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https://www.readbyqxmd.com/read/28218526/dinuclear-metallacycles-with-single-m-x-m-bridges-x-cl-br-m-fe-ii-co-ii-ni-ii-cu-ii-zn-ii-cd-ii-strong-antiferromagnetic-superexchange-interactions
#1
Daniel L Reger, Andrea E Pascui, Elizabeth A Foley, Mark D Smith, Julia Jezierska, Agnieszka Wojciechowska, Sebastian A Stoian, Andrew Ozarowski
A series of monochloride-bridged, dinuclear metallacycles of the general formula [M2(μ-Cl)(μ-L)2](ClO4)3 have been prepared using the third-generation, ditopic bis(pyrazolyl)methane ligands L = m-bis[bis(1-pyrazolyl)methyl]benzene (Lm), M = Cu(II), Zn(II), and L = m-bis[bis(3,5-dimethyl-1-pyrazolyl)methyl]benzene (Lm*), M = Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II). These complexes were synthesized from the direct reactions of M(ClO4)2·6H2O, MCl2, and the ligand, Lm or Lm*, in the appropriate stoichiometric amounts...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28218237/coherent-control-of-a-strongly-driven-silicon-vacancy-optical-transition-in-diamond
#2
Yu Zhou, Abdullah Rasmita, Ke Li, Qihua Xiong, Igor Aharonovich, Wei-Bo Gao
The ability to prepare, optically read out and coherently control single quantum states is a key requirement for quantum information processing. Optically active solid-state emitters have emerged as promising candidates with their prospects for on-chip integration as quantum nodes and sources of coherent photons connecting these nodes. Under a strongly driving resonant laser field, such quantum emitters can exhibit quantum behaviour such as Autler-Townes splitting and the Mollow triplet spectrum. Here we demonstrate coherent control of a strongly driven optical transition in silicon vacancy centre in diamond...
February 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28214970/optimal-bowel-cleansing-for-colonoscopy-in-the-elderly-patient
#3
Samuel B Ho, Rita Hovsepians, Samir Gupta
Colonoscopy is an important diagnostic and screening tool for colorectal cancer detection and prevention, and adequate bowel preparation is critical for successful colonoscopy. Complications related to colonoscopy, either directly or indirectly related to the procedure, are increased in elderly patients, and the risks and benefits of colonoscopy procedures need to be carefully considered in these patients. Recent studies have shown that 4 L polyethylene glycol with a split preparation is safe and effective for elderly patients, and is the preferred preparation for patients with medical comorbidities...
February 18, 2017: Drugs & Aging
https://www.readbyqxmd.com/read/28210447/the-effect-of-different-insertion-techniques-on-the-depth-of-cure-and-vickers-surface-micro-hardness-of-two-bulk-fill-resin-composite-materials
#4
Lamiaa-Mahmoud Moharam, Ahmed-Zohair El-Hoshy, Karim Abou-Elenein
BACKGROUND: The aim of this study was to evaluate the Vickers surface micro-hardness and the depth of cure of two bulk-fill resin composites and one incremental-fill resin composite. MATERIAL AND METHODS: Two Bulk-fill dental resin composites (X-tra Fil, Voco; Sonic-FillTM 2, Kerr Corporation) and an incremental-fill dental resin composite (Filtek™ Z250 XT, 3M ESPE) were used. Sixty cylindrical specimens of 4 mm thickness were prepared using split Teflon moulds...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28210431/vertical-root-fracture-resistance-of-simulated-immature-permanent-teeth-filled-with-mta-using-different-vehicles
#5
Hacer Aksel, Sevinc Askerbeyli-Örs, Derya Deniz-Sungur
BACKGROUND: The aim of the study is to evaluate the resistance vertical root fracture (VRF) of mineral trioxide aggregate (MTA) filled-immature permanent roots by using three different vehicles. MATERIAL AND METHODS: Forty-extracted human single-rooted mandibular premolars were selected and the root length was standardized to the length of 9 mm. For simulation of immature tooth apices, peeso reamers were introduced into the root canals and the prepared roots were assigned into three experimental groups according the used vehicle (distilled water-DW, prophylene glycol-PG, chlorhexidine-CHX) and control group (n=10)...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28194820/self-assembly-of-hierarchical-ni-mo-polydopamine-microflower-and-its-conversion-to-ni-mo2c-composite-for-water-splitting
#6
Lianshan Sun, Chunli Wang, Qujiang Sun, Yong Cheng, Limin Wang
On the purpose to find efficient non-noble metal catalysts for water splitting, hierarchical Ni-Mo-polydopamine microflowers are synthesized through a facile aqueous phase reaction at room temperature. Herein, NiMoO4 nanowires are utilized as Ni and Mo source, meantime, they can complex with dopamine to form hierarchical structure and affect the scale of the final product. And the energy dispersive spectrometer (EDS) measurement of Ni-Mo2C/C microflowers (MF) show a high content of Mo2C and Ni (>90 wt%)...
