Wyniki wyszukiwania - Biblioteka Nauki

1

The study of operational parameters of rice grain grinding

100%

Tomporowski A.

Ekologia i Technika

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2010

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tom R. 18, nr 6

381-384

EN

An experiment was conducted for the purpose of this study. The aim of the test was to investigate the influence of ground material parameters and multi-disc rice grinding process on the energy efficiency of the process. The results obtained confirmed the accuracy of the assumptions made. Properties of the ground material (rice flour) depend to a great extent on technological parameters, type of tool and humidity of the feed material.

PL

Dla potrzeb niniejszej pracy przeprowadzono eksperyment. Badano wpływ parametrów materiału rozdrabnianego i procesu wielotarczowego rozdrabniania ryżu na energochłonność procesu rozdrabniania. Otrzymane wyniki potwierdziły słuszność przyjętych założeń. Cechy materiału po rozdrabnianiu, uzyskanej mączki ryżowej, zależą w znaczącej mierze od parametrów technologicznych, rodzaju narzędzia i wilgotności wsadu.

2

Confirmation of resistance Monochoria vaginalis (Burm. f.) C. Presl from West Java and Lampung Indonesia to bensulfuron-methyl herbicide

100%

Kurniadie D. , Widianto R. , Widayat D. , Umiyati U. , Nasahi C. , Kurniadie D. , Widianto R. , Widayat D. , Umiyati U. , Nasahi C.

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tom 61

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nr 2

3

Review on Parameters Influencing the Rice Breakage and Rubber Roll Wear in Sheller

100%

Prabhakaran P. , Ranganathan R. , Muthu Kumar V. , Rajasekar R. , Devakumar L. , Pal S. K.

Archives of Metallurgy and Materials

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2017

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tom Vol. 62, iss. 3

1875--1880

EN

The present review deals with parameters influencing the rice breakage during rice milling operations and the effect of rubber roll Sheller in rice husk removal process. The main objective of rice milling system is to remove the husk and bran layer to produce the white rice. In this process, rubber roll sheller is used to remove husk from the grains by friction process. If the rubber material is too soft, there may not be sufficient shear force to husk the paddy. Wear will be minimum for rubber material with high hardness but indeed it pronounce the breakage of rice. Hence, for efficient husking the rubber roll material should possess the balance of physico-mechanical properties. Rice breakage depends on several other parameters like the type of harvest, drying temperature, drying methods, physical characteristics of paddy, husking characteristics, paddy moisture content, rubber roller speed, rubber roll pressure, paddy feed rate and fissures. Rubber roll wear depends on the type of rubber material attached to the roller, feed rate, roller speed, pressure etc.

4

Applicability of Fuzzy and Fuzzy Analytic Hierarchy Process (Fuzzy AHP) Methods to Determine the Optimum Soil Depth in Land Suitability Evaluation for Irrigated Rice

100%

Mahabadi N. Y. , Mahmoud Soltani S.

Polish Journal of Soil Science

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2021

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tom 54

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nr 1

EN

The conventional Boolean logic models of land suitability assessment disregard the continuity concepts of the soil and landscape which might cause inaccurate evaluation and classification. To overcome this uncertainty and consequent constraints, the fuzzy set theories were introduced. Therefore, the current study was undertaken to estimate the optimum soil depth that is used in land suitability evaluation for irrigated rice through the fuzzy sets theory and analytic hierarchy process (fuzzy AHP) in Guilan Province, Iran. The square root and quantitative land suitability evaluation methods were employed to calculate traditional land suitability indices (for depths, 0-25, 0-50, 0-75, and 0-100 cm). Also, fuzzy and fuzzy AHP methods were used to explore new land indices. The Sarma similarity indices were used to compare the results of traditional and fuzzy methods for different soil depths. The results showed that the compatibility percentage between the representative pedons (0-100 cm) and the findings of this research (0-50 and 0-75 cm) were remarkable. Furthermore, the highest compatibility percentage of land suitability class was related to the comparison of these two former depths and 0 to 100 cm depths in each of the two used fuzzy methods. Besides, except for 0-25 cm depths, actual yield revealed a significant and positive correlation with the rest three soil pedon depths. These findings show that considering 0 to 50 cm soil depth might be a relevant alternative as the optimal depth to evaluate land suitability for rice in paddy fields in the Guilan rice-growing area.

