Viscosity Essays

BS1003 – Organic Chemistry Practical 1 Laboratory Report Name: Tristan Chan Yew Kit, U1640436J (T8) Effects of Dichloromethane(DCM) in Extraction of Caffeine from Tea Leaves Purpose To investigate the ability for Dichloromethane(DCM), a moderately polar organic solvent, to extract aqueous caffeine molecules, originating from Tea Leaves suspended in water. Introduction Caffeine, defined chemically as 1,3,7-trimethylxanthine (C8H10N4O2), is an alkaloid that can be found in tea leaves, coffee and many

3.4. Swelling behavior The swelling behavior of the DCMC crosslinked gelatin-PEG composite hydrogel fibers is studied and presented in Fig. 3. It shows that the equilibrium swelling ratio of the hydrogel fibers is very high, which is found to be between 89 and 93%. The result indicates that the hydrogel fibers are effective biomaterials for using as wound dressings since they can absorb wound exudates and provide moist environment for wound leading to acceleration of wound healing. The water in hydrogel

Von Mises [3] states that “the forces due to viscosity appear as products of μ and expressions that have the dimensions area times (velocity / length)”. By further investigation, the mathematical analysis of these principles leads to a system of partial derivatives known as the Navier-Stokes equations

‘’Classic narrative is basically linear. It is like a river which has a source in an inland spring’’ (Potter, 1990). The three-act structure was derived from Aristotle, he claimed that a linear narrative follows a straight line, it starts at the beginning proceeds to the middle and moves to the end (Dancyger, 2013). It is presented in a logical form by showing what happens from one point of time to another without including the use of flashbacks or flashforwards (McKee, 1999). Linear stories are

Abstract: This lab is envisioned to experimentally authenticate the theoretic formulations leading hydrostatic force and pressure middle on flooded flat superficial. The impartial of this laboratory is to regulate the hydrostatic insertion interim on plane superficial engrossed in water when the surface is partially submerged or fully submerged. Also to determine the untried center of pressure and the theoretic center of pressure for every of the trials executed. Introduction: When the quadrant is

TIVA may be favoured as the anesthetic technique of choice for the following reasons ADVANTAGES OF TIVA: 1. Rapid smooth induction and maintenance of anesthesia Induction of anesthesia with propofol is smooth and associated with a low incidence of excitatory side effects. Doses of 1 to 2.5 mg/kg (depending on patient age, physical status, and use of premedicant drugs) induce anesthesia in approximately 30 seconds. The speed of onset and the dose of propofol needed for induction are dependent on the

Airfoil Terminology, Its Theory and Variations As Well As Relations with Its Operational Lift Force and Drag Force In Ambient Conditions Author Names: Dr V.N. Bartaria (H.O.D Mechanical engineering LNCT Bhopal) Shivani Sharma (B.E. Mechanical engineering Pursuing M.tech) Abstract: It is a fact of common experience that a body in motion through a fluid experiences a resultant force which, in most cases is mainly a resistance to the motion. A class of body exists,

Should I Major in Nursing Science or not? Nursing is hard job. Nurses who work hard by taking care of the patient. I am in college with no career choice. I had no experience about what it will be like to be a nurse. My mom always wanted me to be an accountant. So I decided to major in accounting. Accounting is all about numbers. And I was good at math in high school. I was enjoying math, and never got bored when I was doing my homework. However, I like to study about human body structures. Taking

Did you know that around 218 million people die each year from natural disasters? Some people don’t even know that some of the common natural disasters can possibly happen in their very own back yard. These disasters are way more powerful than they may seem; they can tear down houses, wipe out forests, and split the earth's crust in half. I bet you wish there was a way to stop the terrible disasters from killing all of these innocent people but, sadly, you can't. Scientist can predict when some of

For pool owners, there is nothing more exhausting than cleaning the pool itself. Perhaps the common denominator as to why people want to own a pool is that they want to relax and enjoy it with their family and friends. That is the reason why most pool owners prefer to buy robotic pool cleaners. Having fun in the water is only the peak of an iceberg of having a pool. The rest of the iceberg lies on pool maintenance. It would probably take more time cleaning the entire pool than the actual leisure

