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Dissertations / Theses on the topic 'Boron'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Brain, Paul Terence. "Studies of some compounds containing boron-boron bonds." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291091.

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2

Zhu, Xiaojing. "Processability of Nickel-Boron Nanolayer Coated Boron Carbide." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28633.

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This dissertation work focuses on the processability improvement of B4C, especially the compaction and sintering improvement of B4C by applying a Ni-B nanolayer coating on individual B4C particles. A modified electroless coating procedure was proposed and employed to coat nanometer Ni-B layer onto micron-sized B4C particles. The thickness was able to be tuned and controlled below 100 nm. Key parameters, including the amount of nickel source, the amount of the surface activation agent (PdCl2), the amount of the complexing agent (C2H8N2), and the addition rate of the reducing agent (NaBH4) were

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3

DeGraffenreid, Allison Lynne. "Studies on boron - nitrogen and boron - gadolinium compounds." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1294835746.

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4

Slade, Alexander Mason Electrical Engineering UNSW. "Boron tribromide sourced boron diffusions for silicon solar cells." Awarded by:University of New South Wales. Electrical Engineering, 2005. http://handle.unsw.edu.au/1959.4/21850.

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This thesis undertakes the development, characterization and optimization of boron diffusion for silicon solar cells. Heavy diffusions (sheet resistance < 40 Ohm/square) to form a back surface field, and light diffusions (sheet resistance > 100 Ohm/square) to form oxide-passivated emitters were developed. Test structures and solar cells were fabricated to assess uniformity, lifetime and recombination effects due to the light and heavy boron diffusions. It was found that the growth of a thin ~200 ??, thermal oxide, during stabilization ??? immediately prior to the boron diffusion - was requir

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5

Yamamoto, Akihiko. "Boron-based organic reactions using boron cyanides and chlorides." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/143990.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第12293号<br>工博第2622号<br>新制||工||1370(附属図書館)<br>24129<br>UT51-2006-N978<br>京都大学大学院工学研究科合成・生物化学専攻<br>(主査)教授杉野目道紀, 教授檜山爲次郎, 教授村上正浩<br>学位規則第4条第1項該当

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6

Spivack, Arthur J. "Boron isotope geochemistry." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/15187.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and Woods Hole Oceanographic Institution, 1986.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN<br>Vita.<br>Includes bibliographies.<br>by Arthur J. Spivack.<br>Ph.D.

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7

Castro, Susana Patricia. "CHARACTERIZATION OF THE BORON DOPING PROCESSUSING BORON NITRIDE SOLID SOURCE DIFFUSION." NCSU, 1999. http://www.lib.ncsu.edu/theses/available/etd-19990523-142337.

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<p>CASTRO, SUSANA PATRICIA. Characterization of the Boron Doping Process UsingBoron Nitride Solid Source DiffusionThe purpose of this research has been to develop an optimum process for the borondoping of implants and polysilicon gates of metal-oxide-semiconductor (MOS) devices.An experimental design was constructed to determine the effects of diffusiontemperature, time, and ambient on characteristics of the doping process. A temperaturerange of 800 to 1000 degrees Celsius was studied with a diffusion time between 10 and60 minutes. Two diffusion ambients were used for doping processes, a pure

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8

Leenhouts, James Merrell 1968. "Behavior of boron and boron isotopes during uptake by Atriplex canescens." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284177.

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This research was conducted to determine the potential for using plants to obtain samples of boron isotopes from groundwater, sod moisture and fracture water. In essence, this work sought to ascertain whether plants can function as in-situ samplers for boron as an environmental isotope. At present, very little is known about the behavior of boron isotopes in plants so this study was designed to reveal any isotopic fractionation that might occur during plant uptake by a specific species under carefully controlled conditions. The relationship between the boron isotope ratios sequestered in the l

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9

Noguchi, Hiroyoshi. "Boron-based organic synthesis through reactivity control by substituents on boron." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136275.

