Accedi

Bibliografie tematiche / Barium

Indice

Articoli di riviste
Tesi
Libri
Capitoli di libri
Atti di convegni
Rapporti di organizzazioni

Letteratura scientifica selezionata sul tema "Barium"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 agosto 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Barium".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Barium"

1

Reissig, Falco, Klaus Kopka e Constantin Mamat. "Die Bedeutung des Elementes Barium in der Nuklearmedizin". Der Nuklearmediziner 44, n. 02 (giugno 2021): 127–34. http://dx.doi.org/10.1055/a-1382-2812.

Testo completo

Abstract (sommario):

ZusammenfassungVon Erdalkalimetallionen außer Beryllium ist bekannt, dass sie ein calcimimetisches Verhalten zeigen. Damit ist ihr Schicksal in vivo vorgezeichnet, das in einem beträchtlichen Maße durch den Einbau in Knochengewebe, welches zum Hauptteil aus Hydroxylapatit besteht, charakterisiert ist. In diesem Sinne wurde auch die Verwendung von Radionukliden dieser Elemente als Knochensucher forciert. Mit Ausnahme von Beryllium und Magnesium wurden Tierexperimente und Humananwendungen mit Radionukliden von Calcium, Strontium, Barium und Radium durchgeführt, wobei bis heute lediglich Strontium und Radium, in der Hauptsache als Therapienuklide zur palliativen Behandlung von Knochenmetastasen, Eingang in nuklearmedizinische Routineanwendungen gefunden haben. In diesem Übersichtsartikel werden die Radionuklide des Bariums vorgestellt, sowie deren Herstellung und Verwendung. Aktuelle Forschungsergebnisse mit Radionukliden des Bariums in Radiopharmazie und Nuklearmedizin werden präsentiert.

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Urade, Masaaki, e Toshihumi Shinbo. "Barium Appendicitis 1 Month After a Barium Meal". International Surgery 97, n. 4 (1 gennaio 2013): 296–98. http://dx.doi.org/10.9738/cc160.1.

Testo completo

Abstract (sommario):

Abstract Because barium sulfate (BaSO4) is not harmful to the mucosa, it is widely used for gastrointestinal imaging. Barium appendicitis is a very rare complication of barium meals and barium enema. We report a case of acute appendicitis associated with retained appendiceal barium. A 47-year-old man presented with right lower abdominal pain after upper gastrointestinal imaging was performed using barium 1 month earlier. The abdominal plain roentgenogram showed an area of retained barium in the right lower quadrant. Multiplanar reconstruction of computed tomography scans showed barium retention in the appendix. Emergency appendectomy was performed. A cross section of the specimen revealed the barium mass. Barium-associated appendicitis is a very rare clinical entity but we should be cautious of this uncommon disease when we encounter barium deposits in the appendix after barium examination. This report is significant because barium was identified both macroscopically and microscopically.

Gli stili APA, Harvard, Vancouver, ISO e altri

3

&NA;. "Barium". Reactions Weekly &NA;, n. 1403 (maggio 2012): 10. http://dx.doi.org/10.2165/00128415-201214030-00025.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

&NA;. "Barium". Reactions Weekly &NA;, n. 369 (settembre 1991): 5. http://dx.doi.org/10.2165/00128415-199103690-00016.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

&NA;. "Barium". Reactions Weekly &NA;, n. 1227 (novembre 2008): 6–7. http://dx.doi.org/10.2165/00128415-200812270-00017.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Willms, Ann Bagley. "Barium". American Journal of Roentgenology 179, n. 4 (ottobre 2002): 1022. http://dx.doi.org/10.2214/ajr.179.4.1791022.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

&NA;. "Barium". Reactions Weekly &NA;, n. 1257 (giugno 2009): 10. http://dx.doi.org/10.2165/00128415-200912570-00030.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

&NA;. "Barium". Reactions Weekly &NA;, n. 1326 (novembre 2010): 10. http://dx.doi.org/10.2165/00128415-201013260-00031.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

