منابع مشابه
Gelation Temperature of a Gelatin Solution Determined by Diffusing Wave Spectroscopy
Diffusing Wave Spectroscopy (DWS) is a modern light scattering technique that is mainly utilized to probe the motion of particles in colloidal media. A microrheological analysis of the particle motion may further provide the medium’s rheological properties, namely the frequency-dependent storage and loss moduli, G’(ω) and G’’(ω), respectively. DWS can be applied to a rich variety of soft-matter...
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Chitosan can readily dissolve in a precooled aqueous alkali-urea solution, a solvent that has previously been developed to dissolve cellulose. Upon heating, the resulting solutions quickly become a gel. The thermal gelling of the chitosan solutions was studied by rheology. Initially, a temperature ramp test was used to determine the gelation temperatures (Tgel). It was found that Tgel does not ...
متن کاملStudies on Coagulation. I. On the Velocity of Gelation and Hydrolysis of Gelatin Sol.
GELATION of hydrophilic colloids has frequently been studied in regard to its 'gelation time' (usually called the coagulation time) i.e. the time necessary for the gelatinising of a sol. The definition of 'gelation time,' however, is somewhat arbitrary and differs with the observer. Some observers consider a sol is gelatinised, when the vessel containing it can be inverted without spilling. Oth...
متن کاملEffect of solvent hydrophobicity on gelation kinetics and phase diagram of gelatin ionogels.
We present a systematic investigation of the effect of solvent hydrophobicity (alkyl chain length) on the gelation kinetics and the phase states of the polypeptide gelatin in imidazolium based ionic liquid (IL) solutions. We have observed that IL concentration and hydrophobicity had dramatic influences on the thermal and viscoelastic properties of gelatin ionogels. Gelation concentration cg was...
متن کاملRole of microscopic phase separation in gelation of aqueous gelatin solutions.
Using a unique home-made cell for four-contact impedance spectroscopy of conductive liquid samples, we establish the existence of two low frequency conductivity relaxations in aqueous solutions of gelatin, in both liquid and gel states. A comparison with diffusion measurements using pulsed field gradient NMR, and circular dichroism spectroscopy, shows that the faster relaxation process is due t...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1983
ISSN: 0002-1369
DOI: 10.1080/00021369.1983.10865852