Дисертації з теми "Bos species"
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Bos, Merijn M. "Insect diversity and trophic interactions in shaded cacao agroforestry and natural forests in Indonesia." Doctoral thesis, [S.l.] : [s.n.], 2006. http://webdoc.sub.gwdg.de/diss/2006/bos.
Повний текст джерелаRocha, Carolina Camargo. "Avaliações ultrassonográficas, morfométricas e histológicas testiculares de touros Bos taurus taurus submetidos a insulação escrotal sob o tratamento sistêmico com antioxidante e suplementado com ácidos graxos poli-insaturados." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/10/10131/tde-01072013-112224/.
Повний текст джерелаSeveral studies indicate an increased susceptibility to the heat stress in European bulls raised under tropical conditions, which leads to deleterious effects on reproduction (e.g., testicular degeneration, impaired sperm quality). This may cause significant economic losses since, in these regions, breeding season usually occurs during summer. The main mechanism proposed to explain such event is the oxidative stress. Therefore, an alternative to overcome this effect would be the treatment with antioxidant combined with a supplementation with poly-unsaturated fatty acids (PUFA). The present study aimed to evaluate the possible beneficial effect of the oral PUFA supplementation combined with a protective antioxidant treatment to overcome the deleterious effects of the heat stress on testicular echogenicity, morphometry (i.e., volume, circumference, consistency) and histology. Towards this aim, 16 young but sexually mature Bos taurus taurus (around 2 years old). All animals were submitted to testicular warming for 96 hours. Simultaneously to the insulation, animals were randomly allocated into 4 groups in a 2x2 fatorial design. One of the factors was a PUFA supplementation (supplemented vs. nonsupplemented; Megalac E®) everyday for two months. The other factor was a systemic treatment with a subcutaneous administration of 5 mL of α-tocopherol (treated vs. non treated) every 13 days for two months. Animal that did not receive the treatment were injected with 5 mL of inert oil. Testicular ultrasound evaluation was performed each 13 days from the beginning until two months after testicular warming. At the end of the period experimental period, animals were castrated and the testicles were submitted to histological evaluation. Data were statistically analyzed using the SAS system for Windows. Results indicated that oral PUFA supplementation combined with the systemic -tocopherol treatment had no influence on testicular echogenicity, morphometry and hystology in European bulls submitted to testicular warming.
Mburu, Francis Gérardin Philippe. "Etude et valorisation de différents bois du Kenya Study and valorization of different Kenyan wood species /." [S.l.] : [s.n.], 2007. http://www.scd.uhp-nancy.fr/docnum/SCD_T_2007_0057_MBURU.pdf.
Повний текст джерелаVAJANA, ELIA. "Studio della storia evoluzionistica e conservazione delle specie zootecniche attraverso analisi di genomica del paesaggio e modelli di nicchia ecologica." Doctoral thesis, Università Cattolica del Sacro Cuore, 2017. http://hdl.handle.net/10280/19085.
Повний текст джерелаBiodiversity is quickly disappearing due to human impact on the biosphere, and to market pressure. Consequently, the protection of both wild and domestic species needs to become a priority in order to preserve their evolutionary potential and, ultimately, guarantee a sustainable future for coming human generations. To date, tens of methods have been proposed to prioritize biodiversity for conservation purposes. Here, an ontology for priority setting in conservation biology is provided with the aim of supporting the selection of the most opportune methodologies given specific conservation goals. Further, two case studies are presented characterizing neutral and adaptive genomic diversity in water buffalo (Bubalus bubalis L.) and indigenous Ugandan cattle (Bos taurus L.), respectively. In particular, two independent domestication centres (North-western India and Indochina) and separate migration routes are suggested for the ‘river’ and ‘swamp’ water buffalo types. In the case of indigenous Ugandan cattle, the integration of species distribution modelling and landscape genomics techniques allowed the identification of PRKG1 and SLA2 as candidate genes for local adaptation to East Coast Fever, a vector-borne disease affecting bovine populations of Sub-Saharan Africa. Results are discussed for their implications in water buffalo conservation and Ugandan cattle adaptive management.
Greenup, Alison Laura. "Responses of peatland vegetation and methane flux to environmental change." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327727.
Повний текст джерелаLoizou, T. "Describing bog surfaces." Thesis, University of Dundee, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366994.
Повний текст джерелаCassata, Joseph Frank. "Relay Protection Scheme for Special Power Flow Controllers." Youngstown State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1595355623363128.
Повний текст джерелаSalter, Paul Andrew. "Novel bis(calix[4]arene) based systems for the selective recognition of anionic guest species." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365400.
Повний текст джерелаSewell, Laura Jane. "Exploring the reactivity patterns of cationic and neutral rhodium bis-phosphine species with amine-boranes." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:21b883f1-9ffd-4589-ad82-1243b988af91.
Повний текст джерелаLeite, Yuri L. R. "Evolution and systematics of the Atlantic tree rats, genus Phyllomys (Rodentia, Echimyidae), with description of two new species /." Berkeley, Calif. [u.a.] : Univ. of California Press, 2003. http://www.loc.gov/catdir/bios/ucal051/2004297025.html.
Повний текст джерелаBartsch, Annette. "Die Eisalgenflora des Weddelmeeres (Antarktis): Artenzusammensetzung und Biomasse sowie Ökophysiologie ausgewählter Arten = Sea ice algae of the Wedddell Sea (Antarctica): species composition, biomass, and ecophysiology of selected species /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1989. http://www.gbv.de/dms/bs/toc/016186044.pdf.
Повний текст джерелаRuuska, J. (Jari). "Special measurements and control models for a basic oxygen furnace (BOF)." Doctoral thesis, Oulun yliopisto, 2012. http://urn.fi/urn:isbn:9789514298028.
