Water uptake and storage by rhizosheaths of Oryzopsis hymenoides: a numerical simulation

This study investigated methods to overcome seed dormancy in Crataegus pseudoheterophylla Pojarkova seeds. Seeds with and without endocarps were treated with gibberellic acid (GA3) at different concentrations and four storage temperatures. Then they were stratified in an alternate temperature regime. The amount of absorbed water in seeds with endocarps was monitored by measuring the fresh weight of seeds for 0, 24, 48, 72, and 96 h of imbibition. The electrical conductivity (EC) and the percentage of water uptake by seeds stored for 12 months at laboratory temperature, in a refrigerator, in a freezer, and in freeze-thaw conditions were measured. The highest germination (59.7%) was recorded in seeds without endocarps treated with 3,000 mg·l–1 GA3 and stored either in a laboratory or a refrigerator (32.7–35.3%). All treatments of seeds without endocarps where GA3 was applied showed statistically higher percentages of germination than the control. Seeds with endocarps stored at refrigerator temperature imbibed water up to 44.3% with increasing imbibition periods, whereas the amount of seeds that absorbed water in freezer and freeze-thaw conditions was almost the same. The tests showed the highest EC during storage in the freezer, with the lowest water uptake and viability in seeds stored during the freeze-thaw process.

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Water Influx through the Wetted Surface of a Sweet Cherry Fruit: Evidence for an Associated Solute Efflux

Plants ◽

10.3390/plants9040440 ◽

2020 ◽

Vol 9 (4) ◽

pp. 440

Author(s):

Andreas Winkler ◽

Deborah Riedel ◽

Daniel Alexandre Neuwald ◽

Moritz Knoche

Keyword(s):

Water Uptake ◽

Sweet Cherry ◽

Dry Mass ◽

Bathing Solution ◽

Full Bloom ◽

Stage Of Development ◽

Water Influx ◽

Fruit Skin ◽

Sweet Cherries ◽

And Storage

Sweet cherries are susceptible to rain-cracking. The fruit skin is permeable to water, but also to solutes. The objectives of this study were to (1) establish whether a solute efflux occurs when a sweet cherry fruit is incubated in water; (2) identify the solutes involved; (3) identify the mechanism(s) of efflux; and (4) quantify any changes in solute efflux occurring during development and storage. Solute efflux was gravimetrically measured in wetted fruit as the increasing dry mass of the bathing solution, and anthocyanin efflux was measured spectrophotometrically. Solute and anthocyanin effluxes from a wetted fruit and water influx increased with time. All fluxes were higher for the cracked than for the non-cracked fruit. The effluxes of osmolytes and anthocyanins were positively correlated. Solute efflux depended on the stage of development and on the cultivar. In ‘Regina’, the solute efflux was lowest during stage II (25 days after full bloom (DAFB)), highest for mid-stage III (55 DAFB), and slightly lower at maturity (77 DAFB). In contrast with ‘Regina’, solute efflux in ‘Burlat’ increased continuously towards maturity, being 4.8-fold higher than in ‘Regina’. Results showed that solute efflux occurred from wetted fruit. The gravimetrically determined water uptake represents a net mass change—the result of an influx minus a solute efflux.

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Numerical Simulation and Experimental Study of Deep Bed Corn Drying Based on Water Potential

Mathematical Problems in Engineering ◽

10.1155/2015/539846 ◽

2015 ◽

Vol 2015 ◽

pp. 1-13 ◽

Cited By ~ 2

Author(s):

Zhe Liu ◽

Zidan Wu ◽

Xiaomeng Wang ◽

Jia Song ◽

Wenfu Wu

Keyword(s):

Numerical Simulation ◽

Water Potential ◽

Influential Factor ◽

Vacuum Drying ◽

Agricultural Field ◽

Application Range ◽

Grain Drying ◽

Drying System ◽

Drying Model ◽

And Storage

The concept and the model of water potential, which were widely used in agricultural field, have been proved to be beneficial in the application of vacuum drying model and have provided a new way to explore the grain drying model since being introduced to grain drying and storage fields. Aiming to overcome the shortcomings of traditional deep bed drying model, for instance, the application range of this method is narrow and such method does not apply to systems of which pressure would be an influential factor such as vacuum drying system in a way combining with water potential drying model. This study established a numerical simulation system of deep bed corn drying process which has been proved to be effective according to the results of numerical simulation and corresponding experimental investigation and has revealed that desorption and adsorption coexist in deep bed drying.

