Academic literature on the topic 'HYD'

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Journal articles on the topic "HYD"

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Katsigiannis, Georgios, Pedro Ferreira, and Raul Fuentes. "HYD verifications using numerical methods." Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards 12, no. 1 (January 18, 2017): 45–59. http://dx.doi.org/10.1080/17499518.2016.1269182.

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Rezende, L. R., E. F. Delgado, A. R. L. Júnior, G. Gasparin, E. C. Jorge, G. B. Mourão, and L. L. Coutinho. "Expression of 1alpha-HYD and 24-HYD in bovine kidney mediated by vitamin D3 supplementation." Genetics and Molecular Research 12, no. 4 (2013): 6611–18. http://dx.doi.org/10.4238/2013.december.11.12.

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San Miguel Pérez, Enrique. "David Lloyd George, Yma O Hyd." IHERING. CUADERNOS DE CIENCIAS JURÍDICAS Y SOCIALES, no. 1 (December 14, 2018): 201–15. http://dx.doi.org/10.51743/ihering.12.

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Hemos ganado la guerra, y hemos salvado el imperio". Y en efecto, fue así como un galés, educado en galés, fundó una "democracia imperial". E incluso, diría Gwyn Alf Williams, un "Gales imperial". Porque David Lloyd George, seguramente el más grande galés de la historia (con el permiso de Dylan Thomas, Richard Burton, Gareth Edwards y, por supuesto, "Harry, el rey") nació, al contrario que todos sus compatriotas rivales por la grandeza, en Inglaterra, y en plena Era victoriana
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Галимова, Ю. А., Н. В. Дорогова, and С. А. Фёдорова. "Функции Е3 убиквитин-лигазы Hyd в тканях дрозофилы." Молекулярная биология 55, no. 3 (2021): 355–61. http://dx.doi.org/10.31857/s002689842103006x.

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Wang, Kun, Jun Guan, De Min He, and Qiu Min Zhang. "The Influences of Reaction Conditions on Phenanthrene Hydrogenation over NiW/Al2O3 Catalyst." Advanced Materials Research 512-515 (May 2012): 2200–2206. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2200.

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Hydrogenation of phenanthrene (PHE HYD) was investigated over a commercial NiW/Al2O3catalyst under practical reaction conditions. GC-MS analysis was utilized to identify the numerous products formed during PHE HYD. The products included dihydrophenanthrene (DHP), 1,2,3,4-tetrahydrophenanthrene (THP), sym-octahydrophenanthrene (1,8-OHP), asym-octahydrophenanthrene (1,10-OHP) and perhydrophenanthrene (PHP), but the cracking products were not found under the reaction conditions. The effects of operating conditions such as temperature, pressure and H2/liquor on PHE HYD were tested in detail. It is found that temperature and pressure had remarkable effect on PHE HYD, but volume ratio of H2/liquor had little effect on PHE HYD at the observation range. The addition of decalin had a positive impact on PHE HYD; it could increase the conversion of PHE and the selectivity to PHP.
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Thomas, Claudia, Mandy Waclawek, Kerstin Nutschan, Constanze Pinske, and R. Gary Sawers. "The Extended C-Terminal α-Helix of the HypC Chaperone Restricts Recognition of Large Subunit Precursors by the Hyp-Scaffold Machinery during [NiFe]-Hydrogenase Maturation in Escherichia coli." Journal of Molecular Microbiology and Biotechnology 28, no. 2 (2018): 87–97. http://dx.doi.org/10.1159/000489929.

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Members of the HypC protein family are chaperone-like proteins that play a central role in the maturation of [NiFe]-hydrogenases (Hyd). <i>Escherichia coli</i> has a second copy of HypC, called HybG, and, as a component of the HypDEF maturation scaffold, these proteins help synthesize the NiFe-cofactor and guide the scaffold to its designated hydrogenase large subunit precursor. HypC is required to synthesize active Hyd-1 and Hyd-3, while HybG facilitates Hyd-2 and Hyd-1 synthesis. To identify determinants on HypC that allow it to discriminate against Hyd-2, we made amino acid exchanges in 3 variable regions, termed VR1, VR2, and VR3, of HypC, that make it more similar to HybG. Region VR3 includes a HypC-specific C-terminal α-helical extension, and this proved particularly important in preventing the maturation of Hyd-2 by HypC. Truncation of this extension on HypC increased Hyd-2 activity in the absence of HybG, while retaining maturation of Hyd-3 and Hyd-1. Combining this truncation with amino acid exchanges in VR1 and VR2 of HypC negatively affected the synthesis of active Hyd-1. The C-terminus of <i>E. coli</i> HypC is thus a key determinant in hindering Hyd-2 maturation, while VR1 and VR2 appear more important for Hyd-1 matu­ration.
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KOTO, Masao, Masao MIWA, Akira SHIMIZU, Ko-ichiro TSUJI, Michio OKAMOTO, and Jiro ADACHI. "Inherited Hydrocephalus in Csk: Wistar-Imamichi Rats; Hyd Strain: a New Disease Model for Hydrocephalus." Experimental Animals 36, no. 2 (1987): 157–62. http://dx.doi.org/10.1538/expanim1978.36.2_157.

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Pinske, Constanze, Monique Jaroschinsky, Sabine Linek, Ciarán L. Kelly, Frank Sargent, and R. Gary Sawers. "Physiology and Bioenergetics of [NiFe]-Hydrogenase 2-Catalyzed H2-Consuming and H2-Producing Reactions in Escherichia coli." Journal of Bacteriology 197, no. 2 (November 3, 2014): 296–306. http://dx.doi.org/10.1128/jb.02335-14.

