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Carola Vogel, Roman Rukwied, Lenka Stockinger, Marcus Schley, Martin Schmelz, Wolfgang Schleinzer, Christoph Konrad
: At-level and above-level hypersensitivity was assessed in patients with chronic complete thoracic spinal cord injury (SCI). Patients were classified by somatosensory mapping (brush, cold, pinprick) and assigned into two groups, i.e. patients i) with at-level hypersensitivity (SCIHs, n=8) and ii) without at-level hypersensitivity (SCINHs, n=7). Gender and age-matched healthy subjects served as controls. Quantitative sensory testing (QST), electrically- and histamine-induced pain and itch, laser Doppler imaging and laser-evoked potentials (LEP) were recorded at-level and above-level in SCI-patients...
October 21, 2016: Journal of Pain: Official Journal of the American Pain Society
Caiyun He, Guori Gao, Jianguo Zhang, Aiguo Duan, Hongmei Luo
BACKGROUND: Low temperature is one of the crucial environmental factors limiting the productivity and distribution of plants. Sea buckthorn (Hippophae rhamnoides L.), a well recognized multipurpose plant species, live successfully in in cold desert regions. But their molecular mechanisms underlying cold tolerance are not well understood. METHODS: Physiological and biochemical responses to low-temperature stress were studied in seedlings of sea buckthorn. Differentially expressed protein spots were analyzed using multiplexing fluorescent two-dimensional fluorescence difference gel electrophoresis (2D-DIGE) coupled with matrix-assisted laser desorption/ionization (MALDI) time-of-flight/time-of-flight (TOF/TOF) mass spectrometry (MS), the concentration of phytohormone was measured using enzyme-linked immunosorbent assay, and a spectrophotometric assay was used to measure enzymatic reactions...
2016: Proteome Science
Yuguang Wang, Ying-Ying Huang, Yong Wang, Peijun Lyu, Michael R Hamblin
Photobiomodulation (PBM) using red or near-infrared (NIR) light has been used to stimulate the proliferation and differentiation of adipose-derived stem cells. The use of NIR wavelengths such as 810nm is reasonably well accepted to stimulate mitochondrial activity and ATP production via absorption of photons by cytochrome c oxidase. However, the mechanism of action of 980nm is less well understood. Here we study the effects of both wavelengths (810nm and 980nm) on adipose-derived stem cells in vitro. Both wavelengths showed a biphasic dose response, but 810nm had a peak dose response at 3J/cm(2) for stimulation of proliferation at 24h, while the peak dose for 980nm was 10-100 times lower at 0...
October 15, 2016: Biochimica et Biophysica Acta
Thiago César Lima, Natália Maria Vieira-Barbosa, Camila Grasielli de Sá Azevedo, Fabiana Rodrigues de Matos, Dhelfeson Willya Douglas de Oliveira, Evandro Silveira de Oliveira, Maria Letícia Ramos-Jorge, Patricia Furtado Gonçalves, Olga Dumont Flecha
BACKGROUND: The aim of this longitudinal study was to verify changes in patients' oral health related quality of life 180 days after the treatment of dentin hypersensitivity with laser and cyanoacrylate. METHODS: This clinical, controlled, randomized, double-blind trial used a split-mouth design, and quadrants were randomized to receive either laser or cyanoacrylate treatments. All patients received both treatments. The study included 62 patients from 12-60 years of age (mean: 31...
October 7, 2016: Journal of Periodontology
Kwang-Kyoon Park, Tian-Ming Zhao, Jong-Chan Lee, Young-Tak Chough, Yoon-Ho Kim
We demonstrate a coherent and dynamic beam splitter based on light storage in cold atoms. An input weak laser pulse is first stored in a cold atom ensemble via electromagnetically-induced transparency (EIT). A set of counter-propagating control fields, applied at a later time, retrieves the stored pulse into two output spatial modes. The high visibility interference between the two output pulses clearly demonstrates that the beam splitting process is coherent. Furthermore, by manipulating the control lasers, it is possible to dynamically control the storage time, the power splitting ratio, the relative phase, and the optical frequencies of the output pulses...
September 28, 2016: Scientific Reports
Venkateshbabu Nagendrababu, James L Gutmann
OBJECTIVE: Reducing the pain after root canal therapy is a key aspect in endodontic practice. The present systematic review aimed to identify the factors that influence postobturation pain (POP) in patients receiving single-visit nonsurgical root canal treatment. DATA SOURCES: A literature search was performed manually and in Pubmed (Medline) database to identify relevant articles. A data extraction form was constructed and data were collected from the identified articles...
