Tesis sobre el tema "Soil samples"
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Arroyo, Marcos. "Pulse tests in soil samples". Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/25e7e542-94f3-49f3-ba6f-36df35f5e0e2.
Texto completoGustavsson, Björn. "Heterogeneities in samples of contaminated soil /". Luleå : Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1544/2007/52/.
Texto completoGustavsson, Björn. "Heterogeneities in samples of contaminated soil". Doctoral thesis, Luleå tekniska universitet, Geovetenskap och miljöteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25775.
Texto completoGodkänd; 2007; 20071113 (ysko)
Payne, Rosara Faith. "Investigation of radiological contamination of soil samples from Idaho National Laboratory". Diss., Online access for everyone, 2006. http://www.dissertations.wsu.edu/Dissertations/Summer2006/r%5Fpayne%5F053106.pdf.
Texto completoBarker, Anthony David Purslove. "The damage potential of the root-lesion nematode Pratylenchus bolivianus in the UK". Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312235.
Texto completoWang, Yuanyuan. "Analysis of soil samples from polluted mining areas". Thesis, University of Reading, 2016. http://centaur.reading.ac.uk/68856/.
Texto completoAl, Razzaz Salim. "Soil Analysis for samples from the hill-fort of Hedeby". Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-118399.
Texto completoPhillips, Tom. "Detection of Phytophthora cinnamomi from bulk water and soil samples". Thesis, Phillips, Tom (2008) Detection of Phytophthora cinnamomi from bulk water and soil samples. Honours thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/32595/.
Texto completoChatreewongsin, Urai. "Metal Extraction From Soil Samples By Chelation in a Microwave System". Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/26982.
Texto completoPh. D.
Tristan-Montero, Emma Esther. "Human health risk assessment for contaminated land in historical mining areas". Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/7343.
Texto completoJohansson, Pontus. "Returning to Vuollerim : Geoarchaeological study of Soil Samples from a Stone Age Settlement". Thesis, Umeå universitet, Miljöarkeologiska laboratoriet, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-108824.
Texto completoHovland, Kristin. "Multilocus Sequence Typing of close Neighbours to Bacillus anthracis isolated from Soil Samples". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24589.
Texto completoSilva, Francisca Gleiciane da. "Hydraulic conductivity of saturated soil and preferred flow in samples of land confined". Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17152.
Texto completoUnderstanding the processes related to the movement of water in soil profile is relevant to the management of soil and water resources. Hydraulic conductivity is an important soil property that affects this movement, but its determination in laboratory conditions requires that samples are contained in cylinders which can cause the presence of preferential flow through the soil wall interface. So, the goal of this work was to test the effect of increasing perimeter and height of the sample on saturated hydraulic conductivity in confined soil samples of different textures. Soil samples were collected and the following physical analyzes were performed: particle density, particle-size, water dispersed clay, soil porosity, and saturated hydraulic conductivity (Ko). Experimental data were analyzed in a randomized design for all variables, adopting a 4 x 5 factorial arrangement (four diameters x five heights of the cylinders), with six replications. The Shapiro- Wilk test was used to verify the normality of the data, F test for analysis of variance, and TukeyÂs test for comparison of means (p<0.05). Classical descriptive statistics and multivariate analysis techniques were also employed. It was conclude that: a) the results support the hypothesis that the increase of the perimeter causes an increase of the saturated hydraulic conductivity; b) for the same increase of preferential flow area, the effect on the saturated hydraulic conductivity was higher for clay soil; c) the hypothesis that increased water path causes a change in the Ko values was rejected; d) for both soil classes increased water path did not affect the values of the saturated hydraulicconductivity.
