Nanoclay-based Pigments: synthesis, characterization and application

Nanoclay-based pigments are promising colorants. They enhance the colorimetric properties of the dye giving more intense and saturated colours. In addition, they act as reinforce additive when they are dispersed into polymers. They can be applied in a wide variety of substrates: printing inks, textiles, acrylic paints and concrete; and more applications are being developed. One important advantage of the nanoclay-based pigments is the fact that they can be considered an ecological alternative to contaminant colorants, in contrast to some traditional inorganic pigments that contend heavy metal in their structure.

NaOH and KOH for preparing activated carbons used in energy and environmental applications

Alkaline hydroxides, especially sodium and potassium hydroxides, are multi-million-ton per annum commodities and strong chemical bases that have large scale applications. Some of them are related with their consequent ability to degrade most materials, depending on the temperature used. As an example, these chemicals are involved in the manufacture of pulp and paper, textiles, biodiesels, soaps and detergents, acid gases removal (e.g., SO2) and others, as well as in many organic synthesis processes. Sodium and potassium hydroxides are strong and corrosive bases, but they are also very stable chemicals that can melt without decomposition, NaOH at 318ºC, and KOH at 360ºC. Hence, they can react with most materials, even with relatively inert ones such as carbon materials. Thus, at temperatures higher than 360ºC these melted hydroxides easily react with most types of carbon-containing raw materials (coals, lignocellulosic materials, pitches, etc.), as well as with most pure carbon materials (carbon fibers, carbon nanofibers and carbon nanotubes). This reaction occurs via a solid-liquid redox reaction in which both hydroxides (NaOH or KOH) are converted to the following main products: hydrogen, alkaline metals and alkaline carbonates, as a result of the carbon precursor oxidation. By controlling this reaction, and after a suitable washing process, good quality activated carbons (ACs), a classical type of porous materials, can be prepared. Such carbon activation by hydroxides, known since long time ago, continues to be under research due to the unique properties of the resulting activated carbons. They have promising high porosity developments and interesting pore size distributions. These two properties are important for new applications such as gas storage (e.g., natural gas or hydrogen), capture, storage and transport of carbon dioxide, electricity storage demands (EDLC-supercapacitors-) or pollution control. Because these applications require new and superior quality activated carbons, there is no doubt that among the different existing activating processes, the one based on the chemical reaction between the carbon precursor and the alkaline hydroxide (NaOH or KOH) gives the best activation results. The present article covers different aspects of the activation by hydroxides, including the characteristics of the resulting activated carbons and their performance in some environment-related applications. The following topics are discussed: i) variables of the preparation method, such as the nature of the hydroxide, the type of carbon precursor, the hydroxide/carbon precursor ratio, the mixing procedure of carbon precursor and hydroxide (impregnation of the precursor with a hydroxide solution or mixing both, hydroxide and carbon precursor, as solids), or the temperature and time of the reaction are discussed, analyzing their effect on the resulting porosity; ii) analysis of the main reactions occurring during the activation process, iii) comparative analysis of the porosity development obtained from different activation processes (e.g., CO2, steam, phosphoric acid and hydroxides activation); and iv) performance of the prepared activated carbon materials on a few applications, such as VOC removal, electricity and gas storages.

Sentiment classification for early detection of health alerts in the chemical textile domain

In the chemical textile domain experts have to analyse chemical components and substances that might be harmful for their usage in clothing and textiles. Part of this analysis is performed searching opinions and reports people have expressed concerning these products in the Social Web. However, this type of information on the Internet is not as frequent for this domain as for others, so its detection and classification is difficult and time-consuming. Consequently, problems associated to the use of chemical substances in textiles may not be detected early enough, and could lead to health problems, such as allergies or burns. In this paper, we propose a framework able to detect, retrieve, and classify subjective sentences related to the chemical textile domain, that could be integrated into a wider health surveillance system. We also describe the creation of several datasets with opinions from this domain, the experiments performed using machine learning techniques and different lexical resources such as WordNet, and the evaluation focusing on the sentiment classification, and complaint detection (i.e., negativity). Despite the challenges involved in this domain, our approach obtains promising results with an F-score of 65% for polarity classification and 82% for complaint detection.

Redes de seguridad para cierre vertical de fachadas

Entre otros medios de protección colectiva, en los últimos años se vienen utilizando en España redes verticales de cierre de fachadas, a paño completo entre forjados en fase de estructura, y también para huecos menores como ventanas o puertas, en fases posteriores. Este tipo de protección no cuenta hasta el momento con ningún tipo de regulación oficial, si bien en el grupo de trabajo AEN/CTN81/SC2/GT7 se desarrolla actualmente el borrador de la norma Pr UNE 81651 a tal fin. Desde el Dtº. de Ing. de la Construcción de la Universidad de Alicante, varios miembros del grupo de trabajo han desarrollado, contando con la experiencia en otros sistemas de protección, algunos modelos numéricos con elementos finitos para valorar y cuantificar variables mecánicas asociadas al episodio de una eventual caída de una persona sobre este tipo de redes, caracterizado por una menor energía cinética que para otros tipos de ellas. En el artículo se exponen los resultados obtenidos para ambos tipos de paños, grandes y pequeños, donde se han valorado la separación de anclajes de la red, las aberturas generadas en su perímetro durante la retención, los esfuerzos en anclajes y elementos textiles, el factor de impacto que sufriría el accidentado y la repercusión de la disposición geométrica de la red, al cuadro o al rombo.

