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  1. Article ; Online: Primer for Designing Main Protease (M

    Thakur, Abhishek / Sharma, Gaurav / Badavath, Vishnu Nayak / Jayaprakash, Venkatesan / Merz, Kenneth M / Blum, Galia / Acevedo, Orlando

    The journal of physical chemistry letters

    2022  Volume 13, Issue 25, Page(s) 5776–5786

    Abstract: ... upon experimentally validated inhibitors of SARS-CoV-2 main protease (M ...

    Abstract The COVID-19 outbreak has been devastating, with hundreds of millions of infections and millions of deaths reported worldwide. In response, the application of structure-activity relationships (SAR) upon experimentally validated inhibitors of SARS-CoV-2 main protease (M
    MeSH term(s) Antiviral Agents/chemistry ; Antiviral Agents/pharmacology ; Cysteine Endopeptidases/metabolism ; Humans ; Molecular Docking Simulation ; Molecular Dynamics Simulation ; Peptide Hydrolases ; Protease Inhibitors/chemistry ; Protease Inhibitors/pharmacology ; SARS-CoV-2 ; Viral Nonstructural Proteins ; COVID-19 Drug Treatment
    Chemical Substances Antiviral Agents ; Protease Inhibitors ; Viral Nonstructural Proteins ; Peptide Hydrolases (EC 3.4.-) ; Cysteine Endopeptidases (EC 3.4.22.-)
    Language English
    Publishing date 2022-06-21
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.2c01193
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Pregnancy outcomes in women with heart disease: the Madras Medical College Pregnancy And Cardiac (M-PAC) Registry from India.

    Justin Paul, Gnanaraj / Anne Princy, Steaphen / Anju, Surendran / Anita, Susikar / Cecily Mary, Majella / Gnanavelu, Ganesan / Kanmani, Kandasamy / Meena, Mahalingam / Nandakumaran, Mohanan / Ramya, Swaminathan / Ravishankar, Govindarajulu / Shaanthi, Gunasingh / Shoba, Somasundaram / Sangareddi, Venkatesan / Vijaya, Subramanian

    European heart journal

    2023  Volume 44, Issue 17, Page(s) 1530–1540

    Abstract: ... college pregnancy and cardiac (M-PAC) registry. Majority (60.5%; 623/1029) had heart disease (HD ...

    Abstract Aims: To evaluate the feto-maternal outcome, identify the adverse outcome predictors and test the applicability of modified WHO (mWHO) classification in pregnant women with heart disease (PWWHD) from Tamil Nadu, India.
    Methods and results: One thousand and five pregnant women (mean age: 26.04 ± 4.2) with 1029 consecutive pregnancies were prospectively enrolled from July 2016 to December 2019 in the Madras medical college pregnancy and cardiac (M-PAC) registry. Majority (60.5%; 623/1029) had heart disease (HD) diagnosed for the first time during pregnancy. Rheumatic HD (42%; 433/1029) was most common. One third (34.2%; 352/1029) had pulmonary hypertension (PH). Maternal mortality and composite maternal cardiac events (MCEs) were the primary outcomes. Secondary outcomes were foetal loss and composite adverse foetal events (AFEs). MCEs occurred in 15.2% (156/1029; 95% CI: 13.0-17.5) pregnancies. Heart failure was the most common MCE (66.0%; 103/156; 95% CI: 58.0-73.4). Maternal mortality was 1.9% (20/1029; 95% CI: 1.1-2.8), with highest rates in patients with prosthetic heart valves (PHVs) (8.6%; 6/70). Left ventricular systolic dysfunction (LVSD), PHVs, severe mitral stenosis, PH and current pregnancy diagnosis of HD were independent predictors of MCE. The c-statistic of mWHO classification for predicting MCE and maternal death were 0.794 (95% CI: 0.763-0.826) and 0.796 (95% CI: 0.732-0.860). 91.2% (938/1029; 95% CI: 89.392.8) of pregnancies resulted in live births. 33.7% (347/1029; 95% CI: 30.8-36.7) of pregnancies reported AFEs.
    Conclusion: Maternal mortality is high in PWWHD from India. Highest death rates occurred in women with PHVs, PH and LVSD. The mWHO classification for risk stratification may require further adaptation and validation in India.
    MeSH term(s) Female ; Humans ; Pregnancy ; Young Adult ; Adult ; Pregnancy Outcome/epidemiology ; India/epidemiology ; Pregnancy Complications, Cardiovascular/epidemiology ; Mitral Valve Stenosis ; Hypertension, Pulmonary ; Registries ; Retrospective Studies
    Language English
    Publishing date 2023-07-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 603098-1
    ISSN 1522-9645 ; 0195-668X
    ISSN (online) 1522-9645
    ISSN 0195-668X
    DOI 10.1093/eurheartj/ehad003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Role of M.tuberculosis protein Rv2005c in the aminoglycosides resistance.

