Triaxial woven fabrics are attractive for industrial applications as a rein forcement of composite materials. In this article, tensile properties and fracture behaviors of carbon fiber triaxial woven fabric composites were discussed by comparing with biaxial woven fabric composites. Moreover, the effect of weave structure on the tensile properties of the triaxial woven fabric composites was investigated. Triaxial woven fabric composites were isotropic in modulus, and anisotropic in strength. Tensile properties of basic woven fabric composites were superior compared to the Bi-Plain and biaxial woven fabric com posites. The fracture mechanisms of triaxial woven fabric composites varied with fiber ori entation. This was observed from experimental data of AE (acoustic emission) mea surement and numerical analysis.

Superficial cluster of differentiation (CD)34-positive fibroblastic tumor (SCPFT) is a rare mesenchymal neoplasm of borderline malignancy. It is characterized by a superficial location, marked cellular pleomorphism, an extremely low incidence of mitotic figures, and strong CD34 immunohistochemical positivity. As SCPFT is a recently described neoplasm, its characteristics are yet to be fully elucidated. To the best of our knowledge, no detailed studies regarding the imaging findings and cytogenetic analyses of SCPFTs exist. The present study describes a typical case of an 18-year-old man who developed an SCPFT measuring 87×70×80 mm in the subcutaneous adipose tissue of his right thigh. Computed tomography (CT) revealed a well-marginated tumor without calcification, and the enhancement on CT was weak. The tumor demonstrated abnormal uptake on 2-(18F) fluoro-2-deoxy-D-glucose positron emission tomography (PET), with a maximum standardized uptake value of 2.57. Magnetic resonance imaging (MRI) revealed a clearly defined tumor that exhibited homogeneous low signal intensity on T1-weighted imaging and high signal intensity on T2-weighted imaging, with small lobulated structures. Histopathologically, the tumor was composed of irregular spindle-to-oval-shaped cells with eosinophilic glassy cytoplasm and hyperchromatic, bizarre and pleomorphic nuclei that frequently exhibited intranuclear pseudoinclusions. Immunohistochemically, the tumor cells were diffusely and strongly positive for CD34. The Mindbomb E3 ubiquitin protein ligase 1 labeling index was 8.6%. Ultrastructurally, the tumor cells exhibited irregular or convoluted nuclei with abundant euchromatin-prominent nucleoli. The cytoplasmic organelles consisted of scattered, abundant rough endoplasmic reticulum, mitochondria, lysosomes, ribosomal rosettes and aggregated lipid globules. Of 18 metaphase cells identified, 2 demonstrated translocation between chromosomes 2 and 5 in cytogenetic studies. To the best of our knowledge, this is the first study describing imaging data (CT, MRI and PET-CT) and chromosomal aberrations for SCPFT.

Commingled yarn has been developed in order to overcome the difficulties that are experienced when thermoplastic materials are impregnated to reinforce composite materials. Braid is one of the preforming techniques in the reinforcement configuration of composite materials. In this article, tensile properties of thermoplastic braided composites with commingled yarn as structural members are discussed. It is clear that the molding of thermoplastic braided composites with commingled yarn could be performed in compara tively low molding pressure and short holding time. The middle-end-fiber and axial fiber were used to raise the tensile strength of thermoplastic braided composites. Thermoplastic braided composites with the commingled yarn-using glass fiber bundle as middle-end- fiber and axial fiber—had superior tensile properties.

In this article, the tensile behaviors of braided flat bar are discussed. Braided flat bars are fabricated with glass fiber and epoxy resin. Consequently, it can be confirmed that reinforcements which continuously orient in braided composites highly contribute to the rise of tensile properties. Moreover, the numerical analysis method is proposed for estimating the tensile behaviors of braided flat bar. An analytical model can be developed to consider the continuity and crimp of fibers, and can faithfully express the braiding structure. The calculation time and the waste can be reduced by using this analy sis method, because an analytical model consists of few nodes and elements. The validity of this analysis method is examined by comparing predicted results with experimental data and then the predicted results well agree with experimental data. Accordingly, it was clear that the tensile behavior of the braided flat bar could be estimated by this analysis method.

Abstract. In specific-pathogen-free chickens infected with the highly virulent HPS-2 strain or virulent reference GBF-1 strain of infectious bursal disease virus (IBDV), pathologic changes of the bone marrow were investigated. On histologic examination, bone marrow lesions were prominent in the HPS-2 group but only mild in the GBF-1 group. The bone marrow of the HPS-2 group showed severe lysis and depletion of heterophil myelocytes with pyknotic nuclear alteration 2-3 days after inoculation. On examination with an electron microscope, heterophil myelocytes were characterized by shrinkage of the cytoplasm and peripheral condensation of nuclear chromatin. IBDV particles were not detected in altered myelocytes. A terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labeling method demonstrated a positive reaction in only heterophil myelocytes. In contrast, nucleosomal DNA fragmentation in HPS-2-infected bone marrow cells was indiscernible by agarose gel electrophoresis. These findings indicate that lysis of bone marrow cells is selectively induced in heterophil myelocytes at an early stage after IBDV infection and independent of virus replication.