28 results on '"Kaushik Sharma"'
Search Results
2. A Comparative Biology of Microglia Across Species
- Author
-
Kaushik Sharma, Kanchan Bisht, and Ukpong B. Eyo
- Subjects
microglia ,evolution ,vertebrates ,invertebrates ,ontogeny ,identity ,Biology (General) ,QH301-705.5 - Abstract
Microglia are unique brain-resident, myeloid cells. They have received growing interest for their implication in an increasing number of neurodevelopmental, acute injury, and neurodegenerative disorders of the central nervous system (CNS). Fate-mapping studies establish microglial ontogeny from the periphery during development, while recent transcriptomic studies highlight microglial identity as distinct from other CNS cells and peripheral myeloid cells. This evidence for a unique microglial ontogeny and identity raises questions regarding their identity and functions across species. This review will examine the available evidence for microglia in invertebrate and vertebrate species to clarify similarities and differences in microglial identity, ontogeny, and physiology across species. This discussion highlights conserved and divergent microglial properties through evolution. Finally, we suggest several interesting research directions from an evolutionary perspective to adequately understand the significance of microglia emergence. A proper appreciation of microglia from this perspective could inform the development of specific therapies geared at targeting microglia in various pathologies.
- Published
- 2021
- Full Text
- View/download PDF
3. Sex Differences of Microglia and Synapses in the Hippocampal Dentate Gyrus of Adult Mouse Offspring Exposed to Maternal Immune Activation
- Author
-
Chin Wai Hui, Haley A. Vecchiarelli, Étienne Gervais, Xiao Luo, Félix Michaud, Lisa Scheefhals, Kanchan Bisht, Kaushik Sharma, Lisa Topolnik, and Marie-Ève Tremblay
- Subjects
microglia ,schizophrenia ,maternal immune activation ,complement ,dentate gyrus ,phagocytosis ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Schizophrenia is a psychiatric disorder affecting ∼1% of humans worldwide. It is earlier and more frequently diagnosed in men than woman, and men display more pronounced negative symptoms together with greater gray matter reductions. Our previous findings utilizing a maternal immune activation (mIA) mouse model of schizophrenia revealed exacerbated anxiety-like behavior and sensorimotor gating deficits in adult male offspring that were associated with increased microglial reactivity and inflammation in the hippocampal dentate gyrus (DG). However, both male and female adult offspring displayed stereotypy and impairment of sociability. We hypothesized that mIA may lead to sex-specific alterations in microglial pruning activity, resulting in abnormal synaptic connectivity in the DG. Using the same mIA model, we show in the current study sex-specific differences in microglia and synapses within the DG of adult offspring. Specifically, microglial levels of cluster of differentiation (CD)68 and CD11b were increased in mIA-exposed females. Sex-specific differences in excitatory and inhibitory synapse densities were also observed following mIA. Additionally, inhibitory synaptic tone was increased in DG granule cells of both males and females, while changes in excitatory synaptic transmission occurred only in females with mIA. These findings suggest that phagocytic and complement pathways may together contribute to a sexual dimorphism in synaptic pruning and neuronal dysfunction in mIA, and may propose sex-specific therapeutic targets to prevent schizophrenia-like behaviors.
- Published
- 2020
- Full Text
- View/download PDF
4. Chronic stress as a risk factor for Alzheimer's disease: Roles of microglia-mediated synaptic remodeling, inflammation, and oxidative stress
- Author
-
Kanchan Bisht, Kaushik Sharma, and Marie-Ève Tremblay
- Subjects
Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Neurology. Diseases of the nervous system ,RC346-429 ,Neurophysiology and neuropsychology ,QP351-495 - Abstract
Microglia are the predominant immune cells of the central nervous system (CNS) that exert key physiological roles required for maintaining CNS homeostasis, notably in response to chronic stress, as well as mediating synaptic plasticity, learning and memory. The repeated exposure to stress confers a higher risk of developing neurodegenerative diseases including sporadic Alzheimer's disease (AD). While microglia have been causally linked to amyloid beta (Aβ) accumulation, tau pathology, neurodegeneration, and synaptic loss in AD, they were also attributed beneficial roles, notably in the phagocytic elimination of Aβ. In this review, we discuss the interactions between chronic stress and AD pathology, overview the roles played by microglia in AD, especially focusing on chronic stress as an environmental risk factor modulating their function, and present recently-described microglial phenotypes associated with neuroprotection in AD. These microglial phenotypes observed under both chronic stress and AD pathology may provide novel opportunities for the development of better-targeted therapeutic interventions. Keywords: Microglia, Stress, Alzheimer's disease, Neurodegeneration, Neuroinflammation, Synaptic remodeling, Microglial phenotypes, Dark microglia
