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in soil
The solutions obtained are applied to new problems associated with the operation of a well in soil strata under complex geological conditions.
      
The extraction of chromium(VI) from aqueous saline solutions (NaNO3) using a trioctylamine solution in toluene was studied in order to determine chromium(VI) in soil samples by atomic absorption spectrometry.
      
Extraction and Gas-Chromatographic Determination of Phenol and Cresols in Soil
      
A procedure was developed for the gas-chromatographic determination of 0.05-50 mg/kg of phenol and o- and p-cresols in soil with an error of 10-25%.
      
The accuracy of the determination of elements by the proposed sorption-X-ray fluorescence method in river and sea water and in soil extract was verified by the added-found method.
      
On the basis of the results obtained, procedures for the determination of mercury in soil and semolina samples are developed with a detection limit of 60 pg and RSD = 10%.
      
The procedure was used for the determination of labile zinc species in soil.
      
Procedures were developed for the determination of trace isobutyl S-2-(N,N-diethylamino)ethyl methylphosphonothioate (IBDAEMP) in soil and construction materials by gas chromatography at a level of 1 × 10-9%.
      
The procedure was tested in determining sulfamethoxazole in soil and natural water.
      
The recovery of pesticides in soil was 80-132% for 2,4-D and 101-138% for 2,4,5-T.
      
Microwave extraction is more efficient than ultrasonic extraction for the determination of 2,4-D and 2,4,5-T in soil.
      
The detection limit in soil and the analytical range are 2 and 4-200 μg/g, respectively, for 2,4-D and 20 and 80-5000 μg/g, respectively, for 2,4,5-T.
      
Results of the determination of 2,4-D in soil by FPIA are in good agreement with the results of the determination by high-performance liquid chromatography.
      
A simple method for the determination of glyphosate residues in soil by capillary gas chromatography with nitrogen phosphorus
      
A simple method was developed to determine the residues of glyphosate, N-(phosphonomethyl)glycine, in soil.
      
It is shown that terrigenous apatite in soil, weathering crusts, and low peat bogs of humid zones is transformed into hydrogenous forms and solutions.
      
Fe and Mn contents in soil and loam of the drainage area are lower than the global clarke value, whereas Ca, K, and Na contents are much higher.
      
The actual number of microorganisms revealed in soil samples greatly differed from the theoretically predicted values.
      
The enumeration of microorganisms in soil microsamples by direct count and, especially, by the plating method with the use of conversion coefficients based on the degree of sample dilution gave erroneous results.
      
Microcosm experiments showed that the microbial biomass and the respiration activity in soil were regulated by nematodes.
      
 

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