Search results for "ACID"
showing 10 items of 13107 documents
Utilizzo del pied de cuve fortificato per la fermentazione spontanea di vini rossi di qualità
2018
La fermentazione spontanea è un processo biologico incontrollato durante il quale molti lieviti e/o batteri potrebbero aumentare rapidamente in concentrazioni tali incidere negativamente sulla qualità del prodotto finale. A tal proposito, al fine di ottimizzare la crescita di lieviti con buone attitudini enologiche, si utilizza il metodo “pied de cuve”. Questa tecnica enologica è in grado di realizzare in una determinata massa di mosto dal volume ridotto, una fermentazione alcolica con un ceppo di lievito opportunamente inoculato o con ceppi di lieviti indigeni, naturalmente presenti nel mosto. Al fine di valorizzazione ed aumentare la diffusione di pratiche enologiche basate su un ridotto …
Compuestos bioactivos y capacidad antioxidante en zumos y extractos de residuos, obtenidos por ultrasonidos, de mandarinas híbridas
2022
Los cítricos son el cultivo más importante a nivel mundial. La elaboración de zumos genera grandes cantidades de residuos de fácil degradación, pero con alto contenido de compuestos bioactivos. La extracción asistida con ultrasonidos es uno de los métodos no-convencionales de extracción con resultados favorables. Durante la extracción son necesarios procesos de clean-up que favorezcan la purificación de los extractos para su mejor aprovechamiento. Además, la bibliografía indica que existe un mayor número de estudios con los de cítricos más conocidos, sin embargo, pocas investigaciones muestran resultados en mandarinas híbridas. Por todo ello el objetivo del presente trabajo es el estudio de…
Cold Exposure Affects Lipid Metabolism, Fatty Acids Composition and Transcription in Pig Skeletal Muscle
2021
Cold exposure promotes glucose oxidation and modulates the lipid metabolism in adipose tissue, but it is still not fully clear whether cold exposure could affect meat quality and fatty acid metabolism in skeletal muscle of pig in vivo. Here, we kept finishing pigs under cold or room temperature overnight and determined the effects of cold exposure on meat quality, fatty acids composition and transcriptional changes in skeletal muscle of pigs. We found that cold exposure significantly reduced the meat colour24 h and pH24 h, without affecting carcass characteristics and other meat quality traits. Considerable changes were found in the proportions of individual fatty acids and the total conten…
Removal of silicon from CFB-derived fly ash leachate in the context of phosphorus recovery
2018
High concentrations of dissolved silica in the acid leachate impose two major challenges on precipitation based recovery of phosphorus (P). Firstly, co-precipitation of colloidal silica in the acidic regimes decreases the purity and value of precipitated P-products. In addition, silica scaling on internal surfaces of equipment is also a problematic issue in industrial operations. Therefore, removal of dissolved silica prior to P-recovery process minimizes the risks of Si-contamination in P-products and Si-scaling. In the present study, silica removal was achieved by accelerated silica polymerization with higher acidity and ionic strength of mineral acid, which also assisted the leaching of …
Pilvisovelluksille sopivia tietokannan hallintajärjestelmiä
2012
Tässä tutkielmassa on tarkoitus selvittää, millaisia vaatimuksia pilvisovelluksilla on tietokannan hallintajärjestelmille ja miten ehdotetut järjestelmät täyttävät nämä vaatimukset. Tutkimus suoritetaan kirjallisuuskatsauksena, joka perustuu tieteellisiin julkaisuihin ja tutkimusartikkeleihin.Aluksi käsitellään pilvimaailman käsitteitä, ominaisuuksia ja haasteita tietokannan hallintajärjestelmille. Viime vuosina on kehitetty lukuisia uusia pilvi-sovelluksille suunnattuja tietokantatuotteita, joista suurin osa kuuluu termin NoSQL alle. NoSQL-tietokantatuotteet eivät perustu relaatioihin, eivätkä käytä pelkästään SQL-kieltä tiedon käsittelemiseen. Nämä ovat pilviympäristössä horisontaalisesti…
Servicios Sociales, derechos de ciudadanía y atención centrada en la persona
2011
Tras treinta años de implantación y desarrollo de los servicios sociales en España, nos encontramos en un momento trascendental para el futuro de este sistema, donde los servicios sociales pueden salir de la situación de fragilidad actual, y convertirse en un sistema similar al sanitario o educativo, basado en normas que establecen derechos subjetivos. Por otro lado, la paulatina incorporación de la cultura de la calidad y los nuevos conceptos de calidad de vida, junto con la consideración de estos servicios como de interés general pueden hacer que los servicios sociales del siglo XXI, desplieguen un mayor protagonismo en una situación de crisis económica como la actual, con un papel más re…
RELATIONSHIPS OF SERUM URIC ACID WITH PLASMA RENIN ACTIVITY AND PLASMA ALDOSTERONE IN PRIMARY HYPERTENSION.
2013
Introduction: In experimental studies conducted in rats, raising serum uric acid (SUA) levels resulted in stimulation of renin expression. Studies in humans exploring the association of SUA with plasma renin activity (PRA) yielded conflicting results. Moreover, little is known about the relationship between plasma aldosterone concentration (PAC) and SUA. Aim: To analyse the relationships between SUA, PRA and PAC in a group of subjects with primary hypertension. Methods: We enrolled 372 patients (mean age 45 ± 12 years; women 33 %), with untreated primary hypertension, with normal renal function and without cardiovascular complications. Results: Spearman’s rank-correlation analyses showed th…
Toward Sustainable PLA-Based Multilayer Complexes with Improved Barrier Properties
2019
Poly(lactic acid) or PLA is currently considered as one of the most promising substitutes of conventional plastics, with low environmental impact, especially for food packaging applications. Nevertheless, some drawbacks, such as high permeability to oxygen, are still limiting its industrial applications. The objective of this study was to highly increase the oxygen barrier performance of PLA without compromising its sustainable nature and following the principles of circular economy perspective. Coproducts coming from mill industries, such as wheat gluten proteins (WG), were used to produce PLA-WG-PLA multilayer complexes with improved barrier performance. Different technologies of industri…
Plasma PAF-acetylhydrolase in patients with coronary artery disease: results of a cross-sectional analysis.
2003
Inflammation underlies both onset and perpetuation of atherosclerosis. Plasma lipoproteins transport the platelet-activating factor-acetylhydrolase (PAF-AH) with potentially anti-inflammatory activities. Our aim was to determine whether PAF-AH activity was associated with inflammatory markers and with coronary artery disease (CAD). PAF-AH activity and a panel of inflammatory mediators were measured in plasma of 496 patients with CAD and in 477 controls; 276 patients presented with stable angina pectoris and 220 with acute coronary syndrome (ACS). Individuals within the highest quartile of PAF-AH activity had an 1.8-fold increase in CAD risk [95% confidence interval (CI), 1.01 to 3.2; P = 0.…
Facile and efficient chemical functionalization of aliphatic polyesters by cross metathesis
2016
International audience; An effective preparation of new tailor-made macromolecular materials via a combination of two (atom-efficient) catalytic transformations is reported. First, new aliphatic polyesters with alternated composition have been prepared using a salen aluminum catalyst system. Next, the pendant vinyl moieties in those copolymers have been selectively transformed into various functional groups by metathesis in the presence of homogeneous Grubbs catalysts. The latter metathesis reaction has been optimized in terms of catalytic activity and selectivity, to define the conditions for an effective and safe procedure that does not affect the macromolecular architecture. All polymer …