Added on 07 April 2009
Blood coagulation or Hemostasis is the cessation of bleeding from a cut or several vessels. When blood is shed, it loses fluid nature in a few minutes and sets into a semisolid jelly. This phenomenon is called coagulation or clotting. On holding back, the clot retracts to a smaller volume and presses out a clear straw colored fluid called the Serum. Serum does not clot any further…..
Posted in Biology
Added on 06 April 2009
Rubber is a natural polymer of Isoprene (2-Methyl -1, 3 – Butadiene). It is a linear, 1, 4 – addition polymer of Isoprene.
Natural rubber has elastic properties and it undergoes long range reversible extension even if relatively small force is applied to it. Therefore, it is also known as Elastomer. Natural rubber is prepared from latex which is a Colloidal Solution of Rubber in Water…..
Posted in Chemistry
Added on 05 April 2009
Krebs cycle (also known as Citric Acid Cycle or Tricarboxylic Acid Cycle) is a step wise cyclic process which is used to oxidize the pyruvate formed during the glycolytic breakdown of glucose into Carbon Dioxide (CO2) and Water (H2O). It also oxidizes acetyl CoA which arises from breakdown of carbohydrate, lipid, and protein. The actual Krebs cycle begins when acetyl –CoA enters into a reaction to form citric Acid. This cycle was discovered by British biochemist Sir Hans Krebs . For this he was awarded with Nobel Prize in 1953…..
Posted in Biology
Added on 04 April 2009
Langmuir Equation which depicted a relationship between the number of active sites of the surface undergoing adsorption and pressure ….
Posted in Chemistry
Added on 03 April 2009
Sir Hans Adolf Krebs was a German scientist who is famously known for discovering Citric Acid Cycle or Krebs cycle. Krebs father was an ear, nose, and throat specialist. This triggered his interested in research from childhood.
Krebs discovered the catalytic role of pyruvate and also established the central role of pyruvate in overall respiration or oxidation of glucose. The citric acid cycle for production of CO2 and energy….
Posted in Biology
Added on 31 March 2009
Freundlich gave an empirical expression representing the isothermal variation of Adsorption of a quantity of gas adsorbed by unit mass ….
Posted in Chemistry
Added on 30 March 2009
LASER is an abbreviated form of “Light Amplification by Stimulated Emission of Radiation”. It is an instrument which produces coherent and monochromatic light beam, which is uniform in nature and can be focused to very small and far off objects as well. Laser produces either pulsed or continuous output and has a number of applications in various fields.
There is an important phenomena related to LASER called ‘Population Inversion’ which has been described below….
Posted in Physics
Added on 28 March 2009
A quadratic function is of form y = ax² + bx + c where a ≠ 0 and a, b, c are real number. Graph of quadratic functions are always a parabola either opening upwards or downwards.
To plot graph of any quadratic function, we need answers of these question
What is sign of ‘a’ or coefficient of x2 in quadratic function?
Whether the graph of quadratic function intersects with x-axis? And if it does at what point does it intersect?
Posted in Mathematics
Added on 27 March 2009
The two point sources or two spectral lines of equal intensity are just resolved by a optical instrument when the central maximum of the diffraction pattern due to one falls on the first minimum of the diffraction pattern of the other.
A a parallel beam of light of wavelength λ and λ + dλ be incident, normally on a plane transmission grating element (a + b) and total number of rulings ‘N’. Let the diffracted beam be received by the telescope objective L. the total width is N (a + b) and total aperture of telescope objective is….
Posted in Physics
Added on 27 March 2009
Let z = (a + i b) be any complex number. The nth root of complex number z is given by z1/n where n → θ (i.e. set of rational numbers).
Convert the given complex number, into polar form.
Add 2kπ to the argument of the complex number converted into polar form.
Raise index 1/n to the power of z to calculate the nth root of complex number.
Posted in Mathematics
