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Dissertations / Theses on the topic 'Physical and chemical composition'

Author: Grafiati

Published: 7 September 2021

Last updated: 25 July 2025

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1

Rahman, Md Mostafizur. "Influences of biodiesel chemical compositions and physical properties on engine exhaust particle emissions." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/82754/8/Md_Rahman_Thesis.pdf.

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This thesis presents a comprehensive study on the influences of biodiesel chemical composition and physical properties on diesel engine exhaust particle emissions. It examines biodiesels from several feedstocks having wide variations in their chemical composition (carbon chain length, unsaturation and oxygen content) and physical properties (density, viscosity, surface tension, boiling point etc.), and evaluates their influence on exhaust particle emissions. The outcome of this thesis is significant since it reveals the importance of regulating biodiesels chemical composition in order to ensur

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2

Chen, James. "In-situ study of the chemical composition of photochromic Yttrium Oxy-Hydrides thin films." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-389390.

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3

Mohamed, Guma E. T. "Physical and chemical composition of particulate pollutants in an urban area of Cardiff, Wales." Thesis, Cardiff Metropolitan University, 2012. http://hdl.handle.net/10369/4738.

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The issue of particulate matter (PM) and associated health and environmental problems has been subjected to extensive research in a number of countries. However, there are no recent studies concerning the physical and chemical properties of PM from urban Cardiff. Measurements were made to study particulate matter, their sources, chemical compositions, gaseous precursors and their seasonal variations in urban Cardiff (latitude: 51° 28´ 59.47¨N and longitude: 03° 09´ 58.08¨W) from December 2009 to November 2010. A low volume air sampler for PM10 and PM2.5 particles, and real-time air samplers fo

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4

Pourkhesalian, Ali Mohammad. "Effects of biodiesel chemical composition on the chemical and physical properties of the primary and secondary diesel particulate matter." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/86757/14/86757_Ali_Mohammad_Pourkhesalian_Thesis.pdf.

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This thesis improves our insight towards the effects of using biodiesels on the particulate matter emission of diesel engines and contributes to our understanding of their potential adverse health effects. The novelty of this project is the use of biodiesel fuel with controlled chemical composition that enables us to relate changes of physiochemical properties of particles to specific properties of the biodiesel. For the first time, the possibility of a correlation of the volatility and the Reactive Oxygen Species concentration of the particles is investigated versus the saturation, oxygen con

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5

Elling, Jodi L. "Chemical composition and physical properties of 20% milk fat reformulated creams manufactured from reduced cholesterol butteroil." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-03242009-040416/.

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6

Stonkutė, Edita. "Chemical composition of kinematically identified galactic stellar group." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130925_093107-33619.

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A number of stellar streams, moving and kinematic groups were identified in the Milky Way galaxy. Some of them are suspected to originate from accreted satellites. Can we also find such traces of ancient merger events in the solar neighbourhood? Helmi et al. (2006) identified three new coherent groups of stars in the Geneva-Copenhagen survey (Nordström et al. 2004) and suggested that those might correspond to remains of disrupted satellites. With the detailed chemical composition analysis of the newly identified kinematic group we aim to contribute to the Galactic substructure studies. The ma

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7

Weis, Ryan Nicholas. "Independent effects of energy intake and body weight on physical and chemical body composition in growing pigs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58387.pdf.

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8

Shilton, Vaughan Francis. "The significance of indoor:outdoor relationships, and physical and chemical composition in personal exposure to urban particulate matter." Thesis, University of Wolverhampton, 2003. http://hdl.handle.net/2436/88474.

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9

Coudenys, Kimberley Troy. "The effect of body weight and energy intake on the physical and chemical body composition in growing-finishing pigs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ35877.pdf.

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10

Cotiyane, Phumlile L. "The response of microalgal biomass and community composition to the chemical and physical dynamics of two Eastern Cape estuaries." Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/4999.

