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https://www.readbyqxmd.com/read/29028863/the-future-of-non-invasive-rejuvenation-technology-devices
#1
Michael H Gold
<p>Non-invasive rejuvenation of the skin is performed regularly in many cosmetic offices. Using evidence-based medicine, we will review the various technologies being used for non-invasive rejuvenation. This includes the use of intense pulsed light (IPL), which has been thoroughly studied and shown to be quite useful for this type of rejuvenation in removing the red and brown pigments, as well as affecting collagen. Fractional lasers, both non-ablative and ablative in nature, also can show dramatic improvements in the skin and associated clinical studies are reviewed here...
June 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29028406/loading-of-mass-spectrometry-ion-trap-with-th-ions-by-laser-ablation-for-nuclear-frequency-standard-application
#2
Petr V Borisyuk, Sergey P Derevyashkin, Ksenia Y Khabarova, Nikolay N Kolachevsky, Yury Y Lebedinsky, Sergey S Poteshin, Alexey A Sysoev, Evgeny V Tkalya, Dmitry O Tregubov, Viktor I Troyan, Oleg S Vasiliev, Valery P Yakovlev, Valery I Yudin
We describe an original multisectional quadrupole ion trap aimed to realize nuclear frequency standard based on the unique isomer transition in thorium nucleus. It is shown that the system effectively operates on Th(+), Th(2+) and Th(3+) ions produced by laser ablation of metallic thorium-232 target. Laser intensity used for ablation is about 6 GW/cm(2). Via applying a bias potential to every control voltage including the RF one, we are able not only to manipulate ions within the energy range as wide as 1-500 eV but to specially adjust trap potentials in order to work mainly with ions that belong to energy distribution maximum and therefore to effectively enhance the number of trapped ions...
August 2017: European Journal of Mass Spectrometry
https://www.readbyqxmd.com/read/29027866/magnetic-resonance-imaging-guided-laser-interstitial-thermal-therapy-as-treatment-for-intractable-insular-epilepsy-in-children
#3
M Scott Perry, David J Donahue, Saleem I Malik, Cynthia G Keator, Angel Hernandez, Rohit K Reddy, Freedom F Perkins, Mark R Lee, Dave F Clarke
OBJECTIVE Seizure onset within the insula is increasingly recognized as a cause of intractable epilepsy. Surgery within the insula is difficult, with considerable risks, given the rich vascular supply and location near critical cortex. MRI-guided laser interstitial thermal therapy (LiTT) provides an attractive treatment option for insular epilepsy, allowing direct ablation of abnormal tissue while sparing nearby normal cortex. Herein, the authors describe their experience using this technique in a large cohort of children undergoing treatment of intractable localization-related epilepsy of insular onset...
October 13, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29027292/sr-isotope-measurement-of-basaltic-glasses-by-la-mc-icp-ms-based-on-a-linear-relationship-between-analytical-bias-and-rb-sr-ratios
#4
Le Zhang, Zhong-Yuan Ren, Ya-Dong Wu, Nan Li
RATIONALE: In-situ Sr isotope analysis of geological samples by laser ablation multiple collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS) provides useful information about magma mixing, crustal contamination and crystal residence time. Without chemical separation, during Sr isotope analysis with laser ablation, many kinds of interference ions (such as Rb(+) and Kr(+) ) are on the Sr isotope spectrum. Most previous in-situ Sr isotope studies only focused on Sr-enriched minerals (e...
