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101.
Anti-listerial activity of a polymeric film coated with hybrid coatings doped with Enterocin 416K1 for use as bioactive food packaging 总被引:1,自引:0,他引:1
Iseppi R Pilati F Marini M Toselli M de Niederhäusern S Guerrieri E Messi P Sabia C Manicardi G Anacarso I Bondi M 《International journal of food microbiology》2008,123(3):281-287
In this study, Enterocin 416K1, a bacteriocin produced by Enterococcus casseliflavus IM 416K1, was entrapped in an organic-inorganic hybrid coating applied to a LDPE (low-density polyethylene) film for its potential use in the active food packaging field. The antibacterial activity of the coated film was evaluated against Listeria monocytogenes NCTC 10888 by qualitative modified agar diffusion assay, quantitative determination in listeria saline solution suspension and direct contact with artificially contaminated food samples (frankfurters and fresh cheeses) stored at room and refrigeration temperatures. All investigations demonstrated that enterocin-activated coatings have a good anti-listeria activity. Qualitative tests showed a clear zone of inhibition in the indicator lawn in contact with and around the coated film. During the quantitative antibacterial evaluation the L. monocytogenes viable counts decreased to 1.5 log units compared to the control. The inhibitory capability was confirmed also in food-contact assays. In all food samples packed with coated films we observed a significant decrease in L. monocytogenes viable counts in the first 24 h compared to the control. This difference was generally maintained up to the seventh day and then decreased, with the exception of the cheese samples stored at refrigeration temperature. 相似文献
102.
Effects of prior sentential context on the interpretation of unambiguous nouns were investigated in 2 cross-modal priming experiments. Exp 1 showed that a prior priming context affects word interpretation during lexical access by facilitating the recovery of contextually relevant aspects of meaning and inhibiting the recovery of irrelevant aspects. Exp 2 showed that lexical decision on a visual word related to an aspect of meaning of an unambiguous noun is facilitated only by a sentential context containing the noun and priming that aspect. Such facilitation occurs neither when the unambiguous noun is replaced by a substitute noun in the same sentential context, nor when the unambiguous noun occurs in a sentence priming an aspect of its meaning unrelated to the visual word. Furthermore, neither of these 2 conditions produced effects on lexical decision reliably different either from each other or from a sentential context completely unrelated to the visual word. Findings argue against the context-independent model of lexical access and support the hypothesis that lexical access may be affected by prior sentential context. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
103.
Johnson-Laird P. N.; Byrne Ruth M.; Tabossi Patrizia 《Canadian Metallurgical Quarterly》1989,96(4):658
A theory of deductive reasoning is presented for a major class of inferences that has not been investigated by psychologists: inferences that depend on multiply-quantified premises (e.g., "None of the Princeton letters is in the same place as any of the Dublin letters"). It is argued that reasoners construct mental models based on their knowledge of the meanings of quantifiers (and other terms, including relational expressions). Three experiments corroborate the model theory's prediction that inferences that require the construction of only 1 model will be easier than those that require more than 1 model. The model theory assumes that the logical properties of quantifiers emerge from their meanings and are not mentally represented in rules of inference. How such a semantic process can occur compositionally (i.e., guided by the syntactic analysis of sentences) is described. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
104.
F Locatelli P Comoli G Giorgiani AM Carrà G Di Giulio EM Di Maggio N Pellegrini R Maccario 《Canadian Metallurgical Quarterly》1997,11(5):729-731
We describe the case of a child affected by acute lymphoblastic leukaemia who received adoptive immunotherapy after cord blood transplantation (CBT). The patient, transplanted in second relapse resistant to chemotherapy, still showed lung and costal leukaemic nodular lesions 2 months after CBT. For this reason, three infusions of donor peripheral blood leukocytes 1 x 10(7)/kg each were administered on days +60, +80 and +100. The procedure was well tolerated by both patient and donor, and a complete disappearance of the lung lesions was documented 2 months after the last infusion. The patient remains in continuous complete haematological remission 13 months after CBT. This experience suggests that adoptive immunotherapy may be safely employed after CBT in order to increase the contribution of immune-mediated anti-leukaemia effect. 相似文献
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Robert K. Mortimer Patrizia Romano Giovanna Suzzi Mario Polsinelli 《Yeast (Chichester, England)》1994,10(12):1543-1552
We have analyzed by genetic means 43 strains of Saccharomyces that had been isolated from fermenting grape musts in Italy. Twenty eight of these strains were isolated from 28 cellars in the Region of Emilia Romagna. The other 15 strains came from 5 fermentations at four cellars near the city of Arpino, which is located south and east of Rome. We found that 20 of the 28 strains from Emilia Romagna were heterozygous at from one to seven loci. The balance were, within the limits of our detection, completely homozygous. All these strains appeared to be diploid and most were homozygous for the homothallism gene (HO/HO). Spore viability varied greatly between the different strains and showed an inverse relation with the degree of heterozygosity. Several of the strains, and in particular those from Arpino, yielded asci that came from genetically different cells. These different cells could be interpreted to have arisen from a heterozygote that had sporulated and, because of the HO gene, yielded homozygous diploid spore clones. We propose that natural wine yeast strains can undergo such changes and thereby change a multiple heterozygote into completely homozygous diploids, some of which may replace the original heterozygous diploid. We call this process ‘genome renewal’. 相似文献
108.
In this paper a novel process for biotechnological abatement of hydrogen sulphide is presented which details the fundamentals of chemical and biological phenomena involved. The process is based on the combination of two steps to form a closed cycle which has special enviornmental advantages. The chemical step corresponds to the abatement reaction itself with absorption of the gas in a ferric solution. The biological step is related to the regeneration of the absorbing solution by means of specific bacterial strains. Particular interest is devoted to the biological kinetics of the regeneration stage, where several inhibition phenomena appear, and are also related to parameters such as temperature and pH. Results of experimental runs of gas absorption in a laboratory scale plant are also described. 相似文献
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110.
The paper presents the user experience evaluation of Squeeze Me, an interactive cover for tablet and smartphone that enables continuous and expressive interaction with electronic devices. The cover has been used to implement ”Squeeze to zoom”, a mobile application to zoom in and out while taking a photograph from a tablet. The experience of use was evaluated in the short and medium term, comparing the Squeeze Me interaction modality with classic modalities for zooming in and out commonly available on tablets and smartphones. The evaluation process was conducted using AttrakDiff [3] a questionnaire that measures hedonic stimulation and identity, as well as pragmatic qualities and attractiveness of software products. Participants were asked to try out different interaction modalities for comparison in the short-term (67 people) and over 4 weeks (8 people). Results obtained in the short-term evaluation reveal that “Squeeze to zoom” was awarded higher values than the classic “Slide to zoom” in the hedonic quality-stimulation and attractiveness dimensions, whilst it obtained lower values in the pragmatic quality and hedonic quality-identity. However, the experience of use changed over time. During the longitudinal study, the usability of “Squeeze to zoom” improved whilst the attractiveness of “Slide to zoom” decreases significantly. Furthermore results reveal that “Squeeze to zoom” is significantly more appreciated for its hedonic qualities and the effect is maintained over time. This study highlights the importance of evaluating the experience of use over time, a practice that is almost ignored in the literature on Experience Design. 相似文献