Hydrothermal synthesis of Gd2O3:Eu3+ nanophosphors: Effect of surfactant on structural and luminescence properties

Various morphologies of Eu3+ activated gadolinium oxide have been prepared by hydrothermal method using hexadecylamine (HDA) as surfactant at different experimental conditions. The powder X-ray diffraction studies reveal as-formed product is hexagonal Gd(OH)(3):Eu3+ phase and subsequent heat treatment at 350 and 600 degrees C transforms to monoclinic GdOOH:Eu3+ and cubic Gd2O3:Eu3+ phases respectively. SEM pictures of without surfactant show irregular shaped rods along with flakes. However, in the presence of HDA surfactant, the particles are converted into rods of various sizes. The temperature dependent morphological evolution of Gd2O3:Eu3+ without and with HDA surfactant is studied. TEM micrographs of Gd(OH)(3):Eu3+ sample with HDA confirms smooth nanorods with various diameters in the range 20-100 nm. FTIR studies reveal that HDA surfactant plays an important role in conversion of cubic to hexagonal phases. Among these three phases, cubic phase Gd2O3:Eu3+ (lambda(ex) = 254 nm) show red emission at 612 nm corresponding to D-5(0)-> F-7(2) and is more efficient host than the monoclinic counterpart. The band gap for hexagonal Gd(OH)(3):Eu3+ is more when compared to monoclinic GdOOH:Eu3+ and cubic Gd2O3:Eu3+. (C) 2013 Elsevier B. V. All rights reserved.

Diário da Constituinte [gravação de vídeo] : [programa n. 755] 

Destaca que a nova Constituição pela primeira vez tem um capítulo sobre ciência e tecnologia. A nova Carta protege as empresas, preservando o mercado e permitindo assim a capacitação tecnológica. Constituintes fazem últimas assinaturas da nova Constituição antes de sua promulgação e comentam sobre a importância dela para o País.

On the toxicity of some pesticides for fish [Translation from: Izv.gos.nauchno-issled.Inst.ozern.rybn.Khoz. 121, 95-96, 1977]

In the piscicide laboratory of GosNIORKh over a series of years was carried out the ichthyological evaluation of different agricultural pesticides, used both in our country and abroad. In all more than 300 different chemical substances were tested. Here, it was established that around 10% of them possessed high ichthyotoxic properties. Experiments were conducted under laboratory conditions on aquarium fish in groups, and also on representatives of different species of lake ichthyofauna. The basic criterion of evaluation of toxicity was the death of experimental fish during 120 hours. This short paper summarises the findings of this reasearch and offers a table presenting acute toxicity of pesticides for fish.

>~（121）C核高自旋态在束γ研究和BGC晶体球性能测定

本文描述了在束γ谱学实验方法，并用这种方法研究了~（121）Cs核的高自旋态能级结构，观测到了~（121）Cs核中基于9/2~+质子空穴态上的△J = 1 的带和基于11/2~-准质子带，并在这两个带上鉴定出了四条新能级及六条新的γ跃迁。对这一结果进行了分析讨论。本文还讨论了一个小型BGO晶体球性能的测试方法，并给出了测试结果

Spanish Sociology and Anti-Semitism Between passed prejudice and key to civilization

There is a significant lack of sociological research in Spain about anti-Semitism. At the same time there are alarming anti-Semitic tendencies and anti-Jewish stereotypes which are above the European average. This article aims to explain this lack of sociological research about anti-Semitism in Spain. Therefore two types of explications are offered: on the one hand side some structural problems will be shown which sociology in general had since its beginnings and which complicate the understanding of anti-Semitism. Furthermore explications regarding the specific social and historic situation in Spain and of Spanish sociology in particular will be exposed. It will be shown that for its rationalistic character and with the exception of very few authors – who are considered marginalized for practical research – sociology in general has had enormous problems in understanding anti-Semitism. The specific historic situation, Francoism, the dispute about the historic memory and the delayed institutionalisation of sociology could also explain the lack of sociological interest in the topic especially in Spain. The article shows that the study of anti-Semitism is not only relevant for struggling against this burden of society in many of its variants. Furthermore, thinking about anti-Semitism can help sociology to recognise its own epistemological problems. It can serve to criticise and improve instruments of sociological research by showing the limitations of the sociological approach and to uncover the importance of interdisciplinary research for understanding specific social phenomena. In that sense, anti-Semitism, far from being a marginal subject, can be considered a key topic in the process of civilisation and it can help us to decipher the contemporary Spanish society.

Le vieux caporal : drame en cinq actes. [suivi de] Diane de lys et de camélias, ou La femme du monde légère, liée à un homme bilieux qui n'entend pas la plaisanterie : grande parodie en 3 petits tableaux. Livr. 121 / par MM. Dumanoir et d'Ennery ; par MM. Delacour et Lambert Thiboust

Collection : Théâtre contemporain illustré ; 121e et 122e livraisons

Livre des Morts de Nésyménou. Egyptien 121

Fragment 3 :Col. 1 + vignette : chapitre 28 (formule pour empêcher qu'on ne retire son coeur au défunt). La vignette montre le coeur du défunt et une divinité assise sur une maison.Col. 2 + vignette : chapitre 30B (formule pour empêcher que s'oppose le coeur du défunt). La vignette représente un scarabée.Col. 3 + vignette : chapitre 31 (formule pour repousser un crocodile venu pour enlever la magie-hékaou du défunt).Fragment 1 : la vignette montre le défunt armé d'une pique, qui devait probablement transpercer un animal néfaste.Fragment 2 :Col. 1 + vignette : chapitre 32 (formule pour repousser un crocodile venu pour enlever la magie-hékaou d'un Bienheureux de son contrôle dans la nécropole). La vignette montre deux crocodiles qui devaient être transpercés par le défunt.Col. 2 + vignette : chapitre 33 (formule pour repousser un serpent). La vignette montre le défunt transperçant un insecte (on attendrait un serpent).Col. 3 + vignette : chapitre 37 (formule pour repousser les deux amies). La vignette montre le défunt transperçant un serpent enroulé.Col. 4 + vignette (très fragmentaires) : ?