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https://www.readbyqxmd.com/read/28430259/impact-of-assisting-atmospheric-pressure-plasma-on-the-formation-of-micro-and-nanoparticles-during-picosecond-laser-ablation-of-titanium
#1
Stefan Grottker, Wolfgang Viöl, Christoph Gerhard
In this work, we investigated the generation of particles during pure laser and plasma-assisted laser ablation of titanium. Experiments were performed using a NIR picosecond laser at a wavelength of 1030 nm and a pulse duration of 8 ps. For plasma-assisted ablation, an atmospheric pressure dielectric barrier discharge plasma was applied where the process gas was argon. Quantitative particle distributions at sizes from 10 nm to 10 μm were determined. In addition, we evaluated the amount of ablated material via laser scanning microscopy...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28426270/the-successful-treatment-of-primary-cutaneous-localized-amyloidosis-with-a-combined-therapy-of-ablative-fractionated-co2-laser%C3%AF-topical-retinoid-corticosteroids-and-levovitamin-c-five-cases-with-a-two-year-follow-up
#2
Yao-Jia Luo, Xing-Hua Gao, Hong-Duo Chen, Yuan-Hong Li
No abstract text is available yet for this article.
April 20, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28423462/geochemical-signatures-of-benthic-foraminiferal-shells-from-a-heat-polluted-shallow-marine-environment-provide-field-evidence-for-growth-and-calcification-under-extreme-warmth
#3
Danna Titelboim, Aleksey Sadekov, Ahuva Almogi-Labin, Barak Herut, Michal Kucera, Christiane Schmidt, Orit Hyams-Kaphzan, Sigal Abramovich
Shallow marine calcifiers play an important role as marine ecosystem engineers and in the global carbon cycle. Understanding their response to warming is essential to evaluate the fate of marine ecosystems under global change scenarios. A rare opportunity to test the effect of warming acting on natural ecosystems is by investigation of heat-polluted areas. Here we study growth and calcification in benthic foraminifera that inhabit a thermally polluted coastal area in Israel, where they are exposed to elevated temperatures reaching up to ~42°C in summer...
April 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28421751/formation-and-characterization-of-homoleptic-thorium-isocyanide-complexes
#4
Xiuting Chen, Qingnuan Li, Yu Gong, Lester Andrews, Benjamin K Liebov, Zongtang Fang, David A Dixon
Homoleptic thorium isocyanide complexes have been prepared via the reactions of laser-ablated thorium atoms and (CN)2 in a cryogenic matrix, and the structures of the products were characterized by infrared spectroscopy and theoretical calculations. Thorium atoms reacted with (CN)2 under UV irradiation to form the oxidative addition product Th(NC)2, which was calculated to have closed-shell singlet ground state with a bent geometry. Further reaction of Th(NC)2 and (CN)2 resulted in the formation of Th(NC)4, a molecule with a tetrahedral geometry...
April 19, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28419284/laser-thermal-ablation-for-metastases-failing-radiosurgery-a-multicentered-retrospective-study
#5
Tafadzwa L Chaunzwa, Di Deng, Eric C Leuthardt, Stephen B Tatter, Alireda M Mohammadi, Gene H Barnett, Veronica L Chiang
BACKGROUND: Radiosurgical failure following stereotactic radiosurgery for brain metastases can be attributed to tumor regrowth or radiation necrosis. MRI-guided laser thermal ablation (LTA) therapy has emerged as an option for treatment; however, previous literature demonstrates variable results across centers. OBJECTIVE: To assess the outcomes of LTA in the treatment of metastases failing radiosurgery across multiple centers and to determine if any treatment factors are predictive of outcome...
