Mechanical and Processing Properties of Rice Grains

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.

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Arsenic in Rice: A New Global Disaster

SRI JNPG COLLEGE REVELATION A JOURNAL OF POPULAR SCIENCE ◽

10.29320/sjnpgrj.v2i01.11037 ◽

2018 ◽

Vol 2 (01) ◽

Author(s):

Debasis Chakrabarty

Keyword(s):

Heavy Metal ◽

Oryza Sativa ◽

Oryza Sativa L ◽

Rice Grain ◽

Staple Food ◽

Food Crop ◽

Asian Countries ◽

Rice Grains ◽

As Toxicity ◽

Essential Food

Rice (Oryza sativa L.) is amidst the great essential food crop that offers a staple food for most of the world’s populace. Arsenic (As) is a carcinogenic heavy metal, which harms human health. In Asian countries, a major source of human As-intake is rice grains and; contamination of paddy soils by As and accumulation of As in rice grains is one of the serious agricultural issues. Hence, it is important to mitigate the effects of As toxicity as much as possible. In an attempt to minimize As accumulation in grains various genes have been introduced in rice. The main objective of this review is to provide an overview of the arsenic problem and various biotechnological methods exploited for reducing As accumulation in rice grain.

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Influence of sewage sludge on yield and mineral contents of rice grain

Bangladesh Journal of Scientific Research ◽

10.3329/bjsr.v26i1-2.20231 ◽

2014 ◽

Vol 26 (1-2) ◽

pp. 57-60 ◽

Cited By ~ 1

Author(s):

ATMM Kamal ◽

MM Islam ◽

MS Hossain ◽

SM Ullah

Keyword(s):

Oryza Sativa ◽

Detection Limit ◽

Sewage Sludge ◽

Oryza Sativa L ◽

Dry Weight ◽

Rice Grain ◽

Mineral Contents ◽

Rice Grains ◽

Sludge Application

Sewage sludge at the rate of 0, 40, 80, 120 and 240 t/ha showed that the number of filled grains per panicle, dry weight of grains and weight of 1000 grains of rice (Oryza sativa L.) were the significantly highest where 240 tons of sewage sludge per hectare was added. The contents of N, P, K, Ca, Mg, Fe, Cu, Zn and Pb in rice grains increased significantly with increasing rate of sewage sludge application, while that of Mn decreased significantly. Chromium, cadmium and nickel contents in the rice grain were below detection limit. DOI: http://dx.doi.org/10.3329/bjsr.v26i1-2.20231 Bangladesh J. Sci. Res. 26(1-2): 57-60, December-2013

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Decreased grain size1, a C3HC4-type RING protein, influences grain size in rice (Oryza sativa L.)

Plant Molecular Biology ◽

10.1007/s11103-020-01096-7 ◽

2021 ◽

Author(s):

Xingjie Zhu ◽

Shengzhong Zhang ◽

Yaping Chen ◽

Changlin Mou ◽

Yunshuai Huang ◽

...

Keyword(s):

Grain Size ◽

Oryza Sativa ◽

Oryza Sativa L

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Organic Fertilizer Titonia Plus and Micro Nutrients Improved Rice (Oryza sativa L.) Production in Koto Panjang and Koto Tingga, Padang City, West Sumatera, Indonesia

Journal of Tropical Crop Science ◽

10.29244/jtcs.7.01.22-27 ◽

2020 ◽

Vol 7 (01) ◽

pp. 22-27

Author(s):

Nalwida Rozen ◽

Gusnidar Gusnidar ◽

Nurhajati Hakim

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Oryza Sativa L ◽

Block Design ◽

Organic Fertilizer ◽

Chemical Fertilizer ◽

Rice Grain ◽

Randomized Block Design ◽

On Farm

A series of on-farm fi eld experiments were conducted in two locations in Padang, Koto Panjang and Koto Tingga, West Sumatera, Indonesia in 2015. The purpose of the experiment was to establish the formula of organic fertilizer derived from Tithonia supplied with micro nutrients, Zn and Mn, on rice. The experiments were conducted using completely-randomized block design with six treatments and three replications. The treatments were P = Tithonia Organic Fertilizer Plus (TOFP) + 3.0 kg Mn.ha-1, Q = TOFP + 3.0 kg Mn.ha-1+ 3.0 kg Zn.ha-1, R = TOFP + 4.5 kg Mn.ha-1 + 6 kg Zn.ha-1, S= TOFP + 4.5 kg Mn.ha-1+ 9 kg Zn.ha-1, T = TOFP only, U = 100% chemical fertilizer only. Treatment with micro nutrients as addition to TOFP (TOFP+ 3.0 kg Mn.ha-1 and TOFP+ 3.0 kg Mn.ha-1+3.0 kg Zn.ha-1) increased rice grain yield by 80 g per clump.

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Efficacy of Fungicides Against Grain Discoloration Disease of Rice

International Journal of Economic Plants ◽

10.23910/2/2020.0367 ◽

2020 ◽

Vol 7 (2) ◽

pp. 073-076

Author(s):

V. A. Patil ◽

◽

P. B. Patel ◽

P. D. Ghoghari ◽

N. K. Kavad ◽

...

Keyword(s):

Oryza Sativa ◽

Field Experiment ◽

Oryza Sativa L ◽

Fungal Disease ◽

Field Conditions ◽

Maturity Stage ◽

Rice Grain ◽

New Combinations ◽

Cereal Crop

Rice (Oryza sativa L.) is one of the important cereal crop grown extensively in Gujarat. It suffers from grain discoloration fungal disease causing heavy losses at maturity stage of rice. A field experiment was laid out with the single and new combinations fungicides against rice grain discoloration disease under field conditions during kharif-2013-14, 2014-15 and 2015-16. Six fungicides at various concentrations were screened against rice grain discoloration disease. The trifloxystrobin 25% + tebuconazole 50% (0.03 %) @ 0.4 g l-1 and propiconazole 25 EC (0.025 %) @ 1.0 ml l-1 was found effective against rice grain discoloration and recorded significantly higher healthy grains.

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