  5. PRINSIP DAN KRITERIA PERIKLANAN DARI PERSPEKTIF ISLAM

    Directory of Open Access Journals (Sweden)

    Teuku Meldi Kesuma

    2012-06-01

    Full Text Available Advertising in marketing Islamic products must be believed and understood as an important part of marketing based on Islam which should not be separated. This paper examines the principles and criteria of the advertising in the perspective of Islam. It is caused by the increasing of the companies and institutions which are based on Islamic values such as Islamic financial institutions that promote its products the consumers. The important issues discussed in this paper is how the real of concepts, principles, and criteria of Islamic advertising? Therefore this paper is developing an advertising concept from the perspective of Islam and to know for sure whether the principles and criteria that should exist in advertising Islam. The methodology applied in this paper is through literature review by using content analysis. Hopefully, this study could develop an Islamic perspective advertisement concept in terms of principles and criteria. =========================================== Periklanan dalam memasarkan produk-produk Islam harus diyakini dan di pahami merupakan bahagian penting dalam pemasaran yang berdasarkan Islam yang tidak boleh dipisahkan. Tulisan ini mengkaji prinsip-prinsip dan kriteria periklanan dalam perspektif Islam. Hal ini disebabkan semakin ramai dan tingginya pertumbuhan perusahaan dan institusi yang berlandaskan nilai-nilai Islam seperti institusi keuangan Islam yang mempromosikan produk dan perkhidmatannya kepada orang ramai. Persoalan penting yang dibahas dalam kertas kerja ini adalah bagaimanakah bentuk konsep, prinsip dan kriteria periklanan Islam yang sebenarnya? Oleh karena itu tujuan kertas kerja ini adalah untuk membangun satu konsep periklanan dari perspektif Islam dan untuk mengenal pasti apakah prinsip-prinsip serta kriteria yang seharusnya ada dalam periklanan Islam. Metodologi kajian yang digunakan dalam kertas kerja ini adalah metode kepustakaan dengan menggunakan analisis isi. Kajian ini diharapkan dapat

  6. Entrer dans les squats ouverts

    OpenAIRE

    2015-01-01

    Au cœur des métropoles françaises émergent ici et là des squats, lieux d’habitation et de création affranchis, tournés vers la ville et ses habitants. Vivre en squat constitue un mode de vie, un choix subversif, une forme de résistance au système, autant qu’un recours face aux difficultés sociales. Ce livre nous plonge dans les squats « ouverts » et saisit, par la sociologie, le quotidien de ces populations mouvantes et fortement hétérogènes. Il répond à des questions simples. Qui sont ces sq...

  7. INTERRELASI BAHASA, MATEMATIKA DAN STATISTIKA

    Directory of Open Access Journals (Sweden)

    Rofiatul Andawiyah

    2014-11-01

    Full Text Available Tulisan ini berupaya mengungkap keterkaitan antara bahasa, matematika, serta statistika dimana dalam konsep berpikir ilmiah bahasa menjadi core dalam praktik keduanya baik matematika maupun statistika. Terlebih bahasa menjadi sesuatu yang amat penting untuk membahasakan matematika serta statistika itu sendiri selanjutnya Matematika merupakan bahasa yang melambangkan serangkaian makna dari pernyataan yang ingin kita sampaikan. Matematika memberikan kemudahan kepada kita di dalam memberi simbol akan makna sesuatu. Sehingga apa yang sulit menjadi mudah dipahami. Sementara statistika pengembangan lebih lanjut dari matematika. Penggunaan statistika dalam kehidupan dewasa ini sangat membantu untuk melakukan penarikan kesimpulan dari permasalahan yang dihadapi atau untuk merencanakan masa depan yang baik. Peradaban yang dibangun manusia, disebabkan dia mampu melakukan penalaran. Penalaran menggunakan kecakapan penggunaan bahasa, matematika dan statistika sebagai pembantu mengambil kesimpulan.

  8. Agir dans l'espace

    OpenAIRE

    Albert, Frédéric; Allain, Sonia; Amalberti, René; Anderson, David I.; Aurnague, Michel; Baccino, Thierry; Baratgin, Jean; Barbu-Roth, Marianne; Beaudouin-Lafon, Michel; Beauvillain, Cécile; Berthoz, Alain; Beugnon, Guy; Bui, Marc; Bullier, Jean; Bullot, Nicolas J.

    2017-01-01

    Le traitement cognitif de l'espace par un être vivant se décompose en différentes phases : il perçoit l'espace – ce qui implique certains mécanismes de catégorisation et d'abstraction –, se le représente, conserve en mémoire cette représentation qu'il peut rappeler et utiliser pour conduire des actions adaptées et interagir de façon optimale avec l'environnement. Ce traitement ainsi défini a déjà fait l'objet d'un grand nombre de travaux dans le domaine des sciences de la vie et de la psychol...

  9. Comparative in vitro biocompatibility of nickel-titanium, pure nickel, pure titanium, and stainless steel: genotoxicity and atomic absorption evaluation.

    Science.gov (United States)

    Assad, M; Lemieux, N; Rivard, C H; Yahia, L H

    1999-01-01

    The genotoxicity level of nickel-titanium (NiTi) was compared to that of its pure constituents, pure nickel (Ni) and pure titanium (Ti) powders, and also to 316L stainless steel (316L SS) as clinical reference material. In order to do so, a dynamic in vitro semiphysiological extraction was performed with all metals using agitation and ISO requirements. Peripheral blood lymphocytes were then cultured in the presence of all material extracts, and their comparative genotoxicity levels were assessed using electron microscopy-in situ end-labeling (EM-ISEL) coupled to immunogold staining. Cellular chromatin exposition to pure Ni and 316L SS demonstrated a significantly stronger gold binding than exposition to NiTi, pure Ti, or the untreated control. In parallel, graphite furnace atomic absorption spectrophotometry (AAS) was also performed on all extraction media. The release of Ni atoms took the following decreasing distribution for the different resulting semiphysiological solutions: pure Ni, 316L SS, NiTi, Ti, and controls. Ti elements were detected after elution of pure titanium only. Both pure titanium and nickel-titanium specimens obtained a relative in vitro biocompatibility. Therefore, this quantitative in vitro study provides optimistic results for the eventual use of nickel-titanium alloys as surgical implant materials.

