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https://www.readbyqxmd.com/read/28231623/compassion-fatigue-in-nurses-a-metasynthesis
#1
Anna G W Nolte, Charlene Downing, Annie Temane, Marie Hastings-Tolsma
AIM: The purpose of this research was to interpret the body of qualitative work focusing on compassion fatigue to distill a common understanding that could then be applied to nursing care. BACKGROUND: Complex demands place extraordinary stress on nurses struggling to work in overburdened healthcare systems. The result can be the inability to care well for others, leading to compassion fatigue, burnout, and increased numbers leaving the profession. Meta-synthesis offers a means of more fully illuminating compassion fatigue and further understanding of practices which might reduce its negative consequences...
February 23, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28231439/the-rights-of-drug-treatment-patients-experience-of-addiction-treatment-in-poland-from-a-human-rights-perspective
#2
Justyna Klingemann
BACKGROUND: Drug dependence is a recognized medical condition and therefore, right to health applies in the same way to drug dependence as it does to any other health condition. The human rights in patient care framework - which refers to the application of basic human rights principles in the delivery of health care services - was used to explore the experiences of equality in the dignity and rights protected by Polish law within four different specialist drug treatment settings in Poland...
February 20, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28231381/hippocampal-prefrontal-theta-phase-synchrony-in-planning-of-multi-step-actions-based-on-memory-retrieval
#3
Seiya Ishino, Susumu Takahashi, Masaaki Ogawa, Yoshio Sakurai
Planning of multi-step actions based on the retrieval of acquired information is essential for efficient foraging. The hippocampus (HPC) and prefrontal cortex (PFC) may play critical roles in this process. However, in rodents, many studies investigating such roles utilized T-maze tasks that only require one-step actions (i.e., selection of one of two alternatives), in which memory retrieval and selection of an action based on the retrieval cannot be clearly differentiated. In monkeys, PFC has been suggested to be involved in planning of multi-step actions; however, the synchrony between HPC and PFC has not been evaluated...
February 23, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28231293/photoacoustic-imaging-features-of-intraocular-tumors-retinoblastoma-and-uveal-melanoma
#4
Guan Xu, Yafang Xue, Zeynep Gürsel Özkurt, Naziha Slimani, Zizhong Hu, Xueding Wang, Kewen Xia, Teng Ma, Qifa Zhou, Hakan Demirci
The purpose of this study is to examine the capability of photoacoustic (PA) imaging (PAI) in assessing the unique molecular and architectural features in ocular tumors. A real-time PA and ultrasonography (US) parallel imaging system based on a research US platform was developed to examine retinoblastoma in mice in vivo and human retinoblastoma and uveal melanoma ex vivo. PA signals were generated by optical illumination at 720, 750, 800, 850, 900 and 950 nm delivered through a fiber optical bundle. The optical absorption spectra of the tumors were derived from the PA images...
2017: PloS One
https://www.readbyqxmd.com/read/28230973/unique-opto-electronic-structure-and-photo-reduction-properties-of-sulfur-doped-lead-chromates-explaining-their-instability-in-paintings
#5
Vanousheh Rahemi, Nasrin Sarmadian, Willemien Anaf, Koen Janssens, Dirk Lamoen, Bart Partoens, Karolien De Wael
Chrome yellow refers to a group of synthetic inorganic pigments that became popular as an artist's material from the second quarter of the 19th century. The color of the pigment, in which the chromate ion acts as a chromophore, is related to its chemical composition (PbCr1-xSxO4, with 0≤x≤0.8) and crystalline structure (monoclinic/orthorhombic). Their shades range from the yellow-orange to the paler yellow tones with increasing sulfate amount. These pigments show remarkable signs of degradation after limited time periods...
