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https://www.readbyqxmd.com/read/29334457/new-mechanism-for-ferroelectricity-in-the-perovskite-ca2-xmnxti2o6-synthesized-by-spark-plasma-sintering
#1
Zongyao Li, Yujin Cho, Xiang Li, Xinyu Li, Akihisa Aimi, Yoshiyuki Inaguma, Jose Antonio Alonso, Maria Teresa Fernandez-Diaz, Jiaqiang Yan, Michael C Downer, Graeme Henkelman, John B Goodenough, Jianshi Zhou
Perovskite oxides hosting ferroelectricity are particularly important materials for modern technologies. The ferroelectric transition in the well-known oxides BaTiO3 and PbTiO3 is realized by softening of a vibration mode in the cubic perovskite structure. For most perovskite oxides, octahedral-site tilting systems are developed to accommodate the bonding mismatch due to a geometric tolerance factor t = (A-O)/[√2(B-O)] < 1. In the absence of cations having lone-pair electrons, e.g. Bi3+ and Pb2+, all simple and complex A-site and B-site ordered perovskite oxides with a t < 1 show a variety of tilting systems and none of them become ferroelectric...
January 15, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29334360/self-consistent-description-of-local-density-dynamics-in-simple-liquids-the-case-of-molten-lithium
#2
Anatolii Mokshin, Bulat N Galimzyanov
The dynamic structure factor is the quantity, which can be measured by means of Brillouin light-scattering as well as by means of inelastic scattering of neutrons and X-rays. The spectral (or frequency) moments of the dynamic structure factor define directly the sum rules of the scattering law. The theoretical scheme formulated in this study allows one to describe the dynamics of local density fluctuations in simple liquids and to obtain the expression of the dynamic structure factor in terms of the spectral moments...
January 15, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29333371/use-of-repeat-anterior-maxillary-distraction-to-correct-residual-midface-hypoplasia-in-cleft-patients
#3
Sunil Richardson, Shreya Krishna, Avi Bansal
Objectives: The study was designed to evaluate the efficacy of performing a second, repeat anterior maxillary distraction (AMD) to treat residual cleft maxillary hypoplasia. Materials and Methods: Five patients between the ages of 12 to 15 years with a history of AMD and with residual cleft maxillary hypoplasia were included in the study. Inclusion was irrespective of gender, type of cleft lip and palate, and the amount of advancement needed. Repeat AMD was executed in these patients 4 to 5 years after the primary AMD procedure to correct the cleft maxillary hypoplasia that had developed since the initial procedure...
December 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29331702/is-very-low-infant-birth-weight-a-predictor-for-a-five-year-course-of-depression-in-parents-a-latent-growth-curve-model
#4
Claus Barkmann, Nadine Helle, Carola Bindt
BACKGROUND: A very low birth weight (VLBW) is considered as a significant risk factor for early-onset developmental problems in infants, but is also discussed as a potential risk factor for the development of depressive symptoms in affected parents. METHODS: In this study, the 5-year courses of maternal and paternal depression with VLBW and term born infants (n = 250 families) are modeled and predicted by factors existing at the time of birth. RESULTS: The dyadic trajectories of depression could be best described by five classes (I no depression, II minor maternal depression, III increasing dyadic depression, IV significant maternal depression, V highly depressed mothers)...
December 13, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29329286/is-the-proportional-recovery-rule-applicable-to-the-lower-limb-after-a-first-ever-ischemic-stroke
#5
Janne M Veerbeek, Caroline Winters, Erwin E H van Wegen, Gert Kwakkel
OBJECTIVE: To investigate (a) the applicability of the proportional recovery rule of spontaneous neurobiological recovery to motor function of the paretic lower extremity (LE); and (b) the presence of fitters and non-fitters of this prognostic rule poststroke. When present, the clinical threshold for fitting nor non-fitting would be determined, as well as within-subject generalizability to the paretic upper extremity (UE). METHODS: Prospective cohort study in which the Fugl-Meyer Assessment (FMA)-LE and FMA-UE were measured <72 hours and 6 months poststroke...