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Escherichia coliuptake hydrogenase 2 (Hyd-2) catalyzes the reversible oxidation of H2to protons and electrons. Hyd-2 synthesis is strongly upregulated during growth on glycerol or on glycerol-fumarate. Membrane-associated Hyd-2 is an unusual heterotetrameric [NiFe]-hydrogenase that lacks a typical cytochromebmembrane anchor subunit, which transfers electrons to the quinone pool. Instead, Hyd-2 has an additional electron transfer subunit, termed HybA, with four predicted iron-sulfur clusters. Here, we examined the physiological role of the HybA subunit. During respiratory growth with glycerol and fumarate, Hyd-2 used menaquinone/demethylmenaquinone (MQ/DMQ) to couple hydrogen oxidation to fumarate reduction. HybA was essential for electron transfer from Hyd-2 to MQ/DMQ. H2evolution catalyzed by Hyd-2 during fermentation of glycerol in the presence of Casamino Acids or in a fumarate reductase-negative strain growing with glycerol-fumarate was also shown to be dependent on both HybA and MQ/DMQ. The uncoupler carbonyl cyanidem-chlorophenylhydrazone (CCCP) inhibited Hyd-2-dependent H2evolution from glycerol, indicating the requirement for a proton gradient. In contrast, CCCP failed to inhibit H2-coupled fumarate reduction. Although a Hyd-2 enzyme lacking HybA could not catalyze Hyd-2-dependent H2oxidation or H2evolution in whole cells, reversible H2-dependent reduction of viologen dyes still occurred. Finally, hydrogen-dependent dye reduction by Hyd-2 was reversibly inhibited in extracts derived from cells grown in H2evolution mode. Our findings suggest that Hyd-2 switches between H2-consuming and H2-producing modes in response to the redox status of the quinone pool. Hyd-2-dependent H2evolution from glycerol requires reverse electron transport.
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Blbulyan, Syuzanna, Arev Avagyan, Anna Poladyan, and Armen Trchounian. "Role of different Escherichia coli hydrogenases in H+ efflux and F1Fo-ATPase activity during glycerol fermentation at different pH values." Bioscience Reports 31, no. 3 (January 14, 2011): 179–84. http://dx.doi.org/10.1042/bsr20100053.

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Escherichia coli is able to ferment glycerol and produce H2 by different Hyds (hydrogenases). Wild-type whole cells were shown to extrude H+ through the F1Fo-ATPase and by other means with a lower rate compared with that under glucose fermentation. At pH 7.5, H+ efflux was stimulated in fhlA mutant (with defective transcriptional activator of Hyd-3 or Hyd-4) and was lowered in hyaB or hybC mutants (with defective Hyd-1 or Hyd-2) and hyaB hybC double mutant; DCCD (dicyclohexylcarbodi-imide)-sensitive H+ efflux was observed. At pH 5.5, H+ efflux in wild-type was lower compared with that at pH 7.5; it was increased in fhlA mutant and absent in hyaB hybC mutant. Membrane vesicle ATPase activity was lower in wild-type glycerol-fermented cells at pH 7.5 compared with that in glucose-fermented cells; 100 mM K+ did not stimulate ATPase activity. The latter at pH 7.5, compared with that in wild–type, was lower in hyaB and less in hybC mutants, stimulated in the hyaB hybC mutant and suppressed in the fhlA mutant; DCCD inhibited ATPase activity. At pH 5.5, the ATPase activities of hyaB and hybC mutants had similar values and were higher compared with that in wild-type; ATPase activity was suppressed in hyaB hybC and fhlA mutants. The results indicate that during glycerol fermentation, H+ was expelled also via F1Fo. At pH 7.5 Hyd-1 and Hyd-2 but not FhlA or Hyd-4 might be related to F1Fo or have their own H+-translocating ability. At pH 5.5, both Hyd-1 and Hyd-2 more than F1Fo might be involved in H+ efflux.
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Vasudha Rani, Vaddadi, and K. Sandhya Rani. "Analyzing the Popularity of A City (Hyd) Through Twitter Data." International Journal of Computer Trends and Technology 60, no. 1 (June 25, 2018): 53–56. http://dx.doi.org/10.14445/22312803/ijctt-v60p108.

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Dissertations / Theses on the topic "HYD"

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Watkins, Nia Angharad. "Y ddelwedd o'r aelwyd yn y nofel Gymraeg o 1960 hyd at 2008." Thesis, Aberystwyth University, 2011. http://hdl.handle.net/2160/f286a126-dbc2-4f03-8d58-843ef88e4a8b.