February 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28230915/a-singlet-oxygen-generating-agent-by-chirality-dependent-plasmonic-shell-satellite-nanoassembly
#6
Fengli Gao, Maozhong Sun, Wei Ma, Xiaoling Wu, Liqiang Liu, Hua Kuang, Chuanlai Xu
Photodynamic therapy (PDT) agent, which generates singlet oxygen ((1) O2 ) under light, has attracted significant attention for its broad biological and medical applications. Here, DNA-driven shell-satellite (SS) gold assemblies as chiral photosensitizers are first fabricated. The chiral plasmonic nanostructure, coupling with cysteine enantiomers on its surface, exhibits intense chiroplasmonic activities (-40.2 ± 2.6 mdeg) in the visible region. These chiral SS nanoassemblies have high reactive oxygen species generating efficiency under circular polarized light illumination, resulting in a (1) O2 quantum yield of 1...
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28230223/observation-of-charge-transfer-cascades-in-%C3%AE-fe2o3-irox-photoanodes-by-operando-x-ray-absorption-spectroscopy
#7
Alessandro Minguzzi, Alberto Naldoni, Ottavio Lugaresi, Elisabetta Achilli, Francesco D'Acapito, Francesco Malara, Cristina Locatelli, Alberto Vertova, Sandra Rondinini, Paolo Ghigna
Electrochemical devices for energy conversion and storage are central for a sustainable economy. The performance of electrodes is driven by charge transfer across different layer materials and an understanding of the mechanistics is pivotal to gain improved efficiency. Here, we directly observe the transfer of photogenerated charge carriers in a photoanode made of hematite (α-Fe2O3) and a hydrous iridium oxide (IrOx) overlayer, which plays a key role in photoelectrochemical water oxidation. Through the use of operando X-ray absorption spectroscopy (XAS), we probe the change in occupancy of the Ir 5d levels during optical band gap excitation of α-Fe2O3...
February 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28230156/drebrin-mediated-microtubule-actomyosin-coupling-steers-cerebellar-granule-neuron-nucleokinesis-and-migration-pathway-selection
#8
Niraj Trivedi, Daniel R Stabley, Blake Cain, Danielle Howell, Christophe Laumonnerie, Joseph S Ramahi, Jamshid Temirov, Ryan A Kerekes, Phillip R Gordon-Weeks, David J Solecki
Neuronal migration from a germinal zone to a final laminar position is essential for the morphogenesis of neuronal circuits. While it is hypothesized that microtubule-actomyosin crosstalk is required for a neuron's 'two-stroke' nucleokinesis cycle, the molecular mechanisms controlling such crosstalk are not defined. By using the drebrin microtubule-actin crosslinking protein as an entry point into the cerebellar granule neuron system in combination with super-resolution microscopy, we investigate how these cytoskeletal systems interface during migration...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28230100/product-selectivity-in-plasmonic-photocatalysis-for-carbon-dioxide-hydrogenation
#9
Xiao Zhang, Xueqian Li, Du Zhang, Neil Qiang Su, Weitao Yang, Henry O Everitt, Jie Liu
Photocatalysis has not found widespread industrial adoption, in spite of decades of active research, because the challenges associated with catalyst illumination and turnover outweigh the touted advantages of replacing heat with light. A demonstration that light can control product selectivity in complex chemical reactions could prove to be transformative. Here, we show how the recently demonstrated plasmonic behaviour of rhodium nanoparticles profoundly improves their already excellent catalytic properties by simultaneously reducing the activation energy and selectively producing a desired but kinetically unfavourable product for the important carbon dioxide hydrogenation reaction...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28229955/three-dimensional-colloidal-lithography
#10
Hironori Nagai, Austen Poteet, Xu A Zhang, Chih-Hao Chang
Light interactions with colloidal particles can generate a variety of complex three-dimensional (3D) intensity patterns, which can be utilized for nanolithography. The study of particle-light interactions can add more types of intensity patterns by manipulating key factors. Here we investigate a novel 3D nanolithography technique using colloidal particles under two-beam coherent illuminations. The fabricated 3D nanostructures are hollow, nested within periodic structures, and possess multiple chamber geometry...
