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Ocorrência de Costalimaita lurida (Lefévre 1891) (Coleoptera: Chrysomelidae) em Eucalyptus spp. em Minas Gerais Occurrence of Costalimaita lurida (Coleoptera: Chrysomelidae) in Eucalyptus spp. in Minas Gerais state, Brazil
Alexandre Arnhold,Dinarte Gon?alves
Pesquisa Florestal Brasileira , 2010, DOI: 10.4336/2012.pfb.63.257
Abstract: Chrysomelids are important pests in forest plantations because they cause injuries and affect tree growth. Among the chrysomelid, Eumolpinae subfamily presents the greatest number of species recorded as pest. The purpose of this study was to register the occurrence and evaluate the attack of Costalimaita lurida (Lefévre, 1891) in a plantation of Eucalyptus spp. in the northern of Minas Gerais state. The attack was observed in September 2006 on a twelve months old plantation of age with the following species being injuried: Eucalyptus grandis, E. saligna, E. urophylla, E. robusta, a hybrid of E. grandis and E. urophylla and also Corymbia torelliana. doi: 10.4336/2010.pfb.30.63.257 Coleópteros da família Chrysomelidae s o importantes pragas no Brasil por causarem injúrias e afetarem o crescimento das árvores. Dentre os crisomelideos, a subfamília Eumolpinae possui maior número de espécies registradas como pragas. O objetivo deste estudo foi registrar a ocorrência e avaliar o ataque de Costalimaita lurida (Lefévre, 1891) em um plantio de Eucalyptus spp. no norte de Minas Gerais. O ataque foi observado em setembro de 2006, em plantio com 12 meses de idade, com as seguintes espécies injuriadas: Eucalyptus grandis, E. saligna, E. urophylla, E. robusta, um híbrido entre E. grandis e E. urophylla e também Corymbia torelliana.
Rank-ordering coefficients of variation for popping expansion
Arnhold, Emmanuel;Milani, Klayton Flávio;
Acta Scientiarum. Agronomy , 2011, DOI: 10.4025/actasciagron.v33i3.11911
Abstract: the coefficient of variation (cv) has been the most important statistic to determine the precision of experimental errors, but an even classification for guiding popcorn breeders is still lacking for popping expansion. the normality of data from 50 cvs was tested through the shapiro-wilk test, and the mean (m), median, standard deviation (sd), maximum and minimum values, asymmetry and kurtosis were all determined using the momentum method. the cvs were ranked as low [cv < (m - 1 sd)], moderate [(m - 1 sd) < cv < (m + 1 sd)], high [(m + 1 sd) < cv < (m + 2 sd)] and very high [cv > (m + 2 sd)]. in summary, these data were close to the normality because the slight and flattened curve was skewed to the right. the cv's mean was 11.08, the median was 11.94 and the standard deviation was 5.13%. accordingly, values of cv < 5.95% are low, 5.95 < cv < 15.21% are moderate, 15.21 < cv < 20.34% are high, and cv > 20.34% are very high
Rank-ordering coefficients of variation for popping expansion = Classifica o de coeficientes de varia o para capacidade de expans o
Emmanuel Arnhold,Klayton Flávio Milani
Acta Scientiarum : Agronomy , 2011,
Abstract: The coefficient of variation (CV) has been the most important statistic to determine the precision of experimental errors, but an even classification for guiding popcorn breeders is still lacking for popping expansion. The normality of data from 50 CVs was testedthrough the Shapiro-Wilk test, and the mean (m), median, standard deviation (SD), maximum and minimum values, asymmetry and kurtosis were all determined using the momentum method. The CVs were ranked as low [CV < (m - 1 SD)], moderate [(m - 1 SD) < CV < (m + 1 SD)], high [(m + 1 SD) < CV < (m + 2 SD)] and very high [CV > (m + 2 SD)]. In summary, these data were close to the normality because the slight and flattened curve was skewed to the right. The CV fs mean was 11.08, the median was 11.94 and the standard deviation was 5.13%. Accordingly, values of CV . 