1
|
Chavan S, Choubey N. Self-supervised category selective attention classifier network for diabetic macular edema classification. Acta Diabetol 2024:10.1007/s00592-024-02257-6. [PMID: 38521818 DOI: 10.1007/s00592-024-02257-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 02/11/2024] [Indexed: 03/25/2024]
Abstract
AIMS This study aims to develop an advanced model for the classification of Diabetic Macular Edema (DME) using deep learning techniques. Specifically, the objective is to introduce a novel architecture, SSCSAC-Net, that leverages self-supervised learning and category-selective attention mechanisms to improve the precision of DME classification. METHODS The proposed SSCSAC-Net integrates self-supervised learning to effectively utilize unlabeled data for learning robust features related to DME. Additionally, it incorporates a category-specific attention mechanism and a domain-specific layer into the ResNet-152 base architecture. The model is trained using an ensemble of unsupervised and supervised learning techniques. Benchmark datasets are utilized for testing the model's performance, ensuring its robustness and generalizability across different data distributions. RESULTS Evaluation of the SSCSAC-Net on multiple datasets demonstrates its superior performance compared to existing techniques. The model achieves high accuracy, precision, and recall rates, with an accuracy of 98.7%, precision of 98.6%, and recall of 98.8%. Furthermore, the incorporation of self-supervised learning reduces the dependency on extensive labeled data, making the solution more scalable and cost-effective. CONCLUSIONS The proposed SSCSAC-Net represents a significant advancement in automated DME classification. By effectively using self-supervised learning and attention mechanisms, the model offers improved accuracy in identifying DME-related features within retinal images. Its robustness and generalizability across different datasets highlight its potential for clinical applications, providing a valuable tool for clinicians in diagnosing DME effectively.
Collapse
Affiliation(s)
- Sachin Chavan
- SVKM'S NMIMS, Mukesh Patel School of Technology Management and Engineering, Shirpur, Maharashtra, India.
| | - Nitin Choubey
- SVKM'S NMIMS, Mukesh Patel School of Technology Management and Engineering, Shirpur, Maharashtra, India
| |
Collapse
|
2
|
Chavan S, Bhattacharya S. Study of employees’ behavior during organizational change: effects of business theatre on Kübler-Ross model. CM 2022. [DOI: 10.18137/cardiometry.2022.22.237243] [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: 11/08/2022] Open
Abstract
Purpose – This article aims to study the employees’ behavior during organizational change and the effects of business theatre on the Kübler-Ross Model to boost the employees’ spirit so that the efficiency of an organization would increase. Design/methodology/approach – The authors revisit the insights from previous work on the role of organizational change and its effects on employees’ behavior. Classic KüblerRoss Model has been used in this study to analyze employees’ behavior during the change process. Findings – This article shows how business theatre can act as a healer and help employees overcome emotional turmoil. Eventually, the implementation of business theatre may shorten the time taken by the employees when they go through shock-denial-anger-bargaining-depression-acceptance-commitment phases of grief. Originality/value – The paper provides new insights into the role of business theatre in organizational change management. It focuses on the interrelationship between both, with the help of the conceptual framework of the Kübler-Ross Model, which explains employees’ behavior during the organizational change.
Collapse
|
3
|
Quintanal-Villalonga A, Taniguchi H, Zhan Y, Hasan M, Chavan S, Uddin F, Allaj V, Manoj P, Shah N, Chan J, Chow A, Offin M, Bhanot U, Egger J, Qiu J, De Stanchina E, Chang J, Rekhtman N, Houck-Loomis B, Koche R, Yu H, Sen T, Rudin C. MA11.06 Multi-Omic Characterization of Lung Tumors Implicates AKT and MYC Signaling in Adenocarcinoma to Squamous Cell Transdifferentiation. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Quintanal-Villalonga A, Taniguchi H, Hao Y, Chow A, Zhan Y, Chavan S, Uddin F, Allaj V, Manoj P, Shah N, Chan J, Offin M, Egger J, Bhanot U, Qiu J, De Stanchina E, Sen T, Poirier J, Rudin C. MA16.03 CRISPR Screen Reveals XPO1 as a Therapeutic Target Strongly Sensitizing to First and Second Line Therapy in Small Cell Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
5
|
Zhao C, Chavan S, He X, Zhou M, Cazzonelli CI, Chen ZH, Tissue DT, Ghannoum O. Smart glass impacts stomatal sensitivity of greenhouse Capsicum through altered light. J Exp Bot 2021; 72:3235-3248. [PMID: 33484266 DOI: 10.1093/jxb/erab028] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
Optical films that alter light transmittance may reduce energy consumption in high-tech greenhouses, but their impact on crop physiology remains unclear. We compared the stomatal responses of Capsicum plants grown hydroponically under control glass (70% diffuse light) or the smart glass (SG) film ULR-80, which blocked >50% of short-wave radiation and ~9% of photosynthetically active radiation (PAR). SG had no significant effects on steady-state (gs) or maximal (gmax) stomatal conductance. In contrast, SG reduced stomatal pore size and sensitivity to exogenous abscisic acid (ABA), thereby increasing rates of leaf water loss, guard cell K+ and Cl- efflux, and Ca2+ influx. SG induced faster stomatal closing and opening rates on transition between low (100 µmol m-2 s-1) and high PAR (1500 µmol m-2 s-1), which compromised water use efficiency relative to control plants. The fraction of blue light (0% or 10%) did not affect gs in either treatment. Increased expression of stomatal closure and photoreceptor genes in epidermal peels of SG plants is consistent with fast stomatal responses to light changes. In conclusion, stomatal responses of Capsicum to SG were more affected by changes in light intensity than spectral quality, and re-engineering of the SG should maximize PAR transmission, and hence CO2 assimilation.
