Great books from DBP Book sale

Have all of you been to the Dewan Bahasa and Pustaka Book Sale?
I went to the DBP book warehouse last saturday morning. Guess what i found? A book...an Encyclopedia of Chemistry. The actual price was RM250 each but because of the 90% discount, i bought it for RM25... Great !
So come on boys and girls from Maktab Sabah.. go to DBP book sale and buy great books of your choice with great price ...

Arenes

In early days of organic chemistry, the word aromatic was used to describe fragrant substances such as benzene( from coal distillate), benzaldehyde( from peaches, cherries and almonds), toluene ( from Tolu balsam).
Aromatic compounds show chemical behavior quite different from the alifatic compounds we have studied to this point.
Many compounds isolated from natural sources are aromatic in part. Steroidal hormone estrone and the well-known analgesic morphine have aromatic rings. Many synthetic drugs are also aromatic in part; the tranquilizer diazepam ( Valium) is an example.
Benzene should be handled cautiously if used as a laboratory solvent because it can cause bone marrow depression and consequent leukopenia( lowered white blood cell count) on prolonged exposure.

No more teaching form5 chemistry

To all my students out there...

This year 2010, I'm not teaching form 5 anymore. I only teach the form 6 level students... This time I'll be more focus on PRE U level of chemistry

But Hey ! anyone who still wants to contact me regarding the form 5 level of chemistry.. I'm still here to help all of you...