Are antioxidants good for you? Many people believe that the answer to this question is yes, and some think that antioxidants might even help prevent cancer. We’ve posted about this before, and as yet the evidence is far from conclusive – at least as far as cancer’s concerned.
Now new research is set to make matters [...]... Read more »
Schafer, Z., Grassian, A., Song, L., Jiang, Z., Gerhart-Hines, Z., Irie, H., Gao, S., Puigserver, P., & Brugge, J. (2009) Antioxidant and oncogene rescue of metabolic defects caused by loss of matrix attachment. Nature, 461(7260), 109-113. DOI: 10.1038/nature08268
Omenn, G. (1996) Effects of a Combination of Beta Carotene and Vitamin A on Lung Cancer and Cardiovascular Disease. New England Journal of Medicine, 334(18), 1150-1155. DOI: 10.1056/NEJM199605023341802
Labriola D, & Livingston R. (1999) Possible interactions between dietary antioxidants and chemotherapy. Oncology (Williston Park, N.Y.), 13(7), 1003. PMID: 10442346
Low Back Pain: Where Exactly Is The Pain Coming From?Inspired by the opinions of Nikolai Bogduk & Charles April Often through school we are thought to render a diagnosis. We memorize the signs and symptoms and collaborate methods of treatment. This conundrum continues on and on in the academic system only to leave us just as adequate as those which have thought us. It’s easy to fall into this spiral and often at times forget to challenge yourself or the opinions of........ Read more »
Sci WAS going to do a cool story on bee sex sent to her by the charming Gg of Skulls in the Stars, but that's going to have to happen next week. I just CAN'T let this one go by. I mean, a shark with a sexual organ on its HEAD?! It's just too good:
Observe the Twitter record:
scicurious RT @jonahlehrer New shark has sex organ on head: http://tinyurl.com/nxqt6b At least the girls know which head its thinking with.
scicurious RT @jonahlehrer New shark has sex organ on head: http://tinyurl.com/........ Read more »
KELSEY C. JAMES, DAVID A. EBERT, DOUGLAS J. LONG . (2009) A new species of chimaera, Hydrolagus melanophasma sp. nov. (Chondrichthyes: Chimaeriformes: Chimaeridae), from the eastern North Pacific. Zootaxa, 59-68. info:/
The world doesn't stop when night falls. From rabbits to night-club bouncers, there's a whole cast of nocturnal characters who come out to play. It's a similar story with the brain. When we disengage from the outside world, the brain doesn't go to sleep. Rather, there's a suite of neural regions, known collectively as the "default mode network", that spring to life. Over the last decade, this recognition of the brain's intrinsic functioning has led neuroscientists to perform numerous studies in ........ Read more »
There’s more than 11 citations here, but the others are associated news and media covered by Science. They’ve even dedicated a special issue to it. Very impressive thorough volume of information. Now you have a some understanding why it took so long to publish… Anyways get to reading.
