Generation Time The time required for a cell to divide or a population to divide is known as the generation time. For bacteria it is the time, required for a complete fission cycle. Generation time depends on nutrient media, pH, temperature etc. The generation time “g” can be determined from …

Solid, liquid, gel (semisolid) designed to support the growth and supply nutrients to any cell or microorganism is a culture medium. It is a special medium used in microbiological laboratories to grow different microorganisms. A microbiological culture medium must contain: Source of energy (chemicals for chemotrophs and lights for phototrophs) …

In microbiology, the term isolation refers to the separation of a strain from a natural, mixed population of living microbes, as present in the environment, in order to identify the microbes of interest. Isolation can be done from, for example, water or soil flora or from living beings with skin …

Direct microscopic count The direct total cell count involves counting the number of cells in a simple microscopically. This technique is very similar to that used in blood cell counts. Scientists perform a direct microscopic count using a specially designed slide called a Petroff-Hausser cell counter/ counting chamber/ cytometer/ hemacytometer …

Food is any substance consumed to provide nutritional support for the body. Food contains essential nutrients such as carbohydrates, fats, proteins, vitamins or minerals. Food is ingested by an organism and assimilated by the organisms cells to provide energy, maintain life or stimulate growth. Classifications of food According to Martin …

Water pollution is any undesirable changes in physical, chemical and biological characteristics of water that may harmfully affect the life or create a potential health hazard for living organisms. When the pollutant is undesirable microorganisms, the phenomenon is called microbial water pollution. Through ordinary exposure to air, soil and effluent …

Getting Opportunity to go for Higher Studies in a Canadian University is kind of a dream which is imagined by many of us. To make this dream true one has to go through a path of hard work, sincerity and patience. This post is copied and edited from a post …

The change in arrangement of vascular tissues of roots having separate strands of phloem and xylem with exarch protoxylem to collaterally placed phloem and xylem with endarch protoxylem of stem is commonly referred to as root–stem transition. In higher plants root and shoot form a continuous axial structure. In this article, The Transition of Root and Stem …

Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem. Herbaceous plants mostly undergo primary growth, with little secondary growth or increase in thickness. Secondary growth is initiated by the activity of the vascular cambium as …