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Oxidation of polystyrene aerosols by VUV-photolysis and/or ozone
Vicente, Jose Salas,Gejo, Juan Lopez,Rothenbacher, Sonja,Sarojiniamma, Sumalekshmy,Gogritchiani, Eliso,Worner, Michael,Kasper, Gerhard,Braun, Andre M. Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.7
Aerosols of submicron polystyrene particles were oxidized by either vacuum-ultraviolet (VUV) irradiation in the presence of molecular oxygen ($O_2$) and/or by ozone ($O_3$). Different degrees of oxidation and oxidative degradation were reached by VUV-photolysis depending on radiant energy, $O_2$ and $H_2O$ concentrations in the bulk gas mixture as well as on particle diameter. The same functionalization was obtained by exposing the aerosol to $O_3$, however, oxidation, in particular oxidative degradation, was less efficient. The evolution of hydroxyl and carbonyl functions introduced was quantified by ATR-FTIR spectroscopy of filtered particles, and oxidative degradation of the polymer particles was confirmed by determining size and number of aerosol particles before and after oxidation. Efficiency analyses are based on the results of an $O_3$ actinometry and on an evaluation of the rate of absorbed photons by the aerosol particles in function of their size.
Vicente Pla-Martí,Jose Martín-Arévalo,Rosa Martí-Fernández,David Moro-Valdezate,Stephanie García-Botello,Alejandro Espí-Macías,Miguel Mínguez-Pérez,Maria Dolores Ruiz-Carmona,Jose Vicente Roig-Vila 대한대장항문학회 2022 Annals of Coloproctolgy Vol.38 No.1
Purpose: This study was performed to evaluate the long-term evolution of continence and patient’s quality of life after surgical treatment for obstetric fecal incontinence. Methods: A prospective longitudinal study was conducted including consecutive patients who underwent sphincteroplasty for severe obstetric fecal incontinence. The first phase analyzed changes in continence and impact on quality of life. The second phase studied the long-term evolution reevaluating the same group of patients 6 years later. Degree of fecal incontinence was calculated using the Cleveland Clinic Score (CCS). Quality of life assessment was carried out with the Fecal Incontinence Quality of Life scale. Results: Thirty-five patients with median age of 55 years (range, 28 to 73 years) completed the study. Phase 1 results: after a postoperative follow-up of 30 months (4 to 132 months), CCS had improved significantly from a preoperative of 15.7±3.1 to 6.1±5.0 (P<0.001). Phase 2 results: median follow-up in phase 2 was 110 months (76 to 204 months). The CCS lowered to 8.4±4.9 (P=0.04). There were no significant differences between phases 1 and 2 in terms of quality of life; lifestyle (3.47± 0.75 vs. 3.16±1.04), coping/behavior (3.13±0.83 vs. 2.80±1.09), depression/self-perception (3.65±0.80 vs. 3.32± 0.98), and embarrassment (3.32±0.90 vs. 3.12±1.00). Conclusion: Sphincteroplasty offers good short-medium term outcomes in continence and quality of life for obstetric fecal incontinence treatment. Functional clinical results deteriorate over time but did not impact on patients’ quality of life.
Decreased Esophageal Sensitivity to Acid in Morbidly Obese Patients: A Cause for Concern?
