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Kumar M, Pandey SK, Lalhall A, Sharma R, Sharma RK, Wangoo N. Targeting bacterial biofilms using vancomycin and multivalent cell-penetrating peptide labeled quantum dots. J Biomed Mater Res B Appl Biomater 2023; 111:284-294. [PMID: 36056808 DOI: 10.1002/jbm.b.35150] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/19/2022] [Accepted: 08/01/2022] [Indexed: 12/15/2022]
Abstract
Bacterial biofilms are highly resilient microbial musters that are difficult to eradicate, driving the development of novel therapeutic strategies. The current study aims to investigate the therapeutic efficacy of cell-penetrating peptide-based targeted delivery of vancomycin functionalized quantum dots in eradicating biofilm formation in gram-positive and gram-negative bacterial strains. The conjugate was characterized using fluorimetry, UV-visible spectroscopy, gel electrophoresis, and zeta potential. The conjugate was then tested for antimicrobial and antibiofilm activity against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, and it demonstrated excellent antimicrobial as well as antibiofilm activity against all the tested strains. The findings indicated that the conjugate was capable of overcoming bacterial resistance of bacteria in addition to the eradication of biofilms at effective concentrations.
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Affiliation(s)
- Munish Kumar
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, India
| | - Satish Kumar Pandey
- Department of Biotechnology, School of Life Sciences, Mizoram University, Aizawl, India
| | - Alisha Lalhall
- Centre for Nanoscience and Nanotechnology, Panjab University, Chandigarh, India.,Department of Applied Sciences, University Institute of Engineering & Technology (U.I.E.T.), Panjab University, Chandigarh, India
| | - Rohit Sharma
- Centre for Stem Cell and Tissue Engineering, Panjab University, Chandigarh, India
| | - Rohit K Sharma
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, India
| | - Nishima Wangoo
- Department of Applied Sciences, University Institute of Engineering & Technology (U.I.E.T.), Panjab University, Chandigarh, India
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2
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Chen WF, Pandey SK, Lensing JN. Does Liposuction for Lymphedema Worsen Lymphatic Injury? Lymphology 2023; 56:3-12. [PMID: 38019875] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Liposuction for treatment of lymphedema is an effective and time-tested treatment. However, as there is a fear regarding further lymphatic damage caused by liposuction, we objectively compared lymphatic function pre- and post-liposuction. All patients with solid-predominant lymphedema who were treated during the study period of June 2014 and November 2018 were included. Patients were assessed using patient-reported baselines/outcomes, lymphedema- specific quality of life scale (LYMQOL), limb circumference/volume measurements, and indocyanine green lymphography (ICGL) preoperatively and at predefined postoperative time intervals. Fifty-seven limbs from 41 patients were included. Mean lipoaspirate volumes were 2035 mL, 5385 mL, and 3106 mL for the arm, thigh, and leg, respectively with a mean adipose fraction of the lipoaspirate of 71%. All patients underwent redundant skin excision with the "flying squirrel" technique. The mean follow-up was 10.7 months (range 3 - 48 months) with a mean limb volume reduction of 32.2% and all patients reporting satisfactory relief of symptoms. All showed statistically significant improvement in LYMQOL in symptoms, appearance, and function. On ICGL, none showed worsened lymphatic drainage, rather, all showed improved lymph drainage. Furthermore, the improved lymph drainage was found to be progressive during the study period in all patients. Our study results demonstrate that treating extremity lymphedema with liposuction does not worsen lymphatic function and in fact, paradoxically, it induces progressive improvement in lymph drainage.
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Affiliation(s)
- W F Chen
- Center for Lymphedema Research and Reconstruction, Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH, USA
| | - S K Pandey
- Center for Lymphedema Research and Reconstruction, Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH, USA
| | - J N Lensing
- Center for Lymphedema Research and Reconstruction, Division of Plastic Surgery, University of Iowa, Iowa City, IA, USA
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3
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Mansi K, Kumar R, Narula D, Pandey SK, Kumar V, Singh K. Microwave-Induced CuO Nanorods: A Comparative Approach between Curcumin, Quercetin, and Rutin to Study Their Antioxidant, Antimicrobial, and Anticancer Effects against Normal Skin Cells and Human Breast Cancer Cell Lines MCF-7 and T-47D. ACS Appl Bio Mater 2022; 5:5762-5778. [PMID: 36417758 DOI: 10.1021/acsabm.2c00769] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Herein, we explore the biological properties of curcumin, quercetin, and rutin by loading them onto porous CuO nanorods (NRs). The CuO NRs were synthesized using the microwave irradiation method through a chemical reaction between CuSO4·5H2O and NaOH in the presence of the anionic stabilizer sodium dodecyl sulfate. The shape and surface morphology of CuO NRs were examined with two microscopic techniques: high-resolution transmission electron microscopy (HR-TEM) and field emission scanning electron microscopy (FESEM). Their average diameter was measured by TEM to be 15 ± 2 nm. The porosity and interfacial area of the fabricated material were determined by Brunauer-Emmett-Teller analysis. After successful synthesis, CuO NRs were loaded with polyphenolic curcumin, quercetin, and rutin, with the loading efficiency of 57.8, 62.2, and 81.2%, respectively, which was confirmed by UV-visible and infra-red spectroscopy and finally with a thermal gravimetric technique. Their radical scavenging activity was measured with the 2,2-diphenyl-1-picrylhydrazyl radical and compared with the control (ascorbic acid). Further, good bactericidal effects were observed against both Gram-positive bacterial strains, including Staphylococcus aureus and Bacillus subtilis, and Gram-negative bacterial strains, including Salmonella typhi, Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumoniae. Excellent anticancer activity was observed against normal skin cells and breast cancer cells T-47D and MCF-7.
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Affiliation(s)
- Kumari Mansi
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology & Management Sciences, Solan, Himachal Pradesh173212, India
| | - Raj Kumar
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology & Management Sciences, Solan, Himachal Pradesh173212, India.,Department of Chemistry, School of Basic and Applied Sciences, Maharaja Agrasen University, Baddi174103, India
| | - Dipika Narula
- Department of Chemistry, School of Basic and Applied Sciences, Maharaja Agrasen University, Baddi174103, India
| | - Satish Kumar Pandey
- Department of Biotechnology, School of Life Sciences, Mizoram University (Central University), Aizawl796004, India
| | - Vinod Kumar
- Department of Dermatology, Venerology and Leprology, Post Graduate Institute of Medical Education &Research (PGIMER), Chandigarh160012, India
| | - Kulvinder Singh
- Department of Chemistry, DAV College, Sector 10, Chandigarh160011, India
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Thakur N, Ghosh J, Kumar Pandey S, Pabbathi A, Das J. A comprehensive review on biosynthesis of magnesium oxide nanoparticles, and their antimicrobial, anticancer, antioxidant activities as well as toxicity study. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Pandey SK, Mohanta GC, Kumar V, Gupta K. Diagnostic Tools for Rapid Screening and Detection of SARS-CoV-2 Infection. Vaccines (Basel) 2022; 10:1200. [PMID: 36016088 PMCID: PMC9414050 DOI: 10.3390/vaccines10081200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/19/2022] [Accepted: 07/25/2022] [Indexed: 12/11/2022] Open
Abstract
The novel coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has severely impacted human health and the health management system globally. The ongoing pandemic has required the development of more effective diagnostic strategies for restricting deadly disease. For appropriate disease management, accurate and rapid screening and isolation of the affected population is an efficient means of containment and the decimation of the disease. Therefore, considerable efforts are being directed toward the development of rapid and robust diagnostic techniques for respiratory infections, including SARS-CoV-2. In this article, we have summarized the origin, transmission, and various diagnostic techniques utilized for the detection of the SARS-CoV-2 virus. These higher-end techniques can also detect the virus copy number in asymptomatic samples. Furthermore, emerging rapid, cost-effective, and point-of-care diagnostic devices capable of large-scale population screening for COVID-19 are discussed. Finally, some breakthrough developments based on spectroscopic diagnosis that could revolutionize the field of rapid diagnosis are discussed.
