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Verma PK, Devaprasad M, Dave J, Meena R, Bhowmik H, Tripathi SN, Rastogi N. Summertime oxidative potential of atmospheric PM 2.5 over New Delhi: Effect of aerosol ageing. Sci Total Environ 2024; 920:170984. [PMID: 38365025 DOI: 10.1016/j.scitotenv.2024.170984] [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: 09/25/2023] [Revised: 02/12/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
Exposure to elevated particulate matter (PM) concentrations in ambient air has become a major health concern over urban areas worldwide. Reactive oxygen species (ROS) generation due to ambient PM (termed as their oxidative potential, OP) is shown to play a major role in PM-induced health effects. In the present study, the OP of the ambient PM2.5 samples, collected during summer 2019 from New Delhi, were measured using the dithiothreitol (DTT) assay. Average volume-normalized OP (OPV) was 2.9 ± 1.1 nmol DTT min-1 m-3, and mass-normalized OP (OPm) was 61 ± 29 pmol DTT min-1 μg-1. The regression statistics of OPv vs chemical species show the maximum slope of OPV with the elemental carbon (EC, r2 = 0.72) followed by water-soluble organic carbon (WSOC, r2 = 0.72), and organic carbon (OC, r2 = 0.64). A strong positive correlation between OPm and secondary inorganic aerosols (SIA, such as NH4+ and NO3- mass fractions) was also observed, indicating that the sources emitting NO2 and NH3, precursors of NO3- and NH4+, also emit DTT-active species. Interestingly, the slope value of OPv vs OC for aged aerosols (OM/OC > 1.7, f44 > 0.12 and f43 < 0.04) was 1.7 times higher than relatively fresh organic aerosols (OA, OM/OC < 1.7, f44 < 0.12, f43 > 0.04). An increase in OPv and OPoc with f44 indicates the formation of more DTT active species with the ageing of OA. A linear increase in OPoc with increasing Nitrogen/Carbon (N/C) ratio suggests that nitrogenous OA have higher OP.
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Affiliation(s)
- P K Verma
- Geosciences Division, Physical Research Laboratory, Ahmedabad, Gujarat 380009, India.
| | - M Devaprasad
- Geosciences Division, Physical Research Laboratory, Ahmedabad, Gujarat 380009, India; Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - J Dave
- Geosciences Division, Physical Research Laboratory, Ahmedabad, Gujarat 380009, India
| | - R Meena
- Geosciences Division, Physical Research Laboratory, Ahmedabad, Gujarat 380009, India
| | - H Bhowmik
- Department of Civil Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
| | - S N Tripathi
- Department of Civil Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
| | - N Rastogi
- Geosciences Division, Physical Research Laboratory, Ahmedabad, Gujarat 380009, India.
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Devaprasad M, Rastogi N, Satish R, Patel A, Dabhi A, Shivam A, Bhushan R, Meena R. Dual carbon isotope-based brown carbon aerosol characteristics at a high-altitude site in the northeastern Himalayas: Role of biomass burning. Sci Total Environ 2024; 912:169451. [PMID: 38143007 DOI: 10.1016/j.scitotenv.2023.169451] [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: 07/27/2023] [Revised: 11/10/2023] [Accepted: 12/15/2023] [Indexed: 12/26/2023]
Abstract
PM2.5 samples (n = 34) were collected from January to April 2017 over Shillong (25.7°N, 91.9°E; 1064 m amsl), a high-altitude site situated in the northeastern Himalaya. The main aim was to understand the sources, characteristics, and optical properties of local vs long-range transported carbonaceous aerosols (CA) using chemical species and dual carbon isotopes (13C and 14C). Percentage biomass burning (BB)/biogenic fraction (fbio, calculated from 14C) varied from 67 to 92 % (78 ± 7) and correlated well with primary BB tracers like f60, and K+, suggesting BB as a considerable source. Rain events are shown to reduce the fbio fraction, indicating majority of BB-derived CA are transported. Further, δ13C (-26.6 ± 0.4) variability was very low over Shillong, suggesting it's limitations in source apportionment over the study region, if used alone. Average ratio of absorption coefficient of methanol-soluble BrC (BrCMS) to water-soluble BrC (BrCWS) at 365 nm was 1.8, indicating a significant part of BrC was water-insoluble. A good positive correlation between fbio and mass absorption efficiency of BrCWS and BrCMS at 365 nm with the higher slope for BrCMS suggests BB derived water-insoluble BrC was more absorbing. Relative radiative forcing (RRF, 300 to 2500 nm) of BrCWS and BrCMS with respect to EC were 11 ± 5 % and 23 ± 16 %, respectively. Further, the RRF of BrCMS was up to 60 %, and that of BrCWS was up to 22 % with respect to EC for the samples with fbio ≥ 0.85 (i.e., dominated by BB), reflecting the importance of BB in BrC RRF estimation.