A compreensÃo dos processos relacionados ao movimento da Ãgua no perfil do solo à relevante para o manejo do solo e dos recursos hÃdricos. A condutividade hidrÃulica à um importante atributo do solo que interfere nesse movimento, sendo que sua determinaÃÃo na condiÃÃo de laboratÃrio requer que as amostras estejam confinadas em cilindros, o que pode causar a presenÃa de fluxo preferencial pela interface solo/parede do cilindro. Objetivou-se nesse trabalho testar o efeito do aumento do perÃmetro e da altura da amostra sobre a condutividade hidrÃulica do solo saturado em amostras confinadas de terra de diferentes texturas. Foram coletadas amostras de terra para realizaÃÃo das anÃlises fÃsicas, a saber: densidade de partÃculas, granulometria, argila dispersa em Ãgua, porosidade do solo e condutividade hidrÃulica do solo saturado (Ko). Os dados experimentais foram analisados em delineamento inteiramente casualizado para todas as variÃveis, adotandose o esquema fatorial 4 x 5 (quatro diÃmetros e cinco alturas dos cilindros), com seis repetiÃÃes. Foram aplicados os testes de Shapiro-Wilk para verificar a normalidade dos dados, o F para anÃlise de variÃncia e o de Tukey para a comparaÃÃo da mÃdias (todos a 5% de probabilidade). TambÃm foi empregada a estatÃstica descritiva clÃssica para algumas variÃveis e tÃcnicas multivariadas de anÃlises. Conclui-se que a) aceita-se a hipÃtese de que o aumento do perÃmetro da amostra provoca aumento nos valores de condutividade hidrÃulica do solo saturado; b) para o mesmo aumento de Ãrea de fluxo preferencial, o efeito sobre a condutividade hidrÃulica do solo saturado para o solo argiloso foi maior; c) a hipÃtese de que o aumento do percurso da Ãgua causa alteraÃÃo nos valores de Ko foi refutada; d) para ambas as classes de solos o aumento do percurso da Ãgua nÃo foi determinante nos valores obtidos para condutividade hidrÃulica do solo saturado.
Teets, Paul D. "Analysis of macro-, micro-, and trace elements of soil samples from Sanborn field /". free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418071.
Texto completoHe, Jizheng y n/a. "Molecular Biological Studies of Soil Microbial Communities Under Different Management Practices in Forest Ecosystems of Queensland". Griffith University. Australian School of Environmental Studies, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060309.095702.
Texto completoHe, Jizheng. "Molecular Biological Studies of Soil Microbial Communities Under Different Management Practices in Forest Ecosystems of Queensland". Thesis, Griffith University, 2005. http://hdl.handle.net/10072/367075.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
Full Text
Joosse, Pamela Jane Shantz. "Assessing physical soil quality using mechanical indices from applying internal and external stresses to remoulded and structurally intact soil samples". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ35800.pdf.
Texto completoDo, Lan. "New tools for sample preparation and instrumental analysis of dioxins in environmental samples". Doctoral thesis, Umeå universitet, Kemiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-70218.
Texto completoLangaas, Gjertrud Louise. "Measurements of radioactivity in plant and soil samples taken near a nuclear power plant". Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-296371.
Texto completoLangston, Joy. "An examination of selected trace elements in modern and ancient samples of Triticum spelta". Thesis, Durham University, 1994. http://etheses.dur.ac.uk/5509/.
Texto completoDoan, Thuoc Van y Binh Thi Nguyen. "Polyhydroxyalkanoates production by a bacterium isolated from mangrove soil samples collected from Quang Ninh province". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-99511.
Texto completoChủng vi khuẩn có khả năng sinh tổng hợp PHA đã được phân lập từ đất rừng ngập mặn tỉnh Quảng Ninh nhờ kỹ thuật nhuộm với Nile red. Ảnh quan sát dưới kính hiển vi điện tử dẫn truyền chứng tỏ rằng chủng vi khuẩn này có khả năng tích lũy lượng lớn PHA trong tế bào. Chủng vi khuẩn tuyển chọn có khả năng sinh tổng hợp PHA từ nhiều nguồn các bon khác nhau như glucose, xylose, fructose, glucerol, glucose và propionate nhưng không có khả năng tổng hợp PHA từ maltose hoặc saccharose. Chủng vi khuẩn tuyển chọn tổng hợp poly (3-hydroxybutyrate) từ các nguồn các-bon như glucose, xylose, fructose, hay glycerol, trong khi đó poly (3-hydroxybutyrateco- 3-hydroxyvalarate) sẽ được tổng hợp khi phối hợp sử dụng hai nguồn các-bon (glucose và propionate). Fructose là nguồn các-bon tốt nhất cho chủng QN271 sinh tổng hợp PHA, khi nuôi cấy trong môi trường có fructose chủng vi khuẩn này có thể tạo ra lượng sinh khối là 6 g/L trong đó có chứa 63.3% PHA sau 32 giờ
Robinson, Lorraine. "The relationship between the sensible properties of mineral soil samples and those properties determined in the laboratory". Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293789.
