Consulta: creatorFacets:"Arnhold,Emmanuel"
Registros recuperados: 11
Data/hora: 02/06/2024 17:56:28

R-environment package for regression analysis
Provedor de dados: 86
Autores: Arnhold,Emmanuel.
Abstract: The objective of this work was to develop a package in the R environment for automating and facilitating the regression analysis. Named easyreg, the package offers five functions. The er1 function performs analyses in 13 models, including linear, nonlinear, and mixed models. The er2 function considers the lack of fit in the analyses and in the following designs: completely randomized, randomized complete block, Latin squares, and repeated Latin squares. The regplot function generates graphics; the bl function estimates two-segment models; and the regtest function tests the equality of parameters and the identity of the models. These functions allow of a great number of analyses and confer practicality and versatility to the regression analysis.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Data analysis; Equality of parameters; Experimental designs; Lack of fit; Mixed models; Model identity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700870

Compartimentos de carbono em latossolo vermelho sob cultivo de eucalipto e fitofisionomias de cerrado
Provedor de dados: 90
Autores: Alcântara Neto,Francisco de; Leite,Luiz Fernando Carvalho; Arnhold,Emmanuel; Maciel,Giovana Alcântara; Carneiro,Romero Francisco Vieira.
Os objetivos deste trabalho foram avaliar o impacto do cultivo do eucalipto, em diferentes idades, e de fitofisionomias de Cerrado sobre os estoques de C orgânico total e de seus compartimentos e verificar qual dessas frações constitui-se em indicador mais sensível às mudanças de uso do solo. O estudo foi realizado em Brasília, DF, em Latossolo Vermelho distroférrico sob plantio de eucalipto com três (PEUC-3), seis (PEUC-6) e sete (PEUC-7) anos de idade e sob Cerrado senso stricto, Cerrado denso e campo sujo. Nessas áreas, amostras de solo foram coletadas nas camadas de 0-10 e 10-20 cm, para determinação dos estoques de C orgânico total (COT), carbono da fração leve livre (FLL) e carbono das frações húmicas (ácidos fúlvicos - FAF, ácidos húmicos - FAH e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Matéria orgânica do solo; Substâncias húmicas; Florestas; Uso do solo.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300019

Influence of progesterone ear implant on behavior, physiological parameters, and carcass injuries of Nellore females reared in an intensive system
Provedor de dados: 96
Autores: Ferro,Rafael Alves da Costa; França,Aldi Fernandes de Souza; Arnhold,Emmanuel; Bueno,Cláudia Peixoto; Ferro,Diogo Alves da Costa; Pales,Aracele Pinheiro; Santos,Klayto José Gonçalves dos; Silva,Bruna Paula Alves da.
ABSTRACT The objective of this study was to evaluate the influence of a synthetic progesterone ear implant on the behavior, physiological responses, and number of carcass injuries of Nellore females. Twenty-eight Nellore heifers with an average initial weight of 240.89 kg were used in the experiment. All animals received the same dietary management, in an intensive rearing system with mineral salt and water ad libitum. Heifers were distributed in a completely randomized design with two treatments (with and without progesterone ear implant) and seven replications, in 14 stalls. Analyses of variance and correlation were performed. In the evaluation of the feeding, rumination, rest, sleeping, social, and body-care behaviors, no significant differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal performance; Ethology; Hormone; Norgestomet.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000700386

Performance, intestinal histomorphometry, and blood parameters of post-weaning piglets receiving different levels of soy protein concentrate in the diet
Provedor de dados: 96
Autores: Resende,Moisés Queiroz; Mello,Heloisa Helena de Carvalho; Mascarenhas,Alessandra Gimenez; Arnhold,Emmanuel; Nunes,Romão da Cunha; Teixeira,Karla Andrade; Xavier,Hyara Paula Fleuri; Borges,Kamilla Martins.
ABSTRACT Seventy-two barrows were used to evaluate the effects of the use of soy protein concentrate (SPC) in diets of post-weaning piglets on their performance, intestinal histomorphometry, and blood parameters. Piglets were weaned at 21 days of age and distributed in a randomized-block experimental design with four treatments (0, 3, 6, and 9% SPC), six replications, and three piglets per replication. Diets were formulated to meet the requirement of the piglets according to phases of 21 to 32, 33 to 42, and 43 to 66 days of age. Both feed and water were provided ad libitum during the entire experiment. The feed of the phase of 43 to 66 days was based on corn and soybean meal. In the period between 21 and 32 days of age, the use of SPC in the diet did not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food; Performance; Soybean; Swine.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000600295

