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Bibliografia : p. 222
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Fisiologia e bioquimica vegetal
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Bibliografia : p. 235
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Música electrónica
DOI: 10.1080/00103624.2010.508296
Bee pollen contains almost all nutrients required by the human organism as well as diverse health-promoting substances. However, its composition and nutritional value greatly depend on the botanical origin. As such, it is importante to develop a rapid and non-expensive methodology that allows studying its characteristics, making labelling more objective and easier. The FTIR-ATR technique was used to predict some nutritional parameters in 126 bee pollen samples. FTIR-ATR spectrum obtained in the region between 4000 and 400 cm−1 with PLS Regression models were used to correlate spectral information with the data obtained using reference methods. In this first approach with pollen samples, good correlation models with appropriate accuracy were obtained for the evaluated parameters with r2 varying from 74.8 to 97% and residual prediction deviation between 2.0 and 5.8. These results suggest that FTIR-ATR may be a useful technique for assessing bee pollen’s composition.
Honey with Bupleurum spinosum (zandaz) as a main pollen source has not been the subject of previous detailed study. Therefore, twelve Moroccan samples of this honey were subjected to melissopalynological, physicochemical and micro-biological quality characterization, as well as antioxidant activity assessment. From a quality point of view, almost all samples were within the limits established by Codex Alimentarius, and/or the European legislation. All samples presented predominance of B. spinosum pollen (more than 48%). Relatively high levels of trehalose (1.3–4.0 g/100 g) and elezitose (1.5–2.8 g/100 g) were detected. Those sugars, not common in monofloral honeys, could be used as na important factor to discriminate zandaz honey. Flavonoid content correlated positively with the honey color, melanoidin and polyphenol content, and negatively with the IC50 values of scavenging ABTS (2,2´-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) free radicals, while proline amount correlated negatively with IC50 values of nitric oxide scavenging activity and chelating power. This correlation supports the use of anti-oxidant activities as important variables for PCA (principal component analysis). Both components explained 70% from the given data, and showed certain homogeneity upon analyzed samples independent of the region, suggesting the importance of B. spinosum nectar in the resulting
honey characteristics.
Understanding customer loyalty has been a growing concern for the services industry. In a context of increasing competitive pressures, such loyalty is seen as a key element in service companies’ success. Maintaining customer loyalty and identifying its underlying factors, however, are recognizably di cult to do. Grounded on the use of cognitive mapping techniques, this paper proposes a knowledge-based framework for the identi cation of the key determinants of customer loyalty, and the relationships among them. A step-by-step guide to the development of such a framework is presented, and illustrated through a practical application in the banking context. e resulting ndings are supportive of the applicability of such methods for understanding customer loyalty, and the improvement of long-term relationships with customers. ey are furthermore indicative of new ways in which knowledge can be incorporated into management activities to improve service outcomes. Some managerial implications of our contribution and avenues for future research are also reported.
Constant Work-in-Process (ConWIP) is a card-based control system that was developed for simple flow shops – a lack of load-balancing capabilities hinders its application to more complex shops. In contrast, load balancing is an integral part of Workload Control, a production planning and control concept developed for high-variety environments. One means of load balancing evident in the Workload Control literature is through the use of a capacity slack-based backlog-sequencing rule. This study therefore investigates the potential of the backlog-sequencing decision to improve load balancing in the context of ConWIP, thereby making it suitable for more complex, high-variety environments. Using simulation, we demonstrate that: (i) the choice of backlog-sequencing rule significantly impacts throughput times and tardiness-related performance measures; and (ii) capacity slack-based sequencing rules achieve significant performance improvements over ‘classical’ ConWIP backlog-sequencing rules. These results significantly extend the applicability of ConWIP. Results from the Workload Control literature however do not directly translate across to ConWIP. The simplified release procedure of ConWIP makes backlog-sequencing based on planned release dates dysfunctional. This negatively impacts the performance of modified capacity slack-based sequencing rules that were recently shown to be the best choice for Workload Control.
