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Search Results: 1 - 10 of 208457 matches for " L. Capozza "
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Hacia un diagnóstico antropométrico de las osteopenias y un diagnóstico biomecánico de las osteoporosis
Cointry,G. R.; Capozza,R. F.; Ferretti,J.L.; Frost,H. M.;
Medicina (Buenos Aires) , 2003,
Abstract: the current (metabolic) conception of bone-weakening diseases regards bone strength as determined by a systemically-controlled ?mineralized mass? which grows until it reaches a peak and then is lost at individually-specific rates. this concept disregards bone biomechanics. skeletons are structures, it reaches of which depends on the stiffness and the spatial distribution rather than the volume of the calcified material. rather than allowing a systemic regulation of their "mass" as a way to optimize their strength, bones autocontrol their stiffness by orienting bone formation and destruction as locally determined by the directional sensing, by osteocytes, of the strains caused by mechanical usage (gravity, muscle contractions). bone mass and strength are just side products of that control. endocrine-metabolic systems modulate non-directionally the work of bone cells as required for achieving a mineral equilibrium, despite the biomechanical controls, and can determine osteopenias and osteoporoses. osteoporoses are not "intense osteopenias? (as per the current who's conception) but "osteopenic bone fragilities? (as recently stated by the nih). the diagnosis of osteopenia is an anthropometric problem that can be solved densitometrically; but that of bone fragility is a biomechanical matter that requires evaluation of bone material's stiffness and distribution by other means ("resistometry"). for therapeutic purposes, osteopenias and osteoporoses should be also evaluated according to the relationship between bone mass or strength and muscle mass or strength in order to distinguish between "mechanical" (disuse) and "metabolic" etiologies (intrinsic bone lesion, or systemic disequilibrium), in which the bone / muscle proportionalty tends to remain normal or to deteriorate, respectively.
Hacia un diagnóstico antropométrico de las osteopenias y un diagnóstico biomecánico de las osteoporosis
G. R. Cointry,R. F. Capozza,J.L. Ferretti,H. M. Frost
Medicina (Buenos Aires) , 2003,
Abstract: La concepción corriente (metabólica) de las osteopatías fragilizantes supone que la resistencia ósea está determinada por una "masa mineralizada" endocrinamente controlada, que crece hasta alcanzar un pico y luego se pierde con diferente velocidad según el individuo. Esta idea ignora la Biomecánica Osea. Esa masa es el sustrato de una estructura, cuya rigidez no depende del volumen, sino de la rigidez intrínseca y de la disposición espacial del material mineralizado que la compone. Los huesos no optimizan su resistencia como resultado de una regulación sistémica de su masa. Los huesos autocontrolan su rigidez (única variable esquelética controlada) orientando espacialmente la formación y la destrucción óseas en función del sensado direccional osteocítico de las deformaciones usuales (gravedad, contracciones musculares). La resistencia y la masa ósea son productos colaterales no-regulados de ese control. Los sistemas endocrino-metabólicos modulan en forma no-direccional el trabajo celular óseo en función del equilibrio mineral, a expensas del control biomecánico óseo, y pueden determinar osteopenias y osteoporosis. Las osteoporosis no son "osteopenias intensas" (concepto de la OMS), sino "osteopenias fragilizantes" (concepto del NIH). El diagnóstico de osteopenia es antropométrico, y puede hacerse densitométricamente; pero el de fragilidad ósea es biomecánico, y requiere evaluar la rigidez y la distribución del material calcificado por otros medios ("resistometría"). Por razones terapéuticas, las osteopenias y osteoporosis deben a su vez evaluarse en función de la proporción entre la masa o la resistencia ósea y la masa o la fuerza muscular del individuo, para distinguir entre etiologías "mecánicas" (desuso), en las que la proporcionalidad hueso / músculo tiende a mantenerse, y "metabólicas" (lesión ósea intrínseca, o desequilibrio sistémico), en las cuales tiende a reducirse. The current (metabolic) conception of bone-weakening diseases regards bone strength as determined by a systemically-controlled mineralized mass which grows until it reaches a peak and then is lost at individually-specific rates. This concept disregards bone biomechanics. Skeletons are structures, it reaches of which depends on the stiffness and the spatial distribution rather than the volume of the calcified material. Rather than allowing a systemic regulation of their "mass" as a way to optimize their strength, bones autocontrol their stiffness by orienting bone formation and destruction as locally determined by the directional sensing, by osteocytes, of the strains caused by m
Modification of the sting procedure for vesicoureteral reflux: ureteral repositioning and injection
Capozza,N.; Caione,P.;
