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  1. Article ; Online: Neodymium-Doped Novel Barium Tungstate Nanospindles for the Enhanced Oxygen Evolution Reaction.

    Swathi, Srinivasan / Priyanga, Marimuthu / Rathinam, Yuvakkumar / Ganesan, Ravi / Al-Sehemi, Abdullah G / Velauthapillai, Dhayalan

    ACS omega

    2023  Volume 8, Issue 4, Page(s) 3745–3754

    Abstract: In this work, pristine, 0.02, 0.04, and 0.06 M neodymium (Nd)-doped barium tungstate nanostructures were synthesized via a simple co-precipitation method for the water oxidation process. The obtained X-ray diffraction high-intensity peak at a 2θ value of ...

    Abstract In this work, pristine, 0.02, 0.04, and 0.06 M neodymium (Nd)-doped barium tungstate nanostructures were synthesized via a simple co-precipitation method for the water oxidation process. The obtained X-ray diffraction high-intensity peak at a 2θ value of 26.4° corresponding to the (112) lattice plane confirmed the formation of a tetragonal structure of BaWO
    Language English
    Publishing date 2023-01-17
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.2c05156
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Phytochemical screening studies on Melia orientalis by GC-MS analysis.

    Marimuthu, Srinivasan / Padmaja, Balakrishnan / Nair, Sudarsan

    Pharmacognosy research

    2013  Volume 5, Issue 3, Page(s) 216–218

    Abstract: Background: Melia orientalis (MO) is an important Ayurvedic medicinal plants. The plant part such as leaves and roots are traditionally used for the treatment of diabetes, edema, traumatic swelling, skin diseases, oligospermia and bleeding disorders.: ...

    Abstract Background: Melia orientalis (MO) is an important Ayurvedic medicinal plants. The plant part such as leaves and roots are traditionally used for the treatment of diabetes, edema, traumatic swelling, skin diseases, oligospermia and bleeding disorders.
    Objective: To investigate the phytochemical identification of ethanol leaf extract of MO.
    Materials and methods: The fresh leaves of MO (1000g) were collected and shade dried at room temperature for 30 days and the dried leaves were made into a fine powder. The ethanol leaf extract obtained was dried and used for phytochemical identification by GC-MS analysis.
    Results: The phytochemical screening studies have been carried out and identified ten chemical constituents present in the leaf extract of MO.
    Conclusion: Thus, our results show that MO possess important phytocomponents such as phytol, squalene and stigmasterol.
    Language English
    Publishing date 2013-07-30
    Publishing country India
    Document type Journal Article
    ZDB-ID 2580264-1
    ISSN 0974-8490 ; 0976-4836
    ISSN (online) 0974-8490
    ISSN 0976-4836
    DOI 10.4103/0974-8490.112433
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Phytochemical investigation and radical scavenging activities of Melia azedarach and its DNA protective effect in cultured lymphocytes.

    Marimuthu, Srinivasan / Balakrishnan, Padmaja / Nair, Sudarsan

    Pharmaceutical biology

    2013  Volume 51, Issue 10, Page(s) 1331–1340

    Abstract: Context: Melia azedarach Linn (Meliaceae) is an Ayurvedic medicinal plant which is native to India. It is traditionally used for the treatment of leprosy, inflammation, scrofula, anthelmintic, antilithic, diuretic, deobstruent and cardiac disorders.: ... ...

