1
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Rayaprol S, Iyer KK, Hoser A, Reehuis M, Morozkin AV, Siruguri V, Maiti K, Sampathkumaran EV. Magnetic-field induced melting of long-range magnetic order akin to Kitaev insulators in the metallic compound Tb 5Si 3. J Phys Condens Matter 2023; 35. [PMID: 37075772 DOI: 10.1088/1361-648x/acce8a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 04/19/2023] [Indexed: 05/03/2023]
Abstract
There have been constant efforts to find 'exotic' quantum spin-liquid (QSL) materials. Some of the transition metal insulators dominated by the direction-dependent anisotropic exchange interaction ('Kitaev model' for honeycomb network of magnetic ions) are considered to be promising cases for the same. In such Kitaev insulators, QSL is achieved from the zero-field antiferromagnetic state by the application of magnetic-field, suppressing other exchange interactions responsible for magnetic order. Here, we show that the features attributable to long-range magnetic ordering of the intermetallic compound, Tb5Si3, (TN= 69 K), containing honey-comb network of Tb ions, are completely suppressed by a critical applied field,Hcr, in heat-capacity and magnetization data, mimicking the behavior of Kitaev physics candidates. The neutron diffraction patterns as a function ofHreveal that it is an incommensurate magnetic structure that gets suppressed, showing peaks arising from multiple wave vectors beyondHcr. Increasing magnetic entropy as a function ofHwith a peak in the magnetically ordered state is in support of some kind of magnetic disorder in a narrow field range afterHcr. Such a high-field behavior for a metallic heavy rare-earth system to our knowledge has not been reported in the past and therefore is intriguing.
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Affiliation(s)
- S Rayaprol
- UGC-DAE Consortium for Scientific Research, Mumbai Centre, BARC Campus, Trombay, Mumbai 400085, India
| | - K K Iyer
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - A Hoser
- Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin D-14109, Germany
| | - M Reehuis
- Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin D-14109, Germany
| | - A V Morozkin
- Department of Chemistry, Moscow State University, 119992 Moscow, Russia
| | - V Siruguri
- UGC-DAE Consortium for Scientific Research, Mumbai Centre, BARC Campus, Trombay, Mumbai 400085, India
| | - K Maiti
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - E V Sampathkumaran
- UGC-DAE Consortium for Scientific Research, Mumbai Centre, BARC Campus, Trombay, Mumbai 400085, India
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
- Homi Bhabha Centre for Science Education, Tata Institute of Fundamental Research, V. N. Purav Marg, Mankhurd, Mumbai 400088, India
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2
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Samanta SK, Maiti K, Halder S, Guria UN, Mandal D, Jana K, Mahapatra AK. A 'double locked' ratiometric fluorescent probe for detection of cysteine in a viscous system and its application in cancer cells. Org Biomol Chem 2023; 21:575-584. [PMID: 36541660 DOI: 10.1039/d2ob01813f] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Intracellular viscosity is a physicochemical property that regulates the consequences of several biological progressions. Cysteine (Cys) is an important signaling molecule that commands many cellular activities, such as antioxidant generation. Predicting that both may be interconnected with a diversity of pathological processes, their contemporaneous measurement would be valuable for studying the pathological ailment of cells. Herein, we have synthesized a 'double locked' probe, acrylic acid 6-[4-(2-benzothiazol-2-yl-2-cyano-vinyl)-phenyl]-naphthalen-2-yl ester (ABN) for the detection of Cys in a viscous medium and explored its application to living cells that were exposed to dexamethasone to regulate the intracellular viscosity level. ABN displayed a satisfactory ratiometric (blue to orange) fluorescence response in solution and in living cells when Cys and viscosity coexisted. A turn-on fluorescence signal was visualized when the probe was individually treated with Cys and glycerol (a standard viscosity source). Therefore, we propose that ABN is a fluorescent probe that permits the monitoring of variations in intracellular viscosity and Cys levels in a biological environment, and it can be utilized in innumerable cellular damage models.
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Affiliation(s)
- Sandip Kumar Samanta
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India.
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India.
| | - Satyajit Halder
- Division of Molecular Medicine, Bose Institute, P 1/12, CIT Scheme VIIM, Kolkata 700054, India
| | - Uday Narayan Guria
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India.
| | - Debasish Mandal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India
| | - Kuladip Jana
- Division of Molecular Medicine, Bose Institute, P 1/12, CIT Scheme VIIM, Kolkata 700054, India
| | - Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India.
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3
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Bowes KM, White JR, Maiti K, Meselhe E. Surface water temperature impacts on coastal wetland denitrification: Implications for river reconnection. Sci Total Environ 2022; 828:154397. [PMID: 35271927 DOI: 10.1016/j.scitotenv.2022.154397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/28/2022] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Louisiana, located in the southeast United States, is home to 40% of the continental US's coastal wetlands yet accounts for 80% of the nation's coastal wetland loss. This loss is generally attributed to decreased sediment supply, hydrologic alteration from levees, channelization, subsidence, sea-level rise, and wave and tidal induced marsh edge erosion. The Mid-Barataria Sediment Diversion is a US $1.3 billion coastal restoration project that will divert up to 2100 m3 s-1 of sediment-laden Mississippi River water directly into Barataria Basin. The influx of colder, nutrient-rich, springtime river water could negatively impact water quality of the receiving basin. We quantified the effects of colder, surface water temperature on the nitrate (NO3-) reduction rate in vegetated marsh and open water bay sediments. Colder water limited NO3- removal processes averaging 17.1 mg N m-2 d-1 in the range of 5-14 °C, before increasing almost 3-fold in the 20 °C treatments at 50.6 mg N m-2 d-1. Low N removal rates, especially near the project inflow where temperatures will be coldest will favor transport of NO3- further into Barataria Basin where eutrophic conditions could become expressed. These results will inform coastal managers around the world of the potential ecosystem response to coastal restoration aimed at river reconnection where colder waters enter warmer, shallow basins.
