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https://www.readbyqxmd.com/read/28221762/direct-observation-of-2d-electrostatics-and-ohmic-contacts-in-template-grown-graphene-ws2-heterostructures
#1
Changxi Zheng, Qianhui Zhang, Bent Weber, Hesameddin Ilatikhameneh, Fan Chen, Harshad Sahasrabudhe, Rajib Rahman, Shiqiang Li, Zhen Chen, Jack Hellerstedt, Yupeng Zhang, Wen Hui Duan, Qiaoliang Bao, Michael S Fuhrer
Large-area two-dimensional (2D) heterojunctions are promising building blocks of 2D circuits. Understanding their intriguing electrostatics is pivotal but largely hindered by the lack of direct observations. Here graphene-WS2 heterojunctions are prepared over large areas using a seedless ambient-pressure chemical vapor deposition technique. Kelvin probe force microscopy, photoluminescence spectroscopy and scanning tunneling microscopy characterize the doping in graphene-WS2 heterojunctions as-grown on sapphire and transferred to SiO2 with and without thermal annealing...
February 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28221042/on-the-internal-dynamics-of-the-3-pyrroline-n-oxide-ring-in-spin-labeled-proteins
#2
Philipp Consentius, Bernhard Loll, Ulrich Gohlke, Claudia Alings, Carsten Mueller, Robert Müller, Christian Teutloff, Udo Heinemann, Martin Kaupp, Markus C Wahl, Thomas Risse
Site-directed spin labeling is a versatile tool to study structure as well as dynamics of proteins using EPR spectroscopy. Methanethiosulfonate (MTS)-spin labels tethered through a disulfide linkage to an engineered cysteine residue were used in a large number of studies to extract structural as well as dynamic information of the protein from the rotational dynamics of the nitroxide moiety. The ring itself was always considered to be a rigid body. In this contribution, we present a combination of high-resolution X-ray crystallography and EPR spectroscopy of spin-labeled protein single crystals demonstrating that the nitroxide ring inverts fast at ambient temperature, while being characterized by a bent conformation at low temperature...
February 21, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28220111/identity-abundance-and-reactivation-kinetics-of-thermophilic-fermentative-endospores-in-cold-marine-sediment-and-seawater
#3
Marta Volpi, Bente Aa Lomstein, Andreas Sichert, Hans Røy, Bo B Jørgensen, Kasper U Kjeldsen
Cold marine sediments harbor endospores of fermentative and sulfate-reducing, thermophilic bacteria. These dormant populations of endospores are believed to accumulate in the seabed via passive dispersal by ocean currents followed by sedimentation from the water column. However, the magnitude of this process is poorly understood because the endospores present in seawater were so far not identified, and only the abundance of thermophilic sulfate-reducing endospores in the seabed has been quantified. We investigated the distribution of thermophilic fermentative endospores (TFEs) in water column and sediment of Aarhus Bay, Denmark, to test the role of suspended dispersal and determine the rate of endospore deposition and the endospore abundance in the sediment...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28219961/protocol-for-the-development-of-a-core-domain-set-for-hidradenitis-suppurativa-trial-outcomes
#4
Linnea Thorlacius, John R Ingram, Amit Garg, Bente Villumsen, Solveig Esmann, Joslyn S Kirby, Alice B Gottlieb, Joseph F Merola, Robert Dellavalle, Robin Christensen, Gregor B E Jemec
INTRODUCTION: Randomised controlled trials (RCTs) should have well-defined primary and secondary outcomes to answer questions generated by the main hypotheses. However, for the chronic, inflammatory skin disease hidradenitis suppurativa (HS), the reported outcome measures are numerous and diverse. A recent systematic review found a total of 30 outcome measure instruments in 12 RCTs. This use of a broad range of outcome measures can increase difficulties in interpretation and comparison of results and may potentially obstruct appropriate evidence synthesis by causing reporting bias...
