mesoporous是什么意思这应该是一个材料领域的名词

MCM-48 mesoporous silica
如题

英语翻译
3.Results and discussion
3.1.Porous texture characterization
It is remarkable that 25 porous carbons from different precursors and preparation methods are gathered in this study,what offers a variety of porous texture and structure which is rarely found in the literature.All the materials prepared have type I isotherms,what is characteristic of microporous solids.Table 3 contains the BET surface areas and the micropore volumes calculated from N2 adsorption data at 77 K [VDR(N2)] and CO2 adsorption data at 273 K [VDR(CO2)] for each sample.It is interesting to note that samples with different adsorption capacity and micropore size distributions have been developed.A more detailed description of the porous texture for each series of materials is included below,which is in agreement with previous results [17–21].
In chemical activation,as a general trend,the adsorption capacity and,consequently,the porosity development,increase with increasing the hydroxide/carbon ratio.Additionally,the knee of the isotherms widens with the increase of the hydroxide/carbon ratio,thus indicating an increase of the micropore size distribution.The differences between KOH and NaOH activations have been shown to be dependent on the structure of the precursor as it has been previously reported [18,19,27].
The comparison between the total micropore volume,VDR(N2),and the narrow micropore volume,VDR(CO2),gives information of the micropore size distribution [22–25].Micropores smaller than 0.7 nm in size are measured by VDR(CO2),and those smaller than 2 nm and bigger than 0.7 nm are calculated by the difference between VDR(N2) and VDR(CO2).In activated samples from anthracite and Donacarbo,low hydroxide/ carbon ratios give VDR(CO2) > VDR(N2) which indicates that very narrow microporosity has been developed.As this ratio increases,the mean pore size is higher.Moreover,it is important to note that Donacarbo samples activated with NaOH develop wider microporosity than those activated with KOH.For Hexcel activated samples,the micropore size distribution is wider in all the cases compared to the other precursors (i.e.,anthracite and Donacarbo).Activated carbon fibres prepared by physical activation with CO2 (Donacarbo samples) and with steam (Kureha samples),are essentially microporous.The micropore size distribution is narrow at low burnoffs and becomes wider with increasing the burnoff.Another remarkable finding is that the micropore size distributions obtained by physical activation are wider than by chemical activation with KOH or NaOH.
In summary,a large number of porous carbons (powder and fibres) were prepared in our laboratory from different precursors and using four activating agents at different experimental conditions,which cover a wide range of porosities and surface areas (from 200 to 3000 m2/g).

Progress in Synthesis of Micro- and Mesoporous Composite Molecular Sieve

英语翻译
1.porous fruits 2.layers of rabbit 3.medallion of beef 4.if you are cooking a medallion of cod,you don't want to flatten it out.5.cooking a braise cut sous vide at 65.5℃ for a longer time,however,serves to break down the collagen without squeezing out all the juices,resulting in meat that is as tender as that from a traditional braise but more flavorful.求高手翻译.

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Solar absorptivity of nano-porous anodic alumina (NPAA): effects of structural features