This increased concentration and cross linking is responsible for increased durability and make it somewhat robust. Support materials must be able to withstand the back pressures encountered during normal separations without compressing. While most commercial packing materials meet this requirement, the build-up of particulate contaminants may restrict column flow and lead to high backpressures. Under these pressures, soft porous gel supports such as agarose beads will compress and increase the pressure even further causing collapse of the support structure. More mechanically stable supports (e.g.
 Dependence on Humidity Basically, Bakelite resistivity is strongly affected by the humidity and it is a slow process because several months are needed in order to stabilize the value of Bakelite’s resistance. Bakelite resistivity is inversely proportional to the humidity. By the increase in humidity, its resistivity decreases. , , .
Collegiate Athletes’ Perceptions of Adhesive Ankle Taping: A Qualitative Analysis by Erika Hunt and Sandra Short is a qualitative study to explore the athletes’ perceptions of adhesive ankle taping. Adhesive tape is a very popular treatment modality for athletic injuries because it can be used for retention of wound bandages, compression, stabilization, prevention of additional injuries, and protection of both acute injuries and recent injuries. Taping had been important of athletic training; the widespread belief in the effectiveness of ankle taping and the extremely high incidence of lateral ankle sprains among athletes’ results in the frequent use of adhesive taping on ankles in athletics today (Wilkerson, 2002, p. 280). Adhesive taping has been shown to decrease ankle sprain incidence by providing mechanical support and enhanced proprioception for foot-ankle complex (Cordova, Ingersoll, Palmieri, 2002, p. 281). The benefits of taping include ankle range of motion, strength, and neuromuscular control.
Abstract: The study of three phase flow in horizontal and vertical pipe are important phenomena in oil and gas industry due to extracting process involve liquid, solid and gas phase. The effect of the particle amount, the discharge of gas and liquid have investigated experimentally on pressure distribution in horizontal pipe have been studied in this work. The work carried out for horizontal pipe with outer diameter (3.175 cm). A spherical stainless steel has used as solid particle. Air and water have used as gas and liquid phase respectively.
Modeling of Contact Angle for a Liquid in Contact with a Rough Surface When a solid is in contact with liquid, the molecular attraction will reduce the energy of the system below that for the two separated surfaces. This is expressed by the Dupré equation Figure-1 2.1 Wenzel Model: The Wenzel model (Robert N. Wenzel 1936) describes the homogeneous wetting regime, as seen in Figure 2, and is defined by the following equation for the contact angle on a rough surface. where is the apparent contact angle which corresponds to the stable equilibrium state (i.e. minimum free energy state for the system). The roughness ratio, r, is a measure of how surface roughness affects a homogeneous surface.
Tack: the degree of surface stickiness of the adhesive; influences the strength of the bond between wetted surfaces 4.Surface energy: which influences wetting of different kind of surfaces. Materials Used: Hot melt glues usually consist of one base material with various additives. The composition is usually formulated to have a glass transition temperature (onset of brittleness) below the lowest service temperature and a suitably high melt temperature as well. The degree of crystallization should be as high as possible but within limits of allowed shrinkage. The melt viscosity and the crystallization rate (and corresponding open time) can be tailored for the application.
5.1.Scope of the Project The paint industry is growing at a very faster pace. It is expected to growth up to 20 percent in the next two years. Almost every major multinational has established or entrenched their presence and industry has become far more sophisticated in terms of the product that it manufactures, the way it sells to the customers snd in the technology that they use.At the 48th annual general meeting of IPA(Indian Paint Associations) held at kolkatta , President D.P. Basu said “ Rs 24,000 crore paint industry is likely to touch Rs 100,000 by 2020.” So the market situation is favourable to all the brands. Considering this scenario , the main scope of the project is that: It will help Dulux paint to understand what are the factors
All spectra were collected over a scanning range of 600–4000 at room temperature. Mechanical strength measurement The breaking tensile strength of a single fiber was measured with a (STM-5, SANTAM) tensile machine. The primary length of each fiber was adjusted at 10 cm, and the crosshead speed was 10 mm/min. Breakthrough pressure Wetting resistance of membrane is usually characterized by the breakthrough pressure (∆p) into the maximum pore using the Laplace-Young equation  that can be expressed as follows: . (1) where〖 σ〗_(1 )is the liquid surface tension, θ is the contact angle between the membrane surface and absorbent liquid and d_max is the maximum pore diameter in the membrane.