macroporous resin

macroporous resin

[¦mak·rə¦pȯr·əs ′rez·ən]
(organic chemistry)
A member of a class of very small, highly cross-linked polymer particles penetrated by channels through which solutions can flow; used as ion exchanger. Also known as macroreticular resin.
References in periodicals archive ?
Before use, the AB-8 macroporous resin was soaked in 95% ethanol for 24 h and washed several times using the deionized water.
Their total and individual content of flavonoids were determined by combining macroporous resin chromatography with high-performance liquid chromatography (MPRC-HPLC) method, which was developed for the simultaneous enrichment and analysis of flavonoids from lotus leaves, recently [18].
The ferments were centrifuged (10,000g, 30min, 4[degrees]C), and the cell-free supernatant was absorbed with the macroporous resin D4020 (average pore diameter 100-105 [Angstrom], specific surface area of 540-580 [m.sup.2]/g, Nankai University Chemical Factory, China).
The highly polar antioxidants were firstly isolated and purified from Chirita longgangensis by combination of macroporous resin and HSCCC (Duan et al., 2014).
Methods: Chemical constituents were extracted and purified by ethanol reflux extraction and chromatographic separation technology including D-101 Macroporous resin, silica gel, Sephadex LH-20 and preparative thin-layer chromatography.
TLC silica gel GF-254 and column chromatography silica gel (200-mesh) were both manufactured by Xindi Chemical Plant in Yantai; RPTLC plates were products of Merck, Germany; Sephadex LH-20 was a product of Pharmacia; RP-18 reversed phase silica gel was a product of Great Door, Germany; MCI GEL CHP-20P was a product of Mitsubishi Chemical; and D101 macroporous resin is a product of Dashi Technology Development Co., Ltd.
Crude extract of summer green tea obtained by hot water extraction was passed through columns of polyamide and NKA-II macroporous resin respectively, resulting in tea polyphenols-enriched fraction (96.27 A+- 1.78%), theanine-enriched fraction (99.02 A+- 0.43%) and caffeine-enriched fraction (99.25 A+- 0.36%).
The macroporous resins NKA-11 was used for chromatography of the crude extract L The macroporous resin NKA-11 is a kind of cross-linked polystyrene with polarity.
giganteum could significantly prolong the survival time of myocardial hypoxia mice, fractions eluted by 50% EtOH in NKA-9 type macroporous resin could significantly prolong the survival time in myocardial hypoxia mice, but also to improve the biochemical indicators of myocardial ischemia mice, so extraction process using 60% EtOH should be a more reasonable extraction method, the eluted material with 50% EtOH in macroporous resin should be the active friction.
The extract was concentrated under reduced pressure, and then dissolved in 30% ethanol to give 1 g/ml (crude medicine/volume) sample liquor, and then this liquor was passed through AB-8 macroporous resin column with 1 time the volume which was comparable to the weight of macroporous resin.
Actually, fast kinetics can be expected in applications of macroporous resins. In addition, high ligand concentration, 1 mmol [g.sup.-1] resin, used in impregnation may increase selectivity of the resin which can also be a reason for fast sorption rate.