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Chakraborty A, Rajana VK, Saritha C, Srivastava A, Mandal D, Das N. A new Eosin Y-based 'turnon' fluorescent sensor for ratiometric sensing of toxic mercury ion (Hg 2+) offering unaided eye detection and its antibacterial activity. J Hazard Mater 2024; 470:134207. [PMID: 38593667 DOI: 10.1016/j.jhazmat.2024.134207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/01/2024] [Accepted: 04/02/2024] [Indexed: 04/11/2024]
Abstract
A unique fluorescent molecule (ND-S) was obtained from Eosin Y in two simple yet high yielding steps (1). ND-S has special metal ion sensing ability, such that it can selectively detect toxic Hg2+ present in very low concentration in aqueous solutions in the presence of other competing metal ions. The host-guest complexation is ratiometric and is associated with significant increase in fluorescence during the process. Isothermal titration calorimetry (ITC) experiments provided thermodynamic parameters related to interaction between ND-S and Hg2+. Using inductively coupled plasma mass spectrometry (ICP-MS), the Hg2+(aq) removal efficiency of ND-S was estimated to be 99.88%. Appreciable limit of detection (LOD = 7.4 nM) was observed. Other competing ions did not interfere with the sensing of Hg2+ by ND-S. The effects of external stimuli (temperature and pH) were studied. Besides, the complex (ND-M), formed by 1:1 coordination of ND-S and Hg2+ was found to be effective against the survival of Gram-positive bacteria (S. aureus and B. subtilis) with a high selectivity index. Moreover, bacterial cell death mechanism was studied systematically. Overall, we have shown the transformation of a toxic species (Hg2+), extracted from polluted water by a biocompatible sensor (ND-S), into an effective and potent antibacterial agent (ND-M).
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Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, Bihar, India
| | - Vinod K Rajana
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research Hajipur, 844102 Bihar, India
| | - Cevella Saritha
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research Hajipur, 844102 Bihar, India
| | - Abhinav Srivastava
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, Bihar, India
| | - Debabrata Mandal
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research Hajipur, 844102 Bihar, India
| | - Neeladri Das
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, Bihar, India.
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Chakraborty A, Kamat SS. Lysophosphatidylserine: A Signaling Lipid with Implications in Human Diseases. Chem Rev 2024. [PMID: 38607675 DOI: 10.1021/acs.chemrev.3c00701] [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: 04/14/2024]
Abstract
Lysophosphatidylserine (lyso-PS) has emerged as yet another important signaling lysophospholipid in mammals, and deregulation in its metabolism has been directly linked to an array of human autoimmune and neurological disorders. It has an indispensable role in several biological processes in humans, and therefore, cellular concentrations of lyso-PS are tightly regulated to ensure optimal signaling and functioning in physiological settings. Given its biological importance, the past two decades have seen an explosion in the available literature toward our understanding of diverse aspects of lyso-PS metabolism and signaling and its association with human diseases. In this Review, we aim to comprehensively summarize different aspects of lyso-PS, such as its structure, biodistribution, chemical synthesis, and SAR studies with some synthetic analogs. From a biochemical perspective, we provide an exhaustive coverage of the diverse biological activities modulated by lyso-PSs, such as its metabolism and the receptors that respond to them in humans. We also briefly discuss the human diseases associated with aberrant lyso-PS metabolism and signaling and posit some future directions that may advance our understanding of lyso-PS-mediated mammalian physiology.
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Affiliation(s)
- Arnab Chakraborty
- Department of Biology, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
| | - Siddhesh S Kamat
- Department of Biology, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
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Chaudhury R, Chakraborty A, Rahaman F, Sarkar T, Dey S, Das M. Mycorrhization in trees: ecology, physiology, emerging technologies and beyond. Plant Biol (Stuttg) 2024; 26:145-156. [PMID: 38194349 DOI: 10.1111/plb.13613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 11/30/2023] [Indexed: 01/10/2024]
Abstract
Mycorrhization has been an integral part of plants since colonization by the early land plants. Over decades, substantial research has highlighted its potential role in improving nutritional efficiency and growth, development and survival of crop plants. However, the focus of this review is trees. Evidence have been provided to explain ecological and physiological significance of mycorrhization in trees. Advances in recent technologies (e.g., metagenomics, artificial intelligence, machine learning, agricultural drones) may open new windows to apply this knowledge in promoting tree growth in forest ecosystems. Dual mycorrhization relationships in trees and even triple relationships among trees, mycorrhizal fungi and bacteria offer an interesting physiological system to understand how plants interact with other organisms for better survival. Besides, studies indicate additional roles of mycorrhization in learning, memorizing and communication between host trees through a common mycorrhizal network (CMN). Recent observations in trees suggest that mycorrhization may even promote tolerance to multiple abiotic (e.g., drought, salt, heavy metal stress) and biotic (e.g. fungi) stresses. Due to the extent of physiological reliance, local adaptation of trees is heavily impacted by the mycorrhizal community. This knowledge opens the possibility of a non-GMO avenue to promote tree growth and development. Indeed, mycorrhization could impact growth of trees in nurserys and subsequent survival of the inoculated trees in field conditions. Future studies might integrate hyperspectral imaging and drone technologies to identify tree communities that are deficient in nitrogen and spray mycorrhizal spore formulations on them.
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Affiliation(s)
- R Chaudhury
- Department of Life Sciences, Presidency University, Kolkata, India
| | - A Chakraborty
- Department of Life Sciences, Presidency University, Kolkata, India
| | - F Rahaman
- Department of Life Sciences, Presidency University, Kolkata, India
| | - T Sarkar
- Department of Life Sciences, Presidency University, Kolkata, India
| | - S Dey
- Department of Life Sciences, Presidency University, Kolkata, India
| | - M Das
- Department of Life Sciences, Presidency University, Kolkata, India
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Talwadekar M, Khatri S, Balaji C, Chakraborty A, Basak NP, Kamat SS, Kolthur-Seetharam U. Metabolic transitions regulate global protein fatty acylation. J Biol Chem 2024; 300:105563. [PMID: 38101568 PMCID: PMC10808961 DOI: 10.1016/j.jbc.2023.105563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/17/2023] Open
Abstract
Intermediary metabolites and flux through various pathways have emerged as key determinants of post-translational modifications. Independently, dynamic fluctuations in their concentrations are known to drive cellular energetics in a bi-directional manner. Notably, intracellular fatty acid pools that drastically change during fed and fasted states act as precursors for both ATP production and fatty acylation of proteins. Protein fatty acylation is well regarded for its role in regulating structure and functions of diverse proteins; however, the effect of intracellular concentrations of fatty acids on protein modification is less understood. In this regard, we unequivocally demonstrate that metabolic contexts, viz. fed and fasted states, dictate the extent of global fatty acylation. Moreover, we show that presence or absence of glucose that influences cellular and mitochondrial uptake/utilization of fatty acids and affects palmitoylation and oleoylation, which is consistent with their intracellular abundance in fed and fasted states. Employing complementary approaches including click-chemistry, lipidomics, and imaging, we show the top-down control of cellular metabolic state. Importantly, our results establish the crucial role of mitochondria and retrograde signaling components like SIRT4, AMPK, and mTOR in orchestrating protein fatty acylation at a whole cell level. Specifically, pharmacogenetic perturbations that alter either mitochondrial functions and/or retrograde signaling affect protein fatty acylation. Besides illustrating the cross-talk between carbohydrate and lipid metabolism in mediating bulk post-translational modification, our findings also highlight the involvement of mitochondrial energetics.
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Affiliation(s)
- Manasi Talwadekar
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
| | - Subhash Khatri
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
| | - Chinthapalli Balaji
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
| | - Arnab Chakraborty
- Department of Biology, Indian Institute of Science Education and Research, Pune, India
| | - Nandini-Pal Basak
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
| | - Siddhesh S Kamat
- Department of Biology, Indian Institute of Science Education and Research, Pune, India.
| | - Ullas Kolthur-Seetharam
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India; Tata Institute of Fundamental Research, Hyderabad, India.
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Arora V, Yadav V, Aggarwal M, Mandal G, Chakraborty A, Dewan AK, Kamboj M. Collision Tumour of Combined Neuroendocrine and Squamous Cell Carcinoma of Nasal Cavity and Paranasal Sinus- Case Report and Review of Literature. Indian J Otolaryngol Head Neck Surg 2023; 75:3765-3769. [PMID: 37974826 PMCID: PMC10646142 DOI: 10.1007/s12070-023-04101-9] [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: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 11/19/2023] Open
Abstract
Background There have been many disputes about the definition, diagnosis, therapy, and prognosis of collision tumours. Case Summary We describe a rare patient with a collision tumour consisting of high-grade neuroendocrine carcinoma (NEC) and squamous cell carcinoma (SCC) in the right nasal cavity and paranasal sinus. She received surgery, concurrent chemoradiotherapy, and then two cycles of palliative chemotherapy. Follow-up at 26 months after diagnosis showed that this patient experienced a complete response with no signs of recurrence or metastasis. A literature review of previous 27 cases diagnosed with collision tumour of NEC and SCC in the head and neck was also undertaken. Conclusion It is highly challenging to manage collision tumours because these are two morphologically and etiologically distinct tumours. Well-designed multimodality therapy including surgery and chemoradiotherapy might lead to a long survival in these patients.
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Affiliation(s)
- Vikas Arora
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Vishal Yadav
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Manisha Aggarwal
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Ghanashyam Mandal
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Arnab Chakraborty
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - A K Dewan
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Meenakshi Kamboj
- Department of Patho Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
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Arora V, Chakraborty A, Lahiri A, Aggarwal M, Yadav V, Dewan AK. A Case of Myoepithelioma of Nasal Cavity and Short Review of Literature. Indian J Otolaryngol Head Neck Surg 2023; 75:2890-2894. [PMID: 37974825 PMCID: PMC10645747 DOI: 10.1007/s12070-023-03852-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 05/03/2023] [Indexed: 11/19/2023] Open
Abstract
Introduction: Myoepithelioma is a rare neoplasm of the salivary glands and accounts for less than 1% of salivary gland neoplasms. Only 7 cases of myoepithelioma in the nasal cavity have been reported till date in literature. Case Report: A 61 year old male presented to us with epistaxis. There was a pinkish fleshy mass occupying the right nasal cavity. Biopsy showed evidence of an epithelial tumor of intermediate aggressiveness. We did an endoscopic complete excision of nasal cavity mass. Histopathological examination of the resected tumor was consistent with myoepithelioma. Due to its rarity, the nature of the tumor is not known and regular follow-ups are needed for early detection of recurrence and malignancy. There has been no evidence of tumor recurrence in the 18 months following surgery.