2018: PloS One
https://www.readbyqxmd.com/read/29328792/identification-and-management-of-nontraumatic-splenic-rupture
#6
Samanthi De Silva
A 43-year old previously fit and well gentleman presented to the emergency department (ED) with a two day history of worsening epigastric pain. He had had coryzal symptoms the preceding week but had no other past medical history. He was haemodynamically stable at presentation and an ultrasound scan (US) performed in the ED could not definitively rule out intra-abdominal fluid. In view of his tender abdomen on examination and a haemoglobin level of 9.2g/dL, a computerised tomography (CT) scan was performed and revealed extensive high-density fluid within the peritoneal cavity, raising the possibility of a concealed bleed but no obvious source was identified by the scan...
December 2017: Journal of Perioperative Practice
https://www.readbyqxmd.com/read/29328294/state-switchable-and-wavelength-tunable-gain-switched-mid-infrared-fiber-laser-in-the-wavelength-region-around-2-94-%C3%AE-m
#7
Hongyu Luo, Jianfeng Li, Yongchen Hai, Xue Lai, Yong Liu
We demonstrate a gain-switched singly Ho3+-doped ZBLAN fiber laser for the first time in the wavelength region around 2.94 μm which circumvents the strong water vapor lines. Four switchable gain-switched temporal states with 1/n (n = 4,3,2,1) pump repetition rates are first observed. The influences of pump power (pulse energy), repetition rate, duty cycle (pulse duration), and laser wavelength on their characteristics are studied, respectively. The results indicate that high pump repetition rate, large pump duty cycle, and short laser wavelength are beneficial for obtaining more gain-switched temporal states...
January 8, 2018: Optics Express
https://www.readbyqxmd.com/read/29325798/evaluation-of-the-performance-of-two-tuberculosis-interferon-gamma-release-assays-igra-elisa-and-t-spot-tb-for-diagnosing-mycobacterium-tuberculosis-infection
#8
Linchuan Wang, Xu-Dong Tian, Yan Yu, Wei Chen
OBJECTIVES: The IGRA-ELISA and T-SPOT.TB are widely used in China. The aim of the study was to evaluate the performance of the two assays in diagnosis Mycobacterium tuberculosis infection. METHODS: Of the 3727 patients in the study, 204 underwent testing using both the T-SPOT.TB and IGRA-ELISA, 1794 were tested using the T-SPOT.TB only, and 1729 were tested using the IGRA-ELISA only. The positive rate and consistency of the two assays were analyzed, and their sensitivity and specificity for diagnosing active tuberculosis were compared...
January 8, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29323373/new-electron-delocalization-tools-to-describe-the-aromaticity-in-porphyrinoids
#9
Irene Casademont-Reig, Tatiana Woller, Julia Contreras-García, Mercedes Alonso, Miquel Torrent-Sucarrat, Eduard Matito
The role of aromaticity in porphyrinoids is a current subject of debate due to the intricate structure of these macrocycles, which can adopt Hückel, Möbius and even figure-eight conformers. One of the main challenges in these large π-conjugated structures is identifying the most conjugated pathway because, among aromaticity descriptors, there are very few that can be applied coherently to this variety of conformers. In this paper, we have investigated the conjugated pathways in nine porphyrinoid compounds using several aromaticity descriptors, including BLA, BOA, FLU and HOMA, as well as the recently introduced AV1245 and AVmin indices...