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Affiliation(s)
- M Devaprasad
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India; Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - N Rastogi
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India.
| | - R Satish
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - A Patel
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - A Dabhi
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - A Shivam
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - R Bhushan
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - R Meena
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
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Dake DV, Raskar ND, Mane VA, Sonpir RB, Stathatos E, Vasundhara M, Meena R, Asokan K, Dole BN. Intriguing physicochemical properties and impact of co-dopants on N-doped graphene oxide based ZnS nanowires for photocatalytic application. Sci Rep 2023; 13:7595. [PMID: 37164980 PMCID: PMC10172323 DOI: 10.1038/s41598-023-33453-z] [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] [Received: 01/11/2023] [Accepted: 04/13/2023] [Indexed: 05/12/2023] Open
Abstract
Superparamagnetic N-doped graphene oxide (GO)- with ZnS nanowires was synthesized by a one-step hydrothermal method by doping dilute amounts of Ga, Cr, In, and Al ions for water treatment and biomedical applications. In these experiments, to enhance their properties, 2% of Ga3+, In3+, and or Al3+ were codoped along with 2% Cr ions in these ZnS nanowires. The nanocomposite with the composition, In0.02Cr0.02Zn0.96S, has better photocatalytic efficiency than other co-doped nanocomposites. The In (metalloids) and Cr (transition metal ion) are the best combinations to increase the magnetic properties which are beneficial for photocatalytic activity. Synthesized nanocomposite materials were characterized by several techniques such as X-ray diffraction, Field emission-scanning electron microscope (FESEM) with EDAX, vibrating sample magnetometer (VSM), UV-Vis, X-ray photoelectron spectroscopy (XPS), and fluorescence spectroscopy. The correlation of intriguing magnetic properties with their photocatalytic properties is also discussed. XPS was employed for the detection of surface defects, phase transformation, and the nature of chemical components present in the nanocomposites. The Frankel and substitutional defects have a direct impact on photocatalytic activity that was determined from the fluorescence (FL) spectroscopy. FL and XPS reveal that the Cr and In codoped composite has a higher percentage of defects hence its photocatalytic efficiency reaches 94.21%.
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Affiliation(s)
- D V Dake
- Advanced Materials Research Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004, M.S., India
| | - N D Raskar
- Advanced Materials Research Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004, M.S., India
| | - V A Mane
- Advanced Materials Research Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004, M.S., India
| | - R B Sonpir
- Advanced Materials Research Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004, M.S., India
| | - E Stathatos
- Electrical and Computer Engineering Department, Nanotechnology and Advanced Materials Laboratory, University of the Peloponnese, 26334, Patras, Greece
| | - M Vasundhara
- Polymer and Functional Department, CSIR-Indian Institution of Chemical Technology, Tarnaka, Hyderabad, Telangana, 500007, India
| | - R Meena
- Materials Science, Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110 067, India
| | - K Asokan
- Department of Physics and Centre for Interdisciplinary Research, University of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand, 248007, India
| | - B N Dole
- Advanced Materials Research Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004, M.S., India.
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Devaprasad M, Rastogi N, Satish R, Patel A, Singh A, Dabhi A, Shivam A, Bhushan R, Meena R. Characterization of paddy-residue burning derived carbonaceous aerosols using dual carbon isotopes. Sci Total Environ 2023; 864:161044. [PMID: 36572314 DOI: 10.1016/j.scitotenv.2022.161044] [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: 08/29/2022] [Revised: 11/24/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
A large scale paddy-residue burning (PRB) happens every year in the northwest Indo-Gangetic Plain (IGP) during the post-monsoon season, and winds transport pollutants from the source region up to the northern Indian Ocean affecting air quality of the IGP and marine region. In this study, day-night pairs of fine aerosol samples (n = 69) were collected during October-November over Patiala (30.2°N, 76.3°E, 250 m amsl), a site located in the source region of PRB. Carbonaceous aerosols (CA) were characterised using chemical species and dual carbon isotopes (13C and 14C) to estimate bio vs non-bio contributions and understand their characteristics. Percentage of bio fraction (fbio, estimated using 14C) in CA varied from 74 % to 87 % (avg: 80 ± 3) during days and 71 % to 96 % (avg: 85 ± 7 %) during nights. Further, the fbio was found to be better correlated with aerosol mass spectrometer derived f60 compare to levoglucosan (LG) or nssK+, suggesting f60 a useful proxy for PRB. The δ13C varied from -27.7 ‰ to -26.0 ‰ (avg: -27.0 ± 0.4 ‰) and - 28.7 ‰ to -26.4 ‰ (avg: -27.5 ± 0.7 ‰) during day and night, respectively. Measured δ13C of the samples was found to be more enriched than expected by 0.3 to 2.0 ‰, indicating the presence of aged CA also in Patiala even during PRB period. From fbio versus δ13C correlation, and from Miller-Trans plot, δ13C of PRB is found to be -28.9 ± 1.1 ‰, which also infers that Miller-Trans plot can be used to understand source isotopic signature in the absence of radiocarbon measurements in aerosols. Further, the characteristics ratios of organic carbon (OC) to elemental carbon (EC) (11.9 ± 4.1), LG to potassium (K+) (0.84 ± 0.15), OC/LG (19.7 ± 2.0) and K+/EC (0.75 ± 0.27) were calculated by considering samples with fbio higher than 0.90, which can be used for source apportionment studies. Such studies are crucial in assessing the effects of PRB on regional air quality and climate.