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Water quality characteristics of estuaries are influenced by both natural and anthropogenic activities. Estuaries situated in coastal urban areas are exposed to more perturbations than those in rural settings. This study determined the drivers of phytoplankton biomass and community composition in two Eastern Cape estuaries and evaluated the anthropogenic activities that influence the overall health of each estuary. The estuaries were sampled in summer and winter (2014, 2015). The water quality of the estuaries was determined by measuring the variability in physico-chemical parameters (salinity

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11

Matsson, Sanna. "Optimal physical and chemical environment for vegetative gametophyte culture of Saccharina latissima : - with emphasis on nutrient composition and light quality." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21422.

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The production of sporelings is a bottle-neck when cultivating Saccharina latissima. Establishing a vegetative gametophyte stocks gives a constant supply of healthy sporelings, enabling a year-round cultivation independent of the availability of natural spores. Finding optimal conditions for vegetative growth of gametophytes are of importance to produce mass quantities of sporelings. In the present study, it was desirable to establish optimal fysical and chemical environments for vegetative gametophyte culture of S. latissima which can be used in large scale cultivation systems. This were exam

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12

Whatmuff, Mark. "The effect of applied 'high magnesium' bitterns upon the physical and chemical properties of soils from Wakool-Tullakool Irrigation District, New South Wales, Australia." Thesis, The University of Sydney, 1991. https://hdl.handle.net/2123/26371.

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This study was concerned with determining the effect upon soil structure when the drainage scheme evaporation pond product "high magnesium bitterns" was applied to soils from the Wakool-Tullakool irrigation district, N.S.W, Australia. Two soils were chosen covering the extremes of soil types found in the district. They were; 1. Burraboi Sandy Loam (Gn 2.63) a Calcic Aqiuc Haplustult and, 2. Moulmein Clay (Ug5.24) a Typic Chromoxerert. Laboratory tests were carried out to determine the basic physical and chemical properties of the two soils. Clay mineralogy for the two soils was deter

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13

Soto, Emmanuel. "Identifying the Origins of Volcanic Ash Deposits Using Their Chemical and Physical Compositions." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3650.

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Recent ocean sediments collected offshore Chile by Ocean Drilling Program Leg 202 contained layers of volcanic ash of unknown origin. These deposits may have originated from sources in the Southern Volcanic Zone (SVZ) within the Andean Volcanic Belt to the east, or from explosive volcanoes in the southwestern Pacific transported by westerly prevailing winds. In this study, mineral and glass textures and compositions of Leg 202 ashes were evaluated to try to determine the sources of the ash layers. Ash fragments were imaged and analyzed for major elements using an SEM with X-Ray detector and fo

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14

Makkay, Kristina. "The diversity and community composition of aquatic macrophytes in relation to physical and chemical environmental variables in the Rideau River, Ontario." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6383.

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Like many rivers around the world, the Rideau River is under pressure from a number of human induced activities resulting in a loss of species and habitat. In order to prioritise conservation efforts, it is necessary to understand what type of habitats will support the widest range of species. This study examines which physical and chemical factors exert the strongest influence on the diversity and community composition of aquatic macrophytes in the Rideau River. Macrophyte species were surveyed at 33 sites on the Rideau River, Ontario, in six 1 m2 quadrats aligned in a belt transect perpendic

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15

Mikolaitis, Šarūnas. "Evolutionary Effects of Chemical Composition in Red Giants of Open Clusters." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120913_085458-84188.

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Open clusters are important tools for studying of the Galactic disk and for understanding stellar evolution. Stars of clusters have constant age, composition and distance. This makes them to be excellent laboratories for investigations of stellar and Galactic chemical evolution. The main aim of the study is the analysis of mixing tracers and extra mixing evidences in photospheres of evolved stars. Extra-mixing processes may modify the surface abundances of 12^C/13^C and 12^C/14^N ratios. This study aims to test theoretical models. The secondary goal is a contribution to the study of present

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16

Calderwood, Arthur Robertson. "Mineral physics constraints on the chemical composition and temperature of the Earth's mantle." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0021/NQ48612.pdf.

