Study of stereospecificity in mushroom tyrosinase and the inhibiting effects of thiourea‚ cinnamic acid and benzoic acid BIOL/BIOC 393 L03 Dr. Judit Moldovan Submitted: Nov. 22nd‚ 2010 By: Jackie Minnick (Partners Amanda Verwoerd & Kersti Ojamaa) Study of stereospecificity in mushroom tyrosinase and the inhibiting effects of thiourea‚ cinnamic acid and benzoic acid. Jackie Minnick This paper reports experiments on the stereospecificity observed in the monophenolase and diphenolase activities
Premium Enzyme inhibitor Enzyme
Guava is a small tropical tree that grows up to 35 feet tall; it is widely grown for its fruit in tropics. It is a member of the Myrtaceae family‚ with about 133 genera and more than 3‚800 species. The leaves and bark of P. guajava tree have a long history of medicinal uses that are still employed today (Nwinyi et al.‚ 2008). In the view of the immense medicinal importance of P. guajava plant evidenced in the various studies mentioned above and also corroborated in a recent review article by Kamath
Premium Fruit Forest Rainforest
organism resulted in a purple medium resulting in a positive test. The indole production test is tested after incubation of the tube. To get the results‚ Kovac’s reagent must be added to the tube. Kovac’s reagent has the indicator p-dimethylamino-benzaldehyde which will produce a red ring on the surface of the agar resulting in a positive test. After incubation‚ I added Kovac’s reagent into the MIO tube which did not result in a color change‚ indicating a negative result for indole
Premium Bacteria Microbiology Gram staining
What is the Difference between Flammable and Combustible Liquids? Put simply‚ flammable and combustible liquids are liquids that can burn. The real difference lies within their flash point range‚ or lowest temperature at which vapours of the material will ignite when supplied with an ignition source. Flammable and combustible liquids are utilised in most workplaces‚ from manufacturing to retail and service entities. To ensure the safety of property‚ people‚ and the environment‚ both flammable
Premium Ethanol Ethanol Gas
an iron center .a proximal histidine group was attached directly to the iron center‚ and a distal histidine group on the opposite face‚ not bonded to the iron. In hemeoglobin‚ an iron held in a porphyrin ring. The porphyrin ring consists of four pyrrole molecules cyclically linked together‚ by methene bridges‚ with the iron ion bound in the center.[2] The iron ion‚ which was the site of oxygen binding‚ coordinates with the four nitrogens in the center of the ring‚ which all lie in one plane. The
Premium Hemoglobin Oxygen Iron
characterized by redness‚ watering‚ and itching. Potential Chronic Health Effects: Very hazardous in case of eye contact (irritant). Hazardous in case of skin contact (irritant). Slightly hazardous in case of ingestion‚ of inhalation Benzaldehyde Flammability of the Product: Combustible. Auto-Ignition Temperature: 192°C (377.6°F) Flash Points: CLOSED CUP: 64.4°C (147.9°F). OPEN CUP: 73.9°C (165°F). Flammable Limits: LOWER: 1.4% Products of Combustion: These products are carbon
Premium Vapor pressure Temperature Water
II PUC – CHEMISTRY (34) MODEL QUESTION PAPER - 1 Time: 3hours 15 minutes Maximum marks: 70 Instructions: 1. The question paper has four parts: A‚ B‚ C and D. All parts are compulsory. 2. Write balanced chemical equations and draw labeled diagrams wherever required. 3. Use log tables and the simple calculator if necessary. (Use of scientific calculators is not allowed) PART-A I. Answer ALL of the following. (Each question carries 1 mark) 10x1=10 (Answer each question in one word or
Free Chemical reaction Chlorine Alcohol
1. (a)Correct the following statements. (i) The melting points of crystalline and amorphous solids are not definite. The melting point of an amorphous solid is not definite. OR The melting point of a crystalline solid is definite. P Ps X solute . Ps P Ps The equation for relative lowering of vapour pressure when solute remains normal is X solute P (iii)The degree of ionization decreases with dilution. The degree of ionisation increases with dilution. (iv) Tertiary butyl halide
Premium Ammonia Hydrogen Chlorine
-APPLICATION OF ENZYMES IN ORGANIC CHEMISTRY Why enzymes in organic synthesis? | Alternative to chemical methods: * High region- and stereoselectivity * Milder reaction conditions * Environmentally more friendly | Which enzyme(s)? | OxidoreductasesHydrolasesLyasesIsomerases | Which reaction system? | AqueousAqueous and water-miscible organic solventAqueous and water-immiscible organic solventPure organic solventOther solvents (supercritical fluids‚ ionic liquids) | Which ‘chemistry’
Premium Enzyme Amino acid Organic chemistry
The Love Canal Tragedy— a historical event which had an immense impact on the lives of those involved‚ as well as the laws and regulations set by the Environmental Protection Agency (EPA). It began as a plan by entrepreneur William T. Love to construct a canal that could act as a water source and conduct power using hydroelectricity‚ but rather served as a connector between Lake Ontario and the Niagara River. While his proposal sounded as though it would be a success‚ all construction came to a halt
Premium New York Waste