Diffusion In Solids
Mostrando 13-17 de 17 artigos, teses e dissertações.
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13. Nitrogen implantaion in iron-based system : study of hardness and its relation with N concentration / Implantação de nitrogenio em sistemas baseados em ferro : estudo da dureza e sua relação com a concentração de N
Apresente tese trata sobre a implantação de nitrogênio em sistemas baseados em ferro. Duas técnicas de nitretação são utilizadas, plasma pulsado e feixe iônico por canhão de íons. Os parâmetros de nitretação são otimizados com a finalidade de obter um melhoramento na dureza superficial destes sistemas, isto é, em algumas dezenas de mícron. Ta
Publicado em: 2003
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14. Estudo da desidratação de tomates em pedaços com pré-tratamento osmótico
Vegetables drying plays an important role in the field of food dehydration, being a very old practice that was originated from sun drying items of food in order to preserve them to be consumed during the periods of scarcity. One of these vegetables is the tomato, that was originally grown in South America. Tomatoes are easily perishable after being picked up
Publicado em: 2002
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15. Porfirinas pentacianoferrato e estruturas supramoleculares auto-organizadas / New pentacyanoferrate porphyrin and supramolecular self-assembled structures
The present work describes the synthesis and spectroscopic and electrochemical properties of meso-{tetrakis-(3 pyridylpentacyanoferrate)} porphyrin (PPCF) and its Prussian Blue type materiais, obtained by self-assembly reaction between the new porphyrin and transition metal ions. The new materiais were characterized by Mass, UV -Vis, Infrared, Resonance Rama
Publicado em: 2000
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16. Modelo termodinamico para o aquecimento não-linear, a laser, e suas aplicações ao processamento de materiais
The subject of the computer modeling of the laser processing of materials continues to be highly topical in Materials Science. Basic to such an achievement was to have an well posed proposition to determine the time evolution of the temperature anywhere in the laser heated sample. Though models of such a kind abound in the literature, they are either rather
Publicado em: 1994
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17. Cluster Structure of Anaerobic Aggregates of an Expanded Granular Sludge Bed Reactor
The metabolic properties and ultrastructure of mesophilic aggregates from a full-scale expanded granular sludge bed reactor treating brewery wastewater are described. The aggregates had a very high methanogenic activity on acetate (17.19 mmol of CH4/g of volatile suspended solids [VSS]·day or 1.1 g of CH4 chemical oxygen demand/g of VSS·day). Fluorescent i
American Society for Microbiology.