نتایج جستجو برای: nano crystallography

تعداد نتایج: 61504  

Journal: :Crystals 2022

Protein crystallization plays a fundamental role in structural biology and chemistry, drug discovery, crystallography itself. Determining how to improve the crystal growth is necessary vital during whole process. According recently published data, crystallizing proteins on nanoporous surfaces (i.e., metal–organic framework, abbreviated as MOF) faster demands less protein. However, dispersing mi...

Journal: :Cement and Concrete Research 2021

The ASR products in concrete have various chemical compositions. It is yet unclear whether and how these develop micro-expansion upon moisture ingress. This paper presents a 3D in-situ observation of the crystallography volume change an ASR-product-filled vein under varying relative-humidity (R.H.). was observed to contain two layered nano-crystalline phases with distinct basal spacings, distri...

Journal: :Annual review of physical chemistry 2006
Ahmed H Zewail

In this review, we highlight the progress made in the development of 4D ultrafast electron diffraction (UED), crystallography (UEC), and microscopy (UEM) with a focus on concepts, methodologies, and prototypical applications. The joint atomic-scale resolutions in space and time, and sensitivity reached, make it possible to determine complex transient structures and assemblies in different phase...

Journal: :Physical chemistry chemical physics : PCCP 2009
Christel Gervais Laure Bonhomme-Coury Francesco Mauri Florence Babonneau Christian Bonhomme

Octameric silsesquioxanes (RSiO(1.5))(8) are versatile and interesting nano building blocks, suitable for the synthesis of nanocomposites with controlled porosity. In this paper, we revisit the (29)Si and (13)C solid state NMR spectroscopy for this class of materials, by using GIPAW (gauge including projected augmented wave) first principles calculations [Pickard & Mauri, Phys. Rev. B, 2001, 63...

Journal: :Scientific reports 2016
Sven C Curtze Marita Kratz Marian Steinert Sebastian Vogt

New insights into the architecture and formation mechanisms of calcific lesions down to the nanoscale open a better understanding of atherosclerosis and its pathogenesis. Scanning electron - and atomic force microscope based nano-analytical characterization techniques were adapted to the assessment of an ex-vivo calcified coronary artery. Human atherosclerotic tissue and bone tissue reside a ty...

2013
Irene Russo Krauss Antonello Merlino Alessandro Vergara Filomena Sica

The elucidation of the three dimensional structure of biological macromolecules has provided an important contribution to our current understanding of many basic mechanisms involved in life processes. This enormous impact largely results from the ability of X-ray crystallography to provide accurate structural details at atomic resolution that are a prerequisite for a deeper insight on the way i...

Journal: :Comput. Graph. Forum 2003
Chandrajit L. Bajaj

The 3D structures of individual proteins or small complexes, such as most of the Protein Data Bank entries, are still unable to yield the ”full picture” of a functional biological complex. The study of large macromolecular complexes, such as viruses, ion channels, the ribosome and other macromolecular machines of various types, offer more complete structural and functional description of the na...

2013
Basanta Pathak

Theoretical analysis and Computer simulations have proven to be cost-effective and powerful tools in scientific studies of materials, particularly at nano-scale where synthesis of nano-structures, interpretation of their observed character and exploration of new structures are not always straight forward. We present here fundamental principles of techniques used today for computational simulati...

Journal: :Indian journal of experimental biology 2010
Deepshikha Tinku Basu

The nanostructured polyaniline (NSPANI) and its gold nano composite (GNP) with controlled size distribution were developed using structure directing agents (SDA). The nano structure of polyaniline were investigated by UV-Visible spectroscopy, transmission electron microscopy (TEM), dynamic light scattering (DLS), fourrier transform spectroscopy (FTIR), X-ray crystallography and scanning electro...

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