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Affiliation(s)
- K M Bowes
- Oceanography & Coastal Sciences Department, Louisiana State University, Baton Rouge, LA, United States of America
| | - J R White
- Oceanography & Coastal Sciences Department, Louisiana State University, Baton Rouge, LA, United States of America.
| | - K Maiti
- Oceanography & Coastal Sciences Department, Louisiana State University, Baton Rouge, LA, United States of America
| | - E Meselhe
- School of Science and Engineering, Tulane University, New Orleans, LA, United States of America
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4
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Guria UN, Manna SK, Maiti K, Samanta SK, Ghosh A, Datta P, Mandal D, Mahapatra AK. A xanthene-based novel colorimetric and fluorometric chemosensor for the detection of hydrazine and its application in the bio-imaging of live cells. NEW J CHEM 2021. [DOI: 10.1039/d1nj02943f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An efficient xanthene-based colorimetric and fluorometric probe (MXI) for the selective detection of hydrazine in solution and in living cells.
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Affiliation(s)
- Uday Narayan Guria
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, West Bengal, India
| | - Saikat Kumar Manna
- Department of Chemistry, Haldia Government College, Debhog, Purba Medinipur, West Bengal-721657, India
| | - Kalipada Maiti
- Department of Chemistry, University of Calcutta, University College of Science, 92, A. P. C. Road, Kolkata 700009, India
| | - Sandip Kumar Samanta
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, West Bengal, India
| | - Aritri Ghosh
- Centre for Healthcare Science, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
| | - Pallab Datta
- Centre for Healthcare Science, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
| | - Debasish Mandal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India
| | - Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, West Bengal, India
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5
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Guria UN, Maiti K, Ali SS, Gangopadhyay A, Samanta SK, Roy K, Mandal D, Mahapatra AK. An Organic Nanofibrous Polymeric Composite for Ratiometric Detection of Diethyl Chlorophosphate (DCP) in Solution and Vapor. ChemistrySelect 2020. [DOI: 10.1002/slct.202000179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Uday Narayan Guria
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
| | - Kalipada Maiti
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
| | - Syed Samim Ali
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
| | - Ankita Gangopadhyay
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
| | - Sandip Kumar Samanta
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
| | - Krittish Roy
- Department of Physics Jadavpur UniversityJadavpur University Campus Area, Jadavpur, 188, Raja S.C. Mallick Rd Kolkata West Bengal 700032 India
| | - Dipankar Mandal
- Department of Physics Jadavpur UniversityJadavpur University Campus Area, Jadavpur, 188, Raja S.C. Mallick Rd Kolkata West Bengal 700032 India
- Institute of Nano Science & Technology (INST) Habitat Centre, Phase 10, Sector 64, Mohali Punjab 160062 India
| | - Ajit K. Mahapatra
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
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6
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Manna SK, Gangopadhyay A, Maiti K, Mondal S, Mahapatra AK. Recent Developments in Fluorometric and Colorimetric Chemodosimeters Targeted towards Hydrazine Sensing: Present Success and Future Possibilities. ChemistrySelect 2019. [DOI: 10.1002/slct.201803685] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Saikat Kumar Manna
- Department of ChemistryHaldia Government College, Debhog, Purba Medinipur - 721657 West Bengal India
| | - Ankita Gangopadhyay
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur, Howrah- 711103, West Bengal India
| | - Kalipada Maiti
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur, Howrah- 711103, West Bengal India
| | - Sanchita Mondal
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur, Howrah- 711103, West Bengal India
| | - Ajit Kumar Mahapatra
- Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur, Howrah- 711103, West Bengal India
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7
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Adhikari PL, Maiti K, Bam W. Fate of particle-bound polycyclic aromatic hydrocarbons in the river-influenced continental margin of the northern Gulf of Mexico. Mar Pollut Bull 2019; 141:350-362. [PMID: 30955743 DOI: 10.1016/j.marpolbul.2019.02.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 02/03/2019] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
This study utilizes suspended particles and seafloor sediments collected from the northern Gulf of Mexico (GOM) continental margin to study the fate, transport, residence times and accumulation rates of particle-bound polycyclic aromatic hydrocarbons (PAHs). Total particulate-PAHs and particulate organic carbon (POC) varied between 0.9 and 7.0 ng/L, and 4-131 μg/L, respectively. Particulate-PAHs were positively correlated with POC, while both particulate-PAHs and POC were negatively correlated with salinity (P-value < 0.05). These results show that the river-derived particle influx and associated POC are important vectors for transport and fate of particulate-PAHs in the river-dominated northern GOM continental ecosystems. The composition of underlying seafloor sediment-PAHs were not correlated to the water column particulate-PAHs, which is attributed to re-mineralization, sediment resuspension/redistribution and different timescales of comparison. The 210Pb-derived residence time of particles and associated particulate-PAHs in water column varied between 2 and 39 days. Residence times of particulate-PAHs were significantly correlated with seafloor sediment-PAHs accumulation rates, shorter water column residence times leading to higher PAHs accumulation rates.
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Affiliation(s)
- P L Adhikari
- Department of Marine and Ecological Sciences, Florida Gulf Coast University, Fort Myers, FL 33965, United States of America.
| | - K Maiti
- College of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, United States of America
| | - W Bam
- College of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, United States of America
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8
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Samanta SK, Ali SS, Gangopadhyay A, Maiti K, Pramanik AK, Guria UN, Ghosh A, Datta P, Mahapatra AK. A highly selective ratiometric fluorescent probe for H 2S based on new heterocyclic ring formation and detection in live cells. Supramol Chem 2019. [DOI: 10.1080/10610278.2019.1590573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sandip Kumar Samanta
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Syed Samim Ali
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Ankita Gangopadhyay
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Ajoy Kumar Pramanik
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Uday Narayan Guria
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Aritri Ghosh
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Pallab Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
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9
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Karmakar P, Manna S, Maiti K, Ali SS, Guria UN, Sarkar R, Datta P, Mandal D, Mahapatra AK. A Perylene diimide based fluorescent probe for caffeine in aqueous medium. Supramol Chem 2018. [DOI: 10.1080/10610278.2018.1530352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Parthasarathi Karmakar
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Srimanta Manna
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Syed Samim Ali
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Uday Narayan Guria
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
| | - Ripon Sarkar
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Pallab Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Debasish Mandal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, India
| | - Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur,Howrah, India
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10
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Guria UN, Maiti K, Ali SS, Samanta SK, Mandal D, Sarkar R, Datta P, Ghosh AK, Mahapatra AK. Reaction-based bi-signaling chemodosimeter probe for selective detection of hydrogen sulfide and cellular studies. NEW J CHEM 2018. [DOI: 10.1039/c7nj04632d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A new quinoline-indolium-based chemical probe (DPQI) was synthesized and characterized for selective detection of hydrogen sulphide (H2S).