  10. PENGATURAN SISTEM PENGAMAN RUMAH DAN PENGATURAN BEBAN LAMPU BERBASIS MIKROKONTROLER

    Directory of Open Access Journals (Sweden)

    Joko Firmansyah

    2015-09-01

    Penelitian ini menghasilkan suatu instrumen pengaman rumah dan pengaturan beban lampu yang memiliki menu open dan menu Set RTC sebagai menu pengatur sistem. Menu Open digunakan untuk mengatur akses pintu maupun lampu seperti saklar on/ off, sedangkan Menu Set RTC dapat digunakan untuk mengatur akses pintu maupun lampu sesuai keinginan pengguna dengan cara menseting nilai start dan nilai stop. Akses yang dapat diatur adalah akses pintu dan lampu dengan mode 24 jam. Pengaturan pada sistem ini belum dilengkapi dengan setting berdasarkan tanggal dan hari. Memori flash yang dibutuhkan untuk membentuk instrumen ini adalah 99,1% dari 16KByte dan memori eeprom sebesar 8,6% dari 512Byte

  11. Cadmium Telluride-Titanium Dioxide Nanocomposite for Photodegradation of Organic Substance.

    Science.gov (United States)

    Ontam, Areeporn; Khaorapapong, Nithima; Ogawa, Makoto

    2015-12-01

    Cadmium telluride-titanium dioxide nanocomposite was prepared by hydrothermal reaction of sol-gel derived titanium dioxide and organically modified cadmium telluride. The crystallinity of titanium dioxide in the nanocomposite was higher than that of pure titanium dioxide obtained by the reaction under the same temperature and pressure conditions, showing that cadmium telluride induced the crystallization of titanium dioxide. Diffuse reflectance spectrum of the nanocomposite showed the higher absorption efficiency in the UV-visible region due to band-gap excitation of titanium dioxide. The nanocomposite significantly showed the improvement of photocatalytic activity for 4-chlorophenol with UV light.

  12. DIALEKTIKA RADIKALISME DAN ANTI RADIKALISME DI PESANTREN

    Directory of Open Access Journals (Sweden)

    Thohir Yuli Kusmanto

    2015-06-01

    Upaya menentang segala bentuk radikalisme merupakan bagian dari reaksi anti radikalisme. Semangat anti radikalisme muncul sebagai bagian dari resistensi masyarakat. Radikalisme dan anti radikalisme saling berkaitan secara dialektis. Meski­pun keduanya merupakan sesuatu yang paradoks, namun selalu menyatu. Dialektika radikalisme dan anti radikalisme menarik ketika dilihat dalam kehidupan pesantren. Fenomena radikalisme Islam seringkali dihubungkan dengan masya­ra­kat pesantren di Indonesia. Beberapa kelompok masyarakat memahami radikal­isme tumbuh dari pesantren. Pandangan tersebut didasari oleh banyaknya pelaku radikalisme Islam dalam bentuk kekerasan alumni pesantren. Realitas tersebut bisa jadi benar dalam kasus tertentu, tetapi tidak bisa digeneralisasi. Penelitian ini ber­upaya menggali data pandangan pesantren tentang wacana dan praksis radikalisme dan anti radikalisme serta pola resistensinya. Hasil penelitian menunjukkan bahwa masyarakat pesantren menolak, menentang dan aktif membangun spirit anti radikalisme yang diwujud­kan dalam beberapa pola. Temuan penelitian tersebut merupakan sintesis dari tesis yang selama ini menjadi wacana masyarakat tentang radikalisme dan pesantren.

  13. Formation of titanium diboride coatings during the anodic polarization of titanium in a chloride melt with a low boron oxide content

    Science.gov (United States)

    Elshina, L. A.; Malkov, V. B.; Molchanova, N. G.

    2015-02-01

    The corrosion-electrochemical behavior of titanium in a molten eutectic mixture of cesium and sodium chlorides containing up to 1 wt % boron oxide is studied in the temperature range 810-870 K in an argon atmosphere. The potential, the current, and the rate of titanium corrosion are determined. The optimum conditions of forming a dense continuous titanium diboride coating on titanium with high adhesion to the metallic base are found for the anodic activation of titanium in the molten electrolyte under study.

  14. Titanium Dioxide Nanoparticles in Food and Personal Care Products

    Science.gov (United States)

    Weir, Alex; Westerhoff, Paul; Fabricius, Lars

    2012-01-01

    Titanium dioxide is a common additive in many food, personal care, and other consumer products used by people, which after use can enter the sewage system, and subsequently enter the environment as treated effluent discharged to surface waters or biosolids applied to agricultural land, incinerated wastes, or landfill solids. This study quantifies the amount of titanium in common food products, derives estimates of human exposure to dietary (nano-) TiO2, and discusses the impact of the nanoscale fraction of TiO2 entering the environment. The foods with the highest content of TiO2 included candies, sweets and chewing gums. Among personal care products, toothpastes and select sunscreens contained 1% to >10% titanium by weight. While some other crèmes contained titanium, despite being colored white, most shampoos, deodorants, and shaving creams contained the lowest levels of titanium (TiO2 (E171) suggests that approximately 36% of the particles are less than 100 nm in at least one dimension and that it readily disperses in water as fairly stable colloids. However, filtration of water solubilized consumer products and personal care products indicated that less than 5% of the titanium was able to pass through 0.45 or 0.7 μm pores. Two white paints contained 110 μg Ti/mg while three sealants (i.e., prime coat paint) contained less titanium (25 to 40 μg Ti/mg). This research showed that while many white-colored products contained titanium, it was not a prerequisite. Although several of these product classes contained low amounts of titanium, their widespread use and disposal down the drain and eventually to WWTPs deserves attention. A Monte Carlo human exposure analysis to TiO2 through foods identified children as having the highest exposures because TiO2 content of sweets is higher than other food products, and that a typical exposure for a US adult may be on the order of 1 mg Ti per kilogram body weight per day. Thus, because of the millions of tons of titanium based

  15. INTERVENSI KOGNITIF DAN PENDEKATAN RANTAI NILAI DALAM PENINGKATAN PEMANFAATAN TEKNOLOGI INFORMASI DAN KOMUNIKASI DI USAHA KECIL DAN MENENGAH DI BANDUNG

    Directory of Open Access Journals (Sweden)

