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Search Results: 1 - 10 of 12 matches for " Vogelmann "
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Experiencias de acción colectivas en el gremio de la carne de Rosario durante la década del '90
Verónica Vogelmann
Revista Theomai , 2010,
Abstract:
Reconversión productiva y significaciones obreras: Transformaciones en las industrias frigorífica y siderúrgica
Soul,M. Julia; Vogelmann,Verónica;
Intersecciones en antropolog?-a , 2010,
Abstract: labour relations and work process organization underwent important changes in argentina during the past decade in the context of productive restructuring. in this article, the features that this process assumed in argentinian steel and meat industries are analyzed, focusing on the industrial plants of siderar and swift in south zárate, puerto san martín industrial region. the concrete development of the restructuring process is described, the differences and similarities between productive processes and organizational devices at both industrial plants are stressed, and, finally, meanings that workers attribute to the experiences of the restructuring processes are identified. as such, a series of contradictory positions adopted by workers in relation to management projects are pointed out. their attitudes towards new management features are highlighted with the ideas of adaptation and getting used to as opposed to the attitude of implication or getting involved with asked for by enterprises directors.
Reconversión productiva y significaciones obreras: Transformaciones en las industrias frigorífica y siderúrgica Productive Restructuring And Workers' Meanings: Transformations In The Meat And Steel Industries
M. Julia Soul,Verónica Vogelmann
Intersecciones en Antropología , 2010,
Abstract: En Argentina durante las últimas décadas del siglo pasado se profundizaron procesos de reconversión productiva transformando las relaciones laborales y las formas de organización del trabajo. En este artículo se avanza en el análisis de las características que asumen estos procesos en el sector frigorífico y siderúrgico en Argentina, focalizando la atención en las plantas de Swift y SOMISA - Siderar, situadas en la región sur del cordón industrial Zárate - Puerto San Martín. Se describe la dinámica concreta de los procesos de reconversión en dichas plantas. Se establecen diferencias y similitudes entre los procesos productivos y los dispositivos organizacionales de ambas empresas. Finalmente, se identifican las significaciones que construyen los trabajadores de distintas áreas en torno de sus experiencias laborales en el curso de dichos procesos. Se se alan una serie de posiciones contradictorias por parte de los trabajadores a los proyectos empresarios destacándose las nociones de adaptación o acostumbramiento como las principales formas en que ellos caracterizan su adscripción a las nuevas pautas productivas; en detrimento de posiciones de implicación o involucramiento. Labour relations and work process organization underwent important changes in Argentina during the past decade in the context of productive restructuring. In this article, the features that this process assumed in Argentinian steel and meat industries are analyzed, focusing on the industrial plants of Siderar and Swift in south Zárate, Puerto San Martín industrial region. The concrete development of the restructuring process is described, the differences and similarities between productive processes and organizational devices at both industrial plants are stressed, and, finally, meanings that workers attribute to the experiences of the restructuring processes are identified. As such, a series of contradictory positions adopted by workers in relation to management projects are pointed out. Their attitudes towards new management features are highlighted with the ideas of adaptation and getting used to as opposed to the attitude of implication or getting involved with asked for by enterprises directors.
Intercomparison of atmospheric water vapor soundings from the differential absorption lidar (DIAL) and the solar FTIR system on Mt. Zugspitze
H. Vogelmann, R. Sussmann, T. Trickl,T. Borsdorff
Atmospheric Measurement Techniques (AMT) & Discussions (AMTD) , 2011,
Abstract: We present an intercomparison of three years of measurements of integrated water vapor (IWV) performed by the mid-infrared solar FTIR (Fourier Transform Infra-Red) instrument on the summit of Mt. Zugspitze (2964 m a.s.l.) and by the nearby near-infrared differential absorption lidar (DIAL) at the Schneefernerhaus research station (2675 m a.s.l.). The solar FTIR was shown to be one of the most accurate and precise IWV sounders in recent work (Sussmann et al., 2009) and is taken as the reference here. By calculating the FTIR-DIAL correlation (22 min coincidence interval, 15 min integration time) we derive an almost ideal slope of 0.996 (10), a correlation coefficient of R = 0.99, an IWV intercept of 0.039 (42) mm ( 1.2 % of the mean), and a bias of 0.052 (26) mm ( 1.6 % of the mean) from the scatter plot. By selecting a subset of coincidences with an optimum temporal and spatial matching between DIAL and FTIR, we obtain a conservative estimate of the precision of the DIAL in measuring IWV which is better than 0.1 mm (3.2 % of the mean). We found that for a temporal coincidence interval of 22 min the difference in IWV measured by these two systems is dominated by the volume mismatch (horizontal distance: 680 m). The outcome from this paper is twofold: (1) the IWV soundings by FTIR and DIAL agree very well in spite of the differing wavelength regions with different spectroscopic line parameters and retrieval algorithms used. (2) In order to derive an estimate of the precision of state-of-the-art IWV sounders from intercomparison experiments, it is necessary to use a temporal matching on time scales shorter than 10 min and a spatial matching on the 100-m scale.