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Affiliation(s)
- M Devaprasad
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India; Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - N Rastogi
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India.
| | - R Satish
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - A Patel
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - A Singh
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India; Department of Physics, Punjabi University, Patiala 147002, India
| | - A Dabhi
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - A Shivam
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - R Bhushan
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
| | - R Meena
- Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India
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Elanthendral G, Shobana N, Meena R, P P, Samrot AV. Utilizing pharmacological properties of polyphenolic curcumin in nanotechnology. Biocatalysis and Agricultural Biotechnology 2021. [DOI: 10.1016/j.bcab.2021.102212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Meena R, Natarajan S, Anbarasi C, Sathiyarajeswaran P. Siddha Varmam and Thokkanam therapy in the treatment of adhesive capsulitis-A case report. J Ayurveda Integr Med 2021; 12:373-377. [PMID: 34020868 PMCID: PMC8185989 DOI: 10.1016/j.jaim.2021.03.003] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 03/01/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022] Open
Abstract
A 60 year married female from Chennai presented with pain and restricted abduction, adduction, external rotation and flexion of right shoulder both in active and passive movements for 2 months. She was diagnosed to be affected by adhesive capsulitis which is equated to Kumbavatham, one of the vatha diseases mentioned in Siddha system of medicine. She was treated with Siddha Varmam therapy and thokkanam with Vathakesari thylam. After 15 days of hospital stay the patient was discharged and was followed for 6 months. There were no adverse reactions/events observed during the course of treatment. The combination therapy has provided the reduction in pain and restricted movements which was measured using goniometer and SPADI index.
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Affiliation(s)
- R Meena
- Varmam Thokkanam and Traditional Bone Setting Division, Siddha Central Research Institute, Chennai, Tamilnadu, India.
| | - S Natarajan
- Varmam Thokkanam and Traditional Bone Setting Division, Siddha Central Research Institute, Chennai, Tamilnadu, India
| | - C Anbarasi
- Varmam Thokkanam and Traditional Bone Setting Division, Siddha Central Research Institute, Chennai, Tamilnadu, India
| | - P Sathiyarajeswaran
- Siddha Central Research Institute, Central Council for Research in Siddha, Chennai, Tamilnadu, India
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Agrawal D, Chandra PS, Singh PK, Meena R, Doddamani R, Jagdevan A, Mishra S, Garg K. Cost-Effective Home Mechanical Ventilation in Neurosurgery Patients: Case Series of Three Patients. J Neurosci Rural Pract 2020; 11:329-332. [PMID: 32367989 PMCID: PMC7195951 DOI: 10.1055/s-0040-1709256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background
Neurological patients who are ventilator-dependent occupy scarce beds in the hospitals for prolonged periods of time. Most, if not all, can be discharged on home mechanical ventilation (HMV). However, due to lack of insurance and state support, it remains prohibitively expensive for the vast majority of those who require it most.
Materials and Methods
The authors discuss three patients admitted in the Department of Neurosurgery between January and August 2019, who were discharged on HMV after remaining on ventilator support for prolonged period in the hospital. Each patient was discharged with two units (one as standby) of AgVa home ventilator (AgVa Healthcare; New Delhi, India), one Ambu-bag, one pulse oximeter, and one backup power supply unit capable of supplying power to ventilator for a minimum of 24 hours. All the equipment were given free-of-cost through donations by hospital staffs and other donors. All patients were followed up telephonically from their homes and the incidence of complications, ventilator malfunction, and additional cost of HMV on the families were ascertained.
