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Copyright of International Journal of Organizations / Revista Internacional de Organizaciones (RIO) is the property of Analisi Social i Organitzativa grup de recerca and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

• High school teachers associate the languages of immigrant students with misbehavior. • Immigrant students' heritage languages get banned at Catalan high schools. • Discourse on integration in Catalan schools shows pressure towards assimilation. • Public displays of the heritage language make immigrant students appear "unintegrated". This study explores high-school teachers' discourse on heritage language use regarding their students of immigrant background in Catalonia, Spain, where both Catalan and Spanish are official languages. For this purpose, 10 high-school teachers from 5 schools with a high ratio of foreign students were interviewed. These interviews were analysed using membership categorization analysis. The results show that the perceived appropriateness of heritage language use depends on whether the students are integrated enough in the eyes of locals. Additionally, heritage language use in public is judged from the perspective of a Catalan listener and is deemed disrespectful. This is particularly salient in students of Moroccan background, where language maintenance is associated with overly strict adherence to Islam. The need for training teachers on how to properly address the linguistic and cultural diversity of their classrooms is discussed. [ABSTRACT FROM AUTHOR]

This work summarizes the results of a ten year surveillance programme on PCDD/F in ambient air carried out in Catalonia (Spain). The study has been conducted by the Dioxin Laboratory of Spanish Council for Scientific Research (CSIC) in collaboration with the Environment Department of the Catalonian Government. 175 samples have been collected throughout Catalonia from 1994 to 2004. Different sampling locations classified as industrial, traffic, urban, suburban and rural sites have been monitored in order to find the most contaminated zones as well as the ones with expected background concentrations. The highest concentrations found in this study were determined at the industrial locations. Concentrations ranging from 5 to 1196fg I-TEQ/m3, with a mean value of 140fg I-TEQ/m3 and from 10 to 357fg I-TEQ/m3, with a mean value of 72fg I-TEQ/m3 were determined in industrial and traffic sampling points, respectively. In contrast, the lowest concentrations were found in rural stations, ranging from 5 to 45fg I-TEQ/m3, with a mean value of 28fg I-TEQ/m3. The PCDD/F concentration trend in Catalonian ambient air shown a clear drop of the median values occurred during the study sampling period. A decline of about 70% was observed from 1997–1998 to 2003–2004. [Copyright &y& Elsevier]