- Published
- 2018
- Full Text
- View/download PDF
5. Dark microglia: Why are they dark?
- Author
-
Kanchan Bisht, Kaushik Sharma, Baptiste Lacoste, and Marie-Ève Tremblay
- Subjects
aging ,Alzheimer disease ,dark microglia ,electron microscopy ,fractalkine receptor deficiency ,microglia ,oxidative stress ,synapses ,Biology (General) ,QH301-705.5 - Abstract
Using transmission electron microscopy (TEM) we recently characterized a microglial phenotype that is induced by chronic stress, fractalkine receptor deficiency, aging, or Alzheimer disease pathology. These ‘dark’ microglia appear overly active compared with the normal microglia, reaching for synaptic clefts, and extensively engulfing pre-synaptic axon terminals and post-synaptic dendritic spines. From these findings we hypothesized that dark microglia could be specifically implicated in the pathological remodeling of neuronal circuits, which impairs learning, memory, and other essential cognitive functions. In the present addendum we further discuss about the possible causes of their dark appearance under TEM.
- Published
- 2016
- Full Text
- View/download PDF
6. Quality Inspection of Dengue kits using YOLOv4 architecture
- Author
-
Akshat Sharma, Kaushik Sharma, Ashita Shetty, and Shubham Shinde
- Subjects
General Medicine - Abstract
With the increasing advancements in Artificial Intelligence and its varied applications across multiple domains, the manufacturing industry is not left behind. Manufacturing and Production require a lot of labour force to ensure good quality end results. While this may be a necessity in the rudimentary stages of development, there is a way to cut down on this while checking the quality of the end product. This project aims at using the power of Artificial Intelligence, specifically Computer vision to create a quality inspecting tool that entails localizing and predicting the required objects in the image of the Dengue kit. This project highlights the entire process including simulation, design of conveyor belt and displays the final process of how both combined can help catalyse quality inspection by subtracting the manual crunch. Keywords: Artificial Intelligence, Inspection, Computer vision, Industry 4.0 Revolution, Object Detection, Yolov4
- Published
- 2022
- Full Text
- View/download PDF
7. Impact of COVID-19 on gross value added of Indian service sector
- Author
-
Priyanka Kaushik Sharma
- Subjects
General Nursing ,Education - Abstract
This paper attempt to analyze the Covid -19 pandemic impact on the gross value added of the Indian service sector. The purpose of present study is to examine the relationship between the number of Covid -19 confirmed cases in India and gross value added of service sector and sub-service sector of India. The results of the study suggest that number of Covid -19 confirmed cases have a negative impact on the gross value added of the service sector and sub-service sectors of India. However, the negative impact of Covid -19 confirmed cases on the gross value added of the service sector and sub-service sectors of India is not statistically significant. This study also suggests what steps the government can take to revitalize the service sector. The present study is quantitative. For the purpose of study data collected from FY 2019 to the first quarter of FY 2021-22. The study is based on secondary data. The database of the Ministry of Statistics and Programme Implementation was the source of information for the Indian Service Sector GVA and the Ministry of Health and Family Welfare (MoHFW) was the source of information for the number of confirmed Covid -19 cases in India.
