Uso de morteros catalíticos sobre paneles, para el análisis de la reducción de partículas contaminantes en el aire

Trabajo de Investigación TecnológicaEste proyecto de grado se enfoca en la contaminación del aire y el uso de las nuevas tecnologías en la construcción para combatir este problema que genera afectaciones no solo ambientales, sino en la salud humana, en la flora y la fauna. La nanotecnología, es una rama que se desprende de las nuevas tecnologías y que se ha abierto paso en la industria de la construcción, por medio de la implementación de materiales y aditivos te tamaño nanométrico que mejoran y generan nuevas propiedades en los materiales comunes de construcción como el acero, concretos, morteros, pinturas, etc. En este proyecto se elaboró un concreto y mortero adicionando el Dióxido de titanio (TiO2), el cual actúa como un catalizador al combinarse con el cemento y los rayos ultra violeta, y su función principal es oxidar las partículas contaminantes suspendidas en el aire, por lo cual se categoriza como un descontaminante. Adicionalmente, el TiO2 puede mejorar las propiedades del concreto. Para comprobar el efecto del TiO2 en el concreto, se elaboraron cuatro cilindros de concreto común y de concreto adicionado, los cuales se fallaron en las edades típicas de falla y se compararon los resultados obtenidos. De igual manera, se fabricó un mortero adicionado, el cual se colocó sobre paneles y se dejó expuesto ocho días en un área de monitoreo de aire, y con los datos obtenidos se realizó el análisis correspondiente.1 INTRODUCCIÓN 2 ANTECEDENTES 3 PLANTEAMIENTO DEL PROBLEMA 4 OBJETIVOS 5 JUSTIFICACIÓN 6 DELIMITACIONES 7 MARCO DE REFERENCIA 8 METODOLOGÍA 9 DISEÑO METODOLÓGICO. 10 CONCLUSIONES 11 RECOMENDACIONES BIBLIOGRAFÍAPregradoIngeniero Civi

Evaluation of a recombinant human gelatin as a substitute for a hydrolyzed porcine gelatin in a refrigerator-stable Oka/Merck live varicella vaccine

BACKGROUND: The labile nature of live, attenuated varicella-zoster virus (Oka/Merck) requires robust stabilization during virus bulk preparation and vaccine manufacturing in order to preserve potency through storage and administration. One stabilizing ingredient used in a varicella-zoster virus (VZV) vaccine is hydrolyzed porcine gelatin which represents the major protein/peptide-based excipient in the vaccine formulation. METHODS: In this comparative study, a recombinant human gelatin fragment (8.5 kD) was assessed as a potential replacement for hydrolyzed porcine gelatin in an experimental live, attenuated VZV (Oka/Merck) vaccine. VZV (Oka/Merck) was harvested in two formulations prepared with either a hydrolyzed porcine gelatin or a recombinant human gelatin. Moreover, the viral stability in the experimental VZV (Oka/Merck) vaccines was evaluated under accelerated and real-time conditions in a comparative study. RESULTS AND DISCUSSION: The stabilizing effect of recombinant human gelatin on VZV (Oka/Merck) potency change during vaccine lyophilization was similar to the experimental vaccine containing porcine-derived gelatin. Vaccine viral potency changes were comparable in stabilized VZV (Oka/Merck) formulations containing either hydrolyzed porcine gelatin or recombinant human gelatin. No statistically significant difference in potency stability was observed between the vaccine formulations stored at any of the temperatures tested. CONCLUSION: The recombinant human gelatin demonstrated similar ability to stabilize the live attenuated VZV (Oka/Merck) in an experimental, refrigerator-stable varicella vaccine when compared to the vaccine preparation formulated with hydrolyzed porcine gelatin used in currently marketed varicella vaccine

The Grizzly, September 22, 1998

Ursinus Gears Up for Family Day • Dr. Fouts Gives Lecture on Chimpanzee Research • Freshman Class Election Results • Opinion: Ursinus\u27 Movement Towards Diversity; In Response to Has America Sunk to the Level of Terrorists? • Presentations on Family Day • Help is out There • Old Dogs Don\u27t Need New Tricks • Big, Big Band: Big, Big Success • Theater Life • Field Hockey Wrap-Up • UC Volleyball Evens Out at 2-2 • Bears Recognized in Centennial Conference Honor Roll • Lady Bears Suffer Conference Losses • Men\u27s Soccer Split Games • Football Falls in Conference Opener • Flo Jo Dies at 38 • Ripken Ends Streakhttps://digitalcommons.ursinus.edu/grizzlynews/1424/thumbnail.jp

The Grizzly, September 9, 1998

Campus Mourns Loss of Colleague and Friend • Ursinus Loses Distinguished Alum and Benefactor • New Additions to Corson • Ursinus Welcomes New Resident Directors, Dyess and Ray • Renowned Psychologist to Speak on Research • Black History Figure of the Week: Peter Salem (1750-1816) • Opinion: Bill Clinton and the Hype About Sexual Harassment • 10 + 29 = Bridge Success • UC Bio Rocks • Independence in Avignon • Labyrinth Brings Relaxation • Mice Research Helping Humans • Ursinus Football Off to Rocky Start • Field Hockey in Full Swing • This Week in Soccer • UC Volleyball Blanks Rosemonthttps://digitalcommons.ursinus.edu/grizzlynews/1422/thumbnail.jp

A Systematic Review of Occupational Exposure to Particulate Matter and Cardiovascular Disease

