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Manor, Ilan The Korean Association for Public Diplomacy 2021 Journal of public diplomacy Vol.1 No.2
This study argues that scholars lack an adequate conceptualization of the strategic use of social media framing by Ministries of Foreign Affairs (MFAs) during crises. As a theoretical starting point, this article employs the concept of soft disempowerment to suggest that MFAs may use online framing to limit an adversary's range of possible actions during a crisis by depicting that adversary as violating norms and values deemed desirable by the international community. Next, the article introduces the concept of mutually assured delegitimization (MAD), which suggests that actors may call into question one another's adherence with certain norms and values during crises, which results in the mutual depletion of soft power resources. Importantly, this article proposes a novel, methodological approach for the analysis of individual tweets during crises. To illustrate its methodological and conceptual innovations, the study analyzes tweets published by the MFAs of the United States (US) and Russia during the Crimea crisis and demonstrates that both MFAs used Twitter to negatively frame each other by calling their morals into question, which resulted in MAD.
Structural elucidation of a mononuclear titanium methylidene
Grant, L.,Ahn, S.,Manor, B.,Baik, M. H.,Mindiola, D. Royal Society of Chemistry 2017 Chemical communications Vol.53 No.24
<P>The first example of a structurally characterized titanium methylidene, (PN)(2)Ti=CH2, has been prepared via one-electron oxidation of (PN)(2)Ti(CH3) followed by deprotonation or by H-atom abstraction using an aryloxyl radical. The Ti=C distance was found to be 1.939(3) angstrom, and variable temperature, multinuclear, and multidimensional NMR spectroscopic experiments revealed the methylidene to engage in long range interactions with protons on the ligand framework. Computational studies showed that the Ti=C bond, which until now has eluded structural studies, displays all the hallmarks of a prototypical Schrock-carbene.</P>
Proteomic Analysis Demonstrates Activator- and Chromatin-specific Recruitment to Promoters
Sikorski, Timothy W.,Joo, Yoo Jin,Ficarro, Scott B.,Askenazi, Manor,Buratowski, Stephen,Marto, Jarrod A. American Society for Biochemistry and Molecular Bi 2012 The Journal of biological chemistry Vol.287 No.42
<P>In-depth characterization of RNA polymerase II preinitiation complexes remains an important and challenging goal. We used quantitative mass spectrometry to explore context-dependent <I>Saccharomyces cerevisiae</I> preinitiation complex formation at the <I>HIS4</I> promoter reconstituted on naked and chromatinized DNA templates. The transcription activators Gal4-VP16 and Gal4-Gcn4 recruited a limited set of chromatin-related coactivator complexes, namely the chromatin remodeler Swi/Snf and histone acetyltransferases SAGA and NuA4, suggesting that transcription stimulation is mediated through these factors. Moreover, the two activators differentially recruited the coactivator complexes, consistent with specific activator-coactivator interactions. Chromatinized templates suppressed recruitment of basal transcription factors, thereby amplifying the effect of activators, compared with naked DNA templates. This system is sensitive, highly reproducible, and easily applicable to mapping the repertoire of proteins found at any promoter.</P>
Solowey, Douglas P.,Mane, Manoj V.,Kurogi, Takashi,Carroll, Patrick J.,Manor, Brian C.,Baik, Mu-Hyun,Mindiola, Daniel J. Nature Publishing Group 2017 Nature chemistry Vol.9 No.11
Selectively converting linear alkanes to α-olefins under mild conditions is a highly desirable transformation given the abundance of alkanes as well as the use of olefins as building blocks in the chemical community. Until now, this reaction has been primarily the remit of noble-metal catalysts, despite extensive work showing that base-metal alkylidenes can mediate the reaction in a stoichiometric fashion. Here, we show how the presence of a hydrogen acceptor, such as the phosphorus ylide, when combined with the alkylidene complex (PNP)Ti=CH<SUP>t</SUP>Bu(CH<SUB>3</SUB>) (PNP=N[2-P(CHMe<SUB>2</SUB>)<SUB>2</SUB>-4-methylphenyl]<SUB>2</SUB><SUP>−</SUP>), catalyses the dehydrogenation of cycloalkanes to cyclic alkenes, and linear alkanes with chain lengths of C<SUB>4</SUB> to C<SUB>8</SUB> to terminal olefins under mild conditions. This Article represents the first example of a homogeneous and selective alkane dehydrogenation reaction using a base-metal titanium catalyst. We also propose a unique mechanism for the transfer dehydrogenation of hydrocarbons to olefins and discuss a complete cycle based on a combined experimental and computational study.
Mullane, Kimberly C.,Ryu, Ho,Cheisson, Thibault,Grant, Lauren N.,Park, Ji Young,Manor, Brian C.,Carroll, Patrick J.,Baik, Mu-Hyun,Mindiola, Daniel J.,Schelter, Eric J. American Chemical Society 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.36
<P>Uranium complexes in the +3 and +4 oxidation states were prepared using the anionic PN<SUP>-</SUP> (PN<SUP>-</SUP> = (<I>N</I>-(2-(diisopropylphosphino)-4-methylphenyl)-2,4,6-trimethylanilide) ligand framework. New complexes include the halide starting materials, (PN)<SUB>2</SUB>U<SUP>III</SUP>I (<B>1</B>) and (PN)<SUB>2</SUB>U<SUP>IV</SUP>Cl<SUB>2</SUB> (<B>2</B>), which both yield (PN)<SUB>2</SUB>U<SUP>IV</SUP>(N<SUB>3</SUB>)<SUB>2</SUB> (<B>3</B>) by reaction with NaN<SUB>3</SUB>. Compound <B>3</B> was reduced with potassium graphite to produce a putative, transient uranium-nitrido moiety that underwent an intramolecular C-H activation to form a rare example of a parent imido complex, [K(THF)<SUB>3</SUB>][(PN)U<SUP>IV</SUP>(═NH)[<SUP><I>i</I></SUP>Pr<SUB>2</SUB>P(C<SUB>6</SUB>H<SUB>3</SUB>Me)N(C<SUB>6</SUB>H<SUB>2</SUB>Me<SUB>2</SUB>CH<SUB>2</SUB>)]] (<B>4</B>). Calculated reaction energy profiles strongly suggest that a C-H insertion becomes unfavorable when a reductant is present, offering a distinctively different reaction pathway than previously observed for other uranium nitride complexes.</P> [FIG OMISSION]</BR>