Full Impregnation

In one sense full impregnation of timber is a false goal. If the surface layer of the timber can be impregnated with a water resistant resin, the centre can remain... 

SPRINT allows heavier weight reinforeement to be used when compared with prepreg technology and conforms readily during proeessing. Resin flow is more easily eontrolled than in the resin infusion process and the resin only has to flow through the thickness of the fiber to achieve full impregnation. 

Full impregnation is usually achieved by pressure. The principal reason for full impregnation is to improve the strength and other mechanical properties of concrete. Durability improvement accompanies this. 

The full impregnation process consists essentially of the same steps as the partial impregnation process. Fully impregnated concrete applications are restricted to precast concrete members [9]. 

The production of hollowed cored profiles is carried out using a core which is mounted buoyant in the tool (see Fig. 8.29). The core usually is equipped with a separate heating and cooling system in order to enable full impregnation of the interior reinforcement fibers. In some cases, for example when polypropylene is used as matrix material, it is not necessary to use a release film around the core. In this case, the temperature distribution of... 

EN 21 Method for the determination of the toxic values of a wood preservative against larvae of Anobium punctatum (de Geer), introduced into wood which has been treated previously by full impregnation. 

In cases of single statues, a full impregnation may be performed with methyl methacrylate in a vacuum oven then MMA is radically polymerized to form PMMA in the entire inside of the sculpture this indeed is a very efficient way of preserving sculptures, at least in many selected cases. However, a full impregnation cannot be done with the entire Cathedral of Cologne. The method of choice would be to impregnate a stone, preferably with an aqueous emulsion of a material which penetrates very deeply into the stone, adheres to the inner surface of the stone and leaves the pores open. The liquid water is kept away, the material remains open for water vapor transport. By means of scanning electron microscopy it may be shown that a mineral is fully covered with a very thin layer of a polymer. 

In this paper we report (i) the catalytic activity for SCR of VOx/Zr02 samples prepared by various methods (adsorption from aqueous metavanadate solutions at different pH values, dry impregnation, and adsorption from VO(acetylacetonate)2 in toluene), (ii) sample characterization (nuclearity, dispersion and oxidation state) by means of XPS, ESR and FTIR and (iii) the nature and reactivity of the surface species observed in the presence of the reactant mixture. Catalytic results are here reported in full. Characterization data relevant to the discussion of the catalytic activity will be given, whereas details on the catalysts preparation and... 

Wear full protective clothing (Level A) consisting of M3 butyl mbber suit with hood, M2A1 boots, M3 gloves, impregnated underwear, M9 series mask and coveralls (if desired), or the 30 mil DPE if available, or NIOSH-approved equivalent wear... 

Bethell Also known as the Full-cell process. A method for impregnating timber with a creosote preservative. The wood is first degassed under partial vacuum and then impregnated under a pressure of up to 10 atm. See also Rueping. 

Normally, the best activities observed during the development process are found for catalysts prepared in the laboratory where special attention is paid to each preparation step and where better control of e.g. impregnation and calcination temperature history can be achieved. This should be kept in mind when comparing activities of new lab-prepared catalysts with standard products from a production facility. As a consequence, it is seldom worth the effort to continue with a test production if the activity of the lab-prepared catalyst fails to meet the requirements. Important results for the test-produced catalysts are activity measurements covering the full range of operating conditions in the industrial converter and the mechanical strength. 

A very important factor in ensuring that full cell wall penetration has occurred is to allow sufficient time for the impregnant molecules to diffuse into the intracellular spaces. Many workers allow several days (weeks in some cases) for this to occur. It is important to emphasize that pressure treatment will aid penetration of larger wood samples, but will not in any way result in cell wall penetration, which is a purely diffusion-controlled process. 

Buchner funnel and fill the funnel from % t0 % full of the Dynamite sample. The amt will depend on the expl oil content, which is detd from the ether extraction conducted as follows Pour in 50 mi of ether, cover the funnel with a watch glass, let stand to impregnate the sample and then apply suction. Repeat with 3 addnl 50-ml portions of ether and transfer the extract to a low beaker. Evaporate the ether at 50—60°C while passing over it a stream of dry air, taking care not to introduce any moisture. Continue evaporation until disappearance of ether odor and then for 15 mins longer. Filter off the resins, sulfur and other insol substances from the explosive oils, using a very small, fast filter paper (such as No 41 Whatman) into a rubber-stoppered bottle contg the expl oil previously obtd from detn of ether extract. 

N. Strampelli, B. Tacke, A. Teichinger, E. Teisler, J. A. Volcker, etc.—with the object of impregnating soils with the bacteria so necessary for the full development of leguminous plants. A number of cultures of these bacteria have been placed on the market so that soils can be readily inoculated, For example, there are... 

Each bead represents one catalyst as a member of a library of solid catalysts. It may consist of an unporous material like a-Al2C>3 or Steatit or of typical porous support materials - such as A1203, Si02, Ti02, or the like. These beads can be subjected to different synthesis procedures and sequences like impregnation, coating etc. In addition, full mixed metal oxide catalysts can also be formed as spherical particles. 

The rhodium monolith showed a lower hydrogen selectivity of 50% at the same temperature and residence time. For the FeCrAlloy monolith impregnated with nickel, full conversion was achieved at 900 °C, but at a lower hydrogen yield [55],... 

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