Collapse
Affiliation(s)
- Chenchen Zhao
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- School of Science, Western Sydney University, Penrith, NSW 2753, Australia
- Tasmanian Institute of Agriculture, University of Tasmania, Prospect, TAS, 7250, Australia
| | - Sachin Chavan
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- National Vegetable Protected Cropping Centre, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - Xin He
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- National Vegetable Protected Cropping Centre, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - Meixue Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, Prospect, TAS, 7250, Australia
| | - Christopher I Cazzonelli
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- National Vegetable Protected Cropping Centre, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - Zhong-Hua Chen
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- School of Science, Western Sydney University, Penrith, NSW 2753, Australia
- National Vegetable Protected Cropping Centre, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- National Vegetable Protected Cropping Centre, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - Oula Ghannoum
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- National Vegetable Protected Cropping Centre, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
- ARC Centre of Excellence for Translational Photosynthesis, Australia
| |
Collapse
|
6
|
Lin AL, Jonsson P, Ogilvie S, Chavan S, Nolan C, Gavrilovic I, Kaley T, Grommes C, Pentsova E, Diamond E, Daras M, Stone J, DeAngelis L, Tabar V, Brennan C, Young RJ, Rosenblum M, Taylor BS, Mellinghoff IK. OS1.7 Genomic attributes of tumor evolution and treatment response in diffuse glioma. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.013] [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: 11/14/2022] Open
Affiliation(s)
- A L Lin
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - P Jonsson
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - S Ogilvie
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - S Chavan
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - C Nolan
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - I Gavrilovic
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - T Kaley
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - C Grommes
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - E Pentsova
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - E Diamond
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - M Daras
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - J Stone
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - L DeAngelis
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - V Tabar
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - C Brennan
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - R J Young
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - M Rosenblum
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - B S Taylor
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - I K Mellinghoff
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
| |
Collapse
|
7
|
Abstract
Vitamin K3 was employed as a resistance-modifying agent to Investigate its activity in enhancing mitoxantrone (MITO)-induced cytotoxicity in parental (P388/S) and multidrug resistant (P388/ADR) P388 leukemia cells. Vitamin K3 potentiated the antitumor effects of MITO in P388/S and P388/ ADR tumor cells as monitored by inhibition of tumor cell survival (MTT assay). MITO and vitamin K3 in combination effected an enhanced inhibition of [3H]thymidine (DNA synthesis) and [3H]uridine (RNA synthesis) and also Increased the life span of the sensitive and resistant tumor-bearing animals. The effect of vitamin K3 on the induction of DNA strand breaks by MITO was also examined. Increased fragmentation of DNA was illustrated in the sensitive and resistant P388 leukemia cells exposed to the combination. Observations indicate the restoration of sensitivity in P388/ADR cells to MITO by vitamin K3 that may be due to its ability to increase the MITO-induced DNA strand breaks.
Collapse
Affiliation(s)
- H Parekh
- Chemotherapy Division, Cancer Research Institute, Tata Memorial Centre, Parel, Bombay, India
| | | | | |
Collapse
|
8
|
Lee D, Seo Y, Khan MS, Hwang J, Jo Y, Son J, Lee K, Park C, Chavan S, Gilad AA, Choi J. Use of Nanoscale Materials for the Effective Prevention and Extermination of Bacterial Biofilms. BIOTECHNOL BIOPROC E 2018. [DOI: 10.1007/s12257-017-0348-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
9
|
Son J, Hwang J, Lee D, Khan MS, Jo Y, Lee K, Park C, Chavan S, Seo Y, Choi Y, Kim S, Kim D, Na D, Choi J. Strategies for the optimization of bead-immunoassays for the effective detection of target biomolecules. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-017-0323-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Kanu NJ, Vates UK, Singh GK, Chavan S. Fracture problems, vibration, buckling, and bending analyses of functionally graded materials: A state-of-the-art review including smart FGMS. Particulate Science and Technology 2018. [DOI: 10.1080/02726351.2017.1410265] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Nand Jee Kanu
- S. V. National Institute of Technology, Surat, Gujrat, India
| | - Umesh Kumar Vates
- Amity School of Engineering and Technology, Amity University, Noida, Uttar Pradesh, India
| | - Gyanendra Kumar Singh
- Amity School of Engineering and Technology, Amity University, Noida, Uttar Pradesh, India
| | - Sachin Chavan
- College of Engineering, Bharati Vidyapeeth Deemed University, Pune, Maharashtra, India
| |
Collapse
|
11
|
Hwang J, Son J, Seo Y, Jo Y, Lee K, Lee D, Khan MS, Chavan S, Park C, Sharma A, Gilad AA, Choi J. Functional silica nanoparticles conjugated with beta-glucan to deliver anti-tuberculosis drug molecules. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.09.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
12
|
Reinsch H, Fröhlich D, Waitschat S, Chavan S, Lillerud KP, Henninger S, Stock N. Optimisation of synthesis conditions for UiO-66-CO2H towards scale-up and its vapour sorption properties. REACT CHEM ENG 2018. [DOI: 10.1039/c7re00214a] [Citation(s) in RCA: 14] [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: 01/14/2023]
Abstract
The zirconium MOF UiO-66-CO2H was obtained under green synthesis conditions and thoroughly characterised, focussing on its vapour sorption properties.
