Bacterial characteristics - Gram staining | Cells | MCAT | Khan Academy
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- Опубліковано 29 вер 2024
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OH MY GOD. Lady, you are truly a gift to us Microbiology students around the world. WHERE CAN I FIND MORE OF YOUR LECTURES? I WANT THEM.
@@drewduncan7702 stfu
Only if you sub first
I want to point out that while yes, the crystal violet does eventually wash off from the Gram negative bacteria, it's the iodine that encapsulates the Gram positive first, so they don't get decolorized by the alcohol. That's when the last stain (the Safranin) would stain the Gram negatives. I understand this is an educational video, and I know some of it may have been a little rushed for the sake of getting the point across, but I believe that understanding the process of staining and how it actually works is much more beneficial to viewers than a simple, "it stays purple because that's just what Gram positives do."
from iraq i very happy thenks
AMAZING!!!!!!! I sat in lab for 4 hours and l learned more in this 7.24 min clip. Thnak you
...I’m half way thru my semester and you just explained everything in a 7 minute video that I’ve been trying to understand the past 2 months. My professor SUCKS! Tysm
OMG This is the best video I have seen thus far on Gram Positive and Gram Negative staining. Thank you so much for thoroughly explaining this process.
This is like 2 hours of lecture and yelling from my lecturer..do you understand class..! picture they say is worth a thousand words..thanks for d video..did a whole lot of good in my understanding..but u didn't tell the arrangements of the bacteria..single(one) doubles(two's) in chains(long or short)..in clusters(ie bunches)..anyway thanks a bunch..!
me be watching this day before microbiology exam
Every time I see thumbs down for these videos I get really concerned. Idk if they got something wrong or if people just don't like it
Well explained, thank you soo much! :)
Thankyouuu, I understand it really well..
Perfect! Thank you! Succint and the illustrations helped a lot.
Thanks a ton. Can you please make a video for the functioning of the ear and also for muscle fibers with all the muscle fiber's bands and the "gliding" method by which a muscle moves
nica and cool explanation.
now i know why it was colored that way. hm.
ua-cam.com/video/F8ZlJ8YCrWM/v-deo.html
THANK YOU!!!!!!!!!!!!!!!!!!!!!! I'm like WTH ! Why is it so easy to understand here compare in class lol! thank you, again for saving me once again. I went back to school after finishing LPN (I used Khan to study, too) and passing nclex and
thank you, you cleared a couple things I never quite grasped.
Why can't my teacher be this simplistic
damn I should watch this video when quarter began danmmmmmmmmm
i think she might be the reason i pass my exam in 8 hrs
Oh thank you, you are a gift from god. Your video saved my career
AMAZING LECTURE THANKS
Thankyou so much !!!!
So well explained!!
Thank You!
what part of the bacteria structure holds the stain?
pretty sure its the peptidoglycan. which is why the negative doesn't hold it well, bc its peptidoglycan is so thin
@@addisonjune thank you
My goodness lady! Before watching this video, I was completely oblivious to Gram-Staining, and how it works. I'm so glad God used you to put this video up, because he KNEW I would have microbiology spring 2016
Free Floating same here. They teach us like if we know everything
@@XxAlex530xX fr. its fustrating
Great video. Te only grips I had was the "wash it off" part. As we know. You stain the bacteria with ultra violet stain, keep the stain on for 30 seconds, rinse with distilled H2O, gram stain for 60 seconds, rinse with H2O, tilt glass slide at 45 degree angle, then apply ethanol to the stain slowly(one drop at a time) then rinse with H2O, Safran stain for 60-120 seconds, rinse with H2O, then blot dry, then observe over microscope.
The application of ethanol is very important in my opinion.
But I digress because you can't think of all the details, such as I can't either.
MADEM - BEAUTIFUL EXPLANATION - K V C RAO
Thank you to whoever contributed in making this video
i havent done my online biology in a month and this still makes sense to me. this is amazing
ua-cam.com/video/F8ZlJ8YCrWM/v-deo.html
Thank you so much! This was really helpful :D
Excellent explanation, thanks!
Spirilla is not the plural of spirochete. Spirilla is the plural of spirillum. Spirilla and spirochetes are 2 different shapes. Spirilla are a loose coil while spirochetes are a tight coil.
The videos are really good but I think if you are teaching to medicos you need to go a bit more into the technical terms... it is too superficial
I completely understood this!!! Thank you 10000000 times!!!
wow, this was great! but i have to keep watching it over and over.
Plz explain the staining topic for class 11 student
Would you like to explain the circulation chapter briefly
Really helpful, thank you ❣️
ua-cam.com/video/F8ZlJ8YCrWM/v-deo.html
Perfectly explained
Love youuu
Nice explanation really helpful
that lady is excellent at what she does
WHAT SOFTWARE ARE YOU USING
OMG,,,its so helpful it help me alot
You are amazing Khan academy
What does the teichoic acid do?
where my boy sal at tho...
thank u very very very much
Thank you so much. Great explanation, well structured (also the drawings) and on point.
totally useful😊😊😊
Spirochete plural version spirilla????
That is an error. Spirochete and spirilla do not mean the same thing. If you haven't yet, google differences between spirochete and spirilla and also check out the wikipedia page Spiral bacteria.
Thank you medam.
thank you sooo much
Helped a lott
how long does it take to perform and analyze a gram stain ?
If you're a klutz in the lab like me, longer than you might like...if you're competent...a couple minutes...
If you need a fast method you could always try with a KOH test
thanks much.
so nice
Thank you
Thank you so much
nice
pp
Thank you!
2nd
omg this ladies voice is so sooo fucking cute 😍😍
??? her voice is so normal lmao
This lecture is not 100% accurate sadly. A little vague when it comes to the staining techniques, to say the least. Good color differentiation in the diagram along with the black background was very enjoyable however.
Sorry for this late comment, but can you explain the inaccurate parts for me? Thank you.
@@linkh1435 I would add the function of the decolorizer: how it dissolves the outer membrane of Gram negative cells to facilitate counterstaining. Otherwise great video!
Please where are your other lectures?
Example of gram negative bacteria? ?
E.coli, Enterobacter
Best lecture...
thax
Thank you 🌸
Such an soothing and un intimidating voice.
Awesome video, though I feel like I should point out that spirochete and spirilla are actually different types of bacteria.
Thank you! :)
what properties does the wall have that makes the dye stay on?? does a thicker petidoglycan wall absorb the crystal violet more or something???
Tropical StormXoX yes. The thicker peptidoglycan layer holds the dye from the crystal violet. That's what gives it the blue stain
The thicker the peptidoglycan layer the more dye it will absorb therefore making it gram-positive. The thinner the peptidoglycan layer the less It will absorb therefore making a gram-negative
thanks aloooot
im really impressed by the explanation, the actual purple staining splatter on the drawings. This is next level
Trick to remember that gram negative has a smaller peptidoglycan layer and a lipopolysaccharide layer:
For athletic performance, it's negative eat more fat and carbs (lipopolysaccharide) instead of getting enough protein (smaller peptidoglycan layer)