Повний текст джерелаTiivistelmä Tämän opinnäytteen tarkoitus oli tutkia teräskonvertterin valittuja erikoismittauksia ja kehittää malli ennustamaan teräksen lämpötilaa happipuhalluksen lopussa. Työn tarkoituksena oli lisätä tietämystä mittauksista ja ilmiöistä konvertterissa ja tällä tapaa lisätä mahdollisuuksia prosessin tehokkaampaan monitorointiin ja ohjaukseen. Erikoismittauksia tutkittiin lisätietämyksen saamiseksi niiden käytettävyydestä konvertteriprosessin ajossa. Mittausten analysointi tuotti myös uutta prosessitietämystä. Radioaaltointerferometrin (RWI) käyttö koettiin hyödylliseksi, koska on mahdollista havaita kuonan pinnankorkeuden nousu ennakkoon ja suorittaa joitakin korjaavia toimenpiteitä liiallisen kuohumisen ja lopulta roiskumisen estämiseksi ulos konvertterista. Äänimittaus voi myös havaita trendin ennakkoon, mutta huomattiin sen olevan herkkä ympäristön häiriöäänille. Roiskemittaus antaa tietoa kuonan sen hetkisestä tilasta, mutta ei ennakkoon. Mittaukset toivat kuitenkin esiin useita tekijöitä, jotka yleensä lisäävät roiskumista. Olisi parasta käyttää kahden eri mittauksen tietoa, RWI ja roiskemittaus, ennustettaessa lisääntyvää roiskumista, joka aiheuttaa huomattavia rautahäviöitä. Loppulämpötilan ennustamiseen kehitetyn mallin ja lisäainemallin kehittäminen antoi paljon tietoa tekijöistä, jotka vaikuttavat lämpötilaan. Tekijät, joita käytettiin ryhmittelyssä, olivat konvertterinumero, panoskoko ja loppuhiilipitoisuus. Mallin soveltamisesta huolimatta jäi edelleen useita sulatuksia, jotka eivät osuneet tavoitteeseen. On edelleen tarve teräskonvertterin lämpötilakäyttäytymisen ja sen hallinnan lisätutkimukselle konvertterissa. Myös lisäaineiden vaikutusta lämpötilaan olisi hyödyllistä tutkia systemaattisemmin. On edelleen muita tekijöitä, esimerkiksi hapen virtausnopeus ja lanssin korkeus, jotka vaikuttavat lämpötilaan, mutta jotka eivät ole mukana malleissa. Osa näistä tekijöistä on mitattavia suureita ja osa ei. Lisätutkimukselle on edelleen tilaa tällä alueella. Tämä työ vahvistaa edelleen käsitystä, että konvertteriprosessi on monimutkainen. Huomattiin, kuten aina prosessikehityksessä, että jatkuvaa kehitystyötä pitää tehdä prosessiolosuhteiden, raaka-aineiden ja ajopraktiikoiden muutosten huomaamiseksi. Muuten parannusten ja mallien antama hyöty heikkenee. Monitorointijärjestelmään olisi mahdollista kehittää rutiineja ja varoituksia operaattorien avuksi, jotta he huomaisivat järjestelmävirityksen tarpeen. Monitorointijärjestelmä toisi taloudellista hyötyä, mm. lisäpuhallusten vähentymisen, lopputuotteen paremman saannon ja laadun muodossa. Raaka-ainesäästöjä voidaan saavuttaa prosessin ohjattavuuden parantuessa. Monitorointijärjestelmän sisältäessä sääntötietokannan, se luo hyvän pohjan uusille työntekijöille tutustua prosessiin ja näin heidän koulutuksensa onnistuisi helpommin
Köchy, Martin, and Sven Bråkenhielm. "Separation of effects of moderate N deposition from natural change in ground vegetation of forests and bogs." Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/1662/.
Повний текст джерелаDorrien, Christian F. von. "Ökologie und Respiration ausgewählter arktischer Bodenfischarten = Ecology and respiration of selected Arctic benthic fish species /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1993. http://www.gbv.de/dms/bs/toc/127460144.pdf.
Повний текст джерелаBarron, II Joseph Charles. "Bog Turtle Distribution in Virginia: Assessing Proposed Methods for Finding New Localities and Examining Movement Between Wetlands." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/104160.
Повний текст джерелаMaster of Science
Freshwater turtles are facing population declines worldwide, and the bog turtle Glyptemys muhlenbergii is among the most imperiled in North America. Bog turtles occupy naturally small, specialized wetlands called Appalachian Mountain fens. The prevalence of fens on the landscape has declined over recent decades due to agricultural practices. Although there is a strong need to document and monitor bog turtle populations due to their threatened status, bog turtles are difficult to find due to their small size and ability to burrow completely into substrate. Thus, considerable effort must be expended to find populations and track their status. The first overall objective of this thesis was to assess methods for locating populations of bog turtles. My first chapter tests a habitat distribution model that uses publicly available landscape data such as topopgraphy and land cover to predict areas likely to contain turtles. To do this, I systematically surveyed 49 predicted sites multiple times each over 2 years. Simultaneously, I recorded variables such as the time of year, size of the wetland and the weather to determine whether any factor significantly explained the ability to find turtles on any given survey. In addition, I was able to record several variables relating to wetland quality and isolation that were not in the initial model. I found that larger wetlands were easier to search than smaller wetlands, possibly due to larger sites having more turtles, and that wetlands near more impermeable surfaces (such as roads and buildings) were less likely to have bog turtles. As another potential method to find bog turtles and assess sites, we tested the use of 'pristine indicator' plants as a metric for potential wetlands. Mountain fens have specific attributes, such as high groundwater influence and exposure to a large amount of sunlight. Several species, including the bog turtle, are specialized to these factors and are rarely found in the surrounding landscape. Because a distinct community exists for mountain fens in this region, sites with a higher diversity of fen specialist plants may be indicative of a higher quality site which can support more specialists, including the bog turtle. My second chapter tests this hypothesis. I first chose a list of species that would most likely have habitat requirements similar to those of bog turtles. Then, at 12 sites I documented every plant species I encountered within the wetland. I compared the plant community as a whole between bog turtle-occupied and unoccupied sites and found no significant difference between the two. When I narrowed my analysis to focus on plants I previously identified as sharing habitat requirements with the bog turtle, I found a strong pattern of their co-occurrence with bog turtles. This lends support to the idea that these 'pristine indicator' plants could be used as a tool to better evaluate sites that may have bog turtles. My last chapter investigates movement of bog turtles in a landscape impacted by human development. Movement of turtles between adjacent wetlands is critical to maintaining long term regional viability of the species, as it lets turtles colonize new sites and exchange genes. Despite the importance of these movements, records of turtles moving long distances between two wetlands is scarce in the literature, likely due to the lack of long-term studies for areas with multiple adjacent wetlands. One method of recording movements is by marking turtles with a unique ID and recording where it was encountered as wetlands are surveyed on the landscape. In Virginia, this procedure has been conducted at multiple sites over 32 years. To understand the prevalence of movement between sites for this species, I examined this dataset and examined all instances of a turtle being found at a site different from its last capture. I recorded the straight-line distance moved for each recorded movement as well as the sex of the turtle, to test if either sex was more or less likely to undertake these movements. Then, for a subset of movements, I calculated least-cost pathways, a metric that accounts for landscape features and plots the easiest route for turtles to move. This way, I could evaluate the prevalence of barriers to movement, such as roads or development, on the landscape. I found 21 documented movements among sites over 32 years of monitoring. Neither sex was more likely to move further than the other. Compared to studies looking at other freshwater turtles, the observed rate of movement appeared low, but this was likely an underestimate due to the difficulty of capturing specific individuals. I also found evidence of significant barriers to movement in 13 out of 17 evaluated least-costs paths, usually roads or driveways. Finally, to examine how movement affects bog turtle distribution, I describe a methodology of testing if adjacency to known populations influences the probability of a new site being occupied by turtles. I demonstrate the plausibility of the method by applying it to a map of occurrences collected over this study and show that it can account for habitat differences and barriers to movement between sites as well. However, limitations in my sampling scheme limit conclusions from my dataset. Together, these findings will help future managers find where turtles are and which sites may be connected. These results will help managers make more informed decisions for managing bog turtles at a statewide level.