    Ari Widyanti

    2016-06-01

    Full Text Available Pemanfaatan teknologi informasi dan komunikasi (TIK di usaha kecil dan menengah (UKM di Indonesia masih pada tingkat yang belum sesuai harapan. Mempertimbangkan bahwa UKM di Indonesia banyak menyerap tenaga kerja dan menyumbang pendapatan nasional yang cukup besar, serta melihat bahwa pemanfaatan TIK di banyak industri besar telah membawa peningkatan performansi yang cukup signifikan,  peningkatan pemanfaatan TIK di UKM merupakan hal yang penting untuk dilakukan. Penelitian ini dilakukan dengan tujuan untuk memetakan tingkat pemanfaatan TIK di UKM dan mengaplikasikan intervensi kognitif dan pendekatan rantai nilai dalam meningkatkan pemanfaatan TIK di UKM. Pemetaan pemanfaatan TIK dilakukan melalui survey dengan menggunakan kuesioner terstruktur dan wawancara yang melibatkan 61 UKM di berbagai bidang di Bandung. Hasil pemetaan pemanfaatan TIK di UKM menunjukkan bahwa pemanfaatan TIK di UKM sebatas pada tujuan pemasaran produk dan sebatas pada penggunaan website. Kendala utama pemanfaatan TIK di UKM adalah faktor SDM terutama berkaitan dengan keterbatasan pengetahuan dan informasi. Berdasarkan hasil pemetaan, selanjutnya, intervensi dilakukan melalui edukasi/kampanye dengan materi mengenai rantai nilai pada 30 UKM yang bergerak di bidang fashion. Hasil intervensi menunjukkan bahwa level pengetahuan dan intensi/kemauan untuk menerapkan TIK di UKM selain untuk kepentingan pemasaran (misalnya untuk perancangan produk dan hubungan dengan pemasok semakin meningkat. Implikasi dari hasil penelitian ini dibahas lebih lanjut.       Abstract The use of information and communication technology (ICT in small and medium enterprise (SME in Indonesia is at low level. Considering that SME in Indonesia employ a lot of people and contribute to Gross Domestic Product (GDP as well as improve performance of industries,  coupled with low level of ICT use in Indonesian SME, ICT’ used in SME must be increased. Therefore, this study aims to map the use of ICT in

  16. Osseointegration of titanium, titanium alloy and zirconia dental implants: current knowledge and open questions.

    Science.gov (United States)

    Bosshardt, Dieter D; Chappuis, Vivianne; Buser, Daniel

    2017-02-01

    Bone healing around dental implants follows the pattern and sequence of intramembraneous osteogenesis with formation of woven bone first of all followed later by formation of parallel-fibered and lamellar bone. Bone apposition onto the implant surface starts earlier in trabecular bone than in compact bone. While the first new bone may be found on the implant surface around 1 week after installation, bone remodeling starts at between 6 and 12 weeks and continues throughout life. Bone remodeling also involves the bone-implant interface, thus transiently exposing portions of the implant surface. Surface modifications creating micro-rough implant surfaces accelerate the osseointegration process of titanium implants, as demonstrated in numerous animal experiments. Sandblasting followed by acid-etching may currently be regarded as the gold standard technique to create micro-rough surfaces. Chemical surface modifications, resulting in higher hydrophilicity, further increase the speed of osseointegration of titanium and titanium-zirconium implants in both animals and humans. Surface modifications of zirconia and alumina-toughened zirconia implants also have an influence on the speed of osseointegration, and some implant types reach high bone-to-implant contact values in animals. Although often discussed independently of each other, surface characteristics, such as topography and chemistry, are virtually inseparable. Contemporary, well-documented implant systems with micro-rough implant surfaces, placed by properly trained and experienced clinicians, demonstrate high long-term survival rates. Nevertheless, implant failures do occur. A low percentage of implants are diagnosed with peri-implantitis after 10 years in function. In addition, a low number of implants seem to be lost for primarily reasons other than biofilm-induced infection. Patient factors, such as medications interfering with the immune system and bone cells, may be an element contributing to continuous bone

  17. 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...

  18. KONTRIBUSI HUMAN CAPITAL dan CUSTOMER CAPITAL DALAM MENGGAPAI KINERJA CAFÉ dan RESTO di SURABAYA

    Directory of Open Access Journals (Sweden)

    Gendut Sukarno

    2016-11-01

    Berdasarkan hasil pengolahan data diketemukan bahwa 1 human capital mampu memberikan kontribusi yang berarti terhadap customer capital. 2 Customer capital mampu memberikan kontribusi yang berarti terhadap kinerja café dan resto di Surabaya, 3 human capital mampu memberikan kontribusi yang berarti terhadap kinerja café dan resto di Surabaya.

  19. POTENSI TAMAN NASIONAL BOGANI NANI WARTABONE, PERMASALAHAN DAN KONSERVASI PADA TINGKAT PENGEMBANGAN DAN PENGAWASAN

    Directory of Open Access Journals (Sweden)

    Femmy Roosje Kawuwung

    2010-03-01

    Full Text Available Taman Nasional Bogani Nani Wartabone sebelumnya bernama Dumoga Bone. Nani Wartabone seorang pahlawan yang terkenal di daerah Gorontalo, untuk mengenang pahlawan tersebut maka namanya diabadikan pada nama Taman Nasional. Pada tahun 1982 luas 300.000 hektar dinyatakan Menteri Pertanian. Ditunjuk Menteri Kehutanan, SK No. 731/Kpts-II/1992 luas 287.115 hektar. Propinsi Gorontalo dengan ketinggian tempat 50 – 2.000 meter dpl. Posisi 1o– 4o LS, 120o – 124o BT. Permasalahan; terjadinya fragmentasi, perladangan berpindah, pertanian, illegal logging, pemukiman, pertambangan, dan pencurian spesies flora dan fauna. Tujuan mengetahui potensi Taman Nasional Bogani Nani Wartabone, permasalahan dan upaya konservasi.Potensi Taman Nasional Bogani Nani Wartabone adalah; Flora terdiri dari 400 jenis pohon, 241 jenis tumbuhan tinggi, 120 jenis efifit dan terdapat 24 jenis anggrek. Tumbuhan endemik yaitu; palem matayangan, kayu hitam dan bunga bangkai(Amophaphallus compamulatus. Tumbuhan yang umum adalah cempaka, kenanga, agates, dan tanaman hias.Taman Nasional Bogani Nani Wartabone memiliki 24 jenis mamalia, 64 jenis aves, 11 jenis reptile. Mamalia (satwa endemik : monyet hitam/yaki (Macaca nigra, Monyet Dumoga Bone, babirusa, kelelawar bone, kus-kus besar (Palanger ursinus, anoa kecil (B.quarlesi. Di Taman Nasional Bogani Nani Wartabone tercatat 200 – 225 jenis burung. Reptil : ular kobra, king kobra (N. hammah, ular belang, katak pohon (Rhacophorus monticola, ikan : ikan mas (Cyprinus carpio, bekicot (Achatina fulica. Upaya konservasi adalah pada tingkat pengembangan dan pengawasan. Dalam upaya konservasi harus ada kerja sama dari pemerintah dan masyarakat sekitar kawasan.

