360 results on '"Sanjeev Kumar Singh"'
Search Results
2. Stepwise Research Analysis of Energy Storage
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Sanjeev Kumar Singh and Dr. Sunil Kumar
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General Medicine - Published
- 2023
3. A Critical Review and Analysis on Energy Storage Systems Applicable in Micro Grids
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Sanjeev Kumar Singh and Dr. Sunil Kumar
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General Medicine - Abstract
With the rise of use of renewable Energy storage systems (ESSs) are gaining a lot of popularity. This paper reviews the different ESSs in power systems, especially microgrids showing their essential role in enhancing the performance of electrical systems. Therefore, the ESSs classified into various technologies as a function of the energy storage form and the main relevant technical parameters. In this review paper, the most common classifications are presented, summarized, and compared according to their characteristics. A specific interest in electrochemical ESSs, especially battery energy storage systems, focusing on their classifications due to their importance in the residential sector. Besides that, the benefits and drawbacks of Lithium-Ion (Li-Ion) batteries are discussed due to their significance. Finally, the environmental impact of these ESSs is discussed.
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- 2023
4. SARS-CoV-2 ORF8 dimerization and binding mode analysis with class I MHC: computational approaches to identify COVID-19 inhibitors
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Chandrabose Selvaraj, Dhurvas Chandrasekaran Dinesh, Emilia Maria Pedone, Abdulaziz S Alothaim, Rajendran Vijayakumar, Ondippili Rudhra, and Sanjeev Kumar Singh
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Genetics ,General Medicine ,Molecular Biology ,Biochemistry - Abstract
SARS-CoV-2 encodes eight accessory proteins, one of which, ORF8, has a poorly conserved sequence with SARS-CoV and its role in viral pathogenicity has recently been identified. ORF8 in SARS-CoV-2 has a unique functional feature that allows it to form a dimer structure linked by a disulfide bridge between Cys20 and Cys20 (S-S). This study provides structural characterization of natural mutant variants as well as the identification of potential drug candidates capable of binding directly to the interchain disulfide bridge. The lead compounds reported in this work have a tendency to settle in the dimeric interfaces by direct interaction with the disulfide bridge. These molecules may disturb the dimer formation and may have an inhibition impact on its potential functional role in host immune evasion and virulence pathogenicity. This work provides detailed insights on the sequence and structural variability through computational mutational studies, as well as potent drug candidates with the ability to interrupt the intermolecular disulfide bridge formed between Cys20 and Cys20. Furthermore, the interactions of ORF8 peptides complexed with MHC-1 is studied, and the binding mode reveals that certain ORF8 peptides bind to MHC-1 in a manner similar to other viral peptides. Overall, this study is a narrative of various computational approaches used to provide detailed structural insights into SARS-CoV-2 ORF8 interchain disulfide bond disruptors.
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- 2023
5. Promoter–motif extraction from co-regulated genes and their relevance to co-expression using E. coli as a model
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Anuraj Nayarisseri, Anushka Bhrdwaj, Arshiya Khan, Khushboo Sharma, Uzma Shaheen, Chandrabose Selvaraj, Mohammad Aqueel Khan, Rajaram Abhirami, Muthuraja Arun Pravin, Gurunathan Rubha Shri, Dhanjay Raje, and Sanjeev Kumar Singh
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Genetics ,General Medicine ,Molecular Biology ,Biochemistry - Abstract
Gene expression varies due to the intrinsic stochasticity of transcription or as a reaction to external perturbations that generate cellular mutations. Co-regulation, co-expression and functional similarity of substances have been employed for indoctrinating the process of the transcriptional paradigm. The difficult process of analysing complicated proteomes and biological switches has been made easier by technical improvements, and microarray technology has flourished as a viable platform. Therefore, this research enables Microarray to cluster genes that are co-expressed and co-regulated into specific segments. Copious search algorithms have been employed to ascertain diacritic motifs or a combination of motifs that are performing regular expression, and their relevant information corresponding to the gene patterns is also documented. The associated genes co-expression and relevant cis-elements are further explored by engaging Escherichia coli as a model organism. Various clustering algorithms have also been used to generate classes of genes with similar expression profiles. A promoter database ‘EcoPromDB’ has been developed by referring RegulonDB database; this promoter database is freely available at www.ecopromdb.eminentbio.com and is divided into two sub-groups, depending upon the results of co-expression and co-regulation analyses.
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- 2023
6. Experimental Analysis of (triaxial /3D) Machining Cutting Forces and Surface Roughness in Turning Operation OF EN8 Steel
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Praveen Kumar and Sanjeev Kumar Singh Yadav
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General Medicine - Abstract
The measurement of all machining forces and surface finish during the turning process. All types of machining process the cutting tool, workpiece of surfaces roughness, tool wear, quality, and accuracy of the part of machining the present study.to investigate the effect of machining input parameters (spindle speed, feed rate, depth of cut) on measuring the forces after machining (cutting force, feed force, thrust force) and surface roughness for turning operation. Using of workpieces is EN8 steel and a cutting tool is a carbide tool. experiment stabilized on the lathe machine. The force is measured by a triaxial piezoelectric sensors base dynamometer and data is transmitted by a data aquation system. this is controlled by LAB-VIEW software and stores the forces in the computer. there are 27 experiments, and one parameter is changed and two parameters are constant at an experiment. measured the forces and (Ra) is analyzed is by minitab18 software design a regression equation and (ANOVA). The minimum force and (Ra) the experimental (force &surface roughness is nearest to the predicted value
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- 2022
7. Designing and Fabrication of Polymer Based Injection Molding Die Using 3D Printing
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Shivam Singh and Sanjeev Kumar Singh Yadav
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General Medicine - Abstract
The purpose of this study is to design and fabricate the injection molding die with help of designing software and fabricating it with the help fused deposition modelling based 3d printing machine. Emphasis on designing of the injection die is given on the size and shape of the specimen to be molded and on giving a proper shrinkage allowance to the injection molding die for getting the desired dimension of the specimen molded in the injection molding die. Draft analysis of the injection die was carried out on the designed injection die for easy separation of the specimen and the polymer based injection die. Acrylonitrile butadiene styrene (ABS) polymer based filament is used in the fabrication of the injection die using Fused Deposition Modelling (FDM) working principle based 3d printer. The nozzle temperature requirement of the ABS based filament is 250 degree Celsius and the bed temperature required for printing ABS is around 90 degree Celsius which is recommended by the company which manufactures the used ABS based filament. The time consumption in manufacturing of the die is recorded and then compared to the time taken in manufacturing metal based die. This study concludes the optimum value of shrinkage allowance and proper draft analysis and time taken in the manufacturing of the die in the recommended parameters for the printing of the die.
