Search found 94 matches

by drosophila
Fri Mar 26, 2010 6:49 pm UTC
Forum: Science
Topic: Why can't RNA branch?
Replies: 5
Views: 1775

Re: Why can't RNA branch?

The basic explanation is that in an organism, this reaction is catalyzed by RNA polymerase. The active site of the polymerase is structured in a way that can only accept nucleoside triphosphates (NTPs) in a specific orientation and only catalyze its reactions at a specific oxygen on the molecule. Th...
by drosophila
Tue Mar 23, 2010 7:31 pm UTC
Forum: General
Topic: REALLY Annoying Misconceptions
Replies: 4059
Views: 371071

Re: REALLY *fantastic* Misconceptions

I've run into a surprising number of well-educated people who believe that daddy longlegs are the world's most venomous spider (they are neither venomous nor a spider), or that one can get HIV from a toilet seat. Kind of makes me wonder what ridiculous misconceptions I have.
by drosophila
Thu Mar 18, 2010 7:34 pm UTC
Forum: Science
Topic: Is DNA actually a double helix? Why no google image results?
Replies: 21
Views: 9318

Re: Is DNA actually a double helix? Why no google image resu

My only doubt was placed on the sophistication of our scientific instruments. It's been a while since the famous image gmalivuk graciously provided was taken. I understand there is no need to take another one, but if we have better equipment than why not. I need a new desktop background. There has ...
by drosophila
Thu Mar 18, 2010 5:51 pm UTC
Forum: Science
Topic: Is DNA actually a double helix? Why no google image results?
Replies: 21
Views: 9318

Re: Is DNA actually a double helix? Why no google image resu

And the double helix was iirc discovered through X-Ray crystallography, so the famous picture is along the axis rather than from the side, and you have to know what you're looking at to conclude that it's a double helix. That picture is not a picture of DNA along the axis or otherwise. That is a di...
by drosophila
Mon Sep 28, 2009 4:17 pm UTC
Forum: Science
Topic: Viruses
Replies: 8
Views: 1117

Re: Viruses

The way I understand it, there isn't really a general rule for how many virions it would take to infect someone, but as shown above, you can establish an LD50 (lethal dose for 50% of a population, usually rats or mice) for a specific pathogen in added in a specific way to a specific tissue. A good w...
by drosophila
Mon Sep 21, 2009 7:43 pm UTC
Forum: Science
Topic: CAN YOU SOLVE THIS? From a water lab!
Replies: 8
Views: 1228

Re: CAN YOU SOLVE THIS? From a water lab!

Pink-producing bacteria (I forget the name of the really common ones)? Serratia marcescens? http://en.wikipedia.org/wiki/Serratia_marcescens They're ubiquitous, produce red or pink pigment, and would definitely be killed @pH <2. Also, you might could want to think in the direction of molds and fung...
by drosophila
Fri Jan 16, 2009 9:24 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0531: "Contingency Plan"
Replies: 135
Views: 26437

Re: "Contingency Plan" discussion

I don't know why everyone thinks that Randall got the science wrong here. It's clear to me that the male (biology major) in the comic has genetically engineered his child to not develop beta cells in its islets of Langerhans. This modification has the result of producing an insulin requirement in th...
by drosophila
Fri Dec 12, 2008 9:54 pm UTC
Forum: Science
Topic: Violent/Scary/Just Plain Weird Animal Behaviours
Replies: 20
Views: 2613

Re: Violent/Scary/Just Plain Weird Animal Behaviours

Funny you should mention that roach wasp. I was just reading this article on parasitic "mind control" from Discover magazine. It's a nice gallery of a lot of exactly this sort of stuff, including your Ampulicid. http://discovermagazine.com/photos/04-zombie-animals-and-the-parasites-that-co...
by drosophila
Sat Jan 05, 2008 7:39 am UTC
Forum: Forum Games
Topic: Scavenger Hunt
Replies: 970
Views: 240731

Re: Scavenger Hunt

Image

A "Hummingbird" or Sphinx moth.

I would like to see a green version of a normally not green animal.
by drosophila
Thu Jan 03, 2008 9:54 pm UTC
Forum: Science
Topic: Artificial insemnination with two male sperm cells
Replies: 39
Views: 4686

Re: Artificial insemnination with two male sperm cells

EDIT: In theory, this *could* work, since the machinery of the egg cell isn't "run" by the genetic material, but runs on its own; replication/translation start after fertilization to the "calcium wave," a biochemical signal that tells the egg cell to start turning into an embryo...
by drosophila
Fri Dec 28, 2007 4:48 am UTC
Forum: Forum Games
Topic: Scavenger Hunt
Replies: 970
Views: 240731

Re: Scavenger Hunt

Image

Show me a lot of unfortunate eggs.
by drosophila
Tue Dec 25, 2007 3:49 am UTC
Forum: Science
Topic: Non-productive Uses for Science!
Replies: 74
Views: 7540

Re: Non-productive Uses for Science!

