Post List

  • August 23, 2010
  • 08:40 AM

Sex role-reversed pipefish and the possibility of cryptic male choice

by Graves in Down the Cellar

Sexual selection exists because of anisogamy: females produce only a few, large gametes while males produce a greater number of small gametes. Because females invest more, and because their productivity is not usually limited by the availability of male gametes, females should be the choosy sex. Males, on the other hand, can increase their own reproductive success by simply tacking on additional ... Read more »

  • August 23, 2010
  • 08:35 AM

Dispersants! Part II: Toxicity

by Holly Bik in Deep Sea News

Part II:  How toxic are dispersants?
This, I suppose, is the million-dollar question.  The EPA has continually insisted that the actual dispersants is less toxic than dispersed oil.  Ok, oil is full of some pretty nasty compounds, and the studies do in fact back up this claim.  If you spray Corexit on some shrimp, and then spray . . . → Read More: Dispersants! Part II: Toxicity... Read more »

  • August 23, 2010
  • 08:00 AM

Teaching people about pain – a kind of position paper

by Lorimer Moseley in BodyInMind

Some time ago, I wrote this paper, at the request of the journal Physical Therapy Reviews, on reconceptualising pain. It is a little old now but it has come to be a bit of a position paper. The position has four fundamentals, none of which will be very surprising to anyone I imagine: (i) pain [...]... Read more »

  • August 23, 2010
  • 08:00 AM

Which Protein Fills You Up Most?

by Arya M. Sharma in Dr. Sharma's Obesity Notes

Dietary proteins have been shown to be more effective at prolonging satiety and suppressing food intake than carbohydrates and fats. However, different dietary proteins appear to vary in their ability to influence satiety and reduce food intake.
This is nicely demonstrated in a new study by Sebely Pal and Vanessa Ellis from the University of Curtin, Perth, Australia, [...]... Read more »

  • August 23, 2010
  • 07:50 AM

The double-edged sword of Damocles

by Becky in It Takes 30

Apoptosis is everywhere: it formed the spaces between your fingers and toes as you developed in utero, it prevents the development of T cells that would attack the cells of your body, and it shapes the structure of your brain.  Too little apoptosis can cause cancer; over-zealous apoptosis causes much of the damage in a [...]... Read more »

Tait SW, Parsons MJ, Llambi F, Bouchier-Hayes L, Connell S, Muñoz-Pinedo C, & Green DR. (2010) Resistance to caspase-independent cell death requires persistence of intact mitochondria. Developmental cell, 18(5), 802-13. PMID: 20493813  

  • August 23, 2010
  • 07:40 AM

A thousand little adaptive platoons

by Razib Khan in Gene Expression

Last week I took an intellectual road trip back nearly a century and explored the historical context and scientific logic by which R. A. Fisher definitively fused Mendelian genetics with quantitative evolutionary biology. In the process he helped birth the field of population genetics. While the genetics which we today are more familiar with begins at [...]... Read more »

Sewall Wright. (1932) The roles of mutation, inbreeding, crossbreeding and selection in evolution. Proceedings of The Sixth International Congress of Genetics. info:/

  • August 23, 2010
  • 07:00 AM

New Wood-Warbler Taxonomy

by slybird in Biological Ramblings

The July issue of The Auk contained the AOU North American Checklist Committee's 51st supplement to the AOU checklist (pdf), a variety of splits and changes to taxonomy at the genus level and higher. Sibley handily summarizes the name changes to North American species, and Michael Retter reviews the whole supplement, and I'm sure it has been plastered elsewhere on the blogosphere by now so I am not going into a full review here (plus, I blogged about one of the splits two years ago - everyone el........ Read more »

Lovette, I., Pérez-Emán, J., Sullivan, J., Banks, R., Fiorentino, I., Córdoba-Córdoba, S., Echeverry-Galvis, M., Barker, F., Burns, K., & Klicka, J. (2010) A comprehensive multilocus phylogeny for the wood-warblers and a revised classification of the Parulidae (Aves). Molecular Phylogenetics and Evolution. DOI: 10.1016/j.ympev.2010.07.018  

  • August 23, 2010
  • 06:00 AM

Article Review: Use of Effective Questioning

by Michelle Lin in Academic Life In Emergency Medicine

Asking effective questions is a valuable skill for any teacher. As a junior faculty member working to improve my teaching, I'm often in awe of my more experienced colleagues when I have the chance to watch them teach. At times, it's quite easy to pick out the skills that they put into action but occasionally, their expertise is much more subtle.Effective questioning falls into this category.It is fair to say that educators use questioning skills in every teaching encounter. Problem is, we ofte........ Read more »

Sachdeva AK. (1996) Use of effective questioning to enhance the cognitive abilities of students. Journal of cancer education : the official journal of the American Association for Cancer Education, 11(1), 17-24. PMID: 8777151  

  • August 23, 2010
  • 05:47 AM

Overlooking the familiar in cataloging biodiversity

by Madhu in Reconciliation Ecology


Familiarity, they say, breeds contempt. Or, even if we aren't actually contemptuous of the familiar, we often simply ignore it. It is not surprising, then—although it should...