  20. Perancangan dan Implementasi Autonomous Landing Menggunakan Behavior-Based dan Fuzzy Controller pada Quadcopter

    Directory of Open Access Journals (Sweden)

    Fadjri Andika Permadi

    2012-09-01

    Full Text Available Perkembangan teknologi sistem kendali pesawat sayap berputar (copter semakin pesat salah satunya pada pesawat berbaling-baling empat (quadcopter. Landing merupakan bagian tersulit dalam penerbangan quadcopter. Ukuran quadcopter yang kecil mengakibatkan susahnya pengendalian kestabilan dan kecepatan turun.Cara mengatasi permasalahan ini adalah dengan autonomous landing yang menggunakan algoritma kendali behavior-based (berbasis perilaku. Tugas akhir ini merancang dan mengimplementasikan algoritma kendali behavior-based (berbasis perilaku pada proses autonomous landing quadcopter dan kontroler PD (Proporsional, Diferensial pada untuk  kestabilan sudut roll dan pitch, sedangkan untuk jarak landing menggunakan kontroler logika fuzzy. Pada Tugas Akhir ini, didapatkan nilai parameter kontroler PD roll dan kontroler PD pitch dari hasil tuning terstruktur pada simulasi Kp=500 dan Kd=30. Sedangkan kendali landing menggunakan kontroler logika fuzzy dengan parameter Ke=4 Kde=175 dan Ku=1 pada simulasi dapat melakukan proses landing selama 8 detik dari ketinggian 3 meter. Respon hasil implementasi pada quadcopter belum sesuai dengan hasil simulasi. Proses landing pada implementasi lebih cepat dengan waktu 3.5 detik dari ketinggian 2 meter, selain itu koreksi sudut roll dan sudut pitch masih terhadapat error +/-3º.

  1. Otomatisasi Pelayanan Binatu Berbasis Raspberry Pi Untuk Meningkatkan Efektivitas Dan Efisiensi Kegiatan Operasional Dan Pelayanan Binatu

    Directory of Open Access Journals (Sweden)

    Al Habsyi Yesa

    2017-01-01

    Full Text Available Bisnis binatu (laundry atau bisnis jasa cuci pakaian merupakan bisnis yang menggiurkan saat sekarang ini. Proses layanan binatu umumnya terdiri dari pendaftaran, pengolahan, dan pengambilan pakaian. Proses ini memiliki banyak kekurangan yaitu pendaftaran manual tidak efektif dan efisien, pengolahan pakaian hanya diketahui oleh penyedia layanan binatu, dan pelanggan tidak mengetahui pakaian telah selesai. Ditengah persaingan bisnis yang begitu ketat, pelayanan konsumen merupakan suatu hal yang sangat penting. Penyedia jasa dituntut untuk berinovasi untuk menyediakan layanan jasa yang efektif dan efisien. Oleh karena itu pada penelitian ini merancang dan merealisasikan otomatisasi pelayanan binatu berbasis raspberry pi. Sistem ini menggunakan timbangan digital berbasis load cell, teknologi radio frequency identification (RFID sebagai masukan data otomatis, Raspberry Pi sebagai pusat dari pengolahan basis data (database, dan webserver sebagai pusat informasi bagi pelanggan. Hasil penelitian menghasilkan beberapa kesimpulan. Timbangan digital memiliki eror rata-rata 0,88 %, metode RFID dapat memasukan data pelanggan secara otomatis dengan metode pengambilan nomor identitas jenis hex 8 digit, Raspberry Pi dapat mengakomodasi aplikasi yang efektif dan efisien untuk menyimpan data pelanggan secara otomatis dengan pemakaian CPU rata-rata 5%, dan webserver yang digunakan dapat menyediakan informasi layanan binatu bagi pelanggan.

  2. HARMONISASI, INTEGRASI DESA PAKRAMAN DENGAN DESA DINAS YANG MULTI ETNIK DAN MULTIAGAMA MENGHADAPI PERGESERAN, PELESTARIAN, DAN KONFLIK DI BALI

    Directory of Open Access Journals (Sweden)

    Dewa Bagus Sanjaya

    2014-02-01

    Full Text Available Penelitian etnografi ini bertujuan untuk menganalisis hubungan desa dinas dan desa pakraman, dan integrasi masyarakat di Provinsi Bali. Penelitian ini melibatkan prajuru desa pakraman, masyarakat Hindu, dan masyarakat non-Hindu. Penentuan subjek penelitian dengan menggunakan teknik puposive. Data dikumpulkan dengan wawancara, observasi dan pencatatan dokumen. Data dianalisis secara kualitatif. Hasil penelitian menunjukkan bahwa desa pakraman dan desa dinas berada dalam kondisi harmonis, sehingga memunculkan ungkapan “satu badan dua kepala”, sekaligus sebagai wujud integrasi masyarakat. Desa pakraman melaksanakan tugas di bidang agama, adat, dan budaya,sedangkan desa dinas di bidang administrasi.

  3. TANTANGAN INTERKONEKSI SAINS DAN AGAMA DI IAIN SUNAN AMPEL

    Directory of Open Access Journals (Sweden)

    Muhammad Fahmi

    2013-11-01

    Full Text Available Tulisan ini berusaha mengeksplorasi konsep interkoneksi keilmuan agama dan umum melalui integrated twin towers di IAIN Sunan Ampel beserta tantangan yag melingkupinya. Pengembangan epistemologi integrated twin towers yang berupaya menginterkoneksikan keilmuan agama dan umum dengan grand design yang sedang digodok oleh para petinggi IAIN Sunan Ampel baru sebatas asumsi, dan tetap rentan mengandung resiko dan penuh tantangan. Asumsinya adalah keilmuan agama dan umum yang integratif-interkonektif, dan resikonya adalah keilmuan agama dan umum yang semakin dikotomis dengan simbol menara kembar. Sementara itu tantangannya adalah ego SDM ilmu agama dan umum. Meskipun penuh resiko dan tantangan, namun upaya integrasi-interkoneksi keilmuan agama dan umum melalui epistemologi integrated twin towers perlu terus dilakukan. Asumsi keilmuan yang integratif-interkonektif melalui epistemologi integrated twin towers harus dikawal dengan perangkat sistem yang mendukung realisasinya. Apabila tidak melalui pengawalan sistem, yang terjadi bisa sebaliknya, bukan keilmuan yang integratif tetapi keilmuan yang semakin dikotomis antara agama dan umum, karena ada pelambangan berupa simbol menara kembar keilmuan, dimana keilmuan agama ada pada menara tersendiri dan keilmuan umum ada pada menara tersendiri. Bentuk pengawalan sistem yang ada bisa berupa seleksi penerimaan tenaga dosen atau karyawan yang mana dalam perekrutan harus dipastikan calon tenaga dosen atau karyawan adalah orang-orang yang mempunyai pemahaman keagamaan dan umum serta bidang yang akan digelutinya secara cukup. Jadi materi soal yang dijadikan acuan tes harus juga bersifat integratif.

