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Their structures, acidities, and catalytic activities were investigated and compared using XRD, N2 adsorption-desorption, and in situ FTIR-pyridine adsorption, as well as an evaluation reaction with pseudoionone cyclization.
      
Because of their distinct acid natures, SO42-/TiO2 and S2O82-/TiO2 exhibited catalytic activities for the cyclization of pseudoionone that were much higher than that of SO42-/ZrO2/MCM-41.
      
Using the QSAR models, four new metalloporphyrins with substituted nitro group were designed, and their catalytic activities were predicted.
      
Their photocatalytic activities for formaldehyde (FA) and methyl orange (MO) degradation were tested using degradation rate (η) as an evaluation index.
      
The specific activities of the enzymes involved in secondary metabolism, such as methylmalonyl-coenzyme A mutase (MCM) and methylmalonyl-coenzyme A transcarboxylase (MCT), were detected as well.
      
It maybe due to Co2+ improving the specific activities of methylmalonyl-coenzyme A mutase and methylmalonyl-coenzyme A transcarboxylase.
      
A new method for the synthesis of molybdovanadophosphoric heteropoly acids and their catalytic activities
      
The catalytic activities were efficiently influenced by the preparation conditions.
      
The specific activities experiment further confirmed that strict anaerobes were not affected over the presence of micro aeration environment.
      
The calci-mircobialite is a special carbonate buildup, which is formed due to the activities of different kinds of microbes.
      
The potential relationship between extremophile activities and hydrocarbon resources in marine extreme environments are then discussed in details.
      
On the one hand, the large-scale magma activities in Cretaceous caused the concentration of CO2, the release of the inner energy of the earth, superficial change in the ocean-land, and finally, the increase of atmospheric temperature.
      
The anoxic and oxic conditions in the Cretaceous ocean were caused by volcanic activities, but they stemmed from different causative mechanisms.
      
The research activities were focused on HPPA physics and technology, reactor physics of external source driven sub-critical assembly, nuclear data base and material study.
      
Our society is more and more conscious of this necessity, which involves increasing activities of restoration, and then sometimes also of repair, mechanical strengthening and seismic retrofitting.
      
The priority analysis using the geographical information system (GIS) tool has revealed that castern provinces should be of high priority in the future reduction activities of dioxins release in China.
      
The results show that the catalysts have high catalytic activities even at a low temperature (80°C) and low oxygen partial pressure (0.5 MPa) in a batch reactor.
      
A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities
      
The objective of this study was to prepare a new photocatalyst with high activities for degradation of organic pollutants.
      
It proved that plants clearly increase TN removal rates by improving the water flow, and increasing the biomass, as well as activities of microorganisms around the roots.
      
 

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