1. The Effect of Light and Dye Composition on the Color of Dyeings with Indigo 6-Bromoindigo 6,6'-Dibromoindigo Components of Tyrian Purple
Add full list of co-authors, according to the abstract you submitted.
Add Department of Natural Sciences, Baruch College/CUNY and date of presentation.
Aygul Islamova, John Scalise, Derrick Claye, Ioannis Karapanagiotis, Christopher Cooksey, Sasan Karimi and Keith Ramig
Department of Natural Sciences
Baruch College of the City University of New York
Presented By: Aygul Islamova, John Scalise
May 9th, 2015

2. Give all interesting history factoids

3. The date of the reference should be 2013—other slides need this change too. Are these your notes, or left over from another presentation? The notes you have here are for the previous research. If you give them as written here, it will sound like you studied the carbon nanotubes, etc. You should tell about the previous research, but make sure the audience knows who did it. Also, you might want to give some pictures showing the thermochromic effects of mbi and dbi, just for background.
The purpose of the research is to compare the dyeing properties of indigo, MBI, and DBI to find an explanation for the thermochromic effect (color change upon heating). We have found that wool, along with many other fabrics, dyed with indigo or MBI turns blue upon heating in water, while DBI-dyed wool turns red upon heating in water. We have studied the dyed fabrics by reflectance and colorimetric analyses. Also, we have employed dyed carbon nanotubes as a novel surrogate for dyed fabrics, and studied their particle-size distribution by electron microscopy
Source: O. Lavinda et al./ Dyes and Pigments 96 (2013)

4. “Leuco” Formation
I think we agreed to leave out discussion of the dianion vs. monoanion vs. protonated form. Just show and refer to dianion throughout.
Stress here that it was always assumed the UV light in sunlight caused the debromination, but no systematic study has been done, other than that Japanese study which was inconclusive.
Show picture of leuco form in vat, and what the result of light exposure is (reddening of leuco solution).
Source: O. Lavinda et al./ Dyes and Pigments 96 (2013)

5. Leuco: standard condition

6. Colorimetry CIELAB Color Space
Lightness: L* _L*  
Hue: a* -(a*) b* -(b*)
Color Difference:
Euclidean Distance ΔEab*
Conclude this slide with what we estimate the barely perceptible delta E to be. Around 4-6?

7. You might want to put those square color pieces from slide 3 at the top of each pair of bars.

8. Standardizing Dyeing Conditions
MBI wool
pass
avg
s.d.
s.d. % L*
34.2
2.8 8
1st a*
21.4
0.9 4 b*
25.4
0.2 1
41.4
0.4
2nd
17.5 6
27.2
0.3

10. ΔEab* for Standard vs. FLU, INC
FLU ΔE 10.4
INC ΔE 21.6

11. Future Research Goals HPLC analysis in studying debromination
Mixture indigoid dyeings: equimolar IND:MBI, MBI:DBI
Study whether there is a difference in affinity for the fabric between indigoids
To determine the ratio of indigoids in the dyeing vat VS. on the fabric using CIELAB data and HPLC analysis
First bullet: HPLC study will tell if bluing with light exposure is only a correlation, or if it’s cause and effect. We suspect bluing is cause by presence of indigo, but need to independently confirm.
2nd bullet: Show picture of the “best 15”. Mention that dye from the snails can be mixtures of two or even three of the indigoids. That’s why we’re interested in mixture dyeings.

12. Equimolar Indigoid Mixture Dyeing
DBI
DBI:MBI
MBI
MBI:IND
IND
1st Pass
2nd Pass

13. Acknowledgements Mentor: Dr. Keith Ramig Collaborators:
Baruch College: Derrick Claye
Queensborough Community College: Sasan Karimi
University Ecclesiastical Academy of Thessaloniki, Thessaloniki Greece: Ioannis Karapanagiotis
Watford, Hertfordshire England: Christopher Cooksey
Can take out Pozzi, Shah and Massa. Thank Dr. Karimi for supplying the DBI. Mention the Greek guy will do HPLC.

14. Thank You

15. Thank You Baruch Department of Natural Sciences BIOMED Dr. Szalda
All Faculty
Dr. Greer
Dr. Ramig
Sonia
Dr. Gernert
Dr. Schawaroch
Dr. Kulatilleke
Niel
Dr. Butler
Dr. Catto
Dr. Barbour
Put a group picture in here? We can take a selfie of us in lab coats and goggles tomorrow, and Aya you can wear your dyed scarf if you like.
Dr. Wahlert
Dr. Bourkoff