Cupriavidus metallidurans (roughly translated: lover of copper, enduring metal) is a bacterium of the class Betaproteobacteria known for its ability to withstand high concentrations of numerous metals that would be toxic to most other living things. These metals, which include Ag, Au, Bi, Cd, Co, Cr, Cs, Cu, Hg, Ni, Pb, Sr, Tl, U, and Zn, tend to cause problems for bacterial cells by binding to DNA or proteins, which can disrupt important stuff like obtaining energy or reproducing.The bacterium ........ Read more »
Phillips G, Reith F, Qualls C, Ali AM, Spilde M, & Appenzeller O. (2010) Bacterial deposition of gold on hair: Archeological, forensic and toxicological implications. PloS One, 5(2). PMID: 20174476
Wiesemann N, Mohr J, Grosse C, Herzberg M, Hause G, Reith F, & Nies DH. (2013) Influence of copper resistance determinants on gold transformation by Cupriavidus metallidurans strain CH34. Journal of Bacteriology, 195(10), 2298-308. PMID: 23475973
Studies find airplane crews at high altitude are exposed to potentially harmful levels of radiation from cosmic rays. But could these cosmic rays pose hazards even at sea level? In recent years, research has suggested congenital birth defects down on Earth’s surface could be caused by these “solar particle events” — spikes in cosmic rays from the sun that touch off the northern lights and sometimes hamper communications or the electric power grid.... Read more »
Overholt, A., Melott, A., & Atri, D. (2015) A link between solar events and congenital malformations: Is ionizing radiation enough to explain it?. Journal of Geophysical Research: Space Physics, 120(3), 1537-1542. DOI: 10.1002/2014JA020681
In 1938, a Russian scientist by the name of Mogilewskii published a paper describing the use of methane-oxidizing bacteria as a means of prospecting for natural gas fields. Several patents were subsequently issued to oil companies in the 1940s based on this paper and others by American researchers.The idea is that smaller gaseous hydrocarbons (e.g. methane, propane, butane) tend to escape in small amounts from underground oil and gas deposits and rise to the surface. The continuous seepage of th........ Read more »
Rasheed, M., Hasan, S., Rao, P., Boruah, A., Sudarshan, V., Kumar, B., & Harinarayana, T. (2014) Application of geo-microbial prospecting method for finding oil and gas reservoirs. Frontiers of Earth Science, 9(1), 40-50. DOI: 10.1007/s11707-014-0448-5
Originally written for the Geological Society of London’s History Of Geology Group, where I am web editor. Amidst the many events this year celebrating William Smith and the publication of his 1815 map, comes another, less well-known anniversary. The acceptance of continental drift led to a seismic shift in 20th century geology, the development of the theory … Continue reading Accepting Continental Drift: 50th anniversary of the seminal Bullard et al. map →
The post Accepting........ Read more »
Everett, J., & Smith, A. (2008) Genesis of a Geophysical Icon: The Bullard, Everett and Smith Reconstruction of the Circum-Atlantic Continents. Earth Sciences History, 27(1), 1-11. DOI: 10.17704/eshi.27.1.w0v227931k184h64
It’s been 30 years since Farman et al. published their paper on the ozone “hole”. (Well, I’m a day early but who posts on Saturdays, eh?) It had a huge impact: it’s been cited nearly 3,000 times and accelerated the negotiations that resulted in the Montreal Protocol, which helped phase out the chemicals that were […]... Read more »
Farman, J., Gardiner, B., & Shanklin, J. (1985) Large losses of total ozone in Antarctica reveal seasonal ClOx/NOx interaction. Nature, 315(6016), 207-210. DOI: 10.1038/315207a0
Nanoparticles, it’s the new buzzword that cosmetics and even consumer “anti-aging” products use to promote their brand. As the word suggests, nanoparticles are small and it shouldn’t be too surprising that these nanoparticles are causing problems in nature because of their prevalence. In that light, it might not be a surprise that there could also be some serious health issues associated with these nanoparticles.... Read more »
Taylor, A., Marcus, I., Guysi, R., & Walker, S. (2015) Metal Oxide Nanoparticles Induce Minimal Phenotypic Changes in a Model Colon Gut Microbiota. Environmental Engineering Science, 2147483647. DOI: 10.1089/ees.2014.0518
Shale oil has helped the US see lower gas prices and even an opportunity to start exporting. However, it isn’t as great as it might sound, hydraulic fracturing — also known as fracking — has been scrutinized by environmentalists since it’s inception. As it turns out, for good reason, substances commonly used for drilling or extracting Marcellus shale gas foamed from the drinking water taps of three Pennsylvania homes near a reported well-pad leak, according to new analysis from a team of........ Read more »