Nurhayati, Niknik. "Identification, molecular cloning and characterisation of homospermidine synthase and deoxyhypusine synthase from Phalaenopsis and Crotalaria species /." Göttingen : Cuvillier, 2004. http://www.gbv.de/dms/bs/toc/385141416.pdf.
Повний текст джерелаForell, Burkhard. "A methodology to assess species yields of compartment fires by means of an extended global equivalence ratio concept." Braunschweig : Techn. Univ., Inst. für Baustoffe, Massivbau und Brandschutz, 2007. http://www.gbv.de/dms/bs/toc/527844802.pdf.
Повний текст джерелаOdounga, Bernard. "Etude de la fissuration des bois tropicaux par mesures des champs." Thesis, Université Clermont Auvergne (2017-2020), 2018. http://www.theses.fr/2018CLFAC015/document.
Повний текст джерелаThe objective of the present work is to study experimentally and numerically the crackingbehavior of tropical woods from the Gabonese forest, namely : Milicia excelsa (iroko), Aucoumeaklaineana pierre (okume) and Pterocarpus soyauxii (padouk). This study focuseson the crack growth process in crack opening mode and mixed mode of these three speciesusing Modified Tension Shear (CTS) and Mixed Mode Crack Growth (MMCG) specimens.The specimens are mounted in an Arcan system and placed in an electromechanical testingmachine. The grid method is used to measure the displacement and strains fields near the tipcrack. These maps make it possible to obtain the opening and the length of the crack duringthe tests. The curves force showing the face as a function of the crack opening are deducedfrom the measurements. The experimental critical energy release rate G is evaluated by thecompliance method in imposed displacement. The results show an effect of the thickness oncracking. These results also made it possible to demonstrate a proportionality of the densitywith the parameters of rupture of these species. In mixed mode, after decoupling the modes(separation of mode 1 and mode 2), the values of G are presented as a function of to the cracklength. For Okume, for example, it was observed that the ratios of the energy release ratesof the two modes are constant, which justifies the intrinsic character of the cracking parameterswere obtained. Comparisons made with results from the literature review on temperatespecies of the same density showed similarities
Dyck, Barbara S. "The species composition, aboveground biomass and carbon content of vegetation in two basin bogs in the Experimental Lakes area, north-western Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ32097.pdf.
Повний текст джерелаGoedhart, Christian Leonard. "Influence of osmotic stress, ethanol, and a substituted pyridazinone, BAS 13-338, on the growth and lipid composition of two Chlorella species." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/53634.
Повний текст джерелаPh. D.
Kurbjeweit, Frank. "Reproduktion und Lebenszyklen dominanter Copepodenarten aus dem Weddellmeer, Antarktis = Reproduction and life cycles of dominant copepod species from the Weddell Sea, Antarctica /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1993. http://www.gbv.de/dms/bs/toc/128903694.pdf.
Повний текст джерелаMakio, Haruyuki. "A Study of Active Species and Stereo-, Regio-, and Substrate- Selectivity in Olefin Polymerization Mediated by Bis(salicylaldiminato) Group 4 Transition Metal Catalysts." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142259.
Повний текст джерелаMvogo, Jean Kisito. "Regroupement mécanique par méthode vibratoire des bois du bassin du Congo." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13790/document.
Повний текст джерелаThis Ph.D. work deals with a non-destructive experimental approach organizing the species of the Congo basin in four groups according to the likeness of their main mechanical properties, and to guarantee for each group the 5th percentile characteristic value of mechanical properties such as the modulus of elasticity (MOE). For the sustainable management of forest and conservation of exotic biodiversity of the Congo basin, it is necessary to promote the exploitation of less-consumed species with equivalent mechanical characteristics. The aim of the present work is to propose a scheme for grouping species with similar values of modulus of elasticity (MOE) obtained through vibratory method. Only small clear specimens are tested. The assignment of a given specie to one of the four groups takes place in return for a homogeneity test of comparison of the random variables of species to the random variable of the group. Results of the present grading show that some species can be interchangeably consumed in the construction industry and that the procedure must include more species of the Congo basin. This property grouping will facilitate substitution of underutilized species for ones that are being more exploited. Thus, wood designers and constructors might have a wide variety of choices in their decision-making while promoting less-consumed species and reducing the demand of traditionally most wanted extinguishable species. The MOE obtained by intrinsic vibration of wood versus is not influenced by moisture content. So, the non destructive method bases on longitudinal vibrations can be used in industrial production of timber to certify the modulus of rupture (MOR) at 12% moisture content of green wood by direct correlation. Finally, we propose a grading system of tropical wood
Saha, Tchinda Jean-Bosco. "Caractérisation et valorisation des substances extractibles de cinq essences camerounaises majeures de l'industrie du bois : Ayous, Moabi, Movingui, Padouk et Tali." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0113/document.
Повний текст джерелаIn this work, the accelerated technical ASE 200 and Soxhelet was used to evaluate the amount of extractives contained in five Cameroonian wood species. The amount of extractives ranged from 4.4 to 17.7% with respect to oven-dry matter. Phytochemical screening of the extractives revealed the presence of polyphenols, saponins, flavonoïds, sterols and terpenes. The total phenolic content of the extracts was measured by the Folin-Ciocalteu method using gallic acid as standard. The phenolic content ranged from 16.5 to 165.83 mg eq gallic acid/g of extract. The condensed tannins, evaluated by colorimetric method, ranged from 0.15 to 23.61 g cyanidin equivalents/100 g of dry matter. GC-MS identified the homopterocarpine and pterocarpin as major compound in extracts of padouk. Catechin, gallic acid and pyrogallole were the major compounds found in the extracts of tali. Extracts of movingui consisted mainly of diterpenes and several compounds not readily identifiable. Gallic acid, squalene and triterpenes were the predominant compounds identified in the extracts of movingui. The natural durability of wood was evaluated using the European Standard EN 350-1. Mass losses increased when the wood samples were extracted. Mass losses of non-extracted samples ranged from 0.1 to 59% (with beech taken as a reference). The effect of extractives on fungal growth showed that at 250 ppm concentrations, the extracts were fungistatic and that at 500 ppm concentrations, the extracts of tali were fungicidal.Valorization of the extractives in the food and the textile industries was attempted. In food, the antioxidant activity of the extracts by inhibition of methyl linoleate induced by AIBN was evaluated. The results obtained were satisfactory because all the extracts showed antioxidant activity which varied from 10 to 86%. Then the anti-radical capacity of our extracts was assessed by the DPPH method. The concentration necessary to consume 50% of DPPH varied from 2.7 to 60.5 mg/L. Aqueous and alkaline extracts were used to dye natural and artificial fibers. The coloration taken by the fibers was measured using a Datacolor D65°10 apparatus. These extracts gave a yellow color with extracts of movingui and a red color with extracts of padouk. The effect of extractives on bacteria growth showed that the extracts were bacteriostatic at the tests concentrations
Pucker, Boas [Verfasser]. "De novo Nd-1 genome assembly reveals genomic diversity of Arabidopsis thaliana and facilitates genome-wide non-canonical splice site analysis across plant species / Boas Pucker." Bielefeld : Universitätsbibliothek Bielefeld, 2019. http://d-nb.info/1188812432/34.