September 26, 2016: Quintessence International
Lirong Chen, Zhongxiao Xu, Weiqing Zeng, Yafei Wen, Shujing Li, Hai Wang
We report an experiment in which long-lived quantum memories for photonic polarization qubits (PPQs) are controllably released into any one of multiple spatially-separate channels. The PPQs are implemented with an arbitrarily-polarized coherent signal light pulses at the single-photon level and are stored in cold atoms by means of electromagnetic-induced-transparency scheme. Reading laser pulses propagating along the direction at a small angle relative to quantum axis are applied to release the stored PPQs into an output channel...
September 26, 2016: Scientific Reports
Andreas Dechant, Shalom Tzvi Shafier, David A Kessler, Eli Barkai
The Boltzmann-Gibbs density, a central result of equilibrium statistical mechanics, relates the energy of a system in contact with a thermal bath to its equilibrium statistics. This relation is lost for nonthermal systems such as cold atoms in optical lattices, where the heat bath is replaced with the laser beams of the lattice. We investigate in detail the stationary phase-space probability for Sisyphus cooling under harmonic confinement. In particular, we elucidate whether the total energy of the system still describes its stationary state statistics...
August 2016: Physical Review. E
Yueh-Ling Hsieh, Li-Wei Chou, Shao-Fu Hong, Fei-Chi Chang, Szu-Wen Tseng, Chi-Chou Huang, Ching-Hsiang Yang, Chen-Chia Yang, Wei-Feng Chiu
BACKGROUND: Oxaliplatin is a platinum compound that is widely used in the treatment of some solid tumours. Oxaliplatin-induced peripheral neuropathy (OIPN) in the upper and lower extremities is the major adverse side effect and represents the main dose-limiting factor of this drug. The aim of this single-arm study was to evaluate the feasibility and effects of laser acupuncture (LA) in the treatment of OIPN in patients with advanced gastrointestinal cancers. METHODS: 17 gastrointestinal cancer survivors (14 colorectal and 3 gastric cancers), who had been treated with oxaliplatin-based chemotherapies, were recruited...
October 2016: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
Haiyi Sun, Yonghong Liu, Jingjing Ju, Ye Tian, Yafeng Bai, Yaoxiang Liu, Shengzhe Du, Cheng Wang, Tiejun Wang, Jiansheng Liu, See Leang Chin, Ruxin Li, Zhizhan Xu
We investigated water condensation in a laboratory cloud chamber induced by picosecond (ps) laser pulses at ~350 ps (800 nm/1-1000 Hz) with a maximum peak power of ~25 MW. The peak power was much lower than the critical power for self-focusing in air (~3-10 GW depending on the pulse duration). Sparks, airflow and snow formation were observed under different laser energies or repetition rates. It was found that weaker ps laser pulses can also induce water condensation by exploding and breaking down ice crystals and/or water droplets into tiny particles although there was no formation of laser filament...
September 5, 2016: Optics Express
Francesco Mattioli, Livio Presutti, Marco Caversaccio, Marco Bonali, Lukas Anschuetz
OBJECTIVE: We aimed to develop and validate an ex vivo dissection station for endolaryngeal surgery suitable for different kinds of laryngeal specimen and any type of operating technique (CO2 laser, cold instruments by endoscopic or microscopic techniques). STUDY DESIGN: Experimental construction and validation of a highly specialized dissection station. SETTING: Laboratory and international dissection course. METHODS: We designed a lightweight dissection station made of polycarbonate resin approved for use with a CO2 laser...
September 6, 2016: Otolaryngology—Head and Neck Surgery
Alireza Raissadati, Raimo Tuuminen, Alexey Dashkevich, Maija Bry, Riikka Kivelä, Andrey Anisimov, Simo Syrjälä, Ralica Arnaudova, Eeva Rouvinen, Mikko Ai Keränen, Rainer Krebs, Antti I Nykänen, Karl B Lemström
OBJECTIVES: Cardiac vascular endothelial growth factor-B transgene limits myocardial damage in rat infarction models. We investigated whether heart transplant vascular endothelial growth factor-B overexpression protected against ischemia-reperfusion injury. MATERIALS AND METHODS: We transplanted hearts heterotopically from Dark Agouti to Wistar Furth rats. To characterize the role of vascular endothelial growth factor-B in ischemia-reperfusion injury, we transplanted either long-term human vascular endothelial growth factor-B transgene overexpressing hearts from Wistar Furth rats or short-term adeno-associated virus 9-human vascular endothelial growth factor-B-transduced hearts from Dark Agouti rats into Wistar Furth rats...
September 1, 2016: Experimental and Clinical Transplantation
Michelle O Araújo, Ivor Krešić, Robin Kaiser, William Guerin
Superradiance has been extensively studied in the 1970s and 1980s in the regime of superfluorescence, where a large number of atoms are initially excited. Cooperative scattering in the linear-optics regime, or "single-photon superradiance," has been investigated much more recently, and superradiant decay has also been predicted, even for a spherical sample of large extent and low density, where the distance between atoms is much larger than the wavelength. Here, we demonstrate this effect experimentally by directly measuring the decay rate of the off-axis fluorescence of a large and dilute cloud of cold rubidium atoms after the sudden switch off of a low-intensity laser driving the atomic transition...
