El aporte de Samir Amin al análisis del Sistema Mundial Capitalista

El trabajo analiza parte de la producción bibliográfica de Amin en dos etapas. La primera comprende obras de la década de 1960 y 1970, donde se analiza las características del sistema mundial capitalista a lo largo de sus diferentes faces desde su génesis. La segunda etapa comprende parte de sus obras a partir de la década de 1990, analizando la última etapa del sistema capitalista mundial. A lo largo de ambas partes se analiza las condiciones políticas y económicas que determinan la posición de los países periféricos en el sistema capitalista mundial.

La desconexión de los circuitos productivos en Argentina

La pregunta más general o problema que se aborda en este trabajo de tesina puede formularse como sigue: cuáles son los determinantes económicos y políticos que han llevado a la conocida situación de desolación de numerosas ciudades-pueblos en Argentina. Todo nuestro trabajo está guiado entonces por la siguiente hipótesis: existe una relación de determinación entre la implementación de las políticas neoliberales en la Argentina - las cuales están imbricadas con una nueva forma de acumulación y reproducción del capital- y el fenómeno de desconexión de ciudades-pueblos de sus respectivos circuitos productivos. En síntesis, uno de nuestros argumentos centrales es que las políticas económicas instauradas a partir de 1976 y consolidadas definitivamente en 1991 fueron coherentes con las nuevas modalidades de acumulación del capital, las cuales dieron por caducas o nulas ciertas actividades económicas, produciéndose una progresiva destrucción de las economías regionales.

La divina adoratriz de Amón : Evolución ideológica y política de la institución desde el Reino Nuevo hasta inicios de la Baja Época

Evolución ideológica de la institución de la divina adoratriz en el antiguo Egipto. Una visión del papel activo de la mujer en la historia antigua.

Estela de Didia, hijo de Hatiay, Superintendente de los Escribas de Amón

Fil: Andrade Marambio, Federico Guillermo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Estela de Didia, hijo de Hatiay, Superintendente de los Escribas de Amón

Fil: Andrade Marambio, Federico Guillermo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Estela de Didia, hijo de Hatiay, Superintendente de los Escribas de Amón

Fil: Andrade Marambio, Federico Guillermo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

José Sarney de pequeno tumor nos rins.No comando, o mesmo doutor Samir Arap.

Ricardo Soares.

Desenvolvimento do Conhecimento Situacional do Ciberespaço na Marinha/AMN e a sua contribuição no processo de tomada de decisão

Com a crescente dependência do ciberespaço, considerado o quinto domínio, é necessário que, para garantir a segurança dos sistemas de informação, as organizações civis como o Centro Nacional de Cibersegurança ou o Gabinete Nacional de Segurança e as organizações militares como o Estado-Maior General das Forças Armadas ou o Centro de Ciberdefesa, detenham um sólido conhecimento situacional do mesmo. Para alcançar este objetivo é fundamental que estas mesmas organizações colaborem de modo a desenvolver uma capacidade de prevenir e recuperar de ataques que possam ocorrer nesse domínio através de uma observação contínua do mesmo contribuindo, assim, para a sua proteção, prevenção, mitigação, resposta e para a sua recuperação. Deste modo, uma vez que os sistemas de informação são mais vulneráveis por estarem ligados em rede, apresentam potenciais riscos para as organizações pondo em causa a sua segurança. Por conseguinte, antecipar os eventuais problemas que poderão ocorrer nesses sistemas contribui para o desenvolvimento e implementação de medidas para proteger a informação. Sendo assim, e conforme outras organizações, também a Marinha está ligado em rede, pelo que está sujeita a este tipo de ameaça. Com o presente trabalho, pretende-se abordar o tema do Conhecimento Situacional do Ciberespaço e mostrar a sua importância para o tema através da compreensão do modo como pode influenciar a condução das missões atribuídas às UN bem como as unidades em terra. Pretende-se identificar se existe uma organização a bordo das UN que, em articulação com comandos em terra, possa garantir que, num determinado teatro de operações, o que se passa no ciberespaço de interesse para a missão, tanto a nível tático como a nível operacional, é acionável. Pretende-se, ainda, em alinhamento com o conceito de capacidade caracterizar o que é que a Marinha tem desenvolvido neste contexto relativamente a doutrina, organização, estrutura, formação assim como treino.

