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https://www.readbyqxmd.com/read/28732285/infrared-dispersion-analysis-and-raman-scattering-spectra-of-taurine-single-crystals
#1
Roberto L Moreira, Ricardo P S M Lobo, Anderson Dias
A comprehensive set of optical vibrational modes of monoclinic taurine crystals was determined by Raman scattering, and infrared reflectivity and transmission spectroscopies. By using appropriate scattering/reflection geometries, the vibrational modes were resolved by polarization and the most relevant modes of the crystal could be assigned. In particular, we were able to review the symmetry of the gerade modes and to resolve ambiguities in the literature. Owing to the non-orthogonal character of Bu modes in monoclinic crystals (lying on the optic axial plane), we carried out a generalized Lorentz dispersion analysis consisting of simultaneous adjust of infrared-reflectivity spectra at various light polarization angles...
July 14, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28732157/large-scale-statistics-for-threshold-optimization-of-optically-pumped-nanowire-lasers
#2
Juan Arturo Alanis, Dhruv Saxena, Sudha Mokkapati, Nian Jiang, Kun Peng, Xiaoyan Tang, Lan Fu, Hark Hoe Tan, Chennupati Jagadish, Patrick Parkinson
Single nanowire lasers based on bottom-up III-V materials have been shown to exhibit room-temperature near-infrared lasing, making them highly promising for use as nanoscale, silicon-integrable and coherent light sources. While lasing behavior is reproducible, small variations in growth conditions across a substrate arising from the use of bottom-up growth techniques can introduce inter-wire disorder, either through geometric or material inhomogeneity. Nanolasers critically depend on both high material quality and tight dimensional tolerances, and as such, lasing threshold is both sensitive to, and a sensitive probe of such inhomogeneity...
July 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/28732141/intraoperative-ultrasound-for-prediction-of-hepatocellular-carcinoma-biological-behavior-prospective-comparison-with-pathology
#3
Roberto Santambrogio, Claudia Cigala, Matteo Barabino, Marco Maggioni, Giovanna Scifo, Savino Bruno, Emanuela Bertolini, Enrico Opocher, Gaetano Bulfamante
BACKGROUND AND AIMS: Preoperative prediction of both microinvasive hepatocellular carcinoma and histological grade of hepatocellular carcinoma is pivotal to treatment planning and prognostication. Aim of the study was to evaluate whether some intraoperative ultrasound features correlate with both the presence of same histological patterns and differentiation grade of hepatocellular carcinoma on the histologic features of the primary resected tumor. METHODS: All patients with single, small hepatocellular carcinoma that underwent hepatic resection were included in this prospective double-blind study: the intraoperative ultrasound patterns of nodule were registered and compared with similar histological features...
July 21, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28731958/pain-catastrophizing-and-pain-health-related-quality-of-life-in-endometriosis
#4
Allison E McPeak, Catherine Allaire, Christina Williams, Arianne Albert, Sarka Lisonkova, Paul J Yong
OBJECTIVES: To determine if pain catastrophizing is independently associated with pain health-related quality-of-life in women with endometriosis, independent of potential confounders. METHODS: Analysis of cross-sectional baseline data from a prospective database at a tertiary referral center for endometriosis/pelvic pain. Referrals to the center were recruited between December 2013 to April 2015, with data collected from online patient questionnaires, physical examination, and review of medical records...
July 20, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28731839/cost-benefit-arbitration-between-multiple-reinforcement-learning-systems
#5
Wouter Kool, Samuel J Gershman, Fiery A Cushman
Human behavior is sometimes determined by habit and other times by goal-directed planning. Modern reinforcement-learning theories formalize this distinction as a competition between a computationally cheap but inaccurate model-free system that gives rise to habits and a computationally expensive but accurate model-based system that implements planning. It is unclear, however, how people choose to allocate control between these systems. Here, we propose that arbitration occurs by comparing each system's task-specific costs and benefits...
