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- Friday - replate of transformed E. coli stab. [3 Updates]
Ian Hawkins <ianfh...@gmail.com> Jul 06 12:46PM -0400 ^
We didn't get any colonies on the new Amp IPTG LB plates, so I'm going in Friday around 7 pm to take a fresh sample from the refrigerated stab. I'll also be doing some brainstorming on modular small-scale biotech procedure automation widgets al la MakerBot toolheads.
Thanks,
Ian Hawkins
617.784.9157 (m)
ianfh...@yahoo.com
Sent from my iPad
Mackenzie Cowell <m...@diybio.org> Jul 06 12:52PM -0700 ^
I'll see you there.
Mac
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Dakota Hamill <dko...@gmail.com> Jul 06 09:41PM -0400 ^
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I'm heading into Sprout tomorrow to pick up the beer (if it's still
drinkable) as well as some Growlers, to bottle, then I'll be back Friday
night and bring you back a sterilized bucket and bubble chamber Mac. I
wanted to get in earlier but the convertible I was driving kept shutting
down on hot days from overheating, even with coolant, so I didn't want to
drive it in. Also couldn't figure out how to move 10 Growlers or a 5 Gallon
bucket back and forth on the T.
I'll bring in the saline agar plates material I have and pour some if it
makes sense, then if anyone wants to keep some and get their own fish for
the glow in the dark bacteria, go for it. It's another thing I've been
hanging onto for a year.
-Dakota
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I can help with that. Will let you know after I get off work.
--Avery
from my notes last time I tried:
13 Jan 2010
18:30 Got fresh, “uncleaned” squid from New Deal Fish Market in Union Square: $2.50
18:55: got 1L gatorade
Added 1/2 teaspoon of sea salt to the empty gatorade bottle
22:00 cut squid head in 1/2, added to tap water in gatorade bottle
14 Jan 2010
22:00 It GLOWS! wow!
I could get y'all a squid. You guys game? Let me know.
--Avery
Ok. I'll let you know if there are any in ~30 min.
--Avery
Ok.
Squid acquired!
No uncleaned squid at the market today :(
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Hey guys, who is on squid duty tonight? Is it me?
--Avery
Ok. I might stop by tonight
--Avert
When I stop by, it will be lateish, as it is laundry day :(. Is there some way I can get in then?
--Avery
Any news on the squid?
I had to cook dinner tonight, so I will be over within an hour.
I was doing some reading and it sounds like it might be best to take it out of a plastic bag like that, because it can lead to smearing, whereas if its just resting in an open box the colonies can stay nice and tightly organized and won't get smudged every time you ruffle the bag closed. just a thought tho, I'm hoping tomorrow i might see something on this piece of squid, otherwise i'm going to head down to the fish pier in gloucester and try and find something and put these 2 plates to use
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I'm about ready to just streak a plate and see if I can isolate glowing colonies from that, because if they don't show up tomorrow I don't think they'll show up, at least on my small little piece.
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we may need more air than that ...
Lm. Is the ssw media for the v. Fischeri. Can o servos ought be be back in the box
For sure.
I am going to go by sprout tonight and check the squid. Wil there be people there?
--Avery
En route.
--Avery
The squid was gone, but the smell lives on...
Yea...around 1030? unless it was hiding. Found the can o servos, it was in the bottom green box under the bench.
Where does it say anything about circadian rhythms? I would like to read about it.
The luminescence appears to follow a circadian rhythm. That is, it is brighter during the nighttime than during the daytime.
Each morning, beginning with the first dawn following colonization of the organ, the squid vents 90% of its crypt contents into the body cavity (Fig. 5A), and the ventilatory movements of the squid carry this material out into the seawater (19, 31). The remaining 5 to 10% of the bacteria multiply and repopulate the light organ over the day. This behavioral pattern is not an entrainable, or circadian, rhythm; the animal responds each morning directly to the cue of an increasing level of ambient light (5, 31). Host-controlled muscular pressure imposed on the crypts results in the release of a thick exudate (Fig. 5B) containing not only bacteria but also macrophages, epithelial cell debris, and the protein-rich matrix of the crypt spaces (12, 31). This expulsion event may serve several functions. For example, this behavior may be a means of controlling symbiont number: while V. fischeri is not considered a pathogen, unchecked bacterial multiplication might harm the host. Also, it may be important for the squid to maintain a fresh culture ofV. fischeri cells. V. fischeri cells grown in culture induce luminescence in a density-dependent (autoinducer-dependent) manner (3). Coincident with stationary phase in culture, however, the level of luminescence drops. Furthermore, V. fischeri cells exhibit poor stationary-phase survival in the laboratory. Because bioluminescence is unnecessary in the daylight hours after dawn, during which time the animal is buried in the sand, expulsion of the bacteria may serve to maintain a healthy culture of bacteria that will be ready to bioluminescence the following evening.
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<Luminous bacteria.pdf>
Im going to pick up some dead sea-critters today/tm. I will find somewhere to incubate and see if I get glowies; if I do, may I plate them?
--Avery
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Got mo squid.
Notebook entry 9:00
Incubated squid on the red line...
I got bright, small colonies. Will plate today.
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That was facetious. Hess to lab now. Worried it wil be too bright to see colonies/they wil get smeared en route
Plated, in the fridge!
It grew...bigger. After a few hours outside, the light from the squid is brighter. Im going to try to photograph it. I am leaving the plates out at the moment
Epic pix
I took done pix out of range of the I fi, how do I get them off the card? They are on the camera...
Fixed problem.
Took pix in RAW, going to take card to home computer to try to extract them
Will bring back to sprout tm morning.
Pix should auto upload to flkr
Leaving squid to incubate a bit more at rt
Plated once again; no growth on previous plates, which I find strange; you would think something would grow, our maybe I'm just pro at sterile techniques... Threw away squid, as most of it had stopped glowing, and the smell was growing. May check back tm to see if there is any growth. Left plates next to tablet.
Other thoughts: if we boil/blend some squid up, do you think we could use the liquid for media?
If no growth by mon night, reccomend we ought to get more squid.
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On the counter in front of the tablet
If anyone is in the lab today, please check and see if there is any growth on the plates.
I was going to head in there to meet those German kids at 1 pm but I only have my car until 5:30 or so and it seems they are coming back at 9pm so I'm out of luck. I still need to offload some of this beer.
It sounded like another person or two were interested in coming because of that back pain genotyping thing, maybe they will stop by for another meeting. Although, the Ginger beer/soda making thing Ian is doing is this Friday right? So perhaps that's when I'll bring everything in.
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Mac, I doubt they are a single species in that colony yet. Pcr will probably turn out poorly
They came from a mixed sample and could very easily be a mixed colony.