DALTON, LOUISA WRAY. "BARIUM". Chemical & Engineering News 81, n. 36 (8 settembre 2003): 134. http://dx.doi.org/10.1021/cen-v081n036.p134.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Free, B., G. Meadows e G. Jaafari. "Barium/barium oxide dispensation rate measurement". Applied Surface Science 24, n. 3-4 (ottobre 1985): 460–74. http://dx.doi.org/10.1016/0169-4332(85)90193-x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Tesi sul tema "Barium"

1

Zhong, Zhimin. "Combustion syntheses and characterization of Barium Titanate, Barium Tetratitanate and Lead substituted Barium Tetratitanate /". The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487861396027028.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Rai, Maha. "Molecular dynamics modelling of barium silicate and barium fluorozirconate glasses". Thesis, University of Kent, 2018. https://kar.kent.ac.uk/66702/.

Testo completo

Abstract (sommario):

Advancement in science and technology has profoundly depended on new types of glass innovation. The glasses that were studied in this project are binary barium silicate glasses, binary barium fluorozirconate glasses, ZBLAN glasses and 〖Eu〗^(3+) doped ZBLAN glass (the ZBLAN glasses are based on binary barium fluorozirconate glass). The high atomic number of barium in the barium silicate glasses provides high mass and high electron density providing its applications for heat and X-ray shielding. The phenomena such as phase separation in the barium silicate glass will affect its properties of durability and electrical conductivity. On the other hand, ZBLAN glasses have a broad infrared optical transmission window due to the weaker bonding/interaction of F^- ions. Due to the presence of lanthanum in the composition ZBLAN glass can be easily doped with rare-earth ions such as 〖Eu〗^(3+) giving it many optical applications such as optical amplifier and fibre lasers. Hence, it's essential to study the structure of these glasses to understand their properties for applications. This thesis used the classical molecular dynamics modelling technique to study the static atomic structure of glass. Generally, fluoride glasses can be formed by totally replacing oxygen atoms in oxide glasses by fluorine atoms. The oxide silicate glasses are common glasses that follow the Zachriasen rules of glass formation but the fluorozirconate glasses do not and lack fixed structural units. The structure analysis was performed at short-range order (e.g. coordination number, bond length and bond angle), medium-range order (e.g. network connectivity) and long- range order (e.g. phase separation). The related crystals were also simulated in similar conditions to the glasses to compare their atomic structure. Normally at short-range order glass structure is similar to its related crystal but the differences between them starts from the position and number of next nearest neighbours and increases thereafter. Additionally, the new methods such as rotational invariants and grid analysis were used to scrutinise structural units and phase separation respectively. The model of barium silicate glass shows good agreement with experimental diffraction data. The typical bond length and coordination number for Ba were 2.97 Å and approximately 7 respectively. The model did not show any phase separation at low Ba content and hence for further investigation very large models of alkaline earth silicate glasses were studied to see how Ba, Ca and Mg are distributed in the glass. The grid analysis was used to see the distributions which show homogeneity for Ba and Ca and inhomogeneity for Mg cation. The structural units of fluorozirconate glasses were carefully studied as they do not follow the Zachriasen glass model. The coordination number for Zr was mixture of 7 and 8. The rotational invariant analysis shows that the structural units of ZrF_n polyhedra for coordination number 7 and 8 were similar to Augmented Triangular Prism and Biaugmented Triangular Prism respectively. However, rotational invariant values for BaF_n polyhedra tend more towards random. The large complex model of 〖Eu〗^(3+) doped ZBLAN glass was made as it is studied for optical applications. The initial analysis was to observe whether Zr and Ba has similar structural roles as in binary fluorozirconate glass system which they do. Considering the extra elements in ZBLAN glass, Al behaves like a network former and has octahedra structural units whereas La and Na behave like modifiers. In the glass Eu was uniformly distributed with predominantly coordination number of 8 and does not have well defined structural units.

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Kinsey-Nielsen, Susan Mary. "HIGH-RESOLUTION LASER SPECTROSCOPY OF BARIUM-MONOHYDROXIDE AND BARIUM-MONODEUTEROXIDE". Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/292080.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Kirby, Nigel Matthew. "Barium zirconate ceramics for melt processing of barium cuprate superconductors". Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/1364.

