Diverse functional groups decorated, bifunctional polyesteramide as efficient Pb(II) electrochemical probe and methylene blue adsorbent

2021 ◽  
Vol 160 ◽  
pp. 110810
Author(s):  
Daogui Wu ◽  
Wei Shi ◽  
Sheng Ding ◽  
Zhengfeng Xie
Keyword(s):  
Methylene Blue ◽  
Functional Groups ◽  
Electrochemical Probe

The action of rennin on casein: the effect of modifying functional groups on the casein

1965 ◽  
Vol 32 (2) ◽  
pp. 193-201 ◽  
Author(s):  
R. D. Hill ◽  
Raione R. Laing
Keyword(s):  
Methylene Blue ◽  
Amino Acid ◽  
Functional Groups ◽  
Amino Acid Analysis ◽  
Side Chains ◽  
Photo Oxidation

Summaryk-Casein and whole casein when photo-oxidized in the presence of methylene blue lose the ability to clot when treated with rennin. Two effects are involved—first the photo-oxidation alters the k-casein fraction so that the rennin is unable to split off the glycopeptide fragment, and secondly, in whole casein the photo-oxidation interferes with the aggregation in the presence of Ca++that normally follows rennin action. As a result of amino acid analysis and specific treatments which affect other photo-oxidizable side chains, it is concluded that both of these effects are caused by the alteration of histidines.

Wavelength-Regulated Stereodivergent Synthesis of (Z)- and (E)-1,4-Enediones from Phosphonium Ylides

2021 ◽  
Author(s):  
Mei Wang ◽  
Yongqin He ◽  
Yao Zhu ◽  
Zhi-Bin Song ◽  
Xiao-Yu Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Functional Groups ◽  
Organic Dye

A wavelength-regulated, organic dye methylene blue catalyzed stereodivergent synthesis of (Z)- and (E)-1,4-enediones from stabilized phosphorous ylides is reported. A broad range of substrates and functional groups are tolerated. Mechanistic...

A signal-off aptasensor for the determination of Ochratoxin A by differential pulse voltammetry at a modified Au electrode using methylene blue as an electrochemical probe

2017 ◽  
Vol 9 (37) ◽  
pp. 5449-5454 ◽  
Author(s):  
Min Wei ◽  
Shuo Feng
Keyword(s):  
Methylene Blue ◽  
Differential Pulse Voltammetry ◽  
Ochratoxin A ◽  
Differential Pulse ◽  
Au Electrode ◽  
Electrochemical Probe ◽  
Pulse Voltammetry

A signal-off aptasensor for OTA detection at an apt/cDNA/AuNPs/cPC/NH2–AuE electrode using methylene blue as an electrochemical probe.

scholarly journals Effect of synthesis conditions  on  methylene blue adsorption capacity of electrochemically preparated graphene

2020 ◽  
Vol 9 (3) ◽  
pp. 9-14
Author(s):  
Hao Pham Van ◽  
Linh Ha Xuan ◽  
Oanh Phung Thi ◽  
Hong Phan Ngoc ◽  
Huy Nguyen Nhat ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Functional Groups ◽  
Photoelectron Spectroscopy ◽  
Graphene Nanosheets ◽  
Electrochemical Exfoliation ◽  
X Ray ◽  
Synthesis Conditions ◽  
Mb Adsorption

This report presents the effect of synthesis conditions on the synthesis of graphene nanosheets via electrochemical exfoliation method for adsorbing methylene blue from aqueous solution. Oxygen-containing functional groups and defects in the material were characterized by Raman and X-ray photoelectron spectroscopy (XPS). As a result, by using voltage of 15 V, (NH4)2SO4 (5%, 250 mL) and KOH (7.5%, 250 mL), the obtained material showed the highest MB adsorption capacity due to the high densities of oxygen-containing groups and defects comparison to other conditions.

