6 results on '"N. Amar"'
Search Results
2. The influence of radiation on MHD boundary layer flow past a nano fluid wedge embedded in porous media
- Author
-
N. Amar and N. Kishan
- Subjects
Radiation ,Nanofluid ,Wedge ,bvp4c ,Viscous dissipation ,MHD ,Applied mathematics. Quantitative methods ,T57-57.97 - Abstract
This study takes into account the viscous dissipation of the laminar viscosity and radiation influence of the MHD heat and mass transfer nanofluid flow across two dimensional boundary layers in the porous medium in the existence of heat, thermophoresis and Brownian motion influence. The governing equations are transformed into nonlinear ordinary differential equations by the aid of the similarity transformation. The solution is numerically solved with the MATLAB in the built-in bvp4c solver. The influences of the appropriate flow parameters are analysed in graphs and in tabular form.
- Published
- 2021
- Full Text
- View/download PDF
3. The influence of radiation on MHD boundary layer flow past a nano fluid wedge embedded in porous media
- Author
-
Naikoti Kishan and N. Amar
- Subjects
T57-57.97 ,Materials science ,Radiation ,Applied mathematics. Quantitative methods ,MHD ,Viscous dissipation ,bvp4c ,Laminar flow ,Mechanics ,Nanofluid ,Wedge ,Thermophoresis ,Physics::Fluid Dynamics ,Boundary layer ,Viscosity ,Flow (mathematics) ,Magnetohydrodynamics ,Porous medium - Abstract
This study takes into account the viscous dissipation of the laminar viscosity and radiation influence of the MHD heat and mass transfer nanofluid flow across two dimensional boundary layers in the porous medium in the existence of heat, thermophoresis and Brownian motion influence. The governing equations are transformed into nonlinear ordinary differential equations by the aid of the similarity transformation. The solution is numerically solved with the MATLAB in the built-in bvp4c solver. The influences of the appropriate flow parameters are analysed in graphs and in tabular form.
- Published
- 2021
4. Differential diagnosis of acute liver failure in India
- Author
-
N. Amarapurkar Deepak and Nikhil D Patel
- Subjects
Acute liver failure ,severe malaria ,dengue fever ,leptospirosis ,enteric fever ,amoebic liver abscess ,Specialties of internal medicine ,RC581-951 - Abstract
Background: Acute liver failure (ALF) is a condition with rapid deterioration of liver function resulting in hepatic encephalopathy and/or coagulopathy in patients with previously normal liver. Complicated forms of certain infectious diseases like falciparum malaria, leptospirosis, dengue fever, ricketsial fever, typhoid fever, haemophagocytosis, herpes simplex virus, cytomegalovirus, tuberculosis or amoebic liver abscess can present with altered mentation and/or bleeding manifestations in presence of jaundice and mimic ALF due to acute viral hepatitis (AVH). Methods: We describe our experience in last 2 years with 28 patients of ALF due to above mentioned conditions (ALF-ID) and compared them with 28 patients with ALF due to AVH (ALF-AVH). Results: In ALF-ID, typhoid fever was present in 1, haemophagocytosis in 1, ricketsial infection in 4 (scrub typhus = 2, endemic typhus = 2), amoebic liver abscess in 4, leptospirosis in 5, dengue fever in 5 and falciparum malaria in 8 patients. In ALF-AVH, hepatitis E and B co-infection was responsible in 1, hepatitis A and E co-infection in 1 and hepatitis E, B and C co-infection in 1, hepatitis E in 18, hepatitis A in 2 and hepatitis B in 5 patients. Differentiation of various forms of ALF-ID from ALF-AVH depends on various clinical, haematological and biochemical parameters, in addition to specific diagnostic tests. Patients with ALF-AVH had mortality rate of 50% (14/28) and ALF-ID had mortality rate of 25% (7/28). Conclusions: In developing countries, ALF-mimicking infections should be looked for in differential diagnosis of ALF. Early identification and treatment of these infections is important in reducing mortality.
