EFFECT OF MATERNAL ATHYREOSIS ON RAT EMBRYOS DURING THE LATE PHASE OF ORGANOGENESIS

1974 ◽  
Vol 75 (3) ◽  
pp. 523-530 ◽  
Author(s):  
E. Köhler ◽  
F. Wojnorowicz ◽  
W. Ehmke
Keyword(s):  
Thyroid Hormones ◽  
Growth Kinetics ◽  
Late Phase ◽  
Rna Polymerases ◽  
Stages Of Development ◽  
Rat Embryos ◽  
Early Stages ◽  
Iodine Test ◽  
Maternal Thyroid ◽  
Kinetics Of

ABSTRACT In order to elucidate the question whether maternal thyroid hormones are necessary for both growth and differentiation processes during the phase of organogenesis, rats were thyroidectomized on day 6 of gestation (under barbiturate anaesthesia) using a stereomicroscope. Two days after the operation a radio-iodine-test was performed which ensured that only athyroid animals were used for the experiments. The results of the studies on the growth kinetics of 11- to 14-day-old rat embryos as well as on the activity of the DNA-dependent RNA polymerases and the α-glycerophosphate oxidase in rat embryos of operated mother animals showed that thyroid hormones are not required for the early stages of development of rats.

Dynamics of Thyroid Hormones at Early Stages of Development of the Sturgeon Acipenser güldenstadti

2004 ◽  
Vol 40 (2) ◽  
pp. 176-181 ◽  
Author(s):  
N. E. Boiko ◽  
O. A. Vorob'eva ◽  
R. A. Grigor'yan ◽  
G. G. Kornienko
Keyword(s):  
Thyroid Hormones ◽  
Stages Of Development ◽  
Early Stages

Early Stages Of Reaction Between Amorphous Ni-Nb And Crystalline Au Films

1985 ◽  
Vol 54 ◽  
Author(s):  
E. A. Dobisz ◽  
H. G. Craighead ◽  
J. H. Perepezko ◽  
J. D. Wiley ◽  
B. L. Doyle ◽  
...  
Keyword(s):  
Thin Film ◽  
Cross Section ◽  
Ternary Compound ◽  
Growth Kinetics ◽  
Depth Resolution ◽  
Compound Layer ◽  
Rutherford Backscattering ◽  
Early Stages ◽  
Kinetics Of ◽  
High Depth

ABSTRACTThin film interactions between a-(Ni-Nb) and polycrystalline Au over-layers have been studied with high depth resolution (≤1.7nm) Rutherford backscattering (RBS) and TEM to obtain information on the early stages of reaction at the interface. The RBS spectra from Au indicated that the interdiffused samples consisted of two layers: an Au-Nb binary layer on the surface and a ternary Au-Ni-Nb compound layer beneath the binary layer. The growth kinetics of the ternary compound layer differed in samples which had been relaxed prior to Au deposition from the kinetics for unrelaxed samples. Furthermore, cross section TEM micrographs showed that relaxed and unrelaxed samples exhibit different microstructures after the early stages, of annealing. We interpret this result to indicate that the reaction stages in relaxed samples are not as advanced as those in the unrelaxed samples.

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

Growth Kinetics of Quantum Size ZnO Particles

1998 ◽  
Vol 536 ◽  
Author(s):  
E. M. Wong ◽  
J. E. Bonevich ◽  
P. C. Searson
Keyword(s):  
Growth Kinetics ◽  
Ostwald Ripening ◽  
Chemical Potential ◽  
Colloidal Suspensions ◽  
Green Emission ◽  
Blue Shift ◽  
Constant Current ◽  
Mass Model ◽  
Zno Particles ◽  
Kinetics Of

AbstractColloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. The particle aging kinetics were determined by monitoring the optical band edge absorption and using the effective mass model to approximate the particle size as a function of time. We show that the growth kinetics of the ZnO particles follow the Lifshitz, Slyozov, Wagner theory for Ostwald ripening. In this model, the higher curvature and hence chemical potential of smaller particles provides a driving force for dissolution. The larger particles continue to grow by diffusion limited transport of species dissolved in solution. Thin films were fabricated by constant current electrophoretic deposition (EPD) of the ZnO quantum particles from these colloidal suspensions. All the films exhibited a blue shift relative to the characteristic green emission associated with bulk ZnO. The optical characteristics of the particles in the colloidal suspensions were found to translate to the films.

Growth kinetics of boride layers formed on GGG 40.3 ductile iron

2016 ◽  
Vol 58 (5) ◽  
pp. 418-421
Author(s):  
Fatma Ünal ◽  
Ahmet Topuz
Keyword(s):  
Growth Kinetics ◽  
Ductile Iron ◽  
Kinetics Of

scholarly journals Study of deposition parameters and growth kinetics of ZnO deposited by aerosol assisted chemical vapor deposition

RSC Advances ◽  
2021 ◽  
Vol 11 (30) ◽  
pp. 18493-18499
Author(s):  
Sergio Sánchez-Martín ◽  
S. M. Olaizola ◽  
E. Castaño ◽  
E. Urionabarrenetxea ◽  
G. G. Mandayo ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Growth Kinetics ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Kinetics Analysis ◽  
Deposition Parameters ◽  
Kinetics Of

Impact of deposition parameters, microstructure and growth kinetics analysis of ZnO grown by Aerosol-assisted Chemical Vapor Deposition (AACVD).

scholarly journals Morphology, energetics and growth kinetics of diphenylalanine fibres

2021 ◽  
Author(s):  
Phillip Mark Rodger ◽  
Caroline Montgomery ◽  
Giovanni Costantini ◽  
Alison Rodger
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Growth Kinetics ◽  
Dynamics Simulations ◽  
Kinetics Of

The formation and stability of diphenylalanine fibres are studied by combining molecular dynamics simulations with microscopy and spectroscopy experiments, quantitatively detailing their morphology, energetics and growth kinetics.

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