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https://www.readbyqxmd.com/read/29217439/in-patients-with-severe-peripheral-arterial-disease-revascularization-induced-improvement-in-lower-extremity-ischemia-can-be-detected-by-laser-speckle-contrast-imaging-of-the-fluctuation-in-blood-perfusion-after-local-heating
#1
Sotaro Katsui, Yoshinori Inoue, Yohei Yamamoto, Kimihiro Igari, Toshifumi Kudo, Hiroyuki Uetake
BACKGROUND: We previously reported the utility of the perfusion value fluctuation slope for detecting severe ischemia in the lower limb. Our approach was based on a thermal load test mimicking the well-known physiological reaction termed "cold-induced vasodilation," which is known to occur as a three-phase phenomenon. The slope parameter quantifies the decrease in perfusion values accompanying the relative cooling (third phase) following the transient increase in blood flow (second phase) induced by the applied thermal load...
December 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29214662/airborne-particulate-concentration-during-laser-hair-removal-a-comparison-between-cold-sapphire-with-aqueous-gel-and-cryogen-skin-cooling
#2
Edward V Ross, Gary S Chuang, Arisa E Ortiz, Scott A Davenport
BACKGROUND: High concentrations of sub-micron nanoparticles have been shown to be released during laser hair removal (LHR) procedures. These emissions pose a potential biohazard to healthcare workers that have prolonged exposure to LHR plume. OBJECTIVE: We sought to demonstrate that cold sapphire skin cooling done in contact mode might suppress plume dispersion during LHR. METHODS: A total of 11 patients were recruited for laser hair removal...
December 7, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29204250/generation-and-role-of-reactive-oxygen-and-nitrogen-species-induced-by-plasma-lasers-chemical-agents-and-other-systems-in-dentistry
#3
REVIEW
Nayansi Jha, Jae Jun Ryu, Eun Ha Choi, Nagendra Kumar Kaushik
The generation of reactive oxygen and nitrogen species (RONS) has been found to occur during inflammatory procedures, during cell ischemia, and in various crucial developmental processes such as cell differentiation and along cell signaling pathways. The most common sources of intracellular RONS are the mitochondrial electron transport system, NADH oxidase, and cytochrome P450. In this review, we analyzed the extracellular and intracellular sources of reactive species, their cell signaling pathways, the mechanisms of action, and their positive and negative effects in the dental field...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29195392/a-millimeter-magnetic-trap-for-a-dual-85rb-and-87rb-species-atom-interferometer
#4
J Alibert, B Décamps, M Bordoux, B Allard, A Gauguet
We present a magnetic trap for cold atoms near a surface of a millimeter-sized atom chip. The trap allows us to capture a large number of atoms with modest electrical currents (40 A) and to generate large magnetic gradients (>300 G cm-1). Here we report a mixture containing 6 × 109 atoms for the two rubidium isotopes 87Rb and 85Rb. This device does not require cleanroom facilities nor micro-machining technologies which makes its construction easier. In addition our design allows the implementation of an optical dipole trap with a laser beam passing through the chip...
November 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29164310/relevance-of-trpa1-and-trpm8-channels-as-vascular-sensors-of-cold-in-the-cutaneous-microvasculature
#5
REVIEW
Y Pan, D Thapa, L Baldissera, F Argunhan, A A Aubdool, S D Brain
Cold exposure is directly related to skin conditions, such as frostbite. This is due to the cold exposure inducing a vasoconstriction to reduce cutaneous blood flow and protect against heat loss. However, a long-term constriction will cause ischaemia and potentially irreversible damage. We have developed techniques to elucidate the mechanisms of the vascular cold response. We focused on two ligand-gated transient receptor potential (TRP) channels, namely, the established "cold sensors" TRP ankyrin 1 (TRPA1) and TRP melastin (TRPM8)...