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Affiliation(s)
- Uday Narayan Guria
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sandip Kumar Samanta
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Debasish Mandal
- School of Chemistry and Biochemistry
- Thapar Institute of Engineering and Technology
- Patiala
- India
| | - Ripon Sarkar
- Centre for Healthcare Science and Technology
- Indian Institute of Engineering Science and Technology
- Shibpur
- India
| | - Pallab Datta
- Centre for Healthcare Science and Technology
- Indian Institute of Engineering Science and Technology
- Shibpur
- India
| | | | - Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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11
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Manna S, Karmakar P, Maiti K, Ali SS, Mandal D, Mahapatra AK. A reactive primary fluorescence switch-on sensor for Hg 2+ and the generated fluorophore as secondary recognition receptor toward Cu 2+ in aqueous acetonitrile solution. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.04.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Maiti K, Mahapatra AK, Gangopadhyay A, Maji R, Mondal S, Ali SS, Das S, Sarkar R, Datta P, Mandal D. Simple Bisthiocarbonohydrazone as a Sensitive, Selective, Colorimetric, and Ratiometric Fluorescent Chemosensor for Picric Acids. ACS Omega 2017; 2:1583-1593. [PMID: 31457524 PMCID: PMC6641181 DOI: 10.1021/acsomega.6b00288] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 01/24/2017] [Indexed: 05/26/2023]
Abstract
A bisthiocarbonohydrazone-based chemosensor molecule (R1) containing a tetrahydro-8-hydroxyquinolizine-9-carboxaldehyde moiety has been synthesized and characterized as a new ratiometric fluorescent probe for picric acid (PA). The ratiometric probe R1 is a highly selective and sensitive colorimetric chemosensor for PA. The association between the chemosensor and PA and the ratiometric performance enabled by the key role of excited state intramolecular proton transfer in the detection process are demonstrated. Selectivity experiments proved that R1 has excellent selectivity to PA over other nitroaromatic chemicals. Importantly, the ratiometric probe exhibited a noteworthy change in both colorimetric and emission color, and this key feature enables R1 to be employed for detection of PA by simple visual inspection in silica-gel-coated thin-layer chromatography plates. Probe R1 has been shown to detect PA up to 3.2 nM at pH 7.4. Microstructural features of R1 and its PA complex have been measured by a field emission scanning electron microscope, and it clearly proves that their morphological features differ dramatically both in shape and size. Density function theory and time-dependent density function theory calculations were performed to establish the sensing mechanism and the electronic properties of probe R1. Furthermore, we have demonstrated the utility of probe R1 for the detection of PA in live Vero cells for ratiometric fluorescence imaging.
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Affiliation(s)
- Kalipada Maiti
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Ajit Kumar Mahapatra
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Ankita Gangopadhyay
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Rajkishor Maji
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Sanchita Mondal
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Syed Samim Ali
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Sujoy Das
- Department
of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Ripon Sarkar
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Pallab Datta
- Department
of Chemistry, Indian Institute of Engineering
Science and Technology, Shibpur, Howrah 711103, India
| | - Debasish Mandal
- Institute
of Chemistry, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
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13
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Sahoo P, Das S, Sarkar HS, Maiti K, Uddin MR, Mandal S. Selective fluorescence sensing and quantification of uric acid by naphthyridine-based receptor in biological sample. Bioorg Chem 2017; 71:315-324. [DOI: 10.1016/j.bioorg.2017.03.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 02/28/2017] [Accepted: 03/02/2017] [Indexed: 11/25/2022]
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14
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Mondal S, Manna SK, Maiti K, Maji R, Ali SS, Manna S, Mandal S, Uddin MR, Mahapatra AK. Phenanthroline-fluorescein molecular hybrid as a ratiometric and selective fluorescent chemosensor for Cu2+ via FRET strategy: synthesis, computational studies and in vitro applications. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1301452] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Sanchita Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Saikat Kumar Manna
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Rajkishor Maji
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Syed Samim Ali
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Srimanta Manna
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Sukhendu Mandal
- Department of Microbiology, University of Calcutta, Kolkata, India
| | - Md Raihan Uddin
- Department of Microbiology, University of Calcutta, Kolkata, India
| | - Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
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15
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Ali SS, Gangopadhyay A, Maiti K, Mondal S, Pramanik AK, Guria UN, Uddin MR, Mandal S, Mandal D, Mahapatra AK. A chromogenic and ratiometric fluorogenic probe for rapid detection of a nerve agent simulant DCP based on a hybrid hydroxynaphthalene–hemicyanine dye. Org Biomol Chem 2017; 15:5959-5967. [DOI: 10.1039/c7ob01252g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A new cyanine dye (CYD) has been synthesized for DCP sensing.
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Affiliation(s)
- Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Ankita Gangopadhyay
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Ajoy Kumar Pramanik
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Uday Narayan Guria
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Md. Raihan Uddin
- Department of Microbiology
- University of Calcutta
- Kolkata- 700019
- India
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata- 700019
- India
| | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Israel
| | - Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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16
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Mondal S, Samim Ali S, Manna S, Maiti K, Uddin MR, Mandal S, Mandal D, Mahapatra AK. A benzopyrylium–phenothiazine conjugate of a flavylium derivative as a fluorescent chemosensor for cyanide in aqueous media and its bioimaging. NEW J CHEM 2017. [DOI: 10.1039/c7nj02716h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new benzopyrylium–phenothizine conjugate (BP) has been synthesized for CN−sensing.