5.95% are low, 5.95 < CV . 15.21% are moderate, 15.21 < CV . 20.34% are high, and CV > 20.34% are very high. O coeficiente de variacao (CV) tem sido o parametro estatistico mais importante para determinar a precisao de erros experimentais, sendo necessaria uma classificacao para orientar os pesquisadores de milho-pipoca para a capacidade de expansao. Assim, a normalidade de 50 CVs foi avaliada por meio do teste de Shapiro-Wilk; a media (m), mediana, desvio padrao (DP), valores maximos e minimos, assimetria e curtose foram estimados utilizando o metodo dos momentos. Os CVs foram classificados como baixo [CV < (m - 1 DP)], moderado [(m - 1 DP) < CV < (m + 1 DP)], alto [(m + 1 DP) < CV < (m + 2 DP)] e muito alto [CV > (m + 2 DP)]. Em resumo, os dados aproximaram a normalidade e a curva normal foi desviada para a direita e ficou ligeiramente achatada. A media dos CVs foi de 11,08, a mediana foi de 11,94 e o desvio padrao foi de 5,13%. Assim, valores de CV . 5,95% devem ser classificados como baixos, 5,95 < CV . 15,21% sao moderados, 15,21 < CV . 20,34% saoelevados e CV > 20,34% sao muito elevados.
Learning Driver-Response Relationships from Synchronization Patterns
R. Quian Quiroga,J. Arnhold,P. Grassberger
Physics , 1999, DOI: 10.1103/PhysRevE.61.5142
Abstract: We test recent claims that causal (driver/response) relationships can be deduced from interdependencies between simultaneously measured time series. We apply two recently proposed interdependence measures which should give similar results as cross predictabilities used by previous authors. The systems which we study are asymmetrically coupled simple models (Lorenz, Roessler, and Henon models), the couplings being such as to lead to generalized synchronization. If the data were perfect (noisefree, infinitely long), we should be able to detect, at least in some cases, which of the coupled systems is the driver and which the response. This might no longer be true if the time series has finite length. Instead, estimated interdependencies and mutual cross predictabilities depend strongly on which of the systems has a higher effective dimension at the typical neighborhood sizes used to estimate them, and causal relationships are more difficult to detect. We also show that slightly different variants of the interdependence measure can have quite different sensitivities.
Genetic parameters of growth and survival in Acacia saligna shrubs
Mora,Freddy; Perret,Sandra; Scapim,Carlos Alberto; Arnhold,Emmanuel;
Ciencia e investigación agraria , 2010, DOI: 10.4067/S0718-16202010000200001
Abstract: acacia species have valuable agronomic characteristics, such as the tolerance to unfavorable environmental conditions. in this study, genetic parameters and selection response in acacia saligna shrubs were investigated in two arid environments of northern chile: cuz-cuz and el tangue. the quantitative traits were assessed in 5 year-old shrubs. a bayesian approach, implemented using gibbs sampling algorithm, was used in the data analysis. the tree survival was 87.3% and 81.8% in cuz-cuz and el tangue, respectively, confirming the potential of a. saligna in northern chile. the estimates of posterior mode of the heritability ranged from h2=0.13 (survival) to h2=0.25 (shrub crown diameter). estimated genetic gain (individual tree selection) ranged from 6 to 14% (selection intensity of 20%). bayesian credible intervals (p=95%) for genotype-environment correlations included zero, indicating a significant interaction for survival, crown diameter and height. shrub selection in multipurpose planting will depend on optimizing economical traits by selecting genotypes that perform well on a particular environment.