January 11, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29322538/predicting-reduction-potentials-of-1-3-6-triphenyl-fulvenes-using-molecular-electrostatic-potential-analysis-of-substituent-effects
#10
Bai Amutha Anjali, Cherumuttathu H Suresh
The influence of mono- and multiple substituent effect on the reduction potential (E0 ) of 1,3,6-triphenyl fulvenes is investigated using B3LYP-SMD/6-311+G(d,p) level density functional theory. The molecular electrostatic potential (MESP) minimum at the fulvene π-system (Vmin ) and the change in MESP at any of the fulvene carbon atoms (ΔVC ) for both neutral and reduced forms are used as excellent measures of substituent effect from the para and meta positions of the 1,3 and 6-phenyl moieties. Substitution at 6-phenyl para position has led to significant change in E0 than any other positions...
January 10, 2018: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29321569/xeno-free-pre-vascularized-spheroids-for-therapeutic-applications
#11
E Bauman, T Feijão, D T O Carvalho, P L Granja, C C Barrias
Spheroid culture has gained increasing popularity, arising as a promising tool for regenerative medicine applications. Importantly, spheroids may present advantages over single-cell suspensions in cell-based therapies (CT). Unfortunately, most growth media used for spheroid culture contain animal origin-components, such as fetal bovine serum (FBS). The presence of FBS compromises the safety of CT and presents economic and ethical constraints. SCC (supplement for cell culture) is a novel xeno-free (XF) industrial cell culture supplement, derived from well-controlled pooled human plasma and processed under good manufacturing practice rules...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321524/phenotypic-divergence-despite-low-genetic-differentiation-in-house-sparrow-populations
#12
Shachar Ben Cohen, Roi Dor
Studying patterns of phenotypic variation among populations can shed light on the drivers of evolutionary processes. The house sparrow (Passer domesticus) is one of the world's most ubiquitous bird species, as well as a successful invader. We investigated phenotypic variation in house sparrow populations across a climatic gradient and in relation to a possible scenario of an invasion. We measured variation in morphological, coloration, and behavioral traits (exploratory behavior and neophobia) and compared it to the neutral genetic variation...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319437/backlash-or-a-positive-response-public-opinion-of-lgb-issues-after-obergefell-v-hodges
#13
Emily Kazyak, Mathew Stange
Following Obergefell v. Hodges, same-sex marriage remains controversial and anti-LGBT state legislation has been passed, which raises questions about whether the Supreme Court's ruling may have created a backlash. We use data from two waves of a general population survey of Nebraskans conducted before and after the decision to answer three questions. First, we test three theories of how the Court decision influenced public opinion. We find that support for same-sex marriage was significantly higher following the ruling, suggesting that there was not a backlash to it...
January 10, 2018: Journal of Homosexuality
https://www.readbyqxmd.com/read/29318171/mobile-web-based-follow-up-for-postoperative-acl-reconstruction-a-single-center-experience
#14
James Higgins, John Semple, Lucas Murnaghan, Sarah Sharpe, John Theodoropoulos
Background: The initial 6 weeks after surgery has been identified as an area for improvement in patient care. During this period, the persistence of symptoms that go unchecked can lead to unscheduled emergency room and clinic visits, calls to surgeons' offices, and readmissions. Purpose: To analyze postoperative data from a previous study examining postoperative outcomes in 2 patient populations following breast reconstruction and anterior cruciate ligament (ACL) reconstruction with use of a patient-centered mobile application...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29318026/broncholithiasis-associated-with-lower-airway-inflammation-and-subsequent-pyothorax-in-a-cat
#15
Ferran Valls Sanchez, Jennifer Stewart, Catherine Bovens, Jordi Puig
Case summary: A 12-year-old female spayed domestic shorthair cat presented with history of a long-term chronic cough that had worsened during the previous 2 months. Thoracic radiographs revealed numerous mineral opacities throughout the lung fields. Multiple bronchial plugs of pale yellow material were present on bronchoscopy, consistent with broncholithiasis. Bronchoalveolar lavage cytology revealed a mild neutrophilic inflammation and bacterial culture was negative. The cat was diagnosed with chronic inflammatory lower airway disease and broncholithiasis, suspected to be due to mineralisation of secretions in the bronchial lumen...
