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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Minimalistic Supramolecular Proteoglycan Mimics By Co-Assembly Of Aromatic Peptide And Carbohydrate Amphiphiles, Alexandra Brito, Yousef M. Abul-Haija, Diana Soares De Costa, Ramon Novoa-Carballal, Rui L. Reis, Rein V. Ulijn, Ricardo A. Pires, Iva Pashkuleva
Minimalistic Supramolecular Proteoglycan Mimics By Co-Assembly Of Aromatic Peptide And Carbohydrate Amphiphiles, Alexandra Brito, Yousef M. Abul-Haija, Diana Soares De Costa, Ramon Novoa-Carballal, Rui L. Reis, Rein V. Ulijn, Ricardo A. Pires, Iva Pashkuleva
Advanced Science Research Center
We report the co-assembly of aromatic carbohydrate and dipeptide amphiphiles under physiological conditions as a strategy to generate minimalistic proteoglycan mimics. The resulting nanofibers present a structural, fluorenylmethoxycarbonyl-diphenylalanine (Fmoc-FF) core and a functional carbohydrate (Fmoc-glucosamine-6-sulfate or -phosphate) shell. The size, degree of bundling and mechanical properties of the assembled structures depend on the chemical nature of the carbohydrate amphiphile used. In cell culture medium, these nanofibers can further organize into supramolecular hydrogels. We demonstrate that, similar to proteoglycans, the assembled gels prolong the stability of growth factors and preserve the viability of cultured cells. Our results demonstrate that this approach …
Potential For Natural Evaporation As A Reliable Renewable Energy Resource, Ahmet-Hamdi Cavusoglu, Xi Chen, Pierre Gentine, Ozgur Sahin
Potential For Natural Evaporation As A Reliable Renewable Energy Resource, Ahmet-Hamdi Cavusoglu, Xi Chen, Pierre Gentine, Ozgur Sahin
Advanced Science Research Center
About 50% of the solar energy absorbed at the Earth’s surface drives evaporation, fueling the water cycle that affects various renewable energy resources, such as wind and hydropower. Recent advances demonstrate our nascent ability to convert evaporation energy into work, yet there is little understanding about the potential of this resource. Here we study the energy available from natural evaporation to predict the potential of this ubiquitous resource. We find that natural evaporation from open water surfaces could provide power densities comparable to current wind and solar technologies while cutting evaporative water losses by nearly half. We estimate up to …
A Global Empirical Typology Of Anthropogenic Drivers Of Environmental Change In Deltas, Zachary D. Tessler, Charles J. Vorosmarty, Michael Grossberg, Irina Gladkova, Hannah Aizenman
A Global Empirical Typology Of Anthropogenic Drivers Of Environmental Change In Deltas, Zachary D. Tessler, Charles J. Vorosmarty, Michael Grossberg, Irina Gladkova, Hannah Aizenman
Advanced Science Research Center
It is broadly recognized that river delta systems around the world are under threat from a range of anthropogenic activities. These activities occur at the local delta scale, at the regional river and watershed scale, and at the global scale. Tools are needed to support generalization of results from case studies in specific deltas. Here, we present a methodology for quantitatively constructing an empirical typology of anthropogenic change in global deltas. Utilizing a database of environmental change indicators, each associated with increased relative sea-level rise and coastal wetland loss, a clustering analysis of 48 global deltas provides a quantitative assessment …
Satisfaction, Water And Fertilizer Use In The American Residential Macrosystem, Peter M. Groffman, J Morgan Grove, Colin Polsky, Neil D. Bettez, Jennifer L. Morse, Jeanine Cavender-Bares, Sharon J. Hall, James B. Heffernan, Sarah E. Hobbie, Kelli L. Larson, Christopher Neill, Kristen Nelson, Laura Ogden, Jarlath O'Neil-Dunne, Diane Pataki, Rinku Roy Chowdhury, Dexter H. Locke
Satisfaction, Water And Fertilizer Use In The American Residential Macrosystem, Peter M. Groffman, J Morgan Grove, Colin Polsky, Neil D. Bettez, Jennifer L. Morse, Jeanine Cavender-Bares, Sharon J. Hall, James B. Heffernan, Sarah E. Hobbie, Kelli L. Larson, Christopher Neill, Kristen Nelson, Laura Ogden, Jarlath O'Neil-Dunne, Diane Pataki, Rinku Roy Chowdhury, Dexter H. Locke
Advanced Science Research Center
Residential yards across the US look remarkably similar despite marked variation in climate and soil, yet the drivers of this homogenization are unknown. Telephone surveys of fertilizer and irrigation use and satisfaction with the natural environment, and measurements of inherent water and nitrogen availability in six US cities (Boston, Baltimore, Miami, Minneapolis-St. Paul, Phoenix, Los Angeles) showed that the percentage of people using irrigation at least once in a year was relatively invariant with little difference between the wettest (Miami, 85%) and driest (Phoenix, 89%) cities. The percentage of people using fertilizer at least once in a year also ranged …
Historical Legacies, Information And Contemporary Water Science And Management, Daniel J. Bain, Jennifer A. S. Arrigo, Mark B. Green, Brian A. Pellerin, Charles J. Vörösmarty
Historical Legacies, Information And Contemporary Water Science And Management, Daniel J. Bain, Jennifer A. S. Arrigo, Mark B. Green, Brian A. Pellerin, Charles J. Vörösmarty
Advanced Science Research Center
Hydrologic science has largely built its understanding of the hydrologic cycle using contemporary data sources (i.e., last 100 years). However, as we try to meet water demand over the next 100 years at scales from local to global, we need to expand our scope and embrace other data that address human activities and the alteration of hydrologic systems. For example, the accumulation of human impacts on water systems requires exploration of incompletely documented eras. When examining these historical periods, basic questions relevant to modern systems arise: (1) How is better information incorporated into water management strategies? (2) Does any point …