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Direct observation

Nancy Wang, Matthias Osswald
The majority of meningiomas, the most common primary brain tumor, are considered to be benign, and characteristic magnetic resonance imaging features allow a preliminary diagnosis. Meningiomas can be classified in the World Health Organization system as grade I, II, or III, depending on various histological features. In many cases, observation is the preferred management option, although this means the absence of a histological diagnosis. If necessary, standard therapy consists of surgery with or without adjuvant radiation, depending on the tumor grade and the degree of resection...
February 2018: Seminars in Neurology
Christine A DeForest, Virginia Blackman, John E Alex, Lauren Reeves, Alejandra Mora, Crystal Perez, Joseph Maddry, Domenique Selby, Benjamin Walrath
Introduction: Military prehospital and en route care (ERC) directly impacts patient morbidity and mortality. Provider knowledge and skills are critical variables in the effectiveness of ERC. No Navy doctrine defines provider choice for patient transport or requires standardized provider training. Frequently, Search and Rescue Medical Technicians (SMTs) and Navy Nurses (ERC RNs) are tasked with this mission though physicians have also been used. Navy ERC provider training varies greatly by professional role...
March 14, 2018: Military Medicine
Weihua Peng, Xiaomin Li, Tong Liu, Yingying Liu, Jinqian Ren, Dawei Liang, Wenhong Fan
Sulfate reducing bacteria (SRB) was used to stabilize cadmium (Cd) in sediments spiked with Cd. The study found that the Cd in sediments (≤600 mg kg-1 ) was successfully stabilized after 166 d SRB bio-treatment. This was verified by directly and indirectly examining Cd speciation in sediments, mobilization index, and Cd content in interstitial water. After 166 d bio-treatment, compared with control groups, Cd concentrations in interstitial water of Cd-spiked sediments were reduced by 77.6-96.4%. The bioavailable fractions of Cd (e...
March 1, 2018: Chemosphere
Ulviye Günay, Gülsen Kılınç
BACKGROUND: Nursing education contains both theoretical and practical training processes. Clinical training is the basis of nursing education. The quality of clinical training is closely related to the quality of the clinical learning environment. OBJECTIVES: This study aimed to determine the transfer of theoretical knowledge into clinical practice by nursing students and the difficulties they experience during this process. METHODS: A qualitative research design was used in the study...
March 1, 2018: Nurse Education Today
Evangelia-Chrysanthi Kouklari, Stella Tsermentseli, Bonnie Auyeung
BACKGROUND: The association between Executive Function (EF) and Theory of Mind (ToM) in autism spectrum disorder (ASD) has been mainly investigated using false belief tasks, whilst less is known about the EF effect on other ToM facets. Furthermore, the role EF plays in social communication in ASD is mainly assessed using parent-report EF ratings rather than direct assessment. AIMS: The aim of this study was to shed more light on the effect of performance-based EF measures on ToM and social communication in middle childhood in ASD relative to neurotypical controls...
March 13, 2018: Research in Developmental Disabilities
Julia K Nussbacher, Gene W Yeo
RNA binding proteins (RBPs) interact with primary, precursor, and mature microRNAs (miRs) to influence mature miR levels, which in turn affect critical aspects of human development and disease. To understand how RBPs contribute to miR biogenesis, we analyzed human enhanced UV crosslinking followed by immunoprecipitation (eCLIP) datasets for 126 RBPs to discover miR-encoding genomic loci that are statistically enriched for RBP binding. We find that 92% of RBPs interact directly with at least one miR locus, and that some interactions are cell line specific despite expression of the miR locus in both cell lines evaluated...
March 15, 2018: Molecular Cell
Audrey M Bernstein, Robert Ritch, J Mario Wolosin
Exfoliation syndrome (XFS) is an age-related disease involving the deposition of aggregated fibrillar material (XFM) at extracellular matrices in tissues that synthesize elastic fibers. Its main morbidity is in the eye, where XFM accumulations form on the surface of the ciliary body, iris and lens. Exfoliation glaucoma (XFG) occurs in a high proportion of persons with XFS and can be a rapidly progressing disease. Worldwide, XFG accounts for about 25% of open-angle glaucoma cases. XFS and XFG show a sharp age-dependence, similarly to the many age-related diseases classified as aggregopathies...