- Published
- 2022
- Full Text
- View/download PDF
8. One nation one health—Preview through Ayurveda
- Author
-
Dhaliya, Ravi, primary, Kaushik Sharma, BalKrishan, additional, and Dhakkad, GaganSingh, additional
- Published
- 2023
- Full Text
- View/download PDF
9. Capillary-associated microglia regulate vascular structure and function through PANX1-P2RY12 coupling in mice
- Author
-
Jordan Benderoth, Lara Jabbour, Ukpong B. Eyo, Marie-Ève Tremblay, Yu-Yo Sun, Kanchan Bisht, Joseph O. Uweru, Bruce A. Corliss, Kaushik Sharma, Antony Brayan Campos-Salazar, Brant E. Isakson, Hong-Ru Chen, Saipranusha Amancherla, Kenneth A. Okojie, Zainab Calcuttawala, Dennis H. Lentferink, Chia-Yi Kuan, Bria Friestad, and William A. Mills
- Subjects
Male ,Synaptic pruning ,Science ,Cell ,Green Fluorescent Proteins ,CX3C Chemokine Receptor 1 ,General Physics and Astronomy ,Vasodilation ,Cell Count ,Nerve Tissue Proteins ,Neuroimaging ,Molecular neuroscience ,General Biochemistry, Genetics and Molecular Biology ,Connexins ,Article ,Mice ,Immune system ,Genes, Reporter ,medicine ,Animals ,Myeloid Cells ,Receptor ,Mice, Knockout ,Multidisciplinary ,Microglia ,Chemistry ,Neuro-vascular interactions ,Brain ,General Chemistry ,Pannexin ,Receptors, Purinergic P2Y12 ,Cell biology ,Electrodes, Implanted ,medicine.anatomical_structure ,Gene Expression Regulation ,nervous system ,Cerebrovascular Circulation ,Female - Abstract
Microglia are brain-resident immune cells with a repertoire of functions in the brain. However, the extent of their interactions with the vasculature and potential regulation of vascular physiology has been insufficiently explored. Here, we document interactions between ramified CX3CR1 + myeloid cell somata and brain capillaries. We confirm that these cells are bona fide microglia by molecular, morphological and ultrastructural approaches. Then, we give a detailed spatio-temporal characterization of these capillary-associated microglia (CAMs) comparing them with parenchymal microglia (PCMs) in their morphological activities including during microglial depletion and repopulation. Molecularly, we identify P2RY12 receptors as a regulator of CAM interactions under the control of released purines from pannexin 1 (PANX1) channels. Furthermore, microglial elimination triggered capillary dilation, blood flow increase, and impaired vasodilation that were recapitulated in P2RY12−/− and PANX1−/− mice suggesting purines released through PANX1 channels play important roles in activating microglial P2RY12 receptors to regulate neurovascular structure and function., Microglia are involved in debris clearance and synaptic pruning, among other processes. However, their direct interaction with the brain vasculature is less clear. Here, the authors show that capillary-associated microglia (CAMs) regulate vascular tone via PANX1-P2RY12 signalling.
- Published
- 2021
10. Component-Based Dynamic QoS Adaptations in Distributed Real-Time and Embedded Systems.
- Author
-
Praveen Kaushik Sharma, Joseph P. Loyall, George T. Heineman, Richard E. Schantz, Richard Shapiro, and Gary Duzan
- Published
- 2004
- Full Text
- View/download PDF
11. Role of financial literacy and self-efficacy on bias and investment decision making
- Author
-
Ananya Tripathi, Niharika Agrawal, Kaushik Sharma, Gaurav Pandey, Shivam Verma, Smally ., Shrishti Mittal, and Nidhi Singh
- Published
- 2022
- Full Text
- View/download PDF
12. Comparison between Ropivacaine 0.25% and Bupivacaine 0.25% in Paediatric Caudal Anaesthesia in Infra Umbilical Surgeries (A Study of 60 Cases)
- Author
-
Tejash H. Sharma, Kaushik Sharma, Dinesh Chauhan, and Jatin Patel
- Subjects
Bupivacaine ,Aging ,Ropivacaine ,business.industry ,Caudal anaesthesia ,Health Professions (miscellaneous) ,Biochemistry, Genetics and Molecular Biology (miscellaneous) ,General Biochemistry, Genetics and Molecular Biology ,Anesthesia ,General Health Professions ,medicine ,Dentistry (miscellaneous) ,business ,General Dentistry ,medicine.drug - Published