... Read more »

  • August 23, 2010
  • 05:30 AM

Walking and cycling to work prevents obesity?

by Yoni Freedhoff in Weighty Matters

Hmmm.I'll admit up front that I can't access the full text of the article Walking and Cycling to Health: A Comparative Analysis of City, State, and International Data, so I can't comment on methodology.The study was large in that it looked at 14 countries, all 50 US states and 50 of the largest US cities for a relationship between active transportation (walking and cycling to work) and obesity.The abstract (and the media) strongly suggest that walking and cycling to work helps to prevent obesity........ Read more »

  • August 23, 2010
  • 05:22 AM

Overlooking the familiar in cataloging biodiversity

by Madhusudan Katti in a leafwarbler's gleanings

Familiarity, they say, breeds contempt. Or, even if we aren't actually contemptuous of the familiar, we often simply ignore it. It is not surprising, then—although it should be—that Tapinoma sessile, the odorous house ant of North America, the very same little brown one that is pictured above, and that you may well have swept off your kitchen counter today, remains relatively poorly studied! It is so widespread and common across a variety of habitats in ........ Read more »

  • August 23, 2010
  • 05:14 AM

Who drops out of CBT for chronic pain?

by Bronwyn Thompson in Healthskills: Skills for Healthy Living

Wouldn’t it be wonderful if everyone we saw was ready for self management and committed to putting everything in place? Wouldn’t it be even better if we could tell who was and who wasn’t going to drop out? Then we could focus treatment on people who were ready for treatment, and help those who are … Read more... Read more »

Glombiewski, J A, Hartwich-Tersek, J, & Rief,W. (2010) Attrition in Cognitive-behavioral Treatment of Chronic Back Pain. Clinical Journal of Pain, 26(7), 593-601. info:/

  • August 23, 2010
  • 04:29 AM

Flynn effect for memory could invalidate neuropsychologists' tests

by BPS Research Digest in BPS Research Digest

In Western countries, scores on IQ tests have been rising for several decades - the Flynn effect, named after the political scientist James Flynn. Now Sallie Baxendale at the Institute of Neurology has provided evidence that a similar effect has occurred for the standardised memory tests that are used by clinical neuropsychologists, a finding with implications for the diagnosis of memory problems in contemporary patients.

Baxendale focused on the Adult Memory and Information Processing Battery ........ Read more »

Baxendale, S. (2010) The Flynn effect and memory function. Journal of Clinical and Experimental Neuropsychology, 32(7), 699-703. DOI: 10.1080/13803390903493515  

  • August 23, 2010
  • 02:46 AM

Measuring the Bullwhip Effect in Supply Chains

by Daniel Dumke in SCRM Blog - Supply Chain Risk Management

The bullwhip effect in supply chains has been around for some time now. The term "bullwhip effect" originated at Procter & Gamble, and is defined as: demand amplification across echelons within a supply chain. This describes the effect that end customer demand may be very static (as for "Pampers" by Procter & Gamble), but the demand experienced by the manufacturer or supplier shows amplified demand variations. (Fransoo and Wouters (2000))

Causes of the Bullwhip Effect
Lee et al. (1........ Read more »

Fransoo, J., & Wouters, M. (2000) Measuring the bullwhip effect in the supply chain. Supply Chain Management: An International Journal, 5(2), 78-89. DOI: 10.1108/13598540010319993  

  • August 22, 2010
  • 07:40 PM

PLoS ONE: Children from Wealthier Families More Likely to Meet Criteria for an ASD

by Lindsay in Autist's Corner

Describes research analyzing 2002-2004 autism prevalence data cross-referenced with socioeconomic data from the 2000 census on the geographic areas under surveillance in the autism-prevalence studies. My post also addresses to what extent these results show a link between autism and SES independent of wealthier families' greater access to health-care services.... Read more »

  • August 22, 2010
  • 06:31 PM

Meet the New Dogfish, Same as the Old Dogfish

by Chuck in Ya Like Dags?

