New findings, pathophysiology, and antigen analysis in pollen-food allergy syndrome
CURRENT OPINION IN ALLERGY AND CLINICAL IMMUNOLOGY
Authors: Yagami, Akiko; Ebisawa, Motohiro
Abstract
Purpose of review PFAS shows various cross-reactivities with antigens because of the area in which the patient resides and dietary habits, and progress in component allergen analysis in recent years has clarified the pathogenesis. This review describes newly identified findings for antigens involved in PFAS. Recent findings We describe recent findings for PR-10 family, profilin and LTP, as known major antigens for PFAS. Microarrays of allergen components have significantly improved the ability to describe IgE profiles. In addition, we describe a new antigen, GRP, in the fruit pulp of recently identified fruit. Summary PFAS is a food allergy based on the cross-reactivity of pollen antigens and food antigens. Symptoms induced by sensitization differ depending on the specific antigen. The functions of each antigen are diverse, and even the same antigen can cause different symptoms. As analytical techniques progress, the findings will help to establish treatments, such as specific immunotherapy.
A study on the multi-axial fatigue failure behavior of notched composite laminates
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Authors: Qiao, Yao; Deleo, Antonio Alessandro; Salviato, Marco
Abstract
Composite structures must endure a great variety of multi-axial stress states during their lifespan while guaranteeing their structural integrity and functional performance. Understanding the fatigue behavior of these materials, especially in the presence of notches that are ubiquitous in structural design, lies at the hearth of this study which presents a comprehensive investigation of the fracturing behavior of notched quasi-isotropic [+ 45/90/45/0], and cross-ply [0/90](2s) laminates under multi-axial quasi-static and fatigue loading. The investigation of the S-N curves and stiffness degradation, and the analysis of the damage mechanisms via micro-computed tomography clarified the effects of the multi-axiality ratio and the notch configuration. Furthermore, it allowed to conclude that damage progression under fatigue loading can be substantially different compared to the quasi-static case. Future efforts in the formulation of efficient fatigue models will need to account for the transition in damaging behavior in the context of the type of applied load, the evolution of the local multiaxiality ratio, the structure size and geometry, and stacking sequence. By providing important data for model calibration and validation, this study represents a first step towards this important goal.