Texto completoParaskova, Julia V. "Organic phosphorus speciation in environmental samples : Method development and applications". Doctoral thesis, Uppsala universitet, Institutionen för kemi - BMC, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-228734.
Texto completoMoreno, Lilliana I. "The Effect of Sample and Sample Matrix on DNA Processing: Mechanisms for the Detection and Management of Inhibition in Forensic Samples". FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1764.
Texto completoCooper, Joanne. "Electrochemical method for the rapid in situ screening of heavy metals in soil and water samples". Thesis, Cranfield University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443720.
Texto completoIdialu, Ofure Ruth. "Development of analytical techniques for detection and remediation of polychlorinated biphenyls in soil and water samples". Thesis, University of Strathclyde, 2016. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27526.
Texto completoKastlander, Johan. "In situ measurements of radionuclide concentration in soil : An investigation into detector properties and methods". Doctoral thesis, Stockholms universitet, Fysikum, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-47398.
Texto completoAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.
Salloum, Myrna Joyce. "Sorption of organic compounds to soil and geologic samples that vary in mineral content and diagenic properties". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ46913.pdf.
Texto completoBarzagli, Lorenzo. "Inducing and assessing damage in stabilized soil samples towards the study of self-healing: an exploratory work". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Buscar texto completoGiannakoudi, Theodora. "Determination of organic phosphorus in soil samples by capillary zone electrophoresis coupled to electrospray ionization mass spectrometry". Thesis, Uppsala universitet, Analytisk kemi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-416675.
Texto completoPokharel, Janak. "CYCLIC LOAD RESISTANCE AND DYNAMIC PROPERTIES OF SELECTED SOIL FROM SOUTHERN ILLINOIS USING UNDISTURBED AND REMOLDED SAMPLES". OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1545.
Texto completoTraballi, Rogério Carlos [UNESP]. "Composição de amostra representativa de solo fertilizado com lodo de esgoto". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/101912.
Texto completoO objetivo do presente trabalho foi determinar, através dos conhecimentos da estatística, o número mínimo de amostras de solo a ser coletado em uma área fertilizada com lodo de esgoto para que, depois de analisadas, representem, com elevada confiabilidade, a composição química do solo estudado. Para isso foram utilizadas parcelas de 486m² compostas por 9 linhas espaçadas de 3,0m. Em cada linha foram plantadas 9 mudas de espécies nativas da Mata Atlântica, espaçadas de 2,0m entre elas, totalizando 81 plantas. Os tratamentos foram constituídos da aplicação de lodo de esgoto nas seguintes doses: 2,5; 5,0; 10,0; 15,0 e 20,0 t ha-1 e os números de amostras simples testados para compor uma amostra composta foram: 5, 10, 15, 20 e 25, sendo as mesmas coletadas entre 0 e 20 cm de profundidade. O delineamento experimental seguiu a metodologia de blocos ao acaso com quatro repetições, no esquema de parcelas subdivididas, sendo que as parcelas foram constituídas pelas doses de lodo de esgoto e as subparcelas pelo número de amostras. Para as variáveis: matéria orgânica, fósforo e cálcio, o número de amostras simples para formar uma amostra composta não foi influenciado pela dose de lodo de esgoto. Para a determinação das variáveis pH, H + Al+3 e M.O., foi observado que após aplicação de 20 t ha-1 há necessidade de se coletar, no mínimo, 5 amostras simples para formar uma amostra composta confiável, enquanto que para se determinar os teores de K, Ca e Mg com alta confiabilidade foram necessários números iguais ou superiores a 20 amostras simples para formar uma composta
The goal of this paper was to apply statistical techniques in determining the minimum number of soil samples to be collected in a fertilized area with sewage sludge which, after analyses, represent, with high confidence, the chemical composition of the analyzed soil. To this end parcels of 486 m2 were used, consisting of 9 lines set out in a 3 meter interval and in each line 9 Mata Atlântica plants, alternating with a mix of pioneering, secondary and climax plants were planted at a 2 meter interval, totaling 81 plants. These plants were fertilized with sewage sludge in the following doses: 2,5; 5,0; 10,0; 15,0 and 20,0 t ha-1. For every dose of sewage sludge, 5, 10, 15, 20, and 25 simple soil samples were collected, thus composing the samples that were sent out for laboratory analysis. The experimental design followed the random block method with four repetitions, in an outline of subdivided parcels, where the parcels were made of doses of sewage sludge and the sub parcels of number of samples collected. The measured values of Ca, Mg, P and K obtained from the analyzed soil were varying, confirming to the doses of sewage sludge applied, but the number of samples were not influenced by agricultural practice, leaving the spatial variability for each type of variable. Based upon obtained results it can be concluded that, in order to determine pH, H+ + Al+3 and M.O. of the variables, after applying 20 t ha-1, it is necessary to collect, at least, 5 simple samples as a base for a reliable composed sample. To determine the values of K, Ca and Mg, with high confidence, 20 or more simple samples were needed to make such a composed sample.