Gibbons, A. (2009). A New Kind of [...]... Read more »
N/A. (2009) Video: The Analysis of Ardipithecus ramidus--One of the Earliest Known Hominids. Science, 326(5949), 60-60. DOI: 10.1126/science.326_60b
White, T., Asfaw, B., Beyene, Y., Haile-Selassie, Y., Lovejoy, C., Suwa, G., & WoldeGabriel, G. (2009) Ardipithecus ramidus and the Paleobiology of Early Hominids. Science, 326(5949), 64-64. DOI: 10.1126/science.1175802
WoldeGabriel, G., Ambrose, S., Barboni, D., Bonnefille, R., Bremond, L., Currie, B., DeGusta, D., Hart, W., Murray, A., Renne, P.... (2009) The Geological, Isotopic, Botanical, Invertebrate, and Lower Vertebrate Surroundings of Ardipithecus ramidus. Science, 326(5949), 65-65. DOI: 10.1126/science.1175817
Louchart, A., Wesselman, H., Blumenschine, R., Hlusko, L., Njau, J., Black, M., Asnake, M., & White, T. (2009) Taphonomic, Avian, and Small-Vertebrate Indicators of Ardipithecus ramidus Habitat. Science, 326(5949), 66-66. DOI: 10.1126/science.1175823
White, T., Ambrose, S., Suwa, G., Su, D., DeGusta, D., Bernor, R., Boisserie, J., Brunet, M., Delson, E., Frost, S.... (2009) Macrovertebrate Paleontology and the Pliocene Habitat of Ardipithecus ramidus. Science, 326(5949), 67-67. DOI: 10.1126/science.1175822
Suwa, G., Asfaw, B., Kono, R., Kubo, D., Lovejoy, C., & White, T. (2009) The Ardipithecus ramidus Skull and Its Implications for Hominid Origins. Science, 326(5949), 68-68. DOI: 10.1126/science.1175825
Suwa, G., Kono, R., Simpson, S., Asfaw, B., Lovejoy, C., & White, T. (2009) Paleobiological Implications of the Ardipithecus ramidus Dentition. Science, 326(5949), 69-69. DOI: 10.1126/science.1175824
Lovejoy, C., Simpson, S., White, T., Asfaw, B., & Suwa, G. (2009) Careful Climbing in the Miocene: The Forelimbs of Ardipithecus ramidus and Humans Are Primitive. Science, 326(5949), 70-70. DOI: 10.1126/science.1175827
Lovejoy, C., Suwa, G., Spurlock, L., Asfaw, B., & White, T. (2009) The Pelvis and Femur of Ardipithecus ramidus: The Emergence of Upright Walking. Science, 326(5949), 71-71. DOI: 10.1126/science.1175831
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
Lovejoy, C., Suwa, G., Simpson, S., Matternes, J., & White, T. (2009) The Great Divides: Ardipithecus ramidus Reveals the Postcrania of Our Last Common Ancestors with African Apes. Science, 326(5949), 73-73. DOI: 10.1126/science.1175833
Lovejoy, C. (2009) Reexamining Human Origins in Light of Ardipithecus ramidus. Science, 326(5949), 74-74. DOI: 10.1126/science.1175834
First, a short glossary.
Homologous genes are descended from a common ancestral gene.
There are two types of homology:
Orthology is homology due to a speciation event. So if there is a gene A’ in humans and A” in mice, and they are obviously similar in sequence, we infer that they homologous. We usually also infer that they [...]... Read more »
Studer, R., & Robinson-Rechavi, M. (2009) How confident can we be that orthologs are similar, but paralogs differ?. Trends in Genetics, 25(5), 210-216. DOI: 10.1016/j.tig.2009.03.004
The National Evolutionary Synthesis Center is holding a contest - $750 towards attending SciOnline 2010 for two bloggers who write exceptional evolutionary blog posts in 2009. Living in Hawaii, it's tough to afford the round trip to North Carolina all by me onesies, so here's my attempt at getting the funds!When Good Genes Go BadWe tend to think of evolution as a directional process, whether its from simplicity to complexity or 'less fit' to 'more fit.' Even the classic images of evolution, like........ Read more »
Leonard A. Freed, Rebecca L. Cann, & Karl Diller. (2009) Sexual dimorphism and the evolution of seasonal variation in sex allocation in the Hawaii akepa. Evolutionary Ecology Research, 731-757. info:/
The other day, our car wouldn't start and Jim had to ask a neighbor over to help him jump-start it. There was much rushing in and out of the house looking for flashlights and other tools to help get the job done. After the neighbor left, Jim wanted to drive somewhere and couldn't find the keys. Clearly he had just had them because he was working on the car. Where could they be? We searched up and down throughout the house, but we couldn't find them and eventually had to use a spare set.
