1,720,960 research outputs found
Variation of polyphenol and vitamin C fruit content induced by strawberry breeding
No full textThe modification of the lifestyle in modern society has underlined new crucial aspects from the nutritional point of view. Among fruits, strawberry received in the last years an increasing attention, and a growing number of scientific evidence demonstrated how a short-or a long-term consumption of strawberries could be beneficial for the consumers. The nutritional properties of strawberry depend on the amount and the profile of the bioactive and antioxidant compounds it contains (e.g., polyphenols and vitamins). The recent aim of different breeding programs is to select new strawberry cultivars having fruit with high concentrations of antioxidant compounds. In this study, 14 commercial cultivars and 5 advanced selections from the UNIVPM-D3A breeding program have been deeply evaluated for their nutritional quality for three consecutive years, from 2016 to 2018. The concentration of the main bioactive compounds, such as anthocyanins, phenolic acids, and vitamin C, were measured through HPLC-UV. Results demonstrate the high variability in bioactive compounds composition among cultivars and breeding materials and the possibility to generate new cultivars producing fruit with high contents of polyphenols and vitamins, stable at the different cultivation cycles, to be labelled with a compositional claim
Influence of different storage conditions on strawberry fruit nutritional quality
No full textStrawberries are considered as a very rich source of bioactive compounds (vitamin C and B9) and phenolic compounds (phenolic acids, flavonoids and anthocyanins). Moreover, the total antioxidant capacity (TAC), which measures the radical scavenging activity, is related to the amount of antioxidant compounds in strawberries and is a good parameter for indicating fruit nutritional quality. Unfortunately, strawberries are highly perishable fruits, and their perishable nature can lead both to physical damage and chemical degradation during storage, which causes a great loss of the phytochemical compounds pattern. For these reasons, strawberry is usually consumed as fresh fruit or after few days of storage, but in some cases, it is necessary to store fruits for longer time. Today, with remarkable advancement in postharvest technology and food engineering, many effective techniques are developed to maintain the original qualities. In this study, we were applying different cold storage temperature (-20 and -80°C) on whole fruit of three strawberry genotypes ('Arianna', 'Francesca' and 'Silvia') for up to six months, and evaluating the influence of different storages condition and length on the preservation of fruit content of nutritional compounds. The concentration of the main bioactive compounds, such as anthocyanins and vitamin C, were measured through HPLC-UV. Results demonstrated that, as expected, there is a difference in the fruit nutritional quality of different cultivars. Furthermore, there is a decline in the phytochemical pattern of the fruits with the prolongation of the storage time. Fruit phytochemicals content was also affected by the storage temperature. These results are important in order to better plan fruit storage conditions and time in order to maintain the better fruit nutritional quality
The effect of different nitrogen fertilizations rate on fruit production and qualitative properties of three peach cultivars
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Physicochemical characterization of eighteen peach cultivars grown in the Mid-Adriatic area
No full textPeach is the species with the highest number of new cultivars licensed on the market. The genetic improvement of peach is focusing on multiple productive and quality aspects, even if the very high availability of cultivars with very different characteristics tends to confuse the producer when choosing a cultivar for a new orchard. The purpose of this study is to evaluate the varietal collection present in a farm located in the Mid-Adriatic area, in the Marche region (Italy), in order to explore at least in part, the variability of the peach market in this area and to investigate which cultivar presents fruits with the most interesting characteristics. The trial was carried out in 2020 year, and a total of 18 cultivars were involved (comprising both peaches and nectarines). To evaluate the fruit quality, the main physicochemical parameters (overcolor, caliber, firmness, soluble solids and titratable acidity content) were considered. The obtained results indicated that there is a great variability within the collection for the tested parameters, but some traits seems to be in some way related, as early ripening cultivars are usually associated with higher overcolor percentage, while some other cultivars stand out for the high fruit weight and sugar/acid ratio (‘Lady Erica’ and ‘Gea’) or for low sugar/acid ratio (‘Extreme Late’ and ‘Orion’). In conclusion, it is clear that both the consumers and the growers have a great possibility of choice among the available cultivars
Preliminary results of soilless cultivated strawberry cultivars in the autumn-spring cycle in the mid-Adriatic area
No full textStrawberry is a fruit appreciated and consumed all year round; however, availability is different according to the season and there is significant variation in price between seasonal and out-of-season fruits. Italian production, in particular in the central regions, is concentrated in the spring (April and May) through a single-cropping system. This results in a lower fruit price as a result of the high market supply. The autumn months (October and November) are therefore, very interesting because the high demand results in a significant increase in prices, almost three times higher than spring prices. The aim of this work is to investigate the production and quality of June-bearing strawberry cultivars in autumn-spring soilless cultivation. The study was conducted on a farm located in the Marche region, in central Italy, to test the productive and qualitative response of the following June-bearing cultivars: 'Clery', 'Aurea', 'Asia', 'Sibilla', and 'Tea'. Results confirmed the adaptability to soilless and autumn-spring cultivation of the cultivars tested. The autumn harvest is characterised by lower yield but with higher fruit quality than the spring harvesting period. 'Asia' and 'Sibilla' showed the highest yield in the autumn, whilst 'Clery' fruits had the highest organoleptic quality in both harvesting periods. This autumn-spring soilless cultivation system offers interesting opportunities to farmers for covering a longer period in the out-of-season market
Generating novel strawberry pre-breeding material from a Fragaria × ananassa backcrossing program with F. virginiana subsp. glauca inter-specific hybrids
No full textStrawberry (Fragaria × ananassa) breeding programs focus on increasing plant resilience and fruit nutritional quality. Wild octoploid strawberry (F. virginiana and F. chiloensis) are very important sources of genes for increasing disease resistance, fruit quality, and bioactive compounds, in particular vitamins and polyphenols. These compounds contribute to the strawberry fruit antioxidant capacity and, consequently, for the many health benefits of strawberry consumption. Inter-specific crossing of the commercial Fragaria × ananassa with wild species broadened the gene pool to obtain new pre-breeding material with improved plant and fruit characteristics. This study performed different backcross generations between F. × ananassa and F. virginiana subsp. glauca with the aim of identifying the minimum number of generations needed to produce new pre-breeding materials which would combine new interesting traits nearer to obtain high production amount, high sugar content, and high fruit firmness that are now requested at commercial level
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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