Texture Assessment in SCS-6 Fibers from Ultrasonic Dispersion Measurements

Advanced fibers used to reinforce composite materials exhibit complicated morphology. Typically, the fiber consists of a cylindrical core embedded in a cladding region followed by a distinct interface zone separating the fiber system from the matrix region. In addition, the cladding region itself often consists of subregions which can be identified as more or less distinct layers. According to the simplest micromechanical models these coaxial layers are assumed to be isotropic and homogeneous. At low frequencies when the acoustic wavelength is much larger than the radius of the fiber, such a composite fiber exhibits significant anisotropy of transversely symmetric nature manifested by higher axial stiffness relative to the radial one. This macroscopic anisotropy is caused by the coaxial structure and the possibly imperfect interfaces between the layers. The main goal of this study was to determine whether this structural anisotropy produced by the presence of microscopically isotropic and homogeneous constituents is sufficient to account for all of the macroscopic anisotropy observed in real fibers or, in addition, microscopic anisotropy caused by some texturing in the constituents themselves is needed to properly model the fiber at ultrasonic frequencies. Apparent texturing in the constituents can be caused by either real microscopic anisotropy due to preferred crystallographic orientation of grain growth during manufacturing or by additional structural anisotropy due to strong radial inhomogeneity in the material composition, e.g., increasing carbon content in the silicon carbide caladding

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Not AvailableTo evaluate the efficiency of different microalgae in larval rearing of Indian white shrimp, Penaeus indicus, three different microalgae: Tetraselmis sp., Chaetoceros gra-cilis and Thalassiosira weissflogii were fed to the shrimp larvae either individually or in combination of two (1:1). The experiment showed that the survival, growth and stage conversion rate were significantly (p < 0.05) higher in combination of T. weiss-flogii: Tetraselmis sp. followed by T. weissflogii: C. gracilis. Further, significantly faster conversion rate was found in the treatment fed with combination diet (T. weissflogii: Tetraselmis and T. weissflogii: C. gracilis). The growth kinetics of three algae revealed that T. weissflogii had better growth potential than other two algae. The nutrient profiles of three microalgae also underline the nutritional superiority of T. weissflogiiin terms of lipid, protein and essential fatty acids (EFA) over the others. Moreover, T. weissflogii showed better antimicrobial properties compared to other algae.Not Availabl

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Not AvailableTo evaluate the efficiency of different microalgae in larval rearing of Indian white shrimp, Penaeus indicus, three different microalgae: Tetraselmis sp., Chaetoceros gracilis and Thalassiosira weissflogii were fed to the shrimp larvae either individually or in combination of two (1:1). The experiment showed that the survival, growth and stage conversion rate were significantly (p <  0.05) higher in combination of T. weissflogii: Tetraselmis sp. followed by T. weissflogii: C. gracilis. Further, significantly faster conversion rate was found in the treatment fed with combination diet (T. weissflogii: Tetraselmis and T. weissflogii: C. gracilis). The growth kinetics of three algae revealed that T. weissflogii had better growth potential than other two algae. The nutrient profiles of three microalgae also underline the nutritional superiority of T. weissflogii in terms of lipid, protein and essential fatty acids (EFA) over the others. Moreover, T. weissflogii showed better antimicrobial properties compared to other algae.Not AvailableICA

Adult precursor B lymphoblastic leukemia in Shanghai, China: Characterization of phenotype, cytogenetics and outcome for 137 consecutive cases

Acute lymphoblastic leukemia (ALL) accounts for 20-30% of adult leukemia in the West. However, detailed studies of B-cell-specific ALL in adult Asian populations are lacking. We diagnosed and characterized 137 consecutive cases of precursor B lymphoblastic leukemia (precursor B-cell ALL) presented to our laboratory in Shanghai using the WHO 2001 classification system. Patient clinical, phenotypic and cytogenetic characteristics were correlated with outcome. In contrast to Western studies, females (71) outnumbered males (66) partly due to an increased prevalence of the CD10- pro B-cell phenotype. Females with a CD10- pro B-cell phenotype exhibited significantly better overall survival than males. The most common cytogenetic abnormality was the Philadelphia chromosome (PH/BCR/ABL) which was found in approximately 37% of the cases. Cases of precursor B cell ALL lacking the PH/BCR/ABL genotype exhibited a pronounced age-dependent, gender prevalence with a modal age in the sixth decade for females compared to the second decade for males. These findings suggest significant geographic heterogeneity in precursor B-cell ALL which may be of both etiological and therapeutic significance. © 2009 The Japanese Society of Hematology.link_to_subscribed_fulltex