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Khan SR, Roy AS, Hoque MR, Das SK, Hossain MB, Miah MOF, Nira NH, Salahuddin AZM, Islam H, Datta P. Assessment of Dialysis Adequacy Using Small Solute Clearance Indices among Twice versus Thrice Weekly Maintenance Hemodialysis Patients in a Tertiary Care Hospital of Bangladesh. Mymensingh Med J 2024; 33:80-90. [PMID: 38163777] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
This observational study was carried out in the Department of Nephrology, Mymensingh Medical College Hospital, Bangladesh from January 2020 to December 2020. A total of 179 patients were included in this study according to inclusion and exclusion criteria. Informed written consent was taken from each patient. All patients were underwent detail history taking, thorough physical examination and relevant investigations. Data collection was conducted through a structured questionnaire. Collected data were analyzed using the statistical software SPSS 23.0. Mean age ±SD of the study patients was 47.06±14.1 with a majority in age group 41-50 years. Male predominance was observed with a male: female ratio of 2.19:1 and 68.7% male patients. Level of pre-dialysis, post-dialysis urea in the study population was 123.77±26.86mg/dl, 50.27±15.70mg/dl respectively and mean ±SD of Urea Reduction Ratio (URR) in hemodialysis (target >65.0%) was 67.2±1.9. Most of the 8 hours (two times) per week hemolysis patients could not achieve the target value of dialysis adequacy parameters. On the other hand, maximum people in 12 hours (three times) per week hemodialysis group achieved the target value of dialysis adequacy parameters. It is important to calculate Kt/V or URR and individualize the dialysis doses for each patient.
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Affiliation(s)
- S R Khan
- Dr Suhel Rana Khan, Dialysis Medical Officer, Department of Nephrology, Mymensingh Medical College Hospital, Mymensingh, Bangladesh; E-mail:
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Mulkapuri S, Siddikha A, Ravi A, Saha P, Kumar AV, Boodida S, Vithal M, Das SK. Electrocatalytic Hydrogen Evolution by a Uranium(VI) Polyoxometalate: an Environmental Toxin for Sustainable Energy Generation. Inorg Chem 2023; 62:19664-19676. [PMID: 37967464 DOI: 10.1021/acs.inorgchem.3c03018] [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: 11/17/2023]
Abstract
The uranyl ion (UO2)2+, a uranium nuclear waste, is one of the serious contaminants in our ecosystem because of its radioactivity, relevant human activities, and highly mobile and complex nature of living cells. In this article, we have reported the synthesis and structural characterization of an uranyl cation-incorporated polyoxometalate (POM) compound, K10[{K4(H2O)6}{UO2}2(α-PW9O34)2]·13H2O (1), in which the uranyl cations are complexed with an in situ generated [α-PW9O34]9- cluster. Single-crystal X-ray diffraction (SCXRD) analysis of compound 1 reveals that the uranyl-potassium complex cationic species, [{K4(H2O)6}{UO2}2]8+, is sandwiched by two [α-PW9O34]9- clusters resulting in a Dawson type of POM. Compound 1 was further characterized by inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis and infrared (IR), Raman, electronic absorption, and solid-state photoluminescence spectral studies. IR stretching vibrations at 895 and 856 cm-1 and the Raman signature peak at 792 cm-1 in the IR and Raman spectra of compound 1 primarily confirm the presence of a trans-[O═U═O]2+ ion. The solid-state photoluminescence spectrum of 1 exhibits a typical vibronic structure, resulting from symmetrical vibrations of [O═U═O]2+ bands, corresponding to the electronic transitions of S11 → S10 and S10 → S0υ (υ = 0-3). Interestingly, title compound 1 shows efficient electrocatalytic hydrogen evolution by water reduction with low Tafel slope values of 186.59 and 114.83 mV dec-1 at 1 mA cm-2 along with optimal Faradaic efficiency values of 82 and 87% at neutral pH and in acidic pH 3, respectively. Detailed electrochemical analyses reveal that the catalytic hydrogen evolution reaction (HER) activity mediated by compound 1 is associated with the UVI/UV redox couple of the POM. The microscopic as well as routine spectral analyses of postelectrode samples and controlled experiments have confirmed that compound 1 behaves like a true molecular electrocatalyst for the HER. To our knowledge, this is the first paradigm of a uranium-containing polyoxometalate that exhibits electrocatalytic water reduction to molecular H2. In a nutshell, an environmental toxin (a uranium-oxo compound) has been demonstrated to be utilized as an efficient electrocatalyst for hydrogen generation from water, a green approach of sustainable energy production.
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Affiliation(s)
- Sateesh Mulkapuri
- School of Chemistry, University of Hyderabad, P. O. Central University, Hyderabad 500046, India
| | - Asha Siddikha
- School of Chemistry, University of Hyderabad, P. O. Central University, Hyderabad 500046, India
- Department of Chemistry, JNTUH University College of Engineering, Science and Technology, Hyderabad 500085, India
- Department of Chemistry, Osmania University, Hyderabad 500 007, India
| | - Athira Ravi
- School of Chemistry, University of Hyderabad, P. O. Central University, Hyderabad 500046, India
| | - Pinki Saha
- School of Chemistry, University of Hyderabad, P. O. Central University, Hyderabad 500046, India
| | - Avulu Vinod Kumar
- School of Chemistry, University of Hyderabad, P. O. Central University, Hyderabad 500046, India
| | - Sathyanarayana Boodida
- Department of Chemistry, JNTUH University College of Engineering, Science and Technology, Hyderabad 500085, India
| | - Muga Vithal
- Department of Chemistry, Osmania University, Hyderabad 500 007, India
| | - Samar K Das
- School of Chemistry, University of Hyderabad, P. O. Central University, Hyderabad 500046, India
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Fried DV, Ahmidouch M, Shen C, Das SK, Marks LB, Chera BS. Identifying a Dose Constraint for the Parotid Ducts: Impact on Patient Reported Xerostomia and Comparison to Conventional Parotid Gland Mean Dose Sparing. Int J Radiat Oncol Biol Phys 2023; 117:S100. [PMID: 37784267 DOI: 10.1016/j.ijrobp.2023.06.053] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) (1) Identify a dose constraint for the parotid ducts to reduce patient reported xerostomia and compare effectiveness to QUANTEC constraint. (2) Determine if conventionally planned patients meet this constraint by using atlas-based duct segmentation. MATERIALS/METHODS (1) 38 patients with oropharyngeal squamous cell carcinoma (OPSCC) were treated prospectively on trial with MRI sialography guided parotid duct sparing radiation therapy (parotid duct sparing cohort). These patients were compared to a historical cohort of 89 similar patients treated with conventional parotid gland mean dose sparing for salivary gland dosimetry and patient reported xerostomia (PRO-CTCAE ≥ Moderate). (2) A contour atlas comprised of 24 patients with MRI sialograms was created. Atlas-based segmentation was generated on the remaining 14 patients with MRI sialograms to assess for contour accuracy. Atlas-based parotid duct contours were generated on 111 patients treated with conventional parotid gland mean dose sparing to facilitate a dosimetric comparison to the parotid duct sparing cohort. RESULTS (1) In the parotid duct sparing cohort, patients whose parotid ducts (bilateral) were planned for a mean dose <14 Gy reported significantly (p<0.01) lower rates of xerostomia compared to patients whose ducts were planned to receive >14 Gy (26% (5/19) versus 86% (12/14) at 6 months post-RT and 22% (4/18) versus 73% (8/11) at 12 months post-RT). This improvement compares favorably to the QUANTEC constraint of bilateral parotid glands < 25 Gy (see Table). (2) The atlas-based duct contours were found to have a mean distance-to-agreement of 5mm and an average absolute dose difference of 4.5 Gy compared to the MRI sialography defined duct contours. The average duct dose for those undergoing MRI sialography guided duct sparing was found to be 13.5 Gy compared to an estimated (via atlas-based segmentation) 22.3 Gy for those receiving conventional parotid gland mean dose sparing (p < 0.01). 20% (22/111) patients receiving conventional parotid gland mean dose sparing met the 14 Gy parotid duct constraint versus 60% of patients undergoing MRI sialography guided parotid duct sparing. CONCLUSION Parotid duct sparing (parotid duct dose <14 Gy) was both more effective (∼50% [76% to 26%] absolute xerostomia reduction at 6mo and ∼24% [46% to 22%] absolute xerostomia reduction at 12 mo) and more achievable (∼60% of patients vs ∼35% patients) than mean dose parotid gland sparing per QUANTEC constraint. Atlas-based segmentation estimated that MRI sialography guided parotid duct sparing reduced the parotid duct dose by 9 Gy and that only 20% of patients met the parotid duct dose constraint (<14 Gy) with conventional parotid gland mean dose sparing.
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Affiliation(s)
- D V Fried
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - M Ahmidouch
- University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - C Shen
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - S K Das
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - L B Marks
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - B S Chera
- Department of Radiation Oncology, Medical University of South Carolina, Charleston, SC
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Mazur L, Amos A, Weiner AA, Chera BS, Dance MJ, McGurk R, Person T, Pineiro B, Couch A, Risgaard S, Herath J, Das SK, Marks LB. Assessing the Sustainability of Initiatives Aimed to Enhance Patient Safety Culture: A > 10-year Experience with Multifaceted Interventions. Int J Radiat Oncol Biol Phys 2023; 117:S146. [PMID: 37784372 DOI: 10.1016/j.ijrobp.2023.06.562] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Culture is a key factor in maintaining high-quality care. We have instituted a series of mutually-reinforcing initiatives aimed to improve operations, and patient and staff safety. We herein review the impact of these initiatives on our Patient Safety Culture over 14 years. We hypothesize that these initiatives can lead to sustained improvements in Culture. MATERIALS/METHODS In ≈ 2009, our department, with help of dedicated quality improvement coaches from our internal Division of Healthcare Engineering (with knowledge of Lean-Six Sigma and High Reliability methods and tools), instituted (and largely sustained) initiatives aimed to improve our operations, and to improve patient/staff safety; including: (a) daily multidisciplinary team huddles, (b) daily pre-planning/treatment peer review, (c) a robust Incident Learning System, (d) weekly meetings to review reported incidents, (e) monthly department-wide meetings to review the highlights from the weekly incident review meetings, (f) celebration/recognitions for staff participation and (g) leader Gemba walks. Culture was quantitatively assessed via the AHRQ (Agency for Healthcare Research and Quality) Patient Safety Culture Survey (with 51 questions) which was sent to the department every two years (2021 was skipped due to Covid). Changes in the summary survey results over time were assessed using 2-tailed chi-square. RESULTS Within 2-4 years of starting of our initiatives, there was an increase in the number of survey respondents, and an increase in the % of favorable responses (vs. pre-initiative data from 2009), for most comparisons (see Table with representative data). The % favorable responses plateaued in ≈ 2013-2015, and there was a non-significant decline in % favorable responses in later years (vs. the high scores in 2015). CONCLUSION A series of mutually reinforcing initiatives aimed to improve operations, and to improve patient/staff safety, can lead to improvements in Patient Safety Culture; and these improvements can be largely sustained over time. Some of the modest non-significant decline in later years may reflect staff changes, fatigue, increasing practice complexity, financial pressures, and/or Covid-related issues (in the 2022 survey). This speaks to the importance of maintaining quality/safety initiatives through transitions in leadership, staff and external stressors.