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Eir ati yn y traethawd hwn i ymdrin â delwedd yr aelwyd yn y nofel Gymraeg o 1960 hyd at 2008 trwy gyfrwng ymdriniaeth thematig. Yn y bennod gyntaf, amlinellir nodweddion o gefnlen gymdeithasol yr ugeinfed ganrif a oedd yn gatalyddion i’r aelwyd hanesyddol, ac i ddarlun yr aelwyd ffuglennol. Yn yr ail bennod, edrychir ar ddarlun delfrydol yr ‘aelwyd draddodiadol Gymreig’ mewn llenyddiaeth ar ddechrau’r ugeinfed ganrif. Yn ail ran y bennod, ystyrir i ba raddau yr arddelir y darlun o’r ‘aelwyd draddodiadol Gymreig’ mewn testunau a gyhoeddwyd rhwng 1930 a 1960. Yn y drydedd bennod, dechreuir ar y brif astudiaeth gan roi sylw i’r aelwyd argyfyngus. Ymdrinnir â delwedd yr aelwyd mewn nofelau a gyhoeddwyd yn ystod y chwedegau a’r saithdegau lle gwelir newidiadau cymdeithasol pellgyrhaeddol y blynyddoedd hynny ynghyd â’r chwyldro rhywiol yn gefnlen amlwg i’r nofelau. Yn y bedwaredd bennod, eir ati i ymdrin ag aelwyd plentyndod. Gan ganolbwyntio ar nofelau lle defnyddir llif meddwl y plentyn fel naratif, dehonglir y ddelwedd a roddir o’r aelwyd gan y plentyn ei hun. Sonnir am y plentyn fel traethydd eironig wrth iddo ddatgelu gwybodaeth am yr aelwyd nad yw’n deall ei harwyddocâd. Yn y bumed bennod, ceir ymdriniaeth gymharol ag aelwyd y wlad ac aelwyd y ddinas. Dehonglir yr aelwydydd yng ngolau traddodiad a Chymreictod ar y naill law, a modernrwydd a Seisnigrwydd ar y llall. Amlygir yr aelwyd wledig fel alltud i’r newidiadau cymdeithasol a effeithiodd ar ffyniant proffesiynol y ferch, a’r aelwyd ddinesig fel un a’u croesawodd. Yn y chweched bennod, eir ati i ymdrin â’r aelwyd amgen (gwahanol/alternative). Ceir yma aelwyd ffuglennol sy’n gwyro oddi wrth yr hyn a ystyrir yn gonfensiwn. Caiff cysyniad traddodiadol yr aelwyd ei herio, a gofynnir: a oes rhaid wrth adeilad er mwyn creu aelwyd?
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Bustamante, Vásquez Luz Araceli. "Propuesta de rediseño organizacional para la Empresa Hyd Contrucciones en general E.I.R.L., año 2014." Bachelor's thesis, Universidad Católica Santo Toribio de Mogrovejo, 2016. http://tesis.usat.edu.pe/handle/usat/735.

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El objetivo de la investigación fue Proponer un rediseño organizacional para la Empresa H y D Construcciones en General E.I.R.L en el año 2014-2015. El tipo y diseño de la investigación es cualitativa y descriptiva respectivamente; por lo que el instrumento a aplicar en el presente estudio es la entrevista. Por lo que se obtuvo como resultado: que la empresa H y D carece de organigramas formales que muestren gráficamente los diferentes niveles de autoridad, los canales formales de comunicación, las líneas de autoridad y responsabilidad, se tiene como consecuencia que los empleados no se ubiquen jerárquicamente, lo que da como resultado la dualidad de funciones y mando. Por otro lado no existe un manual de organización y funciones formal. Actualmemte se cuenta con 48 trabajadores, los cuales se desempeñan en diferentes puestos de trabajo. Las funciones de la gerencia general, son en base a declaraciones vertidas en la entrevista aplicada, pero no de manera formal definitiva; las funciones de los trabajadores dentro de H y D son: supervisar, controlar, dirigir y organizar la obra asignada, sin embargo también coordinan avances de obra con la supervisión de la obra la cual, tienen que dar cuentas de los avances de acuerdo al plano oficial. Finalmente se concluye que en la empresa Constructora H y D Construcciones en General E.I.R.L los trabajadores perciben desorden administrativo y ausencia de gestión por procesos y tiene pocos competidores en el mercado de instalaciones de redes contraincendios; motivo por el cual se pueden generar nuevas innovaciones en este mercado.
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Williams, Meirion Llewelyn. "Hanes yr Eisteddfod ym Môn yn y bedwaredd ganrif ar bymtheg, o 1800 hyd 1850." Thesis, Bangor University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417227.

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Moncrieff, Sophie. "Drosophila E3 ubiquitin ligase Hyperplastic Discs interacts with Shaggy and regulates morphogen signalling in the developing eye." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15881.