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- 2022
8. α-bisabolol β-D-fucopyranoside inhibits β-amyloid (Aβ)25–35 induced oxidative stress in Neuro-2a cells via antioxidant approaches
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Mahalingam Jeyakumar, Sethuraman Sathya, Soniya Gandhi, Prabhakararao Tharra, Murali Aarthy, Devasahayam Jaya Balan, Chandramohan Kiruthiga, Beeraiah Baire, Sanjeev Kumar Singh, and Kasi Pandima Devi
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Bioengineering ,Applied Microbiology and Biotechnology ,Biochemistry - Published
- 2022
9. Comparative Analysis and Optimization of Thermoelectric Machining of Alumina and Silicon Carbide-Reinforced Aluminum Metal Matrix Composites Using Different Electrodes
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Dhirendra Pratap Singh, Sanjay Mishra, Sanjeev Kumar Singh Yadav, Rajesh Kumar Porwal, and Vivekananda Singh
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Strategy and Management ,Industrial and Manufacturing Engineering ,Computer Science Applications - Abstract
In this paper, a comparative experimental analysis of die-sinking electric discharge machining (EDM) to two most exhaustively used aluminum metal matrix composites (AMMCs) has been performed using Copper and Tungsten as tool electrodes. AMMCs containing silicon carbide (SiC) and alumina (Al2O[Formula: see text] as reinforcement (10[Formula: see text]wt%) were fabricated by stir casting method. The Box–Behnken Design (BBD) approach of response surface methodology was used to develop experimental models for material removal rate (MRR) and surface roughness (SR). Effect of input parameters such as current ([Formula: see text]–12[Formula: see text]A), gap voltage ([Formula: see text][Formula: see text]V), pulse-on time ([Formula: see text]s), and duty factor ([Formula: see text]–6) on the output responses has been investigated with response surface plots. Effectiveness of design of experiment (DoE) and evolutionary algorithm-based multi-objective optimization (MOO) technique have been compared to find the best feasible optimal solution. ANOVA analysis reveals that for alumina reinforced AMMC interaction between [Formula: see text] has significant effect on both MRR and SR using Cu electrode. But for tungsten, electrode interaction between [Formula: see text], [Formula: see text], and [Formula: see text] have major role on MRR whereas SR is mostly influenced by interaction between [Formula: see text] and [Formula: see text]. The parametric analysis reveals that an increase of current from 4[Formula: see text]A to 12[Formula: see text]A at a higher pulse-ontime increases the MRR more significantly, and higher MRR occurs in cases of alumina-reinforced AMMC. Increase of pulse-ontime at low current (4[Formula: see text]A) reduces the MRR in AMMC/Al2O3. Good surface finish can be obtained by combining high voltage (60[Formula: see text]V) with either small current (4[Formula: see text]A) or small duty factor (4) for both AMMCs. Both DoE and metaheuristic-based MOO technique reveals that copper electrode should be preferred for die-sinking EDM of AMMC/SiC. Metaheuristic approach should be preferred for optimization of die-sinking EDM of AMMCs using different electrodes because it requires low current for effective machining of different AMMCs.
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- 2022
10. Corporate Organizational Culture and its Description in Bhagavad Gita
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null Anjali Chugh and null Sanjeev Kumar Singh
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General Medicine - Abstract
Today’s organizations are primarily dynamic and pose huge challenges and opportunities to the policy makers and corporate practitioners. The philosophy of Bhagavad Gita should not only be viewed from spiritual perspectives but also as a guide in developing Managerial Effectiveness. Today it has found its place as an alternative to the theory of modern management and also as a means to bring back the right path of peace and prosperity for the human beings. This research paper measures empirically the effectiveness of organizational corporate culture and its descriptions in Bhagavad Geeta. With this paper we will see the practical message of Bhagavad Gita has strong linkage to core management practices like establishment of good corporate culture.
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- 2022
11. Development and Experimental Study of Electrochemical Diamond Drilling Process on Ti6Al4V
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Mayank Shekhar and Sanjeev Kumar Singh Yadav
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Strategy and Management ,Industrial and Manufacturing Engineering ,Computer Science Applications - Published
- 2023
12. Molecular characterization of Lipopeptide Biosurfactant-Producing Paenibacillus dendritiformis isolated from Brackish water and its Potential Use in Microbial Enhanced Oil Recovery and Bioremediation
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Anuraj Nayarisseri, Ravina Khandelwal, and Sanjeev Kumar Singh
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The biosurfactants produced by microorganisms have high demand from microbial-enhanced oil recovery (MEOR) and they have focused on a chemical surfactant for the past few decades for degrading petro-based pollutants and oil spills due to its non-toxicity and increasing bioavailability. The study aims to identify and screen potential lipopeptide biosurfactant produced by Paenibacillus species employing a design experiment based on RSM. The bacterial culture was isolated from Chilika Lake, India. The data generated from the biosurfactant stability experiments were used to fit a regression model using the parameters such as ph, temp, and salinity to predict the E24 index. R-squared value 0.91 obtained from the ANOVA model explains that the regression model was significant, and the model p-value obtained was < 0.05 and was also statistically significant. Therefore the statistical regression model obtained in the present investigation can predict the E24 index by using any combination of ph, temp, and salinity parameters. The novel isolates obtained in this research were further named Paenibacillus dendritiformis ANSKLAB02 and deposited in GenBank with accession number KU518891. The growth of this species under controlled conditions has a high potential to help in environmental clean-up and is suitable for use in MEOR applications.
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- 2023
13. Structure‐Based Drug Design: Identification of Glucokinase Activators from Natural Compounds for the Treatment of Type 2 Diabetes
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Manokaran Malini, Ramasamy Thilagavathi, Sanjeev Kumar Singh, Arun Pravin, and Chelliah Selvam
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General Chemistry - Published
- 2023
14. Integrated Transcriptome Profiling Identifies Prognostic Hub Genes as Therapeutic Targets of Glioblastoma: Evidenced by Bioinformatics Analysis
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Chirasmita Nayak and Sanjeev Kumar Singh
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General Chemical Engineering ,General Chemistry - Abstract
Glioblastoma (GBM) is the most devastating and frequent type of primary brain tumor with high morbidity and mortality. Despite the use of surgical resection followed by radio- and chemotherapy as standard therapy, the progression of GBM remains dismal with a median overall survival of15 months. GBM embodies a populace of cancer stem cells (GSCs) that is associated with tumor initiation, invasion, therapeutic resistance, and post-treatment reoccurrence. However, understanding the potential mechanisms of stemness and their candidate biomarkers remains limited. Hence in this investigation, we aimed to illuminate potential candidate hub genes and key pathways associated with the pathogenesis of GSC in the development of GBM. The integrated analysis discovered differentially expressed genes (DEGs) between the brain cancer tissues (GBM and GSC) and normal brain tissues. Multiple approaches, including gene ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, were employed to functionally annotate the DEGs and visualize them through the R program. The significant hub genes were identified through the protein-protein interaction network, Venn diagram analysis, and survival analysis. We observed that the upregulated DEGs were prominently involved in the ECM-receptor interaction pathway. The downregulated genes were mainly associated with the axon guidance pathway. Five significant hub genes (CTNNB1, ITGB1, TNC, EGFR, and SHOX2) were screened out through multiple analyses. GO and KEGG analyses of hub genes uncovered that these genes were primarily enriched in disease-associated pathways such as the inhibition of apoptosis and the DNA damage repair mechanism, activation of the cell cycle, EMT (epithelial-mesenchymal transition), hormone AR (androgen receptor), hormone ER (estrogen receptor), PI3K/AKT (phosphatidylinositol 3-kinase and AKT), RTK (receptor tyrosine kinase), and TSC/mTOR (tuberous sclerosis complex and mammalian target of rapamycin). Consequently, the epigenetic regulatory network disclosed that hub genes played a vital role in the progression of GBM. Finally, candidate drugs were predicted that can be used as possible drugs to treat GBM patients. Overall, our investigation offered five hub genes (CTNNB1, ITGB1, TNC, EGFR, and SHOX2) that could be used as precise diagnostic and prognostic candidate biomarkers of GBM and might be used as personalized therapeutic targets to obstruct gliomagenesis.