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Phosphorus (P) is a non-renewable resource highlighting the significance of developing and using alternative P sources for a sustainable agriculture. The work aims to compare the effects of different organic amendments (OA) and a mineral P fertiliser as reference on P use efficiency by the crop, and on P losses to runoff waters and eroded sediments. A two-year field trial was conducted in a Dystric Regosol with Lolium sp. Treatments were: cattle manure compost (CM), solid fraction of swine (SS) and duck (DS) slurries and triple superphosphate (TSP), each applied at 50 kg P ha−1 year−1. Olsen P (mg P kg−1) increased from ≈ 19 at the beginning to ≈ 30 (TSP, CM), 45 (SS) and 62 (DS) after the experiment. Most of applied P remained in soil, between 92% (SS) and 96% (TSP), plant uptake ranged from 5% (CM) to 3.5% (TSP) and total P loss in runoff and sediments ranged between 0.2% (CM) and 4% (SS). OA increased P-use efficiency by the ryegrass crop compared with mineral P fertilizer. Composted cattle manure showed the best agronomic and environmental behaviour, simultaneously increasing P-use efficiency and decreasing P losses by runoff and erosion.
The phytoavailability of soil phosphorus (P) depends on the different forms in which it occurs and how these forms change after the application of P fertiliser to the soil. Forms of P in the A, B and C horizons of
eleven pedons that developed on mafic rocks were characterised by a fractionation method before and after fertilisation with single superphosphate, and a micropot experiment was conducted to assess the shortterm
use of P fertiliser by rye (Secale cereale L.). The main sources of P to the crop were (i) phosphate adsorbed on mineral surfaces and pedogenic Fe, Al or Ca phosphates in the A horizon and (ii) Ca-phosphates in B and C horizons. In the C horizons, poor in Fe/Al phases and clay, the precipitated Ca-P showed low solubility, resulting in a reduction in shot biomass. The apparent P recovery by rye was similar in the A (36%) and B
(29%) but decreased in the C (15%) horizons. The partial factor productivity (g g−1) decreased from the A (58) to B (11) and C (5) horizons. P phytoavailability decreased with increasing profile depth because the
transformation of P fertiliser to poorly soluble Ca-P forms increased with depth.
5th International Conference Wastes : Solutions, Treatments and Opportunities, Costa da Caparica, Lisboa, 4-6 setembro de 2019.
There has been an increased interest in understanding entrepreneurship practices in a regional development context, which has led to the concept of entrepreneurial regional innovation systems being developed (Cooke & Leydesdorff, 2006). The reason for this is due to the role entrepreneurial activity and resulting firm creation has on regional economic growth (Acs & Armington, 2004; Audretsch & Keilbach, 2005). Exercising a sense of embeddedness is a key determinant of individuals and firms choosing to locate in a region but it is also influenced by the entrepreneurship embedded in a region (Audretsch & Belitski, 2017). Whilst recent articles in European Planning Studies have stressed the need for entrepreneurship to be more integrated into regional innovation research (e.g. Cabras & Mount, 2015; Cooke, 2017; Stam, 2015; Yun, Cooke, & Park, 2017), less is known about how it is embedded in a region utilizing innovativeness and creativity perspectives.Thismeansamoreexplicitrecognitionoftheroleentrepreneurshipplaysandits interlinkages with regional studies can increase policy and research initiatives around this topic. This special issue is concerned with developing new perspectives on regional innovation systems and entrepreneurial embeddedness, thereby, offering exciting new directions for research about how the dynamics of innovation in a regional development context are explained by emerging entrepreneurial practices.
This research seeks to identify the factors that best explain the performance of regional innovation in Europe, in the era of smart specialization. Data were collected from the Regional Innovation Scoreboard 2016 and a quantitative methodology was followed using linear regressions as statistical methods. The results allowed us to reach four explanatory models of performance innovation for Innovative Regions Leader, Strong, Moderate and Modest. Some policies have also been suggested as possible regional innovation measures that can help policy makers to clarify and improve the innovation performance of these regions.
“This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Industrial and Production Engineering on 30-05-2018, available online: http://www.tandfonline.com/10.1080/21681015.2018.1479895.”
This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Industrial and Production Engineering on 13/02/2019, available online: https://www.tandfonline.com/doi/full/10.1080/21681015.2019.1576784
This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Production Research on 16/01/2018, available online: http://www.tandfonline.com/10.1080/00207543.2018.1425018
The regional innovation systems (RIS) concept has become popular among academics, political decision-makers and regional stakeholders of innovation. Understanding the competitive dynamics of RIS and their impact on regional competitiveness today has thus become a priority. This paper provides researchers, academics, political decision-makers and other interested parties with a map of the different approaches to RIS, aiding in the definition of new territorial innovation policies. With a co-citation resource approach, an extensive search of the Web of Science database was carried out and it encountered four clusters in the literature on RIS: regional knowledge systems; regional institutional systems; regional research and development systems; and regional network systems. This correspondingly sets out new theoretical perspectives based on bibliometric analysis techniques and new paths for scientific reflection and research.
