A constant temperature perfusion system for myocardial energetics

The Fock test is widely used for assessing the reactivity of dissolving pulp. The objective of this study was to modify the method to improve the repeatability of the test. Various parameters that affect the repeatability of the Fock test were investigated. The results showed that Fock reactivity is dependent on testing conditions affecting the xanthation between cellulose and carbon disulfide, such as the moisture content of the pulp sample, sodium hydroxide (NaOH) concentration, xanthation temperature, carbon disulfide dosage, and xanthation time. The repeatability of the test was significantly improved using the following modified testing procedure: air dried sample in the constant temperature/humidity room, xanthation temperature of 66°F (19°C) in a water bath, xanthation time of 3 h, NaOH concentration of 9% (w/w), and 1.3 mL carbon disulfide.

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PERFUSION OF OVARIES IN VITRO AND IN VIVO

Acta Endocrinologica ◽

10.1530/acta.0.069s285 ◽

1972 ◽

Vol 68 (2_Supplb) ◽

pp. S285-S309 ◽

Cited By ~ 5

Author(s):

Kurt Ahrén ◽

Per Olof Janson ◽

Gunnar Selstam

Keyword(s):

Perfusion System ◽

Perfusion Technique ◽

Preliminary Results ◽

Advantages And Disadvantages

ABSTRACT This paper discusses in vivo and in vitro ovarian perfusion systems described so far in the literature. The interest is not focussed primarily on the results of these studies but rather on the advantages and disadvantages of the techniques and methods used. Another part of the paper summarizes the points which are most important, in our opinion, to take into consideration when developing an in vitro perfusion technique of the ovary. The last part of the paper gives a description of and some preliminary results from an in vitro perfusion system of the rabbit ovary which is under development in this laboratory.

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ACTION OF ENZYME DIGESTED PITUITARY GLANDS OF THE SKIPPER-FROG ON THE OVULATION OF THE SAME

Acta Endocrinologica ◽

10.1530/acta.0.xxxiii0255 ◽

1960 ◽

Vol XXXIII (II) ◽

pp. 255-260 ◽

Cited By ~ 3

Author(s):

L. S. Ramaswami ◽

A. B. Lakshman

Keyword(s):

Pituitary Gland ◽

Constant Temperature ◽

Constant Temperature Bath ◽

Predominant Role ◽

Lower Vertebrates ◽

Pituitary Glands ◽

Stimulating Factor

ABSTRACT By using enzymes, the gonadotrophic factors in the skipper-frog pituitary glands have been selectively inactivated or destroyed. By incubating a known number of pituitary gland homogenate with ptyalin in a constant temperature bath for 5–6 h the follicle-stimulating factor is inactivated; with trypsin or pepsin, the luteinizing factor is inactivated. Bioassay on gravid skipper-frogs indicate that the ptyalin digested homogenate brings about profuse spawning while the trypsin or pepsin digested homogenates do not. When a combination of ptyalin digested and trypsin digested homogenates is injected into fresh gravid skipper-frogs, poor spawning is brought about. These experiments show that the luteinizing factor alone brings about more profuse spawning than when it is combined with the follicle-stimulating factor. It is likely, therefore, that in the lower vertebrates the luteinizing factor of the pituitary gland plays a more predominant role. The exact proportions in which the different dosages for the control and test animals are administered are also tabulated.

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Simulation of Melting of Ice under a Constant Temperature Heat Source Using a Combined Transfinite Interpolation and Partial Differential Equation Methods

Journal of Porous Media ◽

10.1615/jpormedia.v10.i7.20 ◽

2007 ◽

Vol 10 (7) ◽

pp. 657-676 ◽

Cited By ~ 1

Author(s):

P. Rattanadecho ◽

C. Serttikul

Keyword(s):

Differential Equation ◽

Partial Differential Equation ◽

Heat Source ◽

Constant Temperature ◽

Partial Differential ◽

Transfinite Interpolation ◽

Temperature Heat

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A Constant‐Temperature Setting Device for Cam‐Actuated Temperature Programmers

Agronomy Journal ◽

10.2134/agronj1970.00021962006200010036x ◽

1970 ◽

Vol 62 (1) ◽

pp. 113-115

Author(s):

Donald W. George

Keyword(s):

Constant Temperature

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Control of the adiabatic flow reactor by feeding the catalyst solution

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19792352 ◽

1979 ◽

Vol 44 (8) ◽

pp. 2352-2365

Author(s):

Josef Horák ◽

Zina Sojková ◽

František Jiráček

Keyword(s):

Steady State ◽

Constant Temperature ◽

Reaction Temperature ◽

Control Algorithm ◽

Flow Reactor ◽

Operating Temperature ◽

Temperature Deviation ◽

Adiabatic Flow ◽

Dosing Frequency ◽

Laboratory Reactor

Control algorithm of the operating temperature is described in the reactor, which is operated at constant temperature and composition of the inlet mixture. The temperature is controlled by dosing a constant volume of the catalyst solution. The dosing frequency is determined according to the reaction temperature (deviation of the temperature from the desired value and the sign of the derivative of temperature). The control algorithm has been verified experimentally for the laboratory reactor in unstable steady state.

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