Observation and Results
Of the three patients, two were male and one female. Age ranged from 12 to 17 years. The duration of in-hospital ventilator support prior to discharge on HMV varied from 1 to 5 years. There was no insurance cover available for any of the patients with all expenses being “out of pocket.” The equipment cost Indian Rupees (INR) 115,700 (USD 1,615: two units of AgVa home ventilator costing INR 100,000 [USD 1,396], one Ambu-bag costing INR 1,100 [USD 15], one pulse oximeter costing INR 1,600 [USD 22], and one backup power supply unit costing INR 13,000 [USD 182]). Discharge on HMV was planned on specific request from patients’ families and informed consent was taken from all. All patients had tracheostomies. Mode of HMV was pressure support ventilation in all. Telephonic follow-up ranged from 1 to 7 months. The cost of disposables was INR 100 per month (USD 0.7) for all the patients. No complications occurred in any patient. There was no incidence of ventilator-associated pneumonia (VAP) or ventilator malfunction.
Conclusions
Availability of cost-effective indigenous ventilator like AgVa home has made HMV possible, even for poor patients with neurological diseases, and has the potential to improve quality of life, decrease VAP rates, and free up scarce ventilator beds in hospitals. Longer-term follow-up in larger number of patients will improve the data on safety and feasibility in developing countries like India.
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Affiliation(s)
- Deepak Agrawal
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - P S Chandra
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - P K Singh
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - R Meena
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - R Doddamani
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - A Jagdevan
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - S Mishra
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
| | - K Garg
- Department of Neurosurgery & Gamma-Knife, All India Institute of Medical Sciences, New Delhi, India
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Sukanya A, Meena R, Ravindran AD. Cultivation of Spirulina using Low-Cost Organic Medium and Preparation of Phycocyanin Based Ice Creams. ACTA ACUST UNITED AC 2020. [DOI: 10.20546/ijcmas.2020.902.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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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9
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Singh R, Dwivedi SP, Gaharwar US, Meena R, Rajamani P, Prasad T. Recent updates on drug resistance in Mycobacterium tuberculosis. J Appl Microbiol 2019; 128:1547-1567. [PMID: 31595643 DOI: 10.1111/jam.14478] [Citation(s) in RCA: 142] [Impact Index Per Article: 28.4] [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: 06/07/2019] [Revised: 09/09/2019] [Accepted: 09/13/2019] [Indexed: 12/18/2022]
Abstract
Tuberculosis (TB) along with acquired immune deficiency syndrome and malaria rank among the top three fatal infectious diseases which pose threat to global public health, especially in middle and low income countries. TB caused by Mycobacterium tuberculosis (Mtb) is an airborne infectious disease and one-third of the world's population gets infected with TB leading to nearly 1·6 million deaths annually. TB drugs are administered in different combinations of four first-line drugs (rifampicin, isoniazid, pyrazinamide and ethambutol) which form the core of treatment regimens in the initial treatment phase of 6-9 months. Several reasons account for the failure of TB therapy such as (i) late diagnosis, (ii) lack of timely and proper administration of effective drugs, (iii) lower availability of less toxic, inexpensive and effective drugs, (iv) long treatment duration, (v) nonadherence to drug regimen and (vi) evolution of drug-resistant TB strains. Drug-resistant TB poses a significant challenge to TB therapy and control programs. In the background of worldwide emergence of 558 000 new TB cases with resistance to rifampicin in the year 2017 and of them, 82% becoming multidrug-resistant TB (MDR-TB), it is essential to continuously update the knowledge on the mechanisms and molecular basis for evolution of Mtb drug resistance. This narrative and traditional review summarizes the progress on the anti-tubercular agents, their mode of action and drug resistance mechanisms in Mtb. The aim of this review is to provide recent updates on drug resistance mechanisms, newly developed/repurposed anti-TB agents in pipeline and international recommendations to manage MDR-TB. It is based on recent literature and WHO guidelines and aims to facilitate better understanding of drug resistance for effective TB therapy and clinical management.
