Temperature maturation influenced

This work leads to the conclusion that using low reactants concentrations is impoitant to get a support with a high surface area. The total porous volume is not significantly influenced by the preparation conditions studied However it possible to get a mesoporous support by choosing low reactants concentrations, high reaction and maturation temperature, maturation time and and addition rate. This corresponds to S2 which has a 110 m /g specific surface, 50% of the porous volume provided by pores of Dp>20 nm and 18% by pores of Dp in the range 5 to 20 run. The reproducibility of the preparation procedure is excellent. 

Several studies have indicated that the species diversity of indigenous soil communities will influence the species composition of ectorhizosphere populations (176). On mature roots, seasonal successions may be observed as the soil microbial activity varies with temperature, water content, nutrition, and root exudation. Acero et al. (177) found that the composition of alder (Almis) rhizosphere populations alternated between one dominated by Bacillus spp. in autumn and winter and one dominated by Pseudomonas spp. in spring and summer. 

The evolution of sedimentary organic matter (OM) under the influence of increasing burial depth and related temperature rise is termed maturation and this process is commonly subdivided into three stages, i.e., diagenegisis, catagenesis, and metagenesis (Figure 1). 

The tolerance limitation of fruit for irradiation establishes the maximum acceptable dose. If this dose controls decay organisms, the use of irradiation for a particular fruit may appear promising. Response to irradiation may be influenced by fruit maturity, variety, pre- and postharvest temperatures, handling, and extent of fungus growth. Climacteric fruits irradiated prior to the normal rapid increase in respiration usually show an immediate increase in respiration and the production of ethylene. These fruits are frequently retarded in ripening. 

Artificial Maturation. Laboratory maturation studies provide a means to determine the influence of temperature on kerogen composition, since other variables (e.g. source input) can be eliminated. In order to study the behaviour of organically bound sulfur under these controlled conditions, Py-GC-FID/FPD was performed on a suite of solvent-extracted residues from sealed vessel (hydrous pyrolysis) experiments aimed at simulating maturation over the range involved in petroleum generation. 

The duration of this phase also significantly influences the final characteristics of the wine. Thus, the wine maker must consider the temperature-duration interaction as both direct the development of the wine toward an early or late maturing style. 

According to traditional process, during maturation, the wines are subjected to fluctuating seasonal temperature extremes that, in relation to the length of the aging period, can lead to significant losses due to evaporation. These extremes of temperature also strongly influence the chemical and physical transformations in the wine, with important... 

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