Porphyrin

Electricity in both everyday electronic devices and in the human Central Nervous System is created through the flow of charged particles. However, in electric circuits, charge is carried by moving electrons through a conductive wire, whereas in the brain, impulses are carried by ions, or charged molecules. Electrical signals in the brain mainly take place in neurons, which are nerve cells that specialize in transferring nerve impulses. Changes in the concentration of ions in a neuron cause changes

Abstract The citric acid cycle (CAC), also known as the Krebs cycle and the tricarboxylic acid cycle, is a stage of cellular respiration. The role of the cycle is to oxidise fuel molecules and to provide precursors in the form of carbon skeletons for other metabolic pathways (e.g. fatty acid synthesis, amino acid synthesis etc.). The CAC is described as amphibolic, as it has both catabolic and anabolic functions. Catabolism is the breaking down of substances to provide chemically available energy

Myoglobin consist of single polypeptide chain that made up of 153 amino acid and ahs a size of 18 kDa. Its three-dimensional structure was first determined by X-ray crystallography by John Kendrew in 1957. Myoglobin is a typical globular protein in that it is a highly folded compact structure with most of the hydrophobic amino acid residues buried in the interior and many of the polar residues on the surface. X-ray crystallography revealed that the single polypeptide chain of myoglobin consist of

Metallobiomolecules METALLOBIOMOLECULES CONTENTS 1. Introduction Metallobiomolecules 2. Classification Metallobiomolecules 2.1. Transport and of to Storage Proteins 2.2. Oxygen binding Today scientists try to explore the chemistry basis behind the biological processes. As a result of this, new areas have evolved such as bioinorganic chemistry and bioorganic chemistry. In this section we will talk about an important concept in bioinorganic chemistry called “Metallobiomolecules”. Metallobiomolecules

Cooperativity of the heamoglobin molecule can be explained as: In the tense structure, it becomes less accessible for oxygen to bind to the iron ion because it is removed from the plane of the porphyrin ring. In the relaxed structure the iron ion is accessible to oxygen binding as it remains in the porphyrin ring. When oxygen binds to the tense structure in the lungs (a high oxygen pressure environment), it causes the rotation between the two dimers causing the remaining iron atoms to shift resulting

Scott Weidensaul is an internationally known ornithologist, meaning he knows quite a lot about birds (in particular - owls). He has not only been the author of many books but the writer for sources such as the Philadelphia Inquirer and Smithsonian Magazine. Weidensaul has also directed several research efforts and has even been nominated for the Pulitzer prize. He spoke at an Audubon Event held here at Lyco in November. I originally went to the event as extra credit for a biology class but ended

Porphyrins are one of the special bacteria fighting agents that are released due to the stimulation of the clearlight treatment using a high intensity blue-violet light. With the release of these porphyrins, a chemical reaction with in the skin occurs and this allows the pophyrins to produce peroxide that is effective in neutralizing the acne causing bacteria

Polymer Coatings with radiation detection functionality. Mritunjay Sharma Zhuo Yang Supervised by Professor Steve Yeates & Prof. Francis Livens 1. Introduction Nuclear conversion of an atomic nucleus from one form to another is known as radioactivity. These conversions are accompanied by nuclear radiations, major nuclear radiations are alpha, beta and gamma radiations these are ionisations radiations and hence are dangerous to living beings these radiations

Cobalt(II) Oxygen adduct complex Inorganic 461 lab 2-29-2012 Abstract This experiment uses Co(salen) as a model compound illustrating the uptake of oxygen in hemoglobin. SalenH2 was prepared as the intermediate, and reacted with hydrated cobalt to prepare Co(salen). Using Co(salen) the oxygen up-take was tested. The synthesis of SalenH2 produced 0.65 g. The percent yield of salenH2 was 116% on the filter paper and 105% after transferring salenH2 to a vial. The melting point of salenH2, was

Throughout life parents have told their children stories sometimes for them to go to sleep and sometimes just to scare them. Some parents have told their kids legends and folklores so vividly that the kids started to believe the stories, and later thing they are true. One of the most famous folklores that had gotten more attention in recent years are vampires. Vampires have changed from scary monster to attractive dead people because of how the media portrays them now a day. Some people are fascinated