808 research outputs found
Study on the morphological evolution of bud break in Vitis vinifera L.
The aims are to evaluate morpho-anatomical bud development during dormancy and to compare the heat requirement needed to start bud break in several grapevine cultivars characterised by different geographic origins. A detailed description is presented of the bud growth stages of Vitis vinifera cultivars to contribute to the standardisation of national and international testing systems of fruit growing. Based on the general BBCH-scale, the codes describe the first stages of budbreak in several cultivars with different geographical origins. Dormancy release was evaluated both under natural and forcing conditions, appropriate method to establish the budbreak of deciduous species. The cultivars were characterised in relation to the achievement of complete bud scale opening stage (03 of BBCH scale) which is suggested to consider as an early and indicator of budbreak.
Evaluation of the effect of esca disease on bud break in Vitis vinifera L.: possible relationship between cultivars and rootstocks
The aim of this study was to investigate the effect
of esca disease on bud break of grapevine in relation
to different rootstock combinations. For this purpose
under field conditions observations of flower bud phenological
stages were carried out on three widespread
grapevine cultivars 'Cabernet Sauvignon', 'Sangiovese'
and 'Trebbiano toscano'. Further phenological observations
were recorded under forcing conditions using
'Cabernet Sauvignon' as the most susceptible to esca
disease. Each cultivar was grafted on K5BB, 1103P
and own rooted. The plants were infected by esca due
to the natural presence of fungi in the vineyard. Results
showed that esca disease significantly delayed bud
break of symptomatic vines for several years. Grapevines
on different rootstocks showed different bud
break changes, in particular those on K5BB were the
most susceptible to esca
Evaluation of the effect of esca disease on bud break in Vitis vinifera L.: Possible relationship between cultivars and rootstocks
The aim of this study was to investigate the effect of esca disease on bud break of grapevine in relation to different rootstock combinations. For this purpose under field conditions observations of flower bud phenological stages were carried out on three widespread grapevine cultivars 'Cabernet Sauvignon', 'Sangiovese' and 'Trebbiano toscano'. Further phenological observations were recorded under forcing conditions using 'Cabernet Sauvignon' as the most susceptible to esca disease. Each cultivar was grafted on K5BB, 1103P and own rooted. The plants were infected by esca due to the natural presence of fungi in the vineyard. Results showed that esca disease significantly delayed bud break of symptomatic vines for several years. Grapevines on different rootstocks showed different bud break changes, in particular those on K5BB were the most susceptible to esca.
The FOOT GROUND REACTION ON THE SOCCER AND RUGBY PLAYER
Introduction The body’s motion must be interpreted a succession of elementary movements that can be studied as the combination of translational and rotational motions. The correct expression of a motion is dependent on the balance between internal and external forces. The vector and scalar characteristics of the reaction are related to the physical and mechanical characteristics of two structures coming in contact Methods and Materials The analysis is performed during the normal strike and the running of the soccer and the rugby player. We have used a dynamometric platform Kistler that provided the complete progression of the foot ground reaction which deve1opes during the stage of placing of the fool on the ground.24 soccer p layers of Italian national team and 40 soccer players with high ability and performance and 50 rugby players are examined and the tests are correlated with a control reference group of normal subjects. Results The analysis of the soccer players’ foot-ground reaction on the sagittal plane has revealed: during the normal strike an impact phase characterized by high force both maximum and medium and high velocity of progression of application's point. A support phase characterized by velocity of progression of application point lower compared to the impact phase and by the backward inclination of vectors. A propulsive phase with a presence of a peak of force lower than the first one in the contact phase and with rotational moment significantly increased compared to the normal. The trace diagram show a wider extension of internal rotation during the contact phase and movement with a predominance of an external rotation during the support phase. The analysis of the rugby players' fool-ground reaction has revealed on the sagittal plane: during the normal strike an impact phase with high force both maximum and medium and high velocity of progression of application's point. In comparison of the soccer player’s ground reaction the data show values reduced of force during the impact phase. A support phase shows backward inclination of vectors and a reduced velocity of progression compared to the impact phase. A propulsive phase demonstrate a presence of a peak of force same that the first one during the contact phase. On the horizontal plane, the trace diagram shows a normal extension of internal rotation and a significantly extension of external rotation. Conclusions: The ground reaction pattern of the professional soccer player is repetitive, typical and different by the pattern of the vectorial diagram of the rugby player
Esca symptoms appearance in Vitis vinifera L.: influence of climate, pedo-climatic conditions and rootstock/cultivar combination
This study investigated the appearance of esca symptoms in relation to environmental factors and the rootstock/cultivar combination in an experimental setting between 2004 and 2009. Among the common genotypes showing susceptibility to the esca disease, four cultivars were considered: ‘Cabernet Sauvignon’, ‘Sangiovese’, ‘Trebbiano Toscano’ and ‘Chardonnay’. These cultivars were studied own-rooted and in combination with two rootstocks: Kober 5BB and 1103 Paulsen. The difference in susceptibility of cultivars to esca appeared negatively related to the graft. No clear relation was found between esca appearance and environmental factors. Moreover, an unexpected discordance between esca incidence percentage and mortality rate was observed.