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Affiliation(s)
- Satish Kumar Pandey
- Department of Biotechnology, School of Life Sciences, Mizoram University (Central University), Aizawl 796004, India
| | - Girish C. Mohanta
- Materials Science and Sensor Applications, CSIR-Central Scientific Instruments Organisation (CSIR-CSIO), Chandigarh 160030, India;
| | - Vinod Kumar
- Department of Dermatology, Venerology and Leprology, Post Graduate Institute of Medical Education & Research, Chandigarh 160012, India;
| | - Kuldeep Gupta
- Russel H. Morgan, Department of Radiology and Radiological Sciences, School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA
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Sehrawat S, Sandhu N, Anand V, Pandey SK, Sharma A, Yadav RK, Singh AP, Singh AP. Study of 5-Bromo-2-Thiophene Carboxaldehyde Derived Novel Schiff Baseas a Biologically Active Agent as well as X-Ray Crystallographic Studyof C-S Coupled Benzothiazole. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Abhishek Singh T, Kundu M, Chatterjee S, Kumar Pandey S, Thakur N, Tejwan N, Sharma A, Das J, Sil PC. Synthesis of Rutin loaded nanomagnesia as a smart nanoformulation with significant antibacterial and antioxidant properties. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sandhu N, Pandey SK, Tittal RK, Kumar K, Singh AP, Yadav RK, Shrivastava R, Singh AP. Fluorescein dye derivative: Synthesis, characterization, quantum chemical and promising antimicrobial activity studies. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4364] [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: 11/06/2022]
Affiliation(s)
- Navjot Sandhu
- Department of Chemistry Chandigarh University Mohali India
| | - Satish Kumar Pandey
- Department of Biotechnology School of Life Sciences, Mizoram University (Central University) Aizawl India
| | - Ram Kumar Tittal
- Department of Chemistry National Institute of Technology Kurukshetra India
| | - Kamlesh Kumar
- Materials Science and Sensors Applications CSIR‐Central Scientific Instruments Organization Chandigarh India
| | | | - Rajesh K. Yadav
- Department of Applied Science (Chemistry) Madan Mohan Malaviya University of Technology Gorakhpur India
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Ateeq B, Kunju LP, Carskadon SL, Pandey SK, Singh G, Pradeep I, Tandon V, Singhai A, Goel A, Amit S, Agarwal A, Dinda AK, Seth A, Tsodikov A, Chinnaiyan AM, Palanisamy N. Molecular profiling of ETS and non-ETS aberrations in prostate cancer patients from northern India. Prostate 2021; 81:357-358. [PMID: 33683724 PMCID: PMC8565667 DOI: 10.1002/pros.24111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Tiwari R, Pandey SK, Goel S, Bhatia V, Shukla S, Jing X, Dhanasekaran SM, Ateeq B. Correction: SPINK1 promotes colorectal cancer progression by downregulating Metallothioneins expression. Oncogenesis 2021; 10:16. [PMID: 33619267 PMCID: PMC7900126 DOI: 10.1038/s41389-021-00305-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- R Tiwari
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India
| | - S K Pandey
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India
| | - S Goel
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India
| | - V Bhatia
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India
| | - S Shukla
- Michigan Center for Translational Pathology, University of Michigan, Ann Arbor, MI, USA
| | - X Jing
- Michigan Center for Translational Pathology, University of Michigan, Ann Arbor, MI, USA
| | - S M Dhanasekaran
- Michigan Center for Translational Pathology, University of Michigan, Ann Arbor, MI, USA.,Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - B Ateeq
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India.
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11
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Kumar M, Wangoo N, Gondil VS, Pandey SK, Lalhall A, Sharma RK, Chhibber S. Glycolic acid functionalized silver nanoparticles: A novel approach towards generation of effective antibacterial agent against skin infections. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.102074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Sharma A, Kumar S, Handa S, Pandey SK, Bhondekar AP. Early detection of Pseudomonas aeruginosa and Escherichia coli. using zinc tetraphenylporphyrin. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
The sensory characteristics of food are considerably effected by the metabolic processes of various micro-organisms in the food stored in the field or at ambient temperature. Also, this microbial contamination can pose serious health hazards to public health. Chemical analysis of the complex mixture of volatiles produced during bacterial growth and investigation methods of these microorganisms presents a big challenge. There remains major unmet need to shorten and improve detection methods. Therefore, early detection of the microorganisms will open many frontiers for quality control in the foodstuffs industry. Accordingly, the aim of this study was to assess the feasibility and performance of chemoreceptive sensors for the rapid detection of bacterial pathogens, specifically Pseudomonas aeruginosa and Escherichia coli.
In Uv/vis study, zinc tetraphenyl porphyrin solutions (in DMF) was tested with various volatile compounds, such as propanal, hexanal and heptanal which are commonly found to be released during the growth of bacteria. These sensors were used to detect the bacterial odours of two pathogenic species (E.coli and P.aeruginosa) during their growth cycle at 4 °C and ambient temperature.
Hypochromic shifts in Uv/vis and hydrogen bonding in FT-IR studies confirmed the interaction between the volatiles and porphyrin. The porphyrin used detected the presence of microorganisms after 12 hrs incubation and showed more sensitivity for volatiles released during aerobic activity P. aeruginosa as compared to E. coli at 4 °C and ambient temperature.
Zinc tetraphenyl porphyrin based chemoreceptive membranes has been proved successful for the detection of P. aeruginosa. Hence, the present study proves wide scope of improvement over current laboratory techniques for the detection of pathogens in terms of speed, ease of use, and cost.
Key messages
The developed technique allows rapid detection of spoiled food. Chemoreceptive property of porphyrin has been exploited for the early detection of bacteria.
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Affiliation(s)
- A Sharma
- Agrionics, CSIR-Central Scientific Instrument Organization, Chandigarh, Chandigarh, India
| | - S Kumar
- Agrionics, CSIR-Central Scientific Instrument Organization, Chandigarh, Chandigarh, India
| | - S Handa
- Agrionics, CSIR-Central Scientific Instrument Organization, Chandigarh, Chandigarh, India
| | - S K Pandey
- Department of Ubiquitous Analytical Technique, CSIR-Central Scientific Instrument Organization, Chandigarh, Chandigarh, India
| | - A P Bhondekar
- Agrionics, CSIR-Central Scientific Instrument Organization, Chandigarh, Chandigarh, India
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13
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Nandi P, Pandey SK, Giri C, Singh V, Petaccia L, Manju U, Mahanti SD, Topwal D. Probing the Electronic Structure of Hybrid Perovskites in the Orientationally Disordered Cubic Phase. J Phys Chem Lett 2020; 11:5719-5727. [PMID: 32609525 DOI: 10.1021/acs.jpclett.0c01386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hybrid organic-inorganic lead halide perovskites are projected as new generation photovoltaic and optoelectronic materials with improved efficiencies. However, their electronic structure so far remains poorly understood, particularly in the orientationally disordered cubic phase. We performed electronic structure investigations using angle-resolved photoemission spectroscopy on two prototypical samples (MAPbBr3 and MAPbCl3) in their cubic phase, and the results are compared with the calculations within two theoretical models where MA+ is orientationally (1) disordered (MA+ ion is replaced by spherically symmetric Cs+ ion) and (2) ordered (MA oriented along (100) direction) but keeping the symmetry of the unit cell cubic. Degeneracy of the valence bands and behavior of constant energy contours are consistent with model 1, which supports strongly the disordered nature of the orientation of the MA+ ions in the cubic phase. Band structure calculations also reveal that spin-orbit coupling induced Rashba splitting is suppressed by the orientational disorder.
