A historical review of the importance of symmetry and Noether's theorem... Read more »
Rubens de Melo Marinho Jr. (2006) Noether's theorem in classical mechanics revisited. http://arxiv.org/abs/physics/0608264. info:/
A background on Maxwell's Demon and the thought experiments tackling the issue of converting information into energy.... Read more »
Toyabe, S., Sagawa, T., Ueda, M., Muneyuki, E., & Sano, M. (2010) Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality. Nature Physics. DOI: 10.1038/nphys1821
Review of recent advances in cell phone microscopes... Read more »
Zhu, H., Yaglidere, O., Su, T., Tseng, D., & Ozcan, A. (2011) Cost-effective and compact wide-field fluorescent imaging on a cell-phone. Lab on a Chip. DOI: 10.1039/C0LC00358A
Identifying individual amino acid residues within a GPCR and comparing these across different receptors is a routine task that’s helped by a widely accepted nomenclature system: that of Ballesteros and Weinstein.... Read more »
Juan A. Ballesteros, Harel Weinstein. (1995) Integrated methods for the construction of three-dimensional models and computational probing of structure-function relations in G protein-coupled receptors. Methods in Neurosciences, 366-428. DOI: 10.1016/S1043-9471(05)80049-7
It's long been claimed that the Earth has more than one Moon, it doesn't. But while there is just one big rocky thing in a stable orbit around us there are also a host of smaller bodies that perform a temporary dance with the Earth.... Read more »
Ohm's law (current proportional to voltage) was first formulated in 1827 and the discoverer George Ohm would be pleased to know that in 2012 the law still holds even at the smallest possible nanoscale. Weber et al. in their report in Science do not explain how they would expect conductors to behave in another way at this nanoscale but ventured ahead anyway to create a truly tiny electrical wire, run a current through it and measure resistivity. ... Read more »
What should vegetarians do when medicines contain animal products? The answer seems an easy one: to refuse them or to act according to their conscience. But what if the consumers are not appropriately informed about the medicine components, or the doctors not even know that it contains animal products?... Read more »
Vissamsetti, B., Payne, M., & Payne, S. (2012) Inadvertent prescription of gelatin-containing oral medication: its acceptability to patients. Postgraduate Medical Journal. DOI: 10.1136/postgradmedj-2011-130306
Arsenic contaminated groundwater currently threatens the health of 70 million people in 61 of 64 districts in Bangladesh. Many people living in districts plagued with arsenic contaminated ground water regularly drink water with concentrations of arsenic far above national and WHO standards. An important study from Prof Peter Atkins and Dr Manzurul Hassan explores how groundwater arsenic concentration varies throughout areas of southwest Bangladesh. ... Read more »
Hassan MM, & Atkins PJ. (2011) Application of geostatistics with Indicator Kriging for analyzing spatial variability of groundwater arsenic concentrations in Southwest Bangladesh. Journal of environmental science and health. Part A, Toxic/hazardous substances , 46(11), 1185-96. PMID: 21879851
New studies in high-energy astronomy have shown that there are many more galaxies with central supermassive black holes that are actively accreting material. In a new gamma-ray survey, about 24% of the active galaxies were not previously known to have active black hole accretion, as they did not show up in lower-energy observations.... Read more »
Lisa M. Winter. (2011) Uncovering Local Absorbed Active Galactic Nuclei with Swift and Suzaku. 2011. arXiv: 1112.0545v1
A new study that raised concerns about exercise should instead raise concerns about obesity.... Read more »
Claude Bouchard, Steven Blair, Timothy Church, Conrad Earnest, James Hagberg, Keijo Häkkinen, Nathan Jenkins, Laura Karavirta, William Kraus, Arthur Leon.... (2012) Adverse Metabolic Response to Regular Exercise: Is It a Rare or Common Occurrence?. PLOS One, 7(5). info:/10.1371/journal.pone.0037887
Researchers at the University of Essex, in the UK, have found that babies born to women who kept working during their eighth month of pregnancy tend to weight 230g less than those born to mothers who stopped working. The harm was bigger when the women had lower levels of education, while there was no harm at all when they were younger than 24.... Read more »
Emilia Del Bono, John Ermisch, & Marco Francesconi. (2012) Intrafamily Resource Allocations: A Dynamic Structural Model of Birth Weight. Journal of Labor Economics. DOI: 10.1086/664831