Archivos Espa?oles de Urología (Ed. impresa) , 2008, DOI: 10.4321/S0004-06142008000200021
Abstract: objetive: over the past 20 years endoscopic treatment (et) of vesicoureteral reflux (vur) has changed the algorithm of reflux management. we describe a modification of the standard subureteral injection (sting) that has contributed to the increased success rate of this procedure. methods: between january 2006 and december 2006 192 children, 5 months to 10 years old (mean age 2.8 years) underwent endoscopic treatment for vur, with injection of dextranomer/hyaluronic acid copolymer (dx/ha). standard sting procedure was used in 165 patients (235 ureters). a modified sting procedure, here described as "ureteral repositioning and injection" (uri) was used in 27 patients (38 ureters). in the uri technique, the needle was inserted as for standard sting; subsequently the distal part of the ureter was raised and levered towards the lumen of the bladder; dx/ha was then injected. renal/bladder ultrasound was performed 1 month after treatment and a voiding cystourethrogram (vcug) at 4-6 months. results: after a single injection the vcug showed no reflux in 203 ureters of sting group (86%) and in 34 ureters of uri group (91%). mean injected volume of dx/ha was 0.7 ml (0.3 - 1.8 ml) for sting and 0.4 ml (0.3 - 0.8 ml) for uri. conclusion: the modified sting we have proposed, presents some advantages. it is very easy to perform and needs less material to inject. the ureteral repositioning into the bladder, with the support of the implanted material, may reconstruct a true flap-valve mechanism, without the risk of ureteral obstruction.
"Estar-aí-para-outros" como participa o da realidade de Cristo: sobre a Eclesiologia de Dietrich Bonhoeffer
Appel, Kurt,Capozza, Nicoletta
Teocomunica??o , 2006,
Abstract: A Eclesiologia em Dietrich Bonhoeffer é vida, reflex o e vida de novo. Revela-se em suas teses de doutorado e habilita o, na sua prática de professor na Universidade de Berlim, como pastor em Londres e sua atua o ecumênica, na decis o como Igreja Confessante, na forma o de pastores e no livro sobre o seguimento, na ilegalidade, na conspira o contra Hitler, na pris o, nas cartas da pris o e no esbo o para a ética, finalmente com o martírio. Despojamento, autonomia, responsabilidade, representa o vicária de Cristo, como "ser-para-outros" e liturgia conseqüente, unindo a o e ora o, caracterizam o ser da Igreja. Die Ekklesiologie Bonhoeffers entstammt seinem Leben, spiegelt sich in seinen Werken und ist weiterhin sein Leben. Seine Doktorarbeit und Habilitationsschrift widmen sich dem Thema, ebenso wie seine T tigkeit als Professor an der Universit t, dann als Pfarrer in London und gleichzeitiges Engagement in der kumene, und wieder in Deutschland, bei der Entscheidung zur Bekennenden Kirche, in seiner T tigkeit als Prediger Ausbilder, selbst in der Illegalit t, bei der Verschw hrung gegen Hitler, im Gef ngnis, in den Briefen aus dem Gef ngnis, den Entwurf einer Ethik und schliesslich das Martyrium. Einfaches Leben, Selbstst ndigkeit, Verantwortung, Stellvertretung Christi als, Für-Andere-Dasein“ und konsequente Liturgie, als Einheit zwischen Beten und Handeln, kennzeichnen das kirchliche Dasein. $$bger
Endoscopic treatment of vesicoureteral reflux in the previously reimplanted ureter: technical aspects and results
Capozza,Nicola; Nappo,Simona; Caione,Paolo;
Archivos Espa?oles de Urología (Ed. impresa) , 2008, DOI: 10.4321/S0004-06142008000200020
Abstract: objectives: to assess the feasibility and results of the endoscopic treatment of vesicoureteral reflux (vur) after a failed ureteral reimplantation. methods: from january 1996 to october 2006, 28 patients underwent endoscopic treatment for vur grade ii to v persisting after open ureteral reimplantation. vur was bilateral in 11 patients, for a total of 39 ureteral units (uu) treated. the endoscopic treatment was performed 1 to 7 years after surgery (average 2.5 years). dextranomer/hyaluronic acid copolymer (dx/ha) was used as injectable material. the amount of injected material ranged from 0.5 to 2.8 ml (average: 1.2 ml). some technical refinements were required to increase the success of the procedures. patients were followed up from 2.5 to 17 years. voiding cystourethrogram (vcug) was performed at 6 months and mag3 renal scan with voiding phase at 24 months. results were compared with the outcome of the endoscopic treatment in patients treated by the same surgeons for primary vur, matched for grade (control group). results: all treatments were performed as one-day procedure. no complications were observed. success was achieved in 22/28 patients (78.5%) and in 30/39 uu (76.9 %) after failed ureteral reimplantation. no significant difference in success rate was found from the control group (p= ns). conclusions: endoscopic treatment of vur after a failed reimplantion can be a challenging procedure, for a skilled endoscopists. nonetheless it can achieve successful results in a high percentage of patients with minimal morbidity and a minimal invasiveness; it should thus be recommended for these patients.
