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keiths Posts: 2195 Joined: Jan. 2006 (Permalink) Posted: Feb. 17 2011,21:45    Hudson River fish resist PCBs through gene variant Quote Because the tomcod is resistant to the toxic effects of PCBs they are able to accumulate the industrial chemical in larger amounts than nonresistant creatures without becoming ill or dying, explained Wirgin. His findings were reported Thursday in the online edition of the journal Science. The resistance is provided by a variant in a single gene that prevents the chemical from binding onto cells in the fish, Wirgin explained. That variant, he said, is found in about 95 percent of the tomcod in the Hudson. It appears in about 5 percent of tomcod in two smaller streams in Connecticut and on Long Island, and "if you go further from the Hudson you don't see it at all." ...Pollution of the Hudson by PCBs is traced to 1947 and continued for 30 years before being banned. During that period, General Electric Co. plants discharged an estimated 1.3 million pounds of PCBs into the river. Cleanup is continuing. -------------- And the set of natural numbers is also the set that starts at 0 and goes to the largest number. -- Joe G Please stop putting words into my mouth that don't belong there and thoughts into my mind that don't belong there. -- KF

Henry J Posts: 5786 Joined: Mar. 2005 (Permalink) Posted: Feb. 18 2011,09:11    Quote On H/D substitution neither shape nor polarity change noticeably, but the hydrogen bonds involving deuterium could indeed vary in energy from those based on normal hydrogen. Really? I thought I read someplace that the angle in a water molecule was different with D's than with H's.

midwifetoad Posts: 4003 Joined: Mar. 2008 (Permalink) Posted: Feb. 18 2011,21:51    Classic Selective Sweeps Were Rare in Recent Human Evolution http://www.sciencemag.org/content....78b4aee -------------- Any version of ID consistent with all the evidence is indistinguishable from evolution.

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Feb. 23 2011,19:26    http://www.biology-direct.com/content/pdf/1745-6150-6-14.pdf Origin of the genetic code, stereochemical hypothesis yada yada blah blah blah... Exactly what Stephen Meyer is pretending doesn't exist in Signature in the Cell. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

Dr.GH Posts: 2333 Joined: May 2002 (Permalink) Posted: Feb. 24 2011,10:54    Quote (dvunkannon @ Feb. 23 2011,17:26) http://www.biology-direct.com/content/pdf/1745-6150-6-14.pdf Origin of the genetic code, stereochemical hypothesis yada yada blah blah blah... Exactly what Stephen Meyer is pretending doesn't exist in Signature in the Cell. Quote Conclusion: Taken together, our findings necessarily imply that primordial tRNAs, tRNA aminoacylating ribozymes, and (later) the translation machinery in general have been co-evolving to ‘‘fit’’ the (likely already defined) genetic code, rather than the opposite way around. What? -------------- "Science is the horse that pulls the cart of philosophy." L. Susskind, 2004 "SMOLIN VS. SUSSKIND: THE ANTHROPIC PRINCIPLE"

Henry J Posts: 5786 Joined: Mar. 2005 (Permalink) Posted: Feb. 24 2011,15:08    Quote Astronauts In Astrovan Heading to Launch Pad Thu, 24 Feb 2011 11:04:56 AM MST The six astronauts of STS-133 are riding in the Astrovan headed to Launch Pad 39A. The countdown is proceeding smoothly this afternoon for a liftoff at 4:50 p.m. EST. Weather forecasters call for a 90 percent chance of acceptable conditions at launch time. For continuous coverage of the countdown, check out NASA's launch blog at http://www.nasa.gov/mission_pages/shuttle/launch/launch_blog.html