Recent surprising evidence has shown that metastatic tumors usually do not vary in their genomes within an individual. Yet, these tumors behave differently at different sites around the body. Does that mean that epigenetic profiling will be too variable to target for cancer treatment? In a word, no.... Read more »
Aryee MJ, Liu W, Engelmann JC, Nuhn P, Gurel M, Haffner MC, Esopi D, Irizarry RA, Getzenberg RH, Nelson WG.... (2013) DNA methylation alterations exhibit intraindividual stability and interindividual heterogeneity in prostate cancer metastases. Science translational medicine, 5(169). PMID: 23345608
The good news is that 95% of the protein aggregates in the inclusion body are your protein of interest. To get a 95% pure sample of protein you just have to lyse the cells using your preferred method (sonication works well, as does French press) in a lyses buffer containing Triton X-100. You then centrifuge your inclusion bodies containing your aggregated protein and discard the soluble supernatant. Next, you wash your inclusion body pellet in lysis buffer without Triton X-100 to remove the dete........ Read more »
A series of studies from the University of Utah found that our ancestors expanded their culinary tastes to grasses and grains, as much as 3.5 million years ago.... Read more »
Cerling TE, Manthi FK, Mbua EN, Leakey LN, Leakey MG, Leakey RE, Brown FH, Grine FE, Hart JA, Kaleme P.... (2013) Stable isotope-based diet reconstructions of Turkana Basin hominins. Proceedings of the National Academy of Sciences of the United States of America. PMID: 23733966
Wynn JG, Sponheimer M, Kimbel WH, Alemseged Z, Reed K, Bedaso ZK, & Wilson JN. (2013) Diet of Australopithecus afarensis from the Pliocene Hadar Formation, Ethiopia. Proceedings of the National Academy of Sciences of the United States of America. PMID: 23733965
In 2008, doctor Sergio Canavero, an italian neurosurgeon based in Turin, IT, have awakened a 20 years old lady from a permanent post-traumatic vegetative state, by means of a bifocal extradural cortical electro-stimulation. Today, while Science still find it hard to explain consciousness and embodied cognition – the world-class neurosurgeon made a shock announcement: “I’m ready for the first head transplant on a man.”
In the manuscript published on Surgical Neurology I........ Read more »
Canavero, S. (2013) HEAVEN: The head anastomosis venture Project outline for the first human head transplantation with spinal linkage (GEMINI). Surgical Neurology International, 4(2), 335. DOI: 10.4103/2152-7806.113444
The latest issue of Development includes a paper by Clare Blackburn and colleagues at the Medical Research Council Centre for Regenerative Medicine, University of Edinburgh, showing that the aged mouse thymus can be regenerated in vivo by the upregulation of a single transcription factor, FOXN1.... Read more »
Bredenkamp, N., Nowell, C., & Blackburn, C. (2014) Regeneration of the aged thymus by a single transcription factor. Development, 141(8), 1627-1637. DOI: 10.1242/dev.103614
Imagine you are offered a package full of delicious chocolates. Would the size of the pieces of chocolate influences how much you eat?
Yes, it does matter. This blog post is about the unit size effect of indulgent food and why consumers eat less with smaller unit sizes.
... Read more »
van Kleef Ellen, Kavvouris Christos, & van Trijp Hans C.M. (2014) The unit size effect of indulgent food: How eating smaller-sized items signals impulsivity and makes consumers eat less. Psychology , 1-41. DOI: 10.1080/08870446.2014.909426
Chinese scientists have designed a nano-turbine using carbon nanotubes (CNT) and graphene.... Read more »
Despite ongoing IT-related innovation, aggregate U.S. productivity growth slowed markedly after 2004. While economists are again unable to find the productivity in their statistics, many people in Silicon Valley think that this slowdown has to be at least in part illusory. Who is right?... Read more »
Chad Syverson. (2016) Challenges to Mismeasurement Explanations for the U.S. Productivity Slowdown. NBER Working Papers. DOI: 10.3386/w21974
Byrne, D., Fernald, J., & Reinsdorf, M. (2016) Does the United States have a Productivity Slowdown or a Measurement Problem. Finance and Economics Discussion Series, 2016(017), 1-74. DOI: 10.17016/FEDS.2016.017
Chad Syverson. (2013) Will History Repeat Itself? Comments on “Is the Information Technology Revolution Over?”. International Productivity Monitor, 37-40. info:/
Amanda Alvarez writes about how neuroscientists are studying consciousness with mathematics.... Read more »
Oizumi M, Tsuchiya N, & Amari SI. (2016) Unified framework for information integration based on information geometry. Proceedings of the National Academy of Sciences of the United States of America, 113(51), 14817-14822. PMID: 27930289
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