scholarly journals Synchrotron X-ray spectroscopy for investigating vanadium speciation in marine sediment: limitations and opportunities

2018 ◽  
Vol 33 (10) ◽  
pp. 1689-1699 ◽  
Author(s):  
William W. Bennett ◽  
Enzo Lombi ◽  
Edward D. Burton ◽  
Scott G. Johnston ◽  
Peter Kappen ◽  
...  
Keyword(s):  
Marine Sediment ◽  
X Ray ◽  
Powerful Technique ◽  
Vanadium Speciation

Synchrotron-based X-ray spectroscopy is a powerful technique for investigating vanadium speciation in marine sediment.

High Resolution Study of Polytypism: Application to SiC and Au3 Mn

1982 ◽  
Vol 40 ◽  
pp. 540-541
Author(s):  
G. Van Tendeloo ◽  
J. Van Landuyt ◽  
S. Amelinckx
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Stacking Sequence ◽  
X Ray ◽  
Powerful Technique ◽  
Resolution Study ◽  
The Ideal

Polytypism has been studied for a number of years and a wide variety of stacking sequences has been detected and analysed. SiC is the prototype material in this respect; see e.g. Electron microscopy under high resolution conditions when combined with x-ray measurements is a very powerful technique to elucidate the correct stacking sequence or to study polytype transformations and deviations from the ideal stacking sequence.

scholarly journals X-ray Diffraction: A Powerful Technique for the Multiple-Length-Scale Structural Analysis of Nanomaterials

Crystals ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 87 ◽  
Author(s):  
Cinzia Giannini ◽  
Massimo Ladisa ◽  
Davide Altamura ◽  
Dritan Siliqi ◽  
Teresa Sibillano ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Length Scale ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powerful Technique ◽  
Multiple Length Scale

scholarly journals Highly Substituted Benzophenone Aldehydes and Eremophilane Derivatives from the Deep-Sea Derived Fungus Phomopsis lithocarpus FS508

Marine Drugs ◽  
2018 ◽  
Vol 16 (9) ◽  
pp. 329 ◽  
Author(s):  
Jian-Lin Xu ◽  
Hong-Xin Liu ◽  
Yu-Chan Chen ◽  
Hai-Bo Tan ◽  
Heng Guo ◽  
...  
Keyword(s):  
Cytotoxic Activity ◽  
Cell Lines ◽  
A549 Cell ◽  
Marine Sediment ◽  
Deep Sea ◽  
Crystallographic Analysis ◽  
X Ray ◽  
Naturally Occurring ◽  
Ic50 Values ◽  
New Compounds

Five new benzophenone derivatives named tenellones D–H (1–5), sharing a rare naturally occurring aldehyde functionality in this family, and a new eremophilane derivative named lithocarin A (7), together with two known compounds (6 and 8), were isolated from the deep marine sediment-derived fungus Phomopsis lithocarpus FS508. All of the structures for these new compounds were fully characterized and established on the basis of extensive spectroscopic interpretation and X-ray crystallographic analysis. Compound 5 exhibited cytotoxic activity against HepG-2 and A549 cell lines with IC50 values of 16.0 and 17.6 μM, respectively.

Coprecipitation of manganese from marine sediment pore waters for x-ray fluorescence spectrometry

1989 ◽  
Vol 222 (1) ◽  
pp. 169-175 ◽  
Author(s):  
J.M. Eckert ◽  
K.E.A. Leggett ◽  
J.B. Keene ◽  
K.L. Williams
Keyword(s):  
Marine Sediment ◽  
Fluorescence Spectrometry ◽  
Pore Waters ◽  
X Ray

Using Physics to Diagnose Cancer

2014 ◽  
Vol 09 (03) ◽  
pp. 205-224 ◽  
Author(s):  
Veronica J. James
Keyword(s):  
Vitamin B12 ◽  
Diagnostic Tests ◽  
Medical Profession ◽  
Dna Structure ◽  
X Ray Diffraction ◽  
French Mathematician ◽  
X Ray ◽  
Powerful Technique ◽  
Basic Facts ◽  
Mind Science

