|
|
|
| Registros recuperados: 122 | |
|
|
| Abbud,C.M.M.; Cruz,A.A.V.. |
| The Vernier acuity of 50 normal untrained subjects (20 males and 30 females) was measured by the method of adjustment. Subjects were divided into five age ranges with 10 subjects in each age group: 5-10, 11-20, 21-30, 31-40, and 41-50 years. All subjects had normal visual acuity (20/20) and volunteered to participate in the experiment. Children were selected from a local school and adults recruited from the technical staff of the Department of Ophthalmology of the School of Medicine. Vernier acuity was higher in adults compared to children. Intraindividual variability was high and it was estimated that for most individuals of all age groups a range of 100 to 700 trials was necessary to obtain a mean with a precision of 10%. These results suggest that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vernier acuity; Variability; Age. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000200011 |
| |
|
|
| Amorim,Edson P.; Vilarinhos,Alberto D.; Cohen,Kelly O.; Amorim,Vanusia B.O.; Santos-Serejo,Janay A. dos; Silva,Sebastião Oliveira e; Pestana,Kátia N.; Santos,Vânia J. dos; Paes,Norma S.; Monte,Damares C.; Reis,Ronaldo V. dos. |
| The aim of this work was to evaluate the carotenoid content and genetic variability of banana accessions from the Musa germplasm collection held at Embrapa Cassava and Tropical Fruits, Brazil. Forty-two samples were analyzed, including 21 diploids, 19 triploids and two tetraploids. The carotenoid content was analyzed spectrophotometrically and genetic variability was estimated using 653 DArT markers. The average carotenoid content was 4.73 µg.g-1, and ranged from 1.06 µg.g-1 for the triploid Nanica (Cavendish group) to 19.24 µg.g-1 for the triploid Saney. The diploids Modok Gier and NBA-14 and the triploid Saney had a carotenoid content that was, respectively, 7-fold, 6-fold and 9-fold greater than that of cultivars from the Cavendish group (2.19 µg.g-1).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diploids; Germplasm; Molecular markers; Musa sp.; Variability. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100014 |
| |
|
|
| Baggio, Jacopo A.; Center for Behavior, Institutions and the Environment, Arizona State University; Department of Environment and Society, Utah State University; jbaggio@asu.edu; Rollins, Nathan D.; Center for Behavior, Institutions and the Environment, School of Human Evolution and Social Change, Arizona State University; nathan.rollins@asu.edu; Janssen, Marco A.; Center for Behavior, Institutions and the Environment, School of Sustainability, Arizona State University; Marco.Janssen@asu.edu. |
| Research on collective action and common-pool resources is extensive. However, little work has concentrated on the effect of variability in resource availability and collective action, especially in the context of asymmetric access to resources. Earlier works have demonstrated that environmental variability often leads to a reduction of collective action in the governance of shared resources. Here we assess how environmental variability may impact collective action. We performed a behavioral experiment involving an irrigation dilemma. In this dilemma participants invested first into a public fund that generated water resources for the group, which were subsequently appropriated by one participant at a time from head end to tail end. The amount of resource... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Asymmetry; Common-pool resources; Feedbacks; Laboratory experiments; Trust; Variability. |
| Ano: 2015 |
|
| |
|
|
| Baley, Christophe; Gomina, Moussa; Breard, Joel; Bourmaud, Alain; Davies, Peter. |
| Flax fibres are a promising reinforcement in the development of biocomposites and are finding new applications in transport structures. However, there is a perceived problem with plant fibres related to the variability of the properties of these natural materials. This paper describes the factors which affect variability, from plant growth conditions to fibre sampling and testing. A large number of test results are presented (characterization of elementary fibres, bundles, assemblies of bundles, and unidirectional composites), and it is shown that provided fibre supply is carefully controlled, characterization procedures are appropriate, and manufacturing processes are optimal then excellent composite properties can be achieved with low variability. |
| Tipo: Text |
Palavras-chave: Flax fibre; Composite; Variability; Mechanical properties. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00593/70488/68656.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Bevilaqua, Gilberto Antonio Peripolli; Antunes, Iraja Ferreira; Marques, Robson Luis Legorio; Maia, Manoel Souza. |
| A cultura do feijão-miúdo tem crescido em importância na região de clima temperado, principalmente em áreas da agricultura familiar, utilizando sistemas de base ecológica, visando a alimentação de ruminantes. Na região da planície costeira do Rio Grande do Sul a cultura apresenta grande desenvolvimento e tem se espalhado mais recentemente para outras áreas, no entanto sem informações técnicas sobre o seu manejo. A rusticidade da planta é reconhecida largamente, vegetando bem em solos mal drenados, arenosos e de baixa fertilidade, salinos e com baixa disponibilidade de água, sendo especialmente indicada como recuperadora de solo. Sua multiplicidade de usos tornou-a uma importante opção aos agricultores familiares, podendo ser utilizada além de recuperadora... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Vigna unguiculata; Fenologia; Variabilidade; Pastoreio; Leite; Fenology; Variability; Grazing; Milk; Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/109773 |
