نتایج جستجو برای: food samples
تعداد نتایج: 673603 فیلتر نتایج به سال:
TAYLOR, WELTON I. (Swift and Company, Chicago), AND JOHN H. SILLIKER. Isolation of salmonellae from food samples. IV. Comparison of methods of enrichment. Appl. Microbiol. 9:484-486. 1961. A comparison of various methods of enhancing frequency of Salmonella isolations revealed that inoculation of a second enrichment broth, with culture from the first, wi-as no improvement over the single direct...
in this study, a sensitive method of dispersive liquid phase microextraction based on ion-pair combined with the flame atomic absorption spectrometry was proposed for the determination of trace ni(ii) using aliquat 336-chloride as ion pair agent. several factors which have effect on the microextraction efficiency of ni(ii), such as ph, extraction and dispersive solvent type and their volume, c...
background: anecdotal information has suggested that sodium benzoate is used with more than permissible doses during production steps of food products especially pickles and pickled cucumbers in food producing factories in markazi province and other food producing factories . the present study was done to evaluate factual concentration of sodium benzoate in these products. methods: in this stud...
a new method for the separation and preconcentration of trace amounts of cadmium in food and water samples by magnetic solid phase extraction (mspe) with fe3o4 magnetic nanoparticles (fe3o4-mnps) and its determination by flame atomic absorption spectrometry has been developed. for this purpose, fe3o4-mnps were synthesized via chemical precipitation method. the extraction of cadmium ions from th...
Background and Objective: The purpose of this cross-sectional study is to evaluate the microbial contamination of food-handlers' hands and food contact surfaces in food preparation and distribution centers. Materials and Methods: This study was performed in 2019 in Fardis city of Alborz province. In this study, 100 samples of food contact surfaces and 48 samples of staff hands were collected f...
Background and Aims: The ready-to-eat foods, before and after preparation, usually kept in a refrigerator before consumption for a relatively long time, increase the risk of food poisoning. The aim of this study was to determine the effect of refrigeration in the fast-food shops on the microbial contamination of fast foods.Materials and Methods: A total of 100 samples, including 46 cooked beef ...
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