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https://www.readbyqxmd.com/read/28643046/clinical-evaluation-of-the-efficacy-and-safety-of-combined-bipolar-radiofrequency-and-optical-energies-vs-optical-energy-alone-for-the-treatment-of-aging-hands
#1
Ines Verner, Tuvia Dror Kutscher
Different treatment modalities are used for the treatment and esthetic improvement of aging hands. This study evaluated the efficacy and safety of a novel technology, which combines bipolar radio frequency (RF) and optical energies for the cosmetic treatment of aging hands. The objective of the study was to assess the efficacy, safety, tolerability, and patient satisfaction of combined bipolar radiofrequency and optical energies vs. optical energy alone for the treatment of aging hands. Thirteen female patients with solar lentigines on the back of the hands were enrolled...
June 23, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28618476/bremsstrahlung-from-the-interaction-of-short-laser-pulses-with-dielectrics
#2
G M Petrov, J P Palastro, J Peñano
An intense, short laser pulse incident on a transparent dielectric can excite electrons from the valence to the conduction band. As these electrons undergo scattering, both from phonons and ions, they emit bremsstrahlung. Here we present a theory of bremsstrahlung emission appropriate for the interaction of laser pulses with dielectrics. Simulations of the interaction, incorporating this theory, illustrate characteristics of the radiation (power, energy, and spectra) for arbitrary ratios of electron collision frequency to radiation frequency...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28609301/a-light-weight-compact-proton-gantry-design-with-a-novel-dose-delivery-system-for-broad-energetic-laser-accelerated-beams
#3
U Masood, T E Cowan, W Enghardt, K M Hofmann, L Karsch, F Kroll, U Schramm, J J Wilkens, J Pawelke
Proton beams may provide superior dose-conformity in radiation therapy. However, the large sizes and costs limit the widespread use of proton therapy (PT). The recent progress in proton acceleration via high-power laser systems has made it a compelling alternative to conventional accelerators, as it could potentially reduce the overall size and cost of the PT facilities. However, the laser-accelerated beams exhibit different characteristics than conventionally accelerated beams, i.e. very intense proton bunches with large divergences and broad-energy spectra...
July 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28602137/immediate-and-short-term-effects-of-phototherapy-on-pain-muscle-activity-and-joint-mobility-in-women-with-temporomandibular-disorder-a-randomized-double-blind-placebo-controlled-clinical-trial
#4
Carolina Marciela Herpich, Ernesto Cesar Pinto Leal-Junior, Cid Andre Fidelis de Paula Gomes, Igor Phillip Dos Santos Gloria, Ana Paula Amaral, Maitê de Freitas de Rocha Souza Amaral, Fabiano Politti, Daniela Aparecida Biasotto-Gonzalez
OBJECTIVES: The aim of the present study was to evaluate the immediate and short-term effects of phototherapy on pain intensity, the pressure pain threshold (PPT), maximum vertical mandibular movement, and the electrical activity of the masseter and temporal muscles in women with temporomandibular disorder (TMD). METHODS: Sixty women were randomly allocated to four different groups and submitted to phototherapy with a combination of super-pulsed laser (905 nm), red (640 nm), and infrared (875 nm) light emitting diodes in the same equipment on the masseter (three points) and temporal (two points) muscles bilaterally in a single session...
June 11, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28590727/capturing-chemistry-in-action-with-electrons-realization-of-atomically-resolved-reaction-dynamics
#5
Anatoly A Ischenko, Peter M Weber, R J Dwayne Miller
One of the grand challenges in chemistry has been to directly observe atomic motions during chemical processes. The depiction of the nuclear configurations in space-time to understand barrier crossing events has served as a unifying intellectual theme connecting the different disciplines of chemistry. This challenge has been cast as an imaging problem in which the technical issues reduce to achieving not only sufficient simultaneous space-time resolution but also brightness for sufficient image contrast to capture the atomic motions...
June 7, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28585267/intense-pulsed-light-treatment-and-meibomian-gland-expression-for-moderate-to-advanced-meibomian-gland-dysfunction
#6
Julie M Albietz, Katrina L Schmid
BACKGROUND: The aim was to evaluate the efficacy of periocular intense pulsed light therapy combined with meibomian gland expression for chronic dry eye due to moderate to advanced meibomian gland dysfunction. METHODS: This single-institution, open-label prospective study involved 26 participants who received bilateral treatments using a proprietary intense pulsed light device (E > Eye, E-Swin, Paris, France) combined with therapeutic meibomian gland expression at baseline, Week 2 and Week 6...
June 6, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28575172/longitudinal-changes-in-excess-pressure-independently-predict-declining-renal-function-among-healthy-individuals-a-pilot-study
#7
Rachel E D Climie, Dean S Picone, James E Sharman
BACKGROUND: Aortic reservoir function independently predicts end-organ damage in cross-sectional analyses. However, longitudinal associations are more important regarding causation, but this has never been examined at rest or in response to light-moderate intensity exercise. The aim of this study was to determine the association between the change in aortic reservoir characteristics, in particular excess pressure integral (Pexcess) at rest and in response to exercise and the change in kidney function among healthy individuals followed over time...
