Browsing by Author "Brijesh Kumar Yadav"

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Analyzing the influence of customer relationship management on firm performance: A study of hotel industry in India
(IGI Global, 2017) Brijesh Kumar Yadav; Abhijeet Singh
Today, companies have come to realize that customers are the foundation of a business and effective relationship management is indispensable for the success of an organisation. Hence, one of the most important objectives of a company is to satisfy its customers as they are the backbone and keep a business running. Moreover, it is being witnessed that customer's needs and buying behaviour have changed considerably. In order to meet ever changing demands, organisations need to adopt customer oriented marketing strategies to gain competitive advantage. Since customers nowadays are becoming more price sensitive and shift loyalty frequently in terms of selecting products and services of any company, it has become very difficult to retain them. As a result, emphasis on long term relationships with customers has gained momentum in businesses. The goal of the present study is to expand the study of customer relationship management (CRM) by investigating the association of dimensions of CRM and organizational performance. The study extends customer relationship management to the hotel industry context. It explores a set of CRM dimensions or constructs that are important for implementing CRM in hotel industry in Indian perspective. © 2018 by IGI Global. All rights reserved.
CCSO nano catalyzed solid phase synthesis of 3-oxo-5,6-disubstituted-2,3-dihydropyridazine-4-carbonitrile
(Royal Society of Chemistry, 2014) Praveen Singh; Ranjeet Kumar; Brijesh Kumar Yadav; Ranjana S. Khanna; Ashish Kumar Tewari
Co-doped Ce0.94Ca0.05Sr0.01O1.94 (CCSO) nano particles have been successfully synthesized by an auto-combustion method and were characterized by XRD, TEM and AFM analyses. The catalytic activity of the nano-catalyst is evaluated by the synthesis of substituted pyridazines from substituted benzil and cyano acetylhydrazide, which have great biological and pharmaceutical interest. Thus, a highly economically efficient one-pot solvent free synthesis of pyridazine was developed, which is promoted by the CCSO nano catalyst. The benefits of the reaction are its very short time (2-4 min) and high yields (90-95%). The method offers a highly convergent, inexpensive, and functionality-tolerable procedure for rapid access to important pyridazine compounds in good yields. This journal is © the Partner Organisations 2014.
Click inspired novel pyrazole-triazole-persulfonimide & pyrazole-triazole-aryl derivatives; Design, synthesis, DPP-4 inhibitor with potential anti-diabetic agents
(Academic Press Inc., 2022) Manisha Nidhar; Shaziya Khanam; Priyanka Sonker; Priya Gupta; Archisman Mahapatra; Swaraj Patil; Brijesh Kumar Yadav; Rahul Kumar Singh; Ashish Kumar Tewari
This work presented the first report on designing, synthesizing of novel pyrazole-triazole-persulfonimide (7a-i) and pyrazole-triazole-aryl derivatives (8a-j) via click reaction using CuI catalyst and evaluated for their anti-diabetic activity and DPP-4 inhibitory effect. Click reactions went smoothly with CuI catalyst in the presence of tridentate chelating ligands and produced copper-free target pyrazole-triazole-persulfonimide analogues in excellent yield at RT. The designed compounds were docked against DPP-4 enzyme and showed excellent interaction with active amino acids residue. Further, all novel pyrazole-triazole-persulfonimide and pyrazole-triazole derivatives were subjected to enzyme-based in vitro DPP-4 inhibitory activity. Based on the SAR study DPP-4 inhibitory capacity compounds 7f (9.52 nM) and 8h (4.54 nM) possessed the significant inhibition of DPP-4. Finally compounds 7f and 8h were evaluated for their in vivo anti-diabetic activity using STZ induced diabetic mice model, and 8h showed a significant diabetic control effect compared to the sitagliptin drug. These studies demonstrated that the novel pyrazole-triazole-persulfonimide and pyrazole-triazole-aryl derivatives might be used as the leading compounds to develop novel DPP-4 inhibitors as potential anti-diabetic agents. © 2022 Elsevier Inc.
