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https://www.readbyqxmd.com/read/27911123/lichen-sclerosus-et-atrophicus-in-a-surgical-scar-treated-with-fractional-laser
#1
Marta Mendieta Eckert, Izaskun Ocerin Guerra, Nerea Landa Gundin
Lichen sclerosus et atrophicus (LSA) is a chronic inflammatory disease of unknown cause that typically affects the genital area(1). It has been reported in post-traumatic areas as a result of Koebner´s phenomenon. LSA responds poorly to treatment making it a therapeutic challenge(2). Laser therapy has been described for LSA with variable results(3,4).
December 2, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27910522/design-and-characterization-of-a-linear-hencken-type-burner
#2
M F Campbell, G A Bohlin, P E Schrader, R P Bambha, C J Kliewer, K O Johansson, H A Michelsen
We have designed and constructed a Hencken-type burner that produces a 38-mm-long linear laminar partially premixed co-flow diffusion flame. This burner was designed to produce a linear flame for studies of soot chemistry, combining the benefit of the conventional Hencken burner's laminar flames with the advantage of the slot burner's geometry for optical measurements requiring a long interaction distance. It is suitable for measurements using optical imaging diagnostics, line-of-sight optical techniques, or off-axis optical-scattering methods requiring either a long or short path length through the flame...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909442/strong-coupling-of-shoot-assimilation-and-soil-respiration-during-drought-and-recovery-periods-in-beech-as-indicated-by-natural-abundance-%C3%AE-13-c-measurements
#3
Carola H Blessing, Matti Barthel, Lydia Gentsch, Nina Buchmann
Drought down-regulates above- and belowground carbon fluxes, however, the resilience of trees to drought will also depend on the speed and magnitude of recovery of these above- and belowground fluxes after re-wetting. Carbon isotope composition of above- and belowground carbon fluxes at natural abundance provides a methodological approach to study the coupling between photosynthesis and soil respiration (SR) under conditions (such as drought) that influence photosynthetic carbon isotope discrimination. In turn, the direct supply of root respiration with recent photoassimilates will impact on the carbon isotope composition of soil-respired CO2...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27906375/surface-modulation-and-back-reflection-from-foil-targets-irradiated-by-a-petawatt-femtosecond-laser-pulse-at-oblique-incidence
#4
S Ter-Avetisyan, A Andreev, K Platonov, J H Sung, S K Lee, H W Lee, J Y Yoo, P K Singh, H Ahmed, C Scullion, K F Kakolee, T W Jeong, P Hadjisolomou, M Borghesi
A significant level of back reflected laser energy was measured during the interaction of ultra-short, high contrast PW laser pulses with solid targets at 30° incidence. 2D PIC simulations carried out for the experimental conditions show that at the laser-target interface a dynamic regular structure is generated during the interaction, which acts as a grating (quasi-grating) and reflects back a significant amount of incident laser energy. With increasing laser intensity above 10<sup>18</sup> W/cm<sup>2</sup> the back reflected fraction increases due to the growth of the surface modulation to larger amplitudes...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27904505/composition-and-biological-activities-of-the-aqueous-extracts-of-three-scleractinian-corals-from-the-mexican-caribbean-pseudodiploria-strigosa-porites-astreoides-and-siderastrea-siderea
#5
Alejandro García-Arredondo, Alejandra Rojas-Molina, César Ibarra-Alvarado, Fernando Lazcano-Pérez, Roberto Arreguín-Espinosa, Judith Sánchez-Rodríguez
BACKGROUND: Scleractinian corals (stony corals) are the most abundant reef-forming cnidarians found in coral reefs throughout the world. Despite their abundance and ecological importance, information about the diversity of their toxins and their biological activities is very scarce. In this study, the chemical composition and the biological activities of the aqueous extracts of Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea, three scleractinian corals from the Mexican Caribbean, have been assessed for the first time...
