140 research outputs found
Influence of Soil and Irrigation Management on the Quality of Seedless Crimson Table Grapes
The market for table grapes is moving into mass production of specialty seed-less
grapes in covered areas, aiming at obtaining premium prices with early or late
production of high quality products. Production of quality seedless grapes is not
straightforward since it is requires the correct combination of various independent
characteristics, such as color, sugars, size and quantity at the right moment for
successful harvesting and marketing. The present study was carried out at the two
largest Portuguese producers located in Alentejo, and has the objective of studying the
effect of irrigation management strategies and two different soils on the various
relevant parameters for successful production and marketing. The management
strategies were the application of ten day stress at the end of the cycle, in order to
promote early maturing of the grapes.
Three different timings of the stress were applied. Soil moisture, sap flow, bark
thickness, as well as leaf water potential, stomatal conductance and chlorophyll content
were measured regularly during the production season. The results indicate that the
roots explore a rather large soil volume and the plants can successfully withstand
reasonable periods of drought without significant changes to the plant physiology.
Additionally late rains can mask the effect of any farmer applied drought and invalidate
any farmer induced stress to the plants. Water-logged soils tend to cause early onset of
maturity, but cause the ripening stage to extend over a longer period of time, and thus,
in effect result in a delay in the harvest date. Topography also has some effect on the
ripening, since hot air tends to accumulate under the plastic at the higher areas of the
field.
This work is funded by PRODER, 4.1, within the scope of project MORECRIMSO
DesequilĂbrios genĂŽmicos na cardiopatia congĂȘnita sindrĂŽmica
To identify pathogenic genomic imbalances in patients presenting congenital heart disease (CHD) with extra cardiac anomalies and exclusion of 22q11.2 deletion syndrome (22q11.2 DS). Methods: 78 patients negative for the 22q11.2 deletion, previously screened by fluorescence in situ hybridization (FISH) and/or multiplex ligation probe amplification (MLPA) were tested by chromosomal microarray analysis (CMA). Results: Clinically significant copy number variations (CNVs â„300. kb) were identified in 10% (8/78) of cases. In addition, potentially relevant CNVs were detected in two cases (993. kb duplication in 15q21.1 and 706. kb duplication in 2p22.3). Genes inside the CNV regions found in this study, such as IRX4, BMPR1A, SORBS2, ID2, ROCK2, E2F6, GATA4, SOX7, SEMAD6D, FBN1, and LTPB1 are known to participate in cardiac development and could be candidate genes for CHD. Conclusion: These data showed that patients presenting CHD with extra cardiac anomalies and exclusion of 22q11.2 DS should be investigated by CMA. The present study emphasizes the possible role of CNVs in CHD. © 2017 Sociedade Brasileira de Pediatria.To identify pathogenic genomic imbalances in patients presenting congenital heart disease (CHD) with extra cardiac anomalies and exclusion of 22q11.2 deletion syndrome (22q11.2 DS). Methods: 78 patients negative for the 22q11.2 deletion, previously screen935497507FAPESP - FUNDAĂĂO DE AMPARO Ă PESQUISA DO ESTADO DE SĂO PAULOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTĂFICO E TECNOLĂGICO2008/10596-0, 2008/50421-4, 2009/08756-1, 2011/23794-7149600/2010-0, 471422/2011-8; 471422/2011-8; 2011/23794-7Identificar desequilĂbrios genĂŽmicos patogĂȘnicos em pacientes que apresentam cardiopatias congĂȘnitas (CC) e anomalias extracardĂacas e exclusĂŁo da sĂndrome de deleção 22q11.2 (SD22q11.2). Foram avaliados por microarray cromossĂŽmico (CMA) 78 pacientes neg
O desenvolvimento do psiquismo na vida cotidiana: aproximaçÔes entre a psicologia de Alexis N. Leontiev e a teoria da vida cotidiana de Agnes Heller
NEOTROPICAL XENARTHRANS: a data set of occurrence of xenarthran species in the Neotropics
Xenarthrans â anteaters, sloths, and armadillos â have essential functions for ecosystem maintenance, such as insect control and nutrient cycling, playing key roles as ecosystem engineers. Because of habitat loss and fragmentation, hunting pressure, and conflicts with 24 domestic dogs, these species have been threatened locally, regionally, or even across their full distribution ranges. The Neotropics harbor 21 species of armadillos, ten anteaters, and six sloths. Our dataset includes the families Chlamyphoridae (13), Dasypodidae (7), Myrmecophagidae (3), Bradypodidae (4), and Megalonychidae (2). We have no occurrence data on Dasypus pilosus (Dasypodidae). Regarding Cyclopedidae, until recently, only one species was recognized, but new genetic studies have revealed that the group is represented by seven species. In this data-paper, we compiled a total of 42,528 records of 31 species, represented by occurrence and quantitative data, totaling 24,847 unique georeferenced records. The geographic range is from the south of the USA, Mexico, and Caribbean countries at the northern portion of the Neotropics, to its austral distribution in Argentina, Paraguay, Chile, and Uruguay. Regarding anteaters, Myrmecophaga tridactyla has the most records (n=5,941), and Cyclopes sp. has the fewest (n=240). The armadillo species with the most data is Dasypus novemcinctus (n=11,588), and the least recorded for Calyptophractus retusus (n=33). With regards to sloth species, Bradypus variegatus has the most records (n=962), and Bradypus pygmaeus has the fewest (n=12). Our main objective with Neotropical Xenarthrans is to make occurrence and quantitative data available to facilitate more ecological research, particularly if we integrate the xenarthran data with other datasets of Neotropical Series which will become available very soon (i.e. Neotropical Carnivores, Neotropical Invasive Mammals, and Neotropical Hunters and Dogs). Therefore, studies on trophic cascades, hunting pressure, habitat loss, fragmentation effects, species invasion, and climate change effects will be possible with the Neotropical Xenarthrans dataset
Mineralogia e cristalografia da fração argila de horizontes coesos de solos nos tabuleiros costeiros
Dynamical mechanism for sharp orientation tuning in an integrate-and-fire model of a cortical hypercolumn
Orientation tuning in a ring of pulse-coupled integrate-and-fire (IF) neurons is analyzed in terms of spontaneous pattern formation. It is shown how the ring bifurcates from a synchronous state to a non-phase-locked state whose spike trains are characterized by clustered but irregular fluctuations of the interspike intervals (ISIs). The separation of these clusters in phase space results in a localized peak of activity as measured by the time-averaged firing rate of the neurons. This generates a sharp orientation tuning curve that can lock to a slowly rotating, weakly tuned external stimulus. Under certain conditions, the peak can slowly rotate even to a fixed external stimulus. The ring also exhibits hysteresis due to the subcritical nature of the bifurcation to sharp orientation tuning. Such behavior is shown to be consistent with a corresponding analog version of the IF model in the limit of slow synaptic interactions. For fast synapses, the deterministic fluctuations of the ISIs associated with the tuning curve can support a coefficient of variation of order unity.<br/
Composição bromatolĂłgica de trĂȘs leguminosas anuais de estação fria adubadas com fĂłsforo e potĂĄssio
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