Collapse
Affiliation(s)
- Helge Reinsch
- Institute of Inorganic Chemistry
- 24118 Kiel
- Germany
- MOF Apps AS
- 0801 Oslo
| | - Dominik Fröhlich
- Fraunhofer Institute for Solar Energy Systems ISE
- 79110 Freiburg
- Germany
| | | | - Sachin Chavan
- Department of Chemistry
- University of Oslo
- 0315 Oslo
- Norway
- ProfMOF AS
| | | | - Stefan Henninger
- Fraunhofer Institute for Solar Energy Systems ISE
- 79110 Freiburg
- Germany
| | - Norbert Stock
- Institute of Inorganic Chemistry
- 24118 Kiel
- Germany
- Department of Chemistry
- University of Oslo
| |
Collapse
|
13
|
Gallo E, Gorelov E, Guda AA, Bugaev AL, Bonino F, Borfecchia E, Ricchiardi G, Gianolio D, Chavan S, Lamberti C. Effect of Molecular Guest Binding on the d–d Transitions of Ni2+ of CPO-27-Ni: A Combined UV–Vis, Resonant-Valence-to-Core X-ray Emission Spectroscopy, and Theoretical Study. Inorg Chem 2017; 56:14408-14425. [DOI: 10.1021/acs.inorgchem.7b01471] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Erik Gallo
- NIS and INSTM Reference
Center, Department of Chemistry, University of Turin, Via Quarello
15, I-10135 Torino, Italy
- European Synchrotron Radiation Facility (ESRF), 6 Rue Jules Horowitz, BP 220, 38043, Grenoble Cedex
9, France
| | - Evgeny Gorelov
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Alexander A. Guda
- International Research Center “Smart Materials”, Southern Federal University, Zorge Street 5, 344090 Rostov-on-Don, Russia
| | - Aram L. Bugaev
- NIS and INSTM Reference
Center, Department of Chemistry, University of Turin, Via Quarello
15, I-10135 Torino, Italy
- International Research Center “Smart Materials”, Southern Federal University, Zorge Street 5, 344090 Rostov-on-Don, Russia
| | - Francesca Bonino
- NIS and INSTM Reference
Center, Department of Chemistry, University of Turin, Via Quarello
15, I-10135 Torino, Italy
| | - Elisa Borfecchia
- NIS and INSTM Reference
Center, Department of Chemistry, University of Turin, Via Quarello
15, I-10135 Torino, Italy
| | - Gabriele Ricchiardi
- NIS and INSTM Reference
Center, Department of Chemistry, University of Turin, Via Quarello
15, I-10135 Torino, Italy
| | - Diego Gianolio
- Harwell
Science and Innovation Campus, Diamond Light Source Ltd., OX11 0DE Didcot, United Kingdom
| | - Sachin Chavan
- Department of
Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Carlo Lamberti
- International Research Center “Smart Materials”, Southern Federal University, Zorge Street 5, 344090 Rostov-on-Don, Russia
- CrisDi and INSTM Reference Center, Department of Chemistry, University of Turin, Via P. Giuria 7, I-10125 Torino, Italy
| |
Collapse
|
14
|
Losch P, Pinar AB, Willinger MG, Soukup K, Chavan S, Vincent B, Pale P, Louis B. H-ZSM-5 zeolite model crystals: Structure-diffusion-activity relationship in methanol-to-olefins catalysis. J Catal 2017. [DOI: 10.1016/j.jcat.2016.11.005] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
15
|
Pawlyn C, Kaiser M, Heuck C, Melchor L, Wardell C, Murison A, Chavan S, Johnson D, Begum D, Proszek P, Cairns D, Boyle E, Jones J, Cook G, Drayson M, Owen R, Gregory W, Jackson G, Barlogie B, Davies F, Walker B, Morgan G. The spectrum and clinical impact of epigenetic modifier mutations in myeloma. Clinical Lymphoma Myeloma and Leukemia 2015. [DOI: 10.1016/j.clml.2015.07.244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
16
|
Heuck CJ, Jethava Y, Khan R, van Rhee F, Zangari M, Chavan S, Robbins K, Miller SE, Matin A, Mohan M, Ali SM, Stephens PJ, Ross JS, Miller VA, Davies F, Barlogie B, Morgan G. Inhibiting MEK in MAPK pathway-activated myeloma. Leukemia 2015; 30:976-80. [PMID: 26228812 PMCID: PMC4832073 DOI: 10.1038/leu.2015.208] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- C J Heuck
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Y Jethava
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - R Khan
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - F van Rhee
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - M Zangari
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S Chavan
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - K Robbins
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S E Miller
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - A Matin
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - M Mohan
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S M Ali
- Foundation Medicine, Inc., Cambridge, MA, USA
| | | | - J S Ross
- Foundation Medicine, Inc., Cambridge, MA, USA.,Department of Pathology, Albany Medical College, Albany, NY, USA
| | - V A Miller
- Foundation Medicine, Inc., Cambridge, MA, USA
| | - F Davies
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - B Barlogie
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - G Morgan
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| |
Collapse
|
17
|
Bloch ED, Queen WL, Chavan S, Wheatley PS, Zadrozny JM, Morris R, Brown CM, Lamberti C, Bordiga S, Long JR. Gradual Release of Strongly Bound Nitric Oxide from Fe2(NO)2(dobdc). J Am Chem Soc 2015; 137:3466-9. [DOI: 10.1021/ja5132243] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Eric D. Bloch
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Wendy L. Queen
- Center
of Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sachin Chavan
- Department
of Chemistry, NIS, CrisDi, and INSTM Centre of Reference, University of Turin, Via Quarello 15, I-10135 Torino, Italy
