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; therefore, SFC has lower mass transfer resistance between stationary phase and mobile phase than HPLC. The viscosity of SF is close to that of gas, and the density is similar to that of certain liquid, which facilitates lower pressure drop at relatively high
precisely specified points along the reactor (residence time). The high heat exchange efficiency allows rapid change of reaction conditions. The pressure resistance enables operation in superheated solvents. A, B, C, D = reagents; I = intermediates; P
materials and have many advantages such as highly porous structure, nonhindered diffusion of solutes, very low flow resistance, very short residence time for both adsorption and elution; (2) to use as the alternative solid-phase extraction sorbent to extract
resistance to a huge variation of temperatures and pHs, an advantage against the most varied conditions required for enzymatic reactions, and the inhibitory action upon trypsin may put this inhibitor as a biopharmacological candidate. Considering that
nano-sorbents have proved to be especially effective because of their high specific surface areas, highly active surface sites, and the absence of internal diffusion resistance in the separation process [ 9 ]. Magnetic nanoparticles (MNPs) have
acid were obtained from Merck Company (Darmstadt, Germany). Ultrapure water (resistance >18 MΩ) was prepared by Milli-Q purification system (Bedford, USA). Figure 1. Chemical structure of panasenoside (A
composed of uronic acid residues which are linked together by α -1, 4-glycosidic bonds [ 2 ]. The pectin is favored in formulations due to its resistance property against certain enzymes such as amylase and protease but a disadvantage of the early drug
sulfate (SDS) with purity of 97% was purchased from Macklin Biochemical Co., Ltd. (Shanghai, China). Ultrapure water with the specific resistances of 18.2 MΩ·cm was produced by a Milli-Q ultrapure water system (Millipore, Bedford, MA, USA) for aqueous
[ 1 – 5 ]. The sieve-molecular properties, availability of strongly active surface sites, high resistance to acids and other useful properties of zeolites allow the use of them as catalysts in cracking, hydrocracking, isomerization and other processes
Introduction Advanced ceramic materials are used in variety industries, especially in optoelectronics, metallurgy, medicine, and space industry due to their high thermal resistance, hardness and other unique properties. The key