October 13, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29026310/laser-interstitial-thermal-therapy-for-the-treatment-of-epilepsy-evidence-to-date
#5
REVIEW
Navika D Shukla, Allen L Ho, Arjun V Pendharkar, Eric S Sussman, Casey H Halpern
Medically intractable epilepsy is associated with increased morbidity and mortality. For those with focal epilepsy and correlated electrophysiological or radiographic features, open surgical resection can achieve high rates of seizure control, but can be associated with neurologic deficits and cognitive effects. Recent innovations have allowed for more minimally invasive methods of surgical seizure control such as magnetic resonance-guided laser interstitial therapy (MRgLITT). MRgLITT achieves the goal of ablating seizure foci while preserving neuropsycho-logical function and offering real-time feedback and monitoring of tissue ablation...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29024882/quantitative-mapping-of-elements-in-basil-leaves-ocimum-basilicum-based-on-cesium-concentration-and-growth-period-using-laser-ablation-icp-ms
#6
Jung Aa Ko, Naoki Furuta, Heung Bin Lim
Quantitative elemental mapping of metallic pollutants in sweet basil was studied by laser ablation (LA)-ICP-MS. For this, the sweet basil was cultivated in Hoagland nutrient solution spiked with 100 and 1000 ng mL(-1) of Cs for 10-60 days. Then, the Cs distribution in collected leaves was determined by LA-ICP-MS using lab-synthesized standard pellets based on NIST 1573a tomato leaves. For comparison, S, Ca, and K were also simultaneously determined in this measurement with a(13)C(+) signal from the leaves as an internal standard...
October 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/29023719/natural-variability-and-effects-of-cleaning-and-storage-procedures-on-vertebral-chemistry-of-the-blacktip-shark-carcharhinus-limbatus
#7
J P Lewis, W F Patterson, J K Carlson
Key methodological assumptions regarding the degree of natural variability and influence of sample handling and storage of elasmobranch vertebral chemistry were assessed using laser-ablation inductively coupled plasma mass spectrometry. Vertebral chemistry of juvenile blacktip sharks Carcharhinus limbatus was examined to identify whether differences existed among different regions of the vertebral column, between thoracic vertebrae of individual fish or within individual vertebrae. Additionally, the effects of bleach exposure and storage in ethanol on vertebral chemistry were compared...
October 10, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/29021996/characterisation-of-mineral-deposition-systems-associated-with-rock-art-in-the-kimberley-region-of-northwest-australia
#8
Helen Green, Andrew Gleadow, Damien Finch
This data article contains mineralogical and chemical data from mineral accretions sampled from rock art shelters in the Kimberley region of north west Australia. The accretions were collected both on and off pigment and engraved rock art of varying styles observed in the Kimberley with an aim of providing a thorough understanding of the formation and preservation of such materials in the context of dating [1]. This contribution includes processed powder X-ray Diffraction data, Scanning Electron Microscopy energy dispersive spectroscopy data, and Laser Ablation ICP-MS trace element mapping data...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/29020780/-selective-feticide-in-monochorionic-twin-pregnancies-with%C3%A2-discordant-fetal-anomalies-management-and-outcome
#9
J Vojtěch, L Hašlík, R Pock, K Běhávková, K Macková, P Hanulíková, H Heřman, L Krofta
OBJECTIVE: To analyze results and outcome after selective feticide for discordant anomalies in monochorionic twins. DESIGN: Prospective cohort study. SETTING: Fetal medicine center, Institute for the Care of Mother and Child, Praha. METHODS: Analysis of outcome of monochorionic pregnancies after intrauterine surgery for structural abnormalities between January 2013 and June 2016. RESULTS: We performed 13 intrauterine operations in monochorionic twins with structural anomalies during the period...
2017: Ceská Gynekologie
https://www.readbyqxmd.com/read/29020479/silicone-gel-enhances-the-efficacy-of-er-yag-laser-treatment-for-atrophic-acne-scars-a-randomized-split-face-evaluator-blinded-placebo-controlled-comparative-trial
#10
Jenvajee Khamthara, Chanat Kumtornrut, Korbkarn Pongpairoj, Pravit Asawanonda
BACKGROUND: The effect of topical silicone gel has been studied to prevent scars from burn, post operative wound and to treat hypertrophic scars. No previous studies have been done to evaluate the efficacy of topical silicone gel on atrophic acne scars. MATERIAL AND METHODS: Nineteen patients were treated with 3 sessions of ablative Er:YAG laser with 1-month intervals. Following each laser treatment, the randomly-assigned silicone gel or placebo were applied in split-face manner...