Antioxidant effect of the guava byproduct in the diet of broilers in the starter phase
Provedor de dados: 96
Autores: Oliveira,Maryelle Durães de; Mello,Heloisa Helena de Carvalho; Stringhini,José Henrique; Mascarenhas,Alessandra Gimenez; Arnhold,Emmanuel; Conceição,Edemilson Cardoso da; Martins,Julyana Machado da Silva; Silva Júnior,Adesvaldo José e.
ABSTRACT This work aimed to investigate the antioxidant capacity of the guava agroindustrial waste as a functional additive in broiler feed to improve the performance and meat quality of boilers. The experiment was conducted in a completely randomized design, consisting of four treatments and six replicates with 12 birds. Treatments included different levels of guava byproduct in the feed: 0, 0.5, 1.0, and 1.5%. We evaluated the performance of broilers at 7 and 21 days old. At 21 days old, two birds from each experimental unit were euthanized for intestine histologic evaluation (duodenum, jejunum, and ileum) and breast and deboned thigh samples were collected for analyzes of pH, colorimetry (L*, a*, and b*), and thiobarbituric reactive substances (TBARS)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal-performance indexes; Antioxidant; Intestinal histology; Meat characteristics; Psidium guajava L.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100505

Substitution of blood plasma with soy protein concentrate in piglet diet
Provedor de dados: 96
Autores: Resende,Moisés Queiroz; Mascarenhas,Alessandra Gimenez; Mello,Heloisa Helena de Carvalho; Arnhold,Emmanuel; Teixeira,Karla Andrade; Rufino,Luciana Moura; Nunes,Romão da Cunha.
ABSTRACT In this study, we evaluated the effects of substitution of partial and total spray-dried blood plasma (BP) with soy protein concentrate (SPC) in the diet of post-weaning piglets on their performance, intestinal histomorphometry, and blood parameters. Fifty-four castrated male piglets, weaned at an average age of 21 days and an initial average weight of 7.01±0.294 kg, were distributed in a completely randomized block design, with three diets (0%SPC-5%BP, 2.5%SPC-2.5%BP, and 5%SPC-0%BP), six replicates, and three piglets per experimental unit. The experimental feeds were formulated to meet the requirements of the piglets at 21-32 and 33-42 days of age (pre-starter diet) and 43-66 days of age (starter diet). From 21 to 32 and 21 to 42 days of age,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed; Performance; Leukocytes; Swine; Villus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000400324

Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
Provedor de dados: 117
Autores: Arnhold,Emmanuel; Mora,Freddy; G. Silva,Ricardo; I.V. Good-God,Pedro; Rodovalho,Marcos A.
The market for popcorn (Zea mays L.) has been continuously growing in Brazil fact has required the development of cultivars adapted to local environmental conditions. For this reason, the analytical objectives of this study were to evaluate top-cross popcorn hybrids in relation to popping expansion and grain yield in three different eco-geographic regions of Brazil, in order to estimate variance components using Restricted Maximum Likelihood (REML) and predict breeding values using Best Linear Unbiased Prediction (BLUP). Genetic evaluation considered a linear model with heterogeneous residual (environmental) variances. The Restricted Likelihood Ratio Test (RLRT) evidenced significant differences (p &lt; 0.01) for the genotypic effect. Grain yield showed a...
Tipo: Journal article
Palavras-chave: Popping expansion; REML; BLUP; Improvement.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100006

