An experimental asthma model in unanesthetized rat, and the difference in effect of disodium cromoglycate between passive cutaneous anaphylaxis model and asthma model in rat.

1982 ◽  
Vol 5 (10) ◽  
pp. 751-759 ◽  
Author(s):  
KIYOSHI KURIYAMA ◽  
KIYONOSHIN ICHIKAWA
Keyword(s):  
Passive Cutaneous Anaphylaxis ◽  
Disodium Cromoglycate ◽  
Asthma Model ◽  
The Difference

The effect of predosage with disodium cromoglycate (DSCG) on the dose-related inhibition of rat passive cutaneous anaphylaxis by DSCG

Life Sciences ◽  
1975 ◽  
Vol 17 (5) ◽  
pp. 793-802 ◽  
Author(s):  
Patricia A. Riley ◽  
Philip Sheard ◽  
Alan J. Clarke ◽  
T.SamuelC. Orr
Keyword(s):  
Passive Cutaneous Anaphylaxis ◽  
Disodium Cromoglycate

The Pharmacology of Passive Cutaneous Anaphylaxis in the Calf

1972 ◽  
Vol 50 (3) ◽  
pp. 255-262 ◽  
Author(s):  
P. W. Wells ◽  
P. Eyre
Keyword(s):  
Latent Period ◽  
Horse Serum ◽  
Inhibitory Effect ◽  
Threshold Dose ◽  
Antigen Challenge ◽  
Passive Cutaneous Anaphylaxis ◽  
Disodium Cromoglycate ◽  
Diethylcarbamazine Citrate ◽  
Anaphylactic Response ◽  
Passive Cutaneous Anaphylaxis Reaction

The effects of mepyramine maleate, sodium meclofenamate, methysergide bimaleate, diethylcarbamazine citrate, and disodium cromoglycate on bovine cutaneous anaphylactic reactions and responses to intradermal injections of histamine, 5-hydroxytryptamine, and bradykinin were studied. Calves sensitized by immunization with horse serum in Freund's complete adjuvant were bled to obtain skin-sensitizing serum which was used in passive cutaneous anaphylaxis (P.C.A.) tests. A latent period of 72 h was allowed between intradermal injections of sera and antigen challenge. Mepyramine maleate (10 mg/kg) selectively inhibited responses to histamine and raised the threshold dose of antibody required to elicit a response. Disodium cromoglycate (DSCG, 10 mg/kg) given intravenously 30 min or immediately prior to challenge had no significant effect either on the responses to drugs or on the passive cutaneous anaphylaxis reaction. Diethylcarbamazine (DECC, 20 mg/kg) administered immediately prior to challenge significantly inhibited the cutaneous anaphylactic response and when DSCG was given simultaneously with DECC, this inhibitory effect was apparently augmented. Methysergide (1 mg/kg) and sodium meclofenamate (2 mg/kg) were ineffective in suppressing P.C.A. It is concluded that histamine and a slow-reacting substance (SRS-A) are involved in the mediation of bovine cutaneous anaphylaxis and that kinins may contribute, while 5-hydroxytryptamine would appear unimportant.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

Influence of Cell Wall Composition on the Fossilisation of Bacteria and the Implications for the Search for Early Life Forms

1997 ◽  
Vol 161 ◽  
pp. 491-504 ◽  
Author(s):  
Frances Westall
Keyword(s):  
Cell Wall ◽  
Life Forms ◽  
Cation Binding ◽  
Positive Bacterium ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Transmission Electron ◽  
Hydrothermal Sediments ◽  
Identification Of Bacteria ◽  
The Difference

AbstractThe oldest cell-like structures on Earth are preserved in silicified lagoonal, shallow sea or hydrothermal sediments, such as some Archean formations in Western Australia and South Africa. Previous studies concentrated on the search for organic fossils in Archean rocks. Observations of silicified bacteria (as silica minerals) are scarce for both the Precambrian and the Phanerozoic, but reports of mineral bacteria finds, in general, are increasing. The problems associated with the identification of authentic fossil bacteria and, if possible, closer identification of bacteria type can, in part, be overcome by experimental fossilisation studies. These have shown that not all bacteria fossilise in the same way and, indeed, some seem to be very resistent to fossilisation. This paper deals with a transmission electron microscope investigation of the silicification of four species of bacteria commonly found in the environment. The Gram positiveBacillus laterosporusand its spore produced a robust, durable crust upon silicification, whereas the Gram negativePseudomonas fluorescens, Ps. vesicularis, andPs. acidovoranspresented delicately preserved walls. The greater amount of peptidoglycan, containing abundant metal cation binding sites, in the cell wall of the Gram positive bacterium, probably accounts for the difference in the mode of fossilisation. The Gram positive bacteria are, therefore, probably most likely to be preserved in the terrestrial and extraterrestrial rock record.

Structuring, Motions and Shapes of Corona Emission Line Profiles

1994 ◽  
Vol 144 ◽  
pp. 421-426
Author(s):  
N. F. Tyagun
Keyword(s):  
Emission Line ◽  
Filling Factor ◽  
Direct Relationship ◽  
Coronal Plasma ◽  
Line Of Sight ◽  
Line Profiles ◽  
The Difference ◽  
Yellow Line ◽  
Red Line

AbstractThe interrelationship of half-widths and intensities for the red, green and yellow lines is considered. This is a direct relationship for the green and yellow line and an inverse one for the red line. The difference in the relationships of half-widths and intensities for different lines appears to be due to substantially dissimilar structuring and to a set of line-of-sight motions in ”hot“ and ”cold“ corona regions.When diagnosing the coronal plasma, one cannot neglect the filling factor - each line has such a factor of its own.

Difference Fourier Analysis of Glucose Embedded and Frozen Hydrated Purple Membrane

1982 ◽  
Vol 40 ◽  
pp. 74-75
Author(s):  
Jules S. Jaffe ◽  
Robert M. Glaeser
Keyword(s):  
Purple Membrane ◽  
Data Set ◽  
High Resolution Data ◽  
X Ray ◽  
X Ray Crystallography ◽  
Fourier Techniques ◽  
Versus Protein ◽  
The Difference ◽  
Difference Fourier ◽  
Ideal Method

Although difference Fourier techniques are standard in X-ray crystallography it has only been very recently that electron crystallographers have been able to take advantage of this method. We have combined a high resolution data set for frozen glucose embedded Purple Membrane (PM) with a data set collected from PM prepared in the frozen hydrated state in order to visualize any differences in structure due to the different methods of preparation. The increased contrast between protein-ice versus protein-glucose may prove to be an advantage of the frozen hydrated technique for visualizing those parts of bacteriorhodopsin that are embedded in glucose. In addition, surface groups of the protein may be disordered in glucose and ordered in the frozen state. The sensitivity of the difference Fourier technique to small changes in structure provides an ideal method for testing this hypothesis.

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