Mesoporous alumina and magnesia were prepared using various polymers, poly(ethylene glycol) (PEG), poly(vinyl alcohol) (PVA), poly(N-(2-hydroxypropyl) methacrylamide) (PHPMA), and poly(dimethylacrylamide) (PDMAAm), as porogenic structure matrices. Mesoporous alumina exhibits large Brunauer–Emmett–Teller (BET) surface areas up to 365 m2 g−1, while mesoporous magnesium oxide possesses BET surface...

In this work, Cs ion sorption on some clays and zeolite were investigated. Cs was used as a tracer. Activities were measured with a NaI crystal gamma counter. The particle size distribution was determined by a laser sizer. Surface area of the particles were determined by BET (Brunauer, Emmett and Teller method). Structure analysis was made by using X-ray diffraction. The chemical compositions o...

A carbon-encapsulated Fe3O4 nanocomposite was prepared by a simple one-step pyrolysis of iron pentacarbonyl without using any templates, solvents or surfactants. The structure and morphology of the nanocomposite was investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller analysis and Raman spectroscopy. Fe3O4 nanoparticles are di...

In this paper, synthesised nanometre sized hydroxyapatite (nano-HAP) powders composed of spherical 30 ± 5 nm part icles were compacted and sintered at temperatures ranging from 650 to 1250°C to form ceramics of varying porosity and mechanical strength. The size, crystalline structure and morphology of both the synthesised nano-HAP particle powders and the compacted and sintered ceramics were in...

Silver, gold and copper oxide sponges have been synthesized via thermal treatment using Triton X–165 as sacrificial template. Scanning electron microscopy, X-ray diffraction, Thermogravimetric analysis and Brunauer–Emmett-Teller adsorption isotherms techniques are used to characterize the monoliths. Additives like dextran, silica nanoparticles and 1,3,5 trimethylbenzene significantly affect the...

Under 5 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.3 5 to 9 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10.8 10 to 14 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7.9 15 to 19 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8.7 20 to 24 years . . . . . . . . . . . . . . . . . . . . . . ...

A paper by Selden and Sing (2008) reminds us of what was at stake 45 years ago, when Emmett Hall recommended universal public medical insurance over private-public alternatives. While focusing exclusively on the United States, it also helps to explain why universal pharmacare is being diverted into that same private-public dead end through public "catastrophic" coverage. Governments finance, th...

17 Air pollutants are recognised as important agents of ecosystem change but few studies consider 18 the effects of multiple pollutants and their interactions. Here we use ordination, constrained cluster 19 analysis and indicator value analyses to identify potential environmental controls on species 20 composition, ecological groupings and indicator species in a gradient study of UK acid grassl...

Silica nanoparticles were directly coated with cobalt hydroxide by homogeneous precipitation of slowly decomposing urea in cobalt nitrate solution. The cobalt hydroxide was amorphous, and its morphology was nanoflower-like. The BET (Brunauer-Emmett-Teller) surface area of the core-shell composite was 221 m²/g. Moreover, the possible formation procedure is proposed: the electropositive cobalt io...