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Affiliation(s)
- Pronoy Nandi
- Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400085, India
| | - S K Pandey
- Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Chandan Giri
- Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India
| | - Vijay Singh
- CEA, LITEN, 17 Rue des Martyrs, 38054 Grenoble, France
| | - L Petaccia
- ElettraSincrotrone Trieste, Strada Statale 14 km 163.5, I-34149, Trieste, Italy
| | - U Manju
- CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India
| | - Subhendra D Mahanti
- Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
| | - D Topwal
- Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400085, India
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Matai I, Pandey SK, Garg D, Rani K, Sachdev A. Phytogreen synthesis of multifunctional nano selenium with antibacterial and antioxidant implications. Nano Ex 2020. [DOI: 10.1088/2632-959x/ab8bea] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Abstract
The exploitation of plant extracts for the synthesis of nano selenium having antibacterial and antioxidant activities is an exciting approach to counteract the prevalence of infections caused by antibiotic-resistant bacteria, which holds relevance for medical and food industries. In the present work, a green and facile method for the preparation of nano selenium (nSe) using the fruit extract of Indian gooseberry (Phyllanthus Emblica) has been reported. The optical and structural properties of the as-synthesized nSe were studied through various characterization techniques. Eventually, the antioxidant potential of nSe was investigated via 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl free radical scavenging assays. Parallely, the antibacterial activity of nSe against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa was evaluated. The antioxidant assays indicated that even low dosage of nSe showed excellent activity with EC50 values of 0.21 μg ml−1 and 3.34 μg ml−1, respectively. Moreover, nSe exhibited significant inhibition in bacterial growth at low minimum inhibitory concentration (MIC) values against Escherichia coli (16 μg ml−1), Staphylococcus aureus (32 μg ml−1) and Pseudomonas aeruginosa (48 μg ml−1) compared to MIC values for standard drug ampicillin. Importantly, nSe did not induce any cytotoxic effects on normal human keratinocytes (HaCaT) at the tested concentrations; representing their biocompatible nature. The data obtained demonstrated the versatility of phytogreen nSe as a potent antioxidant and antibacterial agent to effectively prevent as well as treat multidrug-resistant bacterial infections.
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15
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Tiwari S, Pandey SK. Propylthiouracil-induced histological changes in the placenta of swiss albino mice. Natl J Clin Anat 2020. [DOI: 10.4103/njca.njca_34_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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16
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Pant M, Pant J, Pandey SK, Shukla RC. Study of pattern of origin of central branches of middle cerebral artery by using 64-slice computed tomography angiography. Natl J Clin Anat 2020. [DOI: 10.4103/njca.njca_3_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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17
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Wang DJ, Pandey SK, Lee DH, Sharma M. The Interpeduncular Angle: A Practical and Objective Marker for the Detection and Diagnosis of Intracranial Hypotension on Brain MRI. AJNR Am J Neuroradiol 2019; 40:1299-1303. [PMID: 31296521 DOI: 10.3174/ajnr.a6120] [Citation(s) in RCA: 10] [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] [Received: 04/02/2019] [Accepted: 06/06/2019] [Indexed: 01/29/2023]
Abstract
BACKGROUND AND PURPOSE Classic findings of intracranial hypotension on MR imaging, such as brain stem slumping, can be variably present and, at times, subjective, potentially making the diagnosis difficult. We hypothesize that the angle between the cerebral peduncles correlates with the volume of interpeduncular cistern fluid and is decreased in cases of intracranial hypotension. We aimed to investigate its use as an objective assessment for intracranial hypotension. MATERIALS AND METHODS Brain MRIs of 30 patients with intracranial hypotension and 30 age-matched controls were evaluated by 2 fellowship-trained neuroradiologists for classic findings of intracranial hypotension and the interpeduncular angle. Group analysis was performed with a Student t test, and receiver operating characteristic analysis was used to identify an ideal angle threshold to maximize sensitivity and specificity. Interobserver reliability was assessed for classic findings of intracranial hypotension using the Cohen κ value, and the interpeduncular angle, using the intraclass correlation. RESULTS The interpeduncular angle had excellent interobserver reliability (intraclass correlation coefficient value = 0.833) and was significantly lower in the intracranial hypotension group compared with the control group (25.3° versus 56.3°; P < .001). There was significant correlation between the interpeduncular angle and the presence of brain stem slumping (P < .001) and in cases with ≥3 classic features of intracranial hypotension (P = .01). With a threshold of 40.5°, sensitivity and specificity were 80% and 96.7%, respectively. CONCLUSIONS The interpeduncular angle is a sensitive and specific measure of intracranial hypotension and is a reliably reproducible parameter on routine clinical MR imaging.
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Affiliation(s)
- D J Wang
- From the Department of Medical Imaging (D.J.W.), Western University, London, Ontario, Canada.,Department of Medical Imaging (D.J.W., S.K.P., D.H.L., M.S.), London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - S K Pandey
- Department of Medical Imaging (D.J.W., S.K.P., D.H.L., M.S.), London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - D H Lee
- Department of Medical Imaging (D.J.W., S.K.P., D.H.L., M.S.), London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - M Sharma
- Department of Medical Imaging (D.J.W., S.K.P., D.H.L., M.S.), London Health Sciences Centre, University Hospital, London, Ontario, Canada.
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Govindaraj GN, Roy G, Mohanty BS, Balamurugan V, Pandey AK, Sharma V, Patel A, Mehra M, Pandey SK, Roy P. Evaluation of effectiveness of Mass Vaccination Campaign against Peste des petits ruminants in Chhattisgarh state, India. Transbound Emerg Dis 2019; 66:1349-1359. [PMID: 30839170 DOI: 10.1111/tbed.13163] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/16/2019] [Accepted: 02/19/2019] [Indexed: 11/27/2022]
Abstract
The study evaluated the effectiveness of 'Mass Vaccination Campaign (MVC)' implemented against the contagious transboundary OIE notified Peste des petits ruminants (PPR) in sheep and goats on the lines of 'pulse polio campaign' for humans in Chhattisgarh state, India. The effectiveness was evaluated on the axes of adequacy, financial viability under with and without MVC through differencing under various scenarios and options and programme impact from a farmer's perspective. The adequacy evaluation revealed that the reported outbreaks, diagnosed and death cases declined under PPR-MVC inconsonance with increased vaccination coverage. Furthermore, the seroconversion increased during post PPR-MVC implies elevated immunity levels in the sheep and goat population. The estimated mean mortality loss was USD 45.2 and USD 16.5 per animal in goats and sheep, respectively, whereas the treatment and opportunity cost of labour was USD 1.9 and USD 2.5 per animal respectively. Under the low PPR incidence scenario, benefit: cost ratio, net present value and internal rate of return were 4.9:1, 48.9 million USD and 146.6%, whereas it was 12.4:1,142.7 million USD and 430.4% and 13.5:1,156.7 million USD and 430.4% under medium and high incidence scenarios. Furthermore, the option of vaccinating 100% risk population during the first year followed by 30% during subsequent years to cover naïve population will maximize benefits than 100% coverage every year; nevertheless, benefits outweighs cost manifolds in both of these options. The farmers had a positive opinion on the overall services provided under PPR-MVC and the results provide the empirical evidence on effectiveness of 'mass vaccination' for its replication in other states of India or countries with similar socio-economic and rearing environments.
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Affiliation(s)
- Gurrappa Naidu Govindaraj
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bangalore, India
| | - Goutam Roy
- Department of Animal Husbandry, Government of Chhattisgarh, Raipur, India
| | - Barada Shankar Mohanty
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bangalore, India
| | | | - Arvind Kumar Pandey
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bangalore, India
| | - Varsha Sharma
- Animal Disease Diagnostic Laboratory, Department of Animal Husbandry, Government of Chhattisgarh, Raipur, India
| | - Aparna Patel
- Animal Disease Diagnostic Laboratory, Department of Animal Husbandry, Government of Chhattisgarh, Raipur, India
| | - Mausam Mehra
- Department of Animal Husbandry, Government of Chhattisgarh, Raipur, India
| | - S K Pandey
- Department of Animal Husbandry, Government of Chhattisgarh, Raipur, India
| | - Parimal Roy
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bangalore, India
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Kumar S, Sharma SK, Kaushik G, Avti PK, Pandey SK, Sarma P, Medhi B, Khanduja KL. Therapeutic potential of arachidonyl trifluromethyl ketone, a cytosolic phospholipaseA 2 IVA specific inhibitor, in cigarette smoke condensate-induced pathological conditions in alveolar type I & II epithelial cells. Toxicol In Vitro 2019; 54:215-223. [PMID: 30253184 DOI: 10.1016/j.tiv.2018.09.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/07/2018] [Accepted: 09/19/2018] [Indexed: 11/18/2022]
Abstract
Cigarette smoke is responsible for multiple disorders and causes almost 10 million annual deaths globally but underlying mechanisms are still underexplored. Continuous exposure of Cigarette smoke condensate (CSC) leads to cytosolic phospholipase A2 (cPLA2) mediated high free radicals where cPLA2s seems to play crucial role in generated various patho-physiological conditions such as chronic inflammation, oxidative stress and cancer. In this view, we assessed the therapeutic potential of arachidonyl trifluromethyl ketone (ATK), a cPLA2 inhibitor, via pharmacological inhibition of most expressible CSC-induced cPLA2 group IVA in type-I and type-II alveolar epithelial cells. The In Vitro inhibitory effect of ATK on CSC-induced PLA2 activity and its cellular role were assessed in terms of cell viability, fluorescein diacetate (FDA) dye uptake assay for membrane integrity, reactive oxygen species (ROS)/reactive nitrogen species (RNS) levels and pro apoptotic as well as anti apoptosis markers via flow cytometry, along with extracellular signal-regulated kinases (ERK) levels using enzyme-linked immunosorbent assay (ELISA). The experimental findings demonstrated that ATK acts as potent inhibitor of cPLA2 activity and shown its effectiveness as therapeutic agent by significantly mimicking CSC-induced levels of free radicals, primary apoptosis, ratio of pro-apoptotic/apoptotic proteins and levels of ERK whereas protected cells from loss of cell viability and membrane integrity. Thus, this study is an important step towards the opening up of avenues for the applicability of the cPLA2 isoform specific inhibitors such as ATK for pre-clinical and clinical studies and could be beneficial during smoking-induced lung pathological conditions.
