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authentic samples
The proposed methods allow semimicro and microlevel determination of SBS in authentic samples and in dosage forms.
      
They were identified by GC-MS and proton NMR spectroscopy by comparison with authentic samples.
      
Breakthrough volume was determined on authentic samples and was about 40-60 L, using a flow rate of 1 L·min-1.
      
Violaxanthin, neoxanthin, aesculaxanthin, lutein, β-carotene, β-cryptoxanthin β-citraurin and theircis-isomers could be detected with a diodearray detector utilising authentic samples.
      
In total, 23 carotenoids have been identified or tentatively identified, based on their UV-Vis spectra and co-chromatography with authentic samples.
      
The newly formed anhydrolutein I (3) and II (4) were detected and identified by HPLC-DAD and HPLC-MS techniques and co-chromatography with authentic samples.
      
A series of authentic samples from the fall regions of the burned out first stages of UDMH fueled rockets has been analyzed disclosing MT concentrations in the range of 0.020 to 100?mg kg-1.
      
From MeOH extracts of this plant two steroidal glycosides, marsdekoiside A and B, were isolated, and their structures were elucidated on the basis of spectral evidence and by comparison of the hydrolysis products with the authentic samples.
      
monophylla oil by GC, GC-MS and coinjection with authentic samples.
      
All separated fractions obtained from the Sephadex column have been confirmed by means of paper chromatography and identified by the use of authentic samples.
      
Detection and identification of the fragments is performed by thin-layer chromatography and by comparison with authentic samples under the application of a radio-scanner.
      
Various authentic samples (fuels, rocks, soils, ores, intermediate products, waste materials, environmental materials) were examined for their thallium content.
      
A Spectrophotometric method for the determination of indium has been worked out and applied to synthetic and authentic samples with satisfactory results.
      
For authentic samples, a mean difference of +0.1‰ (range +1.1 to -0.9‰) was found; more negative differences indicate the addition of C4 plant sugars.
      
The comparison of the [2H]/H ratios of unknown samples with values obtained from authentic samples allows conclusions to be drawn, in terms of the origin of the sugar in the must before fermentation.
      
The selectivity was confirmed using mixtures of authentic samples of the bone and liver isoenzymes.
      
On day zero and at intervals over a 6 months period, there was no significant loss of THP at the storage temperatures -20°?C and 4°?C in the spiked and authentic samples.
      
The properties of the water-soluble metabolites of [3H]gibberellin A1 ([3H]GA1) from lettuce (Lactuca sativa L.) hypocotyls were compared with those of authentic samples of gibberellin (GA) glucosyl esters and ethers.
      
The results from the HR-MAS NMR analysis were confirmed with high-resolution NMR spectroscopy, high-resolution fast atom bombardment mass spectrometry (FABMS) and GC-MS, on material isolated from the studied alga, but also on authentic samples.
      
Alkyl sterols epimeric at C-24 isolated from the Atlantic scallop,Placopecten magellanicus, were analyzed by high resolution (220 MHz) nuclear magnetic resonance spectrometry, and their spectra compared with authentic samples.
      
 

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