November 21, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29154979/small-fiber-neuropathy-diagnosis-causes-and-treatment
#6
Damien Sène
Small fiber neuropathy, which affects the sensory A≏ and C fibers, is now a major diagnostic and therapeutic challenge. Nearly 7% of the general population have chronic neuropathic pain responsible for severe quality-of-life impairments. Awareness must therefore be raised among clinicians of the somatosensory and autonomic symptoms that can reveal small fiber neuropathy, appropriate diagnostic investigations, most common causes, and best treatment options for each patient profile. To help achieve this goal, the present review article discusses the clinical presentation of neuropathic pain and paresthesia and/or autonomic dysfunction due to involvement of nerves supplying exocrine glands and smooth muscle; normal findings from standard electrophysiological investigations; most informative diagnostic tests (epidermal nerve fiber density in a skin biopsy, laser-evoked potentials, heat- and cold-detection thresholds, electrochemical skin conductance); main causes, which consist chiefly of metabolic diseases (diabetes mellitus, glucose intolerance), dysimmunity syndromes (Sjögren's syndrome, sarcoidosis, monoclonal gammopathy), and genetic abnormalities (familial amyloidosis due to a transthyretin mutation, Fabry disease, sodium channel diseases); and the available symptomatic and etiological treatments...
November 15, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/29150627/high-efficiency-backward-four-wave-mixing-by-quantum-interference
#7
Zi-Yu Liu, Jian-Ting Xiao, Jia-Kang Lin, Jun-Jie Wu, Jz-Yuan Juo, Chin-Yao Cheng, Yong-Fan Chen
Electromagnetically-induced-transparency-based four-wave mixing (FWM) in a resonant four-level double-Λ system has a maximum conversion efficiency (CE) of 25% due to spontaneous emission. Herein, we demonstrate that spontaneous emission can be considerably suppressed by arranging the applied laser beams in a backward configuration. With the backward double-Λ FWM scheme, we observe a CE of 63% in cold rubidium atoms with an optical depth (OD) of 48. To the best of our knowledge, this is the first observation of a CE exceeding the conversion limit in resonant FWM processes...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29099207/observation-of-optomechanical-strain-in-a-cold-atomic-cloud
#8
Noam Matzliah, Hagai Edri, Asif Sinay, Roee Ozeri, Nir Davidson
We report the observation of optomechanical strain applied to thermal and quantum degenerate ^{87}Rb atomic clouds when illuminated by an intense, far detuned homogeneous laser beam. In this regime the atomic cloud acts as a lens that focuses the laser beam. As a backaction, the atoms experience a force opposite to the beam deflection, which depends on the atomic cloud density profile. We experimentally demonstrate the basic features of this force, distinguishing it from the well-established scattering and dipole forces...
October 20, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29098194/cowper-s-syringocele-in-adolescent-male-case-report
#9
Milena Taskovska, Simon Hawlina
Background: Cowper's syringocele is a rare condition, uncommon in the adult population. It is more common in the pediatric population. Patients could be asymptomatic or present with irritative and/or obstructive symptoms. Ultrasonography (US) of perineal region, pelvis MRI, or urethrography are the most often used diagnostic modalities. Surgical treatment is indicated in all symptomatic patients. Endoscopic approach is preferred over open surgery. Unroofing of syringocele with cold knife or holmium yttrium aluminium garnet (YAG) laser is effective treatment...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/29095502/obstetric-outcomes-after-conservative-treatment-for-cervical-intraepithelial-lesions-and-early-invasive-disease
#10
REVIEW
Maria Kyrgiou, Antonios Athanasiou, Ilkka E J Kalliala, Maria Paraskevaidi, Anita Mitra, Pierre Pl Martin-Hirsch, Marc Arbyn, Phillip Bennett, Evangelos Paraskevaidis
BACKGROUND: The mean age of women undergoing local treatment for pre-invasive cervical disease (cervical intra-epithelial neoplasia; CIN) or early cervical cancer (stage IA1) is around their 30s and similar to the age of women having their first child. Local cervical treatment has been correlated to adverse reproductive morbidity in a subsequent pregnancy, however, published studies and meta-analyses have reached contradictory conclusions. OBJECTIVES: To assess the effect of local cervical treatment for CIN and early cervical cancer on obstetric outcomes (after 24 weeks of gestation) and to correlate these to the cone depth and comparison group used...