Santawamaitre, Todsadol. "An evaluation of the level of naturally occuring radioactive materials in soil samples along the Chao Phraya river basin". Thesis, University of Surrey, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555934.
Texto completoBorsato, Natíza Graziele Martins [UNESP]. "Identificação e quantificação de bismuto total em amostras de solo em regiões de falhas geológicas por análise eletroquímica". Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151841.
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No presente trabalho estudou-se, a concentração de bismuto total em áreas com falhas tectônicas e sua correlação com os níveis de radioisótopos de chumbo e de emissão de radônio-222. As determinações de bismuto total em diferentes solos foram realizadas por análise eletroquímica pela técnica de voltametria de redissolução anódica. Os valores de bismuto total aumentaram de acordo com o aumento da profundidade na extração do solo em estudo. Evidenciando a existência de bismuto decorrente da emanação de radônio-222 e sugerindo a existência de falhas geológicas nas áreas estudadas. Por análise estatística (ANOVA) verificou-se uma correlação da concentração de chumbo total e o nível de emissão de radônio-222 com a concentração de bismuto total. Essa correlação indica que a fonte de bismuto é proveniente da cadeia de decaimento radioativo do urânio-238 e tório-232.
In this work, the total concentration of bismuth areas with tectonic faults and their correlation and their correlation with the levels of lead radioisotopes and radon-222 emission. The determination of total bismuth in different soils were performed by electrochemical analysis using anodic redissolution voltammetry technique. The total bismuth values increased according to the depth increase in the extraction of the soil under study, evidencing the existence of bismuth due to the emanation of radon-222 and suggesting the existence of geological faults in the studied areas. Statistical analysis (ANOVA) showed a correlation between the total lead concentration and the emission level of radon-222 with the total bismuth concentration. This correlation indicates that the bismuth source is from the radioactive decay chain of uranium-238 and thorium-232.
Thorsen, Marte Høye. "Mutagenicity and induction of CYP1A- enzymes from organic extracts of soil samples from nursery schools, evaluated by in vitro studies". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12763.
Texto completoElhelou, Othman. "Magnetic Susceptibility Mapping of Fly Ash in Soil Samples Near a Coal-Burning Power Plant in Pointe Coupee Parish, Louisiana". Thesis, University of Louisiana at Lafayette, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1592981.
Texto completoMagnetic susceptibility is a property that can be used to effectively determine the compositional changes of mineral materials in soil. The objective of this study is to detect the presence of magnetic particles related to the migration of fly ash from a nearby coal-burning power plant over parts of Pointe Coupee Parish, LA. This is based on the idea that the fly ash that is released into the atmosphere during the coal burning process contains heavy metals and magnetic particles in the form of ferrospheres, which can be used to trace back to the source. Maps of the top and sub soil were generated to differentiate the magnetic susceptibility values of the heavy metals potentially attributed to the migration and settling of fly ash onto the surface from any pre-existing or naturally occurring heavy metals in the sub soil. A 60 km2 area in Pointe Coupee Parish was investigated in approximately 0.5 km2 subsets.
