Pirika logo
JAVA, HTML5 & Chemistry Site

Top page of Pirika

 Properties Estimation
 Polymer Science
 Chemical Engineering
 Molecular Orbital
 Other Chemistry
 DIY:Do It Yourself

Hansen Solubility Parameter (HSP)
  Basic HSP
  Bio, Medical, Cosmetic
  Properties Estimation
  Analytical Chemistry
  Formulating for Cosmetics
  DIY:Do It Yourself

Other Writing

Ad Space for you


Ad Space for you





Last Update

Chemistry@Pirika: Chemo-Informatics

Japanese page

I developed a lot of Chemo-Informatics tools such as Neural Network systems, Genetic Algorithm programs and SOM programs. I will introduce my tools here. Actually there are so many systems that developed by mathematician or statistician. But such system is not adequate for chemistry. Pirika aim to develop "Of the Chemist, By the Chemist, For the Chemist" Chemo-Informatics tools.

How Neural Network learn Boiling Point of Compounds?

The problems in NN learning

DataBase Uncertainty destroy Neural Network

DataBase Problems

Pattern recognition by neural network

SOM(self organization map)


NN Examples:

Design of Azo-benzene: 99.3.24

For example, if you want to design red color Azo-Benzene dye, how can you do that?

There are 10 possible substitute positions and you can substitute NH2,OH,NO2,CN,SMe so on(maybe more than 10). Calculate 1010 possible structure with MO method? And pick out only red Azo-Benzene? it take 1000 years !

Design of Glass: 99.3.24

In case of Design of Glass, there are so many possibilities of each component ratio. If you try to melt 10 kind of oxide in 0.1% notch, it exist (103 )9 composition.

Only you have to do is input mol% of oxides, then you can get properties in a second. Glass transition Temperature, Young Modulus, density Refractive Index, Abbe's Number and Coefficient of Thermal Expansion.

If you can calculate glass properties in a second, it takes 1027 second calculate all 10 kind of oxide in 0.1% notch composition. 1 year exist only 3.1536*107 second, so you need 1020 years to evaluate all. If the target glass properties are already determined, please try my Java applet. you are designing High young modulus glass, then input desire Young Modulus, Coefficient of Thermal Expansion, density and Glass transition Temperature then push start button. you will get new glass composition. If you want to develop patent free new composition of lead glass, which is 10% lighter than your competitor but same Tg, TEC, YM, then please try my applet.
For this problem ChemoInformatics works very well.



Mail will be created with your default mailer

Mail Address

Please send mail via your mailer