| | - Paul S. Wheatley
- EaStChem
School of Chemistry, University of St Andrews, Purdie Building, St Andrews KY16 9ST, U.K
| | - Joseph M. Zadrozny
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Russell Morris
- EaStChem
School of Chemistry, University of St Andrews, Purdie Building, St Andrews KY16 9ST, U.K
| | - Craig M. Brown
- Center
of Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Department
of Chemical Engineering, University of Delaware, Newark, Delaware 19716, United States
- The
Bragg Institute, Australian Nuclear Science and Technology Organization, PMB1 Menai, New South Wales, Australia
| | - Carlo Lamberti
- Department
of Chemistry, NIS, CrisDi, and INSTM Centre of Reference, University of Turin, Via Quarello 15, I-10135 Torino, Italy
- Southern Federal University, Zorge
Street 5, 344090 Rostov-on-Don, Russia
| | - Silvia Bordiga
- Department
of Chemistry, NIS, CrisDi, and INSTM Centre of Reference, University of Turin, Via Quarello 15, I-10135 Torino, Italy
| | - Jeffrey R. Long
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| |
Collapse
|
18
|
Losch P, Boltz M, Louis B, Chavan S, Olsbye U. Catalyst optimization for enhanced propylene formation in the methanol-to-olefins reaction. CR CHIM 2015. [DOI: 10.1016/j.crci.2014.06.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
19
|
Ethiraj J, Albanese E, Civalleri B, Vitillo JG, Bonino F, Chavan S, Shearer GC, Lillerud KP, Bordiga S. Carbon dioxide adsorption in amine-functionalized mixed-ligand metal-organic frameworks of UiO-66 topology. ChemSusChem 2014; 7:3382-8. [PMID: 25302675 DOI: 10.1002/cssc.201402694] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Indexed: 05/14/2023]
Abstract
A series of mixed-ligand [1,4-benzenedicarboxylic acid (BDC)/2-amino-1,4-benzenedicarboxylic acid (ABDC)] UiO-66 metal-organic frameworks (MOFs) synthesized through two different methods (low (LT) and high temperature (HT)) have been investigated for their carbon dioxide adsorption properties from 0 to 1 bar to clarify the role of amino loading on carbon dioxide uptake. Volumetric CO2 isotherms show that the CO2 capacity (normalized to the Langmuir surface area) increases with a degree of functionalization of about 46%; for similar NH2 contents, the same values are found for both synthetic procedures. Microcalorimetric isotherms reveal that amino-functionalized materials have a larger differential heat of adsorption (q(diff) ) towards CO2 ; reaching 27(25) and 20(22) kJ mol(-1) on HT(LT)-UiO-66-NH2 and UiO-66, respectively, at the lowest equilibrium pressures used in this study. All experimental results are supported by values obtained through quantum mechanical calculations.
Collapse
Affiliation(s)
- Jayashree Ethiraj
- Department of Chemistry, NIS and INSTM Reference Centre, University of Turin, Via G. Quarello 15A, 10135 and Via P. Giuria 7, 10125 Turin (Italy)
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Bloch ED, Hudson MR, Mason JA, Chavan S, Crocellà V, Howe JD, Lee K, Dzubak AL, Queen WL, Zadrozny JM, Geier SJ, Lin LC, Gagliardi L, Smit B, Neaton JB, Bordiga S, Brown CM, Long JR. Reversible CO binding enables tunable CO/H₂ and CO/N₂ separations in metal-organic frameworks with exposed divalent metal cations. J Am Chem Soc 2014; 136:10752-61. [PMID: 24999916 DOI: 10.1021/ja505318p] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Six metal-organic frameworks of the M2(dobdc) (M = Mg, Mn, Fe, Co, Ni, Zn; dobdc(4-) = 2,5-dioxido-1,4-benzenedicarboxylate) structure type are demonstrated to bind carbon monoxide reversibly and at high capacity. Infrared spectra indicate that, upon coordination of CO to the divalent metal cations lining the pores within these frameworks, the C-O stretching frequency is blue-shifted, consistent with nonclassical metal-CO interactions. Structure determinations reveal M-CO distances ranging from 2.09(2) Å for M = Ni to 2.49(1) Å for M = Zn and M-C-O angles ranging from 161.2(7)° for M = Mg to 176.9(6)° for M = Fe. Electronic structure calculations employing density functional theory (DFT) resulted in good agreement with the trends apparent in the infrared spectra and crystal structures. These results represent the first crystallographically characterized magnesium and zinc carbonyl compounds and the first high-spin manganese(II), iron(II), cobalt(II), and nickel(II) carbonyl species. Adsorption isotherms indicate reversible adsorption, with capacities for the Fe, Co, and Ni frameworks approaching one CO per metal cation site at 1 bar, corresponding to loadings as high as 6.0 mmol/g and 157 cm(3)/cm(3). The six frameworks display (negative) isosteric heats of CO adsorption ranging from 52.7 to 27.2 kJ/mol along the series Ni > Co > Fe > Mg > Mn > Zn, following the Irving-Williams stability order. The reversible CO binding suggests that these frameworks may be of utility for the separation of CO from various industrial gas mixtures, including CO/H2 and CO/N2. Selectivities determined from gas adsorption isotherm data using ideal adsorbed solution theory (IAST) over a range of gas compositions at 1 bar and 298 K indicate that all six M2(dobdc) frameworks could potentially be used as solid adsorbents to replace current cryogenic distillation technologies, with the choice of M dictating adsorbent regeneration energy and the level of purity of the resulting gases.