October 11, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29019582/ultrasound-guided-foam-sclerotherapy-for-severe-chronic-venous-insufficiency
#11
Guilherme Camargo Gonçalves de-Abreu, Otacílio de Camargo, Márcia Fayad Marcondes de-Abreu, José Luís Braga de-Aquino
Chronic venous insufficiency is characterized by cutaneous alterations caused by venous hypertension; in severe forms, it progresses to lower limb ulcers. Lower limb varicose veins are the main cause of chronic venous insufficiency, and the classic treatment includes surgery and compressive therapy. Minimally invasive alternative treatments for varicose veins include new techniques such as venous thermal ablation using laser or radiofrequency. The use of different methods depends on clinical and anatomical factors...
September 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/29018762/visual-performance-after-excimer-laser-photorefractive-keratectomy-for-high-myopia
#12
Yu-Ling Liu, Chien-Chi Tseng, Chang-Ping Lin
PURPOSE: To evaluate the efficacy, safety, predictability, and visual performance of excimer laser photorefractive keratectomy (PRK) for myopia greater than -8 diopters (D). METHODS: Fifty-four patients (104 eyes) with myopia from -8D to -13D and cylinder up to -4D received surface ablation technique with the Allegretto wave version 1009-1 excimer laser to correct their refractive error. The patients were examined on days 1, 3, 7, and 14 and 1, 3, 6, and 12 months postoperatively...
April 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/29017027/microtubule-sliding-within-the-bridging-fiber-pushes-kinetochore-fibers-apart-to-segregate-chromosomes
#13
Kruno Vukušić, Renata Buđa, Agneza Bosilj, Ana Milas, Nenad Pavin, Iva M Tolić
During cell division, mitotic spindle microtubules segregate chromosomes by exerting forces on kinetochores. What forces drive chromosome segregation in anaphase remains a central question. The current model for anaphase in human cells includes shortening of kinetochore fibers and separation of spindle poles. Both processes require kinetochores to be linked with the poles. Here we show, by combining laser ablation, photoactivation, and theoretical modeling, that kinetochores can separate without any attachment to one spindle pole...
October 9, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28994425/targeting-ligand-functionalized-photothermal-scaffolds-for-cancer-cell-capture-and-in-situ-ablation
#14
Jing Zhang, Jingchao Li, Xiuhui Wang, Naoki Kawazoe, Guoping Chen
Scaffolds have been explored as a useful carrier to deliver efficient photothermal conversion agents for localized photothermal therapy applications because they can confine the agents in designated regions. However, cell capture by porous structures cannot discriminate between cancer cells and normal cells. In this study, folic acid (FA) as a typical targeting ligand for cancer cells was introduced into the porous photothermal scaffolds. Poly-l-lysine was mixed with gelatin to increase the amino side groups for FA incorporation...
October 10, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28992409/hypoxia-targeting-tumor-microenvironment-responsive-nanocluster-bomb-for-radical-enhanced-radiotherapy
#15
Da Huo, Sen Liu, Chao Zhang, Jian He, Zhengyang Zhou, Hao Zhang, Yong Hu
Although ultrasmall metal nanoparticles (NPs) have been used as radiosensitizers to enhance the local damage to tumor tissues while reducing injury to the surrounding organs, their rapid clearance from the circulatory system and the presence of hypoxia within the tumor continue to hamper their further application in radiotherapy (RT). In this study, we report a size tunable nanocluster bomb with a initial size of approximately 33 nm featuring a long half-life during blood circulation and destructed to release small hypoxia microenvironment-targeting NPs (∼5 nm) to achieve deep tumor penetration...