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Affiliation(s)
- R Singh
- AIRF & Special Centre for Nano Sciences, Jawaharlal Nehru University, New Delhi, India
| | - S P Dwivedi
- IFTM University, Moradabad, Uttar Pradesh, India
| | - U S Gaharwar
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - R Meena
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - P Rajamani
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - T Prasad
- AIRF & Special Centre for Nano Sciences, Jawaharlal Nehru University, New Delhi, India
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Natarajan S, Anbarasi C, Meena R, Muralidass SD, Sathiyarajeswaran P, Gopakumar K, Ramaswamy RS. Treatment of acute avulsion of posterior cruciate ligament of left knee with bony fragment by Siddha Varmam therapy and traditional bone setting method. J Ayurveda Integr Med 2019; 10:135-138. [PMID: 30635248 PMCID: PMC6598807 DOI: 10.1016/j.jaim.2018.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 05/15/2018] [Accepted: 05/24/2018] [Indexed: 11/17/2022] Open
Abstract
A 42-year-old man with the complaints of left knee swelling, severe pain, difficult to stand was reported to Siddha Varmam division after a road accident. He was diagnosed as acute avulsion of Posterior cruciate ligament (PCL). It was diagnosed based on the history of trauma, knee pain and swelling after trauma, positive posterior drawer test and avulsion fracture shown by radiograph. He was treated with Siddha Varmam therapy and traditional bone setting. After a month of treatment, the PCL avulsion fracture got healed without any surgical interventions and patient able to walk normally. This case report summarises the novel Siddha Varmam therapy and traditional bone setting treatments for acute avulsion of PCL with bony fragment.
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Affiliation(s)
- S Natarajan
- Varmam, Thokkanam and Traditional Bone Setting Division, Department of Clinical Research, Siddha Central Research Institute, Chennai, India.
| | - C Anbarasi
- Varmam, Thokkanam and Traditional Bone Setting Division, Department of Clinical Research, Siddha Central Research Institute, Chennai, India
| | - R Meena
- Varmam, Thokkanam and Traditional Bone Setting Division, Department of Clinical Research, Siddha Central Research Institute, Chennai, India
| | | | | | - K Gopakumar
- Santhigiri Siddha Hospital, Pattom, Kerala, India
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11
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Singh EN, Kumar S, Agarwal US, Meena R, Purohit S. Acquired reactive perforating collagenosis associated with mediastinal synovial sarcoma. Clin Exp Dermatol 2018; 44:325-327. [DOI: 10.1111/ced.13684] [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] [Subscribe] [Scholar Register] [Accepted: 02/08/2018] [Indexed: 12/19/2022]
Affiliation(s)
- E. N. Singh
- Department of Dermatology, Venereology and Leprology; S. M. S. Medical College and Attached Hospitals; Jaipur India
| | - S. Kumar
- Department of Dermatology, Venereology and Leprology; S. M. S. Medical College and Attached Hospitals; Jaipur India
| | - U. S. Agarwal
- Department of Dermatology, Venereology and Leprology; S. M. S. Medical College and Attached Hospitals; Jaipur India
| | - R. Meena
- Department of Dermatology, Venereology and Leprology; S. M. S. Medical College and Attached Hospitals; Jaipur India
| | - S. Purohit
- Department of Dermatology, Venereology and Leprology; S. M. S. Medical College and Attached Hospitals; Jaipur India
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12
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Mahto A, Gupta R, Ghara KK, Srivastava DN, Maiti P, D K, Rivera PZ, Meena R, Nataraj SK. Development of high-performance supercapacitor electrode derived from sugar industry spent wash waste. J Hazard Mater 2017; 340:189-201. [PMID: 28715742 DOI: 10.1016/j.jhazmat.2017.06.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 03/29/2017] [Revised: 06/05/2017] [Accepted: 06/20/2017] [Indexed: 05/03/2023]
Abstract
This study aims at developing supercapacitor materials from sugar and distillery industry wastes, thereby mediating waste disposal problem through reuse. In a two-step process, biomethanated spent wash (BMSW) was acid treated to produce solid waste sludge and waste water with significantly reduced total organic carbon (TOC) and biological oxygen demand (BOD) content. Further, waste sludge was directly calcined in presence of activating agent ZnCl2 in inert atmosphere resulting in high surface area (730-900m2g-1) carbon of unique hexagonal morphology. Present technique resulted in achieving two-faceted target of liquid-solid waste remediation and production of high-performance carbon material. The resulted high surface area carbon was tested in both three and two electrode systems. Electrochemical tests viz. cyclic voltammetry, galvanostatic charge-discharge and impedance measurement were carried out in aqueous KOH electrolyte yielding specific capacitance as high as 120Fg-1, whereas all solid supercapacitor devised using PVA/H3PO4 polyelectrolyte showed stable capacitance of 105Fg-1 at 0.2Ag-1. The presence of transition metal particles and hetero-atoms on carbon surface were confirmed by XPS, EDX and TEM analysis which enhanced the conductivity and imparted pseudocapacitance to some extent into the working electrode. The present study successfully demonstrated production of high-performance electrode material from dirtiest wastewater making process green, sustainable and economically viable.
