ULTRAVIOLET SPECTRA OF CELLULOSE ACETATES IN PHOSPHORIC ACID
نویسندگان
چکیده
منابع مشابه
Dissolution of microcrystalline cellulose in phosphoric acid--molecular changes and kinetics.
In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 degrees C. The structural changes of MCC were determined in detail with X-ray powder diffraction, solid-state cross-polarization magic ang...
متن کاملAlloxan and dialuric acid; their stabilities and ultraviolet absorption spectra.
It was the purpose of this investigation to determine the ultraviolet absorption spectra of alloxan and dialuric acid. Previous investigators (l-3) reported that these substances had absorption spectra without definite maxima. However, since preliminary studies indicated that maxima were present under certain conditions, it was thought that a more careful investigation should be made. Although ...
متن کاملThe Recovery of Uraniumfrom Phosphoric Acid
Commercialization of three processes (OPPA, DBPA-TOPO and OPAP) has shown that the DEPA-TOPO process offers the best technology available today for the recovery of uranium from wet-process phosphoric acid. Uranium recovery plants using this process have been successfully operated in the United States, Belgium, Canada and Taiwan. Operating experience from these plants has led to a significant re...
متن کاملUltraviolet Difference Spectra of Pepsin
A shift of pH of pepsin solutions from 4.6 to 1.0 gives rise to spectral displacements in the ultraviolet. If represented as difference spectra three peaks with maxima at 2770, 2850, and 2930 Angströms are present which can be attributed to the tyrosine and tryptophan residues in the protein. On mild autolysis of pepsin at pH 2.0 the absorbancy in the ultraviolet further decreases. Although som...
متن کاملContinuous Melt Suspension Crystallization of Phosphoric Acid
A continuous melt suspension crystallization process has been presented for the purification of the phosphoric acid in this study, which is performed in the cascade of a mixed suspension mixed product removal (MSMPR) crystallizer and a gravity wash column for the subsequent solid-liquid separation. Dynamic behavior in the crystallizer and role of reflux ratio on the purification efficiency of c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Sen'i Gakkaishi
سال: 1959
ISSN: 0037-9875,1884-2259
DOI: 10.2115/fiber.15.383