July 1, 2017: Psychological Science
https://www.readbyqxmd.com/read/28731730/uhlmann-connection-in-fermionic-systems-undergoing-phase-transitions
#6
Bruno Mera, Chrysoula Vlachou, Nikola Paunković, Vítor R Vieira
We study the behavior of the Uhlmann connection in systems of fermions undergoing phase transitions. In particular, we analyze some of the paradigmatic cases of topological insulators and superconductors in one dimension, as well as the BCS theory of superconductivity in three dimensions. We show that the Uhlmann connection signals phase transitions in which the eigenbasis of the state of the system changes. Moreover, using the established fidelity approach and the study of the edge states, we show the absence of thermally driven phase transitions in the case of topological insulators and superconductors...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731689/dinuclear-coordination-compounds-based-on-a-5-nitropicolinic-carboxylate-ligand-with-single-molecule-magnet-behavior
#7
Álvaro Raya-Barón, Itziar Oyarzabal, Francisco M Arrabal-Campos, José Manuel Seco, Antonio Rodríguez-Diéguez, Ignacio Fernández
Isostructural dinuclear dysprosium and yttrium coordination compounds based on the 5-nitropicolinic carboxylate ligand were synthesized and characterized. The formation of these air-stable complexes is achieved via solvothermal routes employing water as the reaction solvent. The dysprosium-based complex exhibits single-molecule magnet behavior with frequency dependence of the out-of-phase susceptibility at zero direct-current field. High-resolution mass spectrometry (electrospray ionization) experiments and advanced NMR methods including diffusion NMR techniques were applied on the diamagnetic yttrium analogue and established that these species retained their solid-state structure in solution with hydrodynamic radii of 6...
July 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28731631/substrate-curvature-restricts-spreading-and-induces-differentiation-of-human-mesenchymal-stem-cells
#8
Sang Joo Lee, Shengyuan Yang
While cells attach, spread, migrate, proliferate, and differentiate in three-dimensional (3D) micromechanical environments, the mechanical factors of these environments influence the shapes, sizes, and adhesion forces of the cells. Here, we culture human mesenchymal stem cells (hMSCs) on a unique class of curvature-defined substrates, micro glass ball embedded polyacrylamide gels, prepared with an improved protocol, and we investigate the spreading responses of the hMSCs on the glass balls to study the effects of substrate curvature on the spreading of hMSCs...
July 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28731583/the-effectiveness-of-transcutaneous-tibial-nerve-stimulation-ttns-for-adults-with-overactive-bladder-syndrome-a-systematic-review
#9
REVIEW
Joanne Booth, Lesley Connelly, Sylvia Dickson, Fiona Duncan, Maggie Lawrence
AIMS: To evaluate effectiveness of transcutaneous tibial nerve stimulation (TTNS) for treating adults with overactive bladder (OAB) of idiopathic or neurogenic origin, using a systematic review of the literature. METHODS: Systematic searches of four databases were undertaken between 1980 and 2017. Included studies investigated effects of TTNS on OAB. Study selection, data extraction, quality appraisal was performed by two independent reviewers. Narrative analysis was undertaken where meta-analysis was not possible due to study heterogeneity...
July 21, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28731486/demineralized-dentin-and-enamel-matrices-as-suitable-substrates-for-bone-regeneration
#10
Nina Bono, Paolo Tarsini, Gabriele Candiani
BACKGROUND: In recent decades, tooth derivatives such as dentin (D) and enamel (E) have been considered as potential graft biomaterials to treat bone defects. This study aimed to investigate the effects of demineralization on the physical-chemical and biological behavior of D and E. METHODS: Human D and E were minced into particles (Ø<1 mm), demineralized and sterilized. Thorough physical-chemical and biochemical characterizations of native and demineralized materials were performed by SEM and EDS analysis and ELISA kits to determine mineral, collagen type I and BMP-2 contents...
July 20, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28731385/kids-sip-smarter-a-feasibility-study-to-reduce-sugar-sweetened-beverage-consumption-among-middle-school-youth-in-central-appalachia
#11
Hannah Lane, Kathleen J Porter, Erin Hecht, Priscilla Harris, Vivica Kraak, Jamie Zoellner
PURPOSE: To test the feasibility of Kids SIP smartER, a school-based intervention to reduce consumption of sugar-sweetened beverages (SSBs). DESIGN: Matched-contact randomized crossover study with mixed-methods analysis. SETTING: One middle school in rural, Appalachian Virginia. PARTICIPANTS: Seventy-four sixth and seventh graders (5 classrooms) received Kids SIP smartER in random order over 2 intervention periods. Feasibility outcomes were assessed among 2 teachers...
