Results 71 to 80 of about 496,175 (298)

Determination of the HMX and RDX content in synthesized energetic material by HPLC, FT-MIR, and FT-NIR spectroscopies

Química Nova, 2004
A new method has been developed for determining the content of mixtures of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), the HMX/RDX ratio, in explosive compositions by Fourier transform ...
Elizabeth C. Mattos, Enézio D. Moreira, Rita C. L. Dutra, Milton F. Diniz, Ana Paula Ribeiro, Koshun Iha   +5 more
doaj   +1 more source

Anticipation în the Context of Altered States of Consciousness [PDF]

, 2004
Starting from the paradigm of the material continuum we discuss the possibility to transcend the space-time reality (Here-and-Now) in the aim of investigating the energetic and informational reality, support of the continuous present.
Manolea, Aliodor
core  

Modeling and analysis of a phase field system for damage and phase separation processes in solids [PDF]

, 2013
In this work, we analytically investigate a multi-component system for describing phase separation and damage processes in solids. The model consists of a parabolic diffusion equation of fourth order for the concentration coupled with an elliptic system ...
Bonetti, Elena, Heinemann, Christian, Kraus, Christiane, Segatti, Antonio   +3 more
core   +3 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Crystal structure of the 1:1 cocrystal 5,5′-(triaz-1-ene-1,3-diyl)bis(3-nitro-1H-1,2,4-triazole)–triethylammonium nitrate

Acta Crystallographica Section E: Crystallographic Communications
The triethylammonium nitrate cocrystal of 5,5′-(triaz-1-ene-1,3-diyl)bis(3-nitro-1H-1,2,4-triazole), C4H3N11O4·C6H16N·NO3 (3), was obtained unintentionally as the product of an attempted synthesis of a heterocyclic C-bromonitrilimine from 3-amino-5-nitro-
Matthew Gettings, Matthias Zeller, Davin Piercey   +2 more
doaj   +1 more source

Thermally assisted ion beam etching of polytetrafluoroethylene, a new technique for high aspect ratio etching of MEMS [PDF]

, 1996
In micromechanics, the etching of high aspect ratio structures in polymers is a prime technology. Normally, oxygen-based reactive ion etching or the LIGA technique are used to achieve this goal.
Berenschot, Erwin, Burger, Gert-Jan, Elwenspoek, Miko, Gardeniers, Han, Jansen, Henri   +4 more
core   +3 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Novel NSTEX System Based on Ti/CuO/NC Nanothermite Doped with NTO

Energies
Modern energetic materials (EMs), e.g., nanothermite and NSTEX (Nanostructured Thermites and Explosive) compositions are attracting increasing research interest.
Mateusz Polis, Agnieszka Stolarczyk, Konrad Szydło, Barbara Lisiecka, Marcin Procek, Sebastian Sławski, Tomasz Gołofit, Łukasz Hawelek, Tomasz Jarosz   +8 more
doaj   +1 more source

Modes of Growth in Dynamic Systems [PDF]

, 2012
Regardless of a system's complexity or scale, its growth can be considered to be a spontaneous thermodynamic response to a local convergence of down-gradient material flows.
de Groot S. R., Kooijman S. A. L. M., Langmuir I., Liou K., Lotka A. J., Nicolis G., Pruppacher H. R., Squires P., Turner J. S.   +8 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source