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Affiliation(s)
- Vikas Arora
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Arnab Chakraborty
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Anupam Lahiri
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Manisha Aggarwal
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Vishal Yadav
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Ajay kumar Dewan
- Department of Head and Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
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Chakraborty A, Khanna A, Vasudeo V, Pratihar SK, Singh A, Rawal S. Enzalutamide-Induced Acute Maculopapular Rash in Treatment of Metastatic Prostate Cancer: First Case Report from a Tertiary Cancer Care Center of North India. Indian J Surg Oncol 2023; 14:571-575. [PMID: 37900659 PMCID: PMC10611630 DOI: 10.1007/s13193-023-01719-7] [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: 01/11/2023] [Accepted: 02/10/2023] [Indexed: 02/19/2023] Open
Abstract
Enzalutamide is a new potent inhibitor of the signaling pathway for the androgen receptor with a half-life of 5.8 days. It has been on the market for the treatment of metastatic castration-resistant prostate cancer since November 2013. We report a case of acute generalized exanthematous maculopapular rash induced by enzalutamide. In summary, newer androgen receptor blockers have a propensity to cause skin related adverse effects. Most common among these are apalutamide. Enzalumatamide, per se, is a safe drug and has not been associated frequently in causing maculopapular rash. Few cases has been reported. In all these cases, the drug was discontinued and 2nd line therapy was instituted. In this report, Enzalutamide was withheld for 10 days and anti-histaminics was instituted. After a full recovery, Enzalutamide was reinstituted in treatment. A 62-year-old male patient with no significant medical history, was diagnosed in March 2020 with metastatic prostatic adenocarcinoma. Baseline PSA was 456 ng/ml. PSMA PET scan showed evidence of multiple bony metastasis. He was started on Degarelix subcutaneous injection with oral abiraterone initially. PSA level showed initial decreasing trend till September 2021 followed by sudden increase. Intramuscular Injection leuprolide was started and initial responses were good followed by later rise of PSA from January. Tab Xtandi (Enzalutamide) was added to the regimen from 31.1.22. Three days after starting enzalutamide treatment, the patient experienced an acute skin reaction. It is about of the plaques covered with widespread millimetric non-follicular papules. Enzalutamide was stopped after appearance of rashes to avoid further serious adverse effects. Anti-histaminics were started. Complete resolution of skin lesions occurred within 10 days. Tab Enzalutamide was reinstituted on 11th day after stoppage and on complete resolution of skin resolutions. According to the CTCAE 5.0 criteria, these skin rash was graded as grade 2. In view of evidence in literature and clinical improvement after stoppage, the acute drug reaction was attributed to enzalutamide. Uro oncologist can be confronted with adverse skin drug reactions attributable to new therapeutic molecules. The slow resolution of symptoms seems be due to the long half-life of enzalutamide. It should not be withdrawn from therapy owing to these effects. Rather, it should be with stopped for 10-14 days. Basic treatment with anti-histaminics or topical steroids may be enough to warranty the resolution of symptoms, and the drug (Enzalutamide) can be continued thereafter.
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Affiliation(s)
- Arnab Chakraborty
- Department of Genito Urinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
- Department of Surgical Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Ashish Khanna
- Department of Genito Urinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Vivek Vasudeo
- Department of Genito Urinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Sarbartha Kumar Pratihar
- Department of Genito Urinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Amitabh Singh
- Department of Genito Urinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Sudhir Rawal
- Department of Genito Urinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
- Genitourinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
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Pratihar SK, Khanna A, Chakraborty A, Vasudeo V, Saurabh N, Kumar B, Ali M, Singh A, Rawal SK. Cutaneous Radiation-Associated Angiosarcoma After Treatment of Carcinoma Penis: First Report from Tertiary Cancer Centre of North India. Indian J Surg Oncol 2023; 14:556-560. [PMID: 37900658 PMCID: PMC10611641 DOI: 10.1007/s13193-023-01766-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 04/29/2023] [Indexed: 10/31/2023] Open
Abstract
Cutaneous radiation-associated angiosarcoma (cRAA) is a rare and aggressive secondary cutaneous angiosarcoma (cAS) with poor survival. cRAA has been mostly reported in breast carcinoma patients. Owing to its rarity, there is scanty literature available and no treatment guidelines. To the best of our knowledge, this is the first report of cRAA after multimodality treatment of carcinoma penis. A sixty-eight-year-old gentleman, a known case of carcinoma penis, underwent total penectomy with perineal urethrostomy and bilateral radical inguinopelvic lymph node dissection 6 years ago. He received adjuvant radiotherapy to the pelvis and bilateral groin. He presented with a bleeding plaque-like lesion with ulceration over the left lower abdomen (within previous radiation field) which rapidly progressed in size over the past 2 months. On examination, the lesion bled profusely on touch. Contrast MRI was suggestive of lobulated exophytic enhancing cutaneous lesion free from underlying muscle. Wedge biopsy was suggestive of cutaneous angiosarcoma. He underwent wide local excision with local perforator flap reconstruction from the right lower abdomen. Histopathology was suggestive of cutaneous angiosarcoma which showed immunoexpression of CD31, ERG1, cMYC suggestive of cRAA. cRAA is a very aggressive disease with 5-year survival of 15-34%. To the best of our knowledge, this is the first ever reported case of cRAA of lower abdomen after multimodality management of carcinoma penis. It masquerades with other benign and less aggressive radiation-induced skin lesions. cMYC immunoexpression is specific for secondary cAS. Wide local resection with negative margin provides the best outcome.
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Affiliation(s)
- Sarbartha Kumar Pratihar
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Ashish Khanna
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Arnab Chakraborty
- Department of Surgical Oncology, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, India
| | - Vivek Vasudeo
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Nikhil Saurabh
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Bhuwan Kumar
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Mujahid Ali
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Amitabh Singh
- Department of Urooncology and Robotic surgery, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, 110085 India
| | - Sudhir Kumar Rawal
- Medical Director and Chief Genitourinary Oncology, Rajiv Gandhi Cancer Institute and Research Centre, Sector 5 Rohini, New Delhi, India
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Yadav V, Arora V, Chakraborty A, Lahiri A, Aggarwal M, Dewan AK. Extremely Rare Case of Extra Skeletal Soft Tissue Chondroma of Masseteric Space: a Diagnostic Challengel. Indian J Otolaryngol Head Neck Surg 2023; 75:2367-2372. [PMID: 37636799 PMCID: PMC10447691 DOI: 10.1007/s12070-023-03705-5] [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: 03/09/2023] [Accepted: 03/16/2023] [Indexed: 03/29/2023] Open
Abstract
Benign soft tissue chondroma is a rare type of extraskeletal chondrocytic tumour. It usually can be found in skeletal system in extremities. Head and neck region is one of the most uncommon sites for extraskeletal chondroma .Most common site is tongue and there has been paucity of cases arising from the other subsites .We present a case of 56 years gentleman who came to our OPD with a right masticator space swelling. It was nonmalignant on FNAC. He underwent wide local excision through a transparotid approach. Final biopsy & IHC report showed presence of benign chondrocytic neoplasm- soft tissue chondroma (extraskeletal). No further therapy was used and he has been in follow up since then. To our knowledge ,this is the third reported case of masseteric space chondroma. Supplementary Information The online version contains supplementary material available at 10.1007/s12070-023-03705-5.
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Affiliation(s)
- Vishal Yadav
- Department of Head Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Vikas Arora
- Department of Head Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Arnab Chakraborty
- Department of Head Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Anupam Lahiri
- Department of Head Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Manisha Aggarwal
- Department of Head Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
| | - Ajay kumar Dewan
- Department of Head Neck Oncology, Rajiv Gandhi Cancer Institute & Research Centre, New Delhi, 110085 India
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Ghosh R, León-Ruiz M, Dubey S, Chakraborty A, Benito-León J. Higher-level gait disorder as a presenting manifestation of progressive supranuclear palsy: a video case report. Rev Neurol 2023; 77:101-104. [PMID: 37489858 PMCID: PMC10662190 DOI: 10.33588/rn.7704.2022393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Indexed: 07/26/2023]
Abstract
INTRODUCTION Frontal gait disorder/gait apraxia is a higher-order motor deficit with various causes, characterized by difficulties with gait initiation, such as freezing or ignition failure. We aimed to report a patient who presented with progressive higher-level gait disorder and fall episodes as the initial manifestations of progressive supranuclear palsy (PSP). Patient data were obtained from medical records from the Department of General Medicine, Burdwan Medical College and Hospital (Burdwan, West Bengal, India). CASE REPORT A 58-year-old previously healthy woman presented with a gait disorder and fall episodes. Detailed neurological examination highlighted characteristic facial appearance (wide-eyed staring, furrowing of the forehead with a frowning expression, and fixed expression of the lower face). She was hypokinetic-rigid with symmetrical signs and predominant axial rigidity with retrocolic trunk and neck posture. Gait examination revealed a higher-level gait pattern characterized by an exhibition of profound start hesitation requiring assistance from nearby objects/persons. Once walking was underway, steps became relatively better, but ineffective gait re-emerged when she attempted turning. She had short strides, freezing, broad stance base, disequilibrium, slow leg movement, shuffling, and loss of normal fluidity of trunk and limbs. Postural reflexes were impaired. Brain magnetic resonance imaging revealed atrophy of the midbrain, dilated aqueduct of Sylvius and third ventricle, atrophy of frontal lobes and typical hummingbird sign. Diagnosis of probable PSP was finally made. CONCLUSIONS Several etiologies, including PSP, should be considered in appropriate clinical contexts if gait examination demonstrates a higher-order gait disorder.
