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Issue Info: 
  • Year: 

    2014
  • Volume: 

    18
  • Issue: 

    1
  • Pages: 

    41-48
Measures: 
  • Citations: 

    0
  • Views: 

    348
  • Downloads: 

    170
Abstract: 

Background: Nonalcoholic steatohepatitis (NASH), a progressive stage of nonalcoholic fatty liver disease (NAFLD), is characterized by steatosis with inflammation. Investigations have suggested that oxidative stress may play an important role in the progress of NAFLD to NASH. To provide further insights into beneficial effects of antioxidants in NASH prevention, we employed two MANGANESE-superoxide dismutase/catalase mimetics, MANGANESE N,N'-bis(salicyldene) ethylene diamine chloride (EUK-8) and MANGANESE-3-methoxy N,N' -bis(salicyldene) ethylenediamine chloride (EUK-134), as two salen representatives and vitamin C as the standard antioxidant.Methods: Experimental NASH was induced in Male N-Mary rats by feeding a methionine/cholinedeficient (MCD) diet to rats for 10 weeks. The rats (n=5, 30 mg/kg/day) were randomly assigned to receive vitamin C, EUK-8, EUK-134 or vehicle orally.Results: Administration of salens together with the MCD diet reduced the serum aminotransferases, glutathione transferase and alkaline phosphatase, cholesterol, and LDL contents. In addition, the EUK-8 and EUK-134 improved NASH pathological features in liver of MCD-fed rats.Conclusion: EUK-8 and EUK-134 supplementation reduces NASH-induced abnormalities, pointing out that antioxidant strategy could be beneficial for prevention of NASH.

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Issue Info: 
  • Year: 

    2011
  • Volume: 

    8
  • Issue: 

    2
  • Pages: 

    388-395
Measures: 
  • Citations: 

    0
  • Views: 

    298
  • Downloads: 

    152
Abstract: 

Two new MANGANESE COMPLEXES of {Mn[(2-py)CNOH]2Cl2} (1) and {Mn[(2-py)CNOH]2(OAc)2} (2) were synthesized and their structures were characterized by X-ray crystallography, IR spectroscopy and elemental analysis. Two COMPLEXES were used as bulk modifier to fabricate two carbon paste electrodes (Mn-CPE: 1-CPE and 2-CPE). The electrochemical behaviors of two modified electrodes were characterized by cyclic voltammetry. They have similar electrochemical behaviors and good electrocatalytic activities toward the reduction of hydrogen peroxide and nitrite. The results are reproducible with a lower detection limit than earlier reports. There exist a good linear relationship between peak current with the concentration in the range of 0.10-1.20 mM and a detection limit of 0.08 mM for hydrogen peroxide, and in the range of 0.02-0.10mM and a detection limit of 0.01mM for nitrite. Also Mn-CPE exhibits remarkable long term stability, simple preparation and inexpensive material, which is important for practical application on electrochemistry sensors.

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Issue Info: 
  • Year: 

    2013
  • Volume: 

    20
Measures: 
  • Views: 

    120
  • Downloads: 

    73
Keywords: 
Abstract: 

THE COORDINATION CHEMISTRY OF HETEROCYCLIC NITROGENEOUS LIGAND WAS STARTED BY F. BLAU.SINCE, THENLARGE VARIETIES OF HETEROCYCLIC MOLECULES, THEIR TRANSITIONAND NON-TRANSITION METAL COMPLEXES AND THEIR STRUCTURAL, CHEMICAL, ELECTROCHEMICAL, PHOTOPHYSICAL AND PHOTOCHEMICAL, CATALYTIC ETC....

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Issue Info: 
  • Year: 

    2008
  • Volume: 

    5
  • Issue: 

    2
  • Pages: 

    244-251
Measures: 
  • Citations: 

    0
  • Views: 

    401
  • Downloads: 

    211
Abstract: 

Rapid and efficient oxidation of Hantzsch 1,4-dihydropyridine with Potassium peroxomonosulfate is reported. The Mn (III)-salophen/monopersulfate catalytic system converts 1,4-dihydropyridines to their corresponding pyridine derivatives at room temperature in a 1:1, CH3CN/H2O mixture. The ability of various Schiff base COMPLEXES in the oxidation of 1,4-dihydropyridine was also investigated.

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Writer: 

FEIZI N. | AHMADI H.