April 13, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28415208/x-ray-shadow-imprint-of-hydrodynamic-instabilities-on-the-surface-of-inertial-confinement-fusion-capsules-by-the-fuel-fill-tube
#6
A G MacPhee, D T Casey, D S Clark, S Felker, J E Field, S W Haan, B A Hammel, J Kroll, O L Landen, D A Martinez, P Michel, J Milovich, A Moore, A Nikroo, N Rice, H F Robey, V A Smalyuk, M Stadermann, C R Weber
Measurements of hydrodynamic instability growth for a high-density carbon ablator for indirectly driven inertial confinement fusion implosions on the National Ignition Facility are reported. We observe significant unexpected features on the capsule surface created by shadows of the capsule fill tube, as illuminated by laser-irradiated x-ray spots on the hohlraum wall. These shadows increase the spatial size and shape of the fill tube perturbation in a way that can significantly degrade performance in layered implosions compared to previous expectations...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28415147/neurosurgical-laser-ablation-and-mr-thermometry-risks-of-multisite-workflow-pattern
#7
Paul S Larson, Sudhakar Vadivelu, Hooman Azmi-Ghadimi, Amy Nichols, Loretta Fauerbach, Helen Boehm Johnson
Neurosurgical laser ablation is a relatively new but rapidly growing application of stereotactic neurosurgery that allows neurosurgeons to treat many previously untreatable conditions with the added benefit of shorter hospitalizations and recovery times. The vast majority of these procedures, however, are performed using a multisite workflow pattern involving transport of the patient between the operating room (OR), the computed tomography (CT) suite, and the magnetic resonance imaging (MRI) suite, often necessitating patient transfer through public pathways and requiring multiple trips if laser fiber placement is not accurate...
April 2017: Journal of Healthcare Risk Management: the Journal of the American Society for Healthcare Risk Management
https://www.readbyqxmd.com/read/28414343/effect-of-hydrocarbon-molecular-decomposition-on-palladium-assisted-laser-induced-plasma-ablation
#8
Alireza Moosakhani, Parviz Parvin, Seyedeh Zahra Mortazavi, Ali Reyhani, Shariar Abachi
The Q-switched Nd:YAG laser is focused on a palladium target in the control chamber filled with various hydrocarbon atmospheres (C1-C4) to investigate their effect on the palladium ablated mass, gas reaction products, and corresponding plasma parameters (such as electron density N<sub>e</sub> and plasma temperature T<sub>e</sub>) during molecular decomposition. The plasma parameters arise mainly from the Pd nanocatalytic activity during the laser-induced plasma process. We compare synthetic air atmosphere to hydrocarbon media to understand how the latter generates excess heat via oxygen-free exothermic (recombination) reactions...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28411700/association-between-antithrombotic-therapy-and-risk-of-postoperative-complications-among-patients-undergoing-endovenous-laser-ablation
#9
Kodai Takahashi, Hideto Ito, Toshio Katsube, Masatoshi Hashimoto, Kazuhito Mita, Hideki Asakawa, Takashi Hayashi, Keiichi Fujino
BACKGROUND: The aim of the study was to evaluate the clinical results and postoperative complications, especially recanalization or bleeding complications, in patients with saphenous varicose veins undergoing endovenous laser ablation (EVLA) while receiving antithrombotic therapy (ATT). METHODS: This retrospective cohort study included 1136 Japanese patients undergoing EVLA with a 980-nm diode laser between January 2012 and November 2015 at our institution. The patients were divided into two groups: ATT users (ATT group) and nonusers (control group)...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28411699/outcomes-of-a-single-center-experience-with-classification-and-treatment-of-endothermal-heat-induced-thrombosis-after-endovenous-ablation
#10
Lindsey M Korepta, Jennifer J Watson, M Ashraf Mansour, Christopher M Chambers, Robert F Cuff, Jason D Slaikeu, Peter Y Wong
OBJECTIVE: Endothermal heat-induced thrombosis (EHIT) is a known complication of endothermal venous ablation procedures. EHIT can lead to deep vein thrombosis/pulmonary embolism, which cause significant disability and, rarely, death. Other studies have evaluated risk factors for EHIT. There is an accepted grading system for EHIT, but there is no consensus on treatment type, duration, or follow-up. We retrospectively evaluated all cases of EHIT after radiofrequency ablation or endovenous laser ablation at our institution during a 7-year period, focusing on classification, treatment, and outcomes of EHIT...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28411696/first-10-month-results-of-the-vascular-quality-initiative-varicose-vein-registry
