scholarly journals Growth and yield prediction using the modified Buckman model

2006 ◽  
Vol 30 (5) ◽  
pp. 787-793 ◽  
Author(s):  
Antonilmar Lopes da Silva ◽  
João Carlos Chagas Campos ◽  
Helio Garcia Leite ◽  
Agostinho Lopes de Souza ◽  
Pablo Falco Lopes

A model to manage even-aged stands was developed using a modification of the Buckman model. Data from Eucalyptus urophylla and Eucalyptus cloeziana stands located in the Northern region of Minas Gerais State, Brazil were used in the formulation of the system. The proposed model generated precise and unbiased estimates in non-thinned stands.

2020 ◽  
Author(s):  
Luan Felipo Botelho Souza ◽  
Felipe Souza Nogueira Lima ◽  
Tárcio Peixoto Roca ◽  
Alcione de Oliveira dos Santos ◽  
Felipe Gomes Naveca ◽  
...  

Abstract SARS-CoV-2 has spread rapidly around the world, with Brazil currently considered an epicenter of the pandemic. The northern region of the country has the highest incidence and mortality rates. This study aimed to investigate information about the evolutionary history of epidemic spread and genetic aspects of strains isolated on the Western Amazon, in the State of Rondônia, Brazil. It was possible to detect a total of 22 mutations. Some of these alterations may possibly be related to effects on transmissibility, the fidelity of RNA replication, the ability of cancer patients to respond to infection, beyond a mutation that emerged after the introduction of SARS-CoV-2 in Rondônia. At least two events of introduction were detected, corresponding to the B.1 and B.1.1 European lineages. An introduction was observed possibly through Argentina, where strains originated that circulated in the Minas Gerais and Ceará Brazilian states, prior to Rondônia (B.1.), as well as through the Minas Gerais state and the Federal District, which gave rise to strains that spread to Rondônia, from the capital to more rural parts of the state (B.1.1.). The findings show the need to monitor the genetic epidemiology of COVID-19, in order to surveil the virus’s evolution, dispersion and diversity.


2020 ◽  
Vol 8 ◽  
pp. 01
Author(s):  
Caio Ferreira da Silva ◽  
Drauzio Correia Gama ◽  
Lais Almeida Araújo ◽  
Jean Barcello Xavier Bahia ◽  
Vinícius Orlandi Barbosa Lima

Copaifera langsdorffii specie occurs throughout Brazil and is of great economic importance, mainly due to its production of oil-resin used for various pharmacological purposes. The objective of this study was to analyze the morphometric relationships in C. langsdorffii stand in northern region of Minas Gerais state, Brazil. Twenty trees were randomly sampled and were measured: stem circumference at 1.3 m height, total height (Ht) and crown diameter (CD). Morphometric indices were estimated. Correlations between dendrometric and morphometric variables were obtained through the Pearson matrix. The morphometric relations of crown proportion (CP), crown area (CA), formal of crown (FC), degree of slenderness (DS), salience index (SI), coverage index (CI) and vital space (VS) presented values of 15.26%, 25.06 m², 1.47, 16.35, 21.70, 0.47 and 7.01, respectively. Strong positive correlations were found in: diameter at breast height (DBH) in relation to CD and CA; Ht with crown proportion (CP) and DS; the formal of crown (FC) with the CI and VS, and between the CI and VS. The morphometric indices made it possible to understand the few magnitude of stand variation. The species can be characterized as facilitating management.


2009 ◽  
Vol 81 (1) ◽  
pp. 61-66 ◽  
Author(s):  
José C. Zanuncio ◽  
Jorge B. Torres ◽  
Camilla A.Z. Sediyama ◽  
Fabricio F. Pereira ◽  
Patrik L. Pastori ◽  
...  