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The expression of the Drosophila melanogaster morphogen Hedgehog (Hh) plays a key role in co-ordinating proliferation and differentiation during animal development. Tight spatial and temporal regulation of Hh expression is essential for its correct function in these essential processes. Both mis-expression of its mammalian orthologue Sonic Hedgehog (Shh) and aberrant stimulation of the associated signalling pathway occur in a wide range of human tumours. Although there is extensive knowledge of the signal transduction pathway that is activated in a Hh-stimulated cell, very little is known about pathways governing the expression of the morphogen itself. The Drosophila tumour suppressor protein Hyperplastic Discs (Hyd), an E3 ubiquitin ligase, negatively regulates hedgehog (hh) expression and Hh pathway activity by independent mechanisms in the developing Drosophila eye. Genetically generated hyd mutant clones in the eye mis-express hh and the transcriptional activator of Hh target genes, Cubitus interruptus (Ci), and cause overgrowth of the surrounding wildtype tissue. However, the underlying molecular mechanism(s) by which Hyd regulates these morphogen regulatory pathways is not known. Hyd may be involved in ubiquitylating target proteins in these pathways, which could have degradative or non-degradative outcomes. In order to elucidate Hyd’s molecular role in potential morphogen regulatory pathways, I applied a proteomics-based approach to identify novel Hyd binding partners and ubiquitylated substrates. Tandem affinity purification in combination with mass spectrometry was used to purify and identify Hyd and its complexed binding partners from Drosophila cells. Binding and ubiquitylation assays were subsequently used to verify and characterize the interactions. In addition, a biased, literature-guided approach was applied to identify likely Hyd binding partners based on their involvement in morphogen signalling and conservation across species. Finally, to assess the functional consequences of a newly identified interaction, I used a Drosophila in vivo model to determine whether the novel binding partner was capable of modifying the hyd mutant phenotype. For this purpose, the Mosaic Analysis with a Repressible Cell Marker (MARCM) technique was used to generate hyd mutant clones in the developing larval eye, which were expressing transgenes resulting in either the over-expression or RNAi-mediated knockdown of the gene of interest. My results indicate that Hyd is involved in regulating both Hh and Wg morphogen signalling in the Drosophila eye, and that the molecular mechanism of action may, at least in part, involve the protein kinase Shaggy (Sgg). Hyd interacts with the Hh and Wg transcriptional activator proteins Ci and Armadillo, respectively, as well as the Sgg kinase. Sgg is a negative regulator of both the Hh and Wg pathways, and acts to direct the proteolytic processing or degradation of the transcriptional effectors of these morphogen pathways. Sgg and its mammalian orthologue GSK3β were ubiquitylated in vitro, and GSK3β ubiquitylation was negatively regulated by the mammalian homologue of Hyd, EDD. Knockdown of sgg in eye disc cells mutant for hyd resulted in a dramatic rescue of the overgrowth phenotype. Loss of hyd in clones located in the anterior region of the eye disc resulted in low levels of the full-length Hh transcriptional activator protein Ci. This effect was reversed completely as a result of sgg knockdown. Furthermore, loss of hyd in eye disc clones resulted in elevated Hh and Wg morphogen expression. Mis-expression of hh in hyd mutant clones was significantly reduced upon over-expression of a constitutively active Sgg kinase. Hence sgg appears to genetically act downstream of hyd to regulate hh gene expression and Ci expression. In summary my results identify Sgg as a novel regulator of hh gene expression, whose activity may be regulated by ubiquitylation, and which may be acting downstream of Hyd in a ubiquitin-regulated manner to control both hh gene expression and Hh pathway activity in the developing Drosophila eye. Hyd may also regulate Hh pathway activity by directly interacting with Ci and affecting its activity. The results also indicate that Hyd may be a master regulator of both Hh and Wg morphogen signalling during Drosophila development.
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Pagnier, Adrien. "Maturation de sites métalliques de protéines par les machineries d'assemblage des centres fer-soufre ISC et Hyd." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAV016.

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De nombreuses protéines possèdent des cofacteurs inorganiques contenant des métaux de transition. Les propriétés physico-chimiques de ces métaux permettent aux enzymes qui les portent de catalyser des réactions impossibles par l'utilisation des seules potentialités chimiques des vingt-deux acides aminés. Cependant, ces métaux sont toxiques pour la cellule lorsqu'ils sont libres. La synthèse et l'incorportion de ces cofacteurs dans les enzymes nécessitent alors des machineries protéiques complexes d'assemblage. Au cours de cette thèse, les mécanismes de synthèse des centres FeS par les machineries ISC (Iron-Sulfur Cluster) et Hyd (Hydrogenase) ont été étudiés. Le système ISC correspond à la machinerie primaire d'assemblage des centres FeS chez les bactéries, et un système équivalent existe chez les eucaryotes au niveau de la mitochondrie. Le système Hyd est la machinerie de maturation de l'hydrogénase à FeFe chez plusieurs eucaryotes inférieurs (algues et protistes) et dans une grande variété de bactéries. Dans un premier temps, nous nous sommes intéressés à la machinerie ISC d'Archaeoglobus fulgidus dont le coeur est composé de la cystéine désulfurase IscS et de la protéine échafaudage IscU ; IscS apportant le soufre nécessaire à l'assemblage du centre FeS sur IscU. Au cours de cette étude, il est apparu que IscS d'Archaeoglobus fulgidus ne possède pas d'activité cystéine désulfurase, mais qu'elle joue tout de même un rôle fondamental dans la synthèse du centre FeS sur le complexe IscSU en fournissant sa cystéine active en tant que ligand de l'agrégat. Dans un second temps, nous avons étudié la protéine à radical S-adénosyl-L-méthionine HydG, responsable de la synthèse des ligands CN- et CO du sous-agrégat à 2 Fe des hydrogénases à FeFe, qui était la seule maturase du système Hyd dont la structure n'était pas connue. Nos résultats structuraux et fonctionnels suggèrent que HydG synthétise successivement le ligand CN- dans un site actif basique, puis le ligand CO sur le cinquième Fe de son agrégat [5Fe-4S] C-terminal. Ce dernier pourrait être stabilisé par un ligand cystéine ou homocystéine
Many proteins have inorganic cofactors containing transition metals. The physicochemical properties of these metals allow the enzymes, which carry them to catalyze reactions not possible when only using the chemical properties of the twenty-two amino acids. However, these metals are toxic to the cell when they are free. Consequently, the synthesis and incorporation of these cofactors into enzymes requires complex protein assembles. In this thesis, the FeS clusters synthesis mechanisms by the ISC (Iron-Sulfur Cluster) and Hyd (Hydrogenase) machineries were studied. The ISC system corresponds to the primary FeS clusters assembly machinery in bacteria, and a homologous system exists in mitochondria. The Hyd system is FeFe-hydrogenase active site maturation machinery found in several lower eukaryotes (algae and protists) and in a wide variety of bacteria. Initially, we studied the ISC machinery from Archaeoglobus fulgidus whose core is composed of the cysteine desulfurase IscS and the scaffold protein IscU; IscS delivers the sulfur needed for the FeS assembly to IscU. From this study we conclude that IscS from Archaeoglobus fulgidus has no cysteine desulfurase activity, but it still plays a fundamental role in FeS cluster synthesis by IscSU complex by providing a cysteine ligand to the nascent cluster. Secondly, we studied the radical S-adenosyl-L-methionine HydG, responsible for the synthesis of CN- and CO ligand of the active site [FeFe] subcluster, which was the only Hyd system maturase for which the structure was unknown. Our structural and functional results suggest that HydG successively synthesizes the CN- ligand at a basic site, and then the CO ligand at the unique fifth Fe ion of its C-terminal [5Fe-4S] cluster. The latter could be stabilized by either a cysteine or a homocysteine ligand
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Turdur, Rhys. "Y Cymro 1932-45 : hanes sefydlu Y Cymro, ei ddatblygiad a'i gynnwys hyd ddiwedd yr ail ryfel byd." Thesis, Cardiff University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323314.

