October 16, 2009

Bio experiment

First day

Objektif:To identify how does the temperature affect the rate of enzyme activity.

contanst variable: same amount of starch and amylase and iodine as well
manipulated : the temperature of water bath(0, 20, 37, 50,65 degree celcius)
responding : the presence of starch

Discussion : when starch is present,iodine will change from yellowish to blue.
- iodine will remain yellow when starch is dehydrolysis.(ie when amylase is digest stach ady)
- iodine will change to blue when amylase is denatured

Hypothesis: 1. at o .c , the enzyme is present,but it can't digest starch,hence u will get all the way blue colour when starch and amylase are mixing together .

2. at 20.c, the mixing solution(amylase and starch)
will change to yellow gradually after some time(approximately 20th minutes)

3. at 37.c , the mixing solution will immediately change to yellow.(our experiment show the positive result after 2 minutes),this is because 37.c is the optimum temperature for amylase activity)

4. at 50.c,the mixing solution will become yellow,then blue after approximately 37 minutes,this showing amylase is denatured.

5. at 60.c,the enzyme amylase denatured immediately,you will get blue colour all the way.

apparatus: the grey one is starch,the brown one is amlylase and it was smell unpleasant.Iodine to detect the presence of the starch.
this is the ambience at the iniation of the experiment.

.preparing for 50 and 65.c water bath.
han sian: what r u laughing at?
blur,but they were all becoming serious ady
i found out that students of sis 1 is quite spontaneous is using the appartus. gals group just realise that we should use the clicker after saw boys do so.From left to right: jia wei,han sian,zhe kang

either 50 or 65

detecting starch.
shu yan and susan
i took from car park de.i wanna rush to home le.

Second day
dropping amylase to starch.
jia wei: what should i measure?
susan: shh~~.....
jia wei wan to kao lui while doing experiment,hahaha.

me,have to test the presence of starch every interval one minute.
mixing the solution together after stabilise their temperature in water bath for 5 minutes.

group 50 and 37 .c
han sian: what r u doing r?
yih kang: watch and see(we are science student,we should be curious about this)

the result of 20.c
50.c de
the one and only malay student in our class,she is quite pity coz we always speaking chinese.
it is hard to get shu yuan photo,u know?

jia wei: 大功告成

cute pic taken .u guys know where is it ady,right?

well,quite a long didn't update my blog ady.

in fact,i am quite indolent to do so too,hehe.prefer to go facebook now.
coz you can receive more responds there.

however,there are still something that i will not post on facebook.
actually,there is nothing special event happened recently.i have create a new quiz,"how well did you know about Shuh Hong?" at facebook,


you can go here for the test.
October 15, 2009


something happened to me today,my wallet was stolen.

but can't the thief only stole the cash, what for he/she stole my ic,driving licence too?
the bastard thief made me wan to renew my ic that costing Rm 50 ar!

the sequence of the affair was like this
1. today is thursday,got 5 vacant period,tat mean we can't chat for 5 period.the vacant 5 period is after the recess.and then at the second and thrid period,it was Biology,hence,we went to laboratory and later computer lab.we came out form the cc about 10.30am.

2. when wan ching reached the class,she found out her wallet was dissapeared,then i checked mine,both our wallet were dissapeared.For your extra information,today the PMR alummi also gatehered at Dewan which located near our class.thus,they were sceptical.Confirm that the object was dissapear.in the progress, Lin Wei also told me not to keep wallet in the bag,and then dun noe who added that wallet should be follow you everywhere you go(钱包是贴身的),well,i learnt a lesson ady.I will never nver never put my wallet or cash else where,but make it follow the owner.

3. Zi kang , Qi qian and dun noe who else suggested us to report and ask them to sport check.

4.Get the handphones to keep in car first,so that when sport check,our handphone won't be rampas.

5. Go Bilik disipline to find teacher, (the others continue to searching for us,they found at ditch,rubbish dumper,every corner of the sceptical scene,the grass as well, i felt ...wah,what a friend,a friend in need is a friend indeed.quite touch to see the scenery,thats the reason i still afford to put on smile although my cash worth Rm50++,and other important document are dissapeared.)

6.Based on the experience of teacher,they could conclude that the wallets won't be founded although sport check was conducted.But we instill to carry out ,so they conduct sport check to our block only.they also give us some advice,i still remember that one of the teacher sat that" kalau kamu nak bagi duit pencuri,susah kalau dia tidak melakukan penjenayah"i e 有钱不偷会很对不起自己"

7. Go to car to get handphone and ring the bank to block the car and wc inform her friend and father and mother as well.

8. Sport check.And then the guru pengawas ask us some question like