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Affiliation(s)
- Ashesh Mahto
- Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Kanakapura, Ramanagaram, Bangalore 562112, India; AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar 364002, India
| | - Rajeev Gupta
- CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, India; AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar 364002, India
| | - Krishna Kanta Ghara
- CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, India; AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar 364002, India
| | - Divesh N Srivastava
- CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, India; AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar 364002, India
| | - Pratyush Maiti
- CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, India
| | - Kalpana D
- CSIR-Central Electrochemical Research Institute -Madras Unit, Taramani, Chennai 600 113, Tamilnadu, India
| | - Paul-Zavala Rivera
- Chemical Engineering & Metallurgy Department, Universidad de Sonora, Mexico
| | - R Meena
- CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, India; AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar 364002, India.
| | - S K Nataraj
- Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Kanakapura, Ramanagaram, Bangalore 562112, India.
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Sharma S, Meena R, Satyawana Y, Fahmi N. Manganese(II) complexes of biological relevance: Synthesis and spectroscopic characterization of novel manganese(II) complexes with monobasic bidentate ligands derived from halo-substituted 1H-indole-2,3-diones. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363216120446] [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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14
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Rai M, Shahi G, Meena V, Meena R, Chakraborty S, Singh R, Rai B. Removal of hexavalent chromium Cr (VI) using activated carbon prepared from mango kernel activated with H3PO4. Resource-Efficient Technologies 2016. [DOI: 10.1016/j.reffit.2016.11.011] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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15
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Meena R, Supriya C, Pratap Reddy K, Sreenivasula Reddy P. Altered spermatogenesis, steroidogenesis and suppressed fertility in adult male rats exposed to genistein, a non-steroidal phytoestrogen during embryonic development. Food Chem Toxicol 2016; 99:70-77. [PMID: 27884790 DOI: 10.1016/j.fct.2016.11.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 08/05/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 10/20/2022]
Abstract
This article focuses on the effects of prenatal exposure to genistein on the mother, her pregnancy and reproductive functions of the male progeny, since these issues have ethological relevance in both animals and humans. Pregnant Wistar rats received i.p. injections of genistein at a dose level of 2, 20 or 100 mg/kg body weight daily from 12th to 19th day of gestation. Male pups from control and genistein exposed animals were weaned and allowed to develop until 100 days of age; however, when they were 90 days old, twelve males from each group were cohabited with untreated 90-day old females for 8 days. Results revealed a significant decrease in indices of reproductive organs in adult male rats exposed to genistein during embryonic development. Dose dependent reduction was observed in daily sperm production and epididymal sperm density and quality in genistein treated rats. Significant decrease was observed in the activity levels of 3β- and 17β-hydroxysteroid dehydrogenases in testis of experimental rats with a decline in plasma testosterone levels. Histological examination of testis of genistein treated rats indicated deterioration in testicular architecture. In the fertility study, the mean number of implantations and live fetuses per dam mated with 100 mg genistein exposed males was reduced.
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Affiliation(s)
- R Meena
- Department of Biotechnology, Sri Venkateswara University, Tirupati 517502, India
| | - Ch Supriya
- Department of Biotechnology, Sri Venkateswara University, Tirupati 517502, India
| | - K Pratap Reddy
- Department of Biotechnology, Sri Venkateswara University, Tirupati 517502, India
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Thangasamy Bharathi M, Jain S, Badgujar M, Meena R. RM-045 Pre-operative diagnosis in pancreatic tumors-reality or myth? Ann Oncol 2016. [DOI: 10.1093/annonc/mdw201.42] [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: 11/12/2022] Open
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17
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Thangasamy Bharathi M, Jain S, Meena R, Badgujar M. P-197 Surgical Emergencies in Colorectal Malignancies-Patient Profile Analysis. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.189] [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: 11/13/2022] Open
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18
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Thangasamy Bharathi M, Meena R, Jain S. RM-008 Intraoperative sentinel lymph node positivity by methylene blue dye and its association with other dissected lymph node by histopathological examination in colorectal cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw201.08] [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: 11/13/2022] Open
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19
