scholarly journals Physical Properties of Juvenile Wood of Two Paulownia Hybrids

2020 ◽  
Vol 71 (2) ◽  
pp. 179-184
Author(s):  
Tomislav Sedlar ◽  
Iva Ištok ◽  
Marko Kučinić ◽  
Branimir Jambreković ◽  
Damir Drvodelić ◽  
...  
Keyword(s):  
Physical Properties ◽  
Juvenile Wood ◽  
Wood Products ◽  
Dry Density ◽  
Wood Fibers ◽  
Paulownia Tomentosa ◽  
Fast Growing ◽  
Significant Difference ◽  
Paulownia Fortunei ◽  
Fast Growing Species

There is a growing trend in the world of planting fast growing species (rotations 5 to 10 years). Their primary purpose is the production of wood fibers and biomass, but they certainly represent the potential in making solid wood products as well. One of the fast-growing species is Paulownia sp., a species of extremely fast growing wood. Plantation breeding of Paulownia sp. in Croatia is increasing, although there is a little knowledge about the technical properties of Paulownia wood and its end use is questionable. This paper presents preliminary results of some physical properties of juvenile wood of two Paulownia hybrids planted in the area near the town of Glina in the Republic of Croatia. One hybrid is 9501 ((Paulownia fortunei × Paulownia elongata) × (Paulownia fortunei × Paulownia tomentosa)) and the other hybrid is Shan Tong (Paulownia fortunei × Paulownia tomentosa). The aim of this study was to investigate physical properties of juvenile wood of two Paulownia hybrids from one site in Croatia, to determine differences in physical properties of wood between two hybrids and to evaluate the correlation between density and shrinkages of each hybrid. Significant differences in oven dry density, basic density and density at maximum MC, between the two hybrids were determined. There is no statistically significant difference in longitudinal, radial, tangential and volumetric shrinkages between the two hybrids.

scholarly journals Termite Resistance of Furfuryl Alcohol and Imidacloprid Treated Fast-Growing Tropical Wood Species as Function of Field Test

2020 ◽  
Vol 10 (17) ◽  
pp. 6101
Author(s):  
Yusuf Sudo Hadi ◽  
Elis Nina Herliyana ◽  
Desy Mulyosari ◽  
Imam Busyra Abdillah ◽  
Rohmah Pari ◽  
...  
Keyword(s):  
Wood Species ◽  
Furfuryl Alcohol ◽  
Juvenile Wood ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Polymerization Process ◽  
Termite Resistance ◽  
Fast Growing ◽  
Fast Growing Species ◽  
Anthocephalus Cadamba

In general fast-growing tree species harvested at a young age has substantial amount of sapwood. It also contains juvenile wood, which has undesirable inferior physical and mechanical properties. Having sapwood and juvenile wood in the trees makes them very susceptible to be attacked by biological deterioration specifically termites in a tropical environment. The main objective of this study was to investigate the termite resistance of four fast-growing Indonesian wood species treated with furfuryl alcohol and imidacloprid. Wood specimens from sengon (Falcataria moluccana), jabon (Anthocephalus cadamba), mangium (Acacia mangium), and pine (Pinus merkusii) were impregnated with furfuryl alcohol, using tartaric acid and heat as well as treated with imidacloprid for the polymerization process. All of the specimens were exposed to environmental conditions in the field for three months. Based on the findings in this work, the untreated control samples had higher weight loss values and lower protection levels than those of imidacloprid-treated and furfurylated samples of all four species. It appears that furfurylation and imidacloprid treatment of such fast-growing species had a significant impact regarding their resistance against termite so that their service life can be extended during their utilization.

Heartwood durability of Dyera costulata, Neolamarckia cadamba and Khaya ivorensis trees from fast-growth plantations against subterranean termite Coptotermes curvignathus

Holzforschung ◽  
2018 ◽  
Vol 72 (2) ◽  
pp. 143-149 ◽  
Author(s):  
Roszaini Kadir ◽  
Khairul Masseat
Keyword(s):  
Weight Loss ◽  
Natural Forest ◽  
Fast Growth ◽  
Subterranean Termite ◽  
Forest Plantations ◽  
Natural Forests ◽  
Mature Trees ◽  
Fast Growing ◽  
Significant Difference ◽  
Fast Growing Species

AbstractTo preserve natural forests, forest plantations with fast-growing species are promoted. In the present work, the heartwood durabilities ofDyera costulata,Neolamarckia cadambaandKhaya ivorensis, from both plantations and natural forests, have been tested in comparison with rubberwood in laboratory and above-ground tests against the subterranean termiteCoptotermes curvignathus. Both young trees from forest thinning and mature trees were tested. The results show that there is no significant difference in weight loss between planted trees and trees from a natural forest. The results were also compared with those of rubberwood.

