22 Active or passive movement causes a temporary reduction in muscle stiffness which 23 gradually returns to baseline levels when the muscle remains still. This effect, 24 termed muscle thixotropy, alters the mechanical properties of the joint around 25 which the muscle acts, reducing its resonant frequency. Since physiological tremor is 26 affected by joint mechanics, this suggests that prior ...

Today, the dry eye syndrome therapy is based on techniques aimed at compensating for loss of moisture in conjunctival cavity (the so-called tear replacement therapy) either by additional moistening surface, or maintaining cavity. Traditionally, first step to moisturise and artificial products leader this area. In recent years, natural mucopolysaccharides are one basic components tears that attr...

Optimal medication should be characterized by good bioavailability, rapid onset of action, a long period of therapeutic activity, with preserved high safety profile and the lowest possible risk of side effects. Therefore, in addition to traditional drug administration routes, such as oral or injection, novel methods for drug applications, for example in the form of a nasal application have been...

The thixotropic properties of filamentous actin suspensions were examined by a step-function shearing protocol. Samples of purified filamentous actin were sheared at 0.2 sec-1 in a cone and plate rheometer. We noted a sharp stress overshoot upon the initiation of shear, indicative of a gel state, and a nearly instantaneous drop to zero stress upon cessation of shear. Stress-overshoot recovery w...

Steady state viscosity and thixotropy of hydrophobically modified hydroxyethyl cellulose ~HMHEC! and nonassociative cellulose water solutions are studied. Although all the samples are shear thinning, only the HMHEC is thixotropic, since the migration of hydrophobes to micelles is controlled by diffusion. The Cross model fits steady state curves. The Mewis model, a phenomenological model that pr...

The ~1.5 × 10−20 J which is considered a universal quantity and is associated with the movement of protons in water also relates to the ratio of the magnetic moment of a proton divided by its unit charge, multiplied by viscosity and applied over the O-H distance. There is quantitative evidence that thixotropy, the “spontaneous” increased viscosity in water when undisturbed, originates from the ...

The functional properties α-LA nanotubes and the gels formed during their synthesis were studied to evaluate potential applications. bioactivity of was improved by nanotubes, with significantly (p < 0.05) higher ACE-inhibitory (IACE) antioxidant activity (μmol TE/mg protein). IC50 (protein concentration inhibit 50% ACE activity) 281 ± 21 μg mL−1 1.28 0.01 μmol TE mg−1 protein. Besides, IACE-val...

The self-assembly and gelation behavior of a series of (R)-12-hydroxy-N-(ω-hydroxyalkyl)octadecanamides (HS-n-OH, where n = 2, 3, 4 and 5 is the length of the alkyl chain on nitrogen), as well as those of two ‘model’ compounds, N-(3-hydroxypropyl)octadecanamide (S-3-OH) and (R)-12-hydroxy-N-propyloctadecanamide (HS-3), have been investigated in a wide range of liquids. A unique aspect of some o...

We have studied the strain-rate dependency of the viscoelastic mechanical properties of human dermis from young (23-year-old) and old (87-year-old) donors using incremental stress–strain measurements. The elastic spring constant for elastic fibers was found to be strain-rate and age dependent, whereas that for collagen was only age dependent. Fibril lengths were observed to decrease with increa...