January 1, 2017: American Journal of Health Promotion: AJHP
https://www.readbyqxmd.com/read/28731334/optical-spectra-and-magnetic-behavior-of-a-wide-range-of-europium-iii-oxo-compounds-analysis-of-the-ligand-field-effects
#12
Anna Bronova, Nils Kannengießer, Robert Glaum
The europium-oxygen interaction in nine different europium(III) oxo-compounds (including C-type Eu2O3) was investigated on the basis of powder reflectance spectra (near-IR/vis/UV) and temperature-dependent magnetic measurements. Computation of the transition energies and of the effective Bohr magneton numbers for Eu(3+) in the different ligand fields were performed within the framework of the angular overlap model (AOM) using the computer program BonnMag. These calculations show that all electronic transition energies in the optical spectra, the magnetic susceptibilities as well as their temperature dependence, are very well-accounted for by AOM...
July 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28731097/dba-induced-caspase-3-dependent-apoptosis-occurs-through-mitochondrial-translocation-of-cyt-c-in-the-rat-hippocampus
#13
Wenbo Jiang, Yingying Chen, Bai Li, Shuying Gao
Dibromoacetic acid (DBA), a by-product of disinfection, develops in drinking water during chlorination or ozonation processes. Water intake is the main source of DBA exposure in humans, which is potentially neurotoxic. The present study investigated the neurotoxic effects of DBA by assessing the behavioral and biochemical characteristics of Sprague Dawley rats intragastrically treated with DBA at concentrations of 20, 50 and 125 mg kg(-1) body weight for 28 consecutive days. The results indicated that animal weight gain and food consumption were not significantly affected by DBA...
July 21, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28731051/neurotropic-melanoma-an-analysis-of-the-clinicopathological-features-management-strategies-and-survival-outcomes-for-671-patients-treated-at-a-tertiary-referral-center
#14
Alexander H R Varey, Chris Goumas, Angela M Hong, Graham J Mann, Gerald B Fogarty, Jonathan R Stretch, Robyn P M Saw, Andrew J Spillane, Kerwin F Shannon, Kenneth J Lee, Michael J Quinn, John F Thompson, Richard A Scolyer
Neurotropic cutaneous melanoma is a rare melanoma subtype that invades nerves and is often associated with desmoplastic melanoma. Limited data suggest that it has a greater propensity to recur locally, but it is unknown whether its behavior differs from that of other melanoma subtypes, including desmoplastic melanoma. We investigated clinicopathological predictors of outcome in a cohort of 671 patients with neurotropic melanoma to develop evidence-based management recommendations. Patients with primary neurotropic melanoma diagnosed from 1985 to 2013 were identified from the Melanoma Institute Australia database, along with a control cohort of 718 non-neurotropic melanoma patients...
July 21, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28731049/composite-hemangioendothelioma-with-neuroendocrine-marker-expression-an-aggressive-variant
#15
Kyle D Perry, Alyaa Al-Lbraheemi, Brian P Rubin, Jin Jen, Hongzheng Ren, Jin Sung Jang, Asha Nair, Jaime Davila, Stefan Pambuccian, Andrew Horvai, William Sukov, Henry D Tazelaar, Andrew L Folpe
Aberrant expression of neuroendocrine markers is extremely rare in endothelial neoplasms, with only a single report describing three cases. Although originally classified as conventional angiosarcoma, further assessment of these tumors revealed a strikingly composite morphology composed of retiform and epithelioid elements reminiscent of composite hemangioendothelioma, a rare subtype of hemangioendothelioma. To further investigate these findings, available materials from 11 morphologically distinctive endothelial tumors showing neuroendocrine marker expression were retrieved from our archives...