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Feb. 26 2011,22:20    Quote (Dr.GH @ Feb. 24 2011,11:54) Quote (dvunkannon @ Feb. 23 2011,17:26) http://www.biology-direct.com/content/pdf/1745-6150-6-14.pdf Origin of the genetic code, stereochemical hypothesis yada yada blah blah blah... Exactly what Stephen Meyer is pretending doesn't exist in Signature in the Cell. Quote Conclusion: Taken together, our findings necessarily imply that primordial tRNAs, tRNA aminoacylating ribozymes, and (later) the translation machinery in general have been co-evolving to ‘‘fit’’ the (likely already defined) genetic code, rather than the opposite way around. What? Good question. The paper has some hefty ESL problems. I think they mean that the code (or parts of it) are defined stereochemically, and that the development of the tRNA mechanisms are constrained by this. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Feb. 26 2011,22:24    From the News (to me) Dept. Energy density of lasers could cause virtual particles to be created, thus disrupting the laser - aka there is a limit to attainable energy densities. http://theastronomist.fieldofscience.com/2010/08/limits-on-lasers.html Might be useful for beating creationists (like StephenB) over the head with when they start bleating objections to virtual particles. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

Henry J Posts: 5786 Joined: Mar. 2005 (Permalink) Posted: Feb. 27 2011,18:04    Quote Might be useful for beating creationists (like StephenB) over the head with when they start bleating objections to virtual particles. They'd probably just proceed to claim that the Intelligent Designer used LASERs to implement the designs. Henry

Richardthughes Posts: 11178 Joined: Jan. 2006 (Permalink) Posted: Mar. 01 2011,13:58    http://b3ta.com/challenge/kittenscience/popular/ -------------- "Richardthughes, you magnificent bastard, I stand in awe of you..." : Arden Chatfield "You magnificent bastard! " : Louis "ATBC poster child", "I have to agree with Rich.." : DaveTard "I bow to your superior skills" : deadman_932 "...it was Richardthughes making me lie in bed.." : Kristine

OgreMkV Posts: 3668 Joined: Oct. 2009 (Permalink) Posted: Mar. 06 2011,08:03    Alien Life in Meteorites?  A new report was published online late Friday night. My blog has a report and links to the original article and popular treatment at Yahoo. Original Report (for us hard corer science geeks) -------------- Ignored by those who can't provide evidence for their claims. http://skepticink.com/smilodo....retreat

OgreMkV Posts: 3668 Joined: Oct. 2009 (Permalink) Posted: Mar. 06 2011,09:29    And PZ slaps it down here: http://scienceblogs.com/pharyng....ter.php -------------- Ignored by those who can't provide evidence for their claims. http://skepticink.com/smilodo....retreat

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Mar. 09 2011,14:53    http://www.the-scientist.com/news/display/58044/ Big brains and spineless penises How DNA deletions may have produced uniquely human traits Cue the pen15 jokes in 3, 2,... -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Mar. 18 2011,12:26    A very readable review article on transposable elements and their role in evolution. http://www.biology-direct.com/content/pdf/1745-6150-6-19.pdf Does anyone have a good recent article on the subject of virus-bacteria competition as a driver of early evolution (2-3 Gya)? Many thanks! -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Mar. 18 2011,15:06    http://www.the-scientist.com/news/display/58057/ A new article based on the Lenski E.coli studies. Sure to incite the masses at UD! -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

Richardthughes Posts: 11178 Joined: Jan. 2006 (Permalink) Posted: Mar. 18 2011,15:37    no doubt " long-term evolvability" will equal front-loading for them. Somehow. -------------- "Richardthughes, you magnificent bastard, I stand in awe of you..." : Arden Chatfield "You magnificent bastard! " : Louis "ATBC poster child", "I have to agree with Rich.." : DaveTard "I bow to your superior skills" : deadman_932 "...it was Richardthughes making me lie in bed.." : Kristine

keiths Posts: 2195 Joined: Jan. 2006 (Permalink) Posted: Mar. 22 2011,19:37    Religion may become extinct in nine nations, study says Quote A study using census data from nine countries shows that religion there is set for extinction, say researchers. The study found a steady rise in those claiming no religious affiliation. The team's mathematical model attempts to account for the interplay between the number of religious respondents and the social motives behind being one. The result, reported at the American Physical Society meeting in Dallas, US, indicates that religion will all but die out altogether in those countries. -------------- And the set of natural numbers is also the set that starts at 0 and goes to the largest number. -- Joe G Please stop putting words into my mouth that don't belong there and thoughts into my mind that don't belong there. -- KF

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Mar. 22 2011,19:42    http://www.sciencedaily.com/releases/2011/03/110321161904.htm Re-analysis of another Miller experiment, this time from 1958, yields more rich amino acid mixtures. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

Henry J Posts: 5786 Joined: Mar. 2005 (Permalink) Posted: Mar. 22 2011,22:21    Ah, but how much information is in those mixtures!!111!!!eleven!!!

