Enchaining EDTA-chelated lanthanide molecular magnets into ordered 1D networks

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72510-72518 ◽  
Author(s):  
Rebecca J. Holmberg ◽  
Ilia Korobkov ◽  
Muralee Murugesu
Keyword(s):  
Molecular Magnets ◽  
One Dimension ◽  
Molecular Systems ◽  
Magnetic Molecules ◽  
Ordered Arrays ◽  
Unique Method

Extending molecular systems into chain networks is a unique method with which to orient magnetic molecules into well-ordered arrays along one dimension, and study their resulting properties.

Ukraine Imports Democracy: External Influences on the Orange Revolution

2007 ◽  
Vol 32 (2) ◽  
pp. 45-83 ◽  
Author(s):  
Michael McFaul
Keyword(s):  
External Factors ◽  
One Dimension ◽  
The West ◽  
Internal Factors ◽  
External Influences ◽  
Orange Revolution ◽  
Autocratic Regime ◽  
Unique Method ◽  
Causal Impact ◽  
Distribution Of Power

Can the West promote democracy? An examination of one critical case, the 2004 Orange Revolution in Ukraine, offers a unique method for generating answers to this important theoretical and policy question. Tracing the causal impact of external influences first requires a theory of democratization composed exclusively of domestic factors, specifically the changing distribution of power between the autocratic regime and democratic challengers. Once these internal factors have been identified, the extent to which external factors influenced either the strength of the autocratic regime or the democratic challengers can be measured. Domestic factors accounted for most of the drama of the Orange Revolution, but external factors did play a direct, causal role in constraining some dimensions of autocratic power and enhancing some dimensions of the opposition's power. International assistance in the form of ideas and financial resources was crucial to only one dimension of the Orange Revolution: exposing fraud. Yet significant international inputs also can be identified regarding the preservation of semi-autocracy, the nurturing of an effective political opposition, the development of independent media, and the capacity to mobilize protesters after the falsified presidential vote.

Acetylene Coupler Builds Strong and Tunable Diradical Organic Molecular Magnets

2021 ◽  
Author(s):  
Jiapeng Ma ◽  
Yuan Yuan ◽  
Baotao Kang ◽  
Jin Yong Lee
Keyword(s):  
Molecular Magnets ◽  
Low Energy ◽  
Spintronic Devices ◽  
Magnetic Molecules

Sufficiently strong molecular magnets are used in small modern electronic and spintronic devices. Diradical organic magnetic molecules (OMMs) are promising options due to their lightness, flexibility, and low energy required...

scholarly journals Intra-molecular origin of the spin-phonon coupling in slow-relaxing molecular magnets

2017 ◽  
Vol 8 (9) ◽  
pp. 6051-6059 ◽  
Author(s):  
Alessandro Lunghi ◽  
Federico Totti ◽  
Stefano Sanvito ◽  
Roberta Sessoli
Keyword(s):  
Molecular Magnets ◽  
Molecular Vibrations ◽  
Phonon Coupling ◽  
Magnetic Molecules ◽  
Molecular Origin

The design of slow relaxing magnetic molecules requires the optimization of internal molecular vibrations to reduce spin-phonon coupling.

Magnetic Quality in a Boscovichian Assemblage of Molecular Magnets

1906 ◽  
Vol 25 (2) ◽  
pp. 1025-1059 ◽  
Author(s):  
W. Peddie
Keyword(s):  
Molecular Magnets ◽  
Molecular Magnetism ◽  
Magnetic Molecules ◽  
Directional Control ◽  
Firm Basis ◽  
Material Bodies ◽  
Mutual Action ◽  
Great Development ◽  
Magnetic Phenomena

1. The gradual growth of the theory of molecular magnetism from the original suggestions of Poisson and Weber is well known. The recent great development, made by Ewing, and tested experimentally by means of models, has placed the theory on a fairly firm basis, and has made essentially secure the fundamental postulate that magnetic phenomena in material bodies are due to magnetic molecules which may possibly be regarded as free from any directional control other than that supplied by their own mutual action.