- 2020
- Full Text
- View/download PDF
13. Managing End-to-End QoS in Distributed Embedded Applications.
- Author
-
Praveen Kaushik Sharma, Joseph P. Loyall, Richard E. Schantz, Jianming Ye, Prakash Manghwani, Matthew Gillen, and George T. Heineman
- Published
- 2006
- Full Text
- View/download PDF
14. Capillary-associated microglia regulate vascular structure and function through PANX1-P2RY12 coupling
- Author
-
Ukpong B. Eyo, Dennis H. Lentferink, Chia-Yi Kuan, Yu-Yo Sun, Kanchan Bisht, Kaushik Sharma, Saipranusha Amancherla, Lara Jabbour, Bruce A. Corliss, Zainab Calcuttawala, Bria Friestad, Marie-Ève Tremblay, Antony Brayan Campos-Salazar, William A. Mills, Jordan Benderoth, Hong-Ru Chen, Brant E. Isakson, Kenneth A. Okojie, and Joseph O. Uweru
- Subjects
Genetically modified mouse ,medicine.anatomical_structure ,Microglia ,Chemistry ,CX3CR1 ,Purinergic receptor ,medicine ,Premovement neuronal activity ,Pannexin ,Receptor ,Blood vessel ,Cell biology - Abstract
Microglia are brain-resident immune cells with a repertoire of functions in the developing, mature and pathological brain. Their wide-ranging roles in physiology include the clearance of cellular debris, elimination of excess synapses, regulation of neuronal activity and contributions to blood vessel development. Despite these known roles for microglia, the extent of their interactions with the vasculature and potential regulation of vascular physiology has been insufficiently explored. Here, using in vivo acute and longitudinal two-photon imaging in transgenic mice combined with electron microscopy, fixed tissue immunohistochemistry, pharmacological treatments and laser speckle imaging, we document the steady-state interactions between ramified CX3CR1+ myeloid cell somata and capillaries in the brain. We first confirm that these myeloid cells are bona fide microglia by molecular, morphological and ultrastructural approaches. Then we give a detailed spatio-temporal characterization of these capillary-associated microglia (CAMs) comparing and contrasting them with parenchymal microglia (PCMs) in their static, dynamic and chronic morphological activities including during microglial depletion and repopulation. Molecularly, we identify microglial-specific purinergic P2RY12 receptors as a receptor regulating CAM interactions under the control of released purines from pannexin 1 (PANX1) channels. Furthermore, to elucidate roles for microglia in vascular structure and function, we eliminated microglia and showed that this triggered capillary dilation, blood flow increase, and impaired vasodilative responses. We find that P2RY12−/− and PANX1−/− mice recapitulate these vascular impairments suggesting purines released through PANX1 channels play important roles in activating microglial P2RY12 receptors to regulate neurovascular structure and function.