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- 2022
15. Structure-Based Virtual Screening, Molecular Docking, Molecular Dynamics Simulation and Pharmacokinetic modelling of Cyclooxygenase-2 (COX-2) inhibitor for the clinical treatment of Colorectal Cancer
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Manasi Yadav, Mohnad Abdalla, Maddala Madhavi, Ishita Chopra, Anushka Bhrdwaj, Lovely Soni, Uzma Shaheen, Leena Prajapati, Megha Sharma, Mayank Singh Sikarwar, Sarah Albogami, Tajamul Hussain, Anuraj Nayarisseri, and Sanjeev Kumar Singh
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General Chemical Engineering ,Modeling and Simulation ,General Materials Science ,General Chemistry ,Condensed Matter Physics ,Information Systems - Published
- 2022
16. Transcriptional regulatory mechanisms and signaling networks in cancer
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Chandrabose Selvaraj, Karthik Raja Ramalingam, Devadasan Velmurugan, and Sanjeev Kumar Singh
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- 2023
17. List of contributors
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Anshika Agarwal, Sarah Albogami, Nandadulal Bairagi, Krishnan Balasubramanian, Subhash C. Basak, Emilio Benfenati, Apurba K. Bhattacharjee, Anushka Bhrdwaj, Suman K. Chakravarti, Pratim Kumar Chattaraj, Samrat Chatterjee, Ramana V. Davuluri, Tathagata Dey, Abhik Ghosh, Indira Ghosh, Giuseppina Gini, Lima Hazarika, Guang Hu, Chiakang Hung, Tajamul Hussain, Yanrong Ji, Isha Joshi, Taushif Khan, Ravina Khandelwal, Pawan Kumar, Shivam Kumar, Min Li, Jie Liao, Claudiu N. Lungu, Subhabrata Majumdar, Rama K. Mishra, Manju Mohan, Ashesh Nandy, Anuraj Nayarisseri, Shahul H. Nilar, Ranita Pal, Aditi Pande, Guillermo Restrepo, Dipanka Tanu Sarmah, Dwaipayan Sen, Sanjeev Kumar Singh, Chillamcherla Dhanalakshmi Srija, Revathy Arya Suresh, Muyun Tang, Garima Thakur, Xin Tong, Marjan Vracko, Marjan Vračko, Ze Wang, DanDan Xu, and Guang-Yu Yang
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- 2023
18. Contributors
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K.F. Abdelmotelb, Qasim Ali, Phaniendra Alugoju, Ayesha Anwar, Prahlad Arya (Kumar), Muhammad Arslan Ashraf, Sana Ashraf, Geeta Boken, D.R. Choudhary, Priti Chauhan, Akash Ravindra Chichaghare, Anuj Choudhary, Sami El Khatib, Himani Gautam, Krishna Gautam, Irina F. Golovatskaya, Anshu Gupta, Arslan Hafeez, B.M. Harish, Azamal Husen, Iqbal Hussain, Muhammad Iqbal, Suchisree Jha, Viveka Katoch, Harmanjot Kaur, null Kehkashan, Wajahat Ali Khan, Maha Krayem, Antul Kumar, Pramod Kumar, Pascal Labrousse, Manisha Lakhanpal, Shambhu Krishan Lal, Nikolay I. Laptev, Shivaji Ajinath Lavale, Paul V. Manley, Sahil Mehta, Om Prakash Narayan, Shri Hari Prasad, Hema Prashad, null Preeti, Freeha Fatima Qureshi, Shakeelur Rahman, Smita Rai, Anita Rani, Rizwan Rasheed, Azna Safdar, Pallavi Saxena, Chandrabose Selvaraj, Neeti Sharma, Poonam Sharma, Shivam Sharma, Swati Sharma, Khushboo Singh, Nirmal Singh, Rajlaxmi Singh, Sanjeev Kumar Singh, Shubhra Singh, Saurabh Sonwani, null Sourabh, Saumya Srivastava, Tewin Tencomnao, Stephen M. Via, Ashok Yadav, and Chandrabose Yogeswari
- Published
- 2023
19. Artificial intelligence, big data and machine learning approaches in genome-wide SNP-based prediction for precision medicine and drug discovery
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Isha Joshi, Anushka Bhrdwaj, Ravina Khandelwal, Aditi Pande, Anshika Agarwal, Chillamcherla Dhanalakshmi Srija, Revathy Arya Suresh, Manju Mohan, Lima Hazarika, Garima Thakur, Tajamul Hussain, Sarah Albogami, Anuraj Nayarisseri, and Sanjeev Kumar Singh
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- 2023
20. Contributors
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Maryam Peter Abraham, Peter Abraham, Charles Oluwaseun Adetunji, Juliana Bunmi Adetunji, Eleonora Alfinito, Francisco J. Arraez, Md. Ashrafuzzaman, Lázaro A.M. Castanedo, Rosella Cataldo, Tânia Cova, Dagmar R. D’hooge, Wadzani Palnam Dauda, Dhurvas Chandrasekaran Dinesh, Mariya Edeleva, Peyman Fahimi, Márcio Ferreira, Freddy L. Figueira, Elkanah Glen, Virendra Kumar Gupta, Chidi Nnamdi Ifechukwude, Kehinde Kazeem Kanmodi, Basil Raju Karimadom, Satyajit Khatua, Haya Kornweitz, Jugal Kumawat, Zheng-Hong Luo, Yoshi W. Marien, Lou Massa, Chérif F. Matta, Pedro Maximiano, Jean-Francois Millithaler, Daji Morumda, Lawrence Achilles Nnyanzi, Sandra Nunes, Alberto Pais, Tanmoy Kumar Paul, Divya Rai, Kaushik Rajaram, Paola Rondon-Villarreal, Hemant Sarin, Chandrabose Selvaraj, Sumit Sharma, Pedro Nuno Simões, Sanjeev Kumar Singh, Katarzyna Staszak, Maciej Staszak, Srivignesh Sundaresan, Srabani Taraphder, Jince Thomas, Minu Elizabeth Thomas, Sabu Thomas, Paul H.M. Van Steenberge, Carla Vitorino, Yi-Yang Wu, Le Xie, Radhey Shyam Yadav, and Yin-Ning Zhou
- Published
- 2023
21. Exploring the macromolecules for secretory pathway in cancer disease
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Chandrabose Selvaraj, Umesh Panwar, Karthik Raja Ramalingam, Rajendran Vijayakumar, and Sanjeev Kumar Singh
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- 2023
22. Enhanced Sampling and Free Energy Methods to Study Protein Folding and Dynamics
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Muthuraja Arun Pravin and Sanjeev Kumar Singh
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- 2023
23. Macromolecular chemistry: An introduction
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Chandrabose Selvaraj, Dhurvas Chandrasekaran Dinesh, Kaushik Rajaram, Srivignesh Sundaresan, and Sanjeev Kumar Singh
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- 2023
24. Histopathological pattern of endometrium in infertility patient
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Geeta Maurya, Vaibhav Kanti, Sanjeev Kumar Singh, Pinky Pandey, Sanjay Kannaujia, Rashmi Rashmi, Granth Kumar, and Amit Varshney
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General Nursing ,Education - Abstract
