Arachidonic acid. The very word makes most nutritionists cringe. Many of us are taught to avoid it like the plague. Americans have developed an egg-phobia because of it (the misinterpretations of egg research will be reviewed in a later post). How can something that biochemically competes with our beloved omega 3s be good for [...]... Read more »
Ishikura Y, Ikeda G, Akimoto K, Hata M, Kusumoto A, Kidokoro A, Kontani M, Kawashima H, Kiso Y, & Koga Y. (2009) Arachidonic Acid Supplementation Decreases P300 Latency and Increases P300 Amplitude of Event-Related Potentials in Healthy Elderly Men. Neuropsychobiology, 60(2), 73-79. PMID: 19752581
Only study of its kind to look at how to diagnose and treat this fairly uncommon sports injury... Read more »
Bhatia DN, de Beer JF, van Rooyen KS, Lam F, & du Toit DF. (2007) The "bench-presser's shoulder": an overuse insertional tendinopathy of the pectoralis minor muscle. British journal of sports medicine, 41(8). PMID: 17138640
Borstad, J., & Ludewig, P. (2006) Comparison of three stretches for the pectoralis minor muscle. Journal of Shoulder and Elbow Surgery, 15(3), 324-330. DOI: 10.1016/j.jse.2005.08.011
Ebinger, N., Magosch, P., Lichtenberg, S., & Habermeyer, P. (2008) A New SLAP Test: The Supine Flexion Resistance Test. Arthroscopy: The Journal of Arthroscopic , 24(5), 500-505. DOI: 10.1016/j.arthro.2007.11.017
KIM, S., HA, K., AHN, J., KIM, S., & CHOI, H. (2001) Biceps load test II: A clinical test for SLAP lesions of the shoulder. Arthroscopy: The Journal of Arthroscopic , 17(2), 160-164. DOI: 10.1053/jars.2001.20665
Shanley KJ, Green RA, & Taylor NF. (2008) An evaluation of the anatomical basis of the Biceps Load tests I and II for superior labral anterior and posterior (SLAP) lesions. Clinical anatomy (New York, N.Y.), 21(7), 647-51. PMID: 18773481
Munro W, & Healy R. (2009) The validity and accuracy of clinical tests used to detect labral pathology of the shoulder--a systematic review. Manual therapy, 14(2), 119-30. PMID: 18996735
Green RA, Taylor NF, Mirkovic M, & Perrott M. (2008) An evaluation of the anatomic basis of the O'Brien active compression test for superior labral anterior and posterior (SLAP) lesions. Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons .. [et al.], 17(1), 165-71. PMID: 17936025
Mechelli F, Preboski Z, & Boissonnault WG. (2008) Differential diagnosis of a patient referred to physical therapy with low back pain: abdominal aortic aneurysm. The Journal of orthopaedic and sports physical therapy, 38(9), 551-7. PMID: 18758044
Around 2600 years ago in Egypt, a woman called Irtyersenu died. She was mummified and buried at the necropolis at Thebes, where she remained for over two millennia before being unearthed in 1819. Her well-preserved body was brought to the British Museum where it was examined by the physician and obstetrician Augustus Bozzi Granville. It was the first ever medical autopsy of an Egyptian mummy and Granville presented his results to the Royal Society in 1825. His conclusion: Ityersenu died of ovari........ Read more »
Donoghue, H., Lee, O., Minnikin, D., Besra, G., Taylor, J., & Spigelman, M. (2009) Tuberculosis in Dr Granville's mummy: a molecular re-examination of the earliest known Egyptian mummy to be scientifically examined and given a medical diagnosis. Proceedings of the Royal Society B: Biological Sciences. DOI: 10.1098/rspb.2009.1484
“Progress” and “evolution” are inextricably linked in many people’s minds. Evolution is always moving forward. From molecules to cells to invertebrates to vertebrates; from fish to reptiles to mammals to us. There’s a lot wrong with those ideas, but the underlying question is worth asking: Can organisms go back the way they came?
