Search results
Results From The WOW.Com Content Network
Viscoelastic materials have elements of both of these properties and, as such, exhibit time-dependent strain. Whereas elasticity is usually the result of bond stretching along crystallographic planes in an ordered solid, viscosity is the result of the diffusion of atoms or molecules inside an amorphous material.
The most relevant physical properties for use in ophthalmic surgery are viscoelasticity, viscosity, pseudoplasticity, and surface tension. [2] These physical properties of an OVD are consequences of molecular chain length, and molecular interactions between chains. The rheologic properties of an OVD directly affect its clinical characteristics ...
It forms a viscoelastic solution in water. Mechanical protection for tissues (iris, retina) and cell layers (corneal, endothelium, and epithelium) are provided by the high viscosity of the solution. Elasticity of the solution assists in absorbing mechanical stress and providing a protective buffer for tissues. In facilitating wound healing, it ...
The nucleus is then removed through the tunnel using an irrigating vectis. Viscoelastic is injected above and below the nucleus to protect the endothelium. A bridle suture is used to steady the globe. The irrigating vectis is inserted under the nucleus, then withdrawn towards the tunnel until the nucleus starts to enter the tunnel.
The ratio of the loss modulus to storage modulus in a viscoelastic material is defined as the , (cf. loss tangent), which provides a measure of damping in the material. tan δ {\displaystyle \tan \delta } can also be visualized as the tangent of the phase angle ( δ {\displaystyle \delta } ) between the storage and loss modulus.
The Los Angeles City Attorney's Office filed a lawsuit this week against Blueground, a short-term rental company that advertises properties. LA lawmakers threaten landlords with fines as high as ...
The properties are better studied using tensor-valued constitutive equations, which are common in the field of continuum mechanics. For non-Newtonian fluid's viscosity , there are pseudoplastic , plastic , and dilatant flows that are time-independent, and there are thixotropic and rheopectic flows that are time-dependent.
FD&C Red No. 40, more commonly known as red 40, is making headlines again as lawmakers debate whether food dyes should remain legal in the United States.. The dye, which has been registered with ...