A basic problem of 
                
                    
                                    
                        (
                        p
                        ,
                        q
                        )
                    
                
                $(p,q)$
            -Bernstein-type operators

Cai, Qing-Bo; Xu, Xiao-Wei

doi:10.1186/s13660-017-1413-0

Cited by 13 publications

(9 citation statements)

References 16 publications

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“…POMs have been used as catalysts in organic reactions such as the nitration of phenols and the acetylation of alcohols and phenols. [13] For instance, [(C 4 H 9 ) 4 N] 5 [PW 11 CuO 39 (H 2 O)] was used as a POM catalyst for the liquid-phase oxidation of benzene to phenol and 9.2% benzene conversion and 91.8% selectivity to phenol was reported. [31] Because of reversible electrochemistry, light weight and polymeric nature, multi-electron reactions, and stability in the wide range of pH values and temperatures, POMs are good options as stationary storage materials. )…”

Section: Non-photocatalytic Applications Of Pomsmentioning

confidence: 99%

“…The energy levels of conduction and valence bands of POMs and g-C 3 N 4 were considered an effective factor in the improved photocatalytic performance. [56] Iron-containing POM (Fe III LysSiW) was synthesized with a chemical formula of [Fe(H 2 O) 5 4À hetero-polyanion and lysine moiety. The prepared composite showed good performance in 4-chlorophenol degradation by H 2 O 2 in both dark and irradiated systems.…”

Section: Application Of Poms and Their Composites In The Degradation mentioning

confidence: 99%

“…Photocatalytic decomposition of sulfamethoxazole and trimethoprim in a continuous photoreactor using TiO 2 under light emitted diode (LED)/UVA was investigated by Cai and Hu. [5] More than 90% of sulfamethoxazole and trimethoprim were eliminated after 20 min irradiation with the initial concentration of 400 ppb. Antibacterial study with a reference Escherichia coli strain was also performed during the photocatalytic process.…”

Section: Introductionmentioning

confidence: 99%

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Polyoxometalates and Their Composites as Photocatalysts for Organic Pollutants Degradation in Aqueous Media—A Review

Dehghani

Aber

Mahdizadeh

2018

CLEAN Soil Air Water

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Polyoxometalates (POMs), eco‐friendly solid acids, are polyatomic anions containing transition metal (group 5 or group 6) oxyanions linked together through shared oxygen atoms. First, the structure, classification, synthesis, non‐photocatalytic applications, and their photocatalytic properties and applications are presented. POMs are very interesting due to their unique and remarkable characteristics. One of the most attractive characteristics of POMs is their activity as an electron relay, that is, they can undergo stepwise multi‐electron redox reactions while their construction remains intact. Based on this characteristic, POMs have been widely used as photooxidation catalysts for organic and inorganic contaminants removal. According to the literature, POMs are useful homogeneous photocatalysts for the mineralization of dyes, phenol and its derivatives, chloroacetic acids, and pesticides and wood pulp bleaching. Applications of POMs have been limited because of their high solubility in water. Immobilization and solidification of POMs using different methods and various supports for making them reusable are studied in this review. Varieties of composites of POMs are synthesized to make them photorespond to the visible light region.

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Section: Non-photocatalytic Applications Of Pomsmentioning

confidence: 99%

Section: Application Of Poms and Their Composites In The Degradation mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polyoxometalates and Their Composites as Photocatalysts for Organic Pollutants Degradation in Aqueous Media—A Review

Dehghani

Aber

Mahdizadeh

2018

CLEAN Soil Air Water

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“…A variety of different supports (including zeolites, mesoporous materials, metal oxides and fl uorides) were applied for Sonogashira couplings by Djakovitch and coworkers; however, the available substrate range was limited to aryl iodides and bromides in this case [195 -197] . Cai and coworkers reported reactions of aryl iodides at room temperature in the presence of an MCM -41 -supported Pd catalyst [198] . Application of ligand -free Pd/C in the Sonogashira reaction of aryl iodides was reported by Heidenreich et al [158] , Kotschy and coworkers [199] and Zhang [200] .…”

Section: Supported Palladium Catalysts In Other Coupling Reactionsmentioning

confidence: 99%

The Role of Palladium Nanoparticles as Catalysts for Carbon–Carbon Coupling Reactions

Djakovitch¹,

Köhler²,

Vries³

2007

Nanoparticles and Catalysis

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“…The plant alkaloid nicotine is an amine composed of pyridine and pyrrolidine rings (heterocyclic amines). It is a pharmacologically active substance found in tobacco [2][3][4]. Metabolism of nicotine in human beings yields cotinine as the major product.…”

Section: Introductionmentioning

confidence: 99%

Determination of nicotine and its metabolites accumulated in fish tissue using hydrophilic interaction liquid chromatography coupled with tandem mass spectrometry

Chang

Nguyen

Chang

et al. 2015

J of Separation Science

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The determination of nicotine and its major metabolites (cotinine and anabasine) in fish tissue was performed using liquid chromatography and tandem mass spectrometry. Marine and freshwater fish were purchased from local grocery stores and were prepared based on a quick, easy, cheap, effective, rugged, and safe sample preparation protocol. To determine the highly polar compounds, hydrophilic interaction liquid chromatography was also used. There were modest suppressions on measured nicotine signals (10%) due to the matrix effects from marine fish but no obvious effects on freshwater fish signals. Method validation was incorporated with internal standards and carried out with matrix-matched calibration. The detection limits for nicotine, cotinine, and anabasine were 9.4, 3.0, and 1.5 ng/g in fish, respectively. Precision was quite acceptable returning less than 8% RSD at low, medium, and high concentrations. Acceptable and reproducible extraction recoveries (70-120%) of all three compounds were achieved, except for anabasine at low concentration (61%). The method was then applied to define nicotine bioaccumulation in a fathead minnow model, which resulted in rapid uptake with steady state internal tissue levels, reached within 12 h. This developed method offers a fast, easy, and sensitive way to evaluate nicotine and its metabolite residues in fish tissues.

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A basic problem of ( p , q ) $(p,q)$ -Bernstein-type operators

Cited by 13 publications

References 16 publications

Polyoxometalates and Their Composites as Photocatalysts for Organic Pollutants Degradation in Aqueous Media—A Review

Polyoxometalates and Their Composites as Photocatalysts for Organic Pollutants Degradation in Aqueous Media—A Review

The Role of Palladium Nanoparticles as Catalysts for Carbon–Carbon Coupling Reactions

Determination of nicotine and its metabolites accumulated in fish tissue using hydrophilic interaction liquid chromatography coupled with tandem mass spectrometry

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