March 15, 2018: Journal of Glaucoma
Sana Ali Bautista, Edward J Wladis, Robert L Schultze
PURPOSE: Muller's muscle-conjunctival resection (MMCR) is a highly effective technique to correct upper eyelid ptosis. However, several authorities have raised concerns about the possibility of postoperative ocular surface dryness. This study was performed to assess the impact of MMCR on clinically meaningful parameters of the ocular surface. METHODS: In adult patients, tear break-up time, lipid layer thickness, and osmolarity were measured via direct observation, interferometry, and impedance measurements before surgery and 3 months after surgery in patients who underwent MMCR...
March 14, 2018: Ophthalmic Plastic and Reconstructive Surgery
Caleb J Bashor, James J Collins
Engineering synthetic gene regulatory circuits proceeds through iterative cycles of design, building, and testing. Initial circuit designs must rely on often-incomplete models of regulation established by fields of reductive inquiry-biochemistry and molecular and systems biology. As differences in designed and experimentally observed circuit behavior are inevitably encountered, investigated, and resolved, each turn of the engineering cycle can force a resynthesis in understanding of natural network function...
March 16, 2018: Annual Review of Biophysics
T R Hartke, Y-Y Liu, M J Gullans, J R Petta
Quantum confinement leads to the formation of discrete electronic states in quantum dots. Here we probe electron-phonon interactions in a suspended InAs nanowire double quantum dot (DQD) that is electric-dipole coupled to a microwave cavity. We apply a finite bias across the wire to drive a steady state population in the DQD excited state, enabling a direct measurement of the electron-phonon coupling strength at the DQD transition energy. The amplitude and phase response of the cavity field exhibit oscillations that are periodic in the DQD energy level detuning due to the phonon modes of the nanowire...
March 2, 2018: Physical Review Letters
Hans G Rinderknecht, H-S Park, J S Ross, P A Amendt, D P Higginson, S C Wilks, D Haberberger, J Katz, D H Froula, N M Hoffman, G Kagan, B D Keenan, E L Vold
The structure of a strong collisional shock front forming in a plasma is directly probed for the first time in laser-driven gas-jet experiments. Thomson scattering of a 526.5 nm probe beam was used to diagnose temperature and ion velocity distribution in a strong shock (M∼11) propagating through a low-density (ρ∼0.01  mg/cc) plasma composed of hydrogen. A forward-streaming population of ions traveling in excess of the shock velocity was observed to heat and slow down on an unmoving, unshocked population of cold protons, until ultimately the populations merge and begin to thermalize...
March 2, 2018: Physical Review Letters
Bartłomiej Czech, Lampros Lamprou, Samuel McCandlish, James Sully
The Berry connection describes transformations induced by adiabatically varying Hamiltonians. We study how zero modes of the modular Hamiltonian are affected by varying the region that supplies the modular Hamiltonian. In the vacuum of a 2D conformal field theory, global conformal symmetry singles out a unique modular Berry connection, which we compute directly and in the dual three-dimensional anti-de Sitter (AdS_{3}) picture. In certain cases, Wilson loops of the modular Berry connection compute lengths of curves in AdS_{3}, reproducing the differential entropy formula...
March 2, 2018: Physical Review Letters
Syeda Sabrina, Mykola Tasinkevych, Suzanne Ahmed, Allan M Brooks, Monica Olvera de la Cruz, Thomas E Mallouk, Kyle J M Bishop
The propulsion of micro- and nanoparticles using ultrasound is an attractive strategy for the remote manipulation of colloidal matter using biocompatible energy inputs. However, the physical mechanisms underlying acoustic propulsion are poorly understood, and our ability to transduce acoustic energy into different types of particle motions remains limited. Here, we show that the three-dimensional shape of a colloidal particle can be rationally engineered to direct desired particle motions powered by ultrasound...
March 16, 2018: ACS Nano
Neil E O'Connell, Louise Marston, Sally Spencer, Lorraine H DeSouza, Benedict M Wand
BACKGROUND: This is an updated version of the original Cochrane Review published in 2010, Issue 9, and last updated in 2014, Issue 4. Non-invasive brain stimulation techniques aim to induce an electrical stimulation of the brain in an attempt to reduce chronic pain by directly altering brain activity. They include repetitive transcranial magnetic stimulation (rTMS), cranial electrotherapy stimulation (CES), transcranial direct current stimulation (tDCS), transcranial random noise stimulation (tRNS) and reduced impedance non-invasive cortical electrostimulation (RINCE)...