Issue Info: 
  • Year: 

    2013
  • Volume: 

    16
Measures: 
  • Views: 

    107
  • Downloads: 

    52
Keywords: 
Abstract: 

IN THIS RESEARCH WORK LIGANDS OF NAPHTHOQUINONE WITH 1, 3 - DIAMINO PROPANE WERE SYNTHESIZED AND THEN MANGANESE COMPLEXES OF THOSE LIGANDS WERE PREPARED, BY SPECTROSCOPIC METHODS IR, UV, CHN ELEMENTAL ANALYSIS, AAS, TGA COMPLEXES WERE IDENTIFIED.FOUR ATOMS OF MN SEEM TO BE INTIMATELY INVOLVED IN THE FOUR-ELECTRON OXIDATION OF WATER TO DIOXYGEN BY THE ENZYME IN THE PHOTOSYNTHETIC APPARATUS OF GREEN PLANTS [1]. OXYGENIC PHOTOSYNTHESIS IS THE PROCESS WHEREBY PLANTS UTILIZE SUNLIGHT TO CATALYSE THE REDUCTION OF PLASTOQUINONE AND THE OXIDATION OFWATER INTO PROTONS AND MOLECULAR OXYGEN. THIS PROCESS IS INITIATED IN THE PIGMENT/PROTEIN COMPLEX CALLED PHOTOSYSTEM II (PSII) [2]. FOR A MAJORITY OF THE RELATED STUDIES, THE MOLECULAR ASPECTS OF THE CATALYSTS HAVE BEEN STUDIED TO PROVIDE HINTS FOR DEVELOPMENT OF AN EFFICIENT CATALYST, AS WELL AS TO GAIN CLUES TO REVEAL THE MECHANISM OF O2 EVOLUTION CATALYZED AT THE PHOTOSYNTHETIC OXYGEN EVOLVING COMPLEX (OEC) WHOSE ACTIVE SITE IS KNOWN TO CONSIST OF A TETRAMANGANESE-OXO CLUSTER [3-6]. MONOMERIC STRUCTURES OF THE PS (II) CAN BE SEEN IN FIGURE1 [7]. REACTIONS OF PHOTOSYNTHESIS CAN BE SUMMARIZED INTO (1) PROCESS.

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    23
Measures: 
  • Views: 

    192
  • Downloads: 

    266
Abstract: 

ELECTROCHEMICAL WATER SPLITTING TO LARGE-SCALE HYDROGEN GENERATION IS A PROMISING ROUTE FOR THE CONVERSION OF SUSTAINABLE, BUT INTERMITTENT ENERGIES.1 IN THE WATER SPLITTING, THE CATHODIC REACTION IS OF MAJOR INTEREST IN HYDROGEN PRODUCTION; HOWEVER, THE ANODIC REACTION IS COMPLICATED, INVOLVING FOUR PROTONS AND FOUR ELECTRONS, WITH A LIMITATION OF THE EFFICIENCY OF HYDROGEN GENERATION DUE TO THE NEED TO APPLY LARGE OVERPOTENTIAL. ...

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Issue Info: 
  • Year: 

    2023
  • Volume: 

    13
  • Issue: 

    3
  • Pages: 

    67-87
Measures: 
  • Citations: 

    0
  • Views: 

    145
  • Downloads: 