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Gudas, Mindaugas. "Systematic approach in water quality assessment of Lithuanian rivers in the context of physical, chemical and hyd-robiological parameters." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20110902_144002-20766.

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In this study the relationships among the land use and soil types in the entire river basin as well as in the buffer strip on the one hand, and the Lithuanian river water quality physico-chemical parameters on the other hand have been identified. The spatially based Factor analysis has been tested on river hydrochemical data from 108 sites for the period of 1999-2004. The Factor analysis enabled the identification of the main natural and anthropogenic processes (factors) determining water quality during each season of a year. As a result, monitoring stations were grouped into clusters each representing a group of stations mostly affected by a relevant factor. In addition, the suitability of world-wide used diatom-based water status assessment methods to apply under Lithuanian conditions has been assessed. The results of established water quality determining factors and the tested multivariate statistical procedures can be applied in practice when the reasons for water quality impairments are to be investigated or river monitoring network is to be optimized. The results reveal that Wastewater factor is prominent in small rivers downstream larger towns; Agro-geological factor – in northern Lithuania‘s rivers of heavy carbonated soils and intensive agriculture lands as well as in south-eastern Lithuania‘s rivers of more acidic soils; Hardly degradable organics factor – in northern and middle Lithuania‘s rivers of heavy-textured and fertile agricultural soils. The... [to full text]
Pastaruoju metu tiek Lietuvoje, tiek ir visoje Europos Sąjungoje labai aktualu tinkamai įvertinti vandens telkinių būklę (ypač pagal biologinius kokybės elementus), nustatyti vandens telkinių būklės problemas, jas lemiančius veiksnius bei imtis adekvačių būklės gerinimo priemonių, nes to reikalauja 2000 m. įsigaliojusi ES Bendroji vandens politikos direktyva – pagrindinis vandens sritį reguliuojantis teisinis dokumentas. Šio darbo tikslas - nustatyti žemėnaudos, dirvožemių ir upių vandens fizikinių, cheminių ir biologinių parametrų sąveikos dėsningumus vertinant vandens būklę. Įgyvendinant šį tikslą buvo siekiama sistemiškai įvertinti įvairių veiksnių poveikį Lietuvos upių vandens būklei ir nustatyti jų teritorinius dėsningumus bei įvertinti upių vandens būklės pagal titnagdumblius vertinimo metodų tinkamumą Lietuvos sąlygomis. Šiam tikslui pasiekti naudoti Lietuvos upių valstybinio monitoringo, dirvožemio ir žemės dangos duomenys pasitelkiant faktorinę analizę bei atitinkamus vienmatės statistikos metodus. Rezultatai parodė, kad upių būklę lemiančias priežastis galima patikimai pažinti, kartu vertinant hidrocheminius ir baseinų fizinių charakteristikų, dirvožemių ir žemėnaudos duomenis, jų kompleksiškai tarpusavio ryšių analizei pasitelkus tinkamus daugiamatės ir vienmatės statistikos metodus. Tokia analizė leidžia pažinti ne tik atskirus vandens ekosistemos komponentus, bet ir jų visumą kaip vieną sąveikaujančią sistemą ir priimti kokybiškesnius vandens kokybės valdymo... [toliau žr. visą tekstą]
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Zhao, Haiyan. "Catalytic Hydrogenation and Hydrodesulfurization of Model Compounds." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/26526.