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Affiliation(s)
- L Mazur
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - A Amos
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - A A Weiner
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - B S Chera
- Department of Radiation Oncology, Medical University of South Carolina, Charleston, SC
| | - M J Dance
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - R McGurk
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
| | - T Person
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - B Pineiro
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - A Couch
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - S Risgaard
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - J Herath
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - S K Das
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - L B Marks
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, NC
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Roczkowsky A, Limonta D, Fernandes JP, Branton WG, Clarke M, Hlavay B, Noyce RS, Joseph JT, Ogando NS, Das SK, Elaish M, Arbour N, Evans DH, Langdon K, Hobman TC, Power C. COVID-19 Induces Neuroinflammation and Suppresses Peroxisomes in the Brain. Ann Neurol 2023; 94:531-546. [PMID: 37190821 DOI: 10.1002/ana.26679] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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] [Received: 12/20/2022] [Revised: 04/25/2023] [Accepted: 04/28/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE Peroxisome injury occurs in the central nervous system (CNS) during multiple virus infections that result in neurological disabilities. We investigated host neuroimmune responses and peroxisome biogenesis factors during severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection using a multiplatform strategy. METHODS Brain tissues from coronavirus disease 2019 (COVID-19) (n = 12) and other disease control (ODC) (n = 12) patients, as well as primary human neural cells and Syrian hamsters, infected with a clinical variant of SARS-CoV-2, were investigated by droplet digital polymerase chain reaction (ddPCR), quantitative reverse transcriptase PCR (RT-qPCR), and immunodetection methods. RESULTS SARS-CoV-2 RNA was detected in the CNS of 4 patients with COVID-19 with viral protein (NSP3 and spike) immunodetection in the brainstem. Olfactory bulb, brainstem, and cerebrum from patients with COVID-19 showed induction of pro-inflammatory transcripts (IL8, IL18, CXCL10, NOD2) and cytokines (GM-CSF and IL-18) compared to CNS tissues from ODC patients (p < 0.05). Peroxisome biogenesis factor transcripts (PEX3, PEX5L, PEX11β, and PEX14) and proteins (PEX3, PEX14, PMP70) were suppressed in the CNS of COVID-19 compared to ODC patients (p < 0.05). SARS-CoV-2 infection of hamsters revealed viral RNA detection in the olfactory bulb at days 4 and 7 post-infection while inflammatory gene expression was upregulated in the cerebrum of infected animals by day 14 post-infection (p < 0.05). Pex3 transcript levels together with catalase and PMP70 immunoreactivity were suppressed in the cerebrum of SARS-CoV-2 infected animals (p < 0.05). INTERPRETATION COVID-19 induced sustained neuroinflammatory responses with peroxisome biogenesis factor suppression despite limited brainstem SARS-CoV-2 neurotropism in humans. These observations offer insights into developing biomarkers and therapies, while also implicating persistent peroxisome dysfunction as a contributor to the neurological post-acute sequelae of COVID-19. ANN NEUROL 2023;94:531-546.
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Affiliation(s)
- A Roczkowsky
- Department of Medicine, University of Alberta, Edmonton, AB, USA
| | - D Limonta
- Department of Cell Biology, University of Alberta, Edmonton, AB, USA
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton, AB, USA
| | - J P Fernandes
- Department of Medical Microbiology & Immunology, University of Alberta, Edmonton, AB, USA
| | - W G Branton
- Department of Medicine, University of Alberta, Edmonton, AB, USA
| | - M Clarke
- Department of Medicine, University of Alberta, Edmonton, AB, USA
| | - B Hlavay
- Department of Medicine, University of Alberta, Edmonton, AB, USA
| | - R S Noyce
- Department of Medical Microbiology & Immunology, University of Alberta, Edmonton, AB, USA
| | - J T Joseph
- Department of Pathology, University of Calgary, Calgary, AB, USA
| | - N S Ogando
- Department of Medicine, University of Alberta, Edmonton, AB, USA
| | - S K Das
- Department of Laboratory Medicine & Pathology, University of Alberta, Edmonton, AB, USA
| | - M Elaish
- Department of Cell Biology, University of Alberta, Edmonton, AB, USA
| | - N Arbour
- Department of Neuroscience, University of Montreal, and CHUM, Montreal, QC, Canada
| | - D H Evans
- Department of Medical Microbiology & Immunology, University of Alberta, Edmonton, AB, USA
| | - K Langdon
- Department of Pathology, University of Calgary, Calgary, AB, USA
| | - T C Hobman
- Department of Cell Biology, University of Alberta, Edmonton, AB, USA
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton, AB, USA
- Department of Medical Microbiology & Immunology, University of Alberta, Edmonton, AB, USA
| | - C Power
- Department of Medicine, University of Alberta, Edmonton, AB, USA
- Department of Medical Microbiology & Immunology, University of Alberta, Edmonton, AB, USA
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Ravi A, Mulkapuri S, Das SK. Hydroxylated Polyoxometalate with Cu(II)- and Cu(I)-Aqua Complexes: A Bifunctional Catalyst for Electrocatalytic Water Splitting at Neutral pH. Inorg Chem 2023; 62:12650-12663. [PMID: 37233196 DOI: 10.1021/acs.inorgchem.3c00423] [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: 05/27/2023]
Abstract
A sole inorganic framework material [Li(H2O)4][{CuI(H2O)1.5} {CuII(H2O)3}2{WVI12O36(OH)6}]·N2·H2S·3H2O (1) consisting of a hydroxylated polyoxometalate (POM) anion, {WVI12O36(OH)6}6-, a mixed-valent Cu(II)- and Cu(I)-aqua cationic complex species, [{CuI(H2O)1.5}{CuII(H2O)3}2]5+, a Li(I)-aqua complex cation, and three solvent molecules, has been synthesized and structurally characterized. During its synthesis, the POM cluster anion gets functionalized with six hydroxyl groups, i.e., six WVI-OH groups per cluster unit. Moreover, structural and spectral analyses have shown the presence of H2S and N2 molecules in the concerned crystal lattice, formed from "sulfate-reducing ammonium oxidation (SRAO)". Compound 1 functions as a bifunctional electrocatalyst exhibiting oxygen evolution reaction (OER) by water oxidation and hydrogen evolution reaction (HER) by water reduction at the neutral pH. We could identify that the hydroxylated POM anion and copper-aqua complex cations are the functional sites for HER and OER, respectively. The overpotential, required to achieve a current density of 1 mA/cm2 in the case of HER (water reduction), is found to be 443 mV with a Faradaic efficiency of 84% and a turnover frequency of 4.66 s-1. In the case of OER (water oxidation), the overpotential needed to achieve a current density of 1 mA/cm2 is obtained to be 418 mV with a Faradaic efficiency of 80% and turnover frequency of 2.81 s-1. Diverse electrochemical controlled experiments have been performed to conclude that the title POM-based material functions as a true bifunctional catalyst for electrocatalytic HER as well as OER at the neutral pH without catalyst reconstruction.
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Affiliation(s)
- Athira Ravi
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
| | - Sateesh Mulkapuri
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
| | - Samar K Das
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
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Rai S, Kumar M, Jas R, Mandal GP, Samanta I, Rajendar M, Tripura S, Das SK, Mondal M, Mandal DK. Antibacterial effect of kitchen herbs against pathogenic multidrug-resistant E. coli isolates from calf diarrhoea. Trop Anim Health Prod 2023; 55:211. [PMID: 37204503 DOI: 10.1007/s11250-023-03628-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/09/2023] [Indexed: 05/20/2023]
Abstract
Calf diarrhoea remains the biggest challenge both in the small and large farms. Infectious diarrhoea is associated with many pathogens, Escherichia coli being one, but majority are systematically treated with antibiotics. Since antimicrobial resistance (AMR) is a growing menace, the need to find alternative prophylactic solutions using popular kitchen herbs such as Trachyspermum ammi (carom seeds), Curcuma longa (turmeric) and cinnamon (Cinnamomum sp.) extracts is been investigated against virulent form of E. coli isolated from calf diarrhoea. The virulence factors identified in these isolates were ST (32.5%), LT (20%), eaeA (15%), stx1 (2.5%) and stx2 (5%) with the occurrence of the most common serogroups as O18 (15%) followed by O111 (12.5%). Highest resistance was seen with beta lactam + beta lactamase inhibitor (amoxicillin/clavulanic acid) followed by beta lactams (ampicillin, cefuroxime and cefepime). The zone of inhibition due to cinnamon (methanol) and carom seed (ethanol) extracts (500 to 250 μg/mL concentration) on E. coli bacteria was >19 mm, respectively. Turmeric, cinnamon and carom had the potency of inhibiting the pathogenic E. coli which maybe suggestive of its use in calf diets as prophylaxis against diarrhoea.
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Affiliation(s)
- Saroj Rai
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India.
| | - M Kumar
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India
| | - R Jas
- West Bengal University of Animal and Fishery Sciences, Belgachia, Kolkata, WB, India
| | - G P Mandal
- West Bengal University of Animal and Fishery Sciences, Belgachia, Kolkata, WB, India
| | - I Samanta
- West Bengal University of Animal and Fishery Sciences, Belgachia, Kolkata, WB, India
| | - M Rajendar
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India
| | - S Tripura
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India
| | - S K Das
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India
| | - M Mondal
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India
| | - D K Mandal
- Indian Council of Agricultural Research - National Dairy Research Institute, Eastern Regional Station, Kalyani, WB, 741235, India
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Waziry R, Ryan CP, Corcoran DL, Huffman KM, Kobor MS, Kothari M, Graf GH, Kraus VB, Kraus WE, Lin DTS, Pieper CF, Ramaker ME, Bhapkar M, Das SK, Ferrucci L, Hastings WJ, Kebbe M, Parker DC, Racette SB, Shalev I, Schilling B, Belsky DW. Author Correction: Effect of long-term caloric restriction on DNA methylation measures of biological aging in healthy adults from the CALERIE trial. Nat Aging 2023:10.1038/s43587-023-00432-y. [PMID: 37161091 DOI: 10.1038/s43587-023-00432-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Affiliation(s)
- R Waziry
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
| | - C P Ryan
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
| | - D L Corcoran
- Department of Genetics, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - K M Huffman
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - M S Kobor
- Department of Medical Genetics, Edwin S.H. Leong Healthy Aging Program, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada
| | - M Kothari
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
| | - G H Graf
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA
| | - V B Kraus
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - W E Kraus
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - D T S Lin
- Department of Medical Genetics, Edwin S.H. Leong Healthy Aging Program, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada
| | - C F Pieper
- Center on Aging and Development, Biostatistics and Bioinformatics, Duke University, Durham, NC, USA
| | - M E Ramaker
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - M Bhapkar
- Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC, USA
| | - S K Das
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - L Ferrucci
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - W J Hastings
- Department of Biobehavioral Health, Pennsylvania State University, State College, PA, USA
| | - M Kebbe
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - D C Parker
- Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - S B Racette
- Program in Physical Therapy and Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - I Shalev
- Department of Biobehavioral Health, Pennsylvania State University, State College, PA, USA
| | - B Schilling
- Buck Institute for Research on Aging, Novato, CA, USA
| | - D W Belsky
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA.
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA.