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Affiliation(s)
- Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Srimanta Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | | | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata
- India
| | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Israel
| | - Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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17
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Maiti K, Mahapatra AK, Maji R, Mondal S, Ali SS, Gangopadhyay A, Manna SK, Mandal S. A Fluorophore-Free Chemodosimeter for H2S with Luminescence Turn-on Response: Hyrdogen Sulphide Sensing in Garlic Extract. ChemistrySelect 2016. [DOI: 10.1002/slct.201600756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Kalipada Maiti
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Ajit Kumar Mahapatra
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Rajkishor Maji
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Sanchita Mondal
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Syed Samim Ali
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Ankita Gangopadhyay
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Saikat Kumar Manna
- Department of Chemistry; Indian Institute of Engineering Science& Technology, Shibpur; Howrah- 711103
| | - Sukhendu Mandal
- Department of Microbiology; Ballygunge Science College; Kolkata- 700019
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18
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Mahapatra AK, Maji R, Maiti K, Mondal S, Ali SS, Manna SK, Sahoo P. Carbazole-driven ratiometric fluorescence turn on for dual ion recognition of Zn2+ and Hg2+ by thiophene-pyridyl conjugate in HEPES buffer medium: spectroscopy, computational, microscopy and cellular studies. Supramol Chem 2016. [DOI: 10.1080/10610278.2016.1202412] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Rajkishor Maji
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Sanchita Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Syed Samim Ali
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Saikat Kumar Manna
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Prithidipa Sahoo
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, India
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19
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Mahapatra AK, Manna S, Karmakar P, Maiti K, Maji R, Mandal D, Uddin R, Mandal S. Installation of efficient quenching groups of a fluorescent probe for the specific detection of cysteine and homocysteine over glutathione in solution and imaging of living cells. Supramol Chem 2016. [DOI: 10.1080/10610278.2016.1170127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Srimanta Manna
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Parthasarathi Karmakar
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Rajkishor Maji
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - Debasish Mandal
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Raihan Uddin
- Department of Microbiology, University of Calcutta, Kolkata, India
| | - Sukhendu Mandal
- Department of Microbiology, University of Calcutta, Kolkata, India
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20
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Mahapatra AK, Mondal S, Manna SK, Maiti K, Maji R, Ali SS, Mandal S, Uddin MR, Maiti DK. Highly Selective Ratiometric Fluorescent Probes for Detection of Perborate Based on Excited-State Intramolecular Proton Transfer (ESIPT) in Environmental Samples and Living Cells. ChemistrySelect 2016. [DOI: 10.1002/slct.201500032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur; Howrah- 711103
| | - Sanchita Mondal
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur; Howrah- 711103
| | - Saikat Kumar Manna
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur; Howrah- 711103
| | - Kalipada Maiti
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur; Howrah- 711103
| | - Rajkishor Maji
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur; Howrah- 711103
| | - Syed Samim Ali
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur; Howrah- 711103
| | - Sukhendu Mandal
- Department of Microbiology; University of Calcutta; Kolkata- 700019 India
| | - Md. Raihan Uddin
- Department of Microbiology; University of Calcutta; Kolkata- 700019 India
| | - Dilip Kumar Maiti
- Department of Chemistry; University of Calcutta; Kolkata- 700009 India
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21
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Mahapatra AK, Mondal S, Manna SK, Maiti K, Maji R, Ali SS, Mandal D, Uddin MR, Mandal S. Reaction-based sensing of fluoride ions using desilylation method for triggering excited-state intramolecular proton transfer. Supramol Chem 2016. [DOI: 10.1080/10610278.2015.1122195] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Sanchita Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Saikat Kumar Manna
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Kalipada Maiti
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Rajkishor Maji
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Syed Samim Ali
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Debasish Mandal
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Md. Raihan Uddin
- Department of Microbiology, University of Calcutta, Kolkata, India
| | - Sukhendu Mandal
- Department of Microbiology, University of Calcutta, Kolkata, India
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22
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Sahoo P, Sarkar HS, Das S, Maiti K, Uddin MR, Mandal S. Pyrene appended thymine derivative for selective turn-on fluorescence sensing of uric acid in live cells. RSC Adv 2016. [DOI: 10.1039/c6ra15980j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new ‘turn-ON’ fluorescent probe, pyrene appended thymine acetamide (PTA), with high sensitivity and selectivity for the detection of uric acid (UA) was developed and first time imaging of uric acid in living cells in water was achieved.
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Affiliation(s)
| | | | - Sujoy Das
- Department of Chemistry
- Visva-Bharati
- Santiniketan-731235
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Md Raihan Uddin
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
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23
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Mahapatra AK, Ali SS, Maiti K, Mondal S, Maji R, Manna S, Manna SK, Uddin MR, Mandal S. Highly sensitive ratiometric fluorescence probes for nitric oxide based on dihydropyridine and potentially useful in bioimaging. RSC Adv 2016. [DOI: 10.1039/c6ra23139j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Hantzsch dihydropyridine-based ratiometric fluorescent NO probes, viz.PyNO and TPANO, were synthesized and characterized.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Srimanta Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Md. Raihan Uddin
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
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24
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Maji R, Mahapatra AK, Maiti K, Mondal S, Ali SS, Sahoo P, Mandal S, Uddin MR, Goswami S, Quah CK, Fun HK. A highly sensitive fluorescent probe for detection of hydrazine in gas and solution phases based on the Gabriel mechanism and its bioimaging. RSC Adv 2016. [DOI: 10.1039/c6ra14212e] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new probe 2-benzo[1,2,5]thiadiazol-4-yl-isoindole-1,3-dione (BTI) based on the Gabriel reaction was developed for hydrazine which shows promising selectivity towards hydrazine over other analytes.
