Análise da atividade florestal no município de Viçosa-MG

Fontes, Alessandro Albino; Silva, Márcio Lopes da; Valverde, Sebastião Renato; Souza, Agostinho Lopes de

doi:10.1590/s0100-67622003000400012

Cited by 9 publications

(10 citation statements)

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“…Differences in some classifications were observed, comparing with the bibliography [6,9,11,12]. In sweet potato, truncated grains are reported because their polygonal faces are visible under light microscopy.…”

Section: Resultsmentioning

confidence: 90%

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Key to identification of starch grains used as foods

Aml

2018

Preprint

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The description of starch grains is important in different areas, such as bromatological, taxonomic, or archaeobotanic analyzes, among others. Although there are data on the microscopic description of starches used as foods, this work has proposed the development of a key to identify the starch grains in 13 raw materials obtained in specialized stores, markets and fairs to facilitate its identification. For optical microscopy, the material was deposited on a slide, being sealed with a coverslip in 50% glycerin. The samples were also mounted on double-sided tape and colloidal graphite on aluminum stubs and analyzed in scanning electron microscopy (SEM). Therefore, an unpublished starch identification key is proposed, together with the update of important data for its morphological description.

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Section: Resultsmentioning

confidence: 90%

“…Starches are products of the polymerization of glucose mainly in plants during the photosynthesis, responsible for the energy reserve, consisting of grains of different shapes, sizes and stratifications [5,6,15].…”

Section: Introductionmentioning

confidence: 99%

Key to identification of starch grains used as foods

Aml

2018

Preprint

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“…For the variation in the product prices, three alternatives were considered because although the sale of timber delivered to the customer is the most economically attractive, it is the least frequent according to a study by Fontes et al (2003).…”

Section: Resultsmentioning

confidence: 99%

Economic analysis of an agrosilvipastoral system for a mountainous area in Zona da Mata Mineira, Brazil

Müller¹,

Nogueira

Castro³

et al. 2011

Pesq. agropec. bras.

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-The objective of this work was to evaluate the economic viability of an agrosilvipastoral system developed for Zona da Mata mountainous areas in Minas Gerais state, Brazil, as well as to compare different options for wood (Eucalyptus grandis and Acacia mangium) commercialization of the second thinning. The data were obtained from a 10 year-old agrosilvipastoral system established in four hectares at Embrapa Gado de Leite station in Coronel Pacheco, MG, Brazil. As evaluation criteria for the economic viability analysis, the adopted methods were the net present value (NPV) and the internal rate of return (IRR), both calculated at 6% interest rate. Despite the small difference, adding value to forest products increased the attractiveness of the proposed system. Considered separately, the agricultural activity was impracticable, whereas the forestry and livestock activities were independently viable. The studied system seems to be equally tolerant to price variations for forest and livestock products, as well as strongly tolerant to variations in production costs.

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“…The utilization degree, as the percentage time that the machine worked. The operation efficiency was calculated by the product of the mechanical disponibility with the level of use, following Fontes and Machado (2008) methodology.…”

Section: Output Indicatorsmentioning

confidence: 99%

Operationalanalysis of Mechanical Cut-to-Length Forest Harvesting System

et al. 2017

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-The objective of this research was to conduct an operational analysis of forest harvesting activities in a mechanized of the system cut to length in eucalypt plantations in south of Bahia, to determine the distribution of operation times, productivity, operational efficiency and mechanical availability of two models of harvester and two models of forwarder, evaluating these machines in three modules harvesting methodology through time and motion studies. Auxiliary activities corresponded to the lowest percentages within the operating times (mean 1.9% to 1.8% for harvester and forwarder), already operating activities were those that had the highest percentages. The first shift was presented the worst results of operations for the harvester (average 66.3%) and the third shift for the forwarder (55.5%). For the harvester module 1 showed the best result of productive times (average 70.36%). In relation to the forwarder, this same module showed the worst results with unproductive times (average of 22.17%). The availability and mechanical parameters were superior productivity for the forwarder (mean 82.31% and 51.33 m 3 /h, respectively), as indicators of degree of utilization and operational efficiency were higher in harvester (average 85.01% and 66.41%, respectively). Thus, for the forwarder, the parameters mechanical availability and productivity were higher, while for the harvester, they were the indicators of degree of utilization and operational efficiency Keywords: Forest optimization, Analysis of income, Forest Planning. ANÁLISE OPERACIONAL DA COLHEITA FLORESTAL EM SISTEMA MECANIZADO DE TORAS CURTASRESUMO -Objetivou-se com esta pesquisa realizar uma análise operacional das atividades de colheita florestal em um sistema mecanizado de toras curtas em plantios de eucalipto no sul da Bahia. Foram determinadas a distribuição dos tempos operacionais, produtividade, eficiência operacional e disponibilidade mecânica de dois modelos de colhedor florestal (harvester) e dois modelos de trator florestal autocarregável (forwarder), em três módulos de colheita florestal através da metodologia de estudos de tempos e movimentos. As atividades auxiliares corresponderam aos menores percentuais dentro dos tempos operacionais

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Análise da atividade florestal no município de Viçosa-MG

Cited by 9 publications

References 0 publications

Key to identification of starch grains used as foods

Key to identification of starch grains used as foods

Economic analysis of an agrosilvipastoral system for a mountainous area in Zona da Mata Mineira, Brazil

Operationalanalysis of Mechanical Cut-to-Length Forest Harvesting System

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