2016: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/27900835/treatment-of-cutaneous-larva-migrans-with-a-single-session-of-carbon-dioxide-laser-a-study-of-ten-cases-in-the-philippines
#6
Livia Francine Soriano, Miriam Emily Piansay-Soriano
BACKGROUND: Cutaneous larva migrans (CLM) has a detrimental effect on patients' emotional and physical quality of life. Due to local unavailability of gold standard oral treatments for CLM, carbon dioxide laser was attempted. We present a case series where a single session of carbon dioxide laser treatment was associated with cessation of signs and symptoms of CLM. AIMS: The aim of this study was to assess the efficacy of a single session of carbon dioxide laser in the treatment of CLM...
November 29, 2016: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/27896191/comparison-of-the-effectiveness-of-ablative-and-non-ablative-fractional-laser-treatments-for-early-stage-thyroidectomy-scars
#7
Jin-Uk Jang, Soo-Young Kim, Eul-Sik Yoon, Woo-Kyung Kim, Seung-Ha Park, Byung-Il Lee, Deok-Woo Kim
BACKGROUND: Open thyroidectomy is conventionally performed at the anterior side of neck, which is a body part with a comparatively great degree of open exposure; due to this, postoperative scarring may cause distress in patients. We aimed to compare the effects of ablative and nonablative fractional laser treatments on thyroidectomy scars. We examined medical records in a retrospective manner and analyzed scars based on their digital images by using the modified Manchester Scar Scale (mMSS)...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27896190/the-use-of-locally-applied-vibration-to-minimize-pain-during-fractional-co2-laser-therapy-in-living-liver-donor-scar-management
#8
Sinyoung Song, Dong Hoon Choi, Tae Suk Oh
BACKGROUND: Fractional CO2 laser is an effective treatment for scars, but most patients complain about sharp burning pain, even after the application of lidocaine ointment. This study analyzed the impact of a vibrating device to nonpharmacologically reduce the acute pain of laser treatment, in accordance with the gate control theory of pain management. METHODS: This is a prospective study performed from May 2013 through March 2014. Fifty-three patients (mean age, 26...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27888888/laser-assisted-delivery-to-treat-facial-scars
#9
REVIEW
Jill S Waibel, Ashley Rudnick
Treatment of facial scars is a multispecialty endeavor for optimal patient recovery. One new innovation helping in facial scar treatments are lasers. Fractional laser predictably (tunable) disrupts the barrier of the skin creating deep channels that allow the delivery of drug and cellular materials; this is called laser-assisted drug delivery (LAD). Without exception thus far, LAD has been found to enhance the local uptake of any drug or substance applied to the skin. These zones may be used postoperatively to deliver drugs and other substances to create an enhanced scar therapeutic response to drug or substance applied to the skin...
February 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/27885682/fractional-laser-assisted-drug-uptake-impact-of-time-related-topical-application-to-achieve-enhanced-delivery
#10
Christina A Banzhaf, Daniel Thaysen-Petersen, Christiane Bay, Peter A Philipsen, Mette Mogensen, Tarl Prow, Merete Haedersdal
BACKGROUND AND OBJECTIVE: Ablative fractional laser (AFXL) is acknowledged to increase uptake of topically applied agents in skin. AFXL channels gradually close over time, which may impair this capability. The time frame for applying a drug after AFXL exposure remains to be established. The aim of this study, was to investigate the importance of time-related topical application after AFXL exposure and to relate resultant uptake in skin with AFXL channel morphology and skin integrity. STUDY DESIGN/MATERIALS AND METHODS: Buttock skin of healthy volunteers (n = 11) was exposed to 10,600 nm fractional CO2 laser using 5% density, 120 μm beam diameter, 15 mJ pulse energy...
November 25, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27885522/efficacy-and-safety-of-fractional-co2-laser-versus-fractional-er-yag-laser-in-the-treatment-of-facial-skin-wrinkles
#11
Reza M Robati, Elmira Asadi
Ablative fractional lasers were introduced for treating facial rhytides. Few studies have compared fractional CO2 and Er:YAG lasers on cutaneous photodamages by a split trial. The aim of the present study was to compare these modalities in a randomized controlled double-blind split-face design with multiple sessions and larger sample size compared to previous studies done before. Forty patients with facial wrinkles were enrolled. Patients were randomly assigned to receive three monthly treatments on each side of the face, one with a fractional CO2 and one with a fractional Er:YAG laser...