At each site, a minimum of 20 magnetic susceptibility measurements were obtained using a field probe along with discrete surface and subsurface samples collected for subsequent laboratory analysis. Samples of fly ash obtained directly from the source were also analyzed to verify the field and laboratory analysis. Contour maps representing the spatial distribution of the fly ash along with histograms of magnetic susceptibility values, reflective light microscope, and chemical analysis indicate a correlation between the proximity to the power plant and the predominant wind direction. Acquisition curves of the isothermal remanent magnetization demonstrate the presence of predominantly low coercivity minerals (magnetite) with a small amount of a high-coercivity phase. The microstructure of the magnetic fractions of the fly ash along with select top and sub soil samples were observed using a reflective light microscope for identifying and confirming the presence of ferrospheres associated with fly ash.
Hobbs, Jeremy. "Traces of the Past : XRF analysis of soils samples from a medieval churchyard in Sigtuna, Sweden". Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-182689.
Texto completoMonaghan, Áine Marie. "Investigations on the serotypes and virulence profiles of non-O157 Shiga-toxin producing Escherichia coli (STEC) and Enteropathogenic Escherichia coli (EPEC) isolated from bovine farms and abattoirs". Thesis, Ulster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695311.
Texto completoTraballi, Rogério Carlos 1966. "Composição de amostra representativa de solo fertilizado com lodo de esgoto /". Botucatu : [s.n.], 2008. http://hdl.handle.net/11449/101912.
Texto completoAbstract: The goal of this paper was to apply statistical techniques in determining the minimum number of soil samples to be collected in a fertilized area with sewage sludge which, after analyses, represent, with high confidence, the chemical composition of the analyzed soil. To this end parcels of 486 m2 were used, consisting of 9 lines set out in a 3 meter interval and in each line 9 Mata Atlântica plants, alternating with a mix of pioneering, secondary and climax plants were planted at a 2 meter interval, totaling 81 plants. These plants were fertilized with sewage sludge in the following doses: 2,5; 5,0; 10,0; 15,0 and 20,0 t ha-1. For every dose of sewage sludge, 5, 10, 15, 20, and 25 simple soil samples were collected, thus composing the samples that were sent out for laboratory analysis. The experimental design followed the random block method with four repetitions, in an outline of subdivided parcels, where the parcels were made of doses of sewage sludge and the sub parcels of number of samples collected. The measured values of Ca, Mg, P and K obtained from the analyzed soil were varying, confirming to the doses of sewage sludge applied, but the number of samples were not influenced by agricultural practice, leaving the spatial variability for each type of variable. Based upon obtained results it can be concluded that, in order to determine pH, H+ + Al+3 and M.O. of the variables, after applying 20 t ha-1, it is necessary to collect, at least, 5 simple samples as a base for a reliable composed sample. To determine the values of K, Ca and Mg, with high confidence, 20 or more simple samples were needed to make such a composed sample.
Orientador: Iraê Amaral Guerrini
Coorientador: Juliano Corulli Corrêa
Banca: Roberto Lyra Villas Bôas
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Naumann, Thomas E. "K-Ar Age Values of Bulk Soil Samples and Clay Fractions: Effects of Acid Extraction and Implications for the Origin of Micaceous Clay in Savannah River Site Soils, South Carolina, USA". Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/geosciences_theses/27.
Texto completoPietilä, H. (Heidi). "Development of analytical methods for ultra-trace determination of total mercury and methyl mercury in natural water and peat soil samples for environmental monitoring". Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206202.
