Prediction of vapor–moisture equilibriums for a wood–moisture system using a modified UNIQUAC model

Ma, Qian; Rudolph, Victor

doi:10.1016/j.ces.2006.05.021

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…If not, an additional mechanism known as mechano-sorption is involved [15][16][17]; this mechanism is not taken into account herein. Usually, an hysteresis is obtained between adsorption and desorption, due to chemical interactions [18,19]. We will not take this effect into account here, and we will consider the average curve of Figure 1.…”

Section: Sorption Curve Swelling and Shrinkagementioning

confidence: 98%

A partitioning strategy for the coupled hygromechanical analysis with application to wood structures of cultural heritage

Dureisseix

Marcon

2011

Numerical Meth Engineering

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SUMMARYOne of the main causes for damage of panel paintings of cultural heritage is due to the environmental micro-climatic variations. Wood science and numerical modeling may help to analyze and calibrate restoration interventions, to predict the behavior of the artwork, taking into account the individual painted panels and the conservation environment. In this article, a partitioning numerical strategy is proposed to predict by simulation the behavior of such artworks. It is based on a multiphysics partition focusing on the interactions between the different physics that are described in a thermodynamical framework. It is applied to the case study of Mona Lisa, modeled as a strongly coupled hygromechanical structure. The strategy is designed to couple two different modelings: a plate model for the mechanical behavior of the panel and 1D transverse diffusion for the moisture evolution.

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Section: Sorption Curve Swelling and Shrinkagementioning

confidence: 98%

A partitioning strategy for the coupled hygromechanical analysis with application to wood structures of cultural heritage

Dureisseix

Marcon

2011

Numerical Meth Engineering

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“…Figure 1. The structural formula of cellulose [31] A hydrogen bonding connects the glucan chains with each other. The joint between these glucan chains start to form a microfibril, which is considered the basic structural unit of cellulose.…”

Section: Structure Of Cellulosementioning

confidence: 99%

Production of Green Biocellulose Nanofibers Through Utilizing Agricultural Wastes

Al-Abdallah¹

2021

Preprint

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In the present study, the green Biocellulose Nanofibers (BC), a vitally emerging biomaterial, was produced by fermentation of wheat straw (WS), as a widely available agricultural waste, using. Two different fermentation methods were used; Separate Hydrolysis and Fermentation (SHF), and Simultaneous Saccharification and Fermentation (SSF). Different acidic and enzymatic WS pretreatment conditions were used to understand the effect of pretreatment conditions on BC production. Afterward, sugar hydrolsates were simultaneously or separately inoculated with Gluconacetobacter Xylinum bacterium (i.e., for SSF and SHF, respectively), at optimum production conditions in shake flasks for 7 days to produce the biocellulose nanofibers. BC productions of 9.7 g/L in SHF and 10.8 g/L in SSF were achieved when WS was pretreated with dilute acids. Enzymatic treatment of WS after acidic pretreatment increased sugars’ concentrations from the hydrolysis, which increased BC production in SHF to 10.6 g/L. However, enzymes in SSF broke cellulose I alpha linkage in BC and decreased its production compared to no enzymatic treatment. Results show that glucose extracted from WS (~55% of total sugars) was found essential for the cellular metabolism, while xylose (~28% of total sugars) was highly consumed during cells growth phase. Generally, increasing thermal treatment, time and temperature, resulted in increasing furfural concentration. This observed to inhibits bacterial cells growth and leads to lower nanofibers yield when exists at concentration higher than 1 g/L threshold. In general, results obtained in the present study demonstrate the ability of utilizing agricultural wastes in the fermentation production of BC. Such a step is expected to eliminate cost of expensive pure sugars as a carbon source in the fermentation. Also the study shows an improved production yield by using effective fermentation techniques as SSF compared to classical methods used in literature.

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“…Tiene una composición química similar a la celulosa (C 6 H 10 O 5 ) x pero presenta un peso molecular menor (Siau 1995) y la estructura de los constituyentes es diferente (Ma and Rudolph 2006). El grado de polimerización es de 200-300 unidades (Hill 2006).…”

Section: Hemicelulosaunclassified

Determinación de la higroscopicidad y comportamiento termodinámico de la madera juvenil y madura a través de sus isotermas de sorción

García¹

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Prediction of vapor–moisture equilibriums for a wood–moisture system using a modified UNIQUAC model

Cited by 6 publications

References 18 publications

A partitioning strategy for the coupled hygromechanical analysis with application to wood structures of cultural heritage

A partitioning strategy for the coupled hygromechanical analysis with application to wood structures of cultural heritage

Production of Green Biocellulose Nanofibers Through Utilizing Agricultural Wastes

Determinación de la higroscopicidad y comportamiento termodinámico de la madera juvenil y madura a través de sus isotermas de sorción

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