March 16, 2018: Cochrane Database of Systematic Reviews
Vinayak Narayan, Hima Pendharkar, Bhagavatula Indira Devi, Dhananjaya I Bhat, Dhaval P Shukla
Background: The conventional medical management of cerebral vasospasm following aneurysmal subarachnoid hemorrhage (SAH) is associated with uncertainty of outcome and complications. Aims and Objectives: To examine the effect of direct intra-arterial nimodipine therapy on outcome in patients with delayed cerebral ischemia (DCI). Settings and Design: The retrospective observational study was conducted at a single neurosurgical unit and interventional neuroradiolgy suite of a center managing SAH...
March 2018: Neurology India
Oriol Blázquez, Gemma Martín, Ivan Camps, Antonio Mariscal, Julian López-Vidrier, Joan Manel Ramirez, Sergi Hernández, Sonia Estrade, Francesca Peiro, Rosalía Serna, Blas Garrido
The resistive switching properties of silicon-aluminium oxynitride (SiAlON) based devices have been studied. Electrical transport mechanisms at both resistance states were determined, exhibiting an ohmic behaviour at low resistant state and a defect-related Poole-Frenkel mechanism at high resistant state. Nevertheless, some features on the Al top-electrode are generated during the initial electroforming, suggesting some material modifications. An in-depth microscopic study at the nanoscale have been performed after the electroforming process, by acquiring scanning electron microscopy and transmission electron microscopy images...
March 16, 2018: Nanotechnology
Christina H Stuelten, Carole A Parent, Denise J Montell
Metastasis remains the greatest challenge in the clinical management of cancer. Cell motility is a fundamental and ancient cellular behaviour that contributes to metastasis and is conserved in simple organisms. In this Review, we evaluate insights relevant to human cancer that are derived from the study of cell motility in non-mammalian model organisms. Dictyostelium discoideum, Caenorhabditis elegans, Drosophila melanogaster and Danio rerio permit direct observation of cells moving in complex native environments and lend themselves to large-scale genetic and pharmacological screening...
March 16, 2018: Nature Reviews. Cancer
Sunandan Mukherjee, Chandran Nithin, Yasaswi Divakaruni, Ranjit Prasad Bahadur
We dissect the protein-protein interfaces into water preservation (WP), water hydration (WH) and water dehydration (WD) sites by comparing the water mediated hydrogen bonds (H-bond) in the bound and unbound states of the interacting subunits. Upon subunit complexation, if a H-bond between an interface water and a protein polar group is retained, we assign it as WP site; if it is lost, we assign it as WD site and if a new H-bond is created, we assign it as WH site. We find that the density of WD sites is highest followed by WH and WP sites except in antigen and (or) antibody complexes, where the density of WH sites is highest followed by WD and WP sites...
March 16, 2018: Journal of Biomolecular Structure & Dynamics
Sophie Meuret, Toon Coenen, Steffi Woo, Yong-Ho Ra, Zetian Mi, Albert Polman
Cathodoluminescence (CL) imaging spectroscopy provides two-dimensional optical excitation images of photonic nanostructures with deep-subwavelength spatial resolution. So far, CL imaging was unable to provide a direct measurement of the excitation and emission probabilities of photonic nanostructures in a spatially resolved manner. Here, we demonstrate that by mapping the cathodoluminescence autocorrelation function g(2) together with the CL spectral distribution the excitation and emission rates can be disentangled at every excitation position...
March 16, 2018: Nano Letters
Ruchi Singh, Jagdish C Suri, Renuka Sharma, Tejas Suri, Tulsi Adhikari
OBJECTIVES: To examine the sleep pattern and observe differences in sleep routines, phase preferences, mood, attendance, and academic performance among different adolescent age students. Secondly, to observe the age at which sleep phase transition and changes in sleep requirement become evident. METHODS: A cross-sectional study was conducted among 501 students (aged 11-15 y) of a school in Delhi, India. Students were evaluated for their sleep patterns, sleep duration, habits of napping, quality of sleep, sleepiness, depression, phase preferences by self-reported school sleep habits survey questionnaire along with school performance and attendance...
March 16, 2018: Indian Journal of Pediatrics
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