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https://www.readbyqxmd.com/read/27933749/black-magic-in-gray-titania-noble-metal-free-photocatalytic-h2-evolution-from-hydrogenated-anatase
#1
Ning Liu, Xuemei Zhou, Nhat Truong Nguyen, Kristina Peters, Florian Zoller, Imgon Hwang, Christopher Schneider, Matthias E Miehlich, Detlef Freitag, Karsten Meyer, Dina Fattakhova-Rohlfing, Patrik Schmuki
'Black' TiO2 -in the widest sense, TiO2 reduced by various treatments-has attracted tremendous scientific interest in recent years because of some outstanding properties; most remarkably in photocatalysis. While the material effects visible light absorption (the blacker, the better), black titania produced by high pressure hydrogenation was recently reported to show another highly interesting feature; noble-metal-free photocatalytic H2 generation. In a systematic investigation of high-temperature hydrogen treatments of anatase nanoparticles, TEM, XRD, EPR, XPS, and photoelectrochemistry are used to characterize different degrees of surface hydrogenation, surface termination, electrical conductivity, and structural defects in the differently treated materials...
December 9, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27931778/a-magic-spot-in-genome-maintenance
#2
REVIEW
Aviram Rasouly, Bibhusita Pani, Evgeny Nudler
Nucleotide excision repair (NER) is the key DNA repair system that eliminates the majority of DNA helix-distorting lesions. RNA polymerase (RNAP) expedites the recognition of DNA damage by NER components via transcription-coupled DNA repair (TCR). In bacteria, a modified nucleotide ppGpp ('magic spot') is a pleiotropic second messenger that mediates the response to nutrient deficiencies by altering the initiation properties of RNAP. In this review, we discuss newly elucidated roles of guanosine 5'-diphosphate 3'-diphosphate (ppGpp) in transcription elongation that couple this alarmone to DNA damage repair and maintenance...
December 5, 2016: Trends in Genetics: TIG
https://www.readbyqxmd.com/read/27926956/-80-years-the-magic-mountain-by-thomas-mann
#3
C Virchow
No abstract text is available yet for this article.
December 2016: Pneumologie
https://www.readbyqxmd.com/read/27924967/researchgate-is-no-longer-reliable-leniency-towards-ghost-journals-may-decrease-its-impact-on-the-scientific-community
#4
Aamir Raoof Memon
ResearchGate has been regarded as one of the most attractive academic social networking site for scientific community. It has been trying to improve user-centered interfaces to gain more attractiveness to scientists around the world. Display of journal related scietometric measures (such as impact factor, 5-year impact, cited half-life, eigenfactor) is an important feature in ResearchGate. Open access publishing has added more to increased visibility of research work and easy access to information related to research...
December 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27918141/structure-and-fluxionality-of-b13-probed-by-infrared-photodissociation-spectroscopy
#5
Matias R Fagiani, Xiaowei Song, Petko Petkov, Sreekanta Debnath, Sandy Gewinner, Wieland Schöllkopf, Thomas Heine, André Fielicke, Knut R Asmis
We use cryogenic ion vibrational spectroscopy to characterize the structure and fluxionality of the magic number boron cluster B13(+) . The infrared photodissociation (IRPD) spectrum of the D2 -tagged all-(11) B isotopologue of B13(+) is reported in the spectral range from 435 to 1790 cm(-1) and unambiguously assigned to a planar boron double wheel structure based on a comparison to simulated IR spectra of low energy isomers from density-functional-theory (DFT) computations. Born-Oppenheimer DFT molecular dynamics simulations show that B13(+) exhibits internal quasi-rotation already at 100 K...
December 5, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27916437/animal-testing-is-still-the-best-way-to-find-new-treatments-for-patients
#6
Silvio Garattini, Giuliano Grignaschi
Experimental research proceeds by hypotheses formulated on the basis of previous or new knowledge and then tested. If they are accepted, they serve as the basis for further hypotheses, and if they are rejected new hypotheses can be developed. In other words, when we are at the frontiers of knowledge the path is forged by "trial and error". When a trial shows a hypothesis is wrong, this is a step toward making fewer errors. This process also applies to drug development. There is no magic formula at present to predict - at the pre-clinical level - the therapeutic value of a drug for people with a disease...