Testo completo

Abstract (sommario):

The widespread use of high temperature superconductors through improved understanding of their underlying physics is in part dependent on the synthesis of large, high quality single crystals for physical research. Crucible corrosion is an important factor hindering the routine synthesis of large, high purity rare-earth barium cuprate superconductor single crystals. Molten BaCuO2-CuO fluxes required for the growth of such crystals are highly corrosive to substrate materials, and corrosion products may lead to chemical contamination of crystals and other practical difficulties. BaZrO3 is known to be inert to BaCuO2-CuO melts, but its use has remained restricted to a very small number of laboratories worldwide because it is very sensitive to the effects of off- stoichiometric or residual secondary phases which degrade its performance. BaZrO3 suitable for sustained melt containment is difficult to produce due to kinetic limitations of phase purity, difficulty in sintering to adequate density, and very narrow stoichiometry tolerances of finished ceramics. The existing literature provided a guide to the production of high quality BaZrO3, but was not sufficiently complete to readily allow production of crucibles suitable for this application. The two basic aims of this project were: To provide a comprehensive and quantitative description of the necessary attributes of crucibles for barium cuprate melt processing and to expand the knowledge of solid-state BaZrO3 processing to encourage its widespread application to crucible manufacture; To explore the application of solution chemical processes whose potential benefits could lead to routine application of BaZrO3 through improved ceramic quality and processing properties.Based primarily on solid-state processing research, the optimal stoichiometry for corrosion resistant crucibles was observed over the narrow range of 1.003±0.003 Ba : (Zr + Ht) mole ratio. Residual ZrO2 must be strictly avoided even at very low levels because severe localized expansion of Z a grains during reaction with the melt severely reduces corrosion resistance. Although the effect of Ba-rich phases are less severe, their abundance must be suppressed as much as allowed by the production process. Solid-state derived crucibles with a large barium excess were unstable and readily attacked by water. TEM analysis clearly showed residual Zr02 was present as discrete grains and not as grain boundary films, and also the prevalence of intragranular defects in Ba-rich ceramics. Quantitative knowledge of the narrow range of required stoichiometry is critical for developing successful solid-state and solution chemical processes. Reliably achieving the required stoichiometry and phase purity is experimentally challenging and beyond the capability of many processing systems. Systematic investigation revealed sharp changes in physical properties of processed powders across the phase boundary. The resistance of BaZrO3, of the desired stoichiometry to grain growth during powder processing has not previously been reported in the available literature. At the desired stoichiometry for corrosion resistance, powder grain growth resistance combined with very precise control over stoichiometry makes the solid-state process more competitive with solution-based processes than previously acknowledged in the literature. The development of solution processes for BaZr03 precursors is complicated by aqueous chemistry of zirconium compounds.This project developed the first chemically derived precursor process demonstrated to produce a ceramic of adequate quality for sustained barium cuprate melt containment. The barium acetate / zirconium oxychloride / ammonium oxalate system provided control over stoichiometry without requiring elevated solution temperatures, a large excess of barium reagents, or reagents containing alkalis. Despite showing the capability to supersede the solid-state process, the oxalate process still requires further refinement to more reliably achieve high sintered densities. Although the attributes required for sustained barium cuprate melt containment are now clear, its routine mass production remains reliant on further development of solution chemical techniques or improvements to the kinetics of solid-state processing. This project advanced ceramic design and processing technology in the BaZrO3 system and provided new approaches in meeting the challenging analytical needs of research and process control for high quality production of this compound.

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Kirby, Nigel Matthew. "Barium zirconate ceramics for melt processing of barium cuprate superconductors". Curtin University of Technology, Department of Applied Physics, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=16216.