    24
Abstract: 

A B S T R A C T The current research is descriptive-analytical. In terms of purpose, it is in the category of applied research. Both library and field methods have collected the information required for this research. The statistical population of the research consisted of citizens living in Kasra, Azadi, Rezvan, Rahan, Hasht Behesht and Zeytoun residential COMPLEXES, which consisted of 6588 people, and the sample size according to the Cochran formula was 364. The study results of the studied residential COMPLEXES from the perspective of spatial connectivity indicators indicated that among the investigated COMPLEXES, Rahan residential complex had the lowest connectivity index compared to the rest of the COMPLEXES, and the highest share of this comparison goes to Kasra residential complex. From the comparison of the COMPLEXES based on the interconnection index, we conclude that the location of spaces and accesses in Rahan complex is very weak. Compared to the rest of the COMPLEXES, the location of access and communication in Kasra complex is lower. Moreover, Rezvan has been suitable and successful. It is said that the increase of connection in public spaces occurs with increase of sociability. Among the other results of this research, the spatial order component with the path coefficient value of 0.368 has the highest path coefficient among the investigated components. In the first place, the playability component with a path coefficient of 0.253 is in the second place, the multi-purpose component with a path coefficient of 231 0.0 in the third place, the security component with a path coefficient of 0.162 is in the fourth place and the environmental comfort component is in the fifth place with a path coefficient of 0.153 Extended Abstract Introduction In the public space of neighborhoods and residential environments, the issue of sociability has been less addressed. Public spaces can boost the social life of citizens by strengthening social interactions and being involved in social sustainability. The residential environment conveys the residents a sense of well-being and satisfaction through physical, social or symbolic features. In each residential complex, according to the different arrangements of the blocks in it, it is possible to reach different influential indicators of the public space in it, which, according to the way they are arranged, have different potentials from the point of view of sociability in them. Declining sociability causes many problems in relationships between people and reduces the sense of belonging to a place, security, and other issues caused by not paying attention to the quality of collective life in housing. The main question is: - What are the components of the spatial structure affecting the sociability of residential COMPLEXES in the city of Kermanshah?   Methodology The current research is descriptive-analytical. In terms of purpose, it is in the category of applied research. Two library and field methods have collected the information needed for this research. In the field method, primary data collection has been done according to the research questions by designing a 5-scale Likert scale questionnaire. The statistical population of the study consisted of citizens living in Kasra, Azadi, Rezvan, Rahan, Hasht Behesht and Zeytoun residential COMPLEXES, which consisted of 6588 people, and the sample size was estimated to be 364 people using the Cochran formula. Factors such as the ease of access to the COMPLEXES, the willingness and cooperation of the residents and the management of the COMPLEXES were also influential in selecting the samples studied in this research. In this research, in order to investigate the sociability of residential COMPLEXES based on the   theoretical framework prepared in the present research, the physical indicators affecting this issue include five indicators of "connectivity, interconnectedness, control, selection and depth" in each of The studied samples have been evaluated and analyzed in public spaces including the playground, gathering space, parking lot, and lobby. This research used Depthmap analytical software and structural equation modeling software to analyze the data.   Results and discussion In this research, the relation of sociability of public spaces of residential COMPLEXES in Kermanshah, which includes Kasra residential complex, Azadi residential complex, Rezvan residential complex, Rahan residential complex, Hasht Behesht residential complex and Zeytoun residential complex as the basis of the research case. Among the samples studied, Rahan residential complex has the lowest connectivity index compared to other COMPLEXES; the largest share of this comparison goes to Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the COMPLEXES based on the interconnection index, we conclude that the location of the spaces and accesses in the Rahan complex is very weak and lower than the rest of the COMPLEXES. According to the numbers extracted, Zeytoun complex and following that Kasra and Rezvan COMPLEXES are at the same level of performance, and Azadi and Hasht Behesht COMPLEXES have the best performance in this aspect; the placement of access and communications in Kasra and Rezvan COMPLEXES has been appropriate and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability. Among the investigated sociability components, the spatial order component with the path coefficient value of 0.368 has the highest path coefficient. In the first place the playability component with a path coefficient of 0.253 is in the second place, and the multipurpose component with a path coefficient of 0.231. In the third place, the security component, with a path coefficient of 0.162, is in the fourth place, and the environmental comfort component is in the fifth place, with a path coefficient of 0.153.     Conclusion Living in the common spaces of residential COMPLEXES allows one to be with others comfortably and effortlessly. A person can take a usual walk to be among people, sit on a bench near the door for a short time, and even sometimes look out of the window can be a worthwhile activity. In this research, an attempt was made to examine the condition of the studied residential COMPLEXES from the perspective of sociability. The results showed that Rahan residential complex had the lowest level of connectivity index compared to the rest of the COMPLEXES and the largest share of this. The comparison reaches Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the COMPLEXES based on the interconnection index, we conclude that the location of spaces and accesses in Rahan complex is very weak. Compared to the rest of the COMPLEXES, the location of access and communication in Kasra complex is lower. And Rezvan has been suitable and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability. Extended Abstract Introduction In the public space of neighborhoods and residential environments, the issue of sociability has been less addressed. Public spaces can boost the social life of citizens by strengthening social interactions and being involved in social sustainability. The residential environment conveys the residents a sense of well-being and satisfaction through physical, social or symbolic features. In each residential complex, according to the different arrangements of the blocks in it, it is possible to reach different influential indicators of the public space in it, which, according to the way they are arranged, have different potentials from the point of view of sociability in them. Declining sociability causes many problems in relationships between people and reduces the sense of belonging to a place, security, and other issues caused by not paying attention to the quality of collective life in housing. The main question is: - What are the components of the spatial structure affecting the sociability of residential COMPLEXES in the city of Kermanshah?   Methodology The current research is descriptive-analytical. In terms of purpose, it is in the category of applied research. Two library and field methods have collected the information needed for this research. In the field method, primary data collection has been done according to the research questions by designing a 5-scale Likert scale questionnaire. The statistical population of the study consisted of citizens living in Kasra, Azadi, Rezvan, Rahan, Hasht Behesht and Zeytoun residential COMPLEXES, which consisted of 6588 people, and the sample size was estimated to be 364 people using the Cochran formula. Factors such as the ease of access to the COMPLEXES, the willingness and cooperation of the residents and the management of the COMPLEXES were also influential in selecting the samples studied in this research. In this research, in order to investigate the sociability of residential COMPLEXES based on the theoretical framework prepared in the present research, the physical indicators affecting this issue include five indicators of "connectivity, interconnectedness, control, selection and depth" in each of The studied samples have been evaluated and analyzed in public spaces including the playground, gathering space, parking lot, and lobby. This research used Depthmap analytical software and structural equation modeling software to analyze the data.   Results and discussion In this research, the relation of sociability of public spaces of residential COMPLEXES in Kermanshah, which includes Kasra residential complex, Azadi residential complex, Rezvan residential complex, Rahan residential complex, Hasht Behesht residential complex and Zeytoun residential complex as the basis of the research case. Among the samples studied, Rahan residential complex has the lowest connectivity index compared to other COMPLEXES; the largest share of this comparison goes to Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the COMPLEXES based on the interconnection index, we conclude that the location of the spaces and accesses in the Rahan complex is very weak and lower than the rest of the COMPLEXES. According to the numbers extracted, Zeytoun complex and following that Kasra and Rezvan COMPLEXES are at the same level of performance, and Azadi and Hasht Behesht COMPLEXES have the best performance in this aspect; the placement of access and communications in Kasra and Rezvan COMPLEXES has been appropriate and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability. Among the investigated sociability components, the spatial order component with the path coefficient value of 0.368 has the highest path coefficient. In the first place the playability component with a path coefficient of 0.253 is in the second place, and the multipurpose component with a path coefficient of 0.231. In the third place, the security component, with a path coefficient of 0.162, is in the fourth place, and the environmental comfort component is in the fifth place, with a path coefficient of 0.153.     Conclusion Living in the common spaces of residential COMPLEXES allows one to be with others comfortably and effortlessly. A person can take a usual walk to be among people, sit on a bench near the door for a short time, and even sometimes look out of the window can be a worthwhile activity. In this research, an attempt was made to examine the condition of the studied residential COMPLEXES from the perspective of sociability. The results showed that Rahan residential complex had the lowest level of connectivity index compared to the rest of the COMPLEXES and the largest share of this. The comparison reaches Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the COMPLEXES based on the interconnection index, we conclude that the location of spaces and accesses in Rahan complex is very weak. Compared to the rest of the COMPLEXES, the location of access and communication in Kasra complex is lower. And Rezvan has been suitable and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability.