D28HA-HYDRAULICS & HYDROLOGY A LAB EXPERIMENT PART A: PIPE FRICTION PART B: DESIGN EXERCISE NAME: Aishwarya Chengappa HW ID: H00201619 CONTENTS TOPIC PAGE PART-A 1. AIM 3 2. THEORY 3,4 3. DIAGRAM & PICTURES 4 4. PROCEDURE

different rate in the fluids given was because the fluid’s viscosity varies. The viscosity of a fluid can impact an object that you drop into it, because there’s a resistance of some sort impacting the rate of which they fall. For example, when both spheres were dropped at the same time into a graduated cylinder of water, the steel sphere hit the bottom of the graduated cylinder before the glass sphere, because the viscosity of water is low. The viscosity of water is very dynamic based on the temperature

Building at Michigan Technological University. The primary objective of this lab was to: Find the viscosity in cP of 10 wt% sucrose, 20 wt% sucrose, 30 wt% sucrose, 40 wt% sucrose, 45 wt% sucrose, 50 wt% sucrose, 60 wt% sucrose, 65 wt% sucrose, and 2 mystery sucrose and water solutions at room temperature, 40°C, and 60°C. The secondary objectives of the lab were to: Find the dependence of viscosity in cP on the concentration in wt% sucrose and temperature in °C. Create functions for the relationships

water and oil. Density was measured using the mass of a liquid in a known volume, the specific gravity was determined by using a hydrometer, and viscosity was measured by using the weight of a falling mass to spin a cylinder completely submerged in the test fluid. The values determined from these tests could then be compared to known values to viscosity and density. Theory A fluid is defined as “a substance that deforms continuously under the action of an applied shear force or stress” (OCE Lab

gm while keeping other variables constant by method reported in section. The effect of varying gelling agent concentration on viscosity and drug content are reported in Table 5.1 and shown in Figure 5.2 and 5.3 respectively. Table 5.1: Effect of varying Gelling Agent concentration on viscosity and Drug content of Emulgel Batch Code Gelling agent concentration (gm) Viscosity (cp) % Drug

>100 μm, 5% >200 μm; Kollidon 90: 90% >200 μm, 95% >250 μm Viscosity (dynamic) : The viscosity of aqueous povidone solutions depends on both the concentration and the molecular weight of the polymer employed Solubility: Freely soluble in acids, chloroform, ethanol (95%), ketones, methanol, and water; practically insoluble in ether, hydrocarbons, and mineral oil. In water, the concentration of a solution is limited only by the viscosity of the resulting solution, which is a function of the K-value

combined experimental and computational methodology. The speed of sound (u), density (ρ) and viscosity ( ) values are measured for binary mixtures of N-methylformamide with ketones over the entire range of mole fraction at temperatures T= (303.15 to 318.15) K, at atmospheric pressure. From the experimental results, the values of excess molar volume ( ), excess isentropic compressibility (κsE), deviation in viscosity (η) and excess Gibbs free energy of activation of viscous flow ( ) are evaluated. The

pressure of air. The higher the surface tension, The more molecules can stay together --------------------------------------------------------------------------------------------------V Viscosity questions A substance that has high viscosity is honey A substance that has low viscosity is water The viscosity range is

of a high viscosity composition, and/or interaction between molecules in the composition and/or tissue. Low molecular weight, small chain polysaccharides require higher concentrations to produce viscous, gel-like materials, and tend to be less desirable. One of the preferred polysaccharides is hydroxypropylmethylcellulose which is preferably used in a sterile aqueous solution. As a sterile solution it may be formulated to have a molecular weight exceeding 80,000 daltons and a viscosity of at least

5. Approaches to model cytoplasmic compartmentalization Cytoplasmic viscosity and hinderance to free diffusion has been modelled in three different ways: 5.1 Concentrated Macromolecular solution Early models assumed the cytosol to be an unstructured dense bag of macromolecules. In these cases, the tracer can essentially diffuse only within the space present between the macromolecules. The DCR (Diffusion Coefficient Ratio, η/ηο) for a tracer particle in