Evaluation of the effects of ozone therapy in the treatment of intra-abdominal infection in rats

INTRODUCTION: The antibacterial effect of ozone (O3) has been described in the extant literature, but the role of O3 therapy in the treatment of certain types of infection remains controversial. OBJECTIVES: To evaluate the effect of intraperitoneal (i.p.) O3 application in a cecal ligation/puncture rat model on interleukins (IL-6, IL-10) and cytokine-induced neutrophil chemoattractant (CINC)-1 serum levels, acute lung injury and survival rates. METHODS: Four animal groups were used for the study: a) the SHAM group underwent laparotomy; b) the cecal ligation/puncture group underwent cecal ligation/puncture procedures; and c) the CLP+O2 and CLP+O3 groups underwent CLP+ corresponding gas mixture infusions (i.p.) throughout the observation period. IL-6, CINC-1 and IL-10 concentrations were determined by enzyme-linked immunosorbent assay (ELISA). Acute lung injury was evaluated with the Evans blue dye lung leakage method and by lung histology. P<0.05 was considered significant. RESULTS: CINC-1 was at the lowest level in the SHAM group and was lower for the CLP+O3 group vs. the CLP+O2 group and the cecal ligation/puncture group. IL-10 was lower for the SHAM group vs. the other three groups, which were similar compared to each other. IL-6 was lower for the SHAM group vs. all other groups, was lower for the CLP+O3 or CLP+O2 group vs. the cecal ligation/puncture group, and was similar for the CLP+O3 group vs. the CLP+O2 group. The lung histology score was lower for the SHAM group vs. the other groups. The Evans blue dye result was lower for the CLP+O3 group vs. the CLP+O2 group and the cecal ligation/puncture group but similar to that of the SHAM group. The survival rate for the CLP+O3 group was lower than for the SHAM group and similar to that for the other 2 groups (CLP and CLP+O2). CONCLUSION: Ozone therapy modulated the inflammatory response and acute lung injury in the cecal ligation/puncture infection model in rats, although there was no improvement on survival rates.

Effect of some essential oils on in vitro methane emission

The objectives of this study were to characterise four essential oils (EO) chemically and to evaluate their effect on ruminal fermentation and methane emission in vitro. The investigated EO were isolated from Achillea santolina, Artemisia judaica, Schinus terebinthifolius and Mentha microphylla, and supplemented at four levels (0, 25, 50 and 75 l) to 75ml of buffered rumen fluid plus 0.5 g of substrate. The main components of the EO were piperitone (49.1%) and camphor (34.5%) in A. judaica, 16-dimethyl 15-cyclooactdaiene (60.5%) in A. santolina, piperitone oxide (46.7%) and cis-piperitone oxide (28%) in M. microphylla, and -muurolene (45.3%) and -thujene (16.0%) in S. terebinthifolius. The EO from A. santolina (at 25 and 50 l), and all levels of A. judaica increased the gas production significantly, but S. terebinthifolius (at 50 and 75 l), A. santolina (at 75 l) and all levels of M. microphylla decreased the gas production significantly in comparison with the control. The highest levels of A. santolina and A. judaica, and all doses from M. microphylla EO inhibited the methane production along with a significant reduction in true degradation of dry matter and organic matter, protozoa count and NH3-N concentration. It is concluded that the evaluated EO have the potential to affect ruminal fermentation efficiency and the EO from M. microphylla could be a promising methane mitigating agent.

