Tuesday, 4 March 2014

The Millikan Oil Drop Experiment

Posted by F.Sc and ETEA Preparation Team on 01:01
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The Millikan Oil Drop Experiment An experiment performed by Robert Millikan in 1909 determined the size of the charge on an electron. He also determined that there was a smallest 'unit' charge, or that charge is 'quantized'. He received the Nobel Prize for his work. We're going to explain that experiment here, and show how Millikan was able to determine the size of a charge...

Tuesday, 11 February 2014

Capacitor

Posted by F.Sc and ETEA Preparation Team on 21:44
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CAPACITOR         Capacitor is an electronic device, which is used to store electric charge or electrical energy. A capacitor     stores electric charge on its plates. There are a number of types of capacitors available. STRUCTURE OF CAPACITOR       A capacitor consists of two identical conducting...

Mendel's Law of Independent Assortment

Posted by F.Sc and ETEA Preparation Team on 21:42
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Mendel's Law of Independent Assortment To this point we have followed the expression of only one gene. Mendel also performed crosses in which he followed the segregation of two genes. These experiments formed the basis of his discovery of his second law, the law of independent assortment. First, a few terms are presented. Dihybrid cross - a cross between two parents...

Development Of Chick

Posted by F.Sc and ETEA Preparation Team on 21:37
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Stages in chick embryo development One of the greatest miracles of nature is the transformation of the egg into the chick. A chick emerges after a brief three weeks of incubation. The complexity of the development cannot be understood without training in embryology. When the egg is laid, some embryonic development has occurred and usually stops until proper...

Dominance

Posted by F.Sc and ETEA Preparation Team on 21:37
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One of Gregor Mendel's great discoveries was the Principle of Dominance. He noted that when he hybridized two parents with different versions of a particular trait, one of those versions apparently disappeared in the hybrid (heterozygous) offspring. If he then mated those offspring to each other, the vanished trait reappeared in the third generation, apparently completely...

Kreb's Cycle

Posted by F.Sc and ETEA Preparation Team on 21:34
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Organisms derive the majority of their energy from the Kreb's Cycle, also known as the TCA cycle. The Kreb's Cycle is an aerobic process consisting of eight definite steps. In order to enter the Kreb's Cycle pyruvate must first be converted into Acetyl-CoA by pyruvate dehydrogenase complex found in the mitochondria. Introduction In the presence of oxygen organisms...

Protien Synthesis

Posted by F.Sc and ETEA Preparation Team on 21:33
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As with any of the polymerization reactions, protein synthesis can be divided into three phases: Initiation where a functionally competent ribosome is assembled in the correct place on an mRNA ready to commence protein synthesis. Elongation whereby the correct amino acid is brought to the ribosome, is joined to the nascent polypeptide chain, and the entire assembly moves...

Electron Transport Chain

Posted by F.Sc and ETEA Preparation Team on 21:31
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The electron transport chain (aka ETC) is a process in which the NADH and [FADH2] produced during glycolysis, β-oxidation, and other catabolic processes are oxidized thus releasing energy in the form of ATP. The mechanism by which ATP is formed in the ETC is called chemiosmotic phosphorolation. Introduction The byproducts of most catabolic processes are NADH...

Naming Coordination Compounds

Posted by F.Sc and ETEA Preparation Team on 21:29
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A complex is a substance in which a metal atom or ion is associated with a group of neutral molecules or anions called ligands. Coordination compounds are neutral substances (i.e. uncharged) in which at least one ion is present as a complex. You will learn more about coordination compounds in the lab lectures of experiment 4 in this course. The...

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