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https://www.readbyqxmd.com/read/28328213/reversible-coordination-of-boron-aluminum-zinc-magnesium-and-calcium-hydrogen-bonds-to-bent-cul2-fragments-heavy-%C3%AF-complexes-of-the-lightest-coinage-metal
#1
Alexandra Hicken, Andrew J P White, Mark R Crimmin
A series of copper(I) complexes bearing electron-deficient β-diketiminate ligands have been prepared. The study includes [{{ArNC(CR3)}2CH}Cu(η(2)-toluene)n] (Ar = Mes, R = F, n = 0.5, [12·tol]; Ar = C6F5, R = Me, n = 1, [2·tol]; Ar = 2,6-Cl2C6H3, R = H, n = 0.5, [32·tol]). Reactions of [1-3n·tol] with boranes, alanes, a zinc hydride, a magnesium hydride, and a calcium hydride generate the corresponding σ complexes ([1-3·B], [3·B'], [3·Al], [3·Al'], [1-3·Zn], [1·Mg], and [1·Ca]). These species all form reversibly, being in equilibrium with the arene solvates in solution...
March 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28286644/soldiers-as-subjects-of-medical-research-comments-on-hassidim-et-al-on-ethical-standards-of-the-israel-defense-force
#2
EDITORIAL
Asa Kasher
In 2008 a group of former soldiers of the Israel Defense Force (IDF) sued the Ministry of Defense and others, claiming they had suffered from medical problems that resulted from an IDF medical experiment in which they had participated in the 1970s. There was no compelling medical evidence with respect to causal relationships between their participation in the experiment and their later medical problems. The President of the District Court, Justice Hila Gerstl, appointed me, with the consent of the parties, to write a deposition with respect to the ethical aspects of the case...
2017: Israel Journal of Health Policy Research
https://www.readbyqxmd.com/read/28247498/an-aluminum-fluoride-complex-with-an-appended-ammonium-salt-as-an-exceptionally-active-cooperative-catalyst-for-the-asymmetric-carboxycyanation-of-aldehydes
#3
Daniel Brodbeck, Florian Broghammer, Jan Meisner, Julian Klepp, Delphine Garnier, Wolfgang Frey, Johannes Kästner, René Peters
Al-F bonds are among the most stable σ bonds known, exhibiting an even higher bond energy than Si-F bonds. Despite a stability advantage and a potentially high Lewis acidity of Al-F complexes, they have not been described as structurally defined catalysts for enantioselective reactions. We show that Al-F salen complexes with appended ammonium moieties give exceptional catalytic activity in asymmetric carboxycyanations. In addition to aromatic aldehydes, enal and aliphatic substrates are well accepted. Turnover numbers up to around 10(4) were achieved, whereas with previous catalysts 10(1) -10(2) turnovers were typically attained...
March 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28242191/comprehensive-literature-review-of-factors-influencing-medication-safety-in-nursing-homes-using-a-systems-model
#4
REVIEW
Ali Azeez Al-Jumaili, William R Doucette
OBJECTIVES: The objectives of this review were to identify the work system factors influencing medication safety measures [adverse drug events (ADEs), adverse drug reactions, or medication errors (MEs)], to determine the incidence of ADEs, and describe the most common ADEs in nursing homes (NHs). METHODS: A comprehensive literature review was conducted using PubMed and CINAHL to identify studies investigating factors that influence ADEs, adverse drug reactions, and MEs in NHs and skilled nursing facilities...
February 24, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28230869/a-combined-high-temperature-experimental-and-theoretical-kinetic-study-of-the-reaction-of-dimethyl-carbonate-with-oh-radicals
#5
Fethi Khaled, Binod Raj Giri, Milán Szőri, Tam V-T Mai, Lam K Huynh, Aamir Farooq
The reaction kinetics of dimethyl carbonate (DMC) and OH radicals were investigated behind reflected shock waves over the temperature range of 872-1295 K and at pressures near 1.5 atm. Reaction progress was monitored by detecting OH radicals at 306.69 nm using a UV laser absorption technique. The rate coefficients for the reaction of DMC with OH radicals were extracted using a detailed kinetic model developed by Glaude et al. (Proc. Combust. Inst. 2005, 30(1), 1111-1118). The experimental rate coefficients can be expressed in Arrhenius form as: kexpt'l = 5...
