This part is continuation of Part 1 of the topic!!     4. প্রফেসর শর্টলিস্ট করার কাজ শেষ, এখন কি করব? এখন হচ্ছে আপনার সবচাইতে গুরুতপুর্ন পদক্ষেপ। প্রফেসর দের কে ইমেইল করা। ইমেইল করার সময় অনেকগুলো বিষয় মাথায় রাখতে হবে। আমি সেই ব্যাপার গুলো একটা একটা করে পয়েন্ট আকারে …

Control of Microorganism by Heat Heat generally appears to kill micro-organisms by denaturing their enzymes: the resultant changes to the three-dimensional shapes of these proteins inactivate them. Heat resistance varies among different microbes. These differences can be expressed through the followings; Thermal death point (TDP) is the lowest temperature at …

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 …

Milk is a highly nutritious food that can be obtained from a variety of animal sources such as cows, goats, sheep, and buffalo, as well as humans, for human consumption. However, the high nutrient content of these milk, which includes proteins, fats, carbohydrates, vitamins, minerals, and essential amino acids all …