According to WebElements, pure carbon melts at 3800K and boils at 4300K, so that's a 500K range of non-subliming molten-ness to play with. I suspect those figures are for graphite, not diamond. :P I have no citation for this, but I remember reading in a book that during the Chernobyl disaster the gr...
by drosophila
Tue Dec 18, 2007 3:05 am UTC
Forum: Science
Topic: Genertically Modified Organisms... Help please.
Replies: 18
Views: 2197

Re: Genertically Modified Organisms... Help please.

I was always curious about the insulin from bacteria thing, as insulin as i understand it is a protein that requires post translational modifications (a fold and a snip)... Are the requisite enzymes or folding/scaffolding proteins also transfected in? I don't actually know... *googles a bit* Well, ...
by drosophila
Sat Dec 15, 2007 3:44 am UTC
Forum: Science
Topic: Genertically Modified Organisms... Help please.
Replies: 18
Views: 2197

Re: Genertically Modified Organisms... Help please.

Do a search for "RoundUp Ready Cotton." There's a big fight over this product, you can probably find 5 pros and cons just from it alone. RoundUp is a broad spectrum herbicide that inhibits a gene (5-enolpyruvoyl-shikimate-3-phosphate synthetase, according to wikipedia) that is required to ...
by drosophila
Wed Dec 12, 2007 6:30 am UTC
Forum: Science
Topic: What, no biological sciences?
Replies: 75
Views: 21017

Re: What, no biological sciences?

Blowing my mind: antibody engineering.
by drosophila
Tue Dec 11, 2007 8:20 pm UTC
Forum: Science
Topic: What, no biological sciences?
Replies: 75
Views: 21017

Re: What, no biological sciences?

FRAP, or Flouresence Recovery After Photobleaching is what you just described, and its actually used to show how dynamic a structure is, protein turnover... I do alot of immunoflourescent staining, and am always amazed at how beautiful the images look. How do I post images here? Oh, ok, a lot makes...
by drosophila
Tue Dec 11, 2007 4:45 pm UTC
Forum: Science
Topic: Synthesizing helium?
Replies: 16
Views: 6930

Re: Synthesizing helium?

SanderJK wrote:There aren't that many NMR machines on the earth though


Doesn't every hospital with an MRI technically have an NMR? That seems like quite a lot of machines to me.
by drosophila
Mon Dec 10, 2007 11:41 pm UTC
Forum: Science
Topic: What, no biological sciences?
Replies: 75
Views: 21017

Re: What, no biological sciences?

I'm new to it, but Fluorescent Speckle Microscopy, (it is magic, just like intelligent design hehe), is a technique for measuring flow rates. In this context, its used to quantify the flow of proteins in cells, and compare it to the deformation of a substrate to give an indication traction forces. ...
by drosophila
Mon Dec 10, 2007 6:10 am UTC
Forum: Language/Linguistics
Topic: Words that are their own opposite
Replies: 67
Views: 9437

Re: Words like "cleave"

I like "fight with." It can mean to fight on the same or opposite sides.

I fought with that guy in my class and got suspended.

The United States fought with Great Britain against the Axis in World War II.
by drosophila
Mon Dec 10, 2007 5:54 am UTC
Forum: Science
Topic: Oncology terminology: Kicking genes when they are down
Replies: 5
Views: 1226

Re: Oncology terminology: Kicking genes when they are down

Squark is right in a way. That naming comes from the forward genetic screen used to identify the genes, like you see in Drosophila genetics. The wingless gene results in flies with no wings when it is knocked out, if you knock out frizzled, the fly's hairs look frizzled, etc. Kind of a-"Whoa, t...
by drosophila
Sat Dec 08, 2007 5:03 pm UTC
Forum: Forum Games
Topic: Scavenger Hunt
Replies: 970
Views: 240731

Re: Scavenger Hunt

3rd row down, "SZ"

Image

I'd like to see a VCR used in a survival situation.
by drosophila
Thu Dec 06, 2007 2:35 am UTC
Forum: Forum Games
Topic: Scavenger Hunt
Replies: 970
Views: 240731

Re: Scavenger Hunt

Burgers, chicken McNuggets, fries.

Image

May I see Rudy Giuliani's worst nightmare?
by drosophila
Tue Dec 04, 2007 6:22 pm UTC
Forum: Forum Games
Topic: Vending machine!
Replies: 11489
Views: 1025111

Re: Vending machine!

You get what looks like a puppy that has been pushed through a 1mm sieve.


I put in a pox virus.
by drosophila
Mon Dec 03, 2007 7:18 pm UTC
Forum: Forum Games
Topic: Vending machine!
Replies: 11489
Views: 1025111

Re: Vending machine!

You get the BeeGees. Barry Gibb is wearing your white coat. No, he will not give it back.