February 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28208780/preparation-of-constrained-geometry-titanium-complexes-of-1-2-azasilinane-framework-for-ethylene-1-octene-copolymerization
#6
Seul Lee, Seung Soo Park, Jin Gu Kim, Chung Sol Kim, Bun Yeoul Lee
The Me₂Si-bridged ansa-Cp/amido half-metallocene, [Me₂Si(η⁵-Me₄C₅)(N(t)Bu)]TiCl₂, termed a "constrained-geometry catalyst (CGC)", is a representative homogeneous Ziegler catalyst. CGC derivatives with the [1,2]azasilinane framework, in which the amide alkyl substituent is joined by the Si-bridge, were prepared, and the catalytic performances of these species was studied. Me₄C₅HSi(Me)(CH₂CH=CH₂)-NH(C(R)(R')CH=CH₂) (R, R' = H or methyl; Me₄C₅H = tetramethylcyclopentadienyl) was susceptible to ring closure metathesis (RCM) when treated with Schrock's Mo-catalyst to afford -Si(Me₄C₅H)(Me)CH₂CH=CHC(R)(R')NH- containing a six-membered ring framework...
February 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28180224/an-open-route-to-asymmetric-substituted-al-al-bonds-using-al-i-and-al-iii-precursors
#7
Bin Li, Subrata Kundu, Hongping Zhu, Helena Keil, Regine Herbst-Irmer, Dietmar Stalke, Gernot Frenking, Diego M Andrada, Herbert W Roesky
The reaction of LAl: (L = HC[C(Me)N(Ar)]2, Ar = 2,6-iPr2C6H3) and cAAC:→AlX3 (X = Cl, I) (cAAC = cyclic alkyl amino carbene) results in strikingly asymmetric Al(ii)-Al(ii) compounds LAl(X)-Al(X)2-cAAC [X = Cl (2a); I (2b)]. In these dialuminum(ii) compounds the two Al atoms bear different ligand environments. For a detailed insight into the structures, theoretical calculations were carried out.
February 9, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28179573/role-of-eruption-season-in-reconciling-model-and-proxy-responses-to-tropical-volcanism
#8
Samantha Stevenson, John T Fasullo, Bette L Otto-Bliesner, Robert A Tomas, Chaochao Gao
The response of the El Niño/Southern Oscillation (ENSO) to tropical volcanic eruptions has important worldwide implications, but remains poorly constrained. Paleoclimate records suggest an "El Niño-like" warming 1 year following major eruptions [Adams JB, Mann ME, Ammann CM (2003) Nature 426:274-278] and "La Niña-like" cooling within the eruption year [Li J, et al. (2013) Nat Clim Chang 3:822-826]. However, climate models currently cannot capture all these responses. Many eruption characteristics are poorly constrained, which may contribute to uncertainties in model solutions-for example, the season of eruption occurrence is often unknown and assigned arbitrarily...
February 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28156592/symptom-burden-and-distress-in-patients-with-cancer-in-africa
#9
(no author information available yet)
255 Background: Cancer has become a significant public health problem in Africa but still most diagnoses are made late, Sitas et al (2006). The need for palliative care is significant due to the late contact with health care providers and the many symptoms they present with. No study has been undertaken to assess symptomatology for these patients in Africa. OBJECTIVE: To study the prevalence of symptoms in patients with cancer in an African setting. METHODS: Symptom studies from records of patients with cancer referred to the Palliative Care Services at the Aga Khan University Hospital, Nairobi in 6 months...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28146180/perceptional-gaps-among-women-husbands-and-family-members-about-intentions-for-birthplace-a-cross-sectional-study
#10
Yoko Shimpuku, Frida Elikana Madeni, Shigeko Horiuchi, Sebalda Charles Leshabari
Objective: women are more likely to give birth at a health facility when their families agree with the birthplace. However, in rural areas of Tanzania, women are often marginalized from decision-making. This study predicted birthplace intention and identified factors to reduce perceptional gaps among pregnant women, husbands and family members. Method: explanatory cross-sectional survey was conducted in three villages in North Eastern Tanzania. Participants were 138 pregnant women and their families who answered the Birth Intention Questionnaire (BIQ), measuring knowledge, attitude, perceived behavioral control, subjective norms and intention for birthplace...