Euselasia eucerus (Hewitson, 1872) (Lepidoptera: Riodinidae) is a Brazilian native species commonly found in Eucalyptus plantations. Biotic mortality factors of this defoliator were studied in a Eucalyptus urophylla plantation in Minas Gerais State, Brazil aiming to identify natural enemies and their impact on this insect. Euselasia eucerus had biotic mortality factors during all development stages. The most important were Trichogramma maxacalii Voegelé and Pointel, 1980 (Hymenoptera: Trichogrammatidae) during egg stage (48.9%), a tachinid fly (Diptera: Tachinidae) during larval stages (10%) and Itoplectis sp. (Hymenoptera: Ichneumonidae) during pupal stage (52.2%). The parasitism rate was higher in the basal part of the plant canopy (37.8%).


Zootaxa ◽  
2020 ◽  
Vol 4808 (2) ◽  
pp. 251-283
Author(s):  
MAYSA FERNANDA VILLELA REZENDE SOUZA ◽  
RODRIGO LOPES FERREIRA

In this paper, we describe three new Eukoenenia species from specimens collected in limestone caves in the northern region of the Minas Gerais state, Brazil. These species present different degrees of adaptation to the subterranean habitat, with Eukoenenia magna sp. nov., with 6 blades on lateral organs and body ratios very close to other troglobitic species, being the most troglomorphic among them. This species is morphologically very similar to the Brazilian troglobites E. navi, E. eywa and E. neytiri. Eukoenenia lundi sp. nov. and Eukoenenia jequitai sp. nov. are probably closely related species due to their substantial morphological resemblance. These two species are closer to E. virgemdalapa among the Brazilian species described to date. We provide a table summarizing the main diagnostic characters of the three species herein described and those of the Brazilian congeners to facilitate morphological comparisons. 


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Luan Felipo Botelho-Souza ◽  
Felipe Souza Nogueira-Lima ◽  
Tárcio Peixoto Roca ◽  
Felipe Gomes Naveca ◽  
Alcione de Oliveria dos Santos ◽  
...  

AbstractSARS-CoV-2 has spread rapidly around the world, with Brazil currently considered an epicenter of the pandemic. The Northern region has the second highest incidence coefficient, as well as the third highest mortality rate in the country. This study aimed to investigate information about the evolutionary history of epidemic spread and genetic aspects of strains isolated on the Western Amazon, in the State of Rondônia, Brazil. It was possible to detect a total of 22 mutations. Some of these alterations may possibly be related to effects on transmissibility, the fidelity of RNA replication, the ability of cancer patients to respond to infection, beyond a mutation that emerged after the introduction of SARS-CoV-2 in Rondônia. At least two events of introduction were detected, corresponding to the B.1 and B.1.1 European lineages. An introduction was observed possibly through Argentina, where strains originated that circulated in the Minas Gerais and Ceará Brazilian states, prior to Rondônia (B.1.), as well as through the Minas Gerais state and the Federal District, which gave rise to strains that spread to Rondônia, from the capital to more rural parts of the state (B.1.1.). The findings show the need to monitor the genetic epidemiology of COVID-19, in order to surveil the virus’s evolution, dispersion and diversity.


Author(s):  
Tamara Figueiredo ◽  
Patrick Leonardo Nogueira Da Silva ◽  
Larissa Freitas Guimarães ◽  
Camilla Freitas Guimarães ◽  
Maricy Kariny Soares Oliveira ◽  
...  

Objetivo: avaliar os registros de enfermagem de pacientes internados na clínica médica de um hospital universitário do norte do Estado de Minas Gerais. Método: trata-se de um estudo descritivo, retrospectivo, documental, com abordagem quantitativa, realizado com 189 prontuários de pacientes internados na clínica médica de um hospital universitário durante o período de julho a dezembro de 2012. Utilizou-se um formulário como instrumento de coleta de dados. O tratamento dos mesmos se deu por meio de amostragem probabilística aleatória simples. Resultados: observou-se tempo de internação mínimo e máximo de um e 97 dias (19,58±13,65), respectivamente. Houve prevalência das conformidades nos registros de enfermagem, sendo estas: leito, anotação descritiva, data e horário, presença de rubrica e carimbo do profissional, admissão, alta e/ou óbito, checagem e letra legível. Conclusão: a presença de não conformidades observadas nos registros de enfermagem compromete a funcionalidade do registro como instrumento de qualidade.