Development and Application of High-Valued Wood Products Made of Fast-Growing Poplar

2011 ◽  
Vol 311-313 ◽  
pp. 117-121
Author(s):  
Wei Xu ◽  
Zhi Hui Wu ◽  
Yuan Yuan Zou
Keyword(s):  
21St Century ◽  
Solid Wood ◽  
Wood Products ◽  
Low Grade ◽  
Wood Industry ◽  
Fast Growing ◽  
Laminated Veneer Lumber ◽  
Wood Floor ◽  
Industrial Utilization ◽  
Fast Growing Species

In recent years, wood of greatly value are decreasing continuously. However, the percentage of low-grade wood or fast-growing species are increasing. The utilization of fast-growing species is one of the significant themes of investigation in wood industry. Fast-growing poplar (southern type poplar) which have been planted successfully and grown over a wide area in China are well known as famous fast-growing species of the most important commercial trees and industrial timber. In this paper, the distributions of plantation resources and methods of industrial utilization of fast-growing poplar in China were analyzed, respectively. High-valued wood products made of fast-growing poplar will be an inevitable trend in wood industry, including wood-based panel, engineered wood, solid wood door, curved laminated veneer lumber, and wood floor, in the 21st century. In this paper, varieties of poplar products inclued poplar composites board, poplar floor, poplar technological door, curved laminated veneer poplar molding components and poplar scientific wood were introduced. On the basis of research and application, the author emphatically analyzed multi-layer wood floorings made of fast-growing poplar veneer and MDF, curved furniture components made of poplar veneer, sofa frame maed from poplar composites board.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

STUDY ON PHYSICAL AND SENSORICAL CHARACTERISTICS OF FLESH RESTRUCTURED WITH SAGO CATFISH JERKY

2014 ◽  
Vol 4 (2) ◽  
pp. 55-64
Author(s):  
Amir Jayani ◽  
Zulman Efendi ◽  
Devi Silsia
Keyword(s):  
Physical Properties ◽  
Water Content ◽  
Analysis Of Variance ◽  
Test Data ◽  
Organoleptic Test ◽  
Significant Difference

This study aims to gain influence the thickness and concentration variations affect the characteristics of sago binder physical properties of catfish jerky. As well as getting influence the thickness and concentration variations affect the level of binder sago joy panelists in terms of organoleptic test. Data were analyzed by analysis of variance using the Analysis Of Variance (ANOVA). If there is a significant difference followed by a further test of DMRT 5% level (physical properties). While the hedonic test performed using Kruskal Wallis analysis. Results uniformity analysis (ANOVA) showed catfish fillet thickness and concentration of sago affect the physical properties of the water content and the level of violence. Where catfish jerky using sago binder 5% and 10% significantly different. The use of sago binder 5% and 10% led to an increase in water content. Besides the addition of the binder resulted in increasing levels of violence catfish jerky. Based on the statistics found that the influence of the thickness and concentration of the binder sago aroma, flavor and color of the sixth jerky catfish were not significantly different. But the texture was significantly different.

scholarly journals Anti-Microbial and Remineralizing Properties of Self-Adhesive Orthodontic Resin Containing Mesoporous Bioactive Glass

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3550
Author(s):  
Aerin Choi ◽  
Kyung-Hyeon Yoo ◽  
Seog-Young Yoon ◽  
Bong-Soo Park ◽  
In-Ryoung Kim ◽  
...  
Keyword(s):  
Bond Strength ◽  
Physical Properties ◽  
Bioactive Glass ◽  
Shear Bond Strength ◽  
Antibacterial Effect ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Significant Difference ◽  
Mesoporous Bioactive Glass

Self-adhesive resins (SARs) contain adhesives, which simplify the procedures of resin application, and primers, which provide sufficient bonding ability. In this study, mesoporous bioactive glass nanoparticles (MBN) were added to a SAR to easily improve the physical properties and remineralization ability. The experimental resins comprised 1%, 3%, and 5% MBN mixed in Ortho Connect Flow (GC Corp, Tokyo, Japan). As the MBN content in the SAR increased, the microhardness increased, and a statistically significant difference was observed between the cases of 1% and 5% MBN addition. Shear bond strength increased for 1% and 3% MBN samples and decreased for 5% MBN. The addition of MBN indicated a statistically significant antibacterial effect on both gram-negative and gram-positive bacteria. The anti-demineralization experiment showed that the remineralization length increased with the MBN content of the sample. Through the above results, we found that SAR containing MBN has antibacterial and remineralization effects. Thus, by adding MBN to the SAR, we investigated the possibility of orthodontic resin development, wherein the strength is enhanced and the drawbacks of the conventional SAR addressed.

