منابع مشابه
Spectrophotometric Analysis of Caffeine
The nature of caffeine reveals that it is a bitter white crystalline alkaloid. It is a common ingredient in a variety of drinks (soft and energy drinks) and is also used in combination with various medicines. In order to maintain the optimum level of caffeine, various spectrophotometric methods have been developed. The monitoring of caffeine is very important aspect because of its consumption i...
متن کاملSpectrophotometric cysteine analysis.
Procedures have been developed for estimating cystine content of proteins by reducing disulfide bonds with mercaptoethanol and selectively alkylating the generated sulfhydryl groups with 4-vinylpyridine or 2-vinylquinoline. 4-Vinylpyridine reacts with cysteine to produce S-,B-(4-pyridylethyl)cysteine (Pe-cysteine), which can be determined in protein hydrolysates either by ion-exchange chromatog...
متن کاملSpectrophotometric analysis of melanocytic naevi during pregnancy.
Malignant melanoma is the most common cancer during pregnancy, but it is unknown whether melanocytic naevi in general are activated. A total of 381 melanocytic naevi in 34 Caucasian primigravidae were examined using spectrophotometric intracutaneous analysis (SIAscopy) technology in early pregnancy and prior to delivery. The Siagraphs of each naevus were then compared in order to evaluate chang...
متن کاملSpectrophotometric analysis of cytochromes in Morris hepatomas.
levels of cytochrome c in mitochondria, giving a low a + as/c ratio, and (b) low contents of cytochromes ¿>5 and P-450 in microsomes. Analysis in whole homogenates of hepatomas showed more pronounced decrease of the amount of cytochrome a + a3, presumably due to the decrease of the number of mitochondria in hepatoma cells. The livers of the tumor-bearing rats are also characterized by the simi...
متن کاملSpectrophotometric determination of creatinine by monosegmented continuous-flow analysis
A monosegmented continuous-flow system (MCFS) has been evaluated for determination of creatinine in urine using the Jaffé reaction. The analyser is compact and allows 130 determinations to be performed per hour, with a relative standard deviation of the peak height better than 1.5% (N =10). The results for real samples agree with those obtained by. the standard manual Jaffé procedure and with t...
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ژورنال
عنوان ژورنال: Sen-ito Kogyo
سال: 1970
ISSN: 1884-2275
DOI: 10.2115/fiber1968.3.612