Garth T. Llewellyn, Frank Dorman, J. L. Westland, D. Yoxtheimer, Paul Grieve, Todd Sowers, E. Humston-Fulmer, & Susan L. Brantley. (2015) Evaluating a groundwater supply contamination incident attributed to Marcellus Shale gas development. PNAS. info:/10.1073/pnas.1420279112
http://www.researchblogging.org"> alt="ResearchBlogging.org" src="http://www.researchblogging.org/public/citation_icons/rb2_large_gray.png" style="border:0;"/>Visiting the city of Valencia in Spain for the first time, we were pleasantly greeted by the subtle aroma of orange blossoms in the air and the sight of beautiful oranges dangling from the orange trees that line the street pavements. Whilst many parts of the city are bordered with trees, there are also other green spaces, ........ Read more »
Searle, S., Turnbull, M., Boelman, N., Schuster, W., Yakir, D., & Griffin, K. (2012) Urban environment of New York City promotes growth in northern red oak seedlings. Tree Physiology, 32(4), 389-400. DOI: 10.1093/treephys/tps027
I recently had a paper published in Antarctic Science – I don’t think that it’ll set the world on fire but it was quite interesting in how it came about so I thought I’d write a blogpost about it. The study The measurements for the study were taken by a team who sailed across the […]... Read more »
Russell, A., Gohlan, M., Smedley, A., & Densham, M. (2014) The ultraviolet radiation environment during an expedition across the Drake Passage and on the Antarctic Peninsula. Antarctic Science. DOI: 10.1017/S0954102014000790
Ever hear that old saying an apple a day keeps the Doctor away? Well it might have the right idea, just the wrong person. New research investigating the relationship between eating fruit and vegetables containing pesticide residues and the quality of men’s semen has shown a link with lower sperm counts and percentages of normally-formed sperm. So for people wanting children it may be time to rethink that produce.... Read more »
Y.H. Chiu et al. (2015) Fruit and vegetable intake and their pesticide residues in relation to semen quality among men from a fertility clinic. Human Reproduction. info:/10.1093/humrep/dev064
Hagai Levine, & Shanna H. Swan. (2015) Is dietary pesticide exposure related to semen quality? Positive evidence from men attending a fertility clinic. Human Reproduction. info:/10.1093/humrep/dev065
Deflector shields allowed Star Trek and other sci-fi franchises to have long space battles. Without them, one good strike and everyone was dead – that wouldn’t lend itself to sequels.
We don’t need shields for space battles yet, but we do need them to get to Mars. Cosmic radiation will kill or injure every astronaut unless we can deflect the radiation away from the spacecraft. We’re just about to build real deflectors, and our teachers are the magnetic fields we find ........ Read more »
Bamford, R., Kellett, B., Bradford, J., Todd, T., Benton, M., Stafford-Allen, R., Alves, E., Silva, L., Collingwood, C., Crawford, I.... (2014) An exploration of the effectiveness of artificial mini-magnetospheres as a potential solar storm shelter for long term human space missions. Acta Astronautica, 105(2), 385-394. DOI: 10.1016/j.actaastro.2014.10.012
Bamford, R., Gibson, K., Thornton, A., Bradford, J., Bingham, R., Gargate, L., Silva, L., Fonseca, R., Hapgood, M., Norberg, C.... (2008) The interaction of a flowing plasma with a dipole magnetic field: measurements and modelling of a diamagnetic cavity relevant to spacecraft protection. Plasma Physics and Controlled Fusion, 50(12), 124025. DOI: 10.1088/0741-3335/50/12/124025
Walsh, B., Foster, J., Erickson, P., & Sibeck, D. (2014) Simultaneous Ground- and Space-Based Observations of the Plasmaspheric Plume and Reconnection. Science, 343(6175), 1122-1125. DOI: 10.1126/science.1247212
When the government first changed policy to require ethanol in gasoline, we were told it would reduce our carbon footprint. Then food prices rose significantly and corn in particular saw the largest price rise. This was because corn is a staple in production of almost any other food from eggs to beef, but the policy made environmental sense. Well it made sense, until you found out that the new government policy also took into account people eating less.... Read more »
Searchinger, T., Edwards, R., Mulligan, D., Heimlich, R., & Plevin, R. (2015) Do biofuel policies seek to cut emissions by cutting food?. Science, 347(6229), 1420-1422. DOI: 10.1126/science.1261221
Lifeforms that live off methane instead of water are possible on Titan’s surface.... Read more »
Stevenson, J., Lunine, J., & Clancy, P. (2015) Membrane alternatives in worlds without oxygen: Creation of an azotosome. Science Advances, 1(1). DOI: 10.1126/sciadv.1400067