February 20, 2017: BMJ Open
https://www.readbyqxmd.com/read/28218541/electronic-structures-of-reduced-and-superreduced-ir2-1-8-diisocyanomenthane-4-n-complexes
#5
Stanislav Záliš, Bryan M Hunter, Harry B Gray, Antonín Vlček
Molecular and electronic structures of Ir2(1,8-diisocyanomenthane)4(n+) (Ir(dimen)(n+)) complexes have been investigated by DFT for n = 2, 1, 0 (abbreviated 2+, 1+, 0). Calculations reproduced the experimental structure of 2+, ν(C≡N) IR, and visible absorption spectra of all three oxidation states, as well as the EPR spectrum of 1+. We have shown that the two reduction steps correspond to successive filling of the Ir-Ir pσ orbital. Complexes 2+ and 1+ have very similar structures with 1+ having a shorter Ir-Ir distance...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28217359/crystal-structures-of-two-mononuclear-complexes-of-terbium-iii-nitrate-with-the-tripodal-alcohol-1-1-1-tris-hy-droxy-meth-yl-propane
#6
Thaiane Gregório, Siddhartha O K Giese, Giovana G Nunes, Jaísa F Soares, David L Hughes
Two new mononuclear cationic complexes in which the Tb(III) ion is bis-chelated by the tripodal alcohol 1,1,1-tris-(hy-droxy-meth-yl)propane (H3L(Et), C6H14O3) were prepared from Tb(NO3)3·5H2O and had their crystal and mol-ecular structures solved by single-crystal X-ray diffraction analysis after data collection at 100 K. Both products were isolated in reasonable yields from the same reaction mixture by using different crystallization conditions. The higher-symmetry complex dinitratobis[1,1,1-tris-(hy-droxy-meth-yl)propane]-terbium(III) nitrate di-meth-oxy-ethane hemisolvate, [Tb(NO3)2(H3L(Et))2]NO3·0...
February 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28215797/in-situ-evaluation-of-water-and-energy-consumptions-at-the-end-use-level-the-influence-of-flow-reducers-and-temperature-in-baths
#7
C Matos, A Briga-Sá, I Bentes, D Faria, S Pereira
Nowadays, water and energy consumption is intensifying every year in most of the countries. This perpetual increase will not be supportable in the long run, making urgently to manage these resources on a sustainable way. Domestic consumptions of water and electric energy usually are related and it's important to study that relation, identifying opportunities for use efficient improvement. In fact, without an understanding of water-energy relations, there are water efficiency measures that may lead to unintentional costs in the energy efficiency field...
February 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214038/maximising-synergy-among-tropical-plant-systematists-ecologists-and-evolutionary-biologists
#8
REVIEW
Timothy R Baker, R Toby Pennington, Kyle G Dexter, Paul V A Fine, Helen Fortune-Hopkins, Euridice N Honorio, Isau Huamantupa-Chuquimaco, Bente B Klitgård, Gwilym P Lewis, Haroldo C de Lima, Peter Ashton, Christopher Baraloto, Stuart Davies, Michael J Donoghue, Maria Kaye, W John Kress, Caroline E R Lehmann, Abel Monteagudo, Oliver L Phillips, Rodolfo Vasquez
Closer collaboration among ecologists, systematists, and evolutionary biologists working in tropical forests, centred on studies within long-term permanent plots, would be highly beneficial for their respective fields. With a key unifying theme of the importance of vouchered collection and precise identification of species, especially rare ones, we identify four priority areas where improving links between these communities could achieve significant progress in biodiversity and conservation science: (i) increasing the pace of species discovery; (ii) documenting species turnover across space and time; (iii) improving models of ecosystem change; and (iv) understanding the evolutionary assembly of communities and biomes...
February 14, 2017: Trends in Ecology & Evolution
https://www.readbyqxmd.com/read/28206812/is-diabetes-associated-with-lower-vitamin-c-status-in-pregnant-women-a-prospective-study
#9
Bente Juhl, Finn Friis Lauszus, Jens Lykkesfeldt
Few studies have examined how vitamin C status is affected in diabetic pregnancy and no comparison between normal and diabetic pregnancies has been found. This study evaluated vitamin C status prospectively during pregnancy in women with type 1 diabetes mellitus (n=76), in non-diabetic women (n=60), and in their respective neonates. Vitamin C was lower in diabetic women throughout all trimesters compared to controls (p<0.01). Repeated measurements analysis showed significant differences between diabetic and non-diabetic women; also when adjusted for birth weight ratio and age...