February 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28191583/a-hierarchically-porous-nickel-copper-phosphide-nano-foam-for-efficient-electrochemical-splitting-of-water
#7
Li Wei, Kunli Goh, Özgür Birer, H Enis Karahan, Jian Chang, Shengli Zhai, Xuncai Chen, Yuan Chen
Electrochemical splitting of water to produce oxygen (O2) and hydrogen (H2) through a cathodic hydrogen evolution reaction (HER) and an anodic oxygen evolution reaction (OER) is a promising green approach for sustainable energy supply. Here we demonstrated a porous nickel-copper phosphide (NiCuP) nano-foam as a bifunctional electrocatalyst for highly efficient total water splitting. Prepared from a bubble-templated electrodeposition method and subsequent low-temperature phosphidization, NiCuP has a hierarchical pore structure with a large electrochemical active surface area...
February 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28188978/split-dose-bowel-preparation-with-polyethylene-glycol-for-colonoscopy-performed-under-propofol-sedation-is-there-an-optimal-timing
#8
Alaa Alghamry, Sureshkumar K Ponnuswamy, Aditya Agarwal, Hadi Moattar, Stephanie T Yerkovich, Ann E Vandeleur, James Thomas, John Croese, Tony Rahman, Ruth Hodgson
AIM: Aspiration risk, especially with propofol sedation, remains a concern with split-dose bowel preparation using polyethylene glycol, which involves up to one liter of preparation intake close to the procedure time. We aim to identify the ideal timing of bowel preparation that achieves optimal colon cleansing with no increased risk of aspiration in all patients undergoing combined esophagogastroduodenoscopy (EGD) and colonoscopy with propofol sedation. METHODS: We prospectively recruited 892 consecutive patients undergoing simultaneous EGD and colonoscopy...
February 11, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28185091/canal-cleanliness-using-different-irrigation-activation-systems-a-sem-evaluation
#9
K Urban, D Donnermeyer, Edgar Schäfer, S Bürklein
OBJECTIVES: The purpose of this study was to assess the efficacy of different final irrigation activation methods in removing debris and smear layer in the apical, middle, and coronal portion of straight root canals. MATERIAL AND METHODS: Straight root canals of 58 freshly extracted mandibular premolars were used. Root canals were prepared to size 40.06. Irrigation was performed using 3% sodium hypochlorite. Samples were divided into four equal groups (n = 12) according to the irrigation activation techniques: (A) manual irrigation (MI), (B) EndoActivator (EA) (Dentsply Maillefer, Ballaigues, Switzerland), (C) sonic activation EDDY (EDDY; VDW, Munich, Germany), and (D) passive ultrasonic irrigation (PUI)...
February 9, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28181985/artiss-sealant%C3%A2-an-alternative-to-stapling-skin-grafts-on-the-dorsal-side-of-the-hand-and-fingers
#10
David Boccara, Antoine De Runz, Farid Bakara, Marc Chaouat, Maurice Mimoun
The aim of this study was to evaluate the benefit of using a new slow-setting fibrin sealant compared with staples for adherence of split-thickness skin grafts on the backs of hands and fingers. Staple removal is often painful for patients. Twenty-eight patients were included for a graft total of 34 hands. The authors chose to test this sealant on zones that are often difficult to graft given their varied topographies. Its low concentration of thrombin (4 IU/ml) compared with other sealants provides it with prolonged polymerization time (60 seconds) making it easier to use in this location...