Collapse
Affiliation(s)
- Eric D Bloch
- Department of Chemistry, University of California , Berkeley, California 94720, United States
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Chavan S, K N. A Review on Source Plants of Dronpushpi - Leucas cephalotes (Roth) Spreng and Leucas aspera Spreng. IJAM 2013. [DOI: 10.47552/ijam.v4i4.285] [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: 11/12/2022]
|
22
|
Bonino F, Lamberti C, Chavan S, Vitillo JG, Bordiga* S. CHAPTER 4. Characterization of MOFs. 1. Combined Vibrational and Electronic Spectroscopies. Catalysis Series 2013. [DOI: 10.1039/9781849737586-00076] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
23
|
Chavan S. Effect of data imputation on overall standard mortality rate (SMR) in core adult patient database. Aust Crit Care 2013. [DOI: 10.1016/j.aucc.2013.02.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
24
|
Sumida K, Stück D, Mino L, Chai JD, Bloch ED, Zavorotynska O, Murray LJ, Dincă M, Chavan S, Bordiga S, Head-Gordon M, Long JR. Impact of Metal and Anion Substitutions on the Hydrogen Storage Properties of M-BTT Metal–Organic Frameworks. J Am Chem Soc 2013; 135:1083-91. [DOI: 10.1021/ja310173e] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kenji Sumida
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - David Stück
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Lorenzo Mino
- Department
of Chemistry, NIS
Centre of Excellence and INSTM, University of Torino, Via Quarello, 11 I-10135 Torino, Italy
| | - Jeng-Da Chai
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Eric D. Bloch
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Olena Zavorotynska
- Department
of Chemistry, NIS
Centre of Excellence and INSTM, University of Torino, Via Quarello, 11 I-10135 Torino, Italy
| | - Leslie J. Murray
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Mircea Dincă
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Sachin Chavan
- Department
of Chemistry, NIS
Centre of Excellence and INSTM, University of Torino, Via Quarello, 11 I-10135 Torino, Italy
| | - Silvia Bordiga
- Department
of Chemistry, NIS
Centre of Excellence and INSTM, University of Torino, Via Quarello, 11 I-10135 Torino, Italy
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Jeffrey R. Long
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| |
Collapse
|
25
|
Shearer GC, Colombo V, Chavan S, Albanese E, Civalleri B, Maspero A, Bordiga S. Stability vs. reactivity: understanding the adsorption properties of Ni3(BTP)2 by experimental and computational methods. Dalton Trans 2013; 42:6450-8. [DOI: 10.1039/c3dt32944e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
26
|
Patil PG, Karemore V, Chavan S, Nimbalkar-Patil SR, Kulkarni R. Multidisciplinary treatment approach with one piece implants for congenitally missing maxillary lateral incisors: a case report. Eur J Prosthodont Restor Dent 2012; 20:92-96. [PMID: 22852527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Congenitally missing lateral incisors are a common clinical occurrence. Dental Implants have become a primary treatment option for replacement of these teeth. Many times in prosthodontic treatment planning a multidisciplinary approach is needed for a comprehensive out come. Prosthodontic treatment planning is needed prior to the patient's consultation and following treatment acceptance; the prosthodontist may need to coordinate treatment needs with other specialists, including an orthodontist and an implant surgeon. This article describes multidisciplinary management of a case presenting with spaced maxillary anteriors due to the congenitally missing lateral incisors. Treatment consisted of initial orthodontic space management to obtain adequate space for missing lateral incisors. Single piece, narrow diameter implants were placed in edentulous spaces on both sides. Aesthetic crown lengthening procedure was performed with all anterior teeth along with tissues surrounding the implants. Metal-ceramic crowns were given as definitive restorations, resulting into an acceptable aesthetic outcome.
Collapse
Affiliation(s)
- P G Patil
- Department of Prosthodontics, Government Dental College and Hospital, Nagpur, Maharashtra, India.
| | | | | | | | | |
Collapse
|
27
|
Valenzano L, Vitillo J, Chavan S, Civalleri B, Bonino F, Bordiga S, Lamberti C. Structure–activity relationships of simple molecules adsorbed on CPO-27-Ni metal–organic framework: In situ experiments vs. theory. Catal Today 2012. [DOI: 10.1016/j.cattod.2011.07.020] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
28
|
Chavan S, Vitillo JG, Gianolio D, Zavorotynska O, Civalleri B, Jakobsen S, Nilsen MH, Valenzano L, Lamberti C, Lillerud KP, Bordiga S. H2storage in isostructural UiO-67 and UiO-66 MOFs. Phys Chem Chem Phys 2012; 14:1614-26. [PMID: 22187720 DOI: 10.1039/c1cp23434j] [Citation(s) in RCA: 246] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sachin Chavan
- Department of Inorganic, Physical and Material Chemistry, and INSTM Reference Center, University of Turin, Via P. Giuria 7, I-10125 Torino, Italy
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Chopdekar K, Chande C, Chavan S, Veer P, Wabale V, Vishwakarma K, Joshi A. Central venous catheter-related blood stream infection rate in critical care units in a tertiary care, teaching hospital in Mumbai. Indian J Med Microbiol 2011; 29:169-71. [PMID: 21654114 DOI: 10.4103/0255-0857.81796] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Blood stream infections related to central venous catheterization are one of the major device-associated infections reported. Patients admitted in critical care units requiring central venous catheterization and presenting with signs of septicemia during catheterization period were investigated for catheter-related blood stream infections (CRBSI). The CRBSI rate was 9.26 per 1000 catheter days in general with highest rate in neonatal intensive care unit (27.02/1000 days). Site of insertion of catheter and duration of catheterization did not show the influence on the CRBSI rate. Coagulase-negative Staphylococci were the predominant cause. Mortality of 33% was observed in patients with CRBSI. Since central venous catheters are increasingly being used in the critical care, regular surveillance for infection associated them are essential.
