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 ...
Wednesday, October 20, 2010
Friday, August 13, 2010
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.
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.
Friday, February 26, 2010
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...
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...
Wednesday, November 18, 2009
CHEMISTRY QUIZ....
Congratulation to my students who sat for the Kuiz Kimia Kebangsaan 2009. All of you have done your best.
Especially to Nuramirah Syahirah Rizalman and Pg Iqhwan Ashraf Pg Mohd Kamil who achieved the highest score in this quiz.
Congrats!
Especially to Nuramirah Syahirah Rizalman and Pg Iqhwan Ashraf Pg Mohd Kamil who achieved the highest score in this quiz.
Congrats!
Antibiotics
The value of hardwork and logical thinking should not be underestimated. But pure luck also plays a role in most real scientific breakthroughs.
The supreme example of luck in all scientific hystory occurred in the late summer of 1928 when the Scottish bacteriologist Alexander Fleming went on vacation, leaving in his lab a culture plate recently inoculated with the bacterium Staphylococcus aureus.
While Fleming was away, an extraordinary chain of events occured.. First , a 9 day cold spell lowered the lab temperature to a point where the Staphylococcus on the plate could not grow. During this time, spores from a colony of the mold Penicillium notatum being grown on the floor below wafted up into Fleming's lab and landed in the culture plate.
The temperature then rose, and both Staphylococcus and Penicillium began to grow.
On returning from vacation, Fleming discarded the plate into a tray of antiseptic.
Evidently though the plate did not sink deeply enough into the antiseptic, because when Fleming happened to glance at it a few days later, what he saw changed the course of human history :
He noticed that the growing Penicillium mold appeared to dissolve the colonies of staphylococci .
Fleming realized that the Penicillium mold must producing a chemical that killed the Staphylococcus bacteria, and he spent several years trying to isolate the substance .
Finally in 1939, the Australian pathologist Howard Florey and the German refugee Ernst Chain managed to isolate the active substance , called penicillin.
By 1943, penicillin was being produced on a large scale for military use, and by 1944 it was being used on civilians. Fleming, Florey and Chain shared the 1945 Nobel Prize in medicine.
The supreme example of luck in all scientific hystory occurred in the late summer of 1928 when the Scottish bacteriologist Alexander Fleming went on vacation, leaving in his lab a culture plate recently inoculated with the bacterium Staphylococcus aureus.
While Fleming was away, an extraordinary chain of events occured.. First , a 9 day cold spell lowered the lab temperature to a point where the Staphylococcus on the plate could not grow. During this time, spores from a colony of the mold Penicillium notatum being grown on the floor below wafted up into Fleming's lab and landed in the culture plate.
The temperature then rose, and both Staphylococcus and Penicillium began to grow.
On returning from vacation, Fleming discarded the plate into a tray of antiseptic.
Evidently though the plate did not sink deeply enough into the antiseptic, because when Fleming happened to glance at it a few days later, what he saw changed the course of human history :
He noticed that the growing Penicillium mold appeared to dissolve the colonies of staphylococci .
Fleming realized that the Penicillium mold must producing a chemical that killed the Staphylococcus bacteria, and he spent several years trying to isolate the substance .
Finally in 1939, the Australian pathologist Howard Florey and the German refugee Ernst Chain managed to isolate the active substance , called penicillin.
By 1943, penicillin was being produced on a large scale for military use, and by 1944 it was being used on civilians. Fleming, Florey and Chain shared the 1945 Nobel Prize in medicine.
Wednesday, September 23, 2009
ITS A BOY !
And his name is Muhammad Khalid...
My baby was born on the 5th september, that is 15 Ramadhan 1430 Hijrah.
I delivered him in Likas Hospital and guess what ? I met my ex 5 Makmur student, Dr Alvin Oliver Paulus, having on call at that time.
Hopefully Sabah College can produce more doctors in the future...
I also want to wish Selamat Hari Raya Aidilfitri to all my muslim students.
Thank you Hairil for your emails. I will reply them soon.
My baby was born on the 5th september, that is 15 Ramadhan 1430 Hijrah.
I delivered him in Likas Hospital and guess what ? I met my ex 5 Makmur student, Dr Alvin Oliver Paulus, having on call at that time.
Hopefully Sabah College can produce more doctors in the future...
I also want to wish Selamat Hari Raya Aidilfitri to all my muslim students.
Thank you Hairil for your emails. I will reply them soon.
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