( Vicente Ortiz ),( Diego Alvarez-sotomayor ),( Esteban Saez-gonzalez ),( Francia Carolina Diaz-jaime ),( Marisa Iborra ),( Julio Ponce ),( Vicente Garrigues ) 대한간학회 2017 Gut and Liver Vol.11 No.3
Background/Aims: To evaluate esophageal sensitivity to acid between morbidly obese (MO) patients and non-MO controls with abnormal esophageal acid exposure. Methods: We conducted a cross-sectional study of 58 patients: 30 MO (cases) and 28 non-MO (controls). Esophageal symptoms and esophageal sensitivity to 0.1 M hydrochloric acid solution (Bernstein test) were compared between MO and non- MO patients with a prior diagnosis of abnormal esophageal acid exposure. Results: MO patients were less symptomatic than non-MO controls (14% vs 96%; odds ratio [OR], 0.006; 95% confidence interval [CI], 0.001 to 0.075; p=0.000). MO patients were more likely to present with decreased esophageal sensitivity to the instillation of acid than non-MO controls (57% vs 14%; OR, 8; 95% CI, 1.79 to 35.74; p=0.009). Subgroup analysis revealed no differences in esophageal sensitivity in MO patients with and without abnormal esophageal acid exposure (43% vs 31%; p=0.707). Conclusions: Silent gastroesophageal reflux disease (GERD) is common among MO individuals, likely due to decreased esophageal sensitivity to acid. The absence of typical GERD symptoms in these patients may delay discovery of precancerous conditions, such as Barrett`s esophagus. We believe that these patients may require a more aggressive diagnostic work-up to rule out the presence of silent GERD. (Gut Liver 2017;11:358-362)
Vicente E. Escandell Sosa 한국외국어대학교 국제지역연구센터 2016 국제지역연구 Vol.20 No.2
From an ideological perspective, there are challenges for re-establishing the diplomatic relationship between the Cuba and the USA. Given that this bilateral relationship should be grounded on the ideologies, we argue that it is time to revalue the philosophy of Jose Marti and thus develop our ideological responsibility and rights.
Potential strategies for prevention of tumor spillage in minimally invasive radical hysterectomy
Vicente Bebia,Sonia Monreal-Clua,Assumpció Pérez-Benavente,Silvia Franco-Camps,Berta Díaz-Feijoo,Antonio Gil-Moreno 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.5
Objective: The publication of a prospective [1] and several retrospective [2,3] studiesdescribing a worse prognosis in patients affected with early-stage cervical cancer whounderwent a minimally invasive radical hysterectomy has raised a high concern in whatmeasures should be undertaken in order to revert these results. Potential strategies [4] toprevent tumor spillage have been previously proposed. Methods: In this video, we describe nine strategies that should be addressed in future trialsregarding this procedure. Results: These strategies are:1. Fallopian tubes should be coagulated prior to start the surgery. 2. All sentinel lymph nodes and lymphadenectomy specimens should be obtained withoutlymph nodes fragmentation. 3. All surgical specimens should be extracted within a containment bag. 4. Uterine manipulators must never be used. 5. Prior to vaginal section, a closed knotted ligature should be placed around the vagina,proximal to the section line, and the remaining vaginal cavity profusely washed. 6. Once the vagina is opened, the surgical specimen should be extracted vaginally within aspecimen retrieval bag. 7. After surgery, the pelvic cavity is profusely washed with physiological serum, and the vaginashould be washed with iodopovidone diluted to 10% [5]. 8. Port-site metastasis prevention measures should be performed. 9. Every action made to prevent tumor spillage should be recorded in the surgical report. Conclusion: As there is a biological rationale in these measures that would prevent tumorspillage and seeding, there is a need of prospectively exploring them within appropriatestudies in order to determine their own oncological outcome.
Vicente Navarro,Laura Asensio,Heidar Gharbieh,Gema De la Morena,Veli-Matti Pulkkanen 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.4
This work describes the development of a numerical module with a multiphysics structure to simulatethe thermo-hydro-chemo-mechanical behavior of compacted bentonites. First, the conceptual model,based on the state-of-the-art formulation for clay-based engineered barriers in deep geological repositories,is described. Second, the advantages of multiphysics-based modules are highlighted. Then, theguidelines to develop a code using such tools are outlined, presenting an example of implementation. Finally, the simulation of three tests that illustrate the behavior of compacted bentonites assesses thescope of the developed code. The satisfactory results obtained, and the relative simplicity of implementation,show the opportunity of the modeling strategy proposed