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Affiliation(s)
- Subodh Kumar
- Department of Biophysics, PGIMER, Chandigarh 160012, India.
| | - Sanjeev Kumar Sharma
- Department of Biophysics, PGIMER, Chandigarh 160012, India; Rajiv Gandhi Cancer Institute & Research Centre (RGCIRC), Rohini, New Delhi 110085, India
| | - Gaurav Kaushik
- Department of Biophysics, PGIMER, Chandigarh 160012, India; Surgery, School of Medicine, KU Medical Center (KUMC), Kansas City KS-66160, USA
| | | | - Satish Kumar Pandey
- Central Scientific Instruments Organisation (CSIO), Chandigarh 160030, India
| | - Phulen Sarma
- Present address: Department of Pharmacology, PGIMER, Chandigarh 160012, India
| | - Bikash Medhi
- Present address: Department of Pharmacology, PGIMER, Chandigarh 160012, India
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20
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Pandey SK, Singh S, Mehta SK. Ultrasonication assisted fabrication of l-lysine functionalized gadolinium oxide nanoparticles and its biological acceptability. Ultrason Sonochem 2018; 49:53-62. [PMID: 30057179 DOI: 10.1016/j.ultsonch.2018.07.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 05/12/2018] [Revised: 07/09/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
Gadolinium oxide nanoparticles (GdO) have recently gained attention due to their diverse bio-applications. However, their functionalization with amino acids has not been reported yet to the best of our knowledge. In the present report, the potential of sonication technique (for the first time to the best of our knowledge) in the fabrication of GdO nanoparticles was explored. Sonication is an efficient technique for the synthesis of evenly dispersing nanoparticles in liquids thus, the present report highlights the use of ultrasonication technique for the fabrication of uniform 2 nm sized luminescent l-lysine coated gadolinium oxide nanoparticles (l-lysine@GdO). Investigation of l-lysine conjugation with nanoparticles was confirmed by FT-IR, Differential Scanning Calorimetric analysis and Zeta potential. The interactions of serum protein (BSA) with synthesized nanoparticles have been explored using UV-visible spectroscopy, Fluorescence spectroscopy and Circular Dichroism (CD). The synthesized l-lysine coated nanoparticles demonstrated potential for antimicrobial and antifungal agents, which has been tested against two bacterial strains Escherichia coli and Staphylococcus aureus and two antifungal Candida albicans and Candida glabrata cells. The minimal inhibition concentrations (MIC) of nanoparticles against E.coli and S. aureus are 8 µg mL-1 and 16 µg mL-1, respectively. The cell viability, MTT assay on HaCaT cell lines revealed the non-toxicity of synthesized nanoparticles.
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Affiliation(s)
- Satish Kumar Pandey
- CSIR - Central Scientific Instruments Organization, Sector-30, Chandigarh 160030, India
| | - Suman Singh
- CSIR - Central Scientific Instruments Organization, Sector-30, Chandigarh 160030, India
| | - S K Mehta
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India.
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21
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Aashima, Pandey SK, Singh S, Mehta SK. Biocompatible gadolinium oxide nanoparticles as efficient agent against pathogenic bacteria. J Colloid Interface Sci 2018; 529:496-504. [PMID: 29945019 DOI: 10.1016/j.jcis.2018.06.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 01/14/2023]
Abstract
The inappropriate and surfeit use of antibiotics have generated a hunt for safe and alternative antimicrobial agents against pathogenic bacteria. With the advancement in nanoscience and nanotechnology, promising opportunities for examining the bacterial effect of metal nanoparticles were demonstrated in literature. Focusing on this, our present study presentssynthesis of l-ascorbic coated gadolinium oxide nanoparticles via a simple precipitation route. Their complete characterization and detailed stability studies were carried out. The obtained nanoparticles were characterized by Fourier transform infrared (FT-IR) spectroscopy, confirming that l-ascorbic acid onto the surface of nanoparticles. The size and morphology were analyzed by Transmission electron Microcopy (TEM) and Field emission scanning electron microscopy (FE-SEM) which reveals their spherical nature. The stability studies were performed to know about their chemical and colloidal stability. The synthesized nanoparticles were found to be non-toxic to HaCaT cells upto the concentration of 125 µg/mL. The antimicrobial effect of nanoparticles was analyzed against three bacterial strains; E. coli, S. aureus and S. typhimurium. To summarize, the synthesized nanoparticles are found to be safe and protective against pathogenic bacteria. They further can be explored in biomedical applications considering their non-toxic nature.
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Affiliation(s)
- Aashima
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - Satish Kumar Pandey
- CSIR - Central Scientific Instruments Organization, Sector-30, Chandigarh 160030, India
| | - Suman Singh
- CSIR - Central Scientific Instruments Organization, Sector-30, Chandigarh 160030, India
| | - S K Mehta
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India.
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Pandey S, Pandey SK, Shah V. Role of HAMP Genetic Variants on Pathophysiology of Iron Deficiency Anemia. Indian J Clin Biochem 2018; 33:479-482. [PMID: 30319197 DOI: 10.1007/s12291-017-0707-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/16/2017] [Indexed: 12/21/2022]
Abstract
Hepcidin is a 25-amino acid peptide hormone produced by hepatocytes and plays a key role in body iron metabolism. Hepcidin deficiency is the cause of iron overload in hereditary hemochromatosis, iron-loading anemia, and its excess is associated with anemia of inflammation, chronic disease and iron deficiency anemia (IDA). The aims of this study was to evaluate HAMP gene mutation, namely IVS2 + 1(-G) (c.148-150 + 1del) and Gly71 Asp (c.212G > A (rs104894696) association with iron status in IDA conditions. Our study participants were 500 IDA patients and 550 age and sex-matched healthy controls. Hepcidin, ferritin and CRP analysis was done by ELISA method while ESR analysis was done according to Wintrobe method. CBC analysis was done by auto-analyzer. Two mutations in the HAMP genes were analysed by PCR RFLP method. Among the IDA patients, 7 were heterozygous for Met50del IVS2 + 1(-G) mutation. Nine IDA patients were heterozygous for G71D G-A mutation and homozygous were not identified in both mutations.Controls were showing heterozygous frequency 1.8 and 2.1% of Met50del IVS2 + 1(-G) and G71D G-A mutations respectively. Mutation of HAMP (Met50del IVS2 + 1(-G) and G71D G-A) were clinically associated with IDA and act as modulator of disease.