Повний текст джерелаRahayu-Sekartiing, Istie. "Characteristics of lathe check and surface roughness of fast growing wood veneers and their performance on laminated veneer lumber." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0034/document.
Повний текст джерелаThe development of plantation and community forest to meet wood demand in society has produced fast growing wood species. The research objectives were 1) to determine demarcation point/transition age between juvenile and mature wood on sengon (Falcataria moluccana), jabon (Anthocephalus cadamba Miq.), poplar (Populus sp) and douglas fir (Psedotsuga menzii); 2) to analyze the effect of juvenility on lathe check, surface roughness and wettability; 3) to analyze the effect of lathe check and juvenility on glue bond strength and laminated veneer lumber (LVL) bending properties; and 4) to apply a new analytical model to determine the variation of specific MOE LVL values of sengon and jabon from pith to bark. Based on fiber length trait, the demarcation point between juvenile and mature wood were approximately at segmented rings 17th (sengon) and at segmented ring 24th (jabon). While, transition age of poplar cultivars and douglas-fir, transition age happened approximately at 12 years old and 18 years old, respectively. The results showed that wood near pith on sengon and jabon resulted veneers with higher lathe check, rougher surface and high wettability, while wood near bark resulted veneers with lower lathe check, smoother surface and low wettability. Glue bond strength, Specific MOE (SMOE) and Specific MOR (Modulus of Rupture) of sengon and jabon LVL were decreased as the frequency of lathe check increased or those strength values increased from pith to bark. The advantage of using poplar veneers from mature wood was proved with an improvement of 15 to 20% on average for mechanical properties, while for douglas-fir, was 7 to 22%. An analytical model was used to predict the variation of the LVL mechanical characteristics using different scenarios. According to the context of this study assumed to be close to the Indonesian resource there is no need to sort veneers since most of the tree is juvenile wood for logs no older than 7
Belyaeva, Maria [Verfasser]. "Effects of multiple abiotic stressors on the species and genetic biodiversity of littoral Cladocera in two types of acidic habitats in Germany: hard-water mining lakes and soft-water bog lakes / Maria Belyaeva." Aachen : Shaker, 2013. http://d-nb.info/1049382838/34.
Повний текст джерелаAnjos, Jeniffer Natalie Silva dos. "Desenvolvimento regional da área de livre comércio de Boa Vista e suas implicações socioespaciais a partir de um estudo geoestratégico." Universidade Federal de Roraima, 2014. http://www.bdtd.ufrr.br/tde_busca/arquivo.php?codArquivo=251.
Повний текст джерелаCom o objetivo de construir um estudo sobre a Área de Livre Comércio de Boa Vista a partir da política de integração regional para a Amazônia Ocidental, a presente pesquisa discorre sobre os aspectos de interdependência na composição das esferas intra-regionais e inter-regionais resultantes das ações de regionalização programadas pelo Estado nacional para as áreas que apresentam diferenças regionais impactantes na sua economia em comparação as demais regiões brasileiras. Com base nas leis de criação e regulamentação da área de livre comércio de Boa Vista a pesquisa se fundamenta na concepção de ações políticas para o desenvolvimento das áreas localizadas em circuitos econômicos inferiores e dependentes de escalas com economias especializadas. Fundamentando-se no conceito de políticas de desenvolvimento regional a cidade Boa Vista é avaliada como local receptor de ações estatais impostas a nível hierárquico. Nessas condições o regime aduaneiro especial do tipo área de livre comércio é avaliado como uma política de integração e de desenvolvimento regional fracassada, apresentando não mais que uma ação compensatória ao desgaste e inércia econômica do estado de Roraima. Estabelecidas sobre as alternativas de desenvolvimento pulverizadas pelo Estado e pelas elites regionais as tímidas transformações socioeconômicas na cidade não resultam da eficácia do modelo de desenvolvimento proposto para a Amazônia e em especial para Boa Vista.
Aiming to introduce a study about the Trade free Area in Boa Vista -RR from the regional integration policy for the Western Amazon perspective, this research discusses the aspects of interdependence in the composition of intra - regional and inter - regional levels resulting from actions regionalization programmed by the national government for the areas that present striking regional differences in its economy compared to other Brazilian regions. Based on the laws of creation and regulation of the free trade area of Boa Vista, this research is based on the design of policies for the development of areas located in lower economic circuits and dependent of scales with specialized economies. Basing on the concept of regional development policies the city of Boa Vista is evaluated as receptor of State actions imposed in a hierarchical level. Under these conditions the special customs regime of free trade area type is reported as an integration policy and failed regional development, presented no more than a compensatory action due the economic inertia and inroad of the state of Roraima. Established on alternative of development sprayed by state and regional elites, little socioeconomic transformations in the city do not result in the efficiency of development model proposed for the Amazon and in particular for Boa Vista.
Belmerhnia, Leïla. "Approches parcimonieuses pour la sélection de variables et la classification : application à la spectroscopie IR de déchets de bois." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0039/document.
Повний текст джерелаIn this thesis, innovative techniques for sorting wood wastes are developed. The idea is to combine infrared spectrometry techniques with robust data processing methods for classification task. After exposing the context of the work in the first chapter, a state of the art on the spectral data classification is presented in the chapter 2. The third chapter deals with variable selection problem using sparse approaches. In particular we propose to extend some greedy methods for the simultaneous sparse approximation. The simulations performed for the approximation of an observation matrix validate the advantages of the proposed approaches. In the fourth chapter, we develop variable selection methods based on simultaneous sparse and regularized representation, to increase the performances of SVM classifier for the classification of NIR spectra and hyperspectral images of wood wastes. In the final chapter, we present the improvements made to the existing sorting systems. The results of the conducted tests using the processing software confirm that significant benefits can be achieved in terms of recycled wood quantities
Belyaeva, Maria [Verfasser], and Brigitte [Akademischer Betreuer] Nixdorf. "Effects of multiple abiotic stressors on the species and genetic biodiversity of littoral Cladocera in two types of acidic habitats in Germany : hard-water mining lakes and soft-water bog lakes / Maria Belyaeva. Betreuer: Brigitte Nixdorf." Cottbus : Universitätsbibliothek der BTU Cottbus, 2013. http://d-nb.info/1045604127/34.