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Siraz MMM, Das SK, Mondol MS, Alam MS, Al Mahmud J, Rashid MB, Khandaker MU, Yeasmin S. Evaluation of transfer factors of 226Ra, 232Th, and 40K radionuclides from soil to grass and mango in the northern region of Bangladesh. Environ Monit Assess 2023; 195:579. [PMID: 37067680 DOI: 10.1007/s10661-023-11223-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Bangladesh is a rapidly developing country, which is vulnerable to various types of pollution due to the large-scale industrial and associated human activities that might potentially affect the locally harvested foodstuffs. Therefore, the transfer factor is an essential tool to assess the safety of foodstuffs due to the presence of natural radioactivity in environmental matrix and/or strata. This is a first study of its kind conducted in a well-known region for mango farming in Bangladesh, measuring the uptake of naturally occurring radioactive materials (NORMs) by grass and mango from soil to assess the ingestion doses to humans. The HPGe gamma-ray detector was used to determine the concentrations of NORMs in samples of soil (20), grass (10), and mango (10), which were then used to calculate the transfer factors of soil to grass and soil to mango. Average activity concentrations of 226Ra, 232Th, and 40K in associated soil samples (47.27 ± 4.10, 64.49 ± 4.32, 421.60 ± 28.85) of mango and 226Ra and 232Th in associated soil samples (45.07 ± 3.93, 52.17 ± 3.95) of grass were found to exceed the world average values. The average transfer factors (TFs) for mango were obtained in the order of 40K(0.80) > 226Ra (0.61) > 232Th (0.31), and for grass, it shows the order of 40K (0.78) > 232Th (0.64) > 226Ra (0.56). However, a few values (3 mango samples and 3 grass samples) of the estimated TFs exceeded the recommended limits. Moreover, Bangladesh lacks the transfer factors for most of the food crops; therefore, calculation of TFs in the major agricultural products is required all over Bangladesh, especially the foodstuffs produced near the Rooppur Nuclear Power Plant, which is scheduled to be commissioned in 2023.
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Affiliation(s)
- M M Mahfuz Siraz
- Health Physics Division, Atomic Energy Centre, Dhaka, 1000, Bangladesh
| | - S K Das
- Department of Physics, Jagannath University, Dhaka, 1100, Bangladesh.
| | - M S Mondol
- Department of Physics, Jagannath University, Dhaka, 1100, Bangladesh
| | - M S Alam
- Department of Nuclear Engineering, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Jubair Al Mahmud
- Department of Nuclear Engineering, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Md Bazlar Rashid
- Geological Survey of Bangladesh, Segunbaghicha, Dhaka, 1000, Bangladesh
| | - Mayeen Uddin Khandaker
- Department of General Educational Development, Faculty of Science and Information Technology, Daffodil International University, DIU Rd, Dhaka, 1341, Bangladesh
- Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway, Selangor, 47500, Malaysia
| | - S Yeasmin
- Health Physics Division, Atomic Energy Centre, Dhaka, 1000, Bangladesh
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10
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Waziry R, Ryan CP, Corcoran DL, Huffman KM, Kobor MS, Kothari M, Graf GH, Kraus VB, Kraus WE, Lin DTS, Pieper CF, Ramaker ME, Bhapkar M, Das SK, Ferrucci L, Hastings WJ, Kebbe M, Parker DC, Racette SB, Shalev I, Schilling B, Belsky DW. Effect of long-term caloric restriction on DNA methylation measures of biological aging in healthy adults from the CALERIE trial. Nat Aging 2023; 3:248-257. [PMID: 37118425 PMCID: PMC10148951 DOI: 10.1038/s43587-022-00357-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/22/2022] [Indexed: 04/30/2023]
Abstract
The geroscience hypothesis proposes that therapy to slow or reverse molecular changes that occur with aging can delay or prevent multiple chronic diseases and extend healthy lifespan1-3. Caloric restriction (CR), defined as lessening caloric intake without depriving essential nutrients4, results in changes in molecular processes that have been associated with aging, including DNA methylation (DNAm)5-7, and is established to increase healthy lifespan in multiple species8,9. Here we report the results of a post hoc analysis of the influence of CR on DNAm measures of aging in blood samples from the Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy (CALERIE) trial, a randomized controlled trial in which n = 220 adults without obesity were randomized to 25% CR or ad libitum control diet for 2 yr (ref. 10). We found that CALERIE intervention slowed the pace of aging, as measured by the DunedinPACE DNAm algorithm, but did not lead to significant changes in biological age estimates measured by various DNAm clocks including PhenoAge and GrimAge. Treatment effect sizes were small. Nevertheless, modest slowing of the pace of aging can have profound effects on population health11-13. The finding that CR modified DunedinPACE in a randomized controlled trial supports the geroscience hypothesis, building on evidence from small and uncontrolled studies14-16 and contrasting with reports that biological aging may not be modifiable17. Ultimately, a conclusive test of the geroscience hypothesis will require trials with long-term follow-up to establish effects of intervention on primary healthy-aging endpoints, including incidence of chronic disease and mortality18-20.
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Affiliation(s)
- R Waziry
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
| | - C P Ryan
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
| | - D L Corcoran
- Department of Genetics, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - K M Huffman
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - M S Kobor
- Department of Medical Genetics, Edwin S.H. Leong Healthy Aging Program, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada
| | - M Kothari
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
| | - G H Graf
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA
| | - V B Kraus
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - W E Kraus
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - D T S Lin
- Department of Medical Genetics, Edwin S.H. Leong Healthy Aging Program, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada
| | - C F Pieper
- Center on Aging and Development, Biostatistics and Bioinformatics, Duke University, Durham, NC, USA
| | - M E Ramaker
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - M Bhapkar
- Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC, USA
| | - S K Das
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - L Ferrucci
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - W J Hastings
- Department of Biobehavioral Health, Pennsylvania State University, State College, PA, USA
| | - M Kebbe
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - D C Parker
- Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - S B Racette
- Program in Physical Therapy and Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - I Shalev
- Department of Biobehavioral Health, Pennsylvania State University, State College, PA, USA
| | - B Schilling
- Buck Institute for Research on Aging, Novato, CA, USA
| | - D W Belsky
- Butler Columbia Aging Center, Columbia University Mailman School of Public Health, New York, NY, USA.
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA.
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11
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Ramathulasamma M, Bommakanti S, Das SK. Diverse coordination architectures based on a flexible multidentate carboxylate ligand and N-donor linkers: synthesis, structure, supramolecular chemistry and related properties. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116216] [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: 11/21/2022]
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12
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Kumar NT, Vaddypally S, Das SK. A Rearrangement Reaction to Yield a NH 4 + Ion Driven by Polyoxometalate Formation. ACS Omega 2022; 7:31474-31481. [PMID: 36092612 PMCID: PMC9454273 DOI: 10.1021/acsomega.2c04015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/11/2022] [Indexed: 06/15/2023]
Abstract
Triethylamine is a volatile liquid and exists in the atmosphere in the gas phase. It is a hazardous air pollutant and identified as a toxic air contaminant. Thus, producing ammonia (a vital chemical for fertilizer production) from the vapor state of this toxic substance is a challenging task. Diffusion of the vapor of triethylamine, (C2H5)3N, into an acidified aqueous solution of sodium molybdate results in the formation of single crystals of compound [(C2H5)3NH]2[(C2H5)4N][NaMo8O26] (1). Notably, compound 1 includes a [(C2H5)4N]+ cation, even though the concerned reaction mixture was not treated with any tetraethylammonium salt. The formation of the [(C2H5)4N]+ cation from (C2H5)3N in an acidic aqueous medium is logically possible only when an ammonium cation (NH4 +) is formed in the overall reaction: 4(C2H5)3N + 4H+ = 3[(C2H5)4N]+ + [NH4]+. Although the resulting NH4 + cation (identified by Nessler's reagent test) is not included in the crystals of compound 1 as a cation, it can be made associated with a crown ether in the isolation of single crystals of compound [NH4⊂B15C5]3[PMo12O40]·B15C5 (2), (B15C5 = benzo-15-crown-5). Crystal structure analysis and 1H NMR studies of compound 2 have established the presence of an H-bonded NH4 + ion in compound 2, thereby established the rearrangement reaction.
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Affiliation(s)
- N. Tanmaya Kumar
- School
of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad, Telangana 500046, India
| | - Shivaiah Vaddypally
- Department
of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Samar K. Das
- School
of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad, Telangana 500046, India
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Mulkapuri S, Ravi A, Nasani R, Kurapati SK, Das SK. Barrel-Shaped-Polyoxometalates Exhibiting Electrocatalytic Water Reduction at Neutral pH: A Synergy Effect. Inorg Chem 2022; 61:13868-13882. [PMID: 36006778 DOI: 10.1021/acs.inorgchem.2c01811] [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: 11/28/2022]
Abstract
Two copper-based barrel-shaped polyoxometalates (POMs), namely, [{H3O}4{Na6(H2O)22}][{CuI (H2O)3}2{CuII (H2O)}3{B-α-BiIIIWVI9O33}2]·7H2O (NaCu-POM) and Li4[{NH4}2{H3O}3{Li(H2O)5}][{CuII(SH)}{(CuIICuI1.5)(B-α-BiIIIWVI9O33)}2]·9H2O (LiCu-POM) have been synthesized and structurally characterized. The single-crystal X-ray diffraction analyses of NaCu-POM and LiCu-POM reveal the presence of penta- and hexa-nuclear copper wheels per formula units, respectively; these copper wheels are sandwiched between two lacunary Keggin anions {B-α-BiIIIWVI9O33}9- (BiW9) to form the barrel-shaped title POM compounds. In both the compounds NaCu-POM and LiCu-POM, the mixed-valent copper centers are present in their respective penta- and hexa-nuclear copper wheels, established by X-ray photoelectron spectroscopy (XPS) as well as by bond valence sum (BVS) calculations. Compound LiCu-POM additionally shows the presence of a sulfhydryl ligand (SH-), coordinated to one of the copper centers of its {Cu6}-wheel, that is expected to be generated from the in situ reduction of sulfate anion present in the concerned reaction mixture (lithium-ion in ammonia solution may be the reducing agent). Interestingly, the title compounds, NaCu-POM and LiCu-POM exhibit an efficient electrocatalytic hydrogen evolution reaction (HER) by reducing water at neutral pH. Detailed electrochemical studies including controlled experiments indicate that the active sites for this electrocatalysis are the W(VI) centers of the title compounds, not the copper centers. However, a relevant tri-lacunary Keggin cluster anion {PVWVI9O33}7- (devoid of copper ion) does not show comparable HER as shown by the title compounds. The intra-cluster cooperative interactions of the mixed-valent copper centers (CuII/CuI) with the tungsten centers (W6+) make the overall system electrocatalytically active toward water reduction to molecular hydrogen at neutral pH. High Faradaic efficiencies (89 and 92%) and turnover frequencies (1.598 s-1 and 1.117 s-1) make the title compounds NaCu-POM and LiCu-POM efficient catalysts toward electrochemical water reduction to molecular hydrogen.