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Affiliation(s)
- R Ghosh
- Burdwan Medical College and Hospital, Burdwan, India
| | - M León-Ruiz
- Hospital Universitario La Paz, Madrid, España
| | - S Dubey
- Institute of Post Graduate Medical Education and Research and SSKM Hospital , Kolkata, India
| | - A Chakraborty
- Institute of Post Graduate Medical Education and Research and SSKM Hospital , Kolkata, India
| | - J Benito-León
- Universidad Complutense de Madrid, Madrid, España
- Hospital Universitario 12 de Octubre, Madrid, España
- CIBERNED. Centro de Investigación Biomédica en Red Enfermedades Neurodegenerativas, Madrid, España
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Sen D, Maniyadath B, Chowdhury S, Kaur A, Khatri S, Chakraborty A, Mehendale N, Nadagouda S, Sandra U, Kamat SS, Kolthur-Seetharam U. Metabolic regulation of CTCF expression and chromatin association dictates starvation response in mice and flies. iScience 2023; 26:107128. [PMID: 37416476 PMCID: PMC10320512 DOI: 10.1016/j.isci.2023.107128] [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: 09/08/2022] [Revised: 05/16/2023] [Accepted: 06/10/2023] [Indexed: 07/08/2023] Open
Abstract
Coordinated temporal control of gene expression is essential for physiological homeostasis, especially during metabolic transitions. However, the interplay between chromatin architectural proteins and metabolism in regulating transcription is less understood. Here, we demonstrate a conserved bidirectional interplay between CTCF (CCCTC-binding factor) expression/function and metabolic inputs during feed-fast cycles. Our results indicate that its loci-specific functional diversity is associated with physiological plasticity in mouse hepatocytes. CTCF differential expression and long non-coding RNA-Jpx mediated changes in chromatin occupancy, unraveled its paradoxical yet tuneable functions, which are governed by metabolic inputs. We illustrate the key role of CTCF in controlling temporal cascade of transcriptional response, with effects on hepatic mitochondrial energetics and lipidome. Underscoring the evolutionary conservation of CTCF-dependent metabolic homeostasis, CTCF knockdown in flies abrogated starvation resistance. In summary, we demonstrate the interplay between CTCF and metabolic inputs that highlights the coupled plasticity of physiological responses and chromatin function.
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Affiliation(s)
- Devashish Sen
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
| | - Babukrishna Maniyadath
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
| | - Shreyam Chowdhury
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
| | - Arshdeep Kaur
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
| | - Subhash Khatri
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
| | - Arnab Chakraborty
- Department of Biology, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Neelay Mehendale
- Department of Biology, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Snigdha Nadagouda
- Tata Institute of Fundamental Research- Hyderabad (TIFR-H), Hyderabad, Telangana 500046, India
| | - U.S. Sandra
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
| | - Siddhesh S. Kamat
- Department of Biology, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Ullas Kolthur-Seetharam
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005, India
- Tata Institute of Fundamental Research- Hyderabad (TIFR-H), Hyderabad, Telangana 500046, India
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12
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Leshchev D, Valentine A, Kim P, Mills A, Chakraborty A, Biasin E, Haldrup K, Hsu D, Kirschner M, Rimmerman D, Chollet M, Glownia J, van Driel T, Castellano F, Li X, Chen LX. Revealing Excited State Trajectories on Potential Energy Surfaces with Atomic Resolution in Real Time. Angew Chem Int Ed Engl 2023:e202304615. [PMID: 37114904 DOI: 10.1002/anie.202304615] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 03/31/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 04/29/2023]
Abstract
Photoexcited molecular trajectories on the potential energy surfaces prior to thermalization are intimately connected to the photochemical reaction outcome. The excited state trajectories of a diplatinum complex featuring photo-activated metal-metal 𝜎-bond formation and associated Pt-Pt stretching motions were detected in real time using femtosecond wide angle X-ray solution scattering. The observed motions correspond well with coherent vibrational wavepacket motions detected by femtosecond optical transient absorption. Two key coordinates for intersystem crossing have been identified, the Pt-Pt bond distance and the orientation of the ligands coordinated with the platinum centers, along which the excited state trajectories can be projected onto the calculated potential energy surfaces of the excited states. This investigation has gleaned novel insight into electronic transitions occurring on the time scales of vibrational motions measured in real time, revealing ultrafast nonadiabatic or non-equilibrium processes along excited state trajectories involving multiple excited state potential energy surfaces.
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Affiliation(s)
| | | | - Pyosang Kim
- Northwestern University Department of Chemistry, Chemistry, UNITED STATES
| | - Alexis Mills
- University of Washington, Chemistry, UNITED STATES
| | | | - Elisa Biasin
- Pacific North National Laboratory, Chemistry, UNITED STATES
| | | | - Darren Hsu
- Northwestern University, Chemistry, UNITED STATES
| | - Matthew Kirschner
- Northwestern University Department of Chemistry, Chemistry, UNITED STATES
| | - Dolev Rimmerman
- Northwestern University Department of Chemistry, Chemistry, UNITED STATES
| | - Matthieu Chollet
- SLAC: Stanford Linear Accelerator Center, Physics, UNITED STATES
| | - James Glownia
- SLAC: Stanford Linear Accelerator Center, Physics, UNITED STATES
| | - Tim van Driel
- SLAC: Stanford Linear Accelerator Center, Physics, UNITED STATES
| | | | - Xiaosong Li
- University of Washington, Chemistry, UNITED STATES
| | - Lin X Chen
- Argonne National Lab/Northwestern Univ., Chemistry, 9700 S. Cass Ave., 60439, Lemont, UNITED STATES
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13
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Chatterjee S, Chakraborty A, Banik J, Mahindru S, Sharma AK, Mukherjee M. SNAP@CQD as a promising therapeutic vehicle against HCoVs: an overview. Drug Discov Today 2023; 28:103601. [PMID: 37119964 PMCID: PMC10140467 DOI: 10.1016/j.drudis.2023.103601] [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: 12/19/2022] [Revised: 04/04/2023] [Accepted: 04/24/2023] [Indexed: 05/01/2023]
Abstract
This report discusses potential therapies for treating human coronaviruses (HCoVs) and their economic impact. Specifically, we explore therapeutics that can support the body's immune response, including immunoglobulin (Ig)A, IgG and T-cell responses, to inhibit the viral replication cycle and improve respiratory function. We hypothesize that carbon quantum dots conjugated with S-nitroso-N-acetylpenicillamine (SNAP) could be a synergistic alternative cure for treating respiratory injuries caused by HCoV infections. To achieve this, we propose developing aerosol sprays containing SNAP moieties that release nitric oxide and are conjugated onto promising nanostructured materials. These sprays could combat HCoVs by inhibiting viral replication and improving respiratory function. Furthermore, they could potentially provide other benefits, such as providing novel possibilities for nasal vaccines in the future. Teaser: Synergistic effect of carbon quantum dots and S-nitroso-N-acetylpenicillamine (SNAP) could be suggested as an alternative treatment for the respiratory damage caused by HCoV infections that further open possibilities of developing novel nasal vaccines.
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Affiliation(s)
- Satyaki Chatterjee
- Amity Institute of Click Chemistry Research and Studies (AICCRS), Amity University, Noida, U.P. - 201301, India
| | - Arnab Chakraborty
- Amity Institute of Click Chemistry Research and Studies (AICCRS), Amity University, Noida, U.P. - 201301, India
| | - Jyotiparna Banik
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, ON M5S 3E5, Canada
| | - Sanya Mahindru
- Amity Institute of Biotechnology, Amity University, Noida - 201303, India
| | - Arun K Sharma
- Department of Pharmacology, Amity Institute of Pharmacy, Amity University, Gurugram, Haryana - 122413, India
| | - Monalisa Mukherjee
- Amity Institute of Click Chemistry Research and Studies (AICCRS), Amity University, Noida, U.P. - 201301, India; Amity Institute of Biotechnology, Amity University, Noida - 201303, India.
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14
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Chakraborty A, Muranjan M, Karande S, Kharkar V. Porphyrias: Uncommon disorders masquerading as common childhood diseases. J Postgrad Med 2023:374441. [PMID: 37082991 PMCID: PMC10394526 DOI: 10.4103/jpgm.jpgm_698_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023] Open
Abstract
Porphyrias are a rare group of inborn errors of metabolism due to defects in the heme biosynthetic pathway. The biochemical hallmark is the overproduction of porphyrin precursors and porphyrin species. Afflicted patients present with a myriad of symptoms causing a diagnostic odyssey. Symptoms often overlap with those of common diseases and may be overlooked unless there is heightened clinical suspicion. We are reporting clinical features and diagnostic challenges in four pediatric patients having variegate porphyria, congenital erythropoietic porphyria, acute intermittent porphyria, and erythropoietic protoporphyria (EPP), who presented with diverse multisystem manifestations. This case series illustrates a logical analysis of symptoms and judicious selection of investigations and the role of genotyping in successfully diagnosing porphyrias.
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Affiliation(s)
- A Chakraborty
- Genetic Clinic, Department of Pediatrics, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
| | - M Muranjan
- Genetic Clinic, Department of Pediatrics, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
| | - S Karande
- Genetic Clinic, Department of Pediatrics, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
| | - V Kharkar
- Department of Dermatology, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
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15
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Vasudeo V, Khanna A, Pratihar SK, Jaipuria J, Chakraborty A, Rawal SK, Singh A. Robot-assisted retroperitoneal lymph node dissection for post-chemotherapy residual mass in testicular cancer: Long-term experience from a tertiary care centre. J Minim Access Surg 2023; 19:288-295. [PMID: 36629220 PMCID: PMC10246628 DOI: 10.4103/jmas.jmas_141_22] [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: 05/13/2022] [Revised: 07/03/2022] [Accepted: 07/09/2022] [Indexed: 12/12/2022] Open
Abstract
Objectives To present our intermediate to long-term oncological and functional outcomes of robot-assisted retroperitoneal lymph node dissection (RA-RPLND) in post-chemotherapy (PC) residual mass in testicular cancers. To the best of our knowledge, this is the largest single-centre experience of RA-RPLND for in such setting. Methods Prospectively maintained database of carcinoma testis patients undergoing RA-RPLND from February 2012 to September 2021 was reviewed. Patient demographics, tumour stage and risk groups and chemotherapy details were recorded. Intraoperative details and post-operative complications were also noted. Pathological outcomes included were lymph node yield and histopathology report. Further, follow-up was done for recurrence and antegrade ejaculation status. Results Total of 37 cases were done for PC residual masses. International germ cell cancer collaborative group good, intermediate and poor risk proportion was 18 (48.6%), 14 (37.8%) and 5 (13.5%), respectively. Bilateral full template dissection, unilateral modified template dissection and residual mass excision was performed in 59.5% (22/37), 35.1% (13/37) and 5.4% (2/37) patients, respectively. The median size of the excised residual mass was 3.45 cm interquartile range (IQR 2-6 cm), with the largest being 9 cm. The median lymph nodal yield was 19. The most common histology was necrosis (n = 24, 65%), followed by teratoma (n = 11, 30%) and viable malignancy (n = 2, 5%). Antegrade ejaculation was reported in 32 patients (86.4%). After a median follow-up of 41 (IQR 14-64) months, only one patient had a recurrence. Conclusions RA-PC-RPLND is thus a safe, feasible and oncologically effective option for selected patients. With increasing experience, larger masses can also be dealt with efficiently.
