Bacterial characteristics - Gram staining | Cells | MCAT | Khan Academy

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Опубликовано:

22 янв 2015

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Комментарии : 100

@crystalleitch1130 4 года назад

AMAZING!!!!!!! I sat in lab for 4 hours and l learned more in this 7.24 min clip. Thnak you

@mmaking8664 8 лет назад

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.

@oms7963 5 лет назад

@@drewduncan7702 stfu

@drewduncan7702 5 лет назад

Only if you sub first

@sophiaherleyy7382 4 года назад

...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

@colekena5018 2 года назад

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.

@AAA97391 6 лет назад

This is gold.... thank you!

@kosgengster1991 8 лет назад

Perfect! Thank you! Succint and the illustrations helped a lot.

@zoeyzenger5850 3 года назад

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."

@nevaehchee1670 8 лет назад

thank you, you cleared a couple things I never quite grasped.

@thoufeeqahamed5489 8 лет назад

Well explained, thank you soo much! :)

@reyianjohngayomali5178 2 года назад

Thankyouuu, I understand it really well..

@trinapooh1988 8 лет назад

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

@XxAlex530xX 7 лет назад

Free Floating same here. They teach us like if we know everything

@Luceium01 4 года назад

@@XxAlex530xX fr. its fustrating

@mcawesomeytyo3312 Год назад

Oh thank you, you are a gift from god. Your video saved my career

@Brynnerbrynner 3 года назад

So well explained!! Thank You!

@maham5856 7 лет назад

OMG,,,its so helpful it help me alot

@hopejensen3929 3 года назад

I completely understood this!!! Thank you 10000000 times!!!

@dr.monikabhuriya10 8 лет назад

Thank you medam.

@prettyxpetite 2 года назад

wow, this was great! but i have to keep watching it over and over.

@NicolasGanea 4 года назад

Perfectly explained

@louisiannesaldagna5807 4 года назад

i havent done my online biology in a month and this still makes sense to me. this is amazing

@RahulPagar 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F8ZlJ8YCrWM.html

@astethoscope6468 8 лет назад

Thankyou so much !!!!

@pharmacyera3421 7 лет назад

thanks much.

@VibeMD 9 лет назад

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

@irenenatsis9240 8 лет назад

AMAZING LECTURE THANKS

@arunmoses2197 4 месяца назад

Excellent explanation, thanks!

@jjayrockz123 8 лет назад

Thank you so much

@Ara2061 5 лет назад

totally useful😊😊😊

@pancakez227 9 лет назад

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.

@ramroom619 8 лет назад

Thank you to whoever contributed in making this video

@safahmz5561 7 лет назад

thank you sooo much

@mahadnur746 8 лет назад

Thank you so much! This was really helpful :D

@hannahdivic28 4 года назад

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

@mohammadal-ghanim825 6 лет назад

from iraq i very happy thenks

@ruisucepi 5 лет назад

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

@rafiknabil2144 6 лет назад

You are amazing Khan academy

@17ReeM17 8 лет назад

thank u very very very much

@23vamsib92 3 года назад

Nice explanation really helpful

@charlieakz4237 3 года назад

Helped a lott

@clintonbortz1537 4 года назад

Thank you

@md.lutfarrahmanroni2060 7 лет назад

so nice

@lukob6368 7 лет назад

that lady is excellent at what she does

@kvcrao7472 Год назад

MADEM - BEAUTIFUL EXPLANATION - K V C RAO

@shahadab1693 6 лет назад

Really helpful, thank you ❣️

@RahulPagar 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F8ZlJ8YCrWM.html

@aviaxferg 4 года назад

Thank you!

@Jojo-kl6tx 5 лет назад

Thank you so much. Great explanation, well structured (also the drawings) and on point.

@jennyenobay444 3 года назад

me be watching this day before microbiology exam

@MultiPunk777 8 лет назад

nica and cool explanation. now i know why it was colored that way. hm.

@RahulPagar 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F8ZlJ8YCrWM.html

@asmajahan6079 6 лет назад

Best lecture... thax

@rkm7174 7 лет назад

Thank you 🌸

@jollyjoseph8596 3 года назад

Love youuu

@roselitodaynatatoy8387 8 лет назад

nice

@Itsahilali 6 лет назад

i think she might be the reason i pass my exam in 8 hrs

@nsuhoreidemmichael1211 Год назад

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..!

@XxAlex530xX 7 лет назад

Why can't my teacher be this simplistic

@talhakhan3989 3 года назад

Plz explain the staining topic for class 11 student

@talhakhan3989 3 года назад

Would you like to explain the circulation chapter briefly

@KyongchaeYi 5 лет назад

damn I should watch this video when quarter began danmmmmmmmmm

@khaledali2414 3 года назад

WHAT SOFTWARE ARE YOU USING

@amjadilham4174 3 года назад

What does the teichoic acid do?

@onyiimale 8 лет назад

Please where are your other lectures?

@ChompNom 6 лет назад

im really impressed by the explanation, the actual purple staining splatter on the drawings. This is next level

@houstoncambodia 7 лет назад

Awesome video, though I feel like I should point out that spirochete and spirilla are actually different types of bacteria.

@sevenways2029 4 года назад

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.

@Shirkietheshark 6 лет назад

Thank you! :)

@jeannie7919 4 года назад

what part of the bacteria structure holds the stain?

@addisonjune 4 года назад

pretty sure its the peptidoglycan. which is why the negative doesn't hold it well, bc its peptidoglycan is so thin

@jeannie7919 4 года назад

@@addisonjune thank you

@AmadaMia17 6 лет назад

Such an soothing and un intimidating voice.

@destinybasedoll 4 года назад

how long does it take to perform and analyze a gram stain ?

@marksmadhousemetaphysicalm2938 3 года назад

If you're a klutz in the lab like me, longer than you might like...if you're competent...a couple minutes...

@ShaneshaS 3 года назад

If you need a fast method you could always try with a KOH test

@redgeKagaoan 9 лет назад

2nd

@mariedoricecollet7894 4 года назад

Spirochete plural version spirilla????

@backstreetfan2887 3 года назад

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.

@yasminejb8073 6 лет назад

thanks aloooot

@tropicalstormxox9444 6 лет назад

what properties does the wall have that makes the dye stay on?? does a thicker petidoglycan wall absorb the crystal violet more or something???

@StudyWithM3E46 6 лет назад

Tropical StormXoX yes. The thicker peptidoglycan layer holds the dye from the crystal violet. That's what gives it the blue stain

@rosarose9642 6 лет назад

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

@jiahali5455 4 года назад

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

@user-rc8mb3zf7y 6 лет назад

Example of gram negative bacteria? ?

@A11L9E 4 года назад

E.coli, Enterobacter

@micahpaik5445 4 года назад

where my boy sal at tho...

@ThyThy-ly3pi 7 лет назад

@IsabellKay9965 8 лет назад

omg this ladies voice is so sooo fucking cute 😍😍

@saadrehman362 5 лет назад

??? her voice is so normal lmao

@icysamurai1485 Год назад

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)

@kodywalter8348 6 лет назад

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.

@linkh1435 4 года назад

Sorry for this late comment, but can you explain the inaccurate parts for me? Thank you.

@jeffbaldwin3317 3 года назад

@@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!