Notes and Study material for Exams
Preparation and properties of commonly used dyes Dye, substance used to impart colour to textiles, paper, leather, and other materials such that the colouring is not readily altered by washing, heat, Light, or other factors to which the material is likely to be exposed. Dyes differ from pigments, which are finely ground solids dispersed in … Read more
Microscope Microscope, instrument that produces enlarged images of small objects, allowing the observer an exceedingly close view of minute structures at a scale convenient for examination and analysis. Although optical microscopes are the subject of this ARTICLE, an image may also be enlarged by many other wave forms, including acoustic, X-ray, or electron … Read more
Universalizing Science and Technology Literacy Scientific and technological literacy, in its broadest sense, means much more than simply being able to read, understand and write about science and technology, however important these are. STLalso includes the ability to apply scientific and technological concepts and process skills to the life, work and culture of one’s own … Read more
Introduction To Alkaloids (nicotine and cocaine) Alkaloids, any of a class of naturally occurring organic nitrogen-containing bases. Alkaloids have diverse and important physiological effects on humans and other animals. Well-known alkaloids include morphine, strychnine, quinine, ephedrine, and nicotine. Alkaloids are found primarily in Plants and are especially common in certain families of flowering plants. More … Read more
Transpiration is the process by which moisture is carried through Plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the Atmosphere. Transpiration is essentially Evaporation of water from plant leaves.The survival of plants is dependent on a number of factors which include water, Minerals, gases, and nutrients … Read more
The Human genome project was a large, international and multi-institutional effort that took 13 years from 1999 and $2.7 billion to produce a blueprint of the sequence of genes and space between genes that make up a typical human genome. Following were the observation of HGP (read)- 99% of the total human DNA is junk … Read more
Production of modern Vaccines Live Attenuated Vaccines Live vaccines are derived from “wild,” or disease-causing, viruses or bacteria. These wild viruses or bacteria are attenuated, or weakened, in a laboratory, usually by repeated culturing. For example, the measles virus used as a vaccine today was isolated from a child with measles disease in 1954. Almost … Read more
Circulatory System v The circulatory system can be compared to a system of interconnected, one-way roads that range from superhighways to back alleys. v Like a Network of roads, the job of the circulatory system is to allow the transport of materials from one place to another. v As described in Figure below, … Read more
Steroids Steroids are naturally made by our bodies in small amounts. They help to control many functions. But steroids can also be made artificially and used as drugs to treat different diseases, including cancer. Steroids used to treat cancer are usually a type called corticosteroids. These are man made versions of the HORMONES produced by … Read more
Vermiculture Vermiculture means artificial rearing or cultivation of worms (Earthworms) and the technology is the scientific process of using them for the betterment of human beings. Vermicompost is the excreta of earthworm, which is rich in humus. Earthworms eat cow dung or Farm Yard Manure along with other farm wastes and pass it … Read more