need to prepared suspension by adding suspending agent and different type of surfactant A pharmaceutical suspension is a coarse dispersion in which insoluble solid particles are dispersed in a liquid medium. Particles of suspension are visible to the naked eye when they are left floating around freely in a solvent. The internal phase (solid) is dispersed throughout the external phase (fluid) through mechanical agitation, with the use of certain excipients or suspending agents. Unlike colloids, suspensions
3 Wettability of Roughened Surfaces Wettability of a surface depends on the chemical nature of the liquid but can also be strongly affected by surface roughness [115-117]. The contact angle measurement and liquid break test were conducted to assess wettability of the liquids. The liquid break tests results of the roughened surfaces by imprinting of injection mould are summarised in Table 5.13. Table 5.13 Liquid break test results of various materials roughen surface prepared by imprinting of
the success of root canal therapy mainly depends on the elimination of pathologic microorganisms and their byproducts followed by three dimensional obturation of the root canal space.To achive this challenging task, a biologically acceptable solid or semi solid obturating material in conjuction with root canal sealers is advocated in endodontic literatures. Guttapercha is the most widely used core material for obturation till date. Its property of inertness ,plasticity and solvent solubility
There once was a boy named Raindrop. I’ve got to admit, I always found that a pretty weird name for a raindrop. It’s almost like calling a newborn baby “Human,” but I’m not going to judge the parent’s name choice. They can do as they please. Anyway, they lived a normal life in their water house with their damp dog and soaking cat. Things were good for all of them. You know, the normal ocean lifestyle. Raindrop had a sister named Flood and a baby brother named Hail, and they lived in the Atlantic
system. It contains therapeutically active ingredient / drug, dissolved or suspended in compressed or liquefied gas in a sealed container. The delivery of the therapeutically active drug is done by different forms which includes Spray , Foam , Solid Stream though depending on the capability of the compressed or liquefied gas . Also termed as pressurized package usually when it’s a complete product. (1) It is an inhalation therapy or is a needle free method which exists for 4000 years ago
Is part or solids.Is the behavior or pebax.Is the ability deformed matirel body to be the same as before.Elastic properties is tryin to chnage someone or something back how they were.It is similar to physical properties that dont change.Is of solid materials.Has to be able to go to its original shape.It contains rubber and steel.Elastic properties can change anything that was changed before back how it was so then it will be how itb was before.For example is if you accidently delete something
Surfactants are substances that are adsorbed onto the surface/interface of a system and alter the surface/interfacial energy of the same. They generally consist of two parts, hydrophobic head and hydrophilic tail. Surfactants can be classified on the basis of effect, origin, structure and applications and can be further sub classified on the basis of chemical structure as anionic, cationic, non-ionic and zwitterionic surfactants [21]. Anionic surfactants have negatively charged head group and positively
Surface treatment functionalization of CNWs The CTAB coupling agent was used to change the characteristic of CNWs from hydrophilic to hydrophobic. In order to change the surface character of CNWs from hydrophilic to hydrophobic, the CTAB coupling agent was employed. Hydrophobization treatment occurs by electrostatic adsorption of ammonium groups of CTAB to sulfonate functional groups on the surface of nanowhiskers. The reaction between a CTAB molecule
active ingredient in most cleaning materials is called the surface-active agent or surfactant. Many types of surfactants exist, but their action in the cleaning process is fundamental the same for all types of surfactants. Oil-based dirt has to be cleaned from a surface. The cleaning process can be though to occur in three stages, which are: a) Removal of the oil from the surface, b) Prevention of the oil from re-depositing on to the surface and c) Dispersion of the oil in the cleaning solution
//Surface micromachining Benefits of surface micromachining are I) spacer and structural specifications like thicknesses, can be smaller than 10 μm in size. II) the footprint of micromachined device can be smaller than bulk wet-etched devices II) surface microstructures have tolerance if we compared it to bulk wet-etched devices. The main disadvantage is the weekness of surface microstructures to handling, particulates and condensation during manufacturing. Micromachining of Polysilicon