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Affiliation(s)
- S Pandey
- Centre for Biotechnology Studies, Awadhesh Pratap Singh University, Rewa, M.P. 486003 India
| | - S K Pandey
- Centre for Biotechnology Studies, Awadhesh Pratap Singh University, Rewa, M.P. 486003 India
| | - V Shah
- Centre for Biotechnology Studies, Awadhesh Pratap Singh University, Rewa, M.P. 486003 India
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Kumar R, Kaur K, Pandey SK, Kumar R, Uppal S, Mehta S. Fabrication of benzylisothiocynate encapsulated nanoemulsion through ultrasonication: Augmentation of anticancer and antimicrobial attributes. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.110] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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24
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Parashar V, Ghosh B, Gaur NL, Shamal SN, Pandey SK, Shah GL. TERATOLOGICAL EFFECTS OF CARBOPLATIN: A MORPHOLOGICAL STUDY IN MICE. ACTA ACUST UNITED AC 2016. [DOI: 10.16965/ijar.2016.218] [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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25
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Ain Q, Pandey SK, Pandey OP, Sengupta SK. Synthesis, spectroscopic, thermal and antimicrobial studies of neodymium(III) and samarium(III) complexes derived from tetradentate ligands containing N and S donor atoms. Spectrochim Acta A Mol Biomol Spectrosc 2015; 140:27-34. [PMID: 25579799 DOI: 10.1016/j.saa.2014.12.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 10/19/2014] [Revised: 12/02/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
Trivalent lanthanide complexes of the type [Ln(L)Cl(H2O)2] (where Ln=Nd(III) or Sm(III) and LH2=Schiff bases derived by the condensation of 3-(phenyl/substitutedphenyl)-4-amino-5-mercapto-1,2,4-triazole with diacetyl/benzil) have been synthesized by the reactions of anhydrous lanthanide(III) chloride with Schiff bases in methanol. The structures of the complexes have been proposed on the basis of elemental analysis, electrical conductance, magnetic moment, spectroscopic measurements (IR, 1H, 13C NMR and UV-vis spectra) and X-ray diffraction studies. The spectral data reveal that the Schiff base ligands behave as dibasic tetradentate chelating agents having coordination sites at two thiol sulfur atoms and two azomethine nitrogen atoms. The presence of coordinated water in metal complexes was confirmed by thermal and IR data of the complexes. All the Schiff bases and their metal complexes have also been screened for their antibacterial activity against Bacillus subtilis, Staphylococcus aureus and antifungal activities against Aspergillus niger, Curvularia pallescens and Colletotrichum capsici.
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Affiliation(s)
- Qurratul Ain
- Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur 273009, India
| | - S K Pandey
- Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur 273009, India
| | - O P Pandey
- Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur 273009, India
| | - S K Sengupta
- Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur 273009, India.
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Sharma S, Pandey SK. Investigation of thermoelectric properties of half-metallic Co₂MnGe by using first principles calculations. J Phys Condens Matter 2014; 26:215501. [PMID: 24787369 DOI: 10.1088/0953-8984/26/21/215501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
By combining the electronic structures obtained from first principles calculations with Boltzmann transport theory we have investigated the electronic, magnetic and transport properties of the Co2MnGe Heusler compound. The density of state plots, dispersion curves and the total energy of paramagnetic and ferromagnetic (FM) phases clearly show the half-metallic FM ground state for the compound, with an indirect band gap of about 400 meV in the minority spin channel. It has an integer value of the magnetic moment equal to 5 μ(B). In the FM phase a very large value (∼ 550 µV K(-1)) of the Seebeck coefficient (S) is obtained for down-spin electrons due to the existence of an almost flat conduction band along X in the Γ direction. The two-current model has been used to find the total S and the obtained value is about 10 µV K(-1). The calculated values of the Seebeck coefficient, resistivity and electronic thermal conductivity show nice agreement with the experimental results.
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Affiliation(s)
- S Sharma
- School of Engineering, Indian Institute of Technology Mandi, Kamand - 175005, Himachal Pradesh, India
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Pandey SK, Chandra KK. Impact of integrated nutrient management on tomato yield under farmers field conditions. J Environ Biol 2013; 34:1047-1051. [PMID: 24555335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Field trials were conducted in farmer's field of district Chandauli, Uttar Pradesh, India to assess the impact of integrated nutrient management (INM) on the performance of tomato crop during rabi (2008) and kharif (2009) season. Before conducting trials technological gap between actual and potential productivity were analyzed by interviewing growers to find out the major causes for low yield. Overall gap in use of fertilizers was recorded 64.90 % whereas overall mean gap in technology was 43.83%. On-farm experiments on INM were conducted by applying FYM (10t ha(-1)) + (NPK (150:80:60 kg ha(-1)) followed by dipping seedling roots in 1% Azotobacter solution for 15 min and foliar spray with 20 ppm ferrous ammonium sulphate after 30, 45 and 75 days of transplantation. The plant height, root length, number of primary branches, average fruit weight increased in INM plots as compared to farm practice. The increment in yield was found to be 28.84 and 33.86% during rabi and kharif season respectively. The maximum marketable yield obtained in INM plot during kharif and rabi seasons was 1025 q ha(-1) and 955 q ha(-1) respectively, whereas as farm practice yielded 740 q ha(-1) and 713 q ha(-1) during the same seasons. The percent loss from total production was recorded 8.5 % and 8.8 % in control plot and only 4.9 % and 5.7 % in INM plot during rabi and kharif seasons respectively. The higher fruit weight and lower incidence of disease and pest were observed in INM field in comparison to farm practice. The benefit cost ratio with INM treatment was recorded 4.25 and 4.23 in rabi and kharif season respectively against the benefit cost ratio of 2.98 and 2.82 in control plot during the same respective seasons.
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Affiliation(s)
- S K Pandey
- Indira Gandhi National Open University, Regional Office, Darbhanga--846 004, India
| | - K K Chandra
- Department of Forestry, Wildlife and Environmental Sciences, Guru Ghasidas Central Vishwavidyalaya, Bilaspur--495 009, India
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Bapna K, Choudhary RJ, Pandey SK, Phase DM. Implication of local moment at Ti and Fe sites for the electrical and magneto-transport properties of degenerate semiconducting Ti₁-xFexO₂-d epitaxial films. J Phys Condens Matter 2012; 24:056004. [PMID: 22251929 DOI: 10.1088/0953-8984/24/5/056004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have investigated the effect of local magnetic moment on the electrical and magneto-transport properties of thin films of the degenerate semiconductor Ti(1-x)Fe(x)O(2-d) (x = 0,0.04). The electrical measurements of these films reveal high temperature metallic behavior and resistivity minima. The behavior below the resistivity minimum temperature is ascribed to Kondo like scattering. The coupling between the local moment and the charge carriers is reflected in the magnetoresistance measurements in these films. This work indicates competition between the magnetic ordering mechanism by J(RKKY) and the moment screening mechanism by J(Kondo). Accordingly the role of carrier density in achieving the magnetic ordering in such materials either by defect engineering or by transition metal doping is discussed.
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Affiliation(s)
- Komal Bapna
- UGC DAE Consortium for Scientific Research, Khandwa Road, Indore-452001, India
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Pandey SK, Suri CR, Chaudhry M, Tiwari RP, Rishi P. A gold nanoparticles based immuno-bioprobe for detection of Vi capsular polysaccharide of Salmonella enterica serovar Typhi. Mol BioSyst 2012; 8:1853-60. [DOI: 10.1039/c2mb25048a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pandey SK, Chaube MK, Tripathi D. Peristaltic transport of multilayered power-law fluids with distinct viscosities: a mathematical model for intestinal flows. J Theor Biol 2011; 278:11-9. [PMID: 21377477 DOI: 10.1016/j.jtbi.2011.02.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Revised: 02/25/2011] [Accepted: 02/25/2011] [Indexed: 10/18/2022]
Abstract
This paper is concerned with the theoretical study of two-dimensional peristaltic flow of power-law fluids in three layers with different viscosities. The analysis is carried out under low Reynolds number and long wavelength approximations. The shapes of the interfaces are described by a system of non-linear algebraic equations which are solved numerically as streamlines. It is found that the non-uniformity in the intermediate and peripheral layers diminishes when the viscosity of the intermediate layer is increased and that of the outermost layer is kept unaltered for both the pseudo-plastic and dilatant fluids. Similar are the observations when the viscosity of the outermost layer is increased and that of the intermediate layer is kept fixed. The flow rate increases with the viscosities of the peripheral and the intermediate layers but the viscosity of the outermost layer is more effective. However, the knowledge of the effect of the viscosity of the intermediate layer facilitates us to achieve the required flow rate without disturbing the outermost layer. An increase in the flow behaviour index too favours larger flow rates. The trapping limits increase with the viscosity of the intermediate layer but decrease with the viscosity of the outermost layer and the flow behaviour index. Thus, a medicinal intervention that creates a more viscous intermediate layer and reduces pseudo plasticity may reduce constipation.
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Affiliation(s)
- S K Pandey
- Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi 221005, India.