Повний текст джерелаNickel, Jörg. "Bentho-pelagische Kopplungsprozesse im arktischen Mellemfjord (Westgrönland) unter besonderer Berücksichtigung benthischer Peracarida (Malacostraca, Crustacea) = Benthic-pelagic coupling in the Arctic Mellemfjord (West-Greenland) with special focus on benthic Peracarida (Malacostraca, Crustacea) /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 2004. http://www.gbv.de/dms/bs/toc/470608676.pdf.
Повний текст джерелаLütkemeier, Thomas. "Chez soi - the aesthetic self in Arthur Schopenhauer, Walter Pater and T.S. Eliot : a study in the aesthetic theories of Schopenhauer, Pater and Eliot, with special regard to notions of selfhood, time and influence /." Würzburg : Königshausen & Neumann, 2001. http://www.gbv.de/dms/bs/toc/331784688.pdf.
Повний текст джерелаSilva, Gabriela Bueno Bittencourt. "Comunidades de Anf?bios Anuros Insulares do Litoral Sudeste do Brasil: Composi??o Taxon?mica e Rela??es com a Hist?ria de Forma??o das Ilhas." Universidade Federal Rural do Rio de Janeiro, 2011. https://tede.ufrrj.br/jspui/handle/jspui/1150.
Повний текст джерелаMade available in DSpace on 2016-08-03T11:52:14Z (GMT). No. of bitstreams: 1 2011 - Gabriela Bueno B. Silva.pdf: 16499028 bytes, checksum: f77bf195f420f4227c29b60a75895d0d (MD5) Previous issue date: 2011-04-15
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil.
BITTENCOURT-SILVA, Gabriela Bueno. Insular Anuran (Amphibia) Communities of the Southeast Coast of Brazil: Taxonomic Composition and Relationship to the History of the Islands. 2011. 72p. Dissertation (Master of Science in Animal Biology). Instituto de Biologia, Departamento de Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2011. A data set containing a list of the known species of frogs that occur near shore and on eight islands of the south coast of the State of Rio de Janeiro and north of the State of S?o Paulo was produced. For that, I compiled data from the literature and conducted inventories of a few of the islands. This list included 67 anuran species belonging to 11 families for eight islands and 117 species and 14 families for two localities on the mainland. The pattern of richness between islands was analyzed in respect to the island area and the composition of habitats used by the anurans for reproduction. Insular structural complexity was also evaluated in this regard. The results of correlation analyses of area vs. species richness and species richness vs. number of reproductive habitats were highly significant indicating that species richness prediction in fragmented environments depends on both factors. Nestedness analyses using the metric NODF was performed in an attempt to investigate whether shared species absences among the islands are the result of a random process or represents a pattern indicative of ordered loss of species. The predicted pattern was confirmed ? that is, that species loss is nonrandom and that this was possibly caused by habitat loss. The role played by climatic events at the beginning of the Holocene and of the availability of reproductive habitats in the islands upon species loss is discussed. Furthermore, it is discussed how these results can help to guide conservation strategies of anuran species.
BITTENCOURT-SILVA, Gabriela Bueno. Comunidades de Anf?bios Anuros Insulares do Litoral Sudeste do Brasil: Composi??o Taxon?mica e Rela??es com a Hist?ria de Forma??o das Ilhas. 2011. 72p. Disserta??o (Mestrado em Biologia Animal). Instituto de Biologia, Departamento de Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2011. Atrav?s de invent?rios e compila??o de dados da literatura levantou-se a composi??o de esp?cies de anf?bios anuros de oito ilhas, sendo seis da Costa Verde do Estado do Rio de Janeiro e duas do litoral norte do Estado de S?o Paulo. Al?m das ilhas, foram tamb?m compilados da literatura os invent?rios de duas comunidades representativas do litoral dos dois Estados. Adicionalmente, foram registradas 67 esp?cies, pertencentes a 11 fam?lias de anuros nas ilhas e 117 esp?cies e 14 fam?lias para o continente. O padr?o de distribui??o de riqueza das ilhas foi avaliado em rela??o ? ?rea das ilhas, ? composi??o de ambientes usados pelos anuros para reprodu??o e ? complexidade estrutural das ilhas. As an?lises de correla??o da riqueza de esp?cies vs. ?rea e riqueza de esp?cies vs. n?mero de ambientes reprodutivos apresentam resultados significativos, que s?o indicativos que a riqueza de esp?cies em ambientes fragmentados depende da intera??o de ambos os fatores. A fim de avaliar se as aus?ncias compartilhadas de esp?cies entre as ilhas ocorrem ao acaso ou encontram-se estruturadas, realizou-se uma an?lise de aninhamento com o aux?lio da m?trica NODF. O padr?o previsto foi confirmado e a perda de diversidade ? discutida em rela??o ? eventos clim?ticos do in?cio do Holoceno e ? disponibilidade de ambientes reprodutivos nas ilhas. Discute-se ainda como os resultados desse estudo podem servir para orientar programas de conserva??o de esp?cies de anf?bios anuros
Azevedo, Tânia Maria Paula de. "A AVALIAÇÃO DA APRENDIZAGEM NO PROCESSO DE ESCOLARIZAÇÃO DE ALUNOS COM DÉFICIT INTELECTUAL NOS ANOS FINAIS DO ENSINO FUNDAMENTAL E DO ENSINO MÉDIO." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/6950.
Повний текст джерелаEsta dissertação insere-se na Linha de Pesquisa de Educação Especial do Programa de Pós-Graduação da Universidade Federal de Santa Maria. A temática central foi a avaliação da aprendizagem de alunos com déficit intelectual em escola que preconiza a inclusão de alunos com necessidades educacionais especiais no processo de escolarização. Ao problematizar a avaliação de alunos com déficit intelectual incluídos em turmas de anos finais do Ensino Fundamental e do Ensino Médio numa escola pública estadual do município de Santa Maria/RS, objetivou-se identificar como se processa a avaliação da aprendizagem desses alunos, realizada por professores de diferentes áreas nas turmas referidas e conhecer os resultados das avaliações dos alunos no contexto investigado. O estudo caracteriza-se pela abordagem descritiva e explanatória, utilizando-se dos princípios e procedimentos prescritos no Estudo de Caso, como metodologia de pesquisa. Os dados foram coletados a partir de entrevistas, documentos escolares e registros da prática pedagógica, convergindo na análise da prática da avaliação de aprendizagem, no contexto da inclusão. Referendaram o estudo os aspectos inerentes à avaliação da aprendizagem e o processo de organização da Educação Especial, contemplados nos documentos escolares. Constituíram unidades de análise as práticas avaliativas desencadeadas por professores, nas turmas onde havia alunos com déficit intelectual, sendo uma no Ensino Fundamental e outra no Ensino Médio. A referência das Boas Práticas em Educação Especial conduziu o estudo, consistindo critério para análise e interpretação dos dados, que resultam nas constatações de que: a avaliação da aprendizagem de alunos com déficit intelectual se efetiva através de estratégias diferenciadas ao nível da avaliação, dos objetivos e do ensino; o aluno com déficit intelectual necessita da mediação do professor para realizar as atividades que exijam a competência de abstração; a colaboração entre os professores de sala de aula e da Educação Especial é facilitadora da aprendizagem e fundamental na articulação da Educação Inclusiva.
