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fractional laser

Jiasi Luo, Songquan Wu, Yanjin Lu, Sai Guo, Yang Yang, Chaoqian Zhao, Junjie Lin, Tingting Huang, Jinxin Lin
Microstructure, tribological property and corrosion resistance of orthopedic implant materials CoCrW-3 wt.% Cu fabricated by selective laser melting (SLM) process were systematically investigated with CoCrW as control. Equaxied γ-phase together with the inside {111} < 112 > type twin and platelet ε-phase was found in both the Cu-bearing and Cu-free alloys. Compared to the Cu-free alloy, the introduction of 3 wt.% Cu significantly increased the volume fraction of the ε-phase. In both alloys, the hardness of ε-phase zone was rather higher (~4 times) than that of γ-phase zone...
March 19, 2018: Journal of Materials Science. Materials in Medicine
Paolo Giuseppe Limoli, Enzo Maria Vingolo, Celeste Limoli, Sergio Zaccaria Scalinci, Marcella Nebbioso
This study is aimed at examining whether a suprachoroidal graft of autologous cells can improve best corrected visual acuity (BCVA) and responses to microperimetry (MY) in eyes affected by dry Age-related Macular Degeneration (AMD) over time through the production and secretion of growth factors (GFs) on surrounding tissue. Patients were randomly assigned to each study group. All patients were diagnosed with dry AMD and with BCVA equal to or greater than 1 logarithm of the minimum angle of resolution (logMAR)...
February 12, 2018: Journal of Visualized Experiments: JoVE
Justin Weinberg, Shaojie Zhang, Gillian Crews, Giorgio Carta, Todd Przybycien
Chemical modification of Protein A (ProA) chromatography ligands with polyethylene glycol (PEGylation) has been proposed as a strategy to increase the process selectivity and resin robustness by providing the ligand with a steric repulsion barrier against non-specific binding. This article comprises a comprehensive study of IgG adsorption and transport in Repligen CaptivA PriMAB resin with PEGylated ProA ligands that are modified using 5.2 and 21.5 kDa PEG chains. We studied the impact of the molecular weight of the PEG as well as the extent of PEGylation for the 5...
March 9, 2018: Journal of Chromatography. A
Won Seon Koh, Jeong Eun Kim, Young Suck Ro, Joo Yeon Ko
BACKGROUND: Despite various treatments attempts, no prospective studies have compared the different therapeutic modalities for treatment of idiopathic guttate hypomelanosis (IGH). This study aimed to compare the efficacy of CO2 fractional laser (CO₂FL), Er:YAG fractional laser (EYFL), and 0.025% topical tretinoin for treating IGH. MATERIALS AND METHODS: A total of 122 lesions were analyzed from 18 patients (mean age, 70.00 ± 20.00 years). Treatment outcome evaluations included the visual analog scale (VAS) to assess lesion severity, investigator's global assessment (IGA) to assess the extent of improvement, and patient's satisfaction score (PSS)...
March 16, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
Cary Presser, Ashot Nazarian, Amit Millo
Thermochemical characteristics were determined for several National Institute of Standards and Technology standard-reference-material petroleum and biodiesel fuels, using a novel laser-heating calorimetry technique. Measurements focused on the sample thermal behavior, specific heat release rate, and total specific heat release. The experimental apparatus consists of a copper sphere-shaped reactor mounted within a chamber, along with laser-beam-steering optical components, gas-supply manifold, and a computer-controlled data-acquisition system...
February 2018: Fuel
Yan Qu, Ying Wang, Yan Zhang, Chunyu Han, Dong Gao, Waishu Jin, Jinning Liang, Xiujuan Xia
BACKGROUND: Because of long-term exposure of skin, skin aging is an unavoidable natural law with age. Traditional Vitamin A and novel ablative fractional laser technique both have the effects of skin rejuvenation, and studies have demonstrated both of them have apparent clinical efficacy and histology-improving effects on photo-aging skin. MATERIALS AND METHODS: 45 female healthy Wistar rats were selected and the depilation areas of every rat were divided into four regions: control region(Region A), Vitamin A acid region(Region B), combination treatment region(Region C), and fractional laser region(Region D)...
March 15, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
Dominique Laniel, Gunnar Weck, Gabriel Gaiffe, Gaston Garbarino, Paul Loubeyre
Polynitrogen compounds have been actively pursued driven by their potential as ultra-high performing propellants or explosives. Despite remarkable breakthroughs over the past two decades, the two figures of merit for a compelling material, namely a large fraction of nitrogen by weight and a bulk stability at ambient conditions, have not been achieved yet. Here, we report the synthesis of a lithium pentazolate solid by compressing and laser-heating lithium embedded in molecular N2 around 45 GPa along with its recovery at ambient conditions...