November 24, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27885520/the-effect-of-pre-operative-topical-anaesthetic-cream-on-the-ablative-width-and-coagulative-depth-of-ablative-fractional-resurfacing-laser
#12
Preawphan Punyaratabandhu, Rungsima Wanitphakdeedecha, Penvadee Pattanaprichakul, Panitta Sitthinamsuwan, Weeranut Phothong, Sasima Eimpunth, Visnu Lohsiriwat, Woraphong Manuskiatti
Topical anaesthetic cream (TAC) is commonly used as a pre-treatment of ablative fractional resurfacing (AFR) laser. Most of anaesthetic cream contains distilled water as major component. Therefore, pre-operative TAC may interfere the photothermal reaction in the skin treated with fractional carbon-dioxide (FCO2) laser and fractional erbium-doped yttrium aluminium garnet (FEr:YAG) laser. The objective of the study was to compare the ablative width (AW) and coagulative depth (CD) of AFR laser with and without pre-treatment with TAC...
November 24, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27879638/structural-investigation-of-cell-wall-xylan-polysaccharides-from-the-leaves-of-algerian-argania-spinosa
#13
Kadda Hachem, Céline Faugeron, Meriem Kaid-Harche, Vincent Gloaguen
Xylan-type polysaccharides were isolated from the leaves of Argania spinosa (L.) Skeels collected in the Tindouf area (southwestern Algeria). Xylan fractions were obtained by sequential alkaline extractions and purified on Sepharose CL-4B. The xylan structure was investigated by enzymatic hydrolysis with an endo-β(1→4)-xylanase followed by chromatography of the resulting fragments on Biogel P2, characterization by sugar analysis and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS )...
November 21, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27877906/structural-behavior-of-laser-irradiated-%C3%AE-fe2o3-nanocrystals-dispersed-in-porous-silica-matrix-%C3%AE-fe2o3-to-%C3%AE-fe2o3-phase-transition-and-formation-of-%C3%AE%C2%B5-fe2o3
#14
Yassine El Mendili, Jean-François Bardeau, Nirina Randrianantoandro, Jean-Marc Greneche, Fabien Grasset
The effects of laser irradiation on γ-Fe2O3 4 ± 1 nm diameter maghemite nanocrystals synthesized by co-precipitation and dispersed into an amorphous silica matrix by sol-gel methods have been investigated as function of iron oxide mass fraction. The structural properties of γ-Fe2O3 phase were carefully examined by X-ray diffraction and transmission electron microscopy. It has been shown that γ-Fe2O3 nanocrystals are isolated from each other and uniformly dispersed in silica matrix. The phase stability of maghemite nanocrystals was examined in situ under laser irradiation by Raman spectroscopy and compared with that resulting from heat treatment by X-ray diffraction...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27871614/direct-lead-isotope-analysis-in-hg-rich-sulfides-by-la-mc-icp-ms-with-a-gas-exchange-device-and-matrix-matched-calibration
#15
Wen Zhang, Zhaochu Hu, Detlef Günther, Yongsheng Liu, Wenli Ling, Keqing Zong, Haihong Chen, Shan Gao
In situ Pb isotope data of sulfide samples measured by LA-MC-ICP-MS provide valuable geochemical information for studies of the origin and evolution of ore deposits. However, the severe isobaric interference of (204)Hg on (204)Pb and the lack of matrix-matched sulfide reference materials limit the precision of Pb isotopic analyses for Hg-rich sulfides. In this study, we observe that Hg forms vapor and can be completely removed from sample aerosol particles produced by laser ablation using a gas exchange device...
December 15, 2016: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27867427/practicalities-of-mapping-pm10-and-pm2-5-concentrations-on-city-wide-scales-using-a-portable-particulate-monitor
#16
Michael E Deary, Samantha J Bainbridge, Amy Kerr, Adam McAllister, Thomas Shrimpton
Fine particulate matter is considered to be the most significant ambient air pollutant in terms of potential health impacts. Therefore, it is important that regulators are able to accurately assess the exposure of populations to PM10 and PM2.5 across municipal areas. We report on the practicalities of using a laser light scattering portable particulate monitor (Turnkey Instruments DustMate), in combination with a GPS, to map PM10 and PM2.5 concentrations on city-wide scales in Newcastle upon Tyne/Gateshead (UK), during a series of walking surveys...
