Dairy tech C7-02a starter cultures and their functions| fermented milks | rheological properties คือ

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Dairy tech C7-02a starter cultures and their functions| fermented milks


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Dairy tech C7-02a starter cultures and their functions| fermented milks

Rheological Properties Of Dental Materials


covered in this video
Rheological Properties
Flow
Creep
Viscosity
Viscoelasticity
Types of Fluid Behavior
1. Newtonian (ideal) Liquids
2.Plastic liquids
3. Pseudo plastic (shearthinning) Liquids
4. Dilatant (shearthickening) Liquids

my instagram @thedazzlingdentist

Rheological Properties Of Dental Materials

What is RHEOLOGY? What does RHEOLOGY mean? RHEOLOGY meaning, definition \u0026 explanation


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What is RHEOLOGY? What does RHEOLOGY mean? RHEOLOGY meaning RHEOLOGY pronunciation RHEOLOGY definition RHEOLOGY explanation How to pronounce RHEOLOGY?
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/bysa/3.0/ license.
Rheology is the study of the flow of matter, primarily in a liquid state, but also as ‘soft solids’ or solids under conditions in which they respond with plastic flow rather than deforming elastically in response to an applied force. It applies to substances which have a complex microstructure, such as muds, sludges, suspensions, polymers and other glass formers (e.g., silicates), as well as many foods and additives, bodily fluids (e.g., blood) and other biological materials or other materials which belong to the class of soft matter such as food.
Newtonian fluids can be characterized by a single coefficient of viscosity for a specific temperature. Although this viscosity will change with temperature, it does not change with the strain rate. Only a small group of fluids exhibit such constant viscosity. The large class of fluids whose viscosity changes with the strain rate (the relative flow velocity) are called nonNewtonian fluids.
Rheology generally accounts for the behavior of nonNewtonian fluids, by characterizing the minimum number of functions that are needed to relate stresses with rate of change of strain or strain rates. For example, ketchup can have its viscosity reduced by shaking (or other forms of mechanical agitation, where the relative movement of different layers in the material actually causes the reduction in viscosity) but water cannot. Ketchup is a shear thinning material, like yoghurt and emulsion paint (US terminology latex paint or acrylic paint), exhibiting thixotropy, where an increase in relative flow velocity will cause a reduction in viscosity, for example, by stirring. Some other nonNewtonian materials show the opposite behavior, rheopecty: viscosity going up with relative deformation, and are called shear thickening or dilatant materials. Since Sir Isaac Newton originated the concept of viscosity, the study of liquids with strain rate dependent viscosity is also often called NonNewtonian fluid mechanics.
The term rheology was coined by Eugene C. Bingham, a professor at Lafayette College, in 1920, from a suggestion by a colleague, Markus Reiner. The term was inspired by the aphorism of Simplicius (often attributed to Heraclitus), panta rhei, \”everything flows\”
The experimental characterization of a material’s rheological behaviour is known as rheometry, although the term rheology is frequently used synonymously with rheometry, particularly by experimentalists. Theoretical aspects of rheology are the relation of the flow/deformation behaviour of material and its internal structure (e.g., the orientation and elongation of polymer molecules), and the flow/deformation behaviour of materials that cannot be described by classical fluid mechanics or elasticity.

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What is RHEOLOGY? What does RHEOLOGY mean? RHEOLOGY meaning, definition \u0026 explanation

Motiva Implants


So, today we’re gonna be talking about Motiva Implants, and what I thought we would do is we would compare it with one of the other implants, which used to be the market leader here. So, the Motiva Implant is this one here. This is an implant comparable, both round implants, and I’m gonna show you the difference between them, and why I’m almost exclusively using these ones here. So, the first thing you can say is this one has a lot more rippling. You can sort of see that there’s creases in the surface, sitting even there with this on this table here. And this one is not rippling. Rippling is an issue when you are leaning forward or when you move to the side and you can see some ripples in the skin. So, to have an implant that ripples a little bit less, is definitely a big bonus. Secondly, the feel of the implant. And so, if you look at this one here, and hard for you to feel on the other side of the screen, of course, but this one feels like a bit of a gooey bag, and this one just has a lot more of a softer feel. And the Ergonomix range is renowned for having a feel that feels a lot more like a normal breast. The next trick I wanna show you is what happens when these implants go vertical. So, if you can see this implant here, when I hold it vertical it has a bit of a gentle drop to it, it’s very similar to a normal breast, right? So that’s, it means that even though you’ve got a round implant, it doesn’t mean that it’s going to look excessively fake. And that implant could be moving all day long, you’re doing heavy exercise, or whatever, and despite all of that it’s still gonna look natural. And that can be a really big issue when you’ve got an anatomical or a teardrop implant, you’re doing exercise, if the implant rotates, it’s a very difficult problem to fix. The final thing I wanna show you is that you can sort of see from where you’re looking at this video, that this one looks a bit rougher and this one’s smoother. Technically, this one is a smooth implant, a very advanced smooth implant. The benefit of that is that risk of ALCL, which is a type of lymphoma, is meant to be zero with this. So, there’s a clear health benefit to try and choose an implant that decreases your risk of ALCL. Even though the risk with some of these more advanced, textured devices is anywhere between one and 5,000 and one in 80,000, why not choose an implant that looks better, feels nicer, has a lower risk of, well, a zero risk potentially of that ALCL at the same time? So, all in all, there are the two different types of implants. I think this one is by far the best. I’m almost exclusively using these Motiva Implants now. And if you come in, I can show you the implants facetoface, but they’re very good implants.

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Motiva Implants

Rheology | د/ محمود عبدالغنى


Rheology  | د/ محمود عبدالغنى

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