November 2, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29091674/fleet-velocimetry-for-combustion-and-flow-diagnostics
#11
Nicholas J DeLuca, Richard B Miles, Naibo Jiang, Waruna D Kulatilaka, Anil K Patnaik, James R Gord
We report the use of femtosecond laser electronic excitation tagging (FLEET) for velocimetry at a 100-kHz imaging rate. Sequential, single-shot, quantitative velocity profiles of an underexpanded supersonic nitrogen jet were captured at a 100-kHz rate. The signal and lifetime characteristics of the FLEET emission were investigated in a methane flame above a Hencken burner at varying equivalence ratios, and room temperature gas mixtures involving air, methane, and nitrogen. In the post-flame region of the Hencken burner, the emission lifetime was measured as two orders of magnitude lower than lab air conditions...
November 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29077434/mirrorless-optical-parametric-oscillation-with-tunable-threshold-in-cold-atoms
#12
Yefeng Mei, Xianxin Guo, Luwei Zhao, Shengwang Du
We report the demonstration of a mirrorless optical parametric oscillator with a tunable threshold in laser-cooled atoms with four-wave mixing (FWM) using electromagnetically induced transparency. Driven by two classical laser beams, the generated Stokes and anti-Stokes fields counterpropagate and build up efficient intrinsic feedback through the nonlinear FWM process. This feedback does not involve any cavity or spatially distributed microstructures. We observe the transition of photon correlation properties from the biphoton quantum regime (below the threshold) to the oscillation regime (above the threshold)...
October 13, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29051593/creating-single-majorana-type-topological-zero-mode-in-superfluids-of-cold-fermionic-atoms
#13
Xiao-Shan Ye, Yong-Jun Liu, Xiu Yun Zhang, Guoqing Wu
We explore the topological phase, which involves Majorana type topological zero mode fermions (MTZFs) at the edge, using d-wave superfluid with Rashba spin-orbit coupling (SOC) interactions. The self-Hermitian of this MTZF([Formula: see text]) is similar to that of the Majorana fermions (MFs) ([Formula: see text]). We show that, to realize a single MTZF at each edge in superfluid with d-wave pairing in a Majorana type Kramers Doublet (MTKD) state, it is important to lift both the spin and the Dirac Cones degeneracies...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29026174/the-chemical-states-and-atomic-structure-evolution-of-ultralow-energy-high-dose-boron-implanted-si-110-via-laser-annealing
#14
Fu-Ying Lee, Zong-Zhe Wu, Li-Chi Kao, Feng-Mei Chang, Sheng-Wen Chen, Shiu-Ko JangJian, Hui-Yu Cheng, Wei-Liang Chen, Yu-Ming Chang, Kuang Yao Lo
Further scale down the dimension of silicon-based integrated circuit is a crucial trend in semiconductor fabrication. One of the most critical issues in the nano-device fabrication is to confirm the atomic structure evolution of the ultrathin shallow junction. In this report, UV Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure (XANES) and reflective second harmonic generation (RSHG) are utilized to monitor the pulse laser induced atomic structure evolution of ultralow-energy high-dose Boron implanted Si(110) at room and cold substrate temperature...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29018924/rapid-volumetric-photoacoustic-tomographic-imaging-with-a-fabry-perot-ultrasound-sensor-depicts-peripheral-arteries-and-microvascular-vasomotor-responses-to-thermal-stimuli
#15
Andrew A Plumb, Nam Trung Huynh, Jamie Guggenheim, Edward Zhang, Paul Beard
PURPOSE: To determine if a new photoacoustic imaging (PAI) system successfully depicts (1) peripheral arteries and (2) microvascular circulatory changes in response to thermal stimuli. METHODS: Following ethical permission, 8 consenting subjects underwent PAI of the dorsalis pedis (DP) artery, and 13 completed PAI of the index fingertip. Finger images were obtained after immersion in warm (30-35 °C) or cold (10-15 °C) water to promote vasodilation or vasoconstriction...