“Bee pollen” is pollen collected from flowers by honey bees. It is used by the bees to nourish themselves, mainly by provid ing royal jelly and brood food, but it is also used for human nutrition. For the latter purpose, it is collected at the hive entrance as pellets that the bees bring to the hive. Bee pollen has diverse bioactivities, and thus has been used as a health food, and even as medication in some countries. In this paper, we provide standard methods for carrying out research on
bee pollen. First, we introduce a method for the production and storage of bee pollen which assures quality of the product.
Routine methods are then provided for the identification of the pollen’s floral sources, and determination of the more
important quality criteria such as water content and content of proteins, carbohydrates, fatty acids, vitamins, alkaloids, phen olic and polyphenolic compounds. Finally, methods are described for the determination of some important bioactivities of bee pollen such as its antioxidant, anti-inflammatory, antimicrobial and antimutagenic properties.
Intermittent rivers are prevalent in many countries across Europe, but little is known about the temporal evolution of intermittence and its relationship with climate variability. Trend analysis of the annual and seasonal number of zero-flow days, the
of dry spells and the mean date of the zero-flow events is performed on a database of 452 rivers with varying degrees of intermittence between 1970 and 2010. The relationships between flow intermittence and climate are investigated using the standardized precipitation evapotranspiration index (SPEI) and climate indices describing large-scale atmospheric circulation. The results indicate a strong spatial variability of the seasonal patterns of intermittence and the annual and seasonal number of zero-flow days, highlighting the controls exerted by local catchment properties. Most of
the detected trends indicate an increasing number of zero-flow days, which also tend to occur earlier in the year, particularly in southern Europe. The SPEI is found to be strongly related to the annual and seasonal zero-flow day occurrence in more than half of the stations for different accumulation times between 12 and 24 months. Conversely, there is a weaker dependence of river intermittence with large-scale circulation indices.
Overall, these results suggest increased water stress in intermittent rivers that may affect their biota and biochemistry and also reduce available water resources.
Contaminação e toxicologia dos alimentos
The transition into the twenty-first century brought about important changes in society, including the areas of education and teaching. The establishment of the European Higher Education Area represents an effort to face these changes together in Europe. The changes in the teaching and learning models in higher education led to the institutional promotion of extensive interventions in order to alter the status quo that has prevailed for decades. The need for a cultural renewal of the teaching staff involved in higher education, attending to the centrality of student’s learning rather than knowledge per se, is also a challenge to be overcome. This study intends to highlight the central elements concerning the Bologna Process and the topics connecting the objec- tives and their intrinsic principles. This initial approach is the basis for the design of a proposal for monitoring the implementation of the Bologna Process in an institution of higher education in Portugal. The results suggest a proposal consistent with the needs in terms of monitoring the implementation of the Bologna Process. This proposal allows, in addition to static analysis relative to a specific academic year, dynamic analysis between academic years, uncovering best practices and areas for improvement.
The aim of this study is to model the growth samples of four varieties (White, Black, Partridge,
Franciscan) of Spanish Utrerana hen breed, which is endangered, by using Brody, Von
Bertalanffy, Verhulst, Logistic and Gompertz models. For this purpose, a total of 16,235 weight
data observations from 2004 animals reared in free range system were collected. Logistic was
the best suited model for predicting the biological growth curve of White variety in both sexes,
while Von Bertalanffy was the best fitting model for the rest of individuals of the breed, based
on the 5 goodness-of-fit and flexibility criteria: Pseudo-R2
, mean squared error, Akaike information criterion, Bayesian information criterion and the biological coherence of the estimated
parameters. Black variety was the heaviest, with values of 2605.96 and 2032.61 g (for males and
females, respectively) for a parameter, while White variety presented the lowest maturity weight
(a ¼ 2442.99 and 1874.24 g, for males and females, respectively). Conclusively, this growth characterisation is essential for the conservation of the Utrerana hen, to search for new market
niches and a greater profitability to this differentiated product.
This article is an explanation based on the bibliography of the specialties of communication design, Corporate Visual Identity, ergonomics and visual perception of graphic signs, with the intention of increasing communicational efficiency in designers' work.
Based on the assumptions of perceptual efficiency, ergonomics and symbolic, graphic brands are contextualized as strategic elements of Corporate Visual Identity.
The globalized knowledge society for the information that surrounds the Internet on a global scale, the cultural changes and technological developments appear to facilitate that the design of symbols creates problems in a semantic, perceptual and ergonomic dimension. In particular, new digital media seem to foster graphic solutions with a strong mesmerizing power, but moving at a pace that the evolution