5

Heavy Metals Contamination of Local and Imported Rice in Semarang, Central Java, Indonesia

88%

Wahyuningsih N. E. , Setiawan H. , Nabiha P. I. , Kartasurya M. I. , Azam M.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 7

49--60

EN

This study defined the heavy metal concentration in rice, a commonly consumed staple food in Indonesia that is domestically produced and also imported from other countries due to its high demand. A total of six rice samples, comprising of four domestic and two foreign were randomly taken from Semarang stores and analyzed using the Atomic Absorbance Spectrometer (AAS). The laboratory results revealed that three varieties of rice, two from Indonesia (MW and PW; 0.561 and 0.456 mg/kg, each), and one from the United States (B; 0.307 mg/kg), exceeded the Indonesian dietary standard for lead (Pb) (SNI). Furthermore, the concentration of chromium (Cr) in two rice that are imported (B, 0.241 mg/kg and J, 0.723 mg/kg) were greater than the 0.2 mg/kg threshold established by the Chinese government. However, all samples had acceptable levels of As and Hg, and none had detectable levels of Cd. In terms of pH levels, domestically produced rice had a wider range (3.88–5.78) compared to imported rice (4.96–5.68). Although locally grown and imported rice had acceptable levels of LCR, only one local rice sample and two imported rice samples exceeded the Target Hazard Quotient (THQ) as well as Hazard Index (HI) values. In conclusion, consuming heavy metals contamination rice on a regular basis poses carcinogenic as well as non-carcinogenic health risks.

6

NH4plus -mediated protein phosphorylation in rice roots

88%

Zhu X. F. , Cai W. H. , Jung J. H. , Xuan Y. H.

Acta Biologica Cracoviensia. Series Botanica

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2015

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tom 57

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nr 2

7

Quantification of retinyl palmitate, thiamine, niacin, pyridoxine, folic acid, cyanocobalamin, zinc, and iron by chromatographic methods in fortified kernels and fortified rice

88%

Ivarsen E. , Andersen C. P. , Jensen S. M. , Pedersen C. T. , Svaneborg A. K.

Acta Chromatographica

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2021

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tom Vol. 33, no. 2

145--152

EN

This study presents the optimization and validation of methods for the analysis of retinol, thiamine, niacin, pyridoxine, folic acid, cyanocobalamin, zinc, and iron in fortified kernels (coated and extruded) and in fortified rice. The analyses were performed by HPLC-UV/FLD/MS and ICP-OES. The optimized methods showed good resolution of the analyte peaks, excellent recovery (87–108%), reproducibility with relative standard deviation (SD) of analyte content between 1.8 and 11% and high correlation coefficient of the calibration curves (R2 > 0.997). Limit of detection was from 2.8 E-4 mg/kg for pyridoxine to 1.26 mg/kg for zinc and limit of quantification was from 9.2 E-4 mg/kg for pyridoxine to 4.21 mg/kg for zinc. Thereby the optimized methods demonstrated reliability and sensitivity in the detection and quantification of these micronutrients and that they are suitable for routine analysis of fortified kernels (coated and extruded) and fortified rice.

8

An approach to cloning of Pi-b rice blast resistance gene

88%

Rybka K. , Miyamoto M. , Nakamura S. , Kawasaki S.

Acta Physiologiae Plantarum

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1997

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tom 19

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nr 4

EN

A contig of clones from BAC rice genomic library encompassing blast resistance gene Pi-b was constructed. On an average eight clones (8 ± 2.6) were picked up by each marker, which was expected basing on the BAC library size (Nakamura et al. 1997). The 2.4 cM distance between flanking RFLP markers G 1234 and RZ 213 (Miyamoto et al. 1996) was spanned with 4 steps of contig including 25 clones. The physical distance of 370 kb between flanking markers corresponds to a small ratio of physical and genetical distances (155 kb/cM) due to a probable structure of the gene locus near the telomeric end of the chromosome. Markers cosegregating with blast resistance against Magnoporthe grisea were localized in a 2 kb restriction fragment. A new border marker was found on the telomeric side of the Pi-b gene, less than 10 kb from cosegregating markers. No clear marker for the centromeric side of the gene was found but the position of Pi-b rice blast resistant gene was narrowed to within at least 50 kb, which is to our knowledge the most precised estimation of the position of this gene.

9

Economic efficiency of rice farming: a stochastic frontier analysis approach

75%

Kazeem A.