Guyot, Virginie. "Rôle de la diversité des arbres dans la régulation des populations d’insectes défoliateurs en forêts matures d’Europe." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/14458/1/guyot_partie_1_sur_2_2.pdf.
Повний текст джерелаFu, Rong. "Biochemical and Spectroscopic Characterization of Tryptophan Oxygenation: Tryptophan 2, 3-Dioxygenase and Maug." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/chemistry_diss/44.
Повний текст джерелаMajchrzak, Yves. "Evolution des communautés végétales de marais tourbeux soumises au pâturage de bovins et d'équins : application pour la gestion conservatoire d'une zone humide, le marais de Lavours (Ain, France)." Grenoble 1, 1992. http://www.theses.fr/1992GRE10124.
Повний текст джерелаPooam, Marootpong. "The biological effects of applied magnetic fields on cryptochrome and response." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS062.
Повний текст джерелаCryptochromes are highly conserved blue-light-absorbing flavoproteins that have been linked to the perception of electromagnetic stimuli in numerous organisms. We mainly studied the mechanism for the interaction between magnetic fields and cryptochromes in the context of the radical-pair theory. We investigated the response of Arabidopsis cryptochrome-1 in vivo to a static magnetic field. The biological activities of cryptochrome were enhanced by the magnetic field. Interestingly, the effects of the magnetic fields could be observed even the magnetic field was given exclusively during dark intervals between light exposures. This finding indicated that the magnetically sensitive reaction step in the cryptochrome photocycle must occur during flavin reoxidation. Moreover, we also used frequency (RF) stimulated to Arabidopsis cryptochrome as the diagnostic tools to confirm the radical-pair hypothesis. In the study, we found a disruptive effect of RF on the activity of cryptochrome. Our findings could confirm the occurrence of the radical-pair mechanism and the involvement of cryptochrome for magnetoreception. Additionally, we also showed a disruptive effect of the low-level static magnetic field (LLF) condition where the external magnetic fields were almost eliminated. The result of this condition was consistent with the effect of RF exposure. Furthermore, we also reported that LLF could increase the expression of some PEMF-induced genes in human cells. This finding could provide the evidence to support the effect of magnetic, not induced electric fields in human physiology
AGUZZI, GIULIA. "Lingue straniere e sordità: un percorso possibile." Doctoral thesis, Università Cattolica del Sacro Cuore, 2020. http://hdl.handle.net/10280/78940.
Повний текст джерелаThis work aims to guide the foreign language teacher trough the literature on special education needs and deafness, the available tools, and the modeling for everyday practice to encourage the inclusion of deaf students until now considered not teachable. In the first and second chapters, the theoretical approaches to deaf students learning are presented in the contexts of special language teaching, special education, and disabilities. The third and fourth chapters represent the application of those principles to include deaf students in the language classroom activities following the operational models usually used for different learning disabilities. The last chapter offers the concrete model that may guide teachers from their deaf students' needs analysis and the correct material choice for them, passing through the learning project management to get to the specific class lessons, in collaboration with support staff members.
Koh, Meng hock. "Fission-barriers and energy spectra of odd-mass actinide nuclei in self-consistent mean-field calculations." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0208/document.
Повний текст джерелаWhile there have been numerous microscopic calculations on fission barriers of even-even compoundnuclei, there are however, relatively few such work dedicated to odd-mass nuclei. This is dueto the complications posed by the breaking of the time-reversal symmetry at the mean-field leveldue to the presence of an unpaired nucleon. In order to circumvent this difficulty, previous fission barriercalculations of odd-mass nuclei have been performed by neglecting the effect of time-reversalsymmetry breaking. This work aims to improve on the description of fission barriers as well asthe spectroscopic properties of ground and fission-isomeric state, of some odd-mass actinide nucleiby taking the effect of time-reversal symmetry breaking into account. This has been perfomedwithin a Skyrme-Hartree-Fock-plus-BCS framework with blocking, where the BCS formalism hasbeen adapted to accomodate this symmetry breaking. The Skyrme nucleon-nucleon effective forcehas been used with various sets of parameters (SIII, SkM*, SLy5*). The residual pairing interactionhas been approximated by seniority forces whose neutron and proton parameters have beenfitted to reproduce the odd-even mass differences of some actinide nuclei. The low-lying rotationalband-head energies evaluated within the Bohr-Mottelson unified model have been determined forfour well-deformed odd-nuclei (235U, 239Pu, 237Np, 241Am) yielding a good qualitative agreementto the data for odd-neutron nuclei. The agreement was significantly less good for the odd-protonnuclei, possibly due to the use of the Slater approximation for the exchange Coulomb interaction.The deformation energies of two odd-neutron nuclei (235U and 239Pu) have been calculated forsome single-particle configurations up to a point beyond the outer fission-barrier. Axial symmetrynuclear shape has been assumed while a breaking of the left-right (or intrinsic parity) symmetryhas been allowed around the outer fission-barrier. The fission-barrier heights of such odd-neutronnuclei depend significantly on the particle configurations. A special attention has been paid tothe very important rotational correction to deformation energies. In particular, the correction ofthe moment of inertia calculated from the usual Belyaev expression was considered. Overall, aqualitative agreement with available data on fission-barrier heights for the considered odd-neutronnuclei and their even neighbours has been obtained
Dauby, Gilles. "Structure spatiale de la diversité intra- et interspécifique en Afrique centrale: le cas des forêts gabonaises." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209761.
Повний текст джерелаL’hypothèse la plus souvent avancée pour expliquer l’origine des centres de diversité et d’endémisme est historique :ces centres constitueraient d’anciens refuges forestiers formés pendant les périodes sèches du Quaternaire. Cependant, la forte hétérogénéité environnementale de ces régions pourrait tout aussi bien expliquer la SSDS.
L'objectif principal de cette thèse est de tester l'importance de ces facteurs (historiques et/ou hétérogénéité environnementale) :si les facteurs historiques sont déterminants, on s’attend à observer une concordance spatiale entre la SSDS et la structure spatiale de la diversité génétique (SSDG). En effet, la variation neutre au sein des espèces est en grande partie soumise aux processus qui affectent également la SSDS (dérive génétique/écologique et dispersion des espèces/flux de gènes). L’approche utilisée dans cette thèse consiste donc à comparer et évaluer la concordance spatiale entre la SSDS et la SSDG.
Le modèle biologique et le cadre géographique de cette étude sont les communautés et les populations d’arbres des forêts humides d’Afrique centrale atlantique, avec une attention particulière pour les forêts gabonaises. La SSDS a été étudiée sur la base de relevés de communautés d’arbres (16308 individus) et la SSDG sur la base de séquences d’ADN chloroplastiques de six espèces d’arbres (Greenwayodendron suaveolens, Scorodophloeus zenkeri, Afrostyrax lepidophyllus, Afrostyrax kamerunensis, Santiria trimera et Erythrophleum suaveolens).
