Final day of study/ morning quiz

Question 1

Dye affinity to substrate and medium?

Answer 1

High affinity, higher affinity to substrate than median

Question 2

How does conjugation effect colour?

Answer 2

the more conjugated a compound is the longer wavelength of light the compound absorbs. Higher conjugated compounds light reflected is more likely to be in the visible range

Question 3

Which of the commonly used inorganic pigments is coloured blue due to charge transfer transitions between two metals in different oxidation states?

Answer 3

Prussian blue

Question 4

Metal coordination helps to improve light stability by..

Answer 4

reducing electron density at

the azo functional group

Question 5

describe the similarities between smell and visual perception?

Answer 5

Both involve GPCR proteins housed in the membranes of nerve (neuron) cells

Question 6

why does smell trigger an emotional response?

Answer 6

signals get sent 2 directions after the olfactory bulb. One pathway is via the thalamus to olfactory cortex for conscious perceptions of odour. the other direction is directly to parts of the limbic system at the centre of the brain responsible for emotion and memory response. The close link *not via the thalamus is why the emotional response is so fast and strong

Question 7

Smell of voilets

Answer 7

some molecules deactivate GPCR while others activate. Different to olfactory. fatigue

Question 8

define mircoheterogeneous

Answer 8

not homogenous and small particle size

Question 9

2 reasons you might use aroma analysis.

Answer 9

sensory analysis, market research