Genetic Structure of Tibeto-Burman Populations of Bangladesh: Evaluating the Gene Flow along the Sides of Bay-of-Bengal
(2013) Nurun Nahar Gazi; Rakesh Tamang; Vipin Kumar Singh; Ahmed Ferdous; Ajai Kumar Pathak; Mugdha Singh; Sharath Anugula; Pandichelvam Veeraiah; Subburaj Kadarkaraisamy; Brijesh Kumar Yadav; Alla G. Reddy; Deepa Selvi Rani; Syed Saleheen Qadri; Lalji Singh; Gyaneshwer Chaubey; Kumarasamy Thangaraj
Human settlement and migrations along sides of Bay-of-Bengal have played a vital role in shaping the genetic landscape of Bangladesh, Eastern India and Southeast Asia. Bangladesh and Northeast India form the vital land bridge between the South and Southeast Asia. To reconstruct the population history of this region and to see whether this diverse region geographically acted as a corridor or barrier for human interaction between South Asia and Southeast Asia, we, for the first time analyzed high resolution uniparental (mtDNA and Y chromosome) and biparental autosomal genetic markers among aboriginal Bangladesh tribes currently speaking Tibeto-Burman language. All the three studied populations; Chakma, Marma and Tripura from Bangladesh showed strikingly high homogeneity among themselves and strong affinities to Northeast Indian Tibeto-Burman groups. However, they show substantially higher molecular diversity than Northeast Indian populations. Unlike Austroasiatic (Munda) speakers of India, we observed equal role of both males and females in shaping the Tibeto-Burman expansion in Southern Asia. Moreover, it is noteworthy that in admixture proportion, TB populations of Bangladesh carry substantially higher mainland Indian ancestry component than Northeast Indian Tibeto-Burmans. Largely similar expansion ages of two major paternal haplogroups (O2a and O3a3c), suggested that they arose before the differentiation of any language group and approximately at the same time. Contrary to the scenario proposed for colonization of Northeast India as male founder effect that occurred within the past 4,000 years, we suggest a significantly deep colonization of this region. Overall, our extensive analysis revealed that the population history of South Asian Tibeto-Burman speakers is more complex than it was suggested before. © 2013 Gazi et al.
Groundwater quality issues and challenges for drinking and irrigation uses in central ganga basin dominated with rice-wheat cropping system
(MDPI, 2021) Sumant Kumar; Manish Kumar; Veerendra Kumar Chandola; Vinod Kumar; Ravi K. Saini; Neeraj Pant; Nikul Kumari; Ankur Srivastava; Surjeet Singh; Rajesh Singh; Gopal Krishan; Shashi Poonam Induwar; Sudhir Kumar; Brijesh Kumar Yadav; Nityanand Singh Maurya; Anju Chaudhary
Increased population and increasing demands for food in the Indo-Gangetic plain are likely to exert pressure on fresh water due to rise in demand for drinking and irrigation water. The study focuses on Bhojpur district, Bihar located in the central Ganga basin, to assess the groundwater quality for drinking and irrigation purpose and discuss the issues and challenges. Groundwater is mostly utilized in the study area for drinking and irrigation purposes (major crops sown in the area are rice and wheat). There were around 45 groundwater samples collected across the study region in the pre-monsoon season (year 2019). The chemical analytical results show that Ca2+, Mg2+ and HCO3− ions are present in abundance in groundwater and governing the groundwater chemistry. Further analysis shows that 66%, 69% and 84% of the samples exceeded the acceptable limit of arsenic (As), Fe and Mn respectively and other trace metals (Cu, Zn, Pb, Cd) are within the permissible limit of drinking water as prescribed by Bureau of Indian Standard for drinking water. Generally, high as concentration has been found in the aquifer (depth ranges from 20 to 40 m below ground surface) located in proximity of river Ganga. For assessing the irrigation water quality, sodium adsorption ratio (SAR) values, residual sodium carbonate (RSC), Na%, permeability index (PI) and calcium alteration index (CAI) were calculated and found that almost all the samples are found to be in good to excellent category for irrigation purposes. The groundwater facie has been classified into Ca-Mg-HCO3 type. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Ligand-based designing of DPP-4 inhibitors via hybridization; synthesis, docking, and biological evaluation of pyridazine-acetohydrazides