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This dissertation describes two related studies on hydrogenation and hydrodesulfurization of heterocyclic S-containing compounds. Alkyl substituted thiophenes are promising candidates for hydrogen carriers as the dehydrogenation reactions are known to occur under mild conditions. Four types of catalysts including supported noble metals, bimetallic noble metals, transition metal phosphides and transition metal sulfides have been investigated for 2-methylthiophene (2MT) hydrogenation and ring opening. The major products were tetrahydro-2-methylthiophene (TH2MT), pentenes and pentane, with very little C5-thiols observed. The selectivity towards the desired product TH2MT follows the order: noble metals > bimetallics > phosphides > sulfides. The best hydrogenation catalyst was 2% Pt/Al2O3 which exhibited relatively high reactivity and selectivity towards TH2MT at moderate temperatures. Temperature-programmed desorption (TPD) of hydrogen indicated that the H2 desorption amount was inversely related to the rate of TH2MT formation. Temperature programmed reaction (TPR) experiments revealed that pentanethiol became the major product, especially with HDS catalysts like CoMoS/Al2O3 and WP/SiO2, which indicates that poisoned or modified conventional HDS catalysts would be good candidates for further 2MT hydrogenation studies. The role of tetrahedral Ni(1) sites and square pyramidal Ni(2) sites in Ni2P hydrotreating catalysts was studied by substitution of Ni with Fe. The Fe component was deemed as a good probe because Ni2P and Fe2P adopt the same hexagonal crystal structure, yet Fe2P is completely inactive for hydrodesulfurization (HDS). For this purpose a series of NiFeP/SiO2 catalysts were prepared with different Ni:Fe molar ratios (1:0, 3:1, 1:1, 1:3, and 0:1) and investigated in the HDS of 4,6-dimethyldibenzothiophene at 300 and 340 oC. The uniformity of the NiFe series was demonstrated by x-ray diffraction analysis and by Fourier transform infrared (FTIR) spectroscopy of adsorbed CO. The position of substitution of Fe was determined by extended X-ray absorption fine structure (EXAFS) analysis. It was found that at 300 oC the HDS activity of the catalysts decreased with increasing Fe content and that this could be explained by the substitution of Fe at the more active Ni(2) sites. As temperature was raised to 340 oC, the activity of the Fe-containing samples increased, although not to the level of Ni2P, and this could be understood from a reconstruction of the NiFe phase to expose more Ni(2) sites. This was likely driven by the formation of surface Ni-S bonds, which could be observed by EXAFS in spent samples.
Ph. D.
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Morgan, Menna E. "Hanes Geiriaduraeth yng Nghymru o 1547 hyd 1914 : gyda sylw arbennig i ddylanwad John Walters a William Owen Pughe ar eiriadurwyr 1805-1850." Thesis, Bangor University, 2002. https://research.bangor.ac.uk/portal/en/theses/hanes-geiriaduraeth-yng-nghymru-o-1547-hyd-1914--gyda-sylw-arbennig-i-ddylanwad-john-walters-a-william-owen-pughe-ar-eiriadurwyr-18051850(dca14c51-baef-4b51-ad1b-cb2a6fcc6eee).html.

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Astudiaeth yw hon o hanes a datblygiad geiriaduron printiedig o 1547, sef blwyddyn cyhoeddi A Dictionary in Englyshe and Welshe gan William Salesbury, hyd ddechrau'r ugeinfed ganrif pan gyhoeddwyd geiriaduron William Spurrell dan olygyddiaeth J. Bodvan Anwyl. Astudir dros ddeg ar hugain o gyfrolau i gyd, cyfrolau a luniwyd i ddiwallu gwahanol anghenion y genedl dros gyfnod o dair canrif a hanner ac sydd, or herwydd, yn amrywio'n fawr o ran maint a chynnwys. Er mwyn gosod terfynau pendant i'r astudiaeth, fe'i cyfyngwyd i eiriaduron Cymraeg-Lladin/Lladin-Cymraeg, Cymraeg-Saesneg, SaesnegCymraeg a Chymraeg-Cymraeg. Nid ymdrinnir ä geiriaduron Beiblaidd, geiriaduron termau, geiriaduron tafodieithol na'r geirfäu Saesneg-Cymraeg a gyhoeddwyd yn y bedwaredd ganrif ar bymtheg ar gyfer ymwelwyr i Gymru. Trafodir hefyd rai geiriaduron nas cyhoeddwyd am fod iddynt arwyddocäd yng nghyd-destun gweithgarwch geiriadurol diweddarach. Ystyrir y modd y defnyddiwyd hwy fel ffynhonnell gan eiriadurwyr eraill ac i ba raddau y cawsant eu golygu a'u hymgorffori yn eu gweithiau. Gan fod John Walters a William Owen Pughe yn hawlio Ile mor amlwg yn natblygiad geiriaduraeth ar ddiwedd y ddeunawfed ganrif, rhoddir sylw arbennig i dylanwad y ddau ar weithgarwch geiriadurol rhwng 1805 a 1850. Ceisir dangos hefyd sut y newidiodd agwedd pobl tuag syniadau ieithyddol a geirfa Pughe yn raddol erbyn diwedd y cyfnod clan syiw.
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Baubet, Bertrand. "Influence de la morphologie 2D de la phase active sur la sélectivité des catalyseurs sulfures en HDS des essences." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10067.