December 1, 2016: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/27910557/a-storage-ring-experiment-to-detect-a-proton-electric-dipole-moment
#7
V Anastassopoulos, S Andrianov, R Baartman, S Baessler, M Bai, J Benante, M Berz, M Blaskiewicz, T Bowcock, K Brown, B Casey, M Conte, J D Crnkovic, N D'Imperio, G Fanourakis, A Fedotov, P Fierlinger, W Fischer, M O Gaisser, Y Giomataris, M Grosse-Perdekamp, G Guidoboni, S Hacıömeroğlu, G Hoffstaetter, H Huang, M Incagli, A Ivanov, D Kawall, Y I Kim, B King, I A Koop, D M Lazarus, V Lebedev, M J Lee, S Lee, Y H Lee, A Lehrach, P Lenisa, P Levi Sandri, A U Luccio, A Lyapin, W MacKay, R Maier, K Makino, N Malitsky, W J Marciano, W Meng, F Meot, E M Metodiev, L Miceli, D Moricciani, W M Morse, S Nagaitsev, S K Nayak, Y F Orlov, C S Ozben, S T Park, A Pesce, E Petrakou, P Pile, B Podobedov, V Polychronakos, J Pretz, V Ptitsyn, E Ramberg, D Raparia, F Rathmann, S Rescia, T Roser, H Kamal Sayed, Y K Semertzidis, Y Senichev, A Sidorin, A Silenko, N Simos, A Stahl, E J Stephenson, H Ströher, M J Syphers, J Talman, R M Talman, V Tishchenko, C Touramanis, N Tsoupas, G Venanzoni, K Vetter, S Vlassis, E Won, G Zavattini, A Zelenski, K Zioutas
A new experiment is described to detect a permanent electric dipole moment of the proton with a sensitivity of 10(-29) e ⋅ cm by using polarized "magic" momentum 0.7 GeV/c protons in an all-electric storage ring. Systematic errors relevant to the experiment are discussed and techniques to address them are presented. The measurement is sensitive to new physics beyond the standard model at the scale of 3000 TeV.
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27906922/the-effectiveness-of-hyperbaric-oxygen-therapy-hbot-in-radiation-induced-haemorrhagic-cystitis
#8
Vincent Chong, Michael Rice
INTRODUCTION: Radiation cystitis is one of the possible complications from pelvic radiotherapy. Hyperbaric oxygen (HBOT) improves tissue oxygenation and healing of scarred tissue. AIMS: To assess the efficacy of hyperbaric oxygen therapy (HBOT) in the management of radiation-induced haemorrhagic cystitis in patients with urological cancers. METHODS: This is a retrospective review on all patients with macroscopic haematuria secondary to radiation induced haemorrhagic cystitis who were treated with hyperbaric oxygen therapy (HBOT) between 2009 and 2013...
December 2, 2016: New Zealand Medical Journal
https://www.readbyqxmd.com/read/27905655/-gastrointestinal-bezoars
#9
Ricardo Espinoza González
Gastrointestinal bezoars are a concretion of indigested material that can be found in the gastrointestinal tract of humans and some animals. This material forms an intraluminal mass, more commonly located in the stomach. During a large period of history animal bezoars were considered antidotes to poisons and diseases. We report a historical overview since bezoars stones were thought to have medicinal properties. This magic conception was introduced in South America by Spanish conquerors. In Chile, bezoars are commonly found in a camelid named guanaco (Lama guanicoe)...
August 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/27903957/medicalisation-smoking-and-e-cigarettes-evidence-and-implications
#10
Kylie Morphett, Adrian Carter, Wayne Hall, Coral Gartner
There is debate in the tobacco control literature about the value of a medical model in reducing smoking-related harm. The variety of medical treatments for smoking cessation has increased, health professionals are encouraged to use them to assist smoking cessation and tobacco dependence is being described as a 'chronic disease'. Some critics suggest that the medicalisation of smoking undermines the tobacco industry's responsibility for the harms of smoking. Others worry that it will lead smokers to deny personal responsibility for cessation, create beliefs in 'magic bullets' for smoking cessation, or erode smokers' confidence in their ability to quit...