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Affiliation(s)
- Sateesh Mulkapuri
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
| | - Athira Ravi
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
| | - Rajendar Nasani
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
| | - Sathish Kumar Kurapati
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India.,Department of Chemistry, Chaitanya Bharathi Institute of Technology Hyderabad, Gandipet, Hyderabad 500075, India
| | - Samar K Das
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
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14
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Jana D, Kolli HK, Das SK. Single Crystals of α-MoO 3-Intercalated {Ni(H 2O) 6} 2+ and Electrocatalytic Water Reduction: Toward a Class of Molybdenum Bronzes. Inorg Chem 2022; 61:3816-3820. [PMID: 35179361 DOI: 10.1021/acs.inorgchem.1c03978] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have successfully intercalated {NiII(H2O)6}2+ into the α-MoO3 layer, leading to the isolation of green single crystals of [MoVI2O6(CH3COO){NiII(H2O)6}0.5]·H2O (1). The homogeneous electrochemistry of 1 in its aqueous solution exhibits electrocatalytic hydrogen evolution reaction (HER) with concomitant electrochemical deposition of [HMo3VIMoVO12(CH3COO){NiII(H2O)5(OH)}] (2). Compound 2, a new molybdenum bronze, acts as an efficient and stable heterogeneous electrocatalyst for water reduction to molecular hydrogen. This work represents the first paradigm of a molybdenum bronze intercalating a transition metal-aqua ion.
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Affiliation(s)
- Debu Jana
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad, Telangana 500046, India
| | - Hema Kumari Kolli
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad, Telangana 500046, India
| | - Samar K Das
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad, Telangana 500046, India
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15
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Mulkapuri S, Ravi A, Mukhopadhyay S, Kurapati SK, Siby V, Das SK. WVI‒OH Functionality on polyoxometalates for water reduction to molecular hydrogen. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00421f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT: Grafting a WVI‒(OH)2 functionality on polyoxometalates (POMs)’ surface makes the concerned POM compounds, Na6[{CoII(H2O)3}2{WVI(OH)2}2{BiIIIWVI9O33)2}]·8H2O (1) and Na4(Himi)2[{MnII(H2O)3}2{WVI(OH)2}2{BiIIIWVI9O33)2}]·28H2O (2) prominent heterogeneous electrocatalysts for water reduction to molecular hydrogen. We have...
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16
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Salahuddin AZ, Roy AS, Ahammed SU, Asadujjaman M, Das SK, Hossain MB, Miah OF, Borman GC, Afroz N, Bhattacharjee S, Rahman MM, Datta P, Islam MS, Hasib M, Islam H, Firoz NH, Khan SR, Saha BK, Khan SI. Pattern of Glomerular Disease in a Tertiary Care Hospital of Bangladesh. Mymensingh Med J 2022; 31:80-87. [PMID: 34999684] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Glomerular disease is one of the most important causes of chronic kidney disease in developing countries like Bangladesh as well as the whole world. The pattern of glomerular disease varies in different countries and can have different clinical presentations. The aim of the study was to analyze the clinical profile and to determine the histological pattern of glomerular diseases in a large tertiary care hospital in Bangladesh. All kidney biopsies performed in Mymensingh Medical College Hospital, Bangladesh from October 2018 to March 2020 were prospectively analyzed in the study. A total of 101 patients with kidney biopsy were examined by clinical and laboratory findings and by light and immuno-fluorescence microscopy. The mean age was 30.0±14.6 years and 50(49.5%) were male and 51(50.5%) were female with a male to female ratio of 1:1. The clinical syndromes namely nephrotic syndrome, nephritic syndrome, nephrito-nephrotic presentation, RPGN like presentation, macroscopic haematuria and asymptomatic urine abnormality were present in 31.7%, 34.5%, 22.8%, 11.9%, 19.8% and 10.9% patients respectively. The most common histological varieties found in the study were mesangial proliferative glomerulonephritis (MesPGN) (18.8%) and focal segmental glomerulosclerosis (FSGS) (18.8%). Other histopathological pattern among the studied subjects revealed minimal change disease (MCD) in 5.9%, membranous nephropathy (MN) in 7.9%, membranoproliferative glomerulonephritis (MPGN) in 16.8%, IgA nephropathy in 5%, IgM nephropathy in 2%, IgG nephropathy in 2%, diffuse proliferative glomerulonephritis (DPGN) in 1%, focal proliferative glomerulo-nephritis (FPGN) in 3%, crescentic GN in 3%, lupus nephritis (LN) in 13.9%, amyloidosis in 1% and fibrillary glomerulopathy in 1% patient. The pattern of glomerular disease found in this study was similar to other studies performed in Bangladesh with a little variation. It may guide the future researchers to establish a national kidney biopsy registry in Bangladesh.
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Affiliation(s)
- A Z Salahuddin
- Dr Abu Zafor Md Salahuddin, Registrar, Department of Nephrology, Mymensingh Medical College Hospital (MMCH), Mymensingh, Bangladesh; E-mail:
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17
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Das SK, Burma AD, Amudhan S, Mishra V, Mahapatra P, Ashok A, Philip M. Do children in India grow well into adolescents? Longitudinal analysis of growth transitions from Young Lives panel survey in India. Public Health 2021; 202:18-25. [PMID: 34875532 DOI: 10.1016/j.puhe.2021.10.010] [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: 06/18/2021] [Revised: 10/06/2021] [Accepted: 10/19/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Studies that examined the growth during late childhood and early adolescence beyond 8 years of age are very limited. Further, most studies have used dichotomized classification of stunting, thereby limiting the understanding of moderate stunting in childhood growth trajectory. We aimed to examine the course of stunting from childhood to adolescence by undertaking robust analyses of the Young Lives Survey (YLS) longitudinal data from India using multilevel categorization of stunting. STUDY DESIGN Retrospective cohort analysis was undertaken from YLS in India among 1827 children from the younger cohort born in 2001-02 with complete follow-up data in all five rounds of YLS collected in 2002, 2006, 2009, 2013, and 2016. METHODS A three-state multistate Markov model (not stunted, moderate, severe) was performed to estimate annual transition probabilities, mean sojourn-time, and transition-specific risk factors. RESULTS Between Round-one and Round-five, cross-sectional prevalence of severe stunting decreased from 10.4% (95% confidence interval [CI]: 7.8%, 13.7%) to 5.3% (95% CI: 3.8%, 7.3%), while moderate stunting increased from 19.9% (95% CI: 16.3%,23.9%) to 21.7% (95% CI: 18.4%, 24.9%). Mean Sojourn time estimation indicated a relatively concise state for moderate stunting. The stunting trajectory had shown gender differential where more faltering to severe stunting and lower recovery to the normal state was observed among girls between 8 and 12 years and among boys between 12 and 15 years. Compared with boys, girls had 40% excess likelihood (Hazard Ratio: 1.40; 95% CI 1.00 to 1.95) for moderate-to-severe stunting transition and also had 19% excess likelihood (Hazard Ratio: 1.19; 95% CI 1.01 to 1.40) of favorable transition (moderate-to-non-stunted). CONCLUSIONS The transition trajectory highlights preadolescence, especially among girls, as an additional window of opportunity to ensure better nutrition in adolescent life. With a fifth of adolescents living in India, study findings call for coordinated, multisectoral, age-appropriate, and gender-responsive approach to take India closer to meeting SDG-2.
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Affiliation(s)
- S K Das
- Department of Biostatistics, National Institute of Mental Health and Neuro Sciences, Bangalore, India
| | - A D Burma
- Department of Epidemiology, National Institute of Mental Health and Neuro Sciences, Bangalore, India
| | - S Amudhan
- Department of Epidemiology, National Institute of Mental Health and Neuro Sciences, Bangalore, India.
| | - V Mishra
- Consultant-Rapid Response Team, WHO, India
| | - P Mahapatra
- Department of Epidemiology, National Institute of Mental Health and Neuro Sciences, Bangalore, India
| | - A Ashok
- Department of Epidemiology, National Institute of Mental Health and Neuro Sciences, Bangalore, India
| | - M Philip
- Department of Biostatistics, National Institute of Mental Health and Neuro Sciences, Bangalore, India
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Ramathulasamma M, Bommakanti S, Das SK. A 'two-in-one' crystal having two different dimensionality in the extended structures: A series of cadmium(II) coordination polymers from V-shaped organic linkers. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115508] [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: 11/29/2022]
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Abstract
The reversible self-assembly of a {Mo72Fe30} cluster into nanoblackberries in a dilute solution of the relevant crystalline compound [Mo72Fe30O252(CH3COO)12{Mo2O7(H2O)}2{H2Mo2O8(H2O)}(H2O)91]·150H2O ({Mo72Fe30}cryst) was demonstrated by Liu, Müller, and their co-workers as a landmark discovery in the area of polyoxometalate chemistry. We have described, in the present work, how these ∼2.5 nm nano-objects, {M72Fe30} (M = W, Mo) can be self-assembled into nanoblackberries irreversibly, leading to their solid-state isolation as the nanomaterials Fe3[W72Fe30O252(CH3COO)2(OH)25(H2O)103]·180H2O ({W72Fe33}NM) and Na2[Mo72Fe30O252(CH3COO)4(OH)16(H2O)108]·180H2O ({Mo72Fe30}NM), respectively (NM stands for nanomaterial). The formulations of these one-pot-synthesized nanoblackberries of {W72Fe33}NM and {Mo72Fe30}NM have been established by spectral analysis including Raman spectroscopy, elemental analysis including ICP metal analysis, volumetric analysis (for iron), microscopy techniques, and DLS studies. The thermal stability of the tungsten nanoblackberries {W72Fe33}NM is much higher than that of its molybdenum analogue {Mo72Fe30}NM. This might due to the extra three ferric (Fe3+) ions per {W72Fe30} cluster in {W72Fe33}NM, which are not part of the {W72Fe30} cluster cage but are placed between two adjacent clusters (i.e., each cluster has six surrounding 0.5Fe3+) to form this self-assembly. The isolated blackberries behave like an inorganic acid, a water suspension of which shows pH values of 3.9 for {W72Fe33}NM and 3.7 for {Mo72Fe30}NM because of the deprotonation of the hydroxyl groups in them. We have demonstrated, for the first time, a meaningful application of these inexpensive and easily synthesized nanoblackberries by showing that they can act as electrocatalysts for the hydrogen evolution reaction (HER) by reducing water. We have performed detailed kinetic studies for the electrocatalytic water reduction catalyzed by {W72Fe33}NM and {Mo72Fe30}NM in a comparative study. The relevant turnover frequencies (TOFs) of {W72Fe33}NM and {Mo72Fe30}NM (∼0.72 and ∼0.45 s-1, respectively), the overpotential values of {W72Fe33}NM and {Mo72Fe30}NM (527 and 767 mV, respectively at 1 mA cm-2), and the relative stability issues of the catalysts indicate that {W72Fe33}NM is reasonably superior to {Mo72Fe30}NM. We have described a rationale of why {W72Fe33}NM performs better than {Mo72Fe30}NM in terms of catalytic activity and stability.
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Affiliation(s)
- Hema Kumari Kolli
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Debu Jana
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Samar K Das
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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20
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Jana D, Kolli HK, Sabnam S, Das SK. Efficient homogeneous electrocatalytic hydrogen evolution using a Ni-containing polyoxometalate catalyst. Chem Commun (Camb) 2021; 57:9910-9913. [PMID: 34494628 DOI: 10.1039/d1cc03605j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NiCl2·6H2O ([Ni(H2O)6]2Cl2) per se does not show electrocatalytic hydrogen evolution reaction activity (HER) in an acidic aqueous medium as well as in neutral water. Interestingly, when [Ni(H2O)6]2+ is present in a polyoxovanadate matrix, for example, in the compound K2[Ni(H2O)6]2[V10O28]·4H2O (1), it exhibits homogeneous electrocatalytic HER activity in an acidic aqueous solution with a turn over frequency of 2.1 s-1 and an effective low overpotential of 127 mV at pH 2.3. Compound 1 is the first nickel-containing polyoxometalate catalyst for hydrogen production via homogeneous electrocatalytic proton reduction without its decomposition under electrochemical conditions of HER.
