Prempt the Questions Thread (2 Viewers)

[adnan91]

I love biopol!! I love haber I love esters ethanol alternative fuel thingo i swear i've done it atleast 15 times anyway I love chemistry as a whole i want a 90+ raw mark

 

[JasonNg1025]

Re: 回复: Re: 回复: Re: 回复: Re: 回复: Re: Prempt the Questions Thread

Mmm, probably a polyhydroxyalkanoate, but is the polyhydroxybutanoate part of the polyhydroxyalkanoate group?

Cause I'm too used to writing Biopol as a PHB, so not sure if I am wrong

 

[adnan91]

PHA is biopol and produced by bacteria as tom said^^

 

[Shadose]

lol, The love you guys have for chemistry motivates me B-)

 

[crammy90]

how exactly do bacteria produce it
do the alcaligenes eutrophus act on sugars?
or is on plant material :S

 

[henry08]

On Molasses and waste products, so probably sugar and plant material.

I hate esters. I love karina.

 

[SkimDawg]

Yeah a question about esters sounds likely. I reckon:
- What steps are taken to purify and sanitise water (hasn't been something like this since hsc 2002)
- An Ethanol renewable resource question with a twist
- Haber process and its significance in world history
- A battery that you have studied
- A synthetic bio polymer (please no!)
- A neutralisation substance question (seems to be common these days)
- For shipwrecks, a 7 marker about how electrolysis has blah blah.... , as well as some first hand investigation about the rate of rusting in different conditions or acids, ect.

It wouldnt suprise me if none of this is in the paper lol

 

[samwell]

I hope we have the identification of ions prac. I luved that prac and esp the flame test bcoz i ignored one safety precaution and almost burnt my eye when heating a lead salt. lol

 

[crammy90]

Jason NG did mathematics EX 1/2 last year when he was in yr 9 :S
thats insane lol

 

[henry08]

I would like a q on the historical context of the Haber process. Not so keen on identifying ions.

 

[axlenatore]

Re: 回复: Re: 回复: Re: 回复: Re: 回复: Re: Prempt the Questions Thread

Pretty sure Biopol is PHA. Poly-hydroxyalkanoate produced by the bacteria alkaligene eutrophus.

Once source i have says alkaligene eutrophus makes PHB

 

[tommykins]

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Once source i have says alkaligene eutrophus makes PHB

probably both? lol

 

[nandayo]

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probably both? lol

As far as I know Biopol consists of PHB (polyhyroxybutyrate) and PHV (polyhydroxyvalerate) because valeric acid is added in the process and pretty sure PHV is produced as a natural defence mechanism by the Alcaligenes Eutrophus.

You can't say it produces 'PHA'...PHAs are polyhyroxyalkanoates - that's a generic term and kind of avoids stating what it actually produces. Like saying the dehydration of ethanol produces an alkene.

 

[tommykins]

Re: 回复: Re: 回复: Re: 回复: Re: 回复: Re: Prempt the Questions Thread

As far as I know Biopol consists of PHB (polyhyroxybutyrate) and PHV (polyhydroxyvalerate) because valeric acid is added in the process and pretty sure PHV is produced as a natural defence mechanism by the Alcaligenes Eutrophus.

You can't say it produces 'PHA'...PHAs are polyhyroxyalkanoates - that's a generic term and kind of avoids stating what it actually produces. Like saying the dehydration of ethanol produces an alkene.

thanks for t hat.

 

[henry08]

Re: 回复: Re: 回复: Re: 回复: Re: 回复: Re: Prempt the Questions Thread

Once source i have says alkaligene eutrophus makes PHB

That is what I thought.

 

[crammy90]

ive got poly-3-hydroxybutanoate
i referenced it somewhere to confirm ages ago when i wrote it
i read about pha whats the diff with pha and phb
what are the alcali defending themselves from lol

 

[syriangabsta]

Defeniately Haber pRocess. All my teachers have said it would come too, hasnt been in for a while.

 

[jessi90]

no battery questions please!

 

[tommykins]

ive got poly-3-hydroxybutanoate
i referenced it somewhere to confirm ages ago when i wrote it
i read about pha whats the diff with pha and phb
what are the alcali defending themselves from lol

Polyhydroxybutyrate (PHB) is a polyhydroxyalkanoate (PHA), a polymer belonging to the polyesters class that was first isolated and characterized in 1925 by French microbiologist Maurice Lemoigne. PHB is produced by micro-organisms (like Alcaligenes eutrophus or Bacillus megaterium) apparently in response to conditions of physiological stress.


wikipedia

 

[henry08]

I too would rather not have a battery question.