## Search found 419 matches

Tue May 04, 2010 8:02 pm UTC
Forum: The Help Desk
Topic: Algebra in Excel
Replies: 2
Views: 632

### Re: Algebra in Excel

*facepalm*

I've been doing so many other fancy maths in excel (cross checking data, etc)...you are absolutely right.
Tue May 04, 2010 6:33 pm UTC
Forum: The Help Desk
Topic: Algebra in Excel
Replies: 2
Views: 632

### Algebra in Excel

Hi all, I'm doing research in medical school in ob/gyn. I'm working on a project where we administer a survey between weeks 10-20 of pregnancy. The trick is we plan on catching the patients again after 34 weeks. I'm using Excel 2003. So, the question is, given a certain due date and today's date, Ho...
Thu Apr 08, 2010 4:10 am UTC
Forum: Science
Topic: Question: Biology | Fleshy Animals | Cells, Atoms
Replies: 40
Views: 4886

### Re: Question: Biology | Fleshy Animals | Cells, Atoms

I'm not an expert, but I'd think that if you had regular carbon turnover, they wouldn't be able to determine that Americans eat so much corn from the higher levels of 13C in our bodies. http://www3.interscience.wiley.com/journal/110463919/abstract?CRETRY=1&SRETRY=0 (Corn being a carbon greedy C4...
Mon Feb 22, 2010 3:31 am UTC
Forum: Science
Topic: Carbonic acid, carbon dioxide and soda water
Replies: 21
Views: 3779

### Re: Carbonic acid, carbon dioxide and soda water

I am pretty certain that photosynthetic conversion of carbon into sugar only happens within the leaves (stomas?), and is a light independent reaction. How does your p-value/chi/whatever look? Any chance this is random? I am (unfortunately) skeptical that a weak acid (ph 6ish?) can have any effect on...
Tue Dec 15, 2009 12:53 am UTC
Forum: Science
Topic: Proof that Quantum Physicists are just screwing with us
Replies: 38
Views: 4664

### Re: Proof that Quantum Physicists are just screwing with us

I'm just going to poke in here and say that this idea was tossed around fairly successfully in The Prestige. Will I be the man in the back? or the man in the box tonight?
Tue Nov 10, 2009 6:09 am UTC
Topic: Black Athletes
Replies: 107
Views: 13431

### Re: Black Athletes

I hear what your saying, but I also wonder if beyond physical ability, that there are far stronger psychosocial factors that promote African-Americans to aggressively compete in professional sports than white. I think it could be safe to say that white children still have in this day and age far mor...
Tue Jul 28, 2009 7:27 pm UTC
Forum: Science
Topic: Our bodies all have the same chirality. Isn't that weird?
Replies: 53
Views: 6891

### Re: Our bodies all have the same chirality. Isn't that weird?

Situs inversus and detrocardic folk can receive transplanted organs (but seriously, what's the rate of heart transplant v. these conditions...). I would imagine something like a liver would be tough, but the cardiopulmonary system can be done with lengthening/shortening some of the major vessels. Ne...
Wed Jun 24, 2009 8:58 pm UTC
Forum: Science
Topic: The flaw of "immersive" simulators...possible resolutions?
Replies: 20
Views: 1998

### Re: The flaw of "immersive" simulators...possible resolutions?

Just came in here to say that I toatally agree with Zeroignite. Mission space puts a surprising amount of G-force on you during takeoff. So much, that it has quite literally killed some people. Whoops.
Mon Jun 22, 2009 9:21 pm UTC
Forum: Science
Topic: Our bodies all have the same chirality. Isn't that weird?
Replies: 53
Views: 6891

### Re: Our bodies all have the same chirality. Isn't that weird?

Since the cell membrane and molecular machinery in first generation would come from the original bacterium I would hardly call that completely bottom up. Mutating, cloning or genetically modifying existing life is not making it. Even if one made it even more from scratch many parts (nucleic acids a...
Sun Jun 21, 2009 8:44 pm UTC
Forum: Science
Topic: Our bodies all have the same chirality. Isn't that weird?
Replies: 53
Views: 6891