    Sharma, Divakar / Lata, Manju / Faheem, Mohammad / Khan, Asad Ullah / Joshi, Beenu / Venkatesan, Krishnamurthy / Shukla, Sangeeta / Bisht, Deepa

    Microbial pathogenesis

    2019  Volume 132, Page(s) 150–155

    Abstract: ... translation machinery of M.tuberculosis. Several mechanisms have been put forward to elucidate the phenomena ... cumulatively involved in M.tuberculosis resistance, stresses, and latency. ...

    Abstract Tuberculosis is an airborne infectious disease caused by Mycobacterium tuberculosis which threatens the globe. Aminoglycosides {Amikacin (AK) & Kanamycin (KM)} are WHO recommended second-line anti-TB drugs used against the treatment of drug-resistant tuberculosis. Aminoglycosides target the steps of protein translation machinery of M.tuberculosis. Several mechanisms have been put forward to elucidate the phenomena of aminoglycosides resistance but our knowledge is still insufficient. The aim of the study was to understand the involvement of Mycobacterium tuberculosis universal stress protein (Rv2005c) in aminoglycosides resistance and virulence. To establish the relationship of universal stress protein Rv2005c with AK & KM resistance, Rv2005c was cloned, expressed in E.coli BL21 using pQE2 expression vector and antimicrobial drug susceptibility testing (DST) was carried out. STRING-10 was also used to predict the interacting protein partners of Rv2005c. DST showed that the minimum inhibitory concentration of induced recombinant cells (Rv2005c) were five and four folds shifted with AK and KM E-strips, respectively. STRING-10 showed the interacting protein partners of Rv2005c. Overexpression of Rv2005c leads to shifting in MIC which might be signifying its involvement in the survival/resistance of Mycobacteria by inhibiting/modulating the effects of AK and KM released from the E-strips. Interactome also suggests that Rv2005c and its interacting protein partners are cumulatively involved in M.tuberculosis resistance, stresses, and latency.
    MeSH term(s) Amikacin/pharmacology ; Aminoglycosides/pharmacology ; Antigens, Bacterial/genetics ; Antigens, Bacterial/metabolism ; Antitubercular Agents/pharmacology ; Bacterial Proteins/genetics ; Bacterial Proteins/metabolism ; Cloning, Molecular ; DNA, Bacterial/genetics ; DNA, Bacterial/isolation & purification ; Drug Resistance, Multiple, Bacterial/genetics ; Gene Expression Regulation, Bacterial ; Kanamycin/pharmacology ; Microbial Sensitivity Tests ; Mycobacterium tuberculosis/drug effects ; Mycobacterium tuberculosis/metabolism ; Protein Interaction Maps ; Tuberculosis, Multidrug-Resistant/drug therapy
    Chemical Substances Aminoglycosides ; Antigens, Bacterial ; Antitubercular Agents ; Bacterial Proteins ; DNA, Bacterial ; HspX protein, Mycobacterium tuberculosis ; Kanamycin (59-01-8) ; Amikacin (84319SGC3C)
    Language English
    Publishing date 2019-05-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2019.05.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Association of Maternal Observation and Motivation (MOM) Program with m-Health Support on Maternal and Newborn Health.

