A new method for rapid degree of substitution and purity determination of chloroform-soluble cellulose esters, using 31P NMR

2010 ◽  
Vol 2 (10) ◽  
pp. 1499 ◽  
Author(s):  
Alistair W. T. King ◽  
Jarno Jalomäki ◽  
Mari Granström ◽  
Dimitris S. Argyropoulos ◽  
Sami Heikkinen ◽  
...  
Keyword(s):  
31P Nmr ◽  
Degree Of Substitution ◽  
New Method ◽  
Cellulose Esters ◽  
Purity Determination

An Efficient Method for Determination of the Degree of Substitution of Cellulose Esters of Long Chain Aliphatic Acids

Cellulose ◽  
2005 ◽  
Vol 12 (5) ◽  
pp. 449-458 ◽  
Author(s):  
C.S.R. Freire ◽  
A.J.D. Silvestre ◽  
C. Pascoal Neto ◽  
R.M.A. Rocha
Keyword(s):  
Efficient Method ◽  
Degree Of Substitution ◽  
Cellulose Esters ◽  
Aliphatic Acids ◽  
Long Chain

31P NMR enantiomeric purity determination of free 1-aminoalkylphosphonic acids via their diastereoisomeric Pd(II) complexes

1989 ◽  
Vol 27 (10) ◽  
pp. 922-924 ◽  
Author(s):  
Zdzisław Głowacki ◽  
Marek Topolski ◽  
Ewa Matczak-Jon ◽  
Maria Hoffmann
Keyword(s):  
31P Nmr ◽  
Enantiomeric Purity ◽  
Purity Determination

scholarly journals Accurate determination of the degree of substitution of long chain cellulose esters

Cellulose ◽  
2008 ◽  
Vol 16 (2) ◽  
pp. 289-297 ◽  
Author(s):  
J. Peydecastaing ◽  
C. Vaca-Garcia ◽  
E. Borredon
Keyword(s):  
Accurate Determination ◽  
Degree Of Substitution ◽  
Cellulose Esters ◽  
Long Chain

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method

A New Method for the Determination of Plasma Activators of Fibrinolysis

1977 ◽  
Vol 37 (02) ◽  
pp. 210-215 ◽  
Author(s):  
R Margalit ◽  
E Gidron ◽  
Y Shalitin
Keyword(s):  
New Method ◽  
Effective Activator

SummaryThe term “effective activator” of plasminogen is proposed, to denote the resultant of activator-antiactivator interaction, and a method for the determination of the level of these activators is described. By adding axcess plasminogen to the euglobulin fraction of plasma the influence of the level of endogenous plasminogen and of the antiplasmin is eliminated. It is shown that the level of fibrinogen has very little bearing on the results. An effective activator unit is defined as equal to 1 CTA unit of urokinase activity on a fibrinogen-plasminogen substrate.

The Plasmin Inhibitors of Plasma

1964 ◽  
Vol 12 (01) ◽  
pp. 119-125 ◽  
Author(s):  
Y Shamash ◽  
A Rimon
Keyword(s):  
Human Plasma ◽  
New Method ◽  
Normal Amount ◽  
Caseinolytic Activity ◽  
Before And After ◽  
Plasmin Inhibitors

SummaryA new method for the assay of plasmin inhibitors in human plasma is described. The method consists of determination of the caseinolytic activity of a standard plasmin solution before and after incubation with the inhibitor, with lysine added to the mixture as a stabilizer of plasmin. Using this method, it was found that plasma contains enough inhibitors to inactivate 30 caseinolytic units of plasmin, or 10 times the normal amount of plasminogen in human plasma.

AGGLUTINATION INHIBITION REACTIONS FOR THE DETERMINATION OF GONADOTROPHINS

1969 ◽  
Vol 62 (1_Suppl) ◽  
pp. S95-S112 ◽  
Author(s):  
A. H. W. M. Schuurs
Keyword(s):  
Immune System ◽  
Quantitative Determination ◽  
Haemagglutination Inhibition ◽  
Latex Agglutination ◽  
Literature Survey ◽  
New Method ◽  
Test Fluid ◽  
Main Application ◽  
Test Systems

ABSTRACT Various techniques for sensitising erythrocytes and latex particles with gonadotrophins, particularly with HCG, are described. The haemagglutination inhibition reactions are generally interpreted by means of »erythrocyte settling patterns«. By a new method of evaluating these patterns a relatively precise quantitative determination is possible. Latex agglutination inhibition reactions on slides are particularly suitable as rapid qualitative tests. In cases where the maximum attainable sensitivity of the agglutination inhibition tests is insufficient, e. g. for determining LH concentrations in urine, the hormone in the test fluid has to be concentrated or extracted. An alternative method is a modified haemagglutination inhibition test for large volumes which is applicable to unconcentrated urine. Due to non-specific inhibitions the above-mentioned tests cannot be applied to unprocessed serum. Agglutination inhibition tests with HCG are already well advanced, pregnancy diagnosis being their main application. Now that highly purified HCG is available, a satisfactory specificity for these tests can be attained. If the immune system for HCG is used for estimating LH, it has to meet additional specificity requirements. Furthermore, the measure of cross-reaction and the choice of standard merit special attention. Finally, a literature survey is given of test systems in which LH and FSH were used as antigens.

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