scholarly journals Effect of Mosses on physical and chemical properties of soil in temperate forests of Garhwal Himalayas

2021 ◽  
pp. 1-10
Author(s):  
Anshu Siwach ◽  
Siddhartha Kaushal ◽  
Ratul Baishya
Keyword(s):  
Physical Properties ◽  
Chemical Properties ◽  
Nutrient Status ◽  
High Rate ◽  
Physical And Chemical Properties ◽  
Garhwal Himalayas ◽  
Forest Sites ◽  
Significant Difference ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Mosses are one of the most important and dominant plant communities, especially in the temperate biome, and play a significant role in ecosystem function and dynamics. They influence the water, energy and element cycle due to their unique ecology and physiology. The present study was undertaken in three different temperate forest sites in the Garhwal Himalayas, viz., Triyuginarayan (Kedarnath Wildlife Sanctuary (KWLS)), Chakrata, and Kanasar forest range. The study was focused on understanding the influence of mosses on soil physical properties and nutrient availability. Different physico-chemical properties were analysed under two different substrata, that is, with and without moss cover in two different seasons, viz., monsoon and winter. We observed mosses to influence and alter the physical properties and nutrient status of soil in both seasons. All soil physical and chemical properties, except magnesium, showed significant difference within the substrates, among all the sites and across the two seasons. Besides the soil characteristics underneath the moss vegetation, the study also highlights the diversity of mosses found in the area. Mosses appear to create high nutrient microsites via a high rate of organic matter accumulation and retain nutrients for longer periods thus, maintaining ecosystem stability.

scholarly journals Discovery of Genes Related to Witches Broom Disease in Paulownia tomentosa × Paulownia fortunei by a De Novo Assembled Transcriptome

PLoS ONE ◽  
2013 ◽  
Vol 8 (11) ◽  
pp. e80238 ◽  
Author(s):  
Rongning Liu ◽  
Yanpeng Dong ◽  
Guoqiang Fan ◽  
Zhenli Zhao ◽  
Minjie Deng ◽  
...  
Keyword(s):  
De Novo ◽  
Paulownia Tomentosa ◽  
Broom Disease ◽  
Paulownia Fortunei

Anatomical, Chemical and Mechanical Properties of Fast-Growing Populus × Euramericana cv. ‘74/76’

IAWA Journal ◽  
2014 ◽  
Vol 35 (2) ◽  
pp. 158-169 ◽  
Author(s):  
Zhao Rongjun ◽  
Yao Chunli ◽  
Cheng Xianbao ◽  
Lu Jianxiong ◽  
Fei Benhua ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sandy Loam ◽  
Physical And Mechanical Properties ◽  
Wood Properties ◽  
Planting Density ◽  
Dry Density ◽  
Growth Rings ◽  
Fast Growing ◽  
Breast Height ◽  
Large Growth

The anatomical characteristics, chemical composition, and physical and mechanical properties of fast-growing Populus × euramericana cv. ‘74/76’ juvenile wood were investigated. Four- to five-year-old clonal plantation trees were harvested from two different experimental sites in the suburbs of Beijing. The Shunyi site had black alkali soil with a planting density of 4 × 6 m and the Miyun site had sandy loam soil with a planting density of 3 × 5 m. The test results showed that the poplar trees from the two sites were both fast growing, with poplar at Shunyi growing faster than at Miyun. There were no significant differences in wood properties between trees grown at the two sites. Fiber length at breast height varied from 872 to 1300 μm between growth rings, average fiber width varied from 21.0 to 25.5 μm and double wall thickness varied from 5.0 to 6.6 μm. Average cellulose, lignin and hemicellulose contents in the samples were 48.9%, 25.4%, and 18.8%, respectively. MFA was higher in the first two growth rings (20–25°), and then decreased rapidly to 12° close to the bark. The average air-dry density at breast height was 401 kg/m3 while the average MOE at breast height was 9.3 GPa. The trees showed large growth rates in both height and stem diameter during the growing season. However, wood properties of the juvenile poplar appeared to be similar to those of poplars with a slower growth rate.

scholarly journals Properties of Laminated Composite Panels Made from Fast-Growing Species Glued with Mangium Tannin Adhesive

BioResources ◽  
2016 ◽  
Vol 11 (3) ◽  
Author(s):  
Jessica Hendrik ◽  
Yusuf Sudo Hadi ◽  
Muh Yusram Massijaya ◽  
Adi Santoso
Keyword(s):  
Laminated Composite ◽  
Composite Panels ◽  
Tannin Adhesive ◽  
Fast Growing ◽  
Fast Growing Species
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