I put in a small collection of beetles.
by drosophila
Mon Dec 03, 2007 2:50 pm UTC
Forum: Science
Topic: Silly namings from science
Replies: 143
Views: 26184

Re: Silly namings from science

Oh, and when trees get flooded, a lot of times they will attempt to adapt by "butt swelling."
by drosophila
Mon Dec 03, 2007 2:57 am UTC
Forum: Forum Games
Topic: Scavenger Hunt
Replies: 970
Views: 240731

Re: Scavenger Hunt

Image

ribbit. ribbit.

I need a cookie used as a weapon.
by drosophila
Mon Dec 03, 2007 2:44 am UTC
Forum: Forum Games
Topic: Famous sayings/quotes/phrases.
Replies: 73
Views: 6117

Re: Famous sayings/quotes/phrases.

"You're a loony." Monty Python and the Holy Grail
by drosophila
Mon Dec 03, 2007 2:40 am UTC
Forum: Forum Games
Topic: Scavenger Hunt
Replies: 970
Views: 240731

Re: Scavenger Hunt

1. http://www.whatsthatbug.com/images/locust_borer_20061016.jpg 2-4. http://www.whatsthatbug.com/images/leatherwings_swallowtail.jpg 5. http://www.whatsthatbug.com/images/cuckoo_wasp_florida.jpg with bonus points! Show me a person happy with a snake in their house.
by drosophila
Mon Dec 03, 2007 2:27 am UTC
Forum: Forum Games
Topic: Vending machine!
Replies: 11489
Views: 1025111

Re: Vending machine!

You get a vending machine that follows you.

I put in an IPA (the beverage).
by drosophila
Mon Dec 03, 2007 1:43 am UTC
Forum: Forum Games
Topic: Vending machine!
Replies: 11489
Views: 1025111

Re: Vending machine!

You get Kevin Fedderline, covered in an unheard-of amount of hot sauce. <Ninja'd, but you get Fedderline anyway.>


I put in a week's worth of Ben Roethlisberger's dirty laundry.
by drosophila
Sun Dec 02, 2007 9:19 pm UTC
Forum: Forum Games
Topic: Vending machine!
Replies: 11489
Views: 1025111

Re: Vending machine!

You get a frowny.

I put a loonie into the machine.
by drosophila
Sun Dec 02, 2007 9:13 pm UTC
Forum: Science
Topic: Silly namings from science
Replies: 143
Views: 26184

Really dumb mde-up science words

So, in science a lot (at least molecular biology), you get to hack up and stick together science words to make new science words, and then actually publish using these Frankenstein words. What are the dumbest that you've come across? (I think this fits better here than in the Science forum; I might ...
by drosophila
Sun Dec 02, 2007 6:50 am UTC
Forum: Forum Games
Topic: Courrupt-a-question
Replies: 465
Views: 33974

Re: Courrupt-a-question

To be with Dada is to be against Dada.


Why is this thing starting to split open along the seams?
by drosophila
Sun Dec 02, 2007 6:44 am UTC
Forum: Forum Games
Topic: Vending machine!
Replies: 11489
Views: 1025111

Re: Vending machine!

You get a healthier vending machine.

I put in an unheard-of amount of hot sauce.
by drosophila
Sun Dec 02, 2007 6:38 am UTC
Forum: Language/Linguistics
Topic: strange and lesser known words
Replies: 79
Views: 14154

Re: strange and lesser known words

I like the word ait for a small island in the middle of a river. I spend time on the Mississippi and its tributaries and actually get to use the word pretty often.
by drosophila
Wed Nov 28, 2007 9:03 pm UTC
Forum: Science
Topic: What, no biological sciences?
Replies: 75
Views: 21017

Re: What, no biological sciences?

Undergrad, just about to graduate with a molecular biology degree. I've been working in a virology lab close to full-time (taking a semester off-campus). I'll probably lean towards some sort of infectious disease stuff for grad school.

*Can't really help with the E.coli problem though :P*
by drosophila
Fri Oct 26, 2007 2:31 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0334: "Wasteland"
Replies: 199
Views: 28720

Re: "Wasteland" discussion

April is the cruelest month...
by drosophila
Wed Sep 12, 2007 6:05 pm UTC
Forum: Science
Topic: Burning salt water
Replies: 49
Views: 6575

Efficient, no. But it could still be a pretty cool light, you could change the color of the light by changing whatever salt was in your water... potassium for purple, sodium for orange, copper for blue-green... It would probably take a lot of electricity to get enough hydrogen to be constantly runni...
by drosophila
Wed Sep 12, 2007 2:53 am UTC
Forum: Science
Topic: Burning salt water
Replies: 49
Views: 6575

After all, it took me far less time to search for "salt water energy" than it did to make that whole disclaimer edit to apologize if it's a repeat. Haha, naive one, printing retractions went the same way as journalistic integrity. They didn't bother searching because there are no conseque...

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