    Paulsamy, Premalatha / Easwaran, Vigneshwaran / Ashraf, Rizwan / Alshahrani, Shadia Hamoud / Venkatesan, Krishnaraju / Qureshi, Absar Ahmed / Arrab, Mervat Moustafa / Prabahar, Kousalya / Periannan, Kalaiselvi / Vasudevan, Rajalakshimi / Kandasamy, Geetha / Chidambaram, Kumarappan / Pappiya, Ester Mary / Venkatesan, Kumar / Manoharan, Vani

    Healthcare (Basel, Switzerland)

    2021  Volume 9, Issue 12

    Abstract: ... Motivation (MOM) program and m-Health support for maternal and newborn health. A comparative study was done ...

    Abstract Maternal and child nutrition has been a critical component of health, sustainable development, and progress in low- and middle-income countries (LMIC). While a decrement in maternal mortality is an important indicator, simply surviving pregnancy and childbirth does not imply better maternal health. One of the fundamental obligations of nations under international human rights law is to enable women to endure pregnancy and delivery as an aspect of their enjoyment of reproductive and sexual health and rights and to live a dignified life. The aim of this study was to discover the correlation between the Maternal Observation and Motivation (MOM) program and m-Health support for maternal and newborn health. A comparative study was done among 196 pregnant mothers (study group-94; control group-102 mothers) with not less than 20 weeks of gestation. Maternal outcomes such as Hb and weight gain and newborn results such as birth weight and crown-heel length were obtained at baseline and at 28 and 36 weeks of gestation. Other secondary data collected were abortion, stillbirth, low birth weight, major congenital malformations, twin or triplet pregnancies, physical activity, and maternal well-being. The MOM intervention included initial face-to-face education, three in-person visits, and eight virtual health coaching sessions via WhatsApp. The baseline data on Hb of the mothers show that 31 (32.98%) vs. 27 (28.72%) mothers in the study and control group, respectively, had anemia, which improved to 27.66% and 14.98% among study group mothers at 28 and 36 weeks of gestation (
    Language English
    Publishing date 2021-11-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2721009-1
    ISSN 2227-9032
    ISSN 2227-9032
    DOI 10.3390/healthcare9121629
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book: Imaging of gynecologic malignancy

    Venkatesan, Aradhana M.

    the current state of the art

    (Radiologic clinics of North America ; volume 61, number 4 (July 2023))

    2023  

    Author's details editor Aradhana M. Venkatesan
    Series title Radiologic clinics of North America ; volume 61, number 4 (July 2023)
    Collection
    Language English
    Size xv Seiten, Seite 563-760, Illustrationen
    Publisher Elsevier
    Publishing place Philadelphia, Pennsylvania
    Publishing country United States
    Document type Book
    HBZ-ID HT030348825
    ISBN 978-0-323-94035-1 ; 0-323-94035-8
    Database Catalogue ZB MED Medicine, Health

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  6. Article: Role of M.tuberculosis protein Rv2005c in the aminoglycosides resistance

    Sharma, Divakar / Lata, Manju / Faheem, Mohammad / Khan, Asad Ullah / Joshi, Beenu / Venkatesan, Krishnamurthy / Shukla, Sangeeta / Bisht, Deepa

    Microbial pathogenesis. 2019 July, v. 132

    2019  

    Abstract: ... translation machinery of M.tuberculosis. Several mechanisms have been put forward to elucidate the phenomena ... cumulatively involved in M.tuberculosis resistance, stresses, and latency. ...

    Abstract Tuberculosis is an airborne infectious disease caused by Mycobacterium tuberculosis which threatens the globe. Aminoglycosides {Amikacin (AK) & Kanamycin (KM)} are WHO recommended second-line anti-TB drugs used against the treatment of drug-resistant tuberculosis. Aminoglycosides target the steps of protein translation machinery of M.tuberculosis. Several mechanisms have been put forward to elucidate the phenomena of aminoglycosides resistance but our knowledge is still insufficient. The aim of the study was to understand the involvement of Mycobacterium tuberculosis universal stress protein (Rv2005c) in aminoglycosides resistance and virulence. To establish the relationship of universal stress protein Rv2005c with AK & KM resistance, Rv2005c was cloned, expressed in E.coli BL21 using pQE2 expression vector and antimicrobial drug susceptibility testing (DST) was carried out. STRING-10 was also used to predict the interacting protein partners of Rv2005c. DST showed that the minimum inhibitory concentration of induced recombinant cells (Rv2005c) were five and four folds shifted with AK and KM E-strips, respectively. STRING-10 showed the interacting protein partners of Rv2005c. Overexpression of Rv2005c leads to shifting in MIC which might be signifying its involvement in the survival/resistance of Mycobacteria by inhibiting/modulating the effects of AK and KM released from the E-strips. Interactome also suggests that Rv2005c and its interacting protein partners are cumulatively involved in M.tuberculosis resistance, stresses, and latency.
    Keywords Mycobacterium tuberculosis ; amikacin ; drug resistance ; drugs ; genetic vectors ; minimum inhibitory concentration ; tuberculosis ; virulence
    Language English
    Dates of publication 2019-07
    Size p. 150-155.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2019.05.001
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Cystatin E/M Suppresses Tumor Cell Growth through Cytoplasmic Retention of NF-κB.

