Nernst–Planck/Poisson model for the potential response of permselective gold nanopores

In frog ventricular strips bathed in Ca-free Ringer's solution containing 6–30 mm/liter Mg and treated with conditioning current pulses, propagation became impaired. An exaggerated foot, or prepotential, was consistently more prominent when the conditioned strip was stimulated from one end than from the other. Occasionally a prepotential in isolation alternated with a prepotential plus action potential response. After further treatment with current pulses, propagation failed in the direction of negative current flow. Thresholds of impaled cells were identical. Bidirectional propagation was restored in Ringer's solution. Conditioning pulses of reversed polarity induced unidirectional propagation in the reverse direction. Propagation in frog sartorius muscle was not blocked under similar conditions. Prepotentials and unidirectional propagation may be explained by junctional transmission from cell to cell.

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Analysis of factors causing the number of poor people in DKI Jakarta using spatial autoregressive Poisson model

10.1063/5.0041857 ◽

2021 ◽

Author(s):

Siti Rohmah Rohimah ◽

Qorry Meidianingsih ◽

Nabilah Ninda Nur Azizah ◽

Ahmad Syauqy Baihaqy

Keyword(s):

Poisson Model ◽

Poor People ◽

Spatial Autoregressive

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Effects of Ad-hoc Data Truncation and Homogeneous Preferences on Recreational Demand and Values: An Application to the George Washington and Jefferson National Forests

Journal of Agricultural and Applied Economics ◽

10.1017/aae.2020.30 ◽

2021 ◽

pp. 1-15

Author(s):

Kavita Sardana ◽

John C. Bergstrom ◽

J. M. Bowker

Keyword(s):

Latent Class ◽

Ad Hoc ◽

Cost Model ◽

Consumer Surplus ◽

Poisson Model ◽

Travel Cost ◽

National Forests ◽

Heterogeneous Preferences ◽

George Washington ◽

Travel Cost Model

Abstract We estimate a travel cost model for the George Washington & Jefferson National Forests using an On-Site Latent Class Poisson Model. We show that the constraints of ad-hoc truncation and homogenous preferences significantly impact consumer surplus estimates derived from the on-site travel cost model. By relaxing the constraints, we show that more than one class of visitors with unique preferences exists in the population. The resulting demand functions, price responsive behaviors, and consumer surplus estimates reflect differences across these classes of visitors. With heterogeneous preferences, a group of ‘local residents’ exists with a probability of 8% and, on average take 113 visits.

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Spatial and temporal dynamics of nitrogen exchange in an upwelling reach of a groundwater‐fed river and potential response to perturbations changing rainfall patterns under UK climate change scenarios

Hydrological Processes ◽

10.1002/hyp.14135 ◽

2021 ◽

Vol 35 (4) ◽

Author(s):

Ann Louise Heathwaite ◽

Catherine Heppell ◽

Andrew Binley ◽

Patrick Byrne ◽

Katrina Lansdown ◽

...

Keyword(s):

Climate Change ◽

Temporal Dynamics ◽

Climate Change Scenarios ◽

Potential Response ◽

Spatial And Temporal Dynamics ◽

Rainfall Patterns ◽

Nitrogen Exchange

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Zn(II)-selective poly (vinyl chloride) (PVC) membrane electrode based on Schiff base ligand 2-benzoylpyridine semicarbazone as an ionophore

Journal of Polymer Engineering ◽

10.1515/polyeng-2020-0053 ◽

2020 ◽

Vol 40 (10) ◽

pp. 842-847

Author(s):

Shankar Suman ◽

Ram Singh

Keyword(s):

Schiff Base ◽

Detection Limit ◽

Vinyl Chloride ◽

Pvc Membrane ◽

Membrane Electrode ◽

Sodium Tetraphenylborate ◽

Potential Response ◽

Selective Electrode ◽

Poly Vinyl Chloride ◽

Pvc Membrane Electrode

AbstractA new poly (vinyl chloride) (PVC) membrane electrode using 2-benzoylpyridine semicarbazone as membrane carrier with dioctylphthalate as plasticizer and sodium tetraphenylborate (NaTBP) as anion excluder has been fabricated and investigated as Zn(II)-selective electrode. Best potential response is observed for the composition PVC 30%, plasticizer 58%, NaTBP 8% and ionophore 4% (w/w). The sensor showed a linear stable response over a concentration range of 1.0 × 10−2–4.56 × 10−6 M with a detection limit of 2.28 × 10−6 M and a response time <10 s. The electrode can be used for at least six months without any divergence in potential.

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