Academic literature on the topic 'X-Ray Crystallographic Evidence'

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Journal articles on the topic "X-Ray Crystallographic Evidence"

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BANI, TALAPATRA, POREL ABHIJIT, BISWAS KALLOLMAY, and KUMAR TALAPATRA SUNIL. "Absolute Configurations of Goniodiol, Goniodiol Monoacetate and Other Related Dihydropyrones from Synthetic, Circular Dichroism and X-Ray Crystallographic Evidence." Journal of Indian Chemical Society Vol. 74, Nov-Dec 1997 (1997): 896–903. https://doi.org/10.5281/zenodo.5900460.

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Centre of Advanced Studies on Natural Products, Department of Chemistry, University College of Science, 92 Acharya Prafulla Chandra Road, Calcutta-700 009 <em>Manuscript received 10 September 1997</em> The absolute configuration of (+)-goniodiol [6-(7,8-dibydro-7,8-dihydroxystyryi)-5,6-dibydro-2-pyrone] (3) has been unambiguously and independently determined and revised as 7(<em>R</em>),8(<em>R</em>) from the circular dithroism (CD) studies of the diol and its dibenzoate. The 6(<em>R</em>) configuration that follows from its already reported 6,1<em>-threo</em> configuration is also confirmed b
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Kohn, Jonathan E., Pavel V. Afonine, Jory Z. Ruscio, Paul D. Adams, and Teresa Head-Gordon. "Evidence of Functional Protein Dynamics from X-Ray Crystallographic Ensembles." PLoS Computational Biology 6, no. 8 (2010): e1000911. http://dx.doi.org/10.1371/journal.pcbi.1000911.

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Shyshov, Oleksandr, Kevin Andre Siewerth, and Max von Delius. "Evidence for anion-binding of all-cis hexafluorocyclohexane in solution and solid state." Chemical Communications 54, no. 34 (2018): 4353–55. http://dx.doi.org/10.1039/c8cc01797b.

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Borshchevskiy, Valentin, Ekaterina Round, Ivan Erofeev, et al. "Low-dose X-ray radiation induces structural alterations in proteins." Acta Crystallographica Section D Biological Crystallography 70, no. 10 (2014): 2675–85. http://dx.doi.org/10.1107/s1399004714017295.

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X-ray-radiation-induced alterations to protein structures are still a severe problem in macromolecular crystallography. One way to avoid the influence of radiation damage is to reduce the X-ray dose absorbed by the crystal during data collection. However, here it is demonstrated using the example of the membrane protein bacteriorhodopsin (bR) that even a low dose of less than 0.06 MGy may induce structural alterations in proteins. This dose is about 500 times smaller than the experimental dose limit which should ideally not be exceeded per data set (i.e.30 MGy) and 20 times smaller than previo
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Pirkle, William H., Patrick G. Murray, and Scott R. Wilson. "X-ray Crystallographic Evidence in Support of a Proposed Chiral Recognition Mechanism." Journal of Organic Chemistry 61, no. 14 (1996): 4775–77. http://dx.doi.org/10.1021/jo9512564.

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Tirkkonen, B., A. Aukrust, E. Couture, et al. "Physicochemical characterisation of mangafodipir trisodium." Acta Radiologica 38, no. 5 (1997): 780–89. http://dx.doi.org/10.1080/02841859709172411.

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Purpose: To determine the structure and various physicochemical properties of man-gafodipir (MnDPDP) trisodium, the active ingredient of Teslascan, a new organ-specific contrast medium for MR imaging. Material and Methods: The structure of MnDPDP trisodium crystals was determined by X-ray crystallography. The possible existence of polymorphism in MnDPDP trisodium was evaluated by powder X-ray diffraction, optical microscopy, thermal analysis and IR spectroscopy. In addition, various spectroscopic techniques and physicochemical measurements were used for characterisation of MnDPDP trisodium. Re
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Pantazis, Dimitrios A. "The S3 State of the Oxygen-Evolving Complex: Overview of Spectroscopy and XFEL Crystallography with a Critical Evaluation of Early-Onset Models for O–O Bond Formation." Inorganics 7, no. 4 (2019): 55. http://dx.doi.org/10.3390/inorganics7040055.

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The catalytic cycle of the oxygen-evolving complex (OEC) of photosystem II (PSII) comprises five intermediate states Si (i = 0–4), from the most reduced S0 state to the most oxidized S4, which spontaneously evolves dioxygen. The precise geometric and electronic structure of the Si states, and hence the mechanism of O–O bond formation in the OEC, remain under investigation, particularly for the final steps of the catalytic cycle. Recent advances in protein crystallography based on X-ray free-electron lasers (XFELs) have produced new structural models for the S3 state, which indicate that two of
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Katritzky, Alan R., Peter J. Steel, and Sergey N. Denisenko. "X-Ray crystallographic evidence for a vinylogous anomeric effect in benzotriazole-substituted heterocycles." Tetrahedron 57, no. 16 (2001): 3309–14. http://dx.doi.org/10.1016/s0040-4020(01)00218-6.