Steverino Posts: 411 Joined: Oct. 2005 (Permalink) Posted: Mar. 24 2011,07:27    Gerneal question I was sent in response to humam chromosome 2: Quote Honestly ... is there any similar two species ... with the same 99% gene relation such as the man-chimp ... with one having a combined chromosomes 6 or 8 or whatever ... there must be evidence that combination of chromosomes can lead to evolutionary speciation. Because as far what I know; combining genes results to two things only. Anyone? -------------- - Born right the first time. - Asking questions is NOT the same as providing answers. - It's all fun and games until the flying monkeys show up!

Louis Posts: 6436 Joined: Jan. 2006 (Permalink) Posted: Mar. 24 2011,07:36    Quote (Henry J @ Mar. 23 2011,04:21) Ah, but how much information is in those mixtures!!111!!!eleven!!! 2. I defy any IDCist to demonstrate my calculation of the quantity of information in the mixtures is wrong. Louis -------------- Bye.

OgreMkV Posts: 3668 Joined: Oct. 2009 (Permalink) Posted: Mar. 24 2011,09:28    Quote (Steverino @ Mar. 24 2011,07:27) Gerneal question I was sent in response to humam chromosome 2:   Quote Honestly ... is there any similar two species ... with the same 99% gene relation such as the man-chimp ... with one having a combined chromosomes 6 or 8 or whatever ... there must be evidence that combination of chromosomes can lead to evolutionary speciation. Because as far what I know; combining genes results to two things only. Anyone? I don't think enough species have been sequenced yet to be able to answer that. I'd think that the condition is at least somewhat rare, but that's based on a very limited sample size.  Two chromosomes have to combine in such a way that both retain their (hah) information and (double hah) functionality.   It could be an extremly rare thing, it could be common.   Honestly, though, it doesn't matter.  It happened once and there are many pieces of evidence to support that.  So, we know it can happen.  That supports common descent and effectively disproves special creation of humans. -------------- Ignored by those who can't provide evidence for their claims. http://skepticink.com/smilodo....retreat

Erasmus, FCD Posts: 6349 Joined: June 2007 (Permalink) Posted: Mar. 24 2011,09:55    hard to understand if the question doesn't mistake genes for chromosomes or what.  evolution along chromosomes at least in theory can partly explain some speciation events i think everyone can see this one http://www.hummingbirds.arizona.edu/Courses....001.pdf this one has good refs http://www.indiana.edu/~ensiweb/chrom.spec.html -------------- You're obviously illiterate as hell. Peach, bro.-FtK Finding something hard to believe based on the evidence, is science.-JoeG the odds of getting some loathsome taint are low-- Gordon E Mullings Manjack Heights Montserrat I work on molecular systems with pathway charts and such.-Giggles

