α-β Intramolecular Transformation of Myosin

Biosynthesis of Cellulose by Acetobacter Xylinum. III. X-Ray Studies of Preferential Orientation of the Crystallites in a Bacterial Cellulose Membrane

“…2, 1975 membranes. Gelatin, 9 myosin, 10 and regenerated cellulose films also show a selective uniplanar orientation when they are allowed to dry in sheet form. It is interesting to note that all of these materials which show a preferential orienting tendency have polar groups attached to fibrous molecules which exist as elongated crystallites.…”

X-ray Studies of Crystallite Orientation in Cellulose Fibers. II. Synthetic Fibers from'Bacterial Cellulose Membranes

“…non-cellulosic materials, it is extremely difficult to draw definite conclusions when the method is applied to natural fibers. Although bacterial cellulose membranes have little macroscopic resemblance to natural fibers, they offer a unique opportunity for studying certain fundamental problems relating to the fine structure of natural cellulose for the following reasons: (1) they possess a well-formed, natural cellulose, crystalline structure; (2) they exist as a uniform membrane in a highly swollen or gel condition; natural membrane, while with natural fibers it is necessary to use a swelling agent first,-a process which usually changes the native to the mercerized crystalline form; and (4) the size of the membrane specimen allows a direct correlation of the x-ray and other data, while a bundle of natural fibers is necessary for a satisfactory x-ray diagram. These advantages first suggested themselves in the course of confirming with x-rays the chemical results of Hibbert and Barsha (3) regarding the identity of membrane and cotton cellulose.…”