February 7, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28179916/postoperative-pain-following-pulpotomy-of-primary-molars-with-two-biomaterials-a-randomized-split-mouth-clinical-trial
#11
Leili Shafie, Hamide Barghi, Masoud Parirokh, Hamed Ebrahimnejad, Nozar Nakhae, Sara Esmaili
INTRODUCTION: The aim of this randomized clinical trial split-mouth study was to compare the postoperative pain following use of mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement as pulpotomy agents in carious primary molars. METHODS AND MATERIALS: Forty-seven children aged between 6-10 years old were enrolled in this study. Each child had two cariously involved primary molar in need of pulpotomy. After caries removal and preparing access cavity in one of the carious teeth, either MTA or CEM cement was randomly used as the pulpotomy agent, while the other cariously involved primary molar tooth was capped with the other material in a separate visit...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28164470/microwave-assisted-synthesis-of-stable-and-highly-active-ir-oxohydroxides-for-electrochemical-oxidation-of-water
#12
Cyriac Massue, Xing Huang, Andrey Tarasov, Chinmoy Ranjan, Sebastien Cap, Robert Schlögl
Water splitting for hydrogen production in acidic media has been limited by the poor stability of the anodic electrocatalyst devoted to the oxygen evolution reaction (OER). To help circumvent this problem we have synthesized a class of novel Ir-oxohydroxides via rapid microwave-supported hydrothermal synthesis, which bridge the gap between electrodeposited amorphous IrOx-films and crystalline IrO2-electrocatalysts prepared via calcination routes. For electrode loadings two orders of magnitude below current standards, the synthesized compounds present an unrivalled combination of high activity and stability under commercially relevant OER-conditions in comparison to reported benchmarks, without any need for pre-treatment...
February 5, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28161872/total-energy-expenditure-energy-intake-and-body-composition-in-endurance-athletes-across-the-training-season-a-systematic-review
#13
REVIEW
Juliane Heydenreich, Bengt Kayser, Yves Schutz, Katarina Melzer
BACKGROUND: Endurance athletes perform periodized training in order to prepare for main competitions and maximize performance. However, the coupling between alterations of total energy expenditure (TEE), energy intake, and body composition during different seasonal training phases is unclear. So far, no systematic review has assessed fluctuations in TEE, energy intake, and/or body composition in endurance athletes across the training season. The purpose of this study was to (1) systematically analyze TEE, energy intake, and body composition in highly trained athletes of various endurance disciplines and of both sexes and (2) analyze fluctuations in these parameters across the training season...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28161171/technical-note-effects-of-attachment-of-hind-teats-before-cleaning-and-attachment-of-front-teats-on-milking-characteristics-in-automatic-milking-systems
#14
J Besier, G Schüpbach-Regula, O Wellnitz, R M Bruckmaier
Milking characteristics differ between the 4 quarters of a dairy cow udder. In particular, milking time is mostly prolonged in hind quarters compared with front quarters because of the usually higher amount of stored milk. The standard milking routine (STDMR) in both conventional and automatic milking systems (AMS) consists of teat preparation of all 4 quarters, followed by attachment of the 4 teat cups, regardless of the distribution of milk between quarters. In the current study, an alternative teat preparation and milking routine (ALTMR) in AMS was tested, which consisted of cleaning and starting the milking of hind teats before cleaning and attachment of front teats...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28160490/a-novel-preservative-free-seasonal-influenza-vaccine-safety-and-immune-response-studying-in-the-frame-of-preclinical-research
#15
Gulbanu Sarsenbayeva, Yevgeniy Volgin, Markhabbat Kassenov, Timur Issagulov, Nikolay Bogdanov, Ainur Nurpeissova, Altynay Sagymbay, Ruslan Abitay, Marina Stukova, Abylay Sansyzbay, Berik Khairullin
The paper describes the results of preclinical testing of the preparation 'Vaccine allantoic split-virus inactivated against seasonal influenza'. Acute toxicity and local irritating effect, anaphylactic reactions to different antigens (vaccine and ovalbumin), delayed-type hypersensitivity to ram erythrocytes, humoral immune response in hemaggtination reaction, immunogenic activity was studied in laboratory animals of various species (mice, rats, guinea pigs). Comparative analysis of the results from testing immunogenic activity of the preparation under study and the commercial influenza vaccines was performed...
