Quantitative Paper Chromatography of Aliphatic Aldehydes by Hydroxamic Acid Method

DEVELOPMENT OF A METHOD FOR THE DETERMINATION OF 4-HYDROXY-3-METHOXYMANDELIC ACID (VANILLYLMANDELIC ACID) IN URINE BY PAPER CHROMATOGRAPHY

We have developed a simple and precise paper chromatographic method for the determination of 4-hydroxy-3-methoxymandelic acid (VMA) in urine. Concentrations of VMA in patients with neuroblastoma were increased in comparison to controls. The linearity was excellent in the concentration range tested. The within-assay coefficient of variation for control and patient urine was less than 2.2%. ...

Study of phenylketonuria by paper chromatography

QSPR Modeling of Heat Capacity, Thermal Energy and Entropy of Aliphatic Aldehydes by using Topological Indices and MLR Method

Aliphatic Aldehydes Produced by Heating Chinese Cooking

The Chinese style of cuisine requires steaming, boiling, or using oil to pan fry or deep fry. If the cuisine is prepared by stir-fry, the cooking oil in the fry pan is ordinarily heated in advance to approximately 300°C. A variety of chemical reactions occur while the temperature of the cooking oil in the pan is being elevated and the cooking materials are finally loaded into the hot pan. Chemi...

Removal of Cysteine (an Aliphatic Amino Acid) by Natural Clinoptilolite

Amino acids have been extensively used in several processes of the pharmaceutical and food industries. Treatments for the recovery and reuse of the wastewaters generated from these processes are few and little known. This work aims at studying the influence of different variables on the sorption of L-cysteine, contained in aqueous solutions, on clinoptilolite mineral. L-Cysteine (Cys) was s...