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25
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De Sousa SMC, Maiti K, Smith R, McCormack AI. Corticotrophin-releasing hormone (CRH) expression in the dermoid component of ovarian teratomas. J Eur Acad Dermatol Venereol 2015; 30:867-9. [PMID: 25693906 DOI: 10.1111/jdv.13035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- S M C De Sousa
- Department of Endocrinology, St Vincent's Hospital, 390 Victoria St, Sydney, NSW, Australia.,Hormones and Cancer Group, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW, Australia
| | - K Maiti
- Mothers and Babies Research Centre, Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - R Smith
- Mothers and Babies Research Centre, Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - A I McCormack
- Department of Endocrinology, St Vincent's Hospital, 390 Victoria St, Sydney, NSW, Australia.,Hormones and Cancer Group, Garvan Institute of Medical Research, 384 Victoria St, Sydney, NSW, Australia
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26
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Mahapatra AK, Mondal S, Manna SK, Maiti K, Maji R, Uddin MR, Mandal S, Sarkar D, Mondal TK, Maiti DK. A new selective chromogenic and turn-on fluorogenic probe for copper(ii) in solution and vero cells: recognition of sulphide by [CuL]. Dalton Trans 2015; 44:6490-501. [DOI: 10.1039/c4dt03969f] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A new coumarin-appended thioimidazole-linked imine conjugate,viz.Lhas been synthesized and characterized for a selectiveturn-onfluorescence chemosensor for Cu2+.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah – 711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah – 711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah – 711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah – 711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah – 711103
- India
| | - Md. Raihan Uddin
- Department of Microbiology
- Ballygunge Science College
- Kolkata-700019
- India
| | - Sukhendu Mandal
- Department of Microbiology
- Ballygunge Science College
- Kolkata-700019
- India
| | - Deblina Sarkar
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
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27
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Mahapatra AK, Maiti K, Manna SK, Maji R, Mondal S, Das Mukhopadhyay C, Sahoo P, Mandal D. A cyclization-induced emission enhancement (CIEE)-based ratiometric fluorogenic and chromogenic probe for the facile detection of a nerve agent simulant DCP. Chem Commun (Camb) 2015; 51:9729-32. [DOI: 10.1039/c5cc02991k] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first ratiometric fluorescent probe for the detection of a nerve agent simulant was developed based on tandem phosphorylation and intramolecular cyclization.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Chitrangada Das Mukhopadhyay
- Department of Centre for Healthcare Science and Technology
- Indian Institute of Engineering Science & Technology
- Howrah-711103
- India
| | - Prithidipa Sahoo
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- 91904 Jerusalem
- Israel
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28
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Mahapatra AK, Ali SS, Maiti K, Manna SK, Maji R, Mondal S, Uddin MR, Mandal S, Sahoo P. Aminomethylpyrene-based imino-phenols as primary fluorescence switch-on sensors for Al3+ in solution and in Vero cells and their complexes as secondary recognition ensembles toward pyrophosphate. RSC Adv 2015. [DOI: 10.1039/c5ra16641a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three aminomethylpyrene-based salicyl-imines, viz.L1, L2 and L3 were designed and synthesized for Al3+ ion sensing.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Md. Raihan Uddin
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Prithidipa Sahoo
- Department of Chemistry
- Visva-Bharati (A Central University)
- India
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29
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Mahapatra AK, Manna SK, Pramanik B, Maiti K, Mondal S, Ali SS, Mandal D. Colorimetric and ratiometric fluorescent chemodosimeter for selective sensing of fluoride and cyanide ions: tuning selectivity in proton transfer and C–Si bond cleavage. RSC Adv 2015. [DOI: 10.1039/c4ra12910e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
An anthraimidazolyldione based colorimetric and ratiometric fluorescent chemodosimeter (LHSi) was designed and synthesized for fluoride and cyanide ion sensing.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Bhaskar Pramanik
- Department of Chemical Sciences
- Indian Institute of Science Education & Research
- Kolkata
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Israel
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30
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Mahapatra AK, Maji R, Maiti K, Manna SK, Mondal S, Ali SS, Manna S, Sahoo P, Mandal S, Uddin MR, Mandal D. A BODIPY/pyrene-based chemodosimetric fluorescent chemosensor for selective sensing of hydrazine in the gas and aqueous solution state and its imaging in living cells. RSC Adv 2015. [DOI: 10.1039/c5ra10198k] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A BODIPY-based pyrenebutyrate-linked (BPB) chromogenic and fluorogenic probe was synthesized and characterized for the specific detection of hydrazine.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Srimanta Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Prithidipa Sahoo
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Md Raihan Uddin
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- 91904 Jerusalem
- Israel
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31
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Mahapatra AK, Karmakar P, Roy J, Manna S, Maiti K, Sahoo P, Mandal D. Colorimetric and ratiometric fluorescent chemosensor for fluoride ions based on phenanthroimidazole (PI): spectroscopic, NMR and density functional studies. RSC Adv 2015. [DOI: 10.1039/c5ra05327g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Phenanthro-imidazole conjugate of biscarbanohyrazone, probe PI was designed, synthesized and characterized for selective detection of fluoride ion.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Parthasarathi Karmakar
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Jagannath Roy
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Srimanta Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | | | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- 91904 Jerusalem
- Israel
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32
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Mahapatra AK, Maiti K, Maji R, Manna SK, Mondal S, Ali SS, Manna S. Ratiometric fluorescent and chromogenic chemodosimeter for cyanide detection in water and its application in bioimaging. RSC Adv 2015. [DOI: 10.1039/c4ra17199c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An indole conjugated thiophene–pyridyl moiety, ITP, has been synthesized and characterized for the selective detection of cyanide with a low detection limit.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Srimanta Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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33
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Mahapatra AK, Manna SK, Maiti K, Mondal S, Maji R, Mandal D, Mandal S, Uddin MR, Goswami S, Quah CK, Fun HK. An azodye–rhodamine-based fluorescent and colorimetric probe specific for the detection of Pd2+ in aqueous ethanolic solution: synthesis, XRD characterization, computational studies and imaging in live cells. Analyst 2015; 140:1229-36. [DOI: 10.1039/c4an01575d] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An azodye–rhodamine hybrid colorimetric fluorescent probe (L) has been designed and synthesized.