Texto completoTiivistelmä Elohopeaa pääsee ilmakehään sekä luonnollisista lähteistä (mm. tulivuorenpurkaukset ja kiviaineksen rapautuminen), että ihmisen toiminnan kautta. Elohopean viipymäaika ilmakehässä on hyvin pitkä, minkä vuoksi se voi kulkeutua kauas päästölähteestä ennen päätymistään maaperään ja vesistöihin. Ympäristössä olevasta epäorgaanisesta elohopeasta voi muodostua erittäin myrkyllistä metyylielohopeaa, joka rikastuu helposti ravintoketjussa. Metyylielohopean muodostuminen on merkittävä osa elohopean biogeokemiallista kiertoa, minkä vuoksi metyylielohopean määrittäminen näytteen kokonaiselohopeapitoisuuden ohella antaa tärkeää tietoa elohopean käyttäytymisestä ympäristössä. Tutkimuksessa kehitettiin analyysimenetelmät, joilla määritettiin ultrapieniä kokonaiselohopea- ja metyylielohopeapitoisuuksia humuspitoisista luonnonvesistä ja turvemaanäytteistä. Tutkimuksessa käytetyt näytteet oli kerätty turvemaametsien valuma-alueilta Sotkamosta. Luonnonvesinäytteiden kokonaiselohopeapitoisuuksien määrityksessä käytettiin kylmähöyrymenetelmää (CV) yhdistettynä induktiiviplasma-massaspektrometriaan (ICP-MS). Vesi- ja turvenäytteiden metyylielohopeapitoisuuksien määrityksessä elohopeaspesiekset erotettiin kaasukromatografisesti (GC) ja määritettiin isotooppilaimennus-ICP-MS:lla. Ennen GC-ICP-MS -määritystä näytteet esikäsiteltiin typpiavusteisella tislausmenetelmällä ja esikonsentroitiin ’purge and trap’ -tekniikalla. CV-ICP-MS ja ’purge and trap’ GC-ICP-MS -menetelmät optimoitiin huolellisesti sekä laiteparametrien, että reagenssimäärien suhteen. Menetelmillä saatavien tulosten oikeellisuus varmistettiin vertailumateriaalien ja/tai vertailumenetelmien avulla. Kehitettyjä analyysimenetelmiä hyödynnettiin tutkimuksessa, jossa seurattiin metsähakkuiden mahdollisia vaikutuksia elohopean huuhtoutumiseen ja metyloitumiseen ojitetuilla turvemailla
Luo, Qian. "GC/ion trap MS method development and applications for the analysis of polybrominated diphenyl ethers in environmental and biota samples". HKBU Institutional Repository, 2008. http://repository.hkbu.edu.hk/etd_ra/864.
Texto completoYurdakul, Yorulmaz Sema. "Investigation Of Emissions And Combustion Kinetics Of Waste Wood Samples With Thermal And Spectral Methods". Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607570/index.pdf.
Texto completoDe, Wit Hermina Johanna. "Comparative analysis of existing pipelines for assessment of arbuscular mycorrhizal fungal biodiversity in natural and commercial rooibos (aspalathus linearis) and honeybush (cyclopia intermedia) soil samples". Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/2915.
Texto completoGoran, Kitić. "Mikrotalasni senzori vlažnosti zemljišta zasnovani na komponentama sa distribuiranim parametrima". Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2016. https://www.cris.uns.ac.rs/record.jsf?recordId=101479&source=NDLTD&language=en.
Texto completoSoil moisture sensors are of great importance for the irrigation systems thatare able to increase the yiel on avarage of 79%. Within this thesis two sensorsolutions have been developed. The first sensor, which is intended forlaboratory use, has been designed by upgrading existing samplingequipment. The constructed calibration curve for this type of sensor that canbe used for soil mositure determination with relative error not larger than2.5% with respect to full scale output. The second sensor solution isdesigned to be used in the field. It is fabricated in LTCC technology and it ischaraterized by small overall dimensions. The main advantage of this sensoris that it is immune to the soil electrical conductivity which is closely related tothe soil type. Proposed sensor is tested on two soil sample of differentchemical composition and the results have shown that the type of soil doesnot influence the sensor response. The relative error with the respect of fullscale output was only 5.36 %.
Schietecatte, Liesbet. "Of fish, pigs and cesspits : a comparative study of stable carbon and nitrogen isotope analyses on animal bone and soil samples from five medieval sites in Belguim". Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/8585.