November 30, 2016: Tobacco Control
https://www.readbyqxmd.com/read/27903327/auditory-vigilance-and-working-memory-in-youth-at-familial-risk-for-schizophrenia-or-affective-psychosis-in-the-harvard-adolescent-family-high-risk-study
#11
Larry J Seidman, Andrea Pousada-Casal, Silvia Scala, Eric C Meyer, William S Stone, Heidi W Thermenos, Elena Molokotos, Jessica Agnew-Blais, Ming T Tsuang, Stephen V Faraone
BACKGROUND: The degree of overlap between schizophrenia (SCZ) and affective psychosis (AFF) has been a recurring question since Kraepelin's subdivision of the major psychoses. Studying nonpsychotic relatives allows a comparison of disorder-associated phenotypes, without potential confounds that can obscure distinctive features of the disorder. Because attention and working memory have been proposed as potential endophenotypes for SCZ and AFF, we compared these cognitive features in individuals at familial high-risk (FHR) for the disorders...
November 2016: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/27898805/characterization-of-three-rice-multiparent-advanced-generation-intercross-magic-populations-for-quantitative-trait-loci-identification
#12
Lijun Meng, Longbiao Guo, Kimberly Ponce, Xiangqian Zhao, Guoyou Ye
Three new rice ( L.) multiparent advanced generation intercross (MAGIC) populations were developed using eight elite rice varieties from different breeding programs. These three populations were two recombinant inbred line (RIL) populations derived from two 4-way crosses, DC1 and DC2, and one RIL population derived from an 8-way cross. These populations were genotyped using an Illumina Infinium rice 6K SNP chip. The potential of the three MAGIC populations in identifying marker-trait associations was demonstrated using the plant height (PH) and heading date (HD) measured in 2014...
July 2016: Plant Genome
https://www.readbyqxmd.com/read/27897363/gating-of-quantum-interference-in-molecular-junctions-by-heteroatom-substitution
#13
Xunshan Liu, Sara Sangtarash, David Reber, Dan Zhang, Hatef Sadeghi, Jia Shi, Zong-Yuan Xiao, Wenjing Hong, Colin J Lambert, Shi-Xia Liu
To guide the choice of future synthetic targets for single-molecule electronics, qualitative design rules are needed, which describe the effect of modifying chemical structure. Here the effect of heteroatom substitution on destructive quantum interference (QI) in single-molecule junctions is, for the first time experimentally addressed by investigating the conductance change when a "parent" meta-phenylene ethylene-type oligomer (m-OPE) is modified to yield a "daughter" by inserting one nitrogen atom into the m-OPE core...
November 29, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27897351/co-existence-of-distinct-supramolecular-assemblies-in-solution-and-in-the-solid-state
#14
Manjunatha Reddy, Aida Huqi, Dinu Iuga, Satoshi Sakurai, Andrew Marsh, Jeffery T Davis, Stefano Masiero, Steven P Brown
The formation of distinct supramolecular assemblies, including a metastable species, is revealed for a lipophilic guanosine (G) derivative in solution and in the solid state. Structurally different G-quartet based assemblies are formed in chloroform depending on the nature of the cation, anion and salt concentration, as characterized by circular dichroism and time course diffusion-ordered NMR spectroscopy data. Intriguingly, even the presence of potassium ions that stabilize G-quartets in chloroform was insufficient to exclusively retain such assemblies in the solid state, leading to the formation of mixed quartet and ribbon-like assemblies as revealed by fast magic-angle spinning (MAS) NMR spectroscopy...
November 29, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27896396/metabolic-profiling-of-ob-ob-mouse-fatty-liver-using-hr-mas-1-h-nmr-combined-with-gene-expression-analysis-reveals-alterations-in-betaine-metabolism-and-the-transsulfuration-pathway
#15
Mikheil Gogiashvili, Karolina Edlund, Kathrin Gianmoena, Rosemarie Marchan, Alexander Brik, Jan T Andersson, Jörg Lambert, Katrin Madjar, Birte Hellwig, Jörg Rahnenführer, Jan G Hengstler, Roland Hergenröder, Cristina Cadenas
Metabolic perturbations resulting from excessive hepatic fat accumulation are poorly understood. Thus, in this study, leptin-deficient ob/ob mice, a mouse model of fatty liver disease, were used to investigate metabolic alterations in more detail. Metabolites were quantified in intact liver tissues of ob/ob (n = 8) and control (n = 8) mice using high-resolution magic angle spinning (HR-MAS) (1)H-NMR. In addition, after demonstrating that HR-MAS (1)H-NMR does not affect RNA integrity, transcriptional changes were measured by quantitative real-time PCR on RNA extracted from the same specimens after HR-MAS (1)H-NMR measurements...