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Affiliation(s)
- Vivek Vasudeo
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Ashish Khanna
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | | | - Jiten Jaipuria
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Arnab Chakraborty
- Department of Surgical Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Sudhir Kumar Rawal
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Amitabh Singh
- Department of Uro-Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
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16
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Banik B, Alam S, Chakraborty A. Comparative study between GRA and MEREC technique on an agricultural-based MCGDM problem in pentagonal neutrosophic environment. Int J Environ Sci Technol (Tehran) 2023; 20:1-16. [PMID: 36817165 PMCID: PMC9928147 DOI: 10.1007/s13762-023-04768-1] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/16/2022] [Accepted: 01/06/2023] [Indexed: 06/18/2023]
Abstract
In this research article, an improved Multi-criteria group decision-making (MCGDM) strategy has been developed in pentagonal neutrosophic environment incorporating grey relational analysis and method on the removal effects of criteria (MEREC) techniques to address the relative advantages and disadvantages of these aspects in MCGDM. The aim of the study is to improve MCGDM technique which can capture the underlying uncertainties in robust way and can produce consistent results in a more rigorous way. Here, the conception of Hamming distance between two pentagonal neutrosophic number (PNN)s is introduced and the weighted arithmetic and geometric averaging operators in PNN arena are deployed to craft our computational technique more progressive and robust. An agriculture-based numerical problem is illustrated to demonstrate the ranking results of the alternatives by both of the techniques. After evaluating the problem by two aggregation operators, it is found that "plantation crop" is the best alternative under certain circumstances. Lastly, the sensitivity investigation is performed which reveals that with the appliance of arithmetic and geometric aggregation operators the best ranked alternative preserves its position by both of the ranking methods, which definitely exhibit the consistency and robustness of our executed methodology.
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Affiliation(s)
- B. Banik
- Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103 India
| | - S. Alam
- Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103 India
| | - A. Chakraborty
- Department of Engineering Science, Academy of Technology, Adisaptagram, West Bengal 712502 India
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17
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Chakraborty A, Pandey S, Pandey RK, Singh K, Kumar S, Kumar S, Rao TR, Das N. Self‐assembled neutral and ionic [2 + 2] metallomacrocycles using a new flexible ditopic Pt (II)–based organometallic tecton bearing a pyrimidine motif: Facile syntheses and enhanced anticancer potency. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry Indian Institute of Technology Patna Patna Bihar India
| | - Shambhavi Pandey
- Research Institute for Agriculture and Life Sciences Seoul National University Seoul Republic of Korea
| | | | - Khushwant Singh
- Department of Chemistry Indian Institute of Technology Patna Patna Bihar India
| | - Saurabh Kumar
- Department of Chemistry Indian Institute of Technology Patna Patna Bihar India
| | - Santosh Kumar
- Department of Chemistry Harcourt Butler Technical University Kanpur U.P India
| | - T. Rajagopala Rao
- Department of Chemistry Indian Institute of Technology Patna Patna Bihar India
| | - Neeladri Das
- Department of Chemistry Indian Institute of Technology Patna Patna Bihar India
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18
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Singh A, Agarwal A, Chakraborty A, Bhardwaj R, Sutradhar S, Kumar Mittal A, Kumar Rajput S, Gupta M, Ray D, Mukherjee M. Click chemistry tailored benzimidazole functionalized triazole block-co-polymer for emergence of exotic chimaeric nano-crystalsomes. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111503] [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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19
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Chakraborty A, Yuwono SH, Deustua JE, Shen J, Piecuch P. Benchmarking the Semi-Stochastic CC( P; Q) Approach for Singlet-Triplet Gaps in Biradicals. J Chem Phys 2022; 157:134101. [DOI: 10.1063/5.0100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We recently proposed a semi-stochastic approach to converging high-level coupled-cluster (CC) energetics, such as those obtained in the CC calculations with singles, doubles, and triples (CCSDT), in which the deterministic CC( P; Q) framework is merged with the stochastic configuration interaction Quantum Monte Carlo propagations [J. E. Deustua, J. Shen,and P. Piecuch, Phys. Rev. Lett. 119, 223003 (2017)]. In this work, we investigate the ability of the semi-stochastic CC( P; Q) methodology to recover the CCSDT energies of the lowest singlet and triplet states and the corresponding singlet-triplet gaps of biradical systems using methylene, (HFH)−, cyclobutadiene, cyclopentadienyl cation, and trimethylenemethane as examples.
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Affiliation(s)
- Arnab Chakraborty
- Michigan State University Department of Chemistry, United States of America
| | - Stephen H. Yuwono
- Michigan State University Department of Chemistry, United States of America
| | | | - Jun Shen
- Department of Chemistry, Michigan State University, United States of America
| | - Piotr Piecuch
- Department of Chemistry, Michigan State University, United States of America
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20
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Siddiqui R, Sharma N, Chakraborty A, Shivam K, Patra S, Rani J, Mukherjee M, Titi HM, Patra R, Dhamija S. Electrochemical, Photophysical, Morphological and DFT Study of Polymorphic Sn(IV)-Porphyrins Containing Fluorinated Axial Ligand. Chem Asian J 2022; 17:e202200515. [PMID: 35833469 DOI: 10.1002/asia.202200515] [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: 05/18/2022] [Revised: 07/08/2022] [Indexed: 11/11/2022]
Abstract
In this study, we report the polymorphism of six coordinated Sn(IV)- tetrabromophenyl porphyrins axially armed with fluorine-substituted phenolate ligands (structural formula [Sn(TBrPP)2+(A-)2], where A is the axial ligand = 3,5-difluoro phenol, compound 1). One form stabilizes in triclinic system (namely, 1α), and the other stabilizes in monoclinic system (namely, 1β). The two 1α and 1β polymorphs display distinct photophysical and morphological properties in the solid state. X-ray diffraction study reveals that these polymorphs 1α and 1β significantly differ in their supramolecular architecture, different axial phenolate conformations, and noncovalent interactions, which are responsible for their distinct solid-state properties. The crystal packing of these polymorphs dominates by intermolecular C-H···F, C-H···π and C-Br···F interhalogen interactions. Furthermore, the solid-state emission spectra of 1α showed red-shifted emission bands with respect to 1β, in addition the redox behavior of 1α is slightly different in comparison to 1β. Complementary theoretical studies with Hirshfeld surface analysis show the definite role of Br···F interhalogen interactions in the overall stability. Mapping the electrostatic potential isosurfaces with the aid of density functional theory in compound 1 clearly shows the presence of σ-hole, a requisite feature to show halogen interactions in the crystalline state. In addition, lattice energy and single point energy calculation shows that 1α was found to be energetically more favorable and thermodynamically more stable compare to 1β.
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Affiliation(s)
- Rafia Siddiqui
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | - Niharika Sharma
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | - Arnab Chakraborty
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | - Kumar Shivam
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | - Sayan Patra
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | - Jyoti Rani
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | - Monalisa Mukherjee
- Amity University, Amity Institute of Click Chemistry Research and Studies, INDIA
| | | | - Ranjan Patra
- Amity University - Noida Campus, AICCRS, AICCRS, India, 201313, Noida, INDIA
| | - Swati Dhamija
- Amity University, Amity Institute of Click Chemistry Research and Studies, 201303, Noida, INDIA
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21
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Agarwal A, Jeevanandham S, Sangam S, Chakraborty A, Mukherjee M. Exploring the Role of Carbon-Based Nanomaterials in Microalgae for the Sustainable Production of Bioactive Compounds and Beyond. ACS Omega 2022; 7:22061-22072. [PMID: 35811909 PMCID: PMC9260754 DOI: 10.1021/acsomega.2c01009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 06/03/2022] [Indexed: 05/05/2023]
Abstract
An enchanting yet challenging task is the development of higher productivity in plants to meet the ample food demands for the growing global population while harmonizing the ecosystem using front-line technologies. This has kindled the practice of green microalgae cultivation as a driver of key biostimulant products, targeting agronomic needs. To this end, a prodigious and economical strategy for producing bioactive compounds (sources of secondary metabolites) from microalgae using carbon-based nanomaterials (CNMs) as a platform can circumvent these hurdles. Recently, the nanobionics approach of incorporating CNMs with living systems has emerged as a promising technique to develop organelles with new and augmented functions. Herein, we discuss the importance of 2D carbon nanosheets (CNS) as an alternative carbon source for the phototrophic cultivation of microalgae. CNS not only aids in cost reduction for algal cultivation but also confers combinatorial innate or exogenous functions that enhance its programmed biosynthetic metabolism, proliferation, or tolerance to stress. Moreover, the inherent ability of CNS to act as efficient biocatalysts can enhance the rate of photosynthesis. The primary focus of this mini-review is the development of an economic route for enhanced yield of bioactive compounds while simultaneously serving as a heterogeneous platform for enhancing the sustainable production of biostimulants including bioactive compounds from algal biomass for pharmaceutical and nutraceutical applications.
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Affiliation(s)
- Aakanksha Agarwal
- Molecular
Science and Engineering Laboratory, Amity Institute of Click Chemistry
Research and Studies, Amity University Uttar
Pradesh, Noida 201313, India
| | - Sampathkumar Jeevanandham
- Molecular
Science and Engineering Laboratory, Amity Institute of Click Chemistry
Research and Studies, Amity University Uttar
Pradesh, Noida 201313, India
| | - Sujata Sangam
- Molecular
Science and Engineering Laboratory, Amity Institute of Click Chemistry
Research and Studies, Amity University Uttar
Pradesh, Noida 201313, India
- Amity
Institute of Biotechnology, Amity University
Uttar Pradesh, Noida 201313, India
| | - Arnab Chakraborty
- Molecular
Science and Engineering Laboratory, Amity Institute of Click Chemistry
Research and Studies, Amity University Uttar
Pradesh, Noida 201313, India
| | - Monalisa Mukherjee
- Molecular
Science and Engineering Laboratory, Amity Institute of Click Chemistry
Research and Studies, Amity University Uttar
Pradesh, Noida 201313, India
- Amity
Institute of Biotechnology, Amity University
Uttar Pradesh, Noida 201313, India
- . Tel: +91(0)-120-4392194
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22
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Hamilton SH, Merritt WS, Carter L, Chakraborty A, Cosijn M, Lim-Camacho L, Mishra R, Syme G, Das M, Ray D. Affecting behavioural change through empowerment: conceptual insights from theory and agricultural case studies in South Asia. Reg Environ Change 2022; 22:85. [PMID: 35761800 PMCID: PMC9218702 DOI: 10.1007/s10113-022-01939-7] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
UNLABELLED Affecting behavioural change is a common underlying goal across environmental and agricultural sciences, from climate change mitigation and adaptation, biodiversity conservation, water management, to crop diversification. However, many projects fail to drive or sustain change despite sound science and good intentions. This paper draws on existing theories of behavioural change to construct a conceptual framework that explores pathways to initiate and sustain change through the lens of empowerment, self-efficacy and agency. The framework is demonstrated with case studies from a project in India and Bangladesh that examined social inclusion of marginalised and poor farmers in the context of intensifying agriculture. The framework and case studies highlight that a number of conditions are needed to affect meaningful change including that target beneficiaries are suitably motivated, believe in their own capability and power to enact change and have access to the necessary resources. We propose the framework as a tool to help project teams explore the underlying elements of the process of change when designing, implementing and assessing agricultural or environmental projects and interventions. We contend that behavioural and social change needs to be explicitly fostered in such endeavours to achieve better and longer-term outcomes for the people and environment. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10113-022-01939-7.