    Abstract Context: Melia azedarach Linn (Meliaceae) is an Ayurvedic medicinal plant which is native to India. It is traditionally used for the treatment of leprosy, inflammation, scrofula, anthelmintic, antilithic, diuretic, deobstruent and cardiac disorders.
    Objective: To evaluate the phytochemical constituents and antioxidant activities of the ethanol leaf extract of Melia azedarach (MA) and its protective effect against H2O2-induced cellular damage in cultured lymphocytes.
    Materials and methods: The dose-dependent study of MA (20, 40, 60, 80, 100 µg/ml) was used to study in vitro radical scavenging assays. The effective dose of MA (60 µg/ml) was further used to study the H2O2-induced DNA damage (comet assay and DNA fragmentation assay) in cultured lymphocytes.
    Results: The ethanol extract of MA (20, 40, 60, 80, 100 µg/ml) exhibited a significant dose-dependent inhibition of in vitro radical scavenging assays and their corresponding IC50 values as follows: hydroxyl radical (26.50 ± 0.26 µg/ml), superoxide anion (30.00 ± 0.32 µg/ml), nitric oxide radical (48.00 ± 0.48 µg/ml), DPPH radical (30.55 ± 0.32 µg/ml) and reducing power (22.00 ± 0.22 µg/ml). The increase in the severity of DNA damage and TBARS was increased significantly (p<0.05) at 500 µM H2O2-treated cultured lymphocytes and RBC cellular membranes. The phytochemical screening studies identified 13 chemical constituents present in the leaf extract of MA.
    Discussion and conclusion: The results of this study demonstrate that MA offers protection against H2O2-induced cellular damage and it can be developed as an effective antioxidant during oxidative stress.
    MeSH term(s) Adult ; Cells, Cultured ; Comet Assay ; Cytoprotection ; DNA Damage/drug effects ; DNA Fragmentation/drug effects ; Dose-Response Relationship, Drug ; Free Radical Scavengers/chemistry ; Free Radical Scavengers/isolation & purification ; Free Radical Scavengers/pharmacology ; Humans ; Hydrogen Peroxide/toxicity ; Lipid Peroxidation/drug effects ; Lymphocytes/drug effects ; Lymphocytes/metabolism ; Lymphocytes/pathology ; Melia azedarach/chemistry ; Oxidative Stress/drug effects ; Phytotherapy ; Plant Extracts/chemistry ; Plant Extracts/isolation & purification ; Plant Extracts/pharmacology ; Plant Leaves ; Plants, Medicinal ; Reactive Oxygen Species/metabolism ; Young Adult
    Chemical Substances Free Radical Scavengers ; Plant Extracts ; Reactive Oxygen Species ; Hydrogen Peroxide (BBX060AN9V)
    Language English
    Publishing date 2013-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1440131-9
    ISSN 1744-5116 ; 1388-0209
    ISSN (online) 1744-5116
    ISSN 1388-0209
    DOI 10.3109/13880209.2013.791323
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Aspirin inhibits glucose‑6‑phosphate dehydrogenase activity in HCT 116 cells through acetylation: Identification of aspirin-acetylated sites.

    Ai, Guoqiang / Dachineni, Rakesh / Kumar, D Ramesh / Alfonso, Lloyd F / Marimuthu, Srinivasan / Bhat, G Jayarama

    Molecular medicine reports

    2016  Volume 14, Issue 2, Page(s) 1726–1732

    Abstract: Glucose-6-phosphate dehydrogenase (G6PD) catalyzes the first reaction in the pentose phosphate pathway, and generates ribose sugars, which are required for nucleic acid synthesis, and nicotinamide adenine dinucleotide phosphate (NADPH), which is ... ...