- Published
- 2006
- Full Text
- View/download PDF
5. Spatial subsetting enables integrative modeling of oral squamous cell carcinoma multiplex imaging data
- Author
-
Jakob Einhaus, Dyani K. Gaudilliere, Julien Hedou, Dorien Feyaerts, Michael G. Ozawa, Masaki Sato, Edward A. Ganio, Amy S. Tsai, Ina A. Stelzer, Karl C. Bruckman, Jonas N. Amar, Maximilian Sabayev, Thomas A. Bonham, Joshua Gillard, Maïgane Diop, Amelie Cambriel, Zala N. Mihalic, Tulio Valdez, Stanley Y. Liu, Leticia Feirrera, David K. Lam, John B. Sunwoo, Christian M. Schürch, Brice Gaudilliere, and Xiaoyuan Han
- Subjects
Immunology ,Cell biology ,Cancer ,Machine learning ,Science - Abstract
Summary: Oral squamous cell carcinoma (OSCC), a prevalent and aggressive neoplasm, poses a significant challenge due to poor prognosis and limited prognostic biomarkers. Leveraging highly multiplexed imaging mass cytometry, we investigated the tumor immune microenvironment (TIME) in OSCC biopsies, characterizing immune cell distribution and signaling activity at the tumor-invasive front. Our spatial subsetting approach standardized cellular populations by tissue zone, improving feature reproducibility and revealing TIME patterns accompanying loss-of-differentiation. Employing a machine-learning pipeline combining reliable feature selection with multivariable modeling, we achieved accurate histological grade classification (AUC = 0.88). Three model features correlated with clinical outcomes in an independent cohort: granulocyte MAPKAPK2 signaling at the tumor front, stromal CD4+ memory T cell size, and the distance of fibroblasts from the tumor border. This study establishes a robust modeling framework for distilling complex imaging data, uncovering sentinel characteristics of the OSCC TIME to facilitate prognostic biomarkers discovery for recurrence risk stratification and immunomodulatory therapy development.
- Published
- 2023
- Full Text
- View/download PDF
6. Filtering blebs and aqueous pathway an immunocytological and in vivo confocal microscopy study.
- Author
-
Amar N, Labbé A, Hamard P, Dupas B, and Baudouin C
- Subjects
- Aged, Aged, 80 and over, Antimetabolites administration & dosage, Cell Count, Chronic Disease, Conjunctiva metabolism, Epithelium metabolism, Female, Fluorescent Antibody Technique, Indirect, Glaucoma, Open-Angle surgery, Goblet Cells metabolism, Goblet Cells pathology, Humans, Male, Middle Aged, Mitomycin administration & dosage, Mucin 5AC, Mucins metabolism, Retrospective Studies, Vimentin metabolism, Aqueous Humor metabolism, Conjunctiva pathology, Glaucoma, Open-Angle metabolism, Microscopy, Confocal, Trabeculectomy
- Abstract
Objective: To characterize and understand, at the cellular level, the aqueous humor pathways after filtering surgery, using in vivo confocal microscopy and impression cytology (IC)., Design: Observational case series., Participants: Thirty-two blebs of 29 patients after trabeculectomy were retrospectively evaluated., Methods: In vivo confocal microscopy and immunofluorescence staining of IC samples taken on and around the bleb area were performed. Impression cytology samples were examined under confocal microscopy after goblet cell and inflammatory cell immunostaining with anti-MUC5AC and antivimentin antibodies, respectively. Eyes were classified into 3 groups: (1) functioning blebs (11 eyes), (2) nonfunctioning blebs (10 eyes), and (3) functioning blebs after mitomycin C application (12 eyes). Impression cytology specimens and in vivo confocal microscopy images were analyzed and compared in a masked manner., Main Outcome Measures: Conjunctival epithelium changes of each type of bleb were analyzed using both impression cytology specimens and in vivo confocal microscopy and correlated to clinical outcomes., Results: In all IC specimens, numerous MUC5AC-positive cells were observed outside the edges of the blebs. Few MUC5AC-positive cells were observed at the surface of nonfunctioning blebs. Numerous goblet cells with immunostaining that was weak or limited to the membrane were clearly visible morphologically at the surface of functioning blebs (with and without adjunctive mitomycin C). Using in vivo confocal microscopy, all functioning blebs showed numerous intraepithelial optically empty microcysts, whereas nonfunctioning blebs had none or only a few. All blebs contained dendritiform inflammatory cells, especially after mitomycin C application., Conclusion: Impression cytology and in vivo confocal microscopy provide a new approach to filtering blebs. Microcysts observed at the surface of functioning blebs seemed to correspond to goblet cells, mostly containing aqueous humor instead of highly hydrophilic gel-forming mucins. Although this hypothesis requires further confirmation, the transcellular pathway of the aqueous humor could be hypothesized to occur at the level of goblet cells toward the ocular surface.
- Published
- 2008
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.