A model for acoustic absorbent materials derived from coconut fiber

In the present paper, a methodology is proposed for obtaining empirical equations describing the sound absorption characteristics of an absorbing material obtained from natural fibers, specifically from coconut. The method, which was previously applied to other materials, requires performing measurements of air-flow resistivity and of acoustic impedance for samples of the material under study. The equations that govern the acoustic behavior of the material are then derived by means of a least-squares fit of the acoustic impedance and of the propagation constant. These results can be useful since they allow the empirically obtained analytical equations to be easily incorporated in prediction and simulation models of acoustic systems for noise control that incorporate the studied materials.

Emissions from the Pyrolysis and Combustion of Different Wastes

Paper submitted to the 7th International Symposium on Feedstock Recycling of Polymeric Materials (7th ISFR 2013), New Delhi, India, 23-26 October 2013.

Estudio de la descomposición térmica de tetrabromobisfenol A

Resumen de la comunicación presentada en el XIII Congreso Nacional de Ingeniería Química, Madrid, 18-20 noviembre 2010.

Bienes muebles de mudéjares castellonenses. Siglo XV

Transcripción y estudio de 23 inventarios de bienes muebles de mudéjares castellonenses a través de los libros del Corte de Justicia para Castellón, Segorbe y Onda, fuente de muchos datos de diverso tipo sobre la vida de estos mudéjares y que generalmente se redactan post mortem para satisfacer deudas del fallecido. Se centra el análisis en la propiedad de animales de tiro y transporte, el trabajo de las fibras textiles y los elementos externos que los diferencian de los cristianos.

APROXIMACIÓN AL DISEÑO DE SISTEMAS DE BIO-REACTORES PARA LA DELIGNIFICACIÓN DE MATERIALES LIGNOCELULÓSICOS Y PARA LA DECONTAMINACIÓN DE SUELOS Y EFLUENTES

Los materiales lignocelulósicos residuales de las actividades agroindustriales pueden ser aprovechados como fuente de lignina, hemicelulosa y celulosa. El tratamiento químico del material lignocelulósico se debe enfrentar al hecho de que dicho material es bastante recalcitrante a tal ataque, fundamentalmente debido a la presencia del polímero lignina. Esto se puede lograr también utilizando hongos de la podredumbre blanca de la madera. Estos producen enzimas lignolíticas extracelulares fundamentalmente Lacasa, que oxida la lignina a CO2. Tambien oxida un amplio rango de sustratos ( fenoles, polifenoles, anilinas, aril-diaminas, fenoles metoxi-sustituídos, y otros), lo cual es una buena razón de su atracción para aplicaciones biotecnológicas. La enzima tiene potencial aplicación en procesos tales como en la delignificación de materiales lignocelulósicos y en el bioblanqueado de pulpas para papel, en el tratamiento de aguas residuales de plantas industriales, en la modificación de fibras y decoloración en industrias textiles y de colorantes, en el mejoramiento de alimentos para animales, en la detoxificación de polutantes y en bioremediación de suelos contaminados. También se la ha utilizado en Q.Orgánica para la oxidación de grupos funcionales, en la formación de enlaces carbono- nitrógeno y en la síntesis de productos naturales complejos. HIPOTESIS Los hongos de podredumbre blanca, y en condiciones óptimas de cultivo producen distintos tipos de enzimas oxidasas, siendo las lacasas las más adecuadas para explorarlas como catalizadores en los siguientes procesos:  Delignificación de residuos de la industria forestal con el fin de aprovechar tales desechos en la alimentación animal.  Decontaminación/remediación de suelos y/o efluentes industriales. Se realizarán los estudios para el diseño de bio-reactores que permitan responder a las dos cuestiones planteadas en la hipótesis. Para el proceso de delignificación de material lignocelulósico se proponen dos estrategias: 1- tratar el material con el micelio del hongo adecuando la provisión de nutrientes para un desarrollo sostenido y favorecer la liberación de la enzima. 2- Utilizar la enzima lacasa parcialmente purificada acoplada a un sistema mediador para oxidar los compuestos polifenólicos. Para el proceso de decontaminación/remediación de suelos y/o efluentes industriales se trabajará también en dos frentes: 3) por un lado, se ha descripto que existe una correlación positiva entre la actividad de algunas enzimas presentes en el suelo y la fertilidad. En este sentido se conoce que un sistema enzimático, tentativamente identificado como una lacasa de origen microbiano es responsable de la transformación de compuestos orgánicos en el suelo. La enzima protege al suelo de la acumulación de compuestos orgánicos peligrosos catalizando reacciones que involucran degradación, polimerización e incorporación a complejos del ácido húmico. Se utilizarán suelos incorporados con distintos polutantes( por ej. policlorofenoles ó cloroanilinas.) 4) Se trabajará con efluentes industriales contaminantes (alpechínes y/o el efluente líquido del proceso de desamargado de las aceitunas).

