scholarly journals Relationship between biospeckle laser technique and firmness of Acrocomia aculeata fruits

2017 ◽  
Vol 21 (1) ◽  
pp. 68-73 ◽  
Author(s):  
Anderson G. Costa ◽  
Francisco A. C. Pinto ◽  
Roberto A. Braga ◽  
Sergio Y. Motoike ◽  
Luis M. N. Gracia
Keyword(s):  
Biological Activity ◽  
Maturation Stage ◽  
Fruit Pulp ◽  
Laser Technique ◽  
Palm Fruit ◽  
Optical Instruments ◽  
Non Invasive ◽  
Macaw Palm ◽  
Acrocomia Aculeata ◽  
The Moment

ABSTRACT Knowing the maturation of the Acrocomia aculeata (macaw palm) fruit is decisive for harvest to be performed when the fruit has a higher content and quality of oil. There are different approaches to monitor maturation and they can be classified as destructive and non-destructive. Variables obtained by optical instruments have been used to determine maturation stage. The present study evaluated the relationship between the biological activity measured by the optical technique of biospeckle laser and firmness, measured in the Acrocomia aculeata fruit pulp between the 41st and 61st week after flowering. The biological activity was quantified by biospeckle images, while the fruit pulp firmness was determined by digital penetrometer. Correlations between variables were evaluated during maturation and in the senescence of fruits. According to the results, significant correlation between biological activity and firmness was found for both evaluated conditions, demonstrating that biospeckle laser can be an effective non-invasive indicator of Acrocomia aculeate fruit maturation assisting in the determination of the moment of harvest.

scholarly journals Measurement of volume of macaw palm fruit using traditional and the digital Moiré techniques

2016 ◽  
Vol 20 (2) ◽  
pp. 152-157 ◽  
Author(s):  
Anderson G. Costa ◽  
Elisângela Ribeiro ◽  
Roberto A. Braga ◽  
Francisco A. C. Pinto
Keyword(s):  
Low Cost ◽  
Maturation Stage ◽  
Maturity Stage ◽  
Displacement Method ◽  
Water Displacement ◽  
Palm Fruit ◽  
Macaw Palm ◽  
Moiré Techniques ◽  
Palm Fruits ◽  
Digital Moiré

ABSTRACT The macaw palm crop has been studied because of its bioenergy potential due to the high oil yield, which is linked to fruit maturity stage. Digital images have been adopted as a contactless way to obtain information about fruit surface area and volume, acting as a sensor for quality control and the classification of fruits, based on physical aspects during the maturation stage. The aim of this study was to estimate the volume of macaw palm fruits from digital models obtained by the Moiré technique using only one camera, associated with digital image-processing tools to unwarp the images, allowing the comparison with conventional methods. The volumes obtained by the Moiré technique were compared with those obtained by water displacement method (WDM) and millet-seed displacement method (SDM). The results show that the volumes measured by the Moiré technique exhibited a mean error of 13.54% compared with the SDM, and 11.09% when compared to WDM, which indicates that the digital Moiré technique is a robust, low-cost tool to measure the volume of macaw palm fruits.

scholarly journals BIOSPECKLE LASER TO MONITOR THE GERMINATION OF ANGICO-VERMELHO SEEDS

2020 ◽  
Vol 4 (4) ◽  
pp. 1-9
Author(s):  
José Luís Contado ◽  
Caroline De Faria Silva ◽  
Roberto Alves Braga Júnior
Keyword(s):  
Biological Activity ◽  
Seed Germination ◽  
Cell Activity ◽  
Seed Viability ◽  
Automated Analysis ◽  
Laser Technique ◽  
Ecosystem Recovery ◽  
Non Invasive ◽  
Mature Seeds ◽  
Basic Input

Seed viability is an important parameter in its germination and in the establishment of seedlings, as well as for maintaining a seed bank, mainly for forest seeds, since they are responsible for the maintenance and perpetuation of plant communities and are a basic input for ecosystem recovery and conservation programs. To assess germination, traditional techniques use hundreds of seeds in a destructive manner, obtaining results after many days and can express the analyst’s subjectivity. The use of the Biospeckle Laser to monitor seed germination allows the analysis to be objective, fast, non-invasive, and automated analysis. This work proposed to measure the viability of Angico-Vermelho seeds during the first 72 hours of germination using the Biospeckle Laser with numerical analysis. The results obtained in the first experiment allowed monitoring of biological activity throughout the 72 hours of germination, showing high cell activity in the embryo region already in the first 4 hours of germination. In the second experiment, the results showed greater biological activity in the mature seeds when compared to immature ones during the first 4 hours of germination, also detailing the biological activity in different areas of the Angico-Vermelho seed, reporting a greater biological activity in the embryonic axis region when compared to the endosperm. In conclusion, the Biospeckle Laser technique with numerical AVD analysis can be used to analyze the germination of of A. colubrina already in the first 4 hours of germination, dispensing with traditional methods. This technique allows to study the seed germination in different regions and at different times.

Modal properties of macaw palm fruit-rachilla system: An approach by the stochastic finite element method (SFEM)

2021 ◽  
Vol 184 ◽  
pp. 106099
Author(s):  
Fábio Lúcio Santos ◽  
Francisco Scinocca ◽  
Deisenara de Siqueira Marques ◽  
Nara Silveira Velloso ◽  
Flora Maria de Melo Villar
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stochastic Finite Element Method ◽  
Stochastic Finite Element ◽  
Palm Fruit ◽  
Modal Properties ◽  
Macaw Palm ◽  
Element Method

scholarly journals Effect of drying and soaking fruits and seeds on germination of macaw palm (Acrocomia aculeata [Jacq.] Loddiges ex MART.)

