\n\nMethods: Consecutive patients with symptoms of rhinitis and with positive skin test to pollens only were
interviewed for the duration of symptoms, correlation with sensitization pattern, and presence of reactivity to nonspecific stimuli. All underwent rhinoscopy and nasal scraping for cytology.\n\nResults: Five hundred nineteen patients with AR were studied. Of these 519 patients selleck 60 (11.5%) had an atypical or mixed form of rhinitis, with symptoms independent of the exposure and also elicited by nonspecific stimuli. These patients clearly differed from typical forms, especially for the nasal inflammation. They had a greater number of eosinophils and mast cells out Of season (p < 0.05). Moreover, these atypical forms had, more frequently, asthma and eosinophilic polyps.\n\nConclusion: In similar to 12% of patients with AR, other mechanisms of inflammation seem to intervene. Nasal cytology can be helpful in discriminating these atypical forms. (Am J Rhinol Allergy 23, 312-315, 2009; doi: 10.2500/ajra.2009.23.3320)”
“The aim of
this work was to study seasonal variation of histopathological and histochemical markers in blue mussels NVP-HSP990 ic50 (Mytilus edulis L) exposed to pyrogenic PAH contaminants. Mussels were collected in January, June, September and October from a sampling site in the vicinity of the discharge from an aluminium smelter and from a clean reference site. Histopathological analysis was carried out on the digestive gland (DG) and the gonads, lipofuscin and neutral lipids were analysed in the DG. Clear responses in lipofuscin and neutral lipids were detected in the DG of mussels collected from the polluted site at some sampling Selleck Vorinostat times. Moreover, these mussels presented atrophy in digestive tubules and haemocytic aggregates in the gonad and DG. However, in all parameters studied, the magnitude of the response showed clear seasonal variation. (C) 2011 Elsevier Ltd. All rights reserved.”
“The relationship between turbidity and phosphorus (P) removal in the water
of the Qingcaosha reservoir was studied in the field. The reservoir is located on the Yangtze River estuary in China. The characteristics of P fractions and P sorption-release in Qingcaosha reservoir sediment were investigated in the laboratory. The field results showed that the settlement of suspended matter due to turbidity could lead to the deposition of the P in water onto the sediment surface. The laboratory results indicated that the total phosphorus (TP) content in the sediment varied from 550.33 to 844.48 mg/kg. In addition, the calcium (Ca) bound P (HCl-P) fraction had the highest proportion of TP, followed by organic phosphorus (OP) and phosphorus bound to aluminum (Al), iron (Fe), and manganese (Mn) oxides and oxyhydroxides (NaOH-P) in reservoir sediment. The sorption capacity of sediment ranged from 9.78 to 39.84 mg/kg.