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Pandey SK, Banik RM. Extractive fermentation for enhanced production of alkaline phosphatase from Bacillus licheniformis MTCC 1483 using aqueous two-phase systems. Bioresour Technol 2011; 102:4226-4231. [PMID: 21227688 DOI: 10.1016/j.biortech.2010.12.066] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 12/11/2010] [Accepted: 12/14/2010] [Indexed: 05/30/2023]
Abstract
A study was made to find out maximum partitioning of Bacillus licheniformis alkaline phosphatase in different ATPSs composed of different molecular weight of PEG X (X=2000, 4000, 6000) with salts (magnesium sulphate, sodium sulphate, sodium citrate) and polymers (dextran 40, dextran T500). Physicochemical factors such as effect of system pH, system temperature and production media were evaluated for partitioning of alkaline phosphatase. PEG 4000 [9.0% (w/v)] and dextran T500 [9.6% (w/v)] were selected as most suitable system components for alkaline phosphatase production by B. licheniformis based on greater partition coefficient (k=5.23). The two-phase system produced fewer enzymes than the homogeneous fermentation (control) in early stage of fermentation, but after 72 h the enzyme produced in the control system was less than that in the ATPS. Total alkaline phosphatase yield in ATPS fermentation was 3907.01 U/ml and in homogeneous fermentation 2856.50 U/ml.
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Affiliation(s)
- S K Pandey
- School of Biochemical Engineering, Institute of Technology, Banaras Hindu University, Varanasi 221005, India
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32
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Dicken M, Munday JS, Archer RM, Mayhew IG, Pandey SK. Cutaneous fungal granulomas due to Alternaria spp. infection in a horse in New Zealand. N Z Vet J 2011; 58:319-20. [PMID: 21151220 DOI: 10.1080/00480169.2010.69765] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Equine cutaneous fungal granulomas have been previously referred to in New Zealand (Fairley 1998), and are described in the veterinary literature from around the world, including North America and Australia (Pascoe and Summers 1981; Genovese et al. 2001; Valentine et al. 2006), but no peer-reviewed reports appear published in the literature in New Zealand. Described here is a case of multiple cutaneous fungal granulomas caused by Alternaria spp. in a horse in New Zealand.
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Singh N, Pandey SK, Tripathi RP. Regioselective [3+2] cycloaddition of chalcones with a sugar azide: easy access to 1-(5-deoxy-D-xylofuranos-5-yl)-4,5-disubstituted-1H-1,2,3-triazoles. Carbohydr Res 2010; 345:1641-8. [PMID: 20579636 DOI: 10.1016/j.carres.2010.04.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Revised: 04/15/2010] [Accepted: 04/21/2010] [Indexed: 11/18/2022]
Abstract
[3+2] Cycloaddition of 5-azido-5-deoxy-1,2-O-isopropylidene-alpha-d-xylofuranose with 1,3-diphenyl-prop-3-enones, followed by oxidation of the intermediate triazolines in a tandem manner, led to the regioselective formation of 4-benzoyl-1-(5-deoxy-1,2-O-isopropylidene-alpha-d-xylofuranos-5-yl)-5-phenyl-1H-1,2,3-triazoles in moderate to good yields.
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Affiliation(s)
- Nimisha Singh
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Lucknow 226 001, CSIR, India
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35
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Marwaha RS, Pandey SK, Kumar D, Singh SV, Kumar P. Potato processing scenario in India: Industrial constraints, future projections, challenges ahead and remedies - A review. J Food Sci Technol 2010; 47:137-56. [PMID: 23572617 DOI: 10.1007/s13197-010-0026-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/11/2009] [Accepted: 07/15/2009] [Indexed: 11/24/2022]
Abstract
Indian potato (Solanum tuberosum L.) processing industry has emerged fast due to economic liberalization coupled with growing urbanization, expanding market options and development of indegenous processing varieties. India's first potato processing varieties 'Kufri Chipsona-1' and 'Kufri Chipsona-2' were developed in 1998, followed by an improved processing variety 'Kufri Chipsona-3' in 2005 for the Indian plains and first chipping variety 'Kufri Himsona' for the hills. These varieties have >21% tuber dry matter content, contain low reducing sugars (<0.1% on fresh wt) and are most suitable for producing chips, French fries and dehydrated products. The availability of these varieties and standardization of storage techniques for processing potatoes at 10-12°C with sprout suppressant isopropyl N-(3-chlorophenyl) carbamate have revolutionized the processing scenario within a short span of 10 years. Currently about 4% of total potato produce is being processed in organized and unorganized sector. Potato processing industry mainly comprises 4 segments: potato chips, French fries, potato flakes/powder and other processed products. However, potato chips still continue to be the most popular processed product. The major challenge facing the industries lies in arranging round the year supply of processing varieties at reasonable price for their uninterrupted operation, besides several others which have been discussed at length and addressed with concrete solutions.
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Affiliation(s)
- R S Marwaha
- Central Potato Research Station, Post Bag Nr 1, Jalandhar, 144 003 India
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36
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Stump RJW, Lovicu FJ, Ang SL, Pandey SK, McAvoy JW. Lithium stabilizes the polarized lens epithelial phenotype and inhibits proliferation, migration, and epithelial mesenchymal transition. J Pathol 2007; 210:249-57. [PMID: 16924593 DOI: 10.1002/path.2049] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Posterior capsule opacification (PCO) is a common complication of cataract surgery caused by epithelial mesenchymal transition (EMT) and aberrant lens cell growth. One path to prevention depends on maintaining the quiescent lens epithelial phenotype. Here we report that lithium chloride (LiCl) is a potent stabilizer of the lens epithelial phenotype. In lens epithelial explants (controls), at low cell density, cells readily depolarized, spread out, and proliferated. By contrast, in the presence of LiCl, cells did not spread out or exhibit migratory behaviour. Using concentrations of 1-30 mM LiCl we also showed that cell proliferation is inhibited in a dose-dependent manner. Confocal microscopy and immunohistochemistry for ZO-1 and E-cadherin showed that LiCl treatment maintained tight junctions at the apical margins of cells. Taken together with measurements of cell heights, this showed that the cells in LiCl-treated explants maintained the apical baso-lateral polarity and cobblestone-like packing that is characteristic of lens epithelial cells in vivo. Significantly, the effects of LiCl also extended to blocking the potent EMT/cataract-promoting effects of transforming growth factor beta (TGFbeta) on lens epithelial cells. In TGFbeta-treated explants, cells progressively dissociated from one another, taking on various elongated spindle shapes and strongly expressing alpha-smooth muscle actin (alpha-SMA). These features are characteristic of PCO. In both rat and human capsulorhexis explants, LiCl treatment effectively blocked the accumulation of alpha-SMA and maintained the cells in a polarized, adherent, cobblestone-packed monolayer. These findings highlight the feasibility of applying molecular strategies to stabilize lens epithelial cells and prevent aberrant differentiation and growth that leads to cataract.
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Affiliation(s)
- R J W Stump
- Save Sight Institute, University of Sydney, NSW, Australia
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37
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Abstract
The study was conducted on 317 cases of poisoning in the Varanasi region, India, between January 2002 and August 2003. Aluminium phosphide (Celphos) was used by 239 victims (75.40% of the total) and was used in 69.03% of male and 30.96% of female cases. It was commoner in males from both rural and urban areas and in the 21-30 year age group. Microscopic investigation of the cerebral and cerebellar cortex showed distinct changes due to the effect of celphos. Findings in the cerebral cortex revealed disorganisation of the different layers, round shaped neurons with a convex border, degenerated Nissl granules in the cytoplasm and a deeply stained degenerated eccentric nucleus. Findings in the cerebellar cortex included degenerated neurons, the infiltration of round cells into the molecular layer and the disappearance of the processes of Purkinje cells. Degenerate nuclei were surrounded by scavenger cells in the granular layer. The subcortical zone of the brain revealed a paucity of glial cells, degeneration of nerve fibres and the appearance of necrotic patches.