    Soh, Hendrick / Venkatesan, Natarajan / Veena, Mysore S / Ravichandran, Sandhiya / Zinabadi, Alborz / Basak, Saroj K / Parvatiyar, Kislay / Srivastava, Meera / Liang, Li-Jung / Gjertson, David W / Torres, Jorge Z / Moatamed, Neda A / Srivatsan, Eri S

    Molecular and cellular biology

    2016  Volume 36, Issue 12, Page(s) 1776–1792

    Abstract: We and others have shown that the cystatin E/M gene is inactivated in primary human tumors ... not yet understood. Using plasmid-directed cystatin E/M gene overexpression, a lentivirus-mediated ... of tumor necrosis factor alpha (TNF-α), confirming the role of cystatin E/M in the regulation of the NF-κB signaling pathway ...

    Abstract We and others have shown that the cystatin E/M gene is inactivated in primary human tumors, pointing to its role as a tumor suppressor gene. However, the molecular mechanism of tumor suppression is not yet understood. Using plasmid-directed cystatin E/M gene overexpression, a lentivirus-mediated tetracycline-inducible vector system, and human papillomavirus 16 (HPV 16) E6 and E7 gene-immortalized normal human epidermal keratinocytes, we demonstrated intracellular and non-cell-autonomous apoptotic growth inhibition of tumor cell lines and that growth inhibition is associated with cytoplasmic retention of NF-κB. We further demonstrated decreased phosphorylation of IκB kinase (IKKβ) and IκBα in the presence of tumor necrosis factor alpha (TNF-α), confirming the role of cystatin E/M in the regulation of the NF-κB signaling pathway. Growth suppression of nude mouse xenograft tumors carrying a tetracycline-inducible vector system was observed with the addition of doxycycline in drinking water, confirming that the cystatin E/M gene is a tumor suppressor gene. Finally, immunohistochemical analyses of cervical carcinoma in situ and primary tumors have shown a statistically significant inverse relationship between the expression of cystatin E/M and cathepsin L and a direct relationship between the loss of cystatin E/M expression and nuclear expression of NF-κB. We therefore propose that the cystatin E/M suppressor gene plays an important role in the regulation of NF-κB.
    MeSH term(s) Animals ; Cathepsin L/metabolism ; Cell Line, Tumor ; Cell Proliferation ; Cystatin M/genetics ; Cystatin M/metabolism ; Cytoplasm/metabolism ; Doxycycline/administration & dosage ; Female ; Gene Expression Regulation, Neoplastic ; Genetic Vectors/pharmacology ; HeLa Cells ; Humans ; I-kappa B Proteins/metabolism ; Lentivirus/genetics ; Mice ; Mice, Nude ; NF-kappa B/metabolism ; Neoplasm Transplantation ; Phosphorylation ; Signal Transduction ; Tumor Necrosis Factor-alpha/metabolism ; Uterine Cervical Neoplasms/genetics ; Uterine Cervical Neoplasms/metabolism ; Uterine Cervical Neoplasms/pathology
    Chemical Substances CST6 protein, human ; Cystatin M ; I-kappa B Proteins ; NF-kappa B ; TNF protein, human ; Tumor Necrosis Factor-alpha ; CTSL protein, human (EC 3.4.22.15) ; Cathepsin L (EC 3.4.22.15) ; Doxycycline (N12000U13O)
    Language English
    Publishing date 2016-05-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 779397-2
    ISSN 1098-5549 ; 0270-7306
    ISSN (online) 1098-5549
    ISSN 0270-7306
    DOI 10.1128/MCB.00878-15
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Association of Maternal Observation and Motivation (MOM) Program with m-Health Support on Maternal and Newborn Health

