CHAR

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Related to charring: Charing

TFAP2B

A gene on chromosome 6p12 that encodes a member of the AP-2 family of transcription factors, which activate the transcription of genes involved in proper eye, face, body wall, limb and neural tube development. TFAP2B inhibits C/EBP alpha, MCAM/MUC18 and MYC; it appears to be required for normal face and limb development, and for proper terminal differentiation and function of renal tubular epithelia.

Molecular pathology
TFAP2B mutations cause autosomal dominant Char syndrome.
References in periodicals archive ?
In comparison to oak, the charring rate of aspen samples as well as those of pine and fir were higher.
The average charring rate of oak was 0.32 mm/min, fir--0.58 mm/min, pine--0.60 mm/min, aspen--0.61 mm/min.
After 45 minutes of heating, the charring rate of oak was 0.44 mm/min, aspen--0.79 mm/min, fir--0.77 mm/min, pine--0.76 mm/min.
The regression analysis of the charring rate for different species of wood was made, equations (3)-(6) were obtained, the predicted values of the charring rate calculated using the equations (3)-(6) are presented in Fig.
The regression analysis resulted in the highest value of the correlation coefficient R = 0.9597, which was obtained in predicting the charring rate of aspen, fir R = 0.9515, oak--R = 0.9424 and pine--R = 0.9240, which was the lowest value.
To predict the charring rate of different species of wood (oak, aspen, pine and fir), the following equations (3)-(6) can be used:
The aim of this article is to study the effect of variability of charring along the members of wooden floor and wall assemblies insulated with heat-resistant mineral wools, such as stone wool and heat-resistant glass wool, and to detect the possible influence of density of wood on the charring rate.
Charring is the most important parameter in the design of timber-frame members for fire resistance.
Charring takes place mainly on the fire-exposed narrow side.
The notional charring rate of small sized timber frame members is given as
where [[beta].sub.0] is the one-dimensional charring rate for timber, given as
Coefficients [k.sub.p], [k.sub.s] and [k.sub.n] are explained as follows: The protection factor [k.sub.p] takes the influence of protective cladding on charring into account.