- Published
- 2021
- Full Text
- View/download PDF
15. End-to-End Quality of Service Management for Distributed Real-Time Embedded Applications.
- Author
-
Prakash Manghwani, Joseph P. Loyall, Praveen Kaushik Sharma, Matthew Gillen, and Jianming Ye
- Published
- 2005
- Full Text
- View/download PDF
16. Microglial-glucocorticoid receptor depletion alters the response of hippocampal microglia and neurons in a chronic unpredictable mild stress paradigm in female mice
- Author
-
Marie-Ève Tremblay, Stefano Garofalo, Bernadette Basilico, Naomi Ciano Albanese, Katherine Picard, Nathalie Vernoux, S. Poggini, Kaushik Sharma, Julie C. Savage, Laura Maggi, Chin Wai Hui, Fatima Abdallah, Davide Ragozzino, Igor Branchi, M.T. Golia, Cristina Limatola, Kanchan Bisht, Irmgard Amrein, University of Zurich, and Tremblay, Marie-Ève
- Subjects
10017 Institute of Anatomy ,hippocampus ,Hippocampus ,microglia ,neurons ,receptors ,Hippocampal formation ,Subgranular zone ,Behavioral Neuroscience ,stress ,0302 clinical medicine ,Glucocorticoid receptor ,Glucocorticoid ,Immunologic ,2802 Behavioral Neuroscience ,glucocorticoid receptor ,Chronic stress ,Receptors, Immunologic ,0303 health sciences ,depletion ,Neurogenesis ,animals ,2807 Endocrine and Autonomic Systems ,neurogenesis ,medicine.anatomical_structure ,female ,depression ,medicine.medical_specialty ,mice ,mouse model ,Immunology ,610 Medicine & health ,membrane glycoproteins ,Biology ,Neuroprotection ,03 medical and health sciences ,Receptors, Glucocorticoid ,male ,Internal medicine ,medicine ,030304 developmental biology ,2403 Immunology ,Behavior ,synaptic plasticity ,Endocrine and Autonomic Systems ,Dentate gyrus ,Endocrinology ,chronic unpredictable mild stress ,receptors, Immunologic ,stress, psychological ,receptors, Glucocorticoid ,570 Life sciences ,biology ,psychological ,030217 neurology & neurosurgery ,Stress, Psychological - Abstract
Chronic psychological stress is one of the most important triggers and environmental risk factors for neuropsychiatric disorders. Chronic stress can influence all organs via the secretion of stress hormones, including glucocorticoids by the adrenal glands, which coordinate the stress response across the body. In the brain, glucocorticoid receptors (GR) are expressed by various cell types including microglia, which are its resident immune cells regulating stress-induced inflammatory processes. To study the roles of microglial GR under normal homeostatic conditions and following chronic stress, we generated a mouse model in which the GR gene is depleted in microglia specifically at adulthood to prevent developmental confounds. We first confirmed that microglia were depleted in GR in our model in males and females among the cingulate cortex and the hippocampus, both stress-sensitive brain regions. Then, cohorts of microglial-GR depleted and wild-type (WT) adult female mice were housed for 3 weeks in a standard or stressful condition, using a chronic unpredictable mild stress (CUMS) paradigm. CUMS induced stress-related behavior in both microglial-GR depleted and WT animals as demonstrated by a decrease of both saccharine preference and progressive ratio breakpoint. Nevertheless, the hippocampal microglial and neural mechanisms underlying the adaptation to stress occurred differently between the two genotypes. Upon CUMS exposure, microglial morphology was altered in the WT controls, without any apparent effect in microglial-GR depleted mice. Furthermore, in the standard environment condition, GR depleted-microglia showed increased expression of pro-inflammatory genes, and genes involved in microglial homeostatic functions (such as Trem2, Cx3cr1 and Mertk). On the contrary, in CUMS condition, GR depleted-microglia showed reduced expression levels of pro-inflammatory genes and increased neuroprotective as well as anti-inflammatory genes compared to WT-microglia. Moreover, in microglial-GR depleted mice, but not in WT mice, CUMS led to a significant reduction of CA1 long-term potentiation and paired-pulse ratio. Lastly, differences in adult hippocampal neurogenesis were observed between the genotypes during normal homeostatic conditions, with microglial-GR deficiency increasing the formation of newborn neurons in the dentate gyrus subgranular zone independently from stress exposure. Together, these findings indicate that, although the deletion of microglial GR did not prevent the animal's ability to respond to stress, it contributed to modulating hippocampal functions in both standard and stressful conditions, notably by shaping the microglial response to chronic stress.
