Fe-57 Mössbauer and Mo K-EXAFS Investigations of MoxFe3-xO4, an Interesting Mixed-Valent Oxide System

Ferrites of the formula MoxFe3-xO4, prepared by a soft-chemistry route, show mixed valence states of both iron and molybdenum cations. Mössbauer studies show that Fe2+ and Fe3+ ions are present on both the A and B sites, giving Fe an average oxidation state between 2+ and 3+. Molybdenum is present in the 3+ and the 4+ states on the B sites. The presence of Mo in the 3+ state has been established by determining the Mo3+-O distance (2.2 Å), for the first time, by Mo K-EXAFS. The mixed valence of Fe on both the A and B sites and of Mo on the B sites is responsible for the fast electron transfer between the cations. All the Mössbauer parameters including the line width show a marked change at a composition (x ? 0.3) above which the concentration of Fe2+A increases rapidly.

Mossbauer study of La1-xCaxMn1-y (57)FeyO(3) with x = 0, 0.25; y=0.01

Temperature dependent Mossbauer measurements are done on the samples of La1- xCaxMn1-y (FeyO3)-Fe-57 with x=0 and 0.25, and y=0.01. With decreasing temperature, the specimen with x=0.25 shows a paramagnetic to ferromagnetic transition around 175 K. In the specimen x=0.0, the temperature dependence of both the center shift (delta) and the recoilless fraction (f) can be fitted very well with the Debye theory with a theta(D)=320+/-50 K. But for the specimens with x=0.25, f and delta show distinct deviations from the Debye behavior in the temperature range in which the resistivity shows a sharp decrease. Dips observed in both the f and delta around the transition temperature suggest that the Jahn-Teller distortion observed in these systems is dynamic in nature.

HLA-B*57 and Gender Influence the Occurrence of Tuberculosis in HIV Infected People of South India

Background. Substantial evidence exists for HLA and other host genetic factors being determinants of susceptibility or resistance to infectious diseases. However, very little information is available on the role of host genetic factors in HIV-TB coinfection. Hence, a longitudinal study was undertaken to investigate HLA associations in a cohort of HIV seropositive individuals with and without TB in Bangalore, South India. Methods. A cohort of 238 HIV seropositive subjects were typed for HLA-A, B, and DR by PCR-SSP and followed up for 5 years or till manifestation of Tuberculosis. HLA data of 682 HIV Negative healthy renal donors was used as control. Results. The ratio of males and females in HIV cohort was comparable (50.4% and 49.6%). But the incidence of TB was markedly lower in females (12.6%,) than males (25.6%). Further, HLA-B* 57 frequency in HIV cohort was significantly higher among females without TB (21.6%, 19/88) than males (1.7%, 1/59); P = 0.0046; OR = 38. CD4 counts also were higher among females in this cohort. Conclusion. This study suggests that HIV positive women with HLA-B* 57 have less occurrence of TB as compared to males.

Prudentia Iuris, 2003, n° 57 (número completo)

Contenido: Editorial – Respuestas institucionales y políticas ante la macrocriminalidad: La naturaleza económica de la criminalidad organizada / Andrea Castaldo – Blanqueo de capitales : desde la represión del delito a la prevención / María José Meinke – Globalización y derecho penal / Luis Flávio Gomes – La nueva política criminal intimidatoria e inocuizadora : el caso de la seguridad ciudadana en Perú / Percy García Cavero – La respuesta al terrorismo político en Italia / Mauricio Landi – Réplica francesa al terrorismo y al crimen organizado / Serge Leteur – El debate sobre la constitucionalidad de las leyes 23.492 y 23.521 / Miguel M. Padilla – Derechos fundamentales y constitucionalismo penal / Carlos Alberto Mahiques – El estatuto de Roma y el principio de legalidad en el Derecho Penal internacional / Juan Manuel Gramajo – Actualizaciones en Derecho Penal: Acerca de la responsabilidad de la persona jurídica en el Derecho Italiano / Mauro Ronco – La Corte suprema y la morosidad del proceso penal / Francisco D’Albora – El secreto profesional médico / Fernando Mario Caunedo ; Manuel Gorostiaga – La Legislación Argentina ante los delitos complejos / Luis Enrique Velasco – In Memoriam -- Recensiones

Sapientia, 1960, Vol. XV, nº 57 (número completo)

Contenido: La actividad especulativa y práctica del espíritu / Octavio N. Derisi – Valor y situación en Louis Lavelle / Guido Soaje Ramos – Naturaleza, causas y ámbito de la cultura / Octavio N. Derisi – Notas y comentarios -- Bibliografía

Efecto de la fertilización nitrogenada y la cantidad de semilla de siembra sobre las características del sorgo granífero E-57

