Approaches toward (eta(2)-HX) (X = H, SiR (R = Me-3 or Me2Ph), CH3) sigma-complexes of ruthenium

Two new Ru(II)-complexes RuH(Tpms)(PPh3)(2)] 1 (Tpms - (C3H3N2)(3)CSO3, tris-(pyrazolyl) methane sulfonate) and Ru(OTf)(Tpms)(PPh3)(2)] 2 (OTf = CF3SO3) have been synthesized and characterized wherein Ru-H and Ru-OTf are the key reactive centers. Reaction of 1 with HOTf results in the Ru(eta(2)-H-2)(Tpms)(PPh3)(2)]OTf] complex 3, whereas reaction of 1 with Me3SiOTf affords the dihydrogen complex 3 and complex 1 through an unobserved sigma-silane intermediate. In addition, an attempt to characterize the sigma methane complex via reaction of complex 1 with CH3OTf yields complex 2 and free methane. On the other hand, reaction of Ru(OTf)(Tpms)(PPh3)(2)] 2 with H-2 and PhMe2SiH at low temperature resulted in sigma-H-2, 3 and a probable sigma-silane complexes, respectively. However, no sigma-methane complex was observed for the reaction of complex 2 with methane even at low temperature. (C) 2014 Elsevier B. V. All rights reserved.

Variational Approach to the Thomas-Fermi Equation

By the semi-inverse method, a variational principle is obtained for the Thomas-Fermi equation, then the Ritz method is applied to solve an analytical solution, which is a much simpler and more efficient method.

Las escenas espejo en el teatro isabelino : el jardín de Isabel en “La tragedia española” de Thomas Kyd

Resumen: Este trabajo busca demostrar cómo la escena de “El Jardín de Isabel” (acto IV, escena ii) en la obra La tragedia española de Thomas Kyd es un ejemplo de una escena espejo. Inicialmente se observa cómo esta escena está laxamente conectada con el resto de la obra y la misma no sufriría un cambio significativo de ser la escena eliminada; la característica de “prescindible” de ésta, es propia de una escena espejo. La escena del Jardín de Isabel es luego estudiada en profundidad para dejar en evidencia cómo resume la obra y la simboliza. El personaje de Isabel es examinado en detalle, siguiendo una sensibilidad pictórica y, a través de una interpretación temática y simbólica, Isabel es presentada como Piedad, Testigo de Justicia Divina y Venganza. Finalmente el espacio es también analizado como locus amoenus al ser inicialmente un lugar de encuentro de los enamorados y locus eremus luego de la maldición de Isabel. Luego del estudio de estos aspectos de esta escena espejo, se pone en evidencia cómo la misma “refleja” los temas centrales de la obra: la verdad se revela con el tiempo, hay que ser paciente y esperar la justicia divina y, por último, la venganza sólo condena al vengador.

Convenção addicional ao Tratado de 22 de janeiro de 1815, entre os muito altos, e muito poderosos senhores El-Rei do Reino Unido de Portugal, do Brazil, e Algarves, El-Rei do Reino Unido da Grande Bretanha, e Irlanda : feita em Londres pelos Plenipotenciarios de huma e outra Corte em 28 de julho de 1817, e ratificada por ambas

Define ser lícito o tráfico de escravos nos territórios portugueses ao sul do Equador. Ou seja, em Angola e Moçambique.

Tratado de abolição do traffico de escravos em todos os lugares da Costa da África ao Norte do Equador, entre os muito altos, e muito poderosos senhores o Principe Regente de Portugal, e El-Rei do Reino Unido da Grande Bretanha e Irlanda : feito em Vienna pelos Plenipotenciarios de huma e outra Corte em 22 de janeiro de 1815, e ratificado por ambas

Por este tratado, a Inglaterra abre mão da cobrança do restante do empréstimo de 600 mil libras que fizera a Portugal em 1809, a título de indenização.

Phylogeography and non-invasive landscape genetics of the European pine marten ("martes martes" L. 1758) : insights into ancient and contemporary processes shaping genetic variation

283 p. : graf., map.

