With the help of the calculation of adiabatic temperature and thermodynamic analysis of the reactive system the autaurs discuss possibility about system of V 2O 5-TiO 2-Al by Self-propagating High-temperature synthesis(SHS).Hydrogen Storage V 3TiNi 0.56 Al 0.2 by SHS is studied by XRD,SEM and scanning electron microscopy.The experiment result indicates that it has same microstructure between synthesization by SHS and other ways.PCT curve indicated that alloy has certain hydrogen storage capability,saturated capacity of hydrogen storage is 0.092 L/g,which is a little lower than alloy by other ways. 相似文献
BACKGROUND: Platelets are of great importance in the pathogenesis of endotoxemia. Although thrombocytopenia is used as a diagnostic sign of endotoxemia, changes in values for platelet indices (plateletcrit [PCT], mean platelet volume [MPV], and platelet size distribution width [PDW]) in response to endotoxin are still unknown. OBJECTIVE: The aim of this study was to evaluate platelet count and its relations with platelet indices in a canine model of endotoxemia. Methods: Twenty dogs were divided into 2 groups of 10 each, and treated intravenously with Escherichia coli endotoxin (1 mg/kg) or vehicle. Venous blood samples were collected before treatment (0 hour) and 0.5, 1, 2, 4, 6, 8, 12, and 24 hours after treatment. Platelet counts and indices were determined on a CELL-DYN hematology analyzer. RESULTS: The platelet count and PCT decreased by a mean of 73% and 93%, respectively (P<.001), at 0.5 hour, and remained 70% and 85% lower than baseline values (P<.001) for 24 hours after endotoxin injection. MPV and PDW increased by a mean of 28% and 45%, respectively (P<.01), at 0.5 hour, and remained increased by 7% and 16% over baseline values for 24 hours (P<.01-.001). Platelet count correlated positively with PCT (P<.001), but correlated negatively with MPV (P<.001) and PDW (P<.01). CONCLUSIONS: Changes in platelet count and its association with platelet indices may reflect changes in platelet production and reactivity. Platelet indices have potential value in the diagnosis and monitoring of dogs and humans with endotoxemia. 相似文献
The cellular immune response in BALB/c mice mesenteric granulomas (MG) was analysed by the means of functional ultrastructure and the assessment of the presence or absence of asynchronous plasma cells in situ.
Results from this study establish: (a) the sequential events involved in the genesis of the oil-induced granulomas, (b) the weak T-cellular immune response and the almost absence of these cells in mitosis, (c) the presence of asynchronous plasma cells of type II was found in mice Nos. 8, 9, 10 and 11 and they were considered to be plasma cell mutants of temporary type, to indicate the first step of this cell alienation in tumorigenesis, (d) the high ratio of peritoneal macrophages was found and connected with what is known about it in the literature. It was speculated that the supraoptimal presence of peritoneal macrophages could have been responsible for the appearance of plasma cell mutants and (e) four morphological types of macrophages have been found in this animal's oil-induced MG, representing different stages of the monocyte transformation in situ. 相似文献