Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Bacteria in our Lives

Career Day For Girls Demo
by

Mohanned El-Natour

on 26 February 2011

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Bacteria in our Lives

Bacteria in Our Lives Northwestern University
Career Day For Girls
02.26.2011 > bacteria are present on almost everything that you touch

> The average person’s body contains 2-5 pounds of bacteria

> Some bacteria cause us to get sick, but the majority of bacteria do not harm us. In fact, many actually help us to digest food and prevent harmful bacteria from growing in the body. Biofilms > A biofilm forms when bacteria sticks to each other and to a surface.

> The biofilm makes a slimy substance that helps the bacteria stick to the surface and to each other

> A biofilm can be formed of a single bacterial species. But it might be made of a lot of bacterial species, as well as fungi, algae, and protozoa where are biofilms found? types of bacteria >> bacteria come in three different
shapes or morphologies: how can we observe and study microbes? >> use microscopes
>> Grow Bacteria in Laboratory the gram stain > Gram staining is a differential staining technique that provides an easy way to differentiate between bacteria into two different groups:

>>Gram positive
>>Gram negative

> Basic classification of bacteria is based on the cell wall structure. The Gram Stain process includes the use of:
*a primary stain (crystal violet)
*a mordant (helper) iodine solution,
*a decolorizer(.95% ethanol),
*a counterstain (safranin).

how to grow bacteria in a lab: >> Take a sample of bacteria from everyday life (ex. Bathroom, carpets, rivers, etc.)

>> Agar is a culture medium that contains nutrients for bacteria growth

>> Spread bacteria on agar plates. One bacteria reproduces millions of offspring that finally form one visible colony. >> bacteria are Everywhere!
Full transcript