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Water uptake by substituted amylose tablets: experimentation and numerical simulation

Drug Development and Industrial Pharmacy ◽

10.3109/03639040903173556 ◽

2010 ◽

Vol 36 (4) ◽

pp. 371-378 ◽

Cited By ~ 1

Author(s):

H.W. Wang ◽

S. Kyriacos ◽

L. Cartilier

Keyword(s):

Numerical Simulation ◽

Water Uptake

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The effect of cyclical stimulation on the primary neurons of Bombyx Mori

10.7287/peerj.preprints.26769 ◽

2018 ◽

Author(s):

Yeti Zuko ◽

Kazuo Maeda

Keyword(s):

Numerical Simulation ◽

Water Potential ◽

Bombyx Mori ◽

Low Voltage ◽

Primary Neurons ◽

Change Rate ◽

Silk Production ◽

Simulation Results ◽

Free Media ◽

And Storage

Changes to the Silkworm axon initiation segment in frequently firing neurons are known to be important predictors of silk production in the Japanese Silkworm (Bombyx Mori). Studying this phenomenon in primary neurons is critical to understanding the regulation of silk production. To study these changes we used cyclical stimulations using micro-electrodes to the Silkworm axon initiation segment of primary neurons. Numerical simulation results indicate that Silkworm axon initiation segment water potential fluctuated sinusoidally on high voltage only. Fluctuations in the amplitude and trend were caused by calcium flow and storage resistance, respectively. The change in Silkworm axon initiation segment-stored water was proportional to the change rate in water potential. Silkworm axon initiation segment diameter increased with fluctuations in calcium free media; moreover, it varied slightly under low voltage conditions. Our results indicate that the changes in Silkworm axon initiation segment diameter were caused by changes in water potential, which can be attributed to subcellular gated calcium channels within the primary neurons.

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Effect of temperature and storage on açaí (Euterpe oleracea) fruit water uptake: simulation of fruit transportation and pre-processing

Fruits ◽

10.1051/fruits:2007025 ◽

2007 ◽

Vol 62 (5) ◽

pp. 295-302 ◽

Cited By ~ 5

Author(s):

José Dalton Cruz Pessoa ◽

Paula Vanessa da Silva e Silva

Keyword(s):

Water Uptake ◽

Effect Of Temperature ◽

Euterpe Oleracea ◽

And Storage ◽

Uptake Simulation

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Numerical Simulation of Moisture and Temperature in Stored Grains

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.866.414 ◽

2017 ◽

Vol 866 ◽

pp. 414-417

Author(s):

Nut Khuttiyamart ◽

Warisa Yomsatieankul

Keyword(s):

Numerical Simulation ◽

Mathematical Model ◽

Production Costs ◽

Moisture Loss ◽

Grain Production ◽

Moisture Migration ◽

Java Program ◽

Stored Grains ◽

Physical Changes ◽

And Storage

This project aims to study the factors causing moisture migration and moisture loss of grain in storage grain that subsequently affect production costs by compensating lost weight due to its moisture. From reviewing a related mathematical model, it is found that physical changes of grain in silo, both the temperature and moisture, are caused by its oxidation during storage and aeration. Therefore, suitable grain storage can reduce its weight loss. To control storing process, the numerical solution of the model, a system of partial differential equations, is obtained by finite difference method. Moreover, a Java program has developed based on overall processes of the model as an information for decision making in grain production and storage.

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