    Premalatha Paulsamy / Vigneshwaran Easwaran / Rizwan Ashraf / Shadia Hamoud Alshahrani / Krishnaraju Venkatesan / Absar Ahmed Qureshi / Mervat Moustafa Arrab / Kousalya Prabahar / Kalaiselvi Periannan / Rajalakshimi Vasudevan / Geetha Kandasamy / Kumarappan Chidambaram / Ester Mary Pappiya / Kumar Venkatesan / Vani Manoharan

    Healthcare, Vol 9, Iss 1629, p

    2021  Volume 1629

    Abstract: ... Motivation (MOM) program and m-Health support for maternal and newborn health. A comparative study was done ...

    Abstract Maternal and child nutrition has been a critical component of health, sustainable development, and progress in low- and middle-income countries (LMIC). While a decrement in maternal mortality is an important indicator, simply surviving pregnancy and childbirth does not imply better maternal health. One of the fundamental obligations of nations under international human rights law is to enable women to endure pregnancy and delivery as an aspect of their enjoyment of reproductive and sexual health and rights and to live a dignified life. The aim of this study was to discover the correlation between the Maternal Observation and Motivation (MOM) program and m-Health support for maternal and newborn health. A comparative study was done among 196 pregnant mothers (study group—94; control group—102 mothers) with not less than 20 weeks of gestation. Maternal outcomes such as Hb and weight gain and newborn results such as birth weight and crown–heel length were obtained at baseline and at 28 and 36 weeks of gestation. Other secondary data collected were abortion, stillbirth, low birth weight, major congenital malformations, twin or triplet pregnancies, physical activity, and maternal well-being. The MOM intervention included initial face-to-face education, three in-person visits, and eight virtual health coaching sessions via WhatsApp. The baseline data on Hb of the mothers show that 31 (32.98%) vs. 27 (28.72%) mothers in the study and control group, respectively, had anemia, which improved to 27.66% and 14.98% among study group mothers at 28 and 36 weeks of gestation ( p < 0.001). The weight gain ( p < 0.001), level of physical activity ( p < 0.001), and maternal well-being ( p < 0.01) also had significant differences after the intervention. Even after controlling for potentially confounding variables, the maternal food practices regression model revealed that birth weight was directly correlated with the consumption of milk ( p < 0.001), fruits ( p < 0.01), and green vegetables ( p < 0.05). As per ...
    Keywords pregnant mothers ; physical activity ; maternal well-being ; antenatal mothers ; newborn outcomes ; m-health ; Medicine ; R
    Subject code 796
    Language English
    Publishing date 2021-11-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: M. tuberculosis ferritin (Rv3841): Potential involvement in Amikacin (AK) & Kanamycin (KM) resistance.

    Sharma, Divakar / Lata, Manju / Faheem, Mohammad / Khan, Asad Ullah / Joshi, Beenu / Venkatesan, Krishnamurthy / Shukla, Sangeeta / Bisht, Deepa

    Biochemical and biophysical research communications

    2016  Volume 478, Issue 2, Page(s) 908–912

    Abstract: ... resistant isolates. Iron assimilation and utilization in M. tuberculosis plays a crucial role in growth ... interacted with few proteins which are directly and indirectly involved in M. tuberculosis growth, Iron ...

