Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 263 for “"G-1."”.
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A study of some M[x]/G/1 type queues with random breakdowns and bernouilli schedule server vacations based on a single vacation policy
Queueing systems arise in modelling of many practical applications related to computer sciences, telecommunication networks, manufacturing and production, human computer interaction, and so on. The classical queueing system, even vacation queues or queues subject to breakdown, might not be …
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The metabolic profile of cardiac and skeletal muscle tissue from captive emus (Dromaius novaehollandiae) raised in northern Colorado: implications for assessing muscle health for emus with splayed-leg disorder
Emus (Dromaius novaehollandiae) are native Australian flightless birds commonly farmed in North America for oil and meat. The emu industry has grown in popularity, though the physiology of farm-raised emus has not been studied extensively. Emus are efficient at both anaerobic sprinting and aerobic, …
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Seleção de microrganismos para a conversão de xilose em xilitol
Foram avaliadas duzentos e cinquenta e duas leveduras isoladas do ambiente da indústria de laticínios, dezoito leveduras isoladas de frutos de café e onze fungos filamentosos da micoteca do Departamento de Microbiologia da Universidade Federal de Viçosa, para obtenção de xilitol a partir de …
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Avaliação de resinas de troca iônica para o tratamento de hidrolisado hemicelulósico de bagaço de cana-de-açúcar
No presente trabalho avaliou-se o emprego de resinas de troca iônica quanto a sua capacidade em adsorver ácido acético, furfural e hidróximetil furfural presentes no hidrolisado hemicelulósico de bagaço de cana-de-áçúcar obtido por hidrólise ácida. A metodologia empregada consistiu em determinar, …
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Caracterização física, química e valor nutricional de espécies frutíferas do Cerrado de Minas Gerais
O presente estudo teve como objetivos avaliar as características físicas, a composição química e físico-química, a ocorrência e o conteúdo de carotenóides (α-caroteno, β-caroteno, β-criptoxantina e licopeno), vitamina C (ácido ascórbico e ácido desidroascórbico), vitamina E (α-, β-, γ- e …
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G-Protein-Coupled Estrogen Receptor-1 (GPER): A Potential Target For Xenoestrogens During Vertebrate Embryogenesis.
<p>G-protein-coupled estrogen receptor 1 (GPER) is a G-protein-coupled receptor that induces non-genomic signaling in response to some nuclear estrogen receptor ligands. To date, the distribution and functional characterization of GPER within vertebrate organs have been restricted to juvenile and …
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Adsorção de cobre e fósforo em solos contaminados por microplásticos
Resumo: Os microplásticos (MPs) são polímeros sintéticos que podem interferir na dinâmica de nutrientes no solo. Uma das principais fontes de MPs no solo é a cobertura de plástico mulching utilizada em culturas agrícolas. O objetivo principal deste trabalho foi determinar a adsorção de cobre (Cu) e …
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Cassava root (Manihot Esculenta Crantz) characterisation and evaluation of process-induced changes on functional of its flour
Cassava (Manihot esculenta Crantz) is the world’s most important root crop, highly perishable, mostly grown and consumed in the tropics and subtropics of Asia, South America and Africa. Despite the popularity and utilisation of cassava in tropical and sub-tropical regions of Africa, it is not well …
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The use of organic materials as amendments in the remediation of soils contaminated by lead, copper and zinc
The effectiveness of using amendments in metal stabilization was determined, and their potential for remediation of contaminated soil was evaluated. A combined approach of evaluating soil and plant metal availability as well as microbial respiration was used as an indication of effectiveness of …
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Influence of surface chemistry of carbon materials on inorganic nitrogen contaminants chemisorption
Adsorption of inorganic nitrogen contaminants (INC), namely ammonium (NH4 +), nitrate (NO3-), and nitrite (NO2-), using carbon materials (CMs) such as activated carbon (AC), and biochar (BC) has been widely implemented. This study was based on the hypothesis that surface chemical properties of CMs …
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Digestibility of Common Forage Plants and Energetic Requirements of the Black-Tailed Prairie Dog
<p>Black-tailed prairie dogs (Cynomys ludovicianus) assimilated 51.5 percent of the wheatgrass (Agropyron intermedium) they consumed; thus, they would have to consume 0.148 kcal · g-1 · day-l in order to obtain the 0.076 kcal · g-1 · day-1 they would require to maintain their weight. Prairie dogs …
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Compatibilidade entre Pochonia chlamydosporia e Trichoderma spp. no controle de Meloidogyne javanica em tomateiro
O presente estudo teve como objetivos: a) avaliar a compatibilidade entre Pochonia chlamydosporia (isolado Pc-10) e isolados de Trichoderma sp. em experimentos “in vitro” e em casa de vegetação, e a ação desses organismos sobre Meloidogyne javanica; b) Avaliar se os fungos promovem o crescimento …
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Quantification of titanium dioxide nanoparticles in environmental matricies.
A consistent analytical method incorporating sulfuric acid (H₂SO₄) digestion and ICP-MS quantification for titanium dioxide (TiO₂) was validated for 4 environmentally relevant matrices. The method provided Ti recoveries of 97 ± 2.5%, 91 ± 4.0%, 94 ± 1.8%, and 73 ± 2.6% (mean ± standard deviation) …
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Determination of trace elements in hair for monitoring environmental and occupational exposure
Hair has a number of advantages over more conventional sample types, such as serum, whole blood and urine, as an indicator of the intake and exposure to trace elements. While the analysis of these conventional sample types can only be used as a measure of recent exposure, hair, in contrast, can …
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Interactions of Trace Metals with Plastic Production Pellets in the Marine Environment
This study investigates the interactions between dissolved trace metals and plastic debris under controlled laboratory conditions by using polyethylene pellets as a model plastic particle. Specifically, the study compared virgin pellets sourced from a local moulding plant with those collected from …
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Assessment of the prevalence of pathogenic bacteria in street vended ready-to-eat meats in Windhoek, Namibia
While street vended ready-to-eat meats provide a source of readily available and nutritious meals for the consumers, there is a concern for their safety and microbiological quality. The prevalence of E. coli, Salmonella, Shigella, L. monocytogenes, S. aureus and Enterobacteriaceae was assessed in a …
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Analysis on the international competitiveness of Tunisian palm date fruit Deglet Noor cv. and studies on the effects of physical postharvest treatments on Ectomyelois ceratoniae mortality and fruit quality
[SPA] En el sur de Túnez, el sector de la palmera datilera (Phoenix dactylifera L.) representa el principal recurso socioeconómico del oasis y tiene un papel importante en la agricultura tunecina y el desarrollo de la economía nacional. El dátil es el tercer producto agrícola más exportado en …
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Soil and Wastewater Properties that Influence the Uptake of Anti(retro)viral Pharmaceuticals in Plants
This study evaluated the fate of anti(retro)viral (ARVDs) pharmaceutical compounds in the wastewater-soil-plant-human continuum. Wastewater frequently contains pharmaceutical micropollutants. A cause to worry is the potential uptake and bioaccumulation of these biologically active contaminants via …
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Determination of trace elements in crude oils by ICP-MS using detergent microemulsion.
A method was developed and evaluated in terms of its analytical performance for the determination of Ti, V, Cr, Mn, Ni, Cu, Mo, Cd, Sn and Pb concentrations in three Libyan crude oil samples using ICP-MS. The samples were introduced to the plasma after the formation of microemulsions in which …
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