BACKGROUND Carcinogenic aromatic amines derived from hair dyes have recently received new attention. One of these is ortho (o)-toluidine, which is classified as carcinogenic to humans. OBJECTIVES To clarify exposure of hairdressers to potentially carcinogenic aromatic amines, including o-toluidine. METHODS We measured eight potentially carcinogenic aromatic amines in the blood of 295 hairdr...

A LDOHEXOSES REACT WITH o-toluidine in the presence of glacial acetic acid to produce a green color, which follows Beer’s law over a wide range of concentrations. This reaction is relatively selective for glucose. An improvement in manual procedures involving this reaction (1, 2) was reported by Feteris (3), who determined glucose directly on serum without deproteiization. She also improved the...

Although Giemsa staining has been routinely used for the detection of trophozoites and intracystic bodies in smears of bronchoalveolar lavage fluid (BAL) from patients with Pneumocystis cariniipneumonia, it does not normally stain the cyst wall. For detection ofthe cysts other stains such as toluidine Blue 'O' and methenamine silver must be used as well. Sulphation of smears before staining wit...

A simple and convenient procedure was u sed for studying plant m erist ematic tissues. Tissues were fixed in 4% glutaraldehyde, dehydrated in a t ertiary butyl alcohol series and embedded in SPURR's m edium. Sectioning may be done with a glass knife in an inexpensively made holder fitted t o a rotary microtome. Sta ining with 0.5 % aqueous safranin or fast green was followed by counter st a ini...

Although Giemsa staining has been routinely used for the detection of trophozoites and intracystic bodies in smears of bronchoalveolar lavage fluid (BAL) from patients with Pneumocystis carinii pneumonia, it does not normally stain the cyst wall. For detection of the cysts other stains such as toluidine Blue 'O' and methenamine silver must be used as well. Sulphation of smears before staining w...

Background: Mast cells are involved in multiple biological events. The significance of mast cells in non-neoplastic and neoplastic lesions of the cervix has been studied with conflicting results. Its presence in a tumor has been described as evidence of host immunologic antitumor response, angiogenesis and tumor invasion. Aims/Objectives: To study mast cell density in various cervical lesions u...

Aniline and o-, m-, and /Moluidine, which are representative of aro matic amines in cigarette smoke, were identified and quantified in human urine. Smokers excreted 3.1 ±2.6 «¿g/24 h of aniline and 6.3 ±3.7 ¿ig/ 24 h of o-toluidine (n = 16). Nonsmokers excreted 2.8 ±2.5 Mg/24 h of aniline and 4.1 ±3.2 un; 24 h of o-toluidine (n = 12). Metaand /»toluidine were detected in the urine of 2 ...