Enhanced Longitudinal Mixing in a Lake Caused by Inflow-Induced Circulation

1985 ◽  
Vol 21 (2) ◽  
pp. 221-228
Author(s):  
Francis J. Ferrandino ◽  
Donald E. Aylor
Keyword(s):  
Longitudinal Mixing

Longitudinal mixing in packed beds

1960 ◽  
Vol 12 (1) ◽  
pp. 20-34 ◽  
Author(s):  
E.J. Cairns ◽  
J.M. Prausnitz
Keyword(s):  
Packed Beds ◽  
Longitudinal Mixing

Discussion of “Longitudinal Mixing in Natural Streams”

1968 ◽  
Vol 94 (3) ◽  
pp. 566-571
Author(s):  
Hugo B. Fischer ◽  
Nobuhiro Yotsukura
Keyword(s):  
Natural Streams ◽  
Longitudinal Mixing

scholarly journals Bomb-Produced 14C in Tree Rings

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 753-756 ◽  
Author(s):  
Dai Kaimei ◽  
Qian Youneng ◽  
C. Y. Fan
Keyword(s):  
Tree Ring ◽  
Tree Rings ◽  
Liquid Scintillation ◽  
Equilibrium Distribution ◽  
Latitude Zone ◽  
Novaya Zemlya ◽  
Longitudinal Mixing ◽  
Oak Tree ◽  
Global Equilibrium ◽  
Northern And Southern Hemispheres

The 14C content in 1961–1967 and 1970–1983 tree rings of a spruce grown in Dailing, China (47°N, 129°E) was measured by liquid scintillation. As a result of USSR bomb tests at Novaya Zemlya (72°N, 53°E), Δ14C values rose dramatically from 250‰ in 1961 to a maximum 909‰ in 1964, and then gradually decreased to 238‰ in 1983. We compared Δ14C values in the rings of an oak tree grown at 43°N, 74°W and that of a pine grown at 49°N, 9°E, and atmospheric Δ14C values in both northern and southern hemispheres. We observe that: 1) annual tree rings grown in the same latitude zone have the same Δ14C values, reflecting rapid longitudinal mixing of the atmosphere; 2) atmospheric 14C concentrations reached a global equilibrium distribution at the end of 1968, and tree ring 14C content reflects atmospheric 14C concentration; 3) 1976–1982 rings of the Dailing spruce show excessive 14C, likely due to the effect of 1976 and 1980 Chinese bomb tests; 4) Δ14C decreases exponentially, halving every 17 yr.

Localization of rapidly exchangeable calcium in mammalian heart muscle

1975 ◽  
Vol 228 (2) ◽  
pp. 345-351 ◽  
Author(s):  
RC Kolbeck ◽  
NF Paradise ◽  
MB Visscher
Keyword(s):  
Interstitial Water ◽  
Ventricular Muscle ◽  
New Methods ◽  
Vascular Bed ◽  
Transit Times ◽  
Rabbit Myocardium ◽  
Longitudinal Mixing ◽  
Isotope Technique ◽  
Mammalian Heart Muscle ◽  
Double Isotope

Two new methods were used to calculate net labeled Ca++ compartmental influx into rabbit myocardium: 1) continuous measurements of arteriovenous differences in 45Ca levels are corrected for longitudinal mixing and for varying transit times by a double-isotope technique with the relatively impermeant 131I-labeled albumin as the referent substance; 21 tritiated sucrose and 45Ca contents were measured in ventricular muscle after perfusion with the doubly labeled perfusate and washout of aqueous perfusate with fluorocarbon 80. Both methods yielded similar results. Only 52% of the Ca++ efflux from the vascular bed during the rapid flux period can be accounted for as Ca++ in interstitial water under control perfusion conditions. Contracture induced by substituting K+ for Na+ in the perfusate brings the fraction not accounted for as Ca++ in interstitial water from 48 to 60% of the total in 5 min. When irreversible contracture is induced by return to normal [Ca++] after short periods of excitation-contraction uncoupling due to zero [Ca++] perfusion, the fraction not accounted for as Ca++ in interstitial water is 68% in 5 min.

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