High lysine and high protein‐containing salinity‐tolerant rice grains ( Oryza sativa cv IR64)

Strength properties of grains have a significant impact on the energy demand of grinding mills. This paper presents the results of tests of strength and energy needed the for destruction of rice grains. The research aim was to experimentally determine mechanical and processing properties of the rice grains. The research problem was formulated in the form of questions: (1) what force and energy are needed to induce a rupture of rice grain of the Oryza sativa L. of long-grain variety? (2) what is the relationship between grain size and strength parameters and the energy of grinding rice grain of the species Oryza sativa L. long-grain variety? In order to find the answer to the problems posed, a static compression test of rice grains was done. The results indicate that the average forces needed to crush rice grain are 174.99 kg m·s−2, and the average energy is 28.03 mJ. There was no statistically significant relationship between the grain volume calculated based on the volumetric mass density Vρ and the crushing energy, nor between the volume Vρ and other strength properties of rice grains. In the case of Vs, a low negative correlation between strength σmin and a low positive correlation between the power inducing the first crack were found for the grain size related volume. A low negative correlation between the grain thickness a3, stresses σmin and work WFmax was found as well as a low positive correlation between thickness a3 and the force inducing the first crack Fmin.

Download Full-text

Evaluation of cadmium (Cd) transfer from paddy soil to rice (Oryza sativa L.) using DGT in comparison with conventional chemical methods: derivation of models to predict Cd accumulation in rice grains

Environmental Science and Pollution Research ◽

10.1007/s11356-020-07976-1 ◽

2020 ◽

Vol 27 (13) ◽

pp. 14953-14962

Author(s):

Wendan Xiao ◽

Xuezhu Ye ◽

Zhiqiang Zhu ◽

Qi Zhang ◽

Shouping Zhao ◽

...

Keyword(s):

Oryza Sativa ◽

Paddy Soil ◽

Oryza Sativa L ◽

Chemical Methods ◽

Cd Accumulation ◽

Rice Grains

Download Full-text

Expressing Arsenite Antiporter PvACR3;1 in Rice (Oryza sativa L.) Decreases Inorganic Arsenic Content in Rice Grains

Environmental Science & Technology ◽

10.1021/acs.est.9b02418 ◽

2019 ◽

Vol 53 (17) ◽

pp. 10062-10069 ◽

Cited By ~ 12

Author(s):

Yanshan Chen ◽

Chen-Yu Hua ◽

Jun-Xiu Chen ◽

Bala Rathinasabapathi ◽

Yue Cao ◽

...

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Inorganic Arsenic ◽

Arsenic Content ◽

Rice Grains

Download Full-text

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

Irriga ◽

10.15809/irriga.2015v20n3p587 ◽

2015 ◽

Vol 20 (3) ◽

pp. 587-601 ◽

Cited By ~ 1

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.

Download Full-text

The Effect of Degree of Milling on the Nutraceutical Content in Ecofriendly and Conventional Rice (Oryza sativa L.)

Foods ◽

10.3390/foods9091297 ◽

2020 ◽

Vol 9 (9) ◽

pp. 1297

Author(s):

Seung-Hyun Kim ◽

Yu-Jin Yang ◽

Ill-Min Chung

Keyword(s):

Oryza Sativa ◽

Antioxidant Activities ◽

Oryza Sativa L ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Brown Rice ◽

Stepwise Discriminant Analysis ◽

Rice Grains ◽

Degree Of Milling

We investigated the effects of the type of rice and degree of milling (DOM) on the nutraceutical content and antioxidant activity of rice (Oryza sativa L.). The fatty acid (FA), vitamin E homolog, and phenolic contents in organic (OR), pesticide-free (PFR), and conventional rice (CR) decreased significantly with an increase in the DOM of rice grains, particularly for a DOM of 7 and 9 (p < 0.05). The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity also decreased with the DOM; particularly, this activity decreased significantly, by approximately 60%, in rice grains with a DOM between 7 and 11, as compared to that of brown rice (p < 0.05). α-Tocopherol (r = 0.854) and p-coumaric acid (r = 0.501) showed the strongest correlation with DPPH activity in each chemical group. Stepwise discriminant analysis enabled the correct original and cross-validated classification of 87.0% and 81.5% of rice types, respectively. Additionally, the original and cross-validated classification of rice DOM levels showed that, overall, 93.8% and 92.6% of rice samples were correctly classified. Our findings reveal variations in the nutraceutical levels and antioxidant activities in rice grains based on the rice type and DOM, which can help improve the nutritional evaluation of human-health-promoting rice grains.

Download Full-text