Synthesis of a SiO2/TiO2 hybrid boronate affinity monolithic column for specific capture of glycoproteins under neutral conditions

The Analyst ◽  
2014 ◽  
Vol 139 (5) ◽  
pp. 987-991 ◽  
Author(s):  
Qin Yang ◽  
Dihui Huang ◽  
Ping Zhou
Keyword(s):  
Aqueous Solution ◽  
Monolithic Column ◽  
Specific Capacity ◽  
Neutral Ph ◽  
Neutral Conditions ◽  
Hybrid Monolithic Column

A unique boronate-functionalized SiO2/TiO2 hybrid monolithic column was synthesized by a facile approach. The monolith exhibited specific capacity to capture glycoproteins and antibodies in aqueous solution at neutral pH.

scholarly journals Photodegradation of fluoroquinolones in aqueous solution under light conditions relevant to surface waters, toxicity assessment of photoproduct mixtures.

2021 ◽  
Author(s):  
Sarka Klementova ◽  
Martina Poncarová ◽  
Helena Langhansová ◽  
Jaroslava Lieskovská ◽  
David Kahoun ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Antibacterial Activity ◽  
Surface Waters ◽  
Ph Value ◽  
Reaction System ◽  
Photochemical Degradation ◽  
Alkaline Ph ◽  
Light Conditions ◽  
E Coli ◽  
Neutral Ph

Abstract Photochemical degradation of fluoroquinolones ciprofloxacin, enrofloxacin and norfloxacin in aqueous solution under light conditions relevant to surface waters at neutral and alkaline pH was found to proceed readily with half-lives between 0.9 and 2.7 min. The products of photochemical degradation identified by HPLC-MS included defluorinated, hydroxylated, and decarboxylated structures as well as structures with opened cyclic structures. For all of the studied substances, the reaction pathways were influenced significantly by the pH of the reaction system, with more products formed at alkaline pH than at neutral pH: the ratios of products in neutral and alkaline pH were 16/26, 9/19, 15/23 for ciprofloxacin, enrofloxacin, and norfloxacin, respectively. The structures of photoproducts and pathways of photochemical degradation are proposed. The antibacterial activities of photoproduct mixtures tested on E. coli and S. epidermidis were significantly higher in comparison to parental antibiotics in the case of both ciprofloxacin and enrofloxacin with p-values less than 0.0001 in most cases. The effect of the photoproducts was shown to be dependent on the pH value of the original antibiotic solutions before photodegradation: for ciprofloxacin, antibacterial activity against E. coli was more notably pronounced with regard to neutral pH photoproducts, while a less significant, or in one case not significant, effect of pH was observed against S. epidermidis ; for norfloxacin, antibacterial activity against both E. coli and S. epidermidis were especially high with regard to alkaline pH photoproducts

One-pot preparation of an acryloyled β-cyclodextrin-silica hybrid monolithic column and its application for determination of carbendazim and carbaryl

2018 ◽  
Vol 269 ◽  
pp. 181-186 ◽  
Author(s):  
Ling Chen ◽  
Ming Li ◽  
Youhong Ai ◽  
Xueping Dang ◽  
Jianlin Huang ◽  
...  
Keyword(s):  
Monolithic Column ◽  
One Pot ◽  
Hybrid Monolithic Column ◽  
Silica Hybrid

scholarly journals A high-performance oxygen evolution catalyst in neutral-pH for sunlight-driven CO2 reduction

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Li Qin Zhou ◽  
Chen Ling ◽  
Hui Zhou ◽  
Xiang Wang ◽  
Joseph Liao ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
High Performance ◽  
Specific Activity ◽  
Co2 Reduction ◽  
Poor Performance ◽  
Electrolysis Cell ◽  
Neutral Ph ◽  
Highly Active ◽  
Order Of Magnitude ◽  
Neutral Conditions

Abstract The efficiency of sunlight-driven reduction of carbon dioxide (CO2), a process mimicking the photosynthesis in nature that integrates the light harvester and electrolysis cell to convert CO2 into valuable chemicals, is greatly limited by the sluggish kinetics of oxygen evolution in pH-neutral conditions. Current non-noble metal oxide catalysts developed to drive oxygen evolution in alkaline solution have poor performance in neutral solutions. Here we report a highly active and stable oxygen evolution catalyst in neutral pH, Brownmillerite Sr2GaCoO5, with the specific activity about one order of magnitude higher than that of widely used iridium oxide catalyst. Using Sr2GaCoO5 to catalyze oxygen evolution, the integrated CO2 reduction achieves the average solar-to-CO efficiency of 13.9% with no appreciable performance degradation in 19 h of operation. Our results not only set a record for the efficiency in sunlight-driven CO2 reduction, but open new opportunities towards the realization of practical CO2 reduction systems.

A novel C18 reversed phase organic–silica hybrid cationic monolithic capillary column with an ionic liquid as an organic monomer via a “one-pot” approach for capillary electrochromatography

RSC Advances ◽  
2014 ◽  
Vol 4 (30) ◽  
pp. 15518-15525 ◽  
Author(s):  
Guozhen Fang ◽  
Hailong Qian ◽  
Qiliang Deng ◽  
Xuqin Ran ◽  
Yukun Yang ◽  
...  
Keyword(s):  
Capillary Electrochromatography ◽  
Capillary Column ◽  
Monolithic Column ◽  
Reversed Phase ◽  
One Pot ◽  
Organic Silica ◽  
Hybrid Monolithic Column ◽  
Monolithic Capillary Column ◽  
Silica Hybrid ◽  
Organic Monomer

A novel IL hybrid monolithic column with great potential in separation has been fabricated via a “one-pot” approach for capillary electrochromatography

Sign in / Sign up

Export Citation Format

Share Document