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Search Results: 1 - 10 of 14 matches for " Buschle "
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Wall induced density profiles and density correlations in confined Takahashi lattice gases
Joachim Buschle,Philipp Maass,Wolfgang Dieterich
Physics , 1999, DOI: 10.1023/A:1018652808652
Abstract: We propose a general formalism to study the static properties of a system composed of particles with nearest neighbor interactions that are located on the sites of a one-dimensional lattice confined by walls (``confined Takahashi lattice gas''). Linear recursion relations for generalized partition functions are derived, from which thermodynamic quantities, as well as density distributions and correlation functions of arbitrary order can be determined in the presence of an external potential. Explicit results for density profiles and pair correlations near a wall are presented for various situations. As a special case of the Takahashi model we consider in particular the hard rod lattice gas, for which a system of nonlinear coupled difference equations for the occupation probabilities has been presented previously by Robledo and Varea. A solution of these equations is given in terms of the solution of a system of independent linear equations. Moreover, for zero external potential in the hard rod system we specify various central regions between the confining walls, where the occupation probabilities are constant and the correlation functions are translationally invariant in the canonical ensemble. In the grand canonical ensemble such regions do not exist.
Exact Density Functionals in One Dimension
Joachim Buschle,Philipp Maass,Wolfgang Dieterich
Physics , 1999,
Abstract: We propose a new and general method for deriving exact density functionals in one dimension for lattice gases with finite-range pairwise interactions. Corresponding continuum functionals are derived by applying a proper limiting procedure. The method is based on a generalised Markov property, which allows us to set up a rather transparent scheme that covers all previously known exact functionals for one-dimensional lattice gas or fluid systems. Implications for a systematic construction of approximate density functionals in higher dimensions are pointed out.
Comparison of fibrin adhesives prepared by 3 different methods
Cavichiolo, Juliana Benthien;Buschle, Maurício;Carvalho, Bettina;
International Archives of Otorhinolaryngology , 2013, DOI: 10.7162/S1809-97772013000100011
Abstract: introduction: fibrin tissue adhesive, which has applications in several areas of medicine, can be prepared by different methods. aim: to compare fibrin tissue adhesives prepared by 3 different methods. method: in this prospective experimental laboratory study, fibrin tissue adhesives prepared by the use of plasma fibrinogen (group 1), cryoprecipitation (group 2), and precipitation by ammonium sulfate (group 3) were tested on 15 rabbits and 10 fragments of dura mater. the quality of the clots was assessed in terms of the success of the healing process, local toxicity, graft adhesion capacity, and degree of adhesion of 2 fragments of dura mater produced. results: all methods produced a clot with high adhesion and no toxicity, but tensile strength testing revealed that the glue produced from the ammonium sulfate-precipitated clot (group 3) was the strongest, requiring 39 g/cm 2 to separate the fragments as opposed to 23 g/cm 2 for group 2 and 13 g/cm 2 for group 1. conclusion: all methods produced good results as far as clot formation and non-toxicity, but ammonium sulfate precipitation produced the best tensile strength and was thus the most effective method of preparing fibrin tissue adhesive.
Timanoplastia tipo 1 e miringoplastia na residência: resultados cirúrgicos e audiométricos
Sirena, Edgar;Carvalho, Bettina;Buschle, Mauricio;Mocellin, Marcos;
Arquivos Internacionais de Otorrinolaringologia , 2010, DOI: 10.1590/S1809-48722010000400006
Abstract: introduction: the tympanoplasty aims to reconstruct the tympanic membrane, restoring protection to the middle ear and improve hearing. in this study we evaluated the surgical results and audiometric this surgery, performed in the service of otorhinolaryngology, hc / ufpr by residents of the second year in the method: a retrospective study through review of medical records. results: among the 31 patients evaluated, there was closure of the perforation in 24 (80%) and hearing improvement with reduction or closure of the conductive gap by 60% and 26.7% respectively. discussion: the success rate of surgery was satisfactory and similar to that found in the literature, and factors such as age, presence of unilateral or bilateral pathology and size of perforation were not determinants of surgical success. conclusion: tympanoplasty performed by residents of the second year of residence showed satisfactory results regarding both surgical audiometric.