| |
|
|
| Boerema, Nicholas; Kay, Merlinde; MacGill, Iain. |
| This paper examines how key characteristics of the underlying wind and solar resources may impact on their energy value within the Australian National Electricity Market(NEM). Analysis has been performed for wind generation using half hour NEM data for South Australia over the 2008-9 financial year. The potential integration of large scale solar generation has been modelled using direct normal solar radiant energy measurements from the Bureau of Meteorology for six sites across the NEM. For wind energy, the level and variability of actual wind farm outputs in South Australia is analysed. High levels of wind generation in that State have been found to have a strong secondary effect on spot prices. Wind generation's low operating costs will see it displacing... |
| Tipo: Report |
Palavras-chave: Energy value; Integration; NEM; Solar; Variability; Wind; Environmental Economics and Policy; Resource /Energy Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/107740 |
| |
|
| |
|
|
| BRITO,I.P.F.S.; MARCHESI,B.B.; TROPALDI,L.; CARBONARI,C.A.; VELINI,E.D.. |
| ABSTRACT: This study aimed to assess the response of Urochloa decumbens plants to different doses of glufosinate ammonium, and the sensitivity of plant population to the herbicide. Two studies were conducted, both in greenhouse and repeated at different times. In the dose-response analysis, two experiments were conducted using seven doses of the glufosinate ammonium (0, 50, 100, 200, 400, 800, and 1,600 g a.i. ha-1) with four replications each. In the analysis of sensitivity levels of U. decumbens to herbicide, 44 plants were sprayed with a dose of 200 g a.i. ha-1 of the herbicide. Tissue ammonium content was determined, and injury percentage was visually assessed. Experiment data were converted to mg of ammonium per kg-1 of fresh mass and submitted to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Glutamine synthetase; Weed; Variability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100238 |
| |
|
|
| Cañadas-López,Álvaro Gustavo; Rade-Loor,Diana Yasbhet; Quijije-Pinargote,Raúl Ovidio; Sotomayor,Ignacio Antonio; Ormaza-Molina,Alexandra Maricela. |
| Abstract Tomato (Solanum lycopersicum L.) processing industry requires varieties with increased production and quality, and also with resistance to pest, in order for producers to cultivate these. The aim of this study was to carry out an evaluation of 112 tomato cultivars for production and quality characteristics from the following providers: Orsetti Seed, Heiz Seed, Ohio University, United Genetic and Harrys Moran. The experiment was conducted at the Experimental Research Station Portoviejo of INIAP. Statistical analyses used were principal components analysis for a group of112 cultivars based on production parameter: yield (t.ha-1), average fruit weight (g), number of fruits per plant, defective fruits per plant; in addition to quality parameters as:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Variability; Production; Quality; Paste; Food processing; Breeding program. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200347 |
| |
|
| |
|
|
| Castro,Domingos Augusto Mendonça; Costa,Tatiana Santos; Cardoso,Ariane Santos; Ramos,Helaine Christine Cancela; López,Jorge Alberto; Diniz,Leandro Eugenio Cardamone. |
| ABSTRACT Buriti (Mauritia flexuosa L.f), a palm tree native to South America and widely distributed in Brazil, displays significant ecological, economic and biotechnological importance. However, the disorderly extractivism and environmental degradation of its endemic areas are leading to reductions in, and/or extinction of the buriti palm tree, causing ecological imbalance with significant economic losses for rural communities and genetic diversity. Consequently, populational genetic diversity studies have become relevant as a strategy for conserving the species. Therefore, this study evaluated the genetic structure of 10 populations from the Lençóis Maranhenses region, in the state of Maranhão, Brazil, using microsatellite markers. Results indicated that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Buriti; SSR; Preservation; Diversity; Variability. |
| Ano: 2022 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162022000101101 |
| |
|
| |
|
|
| Couldrey, Matthew P.; Oliver, Kevin I. C.; Yool, Andrew; Halloran, Paul R.; Achterberg, Eric P.. |
| The North Atlantic is an important basin for the global ocean's uptake of anthropogenic and natural carbon dioxide (CO2), but the mechanisms controlling this carbon flux are not fully understood. The air-sea flux of CO2, F, is the product of a gas transfer velocity, k, the air-sea CO2 concentration gradient, Delta pCO(2), and the temperature-and salinity-dependent solubility coefficient, alpha, k is difficult to constrain, representing the dominant uncertainty in F on short (instantaneous to interannual) timescales. Previous work shows that in the North Atlantic, Delta pCO(2) and k both contribute significantly to interannual F variability but that k is unimportant for multidecadal variability. On some timescale between interannual and multidecadal, gas... |
| Tipo: Text |
Palavras-chave: Carbon flux; Gas transfer velocity; Carbon cycle; Ocean model; Climate dynamics; Variability. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00383/49418/49868.pdf |
| |
|
| |
|
| |
|
| |
|
| |
| Registros recuperados: 122 | |
|
|
|