Infertility is defined as difficulty in conceiving children after regular and unprotected coitus for at least one year. Many investigative measures are available now a day to identify the cause of infertility so clinician can assess the chance of achieving pregnancy in couples. Morphology of endometrium is very useful indicator of ovarian function. Our study aims to see the different pattern of endometrium histologically in female infertility patient. We tried to assess the significance anovulatory cycle and incidence of tuberculous endometritis. Study was done in pathology department of UPUMS, Saifai, Etawah. Eighty-four (84) cases of primary and secondary infertility were included in this study. Endometrial biopsy tissues were processed and stained with hematoxylin and eosin stain according to the standard procedure. Out of 84 cases 48(57%) were of primary infertility and 36 (42.85%) were of secondary infertility. Majority of the infertility patient fell in age group of 21 to 30 years. Out of 84 cases 42 (50%) cases showed proliferative endometrium and 33(39.2%) cases showed secretory endometrium. Tuberculous endometritis seen in 2 (2.3%) cases. In present study percentage of anovulatory endometrium was 52.5%, endometrial biopsy is cost-effective, safe and efficient diagnostic tool in cases of both primary and secondary infertility.
- Published
- 2022
25. Risk Factors in Development of Early Childhood Caries in 12–18-month-old Indian Children: A Prospective Study
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Harpinder Singh Chawla, Krishan Gauba, Ashima Goyal, Sanjeev Kumar Singh, and Puneeth Wadhwa
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- 2022
26. Oral Health-related Quality of Life of Children with Early Childhood Caries before and after Receiving Complete Oral Rehabilitation under General Anesthesia
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Raja, Raghu, Krishan, Gauba, Ashima, Goyal, Aditi, Kapur, Arpit, Gupta, and Sanjeev Kumar, Singh
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Pediatrics, Perinatology and Child Health ,Periodontics ,Orthodontics ,Oral Surgery - Abstract
Early childhood caries (ECC) significantly affects the quality of life of children due to recurrent pain, infection, and other associated problems.To assess the change in oral health-related quality of life of children aged5 years undergoing complete oral rehabilitation under general anesthesia.A total of 50 healthy children affected with ECC were enrolled for the present study. Oral health-related quality of life (OHRQoL) of every child was assessed by interviewing the mothers using a prevalidated Early Childhood Oral Health Impact Scale (ECOHIS) questionnaire one day prior to the treatment appointment and comparing the scores with those at 1 and 3 months post-treatment to evaluate the changes in the OHRQoL, if any and assess the stability of the changes.The results revealed a statistically significant reduction in Ouality of Life (QoL) scores of all the domains and total ECOHIS scores between baseline and 1 month, and baseline and 3 months.Raghu R, Gauba K, Goyal A
- Published
- 2022
27. Internet GIS-Based Air Quality Monitoring and Forecast System for the Indian Region Using FOSS4G
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Kapil Oberai, Sameer Saran, Ashutosh Kumar Jha, Charu Singh, Yogesh Kant, Shuchita Srivastava, Sanjeev Kumar Singh, Debashis Mitra, and Prakash Chauhan
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Geography, Planning and Development ,Earth and Planetary Sciences (miscellaneous) - Published
- 2022
28. Analysis of surface roughness during Machining of AISI H-13 steel using EDDFG
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Versha Nigam and Sanjeev Kumar Singh Yadav
- Published
- 2022
29. A Review on Pharmacokinetics Properties of Antiretroviral Drugs to Treat HIV-1 Infections
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Krishna Kant Gupta, Mohd. Aqueel Khan, and Sanjeev Kumar Singh
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Anti-HIV Agents ,medicine.medical_treatment ,HIV Infections ,Pharmacology ,Gp41 ,Pharmacokinetics ,Drug Discovery ,Humans ,Medicine ,Distribution (pharmacology) ,Protease ,biology ,business.industry ,Transmission (medicine) ,virus diseases ,HIV Protease Inhibitors ,General Medicine ,Reverse transcriptase ,Integrase ,Bioavailability ,Pharmaceutical Preparations ,HIV-1 ,biology.protein ,Reverse Transcriptase Inhibitors ,Molecular Medicine ,business - Abstract
Background: The HIV-1 pandemic is undoubtedly the major public-health crisis of our time. The extensive research on HIV has deepened our understanding of its pathogenesis and transmission dynamics. Some new entity molecules have been approved by the FDA for HIV treatment but till now protective vaccine remains elusive. Scientists are targeting many important proteins of HIV-1; gp41, gp120, CCR5 coreceptor, integrase, reverse transcriptase and protease. Few compounds are used as nucleotide analogues to stop HIV replication. Altogether, these compounds and their derivatives specifically block HIV entry and DNA replication. Using ADMET studies, people are working on these compounds to reduce toxicity and increase potency. Objective: Our main aim is to discuss the Pharmacokinetics properties of 23 important FDA antiretroviral drugs used for the treatment of HIV-1 infections. Methods: We have searched literature related to pharmacokinetics properties in PubMed, Google Scholar search engine. Conclusion: Here, we have reviewed the pharmacokinetic properties such as absorption, bioavailability, distribution, metabolism, and excretion, of important 23 FDA approved drugs. The drugs namely Fuzeon, Selzentry, Complera, Epivir, Retrovir, Emtriva, Ziagen, Edurant, Intelence, Pifeltro, Sustiva, Viramune, Isentress, Genvoya, Tivicay, Reyataz, Prezista, Lexiva, Invirase, Aptivus etc. are classified into five major classes: fusion inhibitors, Nucleoside/Nucleotide Reverse Transcriptase Inhibitors (NRTIs), Non-Nucleoside Reverse Transcriptase Inhibitors (NNRTIs), Integrase Strand transfer inhibitors (INSTIs) and Protease inhibitors (PIs). This Review may helpful for the future development of potent antiretroviral drugs with improved pharmacokinetic properties.