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Arya A, Meena R, Sethy NK, Das M, Sharma M, Bhargava K. NAP (davunetide) protects primary hippocampus culture by modulating expression profile of antioxidant genes during limiting oxygen conditions. Free Radic Res 2015; 49:440-52. [DOI: 10.3109/10715762.2015.1011153] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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20
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Meena R, Dhakal Y, Bohra J, Singh S, Singh M, Sanodiya P, Meena H. Influence of Bioinorganic Combinations on Yield, Quality and Economics of Mung Bean. ACTA ACUST UNITED AC 2015. [DOI: 10.9734/ajea/2015/17065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Meena R, Yadav R, Reager M, De N, Meena V, Verma J, Verma S, Kansotia B. Temperature Use Efficiency and Yield of Groundnut Varieties in Response to Sowing Dates and Fertility Levels in Western Dry Zone of India. ACTA ACUST UNITED AC 2015. [DOI: 10.9734/ajea/2015/13689] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Mondal D, Sharma M, Maiti P, Prasad K, Meena R, Siddhanta AK, Bhatt P, Ijardar S, Mohandas VP, Ghosh A, Eswaran K, Shah BG, Ghosh PK. Fuel intermediates, agricultural nutrients and pure water from Kappaphycus alvarezii seaweed. RSC Adv 2013. [DOI: 10.1039/c3ra42919a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Reddy PS, Rani GP, Sainath SB, Meena R, Supriya C. Protective effects of N-acetylcysteine against arsenic-induced oxidative stress and reprotoxicity in male mice. J Trace Elem Med Biol 2011; 25:247-53. [PMID: 21924885 DOI: 10.1016/j.jtemb.2011.08.145] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [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] [Received: 11/17/2010] [Revised: 06/22/2011] [Accepted: 08/22/2011] [Indexed: 12/20/2022]
Abstract
Arsenic is a well-known environmental toxic metalloid element and carcinogen that affects multiple organ systems including tissue lipid peroxidation and reproduction. The present study was aimed to investigate the protective role of N-acetylcysteine (NAC) on arsenic-induced testicular oxidative damage and antioxidant and steroidogeneic enzymes and sperm parameters in mice. Arsenic was administered through drinking water to mice at a concentration of 4.0 ppm sodium arsenite (actual concentration 2.3 ppm arsenic) for 35 days. The body weight of treated mice did not show significant change as compared with the control mice. In arsenic exposed mice there was a significant decrease in the weight of the testis, epididymis and prostate gland as compared with the control animals. Significant reduction was observed in epididymal sperm count, motile sperms and viable sperms in mice exposed to arsenic indicate decreased spermatogenesis and poor sperm quality. The activity levels of testicular 3β- and 17β-hydroxysteroid dehydrogenases and circulatory levels of testosterone were also decreased in arsenic treated mice indicating reduced steroidogenesis. A significant increase in the activities of lipid peroxidation and a significant decrease in the activities of antioxidant enzymes were observed in the testis of mice exposed to arsenic. In addition, significant increase in the testicular arsenic levels was observed during arsenic intoxication. No significant changes in the oxidation status and selected reproductive variables were observed in the N-acetylcysteine alone treated mice. Whereas, intra-peritoneal injection of NAC to arsenic exposed mice showed a significant increase in the weights of reproductive organs, reduction in arsenic-induced oxidative stress in the tissues and improvement in steroidogenesis over arsenic-exposed mice indicating the beneficial role of N-acetylcysteine to counteract arsenic-induced oxidative stress and to restore the suppressed reproduction in male mice.
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Sainath SB, Meena R, Supriya C, Reddy KP, Reddy PS. Protective role of Centella asiatica on lead-induced oxidative stress and suppressed reproductive health in male rats. Environ Toxicol Pharmacol 2011; 32:146-154. [PMID: 21843793 DOI: 10.1016/j.etap.2011.04.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 04/14/2011] [Accepted: 04/26/2011] [Indexed: 05/31/2023]
Abstract
Centella asiatica has been mentioned in ancient ayurvedic text of the Indian system of medicine for its properties to promote intelligence. The objective of the present study was to investigate the beneficial effects of C. asiatica on lead-induced oxidative stress and suppressed reproductive performance in male rats. Significant decrease in the weights of testes and epididymis were observed in lead treated animals. Exposure to lead acetate significantly increased malondialdehyde levels with a significant decrease in the superoxide dismutase and catalase activities in the liver, brain, kidneys and testes of rats. Epididymal sperm count, viable sperms, motile sperms and HOS-tail coiled sperms decreased significantly in lead-exposed rats. Testicular steroidogenic enzyme activities also decreased significantly in lead-exposed rats. No significant changes in the selected reproductive variables were observed in the plant extract alone treated rats. Whereas, co-administration of aqueous extracts of C. asiatica to lead exposed rats showed a significant increase in the weights of reproductive organs, reduction in lead-induced oxidative stress in the tissues and improvement in selected reproductive parameters over lead-exposed rats indicating the beneficial role of C. asiatica to counteract lead-induced oxidative stress and to restore the suppressed reproduction in male rats.
