0000000001005307
AUTHOR
C. Sanfilippo
Assessment of performance degradation of hybrid flax-glass fiber reinforced epoxy composites during a salt spray fog/dry aging cycle
The main goal of this paper is the evaluation of the performances reversibility of hybrid composites when they are dried after being aged in salt-fog environment. To this aim, epoxy composites reinforced with flax and glass fabrics respectively in the internal and external laminae were at first exposed to salt-fog (i.e., identified as wet phase) and then stored in controlled conditions (i.e., identified as dry phase). The flexural properties evolution of these composites as well as their water uptake and contact angle were monitored at varying time of both phases. The flexural strength and modulus of hybrid composites is 23.4% (17.9%) and 15.5% (12.9%) lower than unaged ones after 30 (15) d…
An experimental investigation on performances recovery of glass fiber reinforced composites exposed to a salt-fog/dry cycle
The main goal of this paper is the evaluation of the properties reversibility of glass fiber reinforced polymers (GFRPs) under discontinuous exposure to aggressive environmental conditions, typical of marine applications. To this aim, the GFRP manufactured through vacuum infusion process has been initially aged in humid conditions (i.e., exposure to salt-fog at 35 ◦C) for 15 and 30 days and then stored under controlled dry conditions (i.e., 50% R.H. and 23 ◦C) for times varying between 0 and 21 days. In order to evaluate the recover capability of this material, its water uptake has been monitored along the quasi-static flexural properties during the entire humid/dry cycle. Moreover, both 3D…
Diagnosis and follow-up of complex congenital malformations/mental retardation (MRA/MR)
Complex congenital malformations, associated in 30% of cases with mental retardation, recognize different etiologies: environmental causes, mendelian disease, chromosomal abnormalities, imprinted anomalies. Frequently complex congenital disorders are rare diseases. Rare diseases are infrequent pathological conditions (prevalence in the general population of less than 1/2.000 live births1), and often poorly understood. Because of their rarity these morbid conditions often either go undiagnosed or are diagnosed late with a negative impact for both the affected person and the family. The birth prevalence is high (2-4% of all births). The diagnosis is essential to program complex and integrated…
Malformations of central nervous system: General issues
Malformations of the central nervous system (CNS) encompass a heterogeneous group of congenital anomalies that may be isolated or appear as part of a genetic syndrome. Advances in identifying the genetic etiology underlying many CNS malformation and syndromes have led to the current genetic-based classifications that allows us to better estimate prognosis and potential complications. Herein, we discuss the main genetic, clinical and radiological features and their implications for diagnostic testing and disease management
A new mutation in EDA gene in X-linked hypohidrotic ectodermal dysplasia associated with keratoconus
Hypohidrotic ectodermal dysplasia (HED) was first described in 1848 by Thurnam. HED belongs to ectodermal dysplasias (EDs), which are developmental impairments of ectodermal-derived tissues. X-linked hypohidrotic ectodermal dysplasia (XLHED) is the most common form of the EDs and consists in abnormal development of teeth, hair, and eccrine sweat glands. XLHED is determined by mutations in the ED1 gene, which is responsible for the coding of ectodysplasin-A(EDA-A), a protein that regulates ectodermal appendage formation. In the present study we found both in our proband and in the mother the same missense mutation in exon 9 (c.957 CA), which resulted in an aminoacid change at position 319 (S…