Collapse
Affiliation(s)
- K Chopdekar
- Department of Microbiology, Grant Medical College and Sir J.J. Hospital, Mumbai 400 008, India
| | | | | | | | | | | | | |
Collapse
|
30
|
Bloch ED, Murray LJ, Queen WL, Chavan S, Maximoff SN, Bigi JP, Krishna R, Peterson VK, Grandjean F, Long GJ, Smit B, Bordiga S, Brown CM, Long JR. Selective Binding of O2 over N2 in a Redox–Active Metal–Organic Framework with Open Iron(II) Coordination Sites. J Am Chem Soc 2011; 133:14814-22. [DOI: 10.1021/ja205976v] [Citation(s) in RCA: 403] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
| | - Leslie J. Murray
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Wendy L. Queen
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Sachin Chavan
- Department of Inorganic, Physical, and Materials Chemistry, NIS Centre of Excellence and INSTM Centre of Reference, University of Turin, Via Quarello 11, I-10135 Torino, Italy
| | | | | | - Rajamani Krishna
- Van’t Hoff Institute for Molecular Sciences, Univeristy of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Vanessa K. Peterson
- The Bragg Institute, Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW, Australia
| | | | - Gary J. Long
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010, United States
| | | | - Silvia Bordiga
- Department of Inorganic, Physical, and Materials Chemistry, NIS Centre of Excellence and INSTM Centre of Reference, University of Turin, Via Quarello 11, I-10135 Torino, Italy
| | - Craig M. Brown
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- The Bragg Institute, Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW, Australia
| | | |
Collapse
|
31
|
Schierbeck H, Lundback P, Palmblad K, Klevenvall L, Li JH, Chavan S, Yang H, Harris HE, Andersson U, Ottosson L. Successful therapy with anti-HMGB1 monoclonal antibodies in two separate experimental arthritis models. Ann Rheum Dis 2011. [DOI: 10.1136/ard.2010.149013.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
32
|
Veer P, Chande C, Chavan S, Wabale V, Chopdekar K, Bade J, Joshi A. Increasing levels of minimum inhibitory concentration vancomycin in methicillin resistant Staphylococcus aureus alarming bell for vancomycin abusers? Indian J Med Microbiol 2011; 28:413-4. [PMID: 20966589 DOI: 10.4103/0255-0857.71810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
33
|
Sumida K, Brown CM, Herm ZR, Chavan S, Bordiga S, Long JR. Hydrogen storage properties and neutron scattering studies of Mg2(dobdc)—a metal–organic framework with open Mg2+adsorption sites. Chem Commun (Camb) 2011; 47:1157-9. [DOI: 10.1039/c0cc03453c] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Areán CO, Chavan S, Cabello CP, Garrone E, Palomino GT. Inside Cover: Thermodynamics of Hydrogen Adsorption on Metal-Organic Frameworks (ChemPhysChem 15/2010). Chemphyschem 2010. [DOI: 10.1002/cphc.201090075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
35
|
Areán CO, Chavan S, Cabello CP, Garrone E, Palomino GT. Thermodynamics of Hydrogen Adsorption on Metal-Organic Frameworks. Chemphyschem 2010; 11:3237-42. [DOI: 10.1002/cphc.201000523] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
36
|
Bruchfeld A, Goldstein RS, Chavan S, Patel NB, Rosas-Ballina M, Kohn N, Qureshi AR, Tracey KJ. Whole blood cytokine attenuation by cholinergic agonists ex vivo and relationship to vagus nerve activity in rheumatoid arthritis. J Intern Med 2010; 268:94-101. [PMID: 20337855 PMCID: PMC2937357 DOI: 10.1111/j.1365-2796.2010.02226.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The central nervous system regulates innate immunity in part via the cholinergic anti-inflammatory pathway, a neural circuit that transmits signals in the vagus nerve that suppress pro-inflammatory cytokine production by an alpha-7 nicotinic acetylcholine receptors (alpha7nAChR) dependent mechanism. Vagus nerve activity is significantly suppressed in patients with autoimmune diseases, including rheumatoid arthritis (RA). It has been suggested that stimulating the cholinergic anti-inflammatory pathway may be beneficial to patients, but it remains theoretically possible that chronic deficiencies in this pathway will render these approaches ineffective. METHODS Here we addressed the hypothesis that inflammatory cells from RA patients can respond to cholinergic agonists with reduced cytokine production in the setting of reduced vagus nerve activity. RESULTS Measurement of RR interval variability (heart rate variability, HRV), in RA patients (n = 13) and healthy controls (n = 10) revealed that vagus nerve activity was significantly depressed in patients. Whole blood cultures stimulated by exposure to endotoxin produced significantly less tumour necrosis factor in samples from RA patients as compared to healthy controls. Addition of cholinergic agonists (nicotine and GTS-21) to the stimulated whole blood cultures however significantly suppressed cytokine production to a similar extent in patients and healthy controls. CONCLUSION These findings suggest that it is possible to pharmacologically target the alpha7nAChR dependent control of cytokine release in RA patients with suppressed vagus nerve activity. As alpha7nAChR agonists ameliorate the clinical course of collagen induced arthritis in animals, it may be possible in the future to explore whether alpha7nAChR agonists can improve clinical activity in RA patients.
Collapse
Affiliation(s)
- A Bruchfeld
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden.
