Search results for "Preservation"

MALTE INNOVATIVE IN AMBITO ARCHEOLOGICO

2015

The aim of this study is the formulation of a special mortar with improved adhesion, elasticity, workability, water resistance compared to traditional mortars. This has been achieved thanks to the addition of nanostructured products able to influence the reaction of water with the hydraulic binder, in order to reduce the drying shrinkage and the subsequent micro-cracks, increasing the elasticity of the material and favoring the anchoring to the surface application. The study focused on laboratory testing of innovative mortars, based on a mixture of hydraulic lime, pozzolana and a nanostructured additive based on silica nanoparticles in aqueous solution. The physical and mechanical character…

Scientific investigation to preserve our architectural heritage: experimental application in Sicily between 2002 and 2012

2014

The essay introduces the result of thermographic surveys and other scientific applications on some Sicilian monuments, and demonstrates the clear evolution of the method to support an effective conservation of ancient buildings. The method introduced is useful to get a metric thermal image to be edited with the photogrammetric image of the architectural surfaces simultaneously, and related with the results of other kind of diagnostic tests. Some examples of its application are introduced and critically commented to understand all the potentialities of the investigation in the discipline of the restoration of cultural heritage.

Gas chromatographic/mass spectrometric and microbiological analyses on irradiated chiken

2007

Ionizing radiation is widely used as treatment technique for food preservation. It involves among others reduction of microbial contamination, disinfestations, sprout inhibition and extension of shelf life of food. However, the commercialization of irradiated food requires the availability of reliable methods to identify irradiated foodstuffs. In this paper, we present results on the application to irradiated chicken of this method, based on the detection, in muscle and skin samples, of the peaks of ions 98 Da and 112 Da, in a ratio approximately 4:1, typical of radiation induced 2-dodecylcyclobutanones (2-DCB). Aim of the work was also to study the time stability of the measured parameters…

Study of the retention and release of n-hexanal incorporated into soy protein isolate–lipid composite films

2010

[EN] This work deals with the study of the kinetic of aroma release, which had been previously incorporated into soy protein isolate (SPI)-lipid composite films. The aim was to determine the influence of type and amount of lipidic material on aroma (n-hexanal) release and retention, as well as the apparent diffusion coefficients. To carry out this study it have been employed SPI-based films containing two SPI:LIPID ratios (1:0.25 and 1:0.5), and two types of lipids, oleic acid (OA) and beeswax (BW), in OA:BW ratios 100:0, 70:30, 50:50, 30:70 and 0:100. The measurements were performed by a gas chromatography technique. The films that showed more retention were SPI:LIPID 1:0.5 100% BW and con…

Application of L-PRF for socket preservation of an anterior fractured tooth in a young patient: a case report

2020

Extension of Tosela cheese shelf-life using non-starter lactic acid bacteria

2011

Six strains of non-starter lactic acid bacteria (NSLAB) were used to extend the shelf-life of the fresh cheese Tosèla manufactured with pasteurised cows’ milk. The acidification kinetics of three Lactobacillus paracasei, one Lactobacillus rhamnosus and two Streptococcus macedonicus were studied in synthetic milk medium. Lb. paracasei NdP78 and NdP88 and S. macedonicus NdP1 and PB14-1 showed an interesting acidifying capacity and were further characterised for growth in UHT milk and production of antimicrobial compounds. Lb. paracasei NdP78 and S. macedonicus NdP1 grew more than 2 log cycles in 6 h. Lb. paracasei NdP78 was also found to produce a bacteriocin-like inhibitory substance (BLIS) …

Impact of resection margin status and revision transoral laser microsurgery in early glottic cancer: analysis of organ preservation and local disease…

2022

Abstract Introduction Transoral laser microsurgery represents the treatment of choice for early glottic cancer. Its use and effectiveness are mainly related to laryngeal exposure and deep extension of tumor. Histopathologic assessment of surgical margin presents a main issue about transoral laser microsurgery and complete oncological excision. Objective The aim was to analyze the impact of revision surgery on organ preservation and local disease control in patients with early glottic cancer treated by transoral laser microsurgery. Methods We carried out a retrospective study on a cohort of 153 patients with early glottic cancer (Tis, T1, T2) treated by transoral laser microsurgery. Resectio…

The influence of storage method on the transparency of pig crystalline lens

2019

Este artículo se ha publicado de forma definitiva en: http://www.scielo.br/pdf/abo/v82n1/0004-2749-abo-82-01-0056.pdf Purpose: The porcine eye is frequently used as a research model. This paper analyzes the effect of different storage methods on the transparency of pig crystalline lens. Methods: A spectral transmission curve (from 220 to 780 nm) for the crystalline lens was determined experimentally after storage in different conditions: saline solution, formalin, castor oil, and freezing at -80°C. The total transmission in the visible spectrum, which was used as an index of transparency, was calculated from these curves. For comparative purposes, fresh lenses were evaluated and used as con…

A third space: discursive realizations of immigrant identity

2015

The relationship between additional language use and identity has long been of interest to scholars studying immigration and multilingualism. While oral language is frequently examined as a site for the negotiation of identity, written texts can also be studied for information about how language learners position themselves within their receiving culture. This study looks at the relationship between pronoun choice and identity in additional language academic writing by first generation immigrants in Norway, arguing that language learners signal solidarity with certain subject positions through their use of pronouns. Examining English-language texts discussing themes related to language pres…

Compromised integrity of excised porcine intestinal epithelium obtained from the abattoir affects the outcome of in vitro particle uptake studies

2002

Excised porcine intestinal tissue obtained from the local abattoir was studied for its suitability to examine the uptake and transport of poly(lactic-co-glycolic acid) (PLGA) nanoparticles in Peyer's (PP) and non-Peyer's patch (NPP) tissue in vitro. Incubation of such tissue with fluorescent PLGA and polystyrene particles revealed negligible uptake into the intercellular space with no noticeable difference between PP and NPP tissue. Similarly, yeast cells, which were used as a positive control for selective uptake into PP tissue, were found in the subepithelial area of both PP and NPP tissue. Therefore we examined the morphological integrity of the tissue for the duration of the experiments…