Temperature Compensation
Mostrando 1-12 de 94 artigos, teses e dissertações.
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1. Videothermometry to evaluate metabolic activity in real time during pneumectomy in rats
Abstract Purpose: To evaluate, in rats, the open field videothermometry in real time while performing left pneumonectomy for early diagnosis of cardiopulmonary changes. Methods: Twelve non-specific pathogen-free Wistar rats were randomly allocated into two groups; pneumectomy group (GP) and sham surgery group (GS). Mean arterial pressure, videothermometry
Acta Cir. Bras.. Publicado em: 21/03/2019
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2. Thermodynamic properties of Buriti (Mauritia flexuosa) tree gum
Abstract Moisture adsorption and desorption isotherms from buriti tree gum (BG) were obtained at different temperatures (25 to 55 °C) in a water activity range of 0.1 to 0.9. The isotherms were classified as type II. The hysteresis loop and moisture of the monolayer decreased as temperature increased and Halsey’s equation proved able to predict with good
Food Sci. Technol. Publicado em: 02/07/2018
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3. THERMODYNAMIC PROPERTIES OF SORPTION OF RICE IN THE HUSK
ABSTRACT This study aimed to determine the thermodynamic properties of sorption processes (desorption and adsorption) of rice in the husk, cv. Urucuia. A static-gravimetric method was used to reach equilibrium moisture content at different temperatures (10, 20, 30, 40, and 50 °C ± 1°C) and relative humidity levels (10, 30, 50, 70, and 90 % ± 2%). A decre
Eng. Agríc.. Publicado em: 2018-06
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4. Compensation technique for environmental and light source power variations applied in a polymer optical fiber curvature sensor for wearable devices
Abstract Introduction Polymer optical fibers (POF) are lightweight, present high elastic strain limits, fracture toughness, flexibility in bend, and are not influenced by electromagnetic fields. These characteristics enable the application of POF as curvature sensor and can overcome the limitations of the conventional technologies, especially for wearable a
Res. Biomed. Eng.. Publicado em: 05/03/2018
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5. Growth and Characterization of AlxGa1-xAs Obtained by Metallic-Arsenic-Based-MOCVD
In this work reports results related to growth and characterization of AlxGa1-xAs epilayers, which were grown in a metallic-arsenic-based-MOCVD system. The gallium and aluminium used precursors were trimethylgallium (TMGa) and trimethylaluminium (TMAl), respectively. By photoluminescence measurements observed, that only samples grown at temperatures above 80
Mat. Res.. Publicado em: 23/03/2017
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6. Effects of both ecdysone and the acclimation to low temperature, on growth and metabolic rate of juvenile freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae)
Growth, metabolic rate, and energy reserves of Cherax quadricarinatus (von Martens, 1868) juveniles were evaluated in crayfish acclimated for 16 weeks to either 25ºC (temperature near optimum) or 20ºC (marginal for the species). Additionally, the modulating effect of ecdsyone on acclimation was studied. After 12 weeks of exposure, weight gain of both exper
Iheringia, Sér. Zool.. Publicado em: 2013-06
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7. Efeito de cátions alcalinos e cinética complexa durante a eletro-oxidação de etileno glicol / Cations effect and complex kinetics during ethylene glycol electro-oxidation
Exemplos de comportamento complexo podem ser encontrados em vários sistemas na natureza, como dinâmica de populações, formação de padrões em pelos de animais e a auto regulação do metabolismo. Em geral, sistemas químicos e eletroquímicos apresentam também esse tipo de comportamento complexo e são comumente escolhidos como sistemas-modelo para es
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/05/2012
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8. Efeito da granulometria e da embalagem na sorção de água pelo café torrado e moído / Effect of granulometry and packaging on water sorption by roasted and ground coffee
The objective of this study was to evaluate the effect of granulometry and types of packaging on the water sorption by roasted and ground coffee. Arabica coffee grains were utilized with an initial water content of 0.1234 kgw kgdm -1, roasted until the medium roast point, with a weight loss of 17%, in wich four granulometric levels were established: whole gr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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9. ANEMÔMETRO BASEADO EM SENSOR TERMO-RESISTIVO OPERANDO A TEMPERATURA CONSTANTE COM AJUSTE AUTOMÁTICO DE FAIXA DINÂMICA / ANEMOMETER SENSOR BASED ON OPERATING A TERMINATION-RESIST CONSTANT TEMPERATURE WITH AUTOMATIC ADJUSTMENT OF TRACK DYNAMICS
O anemômetro de fio quente, baseado em sensor termo-resistivo operando à temperatura constante, é uma arquitetura clássica que é vastamente encontrada na bibliografia. Todavia, esta arquitetura pode apresentar um problema devido à variação da faixa dinâmica de sua tensão de saída para variações significativas da temperatura do fluido. Neste trab
Publicado em: 2010
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10. Determination of non-isothermal crystallization rate constant for pseudo-experimental calorimetric data
In the present work, non-isothermal crystallization data in the form of heat flow vs. temperature curves were generated using the Nakamura Model and its typical parameters reported in the literature for polypropylene. The values obtained for these curves were added to experimental baselines of a DSC to introduce typical noises in the calorimetric traces gene
Materials Research. Publicado em: 2009-06
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11. Study and compensation of bias drift, scale factor stability and linearity of a conditioning and sign processing circuit of an interferometric fiber optic gyroscope / Estudo e compensação da deriva termica, estabilidade do fator de escala e lineariazação de um circuito de condicionamento e processamento de sinais de girometro interferometrico a fibra optica
Fiber Optic gyroscopes are an important part of inertial navigation systems. To meet the necessary specifications required for application in inertial systems, it is mandatory that the electronic Sagnac demodulator uses state of the art devices. The proposal of this work is to study and develop a technique to correct all together for the nonlinearities, the
Publicado em: 2009
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12. Temperature effect in the oscillatory electro-oxidation of formic acid on platinum: experiments and simulations / Efeito da temperatura na eletro-oxidação oscilatória de ácido fórmico sobre platina: experimentos e simulações
Ritmos biológicos são regulados por mecanismos homeostáticos que asseguram a confiabilidade funcional do relógio fisiológico independentemente de mudanças de temperatura no ambiente. Compensação de temperatura, ou a independência do período oscilatório em relação à temperatura, é conhecida por exercer um papel central em muitos ritmos biológi
Publicado em: 2009