Louis Dollo thought not. He suggested that once a feature was lost in a lineage, it could never be regained. Enough people agreed with this suggestion th........ Read more »
Bridgham, J., Ortlund, E., & Thornton, J. (2009) An epistatic ratchet constrains the direction of glucocorticoid receptor evolution. Nature, 461(7263), 515-519. DOI: 10.1038/nature08249
Lynch, V., & Wagner, G. (2009) Did egg-laying boas break Dollo's Law? Phylogenetic evidence for reversal to oviparity in sand boas (Eryx: Boidae). Evolution. DOI: 10.1111/j.1558-5646.2009.00790.x
Edwin Hubble's original classification of galaxies into various types based on their visible shapes and structures has been a feature of extra-galactic astronomy since the 1920s. The scheme, originally thought to depict an evolutionary sequence, has two major groups: spiral galaxies with a small central bulge, spiral arms and possibly a central bar, and elliptical galaxies that are more spherical in structure with no spiral arms or disk. There are however, many galaxies which do not fit into thi........ Read more »
McConnachie, A., Irwin, M., Ibata, R., Dubinski, J., Widrow, L., Martin, N., Côté, P., Dotter, A., Navarro, J., Ferguson, A.... (2009) The remnants of galaxy formation from a panoramic survey of the region around M31. Nature, 461(7260), 66-69. DOI: 10.1038/nature08327
It is thought that the Moon was formed about four and a half billion years ago by the collision of a Mars-sized object with the Earth. The heat from the impact and subsequent accretion of material created a magma ocean which would have caused the loss of most of the volatile materials from the surface, so-called because they have low boiling points and evaporate easily. In a press conference at NASA on Thursday 24th September, results were announced from three separate spacecraft showing eviden........ Read more »
Sunshine, J., Farnham, T., Feaga, L., Groussin, O., Merlin, F., Milliken, R., & A'Hearn, M. (2009) Temporal and Spatial Variability of Lunar Hydration as Observed by the Deep Impact Spacecraft. Science. DOI: 10.1126/science.1179788
Pieters, C., Goswami, J., Clark, R., Annadurai, M., Boardman, J., Buratti, B., Combe, J., Dyar, M., Green, R., Head, J.... (2009) Character and Spatial Distribution of OH/H2O on the Surface of the Moon Seen by M3 on Chandrayaan-1. Science. DOI: 10.1126/science.1178658
Clark, R. (2009) Detection of Adsorbed Water and Hydroxyl on the Moon. Science. DOI: 10.1126/science.1178105
This is an updated and extended review of the Handbook of Transportation Engineering by Myer Kutz (editor) which I have reviewed in a previous post 4 years ago: Book Review: The Handbook of Tranportation Engineering. While rummaging through references for a journal article I came across an old copy of the chapter on Transportation Engineering [ ... ]... Read more »
Using various techniques, astronomers have, over the last decade, discovered many hundreds of planets outside our own solar system. Most of these techniques are indirect because planets are much fainter than the stars they orbit, and so are very hard to detect directly. Because their effects are easier to spot, larger planets are easier to find, but smaller and smaller planets are being discovered as techniques and technology improve. One of the smallest exoplanets known to date is CoRoT-7b, a p........ Read more »
Queloz, D., Bouchy, F., Moutou, C., Hatzes, A., Hebrard, G., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P.... (2009) The CoRoT-7 planetary system: two orbiting super-Earths. Astronomy and Astrophysics. DOI: 10.1051/0004-6361/200913096