Características tecnológicas de genótipos de trigo (Triticum aestivum L.) cultivados no cerrado
Gutkoski, Luiz Carlos;Klein, Bruna;Pagnussatt, Fernanda Arnhold;Pedó, Ivone;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000300027
Abstract: the aim of this study was to investigate the characteristics of flour extraction grade, protein content, falling number, alveography, farinography, specific volume and point score of bread made from samples of grain of wheat genotypes grown in the brazilian cerrado. samples of wheat grains of genotypes embrapa 22, embrapa 42, ?nix, taurum and fundacep 27, grown in the brazilian cerrado, 2003/2004 crop, were disposed in fully randomized design, in the cereal laboratory at the centro de pesquisa em alimenta??o of the university of passo fundo. the results were analyzed by variance analysis and the means compared by tukey's test at 5% error probability. the wheat cultivars were classified according to alveography and falling number in improved, bread and bland. in the wheat cultivars classified as improved the results of the bread's functional properties were lower, which defines the use of flour from improvement wheat for blending with wheat with smaller gluten power. it is possible to grow improved wheat in the brazilian cerrado.
Efeito do teor de amido danificado na produ??o de biscoitos tipo semi-duros
Gutkoski, Luiz Carlos;Pagnussatt, Fernanda Arnhold;Spier, Franciela;Pedó, Ivone;
Ciência e Tecnologia de Alimentos , 2007, DOI: 10.1590/S0101-20612007000100021
Abstract: the objective of this research was to study the damage starch of wheat flour which occurred in the milling process and its effect in the production of sugar-snap cookie type. samples of the wheat by cultivars br 23, brs angico and rubi, with different hardness were milled in a roller-mill through a passage for the break system; a break and three reductions in the 16% of moisture, a break and three reductions in the 12% of moisture. in this treatment, the milling was complemented using a ball-mill. the flours were analyzed with respect to physical, chemistry, rheology and functional characteristics, using a 3 x 3 factorial design totalizing nine treatments. the results were analyzed using an analysis of variance and the averages of the significant models were compared by the tukey test at 5% of probability. the results of break yield, protein, damaged starch, work input (w x 10-4j) and relation extensibility/tenacity (p/l) indicate that the flour by cultivar brs angico presented better characteristics for the produce of cookies, followed by br 23 and ruby. the damaged starch produced during the milling of the wheat influenced the functional properties of cookies showing better results than those obtained using one passage by the break system.
Yield and combining ability of maize cultivars under different ecogeographic conditions
Adilson Deitos,Emmanuel Arnhold,Freddy Mora,Glauco Vieira Miranda
Crop Breeding and Applied Biotechnology , 2006,
Abstract: The objective of this study was to evaluate the yield and combining ability of maize cultivars (AG4051, AL30,AL25, D270, D170, and AG1051) in contrasting environments. The trials were conducted in the growing season 2002/2003,in Vi osa, Capinópolis and Florestal, state of Minas Gerais. The effects of hybrids were significant by the F test, as well astreatments x environments, hybrid combinations x environments, and controls x environments. This indicates the possibilityof increasing the yield in these regions by capitalizing on the genotype x environment interaction, by selecting and recombiningcultivars for each site. Among the cultivars and their hybrid combinations, AG1051 and AG4051 x AL30, respectively,performed best in the mean of the three locations. The most indicated combinations for each site were: AG4051 X AL30 andAL30 X D270 in Vi osa, AG4051 X AL25 and AL30 X D170 in Florestal and, D170 x AG4051 and AL25 x D270 inCapinópolis.