#11
Andrea T Obi, Danielle C Sutzko, Jose I Almeida, Lowell Kabnick, Jack L Cronenwett, Nicholas H Osborne, Brajesh K Lal, Thomas W Wakefield
OBJECTIVE: The Vascular Quality Initiative Varicose Vein Registry (VQI VVR) represents a new Patient Safety Organization database launched in January 2015 as a collaborative effort between the American Venous Forum and the Society for Vascular Surgery. This study was undertaken to identify real-world trends among treatment choices and outcomes of varicose vein patients. METHODS: Registry data prospectively captured anatomic, procedural, and outcome data for patients with C2 or more severe disease undergoing intervention for venous varicosities from January to November 2015...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28411450/activatable-near-infrared-dye-conjugated-hyaluronic-acid-based-nanoparticles-as-a-targeted-theranostic-agent-for-enhanced-fluorescence-ct-photoacoustic-imaging-guided-photothermal-therapy
#12
Xiaolong Liang, Lei Fang, Xiaoda Li, Xu Zhang, Fan Wang
Targeted theranostic nano-system integrating functions of both diagnosis and therapy shows great potential for improving diagnosis and therapeutic efficacy. Herein, multifunctional nanoparticle based on activatable hyaluronic acid (HA) conjugating two near-infrared (NIR) dyes of Cy5.5 and IR825 was successfully designed and fabricated, and simultaneously used as a carrier for encapsulating perfluorooctylbromide (PFOB). In this system, PFOB showed good capability to absorb the X-rays, Cy5.5 on the outer surface acted as a fluorescent dye activatable by hyaluronidases (Hyals) in the tumor, and IR825 in the core as a photothermal agent...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28408089/mid-term-outcomes-of-endovenous-laser-ablation-in-patients-with-active-and-healed-venous-ulcers-a-follow-up-study
#13
H Sinabulya, R Östmyren, L Blomgren
OBJECTIVES: The aim of this study was to assess the mid-term ulcer recurrence rate in patients with healed or active venous ulcers treated with endovenous laser ablation (EVLA) for incompetent superficial axial veins and to search for possible risk factors for non-healing and recurrence. METHODS: Consecutive patients treated with EVLA because of a healed or active venous ulcer between 2006 and 2013 were identified in the medical records and quality registry and invited to follow-up, including clinical history, study examination, Duplex ultrasound scanning, ankle brachial pressure, photoplethysmography, venous clinical severity score (VCSS), and health related quality of life (HRQoL) measured with EQ5D...
April 10, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28405187/identification-of-cerebral-metal-ion-imbalance-in-the-brain-of-aging-octodon-degus
#14
Nady Braidy, Anne Poljak, Chris Marjo, Helen Rutlidge, Anne Rich, Bat-Erdene Jugder, Tharusha Jayasena, Nibaldo C Inestrosa, Perminder S Sachdev
The accumulation of redox-active transition metals in the brain and metal dyshomeostasis are thought to be associated with the etiology and pathogenesis of several neurodegenerative diseases, and Alzheimer's disease (AD) in particular. As well, distinct biometal imaging and role of metal uptake transporters are central to understanding AD pathogenesis and aging but remain elusive, due inappropriate detection methods. We therefore hypothesized that Octodon degus develop neuropathological abnormalities in the distribution of redox active biometals, and this effect may be due to alterations in the expression of lysosomal protein, major Fe/Cu transporters, and selected Zn transporters (ZnTs and ZIPs)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28404522/observations-on-the-relationship-between-anisometropia-amblyopia-and-strabismus
#15
Earl L Smith, Li-Fang Hung, Baskar Arumugam, Janice M Wensveen, Yuzo M Chino, Ronald S Harwerth
We investigated the potential causal relationships between anisometropia, amblyopia and strabismus, specifically to determine whether either amblyopia or strabismus interfered with emmetropization. We analyzed data from non-human primates that were relevant to the co-existence of anisometropia, amblyopia and strabismus in children. We relied on interocular comparisons of spatial vision and refractive development in animals reared with 1) monocular form deprivation; 2) anisometropia optically imposed by either contact lenses or spectacle lenses; 3) organic amblyopia produced by laser ablation of the fovea; and 4) strabismus that was either optically imposed with prisms or produced by either surgical or pharmacological manipulation of the extraocular muscles...
