541 research outputs found
Intermediate Institutions for Interactive Learning Processes in a Governance Perspective: the Case of Aeronautic Industry in Campania Region.
The present paper presents the results of the empirical analysis on fifteen enterprises and twenty no-industrial organizations involved at different level in the Aeronautical Cluster in the Campania Region. Information and data on the selected sample are colleted both by a study of the industrial sector, and also by suitable questionnaires and interviews, that the authors have submitted to the entrepreneurs and to the top managers of either the enterprises or the no-industrial organizations. The authors have focalized their study by applying the SWOT analysis on the following issues: ĂąâŹÂą the clusterâs structure by analysing the relational skill developed by single actors of the cluster and by their impact on the innovation capacity of the enterprises; ĂąâŹÂą the effectiveness of clusterâs governance strategies and how different actors actually participate to the local development processes of the aeronautical industrial sector. On these bases the authors wanted to deduce possible policy options for different kind of actors to optimize the clusterâs governance. Particularly they will describe in the present paper some indications to: 1) the SMEâs that present strong relations with customers but low integration with large part of the others actors, i.e. with no-customers enterprises; 2) the large enterprises related to the industrial policies and to the suppliers' governance; 3) the policy makers at local level and the intermediate institutions for a better support of the local enterprises. In fact, the research results are based on the conscientious awareness that the analyzed sector is at a critical point, for which it is necessary that all the actors involved put together their efforts in order to steer and to direct the development process, both by identifying participative mechanisms at local level and also by strengthening those exogenous elements which are able to promote local development. Obviously only part of the criticisms can be solved at local and national level and some of them can be solved only partially. This observation opens the question of policy at the international level which can be determinate only with a more exhaustive integration into transnational networks. The research described in the present paper has been undertaken within the framework of the project: ĂąâŹĆIKINET â International Knowledge and Innovation Networkù⏠(EU FP6, NĂ° CIT2-CT-2004-506242).
A blast of mistakes: undiagnosed cervical ppondylolisthesis following a bomb explosion
Background: A case of spinal trauma had an unusual clinical course due to medical mistakes, from which we can learn some important lessons.
Case Report: We report a case of spondylolisthesis following a bomb explosion, which went undiagnosed for a long time because of a series of mistakes that are highlighted in this article. What makes this case unique is that the spondylolisthesis developed during hospital stay, but the patient had no loss of mobility, strength, or sensitivity.
Conclusions: This case shows that establishing the conditions of an organ or a body part upon admission to hospital may not be enough when a patient has suffered extensive and serious trauma, and that it is necessary to carry out more checkups over time, especially if there are new clues and symptoms
Surgical approach to the cavernous sinus for a trigeminal schwannoma resection: technical note and case report
We report a rare case of schwannoma of the lateral wall of the cavernous sinus, an exceedingly rare lesion affecting this anatomical district, and discuss salient aspects of the surgical approach to the cavernous sinus, which are traditionally considered technically challenging due to the high risk of postoperative morbidity and mortality related to the presence of the cranial nerves and internal carotid artery
Resistance to frost and tuber soft rot in near-pentaploid Solanum tuberosum - S. commersonii hybrids
The objectives of the present study were to evaluate the tolerance to low temperatures and tuber soft rot in sexual near-pentaploid hybrids between incongruent 2x (1EBN) Solanum commersonii (CMM) and 4x (4EBN) S. tuberosum (TBR). For freezing resistance, killing temperatures both under non-acclimated and un- der acclimated conditions were determined using the ion leakage procedure. Values for the hybrids were dis- tributed between the wild and cultivated parental values. Some hybrids displayed an acclimation capacity close to 2.5°C, typical of hardy species. Artificial inoculation of tubers with Pectobacterium carotovorum ssp. carotovorum (formerly Erwinia carotovora ssp. carotovora) provided evidence of variability in disease response. Highly resistant hybrids were identified. After conventional phenotypic selection, wild genome content was estimated based on the presence of CMM-specific AFLP fragments. Seven primer combinations were used (Eco-AGG/Mse-CAA; Eco-ACC/Mse-CAT; Eco-ACT/Mse-CAC; Eco-ACT/Mse-CAG; Eco- ACT/Mse-CAA; Eco-ACT/Mse-CAT; Eco-AGG/Mse-CAG). The percentages of CMM-specific AFLPs ranged from 4.3% to 56.7%, with an average value of 28.1%. AFLP analysis was employed for the selection of the hybrids to be used for further breeding objectives
Ancient Schwannoma of the Cauda Equina: our experience and review of the literature
Ancient schwannomas (AS) are exceedingly rare variant of common schwannomas (CS). Only two cases involving the cauda equina region have been previously reported in literature. AS are typically associated with a higher histological degree of degenerative changes (Antoni B areas). It is of peculiar importance, according to our opinion, to outline that, because of their extremely slow growth (which explains the increase of the degenerative changes in respect to the CS) and their typical soft consistency in respect to their standard counterparts, AS usually imply an even better prognosis
Anterior-to-Posterior Migration of a Lumbar Disc Sequestration. Surgical Remarks and Technical Notes about a Tailored Microsurgical Discectomy