  4. Hantaran Sinyal Leptin dan Obesitas: Hubungannya dengan Penyakit Kardiovaskuler

    Directory of Open Access Journals (Sweden)

    David Limanan

    2013-11-01

    Full Text Available Diperkirakan saat ini jumlah orang dengan obesitas melebihi 250 juta orang, yaitu 7% dari populasi orang dewasa di dunia. Mortalitas obesitas erat hubungannya dengan sindrom metabolik yang merupakan kelainan metabolik meliputi obesitas, resistensi insulin, gangguan toleransi glukosa, abnormalitas trigliserida dan hemostasis, disfungsi endotel dan hipertensi. Leptin dihasilkan adiposit dan merupakan anggota dari adipositokin; berperan dalam hantaran sinyal hormon jaringan adiposa. Kelainan leptin maupun reseptornyadapat menyebabkan seseorang mengalami obesitas, metabolik sindrom, diabetes dan penyakit kardiovaskuler. Kompleks leptin-reseptor mengaktifkan sistem transduksi sinyal, yang paling dominan adalah jalur janus kinase-signal transducer and activator of transcription-3 (JAK-STAT3, kemudian phospatidyl inositol 3- kinase (PI3K, mitogen-activated protein kinase (MAPK, 5’adenosine monophosphate-activated protein kinase (AMPK, dan mammalian target of rapamycin (mTOR. Jalur leptin-associated PI3K dengan ERK cascade berperan penting dalam proliferasi kardiomiosit dan melindungi jantung dari ischemia reperfusion injury. ERK1/2 mengaktifkan target gen seperti c-fos dan egr-1 yang berperan dalam proliferasi dan diferensiasi. Nuclear factor κB diduga sebagai target jalur p38 dan JNK MAPK. Faktor transkripsi inu berperan pentingdalam mengatur transkripsi sitokin proinflamasi seperti tumor necrosis factor (TNF-α dan interleukin (IL-1β. Leptin dapat meningkatkan pembentukan reactive oxygen species (ROS sel endotel pembuluh darah dan menstimulasi sekresi TNF-α dan IL-6 yang merupakan promotor hipertensi dan aterosklerosis.Kata Kunci: obesitas, leptin, sistem kardiovaskuler 

  5. ANEMIA DAN ANEMIA GIZI BESI PADA KEHAMILAN: HUBUNGANNYA DENGAN ASUPAN PROTEIN DAN ZAT GIZI MIKRO

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    Nur Handayani Utami

    2015-03-01

    Full Text Available Anemia masih menjadi permasalahan kesehatan pada wanita hamil. Zat besi dianggap sebagai salah satu zat gizi mikro yang berperan terhadap terjadinya anemia. Kekurangan gizi besi dalam tingkat lanjut dapat menyebabkan anemia, yang disebut sebagai anemia gizi besi. Tujuan studi ini adalah untuk menganalisis perbedaan antara asupan protein dan gizi mikro serta menghitung odd ratio (OR kejadian anemia dan anemia gizi besi akibat asupan protein dan gizi mikro pada wanita hamil di lokasi studi. Analisis ini merupakan analisa dari data studi kohor Tumbuh Kembang anak pada tahun pertama, yang dilaksanakan di Kelurahan Kebon Kalapa dan Ciwaringin, Kota Bogor yang dianalisa menggunakan disainkasus kontrol. Sebanyak 47 ibu hamil menjadi sampel dalam analisa ini. Kategori untuk anemia yaitu apabila kadar hemoglobin (Hb ibu hamil ≤11 g/dL. Kekurangan gizi besi dikategorikan apabila kadar serum transferrin reseptor (sTfR diatas 4.4 mg/L. Sedangkan Anemia Gizi Besi dikategorikan apabila memiliki kadar Hb < 11 g/dL dan sTfr > 4.4 mg/L. Tes one way anova digunakan untuk menganalisa adanya perbedaan asupan energi, protein dan zat gizi mikro antara ibu hamil yang mengalami anemia, anemia gizi besi maupun yang normal. Odd ratio dianalisa dengan menggunakan uji chi square. Nilai signifikan ditentukan apabila nilai p value < 0.05 dan perhitungan OR> 1. 27.7% dari ibu hamil di lokasi studi mengalami anemia, 14.9% tergolong dalam anemia ringan, 10.6% anemia sedang dan 2.1% anemia berat. Anemia gizi besi dialami oleh 17% dari wanita hamil. Terdapat hubungan yang signifikan antara keparahan anemia dan terjadinya anemia gizi besi. Tidak ditemukan perbedaan antara asupan protein, besi, folate dan zink pada wanita yang mengalami anemia, anemia gizi besi maupun yang normal. Akan tetapi terdapat kecenderungan bahwa asupan zat besi dan seng pada ibu yang anemia dan anemia gizi besi lebih rendah daripada ibu yang normal. Anemia masih menjadi permasalahan kesehatan pada ibu

  6. PERAN TEKNOLOGI KOMUNIKASI DALAM INTERAKSI AYAH DAN ANAK STUDI KASUS: INTERAKSI AYAH DAN ANAK MELALUI SMARTPHONE

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    Detania Savitri

    2016-02-01

    Fungsi ayah dalam keluarga adalah sebagai pencari nafkah untuk memenuhi kebutuhan keluarga, sementara ibu berfungsi dalam mendidik anak. Ayah yang bekerja penuh waktu akan berkurang interaksinya dengan anak. Disisi lain, teknologi komunikasi diciptakan untuk mempermudah interaksi antar individu. Penelitian ini ingin mengetahui apakah smartphone dapat meningkatkan intensitas kedekatan interaksi antara ayah dan anak. Selain itu, penelitian ini juga ingin mengetahui apakah ayah dapat memberikan sosialisasi kepada anak melalui smartphone dan mengontrol keseharian anak. Artikel ini menggunakan perspektif fungsionalis. Pendekatan kualitatif digunakan oleh penulis dengan mewawancarai tiga ayah dan tiga anak berusia 20 tahun ke atas yang sama-sama menggunakan smartphone di kota Depok. Temuan yang diperoleh penulis yaitu smartphone dapat merubah interaksi ayah dengan anak, dan ayah dapat memberikan kontrol sosial kepada anak dalam interaksi melalui smartphone. Dalam interaksi ayah dan anak, smartphone juga dapat digunakan ayah untuk mensosialisasikan nilai-nilai kepada anak.

