نتایج جستجو برای: spectrophotometry 1
تعداد نتایج: 2758999 فیلتر نتایج به سال:
Recent studies have indicated that progesterone (PROG) reduces the expression of inflammatory factors in brain tissue. The present study was designed to investigate whether PROG inhibits the inflammatory response and the infiltration of inflammatory cells in the brain. One hundred and seventy-six adult male Sprague-Dawley rats were randomly divided into four groups: a sham-operated (control) gr...
the traditional measurement methods of 3 kinds of aluminum species and the total aluminum content in polyaluminum solutions are al-ferron timed complex spectrophotometry and edta chelatometry respectively. but eachof these methods has different deficiencies. in this paper, microwave digesting technical had be coupled with the radiate ferron spectrophotometry to rapid mensurate the concentration...
OBJECTIVE The objective of this study was to develop a reproducible method of establishing the concentration of yeast cells per milliliter of solution. METHODS Three methods of determining the number of yeast cells in solution were compared: Neubauer's counting chamber, spectrophotometry, and nephelometry. RESULTS All three methods were comparable and reproducible. The following formulas we...
Objectives/Goals The goals of this project were to determine a) whether Copper-induced oxidation of Bilirubin leads to the bluish black pigment noted in Pigmented Gallstones in patients with hemolysis, b) the structures of the species involved, and c) what other metals participate in the formation of the stones. Methods/Materials Materials: Bilirubin (BR), Copper, Zinc and Calcium salts, Potass...
Abstract A simple analytical method, cheap and biologically friendly, to find Ni (II) in drinking water was developed by dithizone immobilization chloride polyvinyl matrix (PVC) dioctyl phthalate as plasticizers. Nickel is a toxic dangerous metal for humans the environment. The step experimented with making membrane sensor next characterization of UV-Vis spectrophotometry, atomic absorption spe...
Articles about the development of derivative spectrophotometric methods and analytical applications of derivative spectrophotometry (DS) published in the last nine years (since 1994) are reviewed.
We evaluated the results of two surveys of neonatal bilirubin determinations in 66 Slovakian clinical chemistry laboratories. Identical control samples prepared as described by Vink (Clin. Chem. 33 (1987) 1817-1821) and commercially available control serum were used for both surveys. These control samples were analysed in the participating laboratories using various modifications of diazo techn...
Subarachnoid haemorrhage (SAH) has a high mortality and morbidity rate. Early SAH diagnosis allows the early treatment of a ruptured cerebral aneurysm, which improves the prognosis. Diagnostic cerebrospinal fluid (CSF) analyses may be performed after a negative computed tomography scan, but the precise analytical methods to be used have been debated. Here, we summarize the scientific evidence f...
Spectrofluorimetric and Spectrophotometric Determination of Pregabalin in Capsules and Urine Samples
Three new, simple, sensitive and selective spectrofluorimetric and spectrophotometric methods were developed for the determination of the γ-amino-n-butyric acid derivative, pregabalin. Pregabalin as a primary amine reacts with fluorescamine to yield a fluorescent product (Method I), with 2,4-dinitrofluorobenzene (Method II) and 2,3,5,6-tetrachloro-1,4-benzoquinone (Method III) in aqueous alkali...
Theoretical aspects, instrumental devices and analytical applications of derivative ultraviolet-visible region absorption spectrophotometry are reviewed.
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