GMU:DIY Biolab “Driver’s License”/Yang Li: Difference between revisions

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[[File:12.6 bio-lab first idea.001.jpeg|400px]]
== Object is talking ==


[[File:12.6 bio-lab first idea.002.jpeg|400px]]
===1. Introduction===
1.1 anthocyanin
Anthocyanins are water-soluble vacuolar pigments. In the 1664 book Experiments and Considerations Touching Colours by chemist Robert Boyle, various edible plants are reported as visual pH indicators due to pH-responsive mechanisms in their tissues [1]. Anthocyanin is a kind of natural colorant in food and beverage industry, and has been found to possess anti-inflammatory antioxidant properties [2]. It has also been researched for use as an indicator for packaging applications to detect spoilage in pork and fish products [3]. All tissues of vascular plants contain the flavonoid anthocyanin, a pigment that changes colour under varying pH solutions.
Under different pH conditions, the hydroxyl (OH) and/or methyl ether (O-CH3) groups attached to the carbon rings (figure 1) undergo reversible structural transformations and ionizations. Restructuring a molecule changes the way it ab- sorbs light, giving rise to colour changes [4].


[[File:12.6 bio-lab first idea.003.jpeg|400px]]
[[File:Screen Shot 2018-01-31 at 12.08.56.png|800px]]


[[File:12.6 bio-lab first idea.004.jpeg|400px]]
Chemical diagram of colour-changing anthocyanin pH reaction [5]


[[File:12.6 bio-lab first idea.005.jpeg|400px]]
1.2 red cabbage
"Red cabbage is rich in a number of bioactive substances, including anthocycanins"[Wiczkowski, 2012]. The method of extracting anthocyanin from red cabbage is easy and convenient.


[[File:12.6 bio-lab first idea.006.jpeg|400px]]
===2. Idea===
This work is based on a research done by MIT media lab that uses organic fluid-based molecules. The molecules anthocyanin, vanillin, chitosan are used as dopants that can sense different pH values. The output is in the form of a broad spectrum of colors, odors and shapes. Based on this, the experiment focus on color changing, using kappa-carrageenan as substrate to present the reaction in a certain form. The outcome shows chemical reactions that are in daily life unreadable and unseen. What is shown here is a new design language to create new appliances. In the exhibition, color changing can be seen both in liquid and solid statues.
===3. Method===
<gallery caption="Color Changing in liquid status">
File:4931517416494_.pic_hd.jpg|Making red cabbage indicator
File:Screen Shot 2018-01-31 at 15.12.21.png|Making pH solutions
</gallery>
<gallery caption="Color Changing in solid status">
File:屏幕快照 2018-03-31 下午1.40.34.png|1.5%w/v kappa-carrageenan in deionized water 
File:屏幕快照 2018-03-31 下午1.41.12.png|pour anthocyanin solution
File:屏幕快照 2018-03-31 下午1.41.26.png|make a color film
File:屏幕快照 2018-03-31 下午1.41.39.png|dry the color film
File:屏幕快照 2018-03-31 下午1.42.22.png|color changing
File:屏幕快照 2018-03-31 下午1.42.02.png|color changing
</gallery>
<gallery caption="Shape Changing">
File:2018-03-31 下午1.42.36.png|4% w/v chitosan powder
File:屏幕快照 2018-03-31 下午3.21.01.png|3% v/v acetic acid 
File:屏幕快照 2018-03-31 下午1.42.48.png|pour chitisan solution
File:屏幕快照 2018-03-31 下午1.43.01.png|make a shape film
File:屏幕快照 2018-03-31 下午1.43.20.png|dry the shape film
File:屏幕快照 2018-03-31 下午1.43.34.png|0.75 uL droplets of the pH solution drop on the shape film
File:屏幕快照 2018-03-31 下午1.43.45.png|pH2 and pH12 shape changing
</gallery>
{{#evt:service=vimeo|id=262637645}}
<br/>


[[File:12.6 bio-lab first idea.007.jpeg|400px]]
===References===
#[1] Robert Boyle. 1664. Experiments and Considerations Touching Colours. Project Gutenberg. 1–157 pages.
#[2] Jian He and M Monica Giusti. 2010. Anthocyanins: Natural Colorants with Health-Promoting Properties.
#[3] Xiahong Zhang, Sisi Lu, and Xi Chen. 2014. A visual pH sensing film using natural dyes from Bauhinia blakeana Dunn. Sensors and Actuators B: Chemical 198 (2014), 268–273.
#[4] Viirj Kan. 2017. Organic Primitives: Synthesis and Design of pH-Reactive Materials using Molecular I/O for Sensing, Actuation, and Interaction. Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems Pages 989-1000.
#[5] UMass Amherst Department of Chemistry Lecture Demonstrations.
#[6] https://ellieirons.com/projects/two-meadows/