July 21, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28731041/risk-assessment-in-solitary-fibrous-tumors-validation-and-refinement-of-a-risk-stratification-model
#16
Elizabeth G Demicco, Michael J Wagner, Robert G Maki, Vishal Gupta, Ilya Iofin, Alexander J Lazar, Wei-Lien Wang
Solitary fibrous tumors are an uncommon sarcoma type characterized by NAB2-STAT6 gene fusion. While solitary fibrous tumors metastasize in 5-25% of cases, it has historically been challenging to determine which specific tumor and patient characteristics predict aggressive behavior. We previously reported on a novel risk stratification scheme for solitary fibrous tumors incorporating patient age, tumor size, and mitotic activity to predict risk of metastasis. Herein we validate this risk stratification scheme in an independent, lower-risk population of 79 patients with primary non-meningeal solitary fibrous tumors, and propose incorporating tumor necrosis as a fourth variable to further improve the risk score...
July 21, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28730875/the-influence-of-fatalistic-beliefs-on-health-beliefs-among-diabetics-in-khartoum-sudan-a-comparison-between-coptic-christians-and-sunni-muslims
#17
Dana Hag Hamed, Marguerite Daniel
Although there are many studies assessing the influence of religious beliefs on health they do not agree on whether the impact is positive or negative. More so, there is no consensus in the available literature on the definition of fatalism and what it means to individuals. In this phenomenological study we attempt to define what religious fatalism means to people living with diabetes in Khartoum, and how it affects their health beliefs, and how those beliefs affect their sense of coherence and generalized resistance resources, since salutogenesis is the guiding theory in this study...
July 1, 2017: Global Health Promotion
https://www.readbyqxmd.com/read/28730862/correctional-officers-and-workplace-adversity-identifying-interpersonal-cognitive-and-behavioral-response-tendencies
#18
Justin S Trounson, Jeffrey E Pfeifer
This study explored correctional officers' response tendencies (i.e., cognitive, interpersonal, and behavioral response patterns they engage in) when managing workplace adversity. In total, 53 Australian correctional officers participated in the study. Eight exploratory focus group discussions ( n = 42) were conducted to identify a set of officer-endorsed response tendencies. Thematic analysis of group data revealed that correctional officers engage in a range of response tendencies when facing workplace adversity and that these tendencies may be categorized as interpersonally, cognitively, or behaviorally based...
January 1, 2017: Journal of Correctional Health Care
https://www.readbyqxmd.com/read/28730770/characteristics-and-outcomes-of-patients-with-multifocal-multicentric-and-unifocal-breast-cancer
#19
Lidija Djordjevic-Jovanovic, Aleksandar Karanikolic, Toplica Bojic, Ivan Pesic, Miodrag Djordjevic, Mirjana Marinkovic
PURPOSE: The clinical behavior and outcome of multifocal (MF) and multicentric (MC) breast tumors are not well characterized. The purpose of this study was to compare the prognosis of MF/MC tumors with unifocal (UF)tumors and its correlation with other pathological characteristics and patient outcomes. METHODS: Eighty-three patients with MC/MF breast cancer and 501 with UF breast cancer treated at the Surgical Clinic Nis were studied. We compared MC/MF and UF breast cancer patients with respect to demographics, tumor characteristics- adjuvant systemic therapy, local recurrence-free survival (LRFS) and overall survival (OS)...
May 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28730682/structure-and-development-of-the-subesophageal-zone-of-the-drosophila-brain-i-segmental-architecture-compartmentalization-and-lineage-anatomy
#20
Volker Hartenstein, Jaison J Omoto, Kathy T Ngo, Darren Wong, Philipp A Kuert, Heinrich Reichert, Jennifer K Lovick, Amelia Younossi-Hartenstein
The subesophageal zone (SEZ) of the Drosophila brain houses the circuitry underlying feeding behavior and is involved in many other aspects of sensory processing and locomotor control. Formed by the merging of four neuromeres, the internal architecture of the SEZ can be best understood by identifying segmentally reiterated landmarks emerging in the embryo and larva, and following the gradual changes by which these landmarks become integrated into the mature SEZ during metamorphosis. In previous works, the system of longitudinal fibers (connectives) and transverse axons (commissures) has been utilized as a scaffold that provides internal landmarks for the neuromeres of the larval ventral nerve cord...
July 21, 2017: Journal of Comparative Neurology
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