scholarly journals Mathematical Modeling and Experimental Validation of the Spatial Distribution of Boron in the Root of Arabidopsis thaliana Identify High Boron Accumulation in the Tip and Predict a Distinct Root Tip Uptake Function

2015 ◽  
Vol 56 (4) ◽  
pp. 620-630 ◽  
Author(s):  
Akie Shimotohno ◽  
Naoyuki Sotta ◽  
Takafumi Sato ◽  
Micol De Ruvo ◽  
Athanasius F.M. Marée ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Arabidopsis Thaliana ◽  
Spatial Distribution ◽  
Experimental Validation ◽  
Root Tip ◽  
Distinct Root ◽  
High Boron

Centrifugal Reactive-Molecular Distillation from High-Boiling-Point Petroleum Fractions. 1. Mathematical Modeling, Screening Variables, and Experimental Validation

2013 ◽  
Vol 52 (23) ◽  
pp. 7956-7974 ◽  
Author(s):  
Laura P. Tovar ◽  
Maria R. Wolf-Maciel ◽  
Alessandra Winter ◽  
Rubens Maciel-Filho ◽  
César B. Batistella ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Boiling Point ◽  
Molecular Distillation ◽  
Experimental Validation ◽  
Petroleum Fractions ◽  
High Boiling Point

Mathematical modeling of a novel tubular micro-solid oxide fuel cell and experimental validation

2010 ◽  
Vol 65 (22) ◽  
pp. 6001-6013 ◽  
Author(s):  
Saeid Amiri ◽  
R.E. Hayes ◽  
K. Nandakumar ◽  
Partha Sarkar
Keyword(s):  
Mathematical Modeling ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Experimental Validation ◽  
Solid Oxide ◽  
Oxide Fuel

Mathematical modeling of cement paste microstructure by mosaic pattern. Part II. Application

1997 ◽  
Vol 12 (7) ◽  
pp. 1741-1746 ◽  
Author(s):  
Paul D. Tennis ◽  
Yunping Xi ◽  
Hamlin M. Jennings
Keyword(s):  
Mathematical Modeling ◽  
Spatial Distribution ◽  
Portland Cement ◽  
Cement Paste ◽  
Pattern Analysis ◽  
Mosaic Pattern ◽  
Cement Pastes ◽  
Multiphase Materials ◽  
Spatial Features ◽  
Complex Shapes

A model based on mosaic pattern analysis is shown to have the potential to describe the complex shapes and spatial distribution of phases in the microstructures of multiphase materials. Several characteristics of both micrographs of portland cement pastes and images generated using the few parameters of the model are determined and, for the most part, agreement is good. The advantage is that spatial features of the microstructures can be captured by a few parameters.

scholarly journals Redox-Responsive Transcription Factor 1 (RRFT1) Is Involved in Extracellular ATP-Regulated Arabidopsis thaliana Seedling Growth

2020 ◽  
Vol 61 (4) ◽  
pp. 685-698 ◽  
Author(s):  
Ruojia Zhu ◽  
Xiaoxia Dong ◽  
Yingying Xue ◽  
Jiawei Xu ◽  
Aiqi Zhang ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Adenosine Triphosphate ◽  
Seedling Growth ◽  
Growth And Development ◽  
High Throughput Sequencing ◽  
Root Tip ◽  
Loss Of Function ◽  
Redox Responsive ◽  
Transcription Factor 1

Abstract Extracellular adenosine triphosphate (eATP) is an apoplastic signaling molecule that plays an essential role in the growth and development of plants. Arabidopsis seedlings have been reported to respond to eATP; however, the downstream signaling components are still not well understood. In this study, we report that an ethylene-responsive factor, Redox-Responsive Transcription Factor 1 (RRTF1), is involved in eATP-regulated Arabidopsis thaliana seedling growth. Exogenous adenosine triphosphate inhibited green seedling root growth and induced hypocotyl bending of etiolated seedlings. RRTF1 loss-of-function mutant (rrtf1) seedlings showed decreased responses to eATP, while its complementation or overexpression led to recovered or increased eATP responsiveness. RRTF1 was expressed rapidly after eATP stimulation and then migrated into the nuclei of root tip cells. eATP-induced auxin accumulation in root tip or hypocotyl cells was impaired in rrtf1. Chromatin immunoprecipitation and high-throughput sequencing results indicated that eATP induced some genes related to cell growth and development in wild type but not in rrtf1 cells. These results suggest that RRTF1 may be involved in eATP signaling by regulating functional gene expression and cell metabolism in Arabidopsis seedlings.

scholarly journals Mathematical modeling of the beam spatial distribution for the laser with ceramic active elements

2019 ◽  
Vol 1348 ◽  
pp. 012105
Author(s):  
E A Sharandin ◽  
V L Kauts ◽  
T M Gladysheva ◽  
A V Kaiutienko ◽  
D I Portnov
Keyword(s):  
Mathematical Modeling ◽  
Spatial Distribution ◽  
Active Elements

scholarly journals Nitrate Induction of Primary Root Growth Requires Cytokinin Signaling in Arabidopsis thaliana

2019 ◽  
Vol 61 (2) ◽  
pp. 342-352 ◽  
Author(s):  
Pamela A Naulin ◽  
Grace I Armijo ◽  
Andrea S Vega ◽  
Karem P Tamayo ◽  
Diana E Gras ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Division ◽  
Root Growth ◽  
Primary Root ◽  
Growth Arrest ◽  
Root Tip ◽  
Wild Type ◽  
Cytokinin Signaling ◽  
Control Growth ◽  
Primary Root Growth

Abstract Nitrate can act as a potent signal to control growth and development in plants. In this study, we show that nitrate is able to stimulate primary root growth via increased meristem activity and cytokinin signaling. Cytokinin perception and biosynthesis mutants displayed shorter roots as compared with wild-type plants when grown with nitrate as the only nitrogen source. Histological analysis of the root tip revealed decreased cell division and elongation in the cytokinin receptor double mutant ahk2/ahk4 as compared with wild-type plants under a sufficient nitrate regime. Interestingly, a nitrate-dependent root growth arrest was observed between days 5 and 6 after sowing. Wild-type plants were able to recover from this growth arrest, while cytokinin signaling or biosynthesis mutants were not. Transcriptome analysis revealed significant changes in gene expression after, but not before, this transition in contrasting genotypes and nitrate regimes. We identified genes involved in both cell division and elongation as potentially important for primary root growth in response to nitrate. Our results provide evidence linking nitrate and cytokinin signaling for the control of primary root growth in Arabidopsis thaliana.

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