scholarly journals PHYSICO-CHEMICAL FEATURES OF CATALASE BIOMIMETIC SENSORS

2020 ◽  
pp. 65-68
Author(s):  
N.N. Malikova ◽  
◽  
N.I. Ali-zade ◽  
T.M. Nagiev ◽  
◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
High Activity ◽  
Smart Material ◽  
Trace Concentration ◽  
Physico Chemical ◽  
Physicochemical Features ◽  
Biomimetic Sensor

The physicochemical features of biomimetic sensor have been studied, using various materials as a transducer. It is shown that biomimetic sensor prepared on the basis of a smart material and semiconductors had a number of technological advantages. It was found that among the selected various materials, the biomimetic sensor prepared from the smart material TPhPFe3+OH/Al2O3 and the semiconductor Si proved to be the most effective. The developed biomimetic sensor is differed by high activity, sensitivity, stability and reproducibility with the possibility of expanding the range of detectable trace concentration of H2O2 in aqueous solutions to 10-6 mass %

Physico-chemical study of aqueous solutions of electrolytes in mixed solvents

2006 ◽  
Vol 38 (11) ◽  
pp. 1474-1478 ◽  
Author(s):  
Monimul Huque ◽  
Iqbal Ahmed Siddiquey ◽  
Md. Nizam Uddin
Keyword(s):  
Aqueous Solutions ◽  
Mixed Solvents ◽  
Chemical Study ◽  
Physico Chemical ◽  
Solutions Of Electrolytes

scholarly journals Physico-Chemical Investigations in the Amide Group

1906 ◽  
Vol 25 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Charles E. Fawsitt
Keyword(s):  
Aqueous Solutions ◽  
Carboxylic Acids ◽  
Amide Group ◽  
Chemical Dynamics ◽  
Physico Chemical ◽  
Other Substances ◽  
The Subject

Some time ago, while studying the chemical dynamics of the changes which occur in solutions of urea or carbamide, I came upon some rather unexpected results which led me to hope that investigations conducted on somewhat the same lines with other substances of the amide group might prove to yield results of some interest. The amides referred to are those derived from carboxylic acids. While proceeding to this investigation I noticed some measurements, obtained in connection with the viscosity of aqueous solutions of carbamide, which appeared of sufficient interest to demand an inquiry into the nature of solutions of this class of substances before proceeding further with the subject of inquiry in the manner at first intended.

scholarly journals The Simultaneous Removal of Zinc and Cadmium from Multicomponent Aqueous Solutions by Their Sorption onto Selected Natural and Synthetic Zeolites

Minerals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 343 ◽  
Author(s):  
Bożena Kozera-Sucharda ◽  
Barbara Gworek ◽  
Igor Kondzielski
Keyword(s):  
Aqueous Solutions ◽  
Low Cost ◽  
Environmental Pollutants ◽  
Chemical Properties ◽  
Simultaneous Removal ◽  
Physico Chemical ◽  
Synthetic Zeolites ◽  
Sorption Mechanisms ◽  
Synthetic Aluminosilicate ◽  
Natural And Synthetic

Natural and synthetic aluminosilicate minerals, in particular zeolites, are considered to be very useful in remediation processes, such as purification of waters polluted with heavy metals. That is due to their unique and outstanding physico-chemical properties, rendering them highly efficient, low-cost, and environmentally friendly sorbents of various environmental pollutants. The aim of this study was to examine the sorption capacity of four selected zeolites: A natural zeolite and three synthetic zeolites (3A, 10A, and 13X), towards zinc and cadmium present in multicomponent aqueous solutions, in relation to identified sorption mechanisms. It was stated that synthetic zeolites 3A and 10A were the most efficient in simultaneous removal of zinc and cadmium from aqueous solutions. Additionally, zeolite 10A was demonstrated to be the mineral best coping with prolonged pollution of water with those elements. The mechanism of sorption identified for tested minerals was physisorption.

Permanent physico-chemical properties of extremely diluted aqueous solutions of homeopathic medicines

Homeopathy ◽  
2004 ◽  
Vol 93 (3) ◽  
pp. 144-150 ◽  
Author(s):  
V. Elia ◽  
S. Baiano ◽  
I. Duro ◽  
E. Napoli ◽  
M. Niccoli ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Chemical Properties ◽  
Physico Chemical ◽  
Extremely Diluted Aqueous Solutions

Photocatalytic properties of MIn(WO4)2 (M = Li, Na, and K)

2007 ◽  
Vol 22 (4) ◽  
pp. 958-964 ◽  
Author(s):  
Zhaosheng Li ◽  
Jinhua Ye ◽  
Zhigang Zou
Keyword(s):  
Solid State ◽  
Aqueous Solutions ◽  
High Activity ◽  
Solid State Reaction ◽  
Pure Water ◽  
Solid State Reaction Method ◽  
Photocatalytic Properties ◽  
Conventional Solid State Reaction ◽  
Reaction Method ◽  
Conduction Bands

MIn(WO4)2 (M = Li, Na, and K) with InO6 and WO6 octahedra were synthesized via a conventional solid-state reaction method. The photophysical and photocatalytic properties were studied. Compared with WO3, which is unable to evolve H2 from an aqueous CH3OH solution under illumination, the three materials can evolve H2 and O2 from aqueous solutions with CH3OH and AgNO3 sacrificial reagents, respectively. The activity order of photocatalytic H2 evolution is NaIn(WO4)2 > LiIn(WO4)2 > KIn(WO4)2 under irradiation (λ > 200 nm). Under irradiation (λ > 300 nm), however, LiIn(WO4)2 has a high activity for photocatalytic H2 evolution over NaIn(WO4)2. It is also noteworthy that LiIn(WO4)2 and NaIn(WO4)2 exhibit the ability to split pure water. The results suggest that the bottoms of the conduction bands in these photocatalysts are raised to meet the potential requirements of photocatalytic H2 evolution.

Mordanting of mercury on styrene-divinylbenzene copolymer beads from aqueous solutions

2007 ◽  
Vol 95 (5) ◽  
Author(s):  
Nasir Khalid ◽  
Saqib Ali ◽  
Arif Iqbal ◽  
Shujaat Ahmad
Keyword(s):  
Aqueous Solutions ◽  
Contact Time ◽  
Aqueous Media ◽  
Mercury Ions ◽  
Chemical Parameters ◽  
Radiotracer Technique ◽  
Physico Chemical ◽  
Styrene Divinylbenzene ◽  
Selection Of

The sorption of mercury ions from aqueous solutions on styrene-divinylbenzene copolymer beads (St-DVB) has been investigated for the decontamination of mercury from aqueous media. Various physico-chemical parameters, such as selection of appropriate electrolyte, contact time, amount of adsorbent, concentration of adsorbate, effect of diverse ions and temperature were optimized to simulate the best conditions which can be used to decontaminate mercury from aqueous media using St-DVB beads as an adsorbent. The radiotracer technique was used to determine the distribution of mercury. The highest adsorption was observed at 0.001 mol L

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