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Affiliation(s)
- Debu Jana
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad - 500046, India.
| | - Hema Kumari Kolli
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad - 500046, India.
| | - Subhashree Sabnam
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad - 500046, India.
| | - Samar K Das
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad - 500046, India.
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Amin MR, Das SK, Kabir A, Islam MR, Ahmed SM, Hasan MJ. Open Label Randomized Controlled Comparison of Three Alternative Regimes of Ciprofloxacin, Azithromycin and Cefixime for Treatment of Uncomplicated Typhoid Fever in Bangladesh. Mymensingh Med J 2021; 30:725-737. [PMID: 34226462] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Multi-drug resistant Typhoid fever (resistant to previously used chloramphenicol, ampicillin, amoxicillin, and trimethoprim-sulfamethoxazole) has been commonly described in the South East Asia region and a recent report suggests that the salmonella typhi have reduced response to fluoroquinolones (nalidixic acid-resistant). The optimum treatment protocol for this type of serovar has not been established. This study compared different antimicrobial regimens for the treatment of uncomplicated typhoid fever which was conducted in the medicine ward of Dhaka Medical College Hospital (DMCH) and outdoor setting in private practice in Dhaka metropolitan city, Mymensingh and Sylhet town from January 2017 to December 2017. Bangladeshi adults with uncomplicated typhoid fever were included in this an open-label randomized controlled trial. Ciprofloxacin (20mg/kg of body weight/day for 14 days), azithromycin (20mg/kg/day for 14 days), and Cefixime (16mg/kg/day for 14 days) were compared. Of the 81 enrolled patients, 62 were eligible for analysis (61 S. enterica serovar Typhi, 1 Salmonella enterica serovar paratyphi A). Of the S enterica serovar Typhi isolates, 88.7% (55/62) were MDR and 93.5% (58/62) were nalidixic acid resistant (NAR). The clinical cure rate was 62% (13/21) with ciprofloxacin, 71% (15/21) with Cefixime, and 85% (17/20) with azithromycin (p=0.053). The mean (95% confidence interval [CI]) fever clearance time for patients treated with azithromycin (5.8 days [5.1 to 6.5 days]) was shorter than that for patients treated with cefixime (7.1 days [6.2 to 8.1 days]) and ciprofloxacin (8.2 days [7.2 to 9.2 days]) (p<0.001). All three antibiotics were well tolerated. A 7-day course of azithromycin can be successfully used in uncomplicated typhoid fever due to isolates of MDR S enterica serovar Typhi.
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Affiliation(s)
- M R Amin
- Dr Mohammad Robed Amin, Professor of Medicine, Line Director, NCDC, DGHS, Dhaka, Bangladesh; E-mail:
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Singh C, Haldar A, Basu O, Das SK. Devising a Polyoxometalate-Based Functional Material as an Efficient Electrocatalyst for the Hydrogen Evolution Reaction. Inorg Chem 2021; 60:10302-10314. [PMID: 34185987 DOI: 10.1021/acs.inorgchem.1c00734] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Hydrogen is the solution to all the problems associated with the energy crisis. Generating hydrogen from water splitting is one of the greener approaches, but it requires an efficient catalyst that is economical for the bulk production of hydrogen. The transition metal-aqua coordination complexes, which are otherwise inactive/unstable for electrochemical hydrogen evolution reaction (HER) activity, can efficiently be utilized for the same by attaching these metal-aqua species on a stable support. With a similar approach, we have synthesized and structurally characterized a two-dimensional polyoxometalate (POM)-copper complex hybrid that supports a copper(II)-aqua-bypyridine complex with a molecular formula of the overall system, [{CuII(2,2'-bpy)(H2O)2}][{CoIIWVI12O40}{CuII(2,2'-bpy)(H2O)}{CuII(2,2'-bpy)}]·2H2O (1). The bis(aqua)-mono(bipyridine) Cu(II)-complex fragment {CuII(2,2'-bpy)(H2O)2}2+, attached to the two-dimensional POM-Cu-complex support, acts as an active catalytic center that catalyzes the electrochemical HER. The electrochemical studies done for this work enabled us to understand the role of compound 1 as an electrocatalyst for the HER in near-neutral medium (pH 4.8), under buffered conditions (acetate buffer). Through detailed electrochemical experiments including controlled ones, we understand that compound 1 follows a proton-coupled electron transfer (PCET) pathway with one proton and one electron involvement in the HER. The overpotential required to achieve a current density of 1 mA/cm2 is found to be 520 mV with a Faradaic efficiency of 81%.
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Affiliation(s)
- Chandani Singh
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Atanu Haldar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Olivia Basu
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Samar K Das
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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Lele N, Kripa MK, Panda M, Das SK, Nivas AH, Divakaran N, Naik-Gaonkar S, Sawant A, Pattnaik AK, Samal RN, Thangaradjou T, Saravanakumar A, Rodrigues BF, Murthy TVR. Seasonal variation in photosynthetic rates and satellite-based GPP estimation over mangrove forest. Environ Monit Assess 2021; 193:61. [PMID: 33443643 DOI: 10.1007/s10661-021-08846-0] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
In view of increasing anthropogenic influences and global changes, quantification of carbon assimilation through photosynthesis has gained tremendous significance. Precise estimation of Gross Primary Productivity (GPP) is essential for several ecosystem models and is typically done using coarser scale satellite data. The mangrove ecosystem, which offers significant protection to the coastal environment, is one of the critical habitats from a global change point of view. Light use efficiency (LUE) was measured using diurnal in situ photosynthetic rate observations for 13 dominant mangrove species for 3 seasons at each of the three mangrove dominant test-sites situated along the east and west coast of India. Variations in photosynthetic rates among these species were studied for 3 seasons that indicated varying responses of mangrove ecosystem at each site. Among all species, Rhizophora mucronata and Sonneratia apetala indicated higher values at two of the test-sites. IRS Resourcesat-2 LISS-IV datasets were used for the estimation of GPP. Mean GPP for all the sites varied from 1.2 to 7.7 g C m-2 day-1 with maximum value of 14.4 g C m-2 day-1. Mean values of GPP varied across the sites, based on its maximum LUE values and available photosynthetically active radiation (PAR). The results provide GPP values at much better spatial resolution for a threatened habitat like mangroves that typically survive in a narrow habitat along the coasts.
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Affiliation(s)
- N Lele
- Agriculture and Land Ecosystem Division (AED-BPSG-EPSA), Space Applications Centre (ISRO), Ahmedabad, Gujarat, India.
| | - M K Kripa
- Agriculture and Land Ecosystem Division (AED-BPSG-EPSA), Space Applications Centre (ISRO), Ahmedabad, Gujarat, India
| | - M Panda
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - S K Das
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - A Hari Nivas
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | - N Divakaran
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | | | - A Sawant
- Botany Department, Goa University, Taleigao, Goa, India
| | - A K Pattnaik
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - R N Samal
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - T Thangaradjou
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | - A Saravanakumar
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | - B F Rodrigues
- Botany Department, Goa University, Taleigao, Goa, India
| | - T V R Murthy
- Agriculture and Land Ecosystem Division (AED-BPSG-EPSA), Space Applications Centre (ISRO), Ahmedabad, Gujarat, India
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Das SK, Roy DK, Chowdhury AA, Roy AS, Ahammed SU, Asadujjaman M, Rabbani MG, Islam MS, Barman GC, Chanda K, Hossain MB, Salahuddin AZ, Saha S, Das SK, Saha S, Ara J. Correlation of eGFR By MDRD and CKD-EPI Formula with Creatinine Clearance Estimation in CKD Patients and Healthy Subjects. Mymensingh Med J 2021; 30:35-42. [PMID: 33397848] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This cross sectional comparative study was conducted in the Nephrology and Medicine outdoor and in-patients department of Mymensingh Medical College Hospital, Bangladesh from April 2014 to March 2015. A total of 100 patients with CKD and 100 healthy subjects were included in the study. Data were collected by interview of the patients, clinical examination and laboratory investigations using a semi-structured case record form. Among all subjects, 50.0% had no CKD and 50.0% patients had CKD: Stage 3 CKD were 8.5%, CKD Stage 4 CKD were 21.0%, CKD Stage 5 CKD were 20.5%. Serum creatinine was 4.32±3.08mg/dl in patients with CKD and 1.00±0.22mg/dl was in healthy subjects. Mean±SD of CCR/ml/min was found 17.67±11.63ml/min in patients with CKD and 79.31±13.31ml/min was found in healthy subjects. On the other hand, Mean±SD CCCR/ml/m/1.73m² was found 19.79±12.85 ml/m/1.73m² in patient with CKD and healthy subjects had 83.83±13.33 ml/m/1.73m². Urinary creatinine was 45.59±15.63 & 57.66±11.45mg/dl respectively. CKD-EPI eGFR was 22.10±15.02 & 90.61±23.27ml/m/1.73m²; MDRD eGFR was 22.15±14.18 & 89.35±26.19 ml/m/1.73m² respectively. Difference between all the variables between CKD group and healthy group was found statistically significant (p<0.001). CKD-EPIeGFR and MDRDeGFR were increased both in CKD patients and healthy subjects in respect to CCR and CCCR. There was a strong positive correlation between CCCR (ml/m/1.73m2) and CKD-EPI (ml/m/1.73m²) among all patients (r=0.934 and p<0.001) and also a positive correlation of CCCR with MDRD among all patients (r=0.913 and p<0.001). A positive correlation of CCCR was found with CKD-EPIeGFR among CKD patients (r=0.848 and p<0.001). A positive correlation of CCCR was also found with MDRDeGFR among CKD patients (r=0.841, p<0.001). There are positive correlations between CCCR and CKD/EPI among healthy subjects (r=0.616 and p<0.05) and between CCCR with MDRD among healthy subjects (r=0.568 and p<0.05). Various formulae were used to calculate GFR on the basis of serum creatinine levels. The Overall correlation of population (healthy and CKD patients) between CCCR and CKD EPI and MDRD formula was (r=0.93 and 0.91) respectively, among CKD patients it was (r=0.848 and r=0.841) in healthy subjects it was (r=0.616 and r=0.568) respectively. CKD EPI eGFR and MDRD eGFR formula had fairly good correlation with conventional 24 hours creatinine clearance in both CKD patient and healthy subjects, there was even more strong correlation especially in CKD patients. The performance of CKD-EPI equation is better than MDRD equation to estimate the eGFR in both CKD patients and healthy subjects.
