Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal

Citation: Baranov, D. G., Edgar, J. H., Hoffman, T., Bassim, N., & Caldwell, J. D. (2015). Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal. Physical Review B, 92(20), 6. doi:10.1103/PhysRevB.92.201405Traditionally, efforts to achieve perfect absorption have required the use of complicated metamaterial-based structures as well as relying on destructive interference to eliminate back reflections. Here, we have demonstrated both theoretically and experimentally that such perfect absorption can be achieved using a naturally occurring material, hexagonal boron nitride (hBN) due to its high optical anisotropy without the requirement of interference effects to absorb the incident field. This effect was observed for p-polarized light within the mid-infrared spectral range, and we provide the full theory describing the origin of the perfect absorption as well as the methodology for achieving this effect with other materials. Furthermore, while this is reported for the uniaxial crystal hBN, this is equally applicable to biaxial crystals and more complicated crystal structures. Interferenceless absorption is of fundamental interest to the field of optics; moreover, such materials may provide additional layers of flexibility in the design of frequency selective surfaces, absorbing coatings, and sensing devices operating in the infrared

Accumulation of some heavy metals in the prevailing plants (Alhagi mourorum and Suaeda vermiculata) near the thermal power plant in Al-Nasiriyah city south of Iraq

The present study aims to investigate the effect of Thermal power plant emissions upon two species of plant  Alhagi mourorum  and Suaeda vermiculata which growth in the region close to Thermal power plant. triplicater samples were collected seasonllys from  autumn 2016 up to summer 2017 one time from each season. three station were selected in the study area  to execute this study meters. The first station distances 400 meters from the thermal power station, The second station is located 800 meters from the thermal power plant . While, the third station distances 1200 meters from the thermal power plant . Three stations were with prevailing wind direction (north wind) , while control station situated far from the thermal power plant about 12 km. the concentratios of heavy  metals Cd, Cu, Pb and Zn were estimate in root and shoot systems for both plants, their concentration in root system more higher than their concentrations in shoot system. its concluded from the present study  that thermal electric power station emissions affected upon the plants which growth in the surrounding region with thermal power plant.

Accumulation of some heavy metals in the prevailing plants (Alhagi mourorum and Suaeda vermiculata) near the thermal power plant in Al-Nasiriyah city south of Iraq

The present study aims to investigate the effect of Thermal power plant emissions upon two species of plant  Alhagi mourorum  and Suaeda vermiculata which growth in the region close to Thermal power plant. triplicater samples were collected seasonllys from  autumn 2016 up to summer 2017 one time from each season. three station were selected in the study area  to execute this study meters. The first station distances 400 meters from the thermal power station, The second station is located 800 meters from the thermal power plant . While, the third station distances 1200 meters from the thermal power plant . Three stations were with prevailing wind direction (north wind) , while control station situated far from the thermal power plant about 12 km. the concentratios of heavy  metals Cd, Cu, Pb and Zn were estimate in root and shoot systems for both plants, their concentration in root system more higher than their concentrations in shoot system. its concluded from the present study  that thermal electric power station emissions affected upon the plants which growth in the surrounding region with thermal power plant.

Structure and function of the human Gly1619Arg polymorphism of M6P/IGF2R domain 11 implicated in IGF2 dependent growth

The mannose 6-phosphate/IGF 2 receptor (IGF2R) is comprised of 15 extra-cellular domains that bind IGF2 and mannose 6-phosphate ligands. IGF2R transports ligands from the Golgi to the pre-lysosomal compartment and thereafter to and from the cell surface. IGF2R regulates growth, placental development, tumour suppression and signalling. The ligand IGF2 is implicated in the growth phenotype, where IGF2R normally limits bioavailability, such that loss and gain of IGF2R results in increased and reduced growth respectively. The IGF2R exon 34 (5002A>G) polymorphism (rs629849) of the IGF2 specific binding domain has been correlated with impaired childhood growth (A/A homozygotes). We evaluated the function of the Gly1619Arg non-synonymous amino acid modification of domain 11. NMR and X-ray crystallography structures located 1619 remote from the ligand binding region of domain 11. Arg1619 was located close to the fibronectin type II (FnII) domain of domain 13, previously implicated as a modifier of IGF2 ligand binding through indirect interaction with the AB loop of the binding cleft. However, comparison of binding kinetics of IGF2R, Gly1619 and Arg1619 to either IGF2 or mannose 6-phosphate revealed no differences in ‘on’ and ‘off’ rates. Quantitative PCR, 35S pulse chase and flow cytometry failed to demonstrate altered gene expression, protein half-life and cell membrane distribution, suggesting the polymorphism had no direct effect on receptor function. Intronic polymorphisms were identified which may be in linkage disequilibrium with rs629849 in certain populations. Other potential IGF2R polymorphisms may account for the correlation with childhood growth, warranting further functional evaluation

Editorial notes for the ESPR special issue on Green Technology and Industrial Revolution 4.0 for a greener future

As the world faces unprecedented environmental challenges, it is increasingly clear that green technology is one of the most effective ways to protect our planet’s natural resources and address pressing environmental problems. Furthermore, the integration of sustainability with Industry Revolution 4.0 has the potential to revolutionize the entire environmental and chemical engineering industry. The theme of this special issue highlights the need to embed green technology and Industry 4.0 into sustainable development goals, with a particular emphasis on meeting the needs of the bottom billions in the community. Articles published in this issue offer valuable insights into how green technology can be harnessed to promote sustainable development, and how Industry 4.0 can be leveraged to drive innovation and change

Enhanced superconductivity in aluminum-based hyperbolic metamaterials

One of the most important goals of condensed matter physics is materials by design, i.e. the ability to reliably predict and design materials with a set of desired properties. A striking example is the deterministic enhancement of the superconducting properties of materials. Recent experiments have demonstrated that the metamaterial approach is capable of achieving this goal, such as tripling the critical temperature T-C in Al-Al2O3 epsilon near zero (ENZ) core-shell metamaterial superconductors. Here, we demonstrate that an Al/Al2O3 hyperbolic metamaterial geometry is capable of a similar T-C enhancement, while having superior transport and magnetic properties compared to the core-shell metamaterial superconductors