Talc Glidant 9. Magnesium stearate Lubricant 8.3 Preparation of matrix tablets Seventeen different tablet formulations were prepared by using various polymers. First three formulations (F1A, F1B, F1C) were prepared by Wet granulation, Roll compaction and Direct compression methods respectively. The formula was same for all three batches. Among these methods direct compression method was selected for further trials as it was a smooth process compared to Wet granulation and Roll compaction and as well as it was observed that: Granules obtained from wet granulation were very hard and caused weight variation of compressed tablets due to varying size of granules during compression.
Surfactant – Compounds that lower the surface tension between two liquids or between a liquid and a solid. Surfactants may act as detergents, wetting agents, emulsifiers, foaming agents, and dispersants. Micelle – An aggregate (or supramolecular assembly) of surfactant molecules dispersed in a liquid colloid. A typical micelle in aqueous solution forms an aggregate with the hydrophilic "head" regions in contact with surrounding solvent, sequestering the hydrophobic single-tail regions in the micelle centre. This phase is caused by the
Liquisolid system formula with (R value) of 35 and drug concentration in liquid vehicle of 10 % showed better flow properties and enhanced drug release. This formula was further optimized into orodispersible tablets. Zolmitriptan ODTs were prepared by direct compression method using: 1. different types of superdisintegrants (sodium starch glycolate, croscarmellose sodium, and crospovidone) each one with three different concentrations (2.5, 5 and 7.5 % w/w), 2. different coating materials (Aerosil 200 and cab-O-sil), 3. different carrier materials
The tire bead component includes the steel wire loop, apex or bead filler; the chafer, which protects the wire bead components; the chipper, which protects the lower sidewall; and the flipper, which helps hold the bead in place. The bead wire loop is made from a continuous steel wire covered by rubber and wound around with several continuous loops. The bead filler is made from a very hard rubber compound, which is extruded so as to form a wedge. The bead wire loop and bead filler are assembled on a sophisticated
Among these different cogulants, water is the strongest while mixture of NMP and water is the weakest. Commonly, NMP was added into water as the coagulant bath is to slow down the precipitation rate during phase inversion (consolidation process). The order of coagulant in the study from strong to weak is water > ethanol > mixture of 70% NMP and 30% water. In addition, the study revealed the finger-like structure could be obtained by membrane immersed into distilled water. Figure 2.14 shows cross sectional SEM images of PVDF of hollow fibre membrane fabricated at different concentration of ethanol added into water bath.
The chamber is partially filled with liquid in order to prevent air bubbles from entering the tubing. A particle filter is often located at the bottom outlet of the chamber Connection tubing: Usually 150 cm long and made of PVC; for special applications also available in other lengths and material Piercing spike: Depending on the type of container to be used with, the piercing spike is sharp (for rubber stoppers) or rounded and blunt (for bag insertion sites). It contains one channel for fluid and optionally a second channel for venting Vent: Upon opening of a cap or stopper air flows into the container. The vent usually is equipped with a bacterial filter Drop chamber: A drop generator is located at the top of the drop chamber, which produces drops of a certain size. The chamber is partially filled with liquid in order to prevent air bubbles from entering the tubing.
Various dental luting agents are available to dental clinicians, each of them has its own particularities and indications; thus, selecting which cement to use may be complicated. Resin cements are one type of composite consisting of resin matrix and filler inorganic particles. The bonding between resin matrix and fillers are created via inter phase agent. This inter-phase agent consists of silanes long chain molecule in which organic silica is a component. That means resin cements are composed of three phases that are structurally different; organic phase, inorganic phase and inter phase (48).
Formulation of topical gel containing plant extract  20 g gel was prepared by simple dispersion method. Different concentrations of Carbapol 934 were used to prepare the formulation. Required amount of Carbapol and adequate amount of purified water was taken in a beaker. It was mixed to get a uniform mixture using magnetic stirrer and kept overnight for swelling. 1 ml of the extract and Piperine was dissolved in ethanol and added to the polymer solution along with propylene glycol and methyl paraban with gentle stirring.
Clarification is a step which almost all beverage manufacturers have in order to ensure the good quality of their drink. In clarification, raw water is stored in a cylindrical tank wherein coagulants like ferric sulphate and aluminum sulphate added to the raw water. Immediately after the coagulants are added, flocculation of the suspended solid particles, organic compounds, and bacteria takes place. This is a part of the process wherein the impurities are absorbed by the coagulants. The coagulants with the impurities are then called floc and increase in size, which makes it easier to be trapped by the filters (Mitchell,