Drugs of abuse (DOA) screening in urine is usually performed by immunoassay. However, the number of validated immunoassays is limited, being largely restricted to well-known substances. The catalogue of misused drugs is continually in flux as new DOA are continually being developed [1], [2]. ...
false- egative occult blood i stool. It has alwa s bee sta dard that a positive dipstick for blood i the abse ce of RBCs b micro- scop is i dicative of m oglobi - uria or hemoglobi uria, ot true hematuria. The authors prese t a table list- ...
[1]. These anions have been often associated with cancer, especially nitrite, either from direct ingestion or the nitrate reduction by bacteria in the digestive system [2,3]. When nitrite reaches the acidic environment of the stomach, and is combined with amine or amide, it may form toxic ...
Herein, a procedure without any organic solvents and catalysts (acidic or alkaline) is developed for the synthesis of silica-encapsulated glucose-oxidase-coated magnetic nanoparticles by a facile self-assembly route, avoiding damage of the enzyme structure in the reaction system. The encapsulated ...
Pteridines are a group of compounds synthesised by many living organisms that are involved in the metabolism of many cofactors and vitamins. Their concentration in biological fluids may be altered by various pathologies such as cancer or inflammatory bowel disease, urine being the main route of excre...