==References==
      [[:File:12.6 bio-lab first idea.pdf]]
* https://ellieirons.com/projects/two-meadows/
 
I use red cabbage to make pH indicator. The pH solution from 2 to 13.
[[File:WechatIMG440.jpeg|400px]]
 
1. pH=2 100ml distilled water + 1ml HCL
[[File:WechatIMG418.jpeg|400px]]
 
2. pH=4 100ml distilled water + 0.1g apple acid
[[File:WechatIMG438.jpeg|400px]]
 
3. pH=5.5 100ml distilled water + 2g H3BO3(Boric acid)
[[File:WechatIMG433.jpeg|400px]]
 
4. pH=7 100ml distilled water
[[File:WechatIMG429.jpeg|400px]]
 
5. pH=8 100ml distilled water + 0.5g NaHCO3
[[File:WechatIMG436.jpeg|400px]]
 
6. pH=11 700ml distilled water + 1ml NaOH
[[File:WechatIMG427.jpeg|400px]]
 
7. pH=12 250ml distilled water + 1ml NaOH
[[File:WechatIMG424.jpeg|400px]]
 
8. pH=13 100ml distilled water + 1ml NaOH
[[File:WechatIMG420.jpeg|400px]]
after 5 minutes change to yellow
[[File:WechatIMG430.jpeg|400px]]
 
 
Next step:
1. Rate of colour change
2. Reversibility of colour change

Latest revision as of 10:29, 5 April 2018

Object is talking

1. Introduction

1.1 anthocyanin Anthocyanins are water-soluble vacuolar pigments. In the 1664 book Experiments and Considerations Touching Colours by chemist Robert Boyle, various edible plants are reported as visual pH indicators due to pH-responsive mechanisms in their tissues [1]. Anthocyanin is a kind of natural colorant in food and beverage industry, and has been found to possess anti-inflammatory antioxidant properties [2]. It has also been researched for use as an indicator for packaging applications to detect spoilage in pork and fish products [3]. All tissues of vascular plants contain the flavonoid anthocyanin, a pigment that changes colour under varying pH solutions. Under different pH conditions, the hydroxyl (OH) and/or methyl ether (O-CH3) groups attached to the carbon rings (figure 1) undergo reversible structural transformations and ionizations. Restructuring a molecule changes the way it ab- sorbs light, giving rise to colour changes [4].

Screen Shot 2018-01-31 at 12.08.56.png

Chemical diagram of colour-changing anthocyanin pH reaction [5]

1.2 red cabbage "Red cabbage is rich in a number of bioactive substances, including anthocycanins"[Wiczkowski, 2012]. The method of extracting anthocyanin from red cabbage is easy and convenient.

2. Idea

This work is based on a research done by MIT media lab that uses organic fluid-based molecules. The molecules anthocyanin, vanillin, chitosan are used as dopants that can sense different pH values. The output is in the form of a broad spectrum of colors, odors and shapes. Based on this, the experiment focus on color changing, using kappa-carrageenan as substrate to present the reaction in a certain form. The outcome shows chemical reactions that are in daily life unreadable and unseen. What is shown here is a new design language to create new appliances. In the exhibition, color changing can be seen both in liquid and solid statues.

3. Method


References

  1. [1] Robert Boyle. 1664. Experiments and Considerations Touching Colours. Project Gutenberg. 1–157 pages.
  2. [2] Jian He and M Monica Giusti. 2010. Anthocyanins: Natural Colorants with Health-Promoting Properties.
  3. [3] Xiahong Zhang, Sisi Lu, and Xi Chen. 2014. A visual pH sensing film using natural dyes from Bauhinia blakeana Dunn. Sensors and Actuators B: Chemical 198 (2014), 268–273.
  4. [4] Viirj Kan. 2017. Organic Primitives: Synthesis and Design of pH-Reactive Materials using Molecular I/O for Sensing, Actuation, and Interaction. Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems Pages 989-1000.
  5. [5] UMass Amherst Department of Chemistry Lecture Demonstrations.
  6. [6] https://ellieirons.com/projects/two-meadows/
      File:12.6 bio-lab first idea.pdf