scholarly journals Characterization of Engineering Properties and modeling mass and fruit fraction of wood apple (Limonia acidissima) fruit for post-harvest processing

Author(s):  
Sahithi Murakonda ◽  
Gopesh Patel ◽  
Madhuresh Dwivedi
1981 ◽  
Vol 6 ◽  
Author(s):  
Sudesh K. Singh

ABSTRACTFourteen Canadian clays and clay admixtures were subjected to simulated nuclear waste repository environments. The present work is concerned with the montmorillonite-dominant materials only. The montmorillonite-dominant samples showed significant leaching on interaction with deionized water. On heating the samples at 200°C for 500 hours, montmorillomites lost intermicellar water completely and acquired cusp-like to cylindrical morphologies. The loss of water and the morphological changes in montmorillonites significantly altered the engineering characteristics. Permeability, shrinkage limits, compactability and shear strength varied in response to the dominant exchange cation in the structure of montmorillonites and the presence of other mineral components in the materials. The synthetic granite water reacted with montmorillonites and led to changes in chemical and mineralogical compositions, crystalline state and engineering properties.


2001 ◽  
Vol 34 (1) ◽  
Author(s):  
E.A. Asiedu ◽  
P.Y.K. Sallah ◽  
S. Twumasi-Afriyie ◽  
K. Obeng-Antwi ◽  
K. Ahenkora ◽  
...  

2014 ◽  
Vol 1712 ◽  
Author(s):  
Seyoon Yoon ◽  
Isabel Galan ◽  
Kemal Celik ◽  
Fredrik P. Glasser ◽  
Mohammed S. Imbabi

ABSTRACTCalcium sulfoaluminate (CSA) cements are being developed using a novel processing method having as its objective lowering specific CO2 emissions by ∼50% relative to a Portland cement benchmark. We need to be able to measure the properties of the products. Porosity and permeability measurements help define the engineering properties but their quantification is influenced by the choice of experimental protocols. In the present study we used ordinary Portland cement (PC) paste as a benchmark and hydrated ye’elimite, which is a main component of CSA cements, to understand its pore structure. We report on the use of synchrotron-sourced radiation for µCT (Computerized Tomography) and 3D image re-construction of the internal micro-pore structure of PC and ye’elimite-gypsum pastes. As a comparison, porosity and permeability measurements were traditionally obtained using Mercury Intrusion Porosimetry (MIP). The Mori-Tanaka method and the polynomial statistical model were used to analyze the effects of different 3-D micro-pore structures on mechanical properties. The results show that e micro-pore structures differ considerably between PC and ye’elimite pastes and their bulk modulus is significantly affected by the shapes of their micro-pore structures.


2002 ◽  
Author(s):  
◽  
Kumindra Devrajh Ramsunder

Fusarium species produce toxic mycotoxins that are known to exert adverse health effects in humans and animals. No attempts have been made to establish mycotoxin-producing capabilities of isolates of Fusarium species from bananas exhibiting symptoms of crown rot. Crown rot is one of the most serious post harvest problems in banana and the disease is caused by different fungal species, principally Fusarium species. Banana, which is of great economic significance in growing countries (i.e. Costa Rica, Cameroon, Ecuador) is seriously affected by crown rot and is a major cause of fruit loss


2019 ◽  
Vol 34 (4) ◽  
pp. 592-600
Author(s):  
Myrella Katlhen Da Cunha de Araujo ◽  
Claudomiro Roberto De Araújo Júnior ◽  
Arlindo Modesto Antunes ◽  
Rodrigo de Jesus Silva ◽  
Magnun Antonio Penariol da Silva