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10

Chung, Yoonsun. "Radiobiological evaluation of new boron delivery agents for boron neutron capture therapy." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44784.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2008.<br>Includes bibliographical references (p. 123-132).<br>This thesis evaluates the radiobiological effectiveness of three new boron compounds namely a boronated porphyrin (BOPP) and two liposome formulations for neutron capture therapy (BNCT). The methodology utilizes in vitro and in vivo comparisons that characterize compounds relative to boric acid and boronophenylalanine (BPA). In vitro evaluations utilized a colorimetric assay and 96-well plates to minimize the quantities of compound requ

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11

Castro, Susana Patricia. "Characterization of the boron doping process using boron nitride solid source diffusion." Raleigh, NC : North Carolina State University, 1999. http://www.lib.ncsu.edu/etd/public/etd-2923142349901421/etd.pdf.

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12

Cui, Jian. "Synthesis and characterization of new boron-nitrogen and boron-nitrogen-phosphorus systems." [Fort Worth, Tex.] : Texas Christian University, 2009. http://etd.tcu.edu/etdfiles/available/etd-03162010-123538/unrestricted/Cui.pdf.

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13

Ceberg, Crister. "Pharmacokinetics and biodistribution of boron compounds foundations for boron neutron capture theory /." Lund : Dept. of Radiation Physics, Lund University, 1994. http://books.google.com/books?id=wnhrAAAAMAAJ.

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14

Asad, Adil. "External and internal boron requirements of plants using boron buffered solution culture." Thesis, Asad, Adil (1998) External and internal boron requirements of plants using boron buffered solution culture. PhD thesis, Murdoch University, 1998. https://researchrepository.murdoch.edu.au/id/eprint/52442/.

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In soils and in conventional nutrient solutions, establishing the internal and external boron (B) requirements of plants is often confounded because the external B concentration changes during plant growth. On the other hand, the major problem of working with low B concentrations in conventional nutrient solutions is that these concentrations are quickly depleted as B is taken up by the plant roots. Hence in most conventional solution cultures, the initial B concentration is often very high to ensure adequate supply of B throughout an experiment. This research was carried out to develop a solu

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15

Cho, Namtae. "Processing of Boron Carbide." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11567.

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The processing of boron carbide powder including sintering optimization, green body optimization and sintering behavior of nano-sized boron carbide was investigated for the development of complex shaped body armor. Pressureless sintered B4C relative densities as high as 96.7% were obtained by optimizing the soak temperature, and holding at that temperature for the minimum time required to reach terminal density. Although the relative densities of pressureless sintered specimens were lower than that of commercially produced hot-pressed B4C, their (Vickers) hardness values were comparable. For

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16

Ozkol, Engin. "Production Of Boron Nitride." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609646/index.pdf.

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Boron nitride is found mainly in two crystal structures<br>in hexagonal structure (h-BN) which is very much like graphite and in cubic structure (c-BN) with properties very close to those of diamond. h-BN is a natural lubricant due to its layered structure. It is generally used in sliding parts of the moving elements such as rotating element beds in turbine shafts. Since c-BN is the hardest known material after diamond it is used in making hard metal covers. In addition to its possible microelectronics applications (can be used to make p-n junction), its resistance to high temperatures and it

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17

Smil, David V. "Boron tethered radical cyclizations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0006/MQ40735.pdf.

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18

Lee, Hyukjae. "Sintering of boron carbide." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/19631.

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19

Keep, Ann Kathleen. "Ruthenium boron cluster chemistry." Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/272941.

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20

Böhlke, Steffen. "Untersuchungen zur Borflüchtigkeit bei der Einspeisung von Bor in SWR-Brennelemente bei transienten Kernzuständen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-37939.

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In Siedewasserreaktoren ist ein Boreinspeisesystem diversitär wirkend zur Reaktorschnellabschaltung installiert. Dieses System garantiert, dass der Reaktor beim Versagen des Schnellabschaltesystems in einen unterkritischen Zustand überführt werden kann. Der aufgrund der Nachzerfallsleistung entweichende Dampf trägt jedoch ständig einen Teil des eingespeisten Bors in Form von Borsäure mit sich. Da dieser Prozess bisher nicht quantifiziert wurde, ist somit das Eintreten einer Rekrititkalität während der Transiente ohne weitere Untersuchungen nicht auszuschließen. In der vorliegenden Arbeit erfol

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21

Nguyen, Thi Thu Hien. "Study of new exchangers for boron removal from water containing high concentration of boron." Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0138/document.