    Abstract Glucose-6-phosphate dehydrogenase (G6PD) catalyzes the first reaction in the pentose phosphate pathway, and generates ribose sugars, which are required for nucleic acid synthesis, and nicotinamide adenine dinucleotide phosphate (NADPH), which is important for neutralization of oxidative stress. The expression of G6PD is elevated in several types of tumor, including colon, breast and lung cancer, and has been implicated in cancer cell growth. Our previous study demonstrated that exposure of HCT 116 human colorectal cancer cells to aspirin caused acetylation of G6PD, and this was associated with a decrease in its enzyme activity. In the present study, this observation was expanded to HT‑29 colorectal cancer cells, in order to compare aspirin‑mediated acetylation of G6PD and its activity between HCT 116 and HT‑29 cells. In addition, the present study aimed to determine the acetylation targets of aspirin on recombinant G6PD to provide an insight into the mechanisms of inhibition. The results demonstrated that the extent of G6PD acetylation was significantly higher in HCT 116 cells compared with in HT‑29 cells; accordingly, a greater reduction in G6PD enzyme activity was observed in the HCT 116 cells. Mass spectrometry analysis of aspirin‑acetylated G6PD (isoform a) revealed that aspirin acetylated a total of 14 lysine residues, which were dispersed throughout the length of the G6PD protein. One of the important amino acid targets of aspirin included lysine 235 (K235, in isoform a) and this corresponds to K205 in isoform b, which has previously been identified as being important for catalysis. Acetylation of G6PD at several sites, including K235 (K205 in isoform b), may mediate inhibition of G6PD activity, which may contribute to the ability of aspirin to exert anticancer effects through decreased synthesis of ribose sugars and NADPH.
    MeSH term(s) Acetylation/drug effects ; Amino Acids ; Aspirin/chemistry ; Aspirin/pharmacology ; Binding Sites ; Enzyme Activation/drug effects ; Enzyme Inhibitors/chemistry ; Enzyme Inhibitors/pharmacology ; Glucosephosphate Dehydrogenase/antagonists & inhibitors ; Glucosephosphate Dehydrogenase/chemistry ; Glucosephosphate Dehydrogenase/metabolism ; HCT116 Cells ; HT29 Cells ; Humans ; Models, Molecular ; Molecular Conformation ; Pentose Phosphate Pathway/drug effects ; Protein Binding
    Chemical Substances Amino Acids ; Enzyme Inhibitors ; Glucosephosphate Dehydrogenase (EC 1.1.1.49) ; Aspirin (R16CO5Y76E)
    Language English
    Publishing date 2016-08
    Publishing country Greece
    Document type Journal Article
    ISSN 1791-3004
    ISSN (online) 1791-3004
    DOI 10.3892/mmr.2016.5449
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Phytochemical screening studies on Melia orientalis by GC-MS analysis

    Srinivasan Marimuthu / Balakrishnan Padmaja / Sudarsan Nair

    Pharmacognosy Research, Vol 5, Iss 3, Pp 216-

    2013  Volume 218

    Abstract: Background: Melia orientalis (MO) is an important Ayurvedic medicinal plants. The plant part such as leaves and roots are traditionally used for the treatment of diabetes, edema, traumatic swelling, skin diseases, oligospermia and bleeding disorders. ... ...

    Abstract Background: Melia orientalis (MO) is an important Ayurvedic medicinal plants. The plant part such as leaves and roots are traditionally used for the treatment of diabetes, edema, traumatic swelling, skin diseases, oligospermia and bleeding disorders. Objective: To investigate the phytochemical identification of ethanol leaf extract of MO. Materials and Methods: The fresh leaves of MO (1000g) were collected and shade dried at room temperature for 30 days and the dried leaves were made into a fine powder. The ethanol leaf extract obtained was dried and used for phytochemical identification by GC-MS analysis. Results: The phytochemical screening studies have been carried out and identified ten chemical constituents present in the leaf extract of MO. Conclusion: Thus, our results show that MO possess important phytocomponents such as phytol, squalene and stigmasterol.
    Keywords Antioxidants ; GC-MS analysis ; medicinal plants ; Melia orientalis ; phytocomponents ; Pharmacy and materia medica ; RS1-441 ; Medicine ; R
    Subject code 580
    Language English
    Publishing date 2013-01-01T00:00:00Z
    Publisher Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Protective role of ferulic acid on carbon tetrachloride-induced hyperlipidemia and histological alterations in experimental rats.