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Ce travail de thèse étudie l’influence de la morphologie des feuillets de sulfure de molybdène sur la sélectivité des catalyseurs d’hydrotraitement. Les feuillets de phase active présentent en effet deux types de bords appelés « M-edge » et « S-edge » susceptibles de conduire à des réactivités différentes. Le changement de la morphologie 2D des feuillets pourrait modifier les proportions de bords M et S exposés et ainsi les propriétés catalytiques des catalyseurs sulfures. Pour cela, des catalyseurs non promus (Mo) et promus (CoMo), supportés sur alumine ont été préparés par imprégnation à sec puis sulfurés dans des conditions variées (gaz et température). Des tests catalytiques en hydrodésulfuration (HDS) sélective des essences de FCC (sélectivité HDS/HYD) ont ensuite permis d’évaluer l’impact de la morphologie en s’appuyant sur des modèles géométriques construits à partir de calculs DFT et de caractérisations expérimentales (TEM, IR (CO), TPR, XPS). Les résultats obtenus pour les catalyseurs de type Mo semblent ainsi confirmer l’influence de la morphologie 2D sur la sélectivité HDS/HYD, le bord M paraissant être le plus sélectif pour les catalyseurs non promus. Ils mettent également en évidence l’importance de la réductibilité plus ou moins marquée des bords sur les propriétés catalytiques, notamment sur le bord M. Le changement des conditions de sulfuration semble donc affecter la morphologie des particules mais également les propriétés chimiques propres à chaque bord. En ce qui concerne les catalyseurs promus, la variation des conditions de sulfuration semble agir essentiellement au niveau de la répartition du promoteur entre les bords M et S. Cependant, les interactions avec le support paraissent constituer un frein aux effets de promotion. Dans ce contexte, les sulfurations à haute température sous H2S pur permettent d’obtenir des gains significatifs en activité et sélectivité. Ces résultats semblent dus à de faibles interactions avec le support et une décoration privilégiée du bord S qui pourrait favoriser la réaction d’HDS et limiter la réaction d’HYD. Au final, les interprétations effectuées en terme de morphologie 2D tendent à confirmer que ce paramètre peut constituer un axe de développement intéressant pour les catalyseurs d’hydrotraitement. L'optimisation des conditions de sulfuration permettraient bien de faire varier la morphologie et le taux de décoration du promoteur des catalyseurs, améliorant ainsi significativement l'activité et la sélectivité
This thesis examines the influence of the morphology of particles of molybdenum sulfide on selectivity of hydrotreating catalysts. Nanoparticles of active phase present two types of edges called “M-edge” and “S-edge” which may lead to different reactivities. The change in morphology of the 2D sheets could change the proportions of M and S edges exposed and thus the catalytic properties of sulfide catalysts. For this, non-promoted (Mo) and promoted (CoMo) catalysts, supported on alumina were prepared by dry impregnation and sulfide in various conditions (gas and temperature). Catalytic tests in selective hydrodesulfurization (HDS) of FCC gasoline (selectivity HDS /HYD) were then used to assess the impact of the morphology based on geometrical models which were constructed with DFT calculations and experimental characterizations (TEM, IR (CO), TPR, XPS). The results for Mo catalysts seem to confirm the influence of the 2D morphology selectivity HDS / HYD, M-edge appearing to be the most selective for non-promoted catalysts. They also highlight the importance of the reducibility more or less pronounced of the edges on the catalytic properties, especially on the M-edge. The different conditions of sulfidation seem to affect the morphology of the particles but also the specific chemical properties at each edge. Regarding to the promoted catalysts, the different conditions of sulfidation appear to act primarily at the distribution of the promoter between the M and S edges. However, interactions with the carrier appear to constitute an obstacle to promoting effects. In this context, sulfidations at high temperature in pure H2S lead to obtain significant gains in activity and selectivity. These results appear to be due to weak interactions with the carrier and to the presence of the promoter on the S-edge which could promote the HDS reaction and limit the HYD reaction. Finally, the interpretations made in terms of 2D morphology tend to confirm that this parameter can be an interesting line of development for hydrotreating catalysts. Optimization of the sulfidation conditions could effectively allow to vary the morphology and the rate of decoration of promoted catalysts which significantly improve the activity and selectivity
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Books on the topic "HYD"

1

Elisa, Gillian. Hyd yn hyn. Caernarfon: Gwasg Gwynedd, 2007.

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Yma o hyd. 2nd ed. Talybont, Dyfed: Y Lolfa, 1986.

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Lewis, Geraint. Haf o hyd. Llanrwst: Gwasg Carreg Gwalch, 2009.

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Thomas, Gwyn. Am ryw hyd. Dinbych: Gwasg Gee, 1986.

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Tomos, Angharad. Yma o hyd. Talybont, Dyfed: Y Lolfa, 1985.

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Dicks, Terrance. Mêts o hyd. Llandysul: Gwasg Gomer, 1998.

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Madhu, Cittarvu. Di epiḍamik: Hyd virus. Haidarābād: Vāhini Bukṭrasṭ, 2011.

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Gruffydd, Elfed. Ar hyd Ben 'Rallt. 2nd ed. Llanrwst: Gwasg Carreg Gwalch, 1999.

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Gruffydd, Elfed. Ar hyd Ben 'Rallt. Pwllheli: Clwb y Bont, 1991.

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Jones, John Gwilym. Ar draws ac ar hyd. Caernarfon: Gwasg Gwynedd, 1986.

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Book chapters on the topic "HYD"

1

Bährle-Rapp, Marina. "hydr..., Hydr..., auch: Hydro..., Hyd..." In Springer Lexikon Kosmetik und Körperpflege, 262. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_4841.

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Chríost, Diarmait Mac Giolla. "Angharad Tomos Yma o Hyd (1985)." In Welsh Writing, Political Action and Incarceration, 148–78. London: Palgrave Macmillan UK, 2013. http://dx.doi.org/10.1057/9781137372277_8.

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Muntau, A. C. "Angeborene Störungen des Kohlen hyd ratstoffwechsels." In Therapie der Krankheiten im Kindes- und Jugendalter, 158–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-10471-2_15.

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Fleisch, Elgar, Markus Weinberger, and Felix Wortmann. "Geschäftsmodelle im Internet der Dinge." In Edition HMD, 1–16. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_1.

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Hogrebe, Frank, and Wilfried Kruse. "Verwaltung 4.0 als Beitrag zur Wertschöpfung am Standort Deutschland 4.0 – Bedeutung einer weiterentwickelten Wirtschaftsförderung 4.0." In Edition HMD, 147–59. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_10.

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Bendel, Oliver. "Die Industrie 4.0 aus Sicht der Ethik." In Edition HMD, 161–71. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_11.

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Huber, Daniel, and Thomas Kaiser. "Wie das Internet der Dinge neue Geschäftsmodelle ermöglicht." In Edition HMD, 17–27. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_2.

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Langmann, Reinhard, and Michael Stiller. "Industrial Cloud – Status und Ausblick." In Edition HMD, 29–47. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_3.