Intercomparison of atmospheric water vapor soundings from the differential absorption lidar (DIAL) and the solar FTIR system on Mt. Zugspitze
H. Vogelmann,R. Sussmann,T. Trickl,T. Borsdorff
Atmospheric Measurement Techniques Discussions , 2010, DOI: 10.5194/amtd-3-5411-2010
Abstract: We present an intercomparison of three years of measurements of integrated water vapor (IWV) performed by the mid-infrared solar FTIR instrument on the summit of Mt. Zugspitze (2964 m a.s.l.) and the nearby near-infrared differential absorption lidar (DIAL) at the Schneefernerhaus research station (UFS, 2675 m a.s.l.). The solar FTIR turned out to be one of the most accurate and precise IWV sounders in recent work (Sussmann et al., 2009) and is taken as the reference here. By calculating the FTIR-DIAL correlation (22 min coincidence interval, 15 min integration time) we derive an almost ideal slope of 0.99(1), a correlation coefficient of R = 0.99, an IWV intercept of 0.056(42) mm (1.8% of the mean), and a bias of 0.097(26) mm (3.1% of the mean) from the scatter plot. By selecting a subset of coincidences with an optimum temporal and spatial matching between DIAL and FTIR, we obtain a conservative estimate of the precision of the DIAL in measuring IWV which is better than 0.1 mm (3.2% of the mean). We found that for a temporal coincidence interval of 22 min the difference in IWV measured by these two systems is dominated by the volume mismatch (horizontal distance: 680 m). The outcome from this paper is twofold: (1) The IWV soundings by FTIR and DIAL agree very well in spite of the differing wavelength regions with different spectroscopic line parameters and retrieval algorithms used. (2) In order to derive an estimate of the precision of state-of-the-art IWV sounders from intercomparison experiments, it is necessary to use a temporal matching on the shorter 10-min scale and a spatial matching on the smaller 1-km scale.
Concerted Action of Sphingomyelinase and Non-Hemolytic Enterotoxin in Pathogenic Bacillus cereus
Viktoria M. Doll, Monika Ehling-Schulz, Roger Vogelmann
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0061404
Abstract: Bacillus cereus causes food poisoning and serious non-gastrointestinal-tract infections. Non-hemolytic enterotoxin (Nhe), which is present in most B. cereus strains, is considered to be one of the main virulence factors. However, a B. cereus ΔnheBC mutant strain lacking Nhe is still cytotoxic to intestinal epithelial cells. In a screen for additional cytotoxic factors using an in vitro model for polarized colon epithelial cells we identified B. cereus sphingomyelinase (SMase) as a strong inducer of epithelial cell death. Using single and double deletion mutants of sph, the gene encoding for SMase, and nheBC in B. cereus we demonstrated that SMase is an important factor for B. cereus cytotoxicity in vitro and pathogenicity in vivo. SMase substantially complemented Nhe induced cytotoxicity in vitro. In addition, SMase but not Nhe contributed significantly to the mortality rate of larvae in vivo in the insect model Galleria mellonella. Our study suggests that the role of B. cereus SMase as a secreted virulence factor for in vivo pathogenesis has been underestimated and that Nhe and SMase complement each other significantly to cause full B. cereus virulence hence disease formation.
The GPVI – Fc Fusion Protein Revacept Reduces Thrombus Formation and Improves Vascular Dysfunction in Atherosclerosis without Any Impact on Bleeding Times
Martin Ungerer, Zhongmin Li, Christine Baumgartner, Silvia Goebel, Jasmin Vogelmann, Hans-Peter Holthoff, Meinrad Gawaz, G?tz Münch
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0071193
Abstract: Aims Glycoprotein VI (GPVI) is a key platelet receptor which mediates plaque-induced platelet activation and consecutive atherothrombosis, but GPVI is also involved in platelet-mediated atheroprogression. Therefore, interference in GPVI-mediated platelet activation has the potential to combine short-term and long-term beneficial effects, specificity and safety especially regarding bleeding complications. Methods and Results We investigated the effects of the soluble dimeric GPVI receptor fusion protein, Revacept, an antagonist of collagen-mediated platelet activation, in an animal model of atherosclerosis: twenty week old rabbits, which had been fed on a cholesterol-rich diet for 8 weeks, received Revacept (8 mg/kg) or control twice weekly for 4 weeks. Pharmacokinetics indicated a slight accumulation of the drug in the serum after repeated dosing of Revacept for 3 weeks. A significant improvement of endothelial dysfunction after 0.06 and 0.6 μg/min acetylcholine and a significant decrease of vessel wall thickening were found after Revacept treatment. Accordingly, aortic vessel weight was reduced, and plaque sizes, macrophage and T-cell invasion tended to be reduced in histological evaluations. Bleeding time was determined after tail clipping in mice. Revacept alone or in combination with widely used anti-platelet drugs revealed a high safety margin with no prolongation of bleeding times. Conclusion Repeated doses of Revacept led to a significant improvement of endothelial dysfunction and vascular morphology in atherosclerotic rabbits. Furthermore, no influence of Revacept on bleeding time alone or in combinations with various anti-platelet drugs was found in mice. Thus, the inhibition of collagen-mediated platelet interaction with the atherosclerotic endothelium by Revacept exerts beneficial effects on morphology and vascular function in vivo and seems to have a wide therapeutic window without influencing the bleeding time.