- Published
- 2021
30. Antecedents of Green Marketing Initiatives
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Rinku Sanjeev and Sanjeev Kumar Singh
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Green marketing ,Environmental Engineering ,Ecology ,Multilevel model ,Business ,Management, Monitoring, Policy and Law ,Development ,Marketing - Abstract
This paper examines the drivers that influence the green marketing awareness and addresses the role of corporate social responsibility (CSR) as a mediator. Data was collected from 250 respondents by self-administered questionnaire through convenience sampling. The results indicate that competitive advantage, environmental sustainability, green purchase intention are significant influencers for green marketing awareness. CSR enjoys a positive and significant mediating effect on the relationship between the independent variables and green marketing. CSR mediates the relationship between environmental sustainability (ES), competitive advantage (CA) and green purchase intention (GPI) which can provide insights for corporates with respect to the factors influencing green marketing awareness. Also, this paper highlights the importance of green purchase intention, competitive advantage, environmental sustainability and their linkage towards green marketing awareness.
- Published
- 2021
31. Lipid profile as an indicator of COVID-19 severity: A systematic review and meta-analysis
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Rakesh Kumar Shah, Roshan Kumar Mahat, Vedika Rathore, Chanchal Garg, Neelima Singh, Sanjeev Kumar Singh, and Nivedita Singh
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medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,MEDLINE ,Total Cholesterol ,Internal medicine ,Humans ,Medicine ,Low-Density Lipoprotein Cholesterol ,High-Density Lipoprotein Cholesterol ,Nutrition and Dietetics ,medicine.diagnostic_test ,SARS-CoV-2 ,business.industry ,Cholesterol, HDL ,COVID-19 ,Cholesterol, LDL ,Fixed effects model ,medicine.disease ,Random effects model ,Lipids ,Confidence interval ,Study heterogeneity ,Meta-analysis ,lipids (amino acids, peptides, and proteins) ,business ,Lipid profile ,Dyslipidemia ,Meta-Analysis - Abstract
Summary Background Coronavirus disease-2019 (COVID-19) is a global pandemic. Studies reported dyslipidemia in patients with COVID-19. Herein, we conducted a systematic review and meta-analysis of published articles to evaluate the association of the lipid profile with the severity and mortality in COVID-19 patients. Methods PubMed/Medline, Europe PMC, and Google Scholar were searched for studies published between January 1, 2020 and January 13, 2021. Random or Fixed effects models were used to calculate the mean difference (MD) and 95% confidence intervals (CIs). Statistical heterogeneity was assessed using Cochran's Q test and I2 statistics. Results This meta-analysis included 19 studies. Of which, 12 studies were categorized by severity, 04 studies by mortality, and 03 studies by both severity and mortality. Our findings revealed significantly decreased levels of total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) in the severe group when compared with the non-severe group in a random effect model. Similarly, random effect model results demonstrated significantly lower levels of HDL-C and LDL-C in the non-survivor group when compared with the survivor group. The level of TC was also found to be decreased in the non-survivor group when compared to the survivor group in a fixed-effect model. Conclusion In conclusion, the lipid profile is associated with both the severity and mortality in COVID-19 patients. Hence, the lipid profile may be used for assessing the severity and prognosis of COVID-19. Prospero registration number CRD42021216316 .
- Published
- 2021
32. Improving Patient Health in Smart Healthcare Monitoring Systems using IoT
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M Senbagavalli and Sanjeev Kumar Singh
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- 2022
33. Designing of electrochemical cut-off grinding process of Ti–6Al–4V
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Sunil Kumar Yadav and Sanjeev Kumar Singh Yadav
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Modeling and Simulation ,Industrial and Manufacturing Engineering - Published
- 2022
34. Exploring the Shock and Kill Strategy to Eradicate Latent HIV-1 Infection
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Mohd. Aqueel Khan, Rajaram Abhirami, and Sanjeev Kumar Singh
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- 2022
35. A Comparative Evaluation of CPP-ACP Cream and Fluoride Varnish in Remineralization of MIH-affected Teeth Using Laser Fluorescence
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Sanjeev Kumar Singh, Mrinalini Rathore, Ashima Goyal, and Krishan Gauba
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Remineralisation ,Chemistry ,business.industry ,Fluoride varnish ,Laser fluorescence ,Dentistry ,Molar Incisor Hypomineralization ,business ,Comparative evaluation - Published
- 2021
36. Interrogation of Bacillus anthracis SrtA active site loop forming open/close lid conformations through extensive MD simulations for understanding binding selectivity of SrtA inhibitors
- Author
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Rajendran Vijayakumar, Chandrabose Selvaraj, Dong-Qing Wei, Gurudeeban Selvaraj, Sanjeev Kumar Singh, Randa Mohamed Ismail, and Alaa Baazeem
- Subjects
0106 biological sciences ,0301 basic medicine ,QH301-705.5 ,Molecular dynamics ,01 natural sciences ,Cell wall ,03 medical and health sciences ,Sortase ,Binding site ,Biology (General) ,Cell adhesion ,Binding selectivity ,biology ,Chemistry ,QSAR ,fungi ,Biofilm ,Active site ,biology.organism_classification ,Bacillus anthracis ,030104 developmental biology ,Pharmacophore modelling ,Biophysics ,biology.protein ,Original Article ,General Agricultural and Biological Sciences ,010606 plant biology & botany - Abstract
Bacillus anthracis is a gram positive, deadly spore forming bacteria causing anthrax and these bacteria having the complex mechanism in the cell wall envelope, which can adopt the changes in environmental conditions. In this, the membrane bound cell wall proteins are said to progressive drug target for the inhibition of Bacillus anthracis. Among the cell wall proteins, the SrtA is one of the important mechanistic protein, which mediate the ligation with LPXTG motif by forming the amide bonds. The SrtA plays the vital role in cell signalling, cell wall formation, and biofilm formations. Inhibition of SrtA leads to rupture of the cell wall and biofilm formation, and that leads to inhibition of Bacillus anthracis and thus, SrtA is core important enzyme to study the inhibition mechanism. In this study, we have examined 28 compounds, which have the inhibitory activity against the Bacillus anthracis SrtA for developing the 3D-QSAR and also, compounds binding selectivity with both open and closed SrtA conformations, obtained from 100 ns of MD simulations. The binding site loop deviate in forming the open and closed gate mechanism is investigated to understand the inhibitory profile of reported compounds, and results show the closed state active site conformations are required for ligand binding specificity. Overall, the present study may offer an opportunity for better understanding of the mechanism of action and can be aided to further designing of a novel and highly potent SrtA inhibitors.
