• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Topická a systémová léčba acne vulgaris / Topical and systemic treatment of acne vulgaris

Ackermannová, Veronika January 2020 (has links)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Student: Veronika Ackermannová Supervisor: prof. Radomír Hrdina, MD, CSc. Title of diploma thesis: Topic and systemic treatment of acne vulgaris Acne vulgaris is a skin disease affecting the hair follicles and sebaceous glands. The disease manifests itself by increased sebum production, non-inflammatory (comedones) and inflammatory lesions (papules, pustules, nodules, cysts). It occurs predominantly in adolescents, but may persist into adulthood. It is a multifactorial disease, which is caused by several factors (internal and external stimuli). The major pathogenetic factors include increased sebum production, hyperkeratosis, P. acnes colonization and inflammation present. First, it is necessary to diagnose the type of acne in order to choose the right and effective therapy, because there is not only one type of acne. There are many types and variants of acne, and although they show similar symptoms (affecting the follicles of sebaceous glands), their cause often differs. There is no uniform classification system for acne vulgaris and it varies between authors. Some authors classify acne vulgaris according to severity into mild, moderate and severe, others into comedonic, papulopustular, nodulocystic...
2

Etude du développement de biofilms dans des réacteurs de traitement d’eau / Study of the development of biofilms in water treatment reactors

Alnnasouri, Muatasem 08 December 2010 (has links)
Le développement de biofilms est étudié sur de longues périodes (de deux à sept mois) dans des réacteurs à disque tournant (RBC) et à lit fixe alimentés par des eaux résiduaires domestiques ou des substrats synthétiques en continu à l’échelle du laboratoire. Deux réacteurs ont été spécialement conçus pour des expériences. Les biofilms ont été soumis à des stress physiques (forces hydrodynamiques) ou chimiques (antibiotique). L’activité biologique des réacteurs a été suivie au cours du temps (dégradation de la pollution carbonée et azotée). Les phénomènes de détachement et de redéveloppement des biofilms ont été caractérisés sur des surfaces lisses ou structurées par des techniques d’analyse d’images non destructives. La quantité globale de biomasse présente est évaluée par l’opacité du biofilm et cette méthode d’évaluation a été validée par comparaison avec des méthodes classiques destructives (coloration au Cristal Violet, matières sèches). La macrostructure du biofilm, liées aux phénomènes de croissance, détachement et recroissance, a été évaluée à l’aide de deux méthodes de caractérisation de la texture visuelle : la méthode de cooccurrence de niveaux de gris (SGLDM) et la longueur des segments (GLRLM). Le travail montre l’efficacité de l’analyse d’images comme une méthode rapide et peu onéreuse dans l’étude des biofilms sur le long terme. / The development of biofilm has been studied over long periods of time (two to seven months) in laboratory-scale rotating biological contactors and fixed bed reactors continuously fed with municipal wastewater or synthetic growth media. Two reactors have been specifically designed for this purpose. The biofilms have been subject to hydrodynamic and chemical (antibiotics) stresses. The overall biological activity of the reactors have been monitored, in terms of carbon and nitrogen removal. The phenomena of sloughing and re-growth have been characterized on smooth and rough surfaces using image analysis non-destructive techniques. The amount of biomass present on the substratum has been evaluated by the biofilm opacity and this monitoring method has been validated by comparison with destructive methods such as crystal violet staining and dry weight. The biofilm macrostructure, related to growth, sloughing and re-growth phenomena, has been evaluated through visual texture characterization of the scanning gray level co-occurrence matrix (SGLDM) and the gray level run length method (GLRLM). The results shows the efficiency of image analysis as a rapid and cheap method to monitor biofilm development on the long term.

Page generated in 0.0347 seconds