Quatre objectifs spécifiques ont été retenus :
(i)\
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Schwoertzig, Eugénie. "Contribution des corridors fluviaux à la dynamique de la biodiversité végétale urbaine." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAH005/document.
Повний текст джерелаUrban ecology, which has emerged over the last thirty years, focused in particular on studying thebiodiversity and on functioning of ecosystems in cities. This work explores urban riparian corridors and their rolein the dynamic of plant communities based on a gradient of urbanization. Indeed, riparian corridors provide astructural connection between the city and the countryside, and their conservation involves preciselyunderstanding their ecological functionality. The objectives of this work are to highlight the effect of the urbanization gradient on the composition and structure of plant communities along a river to determine whether the existence of urban riparian corridors effectivelycontributes to the colonization of adjacent areas. Two rivers, the Bruche and the Rhin Tortu - Ziegelwasser, arestudied in their most urban downstream part in the metropolitan area of Strasbourg, eastern France. [...]
Khamzin, Yersin. "Technologie vstřikování zkušebních těles z termoplastů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444217.
Повний текст джерелаBazin, Cyrille. "L'interface photosphère solaire/chromosphère et couronne : apport des éclipses et des images EUV." Phd thesis, Aix-Marseille Université, 2013. http://tel.archives-ouvertes.fr/tel-00921889.
Повний текст джерелаBodin, Jeanne. "Observed changes in mountain vegetation of the Alps during the XXth century - Role of climate and land-use changes." Phd thesis, Université Henri Poincaré - Nancy I, 2010. http://tel.archives-ouvertes.fr/tel-00592144.
Повний текст джерелаSenterre, Bruno. "Recherches méthodologiques pour la typologie de la végétation et la phytogéographie des forêts denses d'Afrique tropicale." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210954.
Повний текст джерелаII. Field data consisted in phytosociological homogeneous sample plots localized within different recognized phytogeographical entities, in a region of tropical Africa where these entities are known to be well conserved. A total of 37 such plots were inventoried in the region extending from the littoral forests of Ndoté, Equatorial Guinea, which are wet evergreen forests, to the continental forests of the Dja, Cameroon, known as evergreen seasonal forests. The studied region also included the oriental Atlantic forests of Equatorial Guinea, known as moist evergreen forests or caesalp forests. In various parts of this continentality gradient, some plots were localized within climax non-zonal formations, namely the submontane rain forests. The emphasis was put on the vegetation of the Monte Alén National Park.
The sampling methodology was willing to be as "complete ", including all strata, "quantitative ", enumerating all individuals, and "representative ", within each stratum, as possible. These multi-layers plots were realised using nested sub-plots, with a sampling size of 100 individuals for every ligneous stratum recognized (dominant trees, dominated trees and shrubs) and a sampling size of 200m² for the herbaceous and suffrutex stratum.
Forest types were defined independently for each stratum and the differences were analysed. A method was proposed for the simultaneous analysis of all floristic data, converting and standardizing the values from ligneous strata, on the one hand, and from understorey strata, on the other hand.
III. Ten forest types were described using IndVal and discussed in the general context of the guineo-congolian region, from a syntaxonomic view point (agglomerative classification) and from a phytogeographical view point (divisive classification). Homologies between these two approaches are described. The proposed phytogeographical system is based on an "open " conception of hierarchical classifications, combining advantages of agglomerative and divisive classifications. In concrete terms, the non-zonal criteria, for example the submontane variants, are categorised separately and in analogy with the zonal criteria, related to the usual phytochoria.
Analysis of ecological relationships for the 10 communities showed that the main variables related to the floristic variability in our mainland rain forests are elevation, rainfall, hygrometry (estimated using bryophytes cover levels) and distance to the ocean. The two extremes on the vertical microclimatic gradient, dominant trees stratum and herbaceous stratum, give similar typologies, however canonical analysis showed that for the herbaceous layer, non-zonal variables (hygrometry and elevation) were gaining more importance when the influence of the two zonal variables was attenuated. In every case, spatial autocorrelation was less important than the environment in explaining floristic variability but its role increased in the spatial arrangement of understorey species, whose dispersal capacity is generally lower than canopy trees. The phytosociological, phytogeographical and ecological description of forest types is accompanied by a physiognomical description using biological types spectrum, as well as architectural models, leaf sizes, etc.
With regard to diversity, we have demonstrated that species richness was higher from upper to lower strata because of the accumulation in lower strata of species from various strata. On the other hand, the proper stratum diversity, i.e. the structural set, decreased from dominant trees to shrubs. The proper diversity of the herb layer showed relatively high figures mainly due to the higher individual density in relation to the existence of microstrata. Within the 37 sample plots, 1,050 taxa have been identified to species or morpho-species levels, for a total of 25,750 individuals. These taxa represent 442 genus among 104 families. The richest forest type is found on the foothills of the Niefang range, on the windward side. This forest type is also characterised by a high number of oligotypic genus and by species belonging to functional types indicators of glacial refuges. These functional types are defined on the basis of the dispersal capacity and on kind of stand needed for effective germination. We formulated the hypothesis that this kind of "foothills refuge ", characterised by his zonal nature, could have been one of the rare refuges for species from mainland rain forests, while montane and fluvial refuges would mainly have preserved species from non-zonal forest types: (sub)montane and riverine.
Based on indicator species of submontane forests, a potential distribution map of this forest type has been realised at the Atlantic central African scale. More than 400 submontane forest localities have been mapped. These forests begin at 400m of altitude near the ocean, and progressively at higher altitude for increasing distance to the ocean. Many lowland localities also comprised submontane species, which could indicate the existence of ecological transgressions. These transgressions would allow migratory tracks for submontane species between isolated mountain ranges, not only during glacial periods, through heights at the northern and southern borders of the congo basin, but also contemporarily through the lowland riverine forest network, in the centre of this basin. Finally, a special attention has been attributed to littoral forests and to some cases of choroecological transgressions, coupled to the ecological equalization phenomenon.
Doctorat en sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished
Sandler, Hilary A. "Factors influencing colonization and establishment of plant species on cranberry bogs." 2004. https://scholarworks.umass.edu/dissertations/AAI3118331.
Повний текст джерелаJiang, Jhih-hua, and 江志華. "The effect of accelerated carbonation on the calcium species transformation of BOF slag." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/4ng5hv.
