Collagen classification

Quaternium-79 hydrolyzed collagen Classification Quaternary ammonium chloride Formula [R-N(CH3)2CHCHOHCH2-R rcr, R = oleyl/palmityl/palmitoleyl, R = hydrolyzedcollagen Uses Antistat, hair conditioner, skin conditioner in cosmetics Trade Name Synonyms Mackpro NLP [M cl nty re http //www.mcintyregroup. com] Quaternium-79 hydrolyzed keratin Classification Quaternary ammonium chloride/lactate... 

Table 48-2. Classification of collagens, based primarily on the structures that they form. ...

Table 1 Classification of collagen in mammals Known and estimated information about collagen...

Ascorbic acid (vitamin C) is an alpha-hydroxy acid derivative. It has been shown to stimulate collagen production and reduce melanin production. Under identical conditions, classification of the acids described above in order of strength would give the top three as ... 

The development of a model for the entire cartilage spectrum, without the use of pure-component spectra, holds much promise because it does not require user intervention. In addition, the incorporation of many (15-i-) factors into a least-squares model may be necessary to describe the interactions between collagen and proteoglycan molecules. Moreover, the incorporation of a parsimony measure to reduce noise contributions in model development may provide a better classification of osteoarthritic-related damage. 

The diffraction patterns originally used for this classification were of the wide-angle type. In 1936 Clark, Parker, Schaad, and Warren (54) and Wyckoff, Corey and Biscoe (217) discovered that toward the center of the collagen diffraction pattern, in a region hitherto obscured by bulky traps for the undiffracted beam, occur a number of diffractions indicating structures along the fibril axes with periods of possibly several hundred... 

The structural significance of the X-ray diffraction and electron optical observations is discussed in further detail below. At the moment these physical observations may be regarded as empirical means of segregating or distinguishing members of a class. Those aspects of the physical observation which are important for identification and classification of collagens now follow. 

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