scholarly journals CARACTERIZAÇÃO FÍSICA DAS SEMENTES DE URUCUM (Bixa orellana L.), VISANDO PROCESSOS DE PÓS-COLHEITA

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.

Author(s):  
Songquan Sun ◽  
Richard D. Leapman

Analyses of ultrathin cryosections are generally performed after freeze-drying because the presence of water renders the specimens highly susceptible to radiation damage. The water content of a subcellular compartment is an important quantity that must be known, for example, to convert the dry weight concentrations of ions to the physiologically more relevant molar concentrations. Water content can be determined indirectly from dark-field mass measurements provided that there is no differential shrinkage between compartments and that there exists a suitable internal standard. The potential advantage of a more direct method for measuring water has led us to explore the use of electron energy loss spectroscopy (EELS) for characterizing biological specimens in their frozen hydrated state.We have obtained preliminary EELS measurements from pure amorphous ice and from cryosectioned frozen protein solutions. The specimens were cryotransfered into a VG-HB501 field-emission STEM equipped with a 666 Gatan parallel-detection spectrometer and analyzed at approximately −160 C.


2018 ◽  
Vol 16 (2) ◽  
pp. 219-226
Author(s):  
Sri Rizqi Annisa ◽  
Dewi Larasati ◽  
Endang Bekti K

The aim of this study was to determine the characterization of shredded mureel fish with kluwih substitution on water content, protein content, fiber content and organoleptic (preference for crispness and taste). This study uses a simple Randomized Complete Design (RCD) with the substitution treatment of kluwih and mureel fish, with the following ratio: S1 (240g: 60g), S2 (210g: 90g), S3 (180g: 120g), S4 (150g: 150g), S5 (120g: 180g). Data were analyzed statistically by analysis of variance and if there was a significant effect, further testing was done with BNJ at the level of 5%. The results showed that kluwih substitution in the manufacture of mureel fish shredded had an average: water content of 8.33-10.62%, protein :16.83-22.00%, fiber : 6.79-6.99%, score crispness 2-6.12, taste score 2.6-6.6. Based on the results of the analysis of the variety of kluwih substitutes and mureel fish have a significant effect on water content, protein content and crisp organoleptic test, taste on mureel fish fillet, and no significant effect on fiber content. The best kluwih substitution in S3 treatment with 120 grams of substitute kluwih and 180 grams of mureel fish.


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

1989 ◽  
Vol 35 (10) ◽  
pp. 972-974 ◽  
Author(s):  
Alain Lamarre ◽  
Pierre J. Talbot

The stability of human coronavirus 229E infectivity was maximum at pH 6.0 when incubated at either 4 or 33 °C. However, the influence of pH was more pronounced at 33 °C. Viral infectivity was completely lost after a 14-day incubation period at 22, 33, or 37 °C but remained relatively constant at 4 °C for the same length of time. Finally, the infectious titer did not show any significant reduction when subjected to 25 cycles of thawing and freezing. These studies will contribute to optimize virus growth and storage conditions, which will facilitate the molecular characterization of this important pathogen.Key words: coronavirus, pH, temperature, infectivity, human coronavirus.


1966 ◽  
Vol 13 (9) ◽  
pp. 367-370 ◽  
Author(s):  
TAKAO MURATA ◽  
KUNIYASU OGATA
Keyword(s):  

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