I'm going to be lazy and leech off the Mystery Micrograph again. None of you saner people (non-protistgeeks) seem to have taken advantage of the massive handicap, and subsequent hint. Seriously, type in "testate amoebae" in Google image search, and it's on the first page! Perhaps I should do a tutorial on some methods of attacking those mystery images...Quite shockingly(not!), Opisthokont got the last one. I agree with his statement that that was like shooting fish in a barrel, but easier since ........ Read more »
BODYL, A., MACKIEWICZ, P., & STILLER, J. (2007) The intracellular cyanobacteria of Paulinella chromatophora: endosymbionts or organelles?. Trends in Microbiology, 15(7), 295-296. DOI: 10.1016/j.tim.2007.05.002
Keeling, P. (2004) Diversity and evolutionary history of plastids and their hosts. American Journal of Botany, 91(10), 1481-1493. DOI: 10.3732/ajb.91.10.1481
LARA, E., HEGER, T., MITCHELL, E., MEISTERFELD, R., & EKELUND, F. (2007) SSU rRNA Reveals a Sequential Increase in Shell Complexity Among the Euglyphid Testate Amoebae (Rhizaria: Euglyphida). Protist, 158(2), 229-237. DOI: 10.1016/j.protis.2006.11.006
NOWACK, E., MELKONIAN, M., & GLOCKNER, G. (2008) Chromatophore Genome Sequence of Paulinella Sheds Light on Acquisition of Photosynthesis by Eukaryotes. Current Biology, 18(6), 410-418. DOI: 10.1016/j.cub.2008.02.051
THEISSEN, U., & MARTIN, W. (2006) The difference between organelles and endosymbionts. Current Biology, 16(24). DOI: 10.1016/j.cub.2006.11.020
Yoon, H., Reyes-Prieto, A., Melkonian, M., & Bhattacharya, D. (2006) Minimal plastid genome evolution in the Paulinella endosymbiont. Current Biology, 16(17). DOI: 10.1016/j.cub.2006.08.018
Who wouldn't be completely smitten with this lovely little critter!The latest issue of Nature has published the description of what is billed as the oldest feathered dinosaur, Anchiornis huxleyi. It's adorable! Read more here and here. It's not surprising anymore to find dinosaurs with feathers, as a matter of fact there are several small toy models of feathered dinosaurs on my desk right now looking up at me so they've started to find their way into popular culture. What makes Anchiornis so str........ Read more »
Hu, D., Hou, L., Zhang, L., & Xu, X. (2009) A pre-Archaeopteryx troodontid theropod from China with long feathers on the metatarsus. Nature, 461(7264), 640-643. DOI: 10.1038/nature08322
Richard Van Duyne (Northwestern University, Illinois) and coworkers have utilized surface-enhanced Raman spectroscopy towards characterizing dyes in artwork, for the purposes of artist identification and preservation. This news feature was written on October 4, 2009.... Read more »
Brosseau, C. L, Rayner, K. S., Casadio, F., Grzywacz, C. M., & Van Duyne, R. P. (2009) Surface-Enhanced Raman Spectroscopy: A Direct Method to Identify Colorants in Various Artist Media. Analytical Chemistry, 81(17), 7443-7447. DOI: 10.1021/ac901219m
In a first-of its-kind study, epidemiologists at the University of Pennsylvania School of Medicine found that, on average, guns did not protect those who possessed them from being shot in an assault. The study estimated that people with a gun were 4.5 times more likely to be shot in an assault than those not possessing a gun.
Read the rest of this post... | Read the comments on this post...... Read more »
Branas, C., Richmond, T., Culhane, D., Ten Have, T., & Wiebe, D. (2009) Investigating the Link Between Gun Possession and Gun Assault. American Journal of Public Health. DOI: 10.2105/AJPH.2008.143099
Just to clarify this post’s title: I have not taken up an extremely dangerous but exciting new hobby. The sea monsters from the title have been extinct for a long time. But that doesn’t stop scientists from figuring out how sexual characteristics developed in these Jurassic reptiles.
