3 research outputs found

    TvÄ lÀromedelsanalyser med fokus pÄ nyanlÀnda elever

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    I takt med att svenska samhÀllet blir alltmer mÄngkulturellt och flersprÄkigt kommer framtidens lÀrare stÀllas inför nya utmaningar dÄ mÄnga av deras elever inte har svenska som modersmÄl. DÄ Àr det viktigt att man har en fördjupad förstÄelse om hur lÀromedel i svenska skolor kan bemöta dessa elever. I denna studie, har tvÄ lÀromedelsanalyser utförts utifrÄn ett historiskt perspektiv. Syftet med denna uppsats Àr att undersöka hur sprÄket, texten och innehÄllet i lÀromedel för f-3 har förÀndrats under 40 Är samt att undersöka om lÀromedlens text Àr anpassad att anvÀnda för andrasprÄkselever. Studien utgÄr frÄn den sociokulturella teorin och har genomförts med hjÀlp av en kvalitativ metod som utgÄr frÄn textanalys och innehÄllsanalys .Resultatet av studien visar att det Àldre lÀromedlet knappast Àr lÀmpligt för nyanlÀnda elever i frÄga om sprÄk, text och innehÄll. Det nyare lÀromedlet Àr bÀttre anpassad men inte heller den motsvarar helt de behov som nyanlÀnda andrasprÄkselever har

    Volatile Compounds from Six Varieties of Ficus carica from Tunisia

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    Aroma is one of the essential parameters for the evaluation of fruit quality and consumer acceptance, with volatile components being determinant for this characteristic. During this work, the volatile profile of fresh fruits (pulp and peel) and leaves of Tunisian Ficus carica L. white (‘‘Bither Abiadh”, ‘‘Bidi”) and dark (‘‘Bither Kholi”, ‘‘Himri”, ‘‘Kholi” and ‘‘Tchich Asal”) varieties were characterised by GC and GC-MS. The major components detected among the volatiles of leaves were cedrol (38.9%), manoyl oxide (24.8%), α-terpineol acetate (21.7%), abietatriene (11.8%), Îł-muurolene (7.4%), α-pinene (6.1%), pentadecanal (5.2%) and nonadecanal (2.3%). The major components detected in the volatiles of the fruits were cedrol (43.8%), α-terpinyl acetate (22.5%), manoyl oxide (12.9%), α-pinene (9.3%), abietadiene (8.1%),trans-calamenene (3.9%) and n-heneicosane (3.5%).The results suggest that the varieties could be distinguished on the basis of their volatile fractions composition

    Streptomyces flavogriseus HS1: Isolation and Characterization of Extracellular Proteases and Their Compatibility with Laundry Detergents

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    The present study describes the isolation of a new protease producing Streptomyces strain HS1 and the biochemical characterization of the secreted proteases. By sequencing of its noted 16S rDNA, HS1 strain was found to have a 100% identity with Streptomyces flavogriseus. The highest protease production was found using FermII media. In these conditions maximum protease production (99 U/mL) was obtained after 96 h incubation at 30°C and 150 rpm. HS1 strain produced at least five proteases as revealed by zymogram technique. The enzyme preparation exhibited activity over a broad range of pH (5–11) and temperature (25–70°C). Optimum activity was observed at a pH of 7.0 and a temperature of 50°C. Proteolytic activity was significantly unaffected by Ca2+ and Mg2+. EDTA and PMSF highly decreased the original activity. The crude extracellular proteases showed high stability when used as a detergent additive. These properties offer an interesting potential for enzymatic hydrolysis at the industrial level
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