Zobrazeno 1 - 10
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pro vyhledávání: '"John L. Stephenson"'
Autor:
John L. Stephenson
Publikováno v:
Annals of the New York Academy of Sciences. 85:535-540
Autor:
John L. Stephenson, Yuanhua Tang
Publikováno v:
The Journal of General Physiology
Calcium (Ca) dynamics are incorporated into a mathematical model of the principal cell in the cortical collecting tubule developed earlier in Strieter et al. (1992a. Am. J Physiol. 263:F1063-1075). The Ca components are modeled after the Othmer-Tang
Publikováno v:
Applied Mathematics Letters. 8(4):79-82
Two algorithms are described for solving systems of differential and algebraic equations arising in mathematical models of solute and water flow along a tube with permeable walls. Some computational results comparing the two algorithms are presented.
Autor:
J. Frank Jen, John L. Stephenson
Publikováno v:
Bulletin of Mathematical Biology. 56:491-514
Substitution of measured permeabilities into mathematical models of the concentrating mechanism of the renal inner medulla yields less than the known urine osmolalities. To gain a better understanding of the mechanism we analyse a model in which a fo
Publikováno v:
Applied Mathematics Letters. 6(2):61-65
A multinephron model of the inner medullary urinary concentrating mechanism in the mammalian kidney is described. A procedure to represent the distribution of nephrons with a finite number of different nephron types is introduced. The model is compar
Publikováno v:
American Journal of Physiology-Renal Physiology. 263:F1063-F1075
The epithelium of the cortical collecting tubule of the rabbit is represented as four well-stirred compliant compartments corresponding to principal cell, alpha- and beta-intercalated cells, and lateral interspace. Model variables include the concent
Autor:
John L. Stephenson
Publikováno v:
Comprehensive Physiology
The sections in this article are: 1 Whole-Body Water and Solute Balance 1.1 Osmolal Clearance 1.2 Effect on Plasma Osmolality of Urine Flow of a Given Osmolality 1.3 Hypertonic Urine Implies a Hypotonic Tubular Reabsorbate and Vice Versa 1.4 Free Wat
Publikováno v:
Applied Mathematics Letters. 4:69-72
Model connectivity is utilized to develop efficient methods to solve large systems of non-linear algebraic equations arising in the numerical solutions of multipoint boundary value differential equations describing the kidney concentrating mechanism.
Publikováno v:
The Journal of General Physiology
Cell volume regulation during anisotonic challenge is investigated in a mathematical model of a tight epithelium. The epithelium is represented as compliant cellular and paracellular compartments bounded by mucosal and serosal bathing media. Model va
Publikováno v:
Biophysical journal. 70(1)
We study the models for calcium (Ca) dynamics developed in earlier studies, in each of which the key component is the kinetics of intracellular inositol-1,4,5-trisphosphate-sensitive Ca channels. After rapidly equilibrating steps are eliminated, the