February 4, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28155076/non-destructive-determination-of-disintegration-time-and-dissolution-in-immediate-release-tablets-by-terahertz-transmission-measurements
#16
Daniel Markl, Johanna Sauerwein, Daniel J Goodwin, Sander van den Ban, J Axel Zeitler
PURPOSE: The aim of this study was to establish the suitability of terahertz (THz) transmission measurements to accurately measure and predict the critical quality attributes of disintegration time and the amount of active pharmaceutical ingredient (API) dissolved after 15, 20 and 25 min for commercial tablets processed at production scale. METHODS: Samples of 18 batches of biconvex tablets from a production-scale design of experiments study into exploring the design space of a commercial tablet manufacturing process were used...
February 2, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28154961/the-impact-of-firms-adjustments-on-the-indirect-cost-of-illness
#17
Michał Jakubczyk, Beata Koń
Illness-related absenteeism reduces firms' output, an effect referred to as indirect cost (IC) and often included in cost-of-illness or cost-effectiveness (of health technologies) studies. The companies may foresee this effect and modify hiring or contracting policies. We present a model allowing the estimation of IC with such adjustments. We show that the risk of illness does not change the general shape and properties of the (expected) marginal productivity function. We apply our model to several illustrative examples and show that firm's adjustments impact IC in an ambiguous way, depending on detailed company/market characteristics: in some cases the company reduces the employment (further increasing IC), in another-the opposite happens...
February 2, 2017: Int J Health Econ Manag
https://www.readbyqxmd.com/read/28154618/epr-and-structural-characterization-of-water-soluble-mn-2-doped-si-nanoparticles
#18
Tonya M Atkins, Jeffrey H Walton, Mani P Singh, Shreyashi Ganguly, Oliver Janka, Angelique Y Louie, Susan M Kauzlarich
Water-soluble poly(allylamine) Mn(2+)-doped Si (SiMn) nanoparticles (NPs) were prepared and show promise for biologically related applications. The nanoparticles show both strong photoluminescence and good magnetic resonance contrast imaging. The morphology and average diameter were obtained through transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM); spherical crystalline Si NPs with an average diameter of 4.2 ± 0.7 nm were observed. The doping maximum obtained through this process was an average concentration of 0...
January 26, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28149235/effet-paradoxal-du-type-d%C3%A2-excision-sur-la-prise-et-le-d%C3%A3-lai-de-cicatrisation-des-greffes-expans%C3%A3-es-pour-le-traitement-des-br%C3%A3-lures-aigu%C3%A3-s-a-propos-de-1129-cas
#19
M Guibert, M Chaouat, D Boccara, O Marco, R Lavocat, O Alameri, E Deslandes, C Montlahuc, M Mimoun
Split-thickness meshed skin graft is frequently used in the treatment of acute burns. We studied the effect of the type of basement preparation on graft intake and healing time. We retrospectively analysed 1,129 meshed grafts used in the treatment of acute burns between 1995 and 2005. Intake was significantly better after avulsion (82%) than after tangential excision (75%). Intake was better if avulsion was performed before day 7 (83% vs. 73%). A trend for better intake after tangential excision was seen when performed between day 7 and 21...
June 30, 2016: Annals of Burns and Fire Disasters
https://www.readbyqxmd.com/read/28134067/ultrastructural-features-of-the-tomont-of-cryptocaryon-irritans-ciliophora-prostomatea-a-parasitic-ciliate-of-marine-fishes
#20
Rui Ma, Xinpeng Fan, Fei Yin, Bing Ni, Fukang Gu
Numerous studies have been conducted on the cellular morphology of Cryptocaryon irritans. However, details regarding the tomont stage of its life cycle remain lacking. In this study, we investigated the morphology of the tomont stage throughout encystment and cell division using light and electron microscopy. Results showed that there was no secretion of encystation-specific secretory vesicles or extrusomes during formation of the cyst wall. Instead, the synthesis and construction of the C. irritans cyst wall materials may involve molecular events at the pellicle...
January 30, 2017: Parasitology
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