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- 2021
37. Intrinsically disordered proteins in viral pathogenesis and infections
- Author
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Chandrabose, Selvaraj, Muthuraja Arun, Pravin, Wardah A, Alhoqail, Anuraj, Nayarisseri, and Sanjeev Kumar, Singh
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Intrinsically Disordered Proteins ,Viral Proteins ,Proteome ,Protein Conformation - Abstract
Disordered proteins serve a crucial part in many biological processes that go beyond the capabilities of ordered proteins. A large number of virus-encoded proteins have extremely condensed proteomes and genomes, which results in highly disordered proteins. The presence of these IDPs allows them to rapidly adapt to changes in their biological environment and play a significant role in viral replication and down-regulation of host defense mechanisms. Since viruses undergo rapid evolution and have a high rate of mutation and accumulation in their proteome, IDPs' insights into viruses are critical for understanding how viruses hijack cells and cause disease. There are many conformational changes that IDPs can adopt in order to interact with different protein partners and thus stabilize the particular fold and withstand high mutation rates. This chapter explains the molecular mechanism behind viral IDPs, as well as the significance of recent research in the field of IDPs, with the goal of gaining a deeper comprehension of the essential roles and functions played by viral proteins.
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- 2022
38. Unraveling the multi-targeted curative potential of bioactive molecules against cervical cancer through integrated omics and systems pharmacology approach
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Murali, Aarthy, Pandiyan, Muthuramalingam, Manikandan, Ramesh, and Sanjeev Kumar, Singh
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Multidisciplinary ,Papillomavirus E7 Proteins ,Papillomavirus Infections ,Humans ,Uterine Cervical Neoplasms ,Female ,Oncogene Proteins, Viral ,Network Pharmacology ,Transcriptome - Abstract
Molecular level understanding on the role of viral infections causing cervical cancer is highly essential for therapeutic development. In these instances, systems pharmacology along with multi omics approach helps in unraveling the multi-targeted mechanisms of novel biologically active compounds to combat cervical cancer. The immuno-transcriptomic dataset of healthy and infected cervical cancer patients was retrieved from the array express. Further, the phytocompounds from medicinal plants were collected from the literature. Network Analyst 3.0 has been used to identify the immune genes around 384 which are differentially expressed and responsible for cervical cancer. Among the 87 compounds reported in plants for treating cervical cancer, only 79 compounds were targeting the identified immune genes of cervical cancer. The significant genes responsible for the domination in cervical cancer are identified in this study. The virogenomic signatures observed from cervical cancer caused by E7 oncoproteins serve as the potential therapeutic targets whereas, the identified compounds can act as anti-HPV drug deliveries. In future, the exploratory rationale of the acquired results will be useful in optimizing small molecules which can be a viable drug candidate.
- Published
- 2022
39. Atom-based 3D-QSAR and DFT analysis of 5-substituted 2-acylaminothiazole derivatives as HIV-1 latency-reversing agents
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Mohammad Aqueel Khan and Sanjeev Kumar Singh
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Structural Biology ,General Medicine ,Molecular Biology - Abstract
HIV-1 latency consists of viral DNA; integrated inside the host genome; it remains transcriptional silent. Combined Antiretroviral Therapy (cART) and the host immune system fail to recognize the latency cells or reservoirs, representing a major barrier to eradicating the HIV-1 infection. The Shock and Kill emerged as a promising strategy to target these cells using Latency reversal agents (LRAs); partially succeeded in producing viral mRNA but failed to reduce the size of reservoirs. In this Context, 2-acylaminothiazole class derivatives appeared as promising HIV-1 latency-reversing agents. In this study, we have developed an atom-based 3 D-QSAR model by utilizing the 49 active compounds of the 5-substituted 2-acylaminothiazoles derivatives. These compounds are further randomly divided into training (37) and test (12) datasets, yielding statistically significant R
- Published
- 2022
40. Stationary Conditions and Characterizations of Solution Sets for Interval-Valued Tightened Nonlinear Problems
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Kin Keung Lai, Shashi Kant Mishra, Sanjeev Kumar Singh, and Mohd Hassan
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nonlinear programming ,switching constraints ,stationary conditions ,interval-valued optimization ,General Mathematics ,Computer Science (miscellaneous) ,Engineering (miscellaneous) - Abstract
In this paper, we obtain characterizations of solution sets of the interval-valued mathematical programming problems with switching constraints. Stationary conditions which are weaker than the standard Karush–Kuhn–Tucker conditions need to be discussed in order to find the necessary optimality conditions. We introduce corresponding weak, Mordukhovich, and strong stationary conditions for the corresponding interval-valued mathematical programming problems with switching constraints (IVPSC) and interval-valued tightened nonlinear problems (IVTNP), because the W-stationary condition of IVPSC is equivalent to Karush–Kuhn–Tucker conditions of the IVTNP. Furthermore, we use strong stationary conditions to characterize the several solutions sets for IVTNP, in which the last ones are particular solutions sets for IVPSC at the same time, because the feasible set of tightened nonlinear problems (IVTNP) is a subset of the feasible set of the mathematical programs with switching constraints (IVPSC).
- Published
- 2022
- Full Text
- View/download PDF
41. Comparative Study of Tensile Properties of 17-4PH Using ADAM and Conventional Process
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Shivam Sachan and Sanjeev Kumar Singh Yadav
- Subjects
SLS ,ADAM ,SLA - Abstract
This present work aims to compare the Tensile properties of 17-4PH stainless steel with two different processes. The first is the ADAM Atomic Diffusion Additive Manufacturing process, and the second process is making a sample for 17-4PH with a metal plate. Markforged ADAM is a patented process for Additive Manufacturing Process Metal Extrusion by Markforged. In this process, the 17-4PH metal powder is converted into a wire filament, and the filament is prepared with metal powder encased in a plastic binder. The ADAM process consists of three processes. 1. Printing, 2. Washing 3. Sintering. In WASH chamber filled with specific liquid under which green part is kept for dissolving the binding substance available in the printed part, leaving the part semi-porous so that the remaining binder may easily burn during sintering. This debinding step cleans your sintering furnace and purifies the finished metal part. The Sinter-2 fits the whole construction volume of the Metal X thanks to its sizeable active hot zone (more than 22,280 cubic cm). It's ideal for large-scale production or batch production. This heavy-duty furnace sinters a wide variety of commercial-grade metals from their brown (washed) state to fully dense metal pieces. The second Sample is made from a 17-4PH stainless steel plate. With the help of some non-conventional machines, the required dogbone shape for the tensile test can be achieved.