February 16, 2017: International Journal for Vitamin and Nutrition Research. Journal International de Vitaminologie et de Nutrition
https://www.readbyqxmd.com/read/28205253/supporting-existential-care-with-protected-mealtimes-patients-experiences-of-a-mealtime-intervention-in-a-neurological-ward
#10
Malene Beck, Regner Birkelund, Ingrid Poulsen, Bente Martinsen
AIM: To explore the experiences of patients who were admitted to the neurological ward during an intervention - inspired by Protected Mealtime - that changed the traditional mealtime practice. BACKGROUND: Mealtimes are busy events in hospitals and patients are often interrupted by high-priority tasks (e.g., taking blood samples) while eating. Protected Mealtimes is a British concept that changes the organizational structure of mealtimes and provides a focus on the mealtime by ceasing all non-acute activities while patients are eating...
February 15, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28205037/the-mesenteric-defects-in-laparoscopic-roux-en-y-gastric-bypass-5-years-follow-up-of-non-closure-versus-closure-using-the-stapler-technique
#11
Ebrahim Aghajani, Bent J Nergaard, Bjorn G Leifson, Jan Hedenbro, Hjortur Gislason
BACKGROUND: Internal hernia (IH) is a common complication of laparoscopic Roux-en-Y gastric bypass (LRYGB). Little large-volume data exist on how to handle the mesenteric defects during LRYGB. This study evaluated long-term follow-up (5.5 years) of 2443 patients with primary closure of the mesenteric defects with a stapling device at LRYGB, in comparison with a non-closed group from the same centre. METHODS: All patients (N = 4013) undergoing LRYGB over a 10-year period (2005-2015) at a single institution were evaluated...
February 15, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28204639/comparison-of-2d-rano-and-volumetric-methods-for-assessment-of-recurrent-glioblastoma-treated-with-bevacizumab-a-report-from-the-belob-trial
#12
Renske Gahrmann, Martin van den Bent, Bronno van der Holt, René Michel Vernhout, Walter Taal, Maaike Vos, Jan Cees de Groot, Laurens Victor Beerepoot, Jan Buter, Zwenneke Hendrieke Flach, Monique Hanse, Bas Jasperse, Marion Smits
No abstract text is available yet for this article.
February 13, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28204515/fetal-hyperglycemia-changes-human-preadipocyte-function-in-adult-life
#13
Ninna Schiøler Hansen, Klaudia Stanislawa Strasko, Line Hjort, Louise Kelstrup, Azadeh Houshmand-Øregaard, Maren Schrölkamp, Heidi Schiøler Schultz, Camilla Scheele, Bente Klarlund Pedersen, Charlotte Ling, Tine Dalsgaard Clausen, Peter Damm, Allan Vaag, Christa Broholm
No abstract text is available yet for this article.
February 13, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28203027/-a-new-method-to-orthodontically-correct-dental-occlusal-plane-canting-wave-shaped-arch
#14
X Zheng, X X Hu, N Ma, X H Chen
OBJECTIVE: To introduce a technique of second order wave-shaped arch wire to orthodontically treat dental occlusal plane canting (DOPC) with left-right interactive anchorage, and to test its clinical efficacy. METHODS: Among the permanent dentition malocclusion patients who showed no obvious facial asymmetry, we screened for patients who showed anterior occlusal plane canting (AOPC) after routine orthodontic examination, treatment planning, MBT fixed appliance installation and serial arch wires alignment...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28199786/alpha-adrenergic-receptor-blockade-increases-capillarisation-and-fractional-o2-extraction-and-lowers-blood-flow-in-contracting-human-skeletal-muscle
#15
Stefan P Mortensen, Stuart Egginton, Mads Madsen, Jonas B Hansen, Gregers D W Munch, Ulrik Winning Iepsen, Thorbjörn Åkerström, Bente K Pedersen, Ylva Hellsten
AIM: To investigate the effect of elevated basal shear stress on angiogenesis in humans, and the role of enhanced skeletal muscle capillarisation on blood flow and O2 extraction. METHODS: Limb haemodynamics and O2 extraction was measured at rest and during one-leg knee-extensor exercise (12 and 24W) in 10 healthy untrained young men before and after 4 weeks treatment with an α1 receptor-antagonist (Terazosin, 1-2 mg day(-1) ). Corresponding biopsies were taken from the m...