October 11, 2017: ACS Nano
https://www.readbyqxmd.com/read/28991341/repair-of-irregularly-irregular-astigmatism-by-transepithelial-phototherapeutic-keratectomy
#16
Stefano Guglielmetti, Amy Kirton, Dan Z Reinstein, Glenn I Carp, Timothy J Archer
PURPOSE: To evaluate the outcome of transepithelial phototherapeutic keratectomy (PTK) in the management of irregularly irregular astigmatism. METHODS: This was a case series of two patients who underwent transepithelial PTK for irregularly irregular astigmatism. In the first case, the patient complained of diplopia due to corneal scarring caused by a metallic foreign body injury. The topography demonstrated irregularly irregular astigmatism with significant asymmetry in the inferotemporal to superonasal axis...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28990682/ex-vivo-feasibility-study-of-endoscopic-intraductal-laser-ablation-of-the-breast
#17
Tjeerd de Boorder, Laurien Waaijer, Paul J van Diest, Arjen J Witkamp
OBJECTIVE: To determine the feasibility and safety of breast endoscopic thulium laser ablation for treatment of intraductal neoplasia. STUDY DESIGN: Ductoscopy is a minimally invasive endoscopic approach of the milk ducts of the breast via the nipple. Besides diagnosis in women with pathologic nipple discharge (PND), it allows non-invasive removal of intraductal lesions with a stalk like papillomas. Removal, however, is often incomplete and flat lesions cannot be targeted...
October 9, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28990235/application-of-10-13-ohm-faraday-cup-current-amplifiers-for-boron-isotopic-analyses-by-solution-mode-and-laser-ablation-mc-icp-ms
#18
Nicholas S Lloyd, Aleksey Yu Sadekov, Sambuddha Misra
RATIONALE: Boron isotope ratios (δ(11) B values) are used as a proxy for seawater paleo-pH, amongst several other applications. The analytical precision can be limited by the detection of low intensity ion beams from limited sample amounts. High-gain amplifiers offer improvements in signal/noise ratio and can be used to increase measurement precision and reduce sample amounts. METHODS: 10(13) ohm amplifier technology has previously been applied to several radiogenic systems, but has thus far not been applied to non-traditional stable isotopes...
October 9, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28989676/rapid-determination-of-medulloblastoma-subgroup-affiliation-with-mass-spectrometry-using-a-handheld-picosecond-infrared-laser-desorption-probe
#19
Michael Woolman, Isabelle Ferry, Claudia M Kuzan-Fischer, Megan Wu, Jing Zou, Taira Kiyota, Semra Isik, Delaram Dara, Ahmed Aman, Sunit Das, Michael D Taylor, James T Rutka, Howard J Ginsberg, Arash Zarrine-Afsar
Medulloblastoma (MB), the most prevalent malignant childhood brain tumour, consists of at least 4 distinct subgroups each of which possesses a unique survival rate and response to treatment. To rapidly determine MB subgroup affiliation in a manner that would be actionable during surgery, we subjected murine xenograft tumours of two MB subgroups (SHH and Group 3) to Mass Spectrometry (MS) profiling using a handheld Picosecond InfraRed Laser (PIRL) desorption probe and interface developed by our group. This platform provides real time MS profiles of tissue based on laser desorbed lipids and small molecules with only 5-10 seconds of sampling...
September 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28986576/fractional-laser-releases-tumor-associated-antigens-in-poorly-immunogenic-tumor-and-induces-systemic-immunity
#20
Masayoshi Kawakubo, Trevor J Cunningham, Shadmehr Demehri, Dieter Manstein
Currently ablative fractional photothermolysis (aFP) with CO2 laser is used for a wide variety of dermatological indications. This study presents and discusses the utility of aFP for treating oncological indications. We used a fractional CO2 laser and anti-PD-1 inhibitor to treat a tumor established unilaterally by the CT26 wild type (CT26WT) colon carcinoma cell line. Inoculated tumors grew significantly slower in aFP-treated groups (aFP and aFP + anti-PD-1 groups) and complete remission was observed in the aFP-treated groups...
October 6, 2017: Scientific Reports
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