Sele o de linhagens S5 de milho-pipoca com base em desempenho e divergência genética = Selection of popcorn s5 inbred lines based on performance and genetic divergence
Emmanuel Arnhold,Ricardo Gon?alves Silva,José Marcelo Soriano Viana
Acta Scientiarum : Agronomy , 2010,
Abstract: O objetivo deste trabalho foi selecionar famílias S5 de milho-pipoca com base na divergência genética e no desempenho per se. Foram avaliadas 144 famílias S5, obtidas da popula o Beija-flor. O experimento foi instalado em Vi osa, na safra 2002/2003, no delineamento em blocos aumentados, com as testemunhas IAC 112 e Zélia, intercaladas a cada dez famílias. A divergência genética foi predita pelo método de otimiza o de Tocher, utilizando a distancia generalizada de Mahalanobis. Foram formados 23 grupos. Dentro de cada grupo, estipularam-se pontos de corte para índice de prolificidade (≥ 1), peso de 100 gr os (≤ 15 g) e rendimento de gr os (≥ 1.000 kg ha-1). As famílias restantes dentro de cada grupo foram selecionadas em capacidade de expans o. Assim, foram selecionadas 23 famílias, que podem ser utilizadas no melhoramento populacional na forma o de sintéticos, ou em futuros cruzamentos. A sele o de famílias com base na diversidade genética e em desempenho per se foi eficiente, sendo possível selecionar famílias divergentes e, em geral, com excelentes características agron micas, como capacidade de expans o média de30,67 mL g-1 e produtividade média de 1.897,69 kg ha-1. The objective of this work was to select S5 families of popcornbased on their genetic divergence and performance. The study evaluated 144 S5 families, obtained from the Beija-flor population. The experiment was conducted in Vi osa, during the 2002/2003 crop season, in an augmented block design, with the controls IAC 112 and Zélia inserted every 10 families. The genetic divergence was predicted using Tocher's optimization method, based on the Mahalanobis distance. Twenty-three groups were formed. Within each group formed, points were prescribed for cutting prolificity index (≥ 1), weight of a hundred grains (≤ 15) and yield (≥ 1,000 kg ha-1). Twenty-three families were selected for popping expansion, which can be used in population breeding to synthesize synthetic varieties, or advancing the breeding process for subsequent hybrid crosses. The selection of families based on their genetic diversity and performance was quite efficient. Different families with excellent agronomic characteristics, as popping expansion average of 30.67 mL g-1 and yield of 1,897.69 kg ha-1, were selected.
Análise do crescimento de árvores de sete anos de idade, originadas de estacas e sementes de Pinus radiata D. Don, provenientes de gera o avan ada de melhoramento. Growth analysis of rooted cuttings and seedling trees at seven years old from an improvement advanced generation of Pinus radiata D. Don.
Freddy MORA,Adilson DEITOS,Emmanuel ARNHOLD,Thatiana Silva DANDOLINI
Revista do Instituto Florestal , 2005,
Abstract: árvores originadas de estacas enraizadasde Pinus radiata D. Don provenientes de ortets deum ano de idade foram comparadas com árvoresprovenientes de sementes em dois locais do Sul doChile, aos sete anos de idade, para as característicasde altura, diametro e volume, e baseado em umaavalia o subjetiva para diametro dos galhos eretid o do tronco. Em geral, as árvores originadasde estacas cresceram tanto quanto as árvoresprovenientes de sementes e demonstraram vantagensem rela o à retid o do tronco e menor diametrode galhos. Entretanto, n o foram encontradasdiferen as significativas entre os dois grupos deárvores para todas as características avaliadas. Atéo presente momento, tais resultados indicam que aprodu o de plantas via estacas enraizadas podeser um método útil para estabelecimento deplanta es comerciais da espécie.Pinus radiata D. Don rooted cuttingstrees from one-year-old ortets were compared withseedlings at two sites in southern Chile, at sevenyears old, for total height, stem diameter, stemvolume, and a subjective assessment for stemstraightness and relative diameter of the branches.In general, cuttings from one-year-old donor treesgrew as tall as or taller than the seedlings, anddemonstrated advantageous characteristics such assuperior stem straightness and small relativediameter of the branches, compared with seedlingsof equivalent genetic quality. Nevertheless, nodifferences were found between stock types in anyof measured characteristics at seven years afterestablishment. At the moment, with these results,plants production via rooted cuttings can be anuseful method for establishment of Pinus radiataoperational plantation.
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