Determination of the stability constants of mercury(II) complexes of mixed donor macrobicyclic encapsulating ligands

The reactions of mercury(II) with the mixed donor encapsulating ligands 3,6,16-trithia-6,11,19-triazabicyclo[6.6.6]icosane (AMN(3)S(3)sar) and 1-amino-8-methyl-6,19-dithia-3,10,13,16-tetraazabicyclo[6.6.6]icosane (AMN(4)S(2)sar) have been studied. NMR ligand-ligand competition experiments with the ligands 1,4,8,11-tetraazaeyclotetradecane ([14]aneN(4)), 1-thia-4,7,10-triazacyclododecane ([12]aneN(3)S) and ethylenediaminetetraacetic acid (EDTA) with AMN(3)S(3)sar and Hg(II) indicated that [14]aneN(4) would be an appropriate competing ligand for the, determination of the Hg(II) stability constant. Calculations indicated the ratio of concentrations of AMN3S3sar, [14]aneN(4) and Hg(II) required for the determination of the stability constant ranged from 1:1:1 to 1:5:1. Refinement of the titration curves yielded log(10)K[Hg(AMN(3)S(3)sar)](2+) = 17.7. A similar competition titration resulted in the determination of the stability constant for the AMN(4)S(2)sar system as log(10)K[Hg(AMN(4)S(2)sar)](2+) = 19.5. The observed binding constants for the mixed N/S donor systems and the hexaaza analogues sar (3,6,10,13,16,19-hexaazabicyclo [6.6.6]icosane) and diamsar (1,8-diamino-3,6,10,13,16,19 -hexazabicyclo [6.6.6] icosane (log(10)K-[Hg(diamsar)](2+) = 26.4; log(10)K[Hg(sar)](2+) = 28.1) differ by approximately ten orders of magnitude. The difference is ascribed not to a cryptate effect but to a mismatch in the Hg-N and Hg-S bond lengths in the N/S systems.

Mid-humeral sentinel lymph node dissection in patients with primary cutaneous malignant melanoma

In rare cases, lymphatic drainage from the malignant melanomas in the upper extremity may follow an unpredictable pattern (outside the axillary nodes), and these aberrant sentinel nodes may represent the only site of regional lymph node metastases. The precise anatomical landmarks and technical aspects of surgical exploration of these aberrant sentinel lymph nodes are rarely described in the literature, including aberrant sentinel mid-humeral lymph nodes. This report describes a step-by-step dissection of the mid-humeral sentinel lymph nodes in two patients with a primary malignant melanoma in the upper extremity, identified by lymphatic mapping. Recognition of precise regional anatomy and following a special surgical technique makes the procedure safe and successful, thus avoiding local complications and allowing a prompt recovery. Melanoma Res 20:138-140 (C) 2010 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.

Spin-orbit mixing and nephelauxetic effects in the electronic spectra of nickel(II)-encapsulating complexes involving nitrogen and sulfur donors

A study of spin-orbit mixing and nephelauxetic effects in the electronic spectra of nickel(II)-encapsulating complexes involving mixed nitrogen and sulfur donors is reported. As the number of sulfur donors is systematically varied through the series [Ni(N6-xSx)](2+) (x = 0-6), the spin-forbidden (3)A(2)g --> E-1(g) and (3)A(2g) --> (1)A(1g) transitions undergo a considerable reduction in energy whereas the spin-allowed transitions are relatively unchanged. The [Ni(diAMN(6)sar)](2+) and [Ni(AMN(5)Ssar)](2+) complexes exhibit an unusual band shape for the (3)A(2g) --> T-3(2g) transition which is shown to arise from spin-orbit mixing of the E spin-orbit levels associated with the E-1(g) and T-3(2g) states. A significant differential nephelauxetic effect also arises from the covalency differences between the t(2g) and e(g) orbitals with the result that no single set of Racah B and C interelectron repulsion parameters adequately fit the observed spectra. Using a differential covalency ligand-field model, the spectral transitions are successfully reproduced with three independent variables corresponding to 10Dq and the covalency parameters f(t) and f(e), associated with the t(2g) and e(g) orbitals, respectively. The small decrease in f(t) from unity is largely attributed to central-field covalency effects whereas the dramatic reduction in f(e) with increasing number of sulfur donors is a direct consequence of the increased metal-ligand covalency associated with the sulfur donors. Covalency differences between the t(2g) and e(g) orbitals also result in larger 10Dq values than those obtained simply from the energy of the (3)A(2g) --> T-3(2g) spin-allowed transition.