Testo completo

Abstract (sommario):

The widespread use of high temperature superconductors through improved understanding of their underlying physics is in part dependent on the synthesis of large, high quality single crystals for physical research. Crucible corrosion is an important factor hindering the routine synthesis of large, high purity rare-earth barium cuprate superconductor single crystals. Molten BaCuO2-CuO fluxes required for the growth of such crystals are highly corrosive to substrate materials, and corrosion products may lead to chemical contamination of crystals and other practical difficulties. BaZrO3 is known to be inert to BaCuO2-CuO melts, but its use has remained restricted to a very small number of laboratories worldwide because it is very sensitive to the effects of off- stoichiometric or residual secondary phases which degrade its performance. BaZrO3 suitable for sustained melt containment is difficult to produce due to kinetic limitations of phase purity, difficulty in sintering to adequate density, and very narrow stoichiometry tolerances of finished ceramics. The existing literature provided a guide to the production of high quality BaZrO3, but was not sufficiently complete to readily allow production of crucibles suitable for this application. The two basic aims of this project were: To provide a comprehensive and quantitative description of the necessary attributes of crucibles for barium cuprate melt processing and to expand the knowledge of solid-state BaZrO3 processing to encourage its widespread application to crucible manufacture; To explore the application of solution chemical processes whose potential benefits could lead to routine application of BaZrO3 through improved ceramic quality and processing properties.
Based primarily on solid-state processing research, the optimal stoichiometry for corrosion resistant crucibles was observed over the narrow range of 1.003±0.003 Ba : (Zr + Ht) mole ratio. Residual ZrO2 must be strictly avoided even at very low levels because severe localized expansion of Z a grains during reaction with the melt severely reduces corrosion resistance. Although the effect of Ba-rich phases are less severe, their abundance must be suppressed as much as allowed by the production process. Solid-state derived crucibles with a large barium excess were unstable and readily attacked by water. TEM analysis clearly showed residual Zr02 was present as discrete grains and not as grain boundary films, and also the prevalence of intragranular defects in Ba-rich ceramics. Quantitative knowledge of the narrow range of required stoichiometry is critical for developing successful solid-state and solution chemical processes. Reliably achieving the required stoichiometry and phase purity is experimentally challenging and beyond the capability of many processing systems. Systematic investigation revealed sharp changes in physical properties of processed powders across the phase boundary. The resistance of BaZrO3, of the desired stoichiometry to grain growth during powder processing has not previously been reported in the available literature. At the desired stoichiometry for corrosion resistance, powder grain growth resistance combined with very precise control over stoichiometry makes the solid-state process more competitive with solution-based processes than previously acknowledged in the literature. The development of solution processes for BaZr03 precursors is complicated by aqueous chemistry of zirconium compounds.
This project developed the first chemically derived precursor process demonstrated to produce a ceramic of adequate quality for sustained barium cuprate melt containment. The barium acetate / zirconium oxychloride / ammonium oxalate system provided control over stoichiometry without requiring elevated solution temperatures, a large excess of barium reagents, or reagents containing alkalis. Despite showing the capability to supersede the solid-state process, the oxalate process still requires further refinement to more reliably achieve high sintered densities. Although the attributes required for sustained barium cuprate melt containment are now clear, its routine mass production remains reliant on further development of solution chemical techniques or improvements to the kinetics of solid-state processing. This project advanced ceramic design and processing technology in the BaZrO3 system and provided new approaches in meeting the challenging analytical needs of research and process control for high quality production of this compound.

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Lehnen, Peer. "Relaxoreigenschaften von Strontium-Barium-Niobat - Relaxor Properties of Strontium-Barium-Niobate". Gerhard-Mercator-Universitaet Duisburg, 2001. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-12132001-102821/.

Testo completo

Abstract (sommario):