Extrusion of disc material within the spinal canal complicates up to 28.6% of lumbar disc herniations. Due to the anatomical "corridors" created by the anterior midline septum and lateral membranes, relocation occurs with an anterior and anterolateral axial topography. Posterior migration is an extremely rare condition and anterior-to-posterior circumferential migration is an even rarer condition. Its radiological feature can be enigmatic and since, in more than 50% of cases, clinical onset is a hyperacute cauda equina syndrome, it may imply a difficult surgical decision in emergency settings. Surgery is the gold standard but when dealing with such huge sequestrations, standard microdiscectomy must be properly modified in order to minimize the risk of surgical trauma or traction on the nerve roots
Assessing the real benefits of surgery for degenerative lumbar spinal stenosis without instability and spondylolisthesis: a single surgeon experience with a mean 8-year follow-up
Background: The degenerative lumbar spinal stenosis is one of the most commonly treated spinal disorders in older adults; despite its increasing frequency, it is not yet clear what the most effective therapy might be. The aim of this study is to investigate the very long term results of a homogenized cohort of patients suffering from lumbar spinal stenosis: the first subset of patients operated on with laminectomy and the second subset of patients was also advised to undergo laminectomy but never operated on. Methods: Patients from both subgroups were advised to undergo surgery, according to the same criteria, in the period between 2000 and 2010 and were re-evaluated in the period between January and December 2016. Results: Comparing the two subsets of patients, both suffering from clinically relevant LSS, the first subset returns a statistically significant clinical improvement at follow-up. The rate of excellent results decreases over years. Iatrogenic spinal instability incidence was found to be 3.8% in the present cohort. Conclusions: Although the improvement of the first postoperative years decreases over time and despite the lack of general consensus, the lack of established shared guidelines and the limitations of this research, the results support the utilisation of surgery for the management of this condition. Level of Evidence: 3
The effect of regulated deficit irrigation on growth, yield, and berry quality of grapevines (cv. Sangiovese) grafted on rootstocks with different resistance to water deficit
The aim of this work was to investigate the effect of full irrigation (FI), pre-veraison water deficit (RDI 1), or post-veraison water deficit (RDI 2) on growth, yield, and berry quality in container-grown, mature vines of cv. Sangiovese grafted onto either 1103P or SO4 rootstock over two consecutive growing seasons. Deficit irrigation regimes significantly affected vine water status of both rootstocks before and after veraison. Trunk diameter (TD) increment was markedly affected when water was restricted early, but not in the post-veraison period. Deficit irrigation from fruit set to veraison inhibited vegetative growth (TD, canopy volume, and weight of pruned wood) more than that applied from veraison to harvest. Yield was unaffected by either irrigation or rootstock in both years. Irrigation had a marked effect on berry and juice quality: the RDI 1 treatment induced the highest berry anthocyanin concentration, and the lowest titratable acidity (TA), which, instead, increased in the RDI 2 treatment. RDI treatments did not modify berry dry weight, soluble solid content, TA, anthocyanins, and epicarp total phenols in vines on both rootstocks
Oil accumulation in intact olive fruits measured by near infrared spectroscopy-acousto-optically tunable filter
A field experiment was conducted to test the reliability of the near infrared spectroscopy (NIR) method to measure mesocarp oil content in vivo against nuclear magnetic resonance (NMR) determinations using three different olive cultivars at different stages of ripening.
RESULTS: In PLS model carried out for the cultivar Arbequina the R2c (coefficients of determination in calibration) obtained was of 0.991, while the R2cv (coefficients of determination in cross-validation) of 0.979; for the cultivar Frantoio the indexes were respectively of 0.982 and 0.971, for the cultivar Leccino of 0.977 for R2c and 0.965 for R2cv. Finally, for the combined model (sum of the three varieties) those indexes were respectively equal to 0.921 and 0.903. The RPD ratio was insufficient for predictive model of cultivar Leccino only (1.98), whereas in other cases RPD ratios were completely sufficient, within the estimation range over 2.5 - 3 (2.61 in global model, and 4.23 in cultivar Frantoio), or describing a great capacity with values greater than 5 as in the case of the cultivar Arbequina (9.58).
CONCLUSION: The NIR proved a novel, rapid, reliable method to monitor the oil accumulation process in intact olive fruits in the field. The innovative approach of coupling NIR and NMR technologies opens new scenarios for determining the optimal time for harvesting olive trees to obtain maximum oil production
Interspecific somatic hybrids between Solanum bulbocastanum and S. tuberosum and their haploidization for potato breeding.
Protoplast fusion between incongruent Solanum bulbocastanum and S. tuberosum haploids was accomplished to produce hybrids combining elite traits from both parents. We identified 11 somatic hybrids out of 42 regenerants analyzed through ISSR markers. Some hybrids had loss or gain of fragments compared to the parents, likely due to rearrangements and deletions of chromosome segments after fusion, and/or to somaclonal variation during hybrid regeneration. Increased heterotic vigor for some traits as well as high diversity was observed as the effect of both ploidy and fusion combination. Microsporogenesis analysis indicated the occurrence of multivalent configurations and several meiotic abnormalities, such as chromosomes bridges and various spindle orientations. Since all hybrids were sterile, in vitro anther culture was employed for haploidization as a possible strategy to overcome barriers to hybridizations. Haploids were obtained from all the tetraploid S. bulbocastanum (+) S. tuberosum somatic hybrids tested, although with differences in both the number of embryos per 100 anthers cultured and the number of differentiated green plantlets. This is the first report on the successful production of haploid plants from S. bulbocastanum (+) S. tuberosum hybrids
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