منابع مشابه
Its Bearing on the Constitution of Cephalin
However, a scrutiny of all the work on lecithin reveals a remarkable incompleteness of each individual investigation. A rigorous proof of the accepted theory requires for lecithin an element,ary composition of C = 65.60, H = 10.79, N = 1.74, P = 3.86. It further requires that the nitrogen of the molecule should be composed entirely of choline. Hence, lecithin should not contain even a part of i...
متن کاملThe partial thromboplastin (cephalin) time test.
Nine partial thromboplastin (cephalin) reagents have been compared in a parallel investigation of groups of patients on ;long-term' anticoagulants, a group with moderate haemophilia, and patients on heparin infusion. Results with the seven commercial reagents and a human cephalin extract have been correlated with those of a specially prepared and standardized reference preparation of human brai...
متن کاملThe R6le of Cephalin in Blood Coagulation
The process of blood clotting is very complex. As it occurs normally, it is the result of many factors not well understood. The progress made in recent years was due to the fact that ways were found to separate the many factors into groups, some of which control definite phases of the complex process of blood clotting. The phase best understood is that of the conversion of fibrinogen into fibri...
متن کاملImproved Quantitation of Cephalin-cholesterol Flocculation Test.
A rapid turbidimetric method for the determination of cephalin-cholesterol flocculation is described. Greater specificity and photometric sensitivity have been achieved along with adequate precision. The test is standardized with the conventionalbarium sulfate turbidity standards usedfor other laboratory procedures. Definition of results in turbidity units is proposed, and photometric standardi...
متن کاملThe Electrometric Titration of Lecithin and Cephalin”
It has been recognized for some years that lecithin is an internally neutralized compound (1). The neutralization takes place between a strongly acidic group and a strongly basic group. Solutions of lecithin therefore may be expected to show no buffering power within the physiological range and this has been observed to be the case (24). The internal neutralization of lecithin has led to the pr...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1916
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)87474-9