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Murray LJ, Dinca M, Yano J, Chavan S, Bordiga S, Brown CM, Long JR. Highly-Selective and Reversible O2 Binding in Cr3(1,3,5-benzenetricarboxylate)2. J Am Chem Soc 2010; 132:7856-7. [DOI: 10.1021/ja1027925] [Citation(s) in RCA: 269] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Leslie J. Murray
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Mircea Dinca
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Junko Yano
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Sachin Chavan
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Silvia Bordiga
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Craig M. Brown
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Jeffrey R. Long
- Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11 I-10135 Torino, Italy, and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| |
Collapse
|
38
|
Deshpande M, Kulkarni S, Ghormade V, Kapoor M, Chavan S, Kulkarni G, Shouche Y. Development of mycoinsecticide for the control of insect pests: comparative evaluation of Metarhizium isolates to identify strains for commercialization. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
39
|
Vitillo JG, Groppo E, Bordiga S, Chavan S, Ricchiardi G, Zecchina A. Stability and Reactivity of Grafted Cr(CO)3Species on MOF Linkers: A Computational Study. Inorg Chem 2009; 48:5439-48. [DOI: 10.1021/ic9004664] [Citation(s) in RCA: 25] [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: 11/30/2022]
|
40
|
Mercer S, Chavan S, Tong J, Connor D, de Mello W. The Early Detection and Management of Neuropathic Pain Following Combat Injury. J ROY ARMY MED CORPS 2009; 155:94-8. [DOI: 10.1136/jramc-155-02-03] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
41
|
Chavan S, Bonino F, Vitillo JG, Groppo E, Lamberti C, Dietzel PDC, Zecchina A, Bordiga S. Response of CPO-27-Ni towards CO, N2 and C2H4. Phys Chem Chem Phys 2009; 11:9811-22. [DOI: 10.1039/b907258f] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
42
|
Miller SR, Pearce GM, Wright PA, Bonino F, Chavan S, Bordiga S, Margiolaki I, Guillou N, Férey G, Bourrelly S, Llewellyn PL. Structural Transformations and Adsorption of Fuel-Related Gases of a Structurally Responsive Nickel Phosphonate Metal−Organic Framework, Ni-STA-12. J Am Chem Soc 2008; 130:15967-81. [DOI: 10.1021/ja804936z] [Citation(s) in RCA: 159] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stuart R. Miller
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Gordon M. Pearce
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Paul A. Wright
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Francesca Bonino
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Sachin Chavan
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Silvia Bordiga
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Irene Margiolaki
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Nathalie Guillou
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Gérard Férey
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Sandrine Bourrelly
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| | - Philip L. Llewellyn
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST U.K., Department of Inorganic, Physical and Materials Chemistry and NIS Centre of Excellence and INSTM Centro di Riferimento, University of Turin, Via P Giuria 7, I-10125 Turin, Italy, European Synchrotron Radiation Facility, F-38043 Grenoble, France, Institut Lavoisier, Université de Versailles St-Quentin en Yvelines—CNRS, UMR 8180, 45, Avenue des Etats-Unis, 78035 Versailles cedex, France, and
| |
Collapse
|
43
|
Vitillo JG, Regli L, Chavan S, Ricchiardi G, Spoto G, Dietzel PDC, Bordiga S, Zecchina A. Role of Exposed Metal Sites in Hydrogen Storage in MOFs. J Am Chem Soc 2008; 130:8386-96. [DOI: 10.1021/ja8007159] [Citation(s) in RCA: 356] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
44
|
Budman DR, Barginear MF, Goyal A, Chavan S, Yang L, Callabro A, Bradley TP, Tracey KJ. HMGB1 expression in hormonally independent breast carcinoma. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.14655] [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: 11/20/2022] Open
|
45
|
Dietzel PDC, Johnsen RE, Fjellvåg H, Bordiga S, Groppo E, Chavan S, Blom R. Adsorption properties and structure of CO2 adsorbed on open coordination sites of metal–organic framework Ni2(dhtp) from gas adsorption, IR spectroscopy and X-ray diffraction. Chem Commun (Camb) 2008:5125-7. [DOI: 10.1039/b810574j] [Citation(s) in RCA: 331] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Goldstein R, Puerta MG, Lihong Y, Patel N, Kohn N, Lukin M, Lee D, Boah A, Chavan S, Ward M, Fishman P, Sama A, Tracey K. Cholinergic Agonists Inhibit LPS Induced Whole Blood TNF Release Ex Vivo In Patients With Severe Sepsis: A Pilot Study. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.1235] [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: 11/10/2022]
|
47
|
Chavan S, Kodoth S, Pahwa R, Pahwa S. The HIV protease inhibitor Indinavir inhibits cell-cycle progression in vitro in lymphocytes of HIV-infected and uninfected individuals. Blood 2001; 98:383-9. [PMID: 11435307 DOI: 10.1182/blood.v98.2.383] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Indinavir (IDV) is a potent and selective human immunodeficiency virus type 1 (HIV-1) protease inhibitor (PI) widely used in antiretroviral therapy for suppression of HIV, but its effects on the immune system are relatively unknown. Recently, it has been reported that PIs inhibit lymphocyte apoptosis. In the present study we have investigated the effects of ex vivo addition of IDV on lymphocyte activation and apoptosis in cells from HIV-infected children (n = 18) and from healthy uninfected individuals (controls, n = 5) as well as in Jurkat and PM1 T-cell lines. Pretreatment of control peripheral blood mononuclear cell (PBMC) cultures with IDV resulted in a dose-dependent inhibition of lymphoproliferative responses to different activation stimuli. Additionally, this treatment led to cell-cycle arrest in G0/G1 phase in anti-CD3 monoclonal antibody-stimulated PBMC cultures in controls and in 15 of 18 HIV-infected children. Spontaneous- or activation-induced apoptosis of PBMCs from HIV-infected or uninfected individuals or of Fas-induced apoptosis in Jurkat and PM1 T cell lines were not inhibited by IDV. Moreover, IDV did not inhibit activation of caspases-1, -3, -4, -5, -9, and -8 in lysates of Jurkat T cells undergoing Fas-induced apoptosis. The findings indicate that IDV interferes with cell-cycle progression in primary cells but does not directly affect apoptosis. It is concluded that IDV may prolong cell survival indirectly by inhibiting their entry into cell cycle. In individuals on PI therapy, PI-mediated effects could potentially modulate immunologic responses independently of antiviral activity against HIV.
