The ability to visualize or differentially identify microscopic structures is frequently enhanced through the use of histological stains. Histology is an essential tool of biology and medicine. The study of tissues bridges the gap between cell/molecular and organismal biology. In animals there are four major tissue types: Epithelial, Connective, Muscle, and Nervous tissues. Each tissue is classified based on the location, shape, and function of the cells which comprise them.
A synthetic lubricant contains more highly refined base oils than those used in conventional mineral oils, offering you superior protection and performance. Synthetic engine oils provide a variety of benefits that keep your engine running at optimal performance for years.
Lubrication is simply the use of a material to improve the smoothness if movement of one surface over another; the material which is used in this way is called a lubricant. Lubricants are usually liquids or semi-liquids, but may be solids or gases or any combination of solids, liquids, and gases.c) Dry lubricants: These include any lubricants, which are used in solid form, and may be bulky solids, paint-like coatings, or loose powders. (d) Gases: The gas usually used in gas bearings is air, but any gas can be used which will not attack the bearings, or itself decompose.