May 30, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28566926/intense-pulsed-light-increases-hyaluronan-and-cd44-in-epidermal-keratinocytes-and-improves-age-related-epidermal-structure-defects-in-mice
#8
Sang Eun Lee, Hye Rang On, Jung Min Lim, Sang Jin Kang, Ji-Ye Song, Hee Jung Lee
No abstract text is available yet for this article.
June 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28566911/intense-pulsed-light-and-q-switched-1-064-nm-neodymium-doped-yttrium-aluminum-garnet-laser-treatment-for-the-scarring-lesion-of-discoid-lupus-erythematosus
#9
Yun Sun Byun, Jee Hee Son, Yong Se Cho, Bo Young Chung, Hee Jin Cho, Chun Wook Park, Hye One Kim
Discoid lupus erythematosus (DLE) is a chronic form of cutaneous lupus that can cause permanent scarring. Treatment of DLE includes protection from sunlight and artificial sources of ultraviolet light, as well as systemic and topical medications. The first-line standard therapies are antimalarials and topical steroids. Other systemic therapies include systemic steroid, azathioprine, dapsone, and immunosuppressive agents. Topical tacrolimus and pimecrolimus have also been evaluated. Recent studies reported that several treatments, including pulsed dye laser, CO2 laser, intense pulsed light (IPL), and 1,064-nm long-pulse neodymium-doped yttrium aluminum (Nd:YAG) have been used for the cosmetic treatment of DLE...
June 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28561017/anapole-nanolasers-for-mode-locking-and-ultrafast-pulse-generation
#10
Juan S Totero Gongora, Andrey E Miroshnichenko, Yuri S Kivshar, Andrea Fratalocchi
Nanophotonics is a rapidly developing field of research with many suggestions for a design of nanoantennas, sensors and miniature metadevices. Despite many proposals for passive nanophotonic devices, the efficient coupling of light to nanoscale optical structures remains a major challenge. In this article, we propose a nanoscale laser based on a tightly confined anapole mode. By harnessing the non-radiating nature of the anapole state, we show how to engineer nanolasers based on InGaAs nanodisks as on-chip sources with unique optical properties...
May 31, 2017: Nature Communications
https://www.readbyqxmd.com/read/28560702/hybrid-intracerebral-probe-with-integrated-bare-led-chips-for-optogenetic-studies
#11
Suleman Ayub, Luc J Gentet, Richárd Fiáth, Michael Schwaerzle, Mélodie Borel, François David, Péter Barthó, István Ulbert, Oliver Paul, Patrick Ruther
This article reports on the development, i.e., the design, fabrication, and validation of an implantable optical neural probes designed for in vivo experiments relying on optogenetics. The probes comprise an array of ten bare light-emitting diode (LED) chips emitting at a wavelength of 460 nm and integrated along a flexible polyimide-based substrate stiffened using a micromachined ladder-like silicon structure. The resulting mechanical stiffness of the slender, 250-μm-wide, 65-μm-thick, and 5- and 8-mm-long probe shank facilitates its implantation into neural tissue...
September 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28557539/construction-and-temporal-behaviour-study-of-multi-rlc-intense-light-pulses-for-dermatological-applications
#12
Walid K Hamoudi, Raid A Ismail, Hussein A Shakir
Driving a flash lamp in an intense pulsed light system requires a high-voltage DC power supply, capacitive energy storage and a flash lamp triggering unit. Single, double, triple and quadruple-mesh discharge and triggering circuits were constructed to provide intense light pulses of variable energy and time durations. The system was treated as [Formula: see text] circuit in some cases and [Formula: see text] circuit in others with a light pulse profile following the temporal behaviour of the exciting current pulse...
May 30, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28551226/effect-of-pulsed-light-on-activity-and-structural-changes-of-horseradish-peroxidase
#13
Bei Wang, Yanyan Zhang, Chandrasekar Venkitasamy, Bengang Wu, Zhongli Pan, Haile Ma
The objective of this research was to investigate the effects of pulsed light on the activity and structure of horseradish peroxidase in buffer solution. Enzyme residual activities were measured. Surface topography, secondary, and tertiary structures of horseradish peroxidase were determined using atomic force microscopy (AFM), Raman spectroscopy, and fluorescence spectroscopy, respectively. Results showed that a complete inactivation of horseradish peroxidase was achieved by application of 10 pulses of pulsed light treatment at an intensity of 500J/pulse...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28529420/long-pulsed-nd-yag-laser-and-intense-pulse-light-755-nm-for-idiopathic-facial-hirsutism-a-comparative-study
#14
Arpit Shrimal, Souvik Sardar, Soumyajit Roychoudhury, Somenath Sarkar
BACKGROUND: Hirsutism means excessive terminal hair growth in a female in male pattern distribution. Perception of hirsutism is subjective. Permanent laser hair reduction is a slow process taking many sessions and tracking of improvement parameters is tedious. Hence, a lot of confusion still exists regarding the type of laser most beneficial for treatment. AIM: The aim of this study was to compare the effectiveness and safety profile of long-pulsed Nd: YAG laser (1064 nm) and intense pulse light (IPL)-755 nm in management of idiopathic facial hirsutism...
