Working With A Decision Matrix ODOR LAB: EXPLAIN

THE CHEMISTRY OF SMELL What have you learned thus far about how humans smell? What have you learned thus far about the type of chemicals that produce smells (odor)? What have you learned thus far about the interpretation of odors? How is smell an important component of air quality?

ESTERS Alcohol + carboxylic acid = ester The name of the alcohol group comes first with –yl at the end. The name of the carboxilica acid group comes last with –oate at the end. Include fats and oils Includes Polar molecules found in flowers and fruits Propyl ethanoate Pentyl pentanoate Ethyl butanoate

ALDEHYDES AND KETONES Mostly fruity smelling Involved in perfumes C=O at the end of a chain (aldehyde) C=0 in the middle of a chain or ring (ketone) Vanillin Cinnamaldehyde Benzyaldehyde (almonds) Spearment oil 2 heptanone (from bleu cheese) Z-jasmone (jasmine) Progesterone and testosterone Aldyhyde Ketone

H 2 S gas has the smell of rotten eggs Bacteria break down organic compounds in the absence of oxygen and produce hydrogen sulfur gas as a result(component of proteins) Contain nitrogen Tend to have foul odors Fishy odors Basic pH Found in building blocks of protein Broken down to form urine AMINES AND SULFIDES AminesSulfides

THIOLS, INDOLES, PHENOLS Thiol (group of carbon atoms linked to a sulfur and hydrogen. The bond strongly to mercury and are often called mercaptans. They have a pungent odor. Ethyl mercaptan (thiol) is added to propane to give the gas a distinct smell Indoles- a benzene ring connected to a 5 carbon nitrogen ring. Ex. Tryptophan (found in meats), present in fecal material and has a fecal odor. In small amounts, it has a flowery smell. Phenols-a hydroxyl group bonded to an aromatic hydrocarbon ring.. Cannabis, chili peppers, and oregano

WHAT IS A DECISION MATRIX? A decision matrix is a systematic method used to select a solution from a set of possible solutions. Purpose: To choose the best solution based on established criteria as opposed to just picking your “favorite”.

HOW DO I MAKE A DECISION MATRIX? Brainstorm several solutions to a problem. Establish constraints (criteria) to evaluate solutions and rank the importance of each constraint giving the most important constraint the highest number. Assign each solution a multiplier and determine final matrix score for each solution

BRAINSTORMING SOLUTIONS At least three different solutions to a problem should be generated. Write the solutions across the top of the matrix. Solution 1Solution 2Solution 3

ESTABLISH CONSTRAINTS What are the important criteria that should be considered when choosing a solution? Once you have a list of the criteria, rank them in order of importance listing the most important criteria first on the matrix. Assign the ranking numbers to each of the criteria.

Solution 1Solution 2Solution 3 Most important criterion 444 Second most important criterion 333 Third most important criterion 222 Fourth most important criterion 111

ASSIGN EACH SOLUTION A MULTIPLIER WITH RESPECT TO EACH CRITERION

FINISH THE SCORES TO FIND FINAL SCORES FOR EACH SOLUTION Solution 1Solution 2Solution 3 Most important criterion 4 x 2 = 84 x 1 = 44 x 3 = 12 Second most important criterion 3 x 1 = 33 x 2 = 63 x 3 = 9 Third most important criterion 2 x 3 = 62 x 1 = 22 x 2 = 4 Fourth most important criterion 1 x 2 = 21 x 3 = 31 x 1 = Solution 3 wins!!