scholarly journals Technological properties of woods used in boat’s production in the Southeast of Pará, Brazil

Rodriguésia ◽  
2020 ◽  
Vol 71 ◽  
Author(s):  
Marcelo Mendes Braga Júnior ◽  
Thayrine Silva Matos ◽  
Gabriele Melo de Andrade ◽  
Pâmela da Silva Ferreira ◽  
Marta César Freire Silva ◽  
...  
Keyword(s):  
Physical Properties ◽  
Wood Species ◽  
Wood Anatomy ◽  
Amazon Region ◽  
The State ◽  
Frequency Of Occurrence ◽  
Medium Density ◽  
Technological Properties ◽  
Bertholletia Excelsa ◽  
Effective Supervision

Abstract The aim of this study was to identify, anatomically characterize, and determine some of the physical properties of wood species that are used for boat production in the southeast region of the state of Pará in Brazil. The samples were collected during visits to shipyards in the region, then it was identified at the specie level and technologically characterized. Eight species belonging to four distinct botanical families were identified. All identified species had presented some type of deposition in its vessels and 87% of them had had medium density (0.40 to 0.75 g.cm-3). The species with higher frequency of occurrence and that had more parts used for boat production were Caryocar villosum and Apuleia leiocarpa. It was observed two different group arrangements of species, “piquiá” (Caryocar villosum and Alexa grandiflora) and “tatajuba” (Bagassa guianensis and Enterolobium schomburgkii). It was also identified the illegal commercialization of “castanheira’s” wood (Bertholletia excelsa). The results can indicate anatomical and physical similarities in woods used in boat production and can contribute as a component of a database in wood anatomy of specie used for boat production in the Amazon region, besides to subside practices that contribute to an effective supervision of the logging market in the region.

Medium density boards made of groundwood fibres: an analysis of their mechanical and physical properties

2018 ◽  
Vol 77 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Sauro Bianchi ◽  
Heiko Thömen ◽  
Stefan Junginger ◽  
Frédéric Pichelin
Keyword(s):  
Physical Properties ◽  
Medium Density ◽  
Mechanical And Physical Properties

scholarly journals LAMINAR INCLUSION IN SUGARCANE BAGASSE PARTICLEBOARD

CERNE ◽  
2017 ◽  
Vol 23 (2) ◽  
pp. 153-160
Author(s):  
Stefania Lima Oliveira ◽  
Ticyane Pereira Freire ◽  
Tamires Galvão Tavares Pereira ◽  
Lourival Marin Mendes ◽  
Rafael Farinassi Mendes
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Sugarcane Bagasse ◽  
Wood Species ◽  
Sugar Cane ◽  
Physical And Mechanical Properties ◽  
Pressure Level ◽  
Sugar Cane Bagasse

ABSTRACT The objective of this study is to assess the effect of the laminar inclusion on the physical and mechanical properties of sugarcane bagasse particleboard. We used the commercial panels of sugarcane bagasse produced in China. To evaluate the effect of the laminar inclusion was tested two wood species (Pinus and Eucalyptus) and two pressures (10 and 15 kgf.cm-2) along with a control (without laminar inclusion). The panels with laminar inclusion obtained improvements in the physical properties, with a significant reduction in the WA2h, WA24h and TS2h. There was a significant increase in the properties MOE and MOR parallel and Janka hardness, while the properties MOE and MOR perpendicular decreased significantly. The pinus and eucalyptus veneers inclusion resulted in similar results when added to the panel with a 10 kgf.cm-2 pressure. The use of 15 kgf.cm-2 pressure is not indicated for the pinus veneer inclusion in sugar cane bagasse panels. There was no effect of the pressure level when evaluating the eucalyptus veneer inclusion on the properties of the sugarcane bagasse panels.

scholarly journals The research of some physical properties of wood Paulownia elongata and Paulownia fortuneii

2003 ◽  
pp. 211-221
Author(s):  
Borislav Soskic ◽  
Aleksandar Lovric ◽  
Boda Vukovojac
Keyword(s):  
Physical Properties ◽  
Wood Species ◽  
Tension Wood ◽  
Wood Products ◽  
Similar Species ◽  
Study Material ◽  
Hygroscopic Moisture ◽  
Study Results ◽  
Shrinkage And Swelling ◽  
Paulownia Elongata

The density, shrinkage and swelling of Paulownia elongata and P. fortuneii wood were researched. The study material was provided by Boda Vukovojac, B. Sc., who established the Paulownia plantation and sample plots on the territory of the Municipality Bela Crkva. The study results show the differences between the analyzed properties of these two species. The study results were also compared with the results of the similar species of wood. The data shows that the study wood can be used in wood products that are not subject to great loads during exploitation. Further study should investigate the liability of these wood species to form tension wood and deformations in the conditions of variable hygroscopic moisture.

scholarly journals Anatomia da madeira de Maba inconstants (Jacq.) Gris. (Ebenaceae)

1983 ◽  
Vol 5 (5) ◽  
pp. 153
Author(s):  
José Newton Cardoso Marchiori
Keyword(s):  
Wood Anatomy ◽  
Rio Grande ◽  
Anatomical Structure ◽  
The State ◽  
Great Similarity ◽  
Rio Grande Do Sul ◽  
Native Tree

This study describes the general, macroscopic and microscopic anatomical structure of the called "Maria-Preta" (Maba inconstans (Jacq.) Gris.), a native tree to the State of Rio Grande do Sul, Brazil. The wood anatomy of this species is compared with the usual literature for this botanical family. It was found a great similarity between the wood of Maba inconstans and the xylology of the genus Diospyros.