April 18, 2017: Vision Research
https://www.readbyqxmd.com/read/28403975/-fetoscopic-laser-coagulation-in-200%C3%A2-consecutive-monochorionic-pregnancies-with-twin-twin-transfusion-syndrome
#16
L Lecointre, N Sananès, A S Weingertner, A Gaudineau, C Akladios, V Cavillon, B Langer, R Favre
OBJECTIVES: To report preoperative data, surgical characteristics, complications and perinatal outcome of twin-twin transfusion syndrome (TTTS) managed with laser ablation surgery, to analyze predictors of neonatal survival and to compare the 100 most recent cases with the older 100. MATERIALS AND METHODS: Observational cohort moncentric study of 200 cases of TTTS consecutively treated with fetoscopic laser coagulation between January 2004 and December 2014...
February 2017: J Gynecol Obstet Hum Reprod
https://www.readbyqxmd.com/read/28403523/autologous-cell-suspension-grafting-in-segmental-vitiligo-and-piebaldism-a-randomised-controlled-trial-comparing-full-surface-and-fractional-co2-laser-recipient-site-preparations
#17
J E Lommerts, A A Meesters, L Komen, M W Bekkenk, M A de Rie, R M Luiten, A Wolkerstorfer
BACKGROUND: Autologous non-cultured cell suspension transplantation is an effective treatment for repigmentation in segmental vitiligo and piebaldism. Full surface laser ablation is frequently used to prepare the recipient site before cell suspension transplantation, even though optimal laser settings and ablation depth are unknown. OBJECTIVES: To assess the efficacy and safety of less invasive recipient site preparations. METHODS: In a randomised, observer-blinded, controlled trial we compared different recipient site preparations before cell suspension transplantation in segmental vitiligo and piebaldism...
April 12, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28403265/improvement-of-atrophic-acne-scars-in-skin-of-color-using-topical-synthetic-epidermal-growth-factor-egf-serum-a-pilot-study
#18
Marie Alexia Stoddard, Jennifer Herrmann, Lauren Moy, Ronald Moy
<p>BACKGROUND: Atrophic scarring in skin of color is a common, permanent, and distressing result of uncontrolled acne vulgaris. Ablative lasers and chemical peels are frequently used to improve the appearance of atrophic scars, primarily through the stimulation of collagen and elastin; however, these treatment modalities are associated with risks, such as dyspigmentation and hypertrophic scarring, especially in patients with darker skin.</p> <p>OBJECTIVE: We evaluated the efficacy of topically applied synthetic epidermal growth factor (EGF) serum in reducing the appearance of atrophic acne scars in skin of color...
April 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28403099/us-guided-percutaneous-laser-ablation-of-refractory-metastatic-retroperitoneal-lesions-a-care-compliant-case-report
#19
Guo Tian, Tian'an Jiang
RATIONALE: Retroperitoneal metastatic lymph node is rare but severe, which has important structures like the gastrointestinal tract and large blood vessels around and may challenge excision, inducing serious complications like hemorrhage, intestinal adhesion, and even death after injury. PATIENT CONCERNS: We described the case of a 60-year-old man with a history of right liver resection in 2010, pulmonary wedge resection in 2012, and transarterial chemoembolization twice in 2014, in which the postoperative pathology suggested the mixed liver cancer, and poorly differentiated lung cancer from liver metastasis...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28401348/ultrapulsed-fractional-ablative-carbon-dioxide-laser-treatment-of-hypertrophic-burn-scars-evaluation-of-an-in-patient-controlled-standardized-treatment-approach
#20
Julian Poetschke, Ulf Dornseifer, Matteo Tretti Clementoni, Markus Reinholz, Hannah Schwaiger, Stephanie Steckmeier, Thomas Ruzicka, Gerd G Gauglitz
In this study, we aimed to quantify the effects of fractional ablative carbon dioxide laser therapy in the treatment of widespread hypertrophic burn scars. While many different pilot studies have described the potential of the technology and expert groups and current guidelines, alike, recommend its use, the level of evidence for the efficacy of fractional CO2-laser treatment for burn scars is currently very low. Ten patients (three male, seven female) with hypertrophic burn scars were treated with a single course of fractional CO2-laser therapy in an in-patient controlled setup, using a standardized treatment paradigm...
April 12, 2017: Lasers in Medical Science
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