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17

Gonzalez, Artola Sonia. "Chemical, Physical and Sensorial Compositions of Farmed and Wild Yellow Perch (Perca flavescens), Southern Flounder (Paralichthys lethostigma) and Coho Salmon (Oncorhynchus kisutch)." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29854.

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This study compared chemical, physical and sensorial properties of wild and farmed fish. Farmed yellow perch fillets showed higher lipid contents (2.78% vs. 1.39%); softer texture (0.41 J/g vs. 0.53 J/g); whiter color (higher L* and lower b*values); different fatty acid profile (higher n-3/n-6 ratio), and mineral composition, when compared to their wild counterparts. Similar amino acid profiles and flavor were found between treatments. Dietary protein by itself influenced color and flavor of yellow perch fillets. Yellow perch fed the highest protein concentrations exhibited higher b* (yell

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18

Huang, Shu. "Influence of Chemical Composition and Water on the Bulk Modulus of Pyrope." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1185.

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Garnets are major silicates from the upper mantle to the transition zone. Elastic properties of garnets are essential to interpret the variation of seismic velocities at different depths and construct a model of the Earth’s composition. Due to the chemical flexibility at octahedron sites of the crystal structures, garnets usually exist with multiple components and have many composition variations. Pyrope is an important member in the garnet group. Fe2+-Mg2+ substitution in pyrope is one of the common solid solutions. We have synthesized and measured three synthetic solid solutions samples (Py8

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19

AQUINO, AFONSO R. de. "Caracterizacao e estudo termoanalitico de clinquer produzido em industrias brasileiras." reponame:Repositório Institucional do IPEN, 1996. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10800.

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Made available in DSpace on 2014-10-09T12:44:08Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:00Z (GMT). No. of bitstreams: 1 02948.pdf: 2171704 bytes, checksum: 896d566852d96a5900bc907e2d478a43 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Química - Universidade de São Paulo - IQ/USP

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20

Garbarienė, Inga. "Origin, chemical composition and formation of submicron aerosol particles in the atmosphere." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680.

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The objective of the work was to investigate physical and chemical properties and sources of the atmospheric aerosol particles in the submicron fraction by combining different analytical techniques. The dependence of concentrations of organic and elemental carbon in different air masses was determined and the contribution of regional and local sources to the net aerosol particle pollution was estimated. Analysis of the size distribution of carbonaceous aerosol particles in background and urban areas was performed. Biogenic organic aerosol made up 15 % of the organic aerosol mass at the Preila

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21

Alexander, Jennifer Mary. "Optical properties of mineral dust aerosol including analysis of particle size, composition, and shape effects, and the impact of physical and chemical processing." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/1819.

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Atmospheric mineral dust has a large impact on the earth’s radiation balance and climate. The radiative effects of mineral dust depend on factors including, particle size, shape, and composition which can all be extremely complex. Mineral dust particles are typically irregular in shape and can include sharp edges, voids, and fine scale surface roughness. Particle shape can also depend on the type of mineral and can vary as a function of particle size. In addition, atmospheric mineral dust is a complex mixture of different minerals as well as other, possibly organic, components that have been m

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22

Sánchez, Balseca Joseph. "Spatio-temporal association of physic characteristics and chemical composition of the atmosphere with human mortality data." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/673195.

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Air pollution is an environmental challenge that has an important influence on the life of human beings. Therefore, the development, implementation, and evaluation of new statistical approaches will improve the numerical modeling of the spatial distribution of air pollutants and their socio-economic impact. Demography statistically evaluates the change in human populations over time (temporal models). Mortality is a factor that influences the human population, and its definition in the short, medium and long term is of utmost importance for government health and economic plans. Air pollution

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23

Santana, Adelmo Ferreira de. "Avaliação da concentração de elementos em diferentes tecidos de bovino do Estado da Bahia." reponame:Repositório Institucional da UFBA, 2011. http://www.repositorio.ufba.br/ri/handle/ri/10075.