October 10, 2017: European Radiology
https://www.readbyqxmd.com/read/28992170/points-to-consider-raynaud-s-phenomenon-in-systemic-sclerosis
#16
REVIEW
Maurizio Cutolo, Vanessa Smith, Daniel E Furst, Dinesh Khanna, Ariane L Herrick
RP is an exaggerated vasospastic response to cold or emotion. Randomized, double-blind, placebo-controlled trials with either parallel group or cross-over trials should be mainly considered. Cross-over design, which is good for early phase trials of immediate or very short-term outcomes, is important in a condition as heterogeneous as RP: a wash-out period between treatment arms should always be included to minimize the possibility of a period (carry-over) effect. Duration of RP trials is usually constrained by the need to complete these over a single season, usually winter when the weather is colder...
September 1, 2017: Rheumatology
https://www.readbyqxmd.com/read/28990378/optimization-of-low-abundance-protein-extraction-and-abundant-protein-removal-from-defatted-soybean-meal
#17
Ming-Mei Liu, Bin Qi, Zheng-Xu Liu, Jin-Shun Zhan, Kang Zhan, Guo-Qi Zhao
The aim of this study was to optimize the conditions for the extraction of low-abundance proteins (LAPs) and the removal of abundant proteins (APs; β-conglycinin and glycinin) from soybean meal. Single factor and orthogonal experiments were designed to determine the effects of four factors (isopropanol concentration, total extraction time, ultrasonic power, and ultrasonic time) on protein concentration in isopropanol extracts. Proteins in the isopropanol supernatant and the cold acetone precipitate of isopropanol were identified by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS)...
2017: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/28987080/review-of-literature-on-low-level-laser-therapy-benefits-for-nonpharmacological-pain-control-in-chronic-pain-and-osteoarthritis
#18
Robert Dima, Vinicius Tieppo Francio, Chris Towery, Saied Davani
Introduction • Low-level laser therapy (LLLT) is a form of light therapy that triggers biochemical changes within cells. Photons are absorbed by cellular photoreceptors, triggering chemical alterations and potential biochemical benefits to the human body. LLLT has been used in pain management for years and is also known as cold laser therapy, which uses low-frequency continuous laser of typically 600 to 1000 nm wavelength for pain reduction and healing stimulation. Many studies have demonstrated analgesic and anti-inflammatory effects provided by photobiomodulation in both experimental and clinical trials...
October 2, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28975430/clinical-assessment-of-diode-laser-assisted-endoscopic-intrasphenoidal-vidian-neurectomy-in-the-treatment-of-refractory-rhinitis
#19
Wen-Sen Lai, Sheng-Yao Cheng, Yuan-Yung Lin, Pei-Lin Yang, Hung-Che Lin, Li-Hsiang Cheng, Jinn-Moon Yang, Jih-Chin Lee
For chronic rhinitis that is refractory to medical therapy, surgical intervention such as endoscopic vidian neurectomy (VN) can be used to control the intractable symptoms. Lasers can contribute to minimizing the invasiveness of ENT surgery. The aim of this retrospective study is to compare in patients who underwent diode laser-assisted versus traditional VN in terms of operative time, surgical field, quality of life, and postoperative complications. All patients had refractory rhinitis with a poor treatment response to a 6-month trial of corticosteroid nasal sprays and underwent endoscopic VN between November 2006 and September 2015...
December 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28971240/development-of-a-paper-based-lateral-flow-immunoassay-for-simultaneous-detection-of-lipopolysaccharides-of-salmonella-serovars
#20
Florian Schenk, Patricia Weber, Julian Vogler, Lars Hecht, Andreas Dietzel, Günter Gauglitz
Lateral flow type detection is becoming interesting not only in regions with a poor medical infrastructure but also for practitioners in day-to-day clinical work or for veterinary control in case of possible epidemics. In this work, we describe the first steps of development of a multi-channel strip with potential internal calibration of multiparametric and colorimetric lateral flow assays for the simultaneous detection of the lipopolysaccharides (LPS) of Salmonella typhimurium (S. typhimurium) and Salmonella enteritidis (S...
October 2, 2017: Analytical and Bioanalytical Chemistry
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