In the present thesis the relaxor properties of the tungsten-bronze ferroelectric material strontium-barium niobate Sr_1-wBa_wNb₂O₆(SBN) are investigated. SBN is a very good experimental realization of the three-dimensional random-field Ising model (3d RFIM). The quenched random fields (RF) originate from charge disorder and can be enhanced by doping with Ce³⁺. They are responsible for the formation of polar nanoclusters in the paraelectric phase. In order to study the critical behavior of SBN, linear birefringence (LB) and second harmonic generation (SHG) have been measured as a function of temperature. Within an Ornstein-Zernike analysis of the LB data the autocorrelation function, <P²>, was determined, whereas the dipolar correlation length was obtained from the SHG data. They suggest that, due to its intrinsic disorder, pure SBN does not belong to the 3d Ising universality class. Doping with Ce³⁺ions, which seem to generate RFs, enhances the relaxor properties. The critical exponents v and y of SBN:Ce shift against those of the 3d RFIM. The domain morphology of SBN:Ce has been investigated by piezoelectric force microscopy (PFM). Fractal-like shaped zero-field cooled nanodomains are observed. Their size distribution can be described by a power law with exponential cutoff in accordance with prediction for the RFIM. It was measured for the first time in a RF system. The temperature and field induced evolution of natural and written domains has been studied with PFM, LB and SHG measurements. It reveals a very slow relaxation from a macrodomain into a depolarized multidomain state (and vice versa) even above T_C. This hints at strong pinning forces due to quenched RFs. They are also responsible for the observed aging in poled SBN and the field induced cluster percolation above T_C measured with SH-hysteresis. The domains can be considered as a "thick" phase grating for SH-diffraction. The Bragg-regime diffraction efficiency reflects the temperature and field induced change of the averaged domain sizes in the system.

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Maie, Hiroki. "Synthesis and dielectric properties of nanocrystalline barium titanate and silver/barium titanate particles". Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1211387100/.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Nabasenja, Caroline. "Radiation doses for barium meals and barium enemas in the Western Cape South Africa". Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1560.

Testo completo

Abstract (sommario):

Thesis submitted in fulfilment of the requirements for the award of the degree of Master of Technology Radiography (Diagnostic) in the Faculty of Health and Wellness Sciences at the Cape Peninsula University of Technology 2009
Since their discovery in 1895, the use of x-rays is continuously evolving in medicine making the diagnosis of injuries and diseases more practicable. It is therefore not surprising that x-rays contribute 90% of the radiation dose to the population from manmade sources (DWP, 1992). Moreover, these radiation doses are associated with both fatal and non-fatal cancer risk that is detrimental to adults between 20 to 60 years (Wall, 1996). Radiation dose to individuals therefore needs to be actively monitored in order to minimise such risk. Barium contrast examinations were characterised as one of the radiological examinations that contributed enormously to the collective dose to the patients in the radiology department (DWP, 1992). Determining the diagnostic reference levels of such examinations would reduce the over-exposure of individuals to ionising radiation. Currently in South Africa (SA), there are no diagnostic dose reference levels for barium meal (BaM) and barium enema (BaE) examinations. This study therefore investigated the radiation doses delivered to patients referred for BaM and BaE, obtained potential regional reference doses for these examinations, compared the radiation doses obtained with those from similar dosimetry studies and investigated sources of dose variation among the study sites. A total of 25 BaM and 30 BaE patients in the age range 18 to 85 years, weighing 50 kg to 90 kg, at 3 hospitals in the Western Cape, SA were investigated. The radiation dose to the patients was measured using Dose Area Product (DAP) meters that were permanently fitted onto fixed fluoroscopy units at these 3 hospitals. The third quartile DAP values were 20.1 Gycm2 and 36.5 Gycm2 for BaM and BaE respectively. The median DAP values were 13.6 Gycm2 and 27.8 Gycm2 for BaM and BaE respectively. The median values were recommended as the potential Diagnostic Reference Levels for BaM and BaE as they are less affected by outlying values of under or over- weight (Yakoumakis, Tsalafoutas, Sandilos, Koulentianos et al, 1999). The weights of the patients, fluoroscopy time, the number of images obtained, the use of digital or conventional fluoroscopy equipment and the level of training of the radiologists were the factors considered for dose variation among the 3 hospitals.

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Jakubek, Zygmunt J. (Zygmunt Jerzy). "Rydberg spectroscopy of barium monofluoride". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32154.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Yang, Yaodong. "Barium Titanate-Based Magnetoelectric Nanocomposites". Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/38666.