March 13, 2018: Journal of Physical Chemistry Letters
Asaad A Khan, George D Dangas
Several chronic total occlusions (CTOs) may be undilatable despite successful wire passage; several techniques can be used for lesion preparation, such as high-pressure balloon inflations, rotational atherectomy laser, cutting balloon, and scoring balloons. Presence of moderate to severe calcification and lesion length over 40 mm in association with comorbidities, such as diabetes mellitus and reduced ejection fraction, may contribute to making a CTO lesion undilatable. Still, appropriate therapy selection for a patient with CTO should be individualized and procedure safety attended to...
March 1, 2018: Catheterization and Cardiovascular Interventions
Michael Gold, Anneke Andriessen, Alexandros Bader, Red Alinsod, Elizabeth Shane French, Nathan Guerette, Yegor Kolodchenko, Michael Krychman, Susan Murrmann, Julene Samuels
INTRODUCTION: The use of energy-based devices for the treatment of vaginal laxity, orgasmic dysfunction, and stress incontinence, such as minimally ablative fractional laser and radiofrequency, is gaining momentum. This review aims to answer clinical questions on the application of energy-based devices for feminine genital rejuvenation. METHODS: The target group includes physicians involved in esthetic medicine and feminine genital rejuvenation. A literature review was conducted on technologies in use for feminine rejuvenation to explore their safety, efficacy, tolerability, patient satisfaction, and clinical usability...
March 10, 2018: Journal of Cosmetic Dermatology
Paul J Hadwin, Timothy A Sipkens, Kevin A Thomson, Fengshan Liu, Kyle J Daun
Time-resolved laser-induced incandescence (TiRe-LII) data can be used to infer spatially and temporally resolved volume fractions and primary particle size distributions of soot-laden aerosols, but these estimates are corrupted by measurement noise as well as uncertainties in the spectroscopic and heat transfer submodels used to interpret the data. Estimates of the temperature, concentration, and size distribution of soot primary particles within a sample aerosol are typically made by nonlinear regression of modeled spectral incandescence decay, or effective temperature decay, to experimental data...
March 1, 2018: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
Fabian Sieland, Jenny Schneider, Detlef W Bahnemann
The effects of the particle size distribution on the charge carrier dynamics and the photocatalytic activity of mixed titanium dioxide (TiO2 ) powder samples were investigated in this work. Instead of the synthesis of the small semiconductor particles, the binary particle size distributions of the powders were obtained by mixing commercially available TiO2 powders with different particle sizes. The pure anatase samples (average diameters: 7, 20, and 125 nm, respectively) were created via ultrasound treatment and discreet drying...
March 8, 2018: Physical Chemistry Chemical Physics: PCCP
Yu-Cheng Chen, Qiushu Chen, Xiaoqin Wu, Xiaotian Tan, Juanhong Wang, Xudong Fan
Laser emission-based detection and imaging technology has attracted significant interest in biomedical research due to its high sensitivity, narrow linewidth, and superior spectral and spatial resolution. Recent advances have further revealed the potential to use laser emission to investigate chromatin dynamics, as well as to diagnose cancer tissues based on nuclear biomarkers. To move the laser emission based detection technology a step further towards practical use, in this work, we developed a highly robust tissue laser platform by microfabricating an SU8 spacer with a fixed height on the top mirror of the Fabry-Pérot (FP) cavity, which allows generation of reproducible and stable lasing results regardless of tissue thickness...
March 7, 2018: Lab on a Chip
Fei Liu, David Z Zhang, Peng Zhang, Miao Zhao, Salman Jafar
Developments in selective laser melting (SLM) have enabled the fabrication of periodic cellular lattice structures characterized by suitable properties matching the bone tissue well and by fluid permeability from interconnected structures. These multifunctional performances are significantly affected by cell topology and constitutive properties of applied materials. In this respect, a diamond unit cell was designed in particular volume fractions corresponding to the host bone tissue and optimized with a smooth surface at nodes leading to fewer stress concentrations...