La représentation sociale du leadership
Capozza, Dora,Robusto, Egidio,Busetto, G.
Papers on Social Representations , 1999,
Abstract:
A luminosity monitor for the A4 parity violation experiment at MAMI
T. Hammel,P. Achenbach,S. Baunack,L. Capozza,J. Diefenbach,K. Grimm,D. vonHarrach,Y. Imai,E. Kabuss,R. Kothe,J. H. Lee,A. LopesGinja,F. E. Maas,A. SanchezLorente,E. Schilling,G. Stephan,C. Weinrich,I. Altarev
Physics , 2005, DOI: 10.1016/j.nima.2006.03.028
Abstract: A water Cherenkov luminosity monitor system with associated electronics has been developed for the A4 parity violation experiment at MAMI. The detector system measures the luminosity of the hydrogen target hit by the MAMI electron beam and monitors the stability of the liquid hydrogen target. Both is required for the precise study of the count rate asymmetries in the scattering of longitudinally polarized electrons on unpolarized protons. Any helicity correlated fluctuation of the target density leads to false asymmetries. The performance of the luminosity monitor, investigated in about 2000 hours with electron beam, and the results of its application in the A4 experiment are presented.
A high power liquid hydrogen target for the Mainz A4 parity violation experiment
I. Altarev,E. Schilling,S. Baunack,L. Capozza,J. Diefenbach,K. Grimm,Th. Hammel,D. vonHarrach,Y. Imai,E. M. Kabuss,R. Kothe,J. H. Lee,A. LopesGinja,F. E. Maas,A. SanchezLorente,G. Stephan,C. Weinrich
Physics , 2005, DOI: 10.1016/j.nima.2006.03.022
Abstract: We present a new powerful liquid hydrogen target developed for the precise study of parity violating electron scattering on hydrogen and deuterium. This target has been designed to have minimal target density fluctuations under the heat load of a 20$\mu$A CW 854.3 MeV electron beam without rastering the electron beam. The target cell has a wide aperture for scattered electrons and is axially symmetric around the beam axis. The construction is optimized to intensify heat exchange by a transverse turbulent mixing in the hydrogen stream, which is directed along the electron beam. The target is constructed as a closed loop circulating system cooled by a helium refrigerator. It is operated by a tangential mechanical pump with an optional natural convection mode. The cooling system supports up to 250 watts of the beam heating removal. Deeply subcooled liquid hydrogen is used for keeping the in-beam temperature below the boiling point. The target density fluctuations are found to be at the level 10$^{-3}$ at a beam current of 20 $\mu$A.
INTERACCIóN ENTRE LA NUTRICIóN Y EL CONTROL BIOMECáNICO DE LA ESTRUCTURA óSEA
Ferretti,José Luis; Capozza,Ricardo F.; Cointry,Gustavo R.;
Revista chilena de nutrición , 2003, DOI: 10.4067/S0717-75182003000200005
Abstract: new developments in osteology are showing a high impact on the interpretation of some nutritional aspects of the pathophysiology, diagnosis and treatment of the bone-loosing or bone-weakening disease. they concern chiefly with 1, the different levels of biological complexity of the skeletons; 2, the true determinant factors of the biomechanical properties of bone; 3, the way the bones built-up themselves, 4, the biological control of the biomechanical efficiency of bone structure; 5, the effects of the mechanical (directional) environment on the expression of the genetical determination of bone structure, and 6, the interference of systemic (non-directional), endocrine-metabolic factors on the biomechanical control of bone stiffness and strength. an overview of those matters is provided, focused on the necessary background for the interpretation of the role of nutrition in bone physiology and pathophysiology, and the nutritional interferences with the corresponding mechanisms
La représentation sociale de l'argent
Capozza, Dora,Robusto, Egidio,Squarza, Rita,De Carlo, Nicola, A.
Papers on Social Representations , 1995,
Abstract:
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