### Re: Our bodies all have the same chirality. Isn't that weird?

D-serine induces renal lesions (best seen in renal failure patients with high creatinine in the hospital), and most are nutritionally antagonistic and reduce the metabolism of normal amino acids. D-amino acids are incorporated into normal proteins and result in improper peptide bonding. Enzymes are ...
Sun Jun 14, 2009 6:37 pm UTC
Forum: Science
Topic: Do you know what this is? (eye conditions)
Replies: 11
Views: 2127

### Re: Do you know what this is? (eye conditions)

Quite often in medicine if it isn't killing anyone or there isn't money in it, we actually DON'T know much about it. 25 years ago we were rubbing Maalox on bedsores hoping they'd go away. We thought ulcers were caused by stress, because how could a bacteria ever live in the stomach. It wouldn't surp...
Thu Jun 11, 2009 7:15 pm UTC
Forum: Science
Topic: Our bodies all have the same chirality. Isn't that weird?
Replies: 53
Views: 6891

### Re: Our bodies all have the same chirality. Isn't that weird?

Reverse chirality amino acids are toxic to us I do believe.
Wed Jun 10, 2009 6:06 pm UTC
Forum: Science
Topic: Our bodies all have the same chirality. Isn't that weird?
Replies: 53
Views: 6891

### Re: Our bodies all have the same chirality. Isn't that weird?

This is actually not terribly uncommon, usually genetic. That is, you see it in everyday practice if you see enough patients, and not just with mirror twins. It's called situs inversus, IFIC usually has to do with microtubual formation not going quite right. http://en.wikipedia.org/wiki/Situs_invers...
Wed May 20, 2009 10:48 am UTC
Forum: Science
Topic: Fetal Pig Dissection Help (now with images!)
Replies: 6
Views: 1309

### Re: Fetal Pig Dissection Help (now with images!)

That's a Bochdalek hernia. Keep those pictures, it's cuter when it happens in pigs than babies. Congenital Diaphragmatic Hernia.

http://en.wikipedia.org/wiki/Bochdalek_hernia
Tue May 05, 2009 5:43 pm UTC
Forum: Science
Topic: Negative pH
Replies: 20
Views: 2549

### Re: Negative pH

If memory serves, wacky pH's are easier achieved in a solvent that isn't water. Ammonia for example can give wacky pHs, but then I don't think the scale centers at 7 anymore? Is this dramatically wrong? Aha, answered my own question, should have jfgi. Question - Question #26 in the Chemistry archive...
Wed Apr 15, 2009 6:40 pm UTC
Forum: Science
Topic: Scanning the brain
Replies: 9
Views: 1532

### Re: Scanning the brain

With fine enough resolution, it doesn't seem that difficult to imagine a two input system to a single neuron (A+B to C) that you could figure out that: 1. Either neuron firing alone causes a new AP 2. Only A firing causes an AP 3. B firing produces no AP 4. A+B produces no AP, while A alone 5. A+B i...
Mon Mar 30, 2009 11:10 pm UTC
Forum: Science
Topic: Ultrasound and Speed of Blood?
Replies: 12
Views: 1964

### Re: Ultrasound and Speed of Blood?

I'm no expert, nor an US tech, but the specialized application you guys might be thinking of is a doppler. Many of the fancier US machines have not only Beta (Or B-scan) which shows a 2D picture using US, but also a doppler flow mode. Since doppler uses sound waves, it is a form of US, most commonly...
Wed Mar 25, 2009 3:33 pm UTC
Forum: Science
Topic: Diet Coke vs. Coke Zero
Replies: 21
Views: 3422

### Re: Diet Coke vs. Coke Zero

Thank you, above poster. Everyone seems to be forgetting that they're different products, with different flavors. I bet any of you schmucks could tell diet coke from coke zero (and maybe from coke) in a blind taste test. If you can only see blank cans, a quick and dirty density float test will tell ...
Mon Jan 19, 2009 2:32 pm UTC
Forum: Science
Topic: Antioxidants
Replies: 18
Views: 1783