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Mar. 24 2011,13:11    Quote (Steverino @ Mar. 24 2011,08:27) Gerneal question I was sent in response to humam chromosome 2:   Quote Honestly ... is there any similar two species ... with the same 99% gene relation such as the man-chimp ... with one having a combined chromosomes 6 or 8 or whatever ... there must be evidence that combination of chromosomes can lead to evolutionary speciation. Because as far what I know; combining genes results to two things only. Anyone? I agree with OgreMkV, with the caveat that you can see the possible fusion site at the "banding of the chromosome" level of analysis, you don't need fully sequenced genomes. Then sequence just the apparent fusion site and look for the mirrored telomere sequences. There was a recent UD post on "interstitial telomeric sequences". Googling that phrase, "Robertsonian translocation", and "chromosome fusion" got some interesting hits. Some assert that fusion is common. Maybe it is. Robertsonian translocation seems to happen frequently in humans, 1 of 1000 live births. While the chimp 2a and 2b chromosomes look like candidates for Robertsonian translocation due to their long/short arms, the fusion that separates humans from chimps is not Robertsonian, because the short arms survived the fusion. However, your correspondent may be lumping the categories together as evidenced by the last sentence. The point of the UD post was that there are a lot of ITS sites inside the human genome. A good number are associated with inversions, which makes sense. If the end of a chromosome breaks off, flips around and reattaches, you get an inversion with associated ITS, assuming the end gets a new telomere and you survive. That is not completely relevant to the situation at the fusion site, which has a mirrored ITS. Bottom line: the fusion of 2a and 2b preserved all genetic material. Other common fusion types, such as Robertsonian translocation, do not. Humans rarely mate with close relatives. Other primates may, given their close social groups. So a need to "marry your sister" to make a fusion event viable is not insurmountable. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: Mar. 31 2011,13:17    http://www.scientificamerican.com/article....roteins A nice article in the print edition of SciAm on proteins that don't need to fold completely to show function. There is a section towards the end of the article on evolution and how unfolded proteins could have been functional in early life. Makes the point that light, hydrophilic AAs seem to have entered the genetic code early, and these are the AAs that show up preferentially in in unfolded proteins. Conclusion is that unfolded proteins could have been catalytic in the RNA World. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

fnxtr Posts: 3504 Joined: June 2006 (Permalink) Posted: April 01 2011,09:08    Bwahahaha! The best part is the comments section, a veritable Poe-puree.  :-) -------------- "[A] book said there were 5 trillion witnesses. Who am I supposed to believe, 5 trillion witnesses or you? That shit's, like, ironclad. " -- stevestory "Wow, you must be retarded. I said that CO2 does not trap heat. If it did then it would not cool down at night."  Joe G

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: April 02 2011,21:34    http://www.sciencedaily.com/releases/2011/03/110330131310.htm In silico, whole cell simulation. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

REC Posts: 638 Joined: Sep. 2006 (Permalink) Posted: April 05 2011,15:28    I'm not sure if this was posted here yet (I had missed it!): Experimental support for the evolution of symmetric protein architecture from a simple peptide motif Jihun Lee and Michael Blaber (2011) PNAS  108(1):126-13 doi: 10.1073/pnas.1015032108       Quote The majority of protein architectures exhibit elements of structural symmetry, and “gene duplication and fusion” is the evolutionary mechanism generally hypothesized to be responsible for their emergence from simple peptide motifs. Despite the central importance of the gene duplication and fusion hypothesis, experimental support for a plausible evolutionary pathway for a specific protein architecture has yet to be effectively demonstrated. To address this question, a unique “top-down symmetric deconstruction” strategy was utilized to successfully identify a simple peptide motif capable of recapitulating, via gene duplication and fusion processes, a symmetric protein architecture (the threefold symmetric ?-trefoil fold). The folding properties of intermediary forms in this deconstruction agree precisely with a previously proposed “conserved architecture” model for symmetric protein evolution. Furthermore, a route through foldable sequence-space between the simple peptide motif and extant protein fold is demonstrated. These results provide compelling experimental support for a plausible evolutionary pathway of symmetric protein architecture via gene duplication and fusion processes. Great support for the idea that longer peptides with complex folds may have evolved from shorter peptides with simple folds. The symmetry around protein motifs we see indicates molecular fossils of simpler translation motifs, or folding units. And each step of gene duplication and fusion seems thermodynamically viable-showing a putative evolutionary path. Needless to say, the big big numbers crowd won't like this.

Henry J Posts: 5786 Joined: Mar. 2005 (Permalink) Posted: April 06 2011,10:00    Big big numbers crowd? And here I thought those guys didn't like numbers much larger than 6000 or so...

dvunkannon Posts: 1377 Joined: June 2008 (Permalink) Posted: April 06 2011,14:49    http://www.the-scientist.com/news/display/58105/ Retinas from Stem Cells Actual article is in Nature. We were talking about eye development recently on another thread, and I hypothesized that simple differential growth rates on one side or the other of a film would bow it inward to form an optical cup, or outward as in the arthropod eye. So it was nice to see this Quote "Certain mechanical forces were involved to shape the cup," Tsonis said, but the details of that process are still unclear. -------------- I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

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