Debido a que las cantidades de semilla por manzana así como las cantidades fertilizante afectan de modo diferente a las variedades de sorgo granifero, se planifico el presente trabajo con el fin de obtener información acerca del efecto de cinco cantidades de semilla por hectárea y cinco niveles de nitrógeno en diferentes características del sorgo granifero E-57, bajo las condiciones de suelo de "Los Altos", Masaya. Los niveles de nitrógeno estudiadas fueron 70, 87, 5, 105, 122.5 y 140 kilogramos por hectárea. Las densidades de siembra fueron 16, 17.75, 19.5, 21.5 y 23 kilogramos de semilla por hectárea. El diseño experimental que se uso fue el de cuadrado doble con distribución de tratamientos en el campo de bloques completos al azar con cuatro repeticiones, conteniendo cada bloque 13 tratamientos. Cada parcela consto de 4 surcos de 6 metros de largo separados entre si 0.35 metros. La fuente de nitrógeno usada fue Urea 46 por ciento , la variedad usada fue E-57, los resultados del experimento pueden resumirse asi: 1). Los porcentajes de germinacion fueron sensiblemente bajos. 2). La enfermedad causada por el patógeno Helminthosporium sp. no causo ningún efecto en la producción de grano. 3) El numero de días a flor y la altura de plantas no fueron afectados por ningún tratamiento. 4) La variedad Dekalb E-57 resulto ser resistente al acame. 5) El numero de panojas a la cosecha se incrementa a medida que aumenta la densidad de siembra, hasta el limite de 21.5 kilogramos por hectárea en el cual comienza a decrecer. 6) Los niveles óptimos de los factores estudiados para obtener el mayor rendimiento de grano y beneficio, son las de 105 kilogramos de nitrógeno y 19.5 kilogramos de semilla por hectarea. Con semilla de 72 por ciento de germinacion.

第57届国际宇航大会会议介绍

1概况 第57届国际宇航大会于2006年10月2—6日在西班牙瓦兰西亚召开，10月1日还召开了国际宇航科学院院士会和国际宇航学会各委员会会议．会议参加人数超过2000人，开幕式大礼堂座无虚席．这次会议的主题是“开创更贴近人民的空间事业（bringing space closer to people）”．大会在瓦兰西亚的大展览馆召开，群众与代表交混．除大会会场外，所有分会会场都是用木板临时安装的，会场条件简单．

Régimen jurídico de las lenguas y reconocimiento de la diversidad lingüística en el Tratado por el que se establece una Constitución para Europa

The territory of the European Union is made up of a rich and wide-ranging universe of languages, which is not circumscribed to the «State languages». The existence of multilingualism is one of Europe’s defining characteristics and it should remain so in the constantly evolving model of Europe’s political structure. Nonetheless, until now, the official use of languages has been limited to the «State languages» and has been based on a concept of state monolingualism that has led to a first level of hierarchization among the languages of Europe. This has affected the very concept of European language diversity. The draft of the treaty establishing a European Constitution contains various language-related references that can be grouped in two major categories: on the one hand, those references having to do the constitutional status of languages, and on the other, those regarding the recognition of European language diversity. Both issues are dealt with in this article. In analyzing the legal regime governing languages set forth in the draft of the constitutional treaty, we note that the draft is not based on the concept of the official status of languages. The language regulation contained in the draft of the constitutional treaty is limited in character. The constitutional language regime is based on the concept of Constitutional languages but the official status of languages is not governed by this rule. The European Constitution merely enunciates rights governing language use for European citizens vis-à-vis the languages of the Constitution and refers the regulation of the official status of languages to the Council, which is empowered to set and modify that status by unanimous decision. Because of its broad scope, this constitutes a regulatory reservation. In the final phase of the negotiation process a second level of constitutional recognition of languages would be introduced, linked to those that are official languages in the member states (Catalan, Basque, Galician, etc.). These languages, however, would be excluded from the right to petition; they would constitute a tertium genus, an intermediate category between the lan guages benefiting from the language rights recognized under the Constitution and those other languages for which no status is recognized in the European institutional context. The legal functionality of this second, intermediate category will depend on the development of standards, i.e., it will depend on the entrée provided such languages in future reforms of the institutional language regime. In a later section, the article reflects on European Union language policy with regard to regional or minority languages, concluding that the Union has not acted in accordance with defined language policy guidelines when it has been confronted, in the exercise of its powers, with regional or minority languages (or domestic legislation having to do with language demands). The Court of Justice has endeavoured to resolve on a case by case basis the conflicts raised between community freedoms and the normative measures that protect languages. Thus, using case law, the Court has set certain language boundaries for community freedoms. The article concludes by reflecting on the legal scope of the recognition of European language diversity referred to in Article II-82 of the European Constitution and the possible measures to implement the precept that might constitute the definition of a true European language policy on regional or minority languages. Such a policy has yet to be defined.

激光熔覆大厚度Fe_(57)Co_8Ni_8Zr_(10)Si_4B_(13)非晶表层及其微结构研究

利用激光熔覆制备出1.2mm厚的Fe_(57)Co_8Ni_8Zr_(10)Si_4B_(13)大厚度非晶表层。用XRD,ES,TEM,DSC及硬度对获得的非晶表层进行了多种分析，研究了非晶合金表层的微结构与非晶形成能力。初步探讨了大厚度非晶表层的形式机制。

Cruise no. 2 of the M/V N.B. Scofield for 1957, 57S2-Albacore. Cruise report 57-S-2

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Cruise 57-S-1 of the N.B. Scofield

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