(Institute for Ionics, 2023) Manisha Nidhar; Vipin Kumar; Archisman Mahapatra; Priya Gupta; Brijesh Kumar Yadav; Rahul Kumar Singh; Ashish Kumar Tewari
Abstract: A series of novel pyridazine-acetohydrazide hybrids were designed, synthesized, and evaluated for their in vitro and in vivo antihyperglycemic activity. In this context, pyridazine-acetohydrazides (6a–6p) were synthesized by coupling substituted aldehyde with 2-(5-cyano-6-oxo-3,4-diphenylpyridazine-1-6H-yl) acetohydrazide, which was prepared via the reaction of pyridazine ester with hydrazine hydrate. The molecular docking study was carried out to examine the binding affinities and interaction of designed compounds against the DPP-4 enzyme. Compounds 6e, 6f, 6l, and 6n exhibited interaction with active residue. In silico ADMET properties, and toxicity studies corroborated that compounds were found to have good bioavailability and less toxic. The synthesized compounds were further estimated for in vitro DPP-4 activity. Compounds 6e and 6l were found as the most effective DPP-4 inhibitor in this series with IC50 values (6.48, 8.22 nM) when compared with sitagliptin (13.02 nM). According to the toxicity assay compound, 6l showed very less toxicity at a higher concentration so further selected for the in vivo antihyperglycemic activity. Graphical abstract: [Figure not available: see fulltext.]. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
The Phylogeography of Y-Chromosome Haplogroup H1a1a-M82 Reveals the Likely Indian Origin of the European Romani Populations
(2012) Niraj Rai; Gyaneshwer Chaubey; Rakesh Tamang; Ajai Kumar Pathak; Vipin Kumar Singh; Monika Karmin; Manvendra Singh; Deepa Selvi Rani; Sharath Anugula; Brijesh Kumar Yadav; Ashish Singh; Ramkumar Srinivasagan; Anita Yadav; Manju Kashyap; Sapna Narvariya; Alla G. Reddy; George van Driem; Peter A. Underhill; Richard Villems; Toomas Kivisild; Lalji Singh; Kumarasamy Thangaraj
Linguistic and genetic studies on Roma populations inhabited in Europe have unequivocally traced these populations to the Indian subcontinent. However, the exact parental population group and time of the out-of-India dispersal have remained disputed. In the absence of archaeological records and with only scanty historical documentation of the Roma, comparative linguistic studies were the first to identify their Indian origin. Recently, molecular studies on the basis of disease-causing mutations and haploid DNA markers (i.e. mtDNA and Y-chromosome) supported the linguistic view. The presence of Indian-specific Y-chromosome haplogroup H1a1a-M82 and mtDNA haplogroups M5a1, M18 and M35b among Roma has corroborated that their South Asian origins and later admixture with Near Eastern and European populations. However, previous studies have left unanswered questions about the exact parental population groups in South Asia. Here we present a detailed phylogeographical study of Y-chromosomal haplogroup H1a1a-M82 in a data set of more than 10,000 global samples to discern a more precise ancestral source of European Romani populations. The phylogeographical patterns and diversity estimates indicate an early origin of this haplogroup in the Indian subcontinent and its further expansion to other regions. Tellingly, the short tandem repeat (STR) based network of H1a1a-M82 lineages displayed the closest connection of Romani haplotypes with the traditional scheduled caste and scheduled tribe population groups of northwestern India. © 2012 Rai et al.