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l, Rhinological and Otological Society, Inc.Solvation is a notoriously difficult and nagging problem for the rigorous theoretical description of chemistry in the liquid phase. Successes and failures of various approaches ranging from implicit solvation modeling through dielectric continuum embedding and microsolvated quantum chemical modeling to explicit molecular dynamics highlight this situation. Here, we focus on quantum chemical microsolvation and discuss an explicit conformational sampling ansatz to make this approach systematic. For this purpose, we introduce an algorithm for rolling and automated microsolvation of solutes. Our protocol takes conformational sampling and rearrangements in the solvent shell into account. Its reliability is assessed by monitoring the evolution of the spread and average of the observables of interest. © 2020 Wiley Periodicals, Inc.OBJECTIVES/HYPOTHESIS The Reflux Symptom Index (RSI) is a validated quality-of-life instrument that quantifies symptoms associated with laryngopharyngeal reflux (LPR). Many dysphonic patients are managed empirically for reflux. In this study, we examine responses to the RSI in patients with dysphonia attributable to a variety of pathologies. STUDY DESIGN Retrospective cohort study. METHODS This is an institutional review board-approved study. All patients presented to a tertiary care voice center January 2011 to June 2016 with the chief complaint of dysphonia. Patients were analyzed by 1) diagnosis and 2) treatment modality surgery, medicine, or voice therapy (VT). Data collected included pre- and postintervention RSI and Voice Handicap Index, demographic, and clinical information. Statistical analysis was performed using SPSS. RESULTS Five hundred forty-six dysphonic patients were included. One hundred forty required surgery, 155 were treated with VT alone, and 251 were medically managed (MM). Prior to therapy, 63.4% of surgery patients, 62.5% of VT patients, and 74.6% of MM patients had an abnormal RSI with a score greater than 13. The most common diagnosis for each group was vocal cord paresis/paralysis (surgery), vocal fold atrophy (VT), and LPR (MM). There was a statistically significant improvement in RSI after treatment for each group. CONCLUSIONS In patients with dysphonia, pretreatment RSI scores were elevated for a variety of laryngeal pathologies. Scores often improved with directed treatment, regardless of etiology. This highlights the symptom overlap between reflux and nonreflux causes of dysphonia, and the importance of a comprehensive workup for patients with voice complaints. LEVEL OF EVIDENCE 4 Laryngoscope, 2020. © 2020 The American Laryngological, Rhinological and Otological Society, Inc.Photodynamic therapy [dye-light therapy] is an excellent technique for use in detection and treatment of cancerous tissues. While this therapy is effective, it is limited by the phototoxic reactions that can occur in the surrounding normal tissues. These damaging side effects are of particular importance when treating neurosensory organs, such as the human eye. We report here new treatment strategies to enhance photodynamic effectiveness while limiting side effects to normal tissues. Published 2020. This article is a U.S. Government work and is in the public domain in the USA.PURPOSE In a recent article, our group proposed a fast direct aperture optimization (DAO) algorithm for fixed-gantry intensity-modulated radiation therapy (IMRT) called fast inverse direct aperture optimization (FIDAO). When tested on fixed-gantry IMRT plans, we observed up to a 200-fold increase in the optimization speed. Compared to IMRT, rotational volumetric-modulated arc therapy (VMAT) is a much larger optimization problem and has many more delivery constraints. The purpose of this work is to extend and evaluate FIDAO for inverse planning of VMAT plans. METHODS A prototype FIDAO algorithm for VMAT treatment planning was developed in MATLAB using the open-source treatment planning toolkit matRad (v2.2 dev_VMAT build). VMAT treatment plans using one 3600 arc were generated on the AAPM TG-119 phantom, as well as sample clinical liver and prostate cases. selleck inhibitor The plans were created by first performing fluence map optimization on 28° equispaced beams, followed by aperture sequencing and arc sequencing with a gantry angular sampling rate of 4°. After arc sequencing, a copy of the plan underwent DAO using the prototype FIDAO algorithm, while another copy of the plan underwent DAO using matRad's DAO method, which served as the conventional algorithm. RESULTS Both algorithms achieved similar plan quality, although the FIDAO plans had considerably fewer hot spots in the unspecified normal tissue. The optimization time (number of iterations) for FIDAO and the conventional DAO algorithm, respectively, were 65 s (245) vs 602 s (275) in the TG-119 phantom case; 25 s (85) vs 803 s (159) in the liver case; and 99 s (174) vs 754 s (149) in the prostate case. CONCLUSIONS This study demonstrated promising speed enhancements in using FIDAO for the direct aperture optimization of VMAT plans. © 2020 American Association of Physicists in Medicine.OBJECTIVE Thermal spring waters (TSW) are commonly used as active ingredients in cosmetics. Their biological activities directly depend on the ionic composition of the spring. However, in order to exhibit beneficial properties, the minerals need to reach viable skin layers. The present study addresses the incorporation of marketed TSW in model cosmetic formulations and the impact of the formulation on skin absorption of magnesium and calcium ions that are known to improve skin barrier function. METHODS Marketed TSW was introduced into five formulations. Liposomes were prepared using saturated or unsaturated phospholipids mixed with cholesterol by the thin layer evaporation technique. Emulsions water-in-oil (W/O), oil-in-water (O/W) or double water-in-oil-in-water (W/O/W) were prepared by high shear mixing. Skin absorption of Mg2+ and Ca2+ from those formulations was studied in vitro using static Franz diffusion cells under infinite dose condition and under occlusion of the apparatus. RESULTS Mg2+ and Ca2+ penetrate skin samples from TSW.
My Website: https://www.selleckchem.com/products/Staurosporine.html
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