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34
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Mahapatra AK, Maiti K, Manna SK, Maji R, Mukhopadhyay CD, Pakhira B, Sarkar S. Unique Fluorogenic Ratiometric Fluorescent Chemodosimeter for Rapid Sensing of CN−in Water. Chem Asian J 2014; 9:3623-32. [DOI: 10.1002/asia.201402923] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 09/12/2014] [Indexed: 11/12/2022]
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35
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Parida SK, Medicherla VRR, Bag P, Rawat R, Shripathi T, Sahadev N, Biswas D, Adhikary G, Maiti K. Virtual Bound State Formation in CuNi Alloys. ACTA ACUST UNITED AC 2014. [DOI: 10.1166/asl.2014.5405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Chai SY, Smith R, Fitter JT, Mitchell C, Pan X, Ilicic M, Maiti K, Zakar T, Madsen G. Increased progesterone receptor A expression in labouring human myometrium is associated with decreased promoter occupancy by the histone demethylase JARID1A. Mol Hum Reprod 2014; 20:442-53. [PMID: 24442343 DOI: 10.1093/molehr/gau005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Progesterone regulates female reproductive function predominantly through two nuclear progesterone receptors (PRs), PR-A and PR-B. During human parturition myometrial PR expression is altered to favour PR-A, which activates pro-labour genes. We have previously identified histone H3 lysine 4 trimethylation (H3K4me3) as an activator of myometrial PR-A expression at labour. To further elucidate the mechanisms regulating PR isoform expression in the human uterus at labour, we have (i) determined the methylation profile of the cytosine-guanine dinucleotides (CpG) island in the promoter region of the PR gene and (ii) identified the histone-modifying enzymes that target the H3K4me3 mark at the PR promoters in term and preterm human myometrial tissues obtained before and after labour onset. Bisulphite sequencing showed that despite overall low levels of PR CpG island methylation, there was a significant decrease in methylated CpGs with labour in both preterm (P < 0.05) and term (P < 0.01) groups downstream of the PR-B transcription start site. This methylation change was not associated with altered PR-B expression, but may contribute to the increase in PR-A expression with labour. Chromatin immunoprecipitation revealed that the histone methyltransferase, SET and MYND domain-containing protein 3 (SMYD3), bound to the PR gene at significantly higher levels at the PR-A promoter compared with the PR-B promoter (P < 0.010), with no labour-associated changes observed. The H3K4 demethylase, Jumonji AT-rich interactive domain 1A (JARID1A), also bound to the PR-A, but not to the PR-B promoter prior to term labour, and decreased significantly at the onset of labour (P = 0.014), providing a mechanism for the previously reported increase in H3K4me3 level and PR-A expression with labour. Our studies suggest that epigenetic changes mediated by JARID1A, SMYD3 and DNA methylation may be responsible, at least in part, for the functional progesterone withdrawal that precipitates human labour.
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Affiliation(s)
- S Y Chai
- Mothers and Babies Research Centre, Hunter Medical Research Institute, University of Newcastle, Newcastle, Australia
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37
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Mahapatra AK, Manna SK, Maiti K, Maji R, Mukhopadhyay CD, Sarkar D, Mondal TK. Imino–phenolic–azodye appended rhodamine as a primary fluorescence “off–on” chemosensor for tin (Sn4+) in solution and in RAW cells and the recognition of sulphide by [AR–Sn]. RSC Adv 2014. [DOI: 10.1039/c4ra05729e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new azo-rhodamine based, AR was developed for fluorescent ‘turn-on’ sensing of Sn4+ ion.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Chitrangada Das Mukhopadhyay
- Centre for Healthcare Science & Technology
- Indian Institute of Engineering Science and Technology
- Howrah – 711103, India
| | - Deblina Sarkar
- Department of Chemistry
- Jadavpur University
- Kolkata-700032, India
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38
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Mahapatra AK, Mondal S, Maiti K, Manna SK, Maji R, Mandal D, Mandal S, Goswami S, Quah CK, Fun HK. A pyrene thiazole conjugate as a ratiometric chemosensor with high selectivity and sensitivity for tin (Sn4+) and its application in imaging live cells. RSC Adv 2014. [DOI: 10.1039/c4ra10540k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new pyrene thiazole-conjugate amine based fluoroionophore, PTC was developed for ratiometric detection of Sn4+ ion in organo-aqueous medium.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Debasish Mandal
- Institute of Chemistry
- The Hebrew University of Jerusalem
- 91904 Jerusalem, Israel
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata-700019, India
| | - Shyamaprosad Goswami
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103, India
| | - Ching Kheng Quah
- X-ray Crystallography Unit
- School of Physics
- Universiti Sains Malaysia
- Penang, Malaysia
| | - Hoong-Kun Fun
- X-ray Crystallography Unit
- School of Physics
- Universiti Sains Malaysia
- Penang, Malaysia
- Department of Pharmaceutical Chemistry College of Pharmacy
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39
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Mahapatra AK, Maji R, Maiti K, Adhikari SS, Das Mukhopadhyay C, Mandal D. Ratiometric sensing of fluoride and acetate anions based on a BODIPY-azaindole platform and its application to living cell imaging. Analyst 2013; 139:309-17. [PMID: 24255921 DOI: 10.1039/c3an01663c] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A new BODIPY-azaindole based fluorescent sensor 1 was designed and synthesized as a new colorimetric and ratiometric fluorescent chemosensor for fluoride. The binding and sensing abilities of sensor 1 towards various anions were studied by absorption, emission and (1)H NMR titration spectroscopies. The spectral responses of 1 to fluoride in acetonitrile-water were studied: an approximately 69 nm red shift in absorption and ratiometric fluorescent response was observed. The striking light yellow to deep brown color change in ambient light and green to blue emission color change are thought to be due to the deprotonation of the indole moiety of the azaindole fluorophore. From the changes in the absorption, fluorescence, and (1)H NMR titration spectra, proton-transfer mechanisms were deduced. Density function theory and time-dependent density function theory calculations were conducted to rationalize the optical response of the sensor. Results were supported by confocal fluorescence imaging and MTT assay of live cells.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711103, India.
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40
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Tolosa J, Schjenken J, Clifton V, Vargas A, Barbeau B, Lowry P, Maiti K, Smith R. The endogenous retroviral envelope protein syncytin-1 inhibits LPS/PHA-stimulated cytokine responses in human blood and is sorted into placental exosomes. Placenta 2012; 33:933-41. [DOI: 10.1016/j.placenta.2012.08.004] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 08/09/2012] [Accepted: 08/27/2012] [Indexed: 12/25/2022]
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41
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Maiti K, Paul JW, Read M, Chan EC, Riley SC, Nahar P, Smith R. G-1-activated membrane estrogen receptors mediate increased contractility of the human myometrium. Endocrinology 2011; 152:2448-55. [PMID: 21427217 DOI: 10.1210/en.2010-0979] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Estrogens are key mediators of increased uterine contractility at labor. We sought to determine whether membrane-associated estrogen receptors, such as the recently described seven-transmembrane receptor G protein-coupled receptor 30 (GPR30), mediated some of this effect. Using human myometrium obtained at term cesarean section before or after the onset of labor, we demonstrated the presence of GPR30 mRNA and protein using quantitative RT-PCR and Western blotting. GPR30 receptor was localized to the cell membrane and often colocalized with calveolin-1. Using the specific estrogen membrane receptor agonist G-1 and myometrial explants, we showed that membrane receptor activation led to phosphorylation of MAPK and the actin-modifying small heat shock protein 27. Using myometrial strips incubated with G-1 or vehicle we demonstrated that estrogen membrane receptor activation increased the myometrial contractile response to oxytocin. These data suggest that activation of the plasma membrane estrogen receptor GPR30 likely participates in the physiology of the human myometrium during pregnancy and identifies it as a potential target to modify uterine activity.