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Affiliation(s)
- S K Das
- Dr Samir Kumar Das, Assistant Professor, Department of Nephrology, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Sarmah H, Shah M, Pathak M, Barman NN, Koul M, Gupta A, Sahariah PJ, Neher S, Das SK, Gogoi SM, Kumar S. Pathodynamics of Circulating Strains of Duck Enteritis Virus: A Step Forward to Understand Its Pathogenesis. Avian Dis 2020; 64:166-173. [PMID: 32550617 DOI: 10.1637/0005-2086-64.2.166] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 10/17/2019] [Accepted: 01/22/2020] [Indexed: 11/05/2022]
Abstract
Duck enteritis virus (DEV) causes an acute and contagious infection in duck. The present study was carried out to evaluate the pathogenicity and pathodynamics of DEV isolates from different natural outbreaks in the Assam Province of India. A total of six wild-type isolates of DEV were revived in ducklings to determine its biologic characterization. Postmortem examination of infected ducklings revealed DEV-specific gross lesions in different organs. The presence of DEV was confirmed by its genome amplification and the presence of viral antigens from collected tissue samples by indirect fluorescent antibody test. All the isolates revived in ducklings were further propagated in duck embryo fibroblast cells. Highly virulent and low virulent isolates of DEV were selected for further study based on median duck infectivity dose (DID50) and median tissue culture infectivity dose (TCID50). The highly virulent isolate of DEV had values of 102 DID50/ml and 106.33 TCID50/ml, whereas the low virulent strain had titers of 10 DID50/ml and 104.83 TCID50/ml in the cell culture. Our results showed replication of DEV in ducks with the highest and lowest viral titers in the thymus and bursa of Fabricius, respectively. In addition, microscopic analysis revealed necrosis and degeneration of submucosal esophageal glands and glandular epithelium. The study will be useful to understand the organ tropism and pathologic alteration among the virulent DEV isolates.
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Affiliation(s)
- Hiramoni Sarmah
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Manisha Shah
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Mamta Pathak
- Department of Pathology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Nagendra N Barman
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Monika Koul
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Anjali Gupta
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Parag Jyoti Sahariah
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Samsun Neher
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - S K Das
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Sophia M Gogoi
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Sachin Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039,
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Roy AS, Ahammed AU, Das SK, Asadujjaman M, Hossain MB, Salahuddin AZ, Khan SI. Prevalence of Subclinical Hypothyroidism in Hospitalized Pre-dialysis Patients with Chronic Kidney Disease. Mymensingh Med J 2020; 29:764-770. [PMID: 33116075] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Among general population sub-clinical primary hypothyroidism is common. The cross sectional descriptive type of observational study was conducted in medicine and allied wards in Mymensingh Medical College Hospital, Mymensingh, Bangladesh from January 2010 to December 2010; among 230 purposively selected hospitalized pre-dialysis patients with chronic kidney disease. The purpose of the study was to find out the prevalence of sub-clinical hypothyroidism in hospitalized pre-dialysis patients with chronic kidney disease. Data were collected from the patients using a case record form by face to face interview, clinical examination and laboratory investigations. The collected data were entered into SPSS version 20.0 and analyzed accordingly. Mean age of the patients was 47.2 years with a SD of ±2.05 years. Maximum patients were male with a male female ratio of 5:1. A significant number of patients were smoker- 11.8% of sub-clinical hypothyroidism group and 13.6% of euthyroid group. Among the patients 40 (17.40%) had sub-clinical hypothyroidism while the majority 190 (82.60%) did not have it. Estimated prevalence of sub-clinical hypothyroidism in hospitalized pre-dialysis patients with chronic kidney disease was 17.40%. Co-morbidities found in the patients were hypertension, diabetes mellitus, chronic glomerulonephritis and obstructive uropathy. All the patients (40, 100.0%) with sub-clinical hypothyroidism were hypertensive. On the other hand, 184 (97.1%) patients without sub-clinical hypothyroidism were hypertensive. Presence of co-morbidities in patients with sub-clinical hypothyroidism did not differ significantly (p>0.05) from patients without sub-clinical hypothyroidism. Patients in group with sub-clinical hypothyroidism were more over weight in comparison to patients without sub-clinical hypothyroidism (p<0.05). Biochemical parameters of patients with sub-clinical hypothyroidism differed significantly (p<0.05) from those of patients without sub-clinical hypothyroidism. There was no significant difference between urinary albumin of two groups of patients (p>0.05). Stage 4 CKD patients were more in sub-clinical hypothyroidism group in comparison to euthyroid group. As this study may not reflect the actual picture, further large scale multi-centric study is recommended to explore the real situation of sub-clinical hypothyroidism in patients with chronic kidney disease.
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Affiliation(s)
- A S Roy
- Dr Ashutosh Saha Roy, Associate Professor, Department of Nephrology, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Mukhopadhyay S, Basu O, Das SK. ZIF‐8 MOF Encapsulated Co‐porphyrin, an Efficient Electrocatalyst for Water Oxidation in a Wide pH Range: Works Better at Neutral pH. ChemCatChem 2020. [DOI: 10.1002/cctc.202000804] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Subhabrata Mukhopadhyay
- School of Chemistry University of Hyderabad P.O. – Central University Hyderabad 500046 India
| | - Olivia Basu
- School of Chemistry University of Hyderabad P.O. – Central University Hyderabad 500046 India
| | - Samar K. Das
- School of Chemistry University of Hyderabad P.O. – Central University Hyderabad 500046 India
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Kumar NT, Bhoi U, Naulakha P, Das SK. A polyoxometalate supported copper dimeric complex: Synthesis, structure and electrocatalysis. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119554] [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: 01/08/2023]
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Madhu V, Kanakati AK, Das SK. Serendipitous isolation of a triazinone-based air stable organic radical: synthesis, crystal structure, and computation. NEW J CHEM 2020. [DOI: 10.1039/d0nj02028a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Here we report the synthesis, isolation, and characterization of a dication salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one {12+(PF6)22−·2H2O1(PF6)2·2H2O}, and its radical cation salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one (1+˙PF6−1˙PF6).
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Affiliation(s)
- Vedichi Madhu
- Department of Applied Chemistry
- Karunya Institute of Technology and Sciences
- Coimbatore 641 114
- India
- School of Chemistry
| | - Arun Kumar Kanakati
- School of Chemistry
- University of Hyderabad
- Central University P.O
- Hyderabad 500 046
- India
| | - Samar K. Das
- School of Chemistry
- University of Hyderabad
- Central University P.O
- Hyderabad 500 046
- India
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Mukhopadhyay S, Basu O, Nasani R, Das SK. Evolution of metal organic frameworks as electrocatalysts for water oxidation. Chem Commun (Camb) 2020; 56:11735-11748. [DOI: 10.1039/d0cc03659e] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The development of metal organic framework based water oxidation catalysts is discussed here in connection with various design strategies.
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Affiliation(s)
| | - Olivia Basu
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
| | - Rajendar Nasani
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
| | - Samar K. Das
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
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Khan SI, Iqbal M, Chowdhury AA, Roy AS, Ahammed SU, Asadujjaman M, Rahman MA, Hossain MB, Rabbani MG, Islam MS, Salahuddin AZ, Sarker NR, Das SK, Miah OF, Majumder RC, Borman GC. Comparison of Serum Amylase and Lipase Levels between Predialysis and Maintenance Haemodialysis CKD Patients. Mymensingh Med J 2020; 29:21-31. [PMID: 31915331] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This cross sectional study was done to compare serum levels of amylase and lipase between predialysis and maintenance haemodialysis chronic kidney disease (CKD) patients and also to find out their relationship between degrees of renal impairment in Mymensingh Medical College Hospital and National Institute of Kidney Diseases and Urology, Dhaka, Bangladesh from May 2016 to April 2017. A total of 80 patients were included purposively as study subjects and made into two groups namely predialysis CKD group comprising 50 patients and other as maintenance haemodialysis group comprising of 30 patients. Among the predialysis group majority of the CKD was caused by glomerulonephritis (48%) followed by diabetes (26%), HTN (2%) and large portion undiagnosed (24%) whereas in the haemodialysis group ESRD was caused by diabetes (46%) followed by glomerulonephritis (16%), HTN (13%) and undiagnosed (23%). This study showed that mean serum amylase (158±718U/L vs. 111±41U/L) did not significantly differ between study groups except being above reference level but serum lipase (739±888U/L vs. 434±214U/L) was significantly higher in the predialysis group. There was a correlation between rising serum creatinine with serum amylase and lipase.
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Affiliation(s)
- S I Khan
- Dr Md Sadiqul Islam Khan, MD (Nephrology) Thesis Part Student, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Mukhopadhyay S, Basu O, Kar A, Das SK. Efficient Electrocatalytic Water Oxidation by Fe(salen)–MOF Composite: Effect of Modified Microenvironment. Inorg Chem 2019; 59:472-483. [DOI: 10.1021/acs.inorgchem.9b02745] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - Olivia Basu
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Aranya Kar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Samar K. Das
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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Bodapati R, Sahoo C, Gudem M, Das SK. Mononuclear Ru(II) Complexes of an Arene and Asymmetrically Substituted 2,2'-Bipyridine Ligands: Photophysics, Computation, and NLO Properties. Inorg Chem 2019; 58:11470-11479. [PMID: 31429288 DOI: 10.1021/acs.inorgchem.9b01235] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By using monosubstituted 2,2'-bipyridine asymmetric ancillary ligands with different electron donor moieties and an arene ligand (p-cymene), we successfully designed and synthesized six Ru(II) compounds (RuBPY1-6) that belong to a piano-stool-type system. The NLO properties of the synthesized complexes have been studied in both solution and the solid state. The electronic spectra of these compounds show a broad feature with two absorption bands in the visible window (350-650 nm). RuBPY1-6 complexes exhibit NIR emission spectra in the solution state (at >720 nm), the maxima of which are bathochromically shifted in comparison to those of the concerned ligands. Interestingly, compounds RuBPY1-6 show NIR emission in their solid state too. Title compounds RuBPY1-6 have lifetimes in the range of 0.2 to 0.9 ns. An important feature of this work is the π-association of the p-cymene ligand to Ru(II) in the synthesized complexes; the π complex is formed by breaking the symmetry of p-cymene, found in the starting precursor (Ru2 dimer). This has been established by NMR spectral studies along with DFT calculations on the 1H NMR spectra. We could derive the molecular structure of the cationic part of this system by density functional theory (DFT), associated with 1H NMR spectral studies. The minimum energy structures for RuBPY1 and RuBPY2 have been optimized at DFT/B3LYP along with the LANL2DZ basis set for ruthenium atoms. These optimized structures are further considered to calculate the excited state properties using the TDDFT method. The electrochemical studies of the complexes, investigated in acetonitrile solution, show that this system is associated with a well-defined Ru(III)/Ru(II) reversible couple, rarely observed for a Ru(II) piano-stool-type compound, along with a feature of irreversible ligand oxidation. The absorption cross-section values, obtained from the two-photon absorption studies of title compounds RuBPY1-6, are worth reporting and lie in the range of 3-28 GM (in the femtosecond case).
