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https://www.readbyqxmd.com/read/29775372/polar-kerr-effect-from-time-reversal-symmetry-breaking-in-the-heavy-fermion-superconductor-pros_-4-sb_-12
#1
E M Levenson-Falk, E R Schemm, Y Aoki, M B Maple, A Kapitulnik
We present polar Kerr effect measurements of the filled skutterudite superconductor PrOs_{4}Sb_{12}. Simultaneous ac susceptibility measurements allow us to observe the superconducting transition under the influence of heating from the optical beam. A nonzero Kerr angle θ_{K} develops below the superconducting transition, saturating at ∼300  nrad at low temperatures. This result is repeated across several measurements of multiple samples. By extrapolating the measured θ_{K}(T) to zero optical power, we are able to show that the Kerr angle onset temperature in one set of measurements is consistent with the transition to the B phase at T_{C2}...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29774916/the-synergistic-effect-of-non-stoichiometry-and-sb-doping-on-air-stable-%C3%AE-cspbi-3-for-efficient-carbon-based-perovskite-solar-cells
#2
Sisi Xiang, Weiping Li, Ya Wei, Jiaming Liu, Huicong Liu, Liqun Zhu, Haining Chen
α-CsPbI3 with the most suitable band gap for all-inorganic perovskite solar cell (PSC) application faces an issue of phase instability at low temperature in an air atmosphere. Herein, through stoichiometric investigation, α-CsPbI3 is successfully obtained with excess CsI at 110 °C in an air atmosphere. By doping α-CsPbI3 with Sb, phase stability is further enhanced and the film morphology is also improved. Carbon-based perovskite solar cells (C-PSCs) based on CsPb0.96Sb0.04I3 achieve a promising power conversion efficiency (PCE) of 5...
May 18, 2018: Nanoscale
https://www.readbyqxmd.com/read/29771966/the-effect-of-chronic-progressive-dose-sodium-bicarbonate-ingestion-on-crossfit-like-performance-a-double-blind-randomized-cross-over-trial
#3
Krzysztof Durkalec-Michalski, Emilia E Zawieja, Tomasz Podgórski, Igor Łoniewski, Bogna E Zawieja, Marta Warzybok, Jan Jeszka
BACKGROUND: Sodium bicarbonate (SB) has been proposed as an ergogenic aid, as it improves high-intensity and resistance exercise performance. However, no studies have yet investigated SB application in CrossFit. This study examined the effects of chronic, progressive-dose SB ingestion on CrossFit-like performance and aerobic capacity. METHODS: In a randomized, double-blind, cross-over trial, 21 CrossFit-trained participants were randomly allocated to 2 groups and underwent 2 trials separated by a 14-day washout period...
2018: PloS One
https://www.readbyqxmd.com/read/29770777/shubnikov-de-haas-oscillations-in-i-p-i-and-i-n-i-type-topological-insulator-bi-sub-x-sub-sb-sub-1-x-sub-sub-2-sub-te-sub-3-sub
#4
Ryota Akiyama, Kazuki Sumida, Satoru Ichinokura, Ryosuke Nakanishi, Akio Kimura, Konstantin A Kokh, Oleg Tereshchenko, Shuji Hasegawa
We show Shubnikov-de Haas (SdH) oscillations in topological insulator (Bi<sub>x</sub>Sb<sub>1-x</sub>)<sub>2</sub>Te<sub>3</sub> flakes whose carrier types are <i>p</i>-type (<i>x</i> = 0.29, 0.34) and <i>n</i>-type (<i>x</i> = 0.42). The physical properties such as the Berry phase, carrier mobility, and scattering time significantly changed by tuning the Fermi-level position with the concentration <i>x</i>...
May 17, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29767333/laparoscopic-adhesiolysis-not-for-all-patients-not-for-all-surgeons-not-in-all-centres
#5
Salomone Di Saverio, Arianna Birindelli, Richard Ten Broek, Justin R Davies, Matteo Mandrioli, Ville Sallinen
ASBO is a common cause of emergency surgery and the use of laparoscopy for the treatment of these patients is still under debate and conflicting results have been published, in particular regarding the high risk of iatrogenic bowel injury. In fact, although over the last few years there has been an increasing enthusiasm in the surgical community about the advantages and potential better outcomes of laparoscopic management of adhesive small bowel obstruction (ASBO), recently published studies have introduced a significant word of caution...