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Affiliation(s)
- K Maiti
- Mothers & Babies Research Centre/Endocrine Unit, Faculty of Health/School of Medicine & Public Health, The University of Newcastle & John Hunter Hospital, New Soth Wales, Australia.
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42
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Chen YX, Allars M, Maiti K, Angeli GL, Abou-Seif C, Smith R, Nicholson RC. Factors affecting cytotrophoblast cell viability and differentiation: Evidence of a link between syncytialisation and apoptosis. Int J Biochem Cell Biol 2011; 43:821-8. [PMID: 21352948 DOI: 10.1016/j.biocel.2011.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 02/16/2011] [Accepted: 02/16/2011] [Indexed: 02/05/2023]
Abstract
A relationship between cytotrophoblast differentiation (syncytialisation) and apoptosis is hypothesised to exist, but has not been clearly determined. To address this, we explored the effects of cAMP, an inducer of syncytialisation, on human choriocarcinoma cell differentiation and viability under three different culture conditions related to diverse survival status: no serum, 10% fetal calf serum or 10% charcoal-stripped fetal calf serum. 8-Br-cAMP increased BeWo cell viability in culture media without serum, but viability was decreased in a dose- and time-dependent manner when serum was present. The appearance of apoptotic nuclei fragments were only observed when BeWo cells were cultured in media containing serum combined with 8-Br-cAMP treatment. In addition, the ratio of FasL to Fas expression following treatment with 8-Br-cAMP increased by 20-fold in 10% charcoal-stripped fetal calf serum media and 65-fold 10% fetal calf serum media, and activation of caspase-3 also required media with serum. The markers of syncytialisation (syncytin 1 expression and human chorionic gonadotropin secretion) were induced significantly by 8-Br-cAMP, and were higher in 10% fetal calf serum media than in 10% charcoal-stripped fetal calf serum media, than in the absence of serum. Syncytia formation was stimulated by 8-Br-cAMP and this required serum in the media. We now show that factors contained within serum are necessary for cAMP-stimulated cytotrophoblast differentiation, that syncytialisation involves apoptotic events, and that a lack of serum based factors could switch the cellular program away from differentiation.
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Affiliation(s)
- Y X Chen
- Department of Pathophysiology, Second Military Medical University, Shanghai 200433, China
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43
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Eid AH, Maiti K, Mitra S, Chotani MA, Flavahan S, Bailey SR, Thompson-Torgerson CS, Flavahan NA. Estrogen increases smooth muscle expression of α2C-adrenoceptors and cold-induced constriction of cutaneous arteries. Am J Physiol Heart Circ Physiol 2007; 293:H1955-61. [PMID: 17644575 DOI: 10.1152/ajpheart.00306.2007] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Raynaud's phenomenon, which is characterized by intense cold-induced constriction of cutaneous arteries, is more common in women compared with men. Cold-induced constriction is mediated in part by enhanced activity of α2C-adrenoceptors (α2C-ARs) located on vascular smooth muscle cells (VSMs). Experiments were therefore performed to determine whether 17β-estradiol regulates α2C-AR expression and function in cutaneous VSMs. 17β-Estradiol (0.01–10 nmol/l) increased expression of the α2C-AR protein and the activity of the α2C-AR gene promoter in human cultured dermal VSMs, which was assessed following transient transfection of the cells with a promoter-reporter construct. The effect of 17β-estradiol was associated with increased accumulation of cAMP and activation of the cAMP-responsive Rap2 GTP-binding protein. Transient transfection of VSMs with a dominant-negative mutant of Rap2 inhibited the 17β-estradiol-induced activation of the α2C-AR gene promoter, whereas a constitutively active mutant of Rap2 increased α2C-AR promoter activity. The effects of 17β-estradiol were inhibited by the estrogen receptor (ER) antagonist, ICI-182780 (1 μmol/l), and were mimicked by a cell-impermeable form of the hormone (estrogen:BSA) or by the selective ER-α receptor agonist 4,4′,4‴-(4-propyl-[1H]-pyrazole-1,3,5-triyl)tris-phenol (PPT; 10 nmol/l) or the selective ER-β receptor agonist 2,3-bis(4-hydroxyphenyl)-propionitrile (DPN; 10 nmol/l). Therefore, 17β-estradiol increased expression of α2C-ARs by interacting with cell surface receptors to cause a cAMP/Rap2-dependent increase in α2C-AR transcription. In mouse tail arteries, 17β-estradiol (10 nmol/l) increased α2C-AR expression and selectively increased the cold-induced amplification of α2-AR constriction, which is mediated by α2C-ARs. An estrogen-dependent increase in expression of cold-sensitive α2C-ARs may contribute to the increased activity of cold-induced vasoconstriction under estrogen-replete conditions.
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Affiliation(s)
- A H Eid
- Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
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44
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Gambardella P, Dallmeyer A, Maiti K, Malagoli MC, Rusponi S, Ohresser P, Eberhardt W, Carbone C, Kern K. Oscillatory magnetic anisotropy in one-dimensional atomic wires. Phys Rev Lett 2004; 93:077203. [PMID: 15324270 DOI: 10.1103/physrevlett.93.077203] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2004] [Indexed: 05/24/2023]
Abstract
One-dimensional Co atomic wires grown on Pt(997) have been investigated by x-ray magnetic circular dichroism. Strong changes of the magnetic properties are observed as the system evolves from 1D- to 2D-like. The easy axis of magnetization, the magnetic anisotropy energy, and the coercive field oscillate as a function of the transverse width of the wires, in agreement with theoretical predictions for 1D metal systems.
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Affiliation(s)
- P Gambardella
- Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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45
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Maiti K, Malagoli MC, Dallmeyer A, Carbone C. Finite temperature magnetism in Gd: evidence against a Stoner behavior. Phys Rev Lett 2002; 88:167205. [PMID: 11955260 DOI: 10.1103/physrevlett.88.167205] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2001] [Indexed: 05/23/2023]
Abstract
The temperature dependence of the rare-earth valence bands has been regarded as a realization of the Stoner behavior. The exchange splitting of the electronic states appears to scale as the magnetic order parameter for T<T(C) and to vanish at T = T(C). We report here a spin-resolved photoemission study on the evolution of Gd bulk bands for 0.5< or =T/T(C)< or=1. The spin-polarized spectral line shapes display a complex temperature dependence, which clearly contrasts with the interpretation of previous experimental results. The spin-resolved photoemission data demonstrate the inadequacy of the Stoner model to the description of magnetism in rare earths.