January 2018: JFMS Open Reports
https://www.readbyqxmd.com/read/29316836/the-view-from-orthodoxy-point-counterpoint-on-globalization-and-human-rights
#16
Claudio Schuftan
The long-term trend of globalization masks a frank deterioration of the situation of the have-nots. Since 1970, polarization has grown faster than inequality, with alarming consequences for human rights and the economy overall. Globalization has continued to enrich the few at the expense of providing a decent livelihood and respecting the human rights of the many. Industrialized countries continue to be the rule makers-poor countries the rule takers. Rich countries go for growth, but an inequality-entrenching growth that brings about human rights violations and poverty...
January 1, 2018: International Journal of Health Services: Planning, Administration, Evaluation
https://www.readbyqxmd.com/read/29316329/rapid-and-safe-discharge-from-the-emergency-department-a-single-troponin-to-exclude-acute-myocardial-infarction
#17
Lisa Brichko, Hans G Schneider, William Chan, Jarrel Seah, De Villiers Smit, Anthony Dart, Jeremy P Stevens, Biswadev Mitra
OBJECTIVE: To determine variables that could facilitate safe discharge from the ED following a single high-sensitivity troponin I (HsTnI) result to exclude acute myocardial infarction (AMI). METHODS: A retrospective cohort study was performed at a tertiary hospital of all patients that had serial HsTnI performed within 12 h of arrival to the ED over a 3 year period. The primary exposure variable of interest was a very low troponin initial result (HsTnI <5 ng/L)...
January 8, 2018: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/29314650/validation-of-reflex-testing-rules-and-establishment-of-a-new-workflow-for-body-fluid-cell-analysis-using-a-sysmex-xn-550-automatic-hematology-analyzer
#18
Y-U Cho, E You, S Jang, C-J Park
INTRODUCTION: We developed and validated reflex testing rules for the microscopic examination (ME) of body fluids (BFs) on the Sysmex XN-550 (Sysmex Corporation) instrument. METHODS: We assessed the detection limits, precision, linearity, and carryover. To develop the reflex testing rules (derivation arm), we tested 515 samples and then validated the rules using another 507 samples (validation arm). RESULTS: All analytical performances were acceptable, and the carryover was negligible...
January 4, 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29314160/are-parental-self-efficacy-and-family-flexibility-mediators-of-treatment-for-anorexia-nervosa
#19
Shiri Sadeh-Sharvit, Katherine D Arnow, Lilya Osipov, James D Lock, Booil Jo, Sarah Pajarito, Harry Brandt, Elizabeth Dodge, Katherine A Halmi, Craig Johnson, Walter Kaye, Denise Wilfley, W Stewart Agras
OBJECTIVE: Family-based treatment (FBT) for adolescent anorexia nervosa (AN) promotes faster weight restoration when compared to other treatments. However, the mechanisms through which this occurs are not clarified. This study explored the trajectories of parental self-efficacy and perceived family flexibility during FBT and systemic family therapy (SyFT). We also explored whether parental self-efficacy mediates the effects of treatment on weight gain early in treatment. METHOD: 158 adolescents (12-18 years old; 89% girls) and their parents were randomized to FBT or SyFT...
January 4, 2018: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/29313541/exploring-the-hydraulic-fracturing-parameter-space-a-novel-high-pressure-high-throughput-reactor-system-for-investigating-subsurface-chemical-transformations
#20
Andrew J Sumner, Desiree L Plata
Hydraulic fracturing coupled with horizontal drilling (HDHF) involves the deep-well injection of a fracturing fluid composed of diverse and numerous chemical additives designed to facilitate the release and collection of natural gas from shale plays. Analyses of flowback wastewaters have revealed organic contamination from both geogenic and anthropogenic sources. The additional detections of undisclosed halogenated chemicals suggest unintended in situ transformation of reactive additives, but the formation pathways for these are unclear in subsurface brines...
January 9, 2018: Environmental Science. Processes & Impacts
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