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precipitation
The water-soluble glucan was obtained from Pleurotus florida fruit bodies by hot water extraction, ethanol precipitation, DEAE cellulose dialysis and Sephadex G-75 gel filtration.
      
Preparation and characterization of nanocrystalline ZnO by direct precipitation method
      
Nanocrystalline ZnO was prepared with ZnCl2·2H2O and (NH4)2CO3 as raw materials by direct precipitation method.
      
The ion-exchanger LiAlTiO4 of spinel type was prepared by the common precipitation/hydrothermal crystallization method, and was acid-modified.
      
The precursors of Fe2O3-SiO2 mixed oxides prepared through co-precipitation method were modified by microwave hydrothermal treatment for the first time.
      
Compared with the MgO sample prepared by the precipitation method, MgO prepared by solid-state chemical reaction has uniform pore size distribution, surface area, and crystal size.
      
Fe3O4 magnetic nano-particles were prepared by a co-precipitation method and were modified using oleic acid.
      
Kinetics of thermal decomposition of CeO2 nanocrystalline precursor prepared by precipitation method
      
The thermal decomposition of CeO2 nanocrystalline precursor prepared by chemical precipitation method was investigated using thermo-gravimetric/differential scanning calorimetry (TG/DSC) and X-ray powder diffraction (XRD).
      
A nano-alumina with high specific area was prepared using a homogeneous precipitation method with titanium dioxide and barium oxide as modifying additives.
      
The procedure consists of formulating a set of recommendations regarding the choice of parameter values for electrostatic precipitation.
      
The concentrations of N in the litterfall, precipitation, throughfall, litter layer, and soil were 0.74%-2.30%, 0.000,038%, 0.000,09%, 1.94%, and 0.59%, respectively.
      
Annual input of N through incident precipitation was 4.88 kg/hm2.
      
Effects of forest on precipitation chemistry and total suspended particles of stem-flow in Jiufeng National Forest Park, Beijing
      
Precipitation chemistry was monitored in two different types of forests (mixed Pinus tabulaeformis and Quercus variabilis forest and pure Q.
      
tabulaeformis in the mixed forest was 1.00 mS/cm, which was 5.88 times as high as that of precipitation outside the forest.
      
variabilis in pure and mixed forests show little difference, 0.34 and 0.30 mS/cm, respectively and were 2.00 and 1.76 times higher than that of precipitation.
      
tabulaeformis decreased over time and with an increase in the amount of precipitation.
      
The mean TSP of stem-flow in mixed forest was 116.95 mg/L, but 87.14 mg/L in the pure forest, which were 72.93 and 43.12 mg/L higher than that of precipitation.
      
The model took into account the major processes that address the relationships of plants and the environment, including soil characteristics, precipitation, infiltration, vegetation transpiration, and soil evaporation.
      
 

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