February 15, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28198859/ultra-compact-and-highly-efficient-polarization-rotator-utilizing-multi-mode-waveguides
#16
Hongnan Xu, Yaocheng Shi
An ultra-compact and highly efficient polarization rotator is proposed and experimentally realized on the silicon-on-insulator (SOI) platform. The polarization rotation (TM<sub>0</sub>-TE<sub>1</sub>) process is obtained by utilizing a straight multi-mode waveguide, while the mode conversion (TE<sub>1</sub>-TE<sub>0</sub>) process is realized by a bent multi-mode waveguide. For the proposed structure, only one etching step is required for the fabrication. The measured extinction ratio and insertion loss at the central wavelength are 19...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28197564/core-to-core-dimers-forming-switchable-mesophase
#17
M Horčic, J Svoboda, V Novotná, D Pociecha, E Gorecka
We report structurally new type of dimers composed of bent-core molecules connected through their central cores by an alkylene spacer. Various self-assembling structures are discovered when prolonging the terminal alkyl chains in arms. Among diverse mesophases, the antiferroelectric type of switching under an applied electric field is observed.
February 15, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28195393/use-of-multigene-panel-identifies-pathogenic-variants-in-several-crc-predisposing-genes-in-patients-previously-tested-for-lynch-syndrome
#18
Maren F Hansen, Jostein Johansen, Anna E Sylvander, Inga Bjørnevoll, Bente A Talseth-Palmer, Liss Anne S Lavik, Alexandre Xavier, Lars F Engebretsen, Rodney J Scott, Finn Drabløs, Wenche Sjursen
Many families with a high burden of colorectal cancer fulfil the clinical criteria for Lynch Syndrome. However, in about half of these families, no germline mutation in the mismatch repair genes known to be associated with this disease can be identified. The aim of this study was to find the genetic cause for the increased colorectal cancer risk in these unsolved cases. Therefore, we designed a gene panel targeting 112 previously known or candidate colorectal cancer susceptibility genes to screen 274 patient samples for mutations...
February 14, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28195374/development-of-polar-order-by-liquid-crystal-self-assembly-of-weakly-bent-molecules
#19
Mohamed Alaasar, Marko Prehm, Silvio Poppe, Carsten Tschierske
Organic ferroelectrics are of growing importance for multifunctional materials. Here we provide an understanding of the distinct stages of the development of sterically induced polar order in liquid crystalline (LC) soft matter. Three series of weakly bent molecules derived from 4-cyanoresorcinol as the bent core unit with laterally fluorinated azobenzene wings have been synthesized and the effects of the position of fluorine substitution, alkyl chain length and temperature on the LC self-assembly and polar order were studied...
February 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28195368/photoswitching-of-dihydroazulene-derivatives-in-liquid-crystalline-host-systems
#20
Anne Ugleholdt Petersen, Martyn Jevric, Richard J Mandle, Mark T Sims, John N Moore, Stephen J Cowling, John W Goodby, Mogens Broendsted Nielsen
Photoswitches and dyes in the liquid crystalline nematic phase have the potential for use within a wide range of applications. A high order parameter is desirable in order to maximize the change in properties induced by an external stimulus. A set of photochromic and non-photochromic dyes were investigated for these applications. It was found that a bent-shaped 7-substituted dihydroazulene (DHA) photoswitch exhibited liquid crystalline properties. Further investigation demonstrated that this material actually underwent two distinctive reaction pathways upon heating to a deactivated form via a 1,5-sigmatropic shift and to a linear 6-substituted DHA...
February 14, 2017: Chemistry: a European Journal
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