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Le bore est nécessaire pour le développement des plantes supérieures (structuration de la paroi végétale). Il pose cependant des problèmes (défoliation, pourriture et chute des fruits mûrs). Pour l’homme, sa toxicité se traduit par des nausées, des diarrhées, des troubles du développement intellectuel, neurologique et physique. La pénurie en eau douce conduit à dessaler l’eau de mer pour augmenter la quantité en eau destinée à la consommation humaine, l’industrie et l’agriculture. Lors de ce procédé, il faut éliminer les ions majeurs mais aussi le bore présent à des concentrations élevées (&gt

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22

Bin, Darwish Nawaf Naif. "Boron removal from saline water." Thesis, Swansea University, 2014. https://cronfa.swan.ac.uk/Record/cronfa42237.

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Although boron is an essential micronutrient for some plants, animals and humans, the range between deficiency and excess is narrow. The effects of excess boron on plants includes the reduction of root cell division, retarded shoot and root growth, inhibition of photosynthesis, deposition of lignin and suberin and decrease in leaf chlorophyll. A report by the World Health Organization (WHO) suggests a safe maximum level of boron daily intake of 13 mg/d an excessive level of boron can be toxic to and can causes serious diseases. There are several methods applied for boron removal from aqueous s

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23

Music, Denis. "Boron suboxide based thin films /." Linköping : Univ, 2003. http://www.bibl.liu.se/liupubl/disp/disp2003/tek835s.pdf.

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24

Alharbi, Abdulaziz. "Deformation of hexagonal boron nitride." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/deformation-of-hexagonal-boron-nitride(6c6013c4-8c17-4dec-b250-ed3f0baea7ed).html.

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Boron nitride (BN) materials have unique properties, which has led to interest in them in the last few years. The deformation of boron nitride materials including hexagonal boron nitride, boron nitride nanosheets (BNNSs) and boron nitride nanotubes have been studied by Raman spectroscopy. Both mechanical and liquid exfoliations were employed to obtain boron nitride nanostructures. Boron nitride glass composites were synthesised and prepared in thin films to be deformed by bending test in-situ Raman spectroscopy. Hexagonal boron nitride in the form of an individual flake and as flakes dispersed

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25

Taher, Mamoun. "Novel boron compounds in lubrication." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25920.

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Lubricants are used to control friction and reduce wear by preventing direct contact between surfaces in a relative motion. Most of the modern lubricants and lubricant additives have been designed and optimized for ferrous materials. A growing trend towards wider use of lightweight and wear resistant non-ferrous materials calls for new efficient and environmentally friendly Lubricants. Boron compounds are attractive alternatives for the commercially available lubricants and lubricant additives. Some boron compounds have already been proven as efficient friction modifiers, antioxidants, corrosi

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26

Cherednichenko, Kirill. "Boron chalcogenides under extreme conditions." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066602/document.

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Cette thèse porte sur l'étude des chalcogénures de bore sous conditions extrêmes. Après un bref examen de la littérature (Chapitre I) sur le bore et ses composés sous haute pression (HP), la partie expérimentale (Chapitre II) donne une description des appareils HP utilisés dans ce travail de thèse. Les techniques d'analyses employées sont décrites ainsi que les grands principes des calculs théoriques ab initio utilisés. La partie suivante est consacrée à β-B2O3 et r-BS. Le chapitre III présente les résultats de diffraction X in situ à HP et les mesures de phonons (Raman et IR) de β-B2O3 à temp

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27

Cherednichenko, Kirill. "Boron chalcogenides under extreme conditions." Electronic Thesis or Diss., Paris 6, 2015. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2015PA066602.pdf.

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Cette thèse porte sur l'étude des chalcogénures de bore sous conditions extrêmes. Après un bref examen de la littérature (Chapitre I) sur le bore et ses composés sous haute pression (HP), la partie expérimentale (Chapitre II) donne une description des appareils HP utilisés dans ce travail de thèse. Les techniques d'analyses employées sont décrites ainsi que les grands principes des calculs théoriques ab initio utilisés. La partie suivante est consacrée à β-B2O3 et r-BS. Le chapitre III présente les résultats de diffraction X in situ à HP et les mesures de phonons (Raman et IR) de β-B2O3 à temp

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28

Rockett, Chris H. "Flexural Testing of Molybdenum-Silicon-Boron Alloys Reacted from Molybdenum, Silicon Nitride, and Boron Nitride." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16293.