    Marimuthu, Srinivasan / Adluri, Ram Sudheer / Rajagopalan, Rukkumani / Menon, Venugopal Padmanabhan

    Journal of basic and clinical physiology and pharmacology

    2013  Volume 24, Issue 1, Page(s) 59–66

    Abstract: Background: The present study aimed to evaluate the antihyperlipidemic effect of ferulic acid (FA) on carbon tetrachloride (CCl4)-treated rats.: Methods: Female albino rats of the Wistar strain were used in the present study. The rats were divided ... ...

    Abstract Background: The present study aimed to evaluate the antihyperlipidemic effect of ferulic acid (FA) on carbon tetrachloride (CCl4)-treated rats.
    Methods: Female albino rats of the Wistar strain were used in the present study. The rats were divided into four groups: groups 1 and 4 received physiological saline (3 mL/kg body weight/week) by subcutaneous injection, whereas groups 2 and 3 received a subcutaneous injection of CCl4 (3 mL/kg body weight/week) for a total period of 12 weeks. In addition, groups 3 and 4 were administered FA (20 mL/kg body weight) every day for the last 90 days.
    Results: The results showed significantly (p≤0.05) elevated levels of cholesterol, triglycerides (TG), and free fatty acids (FFA) in the liver and kidney of CCl4-treated rats as compared with those of the controls. In addition, the levels of cholesterol, FFA, phospholipids (PL), and TG were elevated significantly in the circulation. Administration of FA effectively reduced these levels of lipids in the plasma, liver, and kidney of CCl4-treated rats. The PL level was significantly decreased in the liver and kidney of CCl4-treated rats and was positively modulated by FA treatment. Our histopathological observations were also in correlation with the biochemical parameters.
    Conclusions: From the results obtained, we could conclude that FA effectively protects the system against hyperlipidemia and may be an effective therapeutic agent for the treatment of this disorder.
    MeSH term(s) Animals ; Carbon Tetrachloride/toxicity ; Cholesterol/metabolism ; Coumaric Acids/pharmacology ; Disease Models, Animal ; Fatty Acids, Nonesterified/metabolism ; Female ; Hyperlipidemias/drug therapy ; Hypolipidemic Agents/pharmacology ; Kidney/drug effects ; Kidney/metabolism ; Liver/drug effects ; Liver/metabolism ; Rats ; Rats, Wistar ; Triglycerides/metabolism
    Chemical Substances Coumaric Acids ; Fatty Acids, Nonesterified ; Hypolipidemic Agents ; Triglycerides ; Cholesterol (97C5T2UQ7J) ; ferulic acid (AVM951ZWST) ; Carbon Tetrachloride (CL2T97X0V0)
    Language English
    Publishing date 2013
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1071737-7
    ISSN 2191-0286 ; 0792-6855 ; 0334-1534
    ISSN (online) 2191-0286
    ISSN 0792-6855 ; 0334-1534
    DOI 10.1515/jbcpp-2012-0053
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Aspirin acetylates wild type and mutant p53 in colon cancer cells: identification of aspirin acetylated sites on recombinant p53.

    Ai, Guoqiang / Dachineni, Rakesh / Kumar, D Ramesh / Marimuthu, Srinivasan / Alfonso, Lloyd F / Bhat, G Jayarama

    Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine

    2015  Volume 37, Issue 5, Page(s) 6007–6016

    Abstract: Aspirin's ability to inhibit cell proliferation and induce apoptosis in cancer cell lines is considered to be an important mechanism for its anti-cancer effects. We previously demonstrated that aspirin acetylated the tumor suppressor protein p53 at ... ...