### Re: Antioxidants

But it's the same deal as soap being labeled "antibacterial". Oh yes, we want that "antibacterial" soap. I find this comment interesting, since I spent five minutes earlier today trying to find a dish soap that didn't have added antibacterial ingredients. That's because not all ...
Mon Jan 12, 2009 12:23 pm UTC
Forum: News & Articles
Topic: RIAA to abandon policy of suing file-sharers
Replies: 138
Views: 10769

### Re: RIAA to abandon policy of suing file-sharers

I'm curious what the number of people who claim that violating their ISP's TOS is all well and good are actually the ones paying for the service. I can see how it could be a lot easier to ignore TOS if you aren't paying the bills, or have a credit card, or other rights-responsibilities such as that....
Wed Dec 31, 2008 3:16 am UTC
Forum: Science
Topic: quitting smoking has covered me in spots
Replies: 18
Views: 4399

### Re: quitting smoking has covered me in spots

Wed Dec 31, 2008 2:08 am UTC
Forum: Science
Topic: quitting smoking has covered me in spots
Replies: 18
Views: 4399

### Re: quitting smoking has covered me in spots

It sounds more like a skin infection, especially if they're pussy. That, or you have something autoimmune going on. Job's syndrome or some zebra like that.

Otherwise, foliculitis.
Mon Dec 29, 2008 8:50 am UTC
Forum: Science
Topic: quitting smoking has covered me in spots
Replies: 18
Views: 4399

### Re: quitting smoking has covered me in spots

By spots do you mean acne? Big pustules? Fluid filled golfballs under your skin? Raised plaques? Flat patches of red? scaley? skin discoloration?

Need more description.
Thu Dec 25, 2008 7:09 pm UTC
Forum: Science
Topic: Single Photon Color Question
Replies: 10
Views: 1517

### Re: Single Photon Color Question

Are there photodetectors (Are APDs still top of the line?) that can detect single photon presence AND frequency? I always had to split and filter colors to separate APDs. That would be damn convenient.
Wed Dec 24, 2008 4:38 am UTC
Forum: Science
Topic: Ziploc bags in Microwaves
Replies: 11
Views: 2415

### Re: Ziploc bags in Microwaves

PV=nRT
Mon Dec 22, 2008 8:16 pm UTC
Forum: Science
Topic: Really bitter substance
Replies: 4
Views: 861

### Re: Really bitter substance

Dominance of a trait has nothing to do with its prevalence in the gene pool.

Huntington's is dominant after all, and blue eyes are recessive, but we see plenty of blue eyes and not that much huntington's.

Just a reminder.
Sat Nov 29, 2008 12:30 pm UTC
Forum: Science
Topic: Good medical podcast/blog?
Replies: 3
Views: 736

### Re: Good medical podcast/blog?

If you can find a bootlegged copy of Goljin's review lectures on the net, those are excellent med lectures.
Mon Nov 24, 2008 1:12 pm UTC
Forum: Science
Topic: Acquired Traits question
Replies: 10
Views: 1382

### Re: Acquired Traits question

Some cultures that did not have exposure to alcohol to select for/have founder populations can not have as efficient aldehyde dehydrogenase as white irish drunks (such as myself). This is why you see so few (comparatively) alcoholic japanese. Without an efficient enzyme to get rid of the toxins that...
Tue Nov 18, 2008 7:10 am UTC
Forum: Science
Topic: Standard units in America?
Replies: 136
Views: 12137

### Re: Standard units in America?

I didn't see anyone mention it, and I'm surprised. There's a very real problem with the metric system when it comes to the real world. You have a table 1 meter long, and now you need to measure a third of it. Oh craps, not a real measurable number. Sure, you can get it to within approximations, but ...
Fri Nov 07, 2008 1:45 am UTC
Forum: Science
Replies: 5
Views: 733

Holy shit! My research! It lives!

(This was my thesis, not this paper, but using 50 picomolar solutions and exciting one femtoliter with a confocal microscope.)