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Affiliation(s)
- S K Tripathi
- Department of Forensic Medicine, Institute of Medical Sciences Benaras Hindu University, Varanasi, India
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Patra M, Pandey SK, Ramamurthy T, Singh DV, Das SK. Characterization of cytotoxin-producing Aeromonas caviae (strain HT10) isolated from a sulfur spring in Orissa, India. Lett Appl Microbiol 2007; 44:338-41. [PMID: 17309514 DOI: 10.1111/j.1472-765x.2007.02108.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
During a study of microbial diversity, a bacterial strain designated HT10, was isolated from sediment collected from an unexplored sulfur spring at Athamallik, Orissa, India. Various biochemical tests and 16S rDNA sequence analysis revealed that strain HT10 is Aeromonas caviae. The growth temperature of this strain ranged from 12 to 43 degrees C and the optimum temperature was 30 degrees C. The strain HT10 showed cytotoxic and alpha-hemolytic activity. This is the first report on the isolation of Aeromonas caviae from sulfur spring.
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Affiliation(s)
- M Patra
- Department of Biotechnology, Institute of Life Sciences, Bhubaneswar, Orissa, India
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Abstract
Imidazoline derivatives, a class of novel cationic surfactants are presently gaining importance in global detergent market due to their wide range of applications. These are extensively used mainly as fabric softeners and antistatic agents. The present communication reviews the preparation, reaction scheme, reaction rates and properties of imidazoline derivatives. The analysis of imidazoline derivatives, its mode of action, their biodegradation and various applications have also been discussed.
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Affiliation(s)
- Rashmi Tyagi
- Department of Chemical Engineering, Jaypee Institite of Engineering and Technology, Guna, India
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40
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Abstract
The variations in formation, location, and courses of the cords of brachial plexus and the median nerve were studied in both axillae of 172 cadavers. The total prevalence of variation was 12.8% (CI, 7.6-17.4) and it was found in 13.2% (CI, 7.5-18) of male and in 10.7% (CI, -0.6-19.6) of female cadavers. These variations were divided into three groups. The first group was abnormal location of the cords, which was either posterolateral or anteromedial in relation to the axillary artery in 2.3% (CI, 0.1-4.5) cadavers. The lateral cord and the medial root of the median nerve had received communicating branches from the posterior cord in most of the cases of this group. The second group was absence of the posterior cord in 3.5% (CI, 0.7-6.1) of cadavers. The lateral and medial cords of this group were connected with the communicating branches, which had a course in front of the axillary artery. The third group was abnormal formation and course of the median nerve in 7% (CI, 3.1-10.6) of cadavers. In all cases of this group the medial root received communicating branch/branches either from the lateral or posterior cord. In eight (4.7%) cadavers, both roots of the median nerve were joined on medial side of the axillary artery to form a median nerve, which traveled medial to the artery. In four (2.3%) cadavers the roots of the median nerve did not join and both traveled separately anteromedial to the axillary and brachial arteries. This study indicates that all three cords and median nerve vary considerably in levels of origin, location and course in relation to the axillary artery and these variable cases were joined with the communicating branch/branches. The observed variations are of anatomical and clinical interest. These kinds of variations are more prone to injury in radical neck dissection and in other surgical operation of the axilla.
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Affiliation(s)
- S K Pandey
- Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India.
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Hore SK, Ahuja V, Mehta G, Kumar P, Pandey SK, Ahmad AH. Effect of aqueous Euphorbia hirta leaf extract on gastrointestinal motility. Fitoterapia 2006; 77:35-8. [PMID: 16257136 DOI: 10.1016/j.fitote.2005.06.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2003] [Accepted: 06/20/2005] [Indexed: 10/25/2022]
Abstract
The aqueous leaf extract of Euphorbia hirta decreased the gastrointestinal motility in normal rats and decreased the effect of castor oil-induced diarrhoea in mice.
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Affiliation(s)
- S K Hore
- Department of Pharmacology and Toxicology, College of Veterinary Sciences, G. B. Pant University of Agriculture and Technology, Pantnagar-263 145, Uttaranchal, India.
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Hickman MS, Werner L, Mamalis N, Sung E, Goldstein D, Vroman DT, Pandey SK. Intraoperative explantation of two single-piece hydrophobic acrylic intraocular lenses due to surface deposits. Eye (Lond) 2005; 20:1054-60. [PMID: 16294206 DOI: 10.1038/sj.eye.6702124] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To report clinical, pathological, and laboratory analyses of two cases of single-piece hydrophobic acrylic intraocular lenses (IOLs), which presented with significant surface deposits during implantation. METHODS The lenses were implanted with the manufacturer's recommended injector (loaded with Viscoat and Healon GV, respectively). Immediately after injection into the anterior chamber, areas on the lenses' surfaces were covered by deposits, which could not be entirely removed by irrigation/aspiration. The lenses were explanted and replaced with lenses of the same design. They underwent gross analyses, light microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy for analysis of the elemental composition of the deposits. Liquid chromatography/mass spectroscopy was also performed to identify the presence of proteins. RESULTS The deposits on the first lens had a granular appearance, forming a homogeneous layer mostly on the posterior lens surface. Larger crystal-like deposits were present mostly on the anterior surface of the second lens. Elemental analyses of the deposits in both cases revealed the presence of peaks of sodium, chloride, phosphate, and potassium, in addition to the peaks of carbon and oxygen (normal constituents of the lens material). Only protein components normally found in the anterior chamber during surgery, such as haemoglobin and albumin, were identified. CONCLUSIONS The results obtained suggest that the deposits in both cases may have resulted from crystallization of the ophthalmic viscosurgical device normally used during the loading of the IOLs into the cartridges.
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Affiliation(s)
- M S Hickman
- John A Moran Eye Center, University of Utah, Salt Lake City, USA
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Pandey SK, Sahay A, Pandey RS, Tripathi YB. Effect ofAsparagus racemosus rhizome (Shatavari) on mammary gland and genital organs of pregnant rat. Phytother Res 2005; 19:721-4. [PMID: 16177978 DOI: 10.1002/ptr.1590] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Asparagus racemosus (AR) Willd (family Liliaceae) is commonly known as Shatavari. The alcoholic extract of its rhizome was administered orally to adult pregnant female albino rats at a dose of 30 mg/100 g body weight, daily for 15 days (days 1-15 of gestation). The macroscopic findings revealed a prominence of the mammary glands, a dilated vaginal opening and a transversely situated uterine horn in the treated group of animals. The weight of the uterine horns of the treated group was found to be significantly higher (p < 0.001) but the length was shorter (p > 0.01). Microscopic examination of the treated group showed proliferation in the lumen of the duct of mammary gland. It was obliterated due to hypertrophy of ductal and glandular cells. Hyperplasia of the glandular and muscular tissue and hypertrophy of the glandular cells were observed in the genital organs. The parenchyma of the genital organs showed abundant glycogen granules with dilated blood vessels and thickening of the epithelial lining. The oviduct in the treated group showed hypertrophied muscular wall, whereas the ovary revealed no effect of the drug. The results suggest an oestrogenic effect of Shatavari on the female mammary gland and genital organs.
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Affiliation(s)
- S K Pandey
- Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India.
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Abstract
The variations in orgin, course, and terminal branching pattern of the splenic artery were studied in 320 cadavers. The artery originated from the coeliac trunk in the majority of cadavers (90.6%), followed by abdominal aorta (8.1%), and other sights (1.3%). A suprapancreatic course of the artery was commonly observed (74.1%) followed by enteropancreatic (18.5%), intrapancreatic (4.6%), and retropancreatic (2.8%) courses. In two cases (0.63%) the proximal part of the splenic artery made a loop that was embedded in the substance of the pancreas, which is an interesting and rare finding. In five cases (1.5%) the proximal part of the artery divided into two or more branches that had suprapancreatic and enteropancreatic courses. The splenic artery divided into terminal branches in 311 (97%) cadavers. In nine (2.8%) cadavers it passed through the hilum of spleen without dividing. Two terminal branches were the most common (63.1%) followed by four (18.8%), six (9.7%), and more than six (5.6%) branches. The present study clearly indicates that there is variation in origin, course, and terminal distribution pattern of the splenic artery. The knowledge of these variations are of significant importance during surgical and radiological procedure of upper abdominal region to avoid any catastrophic complications.