Compressibilidade de um Argissolo Vermelho-Amarelo trafegado e escarificado
Vogelmann, Eduardo Saldanha;Mentges, Marcelo Ivan;Reichert, José Miguel;Rosa, David Peres da;Barros, Cláudia Alessandra Peixoto de;Reinert, Dalvan José;
Ciência Rural , 2012, DOI: 10.1590/S0103-84782012005000004
Abstract: farm machinery wheeling is considered a major source of soil compaction. the use of chisel plow can minimize such effects, but the chisel can cause subsurface compaction. the aim of this study was to evaluate the effect of traffic and is present below the compaction layer thought compressive parameters of soil. the treatments investigated were: no-tillage, no-tillage with additional traffic (traffic intensity of 24.67mg km ha-1), no-tillage chiseling recent implanted, no-tillage with additional traffic and chiseling recent implanted. for the density, void ratio, preconsolidation pressure and coefficient of compressibility determination in the layers 0.0-0.10m, 0.10-0.20m, 0.20-0.30m and 0.30 to 0.40m samples were collected. the treatment no-tillage showed the lowest load support capacity and greater susceptibility to compaction. the traffic intensity of 24.67mg km ha-1 increased bulk density and decreased void ratio until 0.30m depth. the chisel plow did not affect the preconsolidation pressure and coefficient of compressibility of soil layer below the line of action of the chisel tip.
The GPVI-Fc Fusion Protein Revacept Improves Cerebral Infarct Volume and Functional Outcome in Stroke
Silvia Goebel, Zhongmin Li, Jasmin Vogelmann, Hans-Peter Holthoff, Heidrun Degen, Dirk M. Hermann, Meinrad Gawaz, Martin Ungerer, G?tz Münch
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0066960
Abstract: Objectives We examined the effect of Revacept, an Fc fusion protein which is specifically linked to the extracellular domain of glycoprotein VI (GPVI), on thrombus formation after vessel wall injury and on experimental stroke in mice. Background Several antiplatelet drugs for the treatment of myocardial infarction or ischemic stroke with potent anti-ischemic effects have been developed, but all incur a significant risk of bleeding. Methods Platelet adhesion and thrombus formation after endothelial injury was monitored in the carotid artery by intra-vital fluorescence microscopy. The morphological and clinical consequences of stroke were investigated in a mouse model with a one hour-occlusion of the middle cerebral artery. Results Thrombus formation was significantly decreased after endothelial injury by 1 mg/kg Revacept IV, compared to Fc only. 1 mg/kg Revacept IV applied in mice with ischemic stroke immediately before reperfusion significantly improved functional outcome, cerebral infarct size and edema compared to Fc only. Also treatment with 10 mg/kg rtPA was effective, and functional outcome was similar in both treatment groups. The combination of Revacept with rtPA leads to increased reperfusion compared to treatment with either agent alone. In contrast to rtPA, however, there were no signs of increased intracranial bleeding with Revacept. Both rtPA and Revacept improved survival after stroke compared to placebo treatment. Revacept and vWF bind to collagen and Revacept competitively prevented the binding of vWF to collagen. Conclusions Revacept reduces arterial thrombus formation, reduces cerebral infarct size and edema after ischemic stroke, improves functional and prognostic outcome without intracranial bleeding. Revacept not only prevents GPVI-mediated, but probably also vWF-mediated platelet adhesion and aggregate formation. Therefore Revacept might be a potent and safe tool to treat ischemic complications of stroke.
A Key Role for E-cadherin in Intestinal Homeostasis and Paneth Cell Maturation
Marlon R. Schneider,Maik Dahlhoff,David Horst,Benjamin Hirschi,Konrad Trülzsch,Josef Müller-H?cker,Roger Vogelmann,Michael Allg?uer,Markus Gerhard,Sylvia Steininger,Eckhard Wolf,Frank T. Kolligs
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0014325
Abstract: E-cadherin is a major component of adherens junctions. Impaired expression of E-cadherin in the small intestine and colon has been linked to a disturbed intestinal homeostasis and barrier function. Down-regulation of E-cadherin is associated with the pathogenesis of infections with enteropathogenic bacteria and Crohn's disease.
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