نتایج جستجو برای: liquid environment

تعداد نتایج: 728725  

Journal: :Transactions of the Japan Society of Mechanical Engineers 1974

Journal: :Journal of the Korean Society of Tribologists and Lubrication Engineers 2013

Journal: :Physical chemistry chemical physics : PCCP 2014
Sandra Flessau Christopher Wolter Elmar Pöselt Elvira Kröger Alf Mews Tobias Kipp

The optical properties of single colloidal semiconductor nanoparticles (NPs) are considerably influenced by the direct environment of the NPs. Here, the influence of different liquid and solid glycol matrices on CdSe-based NPs is investigated. Since the fluorescence of individual NPs varies from one NP to another, it is highly desirable to study the very same individual NPs in different matrice...

Journal: :Analytical chemistry 2002
Gerd Hamscher Silke Sczesny Heinrich Höper Heinz Nau

Little is known about the occurrence and the fate of veterinary drugs in the environment. Therefore, a liquid chromatography/tandem mass spectrometry method was developed and employed to investigate in detail the distribution and persistence of the frequently used tetracyclines and tylosin in a field fertilized with liquid manure on April 2000 and April 2001; soil sampling was performed in May ...

Journal: :nutrition and food sciences research 0
hossein habibi national nutrition and food technology research institute, shahid beheshti university of medical sciences, tehran, iran abdorreza mohammadi national nutrition and food technology research institute, shahid beheshti university of medical sciences, tehran, iran marzieh kamankesh department of chemistry, faculty of science, iran university of science and technology, tehran, iran

background and objectives: furfural (f) and hydroxymethyl furfural (hmf) are cyclic aldehydes, which are formed during the heat processing of foods. these chemical contaminants have received much attention due to their suspected health hazards and heat damage indicators. the aim of the present study was extraction and determination of f and hmf in baby-foods using dispersive liquid-liquid micro...

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