102,080 research outputs found
Supercritical fluid extraction as a potential mitigation strategy for the reduction of acrylamide level in coffee
No full textThe removal of acrylamide from coffee through supercritical CO2 extraction has been investigated for the first time. Two steps were performed: a pre-roasting treatment and a supercritical extraction process. The main aim of this first work was to investigate the feasibility of the process more than the impact of the treatment on the organoleptic properties of coffee. The efficiency of acrylamide removal was checked by measuring its content in the coffee beans before and after the supercritical treatment. The role of temperature, pressure, extraction time and the addition of a modifier (ethanol) was examined. The supercritical treatment did not affect the caffeine content of coffee and a maximum extraction efficiency of 79% was found for acrylamide. While a pressure variation did not significantly affect the results, temperature affected the extraction process at the highest extent. The addition of ethanol resulted in a significant increase in the extraction performance due to the change in polarity of the supercritical solvent mixture. The best working conditions in the experimental range here investigated were 100°C, 200 bar and 9.5% w/w ethanol
Industrial experimentation on hank-dyeing: modelling equipment and water economisation during rinsing
No full textOn comparing regression lines with unequal slopes
No full text Page R178: Gary O. Zerbe, Philip G. Archer, Natalio Banchero, and Andrew J. Lechner. “On comparing regression lines with unequal slopes.” Page R179: first column, the paragraph after Equation 7 should read Case II. If A < 0 and D > 0, then the tests will be significant for X's satisfying (See PDF) </jats:p
RADICAL PROSTATECTOMY: ONCOLOGIC RISK OF THE BLADDER NECK SPARING PROCEDURES F. Oneto, U. Repetto, A Curotto, M. Cussotto, R.. Franchini, R. Banchero, A. Simonato, G. Carmignani ABSTRACTS XXIITH EAU PARIGI, 1 -4 SETTEMRE 1996
No full textTrattamento percutaneo di urotelioma della pelvi renale con Laser a Tulio: descrizione di un caso clinico
No full textAn emulsification/internal setting technique for the preparation of coated and uncoated hybrid silica/alginate aerogel beads for controlled drug delivery
No full textCoated and uncoated hybrid silica/alginate aerogel beads have been prepared with a new emulsification/intemal setting technique. Hybrid aerogels combine high specific surface area and good mechanical strength of the inorganic component with biodegradability and bioadhesivity of the organic fraction so resulting in promising materials for drug-delivery. The hybrid beads were characterized through laser diffraction, BET and SAXS. Small particles (average diameter = 282 mu m) with high specific surface area (more. than 900 m(2)/g) and quite stable structural properties were obtained. Preliminary tests were performed to investigate how different kinds of coatings (alginate/hydroxypropyl methylcellulose, silica/hydroxypropyl methylcellulose or hydrophobic silica coating) affected the loading and release rate of model-drug ketoprofen. Among all results, uncoated hybrid aerogel beads resulted in burst release with 90% of the initial loaded drug delivered after 3 min while release was prolonged up to 60 min when a hydrophobic silica coating was used
Utilizzo della Duloxetina in pazienti con incontinenza urinaria secondaria a prostatectomia radicale retropubica
No full textConversion rate and mass transfer limitation in trickle bed reactors in the presence of a fast reaction
No full textMass transfer limitation is often the controlling mechanism of the conversion rate in trickle bed reactors, where catalysts with a huge activity are employed. Modelling and interpretation ofreactor performance would then require the knowledge ofthe proper mass transfer coefficients. Anyway, mass transfer coefficients that can be found in the literature are widespread and are obtained mostly for non-foaming and non-reacting systems. In this paper, we examined the catalytic hydrogenation of -methyl styrene to cumene (foaming and reacting system) in an isothermal laboratory reactor and in a pilot scale adiabatic one. The first aim ofthe work is to propose a scale-up criterion, as a useful tool to estimate performances of a pilot scale plant from those of a laboratory scale. Moreover, a model that considers the reaction as instantaneous is proposed; the aim ofthe model is to demonstrate how the systems where organic liquids are involved are improperly described with the mass transfer coefficients which can be found in the literature
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
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