This discussion about diagnostic tests for cancer incorporates a powerful branch of Physics namely X-ray diffraction. Although this technique was used to solve the DNA structure using the X-ray diffraction pictures of Rosalind Franklin,1 and the structure of vitamin B12 by Dorothy Hodgkin2 and hosts of other medical related structures, it is poorly understood by the general medical profession and the community at large. To the nonphysicist the patterns appear to have no relation to the results produced. It might as well be written in Greek. The well-known quote of Poincaré, the famous French mathematician and scientist, in 1885 comes to mind: "Science is built up with facts as a house is with stones. But a collection of facts is no more a science than a heap of stones is a house." In order therefore to build a true understanding of this powerful technique it is necessary to build a firm understanding of the basic facts about this technique, so that the final results will be clear to all, as they will be held up by a firm house of knowledge. So let us take up the first stone.

Single Crystal X-Ray Structural Determination: A Powerful Technique for Natural Products Research and Drug Discovery

2012 ◽  
Vol 545 ◽  
pp. 3-15
Author(s):  
Hoong Kun Fun ◽  
Suchada Chantrapromma ◽  
Nawong Boonnak
Keyword(s):  
Natural Products ◽  
Drug Discovery ◽  
Single Crystal ◽  
Natural Product ◽  
Structure Determination ◽  
Three Dimensional ◽  
X Ray ◽  
Powerful Technique ◽  
Determination Of Absolute Configuration

Drug discovery from natural products resources have been extensively studied. The most important step in the discovery process is the identification of compounds with interesting biological activity. Single crystal X-ray structure determination is a powerful technique for natural products research and drug discovery in which the detailed three-dimensional structures that emerge can be co-related to the activities of these structures. This article shall present (i) co-crystal structures, (ii) determination of absolute configuration and (iii) the ability to distinguish between whether a natural product compound is a natural product or a natural product artifact. All these three properties are unique to the technique of single crystal X-ray structure determination.

Analysis of heavy metals in marine sediment using a portable X-ray fluorescence spectrometer onboard an Autonomous Underwater Vehicle

2012 ◽  
Author(s):  
Jeremy Breen ◽  
Paulo de Souza ◽  
Greg Timms ◽  
John McCulloch ◽  
Robert Ollington
Keyword(s):  
Heavy Metals ◽  
Marine Sediment ◽  
Autonomous Underwater Vehicle ◽  
Underwater Vehicle ◽  
X Ray ◽  
Fluorescence Spectrometer

X-ray absorption near-edge structure micro-spectroscopy study of vanadium speciation in Phycomyces blakesleeanus mycelium

2015 ◽  
Vol 407 (24) ◽  
pp. 7487-7496 ◽  
Author(s):  
Milan Žižić ◽  
Tanja Dučić ◽  
Daniel Grolimund ◽  
Danica Bajuk-Bogdanović ◽  
Miroslav Nikolic ◽  
...  
Keyword(s):  
Spectroscopy Study ◽  
Phycomyces Blakesleeanus ◽  
Edge Structure ◽  
X Ray ◽  
Vanadium Speciation ◽  
X Ray Absorption

Rhenium carbonyl complexes bearing methylated triphenylphosphonium cations as antibody-free mitochondria trackers for X-ray fluorescence imaging

2021 ◽  
Author(s):  
Gabrielle Schanne ◽  
Lucas Henry ◽  
How Chee Ong ◽  
andrea somogyi ◽  
Kadda Medjoubi ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Metal Complexes ◽  
Fluorescence Imaging ◽  
Biological Systems ◽  
Carbonyl Complexes ◽  
X Ray ◽  
Powerful Technique ◽  
Rhenium Carbonyl

Synchrotron Radiation X-ray Fluorescence (SXRF) imaging is a powerful technique for the visualization of metal complexes in biological systems. However, due to the lack of an endogenous elemental signature for...

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