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Affiliation(s)
- Serena H. Hamilton
- Institute for Water Futures, Fenner School of Environment & Society, Australian National University, Canberra, ACT Australia
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land & Water, Canberra, ACT Australia
| | - Wendy S. Merritt
- Institute for Water Futures, Fenner School of Environment & Society, Australian National University, Canberra, ACT Australia
| | | | - Arnab Chakraborty
- Professional Assistance for Development Action (PRADAN), Kolkata, India
| | | | | | - Rajeshwar Mishra
- Centre for Development of Human Initiatives (CDHI), Jalpaiguri, India
| | - Geoff Syme
- College of Sciences and Engineering, University of Tasmania, Sandy Bay, Hobart, Australia
- CSIRO Land & Water, Hobart, Australia
| | | | - Dhananjay Ray
- Centre for Development of Human Initiatives (CDHI), Jalpaiguri, India
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23
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Chakraborty A, Jaiswal C, Hassan A, Kumar S, Singh K, Mandal BB, Das N. Tunable and improved antiproliferative activity of Pt (II)–based organometallics bearing alkynyls and 1,2,3‐triazole moieties. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry Indian Institute of Technology Patna Bihta Bihar India
| | - Chitra Jaiswal
- Department of Biosciences and Bioengineering Indian Institute of Technology Guwahati Guwahati Assam India
| | - Atikur Hassan
- Department of Chemistry Indian Institute of Technology Patna Bihta Bihar India
| | - Saurabh Kumar
- Department of Chemistry Indian Institute of Technology Patna Bihta Bihar India
| | - Khushwant Singh
- Department of Chemistry Indian Institute of Technology Patna Bihta Bihar India
| | - Biman B. Mandal
- Department of Biosciences and Bioengineering Indian Institute of Technology Guwahati Guwahati Assam India
- Centre for Nanotechnology Indian Institute of Technology Guwahati Guwahati Assam India
- School of Health Science and Technology Indian Institute of Technology Guwahati Guwahati Assam India
| | - Neeladri Das
- Department of Chemistry Indian Institute of Technology Patna Bihta Bihar India
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24
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Wells KA, Palmer JR, Yarnell JE, Garakyaraghi S, Pemberton BC, Favale JM, Valchar MK, Chakraborty A, Castellano FN. Understanding the influence of geometric and electronic structure on the excited state dynamical and photoredox properties of perinone chromophores. Phys Chem Chem Phys 2021; 23:24200-24210. [PMID: 34693948 DOI: 10.1039/d1cp03870b] [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: 11/21/2022]
Abstract
In this work, a series of eight similarly structured perinone chromophores were synthesized and photophysically characterized to elucidate the electronic and structural tunability of their excited state properties, including excited state redox potentials and fluorescence lifetimes/quantum yields. Despite their similar structure, these chromophores exhibited a broad range of visible absorption properties, quantum yields, and excited state lifetimes. In conjunction with static and time-resolved spectroscopies from the ultrafast to nanosecond time regimes, time-dependent computational modeling was used to correlate this behavior to the relationship between non-radiative decay and the energy-gap law. Additionally, the ground and excited state redox potentials were calculated and found to be tunable over a range of 1 V depending on the diamine or anhydride used in their synthesis (Ered* = 0.45-1.55 V; Eox* = -0.88 to -1.67 V), which is difficult to achieve with typical photoredox-active transition metal complexes. These diverse chromophores can be easily prepared, and with their range of photophysical tunability, will be valuable for future use in photofunctional applications.
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Affiliation(s)
- Kaylee A Wells
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
| | - Jonathan R Palmer
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
| | - James E Yarnell
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA. .,Department of Chemistry & Chemistry Research Center, United States Air Force Academy, Colorado Springs, Colorado, 80840-6230, USA
| | - Sofia Garakyaraghi
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
| | - Barry C Pemberton
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA. .,School of Natural Sciences and Mathematics, Stockton University, Galloway, 08205, USA
| | - Joseph M Favale
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
| | - Mary Katharine Valchar
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
| | - Arnab Chakraborty
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA.
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Chakraborty A, Fernando LD, Fang W, Dickwella Widanage MC, Wei P, Jin C, Fontaine T, Latgé JP, Wang T. A molecular vision of fungal cell wall organization by functional genomics and solid-state NMR. Nat Commun 2021; 12:6346. [PMID: 34732740 PMCID: PMC8566572 DOI: 10.1038/s41467-021-26749-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 10/21/2021] [Indexed: 12/16/2022] Open
Abstract
Vast efforts have been devoted to the development of antifungal drugs targeting the cell wall, but the supramolecular architecture of this carbohydrate-rich composite remains insufficiently understood. Here we compare the cell wall structure of a fungal pathogen Aspergillus fumigatus and four mutants depleted of major structural polysaccharides. High-resolution solid-state NMR spectroscopy of intact cells reveals a rigid core formed by chitin, β-1,3-glucan, and α-1,3-glucan, with galactosaminogalactan and galactomannan present in the mobile phase. Gene deletion reshuffles the composition and spatial organization of polysaccharides, with significant changes in their dynamics and water accessibility. The distribution of α-1,3-glucan in chemically isolated and dynamically distinct domains supports its functional diversity. Identification of valines in the alkali-insoluble carbohydrate core suggests a putative function in stabilizing macromolecular complexes. We propose a revised model of cell wall architecture which will improve our understanding of the structural response of fungal pathogens to stresses. The fungal cell wall is a complex structure composed mainly of glucans, chitin and glycoproteins. Here, the authors use solid-state NMR spectroscopy to assess the cell wall architecture of Aspergillus fumigatus, comparing wild-type cells and mutants lacking major structural polysaccharides, with insights into the distinct functions of these components.
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Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, USA
| | | | - Wenxia Fang
- State Key Laboratory of Non-food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, China
| | | | - Pingzhen Wei
- State Key Laboratory of Non-food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, China
| | - Cheng Jin
- State Key Laboratory of Non-food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, China.,State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Thierry Fontaine
- Unité de Biologie et pathogénicité fongiques, INRAE, USC2019, Institut Pasteur, Paris, France
| | - Jean-Paul Latgé
- Institute of Molecular biology and Biotechnology (IMBBFORTH), University of Crete, Heraklion, Greece.
| | - Tuo Wang
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, USA.
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Chattoraj S, Chakraborty A, Gupta A, Vishwakarma Y, Vishwakarma K, Aparajeeta J. Deep Phenotypic Cell Classification using Capsule Neural Network. Annu Int Conf IEEE Eng Med Biol Soc 2021; 2021:4031-4036. [PMID: 34892115 DOI: 10.1109/embc46164.2021.9629862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Recent developments in ultra-high-throughput microscopy have created a new generation of cell classification methodologies focused solely on image-based cell phenotypes. These image-based analyses enable morphological profiling and screening of thousands or even millions of single cells at a fraction of the cost. They have been shown to demonstrate the statistical significance required for understanding the role of cell heterogeneity in diverse biologists. However, these single-cell analysis techniques are slow and require expensive genetic/epigenetic analysis. This treatise proposes an innovative DL system based on the newly created capsule networks (CapsNet) architecture. The proposed deep CapsNet model employs "Capsules" for high-level feature abstraction relevant to the cell category. Experiments demonstrate that our proposed system can accurately classify different types of cells based on phenotypic label-free bright-field images with over 98.06% accuracy and that deep CapsNet models outperform CNN models in the prior art.
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Azizi A, Camblong H, Chakraborty A, Ordóñez C, Scully M. Quantum optics meets black hole thermodynamics via conformal quantum mechanics: II. Thermodynamics of acceleration radiation. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.104.084085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Weingartz NP, Mara MW, Roy S, Hong J, Chakraborty A, Brown-Xu SE, Phelan BT, Castellano FN, Chen LX. Excited-State Bond Contraction and Charge Migration in a Platinum Dimer Complex Characterized by X-ray and Optical Transient Absorption Spectroscopy. J Phys Chem A 2021; 125:8891-8898. [PMID: 34597043 DOI: 10.1021/acs.jpca.1c07201] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Interactions between metal centers in dimeric transition metal complexes (TMCs) play important roles in their excited-state energetics and pathways and, thus, affect their photophysical properties relevant to their applications, for example, photoluminescent materials and photocatalysis. Here, we report electronic and nuclear structural dynamics studies of two photoexcited pyrazolate-bridged [Pt(ppy)(μ-R2pz)]2-type Pt(II) dimers (ppy = 2-phenylpyridine, μ-R2pz = 3,5-substituted pyrazolate): [Pt(ppy)(μ-H2pz)]2 (1) and [Pt(NDI-ppy)(μ-Ph2pz)]2 (2, NDI = 1,4,5,8-naphthalenediimide), both of which have distinct ground-state Pt-Pt distances. X-ray transient absorption (XTA) spectroscopy at the Pt LIII-edge revealed a new d-orbital vacancy due to the one-electron oxidation of the Pt centers in 1 and 2. However, while a transient Pt-Pt contraction was observed in 2, such an effect was completely absent in 1, demonstrating how the excited states of these complexes are determined by the overlap of the Pt (dz2) orbitals, which is tuned by the steric bulk of the pyrazolate R-groups in the 3- and 5-positions. In tandem with analysis of the Pt-Pt distance structural parameter, we observed photoinduced electron transfer in 2 featuring a covalently linked NDI acceptor on the ppy ligand. The formation and subsequent decay of the NDI radical anion absorption signals were detected upon photoexcitation using optical transient absorption spectroscopy. The NDI radical anion decayed on the same time scale, hundreds of picoseconds, as that of the d-orbital vacancy signal of the oxidized Pt-Pt core observed in the XTA measurements. The data indicated an ultrafast formation of the charge-separated state and subsequent charge recombination to the original Pt(II-II) species.