Comparison of PRC and Vietnam's Responses to the Elimination of U.S. Textile and Apparel Quotas: Economic and Cultural Perspectives. ACES Working Paper No. 1, 2007

International trade in textiles and apparel has, as of January 1, 2005, been set free from the very intricate Multi-Fiber textile and apparel quota Arrangement (MFA). This event has raised many uncertainties about the new international trade climate and has placed enormous pressure on China as the expected clear cut beneficiary of this liberalization.' Other countries considered to be major contenders include Vietnam which also has a large population employed in the textile and apparel (T&A) sector. Since the old quota system had provided a certain degree of market certainty to competing T&A producers, will the new free trade environment lead to a shake out where mass producers with large economies of scale dominate the new reality? The removal of T&A quotas will create opportunities for Vietnam and China along with other developing countries, but it will also expose them to additional competition from each other. The outcome of this competition will depend on the demand in the US, the ability of the exporting countries to differentiate their exports and on their ability to transfer additional resources to expand domestic output in the direction of the new 'free market signals' and away from rent seeking objectives. Obviously, exporting countries that adjust to this new environment quickly will improve their competitiveness, and will be the new beneficiaries of a quota free international trade in textiles and apparel. This paper attempts to shed some light on the differences and similarities in the responses of Chinese and Vietnamese T&A sectors to this new environment. It first focuses on the demand side attempting to determine whether or not Chinese and Vietnamese T&A items, formally under quota control, are substitutes or compliments. On the supply side, the paper focuses on institutional differences between each country's T&A sectors, the different domestic government policies that have contributed to their growth and the unique cultural differences which will determine the future progress in each country's T&A sectors.

The WTO and Female Labor Rights in Developing Countries. IES WORKING PAPER 3/2008

The impacts of WTO on women’s labour rights in the developing countries have been raised to the international agenda by various nongovernmental organizations. On the one hand it is assumed that international trade policies are gender neutral. On the other hand a number of authors hold the view that the negative impacts of WTO policies are more pronounced on female than male workers. This paper takes a critical look at these claims. It argues that the impact of the WTO system, the driving force of trade liberalization, on women’s labour rights in the developing countries is a complicated issue, because the effects have been both negative and positive. In support of this claim, this paper first briefly reviews the international framework for the protection of women’s labour rights. Next, the WTO agreements and policies are analysed insofar as they are relevant for the protection of women’s labour rights. The analysis covers, for example, the use of the trade policy review mechanism and restrictions of trade on grounds of violation of public morals.. Finally, a case study is conducted on the situation of female workers in Bangladesh and Pakistan, countries that have recently undergone a liberalization of trade in the textiles and clothing sectors. It is concluded that the increase of international trade in the developing countries has created many work opportunities for women, helped them to become more independent and allowed them to participate in the society more actively. However, it is at the same time posited that in order to comply with its own objectives of raising standards of living and full employment, the WTO should engage itself in active policies to overcome the negative aspects of trade on female workers in the developing countries.

Quantifying Non-Tariff Measures for TTIP. Paper No. 12 in the CEPS-CTR project ‘TTIP in the Balance’ and CEPS Special Report No. 116/July 2015

This paper provides an overview of methods employed to quantify non-tariff measures (NTMs) and then analyses their differences and looks at what these mean for the Transatlantic Trade and Investment Partnership (TTIP) negotiations. The authors find several similarities in the approaches taken. Because all studies conclude that NTMs matter, they argue that policy-makers are right to focus on ‘regulatory cooperation’ in TTIP. Given the significant differences in NTMs across sectors, policy-makers are urged to dive deep into sector-specific elements of NTMs and focus on those sectors where the largest potential gains can be made (i.e. where NTMs are highest, such as in agriculture, automobiles, steel, textiles and insurance services). An area identified for further research is the fact that unlike trade taxes (i.e. tariffs), regulatory barriers to trade are not generally targeted as the primary policy objective, but rather stem from other strategic policy concerns such as consumer safety and/or social and environmental protection. This element should be further investigated.

Greek, Roman and Egyptian antiquities ... /

"Pubic auction sale."

Leçons de chimie élémentaire appliquée aux arts industriels /

v. 1. Chimie minérale. Métalloïdes.--v. 2. Chimie minérale. Métaux.--v. 3. Chimie organique.--v. 4. Matières textiles et Matières tinctoriales.--v. 5. Matières animales et fonctions organiques. Suppléments. Table générale.

Side impact padding integration study. Final report.

Mode of access: Internet.