Search results for " GC"
showing 10 items of 86 documents
Comparison between Different Techniques for Volatiles Analyses in Coriander (Coriandrum sativum L.)
2011
Although many papers have been devoted to the study of Coriander fruits aromatic pattern, many differences show up according not only to the provenience of seeds, but also to the analytical methods chosen. In our work, samples from one Coriander small-seeded biotype has been analysed, verifying the differences between (1) the oil extracted by means of a Soxhlet apparatus (2) the same oil sampled by means of HS-SPME and (3) the HS-SPME on the roughly ground seeds, all analysed by direct injection in the GC-MS. The volatile composition detected by means of HS-SPME on oil resembles tightly that performed on Soxhlet extract. With respect to the direct injection, the HS-SPME shows a higher sensi…
La Tecnica della microestrazione in fase solida (SPME) per l'analisi quantitativa e qualitativa dei feromoni sessuali degli insetti fitofagi: il caso…
2002
Latvijas Zinātņu akadēmijas, Latvijas Universitātes Astronomijas institūta populārzinātnisks gadalaiku izdevums
2012
Contents: JĀNIS IKAUNIEKS – 100: N.Cimahoviča. Subjacent Was Venture ; I.P. Articles on Jānis Ikaunieks and Articles by Jānis Ikaunieks in Zvaigžņotā debess ; “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: A.Balklavs. Ball Lightning and Solar Activity (abridged) ; Streamer with the USSR State Emblem on Mars (TASS materials) ; NEWS: I.Eglītis. Asteroid Baldone – Christmas Gift for Latvia ; I.Eglītis. LUAI Astrophysics Observatory Discovers First Trojan Asteroid ; V.Kalniņš. Exceeding Speed of Light in CERN Experiment from the Theory of Relativity Viewpoint ; O.Dumbrājs. Higgs Boson ; NOBEL PRIZE WINNERS: D.Docenko. Nobel Prize in Physics for Discovery of Accelerating Expansion of Universe ; SPACE RESE…
Glucokinase Regulatory Protein Gene Polymorphism Affects Liver Fibrosis in Non-Alcoholic Fatty Liver Disease
2014
BACKGROUND AND AIMS: Variant in glucokinase regulatory protein (GCKR), associated with lipid and glucose traits, has been suggested to affect fatty liver infiltration. We aimed to assess whether GCKR rs780094 C-->T SNP influences the expression of steatosis, lobular inflammation and fibrosis in NAFLD patients, after correction for PNPLA3 genotype. METHODS: In 366 consecutive NAFLD patients (197 from Sicily, and 169 from center/northern Italy), we assessed anthropometric, biochemical and metabolic features; liver biopsy was scored according to Kleiner. PNPLA3 rs738409 C>G and GCKR rs780094 C>T single nucleotide polymorphisms were also assessed. RESULTS: At multivariate logistic regression an…
Detection of Irradiated Food and Evaluation of the Given Dose by Electron Spin Resonance, Thermoluminescence, and Gas Chromatographic/Mass Spectromet…
2018
Abstract The treatment of food with ionizing radiation, at doses lower than 10 kGy, is a preservation technology, which can be used to reduce food spoilage due to microorganisms and to decrease insect infestation, enhancing, in the same time, the hygienic quality, extending the shelf life of food itself. In order to increase the general consumer acceptance and accordingly to facilitate the commercialization and trade of irradiated food, the European Committee for Standardization (CEN) validated reliable analytical techniques to identify irradiated foodstuffs for legal control purposes, distinguished in Chemical, Physical, and Microbiological ones, depending on the characteristics of marker …
Sejas un žokļu traumas Paula Stradiņa Klīniskajā Universitātes slimnīcā
2020
Sejas un žokļu traumu ietekme uz hospitalizācijas ilgumu un neiroloģisko simptomātiku Paula Stradiņā Klīniskajā Universitātes slimnīcā. Viena no plašākajām traumu kategorijām, kas tieši pieder pie jebkuras valsts galvenajām sociālekonomiskajām problēmām un skar visus pasaules iedzīvotāju slāņus, un ir galvaskausa, sejas un apakšžokļu traumas. Sejas traumas ir bieži izplatītas, jo seja ir visatklātākā un neaizsargātākā ķermeņa daļa ar nelielu aizsargpārklājumu. Mutes dobuma un augšžokļa sejas traumas, papildus sejas estētikai, ietekmē tādas funkcijas kā elpošana, košļāšanas, rīšanas un runas funkcijas. Darba mērķi: noskaidrot FISS skalas ietekmi uz pareģojošo pacientu hospitalizācijas ilgumu…
Future Projection of precipitation changes in the Júcar and Segura River Basins (Iberian Peninsula) by CMIP5 GCMs Local Downscaling
2021
The basins of the Júcar and Segura rivers, on the Mediterranean coast of the Iberian Peninsula, present a special water problem and are of particular interest regarding climate change. These basins are very vulnerable to a possible scenario of decreasing water resources. Recent studies on historic rainfall since 1955 have indicated an ongoing loss of precipitation in their headwaters, especially in the case of the Júcar river. The aim of the present study is to perform climate projections for the precipitation variable for several future periods (2021–2040, 2051–2070, 2081–2100) and emission scenarios (RCPs 4.5, 8.5) within the Júcar and Segura River Basin authorities. For this purpose, a s…
Determination of selected phthalates by gas chromatography–mass spectrometry in mural paintings from Palermo (Italy)
2013
Abstract Phthalate esters for decades, and probably even now, were used as softeners in water-based paintings. In general, these compounds are dangerous owing to their carcinogenicity and reproductive effects. Phthalates are not chemically but only physically bound to the matrices, hence, they may be leached into the environment and are ubiquitously found in environmental matrices. Considering that, construction is one of most important fields in Europe, and probably worldwide, with respect to its economic, technological and environmental impact. In the present work the phthalate esters content of several mural paintings was evaluated by gas chromatography–mass spectrometry (GC-MS). Because…
Attività antifungina e composizione chimica di oli essenziali estratti da agrumi coltivati in Sicilia.
2014
Risulta comprovata nell’industria agroalimentare l’efficacia di oli essenziali di agrumi quale tecnologia per esaltare la sapidità di cibi e bevande. Ad oggi, il rinnovato interesse verso gli oli essenziali deriva dalle loro proprietà antibatteriche ed antifungine, che possono trovare ampia applicazione in sistemi hurdle-technology ai fini di prolungare la shelf-life di agroprodotti, specie in cibi minimally-processed e di IV gamma. Infatti, la necessità di ricercare nuove sostanze non di sintesi con proprietà antimicrobiche deriva dai cambiamenti legislativi in campo alimentare, dalla tendenza dei consumatori ad acquistare cibi processati naturalmente e dalla crescente resistenza dei patog…
Effetto antimicrobico della componente volatile dell’olio essenziale di mandarino.
2013
Gli oli essenziali, estratti dalle piante, sono composti lipofili contenenti una ampia varietà di elementi volatili. Vengono normalmente ottenuti per distillazione o estrazione con solventi. Trovano impiego nella preparazione di cosmetici, per aggiungere sapore ai cibi e alle bevande e per la formulazione di profumi sia personali che per l’ambiente. Gli oli essenziali hanno recentemente trovato impiego nelle biotecnologie applicate al settore agroalimentare. Sono stati, infatti, utilizzati per ottimizzare le proprietà nutrizionali degli alimenti e per prolungarne la shelf life [1,2]. Gli oli essenziali ottenuti da mandarino sono tradizionalmente usati come antidolorifici, sedativi e curativ…