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Journal: 

Health Scope

Issue Info: 
  • Year: 

    2022
  • Volume: 

    11
  • Issue: 

    1
  • Pages: 

    0-0
Measures: 
  • Citations: 

    2
  • Views: 

    188
  • Downloads: 

    18
Abstract: 

Background: MANGANESE (Mn) is an essential element for the human body, but it can cause adverse effects on the Central Nervous System at high doses. Exposure to MANGANESE fumes during welding can harm welders' health. Objectives: The current study aimed to measure MANGANESE produced by shielded metal arc welding (SMAW) in the breathing zone air and blood of welders and investigate the relationship between MANGANESE concentrations in air and blood. Methods: In this descriptive-analytical cross-sectional study, 35 welders were enrolled as the exposed group and 40 office workers as the control group. MANGANESE concentration in air was measured according to NIOSH method 7301. Air and blood sample analyses were carried out by ICP-OES. Statistical analysis was performed with MINITAB 17. Data were analyzed using Pearson correlation coefficient, one-sample t-test, paired t-test, and logistic regression. The significance level was set at P < 0. 05. Result: The mean concentration of welding respirable particles and MANGANESE fumes were 9. 56-1. 67 and 0. 45-0. 08 mg/m, three and 22 times the exposure limit recommended by ACGIH, respectively. Average MANGANESE was significantly higher in the welders' blood (0. 16-0. 02 , g/mL) than in the controls' blood (0. 04-0. 002 , g/mL). There were strong and significant correlations between the welding respirable particles and MANGANESE concentration in welders' breathing zone and blood MANGANESE levels. Also, with each year of work experience, the MANGANESE concentration in the welders' blood increased by 1. 5%. Conclusions: Welders are at risk of contamination with MANGANESE. MANGANESE exposure reduction through more efficient ventilation systems, reducing welder's exposure time, staff training, and appropriate respiratory protection equipment should be applied to reduce MANGANESE exposure among welders and prevent health complications.