Journal of Agribusiness and Rural Development

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2020

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tom 4[58]

10

Impact of agricultural credit access on agricultural productivity among maize and rice smallholder farmers in Rwanda

75%

Taremwa N. K. , Macharia I. , Bett E. , Majiwa E.

Journal of Agribusiness and Rural Development

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2021

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tom 1[59]

11

Modelling Irrigation Regimes of Different Varieties of Rice with AquaCrop Software

75%

Markovska O. Y. , Dudchenko V. V.

Ecological Engineering & Environmental Technology

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2021

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tom Vol. 22, iss. 5

103--109

EN

The article presents the results of the application of modern information technologies, which allow agricultural producers to precisely control the dynamics of water consumption at the level of irrigation system, farmland and individual fields of rice crop rotations under the conditions of drip irrigation. The use of computer programs enables optimization of irrigation regimes and delivers savings in terms of water, energy, technical means and labor resources, contributing to an increase in yields and improvements of their quality, increases in economic efficiency and environmental safety of agriculture on irrigated lands. As a part of SRW "Development and improvement of irrigation regimes of rice and related crops of rice crop rotation on the basis of normalization of irrigation water and determination of the dynamics of evapotranspiration at the field level", AquaCrop software was used to model the productivity of rice under conditions of drip irrigation. The results of research on the topic of improvement of technological processes for growing modern varieties of rice in order to enhance seeding and harvesting properties, which were conducted in 2017 at the Institute of Rice NAAS, were used as experimental data. Indicator data, including temperature, wind speed and precipitation in 2017 were obtained from the local weather station, whereas information on the duration of the sunny day, local coordinates etc. was gleaned from Internet resources. AquaCrop models water and nutrient consumption to achieve desired yields and establish response to optimal and resource-saving irrigation of crops with different biological parameters, including rice. Components of the cultivation process of different rice varieties were established with simulation modeling. Convenience, accuracy and reliability of the developed model for management, modeling and decision-making from the perspective of yield formation of Vicont, Premium and Ukraine-96 rice varieties as well as development of irrigation regimes for effective agricultural production were demonstrated. Adaptation of the information provided by AquaCrop on studied rice varieties allowed automatic and sufficiently accurate generation of biologically optimal irrigation regimes for Vicont, Premium and Ukraine-96. Yields and water productivity of aforementioned rice varieties were also compared in the experiment, with the highest values for both parameters achieved by Vicont – 9.5 t/ha and 1.29 kg/m3, respectively.

12

Modelling and analysis of compressive strength properties of parboiled paddy and milled rice

75%

Nasirahmadi A. , Abbaspour-Fard M. A. , Emadi B. , Khazaei N. B.

International Agrophysics

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2014

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tom 28

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nr 1

EN

.

13

Impact of Zinc Oxide Nanoparticles on Seed Germination Characteristics in Rice (Oryza sativa L.) Under Salinity Stress

75%

Singh A. , Sengar R. S. , Rajput V. D. , Agrawal S. , Ghazaryan K. , Minkina T. , Al Tawaha A. R. M. , Al Zoubi O. M. , Habeeb T.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 10

142--156

EN

An exciting new window of opportunity has opened up for environmentally responsible farming with the advent of the nanotechnology era: the role of nanoparticles (NPs) to mitigate abiotic stresses. NPs have unique physiochemical characteristics that make them an attractive study subject. Rice growth and yield are severely inhibited by salinity, a major detrimental abiotic factor. However, the impact of NPs on rice seeds germination characteristics and physio-biochemical phenomena under salt stress conditions remains poorly understood. Accordingly, we intended to look at how zinc oxide nanoparticles (ZnO-NPs) affected germination processes and the early seedling stage while the rice plants (Kargi and CSR 30 rice genotypes) were put under salinity stress. Different germination characteristics parameters were considered, e.g., germination percentage (GP) relative seed germination rate (RGR), and seed vigour index (SVI) determined after eight days of treatment with ZnO-NPs at a concentration of 50 mg/L on rice seed. After passing the germination test, the seeds were placed in Hoagland hydroponic solution and given another week of ZnO-NPs treatment to evaluate the seedling growth and phyto-biochemical characteristics, such as shoot height and root length, inhibition percentage of shoot height and root length, chlorophyll and carotenoid stability index, chlorophyll and carotenoid inhibition percentage, malondialdehyde (MAD) content and antioxidant enzymatic activities (SOD, APX).This investigation demonstrated that 50 mg/L ZnO-NPs have the potential to alleviate the effect of salt stress on rice genotypes during the germination stage.