Recently Will over at Bomai Cruz posed the question, “what determines a species?“  This is a relevant question for spiny dogfish research, since much of what is currently known about Squalus acanthias comes from work on the very well-studied north … Continue reading →... Read more »

  • August 22, 2010
  • 05:29 PM

Addicted to Love

by Shaheen Lakhan in Brain Blogger

Robert Palmer may have already known what researchers now claim: Love can be an addiction. In a new study published in the American Journal of Drug and Alcohol Abuse, investigators examined and compared the clinical, psychological and biological details of love, passion, gambling, and substance dependence. It turns out that an addiction to love is [...]... Read more »

Curtis JT, Liu Y, Aragona BJ, & Wang Z. (2006) Dopamine and monogamy. Brain research, 1126(1), 76-90. PMID: 16950234  

Fisher HE, Aron A, & Brown LL. (2006) Romantic love: a mammalian brain system for mate choice. Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 361(1476), 2173-86. PMID: 17118931  

Reynaud M, Karila L, Blecha L, & Benyamina A. (2010) Is Love Passion an Addictive Disorder?. The American journal of drug and alcohol abuse. PMID: 20545601  

Sophia EC, Tavares H, Berti MP, Pereira AP, Lorena A, Mello C, Gorenstein C, & Zilberman ML. (2009) Pathological love: impulsivity, personality, and romantic relationship. CNS spectrums, 14(5), 268-74. PMID: 19407726  

Young LJ, Murphy Young AZ, & Hammock EA. (2005) Anatomy and neurochemistry of the pair bond. The Journal of comparative neurology, 493(1), 51-7. PMID: 16255009  

  • August 22, 2010
  • 02:31 PM

Nanofibre paint that kills MRSA

by Lab Rat in Lab Rat

MRSA, the antibiotic resistant form of Staphylococcus aureus is a major problem in hospitals. The antibiotic resistance makes it hard to erradicate, not just from patients, but in the surounding environment, on surfaces, on medical equipment, on the walls of the hospital. In order to minimise the numbers of dangerous bacteria found in hospital surroundings, quite a lot of research has gone into creating antibacterial coverings or coatings that would reduce the number of bacteria p. Currently how........ Read more »

Pangule RC, Brooks SJ, Dinu CZ, Bale SS, Salmon SL, Zhu G, Metzger DW, Kane RS, & Dordick JS. (2010) Antistaphylococcal nanocomposite films based on enzyme-nanotube conjugates. ACS nano, 4(7), 3993-4000. PMID: 20604574  

  • August 22, 2010
  • 11:31 AM

Sinus infections: what we do and don’t know

by PalMD in White Coat Underground

Acute sinusitis—a “sinus infection”—is one of the most common problems seen by primary care physicians.  The current preferred terminology is “acute rhinosinusitis”, a term which is more descriptive of how the disease works (its “etiology”).  In most cases, a patient will first develop cold or allergy symptoms including a runny, congested nose (“rhinitis”).  The swelling [...]... Read more »

Hickner JM, Bartlett JG, Besser RE, Gonzales R, Hoffman JR, Sande MA, American Academy of Family Physicians, American College of Physicians-American Society of Internal Mediciine, Centers for Disease Control, & Infectious Diseases Society of America. (2001) Principles of appropriate antibiotic use for acute rhinosinusitis in adults: background. Annals of internal medicine, 134(6), 498-505. PMID: 11255528  

Snow V, Mottur-Pilson C, Hickner JM, American Academy of Family Physicians, American College of Physicians-American Society of Internal Medicine, Centers for Disease Control, & Infectious Diseases Society of America. (2001) Principles of appropriate antibiotic use for acute sinusitis in adults. Annals of internal medicine, 134(6), 495-7. PMID: 11255527  

  • August 22, 2010
  • 06:00 AM

Evolution of Colour Terms: 6 Categorisation Constraints

by Sean Roberts in A Replicated Typo 2.0

Continuing my series on the Evolution of Colour terms, this post reviews evidence for categorisation constraints on colour perception. For the full dissertation and for references, go here.

This section reviews the conflicting evidence for ability of linguistic categories to affect perception, which is crucial for the Cultural implication.  Studies of Embodied Cognition which found evidence . . . → Read More: Evolution of Colour Terms: 6 Categorisation Constraints... Read more »

Kay, P., & Kempton, W. (1984) What Is the Sapir-Whorf Hypothesis?. American Anthropologist, 86(1), 65-79. DOI: 10.1525/aa.1984.86.1.02a00050  

Hansen, T., Olkkonen, M., Walter, S., & Gegenfurtner, K. (2006) Memory modulates color appearance. Nature Neuroscience, 9(11), 1367-1368. DOI: 10.1038/nn1794  

Winawer, J., Witthoft, N., Frank, M., Wu, L., Wade, A., & Boroditsky, L. (2007) Russian blues reveal effects of language on color discrimination. Proceedings of the National Academy of Sciences, 104(19), 7780-7785. DOI: 10.1073/pnas.0701644104  

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