January 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28528603/a-retrospective-study-of-multiple-sequential-light-and-laser-sources-to-activate-aminolevulinic-acid-in-the-treatment-of-acne-vulgaris
#15
Daniel P Friedmann, Mitchel P Goldman, Sabrina G Fabi, Isabella Guiha
Reports of the sequential use of multiple light and laser sources for topical 5-aminolevulinic acid (ALA) activation in photodynamic therapy (PDT) of inflammatory acne vulgaris are lacking. The authors sought to retrospectively compare field-directed ALA-PDT with blue light only, blue light + pulsed dye laser (PDL), blue light + intense pulsed light (IPL), blue light + PDL + IPL, or blue light + red light + PDL + IPL for inflammatory acne of the face or upper trunk. Results showed a trend toward greater patient-reported improvement with comparable tolerability using multiple, sequential light sources in ALA-PDT for acne vulgaris, albeit not statistically significant...
2017: Skinmed
https://www.readbyqxmd.com/read/28526480/human-seasonal-and-circadian-studies-in-antarctica-halley-75-0-s
#16
Josephine Arendt, Benita Middleton
Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75(0)S, the sun does not rise for 110 d in the winter and does not set for 100 d in summer. Photoperiod is the major time cue governing the timing of seasonal events such as reproduction in many species. The neuroendocrine signal providing photoperiodic information to body physiology is the duration of melatonin secretion which reflects the length of the night: longer in the short days of winter and shorter in summer...
May 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28522530/high-harmonic-generation-in-graphene-enhanced-by-elliptically-polarized-light-excitation
#17
Naotaka Yoshikawa, Tomohiro Tamaya, Koichiro Tanaka
The electronic properties of graphene can give rise to a range of nonlinear optical responses. One of the most desirable nonlinear optical processes is high-harmonic generation (HHG) originating from coherent electron motion induced by an intense light field. Here, we report on the observation of up to ninth-order harmonics in graphene excited by mid-infrared laser pulses at room temperature. The HHG in graphene is enhanced by an elliptically polarized laser excitation, and the resultant harmonic radiation has a particular polarization...
May 19, 2017: Science
https://www.readbyqxmd.com/read/28512572/experimental-strategies-for-imaging-bioparticles-with-femtosecond-hard-x-ray-pulses
#18
Benedikt J Daurer, Kenta Okamoto, Johan Bielecki, Filipe R N C Maia, Kerstin Mühlig, M Marvin Seibert, Max F Hantke, Carl Nettelblad, W Henry Benner, Martin Svenda, Nicuşor Tîmneanu, Tomas Ekeberg, N Duane Loh, Alberto Pietrini, Alessandro Zani, Asawari D Rath, Daniel Westphal, Richard A Kirian, Salah Awel, Max O Wiedorn, Gijs van der Schot, Gunilla H Carlsson, Dirk Hasse, Jonas A Sellberg, Anton Barty, Jakob Andreasson, Sébastien Boutet, Garth Williams, Jason Koglin, Inger Andersson, Janos Hajdu, Daniel S D Larsson
This study explores the capabilities of the Coherent X-ray Imaging Instrument at the Linac Coherent Light Source to image small biological samples. The weak signal from small samples puts a significant demand on the experiment. Aerosolized Omono River virus particles of ∼40 nm in diameter were injected into the submicrometre X-ray focus at a reduced pressure. Diffraction patterns were recorded on two area detectors. The statistical nature of the measurements from many individual particles provided information about the intensity profile of the X-ray beam, phase variations in the wavefront and the size distribution of the injected particles...
May 1, 2017: IUCrJ
https://www.readbyqxmd.com/read/28504758/pulse-picker-for-synchrotron-radiation-driven-by-a-surface-acoustic-wave
#19
Simone Vadilonga, Ivo Zizak, Dmitry Roshchupkin, Andrei Petsiuk, Igor Dolbnya, Kawal Sawhney, Alexei Erko
A functional test for a pulse picker for synchrotron radiation was performed at Diamond Light Source. The purpose of a pulse picker is to select which pulse from the synchrotron hybrid-mode bunch pattern reaches the experiment. In the present work, the Bragg reflection on a Si/B<sub>4</sub>C multilayer was modified using surface acoustic wave (SAW) trains. Diffraction on the SAW alters the direction of the x rays and it can be used to modulate the intensity of the x rays that reach the experimental chamber...
May 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28497192/redox-changes-of-ferredoxin-p700-and-plastocyanin-measured-simultaneously-in-intact-leaves
#20
Ulrich Schreiber
Properties and performance of the recently introduced Dual/KLAS-NIR spectrophotometer for simultaneous measurements of ferredoxin (Fd), P700, and plastocyanin (PC) redox changes, together with whole leaf chlorophyll a (Chl) fluorescence (emission >760, 540 nm excitation) are outlined. Spectral information on in vivo Fd, P700, and PC in the near-infrared region (NIR, 780-1000 nm) is presented, on which the new approach is based. Examples of application focus on dark-light and light-dark transitions, where maximal redox changes of Fd occur...
May 11, 2017: Photosynthesis Research
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