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Determining the relative age of blue ballpoint ink by gas chromatography
      
A method for identifying the writing age of blue ballpoint pen ink has been established due to the imperative demand in forensic laboratories.
      
The content of the volatile components in blue ballpoint pen ink were determined by gas chromatography (GC).
      
Different kinds of blue ballpoint pen ink were detected and the repeatability of the experiment was investigated.
      
With increasing the length of the alkyl side chain, the UV and fluorescence spectra exhibit an obvious blue shift compared with those of the unsubstituted polymer.
      
The samples were characterized by XRD, BET, DTA-TG, UV-Vis, and their photocatalytic properties were evaluated with two model pollutants, methylene blue (MB) and rhodamine B (RB), at room temperature.
      
Obvious blue shift appeared in the UV-Vis absorption spectra.
      
Compared with crystal materials, the excitation and emission spectra of Bi4Si3O12 nanopowders indicated a blue shift.
      
Electrochemical behavior of hydrogen peroxide sensor based on new methylene blue as mediator
      
A novel amperometric hydrogen peroxide sensor was proposed by co-immobilizing new methylene blue (NMB) and Horseradish peroxidase (HRP) on glassy carbon electrode through covalent binding.
      
Photocatalytic degradation of methylene blue on Fe3+-doped TiO2 nanoparticles under visible light irradiation
      
The photocatalytic degradation of methylene blue was used as a model reaction to evaluate the photocatalytic activity of Fe3+/TiO2 nanoparticles under visible light irradiation.
      
It was reported that carbon nanotube (CNT) was functionalized with the electroactive Nile blue (NB), which is a phenoxazine dye, by a method of adsorption to form a NB-CNT nanocomposite.
      
The blue shift of maximum absorption in UV-vis displayed the effect of quantum size.
      
Feeding habitats of blue sheep (Pseudois nayaur) during winter and spring in Helan Mountains, China
      
The feeding habitat selection of blue sheep (Pseudois nayaur) was studied by direct observation method in the Helan Mountains, China during winter (from November to December) and spring (from April to June) from 2003 to 2004.
      
We established 25 line transects to collect information on feeding habitats used by blue sheep.
      
Such habitats characterized by 12 ecological factors were preferred as feeding areas by blue sheep during winter.
      
Similar to habitat selection by the species during winter, blue sheep also showed a preference for mountain savanna with tree dominated by Ulmus glaucescens and medium tree density (>amp;lt; 4 individuals / 400 m2) during spring.
      
The spots of proteins were visualized by staining with Coomassie Brilliant Blue.
      
 

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