Gas Exchange, Stem Water Potential and Xylem Flux on Some Grapevine Cultivars Affected by Esca Disease
The effect of esca disease on gas exchange, stem water potential and xylem flux of adult grapevines of CabernetSauvignon, Sangiovese and Trebbiano cultivars was studied over three growing seasons. Water relations weremeasured at véraison and cluster ripening on three types of vines: i) healthy (control); ii) symptomatic and iii)apparently healthy in the year of measurements but that had showed esca symptoms in the previous season. Xylemflux was determined on cane segments by perfusion using a tracing dye before and after the appearance of escasymptoms. Esca induced a marked reduction (about 70%) in carbon assimilation and stomatal conductance,especially in Cabernet Sauvignon and Sangiovese. Esca did not affect the stem water potential. Gas exchangeparameters measured before the symptoms appeared in plants affected by esca were similar to those of healthyplants. Measurements made one month before the appearance of the symptoms cannot be used as screening methodto determine whether the vine will show esca. No differences in dye translocation were found before the symptoms’appearance. However, a decrease in xylem flux was measured in symptomatic vines of Cabernet Sauvignon. Afterthe appearance of esca symptoms, only the Trebbiano had a lower xylem flux than the healthy vines
The small reservoirs project: Research to improve water availability and economic development in rural semi-arid areas
Osteopontin as Candidate Biomarker of Coronary Disease despite Low Cardiovascular Risk: Insights from CAPIRE Study
Stratification according high cardiovascular (CV) risk categories, still represents a clinical challenge. In this analysis of the CAPIRE study (NCT02157662), we investigate whether inflammation could fit between CV risk factors (RFs) and the presence of coronary artery disease (CAD). In total, 544 patients were included and categorized according with the presence of CAD and CV risk factor burden (low/multiple). The primary endpoint was to verify any independent association of neutrophil-related biomarkers with CAD across CV risk categories. The highest values of osteo-pontin (OPN) were detected in the low RF group and associated with CAD (23.2 vs. 19.4 ng/mL; p = 0.001), although no correlation with plaque extent and/or composition were observed. Con-versely, myeloperoxidase (MPO) and resistin did not differ by CAD presence. Again, OPN was identified as independent variable associated with CAD but only in the low RF group (adjOR 8.42 [95% CI 8.42\u201346.83]; p-value = 0.015). As an ancillary finding, a correlation linked OPN with the neutrophil degranulation biomarker MPO (r = 0.085; p = 0.048) and resistin (r = 0.177; p = 3.4
7 10 125 ). In the present study, OPN further strengthens its role as biomarker of CAD, potentially bridging subclinical CV risk with development of atherosclerosis
Heavy metals in the muscle and hepatopancreas of red swamp crayfish (Procambarus clarkii) in campania (italy)
The aim of this study was to carry out a quali-quantitative analysis of the presence of non-essential and essential trace elements in freshwater crayfish (Procambarus clarkii) edible tissues to establish the healthiness of this product and to evaluate the pollution status of the sampling sites included in the present study. P. clarkii is one of the most common species of freshwater crustaceans in Italy, regularly consumed by local people. Moreover, the crayfish, due to its trophic position and diet, can be considered as an excellent bioindicator of the health status of the ecosystem. We collected sixty crayfish samples from two different sites in Campania (Italy): Villa Literno and Sessa Aurunca. Concentrations of trace elements were determined by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). Our data showed low concentrations of Cd, Hg and Pb, with values below the European Commission MRL (Commission Regulation (EC) 1881/2006). We suggest that data obtained from this study showed that crayfish collected from Villa Literno and Sessa Aurunca were safe for human consumption. Furthermore, the results of this research indicated mild contamination of heavy metals of the sampling sites, indicating a good health status of the area’s aquatic ecosystem
NUMERICAL HEAT TRANSFER ANALYSIS OF AN INNOVATIVE GAS TURBINE COMBUSTOR: COUPLED STUDY OF RADIATION AND COOLING IN THE UPPER PART OF THE LINER
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