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MoSiB alloys show promise as the next-generation turbine blade material due to their high-temperature strength and oxidation resistance afforded by a protective borosilicate surface layer. Powder processing and reactive synthesis of these alloys has proven to be a viable method and offers several advantages over conventional melt processing routes. Microstructures obtained have well-dispersed intermetallics in a continuous matrix of molybdenum solid-solution (Mo-ss). However, bend testing of pure Mo and Mo-ss samples has shown that, while the powder processing route can produce ductile Mo meta

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29

Pilli, Aparna. "Atomic Layer Deposition of Boron Oxide and Boron Nitride for Ultrashallow Doping and Capping Applications." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1752373/.

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The deposition of boron oxide (B₂O₃) films on silicon substrates is of significant interest in microelectronics for ultrashallow doping applications. However, thickness control and conformality of such films has been an issue in high aspect ratio 3D structures which have long replaced traditional planar transistor architectures. B₂O₃ films are also unstable in atmosphere, requiring a suitable capping barrier for passivation. The growth of continuous, stoichiometric B₂O₃ and boron nitride (BN) films has been demonstrated in this dissertation using Atomic Layer Deposition (ALD) and enhanced ALD

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30

Stangoulis, James Constantine Roy. "Genotypic variation in oilseed rape to low boron nutrition and the mechanism of boron efficiency." Title page, contents and summary only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phs7856.pdf.

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Bibliography: leaves 132-159. Boron efficiency in oilseed rape (Brassica napua L. and B. juncea L.) was investigated in a wide range of genotypes. Using a solution culture screening of 10 day old seedlings, root length best described shoot growth response, and was used to characterise a total of 65 genotypes. Varieties and breeders lines tolerant of B-deficient growing conditions were identified, and the screening process validated through field trials. B responses in plants sampled at the 'green bud' stage indicated that vegetative growth is important in B efficiency. Studies were conducted

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31

Oz, Tufan M. "Microarray Based Expression Profiling Of Barley Under Boron Stress And Cloning Of 3h Boron Tolerance Gene." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614203/index.pdf.

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Both deficiency and toxicity of the essential micronutrient boron (B) lead to reduced crop yield in agriculture. However, our understanding of the molecular responses of plants under B stresses to tackle the yield loss is limited. Therefore, in the present study, transcriptional alterations in sensitive and tolerant barley cultivars under B deficiency and toxicity were investigated in order to reveal the molecular responses. Transcriptomes were monitored at seedling stage by global expression profiling using oligonucleotide microarrays. In the context of the study, we have determined that res

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32

Noyan, Selin. "Production Of Boron Nitride Nanotubes From The Reaction Of Nh3 With Boron And Iron Powder Mixture." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615045/index.pdf.

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Boron nitride nanotubes (BNNTs), which are structurally similar to carbon nanotubes (CNTs), were synthesized in 1995 for the first time. They are made up by folding atom sheets which consist of boron and nitrogen atoms into cylindrical form. After their discovery, BNNTs have been attracting great attention due to their extraordinary mechanical, thermal, electrical, and optical properties. In this study, BNNTs were synthesized from the reaction of ammonia gas with the boron and iron powder mixture in a tubular reactor which was connected to a mass spectrometer for on-line chemical analysis of

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33

Yoshii, Ryosuke. "Synthesis of Highly-Functional Polymers Using Characteristics of Four-Coordinated Boron-Complexes with Boron-Nitrogen Bonds." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188610.

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34

Binello, Emanuela. "In vitro analysis of boron-10 uptake and neutron beam design for boron neutron capture synovectomy." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38394.

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35

Bagheri, Kazemabad Abdolreza. "Boron tolerance in grain legumes with particular reference to the genetics of boron tolerance in peas." Title page, summary and contents only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phb144.pdf.

