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Journal of Thermal Analysis and Calorimetry
Authors: C. Barba, M. Martí, A. Roddick-Lanzilotta, A. Manich, J. Carilla, J. L. Parra, and L. Coderch

and relative humidity (RH) [ 9 ]. The moisture sorption isotherm of keratins has been the subject of several studies and models specially developed for describing the shape of the moisture sorption and desorption. The Vrentas and Vrentas model

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stability of the mass was reached). This water content was assumed to be constant, because the laboratory was air-conditioned to meet reference conditions (20 °C, relative humidity ϕ = 40%; this assumption has been checked by repeated determination of the

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Journal of Thermal Analysis and Calorimetry
Authors: Jozef Rychlý, Agnes Lattuati-Derieux, Lyda Matisová-Rychlá, Katarína Csomorová, Ivica Janigová, and Bertrand Lavédrine

in open conditions of ambient air and uncontrolled relative humidity. The aged samples were collected at intervals 6 h, 1, 2, 4, 8, and 16 days, respectively. Visual observations confirmed the increase of the yellowing with time of ageing already

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prepared by mixing the dry mix with the required amount of water for about 3 min. After complete mixing, the resultant paste was molded into cubic specimens by using 1 inch cube moulds. The moulds, containing the pastes, were cured in 100% relative humidity

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experiments. The animals were housed in 6 cages, 4 animals per cage, under a normal 12 h/12 h light/dark schedule with the lights on at 07:00 a.m. They were kept at room temperature (23 ± 2 °C) with a relative humidity of 55 ± 5% and given standard food and

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with free water. Keep the animals in a dark cycle of 12 h/12 h under the conditions of ambient temperature 22–25 °C and relative humidity 60% (under 8:00 light). The experimental protocol was approved by the Animal Ethics Committee of Heilongjiang

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specimens were stored at 23 °C and 95% minimum relative humidity until hydration was stopped at predetermined time intervals. Table 3 Mixture compositions

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Relative humidity RHR Heat release rate RM Residual mass SBE

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PSiMS Sample made with H 2 O 2 /Na 2 SiO 3 /MgSO 4 RH Relative humidity RHR Rate of heat

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.1 ∗ Porosity is derived from ∊ = (1− ρ bulk / ρ particle ) × 100% Each sample was tested in five repeats this round under the same standard experimental conditions of temperature 20 °C and relative humidity 65%. It was

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