Testo completo

Abstract (sommario):

Barium Titanate (BaTiO3 or BTO) has attracted an ever increasing research interest because of its wide range of potential applications. Nano-sized or nanostructured BTO has found applications in new, useful smart devices, such as sensors and piezoelectric devices. Not only limited to one material, multi-layers or multi-phases can lead to multifunctional applications; for example, nanocomposites can be fabricated with ferrite or metal phase with BTO. In this study, I synthesized various BTO-ferrites, ranging from nanoparticles, nanowires to thin films. BTO-ferrite coaxial nanotubes, BTO-ferrite self-assemble thin films, and BTO single phase films were prepared by pulsed laser deposition (PLD) and sol-gel process. BTO-ferrite nanocomposites were grown by solid state reaction. Furthermore, BTO-metal nanostructures were also synthesized by solid state reaction under hydrogen gas which gave us a great inspiration to fabricate metal-ceramic composites. To understand the relationship between metal and BTO ceramic phase, I also deposited BTO film on Au buffered substrates. A metal layer can affect the grain size and orientation in BTO film which can further help us to control the distribution of dielectric properties of BTO films. After obtaining different nanomaterials, I am interested in the applications of these materials. Recently, many interesting electric devices are developed based on nanotechnology, e.g.: memristor. Memristor is a resistor with memory, which is very important in the computer memory. I believe these newly-synthesized BTO based nanostructures are useful for development of memristor, sensors and other devices to fit increasing needs.
Ph. D.

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Libri sul tema "Barium"

1

Harlal, Choudhury, Cary R, World Health Organization, International Labour Organisation, United Nations Environment Programme, International Program on Chemical Safety. e Inter-Organization Programme for the Sound Management of Chemicals., a cura di. Barium and barium compounds. Geneva: World Health Organization, 2001.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Veterans Administration Medical Center (Seattle, Wash.), a cura di. Barium enema. Seattle [Wash.]: Veterans Administration Medical Center, 1985.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Corporation, Syracuse Research, a cura di. Toxicological profile for barium and barium compounds. Atlanta, Ga: Agency for Toxic Substances and Disease Registry, 2007.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Daphne, Moffett, United States. Agency for Toxic Substances and Disease Registry., Syracuse Research Corporation e United States. Environmental Protection Agency., a cura di. Draft toxicological profile for barium and barium compounds. Atlanta, Ga: Agency for Toxic Substances and Disease Registry, 2005.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Kamal, M. Barium enema audit. [Edinburgh]: Scottish Office, 1994.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Cittadini, Giorgio. Double contrast barium enema. Milano: Springer Milan, 1998. http://dx.doi.org/10.1007/978-88-470-2217-1.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

I, Rozovskiy G., e United States. National Aeronautics and Space Administration., a cura di. Electrochemical synthesis of barium cuprate. Washington, DC: National Aeronautics and Space Administration, 1989.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

International Program on Chemical Safety., International Labour Organisation, United Nations Environment Programme e World Health Organization, a cura di. Barium health and safety guide. Geneva: World Health Organization, 1991.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

P, Khanna P., e Bhabha Atomic Research Centre, a cura di. An Inductively coupled plasma atomic emission spectrometry (ICO-AES) method for the determination of barium and strontium in water. Mumbai: Bhabha Atomic Research Centre, 1999.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Lea, David Wallace. Foraminiferal and coralline barium as paleoceanographic tracers. Wood Hole, Mass: Woods Hole Oceanographic Institution, 1989.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Capitoli di libri sul tema "Barium"

1

White, William M. "Barium". In Encyclopedia of Earth Sciences Series, 1–3. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-39193-9_79-1.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

White, William M. "Barium". In Encyclopedia of Earth Sciences Series, 91–93. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-39312-4_79.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Pohling, Rolf. "Barium". In Chemische Reaktionen in der Wasseranalyse, 25–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-36354-2_4.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Bourgeois, Marie M. "Barium". In Hamilton & Hardy's Industrial Toxicology, 57–62. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118834015.ch08.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Gooch, Jan W. "Barium". In Encyclopedic Dictionary of Polymers, 66. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_1058.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Brookins, Douglas G. "Barium". In Eh-pH Diagrams for Geochemistry, 168–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73093-1_60.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Moore, Jame W. "Barium". In Springer Series on Environmental Management, 43–49. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3004-5_5.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Ware, George W. "Barium". In Reviews of Environmental Contamination and Toxicology, 13–23. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4684-7083-3_2.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Madejón, Paula. "Barium". In Environmental Pollution, 507–14. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4470-7_19.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Cittadini, Giorgio. "Barium suspensions". In Double contrast barium enema, 83–90. Milano: Springer Milan, 1998. http://dx.doi.org/10.1007/978-88-470-2217-1_14.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Barium"

