منابع مشابه
Analysis of urinary pterins in autism.
The pterins, neopterin and biopterin, occur normally in body lluids including urine. It has been known for some time that increased production and release of neopterin and 7,sdihydroneopterin accompanies immune activation of macrophages both in vilro and in vivo [ 1.21. Interferon gamma and tuniour necrosis factor alpha are the key cytokines which lead to this increase in neopterin levels [2] b...
متن کاملIn situ detection of pterins by SERS.
Surface enhanced Raman scattering (SERS) has been used to detect specific pterin molecules at sub-nanomolar concentrations. SERS is fast becoming a widely used technique for the sensitive and specific detection of multiple analytes. The information-rich and concentration-dependent spectra obtained from SERS make the technique ideally placed for high speed, low cost analysis of almost any analyt...
متن کاملHydroxylysine glycosides in human urine.
Hyd roxylysyl-galactosyl-glucose (HGG) and hyd roxylysyl-galactose (HG) were isolated from normal human urine and shown to be identical with hydroxylysine glycosides (OHLG’s) whose structure had been elucidated in other laboratories. We devised a procedure for separating the OHLG’s from many other urinary constituents by preliminary fractionation on a column of Sephadex. The OHLG’s in the fract...
متن کاملAcid in Human Determination Urine
An ion pair reversed phase HPLC method for the determination of clavulanic acid has been developed. Since clavulanic acid had poor absorption O,mas 201 nm in water) in a UVregion suitable for HPLC detection, the detectability was enhanced by bathochromic shift of )maa due to solvent effect. The shifts of 2ma.., were measured with the solutions containing clavulanic acid, tetrabutylammonium brom...
متن کاملExtraction and Determination of Cyproheptadine in Human Urine by DLLME-HPLC Method
Novel dispersive liquid-liquid microextraction (DLLME), coupled with high performance liquid chromatography with photodiode array detection (HPLC-DAD) has been applied for the extraction and determination of cyproheptadine (CPH), an antihistamine, in human urine samples. In this method, 0.6 mL of acetonitrile (disperser solvent) containing 30 µL of carbon tetrachloride (extraction solvent) was ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1972
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)45022-9