August 12, 2016: Physical Review Letters
Pascal Eberle, Alexander D Dörfler, Claudio Von Planta, Krishnamurthy Ravi, Stefan Willitsch
We present a dynamic ion-atom hybrid trap for studies of cold ion-neutral collisions and reactions with a significantly improved energy resolution compared to previous experiments. Our approach is based on pushing a cloud of laser-cooled Rb atoms through a stationary Coulomb crystal of cold ions using precisely controlled, tunable radiation-pressure forces. We demonstrate the tuning of the atom kinetic energies over an interval ranging from 30 mK up to 350 mK with energy spreads as low as 24 mK inferred from the comparison of experimental time-of-flight measurements with Monte Carlo trajectory simulations...
August 24, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
I Karagyozov
For the period of 5 years (2008-2012) at the outpatient department and the operation theater of Tokuda hospital 280 conisations were done--135 lasers and 145 cold knifes. Indications for the operation were common, with no specific choice for the aim of comparison. All patients had proven colposcopic or histologic dysplasia of the cervix. The operations were performed 2 or 3 days after menstruation. Laser conisations received local anesthesia and were not hospitalized. Cold knife conisations were done at the operation theater under regional anesthesia, they attended the hospital for 24 hours, had vaginal tapenade and urethral catheter...
2016: Akusherstvo i Ginekologii︠a︡
Steven J Schowalter, Alexander J Dunning, Kuang Chen, Prateek Puri, Christian Schneider, Eric R Hudson
Sympathetic cooling of trapped ions through collisions with neutral buffer gases is critical to a variety of modern scientific fields, including fundamental chemistry, mass spectrometry, nuclear and particle physics, and atomic and molecular physics. Despite its widespread use over four decades, there remain open questions regarding its fundamental limitations. To probe these limits, here we examine the steady-state evolution of up to 10 barium ions immersed in a gas of three-million laser-cooled calcium atoms...
2016: Nature Communications
Satish Nair, Ajith Nilakantan, Amit Sood, Atul Gupta, Abhishek Gupta
Laryngeal stenosis is one of the most complex and challenging problems in the field of head and neck surgery. The management involves a multidisciplinary approach with multiple complex procedures. In this study we discuss our experience of laryngeal stenosis with regards to patient characteristics, cause and management. A retrospective analysis of 35 patients of laryngeal stenosis treated at a tertiary care centre was evaluated. Inclusion criteria were all patients with laryngeal stenosis who required surgical intervention...
September 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
Renato Garcia, Daniel C de Andrade, Manoel J Teixeira, Siro S Nozaki, Samir J Bechara
OBJECTIVE: The cornea is the target of most surgeries for refractive disorders, as myopia. It is estimated that almost 1 million patients undergo corneal refractive surgery each year in the United States. Refractive surgery includes photorefractive keratectomy (PRK) that produces intense postoperative pain. This review presents the main pain mechanisms behind PRK-related pain and the available therapeutic options for its management. METHODS: Data sources included literature of cornea anatomy, treatment of PRK postoperative pain, mechanisms of corneal pain, in 3 electronic databases: Pubmed, Scopus, and Web of Science...
May 2016: Clinical Journal of Pain
Anton S Tremsin, Supriyo Ganguly, Sonia M Meco, Goncalo R Pardal, Takenao Shinohara, W Bruce Feller
A nondestructive study of the internal structure and compositional gradient of dissimilar metal-alloy welds through energy-resolved neutron imaging is described in this paper. The ability of neutrons to penetrate thick metal objects (up to several cm) provides a unique possibility to examine samples which are opaque to other conventional techniques. The presence of Bragg edges in the measured neutron transmission spectra can be used to characterize the internal residual strain within the samples and some microstructural features, e...
August 1, 2016: Journal of Applied Crystallography
Syarifah N Al-Yahya, Marina Mat Baki, Sakina Mohd Saad, Mawaddah Azman, Abdullah Sani Mohamad
UNLABELLED: A systematic review on laryngopyoceles across Ovid, PubMed, and Google Scholar database was conducted. A total of 61 papers published between 1952 and 2015 were found. Of these, 23 cases written in English, which described the number of cases, surgical approaches, resort to tracheostomy, complications, and outcomes, were shortlisted. Four cases of laryngopyoceles were managed endoscopically using a cold instrument, microdebrider, or laser. Eighteen cases were operated via an external approach, and 1 case applied both approaches...
July 2016: Annals of Saudi Medicine
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