- Published
- 2021
17. Precise Brain Mapping to Perform Repetitive In Vivo Imaging of Neuro-Immune Dynamics in Mice
- Author
-
Kanchan Bisht, Ukpong B. Eyo, and Kaushik Sharma
- Subjects
Cell type ,General Chemical Engineering ,02 engineering and technology ,Biology ,Brain mapping ,General Biochemistry, Genetics and Molecular Biology ,Mice ,Calcium imaging ,In vivo ,0202 electrical engineering, electronic engineering, information engineering ,Animals ,Neural cell ,Cerebral Cortex ,Neurons ,Brain Mapping ,General Immunology and Microbiology ,General Neuroscience ,Brain ,021001 nanoscience & nanotechnology ,Molecular Imaging ,Functional imaging ,Calcium ,020201 artificial intelligence & image processing ,Microglia ,0210 nano-technology ,Neuroglia ,Neuroscience ,Preclinical imaging ,Ex vivo - Abstract
The central nervous system (CNS) is regulated by a complex interplay of neuronal, glial, stromal, and vascular cells that facilitate its proper function. Although studying these cells in isolation in vitro or together ex vivo provides useful physiological information; salient features of neural cell physiology will be missed in such contexts. Therefore, there is a need for studying neural cells in their native in vivo environment. The protocol detailed here describes repetitive in vivo two-photon imaging of neural cells in the rodent cortex as a tool to visualize and study specific cells over extended periods of time from hours to months. We describe in detail the use of the grossly stable brain vasculature as a coarse map or fluorescently labeled dendrites as a fine map of select brain regions of interest. Using these maps as a visual key, we show how neural cells can be precisely relocated for subsequent repetitive in vivo imaging. Using examples of in vivo imaging of fluorescently-labeled microglia, neurons, and NG2+ cells, this protocol demonstrates the ability of this technique to allow repetitive visualization of cellular dynamics in the same brain location over extended time periods, that can further aid in understanding the structural and functional responses of these cells in normal physiology or following pathological insults. Where necessary, this approach can be coupled to functional imaging of neural cells, e.g., with calcium imaging. This approach is especially a powerful technique to visualize the physical interaction between different cell types of the CNS in vivo when genetic mouse models or specific dyes with distinct fluorescent tags to label the cells of interest are available.
- Published
- 2020
- Full Text
- View/download PDF
18. Calming Neurons with a Microglial Touch
- Author
-
Ukpong B. Eyo, Long Jun Wu, and Kaushik Sharma
- Subjects
0301 basic medicine ,Neurons ,Microglia ,General Neuroscience ,Research ,Intact brain ,Brain ,Cell Communication ,Biology ,Neuroprotection ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,medicine.anatomical_structure ,nervous system ,In vivo ,medicine ,Premovement neuronal activity ,Humans ,Neuronal soma ,Neuroscience ,030217 neurology & neurosurgery - Abstract
In vivo two-photon imaging of microglia in the intact brain has revealed that microglia constantly survey neuronal soma. Research over the past decade and a recent paper by Cserep et al. published in Science are now uncovering the nature, mechanisms, and consequences of these interactions in health and injury.
- Published
- 2020
19. A Review on Cladding Process to Improve Metal Properties
- Author
-
Kaushik Sharma
- Subjects
Cladding (metalworking) ,Metal ,0209 industrial biotechnology ,020901 industrial engineering & automation ,Materials science ,0205 materials engineering ,020502 materials ,visual_art ,Metallurgy ,visual_art.visual_art_medium ,02 engineering and technology - Published
- 2018
- Full Text
- View/download PDF
20. The Effect of Process Parameters on Clad Bead Geometry with GMAW
- Author
-
Kaushik Sharma
- Subjects
Materials science ,Process (computing) ,Mechanical engineering ,Bead geometry ,Gas metal arc welding - Published
- 2018
- Full Text
- View/download PDF
21. P.709 Ketogenic diet modulates microglial properties at steady-state and promotes resilience to repeated social defeat stress in adult mice
- Author
-
N. Vernoux, Katherine Picard, Marie-Ève Tremblay, Kanchan Bisht, F. Gonzalez Ibanez, and Kaushik Sharma
