Cell Phone Information Seeking Explains Blood Pressure in African American Women

Although cell phone use and Internet access via cell phone is not marked by racial disparities, little is known about how cell phone use relates to blood pressure and health information seeking behaviors. The purposes of this study were to (a) describe Internet activities, cell phone use, and information seeking; (b) determine differences in blood pressure and information seeking between cell phone information seekers and nonseekers; and (c) examine cell phone information seeking as a predictor of blood pressure in African American women. Participants ( N = 147) completed a survey and had their blood pressure measured. Independent-sample t tests showed a significant difference in systolic blood pressure in cell phone information seekers and nonseekers. Linear regression revealed cell phone information seeking as an independent predictor of systolic blood pressure, despite confounders. It is possible that cell phone information seekers were using health information to make decisions about self-management of blood pressure

Phosphorus cations and bulky cyclopentadienyl ligands

xix, 164 leaves : ill. ; 29 cmIncludes abstract.Includes bibliographical references.The synthesis and characterisation of some ethynylphosphonium salts are described starting from 1-bromo-2-phenylacetylene and tertiary phosphines. Structural information for these molecules has been obtained using X-ray crystallography, and deviant reactivity was observed at elevated temperatures when the electron-rich tris(2,4,6-trimethoxyphenyl)phosphine was employed. A new approach to the corresponding 1,4-bis(ethynylphosphonium) salts was also developed by a similar reaction, and the first bis(ethynylphosphonium) salts were characterised using X-ray crystallography. Exploratory research into the synthesis of m-terphenyl substituted cyclopentadienyl ligands (Ter[superscript Mes]Cp and Ter[superscript Dipp]Cp) is also described. A new synthetic route is presented and is accomplished through the reaction of aryl lithium reagents with cobaltocenium salts, followed by oxidation of the intermediate cobalt(I) species to afford the corresponding cyclopentadiene. The preparation, structural, and spectroscopic properties of the alkali metal salts (Li–Cs) is described, and some preliminary coordination chemistry is presented

Collaborative Inter-relational Healthcare Research: A Conceptual Framework Informed by a Qualitative Enquiry

Background: Interprofessional education is an important precursor to developing collaborative interprofessional healthcare teams. Both have been studied extensively. Less is known about factors contributing to successful interprofessional research. This study examined the perspectives of members of an interprofessional healthcare research team regarding their involvement as research team members.Methods & Findings: Phase 1: Semi-structured one-on-one interviews were conducted with research team members. Interviews were audiotaped and transcribed verbatim. Each transcript was analyzed using a comparative contrast approach. Concepts emerging from the data were categorized broadly under the following themes: raison d’être, key elements of an interprofessional research team, communication, unavoidable logistics, and what is the value? Phase 2: Upon completion of the analysis, a preliminary conceptual framework for conducting interprofessional healthcare research was proposed and presented to the research team. Phase 3: A validation process was undertaken to further define the framework.Conclusions: Key components of the conceptual framework included values (trust, respect for each other, and common interest[s]) and structural prerequisites (expertise in the topic area, funding, team leadership time, associated workload, organized and co-ordinated management, and forums for multi-modal communication)

Highly ordered N-heterocyclic carbene monolayers on Cu(111)

EA and FG acknowledge funding from EPSRC grants (EA: EP/R512199/1; FG: EP/S027270/1). We thank the EaStCHEM for computational support via the EaStCHEM Research Computing facility. CMC thanks the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Canada Foundation for Innovation (CFI) for funding of the work from her lab described in this article. AJV acknowledges NSERC for a Vanier scholarship and the Walter C. Sumner foundation for additional financial support. IS acknowledges Queen’s University for the RT Mohan Scholarship and the Ontario government for an Ontario Graduate Scholarship.The benzannulated N-heterocyclic carbene, 1,3-dibenzylbenzimidazolylidene (NHCDBZ) forms large, highly ordered domains when adsorbed on Cu(111) under ultrahigh vacuum conditions. A combination of scanning tunnelling microscopy (STM), high resolution electron energy loss spectroscopy (HREELS) and density functional theory (DFT) calculations reveals that the overlayer consists of vertical benzannulated NHC moieties coordinating to Cu adatoms. Long range order results from the placement of the two benzyl substituents on opposite sides of the benzimidazole moiety, with their aromatic rings approximately parallel to the surface. The organization of three surface-bound benzyl substituents from three different NHCs into a triangular array controls the formation of a highly ordered Kagome-like surface lattice. By comparison with earlier studies of NHCs on Cu(111), we show that the binding geometry and self-assembly of NHCDBZ are influenced by intermolecular and adsorbate-substrate interactions and facilitated by the flexibility of the methylene linkage between the N-heterocycle and the aromatic wingtip substituents.Publisher PDFPeer reviewe

Ortho-semantic learning of novel words: An event-related potential study of grade 3 children