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Affiliation(s)
- Ramakrishna Bodapati
- School of Chemistry , University of Hyderabad , Central University P.O. , Hyderabad 500 046 , Telangana , India
| | - Chakradhar Sahoo
- School of Physics , University of Hyderabad , Central University P.O. , Hyderabad 500046 , Telangana , India
| | - Mahesh Gudem
- Department of Chemistry , Indian Institute of Science Education and Research Pune , Dr. Homi Bhabha Road , Pune 411008 , Maharashtra , India
| | - Samar K Das
- School of Chemistry , University of Hyderabad , Central University P.O. , Hyderabad 500 046 , Telangana , India
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Karunakaran M, Gajare VC, Mandal A, Mondal M, Das SK, Ghosh MK, Rai S, Behera R. Electrophoretic profile of seminal proteins and their correlation with in vitro sperm characters in Black Bengal buck semen. Vet World 2019; 12:621-628. [PMID: 31327896 PMCID: PMC6584853 DOI: 10.14202/vetworld.2019.621-628] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 12/03/2018] [Accepted: 03/08/2019] [Indexed: 11/24/2022] Open
Abstract
Aim: This study aimed to study the electrophoretic properties of seminal plasma and sperm proteins of Black Bengal buck semen and their correlation with in vitro sperm characters and freezability. Materials and Methods: Semen ejaculates from nine Black Bengal bucks were collected by artificial vagina (n=20/buck). Ejaculates were evaluated for in vitro sperm characters and electrophoretic profile of seminal protein. In vitro sperm characters were evaluated immediately after collection, after completion of equilibration period, and after freeze-thawing. For seminal protein studies, seminal plasma proteins were precipitated by ice-cold ethanol method, and sperm proteins were extracted by Triton X detergent extraction method. Discontinuous sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) was performed to assess the molecular weight of seminal proteins. Correlation between in vitro sperm characters and protein bands was determined by Pearson’s correlation coefficient, and two-way ANOVA was applied to find the individual buck differences. Results: Significant difference (p<0.01) among the bucks was noticed in the in vitro sperm characters evaluated at all the three stages of semen evaluation such as immediately after collection, after completion of equilibration period, and post-freeze thawing. Progressive loss of sperm motility, membrane integrity, and other in vitro sperm characters were noticed during cryopreservation. A total of ten protein bands in the molecular weight ranging from 17 to 180 kDa were found in the SDS-PAGE of seminal plasma proteins, while nine bands of 17-134 kDa were observed in sperm proteins. Seminal plasma proteins of molecular weight 75, 62-49, 20, and 17 kDa and sperm proteins of 75, 20, and 17 kDa were present in all the nine bucks (100%) screened, and variation among the bucks was noticed for the presence of other proteins. Seminal plasma protein of 180-134 kDa showed a negative correlation with individual motility (−0.716) and functional membrane integrity of sperm cells (−0.724) in post-freeze–thaw analysis and 48 kDa protein had a positive correlation with individual motility (0.649) and functional membrane integrity of sperm cells (0.664) in post-thaw analysis. Sperm proteins of 63 kDa had a negative correlation (−0.616) with sperm concentration in neat semen. Conclusion: Variation among the bucks was noticed in the in vitro sperm characters and semen freezability. Correlation between seminal proteins and in vitro sperm characters and semen freezability had been found which might be useful as a tool to select breeding bucks.
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Affiliation(s)
- M Karunakaran
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - Vivek C Gajare
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - Ajoy Mandal
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - Mohan Mondal
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - S K Das
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - M K Ghosh
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - S Rai
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
| | - R Behera
- ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, India
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Mukhopadhyay S, Debgupta J, Singh C, Sarkar R, Basu O, Das SK. Designing UiO-66-Based Superprotonic Conductor with the Highest Metal-Organic Framework Based Proton Conductivity. ACS Appl Mater Interfaces 2019; 11:13423-13432. [PMID: 30888148 DOI: 10.1021/acsami.9b01121] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Metal-organic framework (MOF) based proton conductors have received immense importance recently. The present study endeavors to design two post synthetically modified UiO-66-based MOFs and examines the effects of their structural differences on their proton conductivity. UiO-66-NH2 is modified by reaction with sultones to prepare two homologous compounds, that is, PSM 1 and PSM 2, with SO3H functionalization in comparable extent (Zr:S = 2:1) in both. However, the pendant alkyl chain holding the -SO3H group is of different length. PSM 2 has longer alkyl chain attachment than PSM 1. This difference in the length of side arms results in a huge difference in proton conductivity of the two compounds. PSM 1 is observed to have the highest MOF-based proton conductivity (1.64 × 10-1 S cm-1) at 80 °C, which is comparable to commercially available Nafion, while PSM 2 shows significantly lower conductivity (4.6 × 10-3 S cm-1). Again, the activation energy for proton conduction is one of the lowest among all MOF-based proton conductors in the case of PSM 1, while PSM 2 requires larger activation energy (almost 3 times). This profound effect of variation of the chain length of the side arm by one carbon atom in the case of PSM 1 and PSM 2 was rather surprising and never documented before. This effect of the length of the side arm can be very useful to understand the proton conduction mechanism of MOF-based compounds and also to design better proton conductors. Besides, PSM 1 showed proton conductivity as high as 1.64 × 10-1 S cm-1 at 80 °C, which is the highest reported value to date among all MOF-based systems. The lability of the -SO3H proton of the post synthetically modified UiO-66 MOFs has theoretically been determined by molecular electrostatic potential analysis and theoretical p Ka calculation of models of functional sites along with relevant NBO analyses.
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Affiliation(s)
| | - Joyashish Debgupta
- School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
| | - Chandani Singh
- School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
| | - Rudraditya Sarkar
- School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
| | - Olivia Basu
- School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
| | - Samar K Das
- School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
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Bolligarla R, Durgaprasad G, Das SK. Coordination polymers from dithiolato complexes and alkali metal cations: How a crystallizing and coordinating solvent influences the dimensionality. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.041] [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: 10/28/2022]
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Abstract
A fully reduced polyoxovanadate compound [Na6(H2O)24][H8VIV15O36(CO3)]·3N2H4·10H2O (1) with CO32− encapsulation in its internal cavity (from dissolved aerial CO2 in the synthesis reaction mixture) is reported. Compound 1 crystals, on exposure of HCl vapor, excludes carbonate as a CO2 gas that can be reacted with a Grignard reagent to produce triphenylcarbinol as a major product.
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Affiliation(s)
- Sateesh Mulkapuri
- School of Chemistry
- University of Hyderabad
- P.O. Central University
- Hyderabad – 500046
- India
| | - Sathish Kumar Kurapati
- School of Chemistry
- University of Hyderabad
- P.O. Central University
- Hyderabad – 500046
- India
| | - Samar K. Das
- School of Chemistry
- University of Hyderabad
- P.O. Central University
- Hyderabad – 500046
- India
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Mulkapuri S, Kurapati SK, Mukhopadhyay S, Das SK. A fully reduced {VIV18O42} host and VO43−, Cl− as guest anions: synthesis, characterization and proton conductivity. NEW J CHEM 2019. [DOI: 10.1039/c9nj01918a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Two polyoxovanadate compounds, [Na7(H2O)14][H8VIV18O42(VVO4)]·N2H4·7H2O and [Na5(H2O)16][H8VIV18O42(Cl)]·4N2H4·6H2O, each having fully reduced host cage and accommodating eight acidic protons per formula unit, exhibit moderate proton conductivity.
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Affiliation(s)
| | | | | | - Samar K. Das
- School of Chemistry
- University of Hyderabad
- Hyderabad – 500046
- India
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Bommakanti S, Das SK. A quantitative transmetalation with a metal organic framework compound in a solid–liquid interface reaction: synthesis, structure, kinetics, spectroscopy and electrochemistry. CrystEngComm 2019. [DOI: 10.1039/c9ce00021f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A Zn(ii)-MOF (1) can be transformed to its isomorphous Cu(ii)-MOF (2) quantitatively in a single crystal to single crystal metal exchange process in a solid–liquid interface reaction.
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Affiliation(s)
| | - Samar K. Das
- School of Chemistry
- University of Hyderabad
- Hyderabad 500046
- India
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Abstract
A series of decavanadate based compounds, formulated as [Co(H2O)6][{Na4(H2O)14}{V10O28}]·4H2O (1), [Zn(H2O)6][Na3(H2O)14] [HV10O28]·4H2O (2), [HMTAH]2 [{Zn(H2O)4}2{V10O28}]·2H2O (3), [{Co(3-amp)(H2O)5}]2 [3-ampH]2 [V10O28] · 6H2O (4), [4-ampH]10[{Na(H2O)6}{HV10O28}][V10O28]·15H2O (5), [{4-ampH}6 {Co(H2O)6}3][V10O28]2·14H2O (6), and [{4-ampH}10{Zn(H2O)6}][V10O28]2·10H2O (7), have been synthesized (where HMTAH = mono-protonated hexamethylenetetramine, 3-ampH = protonated 3-amino pyridine and 4-ampH= protonated 4-aminopyridine) from the relevant aqueous sodium-vanadate solution, by varying the pH of the solution and amino pyridine/hexamine derivatives as well as transition metal salts (Co(II)- and Zn(II)-salts). In this series of compounds 1-7, the polyoxovanadate (POV) cluster [V10O28]6- is the common cluster anion, stabilized by diverse cations. The diverse supramolecular patterns around the decavanadate cluster anion in different cationic matrices have been described to understand the microenvironment in the decavanadate-based minerals. All of these compounds have solvent water molecules in their respective crystal lattices. Since water can interact directly with cations and anions, providing an additional stability and structural diversity, we have analyzed supramolecular water structures in all these compounds to comprehend the role of the lattice water in the formation of natural decavanadate containing minerals. Compounds 1-7, that are isolated at an ambient condition from aqueous solution, are characterized by routine spectral analysis, elemental analyses and finally unambiguously by single crystal X-ray crystallography.
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Affiliation(s)
| | - Samar K Das
- School of Chemistry, University of Hyderabad, Central University, Hyderabad, India
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Manna P, Ramathulasamma M, Bommakanti S, Das SK. Metallo-macrocycles from a library of flexible linkers: 1D cobalt(II) coordination polymers and a supramolecular pipe. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.047] [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: 11/16/2022]
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Cohen AT, Phillips MJ, Edmondson RA, Skinner JA, Das SK, Cooper DJ, Thomas EM, Melissari E, Kakkar VV. A Dose Ranging Study to Evaluate Dermatan Sulphate in Preventing Deep Vein Thrombosis following Total Hip Arthroplasty. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1648963] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryDermatan sulphate catalyses thrombin inhibition by heparin cofactor II; it has a lower haemorrhagic to antithrombotic ratio than that of heparin in animal models. Consecutive patients aged forty years or more, electively undergoing total hip replacement under general anaesthesia, were randomly allocated to one of three dosage regimens of dermatan sulphate (MF701, Mediolanum Farmaceutici) given intramuscularly. These were 200 mg once daily (n = 50), 200 mg twice daily (n = 52) and 300 mg twice daily (n = 51), administered from twenty-four hours pre-operatively until the tenth postoperative day. The overall incidence of DVT assessed by bilateral venography was 53%, 51% and 34% respectively (Chi-square test for trend p = 0.06). The incidence of major proximal DVT was 10.6%, 8.5% and 2.1% respectively. Pulmonary embolism (PE) and bleeding were assessed in all 153 patients. There was one case of PE in each dose group. The incidence of bleeding episodes, volume of blood lost and blood transfusion requirements were low and showed no increase with increasing dose. The patients were followed up 4-8 weeks after discharge.We conclude that the two lower doses were subtherapeutic in this population, however dermatan sulphate given 300 mg twice daily, proved to be efficacious with an incidence of proximal major DVT of 2.1% and a low incidence of bleeding complications. A trial of dermatan sulphate 300 mg twice daily compared to standard prophylactic agents is needed.
