scholarly journals Diurnal Variations of Moisture Content, Weight and Volume of Unhulled Rice Grains

1932 ◽  
Vol 4 (4) ◽  
pp. 327-336
Author(s):  
Tamotsu OKAMURA
Keyword(s):  
Moisture Content ◽  
Diurnal Variations ◽  
Rice Grains

scholarly journals QUALIDADE INDUSTRIAL DE GRÃOS DE ARROZ DECORRENTE DA SUPRESSÃO DA IRRIGAÇÃO E UMIDADE DE COLHEITA

Irriga ◽  
2015 ◽  
Vol 20 (3) ◽  
pp. 587-601 ◽  
Author(s):  
GUILHERME PILAR LONDERO ◽  
Enio Marchesan ◽  
Evandro Parisotto ◽  
Lucas Lopes Coelho ◽  
Camille Flores Soares ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Moisture Content ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Irrigated Rice ◽  
Milling Quality ◽  
Rice Grains ◽  
Santa Maria ◽  
E Mail

QUALIDADE INDUSTRIAL DE GRÃOS DE ARROZ DECORRENTE DA SUPRESSÃO DA IRRIGAÇÃO E UMIDADE DE COLHEITA  GUILHERME PILAR LONDERO¹; ENIO MARCHESAN²; EVANDRO PARISOTTO³; LUCAS LOPES COELHO4, BRUNO BEHENCK ARAMBURU4; CAMILLE SOARES FLORES4 E ANELISE LENCINA DA SILVA4 1 Mestrando do Programa de Pós-Graduação em Agronomia, Universidade Federal de Santa Maria, Av. Roraima nº 1000, 97105-900, Santa Maria/RS, e-mail: [email protected];2 Professor Titular do Departamento de Fitotecnia, Universidade Federal de Santa Maria, Av. Roraima nº 1000, 97105-900, Santa Maria/RS, e-mail: [email protected];3 Desenvolvimento de Mercado, Ricetec Sementes Ltda., Rua 18 de novembro nº 341, 90240-040, Porto Alegre/RS, e-mail: [email protected]. 4 Graduando em Agronomia, Universidade Federal de Santa Maria, Av. Roraima nº 1000, 97105-900, Santa Maria/RS, e-mails: [email protected]; [email protected]; [email protected]; [email protected].  1           RESUMO A qualidade dos grãos do arroz irrigado é fator fundamental para sua comercialização. Neste sentido, objetivou-se avaliar, com a realização do presente estudo, a qualidade industrial de grãos de dois cultivares de arroz irrigado em função de épocas de supressão da irrigação e graus de umidade à colheita. O experimento foi realizado nas safras 2011/12 e 2012/13 na área didático experimental de várzea da Universidade Federal de Santa Maria, Rio Grande do Sul. Os tratamentos foram compostos de: dois cultivares: o híbrido INOV CL e o cultivar Puitá INTA CL; quatro épocas de supressão da irrigação: 5, 15, 25 e 35 dias após a antese (DAA); e cinco graus de umidade média dos grãos na colheita: 24, 22, 20, 18 e 16%. O delineamento experimental foi de blocos ao acaso com quatro repetições por tratamento. O cultivar Puitá INTA CL apresenta superior qualidade em relação a grãos inteiros, vítreos, gessados e opacos ao híbrido INOV CL. A umidade adequada dos grãos à colheita para ambos cultivares ocorre no intervalo de 24 a 20%. A supressão de irrigação não interfere na qualidade de grãos inteiros, vítreos, opacos e gessados. Palavras-Chave: beneficiamento; grão inteiro; grão gessado; grão opaco; Oryza sativa L.  LONDERO, G. P.¹; MARCHESAN, E.²; PARISOTTO, E.³; COELHO, L. L.4; ARAMBURU, B. B.4; FLORES, C. S.4; da SILVA, A. L. 4INDUSTRIAL QUALITY OF RICE GRAINS ARISING FROM THE WITHHOLDING OF IRRIGATION AND HARVEST MOISTURE  2           ABSTRACT Quality of irrigated rice grains is critical for their marketing. In this context, the study aimed to evaluate the industrial quality of two irrigated rice cultivars as a function of two times of irrigation withholding,   and moisture content at harvest.  The experiment was conducted during the 2011/12 and 2012/13 seasons in the experimental floodplain of the Federal University of Santa Maria, Rio Grande do Sul state, Brazil. The treatments consisted of  two cultivars:   hybrid INOV CL and  Puitá INTA CL ; four irrigation withholding times:  5, 15, 25 and 35 days after anthesis (DAA); and five levels of mean grain moisture   at harvest; 24, 22, 20, 18 and 16 %. The experimental design was randomized blocks with four replicates per treatment.   The cv. Puitá INTA CL  presented higher quality concerning milling, translucency, opacity and chalky grains than the cv. hybrid INOV CL.  Suitable moisture content of grains at harvest for both cultivars is at the range of 24 to 20%.  Irrigation withholding did not affect milling quality, translucency, opacity and chalky grains. Keywords: Processing, milling quality, chalky grain, opacity, Oryza sativa. 

