We obtain the structure theorem for -Hopf bimodules over Hopf algebroids, where H is the total algebra of the Hopf algebroid . Based on this theorem, we investigate the structure theorem for comodule algebras over Hopf algebroids.
Thermal decomposition of potassium chlorate in the presence of various additives is studied using thermogravimetric analysis
and differential thermal analysis. Catalytic effects of metal oxides with comparable surface areas are compared, and the catalytic
effects of a number of nonoxide additives are also studied. The nonoxide additives show catalytic activities similar to the
corresponding metal oxides. Metal cations and their electron configurations determine the catalytic activity of various compounds.
Metal cations with partially filledd shells have the highest activity, transition metal cations with completely emptyd orbitals are moderated active, and metal cations with completely filledd shells or noble gas configurations have minimum activity.
In the workplace of an iron foundry total and respirable suspended particulate matter was daily collected with a network of stationary filtration systems, with Andersen cascade impactors and with personal samplers. The performances of the different sampling systems are evaluated. All samples were analysed by instrumental neutron activation analysis. More than 30 elements were determined. The composition of the particulate samples is compared to that of the major emission sources. For visualising and interpretation of the data computer programs for contour plotting, classification and clustering of the elements and the samples are applied. On the basis of their distribution and particle size the elements can be divided in a number of groups, for which easily determined elements are proposed as indicator elements. The results allow an estimate of the impact of the major emission sources on the air quality in the entire workroom. Suggestions for representative sampling techniques and locations are made.
Authors:X. Zhang, Y. Ding, Y. Zhang, Y. Hao, G. Meng, and L. Zhang
Highly oriented single crystal antimony nanowire arrays have been synthesized within anodic aluminum oxide (AAO) template
by pulsed electrodeposition. Thermal behavior and oxidation analysis of the antimony nanowires have been investigated by means
of thermogravimetry and differential scanning calorimetry in Ar and air atmosphere, respectively. Compared to bulk antimony,
the antimony nanowires exhibit a lower sublimation temperature at 496.4°C. Evident oxidation of the Sb nanowires occurs at
429.8°C in air atmosphere and α-Sb2O4 nanowires have been obtained as the oxidation product. The results indicate that the sublimation and the oxidation of the
antimony nanowires in the AAO template is a slow multi-step process. The present results are of relevance when processing
antimony nanowries for thermoelectric applications at high temperatures.
Authors:L. Xiao, Y. Zhang, Q. Li, Q. Zhang, and K. Wang
Fingernails of pathologically diagnosed normal people, light esophageal epitheliosis patients, severe esophageal epitheliosis patients and esophageal cancer patients were irradiated and their elemental contents were determined by INAA. Multivariate statistical treatment of Ca, Cl, K. Mg, Se and Zn data shows that esophageal cancer patients are distinguishable from non-cancer patients. The accuracy computed by neural networks is greater than 80%.
Heat capacities of both the ingot-like and melt-spun Al-Sr alloys have been measured through the temperature range 373 to
1060 K using differential scanning calorimetry. The experimental results show that rapid solidification has a slight effect
on the temperature dependence of the heat capacities of the Al-Sr alloys. The heat capacities of the melt-spun Al-Sr alloys
increase more slowly than those of the ingot-like alloys with increasing temperature from 373 to 900 K. Furthermore, the effect
of rapid solidification on the heat capacities becomes more obvious with increasing Sr concentration in the Al-Sr alloys.
The data of the heat capacities between 373 and 900 K have been fitted with the least square method and a linear dependence
on temperature was assumed for that temperature range.
Chlorophyll content is positively correlated with photosynthetic rate. However, little is known about the genetic correlation between grain yield and chlorophyll content in the same wheat mapping population. The primary goal of the study was to detect the genetic basis of grain yield and chlorophyll content and their possible roles in the genetic improvement of grain yield in wheat. Here, quantitative trait loci (QTLs) for grain yield and chlorophyll content were studied using a set of 168 doubled haploid (DH) lines derived from a cross between two elite Chinese wheat cultivars, Huapei 3×Yumai 57. The DH population and parents were evaluated for grain yield and chlorophyll content in three environments. A total of 11 additive QTLs and 6 pairs of epistatic QTLs were detected for grain yield and chlorophyll content. Loci, such as
on chromosomes (e.g. 2D, 4A, and 5D) simultaneously controling grain yield and chlorophyll content, showed tight linkages or pleiotropisms. Three novel major QTLs,
, closely linked with the PCR marker
on chromosome 5D, accounted for 10.32%, 12.95%, and 23.29% of the phenotypic variance, respectively. The favorable alleles came from Yumai 57.
Authors:P. Zhang, M. Zhou, X. Zhang, Y. Huo, and H. Ma
Crown rot caused by Fusarium pathogens is one of the most economically destructive diseases of wheat. The objective of this study was to investigate defense-related enzyme responses in wheat seedlings infected with Fusarium graminearum. Three wheat varieties were employed to the experiment. Physiological analysis of varieties indicated that defensive-related enzymes were induced by F. graminearum infection. The superoxide dismutase and peroxidase activities increased dramatically and the phenylalanine ammonia-lyase activity was stimulated to a higher level in resistant variety Hongyouzi than in susceptible variety Wo0102. However, the chitinase activity was higher in susceptible variety Wo0102 than in Hongyouzi after infection. These results suggest that the defense enzymes could be stimulated in wheat seedlings by Fusarium infection.
Zirconium in simulated high level radioactive liquid waste (HLLW) was selectively adsorbed and separated by self-made high adsorption activity silica gel. The selective adsorption mechanism was analyzed according to the structure character of self-made silica gel and performance of zirconium in acid simulated HLLW. The results show that the adsorption selectivity of self-made silica gel for zirconium is strong, because zirconium has higher positive charge and zirconium ion hydrolyzes easily. Distribution coefficient of self-made silica gels for zirconium is 53.5 ml/g. There are 6.5 (OH)/nm2 on the surface on self-made silica gels which provide more adsorption activity places, thus self-made silica gels have higher adsorption capacity for zirconium (31.4 mg/g). The elution rate of the adsorption of zirconium on self-made silica gel by 0.2 mol/l H2C2O4 is more than 99%. The solubility of the self-made silica gel in nitric acid is low, the chemical stability of self-made silica gel is very strong.
The Taihang Mountain Range is located at E112°50′–114°30′, N35°20′–39°30′ in North China. This study aimed to reveal relationships between plant communities, soil variables and topographic variables. Floristic data and environmental data from sixty-eight quadrats of 10 m × 20 m along an elevation gradient from 1050 to 2180 m were analysed by TWINSPAN, DCA and CCA. Eight vegetation formations were recognized, all secondary successional stages following the original broad-leaved deciduous forests’ distraction by human activities. The results showed that the community patterns are related to both soil variables and topographic variables. Among the soil variables, soil N, P, K and organic matter were found to be the most important factors forcing the spatial patterns of plant communities. The vegetation patterns were also significantly correlated with the topographic variables, elevation, slope and aspect. Interactions between the environmental variables were significant. It is concluded that further measures for the conservation of vegetation and protection of soils in the Taihang Mountains must be undertaken.