May 16, 2018: Updates in Surgery
https://www.readbyqxmd.com/read/29767224/innovative-technique-for-endoscopic-placement-of-sengstaken-blakemore-tube
#6
Arleen M Ortiz, Cesar J Garcia, Mohamed O Othman, Marc J Zuckerman
OBJECTIVES: The Sengstaken-Blakemore (SB) tube is used in cases of uncontrolled variceal bleeding. Because of the complexity of the procedure and the lack of visualization, various techniques have been described to avoid blind placement. We report an innovative and simple technique for placement of the SB tube under direct endoscopic visualization. METHODS: A grasp-and-place technique for endoscopic placement of SB tubes is described and a retrospective cohort study chart review of endoscopies done for variceal bleeding in our medical center is reported...
May 2018: Southern Medical Journal
https://www.readbyqxmd.com/read/29766418/partitioning-of-particulate-matter-and-elements-of-suburban-continental-aerosols-between-fine-and-coarse-modes
#7
Jelena Đuričić-Milanković, Ivan Anđelković, Ana Pantelić, Srđan Petrović, Andrea Gambaro, Dušan Antonović, Dragana Đorđević
The results presented in this work demonstrate for the first time a distribution of elements in the spectral analysis of aerosols in the suburban continental Balkan Peninsula. Samples were collected in the suburban area of Belgrade (Serbia) in the period from March 2012 till December 2013. Results presented here are from long-term measurements of masses of size-segregated aerosols and macro- and microelements in the range of PM0.27-16 . The following elements were analyzed: Al, Ag, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Ti, Tl, V, and Zn; levels of Be, Hg, and Se were under the detection limits in all samples...
May 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29765701/subjects-with-cardiovascular-disease-or-high-disease-risk-are-more-sedentary-and-less-active-than-their-healthy-peers
#8
Ville Vasankari, Pauliina Husu, Henri Vähä-Ypyä, Jaana Helena Suni, Kari Tokola, Katja Borodulin, Heini Wennman, Jari Halonen, Juha Hartikainen, Harri Sievänen, Tommi Vasankari
Objectives: We investigated differences in objectively measured sedentary behaviour (SB) and physical activity (PA) levels in subjects with cardiovascular disease (CVD) diagnosis or high CVD risk compared with healthy controls. Methods: The present study includes a subsample (n=1398, Health 2011 Study) of participants, who attended health examinations and wore a triaxial accelerometer (≥4 days). Patients with CVD were identified and CVD risk was calculated for others using Framingham Risk Score (FRS)...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29761644/impact-of-stoichiometry-on-the-structure-of-van-der-waals-layered-gete-sb-2-te-3-superlattices-used-in-interfacial-phase-change-memory-ipcm-devices
#9
Philippe Kowalczyk, Françoise Hippert, Nicolas Bernier, Cristian Mocuta, Chiara Sabbione, Walter Batista-Pessoa, Pierre Noé
Van der Waals layered GeTe/Sb2 Te3 superlattices (SLs) have demonstrated outstanding performances for use in resistive memories in so-called interfacial phase-change memory (iPCM) devices. GeTe/Sb2 Te3 SLs are made by periodically stacking ultrathin GeTe and Sb2 Te3 crystalline layers. The mechanism of the resistance change in iPCM devices is still highly debated. Recent experimental studies on SLs grown by molecular beam epitaxy or pulsed laser deposition indicate that the local structure does not correspond to any of the previously proposed structural models...
May 14, 2018: Small
https://www.readbyqxmd.com/read/29761569/cognitive-and-functional-progression-in-alzheimer-disease-a-prediction-model-of-latent-classes
#10
Miriam L Haaksma, Amaia Calderón-Larrañaga, Marcel G M Olde Rikkert, René J F Melis, Jeannie-Marie S Leoutsakos
OBJECTIVE: We sought to replicate a previously published prediction model for progression, developed in the Cache County Dementia Progression Study, using a clinical cohort from the National Alzheimer's Coordinating Center. METHODS: We included 1120 incident Alzheimer disease (AD) cases with at least one assessment after diagnosis, originating from 31 AD centres from the United States. Trajectories of the Mini-Mental State Examination (MMSE) and Clinical Dementia Rating sum of boxes (CDR-sb) were modelled jointly over time using parallel-process growth mixture models in order to identify latent classes of trajectories...
