Porosity

spheres by the sol–gel method in the presence of tartaric acid." Journal of Materials Chemistry 1997, 7, 767–771. (59) Grün, M.; Unger, K. K.; Matsumoto, A. et Tsutsumi, K. "Novel pathways for the preparation of mesoporous MCM-41 materials: control of porosity and morphology." Microporous and Mesoporous Materials 1999, 27, 207–216. (60) Büchel, G.; Unger, K. K.; Matsumoto, A. et Tsutsumi, K. "A novel pathway for synthesis of submicrometer-size solid core/mesoporous shell silica spheres." Advanced Materials

overview of typical problems encountered in injection moulding of rubber, their possible causes, and how these problems can be solved without compromising the quality or properties of the product, or the economics of production. Topics covered include porosity, pebbling/crazing, bloom, poor knitting, shrinkage, backrinding, distortion, tearing on demoulding, and sticking and fouling. EUROPEAN COMMUNITY; EUROPEAN UNION; GERMANY; UK; WESTERN EUROPE Accession no.831313 Item 81 Revista de Plasticos Modernos

courbe hauteurvolume d'un réservoir capillarité 251 capillary action action capillaire frange capillaire êàïèëëÿðíîå âîçäåéñòâèå êàïèëëÿðíàÿ êàéìà działanie sił kapilarnych front kapilarny acţiune capilară 252 capillary fringe 253 capillary porosity porosité capillaire Ù³½³ÝáóÛÇÝ ³½¹»óáõÃÛáõÝ Ù³½³Ï³Ý »ñǽ / »½ñ³ß»ñï Ù³½³Ï³Ý ͳÏáïÏ»ÝáõÃÛáõÝ fill height 245 canal profile capilaritate înălţime capilară êàïèëëÿðíàÿ ïîðèñòîñòü porowatość kapilarna porozitate capilară ‫ ﺁﻟﺔ ﺣﺎﺳﺒﺔ‬233 ‫ ﺗﻌﻴﻴﺮ‬234

Phys., 1987, Vol. 10, pp.1204-1215. Iler R.K., The chemistry of silica : solubility, polymerization, colloid and surface properties, and biochemistry, New-York: John Wiley & Sons, 1979, 866p. Gregg S.J., Sing K.S.W., Adsorption, surface area, and porosity, London: Academic Press, 1967, 371p. 7. 8. 9. 10. 11. 12. 13. 14. 15. Chapitre I : Généralités 51 16. 17. 18. 19. Zhuravlev L.T., The surface chemistry of amorphous silica. Zhuravlev model, Colloids Surf., A, 2000, Vol. 173

is a template material the pore size and pore volume can therefore be adjusted by choosing an appropriate pore-size and porosity for the silica gel 59 CHAPTER 4 : MATERIAL AND METHODS template material. As the porosity of the particles will govern the quantity of material in each particle, the mechanical strength of the material will be greatly affected by the porosity. The surface characteristics of the porous graphitized carbon have been extensively investigated [Knox et al., 1986]. In

9-13 octobre 2000 http:://www.fao.org/DOCREP/005/Y3948F/y3948f00.htm#toc [17.05.04] FAO (2003b). Economie de l’agriculture de conservation ; Rome/Italie ; 71 p. FAO (2003a). Optimizing soil moisture for plant production. The significance of soil porosity. FAO soils Bulletin 79; Rome, 125 p. FAO (2004). Compendium of food and agriculture indicators. Country: Benin; http://www.fao.org/es/ess/compendium_2004/pdf/ESS_BEN.pdf [12.02.2005] 216 Références bibliographiques FAO, (-). La gestion des éléments

poricidal adj. (bot.), poricide pore n. (anat., bot., zoo.), pore m. Porifera n. pl. (zoo.), Porifères m. poriferous adj. (anat., bot., zoo.), avec des pores poroscopy n. (phys.), poroscopie f. porosity n. (phys.), porosité f. porous adj. (phys.), poreux porously adv. (phys.), de façon poreuse porousness = porosity porphyria n. (path.), porphyrie f. porphyrin n. (chim.), porphyrine f. porphyritic(al) adj. (géol.), porphyritique porphyroblast n. (géol.), porphyroblaste m. porphyroid adj. (géol.), comme

poricidal adj. (bot.), poricide pore n. (anat., bot., zoo.), pore m. Porifera n. pl. (zoo.), Porifères m. poriferous adj. (anat., bot., zoo.), avec des pores poroscopy n. (phys.), poroscopie f. porosity n. (phys.), porosité f. porous adj. (phys.), poreux porously adv. (phys.), de façon poreuse porousness = porosity porphyria n. (path.), porphyrie f. porphyrin n. (chim.), porphyrine f. porphyritic(al) adj. (géol.), porphyritique porphyroblast n. (géol.), porphyroblaste m. porphyroid adj. (géol.), comme

popote : kitchen populaire : popular popularité : popularity population : population populeux : populated porc : pork porcelaine : porcelain, china, chinaware porcelet : young pig pore : pore porion : overman pornographie : pornography porosité : porosity port : postage port à percevoir : liable to postage port en lourd : load carrying capacity porta : carried portai : carried portail : porch portâmes : carried portant : guy, armature, anchor porte : door, gate French−english Dictionary 1269 French−english

comparative influence of these factors. The presence of oxygen will inhibit the conversion of iron oxide to iron sulphide. Also, while the concentration of hydrogen sulphide gas has a direct influence on the formation of pyrophors, the degree of porosity of the iron oxide and the rate of flow of the gas over its surface will influence the rate of sulphidation. Experiments have supported the view that there is no safe level of hydrogen sulphide below which a pyrophor cannot be generated. 23.2.2 In