SUMMARY: In this fascinating video, Professor Ros Rickaby from Oxford chats with Professor Simon Conway-Morris at Cambridge about how Earth’s changing chemistry has affected evolution, and how this can sometimes lead to evolutionary convergence... Read more »
Williams R. J. P. (1981) The Bakerian Lecture, 1981: Natural Selection of the Chemical Elements. Proceedings of the Royal Society B: Biological Sciences, 213(1193), 361-397. DOI: http://dx.doi.org/10.1098/rspb.1981.0071
Cook L. M., I. J. Saccheri, & J. Mallet. (2012) Selective bird predation on the peppered moth: the last experiment of Michael Majerus. Biology Letters, 8(4), 609-612. DOI: http://dx.doi.org/10.1098/rsbl.2011.1136
Dhingra A., & H. Daniell. (2004) Enhanced translation of a chloroplast-expressed RbcS gene restores small subunit levels and photosynthesis in nuclear RbcS antisense plants. Proceedings of the National Academy of Sciences, 101(16), 6315-6320. DOI: http://dx.doi.org/10.1073/pnas.0400981101
Hippos are strange mammals. They lack hairs and sweat glands, and have an unusually thick skin. The only other mammals that share these features with hippos are whales, but they look nothing alike, except they’re also huge and live in water. Coincidence? Traditionally hippos were included in the Suidae (pigs) branch of the mammalian evolutionary tree, but molecular data unambiguously shows that they're closely related to cetaceans (whales, dolphins and porpoises). This not only sounds unlikely........ Read more »
Lihoreau Fabrice, Fredrick Kyalo Manthi, & Stéphane Ducrocq. (2015) Hippos stem from the longest sequence of terrestrial cetartiodactyl evolution in Africa. Nature Communications, 6264. DOI: http://dx.doi.org/10.1038/ncomms7264
SUMMARY: It’s inevitable: as science progresses, controversy happens. But sometimes, the public sees controversy where none exists. How to remedy that? ... Read more »
Darwin C. (1839) Observations on the Parallel Roads of Glen Roy, and of Other Parts of Lochaber in Scotland, with an Attempt to Prove That They Are of Marine Origin. Philosophical Transactions of the Royal Society of London, 39-81. DOI: http://dx.doi.org/10.1098/rstl.1839.0005
Convergent cross-mapping analysis finds 'modest causal effect' of cosmic rays on global temperatures over short timescales, but rules out effect on long-term global warming.... Read more »
Tsonis, A., Deyle, E., May, R., Sugihara, G., Swanson, K., Verbeten, J., & Wang, G. (2015) Dynamical evidence for causality between galactic cosmic rays and interannual variation in global temperature. Proceedings of the National Academy of Sciences, 201420291. DOI: 10.1073/pnas.1420291112
Many Cambrian fossils are simply spines and sclerites unassociated with any body. Few of the exceptionally-preserved Cambrian freaks come with spines attached, and some of the most prominent of these are the chancelloriids. Originally described as sponges by Charles Doolittle Walcott back in 1920 (Walcott, 1920), modern researchers have found that the spines are very similar to those […]
The post Chancelloriids Revised appeared first on Teaching Biology.
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Stefan Bengtson, & Desmond Collins. (2015) Chancelloriids of the Cambrian Burgess Shale. Palaeontologia Electronica. info:other/
Life as we know it, when we peer deep into the vastness of space we look for someone — or something — that resembles ourselves. Carbon based, needs water lifeforms, but what if we’re being narrow-minded? A new type of methane-based, oxygen-free life form that can metabolize and reproduce similar to life on Earth has been modeled by a team of researchers suggests we are being too closed minded about life.... Read more »
James Stevenson,, Jonathan Lunine,, & Paulette Clancy. (2015) Membrane alternatives in worlds without oxygen: Creation of an azotosome. Science Advances. info:/http://dx.doi.org/10.1126/sciadv.1400067
Minnesota is the "Land of 10,000 Lakes," at least 13 of which are named Clear. But some of these lakes are clearer and cleaner than others. Does that matter to the tourists who visit them? Researchers found an easy way to answer this question by taking a deep dive into Flickr.
Bonnie Keeler, a scientist at the University of Minnesota's Institute on the Environment, explains that it's important to measure how the public is using various lakes, rivers and streams. Agencies that are trying........ Read more »
Keeler, B., Wood, S., Polasky, S., Kling, C., Filstrup, C., & Downing, J. (2015) Recreational demand for clean water: evidence from geotagged photographs by visitors to lakes. Frontiers in Ecology and the Environment, 2147483647. DOI: 10.1890/140124
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