February 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28229537/high-temperature-stable-perovskite-solar-cell-based-on-low-cost-carbon-nanotube-hole-contact
#11
Kerttu Aitola, Konrad Domanski, Juan-Pablo Correa-Baena, Kári Sveinbjörnsson, Michael Saliba, Antonio Abate, Michael Grätzel, Esko Kauppinen, Erik M J Johansson, Wolfgang Tress, Anders Hagfeldt, Gerrit Boschloo
Mixed ion perovskite solar cells (PSC) are manufactured with a metal-free hole contact based on press-transferred single-walled carbon nanotube (SWCNT) film infiltrated with 2,2,7,-7-tetrakis(N,N-di-p-methoxyphenylamine)-9,90-spirobifluorene (Spiro-OMeTAD). By means of maximum power point tracking, their stabilities are compared with those of standard PSCs employing spin-coated Spiro-OMeTAD and a thermally evaporated Au back contact, under full 1 sun illumination, at 60 °C, and in a N2 atmosphere. During the 140 h experiment, the solar cells with the Au electrode experience a dramatic, irreversible efficiency loss, rendering them effectively nonoperational, whereas the SWCNT-contacted devices show only a small linear efficiency loss with an extrapolated lifetime of 580 h...
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28228832/digital-pupillometry-in-normal-subjects
#12
Annekatrin Rickmann, Maria Waizel, Sara Kazerounian, Peter Szurman, Helmut Wilhelm, Karl T Boden
The aim of this study was to evaluate the pupil size of normal subjects at different illumination levels with a novel pupillometer. The pupil size of healthy study participants was measured with an infrared-video PupilX pupillometer (MEye Tech GmbH, Alsdorf, Germany) at five different illumination levels (0, 0.5, 4, 32, and 250 lux). Measurements were performed by the same investigator. Ninety images were executed during a measurement period of 3 seconds. The absolute linear camera resolution was approximately 20 pixels per mm...
February 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28228581/spaceflight-induced-synaptic-modifications-within-hair-cells-of-the-mammalian-utricle
#13
David R Sultemeier, Kristel R Choy, Felix E Schweizer, Larry F Hoffman
Exposure to the microgravity conditions of spaceflight alleviates the load normally imposed by the Earth's gravitational field upon the inner ear utricular epithelia. Previous ultrastructural investigations showed that spaceflight induced an increase in synapse density within hair cells of the rat utricle. However, the utricle exhibits broad physiologic heterogeneity across different epithelial regions, and it is unknown whether capabilities for synaptic plasticity generalize to hair cells across its topography...
February 22, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28228475/parallel-evolution-of-mound-building-and-grass-feeding-in-australian-nasute-termites
#14
Daej A Arab, Anna Namyatova, Theodore A Evans, Stephen L Cameron, David K Yeates, Simon Y W Ho, Nathan Lo
Termite mounds built by representatives of the family Termitidae are among the most spectacular constructions in the animal kingdom, reaching 6-8 m in height and housing millions of individuals. Although functional aspects of these structures are well studied, their evolutionary origins remain poorly understood. Australian representatives of the termitid subfamily Nasutitermitinae display a wide variety of nesting habits, making them an ideal group for investigating the evolution of mound building. Because they feed on a variety of substrates, they also provide an opportunity to illuminate the evolution of termite diets...