scholarly journals Mechanical properties of rough and dehulled rice during drying

2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Osvaldo Resende ◽  
Paulo César Corrêa ◽  
Gabriel Henrique Horta de Oliveira ◽  
André Luis Duarte Goneli ◽  
Carmen Jarén
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Uniaxial Compression ◽  
Compression Test ◽  
Rupture Force ◽  
Compression Force ◽  
Rice Grains ◽  
Moisture Contents ◽  
Rough Rice ◽  
Value Range

This work aimed to determine the mechanical properties of rough and dehulled rice grains, for different moisture contents, by obtaining their rupture force, deformation, maximum compression force and proportional deformity modulus under a compression test. Rice grains, with moisture content varying from 0.12 to 0.30 (d.b.), were subject to an uniaxial compression in order to analyze these properties. On reducting moisture content the rupture force increased from 37.2 to 70.6 N for dehulled rice and 48.0 to 79.5 N for rough rice. The average compression force varied from 131 to 171 N for dehulled rice and 203 to 283 N for rough rice. The value range of proportional deformity modulus was from 5.5 x 109 to 7.4 x 109 Pa for dehulled rice and 9.5 x 109 to 12.3 x 109 Pa for rough rice. Rough rice presented more resistance to compression compared to dehulled rice.

Rough Rice Grain Drying (BRSMG CONAI) at Temperatures of 60 and 80°C in Oven

2016 ◽  
Vol 369 ◽  
pp. 148-151
Author(s):  
J.V. Silva ◽  
C.M.R. Franco ◽  
E.M.A. Pereira ◽  
T.H.F. Andrade ◽  
A.G. Barbosa de Lima
Keyword(s):  
Moisture Content ◽  
Oryza Sativa L ◽  
Brown Rice ◽  
Practical Method ◽  
Rice Grain ◽  
Rice Grains ◽  
Mass Transfer Processes ◽  
Rough Rice ◽  
Grain Drying ◽  
Drying Conditions

Rice (Oryza sativa L.) is a greatly important socio-economic crop. Immediate threshing and drying of wet harvested grains, to reach 18–19% (w.b) moisture content, is a practical method used by individual farmers to slow deterioration and increase selling prices. However, rough rice grain is different from other grains because it has an outer cover shell (palea and lemma) and a bran layer. Thus, the heat and mass transfer processes that take place during grain drying are different from those of other cereal grains, so understanding the effect of different treatments, drying temperature, moisture content and the gradients in rice grains is essential to optimize the drying conditions. In this sense, the current study aims to analyze the moisture removal and its effects on the stress cracking and the number of brown rice grains (BRSMG CONAI variety) at the temperatures of 60 and 80°C.

