Search results for "egg"
showing 10 items of 881 documents
Stability of Asymmetric Lipid Bilayers Assessed by Molecular Dynamics Simulations
2009
The asymmetric insertion of amphiphiles into biological membranes compromises the balance between the inner and outer monolayers. As a result, area expansion of the receiving leaflet and curvature strain may lead to membrane permeation, shape changes, or membrane fusion events. We have conducted both atomistic and coarse-grained molecular dynamics simulations of dipalmitoyl-phosphatidylcholine (DPPC) bilayers to study the effect of an asymmetric distribution of lipids between the two monolayers on membrane stability. Highly asymmetric lipid bilayers were found to be surprisingly stable within the submicrosecond time span of the simulations. Even the limiting case of a monolayer immersed in …
Earthquake-resistant construction techniques in Italy between 1880 and 1910: alternatives to reinforced concrete
2017
The series of earthquakes that struck Italy between the late nineteenth century and the first decade of the twentieth century spurred a lively debate about earthquake-resistant buildings that, through the influence of foreign experience, resulted in specialised literature and competitions that gave rise to a series of interesting patents. Innovative construction solutions for seismic areas were largely developed after the earthquake that struck the cities of Messina and Reggio Calabria in 1908, alongside the parallel advances in reinforced concrete. New earthquake-resistant construction solutions were based on a reassessment of traditional construction methods that used bricks, timber or me…
Keggin heteropolyacid supported on BN and C3N4: Comparison between catalytic and photocatalytic alcohol dehydration
2020
The Keggin heteropolyacid (HPA), H3PW12O40 (PW12) has been supported on commercial boron nitride (BN) and two types of home prepared carbon nitride (C3N4). The supported PW12 was used in the gas-solid (photo)catalytic 2-propanol dehydration reaction to give propene at atmospheric pressure and temperatures in the range 70–120 °C and resulted more active than the pristine PW12. Reaction rate increased by increasing the temperature. Noticeably, the propene formation rate was higher by irradiating the catalytic system. The PW12/BN material resulted more active than PW12/C3N4. The acidity of the HPA cluster accounts for the catalytic role, whereas both the acidity and the redox properties of the…
De la reflexión a la repetición. Un análisis histórico-conceptual de la noción de Destruktion en Heidegger (1919-1927)
2022
La tesis doctoral se propone cartografiar el uso de la noción de Destruktion a lo largo de la Gesamtausgabe (GA) de Heidegger, desde sus primeras lecciones hasta Ser y tiempo. Con dicho estudio se busca esclarecer el significado de la “destrucción de la historia de la filosofía” que Heidegger presenta en el §6 de su opus magnum. A lo largo de los años previos a la publicación de Ser y tiempo se observan tres usos cronológicamente diferenciados de la noción de Destruktion, que constituyen los “sedimentos” a partir de los cuales esta es utilizada en dicha obra. Mediante el primer uso, presente en los textos entre 1919 y 1921 (GA 56/57, 58, 59, 60), la noción es definida como un método filosóf…
Trichuris trichiura egg extract proteome reveals potential diagnostic targets and immunomodulators.
2021
The proteomic analysis was performed at the proteomics facility of SCSIE, University of Valencia (Burjassot, Spain) that belongs to ProteoRed, PRB2-ISCIII, Madrid, Spain. We also thank Dr. Tatiana Corey, Dr. Amy Beierschmitt and Dr. Pompei Bolfa for their support during sample collection.
Legittima la scelta di abrogare parzialmente l'abuso di ufficio mediante decreto-legge
2021
La Corte costituzionale ha dichiarato non fondata la questione di legittimità dell’articolo 23, comma 1, del decreto-legge 16 luglio 2020, n. 76 (convertito nella legge 11 settembre 2020, n. 120) sollevata dal Gup del Tribunale di Catanzaro in riferimento all’articolo 77 della Costituzione, ritenendo legittima l’introduzione dell’art. 323 c.p. mediante decretazione d’urgenza. La Corte ha invece dichiarato inammissibile la questione relativa ai contenuti sostanziali della modifica, che secondo il Gup di Catanzaro avrebbe depotenziato eccessivamente la tutela del buon andamento e dell’imparzialità della pubblica amministrazione e violato il principio di uguaglianza (articoli 97 e 3 della Cost…
Adorno e Heidegger tra dialettica e fenomeologia.
2005
È impresa non priva di difficoltà far convivere nello stesso spazio cartaceo autori come Th. W. Adorno e M. Heidegger, che si muovono all’interno di orizzonti di riflessione filosofica così distanti e rispetto ai quali può sembrare scientificamente pretenzioso ogni tentativo di accostamento, fosse anche questo interamente in direzione di una forte e netta differenziazione. Il presente saggio, riconoscendo la difficoltà di una lettura del rapporto Adorno-Heidegger che pretenda di far dialogare i due autori secondo i termini di un confronto immanente, si propone, tuttavia, di far risaltare i tratti comuni che attestano la loro cittadinanza nell’ambito della proposta di indagine filosofica pro…
Histologic and histomorphometric assessment of eggshell-derived bone graft substitutes on bone healing in rats
2013
Objective: The objective of this study was to histologically and histomorphometrically evaluate the efficacy of the new formulations of eggshell-derived calcium carbonate in rats. Study Design: The study was conducted on 30 adult male rats. Four standardized and circular intrabony defects were created in the both maxilla and mandibula of each animal. Three different graft materials were prepared as follows: 1) Material A: Eggshell-derived calcium carbonate combined with carrageenan gel, 2) Material B: Eggshell-derived calcium carbonate combined with xanthan gum gel, and 3) Material C: Eggshell-derived calcium carbonate powder. The right mandibular defect sites were grafted with Material A i…
Fluke egg characteristics for the diagnosis of human and animal fascioliasis by Fasciola hepatica and F. gigantica
2009
In trematodiases, shape and size of the fluke eggs shed with faeces are crucial diagnostic features because of their typically reduced intraspecific variability. In fascioliasis, the usual diagnosis during the biliary stage of infection is based on the classification of eggs found in stools, duodenal contents or bile. The aim of the present study is to validate the identification of Fasciola species based on the shape and size of eggs shed by humans, characterizing their morphometric traits using a computer image analysis system (CIAS). The influence of both the geographical location and of the host (human and livestock) has been analysed. Coprological studies were carried out in fasciolias…
Potential effects of age-associated oxidative stress on mammalian oocytes/embryos
1996
This bioessay aims to explain the different effects of maternal ageing and postovulatory oocyte ageing on mammalian oocytes/embryos under the scope of 'the oxygen radical-mitochondrial injury hypothesis of ageing'. This hypothesis assumes a key role in the senescent process of oxygen radical damage to mitochondrial DNA, proteins and lipids. It is proposed that a decrease in intracellular ATP concentrations and glutathione (GSH)/glutathione disulphide (GSSG) ratio together with a concomitant increase in cytosolic Ca2+ are major factors causing the observed detrimental effects of ageing on cytoskeletal fibres, fertilization and embryo development.