scholarly journals Bio-polishing sludge adsorbents for dye removal

2016 ◽  
Vol 18 (4) ◽  
pp. 15-21 ◽  
Author(s):  
Muhammad Abbas Ahmad Zaini ◽  
Norulaina Alias ◽  
Mohd. Azizi Che Yunus
Keyword(s):  
Methylene Blue ◽  
Specific Surface ◽  
Surface Area ◽  
Functional Groups ◽  
Specific Surface Area ◽  
Treatment Strategies ◽  
Blue Dye ◽  
Surface Functional Groups ◽  
Adsorption Capacities ◽  
Maximum Removal

Abstract The objective of this work is to evaluate the removal of methylene blue dye by bio-polishing sludge-based adsorbents. The adsorbents were characterized according to the specific surface area, pH upon the treatment and surface functional groups. The adsorption of dye was carried out at room temperature, and the adsorption data were analyzed using the isotherm and kinetics models. The bio-polishing sludge is rich in ash content, and the presence of surface functional groups varied with the treatment strategies. The specific surface area of adsorbents is between 7.25 and 20.8 m2/g. Results show that the maximum removal of methylene blue by sludge adsorbents was observed to have the following order: untreated sludge (SR) > zinc chloride-treated (SZ) > microwave-dried (SW) = potassium carbonate-treated (SK) > acid-washed (SH). The maximum adsorption capacities for SR and SZ as predicted by the Langmuir model are 170 and 135 mg/g, respectively. Although SR demonstrates a higher maximum removal than SZ, the latter exhibits greater removal intensity and rate constant even at high dye concentration. The bio-polishing sludge is a promising adsorbent for dye wastewater treatment.

Adsorption of methylene blue in water by reduced graphene oxide: Effect of functional groups

2013 ◽  
Vol 3 (4) ◽  
pp. 281-290 ◽  
Author(s):  
Lijuan Chen ◽  
Jingjing Yang ◽  
Xiaopeng Zeng ◽  
Lizhen Zhang ◽  
Wenxia Yuan
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Functional Groups ◽  
Reduced Graphene

scholarly journals Agarose Hydrogels Enriched by Humic Acids as the Complexation Agent

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 687 ◽  
Author(s):  
Martina Klučáková
Keyword(s):  
Methylene Blue ◽  
Humic Substances ◽  
Functional Groups ◽  
Humic Acids ◽  
Diffusion Coefficients ◽  
Rhodamine 6G ◽  
Effective Diffusion ◽  
High Affinity ◽  
Effective Diffusion Coefficients ◽  
Complexation Agent

The transport properties of agarose hydrogels enriched by humic acids were studied. Methylene blue, rhodamine 6G and Cu(II) ions were incorporated into hydrogel as diffusion probes, and then their release into water was monitored. Cu(II) ions as well as both the dyes studied in this work have high affinity to humic substances and their interactions strongly affected their diffusion in hydrogels. It was confirmed that humic acids retarded the transport of diffusion probes. Humic acids’ enrichment caused the decrease in the values of effective diffusion coefficients due to their complexation with diffusion probes. In general, the diffusion of dyes was more affected by the complexation with humic acids in comparison with Cu(II) ions. The effect of complexation was selective for the particular diffusion probe. The strongest effect was obtained for the diffusion of methylene blue. It was assumed that metal ions interacted preferentially with acidic functional groups. In contrast to Cu(II) ions, dyes can interact with acidic functional groups, and the condensed cyclic structures of the dye probes supported their interactions with the hydrophobic domains of humic substances.

Adsorption of methylene blue on anaerobic granular sludge: Effect of functional groups

Desalination ◽  
2010 ◽  
Vol 263 (1-3) ◽  
pp. 11-17 ◽  
Author(s):  
Feifei Liu ◽  
Shaoxiang Teng ◽  
Ruihong Song ◽  
Shuguang Wang
Keyword(s):  
Methylene Blue ◽  
Functional Groups ◽  
Granular Sludge ◽  
Anaerobic Granular Sludge
Sign in / Sign up

Export Citation Format

Share Document