Functional Properties of Re-fabricated Rice as Affected by Die During Extrusion Process

2014 ◽  
Vol 10 (3) ◽  
pp. 417-426
Author(s):  
Syed Zameer Hussain ◽  
Baljit Singh
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Sensory Evaluation ◽  
Functional Properties ◽  
Extrusion Process ◽  
Rice Grains ◽  
Extrusion Die ◽  
Breadth Ratio ◽  
Rice Samples ◽  
Determinant Factor

Abstract In order to obtain re-fabricated rice with properties similar to natural rice, a special cutter and six dies were designed and evaluated. All the dimensional and physical properties of re-fabricated rice were significantly affected by die type. The average values of all the properties studied increased with the increase in moisture content (from 10 to 14%), except length/breadth ratio and porosity which decreased with the increase in moisture content. Based on the dimensional and physical properties, the re-fabricated rice obtained through die IV (8 × 1.5 mm) was in close resemblance to natural rice (PR-116). In general, uncooked and cooked re-fabricated rice grains showed significantly harder and firm texture in comparison to natural rice. Furthermore, significant differences were observed with respect to colour, whiteness and translucence between re-fabricated rice samples and natural rice. Sensory evaluation data revealed significant decrease in oral tenderness and adhesiveness in re-fabricated rice against natural rice. The study demonstrated that appropriate design of extrusion die is determinant factor for developing re-fabricated rice with properties similar to natural rice.

scholarly journals Two Types of Diurnal Variations in Heavy Rainfall during July over Korea

2021 ◽  
Author(s):  
Chang-Kyun Park ◽  
Minhee Chang ◽  
Chang-Hoi Ho ◽  
Kyung-Ja Ha ◽  
Jinwon Kim ◽  
...  
Keyword(s):  
Moisture Content ◽  
Diurnal Variation ◽  
North Pacific ◽  
Western North Pacific ◽  
Heavy Rainfall ◽  
Diurnal Variations ◽  
Upward Motion ◽  
Mesoscale Circulations ◽  
Active Convection ◽  
Heavy Rainfalls

AbstractThis study examined the characteristics of the diurnal variations of heavy rainfall (⩾110 mm in 12 hours) in Korea and the related atmospheric circulation for July from 1980–2020. During the analysis period, two dominant pattens of diurnal variation of the heavy rainfall emerged: all-day heavy rainfall (AD) and morning only heavy rainfall (MO) types. For the AD-type, the heavy rainfall is caused by abundant moisture content in conjunction with active convection in the morning (0000–1200, LST; LST = UTC + 9) and the afternoon hours (1200–2400 LST). These systems are related to the enhanced moisture inflow and upward motion induced by the strengthening of the western North Pacific subtropical high and upper-tropospheric jet. For the MO-type, heavy rainfall occurs mostly in the morning hours; the associated atmospheric patterns are similar to the climatology. We find that the atmospheric pattern related to severe heavy rainfalls in 2020 corresponds to a typical AD-type and resembles the 1991 heavy-rainfall system in its overall synoptic/mesoscale circulations. The present results imply that extremely heavy rainfall episodes in Korea during the 2020 summer may occur again in the future associated with the recurring atmospheric phenomenon related to the heavy rainfall.

Cover crop residue moisture content controls diurnal variations in surface residue decomposition

2021 ◽  
Vol 308-309 ◽  
pp. 108537
Author(s):  
Resham Thapa ◽  
Katherine L Tully ◽  
Miguel Cabrera ◽  
Carson Dann ◽  
Harry H. Schomberg ◽  
...  
Keyword(s):  
Moisture Content ◽  
Cover Crop ◽  
Crop Residue ◽  
Diurnal Variations ◽  
Surface Residue ◽  
Residue Decomposition

scholarly journals Equilibrium Relationship between Moisture Content of Rice Grains for Sake Making and Vapor Pressure of Water

1988 ◽  
Vol 83 (8) ◽  
pp. 565-566
Author(s):  
Shigetoshi SUDO ◽  
Youichi OGATA ◽  
Eiji SANO ◽  
Yasuo SAITO ◽  
Kou ITO
Keyword(s):  
Moisture Content ◽  
Vapor Pressure ◽  
Rice Grains ◽  
Equilibrium Relationship
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