An efficient environmentally friendly CuFe2O4/SiO2 catalyst for vanillyl mandelic acid oxidation in water under atmospheric pressure and a mechanism study

2021 ◽  
Author(s):  
Haifang Mao ◽  
Hongzhao Wang ◽  
Tao Meng ◽  
Chaoyang Wang ◽  
Xiaojun Hu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Atmospheric Pressure ◽  
Mandelic Acid ◽  
Environmentally Friendly ◽  
Acid Oxidation ◽  
Mechanism Study ◽  
Nano Catalyst ◽  
Green Production ◽  
Vanillyl Mandelic Acid ◽  
Oxidation System

Aimed at the green production of vanillin, a highly efficient environmentally friendly oxidation system was introduced to oxidize VMA with a porous CuFe2O4/SiO2 component nano-catalyst in aqueous solution under atmospheric pressure.

Analyzing sensitivity of the energy metabolism in the tissues of the heart, liver, kidney, and blood lymphocytes in rats to the effect of local vibration and pharmacological protection by a succinate-containing antihypoxanth

2021 ◽  
Vol 61 (2) ◽  
pp. 84-89
Author(s):  
Viktoriya V. Vorobyova ◽  
Olga S. Levchenkova ◽  
Petr D. Shabanov
Keyword(s):  
Succinic Acid ◽  
Respiratory Chain ◽  
Power Plants ◽  
Acid Oxidation ◽  
Myocardial Tissue ◽  
Local Vibration ◽  
Tissue Specific ◽  
Blood Lymphocytes ◽  
Oxidation System ◽  
Dependent Link

Introduction. Modern technological processes that generate ultra- and infrasound, electromagnetic, vibration-noise radiation significantly exceed the background effects and inevitably create an unfavorable technogenic load on the human body. A special place is occupied by vibration, primarily associated with such professional groups as mining enterprises, gold and diamond processing plants, aircraft plants, thermal power plants and hydroelectric power plants, and aluminum industry enterprises. Vibration exposure leads to a number of biochemical disorders in the homeostasis system. Mitochondrial dysfunctions are among the leading elements in the hierarchy of pathogenesis of many pathological syndromes and diseases. The aim of the study was an experimental analysis of tissue-specific features of the myocardium, kidneys, liver energy production system activity as well as the enzyme status of rat lymphocytes in relation to the activity of succinate dehydrogenase (SDH) on the background of 7 episodes of local vibration with a frequency of 27-30 Hz for 90 minutes daily before and after protection with succinate-containing antihypoxant "Yantar-cardio" at a dose of 100 mg/kg/day. Materials and methods. The study of the energy-dependent reactions of the native mitochondria of the organs was carried out by the polarographic method using a closed Clark-type membrane electrode. The activity of SDH of rat blood lymphocytes was studied by a modified method of quantitative cytochemical analysis. Results. Functional rearrangement in the respiratory chain (RC) of the mitochondria confirmed the NAD-dependent site's inhibition and activation of the oxidation system of endogenous succinic acid, most pronounced in the myocardial tissue. On the vibration background, the specific SDH activity of lymphocytes (Q) significantly increased by 52%, and the variability (V) - by three times. The use of "Yantar-cardio" limited the growth rate of endogenous respiration of the most significant in the heart (70%, p<0.05), restored oxidative and conjugating activity NAD-dependent link of RC, improve the structure and condition of the cell population of lymphocytes based on their energy status and warned the mismatch of the leading parameters of the population variability of the cellular pool of blood lymphocytes in experimental animals. Conclusions. The intensity of vibration-mediated bioenergetic hypoxia in the form of inhibition of the NAD-dependent link of the respiratory chain and activation of the endogenous succinic acid oxidation system is tissue-specific and is most pronounced in the myocardial tissue. The succinic acid oxidation system is highly sensitive to vibration effects and a pharmacological drug that supports the function of RC under conditions of the stress of the homeostatic functions of tissues involved in the pathological process.

Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime‐Functionalized Microspheres Silica Material: Kinetics, Isotherm and Mechanism Study

2018 ◽  
Vol 3 (43) ◽  
pp. 12346-12356 ◽  
Author(s):  
Jiang Xiao ◽  
Yan Jing ◽  
Xingquan Wang ◽  
Ying Yao ◽  
Yongzhong Jia
Keyword(s):  
Aqueous Solution ◽  
Mechanism Study ◽  
Silica Material

scholarly journals Adsorption of heavy metal ion from aqueous solution by nickel oxide nano catalyst prepared by different methods

2015 ◽  
Vol 24 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Amira M. Mahmoud ◽  
Fatma A. Ibrahim ◽  
Seham A. Shaban ◽  
Nadia A. Youssef
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Nickel Oxide ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Nano Catalyst

Environmentally Friendly Inorganic Magnetic Sulfide Nanoparticles for Efficient Adsorption-Based Mercury Remediation from Aqueous Solution

2018 ◽  
Vol 3 (6) ◽  
pp. 1840-1851 ◽  
Author(s):  
Khushbu Patel ◽  
Nimisha Singh ◽  
Jyotsna M. Nayak ◽  
Babli Jha ◽  
Suban K. Sahoo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Environmentally Friendly
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