March 3, 2018: Materials
Yanjin Lu, Ling Ren, Xiongcheng Xu, Yang Yang, Songquan Wu, Jiasi Luo, Mingyu Yang, Lingling Liu, Danhong Zhuang, Ke Yang, Jinxin Lin
In the study, CoCrWCu alloys with differing Cu content (2, 3, 4 wt%) were prepared by selective laser melting using mixture powders consisting of CoCrW and Cu, aiming at investigating the effect of Cu on the microstructures, mechanical properties, corrosion behavior and cytotoxicity. The SEM observations indicated that the Cu content up to 3 wt% caused the Si-rich precipitates to segregate along grain boundaries and in the grains, and EBSD analysis suggested that the Cu addition decreased the recrystallization degree and increased the grain diameter and fraction of big grains...
February 23, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Xue-Ling Mei, Li Wang
Intense pulsed light (IPL) is effective for the treatment of lentigines, telangiectasia, and generalized erythema, but is less effective in the removal of skin wrinkles. Fractional laser is effective on skin wrinkles and textural irregularities, but can induce postinflammatory hyperpigmentation (PIH), especially in Asians. This study evaluated the safety and efficacy of ablative fractional laser (AFL) in combination with IPL in the treatment of photoaging skin in Asians.This study included 28 Chinese women with Fitzpatrick skin type III and IV...
January 2018: Medicine (Baltimore)
Som N Khanal, John A Lucey
We investigated the effect of fermenting milk with 2 strains (DGCC7785 and St-143) of Streptococcus thermophilus, which are known to produce different types of exopolysaccharide (EPS) structures. The yields and physical properties of these ropy EPS were monitored during the fermentation of milk at different temperatures. We wanted to understand how these types of EPS properties affected yogurt gelation. Reconstituted skim milk was fermented at 33, 39, or 45°C until pH values reached 5.2, 4.9, 4.7, and 4.5...
February 28, 2018: Journal of Dairy Science
C Koral, M Dell'Aglio, R Gaudiuso, R Alrifai, M Torelli, A De Giacomo
In this paper, Nanoparticle-Enhanced Laser Induced Breakdown Spectroscopy is applied to transparent samples and gemstones with the aim to overcome the laser induced damage on the sample. We propose to deposit a layer of AuNPs on the sample surface by drying a colloidal solution before ablating the sample with a 532 nm pulsed laser beam. This procedure ensures that the most significant fraction of the beam, being in resonance with the AuNP surface plasmon, is mainly absorbed by the NP layer, which in turn results the breakdown to be induced on NPs rather than on the sample itself...
May 15, 2018: Talanta
H Matsuura, Y Nagasaka
We describe an instrument for the measurement of the Soret and thermodiffusion coefficients in ternary systems based on the transient holographic grating technique, which is called Soret forced Rayleigh scattering (SFRS) or thermal diffusion forced Rayleigh scattering (TDFRS). We integrated the SFRS technique and the two-wavelength detection technique, which enabled us to obtain two different signals to determine the two independent Soret coefficients and thermodiffusion coefficients in ternary systems. The instrument has been designed to read the mass transport simultaneously by two-wavelength lasers with wavelengths of λ = 403 nm and λ = 639 nm...
February 2018: Review of Scientific Instruments
Angelamaria Becorpi, Giuseppina Campisciano, Nunzia Zanotta, Zelinda Tredici, Secondo Guaschino, Felice Petraglia, Annalisa Pieralli, Giovanni Sisti, Francesco De Seta, Manola Comar
The composition of vaginal microbiome in menopause and cancer survivor women changes dramatically leading to genitourinary syndrome of menopause (GSM) in up to 7% of patients. Recent reports suggest that laser therapy may be valuable as a not hormonal therapeutic modality. The aim of the present study was to evaluate the effects of fractional CO2 laser treatment on the vaginal secretory pathway of a large panel of immune mediators, usually implicated in tissue remodeling and inflammation, and on microbiome composition in postmenopausal breast cancer survivors...
March 1, 2018: Lasers in Medical Science
Venkataram Mysore, Omprakash H Mahadevappa, Shyamanta Barua, Imran Majid, Vishalakshi Viswanath, Ramesh M Bhat, Suresh Talwar, Salim Thurakkal, Sanjeev J Aurangabadkar, Manas Chatterjee, Anil Ganjoo
Background: Currently, the standard protocol regarding the performance of procedures on patients receiving or having recently received isotretinoin (13- cis -retinoic acid) states that the procedures should not be performed. The recommendations in standard books and drug insert require discontinuation of isotretinoin for 6 months before performing cosmetic procedures, including waxing, dermabrasion, chemical peels, laser procedures, or incisional and excisional cold-steel surgery. These recommendations have been followed for over two decades despite little evidence for the stated increased risk of scarring...
October 2017: Journal of Cutaneous and Aesthetic Surgery
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