1

Middleton, Julia, Adina Paytan e Tristan J. Horner. "Barium-Isotopic Signatures of Barite Diagenesis". In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1796.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Middleton, Julia, Adina Paytan, Mak Saito e Tristan Horner. "Barium Isotope Signatures of Barite Diagenesis". In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.5509.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Fang, Wen-Feng, Chin-Yen Tsai, Chia-Cheng Tseng, Shih-Feng Liu e Meng-Chih Lin. "Acute Barium Intoxication After Accidental Inhalation Of Barium". In American Thoracic Society 2010 International Conference, May 14-19, 2010 • New Orleans. American Thoracic Society, 2010. http://dx.doi.org/10.1164/ajrccm-conference.2010.181.1_meetingabstracts.a6103.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Middleton, Jule, Adina Paytan e Tristan Horner. "Barium isotope fractionation during ion exchange at the barite-fluid interface: Implications for barium cycling in seawater". In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12345.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Doldersum, A., e S. Baraka-Lokmane. "Effect of Water Salinity on Barium Sulfate Formation in the Context of Gas Wells in the Dutch Sector of the North Sea". In SPE Oilfield Scale Symposium. SPE, 2024. http://dx.doi.org/10.2118/218712-ms.

Testo completo

Abstract (sommario):

Abstract Operator has several gas wells which encountered barium sulfate scale. In one instance this had resulted in a complete blockage of the well and in another well not being able to perform a planned well intervention. This paper will present the investigation of the mechanism of formation of scales in combination with an overview of laboratory and field data on how to treat the barium scales. The production water of one of the wells is characterised by a very high salinity level close to saturation in combination with presence of barium, strontium, calcium, carbonate, and sulfate. The evaluation of the scaling risk has been carried out from bottomhole to wellhead with commercial software; 80 points modelling have been performed. This has helped to determine the scaling mechanisms for individual scales. Barium scale from a second well has been used to select an effective dissolvent via laboratory experiments. The evaluation of the scaling risk has been carried out with a help of a commercial software. The predicted scales are halite, barite, celestite, strontianite and calcite, while mainly barite was found in the recovered deposit. The difference between modelling results and field observation are discussed in the paper. As halite concentrations exceeded saturation levels, downhole water injection was applied in one of the wells to stay below the saturation levels, due to water evaporation caused by drawdown. However, the reduction of salinity decreases the solubility of barium sulfate which in combination with decreasing temperatures seriously increases the risk of precipitation of barium sulfate. This eventually resulted in a complete blockage of the well. For the second well, barium scale samples were tested in the laboratory to select the best dissolvent. This dissolvent had been batch injected in the upper part of the well to dissolve the scale. Collected production water at surface immediately after opening of the well, showed increased levels of barium, strontium, and sulfate. Continuous downhole injection of fresh water to compensate for evaporation losses due to drawdown should be carefully evaluated when barium sulfate scaling risk exists as the solubility decreases at lower salinity levels. One of the mitigation methods is therefore to add inhibitors to the injected water.

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Dermine, Tyl, Robert G. Izzard, Alain Jorissen, Ross P. Church, Vicky Kologera e Marc van der Sluys. "Barium Stars Revisited". In INTERNATIONAL CONFERENCE ON BINARIES: In celebration of Ron Webbink’s 65th Birthday. AIP, 2010. http://dx.doi.org/10.1063/1.3536416.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Balintova, Magdalena, Stefan Demcak, Adriana Estokova, Marian Holub e Petra Pavlikova. "Study of Thermal Reduction of Barium Sulphate for Barium Sulphide Preparation". In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.004.