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Cherrier, Mickaël V., Patricia Amara, Barisa Talbi, Michèle Salmain, and Juan C. Fontecilla-Camps. "Crystallographic evidence for unexpected selective tyrosine hydroxylations in an aerated achiral Ru–papain conjugate." Metallomics 10, no. 10 (2018): 1452–59. http://dx.doi.org/10.1039/c8mt00160j.

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Eckhardt, Tamira, Richard Goddard, Christoph Lehmann, et al. "Crystallographic evidence for unintended benzisothiazolinone 1-oxide formation from benzothiazinones through oxidation." Acta Crystallographica Section C Structural Chemistry 76, no. 9 (2020): 907–13. http://dx.doi.org/10.1107/s2053229620010931.

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1,3-Benzothiazin-4-ones (BTZs) are a promising new class of drugs with activity against Mycobacterium tuberculosis, which have already reached clinical trials. A product obtained in low yield upon treatment of 8-nitro-2-(piperidin-1-yl)-6-(trifluoromethyl)-4H-benzothiazin-4-one with 3-chloroperbenzoic acid, in analogy to a literature report describing the formation of sulfoxide and sulfone derived from BTZ043 [Tiwari et al. (2015). ACS Med. Chem. Lett. 6, 128–133], is a ring-contracted benzisothiazolinone (BIT) 1-oxide, namely, 7-nitro-2-(piperidine-1-carbonyl)-5-(trifluoromethyl)benzo[d]isoth
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Book chapters on the topic "X-Ray Crystallographic Evidence"

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Egli, Martin. "DNA and RNA Structure." In Nucleic Acids in Chemistry and Biology. The Royal Society of Chemistry, 2022. http://dx.doi.org/10.1039/9781837671328-00020.

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This chapter explores the foundational principles of the conformations of nucleosides, nucleotides and oligonucleotides and the structures of the various double-helical, three-stranded and four-stranded DNA molecules as well as the expanding universe of RNA tertiary structural motifs. At the lower end of the molecular scale, the pursuit of novel nucleoside and nucleotide analogues with antiviral activity and as building blocks for oligonucleotides against a multitude of therapeutic targets requires the steady generation of new structural information to guide synthetic efforts to improve drug p
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Conference papers on the topic "X-Ray Crystallographic Evidence"

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Swalla, Dana R., and Richard W. Neu. "Role of Misorientation in Assessing Fretting Damage." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63313.

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The primary focus of the current work is to develop quantifying measures that can describe the evolution of fretting damage at the microstructural scale in a dual phase Ti-6Al-4V as well as two single phase materials: commercially pure titanium (CP-Ti), which consists of pure alpha-phase titanium, and a near alpha Ti-5Al-2.5Sn. It is important to understand deformation behavior at the microstructural scale in heterogeneous materials because features at this scale, such as grain size, crystallographic orientation, and phase distribution, strongly influence crack development and are dimensionall
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Ma, Shi-Ning, De-Ma Ba, Chang-Qing Li, and Fan-Jun Meng. "Fabrication and Characterization of Nanostructured Surface Layer of 38CrSi Steel." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21154.

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A nanocrystalline surface layer was fabricated on a 38CrSi Steel with tempered sorbite structure by using Supersonic Fine Particles Bombarding (SFPB). The microstructural evolution of SFPB-treated specimens under different processing conditions was characterized by using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Experimental evidence showed severe plastic deformation and obvious grains refinement were observed and a nanocrystalline surface layer (grain size &lt; 100nm) was found after SFPB treatment. The thickness of nanostructured surface layer vari
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Kumar, Pushpinder, Ravinder Singh Joshi, and Rohit Kumar Singla. "Mechanical and Metallurgical Characterization of Ultrafine Grained Titanium Laminates Developed by LSEM." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-85839.

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Abstract Titanium alloy sheets find its broad use in the automotive, biomedical, and aerospace industries. One of the most demanding role of these sheets is in making of Ti/GFRP based stacked composites. Production of Titanium laminates for this application is difficult and expensive than other metals due to the challenges of multipass processing with intermediate annealing. In the present research work, ultrafine titanium laminates are fabricated through novel technique based on large strain extrusion machining in a single pass. Laminates were produced from Ti-6Al-4V and pure titanium (CP-Ti)
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