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Affiliation(s)
- Nicholas P Weingartz
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.,Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Michael W Mara
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.,Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Subhangi Roy
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Jiyun Hong
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Arnab Chakraborty
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Samantha E Brown-Xu
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Brian T Phelan
- Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Lin X Chen
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.,Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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Phadnis S, Sengupta S, Chakraborty A. Work From Home, Mental Health and Employee Needs: A pilot study in selected information technology organizations in India. APJHM 2021. [DOI: 10.24083/apjhm.v16i3.977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction: The Coronavirus (COVID-19) pandemic has impacted the economy and has resulted in changes to the working arrangements of employees who are based at home and may continue to work from home (WFH). Organizations are expected to develop an inclusive policy for their employees to promote mental health whilst working from home. The aim of this study was to document the impact of WFH on mental health and determine the expectations of employees from their organizations regarding occupational health policy.
Methodology: A cross-sectional study was conducted on the impact of work from home on mental health and to document the mental health support needs of employees. Google form was floated through social media platform to receive the responses. A total of 74 responses were received. Descriptive analysis was conducted using Microsoft Excel, while qualitative answers were manually analysed.
Results: About 67% employees (n=45) mentioned that their workload has increased significantly during work from home. Thirty five percent (n=26) felt lonely and lost and 47% (n= 34) felt disconnected from the real world, indicating the mental health impact of work from home. Fifty three percent employees (n=40) mentioned that there were no efforts made by their organization to reduce the mental health impact of work from home.
Conclusion: The results of this study indicate that there is an urgent need to create a comprehensive occupational health and safety policy inclusive of strategies to improve mental health by the organizations in light of “work from home” as a “new-normal”.
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30
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Azizi A, Camblong H, Chakraborty A, Ordóñez C, Scully M. Acceleration radiation of an atom freely falling into a Kerr black hole and near-horizon conformal quantum mechanics. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.104.065006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Chakraborty A, Pang J, Chan D, Watts G. Effectiveness of proprotein convertase subtilisin/kexin-9 monoclonal antibody treatment on plasma lipoprotein(a) in patients with elevated lipoprotein(a) attending a clinic. Atherosclerosis 2021. [DOI: 10.1016/j.atherosclerosis.2021.06.353] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Kim P, Valentine AJS, Roy S, Mills AW, Chakraborty A, Castellano FN, Li X, Chen LX. Ultrafast Excited-State Dynamics of Photoluminescent Pt(II) Dimers Probed by a Coherent Vibrational Wavepacket. J Phys Chem Lett 2021; 12:6794-6803. [PMID: 34270259 DOI: 10.1021/acs.jpclett.1c01289] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Intricate potential energy surfaces (PESs) of some transition metal complexes (TMCs) pose challenges in mapping out initial excited-state pathways that could influence photochemical outcomes. Ultrafast intersystem crossing (ISC) dynamics of four structurally related platinum(II) dimer complexes were examined by detecting their coherent vibrational wavepacket (CVWP) motions of Pt-Pt stretching mode in the metal-metal-to-ligand-charge-transfer excited states. Structurally dependent CVWP behaviors (frequency, dephasing time, and oscillation amplitudes) were captured by femtosecond transient absorption spectroscopy, analyzed by short-time Fourier transformation, and rationalized by quantum mechanical calculations, revealing dual ISC pathways. The results suggest that the ligands could fine-tune the PESs to influence the proximity of the conical intersections of the excited states with the Franck-Condon state and thus to control the branching ratio of the dual ISC pathways. This comparative study presents future opportunities in control excited-state trajectories of TMCs via ligand structures.
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Affiliation(s)
- Pyosang Kim
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Andrew J S Valentine
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Subhangi Roy
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Alexis W Mills
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Arnab Chakraborty
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Lin X Chen
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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Chakraborty A, Chakraborty S, Sen S, Bhatacharya T, Khemka R. Modification of the sacral erector spinae plane block using an ultrasound-guided sacral foramen injection: dermatomal distribution and radiocontrast study. Anaesthesia 2021; 76:1538-1539. [PMID: 34309009 DOI: 10.1111/anae.15549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2021] [Indexed: 11/27/2022]
Affiliation(s)
| | | | - S Sen
- Tata Medical Center, Kolkata, India
| | | | - R Khemka
- Tata Medical Center, Kolkata, India
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Toigo V, Marcuzzi D, Serianni G, Boldrin M, Chitarin G, Bello SD, Grando L, Luchetta A, Pasqualotto R, Zaccaria P, Zanotto L, Agnello R, Agostinetti P, Agostini M, Antoni V, Aprile D, Barbisan M, Battistella M, Berton G, Bigi M, Brombin M, Candeloro V, Canton A, Casagrande R, Cavallini C, Cavazzana R, Cordaro L, Cruz N, Palma MD, Dan M, De Lorenzi A, Delogu R, De Muri M, Denizeau S, Fadone M, Fellin F, Ferro A, Gaio E, Gasparini F, Gasparrini C, Gnesotto F, Jain P, Krastev P, Lopez-Bruna D, Lorenzini R, Maistrello A, Manduchi G, Manfrin S, Marconato N, Martines E, Martini G, Martini S, Milazzo R, Patton T, Pavei M, Peruzzo S, Pilan N, Pimazzoni A, Poggi C, Pomaro N, Pouradier-Duteil B, Recchia M, Rigoni-Garola A, Rizzolo A, Sartori E, Shepherd A, Siragusa M, Sonato P, Sottocornola A, Spada E, Spagnolo S, Spolaore M, Taliercio C, Terranova D, Tinti P, Tomsič P, Trevisan L, Ugoletti M, Valente M, Vignando M, Zagorski R, Zamengo A, Zaniol B, Zaupa M, Zuin M, Cavenago M, Boilson D, Rotti C, Veltri P, Decamps H, Dremel M, Graceffa J, Geli F, Urbani M, Zacks J, Bonicelli T, Paolucci F, Garbuglia A, Agarici G, Gomez G, Gutierrez D, Kouzmenko G, Labate C, Masiello A, Mico G, Moreno JF, Pilard V, Rousseau A, Simon M, Kashiwagi M, Tobari H, Watanabe K, Maejima T, Kojima A, Oshita E, Yamashita Y, Konno S, Singh M, Chakraborty A, Patel H, Singh N, Fantz U, Bonomo F, Cristofaro S, Heinemann B, Kraus W, Wimmer C, Wünderlich D, Fubiani G, Tsumori K, Croci G, Gorini G, McCormack O, Muraro A, Rebai M, Tardocchi M, Giacomelli L, Rigamonti D, Taccogna F, Bruno D, Rutigliano M, D'Arienzo M, Tonti A, Panin F. On the road to ITER NBIs: SPIDER improvement after first operation and MITICA construction progress. Fusion Engineering and Design 2021. [DOI: 10.1016/j.fusengdes.2021.112622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Chakraborty A, Pang J, Chan D, Watts G. Cardiovascular and behavioural risk factors in families with elevated lipoprotein(a)[Lp(a)]. Eur J Prev Cardiol 2021. [DOI: 10.1093/eurjpc/zwab061.234] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background/Introduction
Elevated lipoprotein(a)[Lp(a)] is an inherited and independent risk factor for atherosclerotic cardiovascular diseases (ASCVD). However, it is an under detected condition with no specific therapy available at present for lowering Lp(a). Hence, identifying the distribution of modifiable cardiovascular and behavioural risk factors is important for implementing an effective intervention programme to mitigate the overall risk of ASCVD in high-risk individuals with elevated Lp(a).
Purpose
The primary aim was to describe and compare the distribution of modifiable cardiovascular and behavioural risk factors in both index cases and their relatives with elevated Lp(a) identified through cascade testing at the Lipid Disorders Clinic, Royal Perth Hospital.
Methods
We studied 51 index cases and 71 relatives cascade tested with elevated Lp(a) (≥0.5 g/L). Questionnaires were completed concerning aspects of cardiovascular health (cholesterol level, blood pressure and blood glucose level) and behavioural health metrics (diet, smoking, physical activity, body-mass-index [BMI]). Lp(a) was measured by an immunoassay having minimal dependence on apolipoprotein(a) isoform size. The health metrics were described as proportions and statistical analyses performed using Student’s t-test or Chi-square where appropriate.
Results
Compared with the index cases, a higher proportion of their affected relatives were female (62% vs 43%, p = 0.039), younger (43 years vs 53 years, p < 0.001) and had lower Lp(a) levels (1.03 g/L vs 1.12 g/L, p = 0.003). A lower proportion of the affected relatives were treated for dyslipidaemia (31% vs 96%, p < 0.001). The affected relatives also had a lower incidence of ASCVD events (3% vs 37%, p < 0.001), hypertension (21% vs 43%, p = 0.003), and lower HbA1c levels (5.3% vs 5.9%, p = 0.031) compared with index cases. Additionally, a larger proportion of the affected relatives had ideal cardiovascular health (35% vs 14%, p = 0.008) compared with their index cases. However, more than half of the index cases and their relatives did not maintain a healthy diet (59% and 69%, respectively) and an ideal BMI (68% and 59%, respectively).
Conclusion(s)
Although the younger affected relatives with elevated Lp(a) have a lower cardiovascular risk compared with the index cases, a focus on modifiable behavioural changes, such as a healthy diet and an ideal body weight, is still required to mitigate the overall risk of ASCVD.
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Affiliation(s)
| | - J Pang
- University of Western Australia, Perth, Australia
| | - D Chan
- University of Western Australia, Perth, Australia
| | - G Watts
- Royal Perth Hospital, Lipid Disorders Clinic, Internal Medicine, Department of Cardiology, Perth, Australia
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Singhvi P, Verma J, Panwar N, Wani TQ, Singh A, Qudratullah M, Chakraborty A, Saneja A, Sarkar DP, Panda AK. Molecular Attributes Associated With Refolding of Inclusion Body Proteins Using the Freeze-Thaw Method. Front Microbiol 2021; 12:618559. [PMID: 33959102 PMCID: PMC8093829 DOI: 10.3389/fmicb.2021.618559] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 03/10/2021] [Indexed: 11/13/2022] Open
Abstract
Understanding the structure-function of inclusion bodies (IBs) in the last two decades has led to the development of several mild solubilization buffers for the improved recovery of bioactive proteins. The recently developed freeze-thaw-based inclusion body protein solubilization method has received a great deal of attention due to its simplicity and cost-effectiveness. The present report investigates the reproducibility, efficiency, and plausible mechanism of the freeze-thaw-based IB solubilization. The percentage recovery of functionally active protein species of human growth hormone (hGH) and L-asparaginase from their IBs in Escherichia coli and the quality attributes associated with the freeze-thaw-based solubilization method were analyzed in detail. The overall yield of the purified hGH and L-asparaginase protein was found to be around 14 and 25%, respectively. Both purified proteins had functionally active species lower than that observed with commercial proteins. Biophysical and biochemical analyses revealed that the formation of soluble aggregates was a major limitation in the case of tough IB protein like hGH. On the other hand, the destabilization of soft IB protein like L-asparaginase led to the poor recovery of functionally active protein species. Our study provides insight into the advantages, disadvantages, and molecular-structural information associated with the freeze-thaw-based solubilization method.