CARACTERIZAÇÃO FÍSICA DAS SEMENTES DE URUCUM (Bixa orellana L.), VISANDO PROCESSOS DE PÓS-COLHEITA   MYRELLA KATLHEN DA CUNHA DE ARAUJO1; CLAUDOMIRO ROBERTO DE ARAUJO JÚNIOR2; ARLINDO MODESTO ANTUNES3; RODRIGO DE JESUS SILVA4 E MAGNUN ANTONIO PENARIOL DA SILVA5   1Acadêmica do curso de Engenharia Agrícola, Universidade Federal Rural da Amazônia – UFRA, (PA 451, Km 03, Bairro Açaizal, 68680-000, Tomé-Açu, Pará, Brasil) e [email protected]. 2 Acadêmico do curso de Engenharia Agrícola, Universidade Federal Rural da Amazônia – UFRA, (PA 451, Km 03, Bairro Açaizal, 68680-000, Tomé-Açu, Pará, Brasil) e [email protected]. 3 Professor Assistente do curso de Engenharia Agrícola, Universidade Federal Rural da Amazônia – UFRA, (PA 451, Km 03, Bairro Açaizal, 68680-000, Tomé-Açu, Pará, Brasil) e [email protected]. 4 Professor Adjunto do curso de Engenharia Agrícola, Universidade Federal Rural da Amazônia – UFRA, (PA 451, Km 03, Bairro Açaizal, 68680-000, Tomé-Açu, Pará, Brasil) e [email protected]. 5 Professor Adjunto do Campus de Engenharia Agrícola, Universidade Federal Rural da Amazônia – UFRA, (PA 451, Km 03, Bairro Açaizal, 68680-000, Tomé-Açu, Pará, Brasil) e [email protected].   RESUMO: O urucum demonstra importância econômica na comercialização dos grãos moídos para produção colorífica e de corantes, no entanto, há poucos estudos sobre suas características físicas em processos pós-colheita. Além disso, o intuito deste trabalho foi comparar o ângulo de repouso das sementes em diferentes protótipos. O estudo foi realizado no laboratório da Universidade Federal Rural da Amazônia, Tomé-Açu (PA), para verificar: teor de água, biometria, esfericidade, volume unitário, porosidade e ângulo de repouso. O teor de água utilizou cinco amostras (50 sementes), biometria obteve eixos ortogonais de 100 sementes, e utilizadas 20 sementes para esfericidade e volume unitário. Ainda, obtidas médias em 3 equipamentos de ângulo de repouso, (5 repetições). Como resultado, o teor de água (b.u.) foi baixo, (0 a 10%); a esfericidade variou de 61,45 a 90,66%; volume unitário foi de 0,03 a 0,13 cm3 e as porosidades foram (0,69, 0,77 e 0,78). Os ângulos de repouso nos equipamentos (A- adaptado em relação a B; B- equipamento estabelecido e C- protótipo alternativo) foram, respectivamente: 38,85; 31,92 e 32,14°, não diferindo estatisticamente. Ademais, o estudo buscou trazer informações sobre a espécie e colaborar com trabalhos de construção, operação e adaptação de equipamentos de secagem e armazenamento.   Palavras-chave: esfericidade, porosidade, volume unitário.   PHYSICAL CHARACTERIZATION OF ANNATTO (Bixa orellana L.) SEEDS, AIMED POST-HARVEST PROCESSES   ABSTRACT: Annatto demonstrates economic importance in the commercialization of ground grains for color and dye production; however, there are few studies on their physical characteristics in post-harvest processes. In addition, the aim of this work was to compare the rest angle of seeds in different prototypes. The study was carried out in the laboratory of Federal Rural University of the Amazon, Tomé-Açu (PA), to verify: water content, biometrics, sphericity, unit volume, porosity and angle of repose. The water content used five samples (50 seeds), biometrics obtained orthogonal axes of 100 seeds, and 20 seeds were used for sphericity and unit volume. Still, averages were obtained in 3 equipment of angle of rest (5 repetitions). As result, the water content (b.u.) was low (0 to 10%); sphericity ranged from 61.45 to 90.66%; unit volume was 0.03 to 0.13 cm3 and porosities were 0.69, 0.77 and 0.78. The rest angles in the equipment (A- adapted in relation to B; B- established equipment and C- alternative prototype) were, respectively: 38.85; 31.92 and 32.14°, not differing statistically. In addition, the study sought to bring information about the species and collaborate with construction, operation and adaptation of drying and storage equipment.   Keywords: sphericity, porosity, unit volume.


DYNA ◽  
2018 ◽  
Vol 85 (207) ◽  
pp. 107-112
Author(s):  
Manuel Oviedo-Arbeláez ◽  
Jennifer Lozano-Vera ◽  
Claudia Milena Amorocho-Cruz

The department of Huila is a producer of Castilla blackberry (Rubus glaucus Benth), a perishable fruit in post-harvest, making it necessary to develop processing alternatives in order to extend its shelf life and improve its market price. It was therefore proposed to elaborate a fermented blackberry drink using clarification, maturation, and aging processes. The physiochemical and microbiological parameters were characterized in the different phases. The inoculated yeast generated changes during the fermentation of the blackberry juice reducing the soluble solids to 6.9°Brix and viscosity to 1.5 cP. The alcohol content at the end of the process was of 14.4 alcohol by volume (ABV).


2006 ◽  
pp. 205-210 ◽  
Author(s):  
J. Corrales Garcia ◽  
F. Franco Moreno ◽  
J. Rodriguez Campos
Keyword(s):  

2010 ◽  
Vol 55 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Gang Fu ◽  
Siliang Huang ◽  
Yunfeng Ye ◽  
Yongguan Wu ◽  
Zhenlu Cen ◽  
...  

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