  7. KEABSAHAN PERUBAHAN DAN PENAMBAHAN PERATURAN HUKUM PIDANA MELALUI PERPPU DAN PERMA

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    Amiruddin Amiruddin

    2013-12-01

    Full Text Available KUHP yang berlaku sekarang berasal dari “Wetboek van Strafrecht voor Nederlandsh-Indie” 1918dan dinyatakan berlaku di Indonesia berdasarkan UU Nomor 1 Tahun 1946 juncto UU Nomor 73 Tahun1958. Mengingat usianya yang sangat tua, maka beberapa ketentuan yang ada dalam KUHP sudah tentuketinggalan dan harus disesuaikan dengan perkembangan masyarakat dan ilmu pengetahuan. Meskipuntelah ada upaya untuk melakukan perubahan yang menyeluruh melalui penyusunan RUU KUHP namunbelum juga disahkan. Oleh karena itu, maka pola perubahan yang dilakukan adalah bersifat parsial yaitumulai dari Perpu Nomor 16 Tahun 1960 sampai dengan Peraturan Mahkamah Agung Nomor 2 Tahun2012 tentang Penyesuaian Batasan Tindak Pidana Ringan dan Jumlah Denda dalam KUHP. Perubahanyang dilakukan itu pun ada yang sesuai dengan prosedur dan ada juga yang tidak sesuai dengan prosedurperubahan perundang-undangan.Kata kunci: perubahan, penambahan, KUHP.

  8. PERFORMANS DAN INDEKS KELEMBABAN SUHU KELINCI JANTAN (Lepus nigricollis YANG DIPELIHARA DENGAN LUAS LANTAI KANDANG DAN DIBERI RANSUM DENGAN IMBANGAN ENERGI DAN PROTEIN BERBEDA

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    Eny Puspani

    2016-01-01

    Full Text Available Penelitian yang bertujuan mempelajari indeks kelembaban suhu atau temperature humidity index dan performans kelinci jantan lokal pada kepadatan ternak berbeda dan diberi ransum dengan imbangan energi protein berbeda telah dilakukan dengan menggunakan Rancangan Acak Kelompok (RAK pola Faktorial 2 x 3 dengan empat kali ulangan (blok. Sebagai perlakuan pertama adalah imbangan energi dan protein pada ransum (R yang terdiri dari ransum dengan kandungan energi termetabolis 2500 kkal/kg dan protein kasar 17% dengan imbangan energi dan protein 147 (R1, ransum dengan kandungan energi termetabolis 2800 kkal/kg dengan kandungan protein kasar 18,5% dengan imbangan energy dan protein 151 (R2. Sebagai perlakuan kedua adalah luas lantai kandang (L yang terdiri dari 3500 cm2 (L1, 1750 cm2 (L2 dan 1166 cm2 (L3. Hasil penelitian menunjukkan bahwa iklim mikro pada perlakuan tingkat kepadatan ternak dan ransum dengan imbangan energi dan protein yang berbeda memberikan pengaruh tidak berbeda nyata (P>0,05 terhadap kelembapan udara, temperatur udara, “temperature humidity index” dan radiasi matahari. Performans pada perlakuan ransum dengan imbangan energy dan protein R1 menyebabkan konsumsi air, ransum, berat badan akhir dan pertambahan berat badan lebih tinggi (P0,05. Performans pada perlakuan tingkat kepadatan ternak L2 dan L3 menyebabkan konsumsi air dan ransum lebih tinggi sehingga berat badan akhir pada kandang L2 dan L3 juga lebih tinggi dibandingkan L1 kecuali pertambahan berat badan dan FCR memberikan pengaruh tidak berbeda nyata (P>0,05. Berdasarkan hasil penelitian dapat disimpulkan bahwa tidak terjadi perbedaan iklim mikro pada kandang dengan perlakuan ransum dengan imbangan energi dan protein berbeda serta perlakuan dengan tingkat kepadatan ternak berbeda. Kelinci yang diberi ransum dengan imbangan energi dan protein 147 (R1 menghasilkan performans lebih tinggi daripada imbangan energi dan protein 151 (R2. Kelinci yang dipelihara pada tingkat

  9. PERKEMBANGAN DAN EKSISTENSI MUSIK TARLING CIREBON

    Directory of Open Access Journals (Sweden)

    Salim -

    2015-08-01

    Full Text Available Kemajuan teknologi berpengaruh terhadap perkembangan Tarling namun demikian Tarling masih tetap menunjukan eksistensinya. Nampaknya ada hal yang menarik bagi peneliti untuk selanjutnya mengadakan penelitian tentang perkembangan dan eksistensi Tarling. Sehubungan dengan permasalahan tersebut maka masalah penelitiannya adalah bagaimana perkembangan Tarling, dan Bagaimana eksistensi Tarling. Penelitian Tesis ini menggunakan metoda penelitian kualitatif. Peneliti berusaha mendeskripsikan perkembangan dan eksistensi Tarling. Untuk memahami  perkembangan, dan eksistensi maka penelitian ini  menggunakan teori perkembangan dan eksistensi. Teknik pengumpulan data dilakukan dengan cara observasi, wawancara, dan dokumentasi. Pemeriksaan keabsahan data dilakukan dengan  menggunakan metode tringulasi. Analisis data dilakukan dengan tahapan: Reduksi data, penyajian data dan penarikan kesimpulan. Hasil penelitian menunjukan bahwa berdasarkan perkembangannya Tarling mengalami beberapa periodisasi perubahan yaitu periode musik, periode  lagu dan lawak kemudian periode teater. Berkenaan dengan eksistensinya musik Tarlingpun mengalami perubahan bentuk yaitu Tarling kreasi dan Tarling dangdut. Eksistensi musik Tarling terbentuk melalui proses akulturasi. Saran dari hasil penelitian menyatakan bahwa, perubahan yang terjadi dalam  Tarling dimaksudkan sebagai upaya agar Tarling tetap menarik kemudian eksis. Maka bagi Para tokoh masyarakat, seniman Tarling, pemerintah dan masyarakat Cirebon harus bersinergi melakukan berbagai langkah agar Tarling tetap menujukan eksistensinya The progress of technology influence the development Tarling, however Tarling still shows its existence. It seems that there is something interesting for researchers to conduct further research on the development and existence Tarling. In connection with these problems, the research problem is how the development Tarling and How existence Tarling. This thesis research uses qualitative

  10. Konflik dan Kontestasi Penataan Ruang Kota Surabaya

    Directory of Open Access Journals (Sweden)

