1,720,965 research outputs found
Effect of Processed Calcite Particles on Apricot Cationic Nutrition and Fruit Quality.
No full textWe reported the preliminary results on the effects of processed calcite
particles (PCP), applied at stage II and III of fruit development, on leaf cationic
nutrition and some physical and chemical characteristics of apricot fruits (Prunus
armeniaca L.). Approximately 30, 40, 50 days after bloom, 20 trees trained to vase
were randomly chosen in a 10-year old orchard, located in the Middle Rhône Valley
of France, sprayed with 1.5 kg/ha suspended in 100 L of water of PCP and compared
with unsprayed trees. Fruit weight and diameter were measured from fruit set
(April 18, 2007) to 3 days before harvest (May 16, 2007). Potassium, calcium and
magnesium were determined by spectrochemical analysis by atomic absorption and
emission in accordance with the IAOPN protocols on leaves and fruit sampled from
1 week before treatment, 1 and 3 weeks after application. Fruit harvested at the last
picking were also analyzed for total soluble solids, titrable acidity, pH of the fruit
juice. A sample of 20 fruits was stored in a cold room and daily observed for postharvest
physiological disorders or pathogens cropped out.
The application of PCP had no significant effect on apricot fruit growth,
assessed as fruit diameter. However, the results obtained show that treated plants
have nitrogen and cationic contents, in both leaves and fruits, closer to the standard
reference levels of this region compared to untreated plants. Apricot fruits from PCP
treatment showed higher total soluble solids and lower titratable acidity. Moreover,
treated fruits showed a lower susceptibility to post-harvest physiological disorder or
pathogen attacks
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
WATER STRESS IN TANNAT AND DURAS GRAPEVINE CULTIVARS (VITIS VINIFERA L.): LEAF PHOTOSYNTHESIS AND GRAPE PHENOLIC MATURITY
No full textOur study focuses on the physiological responses and berries phenolic maturity
of Tannat and Duras red wine grape cultivars, which are autochthonous from
the southern France, under water stress condition from pre-véraison to harvest
by limiting water availability to 30% of the control well-watered. Methode and
result : Predawn and midday leaf water potentials served as an indicator to
maintain water stress level compared to the control. The seasonal reduction of
leaf net assimilation rate under saturating irradiance (An) under water stress
over six weeks stress period versus well-watered was 60% for Tannat and
Duras as compared to 64 and 46% for leaf stomatal conductance (gs) for Tannat
and Duras cultivars respectively. These responses qualify Tannat as a good
candidate for adapting to limited water availability. For both Tannat and Duras
cultivars, relationships between the fresh mass, skin and flesh in six different
berry size categories, ranged from about 0.5 to 2.0 g, were assessed on ripe
fruit from grapevines subjected to well-watered and water stressed treatments.
Fresh mass components for both treatments varied significantly depending on
the grape cultivar and water availability. Tannat showed that seed represented
around 6%, skin around 12%, and flesh about 82% of the berry total fresh
weight. The Duras cultivar showed that seed represented around 3%, skin
around 12% and flesh around 85%. Exact proportion of seed, skin and flesh
varied according to berry size category. There was an increase in total seed
mass per berry to water stress treatment. Anthocyanin content and the seed
tannin concentration varied depending on the grape variety and water stress
treatment. In comparison with skin tannin or anthocyanin content, seed tannin
varied more with berry size and less with vine water status. Tannat variety
showed a positive effect of water stress on anthocyanin content but not Duras.
At last, seed and skin tannin concentrations decreased with berry fresh weight
Variations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Effetto della disponibilita’ idrica sulla risposta eco-fisiologica e sulle caratteristiche dell’acino di quattro varieta’ autoctone della regione di “Midi-Pyrénées” in Francia.
No full textIn due successive stagioni vegetative è stato studiato l’effetto dello stress idrico su alcune caratteristiche eco-fisiologiche e morfologiche dell’acino di quattro varietà di vite: Côt (=Malbec), Négrette, Tannat e Duras; autoctone dell’area Sud-Ovest della Francia (Regione “Midi-Pyrénées”).
All’inizio dell’invaiatura su metà delle piante di ciascuna varietà, secondo uno schema completamente randomizzato, è stato imposto uno stress idrico diminuendo del 70% i volumi irrigui utilizzati per il controllo. Dopo sei settimane, la diminuzione delle disponibilità idriche ha comportato un abbassamento, rispetto alle piante irrigate, della conduttanza stomatica e
dell’assimilazione massima. La distribuzione del peso fresco dell’acino, misurata in 6 diverse categorie di dimensione degli acini, ha messo in evidenza un significativo aumento delle categorie di acino con peso inferiore ad 1.0 g nelle piante sottoposte a stress idrico rispetto a quelle ben irrigate. Gli acini sottoposti a stress idrico avevano inoltre un maggior peso relativo dei semi rispetto a buccia e polpa. La concentrazione in antociani e tannini della buccia non è stata significativamente modificata dal trattamento irriguo in Côt, Négrette mentre significativamente più elevata è stata in Tannat e Duras. La concentrazione di tannini dei semi è stata influenzata dal trattamento irriguo in relazione alla cultivar ed alla dimensione dell’acino. In definitiva la concentrazione dei tannini dei semi e della buccia decresce con l’aumentare del peso fresco dell’acino, mentre la concentrazione gli antociani della buccia è meno influenzata dalle dimensioni dell’acino e positivamente associata al deficit idrico
- …