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Affiliation(s)
- Priyank Singhvi
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Juhi Verma
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Neha Panwar
- Product Development Cell, National Institute of Immunology, New Delhi, India.,Department of Biochemistry, University of Delhi, New Delhi, India
| | - Tabiya Qayoom Wani
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Akansha Singh
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Md Qudratullah
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Arnab Chakraborty
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Ankit Saneja
- Product Development Cell, National Institute of Immunology, New Delhi, India
| | - Debi P Sarkar
- Department of Biochemistry, University of Delhi, New Delhi, India
| | - Amulya K Panda
- Product Development Cell, National Institute of Immunology, New Delhi, India
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Jurgilas S, Chakraborty A, Rich CJH, Caldwell L, Williams HJ, Fitch NJ, Sauer BE, Frye MD, Hutson JM, Tarbutt MR. Collisions between Ultracold Molecules and Atoms in a Magnetic Trap. Phys Rev Lett 2021; 126:153401. [PMID: 33929220 DOI: 10.1103/physrevlett.126.153401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/19/2021] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
We prepare mixtures of ultracold CaF molecules and Rb atoms in a magnetic trap and study their inelastic collisions. When the atoms are prepared in the spin-stretched state and the molecules in the spin-stretched component of the first rotationally excited state, they collide inelastically with a rate coefficient k_{2}=(6.6±1.5)×10^{-11} cm^{3}/s at temperatures near 100 μK. We attribute this to rotation-changing collisions. When the molecules are in the ground rotational state we see no inelastic loss and set an upper bound on the spin-relaxation rate coefficient of k_{2}<5.8×10^{-12} cm^{3}/s with 95% confidence. We compare these measurements to the results of a single-channel loss model based on quantum defect theory. The comparison suggests a short-range loss parameter close to unity for rotationally excited molecules, but below 0.04 for molecules in the rotational ground state.
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Affiliation(s)
- S Jurgilas
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - A Chakraborty
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - C J H Rich
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - L Caldwell
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - H J Williams
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - N J Fitch
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - B E Sauer
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Matthew D Frye
- Joint Quantum Centre (JQC) Durham-Newcastle, Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - Jeremy M Hutson
- Joint Quantum Centre (JQC) Durham-Newcastle, Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - M R Tarbutt
- Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
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Singla R, Singhal R, Rathore R, Gupta A, Sethi P, Myneedu VP, Chakraborty A, Kumar V. Risk factors for chronic pulmonary aspergillosis in post-TB patients. Int J Tuberc Lung Dis 2021; 25:324-326. [PMID: 33762078 DOI: 10.5588/ijtld.20.0735] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- R Singla
- Department of Tuberculosis and Respiratory Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - R Singhal
- Department of Microbiology, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - R Rathore
- Department of Tuberculosis and Respiratory Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - A Gupta
- Department of Tuberculosis and Respiratory Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - P Sethi
- Department of Tuberculosis and Respiratory Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - V P Myneedu
- Department of Microbiology, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - A Chakraborty
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
| | - V Kumar
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, India
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Perez M, Chakraborty A, Lau LS, Mohammed NBB, Dimitroff CJ. Melanoma-associated glycosyltransferase GCNT2 as an emerging biomarker and therapeutic target. Br J Dermatol 2021; 185:294-301. [PMID: 33660254 DOI: 10.1111/bjd.19891] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2021] [Indexed: 12/17/2022]
Abstract
In metastatic melanoma, with a dismal survival rate and propensity for treatment resistance and recurrence, it is critical to establish biomarkers that better predict treatment response and disease severity. The melanoma glycome, composed of complex carbohydrates termed glycans, is an under-investigated area of research, although it is gaining momentum in the cancer biomarker and therapeutics field. Novel findings suggest that glycans play a major role in influencing melanoma progression and could be exploited for prognosticating metastatic activity and/or as therapeutic targets. In this review, we discuss the role of aberrant glycosylation, particularly the specialized function of β1,6 N-acetylglucosaminyltransferase 2 (GCNT2), in melanoma pathogenesis and summarize mechanisms of GCNT2 regulation to illuminate its potential as a predictive marker and therapeutic target.
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Affiliation(s)
- M Perez
- Department of Translational Medicine, Translational Glycobiology Institute at FIU, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - A Chakraborty
- Department of Translational Medicine, Translational Glycobiology Institute at FIU, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - L S Lau
- Department of Translational Medicine, Translational Glycobiology Institute at FIU, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - N B B Mohammed
- Department of Translational Medicine, Translational Glycobiology Institute at FIU, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - C J Dimitroff
- Department of Translational Medicine, Translational Glycobiology Institute at FIU, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
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Chakraborty A, Ilic S, Cai M, Gibbons BJ, Yang X, Slamowitz CC, Morris AJ. Role of Spin-Orbit Coupling in Long Range Energy Transfer in Metal-Organic Frameworks. J Am Chem Soc 2020; 142:20434-20443. [PMID: 33215496 DOI: 10.1021/jacs.0c09503] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Metal-organic frameworks (MOFs) are emerging as a promising platform for solar energy conversion applications. Their potential utilization as efficient chromophores in artificial photosynthesis is closely related to the understanding of light-harvesting and energy transfer processes that occur within these molecular scaffolds. Herein, we present the photophysical investigation of Ru(II), Ir(III), and Os(II) polypyridyl complexes incorporated into the backbone of UiO-67. In this work, we systematically study the effect of spin-orbit coupling on dipole-dipole energy transfer in MOFs using steady-state and time-resolved spectroscopic techniques. The results of our work indicate successful triplet-to-singlet energy transfer and a sizable increase in the transfer kinetics and critical distance, as direct consequences of strong spin-orbit couplings. Remarkably, the reported R0 value for OsDCBPY (R0 = 88 ± 10 Å) represents one of the largest Förster distances observed in an MOF. Collectively, this work contributes to the general knowledge of energy transfer in materials and provides groundwork for efficient utilization in artificial photosynthetic assemblies.
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Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Stefan Ilic
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Meng Cai
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Bradley J Gibbons
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Xiaozhou Yang
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Connor C Slamowitz
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Amanda J Morris
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
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Lin S, Cairnie DR, Davis D, Chakraborty A, Cai M, Morris AJ. Photoelectrochemical alcohol oxidation by mixed-linker metal-organic frameworks. Faraday Discuss 2020; 225:371-383. [PMID: 33107542 DOI: 10.1039/d0fd00021c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-organic frameworks (MOFs) provide a suitable platform for stable and efficient heterogeneous photoelectrochemical oxidation catalysis due to their highly ordered structure, large surface area, and synthetic tunability. Herein, a mixed-linker MOF comprising of a photosensitizer [Ru(dcbpy)(bpy)2]2+ (bpy = 2,2'-bipyridine, dcbpy = 5,5'-dicarboxy-2,2'-bipyridine) and catalyst [Ru(tpy)(dcbpy)Cl]+ (tpy = 2,2':6',2''-terpyridine) that were incorporated into the UiO-67 framework and grown as thin films on a TiO2-coated, fluorine-doped tin oxide (FTO) electrode (RuB-RuTB-UiO-67/TiO2/FTO). When used as an electrode for the photoelectrochemical oxidation of benzyl alcohol, the mixed-linker MOF film showed a faradaic efficiency of 34%, corresponding to a 3-fold increase in efficiency relative to the RuB-UiO-67/TiO2/FTO control. This increase in catalytic efficiency is ascribed to the activation of RuTB moieties via oxidation by photogenerated RuIIIB. Transient absorption spectroscopy revealed the delayed appearance of RuIIITB* or RuIIITB formation, occurring with a lifetime of 21 ns, due to energy and/or electron transfer. The recovery kinetics of the charge separated state was increased (283 μs) in comparison to single-component control experiments (105 μs for RuB-UiO-67/TiO2/FTO and 7 μs for RuTB-UiO-67/TiO2/FTO) indicating a cooperative effect that could be exploited in chromophore/catalyst MOF motifs.
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Affiliation(s)
- Shaoyang Lin
- Department of Chemistry, Virginia Tech, Blacksburg, VA, USA.
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Yuwono SH, Chakraborty A, Emiliano Deustua J, Shen J, Piecuch P. Accelerating convergence of equation-of-motion coupled-cluster computations using the semi-stochastic CC(P;Q) formalism. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1817592] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Stephen H. Yuwono
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| | - Arnab Chakraborty
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| | | | - Jun Shen
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| | - Piotr Piecuch
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
- Department of Physics & Astronomy, Michigan State University, East Lansing, MI, USA
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Chakraborty A, Hirian R, Kapun G, Pop V. Magnetic Properties of SmCo 5 + 10 wt% Fe Exchange-Coupled Nanocomposites Produced from Recycled SmCo 5. Nanomaterials (Basel) 2020; 10:nano10071308. [PMID: 32635399 PMCID: PMC7407525 DOI: 10.3390/nano10071308] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/19/2020] [Accepted: 06/29/2020] [Indexed: 11/17/2022]
Abstract
Nanostructured alloy powders of SmCo5 + 10 wt% Fe obtained using recycled material were studied for the first time. The SmCo5 precursor was obtained from commercial magnets recycled by hydrogen decrepitation. The results were compared with identically processed samples obtained using virgin SmCo5 raw material. The samples were synthesized by dry high-energy ball-milling and subsequent heat treatment. Robust soft/hard exchange coupling was observed—with large coercivity, which is essential for commercial permanent magnets. The obtained energy products for the recycled material fall between 80% and 95% of those obtained when using virgin SmCo5, depending on milling and annealing times. These results further offer viability of recycling and sustainability in production. These powders and processes are therefore candidates for the next generation of specialized and nanostructured exchange-coupled bulk industrial magnets.
