Insects are collected by nets and are killed with potassium cyanide gas slowly released in a capped wide mouth jar. Insects can be mounted and preserved in various ways. Most specimens are pinned, and, once dried, will keep indefinitely. Specimens too small to pin can be mounted on "points," on tiny "minuten" pins or on microscope slides. Large and showy [...]
Lac cultivation is a complicated process, so the cultivators should know well about the inoculation, swarming period and harvesting of lac. Inoculation of Lac: The first procedure in the lac cultivation is the inoculation of lac insect. Inoculation is the process by which young ones get associated properly with the host plant. Inoculation is of two types: 1. Natural Inoculation: [...]
It is the surface area for cell growth. A unit volume of medium is only capable of giving a finite yield of cells. Factors which affect the yield are: pH, oxygen limitation, accumulation of toxic products (e.g. NH4), nutrient limitation (e.g. glutamine), spatial restrictions, and mechanical/shear stress. As soon as one of these factors comes into effect, the culture is [...]