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200f.<br>Submitted by Ana Hilda Fonseca (anahilda@ufba.br) on 2013-04-01T15:16:45Z No. of bitstreams: 1 TESE PRONTA PARA IMPRESSÃO DEFINITIVA 26.05.2011.pdf: 2461628 bytes, checksum: 11e551068d6b7baa889ccf316b488a32 (MD5)<br>Approved for entry into archive by Ana Hilda Fonseca(anahilda@ufba.br) on 2013-04-24T15:57:23Z (GMT) No. of bitstreams: 1 TESE PRONTA PARA IMPRESSÃO DEFINITIVA 26.05.2011.pdf: 2461628 bytes, checksum: 11e551068d6b7baa889ccf316b488a32 (MD5)<br>Made available in DSpace on 2013-04-24T15:57:23Z (GMT). No. of bitstreams: 1 TESE PRONTA PARA IMPRESSÃO DEFINITIVA 26.05.2011.pdf: 2

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24

Aðalsteinsson, Sigurbjörn Már. "Study of rare-earth oxy-hydrides as candidates for photochromic materials." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-396533.

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25

Rousseau, Dérick. "Modification of the physical and compositional properties of butter fat-canola oil blends by chemical and enzymatic interesterification." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24424.pdf.

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26

Hao, Yushan. "Characterization of Peat Bog CO2 and CH4 Production Potentials in relation to Peat Physico-chemical Properties and Vegetation Composition." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562338709421684.

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27

Mercier, Vincent. "Relationships between composition and size distribution of invertebrates colonizing navigation buoys and physico-chemical parameters of the St. Lawrence River, Montreal (Quebec)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/MQ28445.pdf.

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28

PESSOA, Wagner Rogério Leocádio Soares. "Influência da temperatura e período de molhamento no desenvolvimento da antracnose e nas características físico-químicas da banana." Universidade Federal Rural de Pernambuco, 2005. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6661.

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Submitted by (lucia.rodrigues@ufrpe.br) on 2017-03-23T15:49:15Z No. of bitstreams: 1 Wagner Rogerio Leocadio Soares Pessoa.pdf: 1202325 bytes, checksum: 24359deb95d67f77dc4011b48213d142 (MD5)<br>Made available in DSpace on 2017-03-23T15:49:15Z (GMT). No. of bitstreams: 1 Wagner Rogerio Leocadio Soares Pessoa.pdf: 1202325 bytes, checksum: 24359deb95d67f77dc4011b48213d142 (MD5) Previous issue date: 2005-02-28<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>The banana is the second largest fruit more consumed in the world, being the fresh fruit that detai

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29

Fleury, Benjamin. "Etude de la sensibilité de la vitesse résiduelle d'altération et de ses paramètres de modélisation à la composition des verres." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2013. http://tel.archives-ouvertes.fr/tel-01019255.

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Cette thèse contribue à l'étude du comportement à long terme des colis de verre nucléaire R7T7 à travers un plan d'expérience (27 verres) développé pour étudier les effets de composition sur la vitesse résiduelle d'altération dans l'eau. Une étude sur l'impact de la précipitation de phases magnésiennes sur l'altération du verre et un travail de modélisation ont aussi été menés. Entre les différents verres du plan, il y a un ordre de grandeur d'écart sur les grandeurs mesurées (quantités et vitesses d'altération, pH). Ces grandeurs sont traitées statistiquement pour obtenir des équations prédic

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30

Bouziani, Naceur. "Elaboration d'un modèle thermo-chimique de la matière cométaire : contribution à l'étude physico-chimique des milieux poreux hétérogènes." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10190.