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Affiliation(s)
- Arnab Chakraborty
- Research and Development, MAGNETI Ljubljana d.d., 1000 Ljubljana, Slovenia;
- Jožef Stefan International Postgraduate School, 1000 Ljubljana, Slovenia
| | - Răzvan Hirian
- Faculty of Physics, Babeş-Bolyai University, 400084 Cluj-Napoca, Romania;
- Correspondence:
| | - Gregor Kapun
- Department for Material Chemistry, National Institute of Chemistry, 1000 Ljubljana, Slovenia;
| | - Viorel Pop
- Faculty of Physics, Babeş-Bolyai University, 400084 Cluj-Napoca, Romania;
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Chakraborty A, Deligey F, Quach J, Mentink-Vigier F, Wang P, Wang T. Biomolecular complex viewed by dynamic nuclear polarization solid-state NMR spectroscopy. Biochem Soc Trans 2020; 48:1089-1099. [PMID: 32379300 PMCID: PMC7565284 DOI: 10.1042/bst20191084] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 01/07/2023]
Abstract
Solid-state nuclear magnetic resonance (ssNMR) is an indispensable tool for elucidating the structure and dynamics of insoluble and non-crystalline biomolecules. The recent advances in the sensitivity-enhancing technique magic-angle spinning dynamic nuclear polarization (MAS-DNP) have substantially expanded the territory of ssNMR investigations and enabled the detection of polymer interfaces in a cellular environment. This article highlights the emerging MAS-DNP approaches and their applications to the analysis of biomolecular composites and intact cells to determine the folding pathway and ligand binding of proteins, the structural polymorphism of low-populated biopolymers, as well as the physical interactions between carbohydrates, proteins, and lignin. These structural features provide an atomic-level understanding of many cellular processes, promoting the development of better biomaterials and inhibitors. It is anticipated that the capabilities of MAS-DNP in biomolecular and biomaterial research will be further enlarged by the rapid development of instrumentation and methodology.
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Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Fabien Deligey
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Jenny Quach
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
| | | | - Ping Wang
- Department of Microbiology, Immunology, and Parasitology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Tuo Wang
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
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Lameijer B, Antony J, Chakraborty A, Does R, Garza-Reyes J. The role of organisational motivation and coordination in continuous improvement implementations: an empirical research of process improvement project success. Total Quality Management & Business Excellence 2020. [DOI: 10.1080/14783363.2020.1757422] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- B.A. Lameijer
- Department of Operations Management, University of Amsterdam, Amsterdam, The Netherlands
| | - J. Antony
- Department of Business Management, Heriot Watt University, Edinburgh, Scotland
| | - A. Chakraborty
- Department of Operations Management & Quantitative Techniques, Indian Institute of Management Tiruchirappalli, Trichy, India
| | - R.J.M.M. Does
- Department of Operations Management, University of Amsterdam, Amsterdam, The Netherlands
| | - J.A. Garza-Reyes
- Centre for Supply Chain Improvement, University of Derby, Derby, England
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Abstract
J-dimer emission is an emergent property that occurs when pairs of ground state fluorophores associate, typically in a dilute solution medium. The resulting fluorescence is shifted with respect to the monomer. J-dimer emission, however, has never been observed in concentrated dispersions or in the solid state. We posited that multivariate (MTV) MOFs with double interwoven structures would help to isolate these dimers within their crystalline matrix. Using this strategy, J-aggregate density was controlled during crystallization by following a substitutional solid solution approach. Here, we identified the presence of J-dimers over the entire composition range for interwoven PIZOF-2/NNU-28 structures with variable amounts of a diethynyl-anthracene aggregate-forming link. We produced bulk crystals that systematically shifted their fluorescence from green to red with lifetimes (up to 13 ns) and quantum yields (up to 76%) characteristic of π–π stacked aggregates. Photophysical studies also revealed an equilibrium constant of dimerization, KD = 1.5 ± 0.3 M−1, enabling the first thermodynamic quantification of link–link interactions that occur during MOF assembly. Our findings elucidate the role that supramolecular effects play during crystallization of MTV MOFs, opening pathways for the preparation of solid-state materials with solution-like properties by design. J-dimer emission is an emergent property that occurs when pairs of ground-state fluorophores associate within multivariate MOFs producing tunable red shifted emission.![]()
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Affiliation(s)
- Wesley J Newsome
- Department of Chemistry and Renewable Energy and Chemical Transformations Cluster, University of Central Florida 4111 Libra Dr. Orlando FL 32816 USA
| | - Arnab Chakraborty
- Department of Chemistry, Virginia Tech Blacksburg Virginia 24060 USA
| | - Richard T Ly
- Department of Chemistry and Renewable Energy and Chemical Transformations Cluster, University of Central Florida 4111 Libra Dr. Orlando FL 32816 USA
| | - Gavin S Pour
- Department of Chemistry and Renewable Energy and Chemical Transformations Cluster, University of Central Florida 4111 Libra Dr. Orlando FL 32816 USA
| | - David C Fairchild
- Department of Chemistry and Renewable Energy and Chemical Transformations Cluster, University of Central Florida 4111 Libra Dr. Orlando FL 32816 USA
| | - Amanda J Morris
- Department of Chemistry, Virginia Tech Blacksburg Virginia 24060 USA
| | - Fernando J Uribe-Romo
- Department of Chemistry and Renewable Energy and Chemical Transformations Cluster, University of Central Florida 4111 Libra Dr. Orlando FL 32816 USA
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Singla R, Raghu B, Gupta A, Caminero JA, Sethi P, Tayal D, Chakraborty A, Jain Y, Migliori GB. Risk factors for early mortality in patients with pulmonary tuberculosis admitted to the emergency room. Pulmonology 2020; 27:35-42. [PMID: 32127307 DOI: 10.1016/j.pulmoe.2020.02.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 12/03/2019] [Revised: 01/24/2020] [Accepted: 02/06/2020] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Mortality of patients with pulmonary tuberculosis (TB) admitted to emergency departments is high. This study was aimed at analysing the risk factors associated with early mortality and designing a risk score based on simple parameters. METHODS This prospective case-control study enrolled patients admitted to the emergency department of a referral TB hospital. Clinical, radiological, biochemical and microbiological risk factors associated with death were compared among patients dying within one week from admission (cases) and those surviving (controls). RESULTS Forty-nine of 250 patients (19.6%) experienced early mortality. Multiple logistic regression analysis showed that oxygen saturation (SaO2) ≤90%, severe malnutrition, tachypnoea, tachycardia, hypotension, advanced disease at chest radiography, severe anaemia, hyponatremia, hypoproteinemia and hypercapnia were independently and significantly associated with early mortality. A clinical scoring system was further designed to stratify the risk of death by selecting five simple parameters (SpO2 ≤ 90%, tachypnoea, hypotension, advanced disease at chest radiography and tachycardia). This model predicted early mortality with a positive predictive value of 94.88% and a negative predictive value of 19.90%. CONCLUSIONS The scoring system based on simple parameters may help to refer severely ill patients early to a higher level to reduce mortality, improve success rates, minimise the need for pulmonary rehabilitation and prevent post-treatment sequelae.
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Affiliation(s)
- R Singla
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, 110030, India.
| | - B Raghu
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, 110030, India
| | - A Gupta
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, 110030, India
| | - J A Caminero
- Pneumology Department, Hospital General de Gran Canaria "Dr. Negrin", Las Palmas de Gran Canaria, 35010, Spain; MDR-TB Unit, Tuberculosis Division, International Union against Tuberculosis and Lung Disease, Paris 75006, France
| | - P Sethi
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, 110030, India
| | - D Tayal
- Department of Biochemistry, National Institute of Tuberculosis and Respiratory Diseases, New Delhi 110030, India
| | - A Chakraborty
- Department of Tuberculosis and Chest Diseases, National Institute of Tuberculosis and Respiratory Diseases, New Delhi, 110030, India
| | - Y Jain
- Jan Swasthya Sahyog, Bilaspur, Ganiyari, Chhattisgarh 495112, India
| | - G B Migliori
- Servizio di Epidemiologia Clinica delle Malattie Respiratorie, Istituti Clinici Scientifici Maugeri IRCCS, Tradate, 21049, Italy; Blizard Institute, Queen Mary University of London, 4 Newark St, Whitechapel, London E1 2AT, United Kingdom
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Padhy SR, Bhattacharyya P, Dash PK, Reddy CS, Chakraborty A, Pathak H. Seasonal fluctuation in three mode of greenhouse gases emission in relation to soil labile carbon pools in degraded mangrove, Sundarban, India. Sci Total Environ 2020; 705:135909. [PMID: 31839306 DOI: 10.1016/j.scitotenv.2019.135909] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 04/02/2019] [Revised: 11/27/2019] [Accepted: 12/01/2019] [Indexed: 06/10/2023]
Abstract
Tropical mangrove represents one of the most threatened ecosystems despite their huge contribution to ecosystem services, carbon (C) sequestration and climate change mitigation. Understanding the system in light of seasonal fluctuations on greenhouse gases (GHGs) emissions due to human interferences and the tidal effect is important for devising site-specific real-time climate change mitigation strategies. In order to capture the seasonal variations, the three modes of transport of GHGs through pneumatophore, ebullition as bubbles and water-soluble diffusion was quantified. The three unique techniques for the gas collection were used to estimate the GHGs [methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2)] emission, at three degraded-mangrove sites in Sundarban, India. We identified three degraded mangrove ecologies based on the remote sensing data of 1930 and 2013 (mangrove-covered area in Sundarban; 2387, 2136 km2, respectively). Samples were collected and analyzed for four seasons [winter (November-January), summer (February-April), pre-monsoon (May-June) and monsoon (July-October)], at three representative sites (Sadhupur, Dayapur, and Pakhiralaya). Monsoonal CH4 and CO2 fluxes (0.353 ± 0.026 and 64.5 ± 6.1 mmol m-2 d-1, respectively) were higher than winter and summer. However, the soil labile C pools showed the opposite trend i.e. more in summer followed by winter and monsoon. In contrast, the N2O fluxes were more during summer (54.2 ± 3.2 μmol m-2 d-1). The stagnant water had higher dissolved GHGs concentration compared to tidewater due to less salinity and a long time of stagnation. The mode of transport of GHGs through pneumatophore, ebullition, and water-soluble diffusion was also significantly varied with seasons, soil‑carbon status and tidewater intrusion. Therefore, seasonal fluctuations of GHGs emission and tidal effect must be considered along with soil labile C pools for GHG-C budgeting and climate change mitigation in the mangrove ecosystem.
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Affiliation(s)
- S R Padhy
- ICAR-National Rice Research Institute (NRRI), Cuttack, Odisha, India
| | - P Bhattacharyya
- ICAR-National Rice Research Institute (NRRI), Cuttack, Odisha, India.
| | - P K Dash
- ICAR-National Rice Research Institute (NRRI), Cuttack, Odisha, India
| | - C S Reddy
- National Remote Sensing Centre, Hyderabad, India
| | | | - H Pathak
- ICAR-National Rice Research Institute (NRRI), Cuttack, Odisha, India
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Rahman M, Chakraborty A, Mazumdar S, Nandi N, Bhuiyan M, Alauddin S, Khan I, Hossain MJ. Effects of poly(vinylpyrrolidone) protected platinum nanoparticles on seed germination and growth performance of Pisum sativum. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.nanoso.2019.100408] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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