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Affiliation(s)
- A T Cohen
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - M J Phillips
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - R A Edmondson
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - J A Skinner
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - S K Das
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - D J Cooper
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - E M Thomas
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - E Melissari
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
| | - V V Kakkar
- The Thrombosis Research Institute, Emmanuel Kaye Building, London, UK
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Asadujjaman M, Kashem A, Chowdhury AA, Roy AS, Muqueet MA, Fazilatunnasa M, Ahammed SU, Rabbani MG, Rahman MA, Kabir MS, Hossain MB, Islam MS, Das SK, Khan EH, Borman GC, Khatun N. Prevalence of Microalbuminuria and Overt Proteinuria in Diabetes Mellitus and their Association with Renal Function. Mymensingh Med J 2018; 27:467-474. [PMID: 30141433] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This cross sectional observational study was conducted in the Department of Nephrology, Mymensingh Medical College Hospital, Mymensingh, Bangladesh from April 2009 to March 2010. Samples were collectedfrom rural area of Khalishaur union of Purbadhala upazilla in Netrakona District, 30km away from Mymensingh Town. The main objective of the study was to find out the prevalence of microalbuminuria as well as overt proteinuria in diabetes mellitus in a rural population and to observe their association with renal function. In this study 1048 adult participants of 18 to 65 years in a rural area of Netrakona were included purposively as study subjects. Among them 54% were male and 46% were female. Mean age of study subjects was 42.4±13.4 years. Prevalence of microalbuminuria among diabetic participants was 29.72% where as in non diabetic non hypertensive participants it was 6.62%. Diabetic persons 9.45% and 3.9% of non diabetic participants showed overt proteinuria by dipstick test. Prevalence of hypertension in diabetic and non diabetic participants was 45.94% and 16.52% respectively. The mean eCCr of the diabetic patients and non-microalbuminuric healthy persons was 78.4±25.4 ml/min/1.73m² and 94.67±24.8 ml/min/l.73m² respectively according to Cock Croft-Gault equation. The mean eCCr of diabetic participants with overt proteinuria was 57.44±28.33 ml/min/l.73m² but diabetic patients with microalbuminuria had better mean eCCr 80.62±21.17 ml/min/1.73m² which justifies the importance of detection of microalbuminuria for early intervention. By regression analysis it was found that degree of microalbuminuria had linear relation with renal function and random blood sugar level. Neither BMI nor duration of diabetes showed any correlation with urine microalbumin. There was no effect of sex on the prevalence of microalbuminuria in diabetes mellitus. Microalbuminuria is the first sign of renal involvement in diabetic patients which is a risk factor for overt nephropathy. Monitoring of this condition is important because early treatment of microalbuminuria can prevent or postpone overt nephropathy.
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Affiliation(s)
- M Asadujjaman
- Dr Mohammad Asadujjaman, Assiostant Professor, Department of Nephrology, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Singh C, Mukhopadhyay S, Das SK. Polyoxometalate-Supported Bis(2,2′-bipyridine)mono(aqua)nickel(II) Coordination Complex: an Efficient Electrocatalyst for Water Oxidation. Inorg Chem 2018; 57:6479-6490. [DOI: 10.1021/acs.inorgchem.8b00541] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Chandani Singh
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India
| | | | - Samar K. Das
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India
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Naik I, Bodapati R, Sarkar R, Mondal N, Das SK. Functional Molecular System of Bis(pyrazolyl)pyridine Derivatives: Photophysics, Spectroscopy, Computation, and Ion Sensing. ACS Omega 2018; 3:3022-3035. [PMID: 31458568 PMCID: PMC6641288 DOI: 10.1021/acsomega.7b02006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 02/20/2018] [Indexed: 06/10/2023]
Abstract
A new series of conjugated donor-π-acceptor type of 2,6-bis(pyrazolyl)pyridine derivatives (compounds IK-(3-9)) have been synthesized via Horner-Wadsworth-Emmons (HWE) reaction, starting from a common phosphonate precursor and diverse donor aromatic aldehydes and characterized by routine spectral analysis including elemental analysis. Compound IK-2, one of the starting precursors, and molecule IK-3, the first member of the donor-π-acceptor series, are additionally characterized by single-crystal X-ray structure determination. Compounds IK-2 and IK-3 are crystallized in P1̅ (triclinic) and P21/c (monoclinic) space groups, respectively. The absorption maxima in the electronic spectra of the title compounds shift mainly due to intramolecular charge transfer (ICT) between different donor (dibutyl and cyclic pyrrolidine) groups and the acceptor moiety [2,6-bis(pyrazolyl) pyridine]. Solution-state emission spectral studies of all these compounds show large solvent sensitive behavior with significant amounts of Stokes shifts. The large solvent dependence of the emission indicates that the excited state is stabilized in more polar solvents due to the ICT. All chromophores exhibit solid-state fluorescence behavior except compound IK-7. The role of the position and nature of the donor functionalities in the conjugated backbone of overall donor moiety of compounds IK-(3-9), on the electronic absorption properties of the title chromophores has been demonstrated, which has further been corroborated by density functional theory (DFT) and time-dependent DFT (TDDFT) computational studies. The emission spectral results of compounds IK-3, IK-5, and IK-7 have also been supported by the DFT and TDDFT calculations. A fluorescence lifetime study on this series also shows that the excited states are stabilized in more polar solvents. Finally, one of the chromophores (chromophore IK-4) in the title series has been shown to act as a selective molecular sensor (turn-off switch) for the Cu(II) ion.
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Devi LB, Bora DP, Das SK, Sharma RK, Mukherjee S, Hazarika RA. Virulence gene profiling of porcine Pasteurella multocida isolates of Assam. Vet World 2018; 11:348-354. [PMID: 29657428 PMCID: PMC5891851 DOI: 10.14202/vetworld.2018.348-354] [Citation(s) in RCA: 13] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 02/19/2018] [Indexed: 11/21/2022] Open
Abstract
Aim: The present study was conducted to detect and identify the virulence genes in Pasteurella multocida isolates of porcine origin from Assam. Materials and Methods: A total of 21 porcine P. multocida isolates were subjected to capsular typing and detection of virulence-associated genes (pfhA, tbpA, hgbB, toxA, oma87, ompH, and nanB) using various polymerase chain reaction (PCR) methods reported elsewhere. Further, pathogenicity of the porcine isolates of P. multocida was studied in mice. For each strain of P. multocida selected for pathogenicity trial, the group of mice was injected intraperitoneally (i/p) with 0.1 ml of the inoculum prepared from respective field isolates, containing 109 organisms per ml. Results: Capsular typing of the isolates by multiplex PCR showed two capsular types, type A (66.66%) and type D (33.33%). All the isolates were positive for outer membrane protein genes, oma87 and ompH genes. Iron acquisition genes, tbpA and hgbB, were detected in 14.28% and 19.04% of the isolates. The dermonecrotoxin encoding gene, toxA, was present in 23.80% of the isolates. Filamentous hemagglutinin encoding gene, pfhA, was detected in 28.57%. The virulence gene distribution pattern of the isolates indicates the important role of the genes in disease pathogenesis. Conclusion: From the present study, it can be concluded that toxA gene is an important marker gene for defining the pathogenic potential of P. multocida strains in swine.
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Affiliation(s)
- L Babita Devi
- KVK Churachandpur, ICAR Manipur Centre, Imphal, Manipur, India.,Department of Microbiology, College of Veterinary Science, AAU, Khanapara, Guwahati - 781 022, Assam, India
| | - Durlav Prasad Bora
- Department of Microbiology, College of Veterinary Science, AAU, Khanapara, Guwahati - 781 022, Assam, India
| | - S K Das
- Department of Microbiology, College of Veterinary Science, AAU, Khanapara, Guwahati - 781 022, Assam, India
| | - R K Sharma
- Department of Microbiology, College of Veterinary Science, AAU, Khanapara, Guwahati - 781 022, Assam, India
| | - S Mukherjee
- Department of Veterinary Epidemiology and Preventive Medicine, CVSc, CAU, Aizawl, Mizoram, India
| | - R A Hazarika
- Department of Veterinary Public Health, College of Veterinary Science, AAU, Khanapara, Guwahati - 781 022, Assam, India
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Mukhopadhyay S, Debgupta J, Singh C, Kar A, Das SK. A Keggin Polyoxometalate Shows Water Oxidation Activity at Neutral pH: POM@ZIF-8, an Efficient and Robust Electrocatalyst. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711920] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | - Aranya Kar
- School of Chemistry; University of Hyderabad; India
| | - Samar K. Das
- School of Chemistry; University of Hyderabad; India
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48
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Mukhopadhyay S, Debgupta J, Singh C, Kar A, Das SK. A Keggin Polyoxometalate Shows Water Oxidation Activity at Neutral pH: POM@ZIF-8, an Efficient and Robust Electrocatalyst. Angew Chem Int Ed Engl 2018; 57:1918-1923. [DOI: 10.1002/anie.201711920] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | - Aranya Kar
- School of Chemistry; University of Hyderabad; India
| | - Samar K. Das
- School of Chemistry; University of Hyderabad; India
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49
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Rahman MA, Roy DK, Debnath CR, Roy AS, Muqueet MA, Kabir MS, Ahammed SU, Rabbani MG, Asadujjaman M, Hossain MB, Islam MA, Ray NC, Borman GC, Islam MS, Das SK, Khan EH, Ara J. Acute Kidney Injury in Patients with Acute Viral Hepatitis: A Study in a Tertiary Care Hospital. Mymensingh Med J 2017; 26:790-796. [PMID: 29208866] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This cross sectional observational study was done in the Department of Medicine, Mymensingh Medical College Hospital (MMCH), Mymensingh, Bangladesh from May 2013 to April 2014 to find out the proportion of acute kidney injury among patients with acute viral hepatitis and to identify risk factors associated with development of acute kidney injury (AKI). A total of 100 patients with acute viral hepatitis were included purposively as study subjects. Among them 61 were male and 39 were female. They were divided into AKI group (n=6) and non-AKI group (n=94) on the basis of development of AKI. There was no significant difference in mean age (39.0±13.1 years vs. 32.2±10.8 years, p=0.335) and sex (67% vs. 61% & 33.0% vs. 39.0%) p=0.769) between AKI group and non-AKI group. There were 27% acute viral hepatitis A, 21% acute viral hepatitis B and 52% acute viral hepatitis E but no case of acute viral hepatitis C was found in this study. Acute kidney injury (AKI) developed in 6 of 27 patients with acute viral hepatitis A. This study showed that 22.2% patients with acute viral hepatitis A developed acute kidney injury but patients with acute viral hepatitis B (HBV) and hepatitis E (HEV) did not develop acute kidney injury. Majority of the patients with acute kidney injury were smokers and hypertensive with elevated mean arterial pressure (p=0.0001) at presentation and had higher total bilirubin (p=0.0001), alanine aminotranseferase values (p=0.040), prolonged prothrombin time (INR) {p=0.0001}, lower albumin (p=0.0001), lower haematocrit level (p=0.0001), high CRP concentration (p=0.0001), leucocytosis (p=0.0001) and thrombocytopenia (p=0.0001) at presentation than patients without acute kidney injury. It is evident from the study that acute kidney injury is not a rare complication in patients with acute viral hepatitis.
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Affiliation(s)
- M A Rahman
- Dr Md Anisur Rahman, Assistant Professor, Department of Nephrology, Sheikh Hasina Medical College, Tangail
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