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Un des plus importants resultats obtenus lors du dernier passage de la comete p/halley est l'estimation de la densite moyenne du noyau. Cela a conforte les hypotheses emises depuis longtemps sur la nature et la structure interne poreuse des cometes. Ces dernieres sont considerees comme des melanges de glace (h2o, co, co2, hcn, et autres volatiles). Lorsqu'une comete s'approche du soleil, la chaleur qui augmente provoque la production gazeuse des volatiles. C'est au cours de cette course vers le soleil que le fameux phenomene cometaire (coma, gaz et queue de poussiere) s'offre a l'observation.

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31

Lino, João da Silva Fonseca Correia. "Composição fenólica e características cromáticas de madeiras de carvalho Limousin e de castanheiro (utilizadas em vasilhas e sob a forma de aduelas) destinadas ao envelhecimento de aguardente vínica." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/20926.

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A tecnologia tradicional de envelhecimento de aguardentes vínicas,em vasilha de madeira, envolve um custo elevado, devido ao longo período de contacto entre a madeirae a aguardente e à existência de uma perda significativa desta última por evaporação. A necessidade de reduzir o custo de investimento, justifica pois a procura de sistemas alternativos de envelhecimento.Como tal, o objetivo do presente trabalho consiste noestudo das características físico-químicas das madeiras de duas espécies botânicas (carvalho francês Limousin e o castanheiro), com queima média mais, utilizadas em simultâneo n

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Moore, Richard Herbert. "Using measurements of CCN activity to characterize the mixing state, chemical composition, and droplet growth kinetics of atmospheric aerosols to constrain the aerosol indirect effect." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45945.

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Atmospheric aerosols are known to exert a significant influence on the Earth's climate system; however, the magnitude of this influence is highly uncertain because of the complex interaction between aerosols and water vapor to form clouds. Toward reducing this uncertainty, this dissertation outlines a series of laboratory and in-situ field measurements, instrument technique development, and model simulations designed to characterize the ability of aerosols to act as cloud condensation nuclei (CCN) and form cloud droplets. Specifically, we empirically quantify the mixing state and thermodynamic

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ALMEIDA, Mayra Zilta Permínio Rodrigues Bezerra de. "Estudo da mastite subclinica em ovelhas da raça Santa Inês e sua influência sobre as características físico-químicas do leite." Universidade Federal Rural de Pernambuco, 2008. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5764.

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Submitted by (edna.saturno@ufrpe.br) on 2016-10-19T14:26:43Z No. of bitstreams: 1 Mayra Zilta Perminio Rodrigues Bezerra Almeida.pdf: 885886 bytes, checksum: 6037f5e7b77593c2f32547d40123421b (MD5)<br>Made available in DSpace on 2016-10-19T14:26:43Z (GMT). No. of bitstreams: 1 Mayra Zilta Perminio Rodrigues Bezerra Almeida.pdf: 885886 bytes, checksum: 6037f5e7b77593c2f32547d40123421b (MD5) Previous issue date: 2008-02-04<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>The aim of this work was to accomplish a study of subclinical mastitis in ewes of Sant

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ENGIDASEW, TESFAYE ASRESAHAGNE. "Engineering geological characterization of volcanic rocks of ethiopian and sardinian highlands to be used as construction materials." Doctoral thesis, Università degli Studi di Cagliari, 2014. http://hdl.handle.net/11584/266456.

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This thesis presents the results of the study conducted on the “Geoengineering characterization of volcanic rocks from Ethiopian and Sardinian highlands to be used as construction materials”. Though, the two project areas are geographically far apart, both are partly covered with volcanic rocks mainly consisting of basic and subordinate felsic rocks. The research was conducted in two countries; part I, the Ethiopian Project area located on the northwestern central Highlands of the Amhara regional state. It is characterized by rugged topography being situated on the western margin of the

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Dubois, Clément. "Impact de la réactivité multiphasique sur la composition et les propriétés physico-chimiques de l’aérosol atmosphérique." Electronic Thesis or Diss., Lyon 1, 2022. http://www.theses.fr/2022LYO10223.