January 30, 2017: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/28111948/hybridization-of-zinc-oxide-tetrapods-for-selective-gas-sensing-applications
#11
O Lupan, V Postica, J Gröttrup, A K Mishra, N H de Leeuw, J F C Carreira, J Rodrigues, N Ben Sedrine, M R Correia, T Monteiro, V Cretu, I Tiginyanu, D Smazna, Y K Mishra, R Adelung
In this work, the exceptionally improved sensing capability of highly porous three-dimensional (3-D) hybrid ceramic networks toward reducing gases is demonstrated for the first time. The 3-D hybrid ceramic networks are based on doped metal oxides (MexOy and ZnxMe1-xOy, Me = Fe, Cu, Al) and alloyed zinc oxide tetrapods (ZnO-T) forming numerous junctions and heterojunctions. A change in morphology of the samples and formation of different complex microstructures is achieved by mixing the metallic (Fe, Cu, Al) microparticles with ZnO-T grown by the flame transport synthesis (FTS) in different weight ratios (ZnO-T:Me, e...
February 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28076313/ethnopharmacological-investigation-of-the-aerial-part-of-phragmites-karka-poaceae
#12
Ramiz Ahmed Sultan, Mohammad Shah Hafez Kabir, Mir Muhammad Nasir Uddin, Mohi Uddin, Zobaer Al Mahmud, Sheikh Zahir Raihan, Nazmul Qais
BACKGROUND: In this ethnopharmacological study, methanolic extract of the aerial plant parts of Phragmites karka (Family: Poaceae) and its petroleum ether and carbon tetrachloride fractions were investigated for bioactivities in Swiss-albino mice, namely, analgesic, central nervous system (CNS) depressant, hypoglycemic, and antidiarrheal activity. METHODS: The cold methanolic extract of the aerial plant parts of Phragmites karka (MEPK) was first prepared, and it was then further fractionated as petroleum ether (PEFMEPK) and carbon tetrachloride (CTFMEPK) fractions...
January 11, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28034863/huang-me-ye-yc-chen-sr-et-al-use-of-all-trans-retinoic-acid-in-the-treatment-of-acute-promyelocytic-leukemia-blood-1988-72-2-567-572
#13
(no author information available yet)
No abstract text is available yet for this article.
December 29, 2016: Blood
https://www.readbyqxmd.com/read/27986845/unique-photosynthetic-phenotypes-in-portulaca-portulacaceae-c3-c4-intermediates-and-nad-me-c4-species-with-pilosoid-type-kranz-anatomy
#14
Elena V Voznesenskaya, Nuria K Koteyeva, Gerald E Edwards, Gilberto Ocampo
Portulacaceae is a family that has considerable diversity in photosynthetic phenotypes. It is one of 19 families of terrestrial plants where species having C4 photosynthesis have been found. Most species in Portulaca are in the alternate-leaved (AL) lineage, which includes one clade (Cryptopetala) with taxa lacking C4 photosynthesis and three clades having C4 species (Oleracea, Umbraticola and Pilosa). All three species in the Cryptopetala clade lack Kranz anatomy, the leaves have C3-like carbon isotope composition and they have low levels of C4 cycle enzymes...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27986635/electrophysiological-correlates-of-motion-extrapolation-an-investigation-on-the-cnv
#15
Luca Battaglini, Clara Casco, Bethany Rose Isaacs, David Bridges, Giorgio Ganis
Motion extrapolation (ME), the ability to estimate the current position of moving objects hidden by an occluder, is critical to interact with a dynamic environment. In a typical paradigm, participants estimate time to contact (TTC) by pressing a button when they estimate the occluded moving target reaches a certain cue. Research using this paradigm has shown that motion adaptation of the occluded area produces a shift in the TTC estimate (Gilden et al., 1995). We examined the effect of motion adaptation on the contingent negative variation (CNV), a frontal electrophysiological component (Tecce, 1972) that could reflect the activity of an accumulator (Buhusi and Meck, 2005) for time processing...
