Annals of WULS, Forestry and Wood Technology

2021 ◽  
Keyword(s):  
Nativa ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 107
Author(s):  
Talita Baldin ◽  
Maiara Talgatti ◽  
José Newton Cardoso Marchiori ◽  
Amanda Grassmann Da Silveira

Baseando-se na descrição anatômica de três espécies de Calycophyllum, sendo elas Calycophyllum candidissimum, Calycophyllum multiflorum e Calycophyllum spruceanum e uma variedade Calycophyllum spruceanum f. brasiliensis, pretende-se inferir sobre o comportamento da madeira, e, ao mesmo tempo atribuir, ainda que empiricamente, um uso adequado ao material. As amostras analisadas são provenientes de diferentes instituições científicas, tais como o Jodrell Laboratory (Kew Gardens, Londres), o Instituto de Pesquisas Tecnológicas do Estado de São Paulo (IPT) e a Universidade alemã Black Forest Academy (BFA). Para a obtenção de lâminas histológicas e de macerado utilizou-se respectivamente, a técnica padrão e o método de Franklin modificado. As descrições anatômicas seguiram as recomendações do IAWA Committee. As espécies compartilham os seguintes caracteres: anéis de crescimento distintos; poros em arranjo radial e de paredes espessas; porosidade difusa; placas de perfuração simples; pontoações intervasculares pequenas, ornamentadas; parênquima axial ausente; raios heterocelulares; e fibras libriformes septadas, de comprimento médio, com paredes delgadas a espessas. É pressuposto que as características anatômicas do lenho das espécies investigadas, conferem à madeira uma alta massa específica, resistência a esforços mecânicos, alta contração volumétrica, permeabilidade e boa durabilidade natural.Palavra-chave: tecnologia da madeira, anatomia do lenho, Rubiaceae. TECHNOLOGICAL PREDICTIONS ON THE WOOD OF FOUR AMAZONIAN HARDWOOD:  AN EVALUATION UNDER ANATOMIC APPROACH ABSTRACT:Based on the anatomic description of three species of Calycophyllum being them Calycophyllum candidissimum, Calycophyllum multiflorum and Calycophyllum spruceanum and one variety of Calycophyllum spruceanum f. brasiliensis, it is intended to infer the wood performance, and assign a proper use to the material, even though empirically. The studied samples come from different scientific institutions, such as Jodrell Laboratory (Kew Gardens, London), Institute for Technological Research (São Paulo, Brazil) and the Black Forest Academy (BFA), Germany. To obtain histological slides and from macerated, the standard technique and the modified Franklin method were used, respectively. The anatomic descriptions followed the IAWA Committee recommendations. The species have the followings characteristics in common: distinct growth rings; pores in radial arrangement and thick walls; diffuse porosity; simple perforation plates; pits small intervessel, ornamented; absent axial parenchyma; heterocell rays; and libriform chambered fiber, medium length, with thin and thick walls. It is assumed that the anatomical characteristics of the wood of the investigated species, confer the wood a high specific mass, resistance to mechanical stress, hight shrinkage, permeability and good natural durability.Keywords: wood technology, wood anatomy, Rubiaceae. DOI:


2019 ◽  
Vol 12 (1) ◽  
pp. 188
Author(s):  
Rossana Cortelini da Rosa ◽  
Dione Dambrós Raddatz ◽  
Paulo Fernando dos Santos Machado ◽  
Mario Lima dos Santos ◽  
Alexandro Dias Martins Vasconcelos ◽  
...  

The composition of the wood and its elements are considered determinants in the wood properties, standing out the fibers, axial parenchyma, number of vessels and rays. In this context, we aimed to investigate and describe the wood anatomical structure of the Erythroxylum myrsinites Mart. and identify its potential uses in the area of wood technology. From the tree, were removed three wood samples for the confection of anatomical slides, witch 3 × 3 × 3 cm, oriented we plans transversal, longitudinal and tangential longitudinal. For the preparation of histological blades, the method of Burger and Richter was adopted; the anatomical description was based on IAWA Committee recommendations. The species presents vessels numerous, solitary, composing 19% of the volume of wood. Diffuse porosity of polygonal contour and thin walls. Mean vascular elements, axial parenchyma representing 3% of the volume of the wood, in a paratracheal vasicentric arrangement. The rays are numerous, occupying 23% of the volume of the wood, narrow and heterogeneous, consisting of procumbent, square and erect cells. The fibers are libriform, of length medium and thick walls, occupying 55% of the volume of the wood, have spiral thickening and septate fibers, absent tracheids, and gelatinous fibers abundant. The characteristics presented give high flexibility to the stem and branches, and the wood with low specific mass, permeable and resistant to mechanical loads has potential for use in energy generation.


2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Muhammad Ramadhan Dwi ◽  
. Nurhaida

Myrmecodia pendens are epiphytic plants which known as herbal plants in some region in Indonesia. The purpose of this study was to examine Myrmecodia pendens extracts with different concentrations against subterranean termites Coptotermes curvignathus Holmgren. The research was conducted at the Wood Technology Laboratory, Forestry Faculty, Tanjungpura University for three months. Myrmecodia pendens was from Maluku Island. 50 gram Myrmecodia pendens was extract with methanol with ratio 1:3,  then the extract was made into five concentrations i.e. 2%, 4%, 6%, 8% and 10%. Filter paper then dipped into the extract solution and used for food substrates of termites. The bioassay was conducted for 21 days in termite’s chamber room. Each treatment has three replications. The indicator used for evaluate the effectiveness of the extract was termites mortality and filter paper weight loss. The results showed the rendemen of Myrmecodia pendens extract was 24.1888 gram (23.1576%). The average value of termite’s mortality was 67.33% - 100.00%. The concentration of 2% has termites mortality values of 67.33% and included in the category of strong levels of anti-termite activity. The highest termite’s mortality value was achieved on concentration of 10%. The average value of filter paper weight loss was 33.54% – 65.27%. The highest concentration of the extracts resulted in the lowest filter paper weight loss. Meanwhile on control treatment the average values of termites mortality was 14.67% and the filter paper weight loss was 73.22%. The extract Myrmecodia pendens was effectives to inhibition the subterranean termites attacks. The optimum concentration of Myrmecodia pendens extract was achieved at concentration 6% with termites mortality value was 78% with category of very strong levels of anti-termite activity.Keywords : antitermites, Coptotermes curvignathus, Myrmecodia pendens, preservation


2021 ◽  
Vol 115 ◽  
pp. 85-94
Author(s):  
Anna Różańska

Classics of Polish Design. Post-War Polish Furniture Design the paper presents a review of Polish post-war design in the times of Polish People's Republic: in the 1950s and 1960s. It is the first paper in the series of "Classical Polish Design", presenting the results of research on Polish furniture and the icons of Polish design, carried out within the framework of dissertations in the Department of Wood Technology in the Warsaw University of Life Sciences (SGGW). The paper presents two main trends in Polish post-war design, together with their background. We analysed the development of industrial design and of mass production dedicated for mass users, as well as the education system for industrial designers. We present the concept of furniture for small living spaces and the impact of global trends, availability of new materials and technological solutions on Polish furniture design.


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