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Les aérosols atmosphériques ultrafins font partis des plus abondants dans l’atmosphère. Leurs implications sur le climat et la qualité de l’air sont avérés. Les différents rapports du GIEC, ont cependant montré que les connaissances actuelles sont encore insuffisantes pour permettre de quantifier avec exactitude l’impact des aérosols sur le climat. Ces incertitudes viennent de la complexité des aérosols atmosphériques et de leur importance dans la formation des nuages. En effet, la formation et l’évolution de ces derniers dans l’atmosphère conduisent à des modifications de leur taille, composi

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Nacitas, Joselle. "Composition du fruit à pain récolté sur un territoire contrasté : Structure, propriétés et aptitudes technologiques de son amidon." Thesis, Antilles-Guyane, 2012. http://www.theses.fr/2012AGUY0517/document.

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Les résultats de cette étude de la composition du fruit à pain récolté sur un territoire contrasté du point de vue agropédoclimatique, et de son amidon, montrent que la teneur en amidon du fruit à pain apparaît comme étant influencée par la saison, mais pas par la zone de récolte. La teneur en amidon beaucoup plus élevée pour les fruits à pain développés durant la saison la plus sèche est un résultat très original. La connaissance du cycle de développement des fruits à pain à la Martinique a été décrite pour une première fois, permettant de déterminer une période de récolte optimisée par rappo

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Mikolaitis, Šarūnas. "Evoliuciniai cheminės sudėties efektai padrikųjų spiečių raudonosiose milžinėse." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120913_085509-91530.

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Padrikieji spiečiai naudojami astrofizikoje, tiriant Galaktikos disko cheminę raidą bei žvaigždžių evoliuciją. Spiečiaus žvaigždžių amžius, atstumas nuo Saulės, pirminė cheminė sudėtis yra apytiksliai vienodi, tad juos galima laikyti kosminėmis laboratorijomis. Pagrindinis disertacijos tikslas skirtas tirti maišymosi procesus evoliucionavusiose žvaigždėse. Siekiama įvertinti kaip maišymosi procesai paveikia 12^C/13^C ir 12^C/14^N gausų santykius ir palyginti su teoriniais maišymosi modeliais. Kitas tikslas skirtas prisidėti prie Galaktikos disko cheminės sudėties bei evoliucijos tyrimo. 12^C/1

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Hyrondelle, Helies. "Ordre/désordre anionique dans les hydroxyfluorures à base de Mg, Ni, Cu & Zn : corrélation composition/structure & propriétés physico-chimiques." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0496.

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Les hydroxyfluorures (HyFs) de métaux et de métaux de transition divalents sont des composés dans lesquels les ligands hydroxyles (OH-) et fluorures (F-) sont présents simultanément dans la sphère de coordination du métal. Les similarités entre ces anions (taille, valence, préférences cristallographiques) facilitent leur substitution tandis que leur importante différence d'électronégativité/de polarisabilité permet de contrôler finement la nature des liaisons chimiques au sein du matériau. Ces variations influencent de nombreuses propriétés physiques comme l'acido-basicité, la stabilité thermi

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Joly, Muriel. "Interactions microorganismes-nuage : activité glaçogène et survie." Thesis, Clermont-Ferrand 2, 2013. http://www.theses.fr/2013CLF22424/document.

