Genetic analysis of Gobiopterus brachyopterus (Oxudercidae) from Grati Lake and The genus potential misidentification.

The holotype of Gobiopterus brachyopterus originates from Grati Lake, Indonesia. It is locally called lempuk fish. The genus Gobiopterus has similar species, making identification difficult.

Effect of moisture and magnesium stearate concentration on flow properties of cohesive granular materials.

In this article the gravitational displacement rheometer (GDR) is used to characterize the effects of formulation composition and environmental conditions (moisture) on flow properties of cohesive pharmaceutical powders under unconfined conditions. The amount of moisture in the sample often has important effects on the physical and chemical properties of pharmaceutical solids. Properties such as flow, compaction, disintegration, dissolution, hardness and chemical stability are all influenced by moisture.

Influence of shear intensity and total shear on properties of blends and tablets of lactose and cellulose lubricated with magnesium stearate.

A new technique to quantify the effects of shear intensity and total shear on the homogeneity, flowability and bulk density of a lubricated free-flowing pharmaceutical blend and on properties of resulting tablets is presented. A modified Couette cylindrical cell with uniformly spaced pins is used to create a uniform shear environment. The range of lubricant concentrations explored is 0-2% (on a mass basis).