    Siti Aminah

    2016-01-01

    Full Text Available Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Artikel ini merangkum dua hal. Pertama, permasalahan praktik penataan ruang di perkotaan, khususnya di Surabaya, yang telah menimbulkan kontestasi dan konflik dengan melibatkan aktor pemerintah, masyarakat, dan kekuatan kapitalis/investor. Kedua, kerangka penataan ruang yang menggunakan Perda RTRW No. 3 Tahun 2007 telah menimbulkan dampak yang berujung pada penguatan dan keberpihakan pemerintah kota kepada pihak kapitalis/investor. Kedua hal tersebut dianalisis dengan menggunakan pendekatan sosio-spasial. Penelitian dilakukan dengan menggunakan pendekatan kualitatif dan analisis deskriptif. Problematika praktik tata ruang yang ada di Surabaya merupakan indikasi dari transformasi dalam proses penataan ruang di mana ruang bukan hanya diproduksi dan direproduksi untuk kepentingan klas kapitalis, melainkan juga ruang direstrukturisasi dengan cara mengubah fungsi ruang dan diperuntukkan untuk publik. Hal ini relevan dengan perkembangan kajian penataan ruang mutakhir yang menunjukkan bahwa praktik penataan ruang di perkotaan merupakan refleksi dari kondisi sosial, ekonomi, dan politik. Selain itu, ruang diproduksi dalam modus produksi kapitalis dan ekspresi ruang kota merupakan dialektika antara produksi, konsumsi, dan administrasi (perencanaan dan implementasi kebijakan.  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 This article summarizes two hypotheses. Firstly, the practices problem of spatial planning in urban areas, especially in Surabaya City, has led to the contestation and conflict among governmental actors, the public, and the power of capitalist/investor. Secondly, the use of spatial planning framework, in this case is the use of Local Regulation on Urban Planning and Land Use Number 3 year of 2007, has shown the partiality and strengthening investor by the government. These hypotheses are analyzed by using socio spatial approach. The

  11. Titanium photocatalyst against human pathogenic microorganisms

    International Nuclear Information System (INIS)

    Kussovski, V.; Stefchev, P.; Kirilov, R.

    2011-01-01

    The conventional methods of disinfection are not effective in the longer term. They are time and staff intensive and use aggressive chemicals. Photocatalytic oxidation on surfaces coated with titanium dioxide (TiO 2 ) might offer a possible alternative. The antimicrobial activity of TiO 2 powder P25 and thin films of TiO 2 on glass slides against representative strains of microorganisms associated with hospital-acquired infections (Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans) was investigated in vitro. High efficiency has been found in the case of the studied bacterial strains, particularly for the P. aeruginosa. It was shown that it is possible to disinfect surfaces coated with TiO 2 and stimulated by UV-A light. The reduction efficiencies for P. aeruginosa, S. aureus and C. albicans were 3.19, 2.32 and 1.22. In all cases sublethal UV-A doses provoked an important lethality in the presence of TiO 2 . (authors)

  12. Black Titanium Dioxide Nanomaterials in Photocatalysis

    Directory of Open Access Journals (Sweden)

    Xiaodong Yan

    2017-01-01

    Full Text Available Titanium dioxide (TiO2 nanomaterials are widely considered to be state-of-the-art photocatalysts for environmental protection and energy conversion. However, the low photocatalytic efficiency caused by large bandgap and rapid recombination of photo-excited electrons and holes is a challenging issue that needs to be settled for their practical applications. Structure engineering has been demonstrated to be a highly promising approach to engineer the optical and electronic properties of the existing materials or even endow them with unexpected properties. Surface structure engineering has witnessed the breakthrough in increasing the photocatalytic efficiency of TiO2 nanomaterials by creating a defect-rich or amorphous surface layer with black color and extension of optical absorption to the whole visible spectrum, along with markedly enhanced photocatalytic activities. In this review, the recent progress in the development of black TiO2 nanomaterials is reviewed to gain a better understanding of the structure-property relationship with the consideration of preparation methods and to project new insights into the future development of black TiO2 nanomaterials in photocatalytic applications.

  13. Porous Titanium for Dental Implant Applications

    Directory of Open Access Journals (Sweden)

    Zena J. Wally

    2015-10-01

    Full Text Available Recently, an increasing amount of research has focused on the biological and mechanical behavior of highly porous structures of metallic biomaterials, as implant materials for dental implants. Particularly, pure titanium and its alloys are typically used due to their outstanding mechanical and biological properties. However, these materials have high stiffness (Young’s modulus in comparison to that of the host bone, which necessitates careful implant design to ensure appropriate distribution of stresses to the adjoining bone, to avoid stress-shielding or overloading, both of which lead to bone resorption. Additionally, many coating and roughening techniques are used to improve cell and bone-bonding to the implant surface. To date, several studies have revealed that porous geometry may be a promising alternative to bulk structures for dental implant applications. This review aims to summarize the evidence in the literature for the importance of porosity in the integration of dental implants with bone tissue and the different fabrication methods currently being investigated. In particular, additive manufacturing shows promise as a technique to control pore size and shape for optimum biological properties.

  14. Biomolecule-coated metal nanoparticles on titanium.

    Science.gov (United States)

    Christensen, Stephen L; Chatt, Amares; Zhang, Peng

    2012-02-07

    Immobilizations of nanoparticles and biomolecules on biocompatible substrates such as titanium are two promising approaches to bringing new functionalities to Ti-based biomaterials. Herein, we used a variety of X-ray spectroscopic techniques to study and better understand metal-thiolate interactions in biofunctionalized metal nanoparticle systems supported on Ti substrates. Using a facile one-step procedure, a series of Au nanoparticle samples with varied biomolecule coatings ((2-mercatopropionyl)glycine (MPG) and bovine serum albumin (BSA)) and biomolecule concentrations are prepared. Ag and Pd systems are also studied to observe change with varying metal composition. The structure and properties of these biomolecule-coated nanoparticles are investigated with scanning electron microscopy (SEM) and element-specific X-ray techniques, including extended X-ray absorption fine structure (Au L(3)-edge), X-ray absorption near-edge structure (Au L(3), Ag L(3), Pd L(3), and S K-edge), and X-ray photoelectron spectroscopy (Au 4f, Ag 3d, Pd 3d, and S 2p core level). It was found that, by comparison of SEM and X-ray spectroscopy results, the coating of metal nanoparticles with varying model biomolecule systems can have a significant effect on both surface coverage and organization. This work offers a facile chemical method for bio- and nanofunctionalization of Ti substrates as well as provides a physical picture of the structure and bonding of biocoated metal nanoparticles, which may lead to useful applications in orthopedics and biomedicine.

  15. Thermal decomposition of titanium deuteride thin films

    International Nuclear Information System (INIS)

    Malinowski, M.E.

    1983-01-01

    The thermal desorption spectra of deuterium from essentially clean titanium deuteride thin films were measured by ramp heating the films in vacuum; the film thicknesses ranged from 20 to 220 nm and the ramp rates varied from 0.5 to about 3 0 C s - 1 . Each desorption spectrum consisted of a low nearly constant rate at low temperatures followed by a highly peaked rate at higher temperatures. The cleanliness and thinness of the films permitted a description of desorption rates in terms of a simple phenomenological model based on detailed balancing in which the low temperature pressure-composition characteristics of the two-phase (α-(α+#betta#)-#betta#) region of the Ti-D system were used as input data. At temperatures below 340 0 C the model predictions were in excellent agreement with the experimentally measured desorption spectra. Interpretations of the spectra in terms of 'decomposition trajectories'' are possible using this model, and this approach is also used to explain deviations of the spectra from the model at temperatures of 340 0 C and above. (Auth.)