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Issue Info: 
  • Year: 

    2015
  • Volume: 

    17
Measures: 
  • Views: 

    137
  • Downloads: 

    50
Keywords: 
Abstract: 

THE CAPABILITY OF METAL IONS TO PROMOTE THE TEMPLATE SYNTHESIS OF MACROCYCLIC LIGANDS HAS BEEN STUDIED EXTENSIVELY AND DEPENDS ON SEVERAL FACTORS RELATED TO THE LIGAND CHARACTERISTICS, AS WELL AS ON THE NATURE OF THE METAL ION...

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Writer: 

MOHEBBI S. | ESLAMI S.

Issue Info: 
  • Year: 

    2013
  • Volume: 

    16
Measures: 
  • Views: 

    132
  • Downloads: 

    67
Keywords: 
Abstract: 

THIOL OXIDATION, ALSO REDUCTION OF PERIODATE, HAVE INDUSTRIAL AND BIOLOGICAL IMPORTANCE THAT OCCURS AT HIGH OVERPOTENTIALS ON CONVENTIONAL ELECTRODES. HENCE ELECTROCATALYSTS HAVE TO BE FOUND THAT REDUCE THE OVERPOTENTIALS, LOWER CURRENT DENSITIES AND ACCELERATE ELECTRON TRANSFER. RECENTELY, FABRICATION OF CHEMICALLY MODIFIED ELECTRODE (CME) USING CARBON NANOTUBES (CNTS) AS ELECTRON TRANSFER ACCELERATOR IS WIDELY REPORTED TO IMPROVE SENSITIVITY IN DETERMINATION OF DIFFERENT COMPOUNDS SUCH AS ASCORBIC ACID [1], BILIRUBIN [2], PARACETAMOL [3], NADH [4] AND OXYGEN [5]. SCHIFF BASES AND THEIR METAL COMPLEXES ARE CONSIDERED TO BE AMONG THE MOST IMPORTANT STEREOCHEMICAL MODELS IN METAL COORDINATION CHEMISTRY DUE TO THEIR PREPARATIVE ACCESSIBILITY AND STRUCTURAL VARIETY [6]. HERE WE REPORT SERIES OF 5 NEW MANGANESE (II) SCHIFF BASE COMPLEXES THAT SYNTHESIZED AND CHARACTERIZED BY FT-IR, UV-VIS AND MASS SPECTROSCOPY. CENTRAL METAL MN IS KNOWN TO SHOW ELECTROCATALYTIC ACTIVITY TOWARDS REDOX REACTIONS. ELECTRO CATALYTIC REACTIONS WERE RUN IN AQUEOUS MEDIA IN POTENTIAL RANGE -200 - 700MV USING 3 ELECTRODE CYCLIC VOTAMMOGRAM SYSTEM. GLASSY CARBON ELECTRODE MODIFIED BY DIRECT DEPOSITION OF MWCNTS AND MN COMPLEXES. IN THE OXIDATION OF 2-ME, COMPLEX MN [(4-OME-5-BR, SAL) (5-NO2-SAL) PHEN] HAVE SHOWN THE HIGHEST CATALYTIC ACTIVITY (ICAT=15.8 MA, DEP=60 MV) DUE TO NO2 ELECTRON WITHDRAWING SUBSTITUENT. REASONABLY, REDUCTION OF PERIODATE, CATALYZED BY THE PRESENCE OF ELECTRON DONOR OR ABSENCE OF ELECTRON WITHDRAWING SUBSTITUENTS ON THE LIGAND, AS MN [(5- BR-4-OME-SAL) (SAL) PH] WITH OME ELECTRON DONOR GROUP IN PARA POSITION DEMONSTRATED THE HIGHEST CATALYTIC CURRENT (ICAT=34.98 MA).PRESENT STUDY OFFERS A NEW RANGE OF MANGANESE (II) SUBSTITUTED SALOPH COMPLEXES AIMED AT ACTING AS ELECTROCATALYTSTS FOR THE HIGHLY DEMANDED OXIDATION OF THIOLS THAT IN COMPARISON WITH OTHER STUDY, HAVE BEEN DONE USING COBALT PHTHALOCYANINE COMPLEXES [7], ATTAINED ADVANTAGES SUCH AS PERFORMING IN NEUTRAL AQUEOUS SOLUTION AND MOVING OXIDATION POTENTIAL TO MORE POSITIVE POTENTIALS RESULTS EASIER AND FASTER OXIDATION.

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