Results 251 to 260 of about 1,458,680 (306)

Fluorescence studies of the photosynthetic induction period

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects, 1964
Abstract The fluorescence intensity of green leaves at the beginning of an irradiation period is lower than at the subsequent steady state of illumination. This is interpreted in terms of the adsorption in the dark of plant metabolites at an active chlorophyll surface and of their photochemical reduction in the first few seconds of strong irradiation.
J L, ROSENBERG, T, BIGAT, S, DEJAEGERE
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Induction Periods in Reactions of N-Halogenimides

Nature, 1951
N-HALOGENIMIDES have been extensively used in preparative organic chemistry during the past few years1. We have attempted to elucidate the mechanism of the reaction of N-chlorosuccinimide on toluene, in which the simplicity of the reagents and products appeared to be particularly suitable for such a study.
P, GOLDFINGER, P A, GOSSELAIN, R H, MARTIN   +2 more
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Video luminescent barometry - The induction period

31st Aerospace Sciences Meeting, 1993
Video monitoring of oxygen quenching of the photoluminescence of platinum octaethylporphyrin (PtOEP) in silicone polymer resin may be used to measure pressure distribution over an airfoil. A continuous increase of the luminescence intensity of PtOEP on exposure to the exciting light is known as the induction effect.
RORY UIBEL, GAMAL KHALIL, MARTIN GOUTERMAN, JEAN GALLERY, JAMES CALLIS   +4 more
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The Induction Period in Physical Development

The Journal of Photographic Science, 1976
AbstractThe early stages of pure physical development were studied under conditions of constant pAg and in the presence of additives known to influence the "induction period” in chemical development. It appears that the rate of pure physical development is markedly dependent on the nucleus charge and on the charge on the developing agent, at least for ...
G.I.P. Levenson, P.J.P. Twist
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Surface Microfouling During the Induction Period

Journal of Heat Transfer, 1983
The time during which newly installed or cleaned heat transfer surfaces remain free of fouling deposits thick enough to diminish heat transfer coefficients or energy efficiency is often called the “induction period,” a term disguising lack of knowledge of the microfouling events actually occurring.
R. E. Baier, A. E. Meyer, V. A. DePalma, R. W. King, M. S. Fornalik   +4 more
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The Induction Period in Development

The Journal of Photographic Science, 1975
AbstractSince Ihe exposure-dependent induction periods controlling the developmenl of individual grains in an emulsion and induction periods derived from the overall kinetics of development depend upon different experimental faclors and arc not necessarily connected, they should be called different names.
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Theory of long induction periods

Journal of Crystal Growth, 1987
Abstract Current theories relating induction periods in crystallization to either stationary nucleation rate or relaxation time of embryo distribution are of limited validity. The Zeldovich-Frenkel theory overestimates the growth rate of postcritical embryos with high surface energy.
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DSC Study of Oxidation Induction Periods

Journal of Thermal Analysis and Calorimetry, 2001
A theory of the evaluation of kinetic parameters of induction periods for non-isothermal processes is outlined and a method to obtain the parameters from non-isothermal differential scanning calorimetry measurements, based on the dependence of onset temperature of oxidation peak on heating rate, is presented.
P. Šimon, Ľ. Kolman
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Measuring induction period for calcium sulfate dihydrate precipitation

AIChE Journal, 1999
AbstractHomogeneous nucleation of CaSO4·2H2O (gypsum) based on an optical diagnostic technique was studied within a supersaturation range of 1–4 at 25–90°C. The experiments were carried out using an experimental apparatus consisting of a batch crystallizer with the related measurement devices. Signals of scattered and transmitted light coming from a He–
Lancia A., MUSMARRA, Dino, Prisciandaro M.   +2 more
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Latent period in the induction of reticuloendothelial blockade

American Journal of Physiology-Legacy Content, 1960
Double intravenous injections of colloidal carbon in the mouse, with variation of the time between doses and with blood disappearance curves taken after the second dose, revealed a delay of over 3 hours in onset of reticuloendothelial blockade due to the first carbon dose.
H G, PARKER, C R, FINNEY
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