Texto completoIn medieval archaeology, diet is often inferred from excavated faunal remains. Recently, researchers have started to apply stable isotope techniques to diet reconstruction. Most studies have focused on the analysis of human bone collagen. In this research, human skeletal remains were not available, so ¹³C/¹²C and ¹⁵N/¹⁴N analyses were made on animal bones and soil samples from a medieval fisherman's village, Walraversijde. In addition, samples were analysed from four other late medieval sites: Ostend, Bruges, Aalst and Namur. Bone collagen samples fiorn Walraversijde showed an ocean-derived saline influence on the isotopic values of especially sheep/goats. Dogs, often used in prehistoric research as dietary proxies for humans, are unsuitable at this site because of huge variability in δ¹⁵N values. Pigs showed the most positive δ¹³C and δ¹⁵N values of all the terrestrial animal species. It seems likely that the residues after fish processing were collected and fed to them in pens, thus indicating that a waste management system existed. Analysis of sequential samples of pig teeth showed that piglets were probably bought at inland markets and brought to the village for fattening. These resuits call for an extended survey of animal isotopic values. δ¹³C and δ¹⁵N analysis was also carried out on soil samples, including a number taken from excavated cesspits. This is the first time that a study of this kind has been undertaken. The results are very promising as there seems to be less routing of dietary components than in human bone collagen. The cesspits at Narnur, the site furthest from the coast, yielded the lowest δ¹⁵N values, indicating a low trophic level diet with little influence from fish. The highest trophic level diet was recorded in the cesspit at Aalst. At Walraversijde, the low representation of marine foods was very surprising, apparently contradicting the abundance of fish remains found at the site. Fish seems to have been more important for its commercial value than as an item of diet. Clearly, more research is needed into the economy of the village and its organization.
Silva, Júnior Flavio Manoel Rodrigues da. "Atividade mutagênica em solos sob a influência de rejeitos de carvão". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/13841.
Texto completoSoil is a highly complex environmental compartment that has suffered contamination by substances from multiple sources mainly due to fast population growth and intense industrial and agricultural activity. Among the main activities that affect soil quality are power generation activities that use fossil fuels, such as mineral coal. Among the several compounds present in coal ashes that are employed in coal-fired power plants are substances that interact with the genetic material, causing mutations and/or damage at the individual level (like neoplasias) but also at higher levels of biological organization (like loss of genetic diversity in populations). There are few studies on the mutagenic potential of soil samples, especially those that investigate the action of mutagens from inorganic sources. Moreover, studies of mutagenesis in soils under the influence of coal-fired power plants have rarely been reported in literature. Thus, this work aimed at: (i) testing a protocol for the evaluation of mutagenic activity in inorganic and organic extracts from soil samples; (ii) evaluating the presence and the profile of mutagenic compounds in soils under the influence of coal ashes and (iii) investigating environmental routes of dispersion of mutagenic compounds in the study area. In order to achieve these aims, extraction processes for inorganic and organic compounds were tested concerning their efficiency to extract compounds potentially mutagenic to the specific Salmonella typhimurium strain that detects frameshift mutagens (TA98). The most efficient protocols were further utilized for the tests with different soil samples under the influence of coal-fired power plant using several strains, in absence and presence of metabolic activation (S9 mix fraction). Mutagenesis results associated with the chemical characterization of the organic compounds and metals indicated that contaminants present in coal ashes can be easily dispersed to adjacent areas. This approach allowed relating the presence of certain classes of compounds to specific damages in DNA and inferring distinct dispersion routes for these compounds. This work highlights the importance of studies concerning complex environmental matrices, specially contaminated soils, which seek the integration of mutagenesis data and their use from an ecological perspective.
Bellin, Iramaia Corrêa [UNESP]. "Interações entre íons Hg(II) e substâncias húmicas extraídas de diferentes solos da Bacia do Médio Rio Negro, Amazônia". Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/105741.
Texto completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Neste trabalho caracterizaram-se amostras de solo e substâncias húmicas (SH) extraídas de diferentes solos da Bacia do Médio Rio Negro e também determinaram-se a capacidade de complexação de íons Hg(II) por SH e constantes de troca entre espécies metálicas originalmente complexadas às SH por íons Hg(II). As amostras de solos foram caracterizadas através do teor de matéria orgânica, análises elementar e granulométrica. Os resultados mostraram que os teores de matéria orgânica para as amostras de solo diminuíram com a profundidade. Com base nos resultados de análise granulométrica feita nas amostras de solos, caracterizou-se o aumento dos teores de argila em função da profundidade com a conseqüente diminuição dos teores de areia e silte. As substâncias húmicas extraídas de amostras de solos coletados na Bacia do Médio Rio Negro-AM foram caracterizados por análise elementar, ressonância paramagnética eletrônica e ressonância magnética nuclear. Os resultados mostraram que, em função da profundidade, os valores das razões atômicas C/N foram praticamente constantes ao contrário das razões C/O e C/H, as quais diminuíram. As concentrações de radicais livres do tipo semi-quinona das substâncias húmicas variaram de 0,08 a 5,38 x 1018 spins g-1 de carbono, indicando diferença entre os níveis de humificação das SH extraídas de solos amazônicos. As SH extraídas de solos de regiões alagáveis apresentaram maiores concentrações de spins em relação às SH extraídas de regiões não alagáveis, indicando influência da umidade no processo de humificação.