Woot!
Mon Oct 27, 2008 12:28 pm UTC
Forum: Science
Topic: Can allergy be cured by bone marrow transplant?
Replies: 17
Views: 4465

### Re: Can allergy be cured by bone marrow transplant?

Because worm parasites are a totally legit threat in the modern world. If exposed, I guarantee we have no immunity against them, IgE or not. It's a tough fight for us either way. Worms, Wheezes, and Weird Diseases are all things we can do without or avoid easily enough. I'd say IgE's cancer protecti...
Sun Oct 26, 2008 2:11 am UTC
Forum: Science
Topic: Strength of Ceiling Joists
Replies: 5
Views: 1062

### Re: Strength of Ceiling Joists

Assume that the pumpkin cannot be dislodged in any way, shape, or form.

If that isn't the difference between math/physics majors and engineers, I don't know what is.
Fri Oct 24, 2008 10:07 pm UTC
Forum: Science
Topic: Can allergy be cured by bone marrow transplant?
Replies: 17
Views: 4465

### Re: Can allergy be cured by bone marrow transplant?

Omalizumab
http://en.wikipedia.org/wiki/Omalizumab

Also see omalizumab related teh cancers.
Mon Oct 20, 2008 1:51 am UTC
Forum: Science
Topic: The Black Death != Bubonic Plague?
Replies: 27
Views: 5045

### Re: The Black Death != Bubonic Plague?

Yersina pestis is a respiratory plague. The way we think it progressed and still see it present in the southwestern US is that someone gets bit by a flea, they get the classic buboes (swollen blackened lymph nodes in armpit/groin, etc), then if the disease progresses to its pneumonic phase, they bec...
Thu Sep 25, 2008 2:21 am UTC
Topic: Alternative Medicine, Psuedoscience, etc.
Replies: 255
Views: 37496

### Re: Alternative Medicine, Psuedoscience, etc.

If this isn't the essence of science, I don't know what is.

Everything else is just bookkeeping.
Tue Sep 23, 2008 3:35 am UTC
Forum: Science
Topic: What to use in the opposite of an energy drink?
Replies: 46
Views: 5440

### Re: What to use in the opposite of an energy drink?

Check the medical literature, gmal, there is actually a (to me) impressive bit of evidence that for chronic pain and nausea, acupuncture may be just as good as conventional treatment and better then sham or no treatment.... I mean, we've had this discussion before, but the Cochrane Reviews (medical ...
Mon Sep 22, 2008 10:50 am UTC
Forum: Science
Topic: What to use in the opposite of an energy drink?
Replies: 46
Views: 5440

### Re: What to use in the opposite of an energy drink?

Me thinks you mean melatonin (mentioned above) and not melanin. Melanin is a pigment, melatonin comes from the suprachiasmaticnucleus and regulates circadian rhythm.
Mon Sep 22, 2008 4:40 am UTC
Forum: Science
Topic: What to use in the opposite of an energy drink?
Replies: 46
Views: 5440

### Re: What to use in the opposite of an energy drink?

Alcohol in any dose is a crappy sedative. It does its job of getting you to sleep (decreases sleep latency, or decreases level 0 sleep) but it affects the pattern of REM/sleep staging such that you don't sleep physiologically. This is especially true at higher doses, where the 2nd half of the night'...
Fri Sep 19, 2008 2:40 am UTC
Forum: Science
Topic: What to use in the opposite of an energy drink?
Replies: 46
Views: 5440

### Re: What to use in the opposite of an energy drink?

I like the idea of valarian root, I'm not a fan of diphenhydramine for sleeping pills. In kids it's...ok...I guess...but it dries people out something horrible, and I can't stand the feeling of it. Melatonin pills work for some people, may or may not be entirely placebo.... Alcohol is a shitty sedat...
Sun Sep 14, 2008 3:10 pm UTC
Forum: Science
Topic: Hackable Implants?
Replies: 18
Views: 2329

### Re: Hackable Implants?

Pacemakers are usually designed to fire if the heart is beating too slow, they have a maximum rate that you can see if you turn it up too high, or the heart outpaces the pacemaker. I guess you'd have to either secretly run it out, or make it set up an arrhythmia or AV junctional cylcle. ICDs could ...