2006 ◽  
Vol 30 (4) ◽  
pp. 659-667 ◽  
Author(s):  
Carla Priscilla Távora Cabral ◽  
Benedito Rocha Vital ◽  
Ricardo Marius Della Lucia ◽  
Alexandre Santos Pimenta ◽  
Carlos Pedro Boechat Soares ◽  
...  

Este trabalho teve como objetivo avaliar as propriedades de chapas de 0riented Strand Board (OSB), fabricadas com flocos de madeira de Eucalyptus grandis, Eucalyptus urophylla e Eucalyptus cloeziana e oriundas dos Municípios de Ponte Alta e Três Marias, no Estado de Minas Gerais. As massas específicas básicas das três espécies de eucaliptos das duas regiões foram, respectivamente: Ponte Alta (0,55; 0,61; e 0,70 g/cm³) e Três Márias (0,56; 0,58; e 0,69 g/cm³). Quando necessário, para manter as massas específicas das chapas próximas de 0,70 g/cm³ foram acrescentadas às partículas de madeira de eucalipto partículas de madeira de Pinus elliottii, oriundo da cidade de Viçosa, com massa específica de 0,45 g/cm³. Os flocos foram gerados nas dimensões médias de 90,00 x 20,00 x 0,46 mm. O adesivo utilizado foi o fenol-formaldeído, na proporção de 8% de sólidos, em relação à massa seca de partículas. Parte dos flocos de eucaliptos foram acetilados. As chapas foram prensadas à temperatura de 170 °C e 32 kgf/cm² de pressão. As propriedades das chapas foram determinadas segundo as normas da ABNT NBR 14810-3 (2002) e ASTM-D 1037 (1991). Os resultados foram comparados utilizando-se as normas ANSI/A - 208.1 (1993) e CSA 0437-93 (1993). As chapas contendo partículas acetiladas foram mais estáveis e adsorveram menos umidade. Na tração perpendicular, observou-se que as chapas contendo 100% de flocos acetilados apresentaram resultados inferiores ao estipulado pela norma CSA O437-0/93 (1993). A resistência ao arrancamento de parafuso, módulo de ruptura (paralelo e perpendicular) e compressão longitudinal (perpendicular), foi reduzida pela acetilação nas chapas contendo 100% dos flocos acetilados. As espécies que apresentaram, numericamente, as maiores médias para resistência mecânica foram: Eucalyptus grandis não acetilado (dureza Janka) e Eucalyptus cloeziana misturado com Pinus sp (módulo de ruptura). Somente a resistência à compressão longitudinal foi afetada pela região de origem da madeira. Os painéis fabricados com madeira de Eucalyptus urophylla, oriunda do Município de Três Marias, tiveram médias inferiores aos das chapas feitas com a mesma espécie, porém oriundas do Município do Rio Doce.


2016 ◽  
Vol 83 (0) ◽  
Author(s):  
Estela Rosana Durães Vieira ◽  
Marcus Alvarenga Soares ◽  
Enilson de Barros Silva ◽  
Sebastião Lourenço Assis Júnior ◽  
Gabriel Alves Barroso

ABSTRACT: Insect pests are limiting factors to the expansion of Eucalyptus spp. plantations in Brazil. Aphids of the species Myzus persicae (Sulzer, 1776) (Hemiptera: Aphididae) are a key pests in different crops and may negatively affect the growth, development and survival of plants. This paper reports the first record of M. persicae in seedlings of Eucalyptus urophylla grown in a greenhouse in Diamantina, Minas Gerais state, Brazil. This finding suggests the implementation of an integrated management program for this aphid, in order to prevent it from becoming a pest in Eucalyptus .


2017 ◽  
Vol 20 (1) ◽  
pp. 13-26 ◽  
Author(s):  
Marcos Magalhães de Souza ◽  
Epifânio Porfiro Pires ◽  
Ângela Gomes Brunismann ◽  
Lucas Rocha Milani ◽  
Ângelo Parise Pinto

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