Infrared spectra of the weak hydrogen, oxygen and nitrogen complexes with hydrochloric acid in solid neon

1989 ◽  
Vol 93 (10) ◽  
pp. 3979-3983 ◽  
Author(s):  
Robert B. Bohn ◽  
Rodney D. Hunt ◽  
Lester Andrews
Keyword(s):  
Hydrochloric Acid ◽  
Infrared Spectra

Vibration-spectral studies of compounds formed by the combination of methylformamide and dimethylformamide with some strong acids

1966 ◽  
Vol 19 (11) ◽  
pp. 2091 ◽  
Author(s):  
E Spinner
Keyword(s):  
Hydrochloric Acid ◽  
Sulphuric Acid ◽  
Infrared Spectra ◽  
Spectral Studies ◽  
Ionic Form ◽  
Reaction Products ◽  
Unknown Structure ◽  
Acid Reaction ◽  
Strong Acids

A determination of the infrared spectra of the solid hydrochlorides of methylformamide and dimethylformamide and of the Raman spectra of their aqueous solutions showed that certain spectral features change with the medium used. The infrared spectra of the two amides in concentrated and in aqueous sulphuric acid, and in concentrated hydrochloric acid (HCl and DCl), are consistent with the existence of two amide/acid reaction products for each amide: one (certainly ionic) form predominates in sulphuric acid solutions; a second form, of unknown structure, is present in the solid hydrochlorides, and in hydrochloric acid the two forms coexist in equilibrium.

Structure of water-hydrochloric acid complexes in argon and nitrogen matrices from infrared spectra

1977 ◽  
Vol 81 (22) ◽  
pp. 2095-2102 ◽  
Author(s):  
A. Schriver ◽  
B. Silvi ◽  
D. Maillard ◽  
J. P. Perchard
Keyword(s):  
Hydrochloric Acid ◽  
Infrared Spectra ◽  
Structure Of Water

Collaborative Study of a Method for the Determination of Antipyrine and Benzocaine in Glycerol and Propylene Glycol Bases

1968 ◽  
Vol 51 (3) ◽  
pp. 624-626
Author(s):  
Richard T Krause
Keyword(s):  
Hydrochloric Acid ◽  
Propylene Glycol ◽  
Ferric Chloride ◽  
Infrared Spectra ◽  
Collaborative Study ◽  
Potassium Bromide ◽  
Reference Standards ◽  
Partition Chromatography ◽  
Average Recovery

Abstract A method for antipyrine and benzocaine, This Journal 50, 685-688 (1967), was studied by ten collaborators on five simulated commercial preparations at levels of 49—54 mg antipyrine/ml and 10—51 mg benzocaine/ml. The antipyrine and benzocaine are separated by column partition chromatography: antipyrine is retained on a ferric chloride column, and benzocaine is retained on a hydrochloric acid column. Maximum absorbances are determined on chloroform eluates at 272 and 283 mμ for antipyrine and benzocaine, respectively. Infrared spectra of the residues are determined in potassium bromide for identification of the drugs. The average recovery for antipyrine was 99.3 ± 1.80%, and for benzocaine, 99.0 ± 1 . 6 0 % . Infrared spectra submitted by collaborators corresponded to the reference standards and showed no interfering peaks. The method, with a slight change in the preparation of the standard solutions, is recommended for adoption as official, first action.

Fine Structure of Platelet Interaction with a New Microcrystalline Collagen Preparation

1974 ◽  
Vol 32 ◽  
pp. 58-59
Author(s):  
W. H. Zucker ◽  
R. G. Mason
Keyword(s):  
Fine Structure ◽  
Platelet Aggregation ◽  
Hydrochloric Acid ◽  
Whole Blood ◽  
Platelet Adhesion ◽  
Hemostatic Agent ◽  
Native Collagen ◽  
Fibrillar Morphology ◽  
Clinical Interest ◽  
New Form

Platelet adhesion initiates platelet aggregation and is an important component of the hemostatic process. Since the development of a new form of collagen as a topical hemostatic agent is of both basic and clinical interest, an ultrastructural and hematologic study of the interaction of platelets with the microcrystalline collagen preparation was undertaken.In this study, whole blood anticoagulated with EDTA was used in order to inhibit aggregation and permit study of platelet adhesion to collagen as an isolated event. The microcrystalline collagen was prepared from bovine dermal corium; milling was with sharp blades. The preparation consists of partial hydrochloric acid amine collagen salts and retains much of the fibrillar morphology of native collagen.

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