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Pendant longtemps, les microorganismes présents dans l’atmosphère n’ont été considérés qu’en tant que particules inertes subissant les conditions hostiles de cet environnement. Cependant, de récentes études mettant en évidence la présence de microorganismes métaboliquement actifs dans la phase aqueuse des nuages incitent à s’interroger sur le rôle que ces organismes pourraient avoir sur les processus physiques et chimiques des nuages. En effet, la formation de gouttelettes de nuage ou de cristaux de glace à des températures supérieures à -36°C nécessite la présence de particules dites « noyaux

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Menezes, Walmir Marques de. "Efeito da modificação térmica em escala industrial na qualidade da madeira de Tectona grandis Linn. F." Universidade Federal de Santa Maria, 2017. http://repositorio.ufsm.br/handle/1/12860.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The process of the thermal modification on wood is the application of heat in order to improve its quality. The objective of this research was to evaluate the effect of the thermal modification in industrial scale on the wood quality of Tectona grandis Linn. F. To this end, boards of approximately 35 x 100 x 2200 mm (thickness, width and length), separated and numbered in quality classes. First-class boards were with the highest presence of core and free of defects, such as cracks, knots, warps, among others, while the seco

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Garbarienė, Inga. "Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264.

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Disertacija skirta smulkiosios aerozolio dalelių frakcijos šaltinių, fizikinių ir cheminių savybių įvertinimui kompleksiškai apjungiant įvairius tyrimo metodus. Darbe susieti elementinės ir organinės anglies koncentracijų pokyčiai su tolimąja oro masių pernaša, įvertinta regiono bei vietinių šaltinių įtaka bendrai aerozolio dalelių taršai. Aprašyti anglies turinčių aerozolio dalelių pasiskirstymai pagal dydį foninėse vietovėse ir miesto aplinkoje. Naudojant aerozolio masių spektrometrą Preilos atmosferos užterštumo tyrimų stotyje buvo identifikuotas biogeninis organinių medžiagų šaltinis, kuri

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BALDACIM, SANDRO A. "Desenvolvimento, processamento e caracterizacao de compositos ceramicos Sisub(3)Nsub(4)-SiCsub(w)." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10877.

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Made available in DSpace on 2014-10-09T12:45:01Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:20Z (GMT). No. of bitstreams: 1 07007.pdf: 10191940 bytes, checksum: 90f949a8767cea7a6c8e8cc3d2aee4ee (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Bezerra, Maria de F?tima. "Caracteriza??o f?sico-qu?mica, reol?gica e sensorial de iogurte obtido pela mistura dos leites bubalino e caprino." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15786.

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Made available in DSpace on 2014-12-17T15:01:21Z (GMT). No. of bitstreams: 1 MariaFB_DISSERT.pdf: 1170846 bytes, checksum: 98c54baa49841a83467430bc92e8e41c (MD5) Previous issue date: 2010-02-25<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Milk from different animals can be used for dairy production. Yoghurt is a popular fermented milk product and considered to be one of the greatest importance in terms of consumer acceptance and consumption. The present research deals with the production of strawberry set-type yoghurt by mixing goat and buffalo s milk and it has the obje

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LOPES, Fabiana de Araújo. "Caracterização da produtividade e da qualidade do leite de búfalas na Zona da Mata Sul de Pernambuco." Universidade Federal Rural de Pernambuco, 2009. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6747.

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Submitted by (edna.saturno@ufrpe.br) on 2017-04-11T11:57:45Z No. of bitstreams: 1 Fabiana de Araujo Lopes.pdf: 169859 bytes, checksum: e28a6a559e415f8653071859482231da (MD5)<br>Made available in DSpace on 2017-04-11T11:57:45Z (GMT). No. of bitstreams: 1 Fabiana de Araujo Lopes.pdf: 169859 bytes, checksum: e28a6a559e415f8653071859482231da (MD5) Previous issue date: 2009-02-17<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>This work had objective to characterize the production and constituent of buffalos milk in the southern Zona da Mata de Pernambuco and to evalua

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Pinto, Alessandra Teixeira Barbosa. "CARACTERIZAÇÃO DE VARIEDADES DE MILHO CRIOULO CULTIVADAS NA REGIÃO DOS CAMPOS GERAIS PARA UTILIZAÇÃO AGROINDUSTRIAL." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2009. http://tede2.uepg.br/jspui/handle/prefix/677.