Повний текст джерела國立臺北科技大學
資源工程研究所
98
In this study, the effects of accelerated carbonation on the chemical properties, mineral morphologies and microstructures of BOF slag under various accelerated carbonation parameters are evaluated. Under optimum accelerated carbonation parameters, the results indicate that particle size 3.5 to 7mm, 7 to 15mm and 15 to 25mm of BOF slags individually lowered their pH values from 12.3, 12.0 and 11.9 to 10.8, 10.5 and 10.4. Besides, thermal weight loss of BOF slags for particle size 3.5 to 7mm, 7 to 15mm and 15 to 25mm individually increased from 1.28 %, 1.09 % and 0.79 % to 1.72%, 1.38% and 1.57%. The mineral morpgology micrographs and SEM micrographs of accelerated carbonation BOF slags show that the surface of BOF slag was feasible to form calcium carbonate. The XRD patterns of accelerated carbonation BOF slags show that there were calcite on the surface of BOF slag and the spectra of FTIR of accelerated carbonation BOF slags indicate that there were CO32- function groups presenting on surface of carbonated accelerated carbonation BOF slags. Based on the investigation of chemical properties, mineral morphologies and microstructures of accelerated carbonation BOF slags on different reaction time, the results show that the grain size and thickness of calcium carbonate and the diffraction peak intensity of calcite on accelerated carbonation BOF slag surface increase with the reaction time. The calcium carbonate of BOF slag surface was formed by the reaction of Ca(OH)2 and CHS gels produced from the hydration of the f-CaO and Ca2SiO4 with carbon dioxide through aqueous carbonation. Furthermore, the results in accordance with TCLP and Tank Leaching tests indicate that the leaching concentration of Cu, Cr, Pb,Ni and Zn in accelerated carbonation BOF slag was obviously decreased. Based on the above results, accelerated carbonation of BOF slag not only reduces high alkalinity of BOF slag and leachability of heavy metals in BOF slag, but also promotes the utilization of BOF slag and reaches the reduction of carbon dioxide.
Lee, Min-Ling, and 李敏菱. "A Study on Treatment of Wastewater Containing Copper Species by Using Powdered BOF Slag." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/es2m2z.
Повний текст джерела國立臺北科技大學
資源工程研究所
99
The purpose of this study was to investigate the effectiveness of using powdered BOF slag to remove the copper-ion contaminants in wastewater. The BOF power, obtained from the burnt ashes, was purified and analyzed to have particle sizes of >900 μm, 150-900 μm, <150 μm and different L/S ratio for treating time period of 5, 10, 30 and 60 min. The set of experiments were designed to demonstrate the purpose of waste water treatment by utilizing the inexpensive BOF slag powder. Powdered BOF slag is heterogeneous oxide materials and analyzed to have the compositions of Fe2O3 46.0-51.6% and CaO 35.3-45.0%. The BOF powder with different particle sizes on L/S ratio 1000 and 30 min were tested for removal of Cu(Ⅱ) and Cu-EDTA solution. The results indicated that the smaller size of the powdered BOF slag the better for the copper ion removal. When the <150 μm size slag was used under the conditions of 30 min and L/S ratio 1000, nearly 100% of the total Cu(Ⅱ) in water solution was removed. The tests of different L/S ratio (200, 500, 1000 and 2000) at the treatment time of 5, 10, 30 and 60 min showed that the increase in L/S ratio and time period were generally the better results. For other tests of that <150 μm powdered BOF slag in L/S ratio 2000, it was determined to be 100% and 90% of Cu(Ⅱ) and Cu-EDTA solution, respectively. There results will be useful for future scale-up runs for further studies on the powdered BOF slag removal of the waste water containing copper ions. The experiments also showed that the powdered BOF slag had the main constituent CaO and other alkaline metals. Further investigation regarding of the released calcium and copper removal for powdered BOF slag was performed. It was found that the calcium component is responsible for the removal of copper ions. In the Cu-EDTA solution, the TOC concentration decreases if the treatment time increases. Both of Freundlich and Langmuir Isotherm Equations were followed and found that the data could be successfully described by the Freundlich Isotherm Equations. The recovered BOF slag powder from the treatment with copper ions was examined by using X-ray Diffraction (XRD) and Scanning Electronic Microscopy (SEM). The XRD pattern remained the same but the surface smoothness had increased in the case of Cu-EDTA solution treatment. By comparison, the Cu(Ⅱ) solution did not affect the powder particle surface. Furthermore, the solution after treatment was analyzed for the metal concentration to detect the possibility of metal leaching from the BOF slag powder. According to the TCLP test, the leaching concentration of Pb (Ⅱ), Cr(Ⅱ), Cr(Ⅱ), Cu(Ⅱ), Ba(Ⅱ), As(Ⅱ), Se(Ⅱ) and Hg(Ⅱ) was minimum. Overall, the evaluation of using the BOF slag power has proven to be useful and low-cost material for removing Cu(Ⅱ) ions from waste water.
Catarina, Almeida Ana. "DNA damage in two bivalve species: Mytilus galloprovincialis and Ruditapes decussatus from the South coast of Portugal." Master's thesis, 2009. http://hdl.handle.net/10400.1/447.
Повний текст джерелаIn the last years, several studies have been carried out to assess the environmental “health” of the South Coast of Portugal. The aim of the present thesis was to evaluate DNA damage as a biomarker of genotoxic contamination in two bivalve species from the south coast of Portugal, mussels Mytilus galloprovincialis and clams Ruditapes decussatus. Mussels were sampled at nine sites along the coast, and clams were collected at four shellfish beds in the Ria Formosa Lagoon. The alkaline version of the Comet assay was used to estimate the DNA damage present in the haemolymph of bivalves. An image analysis system (Komet 5.5, Kinetic Imaging Ltd) was applied and 3 parameters were calculated, Tail DNA (%), Olive Tail Moment (OTM; arbitrary units) and Tail length (μm). Data obtained for both species were low, in the same order of magnitude for sites considered as reference. These values can be used as baseline/reference levels of the genotoxic contamination for future studies made in the South coast of Portugal. The nature and magnitude of contaminants in this coast were not particularly genotoxic. DNA damage present in mussel and clams haemolymph revealed to be a sensitive biomarker of genotoxic contamination. DNA damage in both specimens responded to the existing differences between sites and seasons, with highest values during summer. This damage biomarker was also sensitive to gender differences concerning both species and the overall data indicates that females have higher DNA damage than males. Moreover, this study demonstrated that information about the condition index (and Abstract - iii - reproductive cycle) and the local abiotic conditions are essential for the appropriate explanation of data. When comparing the DNA damage between the two analysed species, collected from close sites, DNA damage was relatively similar for both bivalve species. However, while mussels had highest DNA damage in August, clams showed maximum values in February/March, suggesting some interspecific differences possibly associated with dissimilar trophic strategies and/or habitats. Lipid peroxidation (LPO) was also analysed, to verify if the environmental conditions (contaminants and abiotic factors) can induce injuries in both cellular membranes and DNA. For mussels, the compounds/factors affecting LPO can also promote (low) genotoxicity. For clams, this relationship was only verified during July. Concluding, the present thesis demonstrates that the DNA damage present in M. galloprovincialis and R. decussatus is a sensitive biomarker to discriminate spatial, temporal and genders differences, revealing to be an appropriate tool for the evaluation of genotoxic contamination along the South coast of Portugal.