Testo completo

Abstract (sommario):

Industrial wastewaters, particularly those associated with mining and mineral processing, can contain high con-centrations of sulphate. There are various methods of sulphate removal e.g. reverse osmosis, ion exchange, precipitation by lime, cements, and salts of barium and the biological removal process. The soluble salts of barium are most commonly used for precipitation of sulphate from aquatic acidic solutions to the insoluble product barium sulphate BaSO4. Benefits of precip-itation are high sulphate removal efficiency but limitations are toxicity of barium compounds and high economical costs. For this reason the recycling of BaSO4 to barium sulphide BaS (the precipitating reagent) is very important. The paper deals with study of BaSO4 reduction by activated carbon to BaS by thermal analysis and infrared spectrometry. DCS analysis indicated that conversion of BaSO4 to BaS in the range of temperature 800–1,000 °C was performed. Thermal analysis and infrared spectra of the products confirmed the change in its composition, but process of reduction by carbon was incomplete and in sample was still present a part of BaSO4. Presence of BaS was confirmed by colorimetric method.

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Khalil, M. S., e F. O. Henk. "Effect of Barium Titanate". In Conference Record of the 1996 IEEE International Symposium on Electrical Insulation. IEEE, 1996. http://dx.doi.org/10.1109/elinsl.1996.549430.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Teng, Ye Y., e Chuen Wong. "Photorefractive crystals: barium titanate". In Beijing - DL tentative, a cura di Sui-Sheng Mei e Bingkun Zhou. SPIE, 1993. http://dx.doi.org/10.1117/12.144091.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

McGinty, Jim, Thomas E. McHugh e Elaine A. Higgins. "Barium Sulfate: A Protocol for Determining Higher Site-Specific Barium Cleanup Levels". In E&P Environmental and Safety Conference. Society of Petroleum Engineers, 2007. http://dx.doi.org/10.2118/106802-ms.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Rapporti di organizzazioni sul tema "Barium"

1

Tang, C. L. Beta-Barium Borate Optical Parametric Oscillator. Fort Belvoir, VA: Defense Technical Information Center, agosto 1991. http://dx.doi.org/10.21236/ada251177.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Brost, George A. Enhanced Photorefractive Effects in Barium Titanate. Fort Belvoir, VA: Defense Technical Information Center, dicembre 1992. http://dx.doi.org/10.21236/ada264724.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Fang, Yue-Wen, e Ion Errea. The superconductivity in doped barium superhydrides. Peeref, maggio 2023. http://dx.doi.org/10.54985/peeref.2305p9000120.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Turner, R. J. W., e W. D. Goodfellow. Barium Carbonate Bodies Associated With the Walt [Cathy] Stratiform Barium Deposit, Selwyn Basin, Yukon: a Possible Vent Complex Associated With a Middle Devonian Sedimentary Exhalative Barite Deposit. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/131402.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Stevens, Tyler E., Christopher Brian DiAntonio, Pin Yang, Tom P. Chavez, Michael R. Winter, Todd C. Monson, Alexander William Roesler e Benjamin D. Fellows. Barium titanate nanocomposite capacitor FY09 year end report. Office of Scientific and Technical Information (OSTI), novembre 2009. http://dx.doi.org/10.2172/976944.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Heid, Christy A., Brian P. Ketchel, Gary L. Wood, Richard J. Anderson e Gregory J. Salamo. 3-D Holographic Display Using Strontium Barium Niobate. Fort Belvoir, VA: Defense Technical Information Center, febbraio 1998. http://dx.doi.org/10.21236/ada338490.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Luke, J. R., e M. S. El-Genk. A transient model of a cesium-barium diode. Office of Scientific and Technical Information (OSTI), gennaio 1995. http://dx.doi.org/10.2172/538071.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Dawson, K. R. Mineral Deposit Map, Barium, Strontium and Fluorine in Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120332.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Dawson, K. R. Geology of barium, strontium, and fluorine deposits in Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120333.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Falkner, Kelly K. Development of a Fluorescence-Based in-situ Barium Sensor. Fort Belvoir, VA: Defense Technical Information Center, ottobre 1999. http://dx.doi.org/10.21236/ada375880.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!