Diosgenin-selective molecularly imprinted pearls prepared by wet phase inversion

2013 ◽  
Vol 73 (9) ◽  
pp. 1188-1197 ◽  
Author(s):  
Stefan-Ovidiu Dima ◽  
Walid Meouche ◽  
Tanase Dobre ◽  
Tanta-Verona Nicolescu ◽  
Andrei Sarbu
Keyword(s):  
Phase Inversion ◽  
Molecularly Imprinted ◽  
Wet Phase Inversion

Influences of Preparative Conditions on Properties of Erythromycin-Molecularly Imprinted Membrane

2009 ◽  
Vol 87-88 ◽  
pp. 119-124
Author(s):  
Ping Guan ◽  
Xiao Ling Hu ◽  
Ya Mei Zhao
Keyword(s):  
Ethyl Alcohol ◽  
Phase Inversion ◽  
Extraction Time ◽  
Cross Linking ◽  
Functional Monomer ◽  
Absolute Ethyl Alcohol ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Wet Phase Inversion ◽  
Molecularly Imprinted Membrane

Erythromycin molecularly imprinted membranes (EM-MIMs) were prepared by wet phase inversion from imprinted polymers which were prepared by MAA as functional monomer, AN as membrane monomer and EDMA as crosslinker in the presence of erythromycin as template. The influences of the proportion of EM and MAA, cross-linking use level, different initiators and use level as well as extraction time on the imprinted sites and specific separation of EM-MIMs for EM were investigated. The results show that EM-MIMs were provided with more imprinted sites and more excellent separation properties for EM when adding MAA 0.0461mol, EM 0.724mmol, AIBN and (NH4)2S2O8 each 0.12g as initiators, and the mole ratio of EDMA and MAA at 5:1. The extraction of templates was carried out by using absolute ethyl alcohol as eluant and ultrasonic oscillating for 40min.

scholarly journals Molecularly Imprinted Polymer Pearls Obtained by Phase Inversion for the Selective Recognition of Hypericin

2019 ◽  
Vol 56 (2) ◽  
pp. 315-320
Author(s):  
Ana-Mihaela(Florea) Gavrila ◽  
Tanta-Verona Iordache ◽  
Teodor Sandu ◽  
Anamaria Zaharia ◽  
Anita-Laura Radu ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Phase Inversion ◽  
High Performance ◽  
Extraction Procedure ◽  
Inversion Method ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Wet Phase Inversion ◽  
Uv Visible ◽  
Phase Inversion Method

A facile and inexpensive approach was established to prepare spherical molecularly imprinted polymers with hypericin (H-MIPs) via the wet-phase inversion method. The H-MIPs were characterized by infrared spectroscopy and thermogravimetric analysis. High-performance liquid chromatography combined with UV-Visible spectroscopy were used to assess the efficiency of the extraction procedure and, furthermore, to investigate the recognition properties of the H-MIPs. Obtaining an imprinting factor of 3.38 for hypericin strongly indicated a successful formation of molecularly imprinted cavities onto the H-MIPs. A fair selectivity towards hypericin was tested in comparison to the interfering molecule pseudohypericin.

scholarly journals Evaluation of Molecularly Imprinted Polymer Pearls for Selective Isolation of Hypericins

2017 ◽  
Vol 54 (3) ◽  
pp. 495-501 ◽  
Author(s):  
Ana Mihaela Florea ◽  
Tanta Verona Iordache ◽  
Anamaria Zaharia ◽  
Bianca Georgescu ◽  
Andreea Elena Voicu ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Phase Inversion ◽  
Hypericum Perforatum ◽  
Thermal Analyses ◽  
Selective Isolation ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Wet Phase Inversion ◽  
Hypericum Perforatum L

This article describes the evaluation of molecularly imprinted polymers (MIPs) obtained by wet phase inversion for facile separation of hypericins from Hypericum perforatum L. (or Saint John�s Wort, SJW). In this respect, concentrated extracts containing hypericin and pseudohypericin were used as �phyto-templates� for creating selective cavities into the pearl shaped MIPs. The obtained MIPs were characterized by infrared and by thermal analyses. Chromatographic evaluation of the MIPs was performed relative to blank samples and it was concluded that the pearls can retain selectively the hypericins from SJW extracts.

scholarly journals Modification of PLA Scaffold Surface for Medical Applications

2021 ◽  
Vol 11 (4) ◽  
pp. 1815
Author(s):  
Michał Młotek ◽  
Agnieszka Gadomska-Gajadhur ◽  
Aleksandra Sobczak ◽  
Aleksandra Kruk ◽  
Michalina Perron ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Phase Inversion ◽  
Barrier Discharge ◽  
Polar Component ◽  
Medical Applications ◽  
Specific Chemical ◽  
Dielectric Barrier ◽  
Angle Measurements ◽  
Wet Phase Inversion ◽  
Materials Used

Materials used for medical applications (e.g., the cellular scaffold) should have not only the specific chemical composition, but the surface layer properties as well. For this reason, a method which enables an increase in the number of pores, wettability of the surface, and improvement the conditions of nutrient transportation into the membrane is being studied. The plasma of a dielectric barrier discharge was applied for the surface modification of polylactide obtained by dry or wet phase inversion. The plasma-modified surface was analyzed by contact angle measurements with water and diiodomethane. The surface free energy (SFE) was calculated by the Owens–Wendt method. The highest SFE and its polar component (67.6 mJ/m2 and 39.5 mJ/m2, respectively) were received when the process was conducted in an Ar + CO2 gas mixture with a discharge power of 20 W. The purpose of this research was to increase the wettability and porosity of the membrane’s surface. It can be concluded that the dielectric barrier discharge can effectively change the surface of the polylactide membranes, and that the structure of the modified membranes was not damaged during modification. The process of modification was easier for the membranes made by dry phase inversion. These materials had higher SFE values after the modification.

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