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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 354344 times)

Offline someone

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1740 on: May 23, 2010, 07:58:10 pm »
phagocytes r the ones that engulf and digest bacteria

lymphocytes r the one that create antibodies which will kill bacteria

am i right? thx
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Offline mdwael

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1741 on: May 23, 2010, 07:58:59 pm »
Quote from: someone on May 23, 2010, 07:58:10 pm
phagocytes r the ones that engulf and digest bacteria

lymphocytes r the one that create antibodies which will kill bacteria

am i right? thx

Yes, and HIV virus attacks the lymphocytes
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Offline mdwael

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1742 on: May 23, 2010, 08:00:37 pm »
whats the difference between insecticide, herbicide and pesticide?
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1743 on: May 23, 2010, 08:02:54 pm »
Quote from: mdwael on May 23, 2010, 08:00:37 pm
whats the difference between insecticide, herbicide and pesticide?

Pesticides kill pests and disesaes.  Herbicides kill weeds.  See previous post about systemic pesticides.
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1744 on: May 23, 2010, 08:04:05 pm »
Quote from: someone on May 23, 2010, 07:58:10 pm
phagocytes r the ones that engulf and digest bacteria

lymphocytes r the one that create antibodies which will kill bacteria

am i right? thx

Phagocytes use pseudopodia to engulf bacteria, and use enzymes to digest bacteria - a.k.a Phagocytosis.

Lymphocytes produce antibodies that kill bacteria in a variety of ways, including the agglutination of bacteria.
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Always willing to help!  8)
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Offline someone

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1745 on: May 23, 2010, 08:04:44 pm »
Quote from: Ivo on May 23, 2010, 08:02:54 pm
Pesticides kill pests and disesaes.  Herbicides kill weeds.  See previous post about systemic pesticides.

plus insecticides kills insects

this should means that insecticides are also pesticides
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1746 on: May 23, 2010, 08:05:09 pm »
Quote from: mdwael on May 23, 2010, 08:00:37 pm
whats the difference between insecticide, herbicide and pesticide?
well guys good luck for tom! This is it! Major Bio paper! N thanks for ALL ur help, ALL of u! Found this thread rlly helpful :) Goodnight (here in Dubai).....n try not to get nightmares about Bio ;)
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1747 on: May 23, 2010, 08:05:56 pm »
Quote from: someone on May 23, 2010, 08:04:44 pm
plus insecticides kills insects

this should means that insecticides are also pesticides

That's right!
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1748 on: May 23, 2010, 08:08:20 pm »
Quote from: someone on May 23, 2010, 08:04:44 pm
plus insecticides kills insects

this should means that insecticides are also pesticides

Selective weedkillers are synthetic auxins.  The auxins increase the growth of the affected weeds (uncontrolable growth).  The weeds cannot provide enough food from photosynthesis to maintain this rate of growth and soon die.
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Always willing to help!  8)
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Offline someone

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1749 on: May 23, 2010, 08:10:12 pm »
Quote from: Ivo on May 23, 2010, 08:08:20 pm
Selective weedkillers are synthetic auxins.  The auxins increase the growth of the affected weeds (uncontrolable growth).  The weeds cannot provide enough food from photosynthesis to maintain this rate of growth and soon die.

to increase food production, auxins r also used right? but is it controlled so that the growth wouldnt be uncontrolled such as what happens to the weeds?
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Offline Helium

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1750 on: May 23, 2010, 08:10:23 pm »
Quote from: Ivo on May 23, 2010, 08:08:20 pm
Selective weedkillers are synthetic auxins.  The auxins increase the growth of the affected weeds (uncontrolable growth).  The weeds cannot provide enough food from photosynthesis to maintain this rate of growth and soon die.
I was looking for this, Thanks ;)
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Offline CatAly$t

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1751 on: May 23, 2010, 08:14:13 pm »
can somebody tell me about penicillin fermentation???
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Offline someone

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1752 on: May 23, 2010, 08:17:38 pm »
Quote from: CatAly$t on May 23, 2010, 08:14:13 pm
can somebody tell me about penicillin fermentation???

-fungus penicillium are put inside the fermenter
-feedstock(the nutrients(glucose, amino acids)) are inserted to fermenter (glucose for fermentation, amino acids for growth of fungus)
-contents are stirred
-oxygen are inserted in the form of bubbles (provide large surface area for fungus)
-temperature, pH are regulated (regulation to make sure enzyme works in best condition)
-content are extracted
-penicillin are filtered

extra notes:
fermentation is an anaerobic respiration (C6H12O6 --> 2C2H5OH + 2CO2)
« Last Edit: May 23, 2010, 08:23:51 pm by someone »
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1753 on: May 23, 2010, 08:19:29 pm »
Quote from: someone on May 23, 2010, 08:17:38 pm
-fungus penicillium are put inside the fermenter
-feedstock(the nutrients(glucose, amino acids)) are inserted to fermenter (glucose for fermentation, amino acids for growth of fungus)
-contents are stirred
-oxygen are inserted in the form of bubbles (provide large surface area for fungus)
-temperature, pH are regulated
-content are extracted
-penicillin are filtered

24 degrees temp.

pH 6.5
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Always willing to help!  8)
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1754 on: May 23, 2010, 08:28:52 pm »

compare nervous and hormonal control systems

enzyme used to extract friut juice

thanks .. :)
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