- Published
- 2022
- Full Text
- View/download PDF
42. Viral hijacking mechanism in humans through protein-protein interactions
- Author
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Chandrabose, Selvaraj, Gurunathan Rubha, Shri, Rajendran, Vijayakumar, Abdulaziz S, Alothaim, Saravanan, Ramya, and Sanjeev Kumar, Singh
- Subjects
Viral Proteins ,Host Microbial Interactions ,Humans - Abstract
Numerous viruses have evolved mechanisms to inhibit or alter the host cell's apoptotic response as part of their coevolution with their hosts. The analysis of virus-host protein interactions require an in-depth understanding of both the viral and host protein structures and repertoires, as well as evolutionary mechanisms and pertinent biological facts. Throughout the course of a viral infection, there is constant battle for binding between virus and cellular proteins. Exogenous interfaces facilitating viral-host interactions are well known for constantly targeting and suppressing endogenous interfaces mediating intraspecific interactions, such as viral-viral and host-host connections. In these interactions, the protein-protein interactions (PPIs), are mostly shown as networks (protein interaction networks, PINs), with proteins represented as nodes and their interactions represented as edges. Host proteins with a higher degree of connectivity are more likely to interact with viral proteins. Due to technical advancements, three-dimensional interactions may now be visualized computationally utilizing molecular modeling and cryo-EM approaches. The uniqueness of viral domain repertoires, their evolution, and their activities during viral infection make viruses fascinating models for research. This chapter aims to provide readers a complete picture of the viral hijacking mechanism in protein-protein interactions.
- Published
- 2022
43. Firecracker Maxillofacial Injury in a 6-Year-Old Child- A Case Report
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Sanjeev Kumar Singh, Mohammad Muneeb Mubashir, Nagarajan Sirini, Khushboo Bhalla, and Aditi Kapur
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Face ,Microstomia ,Humans ,Female ,Maxillofacial Injuries ,General Medicine ,Burns ,Child - Abstract
The present case report highlights the management of a 6 years old female child who suffered oral and maxillofacial injury due to explosion of a fire cracker inside the mouth which was managed by primary closure after complete debridement and to prevent the post treatment microstomia, a modified microstomia prevention intraoral prosthetic appliance was given and followed up for 15 months.
- Published
- 2022
44. Artificial Intelligence, Big Data and Machine Learning Approaches in Precision Medicine & Drug Discovery
- Author
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Anuraj Nayarisseri, Sanjeev Kumar Singh, Alejandro Speck-Planche, Maddala Madhavi, Ravina Khandelwal, Garima Thakur, Poonam Tanwar, and Diksha Sharma
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Big Data ,Quantitative structure–activity relationship ,Computer science ,Clinical Biochemistry ,Decision tree ,Ligands ,Machine learning ,computer.software_genre ,030226 pharmacology & pharmacy ,Machine Learning ,03 medical and health sciences ,0302 clinical medicine ,Artificial Intelligence ,Drug Discovery ,Humans ,Precision Medicine ,Pharmacology ,Virtual screening ,Artificial neural network ,business.industry ,Drug discovery ,Support vector machine ,Drug repositioning ,Pharmaceutical Preparations ,Drug development ,030220 oncology & carcinogenesis ,Molecular Medicine ,Artificial intelligence ,business ,computer - Abstract
Artificial Intelligence revolutionizes the drug development process that can quickly identify potential biologically active compounds from millions of candidate within a short period. The present review is an overview based on some applications of Machine Learning based tools, such as GOLD, Deep PVP, LIB SVM, etc. and the algorithms involved such as support vector machine (SVM), random forest (RF), decision tree and Artificial Neural Network (ANN), etc. at various stages of drug designing and development. These techniques can be employed in SNP discoveries, drug repurposing, ligand-based drug design (LBDD), Ligand-based Virtual Screening (LBVS) and Structure- based Virtual Screening (SBVS), Lead identification, quantitative structure-activity relationship (QSAR) modeling, and ADMET analysis. It is demonstrated that SVM exhibited better performance in indicating that the classification model will have great applications on human intestinal absorption (HIA) predictions. Successful cases have been reported which demonstrate the efficiency of SVM and RF models in identifying JFD00950 as a novel compound targeting against a colon cancer cell line, DLD-1, by inhibition of FEN1 cytotoxic and cleavage activity. Furthermore, a QSAR model was also used to predict flavonoid inhibitory effects on AR activity as a potent treatment for diabetes mellitus (DM), using ANN. Hence, in the era of big data, ML approaches have been evolved as a powerful and efficient way to deal with the huge amounts of generated data from modern drug discovery to model small-molecule drugs, gene biomarkers and identifying the novel drug targets for various diseases.
- Published
- 2021
45. Experiments and simulation on ZIKV NS2B-NS3 protease reveal its complex folding
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Murali Aarthy, Sanjeev Kumar Singh, Rajanish Giri, Prateek Kumar, and Ankur Kumar
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Protein Folding ,Saliva ,Viral protein ,medicine.medical_treatment ,Equilibrium unfolding ,Viral Nonstructural Proteins ,Biology ,medicine.disease_cause ,Protein Structure, Secondary ,Viral Proteins ,03 medical and health sciences ,Virology ,medicine ,Vaginal secretion ,030304 developmental biology ,0303 health sciences ,NS3 ,Protease ,Zika Virus Infection ,Serine Endopeptidases ,030302 biochemistry & molecular biology ,Zika Virus ,Hydrogen-Ion Concentration ,Folding (chemistry) ,Biochemistry ,Ph range ,Protein Binding - Abstract
Zika virus has been identified in various body fluids such as semen, urine, saliva, cerebrospinal fluid, and vaginal secretion of an infected individual. The pH of these fluids varies from mildly acidic to mildly alkaline. So it is imperative to understand the impact of these conditions on viral protein functioning. We investigated the NS2B-NS3 protease stability and its activity in different denaturing environments. Finding indicates that NS2B-NS3 protease maintains stability at pH 4.8–8.7. Thus it suggests that the complex remains functionally active to hydrolyze the polyprotein within a diverse environmental condition such as variable pH. Despite a stable structure at a broad pH range, a change in environmental conditions dramatically influence its protease activity. Moreover, it is susceptible to structural transformation leading to increased β-strand or helix content in the presence of alcohol. This study may help further to understand the folding-function relationship of the general flaviviral protease complex.
- Published
- 2021
46. Structure-Based Virtual Screening, Molecular Docking, Molecular Dynamics Simulation of EGFR for the clinical treatment of Glioblastoma
- Author
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Anushka Bhrdwaj, Mohnad Abdalla, Aditi Pande, Maddala Madhavi, Ishita Chopra, Lovely Soni, Natchimuthu Vijayakumar, Umesh Panwar, Mohd. Aqueel Khan, Leena Prajapati, Deepika Gujrati, Pranoti Belapurkar, Sarah Albogami, Tajamul Hussain, Chandrabose Selvaraj, Anuraj Nayarisseri, and Sanjeev Kumar Singh
- Subjects
Bioengineering ,General Medicine ,Molecular Biology ,Applied Microbiology and Biotechnology ,Biochemistry ,Biotechnology - Abstract
Glioblastoma (GBM) is a WHO Grade IV tumor with poor visibility, a high risk of comorbidity, and limited treatment options. Resurfacing from second-rate glioma was originally classified as either mandatory or optional. Recent interest in personalized medicine has motivated research toward biomarker stratification-based individualized illness therapy. GBM biomarkers have been investigated for their potential utility in prognostic stratification, driving the development of targeted therapy, and customizing therapeutic treatment. Due to the availability of a specific EGFRvIII mutational variation with a clear function in glioma-genesis, recent research suggests that EGFR has the potential to be a prognostic factor in GBM, while others have shown no clinical link between EGFR and survival. The pre-existing pharmaceutical lapatinib (PubChem ID: 208908) with a higher affinity score is used for Structure-based Virtual Screening. As a result, the current study revealed a newly screened chemical (PubChem CID: 59671768) with a higher affinity than the previously known molecule. When the two compounds are compared, the former has the lowest re-rank score. The time-resolved features of a virtually screened chemical and an established compound were investigated using Molecular Dynamics Simulation. Both compounds are equivalent, according to the ADMET study. This report implies that the virtual screened chemical could be a promising Glioblastoma therapy.