May 15, 2018: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/29760643/combining-polygenic-hazard-score-with-volumetric-mri-and-cognitive-measures-improves-prediction-of-progression-from-mild-cognitive-impairment-to-alzheimer-s-disease
#11
Karolina Kauppi, Chun Chieh Fan, Linda K McEvoy, Dominic Holland, Chin Hong Tan, Chi-Hua Chen, Ole A Andreassen, Rahul S Desikan, Anders M Dale
Improved prediction of progression to Alzheimer's Disease (AD) among older individuals with mild cognitive impairment (MCI) is of high clinical and societal importance. We recently developed a polygenic hazard score (PHS) that predicted age of AD onset above and beyond APOE . Here, we used data from the Alzheimer's Disease Neuroimaging Initiative (ADNI) to further explore the potential clinical utility of PHS for predicting AD development in older adults with MCI. We examined the predictive value of PHS alone and in combination with baseline structural magnetic resonance imaging (MRI) data on performance on the Mini-Mental State Exam (MMSE)...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29759719/atrial-ganglionated-plexus-modification-a-novel-approach-to-treat-symptomatic-sinus-bradycardia
#12
Mu Qin, Yu Zhang, Xu Liu, Wei-Feng Jiang, Shao-Hui Wu, Sunny Po
OBJECTIVES: This study sought to determine if anatomic atrial ganglionated plexus (GP) ablation leads to long-term sinus rate (SR) increase and improves quality of life in patients with symptomatic sinus bradycardia (SB). BACKGROUND: Atrial GP ablation has been demonstrated to increase SR in our previous study. Atrial GP ablation may also be effective in treating patients with symptomatic SB. METHODS: Sixty-two patients with symptomatic SB were recruited: Group A included patients <50 years of age (n = 40); Group B included patients ≥50 years of age (n = 22)...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29757339/novel-antimony-iii-hydroxamic-acid-complexes-as-potential-anti-leishmanial-agents
#13
D M Keogan, S S C Oliveira, L S Sangenito, M H Branquinha, R D Jagoo, B Twamley, A L S Santos, D M Griffith
Reaction of benzohydroxamic acid (Bha), 2-pyridinehydroxamic acid (2-pyha), 2-amino-phenylhydroxamic acid (2-NH2-pha) and salicylhydroxamic acid (Sha) with SbCl3 in ethanol gave the corresponding novel hydroxamato Sb(iii) complexes, [Sb(Bha-1H)2Cl] 1, [SbCl2(2-pyha-1H)] 2, [Sb(2-NH2-pha-1H)(2-NH3-pha-1H)]Cl2 3 and [SbCl(Sha-1H)2] 4. In all cases the hydroxamic acids coordinate to the Sb centres in the typical bidentate hydroxamato (O,O') coordination mode, via the carbonyl oxygen and deprotonated hydroxyl group...
May 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29757239/preparation-physicochemical-and-antioxidant-properties-of-acid-and-pepsin-soluble-collagens-from-the-swim-bladders-of-miiuy-croaker-miichthys-miiuy
#14
Wen-Hao Zhao, Chang-Feng Chi, Yu-Qin Zhao, Bin Wang
Collagen is one of the most useful biomaterials and widely applied in functional food and cosmetics. However, some consumers have paid close attention to the safety of mammalian collagens because of the outbreaks of bovine spongiform encephalopathy (BSE), foot-and-mouth disease (FMD), and other prion diseases. Therefore, there is a strong demand for developing alternative sources of collagen, with one promising source being from the process by-products of commercial fisheries. In this report, acid-soluble collagen (ASC-SB) and pepsin-soluble collagen (PSC-SB) from swim bladders of miiuy croaker ( Miichthys miiuy ) were isolated with yields of 1...
May 12, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29756562/perspectives-and-new-aspects-of-metalloproteinases-inhibitors-in-therapy-of-cns-disorders-from-chemistry-to-medicine
#15
Anna Boguszewska-Czubara, Barbara Budzynska, Krystyna Skalicka-Wozniak, Jacek Kurzepa
Matrix metalloproteinases (MMPs) play a key role in remodelling of the extracellular matrix (ECM) and, at the same time, influence cell differentiation, migration, proliferation and survival. Their importance in variety of human diseases including cancer, rheumatoid arthritis, pulmonary emphysema and fibrotic disorders has been known for many years but special attention should be paid on the role of MMPs in the central nervous system (CNS) disorders. Till now, there are not many well documented physiological MMP target proteins in the brain and only some pathological ones...