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36

Gao, Wei. "Crystal growth of alpha-rhombohedral boron." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4171.

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37

Shupe, John. "Densification of nano-sized boron carbide." Thesis, Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33818.

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Boron carbide nano-powders, singly-doped over a range of compositions, were pressurelessly-sintered at identical temperature and atmospheric conditions in a dif- ferential dilatometer to investigate sintering behavior. Samples that achieved relative densities greater than 93% of theoretical density were post-HIPed. Post-HIPing re- sulted in an increase in relative density as well as an increase in Vicker's hardness. To optimize the sintering behavior, nano-powders with multiple dopants were prepared based on the results of single dopant experiments. These powders were studied using the same he

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38

Camurlu, Hasan Erdem. "Carbothermic Production Of Hexagonal Boron Nitride." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607808/index.pdf.

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Formation of hexagonal boron nitride (h-BN) by carbothermic reduction of B2O3 under nitrogen atmosphere at 1500oC was investigated. Reaction products were subjected to powder X-ray diffraction analysis, chemical analysis and were examined by SEM. B4C was found to exist in the reaction products of the experiments in which h-BN formation was not complete. One of the aims of this study was to investigate the role of B4C in the carbothermic production of h-BN. For this purpose, conversion reaction of B4C into h-BN was studied. B4C used in these experiments was produced in the same conditions that

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39

Karaman, Mustafa. "Chemical Vapor Deposition Of Boron Carbide." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608778/index.pdf.

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Boron carbide was produced on tungsten substrate in a dual impinging-jet CVD reactor from a gas mixture of BCl3, CH4, and H2. The experimental setup was designed to minimise the effect of mass transfer on reaction kinetics, which, together with the on-line analysis of the reactor effluent by FTIR, allowed a detailed kinetic investigation possible. The phase and morphology studies of the products were made by XPS, XRD,micro hardness and SEM methods. XPS analysis showed the existence of chemical states attributed to the boron carbide phase, together with the existence of oxy-boron carbide speci

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40

Hao, Wenjun. "Atomic layer deposition of boron nitride." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1311/document.

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Cette thèse conclut 3 années d'études doctorales sur le "dépôt de couches atomiques (ALD) de nitrure de bore (BN)". Le but de ce travail a été d'adapter la voie des céramiques dérivées de polymères (PDC) Ã la technique ALD pour la croissance de films minces de h-BN et l'élaboration de nanostructures fonctionnelles. Tout d'abord, un nouveau procédé d'ALD sans ammoniac en deux étapes, comprenant une croissance par ALD à basse température (80 Â°C) de polyborazine (PBN) à partir de 2,4,6-trichloroborazine et d'hexaméthyldisilazane suivi un traitement thermique à haute température sous atmosphère c

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41

Williams, Lynda B. "Boron isotope geochemistry during burial diagenesis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0022/NQ49549.pdf.

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42

Wade, Bruce Edward. "Boron nitride fibers from polymer precursors." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/10035.

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43

Kelland, Malcolm. "Organo-transition metal boron hydride chemistry." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258164.

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44

Vianez, Basilio Frasco. "Aspects of boron diffusion through hardwoods." Thesis, Bangor University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358298.

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45

Donnelly, David J. "The determination of boron in steels." Thesis, University of Wolverhampton, 1987. http://hdl.handle.net/2436/111547.

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46

Adey, James. "Boron related point defects in silicon." Thesis, University of Exeter, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407270.

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47

Patel, Hemant. "Boron-10 uptake in experimental gliomas." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266375.

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48

Man, H. C. "Laser glazing of iron boron alloys." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37771.

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49

Sabatini, Marco. "Synthesis of amides using boron catalysts." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10045230/.

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The thesis describes the research conducted towards the development of more sustainable methods for amide bond formation. The first chapter describes the importance of amide bond formation and the methods currently used for this type of transformation. Crucially, current methodologies defy in many aspects the 12 principles of green chemistry and are thus not sustainable. The subsequent chapters describe the work conducted directed at addressing problems with the current state of the art of amide bond formation. The development of a novel catalytic method for direct amidation of carboxylic acid

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50

Howard, William Bruce. "Accelerator-based boron neutron capture therapy." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/44479.

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