scholarly journals Avaliação da qualidade da madeira das espécies Acacia crassicarpa, Acacia mangium, Eucalyptus nitens, Eucalyptus globulus e Populus tremuloides

2009 ◽  
Author(s):  
Fernanda Schablatura Antunes
Keyword(s):  
Populus Tremuloides ◽  
Eucalyptus Globulus ◽  
Acacia Mangium ◽  
Eucalyptus Nitens ◽  
Acacia Crassicarpa

scholarly journals Wound wood formation in Eucalyptus globulus and Eucalyptus nitens: anatomy and chemistry

2003 ◽  
Vol 33 (12) ◽  
pp. 2331-2339 ◽  
Author(s):  
Alieta Eyles ◽  
Noel W Davies ◽  
Caroline Mohammed
Keyword(s):  
Eucalyptus Globulus ◽  
Wound Repair ◽  
Wood Formation ◽  
Negative Ion ◽  
Eucalyptus Nitens ◽  
Diverse Range ◽  
Wound Site ◽  
Formylated Phloroglucinol Compounds ◽  
Wood Extracts ◽  
Volatile Terpenes

The wound-associated wood that developed 17 months following artificial xylem injury in Eucalyptus globulus (Labill) and Eucalyptus nitens (Maiden) was examined anatomically and chemically. This new tissue located immediately adjacent to the wound site and termed "wound wood" was highly variable consisting of callus, altered wood of increased parenchyma density, and dark extractives, visible to the naked eye. Subsequent chemical analysis of crude wound wood extracts by HPLC coupled to negative ion electrospray mass spectrometry revealed the presence of a diverse range of polyphenolic compounds including hydrolysable tannins, proanthocyanidins, flavanone glycosides, and formylated phloroglucinol compounds. A number of polyphenols were unequivocally identified including engelitin, pedunculagin, and tellimagrandin I. Other compounds present in wound wood include various hydroxystilbene glycosides and volatile terpenes. The importance of the diverse range of secondary metabolites detected in wound wood is discussed in relation to tree wound repair responses.

Overexpression of an SKn-dehydrin gene from Eucalyptus globulus and Eucalyptus nitens enhances tolerance to freezing stress in Arabidopsis

Trees ◽  
2016 ◽  
Vol 30 (5) ◽  
pp. 1785-1797 ◽  
Author(s):  
Paula Aguayo ◽  
Javiera Sanhueza ◽  
Felipe Noriega ◽  
Margaret Ochoa ◽  
Regis Lefeuvre ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Freezing Stress ◽  
Eucalyptus Nitens ◽  
Dehydrin Gene

scholarly journals Diversité Et Structure Floristiques Sous Des Peuplements d’Acacias Australiens En Zone Forestière De La Côte d’Ivoire

2016 ◽  
Vol 12 (35) ◽  
pp. 229
Author(s):  
Kouadio Kouassi Richard ◽  
Bakayoko Adama ◽  
N’guessan Kanga Anatole ◽  
Konan Djezou
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Acacia Mangium ◽  
Research Station ◽  
Cote D’Ivoire ◽  
Acacia Species ◽  
Côte D'ivoire ◽  
African Flora ◽  
Acacia Crassicarpa ◽  
The Impact

Since thirty years, four Australian Acacias species are introduced and studied in Anguédédou Research station. The station research is located in evergreen forest in the south of Côte d'Ivoire. The objective of the introduction of these species, is to rehabilitate degraded grounds and fallow after growing. The study aims at appreciating the impact of Acacia species on floristic diversity and the regeneration of forest species. For collecting data, we use quadrat method (35 x 50 m and 6 x 6 m).This method permitted the inventory of 212 species on 1.05 ha. Among these species, 1.89 % are Ivorian endemic species and 11.32 % are endemic of West African flora. The flora under the different species of Acacia are relatively diversified and dense. The majority of plant inventoried under Acacia species have small diameters. The highest specific richness average per plots (36 m2) were noted in the 11 years old parcels of Acacia mangium (26.20±2.34) and 27 years old parcels of Acacia auriculaeformis (25.40±2.34) and Acacia crassicarpa (30.60±2.34). The mean values of diameters (dbh ≥ 2.5 cm) fluctuate from 2.94±0.56 cm for the 8 years old stands of Acacia mangium to 8.09±0.56 cm for the 27 years old settlements of Acacia crassicarpa. The results show that leguminous trees can be used for recolonization of the deforested areas in order to rebuild quickly their plant biodiversity.

scholarly journals Informe Técnico 148: Modelo de crecimiento para eucalipto en Chile. (Avances de investigación)

2000 ◽  
Author(s):  
Carlos Bahamóndez V. ◽  
◽  
Mauro Ernesto Ferrando Toso ◽  
Marjorie Caroline Martin Stuven ◽  
Juan Carlos Pinilla Suárez
Keyword(s):  
Eucalyptus Globulus ◽  
Eucalyptus Nitens

Documento que contiene el trabajo desarrollado por Infor en la actualización y escalamiento de las funciones que componen el modelo de crecimiento para eucalipto: crecimiento en altura, mortalidad natural, rendimiento en área basal y predicción del volumen; utilizando la información generada a través de los proyectos desarrollados por Infor y Fundación Chile. Además, se describen los antecedentes utilizados para generar dichas funciones. especie) con los de versiones anteriores (EUCA2.1). Finalmente, se hace hincapié en la necersidad de mantener actualizadas las bases de datos para realizar nuevos escalamientos. En t érminos de distribucion de edades, prácticamente toda la información se concentra entre los 2-12 años para Eucalyptus globulus y 2-7 años para Eucalyptus nitens.

Production of Cellulose Nanocrystals from Australian Wood Sources

2020 ◽  
Vol 20 (9) ◽  
pp. 5642-5647
Author(s):  
Lachlan Thompson ◽  
Mostafa Nikzad ◽  
Igor Sbarski ◽  
Jalal Azadmanjiri ◽  
Jiawen Ren ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Acid Hydrolysis ◽  
Cellulose Nanocrystals ◽  
Chemical Treatment ◽  
Eucalyptus Globulus ◽  
Acacia Mangium ◽  
Kraft Pulps ◽  
High Yields

Two Australian native wooden sources (Acacia Mangium and Eucalyptus Globulus) derived pulps were explored as raw feed stocks to prepare the valuable nanomaterial of cellulose nanocrystals (CNC). After bleaching and acid hydrolysis, cellulose nanocrystals were successfully produced with high yields of approximately 60% for both kraft pulps. According to the characterization of SEM and AFM, the as prepared CNC had a rod like structure with the length and diameter in the range of 200~1000 nm and 10~100 nm, respectively based on the initial wooden source. XRD confirmed the crystalline structure of the resulting CNC. Further characterisation by TGA showed that the chemical treatment of the wood pulp had impact upon the thermal stability, evidenced by a lower onset temperature of the thermal decomposition of CNC.

Sign in / Sign up

Export Citation Format

Share Document