2012 ◽  
Vol 34 (2) ◽  
Author(s):  
Aurélio Rubio Neto ◽  
Fabiano Guimarães Silva ◽  
Juliana De Fátima Sales ◽  
Edésio Fialho dos Reis ◽  
Marcus Vinícius Vieira da Silva ◽  
...  
Keyword(s):  
Macaw Palm ◽  
Acrocomia Aculeata

Modeling and simulation of the dynamic behavior of the macaw palm fruit-rachilla system

SIMULATION ◽  
2021 ◽  
pp. 003754972110437
Author(s):  
Mariana Ribeiro Pereira ◽  
Fábio Lúcio Santos ◽  
Nara Silveira Velloso ◽  
Flora Maria de Melo Villar ◽  
Mateus Resende Rodrigues
Keyword(s):  
Dynamic Behavior ◽  
Elasticity Modulus ◽  
Natural Frequencies ◽  
Three Dimensional ◽  
Palm Tree ◽  
Specific Mass ◽  
Palm Fruit ◽  
Modes Of Vibration ◽  
Macaw Palm ◽  
Three Dimensional Models

The macaw palm ( Acrocomia aculeata) is a palm tree native to tropical forests that stand out due to its great potential for oil production. This study was developed with the objective of constructing a high-fidelity model of the macaw palm fruit-rachilla system for the purpose of simulating its dynamic behavior when subjected to mechanical vibrations. The finite element method was used to determine the natural frequencies and modes of vibration of the system. The three-dimensional models of the fruit-rachilla systems were elaborated using CAD3D Fusion 360 software. The modal properties of the fruit-rachilla systems were obtained based on the models developed by varying the elasticity modulus values of the system. The parameters of greatest influence in the estimation of natural frequencies are the elasticity modulus, especially that of the fruit-rachilla joint, and the specific mass. The models that take into account the three-dimensional strains along the rachilla are the least sensitive to variations in the mechanical properties (elasticity modulus and specific mass) and are shown to be more representative of the actual physical system.

An insight into Asian Palmyra palm fruit pulp: A fluorescent sensor for Fe2+ and Cd2+ ions

2020 ◽  
Author(s):  
Chitra Varadaraju ◽  
Mosae Selvakumar Paulraj ◽  
G. Tamil Selvan ◽  
S. Sri Vijeindran ◽  
R. Mariselvam
Keyword(s):  
Fluorescent Sensor ◽  
Fruit Pulp ◽  
Palm Fruit ◽  
Insight Into

scholarly journals The complete plastome of macaw palm [Acrocomia aculeata (Jacq.) Lodd. ex Mart.] and extensive molecular analyses of the evolution of plastid genes in Arecaceae

Planta ◽  
2018 ◽  
Vol 247 (4) ◽  
pp. 1011-1030 ◽  
Author(s):  
Amanda de Santana Lopes ◽  
Túlio Gomes Pacheco ◽  
Tabea Nimz ◽  
Leila do Nascimento Vieira ◽  
Miguel P. Guerra ◽  
...  
Keyword(s):  
Molecular Analyses ◽  
Macaw Palm ◽  
Acrocomia Aculeata

Histological study of somatic embryogenesis induction on zygotic embryos of macaw palm (Acrocomia aculeata (Jacq.) Lodd. ex Martius)

2008 ◽  
Vol 95 (2) ◽  
pp. 175-184 ◽  
Author(s):  
Elisa Ferreira Moura ◽  
Marília Contin Ventrella ◽  
Sérgio Yoshimitsu Motoike ◽  
Adauto Quirino de Sá Júnior ◽  
Mychelle Carvalho ◽  
...  
Keyword(s):  
Somatic Embryogenesis ◽  
Histological Study ◽  
Zygotic Embryos ◽  
Macaw Palm ◽  
Acrocomia Aculeata

scholarly journals Enzyme activity and reserve mobilization during Macaw palm ( Acrocomia aculeata ) seed germination

2016 ◽  
Vol 30 (3) ◽  
pp. 438-444 ◽  
Author(s):  
Elisa Monteze Bicalho ◽  
Sérgio Yoshimitsu Motoike ◽  
Eduardo Euclydes de Lima e Borges ◽  
Glauciana da Mata Ataíde ◽  
Valéria Monteze Guimarães
Keyword(s):  
Enzyme Activity ◽  
Seed Germination ◽  
Reserve Mobilization ◽  
Macaw Palm ◽  
Acrocomia Aculeata

Extra-terrestrial life in the European Space Agency’s Cosmic Vision plan and beyond

2011 ◽  
Vol 369 (1936) ◽  
pp. 582-593 ◽  
Author(s):  
Malcolm Fridlund
Keyword(s):  
Biological Activity ◽  
European Space Agency ◽  
Major Elements ◽  
Observational Astronomy ◽  
Distant Future ◽  
Cosmic Vision ◽  
Space Agency ◽  
Terrestrial Life ◽  
Exciting Time ◽  
The Moment

Our exciting time allows us to contemplate the moment in the not-too-distant future when we can detect the presence of life on worlds orbiting stars other than our Sun. It will not be easy and will require the development and use of the very latest technologies. It also very probably demands deployment in space of relevant instrumentation in order to carry out these investigations. The European Space Agency has been involved in the studies and development of the required technologies for more than a decade and is currently formulating a roadmap for how to achieve the ultimate detection of signs of life as we know it on terrestrial exoplanets. The major elements of the roadmap consist of the following. First, the search for and detection of terrestrial exoplanets. Here, some progress has been made recently and is reported in this paper. Second, the more and more detailed study of the physical characteristics of such exoplanets. Finally, the search for biomarkers—indicators of biological activity—that can be observed at interstellar distances. The last is probably one of the most difficult problems ever contemplated by observational astronomy.

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