- Subjects
Pharmacology ,Steady state (electronics) ,medicine.medical_treatment ,Social defeat ,Psychiatry and Mental health ,Neurology ,medicine ,Pharmacology (medical) ,Neurology (clinical) ,Psychology ,Resilience (network) ,Neuroscience ,Biological Psychiatry ,Ketogenic diet - Published
- 2020
- Full Text
- View/download PDF
22. Immunofluorescence Staining Using IBA1 and TMEM119 for Microglial Density, Morphology and Peripheral Myeloid Cell Infiltration Analysis in Mouse Brain
- Author
-
Kanchan Bisht, Kaushik Sharma, Maude Bordeleau, Fernando González Ibanez, Marie-Ève Tremblay, and Katherine Picard
- Subjects
0301 basic medicine ,Myeloid ,General Chemical Engineering ,Cell ,Fluorescent Antibody Technique ,Biology ,Immunofluorescence ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Mice ,0302 clinical medicine ,medicine ,Animals ,Homeostasis ,Myeloid Cells ,medicine.diagnostic_test ,Microglia ,General Immunology and Microbiology ,Staining and Labeling ,General Neuroscience ,Macrophages ,Colocalization ,Brain ,medicine.disease ,030104 developmental biology ,medicine.anatomical_structure ,Neuroimmunology ,Soma ,Infiltration (medical) ,Neuroscience ,030217 neurology & neurosurgery - Abstract
This is a protocol for the dual visualization of microglia and infiltrating macrophages in mouse brain tissue. TMEM119 (which labels microglia selectively), when combined with IBA1 (which provides an exceptional visualization of their morphology), allows investigation of changes in density, distribution, and morphology. Quantifying these parameters is important in providing insights into the roles exerted by microglia, the resident macrophages of the brain. Under normal physiological conditions, microglia are regularly distributed in a mosaic-like pattern and present a small soma with ramified processes. Nevertheless, as a response to environmental factors (i.e., trauma, infection, disease, or injury), microglial density, distribution, and morphology are altered in various manners, depending on the insult. Additionally, the described double-staining method allows visualization of infiltrating macrophages in the brain based on their expression of IBA1 and without colocalization with TMEM119. This approach thus allows discrimination between microglia and infiltrating macrophages, which is required to provide functional insights into their distinct involvement in brain homeostasis across various contexts of health and disease. This protocol integrates the latest findings in neuroimmunology that pertain to the identification of selective markers. It also serves as a useful tool for both experienced neuroimmunologists and researchers seeking to integrate neuroimmunology into projects.
- Published
- 2019
23. Wind energy resource assessment for the Fiji Islands: Kadavu Island and Suva Peninsula
- Author
-
M. Rafiuddin Ahmed and Kaushik Sharma
- Subjects
geography ,geography.geographical_feature_category ,Wind power ,Meteorology ,Renewable Energy, Sustainability and the Environment ,business.industry ,020209 energy ,02 engineering and technology ,Wind speed ,Prevailing winds ,Ridge ,Peninsula ,Climatology ,Wind shear ,0202 electrical engineering, electronic engineering, information engineering ,Environmental science ,Resource assessment ,business ,Bay - Abstract
Wind energy assessment of two sites in the Fiji Islands is presented. The wind resource of the remote island of Kadavu is analysed along with the urban Suva Peninsula. The former has average (mean) wind speeds of 3.59 ms −1 and 3.88 ms -1 at 20 m and 34 m above ground level (AGL). The latter has average wind speeds of 5.65 ms -1 and 6.38 ms -1 , respectively. The prevailing wind direction for both the sites corresponds to the South-East winds. A wind shear analysis shows the variations in wind speeds during different periods of the day for the Suva site. A high resolution wind resource map of both the sites is simulated using the WAsP software for a radius of 5 km. The WasP analysis indicates good wind power development potential for Kadavu is for the windward side of the Kadavu ridge in the eastern region. The Suva Peninsula site showed good wind power development potential for the Laucala Bay area. A power analysis using the Vestas V27 225 kW turbine is carried out for the specific sites.