Comparison of fibrin adhesives prepared by 3 different methods
Cavichiolo, Juliana Benthien,Buschle, Maurício,Carvalho, Bettina
International Archives of Otorhinolaryngology , 2013,
Abstract: Introduction: Fibrin tissue adhesive, which has applications in several areas of medicine, can be prepared by different methods. Aim: To compare fibrin tissue adhesives prepared by 3 different methods. Method: In this prospective experimental laboratory study, fibrin tissue adhesives prepared by the use of plasma fibrinogen (group 1), cryoprecipitation (group 2), and precipitation by ammonium sulfate (group 3) were tested on 15 rabbits and 10 fragments of dura mater. The quality of the clots was assessed in terms of the success of the healing process, local toxicity, graft adhesion capacity, and degree of adhesion of 2 fragments of dura mater produced. Results: All methods produced a clot with high adhesion and no toxicity, but tensile strength testing revealed that the glue produced from the ammonium sulfate-precipitated clot (group 3) was the strongest, requiring 39 g/cm 2 to separate the fragments as opposed to 23 g/cm 2 for group 2 and 13 g/cm 2 for group 1. Conclusion: All methods produced good results as far as clot formation and non-toxicity, but ammonium sulfate precipitation produced the best tensile strength and was thus the most effective method of preparing fibrin tissue adhesive.
Timanoplastia myringoplasty type 1 and in residency surgical results and audiometric
Sirena, Edgar,Carvalho, Bettina,Buschle, Mauricio,Mocellin, Marcos
International Archives of Otorhinolaryngology , 2010,
Abstract: Introduction: The tympanoplasty aims to reconstruct the tympanic membrane, restoring protection to the middle ear and improve hearing. In this study we evaluated the surgical results and audiometric this surgery, performed in the service of Otorhinolaryngology, HC / UFPR by residents of the second year in the year 2008 and factors that may influence the results. Method: A retrospective study through review of medical records. Results: Among the 31 patients evaluated, there was closure of the perforation in 24 (80%) and hearing improvement with reduction or closure of the conductive gap by 60% and 26.7% respectively. Discussion: The success rate of surgery was satisfactory and similar to that found in the literature, and factors such as age, presence of unilateral or bilateral pathology and size of perforation were not determinants of surgical success. Conclusion: Tympanoplasty performed by residents of the second year of residence showed satisfactory results regarding both surgical audiometric.
Timanoplastia tipo 1 e miringoplastia na residência: resultados cirúrgicos e audiométricos
Sirena, Edgar,Carvalho, Bettina,Buschle, Mauricio,Mocellin, Marcos
Arquivos Internacionais de Otorrinolaringologia , 2010,
Abstract: Introdu o: A timpanoplastia tem por objetivo reconstruir a membrana timpanica, restaurando a prote o à orelha media e melhorando a audi o. Nesse estudo foram avaliados os resultados cirúrgicos e audiométricos dessa cirurgia, realizada no servi o de Otorrinolaringologia do HC/UFPR por residentes do 2o ano durante o ano de 2008, bem como alguns fatores que possam influenciar nos resultados. Método: Estudo retrospectivo, através de analise de prontuários. Resultados: Dos 31 pacientes avaliados, houve fechamento da perfura o em 24 (80%) e melhora da audi o com redu o ou fechamento do gap condutivo em 60% e 26,7% respectivamente. Discuss o: A taxa de sucesso da cirurgia foi satisfatória, sendo similar à encontrada na literatura, sendo que fatores como idade, presen a de patologia uni ou bilateral e tamanho da perfura o n o foram fatores determinantes deste sucesso cirúrgico. Conclus o: A timpanoplastia realizada por residentes do 2o ano da residência mostrou resultados satisfatórios tanto cirúrgicos quanto audiométricos.