The nex........ Read more »
EHINGER, K., & BROCKMOLE, J. (2008) The role of color in visual search in real-world scenes: Evidence from contextual cuing. Perception , 70(7), 1366-1378. DOI: 10.3758/PP.70.7.1366
Slogger Charles Mudede points to a new epidemiological study on the effectiveness of carrying a gun for self defense [$-a]. Not only does packing heat fail to help in the event of an armed robbery,... individuals in possession of a gun were 4.46 (P That's right, carrying a gun increases the odds that you'll be shot by an armed assailant. It also increases the odds that you'll be shot fatally, by about 4.23 times. The authors interviewed 677 gun assault victims in Philadelphia, from between 2003 ........ 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
There was a study in the New Scientist earlier this year linking what people look like with their personality (I blogged it a few weeks ago). It turned out that it was possible to spot the religious women in the sample from their faces alone.Now interpreting this was a little tricky, because the non-religious 'typical face' was smiling, and the religious one wasn't. Which suggests that, in the UK at least, you can spot religious people because they don't smile.But here's a new study, from the US........ Read more »
Naumann LP, Vazire S, Rentfrow PJ, & Gosling SD. (2009) Personality Judgments Based on Physical Appearance. Personality and social psychology bulletin. PMID: 19762717
Denial of Service (DoS) and distributed Denial of Service (DDoS) attacks involve an attempt to make a computer resource unavailable to its intended users. This may simply be for malicious purposes as is often the case when big commercial or famous web sites, such as Amazon, Yahoo, and Google, undergo a DDoS attack.
However, it is [...]Post from: David Bradley's Sciencetext Tech TalkZombie Botnet Denial
... Read more »
Chwan-Hwa Wu, Tong Liu, Chun-Ching Huang, & J. David Irwin. (2009) Modelling and simulations for Identity-Based Privacy-Protected Access Control Filter (IPACF) capability to resist massive denial of service attacks. Int. J. Information and Computer Security, 3(2), 195-223. info:/
A new study out in the Journal of Agricultural and Food Chemistry suggests a natural remedy to the negative effects of pesticides to plants. A group of plant hormones called brassinosteroids have been shown to reduce the toxicity of crops, if they’re doused with it before pesticide application.
Jing Quan Yu of Zhejiang University and his [...]
... Read more »
Xia, X., Zhang, Y., Wu, J., Wang, J., Zhou, Y., Shi, K., Yu, Y., & Yu, J. (2009) Brassinosteroids Promote Metabolism of Pesticides in Cucumber. Journal of Agricultural and Food Chemistry, 57(18), 8406-8413. DOI: 10.1021/jf901915a
As a follow-up on the AIDS vaccine post, here is an upcoming article from Science about the identification of antibodies active against the HIV virus, identified in the blood of an african donor.There is an ongoing effort to isolate antibodies that neutralize the HIV virus from people infected with the virus. One of the reoccurring issues with these neutralizing antibodies is that the ones identified so far are very specific against the strain which infected that particular individual. Antibodie........ Read more »
Walker LM, Phogat SK, Chan-Hui PY, Wagner D, Phung P, Goss JL, Wrin T, Simek MD, Fling S, Mitcham JL.... (2009) Broad and Potent Neutralizing Antibodies from an African Donor Reveal a New HIV-1 Vaccine Target. Science (New York, N.Y.). PMID: 19729618
The existence of post-partum psychosis and post-partum depression has been hotly contested publicly. Tom Cruise’s denouncement of Brooke Shields’ diagnosis of post-partum depression is perhaps the most visible example of the controversy among laypeople, but in the medical literature the reality of both post-partum depression and post-partum psychosis is much more well-established.