- Published
- 2016
- Full Text
- View/download PDF
24. Microglia: Multiple states and multiple roles in the normal and diseased brain and spinal cord
- Author
-
Kaushik Sharma and Marie-Ève Tremblay
- Subjects
Pathology ,medicine.medical_specialty ,Microglia ,business.industry ,General Neuroscience ,Brain ,Spinal cord ,medicine.anatomical_structure ,Spinal Cord ,Animals ,Medicine ,business ,Spinal Cord Injuries - Published
- 2020
- Full Text
- View/download PDF
25. Evaluation of Corporate Governance Compliance
- Author
-
Priyanka Kaushik Sharma
- Subjects
Finance ,Ranking ,business.industry ,Corporate governance ,Audit committee ,Section (typography) ,Significant difference ,Accounting ,Listing (finance) ,business ,Compliance (psychology) ,Test (assessment) - Abstract
This chapter focuses on evaluating companies with respect to compliance with corporate governance norms, as stipulated in the revised Clause 49 of the Listing Agreement, and then analyzing the findings. The chapter is categorized into three sections. Section A relates to the evaluation of corporate governance compliance in the auto industry. Section B relates to the evaluation of corporate governance compliance in the heavy engineering industry. Section C summarizes the results of sections A and B, and submits the conclusion and comparison of both industries. In this chapter, we will be testing two hypotheses: the first hypothesis of study, that there is no difference in level of compliance with corporate governance norms before 2005 and after 2005, and the second hypothesis, that there is no significant difference in the adoption of corporate governance norms by the auto sector and the heavy engineering sector. To test these hypotheses, applied statistical tools such as average, ranking, percentage, Paired-Difference ‘t’ test, and the Mann-Whitney U test have been used. The following are the areas covered in the study: 1. Statement of the Company’s Philosophy on Code of Governance 2. Board of Directors/Board Issues
- Published
- 2015
- Full Text
- View/download PDF
26. Introduction
- Author
-
Priyanka Kaushik Sharma
- Published
- 2015
- Full Text
- View/download PDF
27. Codes and Standards of Corporate Governance
- Author
-
Priyanka Kaushik Sharma
- Subjects
Politics ,business.industry ,Statutory law ,Stock exchange ,Corporate governance ,Audit committee ,Smith Report ,Commonwealth ,Accounting ,Business ,Audit - Abstract
The code of corporate governance contains guidelines for companies on how to strengthen their governance. Corporate scandals of various magnitudes have maintained public and political interest in the regulation of corporate governance worldwide. Corporate governance issues have received of late serious attention globally. Several committees have been set up by stock exchanges; other statutory authorities and chambers of commerce have issued reports suggesting measures to strengthen corporate governance practices all over the world. At an international level, the first committee was the Cadbury Committee on the Financial Aspect of Corporate Governance. Others include the Greenbury Report, the Hampel Committee, the Smith Report on audit committees (UK), the Higgs Committee, the CalPERS Global Corporate Governance Principles (US), the Blue Ribbon Committee (US), the Sarbanes-Oxley (SOX) Act, (US), the CACG Guidelines: Principles for Corporate Governance in the Commonwealth, and the UK’s Combined Code of Corporate Governance. Further, close attention has been paid to this issue by the Organization for Economic Co-operation and Development (OECD). At a national level, committees such as the Kumar Mangalam Birla Committee, the Naresh Chandra Committee on Corporate Audit and Governance, the N. R. Narayana Murthy Committee, and the J. J. Irani Committee have been formed.
- Published
- 2015
- Full Text
- View/download PDF
28. Summary, Conclusions, and Suggestions
- Author
-
Priyanka Kaushik Sharma
- Subjects
Summary conclusions ,medicine.anatomical_structure ,business.industry ,Secondary sector of the economy ,Corporate governance ,Accountability ,Audit committee ,medicine ,Automotive industry ,Globe ,Accounting ,Business ,Stock (geology) - Abstract
This chapter summarizes the results of the present study, which aimed to examine corporate governance practice in Indian industry. It was imperative to conduct a detailed study on corporate governance, due to the worldwide financial scandals and others much closer to home, such as the Satyam case, which have rocked the corporate world across the globe. These have caused severe damage, leading to bankruptcies, unstable stock markets, and shaken investor confidence. Thus, the concept of corporate governance rose to meet these challenges, with due emphasis on accountability, transparency, and fairness in disclosures, as well as identifying the role and responsibilities of the board of directors and management. Therefore, the need arose to check the extent of compliance in terms of corporate governance codes and standards, as framed from time-to-time based on several committee recommendations, which worked to improve the existing practices. The automobile industry and heavy engineering industry were selected as a sample for the present study, as coverage of the entire industrial sector was not possible due to time and resource constraints.
- Published
- 2015
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.