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Made available in DSpace on 2017-07-21T18:53:12Z (GMT). No. of bitstreams: 1 Alessandra Pinto.pdf: 1036380 bytes, checksum: 145aa947b54d1a79e71d50c0289d9b43 (MD5) Previous issue date: 2009-04-02<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The corn crop is one of the most important of Brazil in relation to the amount produced yearly and its destination. It has great commercial importance in animal nutrition and also in the food industry. Every year farmers search for higher agricultural yields, having as main partner the breeding programs. Regarding this aspect, the resc

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Ara?jo, Cynthia Gabriela Fernandes de. "Caracter?sticas da carca?a e qualidade da carne de ovinos terminados em pastagens cultivadas." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17177.

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Made available in DSpace on 2014-12-17T15:34:46Z (GMT). No. of bitstreams: 1 CynthiaGFA_DISSERT.pdf: 579676 bytes, checksum: a64cd9a0438cbc31d01a8c8988a7d1bd (MD5) Previous issue date: 2012-07-20<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The objective of this study was to evaluate the quality of housing and the physical and chemical characteristics of meat from sheep raised on pasture Brachiaria brizantha and Panicum maximum. The experiment was conducted in the physical area of the Study Group on Forage (GEFOR), located in the Academic Unit Specialized in Agricultural

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Dodangoda, Maneesha T. "Improving the fire resistance of cold-formed steel frame wall systems using enhanced plasterboards." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/122456/1/Maneesha_Dodangoda_Thesis.pdf.

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This thesis combines the knowledge of science and engineering to develop gypsum based plasterboards for enahnced fire resistance in conjuction with light gauge steel framed (LSF) wall systems. Thermo-physical property tests, fire tests, mechanical property tests and heat transfer numerical modelling were used as the main tools of this research. The thesis developed a new gypsum-based plasterboard with enhanced fire resistance using a locally mined filler material, diatomite, which can improve the Fire Resistance Levels of single and double plasterboard lined LSF wall systems significantly.

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48

Richomme, Fabienne. "Etude expérimentale des propriétés structurales et magnétiques de multicouches fer/terbium : modulation de composition, anisotropie magnétique, effet d'irradiation aux ions." Rouen, 1996. http://www.theses.fr/1996ROUES008.

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Les multicouches Fe/Tb peuvent présenter une forte anisotropie magnétique perpendiculaire nécessaire à la réalisation d'un milieu d'enregistrement magnétique haute densité. Les multicouches étudiées ont été élaborées, soit par pulvérisation cathodique RF, soit par évaporation sous ultra-vide, puis caractérisées par spectrométrie Mössbauer par électrons de conversion, par diffraction de rayons X aux petits angles et grands angles et par mesures d'aimantation. Le grand nombre d'échantillons pulvérisés étudies a permis d'établir un diagramme précis des caractéristiques structurales et magnétiques

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49

Ouafo, Mendo-Leumbe Marie-Roumy. "Etude de la composition physico-chimique, des sources émettrices et des effets sur la santé humaine des aérosols atmosphériques en zones rurales et urbaines en Afrique tropicale." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30402.

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Ce travail de thèse s'inscrit dans le cadre du programme INDAAF (International Network to study Deposition and Atmospheric chemistry in AFrica). Il a pour objectif d'étudier la physico-chimie des aérosols atmosphériques prélevés sur deux sites ruraux africains peu perturbés et représentatifs des écosystèmes de forêt (site de Nsimi au Cameroun) et de savane humide (site de Djougou au Bénin). Les aérosols prélevés hebdomadairement dans les fractions PM2,5 et PM10 à Nsimi de 2004 à 2009 et à Djougou de 2005 à 2009 ont été analysées, afin de caractériser les variations saisonnières des concentrati

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50

Hebibi, Nadra. "Donnees de morphometrie branchiale dans quelques cas d'adaptation chez la truite arc-en-ciel." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13086.

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