February 2017: Biology Letters
https://www.readbyqxmd.com/read/28227716/heart-activity-monitoring-using-3d-hologram-based-on-smartphone
#15
Tharoeun Thap, Heewon Chung, Jinseok Lee, Tharoeun Thap, Heewon Chung, Jinseok Lee, Tharoeun Thap, Jinseok Lee, Heewon Chung
In this paper, we used smartphone to obtained pulsatile signal from a fingertip by illuminating the skin tissue using flashlight and with an on-board camera to record the change of the light intensity reflected from the tissue. The pulsatile signal is produced by analyzing average green component values of the frames taken by the camera and the heart rate is estimated in real time by detecting the pulse peaks. Based on each instant obtained heartbeat, we design a heart animation that beats according to each interval of the heartbeat...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227678/illumination-and-device-independence-for-colorimetric-detection-of-urinary-biomarkers-with-smartphone
#16
Haakon Karisen, Tao Dong, Haakon Karisen, Tao Dong, Tao Dong
Diaper wearing elderly with functional impairments and/or incontinence is at high risk of contracting urinary tract infections. Nurses struggle with collection of urine samples for analysis. Therefore, a smartphone application is under development as a rapid screening device to work in conjunction with a colorimetric diaper assay that collects and tests urine within a diaper. The focus of this work is to make a practical and useful tool that medical personnel (the user) can use for rapid screening on patients in the field, only with a smartphone and assay available...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227567/a-method-to-assess-the-location-and-positional-stability-of-supra-choroidal-retinal-neuroprostheses
#17
Barry S Gow, Gregg J Suaning, Barry S Gow, Gregg J Suaning, Barry S Gow, Gregg J Suaning
Electrical stimulation of the retina is now firmly established as a means of restoration of rudimentary vision for blindness particularly that caused by retinitis pigmentosa. Of the various approaches, the novel positioning of an ultra-thin stimulating electrode array (SEA) posterior to the choroid has shown promising results. Following their implantation, reliable imaging methods are essential to establish the SEA's location relative to the optic disk and retinal vasculature. Because the opacity of the choroid precludes the use of conventional light-based fundus imaging, we developed an instrument (Wangiscope) that relies on infra-red illumination from LEDs...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227372/multimodal-embryonic-imaging-using-optical-coherence-tomography-selective-plane-illumination-microscopy-and-optical-projection-tomography
#18
M Singh, C Wu, D Mayerich, M E Dickinson, I V Larina, K V Larin, M Singh, C Wu, D Mayerich, M E Dickinson, I V Larina, K V Larin, I V Larina, M Singh, K V Larin, D Mayerich, M E Dickinson, C Wu
The murine model is commonly utilized for studying developmental diseases. Different optical techniques have been developed to image mouse embryos, but each has its own set of limitations and restrictions. In this study, we compare the performance of the well-established technique of optical coherence tomography (OCT) to the relatively new methods of selective plane illumination microscopy (SPIM) and optical projection tomography (OPT) to assess murine embryonic development. OCT can provide label free high resolution images of the mouse embryo, but suffers from light attenuation that limits visualization of deeper structures...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227369/hybrid-segmentation-of-fluorescent-leschmania-infected-images-using-a-watersched-and-combined-region-merging-based-method
#19
F Ouertani, H Amiri, J Bettaib, R Yazidi, A Ben Salah, F Ouertani, H Amiri, J Bettaib, R Yazidi, A Ben Salah, A Ben Salah, H Amiri, J Bettaib, R Yazidi, F Ouertani
Automatic parasite segmentation in fluorescent images is of high importance as it serves as an easier and faster tool for detecting and counting parasites in each focus. In this paper we present a hybrid segmentation for the Promastigote form of Leishmania parasites in Indirect Immunofluorescence (IIF) images, combining edge and region-based techniques through the morphological algorithm of watershed. The proposed approach deals first with a pre-processing step to correct illumination non-uniformities in the fluorescence Leishmania-infected images before performing the initial segmentation by means of the watershed algorithm...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226759/melanoma-detection-by-analysis-of-clinical-images-using-convolutional-neural-network
#20
E Nasr-Esfahani, S Samavi, N Karimi, S M R Soroushmehr, M H Jafari, K Ward, K Najarian, E Nasr-Esfahani, S Samavi, N Karimi, S M R Soroushmehr, M H Jafari, K Ward, K Najarian, M H Jafari, S M R Soroushmehr, E Nasr-Esfahani, S Samavi, K Najarian, N Karimi, K Ward
Melanoma, most threatening type of skin cancer, is on the rise. In this paper an implementation of a deep-learning system on a computer server, equipped with graphic processing unit (GPU), is proposed for detection of melanoma lesions. Clinical (non-dermoscopic) images are used in the proposed system, which could assist a dermatologist in early diagnosis of this type of skin cancer. In the proposed system, input clinical images, which could contain illumination and noise effects, are preprocessed in order to reduce such artifacts...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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