Estudio del proceso de hidrocraqueo catalítico de PB y HIPS vírgenes sobre 0,5%Pt/HBeta

[ES] Actualmente, los plásticos están presentes en multitud de aplicaciones debido a sus buenas propiedades y bajo coste. Sin embargo, el corto uso de algunas aplicaciones y la baja degradabilidad de estos materiales, provoca un problema medioambiental. Debido a que la disponibilidad de materias primas para la producción de polímeros es limitada y, además, cada vez se presta mayor atención a los asuntos medioambientales, es necesario cerrar el ciclo de vida de dichos materiales y centrarse en la reconversión de residuos plásticos a nuevos productos.

Announcing the release of FiSAT (version 1.0)

A brief description of the origin, "philosophy", and key features of FiSAT (FAO-ICLARM Stock Assessment Tools), the joint FAO-ICLARM software is given, along with information on its distribution and maintenance.

Transportation of fish - 1. A preliminary study on insulated containers and their efficacy in long distance transportation

Polythene lined thermocole insulated plywood boxes (second-hand tea chests) could be successfully used for transport of fresh iced fish. It was found that a minimum of 25 mm thermocole insulation was necessary during summer (April to June) and 15 mm during winter (Nov. to March). By using these insulated boxes the initial fish to ice ratio could be brought down to 1:0.75 and still further to 1:0.5 at the height of winter in Jan. and Feb. These second-hand tea chests are robust and are able to stand a minimum of 5 trips to and fro. The moulded polystyrene boxes are not suited for long distance transport. Another redeeming feature in the entire operation was that there was practically no loss of fish due to spoilage in transit. 100% of the fish transported was in acceptable condition and could be marketed. In the non-insulated boxes used by the trade, the loss due to spoilage ranged from 10% to 25%, and this could be completely eliminated by the use of these insulated boxes.

2,4-二取代氨基-6-取代-[1,3,5]三嗪或1,3-嘧啶类化合物、其制备方法、药物组合物及用途

一种新型的2，4-二取代氨基-6-取代-[1，3，5]三嗪或1，3-嘧啶衍生物及其制备方法、药物组合物和其药理用途，其结构通式如式(I)所示，其中R1、R2、R3、R4、R5、R6、A、B、X、Y和Z的定义如说明书中所述。该类化合物与HIV-1整合酶具有很高结合活性，并且在底物竞争测试中能够有效的抑制整合酶对底物的结合。因此该类化合物是较强的HIV-1整合酶抑制剂，有望开发成为新的抗HIV病毒药物。

A family of simple benzene 1,3,5-tricarboxamide (BTA) aromatic carboxylic acid hydrogels.

We present the characterisation of a hydrogel forming family of benzene 1,3,5-tricarboxamide (BTA) aromatic carboxylic acid derivatives. The simple, easy to synthesise compounds presented here exhibit consistent gel formation at low concentrations through the use of a pH trigger.

Measuring the composition of AlGaN layers in GaN based structures grown on 150 mm Si substrates using (2 0 5) reciprocal space maps

A critical element for the successful growth of GaN device layers on Si is accurate control of the AlGaN buffer layers used to manage strain. Here we present a method for measuring the composition of the AlGaN buffer layers in device structures which makes use of a one-dimensional x-ray detector to provide efficient measurement of a reciprocal space map which covers the full compositional range from AlN to GaN. Combining this with a suitable x-ray reflection with low strain sensitivity it is possible to accurately determine the Al fraction of the buffer layers independent of their relaxation state. © 2013 IOP Publishing Ltd.

Direct epitaxial growth of θ-Ni2Si by reaction of a thin Ni(10 at.% Pt) film with Si(1 0 0) substrate

The reaction between an 11 nm Ni(10 at.% Pt) film on a Si substrate has been examined by in situ X-ray diffraction (XRD), atom probe tomography (APT) and transmission electron microscopy (TEM). In situ XRD experiments show the unusual formation of a phase without an XRD peak through consumption of the metal. According to APT, this phase has an Si concentration gradient in accordance with the θ-Ni2Si metastable phase. TEM analysis confirms the direct formation of θ-Ni2Si in epitaxy on Si(1 0 0) with two variants of the epitaxial relationship. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Evolution of height distribution of Ge islands on Si(1 0 0)

Evolution of the height distribution of Ge islands during in situ annealing of Ge films on Si(1 0 0) has been studied. Island height is found to have a bimodal distribution. The standard deviation of the island height divided by the mean island height, for the mode of larger island size is more than that for the other mode. We suggest that the presence of Ehrlich-Schwoebel barriers, combined with the misfit strain, can lead to the bimodal distribution of island size, the mode of larger island size having narrower base size distribution, but wider height distribution for Ge islands on Si(1 0 0). The bimodal distribution of island size could be stable due to kinetics without necessarily regarding it as minimum-energy configuration. (C) 1999 Elsevier Science B.V. All rights reserved.

5-氨基乙酰丙酸对日光温室番茄生长发育和产量品质的影响

为外源5-氨基乙酰丙酸(ALA)在日光温室蔬菜上的应用提供科学依据。【方法】研究了不同浓度ALA处理对日光温室番茄生产的影响。【结果】ALA以及ALA+N叶面施用均明显提高了番茄植株株高、叶绿素相对含量和果实产量,并改善了番茄果实品质;与对照相比,外源ALA各处理植株株高、叶绿素相对含量和单株生物产量均有明显提高,其中D处理(ALA1号肥料第1次2 kg/hm2,第2~4次1 kg/hm2)效果最佳,植株株高、叶绿素相对含量及单株生物产量分别提高27.18%,17.75%和13.93%;外源ALA对番茄果实产量和品质也有明显的提高和改善作用,其中处理B(ALA1号肥料第1次0.5 kg/hm2,第2~4次0.3 kg/hm2)对果实产量效果最明显,处理E(ALA3号肥料第1次2.5 kg/hm2,第2~4次1.5 kg/hm2)对果实品质效果最佳。【结论】处理E(ALA3号肥料第1次2.5 kg/hm2,第2~4次1.5 kg/hm2)既有利于番茄生长发育,又能增加产量并改善品质,为最佳的ALA施用量及方法。