  16. Titanium nitride room-temperature ferromagnetic nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Morozov, Iu.G., E-mail: morozov@ism.ac.ru [Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 8 Academician Osipyan Street, Chernogolovka, Moscow Region, 142432 (Russian Federation); Belousova, O.V. [Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 8 Academician Osipyan Street, Chernogolovka, Moscow Region, 142432 (Russian Federation); Belyakov, O.A. [Ogarev Mordovia State University, Saransk, 68 Bol' shevistskaya Street, 430005 (Russian Federation); Parkin, I.P., E-mail: i.p.parkin@ucl.ac.uk [Department of Chemistry, Materials Chemistry Research Centre, University College London, 20 Gordon Street, London, WC1H 0AJ (United Kingdom); Sathasivam, S. [Department of Chemistry, Materials Chemistry Research Centre, University College London, 20 Gordon Street, London, WC1H 0AJ (United Kingdom); Kuznetcov, M.V., E-mail: maxim1968@mail.ru [All-Russian Research Institute on Problems of Civil Defense and Emergencies of Emergency Control Ministry of Russia (EMERCOM), 7 Davidkovskaya Street, Moscow, 121352 (Russian Federation)

    2016-08-05

    Cubic and near-spherical TiN nanoparticles ranging in average size from 20 to 125 nm were prepared by levitation-jet aerosol synthesis through condensation of titanium vapor in an inert gas flow with gaseous nitrogen injection. The nanoparticles were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD), BET measurements, UV–Vis, FT-IR, Raman spectroscopy, XPS, and vibrating-sample magnetometry. Room-temperature ferromagnetism with maximum magnetization up to 2.5 emu/g was recorded for the nanoparticles. The results indicate that the observed ferromagnetic ordering was related to the defect Ti–N structures on the surface of nanoparticles. This suggestion is in good correlation with the measured spectroscopical data. - Highlights: • Levitation-jet aerosol synthesis of TiN nanoparticles (NPs). • SEM, XRD, BET, UV–vis, FT-IR, Raman, XPS and magnetic characterization of the NPs. • Correlation between optical and XPS measurements data and maximum magnetization of the NPs.

  17. Nanomaterial Case Studies: Nanoscale Titanium Dioxide ...

    Science.gov (United States)

    This draft document presents two case studies of nanoscale titanium dioxide (nano-TiO2) used (1) to remove arsenic from drinking water and (2) as an active ingredient in topical sunscreen. The draft case studies are organized around a comprehensive environmental assessment approach that combines a product life cycle framework with the risk assessment paradigm. The document does not draw conclusions about potential risks. Rather, the case studies are intended to help identify what needs to be known in order to conduct a comprehensive environmental assessment of the potential risks related to nano-TiO2. This draft document is part of a process that will inform the development of EPA’s research strategy to support nanomaterial risk assessments. The complex properties of various nanomaterials make evaluating them in the abstract or with generalizations difficult if not impossible. Thus, this document focuses on two specific uses of nano-TiO2, as a drinking water treatment and as topical sunscreen. These case studies do not represent completed or even preliminary assessments; rather, they present the structure for identifying and prioritizing research needed to support future assessments.

  18. Sample of superconducting wiring (Niobium Titanium)

    CERN Multimedia

    About NbTi cable: The cable consists of 36 strands of superconducting wire, each strand has a diameter of 0.825 mm and houses 6300 superconducting filaments of niobium-titanium (Nb-Ti, a superconducting alloy). Each filament has a diameter of about 0.006 mm, i.e. 10 times smaller than a typical human hair. The filaments are embedded in a high-purity copper matrix. Copper is a normal conducting material. The filaments are in the superconductive state when the temperature is below about -263ºC (10.15 K). When the filaments leave the superconductive state, the copper acts as conductor transports the electrical current. Each strand of The NbTi cable (at superconducting state) has a current density of up to above 2000 A/mm2 at 9 T and -271ºC (2.15 K). A cable transport a current of about 13000 A at 10 T and -271ºC (2.15 K). About LHC superconducting wiring: The high magnetic fields needed for the LHC can only be reached using superconductors. At very low temperatures, superconductors have no electrical resistan...

  19. Sample of superconducting wiring (Niobium Titanium)

    CERN Multimedia

    About NbTi cable: The cable consists of 36 strands of superconducting wire, each strand has a diameter of 0.825 mm and houses 6300 superconducting filaments of niobium-titanium (Nb-Ti, a superconducting alloy). Each filament has a diameter of about 0.006 mm, i.e. 10 times smaller than a typical human hair. The filaments are embedded in a high-purity copper matrix. Copper is a normal conducting material. The filaments are in the superconductive state when the temperature is below about -263ºC (10.15 K). When the filaments leave the superconductive state, the copper acts as conductor transports the electrical current. Each strand of The NbTi cable (at superconducting state) has a current density of up to above 2000 A/mm2 at 9 T and -271ºC (2.15 K). A cable transport a current of about 13000 A at 10 T and -271ºC (2.15 K). About LHC superconducting wiring: The high magnetic fields needed for the LHC can only be reached using superconductors. At very low temperatures, superconductors have no electrical resista...

  20. Fully CMOS-compatible titanium nitride nanoantennas

    Energy Technology Data Exchange (ETDEWEB)

    Briggs, Justin A., E-mail: jabriggs@stanford.edu [Department of Applied Physics, Stanford University, 348 Via Pueblo Mall, Stanford, California 94305 (United States); Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305 (United States); Naik, Gururaj V.; Baum, Brian K.; Dionne, Jennifer A. [Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305 (United States); Petach, Trevor A.; Goldhaber-Gordon, David [Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California 94305 (United States)

    2016-02-01

    CMOS-compatible fabrication of plasmonic materials and devices will accelerate the development of integrated nanophotonics for information processing applications. Using low-temperature plasma-enhanced atomic layer deposition (PEALD), we develop a recipe for fully CMOS-compatible titanium nitride (TiN) that is plasmonic in the visible and near infrared. Films are grown on silicon, silicon dioxide, and epitaxially on magnesium oxide substrates. By optimizing the plasma exposure per growth cycle during PEALD, carbon and oxygen contamination are reduced, lowering undesirable loss. We use electron beam lithography to pattern TiN nanopillars with varying diameters on silicon in large-area arrays. In the first reported single-particle measurements on plasmonic TiN, we demonstrate size-tunable darkfield scattering spectroscopy in the visible and near infrared regimes. The optical properties of this CMOS-compatible material, combined with its high melting temperature and mechanical durability, comprise a step towards fully CMOS-integrated nanophotonic information processing.