Collapse
Affiliation(s)
- S Chavan
- Division of Allergy/Immunology, Department of Pediatrics, North Shore University Hospital, New York University School of Medicine, Manhasset, NY 11030, USA
| | | | | | | |
Collapse
|
48
|
Kathirvel S, Chavan S, Arya VK, Rehman I, Babu V, Malhotra N, Bhukal I, Chari P. Anesthetic management of patients with Takayasu's arteritis: a case series and review. Anesth Analg 2001; 93:60-5. [PMID: 11429340 DOI: 10.1097/00000539-200107000-00014] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
UNLABELLED Takayasu's arteritis is a rare, chronic progressive panendarteritis involving the aorta and its main branches. Anesthesia for patients with Takayasu's arteritis is complicated by their severe uncontrolled hypertension, end-organ dysfunction resulting from hypertension, stenosis of major blood vessels affecting regional circulation, and difficulties encountered in monitoring arterial blood pressure. Takayasu's arteritis is an uncommon disease and previous descriptions of the anesthetic management of patients with this disease have been limited to isolated case reports in the anesthetic literature, mostly in women undergoing cesarean delivery. We present our experience in this series of eight patients for various emergency and elective surgical procedures and review their perioperative problems and management. IMPLICATIONS This case series describes the anesthetic problems and management of patients with pulseless disease.
Collapse
Affiliation(s)
- S Kathirvel
- Department of Anesthesiology and Critical Care, Postgraduate Institute of Medical Education and Research, Chandigarh-160012, India.
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Chavan S, Bennuri B, Kharbanda M, Chandrasekaran A, Bakshi S, Pahwa S. Evaluation of T cell receptor gene rearrangement excision circles after antiretroviral therapy in children infected with human immunodeficiency virus. J Infect Dis 2001; 183:1445-54. [PMID: 11329124 DOI: 10.1086/320197] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2001] [Revised: 02/20/2001] [Indexed: 11/04/2022] Open
Abstract
Immune reconstitution after antiretroviral therapy in human immunodeficiency virus (HIV)infected patients may result from the recovery of thymus function, peripheral redistribution, or decreased T cell destruction. This study investigated levels of T cell receptor gene rearrangement excision circles (TRECs) as a measure of recent thymic emigrant cells in peripheral blood lymphocytes of 50 HIV-infected infants and children who were followed-up for 40 months after the start or change of antiretroviral therapy. At baseline, patients exhibited fewer TRECs than did uninfected control subjects. The increase in TRECs after antiretroviral therapy was greater in infants than in older HIV-infected children. Of interest, patients who demonstrated discordant responses (i.e., increased CD4 T cell counts without significant virologic suppression) also had substantial gains in TRECs. Furthermore, TRECs correlated positively with the number of CD4 and naive T cells and negatively with age and virus load. Measurement of TRECs may serve as a useful tool for evaluating immune reconstitution in HIV-infected children receiving antiretroviral therapy.
Collapse
Affiliation(s)
- S Chavan
- Immunology and Inflammation Center of Excellence, North Shore-Long Island Jewish Research Institute, Manhasset, NY 10030, USA
| | | | | | | | | | | |
Collapse
|
50
|
Kharbanda M, Than S, Chitnis V, Sun M, Chavan S, Bakshi S, Pahwa S. Patterns of CD8 T cell clonal dominance in response to change in antiretroviral therapy in HIV-infected children. AIDS 2000; 14:2229-38. [PMID: 11089610 DOI: 10.1097/00002030-200010200-00003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To examine the influence of change in antiretroviral therapy (ART) on patterns of CD8 T cell clonal dominance in HIV-infected children. DESIGN Seventeen HIV-infected children with plasma virus loads between 3.1 and 5.7 log10 were investigated before and after changes in ART. METHODS CDR3 spectratyping was performed in 22 T cell receptor (TCR) Vbeta subfamilies by multiplex polymerase chain reaction (PCR) in purified peripheral blood CD8 T cells in conjunction with CD4 cell counts, plasma HIV-RNA copies and lymphoproliferative assays (LPA). RESULTS CD8 T cell clonal dominance in two or more Vbeta families was present in eight out of 17 children. After a change in therapy, 13 patients (76%) acquired new clones whereas three patients (17.6%) showed a loss in CD8 cell clones. An increase in the numbers of dominant clones correlated with an increase in percentage CD4 cell counts (P < 0.001) and with improved LPA responses to tetanus (P < 0.05) and alloantigens (P < 0.01). CD4 cell increase was associated with an initial mean gain of 3.1+/-2.1 CD8 cell clones, independent of a virological response. A loss of CD8 cell clones or failure to achieve CD4 T cell increase was associated with failure to achieve virological suppression. CONCLUSION Children with chronic HIV infection manifest CD8 T cell clonal dominance, which appears to be dependent upon the adequacy of the CD4 cells. With optimization of therapy, a gain in clonal dominance is the predominant response, except in situations of failure to contain viral replication.
Collapse
Affiliation(s)
- M Kharbanda
- Department of Pediatrics, North Shore University Hospital, New York School of Medicine, Manhasset 11030, USA
| | | | | | | | | | | | | |
Collapse
|