    Abstract Tuberculosis is an infectious disease, caused by one of the most successful human pathogen, Mycobacterium tuberculosis. Aminoglycosides, Amikacin (AK) & Kanamycin (KM) are commonly used to treat drug resistant tuberculosis. They target the protein synthesis machinery by interacting with several steps of translation. Several explanations have been proposed to explain the mechanism of aminoglycoside resistance but still our information is inadequate. Iron storing/interacting proteins were found to be overexpressed in aminoglycosides resistant isolates. Iron assimilation and utilization in M. tuberculosis plays a crucial role in growth, virulence and latency. To establish the relationship of ferritin with AK & KM resistance ferritin (Rv3841/bfrB) was cloned, expressed and antimicrobial drug susceptibility testing (DST) was carried out. Rv3841/bfrB gene was cloned and expressed in E. coli BL21 using pQE2 expression vector. Etest results for DST against AK & KM showed that the minimum inhibitory concentration (MIC) of ferritin recombinant cells was changed. Recombinants showed two fold changes in MIC with AK and three fold with KM E-strips. Overexpression of ferritin reflect the MIC shift which might be playing a critical role in the survival of mycobacteria by inhibiting/modulating the effects of AK & KM. String analysis also suggests that ferritin interacted with few proteins which are directly and indirectly involved in M. tuberculosis growth, Iron assimilation, virulence, resistance, stresses and latency.
    MeSH term(s) Amikacin/pharmacology ; Cloning, Molecular ; Drug Resistance, Microbial/drug effects ; Ferritins/genetics ; Ferritins/isolation & purification ; Ferritins/metabolism ; Genes, Bacterial ; Kanamycin/pharmacology ; Microbial Sensitivity Tests ; Mycobacterium tuberculosis/drug effects ; Mycobacterium tuberculosis/genetics ; Plasmids/isolation & purification ; Protein Interaction Mapping ; Recombinant Proteins/isolation & purification ; Restriction Mapping ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ; Transformation, Genetic/drug effects
    Chemical Substances Recombinant Proteins ; Kanamycin (59-01-8) ; Amikacin (84319SGC3C) ; Ferritins (9007-73-2)
    Language English
    Publishing date 2016--16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205723-2
    ISSN 1090-2104 ; 0006-291X ; 0006-291X
    ISSN (online) 1090-2104 ; 0006-291X
    ISSN 0006-291X
    DOI 10.1016/j.bbrc.2016.08.049
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Rhus verniciflua as a green corrosion inhibitor for mild steel in 1 M H2SO4

    Prabakaran, Mayakrishnan / Kim, Seung-Hyun / Hemapriya, Venkatesan / Gopiraman, Mayakrishnan / Kim, Ick Soo / Chung, Ill-Min

    RSC advances. 2016 June 14, v. 6, no. 62

    2016  

    Abstract: ... steel in 1 M H2SO4 through weight loss measurements, ultraviolet-visible ...

    Abstract The methanolic extract of the plant Rhus verniciflua was examined as a corrosion inhibitor for mild steel in 1 M H2SO4 through weight loss measurements, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, electrochemical impedance spectroscopy, and potentiodynamic polarization measurements. The sample surface morphology was analyzed using scanning electron microscopy/energy-dispersive X-ray spectroscopy. The total phenolic content of the R. verniciflua leaf extract was found to be 158 mg g−1, while the total flavonoid content was 19.65 mg g−1. Eleven phenolic compounds, three flavonoid compounds, five derivatives of hydroxycinnamic acid, and four hydroxybenzoic acids were identified in the extract. Polarization studies showed that the R. verniciflua plant extract acts as a good mixed-type inhibitor. The inhibition efficiency was found to increase with an increase in the inhibitor concentration. On the other hand, the inhibition efficiency decreased with an increase in the temperature. The adsorption of the plant extract constituents is discussed based on the Langmuir, Temkin, and El-Awady isotherms. Moreover, the adsorption and thermodynamic parameters corresponding to extract adsorption onto mild steel were calculated and are discussed. The results show that the R. verniciflua plant extract can be employed as an effective corrosion inhibitor with good anticorrosion properties for metals in acidic environments.
    Keywords Fourier transform infrared spectroscopy ; Toxicodendron vernicifluum ; adsorption ; corrosion ; coumaric acids ; dielectric spectroscopy ; energy-dispersive X-ray analysis ; flavonoids ; hydroxybenzoic acids ; leaf extracts ; steel ; sulfuric acid ; temperature ; thermodynamics ; ultraviolet-visible spectroscopy ; weight loss
    Language English
    Dates of publication 2016-0614
    Size p. 57144-57153.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c6ra09637a
    Database NAL-Catalogue (AGRICOLA)

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