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1

Chemical kinetic characteristics of phosphorus migration in aqueous background of wetland

100%
Li H. Y., Zhang G. X., Gao J. H.
Polish Journal of Environmental Studies
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2017
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tom 26
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nr 2
For this paper we simulated wastewater containing organic phosphorus degradation process across the wetland via organic phosphorus containing solutions of different pH values slowly passing the simulation groove so as to explore the chemical kinetic characteristics of phosphorus migration in the aqueous backgrounds of different wetlands. Our study shows that the migration performance of organic phosphorus in the wetland declines while pH value increases, and that the mineralization of organic phosphorus in clay pan increases with enhanced pH value. The mineralization rate of organic phosphorus in the eighth day may reach over 74% (pH≥7) or above 90% when pH = 9.0. The concentration of PO₄³⁻, which is the direct product of mineralization of organic phosphorus, decreases somewhat when the pH value increases or as time passes. Our study provides the parameter basis to explore the purification mechanism and determine the chemical kinetic mode of organic phosphorus migration in aqueous background of the wetland.
2

Effects of active immunization against the recombinant second extracellular loop of sheep Beta2-adrenoceptor on growth and blood biochemical parameters of female rats

76%
Yang B., Bao X. W., Guo Q. Y., Dong W. W., Li H. Y., Gao J. H., Chen Y.
Journal of Animal and Feed Sciences
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2012
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tom 21
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nr 3
The objective of this study was to determine effects of active immunization against the recombinant second extracellular loop of sheep β2 -adrenoceptor (rBAR) on growth performance, carcass parameters, internal organ weight, and some blood biochemical parameters of rats. Forty five six-week-old female Wistar rats were randomly allocated to three groups and received active immunization of rBAR (rBAR-immune group) or adjuvant by subcutaneous injection (contol goup), or oral administration of β-agonist clenbuterol hydrochloride (clenbuterol goup). Results showed that active immunization against rBAR displayed significant antibody titer responses. Growth performance, feed intake, carcass weight and leg muscle weight of rats were increased by oral administration of clenbuterol (P<0.05), but not by rBAR immunization. rBAR immunization increased weight of liver and lungs, and decreased blood urea nitrogen and triglycerides of rats (P<0.05). Abdomen fat weight and concentration of total cholesterol tended to decreased by rBAR immunization (P=0.11 and P=0.087). The results implied that antibody raised against the recombinant second extracellular loop of sheep β2 -AR can mimic part functions of β-agonist.
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