A Solution for Testing the Cleaness of Blood Pipettes

Calcitonin-mediated changes in plasma tryptophan and brain 5-hydroxytryptamine and acetylcholinesterase activity in rats

“…Total plasma calcium was determined with a Unicam SP.90 atomic absorption spectrophotometer according to the manufacturer's instruction manual. Tryptophan concentration in the protein-free plasma fraction was determined by the norharman fluorescence method of Denkla & Dewey (1967) as modified by Lehmann (1971) and Bloxam & Warren (1974). The concentration of 5-hydroxytryptamine in the brain was measured by the procedure described by Curzon & Green (1970).…”

Brain serotonin synthesis: reduction in corn‐malnourished rats1

“…Tryptophan was estimated by the method of DENCKLA & DEWEY (1967), as modified by LEHMANN (1971) and BLOXAM & WARREN (1974). 5-Hydroxytryptophan, 5-HT, and 5-HIAA were assayed from column eluates by the 0-phthalaldehyde method of MAICKEL & MILLER (1966).…”

Direct detection of tryptophan for rapid diagnosis of cancer cell metastasis competence by an ultra-sensitive and highly selective electrochemical biosensor

“…11 In the last two decades, some analytical methods have been developed for the determination of Trp. [12][13][14][15][16] Because the majority of these methods are mostly based on high performance liquid chromatography (HPLC), uorometry, capillary electrophoresis (CE) and chemiluminescence techniques and are associated with some drawbacks, such as laborious, time consuming and costly procedures, [17][18][19][20][21][22][23][24] the development of fast, selective and cost-effective tools such as sensors/biosensors appears to be more in favor of basic and clinical studies. Biosensors represent simplicity, low expense, and possibility of miniaturization.…”