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In this paper, we studied the influence of different concentrations of chlorothalonil which was commonly used in North China, on the activities of soil invertase, catalase and urease. The results showed that the influence trend of chlorothalonil at different doses on soil enzyme activity was almost the same. For soil catalase, it showed significant activation. For soil urease, it showed stimulation...
The paper studies change of enzyme activity with increasing cropping years in greenhouse soil. We furthermore took mancozeb, which was a fungicide commonly used in greenhouse soil in North China, as an example to study the change difference of greenhouse soil enzyme activity with different cropping years after addition of external agricultural chemical material. We found that with increasing cropping...
In this paper, we studied the effects of three fungicides (ehlorothalonil, mancozed and propamocarb hydrochloride), which were commonly used in north of China, on the activity of greenhouse soil enzyme. It was shown that ehlorothalonil, mancozed and propamocarb hydrochloride had insignificant effects on sucrase and urease activities at concentration of 10 mg·kg-1 and 50 mg·kg-1, while they had significant...
By using the PAGE (Poly Acrylamide Gel Electrophoresis), the effect of water-borne Cu2+ on the isozymes in gills of E. sinensis was studied. The experimental groups were treated with different concentration of Cu2+ as 0.01, 0.10, 1.00, and 5.00 mg/l, respectively. The results showed that different isozymes had specific responses. The activity of LDH and MDH decreased gradually along with the increasing...
The biosorption of arsenate and arsenite from aqueous solutions by spent grains, a by-product of the brewing process, was investigated. The effects of solution pH, contact time and temperature were studied in batch experiments. The initial removal is rapid and equilibrium was established in less than 180 min. Good correlation coefficients were obtained for the pseudo second-order kinetic model. The...
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