Exposure to ambient particulate air pollution is a recognized risk factor for cardiovascular disease; however the link between occupational particulate exposures and adverse cardiovascular events is less clear. We conducted a systematic review, including meta-analysis where appropriate, of the epidemiologic association between occupational exposure to particulate matter and cardiovascular disease. Out of 697 articles meeting our initial criteria, 37 articles published from January 1990 to April 2009 (12 mortality; 5 morbidity; and 20 intermediate cardiovascular endpoints) were included. Results suggest a possible association between occupational particulate exposures and ischemic heart disease (IHD) mortality as well as non-fatal myocardial infarction (MI), and stronger evidence of associations with heart rate variability and systemic inflammation, potential intermediates between occupational PM exposure and IHD. In meta-analysis of mortality studies, a significant increase in IHD was observed (meta-IRR = 1.16; 95% CI: 1.06–1.26), however these data were limited by lack of adequate control for smoking and other potential confounders. Further research is needed to better clarify the magnitude of the potential risk of the development and aggravation of IHD associated with short and long-term occupational particulate exposures and to clarify the clinical significance of acute and chronic changes in intermediate cardiovascular outcomes

Health assessment of taxi drivers in the city of Tshwane

Background: Taxi driving seems to be a strenuous occupation. There was evidence-based paucity of literature on health assessment of taxi drivers. Meanwhile taxi drivers of South Africa were burdened by communicable and non-communicable diseases including high-level exposure to injuries and criminal attacks. Health assessment of this cohort group enables mitigation to engage in appropriation of relevant interventions related to the occupational needs of taxi drivers. Objectives: The objective of the study was to conduct health assessment of taxi drivers in the city of Tshwane to identify health risk factors. Method: An exploratory, descriptive and quantitative survey was conducted and anthropometric measurements of blood pressure, body mass index and waist circumference were monitored and recorded on a convenience sample of 69 taxi drivers in Tshwane Municipality. Consent was sought from individual taxi drivers who participated in the study, while taxi rank queue marshals assisted with smooth running of the process. Data were gathered using a questionnaire. Data analysis was performed using statistical STATA II with the assistance of a statistician. Results: The study found that taxi drivers were obese, hypertensive, had type II diabetes-related risk factors, including unhealthy life style practices. The results indicate that the general health of taxi drivers impacts their occupation. Conclusion: The findings implicate that the health status of taxi operators in Tshwane was a serious concern and urgent concerted effort is needed to engage in lifestyle modification of taxi drivers. The need for health promotion and formalised occupational health services was recommended

Asthmatics Exhibit Altered Oxylipin Profiles Compared to Healthy Individuals after Subway Air Exposure

Asthma is a chronic inflammatory lung disease that causes significant morbidity and mortality worldwide. Air pollutants such as particulate matter (PM) and oxidants are important factors in causing exacerbations in asthmatics, and the source and composition of pollutants greatly affects pathological implications.This randomized crossover study investigated responses of the respiratory system to Stockholm subway air in asthmatics and healthy individuals. Eicosanoids and other oxylipins were quantified in the distal lung to provide a measure of shifts in lipid mediators in association with exposure to subway air relative to ambient air.Sixty-four oxylipins representing the cyclooxygenase (COX), lipoxygenase (LOX) and cytochrome P450 (CYP) metabolic pathways were screened using liquid chromatography-tandem mass spectrometry (LC-MS/MS) of bronchoalveolar lavage (BAL)-fluid. Validations through immunocytochemistry staining of BAL-cells were performed for 15-LOX-1, COX-1, COX-2 and peroxisome proliferator-activated receptor gamma (PPARγ). Multivariate statistics were employed to interrogate acquired oxylipin and immunocytochemistry data in combination with patient clinical information.Asthmatics and healthy individuals exhibited divergent oxylipin profiles following exposure to ambient and subway air. Significant changes were observed in 8 metabolites of linoleic- and α-linolenic acid synthesized via the 15-LOX pathway, and of the COX product prostaglandin E(2) (PGE(2)). Oxylipin levels were increased in healthy individuals following exposure to subway air, whereas asthmatics evidenced decreases or no change.Several of the altered oxylipins have known or suspected bronchoprotective or anti-inflammatory effects, suggesting a possible reduced anti-inflammatory response in asthmatics following exposure to subway air. These observations may have ramifications for sensitive subpopulations in urban areas

The Nordic Expert Group for Criteria Documentation of Health Risks from Chemicals. 153. Occupational chemical exposures and cardiovascular disease

The main task of the Nordic Expert Groupfor Criteria Documentation of Health Risks from Chemicals (NEG) is to produce criteria documents to be used by the regulatory authoritiesasthescientific basis for setting occupational exposure limits for chemical substances. For each document, NEG appoints one or several authors. An evaluation is made of all relevant published, peer-reviewed original literaturefound. Whereas NEG adopts the document by consensus procedures,therebygrantingthequalityandconclusions, theauthorsareresponsible for the factual content of the document.The evaluation of the literature and the drafting of this document on Occupational chemical exposures and cardiovascular diseasewere done by Dr Bengt Sjögren, Dr Carolina Bigert and Prof. Per Gustavsson at the Institute of Environmental Medicine, Karolinska Institutet, Sweden. The draft versions were discussed within NEG and the final version was adopted at the NEG meeting on 9 May 2019. Editorial work and technical editing were performed by the NEG secretariat

Probabilistic detection of context-sensitive spelling errors

This article focuses on the evaluation of a novel algorithm for the detection of context-sensitive spelling errors. We present a fully automatic evaluation procedure with no requirements of manual work or resources annotated with spelling errors. The evaluation method is applicable to any language and tag set, and is easily adaptable to other NLP systems such as taggers and parsers. 1