2016: Air Quality, Atmosphere, & Health
https://www.readbyqxmd.com/read/27866044/alternative-splicing-of-smpd1-coding-for-acid-sphingomyelinase-in-major-depression
#17
Cosima Rhein, Martin Reichel, Marcel Kramer, Andrea Rotter, Bernd Lenz, Christiane Mühle, Erich Gulbins, Johannes Kornhuber
BACKGROUND: Major depressive disorder (MDD) is a psychiatric disorder characterized by key symptoms that include depressed mood and a loss of interest and pleasure. A recently developed pathogenic model of MDD involves disturbed neurogenesis in the hippocampus, where the acid sphingomyelinase (ASM)/ceramide system plays an important role and is proposed as a molecular target for antidepressant action. Because alternative splicing of SMPD1 mRNA, coding for ASM, is relevant for the regulation of ASM enzymatic activity, we investigated the frequency of alternatively spliced ASM isoforms in peripheral blood cells of MDD patients versus healthy controls...
September 28, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27864031/fractional-co2-laser-treatment-of-the-vestibule-for-patients-with-vestibulodynia-and-genitourinary-syndrome-of-menopause-a-pilot-study
#18
Filippo Murina, Mickey Karram, Stefano Salvatore, Raffaele Felice
INTRODUCTION: Chronic vulvar pain and burning remains one of the most perplexing problems faced by practicing gynecologists. AIM: To evaluate the effectiveness and safety of the application of micro-ablative fractional CO2 laser to the vulvar vestibule in the management of patients with vulvar pain from vestibulodynia or genitourinary syndrome of menopause. METHODS: Patients (N = 70) underwent fractional micro-ablative CO2 laser treatment for vestibular pain plus vestibulodynia (n = 37) or genitourinary syndrome of menopause (n = 33)...
November 15, 2016: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/27862066/fractional-co2-laser-treatment-of-caesarean-section-scars-a-randomized-controlled-split-scar-trial-with-long-term-follow-up-assessment
#19
Katrine E Karmisholt, Elisabeth H Taudorf, Camilla B Wulff, Emily Wenande, Peter A Philipsen, Merete Haedersdal
BACKGROUND AND OBJECTIVES: Caesarean section (c-section) scars can be pose functional and cosmetic challenges and ablative fractional laser (AFXL) treatment may offer benefit to patients. We evaluated textural and color changes over time in AFXL-treated versus untreated control scars. MATERIALS AND METHODS: A randomized, controlled, intra-individual split-scar trial with three sessions of AFXL-treatments for mature c-section scars. Settings of AFXL were adjusted to each individual scar...
November 8, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27860428/assessing-the-intracellular-integrity-of-phosphine-stabilized-ultrasmall-cytotoxic-gold-nanoparticles-enabled-by-fluorescence-labeling
#20
Janine Broda, Andrea Küster, Stefan Westhues, Dirk Fahrenkamp, Andreas T J Vogg, Julia Steitz, Felix M Mottaghy, Gerhard Müller-Newen, Ulrich Simon
As the size of nanoparticles (NPs) is in the range of biological molecules and subcellular structures, they provide new perspectives in biomedicine. This work presents studies concerning the cellular uptake and distribution of phosphine-stabilized cytotoxic 1.4 nm sized AuNPs and their probable degradation during this process. Therefore, ultrasmall phosphine-stabilized AuNPs are modified by linking a fluorophore covalently to the ligand shell. Monitoring the fluorescence on a cellular level by means of flow cytometry and confocal laser scanning microscopy allows determining the fate of the ligand shell during AuNP cell internalization, due to the fact that the fluorescence of a fluorophore bound near to the AuNP surface is quenched...
November 18, 2016: Advanced Healthcare Materials
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