Reconstruction of Objects from their Projections Using Orthogonal Functions

1973 ◽  
Vol 31 ◽  
pp. 268-269
Author(s):  
Elrnar Zeitler
Keyword(s):  
Unit Area ◽  
Three Dimensional ◽  
One Dimension ◽  
Spatial Density ◽  
Dimensional Representation ◽  
Orthogonal Functions ◽  
Object A ◽  
Plane Normal ◽  
Dimensional Object ◽  
Spatial Density Distribution

Considering any finite three-dimensional object, a “projection” is here defined as a two-dimensional representation of the object's mass per unit area on a plane normal to a given projection axis, here taken as they-axis. Since the object can be seen as being built from parallel, thin slices, the relation between object structure and its projection can be reduced by one dimension. It is assumed that an electron microscope equipped with a tilting stage records the projectionWhere the object has a spatial density distribution p(r,ϕ) within a limiting radius taken to be unity, and the stage is tilted by an angle 9 with respect to the x-axis of the recording plane.

RNA polymerase: Preparation and structural analysis of helical polymers

1984 ◽  
Vol 42 ◽  
pp. 152-153
Author(s):  
E. Loren Buhle ◽  
Pamela Rew ◽  
Ueli Aebi
Keyword(s):  
Structural Analysis ◽  
Rna Polymerase ◽  
Molecular Level ◽  
X Ray Diffraction ◽  
Helical Polymers ◽  
X Ray ◽  
E Coli ◽  
The Past ◽  
Ordered Arrays ◽  
Low Ionic Strength

While DNA-dependent RNA polymerase represents one of the key enzymes involved in transcription and ultimately in gene expression in procaryotic and eucaryotic cells, little progress has been made towards elucidation of its 3-D structure at the molecular level over the past few years. This is mainly because to date no 3-D crystals suitable for X-ray diffraction analysis have been obtained with this rather large (MW ~500 kd) multi-subunit (α2ββ'ζ). As an alternative, we have been trying to form ordered arrays of RNA polymerase from E. coli suitable for structural analysis in the electron microscope combined with image processing. Here we report about helical polymers induced from holoenzyme (α2ββ'ζ) at low ionic strength with 5-7 mM MnCl2 (see Fig. 1a). The presence of the ζ-subunit (MW 86 kd) is required to form these polymers, since the core enzyme (α2ββ') does fail to assemble into such structures under these conditions.

Quantitative Diameter Measurements of Chromatin and TMV Fibers in the Freeze-Dried State

1988 ◽  
Vol 46 ◽  
pp. 170-171
Author(s):  
B. D. Athey ◽  
A. L. Stout ◽  
M. F. Smith ◽  
J. P. Langmore
Keyword(s):  
Reliable Method ◽  
Fiber Diameter ◽  
Quantitative Agreement ◽  
One Dimension ◽  
Fiber Axis ◽  
Two Dimensional ◽  
Fiber Density ◽  
Variable Diameter ◽  
Freeze Dried ◽  
Expected Values

Although there is general agreement that Inactive chromosome fibers consist of helically packed nucleosomes, the pattern of packing is still undetermined. Only one of the proposed models, the crossed-linker model, predicts a variable diameter dependent on the length of DNA between nucleosomes. Measurements of the fiber diameter of negatively-stained and frozen- hydrated- chromatin from Thyone sperm (87bp linker) and Necturus erythrocytes (48bp linker) have been previously reported from this laboratory. We now introduce a more reliable method of measuring the diameters of electron images of fibrous objects. The procedure uses a modified version of the computer program TOTAL, which takes a two-dimensional projection of the fiber density (represented by the micrograph itself) and projects it down the fiber axis onto one dimension. We illustrate this method using high contrast, in-focus STEM images of TMV and chromatin from Thyone and Necturus. The measured diameters are in quantitative agreement with the expected values for the crossed-linker model for chromatin structure

A new classical method for dynamical calculation in molecular systems

1997 ◽  
Vol 90 (4) ◽  
pp. 599-609 ◽  
Author(s):  
NAĐA DOSLIC ◽  
S.DANKO BOSANAC
Keyword(s):  
Classical Method ◽  
Molecular Systems ◽  
Dynamical Calculation
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