In this research were characterized humic substances (HS) and soil samples extracted from Rio Negro-AM Medium Basin and capacity of complexation (CC) of Hg(II) by HS and constants of exchange between metallic species originally complexed in the HS by Hg(II) had also been determined. The soil samples were characterized through organic material composition, elemental and granulometry analysis. The results showed decreasing of the organic material composition with the depth. According to the results taken, was characterized an increasing in the composition of clay with the depth, but in the other hand, a reduction in silt and sand composition. The humic substances extracted of soil samples from Rio Negro-AM Medium Basin were characterized by elemental analysis, electronic paramagnetic resonance and nuclear magnetic resonance. The results had shown that, in function of the depth, the atomic ratio values C/N were constants, while the atomic ratio C/O and C/H decresed. The concentrations of free radicals of the humic substances were 0.08 to 5.38 x 1018 spins g-1 of carbon, indicating difference in the humification levels of HS extracted from Amazonian soils. The HS extracted in flooded regions showed bigger spins concentrations comparing to ones extracted in unflooded regions, showing that the humidity influences in the process of humification. The NMR of 13C dates showed the sequence of percentage of kind of carbon: aliphatic > ethers/hydroxyls > carboxyls/esthers/amides > aromatics > phenols @ carbonyls of aldehydes and ketones for HS samples extracted of the differences profiles of the Amazonian soils studied.
Bellin, Iramaia Corrêa. "Interações entre íons Hg(II) e substâncias húmicas extraídas de diferentes solos da Bacia do Médio Rio Negro, Amazônia /". Araraquara : [s.n.], 2006. http://hdl.handle.net/11449/105741.
Texto completoAbstract: In this research were characterized humic substances (HS) and soil samples extracted from Rio Negro-AM Medium Basin and capacity of complexation (CC) of Hg(II) by HS and constants of exchange between metallic species originally complexed in the HS by Hg(II) had also been determined. The soil samples were characterized through organic material composition, elemental and granulometry analysis. The results showed decreasing of the organic material composition with the depth. According to the results taken, was characterized an increasing in the composition of clay with the depth, but in the other hand, a reduction in silt and sand composition. The humic substances extracted of soil samples from Rio Negro-AM Medium Basin were characterized by elemental analysis, electronic paramagnetic resonance and nuclear magnetic resonance. The results had shown that, in function of the depth, the atomic ratio values C/N were constants, while the atomic ratio C/O and C/H decresed. The concentrations of free radicals of the humic substances were 0.08 to 5.38 x 1018 spins g-1 of carbon, indicating difference in the humification levels of HS extracted from Amazonian soils. The HS extracted in flooded regions showed bigger spins concentrations comparing to ones extracted in unflooded regions, showing that the humidity influences in the process of humification. The NMR of 13C dates showed the sequence of percentage of kind of carbon: aliphatic > ethers/hydroxyls > carboxyls/esthers/amides > aromatics > phenols @ carbonyls of aldehydes and ketones for HS samples extracted of the differences profiles of the Amazonian soils studied.
Orientador: André Henrique Rosa
Coorientador: Julio Cesar Rocha
Banca: Wilson Tadeu Lopes da Silva
Banca: Marisa Veiga Capela
Banca: Isabele Rodrigues Nascimento
Banca: Ézio Sargentini Junior
Doutor
O'Hearn, Connor E. "Sustainable Coffee Farming in Hawai'i: Gathering GIS Data to Inform Development and Planning in the Rainforest and Protect Natural and Historic Features". Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami161890711019104.
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