Deacetylation process is involving removal of acetyl groups from molecular chain of chitin in order to produce chitosan containing high degree chemical reactive amine group (-NH2). This property affects its physiochemical properties, biodegradability and immunological activity, so it considered an important property for chitosan. Also it can differentiate between chitosan and chitin by determining the content of the free amino groups in the polysaccharides. The degree of deacetylation of chitosan
The bulk density of a powder is the ratio of the mass of an untapped powder sample and its volume including the contribution of the inter particulate void volume. Hence, the bulk density depends on both the density of powder particles and the spatial arrangement of particles in the powder bed. The bulk density is expressed in grams per milliliter (g/ml) although the international unit is kilogram per cubic
Numerical averages were then calculated for a composite test score. (Swaminathan 1980) Physical properties of standardized value added products Puffed snack Bulk Density The bulk density was calculated by measuring the actual dimensions of extrudates (AACC, 2000). The diameter and length of extrudates were measured using Vernier caliper. The weight per unit length of extrudate was determined by weighing measured length (about 1 cm). the bulk density was then calculated using the following formula,
FORMULATION DEVELOPMENT AND OPTIMIZATION OF EPALRESTAT CONTROLLED RELEASE TABLETS AND THEIR IN-VIVO KINETIC STUDIES 1. Introduction Epalrestat is derivative of carboxylic acid which is aldose reductase inhibitor, which is an enzyme of the sorbitol (polyol) pathway. When there are high levels of glucose in the body it reduces sorbitol accumulation within the cell which is the main cause of the complication of diabetes mellitus(Steele, Faulds et al. 1993). There are no medications available to treat
content, % Marshall stability, kg Flow, mm Bulk density, g/cc Total air voids, % Voids in Mineral Aggregates, % Voids filled with bitumen, % 4.5 925.5 2.4 2.263 8.75 18.37 52.35 5 974.25 2.6 2.28 7.84 18.54 57.71 5.5 1158.9 2.7 2.32 5.69 17.61 67.68 6 1041.42 3 2.31 3.68 16.43 77.6 Table 8: Marshall properties of Normal Asphalt Concrete Mix prepared using Lime(1%) as filler material. Bitumen content, % Marshall stability, kg Flow, mm Bulk density, g/cc Total air voids, % Voids in Mineral Aggregates
control mixture at 14 days. The increase in the strength of 28 days was almost 16.31% compared to the control mix. It was found that increase in strength was about 41.23 Mpa compared with 37.20Mpa for the control mixture at 28 days. b) SPLIT TENSILE TEST RESULTS Table 9 Split tensile strength % of 7 days 14 days 28 days replacement Normal concrete 1.82 2.24 2.80 BC1 2.18 2.68 3.36 BC2 2.53 3.12 3.90 BC3 2.32 2.86
Stated by Andriesse (1988) degree of humification can be known by C:P ratio. The C:P ratio can be calculated by determination of organic carbon content in organic soil (which is relevant for agricultural development purposes) which the values can range from 12 to 60%. Generally, subsoil has lower organic carbon content than at the surface which at the surface value ranging from 58% while subsoil value from 25% (Kanapathy, 1976; Muniandy et al., 2009). Deep organic soils have large content of ligneous
The Levodopa effervescent floating tablets were prepared using different low density polymers (POLYOX different grades) in various drug polymer ratios for prolongation of gastric residence time and to improve the patience compliance. Methods: The Levodopa effervescent floating tablets were prepared by direct compression method. The floating tablets were evaluated for friability, thickness, hardness, weight variation test, drug content,in vitro release and floating properties. The drug excipients
strength and bulk properties of the membranes like membrane porosity, density, pore volume and amount of water saturation etc, On the basis of the study experimental results the effect of various parameters has been observed. Membranes have been prepared with a variation in the composition in the additive utilised which is sodium meta aluminate, cellulose is used as a binder agent in the sintering process. The sintering is carried out 1200 C inside the muffle furnace for a 14 hour hold. Bulk properties
cementitious materials will enhance the sustainable construction. Natural fibres are easily available and less in cost. The addition of natural fibres in concrete provides many advantages such as low cost, minimal health hazards, biodegradability, low density, desirable aspect ratio and relatively high tensile and flexural modulus. The inclusion of chopped fibre in concrete can increase many of the engineering properties such as fracture toughness, tensile strength, flexural strength, resistance to fatigue