May 13, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29756082/altered-cortical-gaba-in-female-veterans-with-suicidal-behavior-sex-differences-and-clinical-correlates
#16
Andrew Prescot, Chandni Sheth, Margaret Legarreta, Perry F Renshaw, Erin McGlade, Deborah Yurgelun-Todd
Background: Suicide is a public health concern in the civilian and veteran populations. Stressful life events are precipitating factors for suicide. The neurochemical underpinnings of the association between stress/trauma and suicide risk are unclear, especially in regards to sex differences. We hypothesized that gamma-amino butyric acid (GABA), the major inhibitory neurotransmitter may be a neurochemical candidate that is critical in the association between stress and suicide risk in veterans...
April 6, 2018: Chronic Stress
https://www.readbyqxmd.com/read/29755509/synthesis-structural-characterization-and-antibacterial-activity-of-novel-erbium-iii-complex-containing-antimony
#17
Ting Liu, Rong-Gui Yang, Guo-Qing Zhong
The novel 3D edta-linked heterometallic complex [Sb2 Er(edta)2 (H2 O)4 ]NO3 ·4H2 O (H4 edta = ethylenediaminetetraacetic acid) was synthesized and characterized by elemental analyses, single-crystal X-ray diffraction, powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermal analysis. The complex crystallizes in the monoclinic system with space group Pm . In the complex, each erbium(III) ion is connected with antimony(III) ions bridging by four carboxylic oxygen atoms, and in each [Sb(edta)]- anion, the antimony(III) ion is hexacoordinated by two nitrogen atoms and four oxygen atoms from the edta4- ions, together with a lone electron pair at the equatorial position...
2018: Bioinorganic Chemistry and Applications
https://www.readbyqxmd.com/read/29753682/class-a-%C3%AE-lactamases-and-inhibitors-in-silico-analysis-of-the-binding-mode-and-the-relationship-with-resistance
#18
Rebeca Pereira, Vitor Won-Held Rabelo, Alexander Sibajev, Paula Alvarez Abreu, Helena Carla Castro
β-lactams are one of the most common antimicrobials used to treat bacterial infections. However, bacterial resistance has compromised their efficacy, mainly due to β-lactamase enzyme production. To overcome this resistance, β-lactamase inhibitors can be used in association with these antimicrobials. Herein, we analyzed the structural characteristics of β-lactamases and their interactions with classical inhibitors, such as clavulanic acid (CA), sulbactam (SB) and tazobactam (TZ) to gain insights into resistance...
May 10, 2018: Journal of Biotechnology
https://www.readbyqxmd.com/read/29753432/-links-between-self-harm-and-suicidal-behaviour-in-adolescents
#19
Salomé Grandclerc, Jonathan Lachal
Nonsuicidal self-injury (NSSI) and suicidal behaviour (SB) are both important issues in adolescent health care. The fact that they frequently coexist means that it is important to consider the nature of the link between them and the ways they are understood. Suicide and self-injury share the same risk factors. Integrated models envisage NSSI as a gateway enabling teenagers to acquire a capability for suicide. The act short-circuits the thought process and the intention to die underlying the act appears difficult to assess...
May 2018: Soins. Psychiatrie
https://www.readbyqxmd.com/read/29753138/multifunctional-nir-responsive-pvp-cu-sb-s-nanotheranostic-agent-for-photoacoustic-imaging-and-photothermal-photodynamic-therapy
#20
Meirong Hou, Chenggong Yan, Zelong Chen, Qingliang Zhao, Miaomiao Yuan, Yikai Xu, Bingxia Zhao
Ternary copper-based chalcogenide nanomaterials have become rather attractive due to the near-infrared (NIR) response in cancer theranostic fields. However, it is still challenging to further improve the theranostic efficiency of these nanomaterials. Herein, Cu-Sb-S nanoparticles (NPs) around 24 nm are synthesized facilely and functionalized with poly(vinylpyrrolidone) (PVP). Under the NIR irradiation, the resultant PVP-Cu-Sb-S NPs exhibit a relatively high photothermal conversion efficiency of 53.16% and a simultaneous reactive oxygen species (ROS) generation effect...
May 9, 2018: Acta Biomaterialia
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