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Affiliation(s)
- S B Sainath
- Department of Biotechnology, S.V. University, Tirupati 517 502, India
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Singh N, Kumar L, Meena R, Velpandian T. Drug monitoring of imatinib levels in patients undergoing therapy for chronic myeloid leukaemia: comparing plasma levels of responders and non-responders. Eur J Clin Pharmacol 2009; 65:545-9. [PMID: 19214491 DOI: 10.1007/s00228-009-0621-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2008] [Accepted: 01/15/2009] [Indexed: 11/28/2022]
Abstract
PURPOSE Imatinib mesylate is used as first line therapy in the treatment of chronic myeloid leukaemia. This study was designed to study the correlation of plasma levels of imatinib with response to the therapy. METHODS A total of 40 chronic myeloid leukaemia patients in the chronic phase of the disease were recruited and placed into two groups of 20 patients: imatinib responders and imatinib non-responders, respectively. Each blood sample was taken 24 h after and immediately prior to taking a 400 mg oral dose of imatinib. Drug levels were detected by high-performance liquid chromatography. RESULTS The mean plasma imatinib levels in the imatinib non-responders were significantly lower than those in the imatinib responders (0.70 vs. 2.34 microM, respectively; p = 0.002). CONCLUSIONS Plasma levels of imatinib were correlated with response to the therapy, so routine monitoring of the therapeutic levels of the drug should be carried out specifically in treatment-resistant cases for determining dose escalation.
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Affiliation(s)
- N Singh
- Department of Medical Oncology, Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi 110029, India
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Alagarsamy V, Solomon VR, Meena R, Ramaseshu KV, Thirumurugan K, Murugesan S. Design and synthesis of 2-methylthio-3-substituted-5,6-dimethylthieno [2,3-d] pyrimidin-4(3H)-ones as analgesic, anti-inflammatory and antibacterial agents. Med Chem 2007; 3:67-73. [PMID: 17266626 DOI: 10.2174/157340607779317599] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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: 11/22/2022]
Abstract
Pain and inflammation are simultaneous responses in bacterial infections. In current clinical practice, two groups of agents like antibacterial and non-steroidal anti-inflammatory drugs (NSAID's) are prescribed simultaneously. Regrettably, none of the drug possesses these activities in a single component. Exploiting the bioisosterism concept, we have documented that 2-phenyl-3-substituted quinazolines, 2,3-disubstituted quinazolines, 2-methyl-3-substituted quinazolin-4-(3H)-ones and 2-methylthio-3-substituted quinazolin-4-(3H)-ones exhibited good analgesic and anti-inflammatory activities. The present work is an extension of our ongoing efforts towards the development and identification of lead molecules by bioisostere concept, for which we designed some of 2-methylthio-3-substituted-5,6-dimethylthieno[2,3-d] pyrimidin-4(3H)-ones. The title compounds were investigated for analgesic, anti-inflammatory and antibacterial activities. While the test compounds exhibited significant activity, the compounds (6-9) showed more potent analgesic activity, and the compounds (8, 9) showed anti-inflammatory activity comparable to the reference standard diclofenac.
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Affiliation(s)
- V Alagarsamy
- Medicinal Chemistry Research Laboratory, Arulmigu Kalasalingam College of Pharmacy, Krishnan kovil-626 190, India.
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Gupta S, Meena R, Agarwal A. Post dural puncture headache--a review article. Middle East J Anaesthesiol 1998; 14:267-74. [PMID: 9557914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- S Gupta
- Department of Anesthesiology & Resuscitation, R.N.T. Medical College and Hospitals, Rajasthan, India
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Abstract
One should be aware that the measurement of hearing is really an evaluation of a child's behavioural responses in a controlled setting to the presentation of various acoustic stimuli. The determination of hearing loss in some children is an ongoing process and may require more than one test session. Difficult to test children should be evaluated with as many techniques as possible for accurate cross checking of test results. Flexibility, patience and understanding and persistence are the watch words of successful hearing testing with children. For the bulk of patients who require audiological assessment however, the test battery (BOA, IMPEDANCE & BSER) approach seems to be the best available present day approach coupled with long term follow ups and careful management.
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Affiliation(s)
- R Meena
- Department of Otorhinolaryngology, Postgraduate Institute of Medical Education and Research, Chandigarh
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Meena R. Women and sustainable development. South Afr Polit Econ Mon 1992; 5:38-41. [PMID: 12285818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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30
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Bhasin MK, Walter H, Singh IP, Meena R. Geographic and ethnic distribution of genetic markers in India. 1. Haptoglobin and transferrin polymorphisms. Anthropol Anz 1981; 39:36-60. [PMID: 7027909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In the literature widely scattered Indian data on the gene frequencies of two polymorphic serum protein systems--haptoglobin (Hp) and transferrin (Tf)--have been compiled. In addition, the results of Hp and Tf typings on 111 individuals belonging to the caste groups of Brahmans (32), Rajputs (66), and Scheduled Caste (13) of Kausani of the Almora District, Uttar Pradesh (India) are presented.
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