    Abstract Aspirin's ability to inhibit cell proliferation and induce apoptosis in cancer cell lines is considered to be an important mechanism for its anti-cancer effects. We previously demonstrated that aspirin acetylated the tumor suppressor protein p53 at lysine 382 in MDA-MB-231 human breast cancer cells. Here, we extended these observations to human colon cancer cells, HCT 116 harboring wild type p53, and HT-29 containing mutant p53. We demonstrate that aspirin induced acetylation of p53 in both cell lines in a concentration-dependent manner. Aspirin-acetylated p53 was localized to the nucleus. In both cell lines, aspirin induced p21(CIP1). Aspirin also acetylated recombinant p53 (rp53) in vitro suggesting that it occurs through a non-enzymatic chemical reaction. Mass spectrometry analysis and immunoblotting identified 10 acetylated lysines on rp53, and molecular modeling showed that all lysines targeted by aspirin are surface exposed. Five of these lysines are localized to the DNA-binding domain, four to the nuclear localization signal domain, and one to the C-terminal regulatory domain. Our results suggest that aspirin's anti-cancer effect may involve acetylation and activation of wild type and mutant p53 and induction of target gene expression. This is the first report attempting to characterize p53 acetylation sites targeted by aspirin.
    MeSH term(s) Acetylation/drug effects ; Aspirin/pharmacology ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Colonic Neoplasms/genetics ; Colonic Neoplasms/metabolism ; Cyclin-Dependent Kinase Inhibitor p21/genetics ; Cyclin-Dependent Kinase Inhibitor p21/metabolism ; HCT116 Cells ; HT29 Cells ; Humans ; Lysine/metabolism ; Mutant Proteins/chemistry ; Mutant Proteins/metabolism ; Protein Processing, Post-Translational ; Protein Transport ; Recombinant Proteins ; Tumor Suppressor Protein p53/chemistry ; Tumor Suppressor Protein p53/genetics ; Tumor Suppressor Protein p53/metabolism
    Chemical Substances Cyclin-Dependent Kinase Inhibitor p21 ; Mutant Proteins ; Recombinant Proteins ; Tumor Suppressor Protein p53 ; Lysine (K3Z4F929H6) ; Aspirin (R16CO5Y76E)
    Language English
    Publishing date 2015-11-23
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 605825-5
    ISSN 1423-0380 ; 0289-5447 ; 1010-4283
    ISSN (online) 1423-0380
    ISSN 0289-5447 ; 1010-4283
    DOI 10.1007/s13277-015-4438-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Synthesis, spectral studies and solvatochromic analysis of novel imidazole derivatives.

    Jayabharathi, Jayaraman / Thanikachalam, Venugopal / Srinivasan, Natesan / Venkatesh Perumal, Marimuthu

    Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

    2012  Volume 89, Page(s) 194–200

    Abstract: Bioactive imidazole derivatives were synthesized and characterized by spectral techniques. The photophysical properties of imidazole derivatives were studied in several solvents. The observed spectral shift is attributed to a loss of planarity in the ... ...

    Abstract Bioactive imidazole derivatives were synthesized and characterized by spectral techniques. The photophysical properties of imidazole derivatives were studied in several solvents. The observed spectral shift is attributed to a loss of planarity in the excited state provided by the non-co-planarity of the aryl rings attached to C(2) and N(1) atoms of the imidazole ring. The observed solvatochromic shifts were analyzed in detail by Kamlet-Taft and Catalan parameters. The interaction between bioactive imidazole derivative and bovine serum albumin (BSA) was also investigated.
    MeSH term(s) Animals ; Cattle ; Imidazoles/chemical synthesis ; Imidazoles/chemistry ; Imidazoles/metabolism ; Models, Molecular ; Protein Binding ; Serum Albumin, Bovine/metabolism ; Solvents ; Spectrum Analysis
    Chemical Substances Imidazoles ; Solvents ; Serum Albumin, Bovine (27432CM55Q)
    Language English
    Publishing date 2012-04
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 210413-1
    ISSN 1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
    ISSN (online) 1873-3557
    ISSN 0370-8322 ; 0584-8539 ; 1386-1425
    DOI 10.1016/j.saa.2011.12.060
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Light-emitting materials from cyclometalated heteroleptic iridium(III) complexes--A physicochemical study.