WOOD HEMICELLULOSE/CHITOSAN-BASED SEMI-INTERPENETRATING NETWORK HYDROGELS: MECHANICAL, SWELLING AND CONTROLLED DRUG RELEASE PROPERTIES
Muzaffer Ahmet Karaaslan,Mandla A. Tshabalala,Gisela Buschle-Diller
BioResources , 2010,
Abstract: The cell wall of most plant biomass from forest and agricultural resources consists of three major polymers, cellulose, hemicellulose, and lignin. Of these, hemicelluloses have gained increasing attention as sustainable raw materials. In this study, novel pH-sensitive semi-IPN hydrogels based on hemicelluloses and chitosan were prepared using glutaraldehyde as the crosslinking agent. The hemicellulose isolated from aspen was analyzed for sugar content by HPLC, and its molecular weight distribution was determined by high performance size exclusion chromatography. Results revealed that hemicellulose had a broad molecular weight distribution with a fair amount of polymeric units, together with xylose, arabinose, and glucose. The effects of hemicellulose content on mechanical properties and swelling behavior of hydrogels were investigated. The semi-IPNs hydrogel structure was confirmed by FT-IR, X-ray study, and the ninhydrin assay method. X-ray analysis showed that higher hemicellulose contents yielded higher crystallinity. Mechanical properties were mainly dependent on the crosslink density and average molecular weight between crosslinks. Swelling ratios increased with increasing hemicellulose content and were high at low pH values due to repulsion between similarly charged groups. In vitro release study of a model drug showed that these semi-IPN hydrogels could be used for controlled drug delivery into gastric fluid.
Implantable Prosthesis of Osseous Conduction (BAHA): Case Report
Pedriali, Izabella Vince Garcia,Buschle, Maurico,Mendes, Rita de Cássia,Ataíde, André Luiz
International Archives of Otorhinolaryngology , 2011,
Abstract: Introduction: The implantable prosthesis of osseous conduction (BAHA) is deemed to be an excellent option in the auditory rehabilitation of patients with conductive and mixed hearing loss, unilaterally or bilaterally, and unilateral sensorineural hearing loss. It has been a good advantage over the conservative bone conduction apparatus and those of individual sound-amplifier apparatus (ISAA), when their usage becomes unfeasible because of chronic otitis externa, which has a hard clinic control. Objective: To introduce the first BAHA case performed in Brazil, as duly authorized by ANVISA (National Agency for Sanitary Surveillance), to rehabilitate the mixed hearing loss with occurrences of chronic otitis externa. Method: 50-year-old female patient with right-ear moderate and left-ear severe hearing loss, bilateral tinnitus derived from otosclerosis, was submitted to 04 surgeries of stapedotomy and unable to use ISAA as a result of otorrhea and bilateral otalgia. The medical and audiological evaluation indicated the benefit of using BAHA. Having surgery been performed and BAHA implemented, the patient showed a significant improvement in audiometric thresholds, speech perception and distinction, as well as she declared to be extremely satisfied with the esthetic factor. Final commentaries: BAHA surgical process is safe, simple and swift, thus providing excellent audiological results and a higher degree of satisfaction to patients.
Prótese Implantável de Condu o óssea (BAHA): Relato de Caso
Pedriali, Izabella Vince Garcia,Buschle, Maurico,Mendes, Rita de Cássia,Ataíde, André Luiz
Arquivos Internacionais de Otorrinolaringologia , 2011,
Abstract: Introdu o: A Prótese Implantável de Condu o óssea (BAHA) consiste em uma excelente op o na reabilita o auditiva de pacientes com perda auditiva condutiva e mista uni ou bilateral, e sensorioneural unilateral. Tem sido uma alternativa vantajosa sobre os aparelhos de condu o óssea convencionais e os aparelhos de amplifica o sonora individuais (AASI) quando o uso dos mesmos fica impossibilitado pela presen a de otite externa cr nica de difícil controle clínico. Objetivo: Apresentar o primeiro caso de BAHA realizado no Brasil, após a autoriza o da ANVISA, para a reabilita o da perda auditiva mista com episódios de otite externa cr nica. Método: Paciente do sexo feminino, 50 anos, com perda auditiva de grau moderado à direita e severo à esquerda, zumbido bilateral, decorrente de otosclerose, submetida a quatro cirurgias de estapedotomia e com impossibilidade de uso de AASI devido a otorreia e otalgia bilateral. A avalia o médica e audiológica indicaram o benefício do BAHA. Realizada a cirurgia e implanta o do sistema BAHA, a paciente apresentou melhora significativa nos limiares audiométricos, na percep o e discrimina o da fala, além de relatar extrema satisfa o relacionada ao fator estético. Comentários Finais: O processo cirúrgico do BAHA é seguro, simples e rápido, proporcionando excelentes resultados audiológicos e alto grau de satisfa o por parte dos pacientes.
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