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Affiliation(s)
- K Maiti
- Institut für Festkörperforschung, Forschungszentrum Jülich, D-52428 Jülich, Germany
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46
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Gambardella P, Dallmeyer A, Maiti K, Malagoli MC, Eberhardt W, Kern K, Carbone C. Ferromagnetism in one-dimensional monatomic metal chains. Nature 2002; 416:301-4. [PMID: 11907571 DOI: 10.1038/416301a] [Citation(s) in RCA: 744] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Two-dimensional systems, such as ultrathin epitaxial films and superlattices, display magnetic properties distinct from bulk materials. A challenging aim of current research in magnetism is to explore structures of still lower dimensionality. As the dimensionality of a physical system is reduced, magnetic ordering tends to decrease as fluctuations become relatively more important. Spin lattice models predict that an infinite one-dimensional linear chain with short-range magnetic interactions spontaneously breaks up into segments with different orientation of the magnetization, thereby prohibiting long-range ferromagnetic order at a finite temperature. These models, however, do not take into account kinetic barriers to reaching equilibrium or interactions with the substrates that support the one-dimensional nanostructures. Here we demonstrate the existence of both short- and long-range ferromagnetic order for one-dimensional monatomic chains of Co constructed on a Pt substrate. We find evidence that the monatomic chains consist of thermally fluctuating segments of ferromagnetically coupled atoms which, below a threshold temperature, evolve into a ferromagnetic long-range-ordered state owing to the presence of anisotropy barriers. The Co chains are characterized by large localized orbital moments and correspondingly large magnetic anisotropy energies compared to two-dimensional films and bulk Co.
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Affiliation(s)
- P Gambardella
- Institut de Physique des Nanostructures, EPF-Lausanne, CH-1015 Lausanne, Switzerland.
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47
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Biswas S, Murugesan T, Maiti K, Ghosh L, Pal M, Saha BP. Study on the diuretic activity of Strychnos potatorum Linn. seed extract in albino rats. Phytomedicine 2001; 8:469-471. [PMID: 11824523 DOI: 10.1078/s0944-7113(04)70067-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Methanol extract of Strychnos potatorum Linn. seeds (SPSE) was evaluated for its diuretic activity in Wistar albino rats. The SPSE was administered at the graded doses of 200, 400, and 600 mg/kg body weight. The parameters which were taken into account during the experimental on each rat were: total urine volume (corrected for water intake during the test period), body weight before and after the experiment, and the concentration of sodium, potassium, and chloride ions in urine. The total urine volumes of the SPSE (600 mg/kg)-treated rats were evaluated nearly two and half fold then compared with the control (saline treated) group. Excretion of cations (sodium and potassium ions) and anions (chloride ions) also increased significantly with respect to the control group. The diuretic effect was comparable with that of the standard drug Furosemide. The increase of cations in the urine on treatment with Strychnospotatorum seed extract (SPSE) was dose-dependent. This effect supports the use of the Strychnos potatorum seeds as a diuretic in folk remedies.
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Affiliation(s)
- S Biswas
- Department of Pharmaceutical Technology, Jadavpur University, Calcutta, India
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48
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Chattopadhyay D, Maiti K, Kundu AP, Chakraborty MS, Bhadra R, Mandal SC, Mandal AB. Antimicrobial activity of Alstonia macrophylla: a folklore of bay islands. J Ethnopharmacol 2001; 77:49-55. [PMID: 11483378 DOI: 10.1016/s0378-8741(01)00264-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The methanolic crude and methanol-aqueous extract of Alstonia macrophylla leaves and n-butanol part of the crude extract showed antimicrobial activity against various strains of Staphylococcus aureus, Staphylococcus saprophyticus, Streptococcus faecalis, Escherichia coli, Proteus mirabilis, Trichophyton rubrum, Trichophyton mentagrophytes var. mentagrophytes and Microsporum gypseum. The minimum inhibitory concentration (MIC) values ranges from 64 to 1000 microg/ml for bacteria and 32-128 mg/ml for dermatophytes. However, the strains of Pseudomonas aeruginosa, Klebsiella sp. and Vibrio cholerae showed resistance against in vitro treatment of the extracts up to 2000 microg/ml concentration, while the two yeast species were resistant even at 128 mg/ml concentration. The stem bark extract prepared similarly was found to be less active compared to the leaves. Phytochemical study indicates that the crude extract contains tannins, flavonoids, saponins, sterols, triterpene and reducing sugars. Further fractionation and purification of n-butanol part of the extract showed the presence of beta-sitosterol, ursolic acid, beta-sitosterol glucoside and a mixture of minor compounds only detected in TLC.
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Affiliation(s)
- D Chattopadhyay
- ICMR Virus Unit, Calcutta Infectious Diseases and Beliaghata General Hospital Campus, GB 4 1st Floor, Beliaghata Main Road, Calcutta 700010, India.
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49
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Abstract
The methanol extract of Bergenia ciliata (tested at 200--1000 microg/disc) showed a wide spectrum of concentration-dependent antibacterial activity.
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Affiliation(s)
- S Sinha
- Department of Pharmaceutical Technology, Jadavpur University, Calcutta 700 032, India.
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50
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Maiti K, Malagoli MC, Magnano E, Dallmeyer A, Carbone C. Electronic band structure of Gd: a consistent description. Phys Rev Lett 2001; 86:2846-2849. [PMID: 11290054 DOI: 10.1103/physrevlett.86.2846] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2000] [Indexed: 05/23/2023]
Abstract
The dispersion of the Gd (5d6s)-valence bands has been investigated by means of spin- and angle-resolved photoemission. The spin analysis of various spectral features shows that their weak dispersion and unusual broadening is due to the photoelectron lifetime rather than to correlation induced band narrowing as previously proposed. These results resolve a long-standing discrepancy between theoretical and experimental descriptions of the rare earth band structure.
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Affiliation(s)
- K Maiti
- Institut für Festkorperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany
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