    Jayabharathi, Jayaraman / Thanikachalam, Venugopal / Srinivasan, Natesan / Venkatesh Perumal, Marimuthu

    Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

    2012  Volume 87, Page(s) 119–125

    Abstract: Phosphorescent studies of 2-arylimidazole heteroleptic cyclometalated iridium(III) complexes with picolinic acid as the ancillary ligand were made. The observed experimental data reveal that these complexes possess dominantly (3)MLCT and (3)π-π* excited ... ...

    Abstract Phosphorescent studies of 2-arylimidazole heteroleptic cyclometalated iridium(III) complexes with picolinic acid as the ancillary ligand were made. The observed experimental data reveal that these complexes possess dominantly (3)MLCT and (3)π-π* excited states and the solvent shift of these complexes is interpreted by Reichardt-Dimroth and Marcus solvent functions. The results are consistent with prior assignments on the absorption band to a metal-to-ligand charge transfer excited state associated with chelating ligand. Emission kinetic studies exploited that the radiative transition (k(r)) increases with increasing λ(em).
    MeSH term(s) Coordination Complexes/chemistry ; Imidazoles/chemistry ; Iridium/chemistry ; Ligands ; Light ; Luminescent Measurements ; Models, Molecular ; Picolinic Acids/chemistry
    Chemical Substances Coordination Complexes ; Imidazoles ; Ligands ; Picolinic Acids ; Iridium (44448S9773) ; picolinic acid (QZV2W997JQ)
    Language English
    Publishing date 2012-02-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 210413-1
    ISSN 1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
    ISSN (online) 1873-3557
    ISSN 0370-8322 ; 0584-8539 ; 1386-1425
    DOI 10.1016/j.saa.2011.11.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: In vitro and in vivo efficacy of rosmarinic acid on quorum sensing mediated biofilm formation and virulence factor production in Aeromonas hydrophila.

    Rama Devi, Kannan / Srinivasan, Ramanathan / Kannappan, Arunachalam / Santhakumari, Sivasubramanian / Bhuvaneswari, Murugan / Rajasekar, Periyannan / Prabhu, Narayanan Marimuthu / Veera Ravi, Arumugam

    Biofouling

    2016  Volume 32, Issue 10, Page(s) 1171–1183

    Abstract: Rosmarinic acid (RA) was assessed for its quorum sensing inhibitory (QSI) potential against Aeromonas hydrophila strains AH 1, AH 12 and MTCC 1739. The pathogenic strains of A. hydrophila were isolated from infected zebrafish and identified through ... ...

    Abstract Rosmarinic acid (RA) was assessed for its quorum sensing inhibitory (QSI) potential against Aeromonas hydrophila strains AH 1, AH 12 and MTCC 1739. The pathogenic strains of A. hydrophila were isolated from infected zebrafish and identified through biochemical analysis and amplification of a species-specific gene (rpsL). The biofilm inhibitory concentration (BIC) of RA against A. hydrophila strains was found to be 750 μg ml
    MeSH term(s) Aeromonas hydrophila/genetics ; Aeromonas hydrophila/metabolism ; Aeromonas hydrophila/pathogenicity ; Aeromonas hydrophila/physiology ; Biofilms/drug effects ; Biofilms/growth & development ; Cinnamates/pharmacology ; Depsides/pharmacology ; Down-Regulation ; Microbial Sensitivity Tests ; Quorum Sensing/drug effects ; Spectroscopy, Fourier Transform Infrared ; Virulence ; Virulence Factors/genetics ; Virulence Factors/metabolism ; Rosmarinic Acid
    Chemical Substances Cinnamates ; Depsides ; Virulence Factors
    Language English
    Publishing date 2016-10-13
    Publishing country England
    Document type Journal Article
    ISSN 1029-2454
    ISSN (online) 1029-2454
    DOI 10.1080/08927014.2016.1237220
    Database MEDical Literature Analysis and Retrieval System OnLINE

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