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Affiliation(s)
- S K Pandey
- Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
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45
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Pandey SK, Gangopadhyay AN, Tripathi SK, Shukla VK. Anatomical variations in termination of the axillary artery and its clinical implications. Med Sci Law 2004; 44:61-66. [PMID: 14984216 DOI: 10.1258/rsmmsl.44.1.61] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Variations in the termination of the axillary artery (AA) were observed in 51 out of 356 axilla during routine dissections. The incidence of variation was higher on the right axilla in 17.42% cases (CI: 11.60-22.51) than the left axilla 11.24% cases (CI: 6.46-15.55) and was found to be 12.33% in male and 40.63% in female cadavers. The variations were divided into four groups. The first group showed that the terminal end of the AA divided into lateral and medial divisions in 6.16% (CI: 2.21-9.82) male and in 15.63% (CI: 2.76-25.25) female cadavers. The second group variation showed that the terminal end of the axillary artery divided into deep and superficial divisions in 2.74% (CI: 0.10-5.27) male and in 6.25% (CI: -1.87-13.13) female cadavers. The third group showed that the terminal end of the AA divided into three branches in 2.74% (CI: 0.10-5.27) male and in 6.25% (CI: -1.87-13.13) female cadavers. The fourth group showed the tapering of the terminal end of AA in 0.68% (CI: -0.63-1.99) male and 12.50% (CI: 0.97-21.46) female cadavers. The variable origin of the circumflex humeral, subscapular and profunda brachii arteries was also observed. These variations in the terminal end of the axillary artery are not only of significant clinical importance to orthopaedic and reconstructive surgeons but also have very significant medico-legal implications.
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Affiliation(s)
- S K Pandey
- Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi-221005, India.
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46
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Abstract
PURPOSE To report and compare clinical and pathological features of hydrophilic acrylic intraocular lenses (IOLs) of three major designs, explanted from patients who had visual disturbances caused by opacification of the lens optic. METHODS Eighty-seven hydrophilic acrylic IOLs (25 Hydroview, 54 SC60B-OUV, and 8 Aqua-Sense lenses) were explanted and sent to our center. Most patients became symptomatic during the second year after cataract surgery. A fine granularity was observed on the surface of the lens optic in the case of Hydroview. With the SC60B-OUV and Aqua-Sense lenses, the opacity resembled a nuclear cataract. Gross examination, light microscopy and staining with alizarin red and the von Kossa method (for calcium) were performed. Some lenses were submitted for scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). RESULTS Light microscopic and SEM analyses revealed the presence of irregular granular deposits on the external optical surfaces of Hydroview lenses. With the SC60B-OUV lenses, the opacity was caused by the presence of multiple fine, granular deposits within the lens optic, distributed in a line parallel to the anterior and posterior curvatures of the optic, with a clear zone just beneath its external surfaces. The Aqua-Sense lenses exhibited both patterns simultaneously. The deposits in all cases stained positive with alizarin red and von Kossa method. EDS also demonstrated the presence of calcium and phosphates within the deposits. CONCLUSION Differences in the water content of the hydrophilic acrylic materials used in the manufacture of these three lens designs may be responsible for the different patterns of calcium precipitation. Careful clinical follow up of patients implanted with these lenses is necessary to determine if this phenomenon is rare and sporadic or may be more widespread.
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Affiliation(s)
- A M Izak
- Center for Research on Ocular Therapeutics and Biodevices, Storm Eye Institute, Medical University of South Carolina, 167 Ashley Avenue, Charleston, SC 29425-5536, USA
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47
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Vargas LG, Werner L, Pandey SK, Werner LP, Schmidbauer JM, Zuleta V, Escobar-Gómez M, Apple DJ. [Techniques for preparing postmortem human eyes to perform anterior segment intraocular surgery]. Arch Soc Esp Oftalmol 2003; 78:73-89. [PMID: 12647248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
We describe different methods to prepare postmortem human or animal eyes used at the Center for Research in Ocular Therapeutics and Biodevices at the Storm Eye Institute, Medical University of South Carolina, Charleston, SC, USA. These techniques have been utilized for performing different surgical procedures (phacoemulsification, extracapsular cataract extraction, etc.), and for training of surgeons in-transition. Performing these techniques in the wet-laboratory contributed to improve surgical skills to perform the critical steps of the phacoemulsification surgery. Pathological evaluation of pseudophakic postmortem human eyes using the Miyake-Apple posterior view and histology was helpful to analyze postoperative complications of cataract surgery (anterior capsule opacification and posterior capsule opacification) secondary to postoperative proliferation of lens epithelial cells into the capsular bag. Modifications in the surgical techniques and/or lens design may be helpful to reduce these postoperative complications. Implantation of various aphakic and phakic intraocular lenses in postmortem human eyes as well as animal eyes was helpful to analyze the sizing and fitting of new lens designs within the eye.
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Affiliation(s)
- L G Vargas
- Center for Research on Ocular Therapeutics and Biodevices, Storm Eye Institute, Medical University of South Carolina, USA.
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48
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Wilson ME, Pandey SK, Thakur J. Paediatric cataract blindness in the developing world: surgical techniques and intraocular lenses in the new millennium. Br J Ophthalmol 2003; 87:14-9. [PMID: 12488254 PMCID: PMC1771478 DOI: 10.1136/bjo.87.1.14] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2002] [Indexed: 11/03/2022]
Abstract
Paediatric cataract blindness presents an enormous problem to developing countries in terms of human morbidity, economic loss, and social burden. Managing cataracts in children remains a challenge: treatment is often difficult, tedious, and requires a dedicated team effort. To assure the best long term outcome for cataract blind children, appropriate paediatric surgical techniques need to be defined and adopted by ophthalmic surgeons of developing countries. The high cost of operative equipment and the uneven world distribution of ophthalmologists, paediatricians, and anaesthetists create unique challenges. This review focuses on issues related to paediatric cataract management that are appropriate and suitable for ophthalmic surgeons in the developing world. Practical guidelines and recommendations have also been provided for ophthalmic surgeons and health planners dealing with childhood cataract management in the developing world.
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Affiliation(s)
- M E Wilson
- Miles Center for Pediatric Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina 29425-5536, USA.
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49
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Singh G, Kapoor IPS, Pandey SK, Singh UK, Singh RK. Studies on essential oils: part 10; antibacterial activity of volatile oils of some spices. Phytother Res 2002; 16:680-2. [PMID: 12410554 DOI: 10.1002/ptr.951] [Citation(s) in RCA: 174] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The essential oils extracted from the seeds of seven spices, Anethum graveolens, Carum capticum, Coriandrum sativum, Cuminum cyminum, Foeniculum vulgare, Pimpinella anisum and Seseli indicum have been studied for antibacterial activity against eight pathogenic bacteria, causing infections in the human body. It has been found that the oil of C. capticum is very effective against all tested bacteria. The oil of C. cyminum and A. graveolens also gave similar results. These oils are equally or more effective when compared with standard antibiotics, at a very low concentration.
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Affiliation(s)
- G Singh
- Chemistry Department, DDU Gorakhpur University, Gorakhpur - 273009, India.
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50
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Abstract
Intraocular lens (IOL) implantation has no doubt been one of the most satisfying advances of medicine. Millions of individuals with visual disability or frank blindness from cataracts had and continue to have benefit from this procedure. It has been reported by ophthalmologists that the modern cataract-intraocular lens (IOL) surgery is safe and complication-free most of the time. This makes the watchword for any cataract surgeon to be 'implantation,' 'implantation,' 'implantation.' In the mid-1980s, as IOLs were evolving rapidly, the watchword of the implant surgeon was 'fixation,' 'fixation,' 'fixation.' Most techniques, lenses and surgical adjuncts now allow us to achieve the basic requirement for successful IOL implantation, namely long-term stable IOL fixation in the capsular bag. However despite this advancement some items 'slipped through cracks.' In this article, we would like to alert the reader to a new watchword, namely 'opacification,' 'opacification,' 'opacification.' Here we will be talking about the good, the bad, and the ugly. Examples of the 'good' include the recent successes now being achieved in reducing the incidence of posterior capsule opacification. Examples of the 'bad' include various proliferations of anterior capsule cells, problems caused by silicone oil adherence to IOLs and problems with piggyback IOLs. The 'ugly' include the sometimes striking and often visually disabling opacifications occurring on and within IOL optics, both on some modern foldable IOLs as well as a poly(methyl methacrylate) (PMMA) optic degradation occurring with some models a decade or more after implantation.
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Affiliation(s)
- R H Trivedi
- Center for Research on Ocular Therapeutics and Biodevices, Storm Eye Institute, Medical University of South Carolina, Charleston, SC 29425-5536, USA
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