Concepts on the contribution of chemistry to a sustainable development. Renewable raw materials - Comptes rendus Chimie - Article
نویسندگان
چکیده
The principles of the Rio Conference (1992) and Agenda 21 address the pressing problems of today and also aim at preparing the world for the challenges of this century. The conservation and management of resources for development are the main foci of interest, to which chemistry will have to make a considerable contribution. Since base chemicals are produced in large quantities and important product lines are synthesized from them, their resource-saving production is especially important for a sustainable development. New processes based on renewable feedstocks are significant here. Most products that are obtained from renewable raw materials may, at present, not be able to compete with the products of the petrochemical industry, but this will change as oil becomes scarcer and oil prices rise. The design of chemical products should make sustainable processing and recycling possible, and should prevent their bioaccumulation. Methods and criteria to assess their contribution to a sustainable development are necessary. The time necessary to introduce the new more sustainable processes and products has to be diminished by linking their development with operational innovation management and with efficient environmental-political control procedures. To cite this article: J.O. Metzger, C. R. Chimie 7 (2004). © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved.
منابع مشابه
The physiological construction of the neurone concept (1891-1952).
Steps in the physiological construction of the neurone concept are described. Early ideas on the function of the nerve cell led to later polemics on the neurone doctrine and the speculative attitude of histophysiology. Researches of Sherrington and Adrian emerged from a specific British context, and confronted American oscillography and Berger rhythm. At the end of various polemics, the neurone...
متن کاملClassification des compte-rendus mammographiques à partir d'une ontologie radiologique en OWL
Résumé. Dans cet article, nous proposons un système de classification des comptes-rendus mammographiques, reposant sur une ontologie radiologique décrivant les signes radiologiques et les différentes classes de la classification ACR des systèmes BIRADS dans le langage OWL. Le système est conçu pour, extraire les faits issus des textes libres de comptes-rendus en étant dirigé par l’ontologie, pu...
متن کاملThe nexus of renewable energy - sustainable development - environmental quality in Iran: Bayesian VAR approach
The use of renewable energy reduces environmental pollution and leads to achievement of sustainable development. The current study investigates the dynamic interrelationship between sustainable development, renewable and non-renewable energies and environment nexus by applying Bayesian vector autoregression (BVAR) and impulse response functions in Iran with an annual data frequency for the time...
متن کاملMixed borohydride-chloride complexes of the rare earth elements - Comptes rendus Chimie - Article
Mixed borohydride-chloride complexes of lanthanum and neodymium having the 2,5bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl ligand in the coordination sphere were synthesised by the reaction of potassium 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl [(DIP2-pyr)K] with a 1:1 mixture of [Ln(BH4)3(THF)3] and LnCl3 (Ln = La, Nd). Both compounds are dimeric in the solid state. The metal ...
متن کاملWater-deficit stress-induced anatomical changes in higher plants.
Water is vital for plant growth and development. Water-deficit stress, permanent or temporary, limits the growth and the distribution of natural vegetation and the performance of cultivated plants more than any other environmental factors do. Although research and practices aimed at improving water-stress resistance and water-use efficiency have been carried out for many years, the mechanism in...
متن کامل