Results 81 to 90 of about 89,811 (264)

ICE VII, THE DENSEST FORM OF ICE

Proceedings of the National Academy of Sciences, 1964
In the pressure range 0-25 kilobars there occur 7 different crystalline modifications of ice,(1) whereas from 25 kbar up to the highest pressure so far tried, 200 kbar, only a single form occurs:(2) ice VII, of density about 1.7 gm cm^-3. Ice VII thus seems in some sense to be an "ultimate" crystalline form of ice, and its structure is therefore of ...
B, Kamb, B L, Davis
openaire   +3 more sources

Si‐Doped Nanocrystalline Diamond as Highly Sensitive Luminescence Thermometer for the Physiological Temperature Range

Advanced Functional Materials, EarlyView.
In this work, diamonds with negative charged silicon‐vacancy (SiV−) centers have been designed for use as thermometers in biomedical applications. Multiparametric analysis of the emission characteristics of the SiV− centers provides extraordinary sensitivity for temperature detection in the physiological temperature range.
María Gragera, Iván Carrillo‐Berdugo, Josue Millán, Paulius Pobedinskas, Antonio Freire, Ken Haenen, Javier Navas   +6 more
wiley   +1 more source

Tailored Diketopyrrolopyrrole Derivatives for Efficient Deep‐Red Organic Lasers

Advanced Functional Materials, EarlyView.
Tailored diketopyrrolopyrrole derivatives exhibit high stable amplified spontaneous emission with single or dual bands. Incorporated into distributed‐feedback lasers based on one‐ and two‐dimensional dichromated‐gelatin diffractive gratings, these materials provide a robust, flexible platform for integrated organic deep‐red light sources. ABSTRACT Deep‐
Pablo Pasqués‐Gramage, Abelardo Sánchez‐Oliva, Álex Farrando‐Pérez, Pedro G. Boj, M. Victoria Gómez, Ana M. Rodríguez, Pilar Prieto, Rafael Muñoz‐Mármol, Andrew J. Musser, Iván Torres‐Moya, María A. Díaz‐García   +10 more
wiley   +1 more source

Синтез комбинированного управления ориентацией и высотой квадрокоптера на основе блочного подхода с сигмовидными обратными связями

Информатика и автоматизация
В работе рассматривается проблема управления ориентацией и высотой квадрокоптера при наличии неопределенностей в модели объекта. При решении данной проблемы особенно актуально учитывать особенности объекта: сильную подверженность колебаниям крена ...
Aleksey Antipov, Julia Kokunko, Daniyar Wolf, Aleksandr Shirokov   +3 more
doaj   +1 more source

Plasmonic Enhancement of Fluorescence and Protein Dynamics in Living Mammalian Cells

Advanced Materials, EarlyView.
This study demonstrates plasmonic enhancement of the function of fluorescent voltage sensing proteins (genetically encoded voltage indicators, (GEVIs), QuasAr6) in live mammalian cells. Coupling to plasmonic nanoparticles does not just increase fluorescence, but influences the protein photocycle, creating a hybrid sensor with its response speed to ...
Marco Locarno, Qiangrui Dong, Marco Post, Xin Meng, Cristiano Glessi, Nynke Marije Hettema, Nidas Brandsma, Sebbe Blokhuizen, Alejandro Castañeda Garcia, Srividya Ganapathy, Thieme Schmidt, Lars van Roemburg, Bing Xu, Chun‐Ting Cho, Liedewij Laan, Miao‐Ping Chien, Daan Brinks   +16 more
wiley   +1 more source

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

Advanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo, Masoud Mansouri, Carlos Garcia‐Fernandez, Daniel Sánchez‐Portal, Aran Garcia‐Lekue, Gustavo Ceballos, Aitor Mugarza   +6 more
wiley   +1 more source

Unique structure and function of viral rhodopsins

Nature Communications, 2019
Rhodopsin genes have been identified in some large double-stranded DNA viruses, but the structure and functions of viral rhodopsins remain unknown. Here authors present crystal structure and characterization of an Organic Lake Phycodnavirus rhodopsin II (
Dmitry Bratanov, Kirill Kovalev, Jan-Philipp Machtens, Roman Astashkin, Igor Chizhov, Dmytro Soloviov, Dmytro Volkov, Vitaly Polovinkin, Dmitrii Zabelskii, Thomas Mager, Ivan Gushchin, Tatyana Rokitskaya, Yuri Antonenko, Alexey Alekseev, Vitaly Shevchenko, Natalya Yutin, Riccardo Rosselli, Christian Baeken, Valentin Borshchevskiy, Gleb Bourenkov, Alexander Popov, Taras Balandin, Georg Büldt, Dietmar J. Manstein, Francisco Rodriguez-Valera, Christoph Fahlke, Ernst Bamberg, Eugene Koonin, Valentin Gordeliy   +28 more
doaj   +1 more source

The effect of ice rubble on ice-ice sliding [PDF]

, 2015
Ice deformation processes in the Arctic can generate ice rubble. Many situations arise where ice fragments of varying size separate sea ice floes. While the shear forces between sea ice floes in direct contact with each other are controlled by ice-ice friction, what is not known is how the slip of the floes is affected by the presence of rubble between
Scourfield, Sally, Sammonds, Peter, Lishman, Ben, Marchenko, Aleksey   +3 more
openaire  

Thermal‐Driven Diode Polarity Switching From Competing Helical Superconducting States in WTe2/α‐Fe2O3 Heterostructures

Advanced Materials, EarlyView.
A Nb‐proximitized Josephson junction based on a WTe2/α‐Fe2O3 heterostructure exhibits a robust superconducting diode effect with programmable polarity. The diode direction can be trained by magnetic fields and switched by temperature cycling, revealing tunable finite‐momentum pairing states and competing superconducting states in symmetry‐broken ...
Enze Zhang, Grant Z. X. Yang, Zi‐Ting Sun, Xinhou Chen, Shishun Zhao, Chufan Chen, Chenhui Zhang, Fanrui Hu, K. T. Law, Hyunsoo Yang   +9 more
wiley   +1 more source

Consecutive episodes of heart and kidney failure in an “otherwise” healthy young man

BMC Nephrology, 2019
Background Acute renal failure is a rare occurrence in a patient with an unremarkable past medical history and should always lead to an in depth clinical study.
V. Esposito, D. Catucci, M. Colucci, M. Torreggiani, F. Grosjean, C. Esposito   +5 more
doaj   +1 more source