- Mechanics of a Plant in Fluid Flow. [Journal Article]
- JEJ Exp Bot 2019 Jun 13
- Plants live in constantly moving fluid, whether air or water. In response to the loads associated with fluid motion, plants bend and twist, often with great amplitude. These large deformations are no…
Plants live in constantly moving fluid, whether air or water. In response to the loads associated with fluid motion, plants bend and twist, often with great amplitude. These large deformations are not found in traditional engineering application and thus necessitate new specialised scientific developments. Studying Fluid-Structure Interactions (FSI) in botany, forestry and agricultural science is crucial to the optimisation of biomass production for food, energy, and construction materials. FSI are also central in the study of the ecological adaptation of plants to their environment. This review paper surveys the mechanics of FSI on individual plants. We present a short refresher on fluid mechanics then dive in the statics and dynamics of plant-fluid interactions. For every phenomenon considered, we present the appropriate dimensionless numbers to characterise the problem, discuss the implications of these phenomena on biological processes, and propose future research avenues. We cover the concept of reconfiguration while considering poroelasticity, torsion, chirality, buoyancy, and skin friction. We also cover the dynamical phenomena of wave action, flutter, and vortex-induced vibrations.
- The Feasibility of Increasing Hospital Surge Capacity in Disasters through Early Patient Discharge. [Journal Article]
- BEBull Emerg Trauma 2019; 7(2):105-111
- CONCLUSIONS: A considerable percentage of in-patients are dischargeable during disasters. The Early Discharge Assessment Checklist, developed in this study, is an appropriate tool to provide reliable data about early dischargeability in disasters.
- Interstitial clustering in metallic systems as a source for the formation of the icosahedral matrix and defects in the glassy state. [Journal Article]
- JPJ Phys Condens Matter 2019 Jun 13
- The paper presents molecular dynamics and -statics simulations of a prototypical mono-atomic metallic system (aluminum) and its defects in the crystalline and glassy states. It is shown that there is…
The paper presents molecular dynamics and -statics simulations of a prototypical mono-atomic metallic system (aluminum) and its defects in the crystalline and glassy states. It is shown that there is a thermodynamic driving force for the association of dumbbell interstitials in the crystalline lattice into clusters consisting of different amounts of defects. Clusters containing seven interstitials constitute perfect icosahedra. Within the general framework of the Interstitialcy theory, melting of simple metallic crystals is intrinsically related to a rapid increase of the concentration of dumbbell interstitials, which remain identifiable structural units in the liquid state. Then, the glass produced by rapid melt quenching contains interstitial-type defects. The idea of the present work is to argue that the major structural feature of many metallic glasses -- icosahedral ordering -- originates from the clustering of interstitial-type defects frozen-in upon melt quenching. Separate defects and their small clusters represent the defect part of the glassy structure.
- Depression is a major risk factor for the development of dementia in people with lower urinary tract symptoms: A nationwide population-based study. [Journal Article]
- PlosPLoS One 2019; 14(6):e0217984
- CONCLUSIONS: Depression is a major risk factor for the onset of subsequent dementia in patients with LUTS. Early screening and interventions for depression in patients with LUTS may be important to maintain cognitive function.
- Late initiation of antenatal care and associated factors among pregnant women in Addis Zemen primary hospital, South Gondar, Ethiopia. [Journal Article]
- RHReprod Health 2019 May 31; 16(1):73
- CONCLUSIONS: The prevalence of late ANC initiation remains a major public health issue in Ethiopia. The major factors for being late were found to be poor knowledge, being housewife, and self-employment, travel expenses and unintended pregnancy. District and zonal health offices should work to create awareness about the importance of early initiation of ANC, make the service closer to the community and increase contraceptive utilization.
- Conservative Care, Dialysis Withdrawal, and Palliative Care: Results from a Survey of a Non-Profit Dialysis Provider in Germany. [Journal Article]
- KBKidney Blood Press Res 2019; 44(2):158-169
- CONCLUSIONS: Compared to international numbers, in Germany, proportion of CRC and DW reported by non-profit renal centers is in the lower range. Center practice of palliative care management varies and is driven by availability of local palliative care resources and presumably by attitudes of the renal teams. Quality of palliative care and the decision-making process need further evaluation.
- Interface Characterization Between Polyethylene/ Silica in Engineered Cementitious Composites by Molecular Dynamics Simulation. [Journal Article]
- MMolecules 2019 Apr 16; 24(8)
- Polyethylene is widely adopted in engineered cementitious composites to control the crack width. A clearer knowledge of the PE/concrete interfacial properties is important in developing engineered ce…
Polyethylene is widely adopted in engineered cementitious composites to control the crack width. A clearer knowledge of the PE/concrete interfacial properties is important in developing engineered cementitious composites, which can lead to a limited crack width. Tensile failure and adhesion properties of the amorphous polyethylene/silica (PE/S) interface are investigated by molecular dynamics to interpret the PE/concrete interface. The influence of the PE chain length, the PE chain number and coupling agents applied on silica surface on the interfacial adhesion is studied. An increase of the adhesion strength of the modified silica surface by coupling agents compared with the unmodified silica is found. The failure process, density profile and potential energy evolutions of the PE/S interface are studied. The thermodynamic work of adhesion that quantifies the interfacial adhesion of the PE/S interface is evaluated. The present study helps to understand the interfacial adhesion behavior between ECC and PE, and is expected to contribute to restricting the crack width.
- A co-infection with malaria and visceral leishmaniasis in Eastern state of India. [Case Reports]
- PMPresse Med 2019; 48(3 Pt 1):328-331
- Synthesis and characterization of metal loaded chitosan-alginate biopolymeric hybrid beads for the efficient removal of phosphate and nitrate ions from aqueous solution. [Journal Article]
- IJInt J Biol Macromol 2019 Jun 01; 130:407-418
- The aim of this present scenario is to examine the removal performance and mechanism of phosphate and nitrate removal onto metal (Fe3+) loaded chitosan and alginate biopolymeric hybrid beads (Fe-CS-A…
The aim of this present scenario is to examine the removal performance and mechanism of phosphate and nitrate removal onto metal (Fe3+) loaded chitosan and alginate biopolymeric hybrid beads (Fe-CS-Alg) from aqueous solution. The batch adsorption experiments were accomplished via various operating parameters like pH, dosage, contact time, co-existing anions, and temperature. The equilibrium isotherm study was scrutinized by three different isotherm models like Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. The thermodynamic statics specifies that the spontaneous and endothermic nature of phosphate and nitrate adsorption. The proposed mechanism indicated that the removal of phosphate and nitrate ions was mainly governed by electrostatic interaction, complexation and ion exchange mechanism. Consequently, the adsorption mechanism was examined by studying the physicochemical characteristics of the beads and sorbate adsorbed beads using the FTIR, XRD, SEM and EDAX with mapping analysis and TGA analytical techniques. The performance of the Fe-CS-Alg beads in field condition was assessed with contaminated water sample taken from nearby an industrial area. Thus, the experimental outcomes clearly indicated that the developed biopolymeric hybrid beads could be utilized as the potential adsorbents for the removal of phosphate and nitrate ions from aqueous solution.
New Search Next
- New endoscopic ultrasonography criteria for malignant lymphadenopathy based on inter-rater agreement. [Journal Article]
- PlosPLoS One 2019; 14(2):e0212427
- CONCLUSIONS: EUS diagnostic criteria for lymphadenopathy based on inter-rater agreement were more accurate than old criteria. This result will be useful for the diagnosis of lymphadenopathy.