Genetic parameters of growth and survival in Acacia saligna shrubs
Provedor de dados: 118
Autores: Mora,Freddy; Perret,Sandra; Scapim,Carlos Alberto; Arnhold,Emmanuel.
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...
Tipo: Journal article
Palavras-chave: Drylands; Fodder production; Acacia saligna; Multipurpose trees; Bayesian analysis.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200001

Inbreeding depression and genetic components for popping expansion and other traits in Brazilian populations of popcorn
Provedor de dados: 118
Autores: Arnhold,Emmanuel; Soriano Viana,José Marcelo; Mora,Freddy; Vieira Miranda,Glauco; Gonçalves Silva,Ricardo.
The aim of the study was to assess inbreeding depression and determine genetic components in landrace populations of popcorn. Six Brazilian popcorn landraces: Amarelo, Beija-Flor, Branco, Rosa-claro, Roxo and Viçosa, were subjected to self-pollination. Experiments with SO populations and their selfing populations (SI) were conducted in a randomized complete block design. The estimates of inbreeding depression varied from 1.2% (popping expansion) to 79% (grain yield). The gene action was predominantly additive for plant height, ear height and hundred-grain-weight. The dominance genetic effects were important for index of prolificacy and grain yield. The genetic effect of popping expansion was bidirectional with nuil dominance and a predominance of additive...
Tipo: Journal article
Palavras-chave: Zea mays L; Mprovement; Popping expansion; Popcorn; Genetic variance.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300011

Heredabilidad de la sobrevivencia en 169 familias de maíz-roseta de granos blancos: Un enfoque Bayesiano
Provedor de dados: 118
Autores: Rodovalho,Marcos de Araújo; Mora,Freddy; Santos,Elisangela Mendes dos; Scapim,Carlos Alberto; Arnhold,Emmanuel.
Durante la evaluación genética de 169 familias de medios hermanos de maíz-roseta de granos blancos (Zea mays), en el inicio de un programa de mejoramiento genético (Ciclo I) conducido en el sur de Brasil, se detectaron diferencias significativas (p &lt; 0,01) en la sobrevivencia. Consecuentemente, la sobrevivencia se incorporó dentro del programa de mejoramiento. El objetivo principal de este estudio fue examinar parámetros genéticos para la sobrevivencia, y su asociación con otras características agronómicas. Para cumplir con este objetivo se usó un enfoque Bayesiano, vía el algoritmo de Gibbs (para selección de plantas individuales) y algoritmo de cadenas independientes (para la selección de familias). La sobrevivencia (medida como una característica...
Tipo: Journal article
Palavras-chave: Algoritmo de Gibbs; Cadenas independientes; Maíz-roseta de granos blancos; Sobrevivencia; Valores genéticos; Zea mays.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000300008

Correlation between clinical findings, mast cell count and interleukin 31 immunostaining in the skin of dogs with atopic dermatitis
Provedor de dados: 65
Autores: Gonçalves,Bárbara Hess Rodrigues; Matos,Bruna Dantas; Faleiro,Mariana Batista Rodrigues; Arnhold,Emmanuel; Matos,Moema Pacheco Chediak; Santin,Ana Paula Iglesias; Moura,Veridiana Maria Brianezi Dignani de.
ABSTRACT:  In this study the correlation between the clinical score, mast cell count and interleukin 31 (IL-31) immunostaining in the skin of dogs with atopic dermatitis was determined. A total of 31 dogs of different breeds, from one to eight years of age, were chosen for the study. The 20 females and 11 males were categorized based on the CADESI-4 system, as having discrete, moderate or marked atopic dermatitis. Skin samples were collected from the axillary and interdigital regions and stained with hematoxylin and eosin for cytohistomorphological analyses and toluidine blue to evaluate the mast cell counts, and immunohistochemistry for the IL-31 immunostaining. Animals revealing higher atopic dermatitis scores had greater numbers of mast cells and IL-31...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canine allergy; Pro-inflammatory cytokine; Toluidine blue.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900600