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Bioremediation of marine oil splatters by immobilized oil-degrading germs along with diet emulsion.
Copyright © 2019 American Chemical Society.About a decade ago, it was realised that the satisfaction of a given identity (or equation) of the form f ( x 1 , … , x n ) ≈ f ( y 1 , … , y n ) in an algebra is equivalent to the algebra forcing a loop into any graph on which it acts and which contains a certain finite subgraph associated with the identity. Such identities have since also been called loop conditions, and this characterisation has produced spectacular results in universal algebra, such as the satisfaction of a Siggers identity s ( x , y , z , x ) ≈ s ( y , x , y , z ) in any arbitrary non-trivial finite idempotent algebra. We initiate, from this viewpoint, the systematic study of sets of identities of the form f ( x 1 , 1 , … , x 1 , n ) ≈ ⋯ ≈ f ( x m , 1 , … , x m , n ) , which we call loop conditions of width m . We show that their satisfaction in an algebra is equivalent to any action of the algebra on a certain type of relation forcing a constant tuple into the relation. Proving that for each fixed width m there is a weakest loop conditihe satisfaction of a fixed single identity. © 2019 The Author(s). The Bulletin of the London Mathematical Society is copyright © London Mathematical Society.We prove several unique continuation results for biharmonic maps between Riemannian manifolds. © 2019 The Author(s). The Bulletin of the London Mathematical Society is copyright © London Mathematical Society.Bacteria play key roles in the function and diversity of aquatic systems, but aside from study of specific bloom systems, little is known about the diversity or biogeography of bacteria associated with harmful cyanobacterial blooms (cyanoHABs). CyanoHAB species are known to shape bacterial community composition and to rely on functions provided by the associated bacteria, leading to the hypothesized cyanoHAB interactome, a coevolved community of synergistic and interacting bacteria species, each necessary for the success of the others. Here, we surveyed the microbiome associated with Microcystis aeruginosa during blooms in 12 lakes spanning four continents as an initial test of the hypothesized Microcystis interactome. We predicted that microbiome composition and functional potential would be similar across blooms globally. Our results, as revealed by 16S rRNA sequence similarity, indicate that M. aeruginosa is cosmopolitan in lakes across a 280° longitudinal and 90° latitudinal gradient. The microbiome communities were represented by a wide range of operational taxonomic units and relative abundances. Highly abundant taxa were more related and shared across most sites and did not vary with geographic distance, thus, like Microcystis, revealing no evidence for dispersal limitation. High phylogenetic relatedness, both within and across lakes, indicates that microbiome bacteria with similar functional potential were associated with all blooms. While Microcystis and the microbiome bacteria shared many genes, whole-community metagenomic analysis revealed a suite of biochemical pathways that could be considered complementary. Our results demonstrate a high degree of similarity across global Microcystis blooms, thereby providing initial support for the hypothesized Microcystis interactome. © 2019 The Authors. Limnology and Oceanography published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography.We conduct a resume field experiment in all U.S. states to study how state laws protecting older workers from age discrimination affect age discrimination in hiring for retail sales jobs. We relate the difference in callback rates between old and young applicants to state variation in age and disability discrimination laws. selleck compound These laws could boost hiring of older applicants, although they could have the unintended consequence of deterring hiring if they increase termination costs. In our preferred estimates that are weighted to be representative of the workforce, we find evidence that there is less discrimination against older men and women in states where age discrimination law allows larger damages, and more limited evidence that there is lower discrimination against older women in states where disability discrimination law allows larger damages. Our clearest result is that these laws do not have the unintended consequence of lowering callbacks for older workers.Green Machine is a competitive strategy card game facilitating a systems thinking approach to learning recycling processes and green chemistry in accordance with the United Nations Sustainable Development Goals. Players compete to be the first to be able to launch their recycling plant by collecting a series of playing cards. Players must use interpersonal skills to consider the interconnected systems while showing an appreciation for commercial awareness and versatility, as dynamic problem solving (reflecting real-world scenarios) is required to play the game successfully. The card game was implemented with 19 U.K. graduate students and 29 U.S. second-year undergraduate students. Survey feedback showed that Green Machine was an innovative resource that was enjoyable to play and engaged students in learning recycling processes through systems thinking. On the basis of pre- and post-test questions to evaluate learning gain, Green Machine is a helpful resource to introduce students not only to green chemistry and sustainability but also to taking a systems thinking approach to learning. Copyright © 2019 American Chemical Society and Division of Chemical Education, Inc.Increasing demand for chemicals worldwide, depleting resources, consumer pressure, stricter legislation, and the rising cost of waste disposal are placing increasing pressure on chemical and related industries. For any organization to survive in the current arena of growing climate change laws and regulations, and increasing public influence, the issue of sustainability must be fundamental to the way it operates. A sustainable manufacturing approach will enable economic growth to be combined with environmental and social sustainability and will be realized via collaboration between a multidisciplinary community including chemists, biologists, engineers, environmental scientists, economists, experts in management, and policy makers. Hence, employees with new skills, knowledge, and experience are essential. To realize this approach, the design and development of a series of workshops encompassing systems thinking are presented here. After close consultation with industry, an annual program of interactive workshops has been designed for graduate students to go beyond examining the "greening" of chemical reactions, processes, and products, and instead embed a systems thinking approach to learning.
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