scholarly journals Anatomía de la madera de ocho especies de angiospermas de clima templado

2017 ◽  
pp. 5
Author(s):  
Alejandra Quintanar ◽  
Carmen de la Paz Pérez-Olvera ◽  
Isabel De la Cruz-Laina ◽  
Daría Razo-Balcazar
Keyword(s):  
Wood Anatomy ◽  
The State ◽  
Microscopic Characteristic ◽  
Anatomical Features ◽  
Ostrya Virginiana ◽  
Alnus Acuminata

Wood anatomy of Alnus acuminata Kunth, Ostrya virginiana Rose, Quercus dyseophylla Benth. and Quercus glabrescens Benth., Arbutus glandulosa DC., Arbutus tessellata Sorensen, Styrax argenteus Presl. and Buddleia wrightii Robinson, collected in the state of Jalisco and Puebla are given. For each studied taxa, distinctive anatomical features are rebounded, and for each microscopic characteristic, photographs are given. Recommendations on their uses are suggested.

Biotechnology as a Driving Force for Regional Development

2013 ◽  
Vol 4 (3) ◽  
pp. 28-51
Author(s):  
Maurício Aguiar Serra ◽  
José Raimundo Vergolino ◽  
Artur da Silva Coelho
Keyword(s):  
Natural Resources ◽  
Regional Development ◽  
Driving Force ◽  
Institutional Environment ◽  
Science And Technology ◽  
Amazon Region ◽  
The State ◽  
Biotechnological Products ◽  
Productive Activities ◽  
The Relationship

The main objective of this article is to analyse the development of Amazon region through biotechnological activities. Amazonia, by virtue of its tremendous biodiversity, has excellent possibilities of meeting a growing market for biotechnological products, being that the development of this sector demands not only abundant natural resources, but also the existence of an institutional environment that is able to integrate productive activities with research on science and technology. The promotion of regional development, thus, depends on the configuration, which, according to Boisier, is composed by six elements, present in all regions that interact with each other. The article concludes that Amazonian development is directly related to the participation capability of many segments of society for the development of biotechnological activities, in which the State should play an important role in drawing up policies towards the biotechnological sector and, at the same time, in setting up participation channels for the relationship among actors.

Forming and Utilizing Ferrochromium Production Waste

2020 ◽  
Vol 989 ◽  
pp. 492-497 ◽  
Author(s):  
Ivan D. Kascheev ◽  
Vladimir I. Zhuchkov ◽  
Oleg V. Zayakin
Keyword(s):  
Phase Composition ◽  
Physical Properties ◽  
Russian Federation ◽  
Production Waste ◽  
Technological Properties ◽  
High Carbon ◽  
Chemical Phase ◽  
Physico Chemical ◽  
Thermo Physical Properties ◽  
Ferrochromium Slag

Analysis of forming chromium-bearing ferroalloys production waste in Russian Federation was performed. Chemical, phase, fractional compositions and physico-chemical, technological properties of high-carbon ferrochromium slag were defined. Physico-chemical, thermo-mechanical and thermo-physical properties of fire-resistant materials, obtained from ferrochromium production slag and dust, were researched. It was shown that researched waste may be utilized as raw for fire-resistant materials production. Because of their chemical and phase composition, researched materials may be utilized for production of forsterite-spinel-based and forsterite-spinel-periclase-based fire-resistant materials. Technological properties of researched materials allow obtaining dense strength fire-resistant materials. Such fire-resistant materials are promising in the field of ferrous metallurgy (lining up furnaces, ladles and overflow launders in ferroalloys production).

The tadpole of Amazophrynella teko (Anura: Bufonidae) from the eastern Amazon, Brazil

Zootaxa ◽  
2020 ◽  
Vol 4830 (3) ◽  
pp. 592-596
Author(s):  
MARCELO MENIN ◽  
MARCOS ROBERTO DIAS-SOUZA ◽  
CARLOS EDUARDO COSTA-CAMPOS
Keyword(s):  
French Guiana ◽  
Brazilian Amazon ◽  
Wide Distribution ◽  
Amazon Region ◽  
The State ◽  
Taxonomic Classification ◽  
Nominal Species

The genus Amazophrynella Fouquet, Recoder, Teixeira, Cassimiro, Amaro, Camacho, Damasceno, Carnaval, Moritz, and Rodrigues, is represented by 12 nominal species and distributed in the Amazon region of Brazil, Bolivia, Colombia, Ecuador, Guyana, French Guiana, Peru, and Venezuela (Frost 2020). In the last eight years, ten species from this genus have been described. However, despite the wide distribution and diversity of these species, only the tadpole of Amazophrynella manaos Rojas, Carvalho, Ávila, Farias, and Hrbek from the Brazilian Amazon (Menin et al. 2014) and A. siona Rojas, Fouquet, Ron, Hernández-Ruz, Melo-Sampaio, Chaparro, Vogt, Carvalho, Pinheiro, Ávila, Farias, Gordo, and Hrbek from Ecuador have been formally described (Duellman & Lynch 1969; Rojas et al. 2018). Literature about tadpole morphology, reproduction, and bioacoustics of Amazophrynella is scarce and necessary to a comprehensive taxonomic classification (Kaefer et al. 2019). Herein, we describe the tadpole of the recently described species Amazophrynella teko Rojas, Fouquet, Ron, Hernández-Ruz, Melo-Sampaio, Chaparro, Vogt, Carvalho, Pinheiro, Ávila, Farias, Gordo, and Hrbek, found in the northeastern Amazon, in the State of Amapá, Brazil, and in French Guiana. 

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