- Published
- 2022
47. Embelia ribes (False Black Pepper) and Gymnema sylvestre (Sugar Destroyer)
- Author
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Chandrabose Selvaraj, Chandrabose Yogeswari, and Sanjeev Kumar Singh
- Published
- 2022
48. Structure and chemistry of enzymatic active sites that play a role in the switch and conformation mechanism
- Author
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Chandrabose, Selvaraj, Ondipilliraja, Rudhra, Abdulaziz S, Alothaim, Mustfa, Alkhanani, and Sanjeev Kumar, Singh
- Subjects
Models, Molecular ,Binding Sites ,Protein Conformation ,Catalytic Domain ,Amino Acids ,Crystallography, X-Ray ,Substrate Specificity - Abstract
Enzymes, which are biological molecules, are constructed from polypeptide chains, and these molecules are activated through reaction mechanisms. It is the role of enzymes to speed up chemical reactions that are used to build or break down cell structures. Activation energy is reduced by the enzymes' selective binding of substrates in a protected environment. In enzyme tertiary structures, the active sites are commonly situated in a "cleft," which necessitates the diffusion of substrates and products. The amino acid residues of the active site may be far apart in the primary structure owing to the folding required for tertiary structure. Due to their critical role in substrate binding and attraction, changes in amino acid structure at or near the enzyme's active site usually alter enzyme activity. At the enzyme's active site, or where the chemical reactions occur, the substrate is bound. Enzyme substrates are the primary targets of the enzyme's active site, which is designed to assist in the chemical reaction. This chapter elucidates the summary of structure and chemistry of enzymes, their active site features, charges and role of water in the structures to clarify the biochemistry of the enzymes in the depth of atomic features.
- Published
- 2022
49. Structural insights into conformational stability of ESR1 and structure base screening of new potent inhibitor for the treatment of Breast Cancer
- Author
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Ishita Chopra, Umesh Panwar, Anushka Bhrdwaj, Maddala Madhavi, Lovely Soni, Khushboo Sharma, Abhyuday Singh Parihar, Vineeth Pazharathu Mohan, Leena Prajapati, Isha Joshi, Rashmi Sharma, Shweta Agrawal, Sarah Albogami, Khalid J Alzahrani, Tajamul Hussain, Anuraj Nayarisseri, and Sanjeev Kumar Singh
- Abstract
Estrogen receptor alpha (ERα), a nuclear receptor protein encoded by the estrogen receptor1 (ESR1) gene, is an important biomarker in breast cancer diagnosis. Any dysregulation in its expression can actively implicate the development and progression of the disease. ERα is abnormally expressed in around 60% of the active cases, making it an important therapeutic target. In this study, we report the application of computational approaches to identify suitable drug-like molecules, which share similar ligand binding dynamics with ERα. Structure-based virtual screening(SBVS), docking, and inhibitor dynamics are used to study the ligand binding and interaction profiling of the anticipated ligand molecule, at the active site of the 4-hydroxytamoxifen (OHT) protein (PDB Id: 3ERT). SBVS analysis follows HTVS, SP, and XP protocol in comparison to the ZINC and NCI, to retrieve 20bestligandhits as effective inhibitors; All the compounds have shown significant interaction with active site residues (Leu346, Thr347, Asp351, Glu353, Trp383, Leu387, and Arg394) of the 4-hydroxytamoxifen. Moreover, the docking study was used to screen the top 5 compounds: ZINC13377936, NCI35753, ZINC35465238, ZINC14726791, and NCI663569. We also, employed molecular dynamics simulations to explore the binding dynamics present at the atomic level. Our MDS results have revealed the compounds (ZINC13377936 and NCI35753) with outstanding binding stability and lesser fluctuations. Both above hits possess a high potential as future therapeutic agents, acting by the mechanism of competitive inhibition against the ERα protein in breast cancer.
- Published
- 2022
50. Assessment of WRF-CHEM Simulated Dust Using Reanalysis, Satellite Data and Ground-Based Observations
- Author
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Charu Singh, Akshay Rajeev, Sanjeev Kumar Singh, and Prakash Chauhan
- Subjects
geography ,geography.geographical_feature_category ,Geography, Planning and Development ,Northern Hemisphere ,Storm ,Mineral dust ,Atmosphere ,Prevailing winds ,Peninsula ,Climatology ,Weather Research and Forecasting Model ,Earth and Planetary Sciences (miscellaneous) ,Environmental science ,Air quality index - Abstract
One of the significant natural pollutants in the atmosphere is the mineral dust aerosols. In the northern hemisphere, Arabian Peninsula is one of the significant sources of dust aerosols with the frequency of dust storms changing seasonally. Dust emitted from the Arabian Peninsula region transports towards the Indian region through prevailing winds, therefore a positive correlation between the extreme dust episodes over the Arabian region and air quality over the Indian region is generally observed. Therefore, there is a need to monitor and forecast such an episodic event over the Arabian Peninsula and surrounding regions so that substantial measures may be taken in Indian subcontinent to mitigate the adverse impact of low air quality on human being and several other sectors such as aviation, energy and infrastructure. In the present study, the WRF-Chem simulations for dust particles are assessed against the observational data sets (i.e. MERRA-2, MODIS-Terra, Aura-OMI, CPCB). Based on the comparison of WRF-Chem simulated data sets with the satellite/reanalysis data, it is noted that in the post-monsoon season, WRF-Chem model can capture the entire dust episode (emission, transportation and dissipation) reasonably well. From the statistical analysis (PDF, CDF, Scatter plot and Temporal evolution), it was noted that there was a consistent underestimation of the simulated dust by WRF-Chem as compared to the observational data sets. A statistically robust categorical analysis has also been carried out for assessing the performance of WRF-Chem with respect to the observations for each dust event, and it is noted that on an average the probability of detection of dust event is about 77% and false alarm ratio is about 15% with an overall accuracy of 76%. Results obtained from the present analysis are encouraging and would be useful for the assessment of WRF-Chem simulations for other seasons also.
- Published
- 2021
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