Restauracion de la ciudad del Salvador, i Baia de Todos-Santos, en la provincia del Brasil :por las armas de Don Philippe IV, el Grande, Rei Catholico de las Espanas i Indias, [et]c. A su Magestad : Don Thomas Tamaio de Vargas, su cronista

Tomás Tamayo de Vargas, historiador espanhol, nasceu em 1588 e morreu em 1641. Cronista do Reino, escreveu essa obra por ordem real, que foi publicada em 1628, utilizando documentação oficial e informações que as relações da época lhe proporcionavam. ‘Restauracion de la ciudad del Salvador, i Baia de Todos-Sanctos, en la Provincia del Brasil’ reflete a opinião oficial espanhola sobre a restauração da Bahia e mostra a repercussão que o acontecimento teve na metrópole espanhola que, na época, dominava o Brasil. Rodrigues considera essa uma edição ‘rara’ e Brunet afirma ser ‘muito rara’. Há uma edição brasileira, difícil de encontrar, publicada em Salvador pela Tipografia de Epifanio Pedroza (1847)

Collecção das Leis do Brazil de 1815

Parte 1 - Cartas de Lei, Alvarás, Decretos e Cartas Régias

Voyages dans la partie septentrionale du Bresil, depuis 1809 jusqu'en 1815, comprenant les provinces de Pernambuco, Fernambouc, Seara, Paraiba, Maragnan, etc.

Titulo original : travels in brazil : in the years from 1809, to 1815.

Voyage au Brésil, dans les années 1815, 1816 et 1817

Ouvrage enrichi d'un superbe atlas, compose de 41 planches gravées en taille-douce, et de trois carte.

Age and growth of Mugil cephalus (Linnaeus, 1758) (Perciformes: Mugilidae) in Bonny Estuary

The age and growth of Mugil cephalus was investigated in Bonny Estuary, Nigeria, from January, 1995 to December, 1996. Length-weight relationships were isometric with length exponents of 2.84 (males), 2.90 (females) and 2.88 (overall). Modal length at age were 12.0cm, 20.9cm, 25.0cm, 28.4cm and 30.2cm TL for ages 0+, 1+, 2+, 3+ and 4+ respectively. Corresponding total weights were 20.01g, 78.93g, 173.12g, 217.61g and 247.50g, respectively. Asymptotic length (Lo) was estimated 33.2cm TL, asymptotic weight (W sub(o)) was 484g, growth coefficient K=0.55847 super(-1) and hypothetical age at zero length To = 0.152yr. Longevity, Tmax, was 5.0yr, length and weight growth performance indices were Q super(1)=2.79 and Q = 1.44, respectively. Total mortality, natural mortality and fishing mortality were z = 1.02yr super(-1), M=0.607yr super(-1) and F=O. 3129yr super(-1), respectively. The exploitation ratio E was 0.4048 and exploitation rate U = 0.2302yr super(-1)

Some ecological roles of Hippopotamus (Hippopotamus amphibious Linn. 1758) in fish production: possibilities for integrated fish-cum Agric production system

The common hippopotamus (Hippopotamus amphibious Linn. 1758) contributes to the productivity of aquatic systems where it lives. This paper reviews ecological roles of the hippo in this regard. Desk review of available literature information complemented with field observations were employed in the data collection. The ecological roles of the common hippopotamus being presented draw examples from East, West, Central and South African sub regions. The nutritional importance of the amphibious hippopotamus to rural communities was highlighted. In Southern Ethiopia, the Bodi, Bacha and Mura tribes eat hippo meat and this has led to severe hunting consequences on the wild populations of the animal. The important relationships between the hippopotamus and fish were presented. Hippopotamuses usually defecate in water and their excrements enrich the nutrients in the water resulting in favourable conditions for large fish populations. Some fish, including Labeo spp. were observed to feed on the micro-organisms and algae that grow on the skin of the hippotamus. A strong case was made for hippo-cum-fish integrated farm development in Nigeria based on ecological relationships so observed between the amphibious mammals and fish. This is one of the meeting points of fisheries and wildlife management that should be exploited for the benefits of the teeming Nigerian population

Effect of darting phenomenon of African catfish Heterobranchus longifilis (Burchell 1822) on growth performance of Nile tilapia: Oreochromis niloticus (Linnaeus, 1758)

Replicate Ponds of 0.02ha stocked at 500 catfishes with 20,000 tilapia/ha were used to assess growth performance of O.niloticus, average weight 50.4g with (i) darted catfish; H.longifilis (shooters) average weight 60.3g (ii) non-shooters of H.longifilis, average weight 35.4g. Final mean weight, mean growth rate, specific growth rate and food conversion ratio were 499.5g 26g/day, 1.36% and 5.58% respectively for O.niloticus stocked with longifilis (shooters and 440.4g 2.3g/day 1.23% and 5.58% respectively for O.niloticus stocked withH.longifilis (non- shooters) and 246.9g, 1.2g/day, 0.93, 6.30% respectively for tilapia in monoculture. The least growth was noted for O. niloticus in monoculture while the best growth was recorded O. niloticus in polyculture with darted catfish