The so-called “baby blues” [...]... Read more »
FAIRBROTHER, N., & ABRAMOWITZ, J. (2007) New parenthood as a risk factor for the development of obsessional problems. Behaviour Research and Therapy, 45(9), 2155-2163. DOI: 10.1016/j.brat.2006.09.019
Carlos Roberto Fonseca has published an ominous forecast for the fate of specialist insect herbivores (i.e. monophages or those that feed on only one species of plant). According to his calculations, somewhere between 213,830 and 547,500 monophagous insect species are trending towards extinction in biodiversity hotspots.... Read more »
FONSECA, C. (2009) The Silent Mass Extinction of Insect Herbivores in Biodiversity Hotspots. Conservation Biology. DOI: 10.1111/j.1523-1739.2009.01327.x
Children have a very important role transmitting the Influenza virus. Since they had less contact with the virus, their immune reaction is lower and less effective; therefore, during the infection they have a higher viral load. A higher viral load associated with contact with several other children from different places in the same school, playing [...]... Read more »
Cauchemez, S., Valleron, A., Boëlle, P., Flahault, A., & Ferguson, N. (2008) Estimating the impact of school closure on influenza transmission from Sentinel data. Nature, 452(7188), 750-754. DOI: 10.1038/nature06732
Although it is one of the most basic issues, Influenza virus transmission is still the target of much discussion. The role of contact contamination or through droplets and aerosols is considered a hot potato . After a certain period without many experiments, nowadays we are aware that ferrets and guinea pigs may be infected by [...]... Read more »
Moser MR, Bender TR, Margolis HS, Noble GR, Kendal AP, & Ritter DG. (1979) An outbreak of influenza aboard a commercial airliner. American journal of epidemiology, 110(1), 1-6. PMID: 463858
Klontz KC, Hynes NA, Gunn RA, Wilder MH, Harmon MW, & Kendal AP. (1989) An outbreak of influenza A/Taiwan/1/86 (H1N1) infections at a naval base and its association with airplane travel. American journal of epidemiology, 129(2), 341-8. PMID: 2912044
Another week has gone by and some very interesting molbio blog posts have been aggregated into Researchblogging.org. Every week [see my inaugural post on the matter], I'll select some blog posts I consider particularly interesting in the field of molecular biology [see here to get a sense of the criteria that will be used], briefly describe them and list them here for you to check out.Note that ... Read more »
Bridgham JT, Ortlund EA, & Thornton JW. (2009) An epistatic ratchet constrains the direction of glucocorticoid receptor evolution. Nature, 461(7263), 515-9. PMID: 19779450
Kim, J., Greber, B., Araúzo-Bravo, M., Meyer, J., Park, K., Zaehres, H., & Schöler, H. (2009) Direct reprogramming of human neural stem cells by OCT4. Nature, 461(7264), 649-643. DOI: 10.1038/nature08436
Zhang Y, Thiele I, Weekes D, Li Z, Jaroszewski L, Ginalski K, Deacon AM, Wooley J, Lesley SA, Wilson IA.... (2009) Three-dimensional structural view of the central metabolic network of Thermotoga maritima. Science (New York, N.Y.), 325(5947), 1544-9. PMID: 19762644
Our weekly compilation of science news for the week of September 27, 2009.... Read more »
Abidian, M., Ludwig, K., Marzullo, T., Martin, D., & Kipke, D. (2009) Interfacing Conducting Polymer Nanotubes with the Central Nervous System: Chronic Neural Recording using Poly(3,4-ethylenedioxythiophene) Nanotubes. Advanced Materials, 21(37), 3764-3770. DOI: 10.1002/adma.200900887
Billinger, M. (2009) Nontuberculous Mycobacteria–associated Lung Disease, United States in Hospitalized Persons, 1998–2005. Emerging Infectious Diseases. DOI: 10.3201/eid1510.090196
Bekinschtein, T., Shalom, D., Forcato, C., Herrera, M., Coleman, M., Manes, F., & Sigman, M. (2009) Classical conditioning in the vegetative and minimally conscious state. Nature Neuroscience, 12(10), 1343-1349. DOI: 10.1038/nn.2391
Having loosely defined Metacommunities as a set of distinct ecological communities that are biologically entangled through the spatial dispersion of commonly hosted and interacting species, the focal point of those conversations moved to descriptions of some specific behaviors exhibited by spring peeper and squirrel frogs, and how those behaviors could be interpreted through the metacommunity perspective.
... Read more »
Werner, E., Relyea, R., Yurewicz, K., Skelly, D., & Davis, C. (2009) Comparative landscape dynamics of two anuran species: climate-driven interaction of local and regional processes. Ecological Monographs, 79(3), 503-521. DOI: 10.1890/08-1047.1
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