14

Estimating crop coefficient model for upland rice (NERICA) under sprinkler irrigation system

75%

Akinbile C. O. , Sangodoyin A. Y.

Annual Review of Agricultural Engineering

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2009

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tom 07

|

nr 1

15

Wpływ obróbki termicznej na siłę zgniatania ziaren ryżu

75%

Ślaska-Grzywna B.

Inżynieria Rolnicza

|

2003

|

tom R. 7, nr 8

393--399

PL

Celem pracy było określenie wpływu obróbki termicznej na zmiany wartości siły zgniatania pojedynczych ziaren trzech rodzajów ryżu. Do badań wykorzystano ryż brązowy, ryż biały oraz ryż długoziarnisty preparowany termicznie. Nasiona poddawano obróbce mikrofalami o mocy 800 W i 1000 W przez 11 i 16 minut oraz gotowaniu tradycyjnemu w wodzie przez 30 minut, w zależności od rodzaju ryżu. Po obróbce termicznej pojedyncze nasiona poddano zgniataniu. Stwierdzono, że czas obróbki do uzyskania jednakowej wartości siły zgniatania uzależniony był od rodzaju ryżu oraz rodzaju i czasu obróbki termicznej. Obróbka mikrofalowa zarówno 800 jak i 1000 W pozwalała na osiągnięcie tej samej wartości siły zgniatania w krótszym czasie niż gotowanie tradycyjne dla wszystkich rodzajów ryżu.

EN

The study aimed at determining the effect of thermal processing on changes in force crushing the single grains for three kinds of rice. Brown rice, white rice and long-grain rice were used in the experiment. Rice grains were treated with microwaves of 800 and 1000 Watt power for 11 and 16 minutes and traditionally boiled in water for 30 minutes. After thermal treatment the single rice grains were tested for crushing force. It was found that the time of processing until obtaining the same value of crushing force depended on the kind of rice, kind and time of applied thermal treatment. Identical force crushing rice grain was achieved in shorter time after microwave processing at both, 800 and 1000 Watt, than after traditional boiling in water for all kinds of tested rice grains.

16

Effects of climate change on rice production at Khulna District, Bangladesh

75%

Hossain N. , Saifullah A. S. M. , Bhuiyan S. H. , Uddin N. , Rahman M.

Environment, Earth and Ecology

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2019

|

tom 3

|

nr 1

17

Application of response surface methodology (RSM) in the optimization of infrared treatment conditions for pasting properties of rice

75%

Basman A. , Yalcin S.

Polish Journal of Food and Nutrition Sciences

|

2011

|

tom 61

|

nr Suppl.1

18

Pochodne ryżu jako substancje dodatkowe do żywności

75%

Rutkowski A.

Przemysł Spożywczy

|

2008

|

tom T. 62, nr 8

76-81

PL

Skrobia i mąka ryżowa są wartościowymi dodatkami do żywności wywodzącymi się z jednego z najcenniejszych surowców żywnościowych - ryżu. Specyficzna struktura molekularna powoduje, że skrobia ryżu charakteryzuje się unikalnymi właściwościami: delikatną strukturą żelu, kremistością odczuwalną w ustach, dużą stabilnością termiczną, dużą lepkością w temperaturze kleikowania i stabilnością lepkości w niskiej temperaturze. Te naturalne właściwości funkcjonalne skrobi ryżu, a także wysoka strawność, "czysty" smak i brak glutenu są cennymi elementami, dla których produkty ryżowe znajdują wiele zastosowań w produkcji żywności.

EN

Rice starch and flour are valuable food additives, deriving from one of the most precious raw food materials --rice. Specific molecular structure causes that rice starch is characterized by unique properties: delicate gel structure, mouthful creaminess, high thermal stability, high viscosity at grueling temperature and stability of viscosity at a low temperature. These natural functional properties of rice starch as well as high digestibility, "pure taste" and lack of gluten are valuable elements due to which rice products find many applications in food production.

19

Defense responses of rice plant to Monographella albescens attack

75%

Almas D. E. , Kamrodi A. R. , Almas D. E. , Kamrodi A. R.

Journal of Plant Protection Research

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2019

|

tom 59

|

nr 4

20

Physical properties of two rough rice varieties affected by moisture content

75%

Ashtiani Araghi H. , Sadeghi M. , Hemmat A.

International Agrophysics

|

2010

|

tom 24

|

nr 2

205-207