Introduction: As children become independent readers, they regularly encounter new words whose meanings they must infer from context, and whose spellings must be learned for future recognition. The self-teaching hypothesis proposes orthographic learning skills are critical in the transition to fluent reading, while the lexical quality hypothesis further emphasizes the importance of semantics. Event-related potential (ERP) studies of reading development have focused on effects related to the N170 component—print tuning (letters vs. symbols) and lexical tuning (real words vs. consonant strings)—as well as the N400 reflecting semantic processing, but have not investigated the relationship of these components to word learning during independent reading. Methods: In this study, children in grade 3 independently read short stories that introduced novel words, then completed a lexical decision task from which ERPs were derived. Results: Like real words, newly-learned novel words evoked a lexical tuning effect, indicating rapid establishment of orthographic representations. Both real and novel words elicited significantly smaller N400s than pseudowords, suggesting that semantic representations of the novel words were established. Further, N170 print tuning predicted accuracy on identifying the spellings of the novel words, while the N400 effect for novel words was associated with reading comprehension. Discussion: Exposure to novel words during self-directed reading rapidly establishes neural markers of orthographic and semantic processing. Furthermore, the ability to rapidly filter letter strings from symbols is predictive of orthographic learning, while rapid establishment of semantic representations of novel words is associated with stronger reading comprehension

Crystal structure of 2-azido-1,3-bis(2,6-diiso- propylphenyl)-1,3,2-diazaphospholidine

Published VersionThe title compound, C26H38N5P, was synthesized by reacting 2-chloro-1,3- bis(2,6-diisopropylphenyl)-1,3,2-diazaphospholidine with sodium azide and a catalytic amount of lithium chloride in tetrahydrofuran. The title compound is the first structurally characterized 2-azido-1,3,2-diazaphospholidine and exhibits a P atom in a trigonal pyramidal geometry. The azide P—N bond length of 1.8547 (16) A ̊ is significantly longer than the P—N separations for the chelating diamine [P—N = 1.6680 (15) and 1.6684 (14) A ̊ ]. The sterically hindered 2,6- diisopropylphenyl groups twist away from the central heterocycle, with dihedral angles between the central heteocyclic ring and benzene rings of 76.17 (10) and 79.74 (9) . In the crystal, a weak C—H...N link to the terminal N atom of the azide group leads to [100] chains

Crystal structure of 2-chloro-1,3-bis(2,6-diiso- propylphenyl)-1,3,2-diazaphospholidine 2-oxide

Published versionThe title compound, C26H38ClN2OP, was synthesized by reacting phosphoryl chloride with N,N′-bis­(2,6-diiso­propyl­phen­yl)ethane-1,2-di­amine in the presence of N-methyl­morpholine which acted as an auxilliary base to quench the HCl released as a by-product. The resultant N-heterocyclic phosphine five-membered ring adopts a half-chair conformation and features a tetra­coordinate P atom ligated by the chelating di­amine [P—N = 1.6348 (14) and 1.6192 (14) Å], one double-bonded O atom [P1—O1 = 1.4652 (12) Å] and one Cl atom [P1—Cl1 = 2.0592 (7) Å]. The sterically hindered 2,6-diiso­propyl­phenyl (Dipp) groups twist away from the central heterocycle, with torsion angles of −75.66 (19) and 83.39 (19)° for the P—N—Car—Car links. A number of intra­molecular C—H...N, C—H...O and C—H...Cl close contacts occur. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds to generate [010] chains. C—H...Π inter­actions are also observed

N-heterocyclic carbenes reduce and functionalize copper oxide surfaces in one pot

The Natural Sciences and Engineering Research Council of Canada (NSERC) and the Canada Foundation for Innovation (CFI) are thanked for financial support of this work in terms of operating and equipment grants to CMC and JHH. AJV and MRN thank the Ontario government for OGS fellowships. AJV thanks NSERC for a Vanier Scholarship and also the Walter C. Sumner foundation for additional scholarship support.Benzimidazolium hydrogen carbonate salts have been shown to act as N-heterocyclic carbene precursors which can remove oxide from copper oxide surfaces and functionalize the resulting metallic surfaces in a single step. Both the surfaces and the etching products are fully characterized by spectroscopic methods. Analysis of surfaces before and after NHC treatment by X-ray photoelectron spectroscopy demonstrates the complete removal of copper(II) oxide. Using 13C-labelling, we determine that the products of this transformation include a cyclic urea, a ring-opened formamide and a bis-carbene copper(I) complex. These results illustrate the potential of NHCs to functionalize a much broader class of metals, including those prone to oxide treatment, greatly facilitating the preparation of NHC-based films on metals other than gold.PostprintPeer reviewe

Crystal Structure of Bis(2,4,6-trimethylphenyl)-phosphine Oxide

Published VersionThe single crystal structure of bis(2,4,6-trimethylphenyl) phosphine oxide has been determined. All interatomic distances and angles can be considered normal. The aryl substituents adopt an intermediate configuration when compared to both sterically unhindered (e.g., diphenylphosphine oxide) and congested (e.g., bis(2,4,6-tri-tert-butylphenyl)phosphine oxide) secondary phosphine oxides, illustrating the influence of steric congestion on the molecular structure