In humans and in other mammals, the X and Y chromosomes are responsible [...]... Read more »
Organ, C., Janes, D., Meade, A., & Pagel, M. (2009) Genotypic sex determination enabled adaptive radiations of extinct marine reptiles. Nature, 461(7262), 389-392. DOI: 10.1038/nature08350
Fig. 1 (Longo et al., 2009). The mirror box technique in which the subject has the experience of viewing their right hand, while in fact seeing their left hand reflected in a mirror.Sight modifies somatosensation, by either enhancing or diminishing the subjective intensity of touch (Kennett et al., 2001) and pain (Ramachandran & Altschuler, 2009), respectively. These phenomena provide fascinating and lesser studied examples of crossmodal integration, or how signals from one sensory modality ........ Read more »
Longo, M., Betti, V., Aglioti, S., & Haggard, P. (2009) Visually Induced Analgesia: Seeing the Body Reduces Pain. Journal of Neuroscience, 29(39), 12125-12130. DOI: 10.1523/JNEUROSCI.3072-09.2009
ResearchBlogging.orgCould changing when you have a recovery drink have a significant effect on strength, body comp and other performance factors? It may be that simple. If you like your workout routine, but want it to produce better results, you may find that changing one thing has a not insignificant effect. There seems to be significant benefit to strength, muscle fiber, body composition and muscle glycogen uptake based simply on when nutrients are taken around a workout. Likewise this nutrien........ Read more »
CRIBB, P., & HAYES, A. (2006) Effects of Supplement Timing and Resistance Exercise on Skeletal Muscle Hypertrophy. Medicine , 38(11), 1918-1925. DOI: 10.1249/01.mss.0000233790.08788.3e
Elliptical galaxies are the boring uncles of the galaxy family: they’re amorphous blobby things, ubiquitous in the Universe, that contain a fairly uniform population of old, red stars. Without the interstellar gas and dust that is needed to harbour pretty sites of star formation, they are supremely unphotogenic. But they have far more going on [...]... Read more »
Damjanov, I., & et al. (2009) Red nuggets at z~1.5: Compact passive galaxies and the formation of the Kormendy relation. The Astrophysical Journal, 695(1), 101-115. DOI: 10.1088/0004-637X/695/1/101
Bezanson, R., van Dokkum, P., Tal, T., Marchesini, D., Kriek, M., Franx, M., & Coppi, P. (2009) The relation between compact, quiescent high-redshift galaxies and massive nearby elliptical galaxies: Evidence for hierarchical, inside-out growth. The Astrophysical Journal, 697(2), 1290-1298. DOI: 10.1088/0004-637X/697/2/1290
Fan, L., Lapi, A., De Zotti, G., & Danese, L. (2008) The Dramatic Size Evolution of Elliptical Galaxies and the Quasar Feedback. The Astrophysical Journal, 689(2). DOI: 10.1086/595784
Tomonori Totani. (2009) Size Evolution of Early-Type Galaxies and Massive Compact Objects as the Dark Matter. PASJ. arXiv: 0908.3295v1
While the exact causes of mammalian aging are not know. The decline in replicative capacity of cells appears to be a factor. Activation of a particular gene p16INK4a causes the cell to arrest in a state of senescence at once suppressing cancer while attenuating its ability to replicate. Thus p16 may function via aging as [...]... Read more »
Denis Tsygankova, Yan Liub, Hanna K. Sanoffb, Norman E. Sharplessb, & Timothy C. Elstona. (2009) A quantitative model for age-dependent expression of the p16INK4a tumor suppressor. PNAS, 106(39). info:/
A recent study published in online issue of the Proceedings of the Royal Society B reconstructs a Nymphalid butterfly family tree and reveals family's evolutionary history which has remained a long term mystery due to the lack of butterfly fossils. The age of Nymphalidae butterflies has been the subject of longstanding confusion but according to this new study Nymphalids first evolved 90 million years ago which suprisingly coincides with the global rise of the angiosperms at about 100 million y........ Read more »
Wahlberg, N., Leneveu, J., Kodandaramaiah, U., Pena, C., Nylin, S., Freitas, A., & Brower, A. (2009) Nymphalid butterflies diversify following near demise at the cretaceous/tertiary boundary. Proceedings of the Royal Society B: Biological Sciences. DOI: 10.1098/rspb.2009.1303
I recently heard Martin Seligman talk here in London and then went back and watched his TED speech from last year. His work on Positive Psychology is has identified key identifiers that signify what we commonly call a full life, focused on optimism. But if it is possible, should we do away with depression?... Read more »
Seligman, M., Steen, T., Park, N., & Peterson, C. (2005) Positive Psychology Progress: Empirical Validation of Interventions. American Psychologist, 60(5), 410-421. DOI: 10.1037/0003-066X.60.5.410
We’ve already covered Ardi’s hands here, so let’s move on to what is possibly the most interesting aspect of her skeleton: The feet.
As humans, we have pretty special feet. They’re good at dissipating all of the force that comes with walking on only two feet. They’re also good at propelling us forward, since [...]... Read more »
Lovejoy, C., Latimer, B., Suwa, G., Asfaw, B., & White, T. (2009) Combining Prehension and Propulsion: The Foot of Ardipithecus ramidus. Science, 326(5949), 72-72. DOI: 10.1126/science.1175832
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