Liposome disintegration by either ultrasonic vibration or sodium cholate solubilization was investigated as a function of cholesterol (CH) content in the egg phosphatidylcholine (PC) liposome membrane. Turbidity changes were used as an indication of the membrane stability to these stresses. First-order disintegration constants (kufor ultrasonic stress and ksfor sodium cholate solubilization) we...

The current study examines the feasibility of placing a piezoelectric membrane or &&eel'' in the wake of a blu! body and using the von KaH rmaH n vortex street forming behind the blu! body to induce oscillations in the membrane. The oscillations result in a capacitive buildup in the membrane that provides a voltage source that can be used, for example, to trickle-charge a battery in a remote lo...

Current techniques available for the characterization of membrane are destructive, including scanning electron microscopy, mercury intrusion porosimetry and size exclusion of particles. An alterative technique based on ultrasonic frequency domain reflectometry (UTDR) that allows easy, non-invasive and real-time analysis of membrane morphology would be of significant value to the membrane indust...

Presented is a total-Lagrangian displacement-based non-linear finite-element model of thin-film membranes for static and dynamic large-displacement analyses. The membrane theory fully accounts for geometric non-linearities. Fully non-linear static analysis followed by linear modal analysis is performed for an inflated circular cylindrical Kapton membrane tube under different pressures, and for ...

vibration generated by vehicles during road transport has an important effect on the agricultural products damage process, particularly vegetable and fruit. modulus of elasticity is one of the most important mechanical properties of fruits and its variation can be described as one of the damage criteria during transportation. this research was conducted to evaluate the effects of vibration para...

this research is carried out to design and manufacturing of lathe vibration tool and their tests. firstly, one-dimensional vibration tool is designed and made of the bending vibration mode. one-dimensional vibration tool with half piezoelectric rings is considered to excite the bending mode of tool. structure of vibration tool is designed in abaqus software about 20 khz and then is made with re...

This review discusses information about the structure and function of calcium channels in plasma membrane mitochondria heart, pharmacological methods for modulating their conductance. Experimental data are presented that characterize change energy metabolism cardiomyocytes against background transformation conductivity L-type cell a non-invasive model vibration-mediated (56 sessions total verti...

background: deficiency of attention and concentration is one of great reasons of traffic incidents and it covers between 20 to 50 percent of events due to careless and mindedness. studies show that attention and concentration are considered as one of important cognitive components in safe driving. vibration is an important physical effect in all vehicles. till now has not been any organized stu...

The coupled dynamic model of the intermediate and tail gearboxes’ spiral bevel gear-oblique shaft-laminated membrane coupling was established by employing hybrid modeling method finite element lumped mass. Among them, equation shaft constructed Timoshenko beam; gears were derived theoretically lumped-mass method, where effects time-varying meshing stiffness, transmission error, external imbalan...

Cochlear hair cells convert sound vibration into electrical potential, and loss of these cells diminishes auditory function. In response to mechanical stimuli, piezoelectric materials generate electricity, suggesting that they could be used in place of hair cells to create an artificial cochlear epithelium. Here, we report that a piezoelectric membrane generated electrical potentials in respons...