Download or read book PERVAPORATION ET CONDENSATION ETAGEE APPLICATION A L EXTRACTION DE COMPOSES D AROME written by ARNAUD.. BAUDOT and published by . This book was released on 1997 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DU PRESENT TRAVAIL EST L'ETUDE DE L'INFLUENCE DES PARAMETRES OPERATOIRES DANS LE CIRCUIT DE PERMEAT SUR LA RECUPERATION DU PERMEAT LORS DE LA PERVAPORATION DE COMPOSES D'AROME. LES MECANISMES ELEMENTAIRES QUI CONDITIONNENT LE TRANSPORT DU PERMEAT DEPUIS LA FACE AMONT DE LA MEMBRANE JUSQU'A L'ETAPE DE CONDENSATION ONT D'ABORD ETE IDENTIFIES. IL AINSI ETE MONTRE QUE LA PRESENCE DE GAZ INERTES DANS LE CIRCUIT DE PERMEAT POUVAIT CONDUIRE A L'ENTRAINEMENT D'UNE FRACTION SIGNIFICATIVE DU PERMEAT HORS DU CONDENSEUR. DIFFERENTS MEMBRANES ORGANOPHILES COMMERCIALES ONT ENSUITE ETE CARACTERISEES AU CONTACT DE MELANGES MODELES AQUEUX CONTENANT DES COMPOSES D'AROME PRESENTANT UN LARGE EVENTAIL DE POLARITES ET DE VOLATILITES. L'AFFINITE DES MEMBRANES POUR LES COMPOSES TESTES A ETE DECRITE GRACE AU CALCUL DE COEFFICIENTS DE TRANSFERT TRANSMEMBRANAIRE. IL A ETE MONTRE QUE LE PHENOMENE DE SORPTION-DIFFUSION CONSTITUAIT LE MECANISME LIMITANT DE TRANSFERT A TRAVERS LA MEMBRANE POUR LES COMPOSES ORGANIQUES TRES VOLATILES EN SOLUTION AQUEUSE. A L'OPPOSE, L'ETAPE DE DESORPTION EN FACE AVAL DE LA MEMBRANE CONSTITUE LA RESISTANCE MAJEURE AUX COMPOSES ORGANIQUES DE MASSE MOLECULAIRE ELEVEE (-DECALACTONE). LES MEMBRANES COMMERCIALES SE SONT REVELEES REELLEMENT EFFICACES POUR L'EXTRACTION DES COMPOSES HYDROPHOBES, TELS QUE LES COMPOSES SOUFRES. ENFIN, CHERCHANT A AMELIORER LA SELECTIVITE GLOBALE DE L'OPERATION DE PERVAPORATION, LE COUPLAGE PERVAPORATION + CONDENSATION BIETAGEE A ETE ETUDIEE SUR DES MELANGES BINAIRES ET TERNAIRES. DANS LE CAS D'UN MELANGE D'ALIMENTATION CONTENANT DES COMPOSES ORGANIQUES HYDROPHOBES DILUES OU HYDROPHILES CONCENTRES, LE FRACTIONNEMENT EST REGI UNIQUEMENT PAR L'EQUILIBRE LIQUIDE-VAPEUR DANS LE PREMIER CONDENSEUR. DANS CERTAINS CAS, L'ENTRAINEMENT PAR LE GAZ INERTES PEUT EGALEMENT CONDUIRE A UN FRACTIONNEMENT SELECTIF DU PERMEAT ENTRE LES DEUX CONDENSEURS.

Download or read book Bound Lives written by Rachel Sarah O'Toole and published by University of Pittsburgh Pre. This book was released on 2012-04-15 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bound Lives chronicles the lived experience of race relations in northern coastal Peru during the colonial era. Rachel Sarah O'Toole examines how Andeans and Africans negotiated and employed casta, and in doing so, constructed these racial categories. Royal and viceregal authorities separated "Indians" from "blacks" by defining each to specific labor demands. Casta categories did the work of race, yet, not all casta categories did the same type of work since Andeans, Africans, and their descendants were bound by their locations within colonialism and slavery. The secular colonial legal system clearly favored indigenous populations. Andeans were afforded greater protections as "threatened" native vassals. Despite this, in the 1640s during the rise of sugar production, Andeans were driven from their assigned colonial towns and communal property by a land privatization program. Andeans did not disappear, however; they worked as artisans, muleteers, and laborers for hire. By the late seventeenth and early eighteenth centuries, Andeans employed their legal status as Indians to defend their prerogatives to political representation that included the policing of Africans. As rural slaves, Africans often found themselves outside the bounds of secular law and subject to the judgments of local slaveholding authorities. Africans therefore developed a rhetoric of valuation within the market and claimed new kinships to protect themselves in disputes with their captors and in slave-trading negotiations. Africans countered slaveholders' claims on their time, overt supervision of their labor, and control of their rest moments by invoking customary practices. Bound Lives offers an entirely new perspective on racial identities in colonial Peru. It highlights the tenuous interactions of colonial authorities, indigenous communities, and enslaved populations and shows how the interplay between colonial law and daily practice shaped the nature of colonialism and slavery.

Download or read book Civil Censorship written by United States. Department of the Army and published by . This book was released on 1981 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Armed Forces Censorship written by United States. Department of the Army and published by . This book was released on 1964 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Conscious Self Conscious written by HASEFANW and published by . This book was released on 2021-03-30 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a compilation of poems composed by me over the years. Poems aren't always flow-ey. Sometimes they're a real story with real people behind them. Clear your mind, come naked, and dive deep into the ambiance of me.