November 28, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27895684/investigation-of-the-gold-nanoparticles-effects-on-the-prostate-dose-distribution-in-brachytherapy-gel-dosimetry-and-monte-carlo-method
#16
Hossein Khosravi, Bijan Hashemi, Faezeh Rahmani, Ahmad Ebadi
PURPOSE: In this work, gold nanoparticles (GNPs) were embedded in the MAGIC-f polymer gel irradiated with the (192)Ir brachytherapy sources. MATERIAL AND METHODS: At the first plexiglas phantom was made as the human pelvis. The GNPs were synthesized with 15 nm in diameter and 0.1 mM (0.0197 mg/ml) in concentration by using a chemical reduction method. Then, the MAGIC-f gel was synthesized. The fabricated gel was poured into the tubes located at the prostate (with and without the GNPs) locations of the phantom...
October 2016: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/27895259/arene-guest-selectivity-and-pore-flexibility-in-a-metal-organic-framework-with-semi-fluorinated-channel-walls
#17
Rebecca Smith, Iñigo J Vitórica-Yrezábal, Adrian Hill, Lee Brammer
A metal-organic framework (MOF) with one-dimensional channels of approximately hexagonal cross-section [Ag2(O2CCF2CF2CO2)(TMP)] 1: (TMP =2,3,5,6-tetramethylpyrazine) has been synthesized with MeOH filling the channels in its as-synthesized form as [Ag2(O2CCF2CF2CO2)(TMP)]·n(MeOH) 1-MEOH: (n = 1.625 by X-ray crystallography). The two types of ligand connect columns of Ag(I) centres in an alternating manner, both around the channels and along their length, leading to an alternating arrangement of hydrocarbon (C-H) and fluorocarbon (C-F) groups lining the channel walls, with the former groups projecting further into the channel than the latter...
January 13, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/27891541/dft-calculations-in-the-assignment-of-solid-state-nmr-and-crystal-structure-elucidation-of-a-lanthanum-iii-complex-with-dithiocarbamate-and-phenanthroline
#18
Vasantha Gowda, Risto S Laitinen, Ville-Veikko Telkki, Anna-Carin Larsson, Oleg N Antzutkin, Perttu Lantto
The molecular, crystal, and electronic structures as well as spectroscopic properties of a mononuclear heteroleptic lanthanum(iii) complex with diethyldithiocarbamate and 1,10-phenanthroline ligands (3 : 1) were studied by solid-state (13)C and (15)N cross-polarisation (CP) magic-angle-spinning (MAS) NMR, X-ray diffraction (XRD), and first principles density functional theory (DFT) calculations. A substantially different powder XRD pattern and (13)C and (15)N CP-MAS NMR spectra indicated that the title compound is not isostructural to the previously reported analogous rare earth complexes with the space group P21/n...
November 28, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27885971/-a-magical-little-pill-that-will-relieve-you-of-your-womanly-issues-what-young-women-say-about-menstrual-suppression
#19
Colleen McMillan, Amanda Jenkins
Perceptions of menstruation by media discourses portray this bodily function to be messy, inconvenient, and as an unnecessary phenomenon to be controlled or possibly eliminated. Commercials shown on YouTube targeted toward young women suggest that having a monthly period is not healthy and a lifestyle that is menses free is both pharmacologically available and recommended in order to live a fuller life. We explored the meanings attached to online menstrual suppression commercials with 10 women aged between 18 and 25...
2016: International Journal of Qualitative Studies on Health and Well-being
https://www.readbyqxmd.com/read/27885766/crystal-structure-determination-of-the-pentagonal-pyramidal-hexamethylbenzene-dication-c6-ch3-6-2
#20
Moritz Malischewski, K Seppelt
In contrast to the well-known 2-norbornyl cation, the structure of which was a matter of long debate until its pentacoordinated nature was recently proven by an X-ray structure, the pentagonal-pyramidal dication of hexamethylbenzene has received considerably less attention. This species was first prepared by Hogeveen in 1973 at low temperatures in magic acid (HSO3 F/SbF5 ), for which he proposed a non-classical structure (containing a hexacoordinated carbon) based on NMR spectroscopy and reactivity studies, but no X-ray crystal structure has been reported...
November 25, 2016: Angewandte Chemie
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