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Müller, Bernd, and Frank Härtig. "Herausforderungen und Lösungsansätze zur einheitlichen Kommunikation von Messdaten für Industrie 4.0 und das Internet of Things." In Edition HMD, 49–58. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_4.

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Thomas, Oliver, Novica Zarvić, Jörg Brezl, Michael Brockschmidt, and Michael Fellmann. "Lebensmittelindustrie 4.0 – Cyber-physische Produktionssysteme zur sicheren und unverfälschbaren Datenverarbeitung." In Edition HMD, 59–69. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18165-9_5.

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Conference papers on the topic "HYD"

1

"Functional roles of the E3 ubiquitin ligase HYD in Drosophila tissues." In Bioinformatics of Genome Regulation and Structure/ Systems Biology. institute of cytology and genetics siberian branch of the russian academy of science, Novosibirsk State University, 2020. http://dx.doi.org/10.18699/bgrs/sb-2020-012.

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Frey, Thomas W., and H. J. Page. "Virtual HUD using an HMD." In Aerospace/Defense Sensing, Simulation, and Controls, edited by Ronald J. Lewandowski, Loran A. Haworth, Henry J. Girolamo, and Clarence E. Rash. SPIE, 2001. http://dx.doi.org/10.1117/12.438000.

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Budhiraja, Rahul, Gun A. Lee, and Mark Billinghurst. "Interaction techniques for HMD-HHD hybrid AR systems." In 2013 IEEE International Symposium on Mixed and Augmented Reality (ISMAR). IEEE, 2013. http://dx.doi.org/10.1109/ismar.2013.6671786.

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Budhiraja, Rahul, Gun A. Lee, and Mark Billinghurst. "Using a HHD with a HMD for mobile AR interaction." In 2013 IEEE International Symposium on Mixed and Augmented Reality (ISMAR). IEEE, 2013. http://dx.doi.org/10.1109/ismar.2013.6671837.

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Bailey, Randall E. "Head-up display (HUD) lessons learned for helmet-mounted display (HMD) development." In SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, edited by Ronald J. Lewandowski, Wendell Stephens, and Loran A. Haworth. SPIE, 1994. http://dx.doi.org/10.1117/12.177364.

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Charissis, Vassilis, Stylianos Papanastasiou, and George Vlachos. "Comparative Study of Prototype Automotive HUD vs. HDD: Collision Avoidance Simulation and Results." In SAE World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2008. http://dx.doi.org/10.4271/2008-01-0203.

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Funabiki, Kohei, and Tomoko Iijima. "Attention allocation in Tunnel-in-the-Sky on HUD and HDD for visual flight." In 2007 IEEE/AIAA 26th Digital Avionics Systems Conference. IEEE, 2007. http://dx.doi.org/10.1109/dasc.2007.4391949.

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Maia, Guilherme, Andre L. L. Aquino, Aline Viana, Azzedine Boukerche, and Antonio A. F. Loureiro. "HyDi." In the second ACM international symposium. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2386958.2386976.

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Littleton, Linda. "HDD." In the 22nd annual ACM SIGUCCS conference. New York, New York, USA: ACM Press, 1994. http://dx.doi.org/10.1145/196355.196453.

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Misherghi, Ghassan, and Zhendong Su. "HDD." In Proceeding of the 28th international conference. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1134285.1134307.

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Reports on the topic "HYD"

1

Shaw, Robert L. Helmet-Mounted Display (HMD) Interface Design for Head-Up Display (HUD) Replacement Exploratory Development - NTL, Inc. Fort Belvoir, VA: Defense Technical Information Center, June 2002. http://dx.doi.org/10.21236/ada408669.

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Zimring, Mark, and Ian Hoffman. HUD PowerSaver Pilot Loan Program. Office of Scientific and Technical Information (OSTI), December 2010. http://dx.doi.org/10.2172/1016371.

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Shkolnikov, Vladimir M., and Dmitri A. Jdanov. R programs for writing HMD life tables and HMD death rates to pooled data files. Rostock: Max Planck Institute for Demographic Research, April 2016. http://dx.doi.org/10.4054/mpidr-tr-2016-001.

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Frazier, S. J., J. L. Hebert, L. B. Kitsembel, Y. G. Chen, and K. R. Runyan. HPD Pulser Upgrade to Improve Risetime,. Fort Belvoir, VA: Defense Technical Information Center, May 1996. http://dx.doi.org/10.21236/ada309779.

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Neely, Christopher J. Unconventional monetary policy had large international effects. Federal Reserve Bank of St. Louis, 2010. http://dx.doi.org/10.20955/wp.2010.018.

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Markley, R. E., J. L. Elarton, and C. T. Allen. High-speed digital project, HSD test capability. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10146570.

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Di Stefano, Carlos, Louie Long, Krista Stalsberg, Suzannah Wood, and Chris Biwer. HED Hydrodynamics in the Common Modeling Framework. Office of Scientific and Technical Information (OSTI), June 2021. http://dx.doi.org/10.2172/1804307.

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Merritt, Elizabeth. HED Hydrodynamics Instability and Turbulence Campaigns [Slides]. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1807817.

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Ewing, Reid. How Affordable is HUD Affordable Housing?: Final Report. Portland State University Library, April 2015. http://dx.doi.org/10.15760/trec.79.

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Desjardins, Tiffany. Investigating traditional fluid instabilities in an HED regime. Office of Scientific and Technical Information (OSTI), April 2018. http://dx.doi.org/10.2172/1434434.

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