Search found 21 matches

by Layd33foxx
Tue Apr 10, 2012 5:43 am
Forum: Microbiology
Topic: Koch's postulates or De Barry's
Replies: 1
Views: 3494

Koch's postulates or De Barry's

Why do you suppose we use Koch's postulates instead of something called De Barry's?
by Layd33foxx
Sun Apr 08, 2012 5:45 pm
Forum: Microbiology
Topic: Porin-deficient mutant
Replies: 4
Views: 6587

Re: Porin-deficient mutant

Bacteria can develop resistance to the antibiotic by mutating the gene that encodes the porin – the antibiotic is then excluded from passing through the outer membrane
by Layd33foxx
Sun Apr 08, 2012 5:33 pm
Forum: Microbiology
Topic: Porin-deficient mutant
Replies: 4
Views: 6587

Re: Porin-deficient mutant

Porins are channels control the transport of substances in and out of the cell, imparting the membrane its property of semipermeabililty.
by Layd33foxx
Fri Apr 06, 2012 5:29 am
Forum: Microbiology
Topic: Enzyme that inactivates streptomycin
Replies: 1
Views: 5018

Enzyme that inactivates streptomycin

Why do you suppose Streptomyces griseus produces an enzyme that inactivates streptomycin?Why is this enzyme produced early in metabolism?
:?:
by Layd33foxx
Fri Apr 06, 2012 5:26 am
Forum: Microbiology
Topic: Porin-deficient mutant
Replies: 4
Views: 6587

Porin-deficient mutant

:?: Some bacteria become resistant to tetracycline because they don't make porins. Why can a porin-deficient mutant be detected by its inability to grow on a medium containing a single carbon source such as succinic acid?
by Layd33foxx
Fri Apr 06, 2012 5:13 am
Forum: Microbiology
Topic: Help identifying a unkown
Replies: 2
Views: 3700

The litmus milk is pink..
by Layd33foxx
Fri Apr 06, 2012 5:12 am
Forum: Microbiology
Topic: Help identifying a unkown
Replies: 2
Views: 3700

The first one looked like mine. I put variable but I think it was negative since I moved it accidentally... the sharp needle is too dam fragile. Thats just me.
by Layd33foxx
Wed Mar 28, 2012 1:06 am
Forum: Microbiology
Topic: Viral Culture revealed
Replies: 0
Views: 4136

Viral Culture revealed

A 40 yr old male who was seropositive for HIV experienced abdominal pain, fatigue, and low grade fever 38C? for two weeks. A chest x-ray examination revealed lung infiltrates. Gram and acid fast stains were negative. A viral culture revealed the cause of his symptoms: a large, enveloped polyhedral v...
by Layd33foxx
Wed Mar 14, 2012 11:10 am
Forum: Microbiology
Topic: Concept Map Help
Replies: 6
Views: 5809

Nah
by Layd33foxx
Wed Mar 14, 2012 3:00 am
Forum: Microbiology
Topic: Concept Map Help
Replies: 6
Views: 5809

I know what they mean you are not answering the simple questions thanks!
by Layd33foxx
Tue Mar 13, 2012 1:03 pm
Forum: Microbiology
Topic: Concept Map Help
Replies: 6
Views: 5809