December 13, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27966728/structure-investigations-of-group-13-organometallic-carboxylates
#16
Iwona Justyniak, Daniel Prochowicz, Adam Tulewicz, Wojciech Bury, Piotr Goś, Janusz Lewiński
The octet-compliant group 13 organometallics with highly polarized bonds in the metal coordination sphere exhibit a significant tendency to maximize their coordination number through the formation of adducts with a wide range of neutral donor ligands or by self-association to give aggregates containing tetrahedral and higher coordinated aluminium centres, and even in some cases molecular complexes equilibrate with ionic species of different coordination numbers of the metal centre. This work provides a comprehensive overview of the structural chemistry landscape of the group 13 carboxylates...
December 14, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27960045/tell-me-how-do-you-define-person-centredness
#17
EDITORIAL
Jan Dewing, Brendan McCormack
The International Community of Practice for Person-centred Practice (PCP-ICoP) coordinated from Queen Margaret University Edinburgh recently wrote about the current state of person-centredness across several countries in the world (McCormack et al 2015). In that publication we highlighted a number of concerns, the existence of which are working against the advancement of person-centredness as a coherent theoretically informed and practice embedded framework for nursing. We believe that a focus on person-centredness provides an opportunity for nursing to rise above particular theoretical 'fan clubs' and work within a coherent set of principles that are multivariate, context non-specific and trans-specialist...
December 13, 2016: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/27957691/speciation-and-precipitation-of-heavy-metals-in-high-metal-and-high-acid-mine-waters-from-the-iberian-pyrite-belt-portugal
#18
Nuno Durães, Iuliu Bobos, Eduardo Ferreira da Silva
Acid mine waters (AMW) collected during high- and low-flow water conditions from the Lousal, Aljustrel, and São Domingos mining areas (Iberian Pyrite Belt) were physicochemically analyzed. Speciation calculation using PHREEQC code confirms the predominance of Me(n+) and Me-SO4 species in AMW samples. Higher concentration of sulfate species (Me-SO4) than free ion species (Me(n+), i.e., Al, Fe, and Pb) were found, whereas opposite behavior is verified for Mg, Cu, and Zn. A high mobility of Zn than Cu and Pb was identified...
December 12, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27927281/iron-fe-0-rich-substrate-based-on-iron-carbon-micro-electrolysis-for-phosphorus-adsorption-in-aqueous-solutions
#19
Shihai Deng, Desheng Li, Xue Yang, Wei Xing, Jinlong Li, Qi Zhang
The phosphorus (P) adsorption properties of an iron [Fe(0)]-rich substrate (IRS) composed of iron scraps and activated carbon were investigated based on iron-carbon micro-electrolysis (IC-ME) and compared to the substrates commonly used in constructed wetlands (CWs) to provide an initial characterization of the [Fe(0)]-rich substrate. The results showed that P was precipitated by Fe(III) dissolved from the galvanic cell reactions in the IRS and the reaction was suppressed by the pH and stopped when the pH exceeded 8...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27908496/mixed-mode-acrylamide-based-continuous-beds-bearing-tert-butyl-groups-for-capillary-electrochromatography-synthesized-via-complexation-of-n-tert-butylacrylamide-with-a-water-soluble-cyclodextrin-part-i-retention-properties
#20
Ayat Allah Al-Massaedh, Ute Pyell
With the aim to improve the understanding of morphology and efficiency properties, we investigate in this series the impact of the complex formation constant of the hydrophobic monomer with respect to statistically methylated-β-cyclodextrin (Me-β-CD) on the electrochromatographic properties of highly crosslinked amphiphilic mixed-mode acrylamide-based monolithic stationary phases. Based on our previous work on amphiphilic mixed-mode monolithic stationary phases for capillary electrochromatography (CEC) using N-(1-adamantyl)acrylamide (Ad-AAm) as hydrophobic monomer that forms an extremely strong water-soluble inclusion complex with Me-β-CD, we now selected N-tert-butylacrylamide (NTBA) as hydrophobic monomer forming an inclusion complex with Me-β-CD with a much lower value of the formation constant...
December 16, 2016: Journal of Chromatography. A
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