Publications by authors named "Prakash Krishna"

This study investigates the use of spoof surface plasmon polaritons (SSPPs) as an effective feeding mechanism for antennas functioning within the extremely high-frequency (EHF) range. A novel method is proposed for feeding a dielectric rod antenna with SSPPs, featuring a simple design made from FR-4 material with a relative permittivity of 4.3.

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This research explores the design of an infrared (IR) photodetector using mercury cadmium telluride (HgCdTe). It proposes two- and three-dimensional homojunction models based on p-HgCdTe/n-HgCdTe, focusing on applications in the long-wavelength infrared range. The photodetector's performance is analyzed using Silvaco ATLAS TCAD software and compared with analytical calculations based on drift-diffusion, tunneling, and Chu's approximation techniques.

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Purpose/objectives: This study proposes the utilization of a Natural Language Processing tool to create a semantic search engine for dental education while addressing the increasing concerns of accuracy, bias, and hallucination in outputs generated by AI tools. The paper focuses on developing and evaluating DentQA, a specialized question-answering tool that makes it easy for students to seek information to access information located in handouts or study material distributed by an institution.

Methods: DentQA is structured upon the GPT3.

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Background: Interferon regulatory factor 6 (IRF6) has a key function in palate fusion during palatogenesis during embryonic development, and mutations in IRF6 cause orofacial clefting disorders.

Methods And Results: The in silico analysis of IRF6 is done to obtain leads for the domain boundaries and subsequently the sub-cloning of the N-terminal domain of IRF6 into the pGEX-2TK expression vector and successfully optimized the overexpression and purification of recombinant glutathione S-transferase-fused NTD-IRF6 protein under native conditions. After cleavage of the GST tag, NTD-IRF6 was subjected to protein folding studies employing Circular Dichroism and Intrinsic fluorescence spectroscopy at variable pH, temperature, and denaturant.

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The cheaper surgical dressings often leave residual adhesive, which can be unsightly and uncomfortable. We describe a simple and cost-effective procedure for removing adhesive residue using micropore tape. This technique can be easily performed by anyone, including the patients themselves.

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A hepta-band terahertz metamaterial absorber (MMA) with modified dual T-shaped resonators deposited on polyimide is presented for sensing applications. The proposed polarization sensitive MMA is ultra-thin (0.061 λ) and compact (0.

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Interferon regulatory factor-1 (IRF-1) is a vertebrate transcription factor that plays significant roles in cell cycle regulation, anti-viral response, tumor suppression and immune response. High-level expression of recombinant IRF-1 at 37 °C leads to the formation of insoluble aggregates (insoluble fraction) in Escherichia coli (E. coli), which usually devoid of biological activity.

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This paper presents three self-powered photodetectors namely, p-bilayer graphene (BLG)/n-ZnO nanowires (NWs), p-BLG/n-Si NWs/p-Si and p-BLG/n-ZnO NWs/p-Si. The Silvaco Atlas TCAD software is utilized to characterize the optoelectronic properties of all the devices and is validated by analytical modeling. The proposed dual-junction photodetectors cover broadband spectral response varying from ultraviolet to near-infrared wavelengths.

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Context: Virtual Microscopy.

Aim: The aim of this study was to demonstrate, as a proof of concept, the integration of a Foldscope, along with a smartphone and screen mirroring devices, into the regular academic teaching program for use with all types of regular slides for economical virtual microscopy.

Setting Design & Methods: For the purpose of this demonstration, a microscopic slide of a ground section of a tooth, a smartphone (iPhone6), a Foldscope and an Apple TV module were chosen to demonstrate the integration of a low-cost unbreakable microscope along with a smartphone to facilitate immediate viewing, capture, sharing and even projection of the image by screen mirroring, if required, in a classroom setting.

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Background: There is a paucity of literature about the atypical clinical manifestations in children with atopic dermatitis (AD) in Asian setting, and colonization with methicillin-resistant (MRSA), and its association with disease severity, if any.

Objective: To elucidate atypical clinical patterns of AD in children and to determine the MRSA isolation and its association with disease severity.

Methods: We studied 55 pediatric patients from 2 months to 10 years of age, of either sex, diagnosed with AD based on the diagnostic criteria of Hanifin and Rajka.

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Interferon regulatory factor-1 (IRF-1) is a tumor suppressor gene, which encodes a mammalian transcription factor that serves various vital functions in a cell, such as cell cycle regulation, immunomodulation, and antiviral response. We report full-length human IRF-1 cDNA cloning and expression in E. coli/BL21 cells with complete solubilisation of recombinant protein.

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In middle Gangetic plain, high arsenic concentration is present in water, which causes a significant health risk. Total 48 morphologically distinct arsenite resistant bacteria were isolated from middle Gangetic plain. The minimum inhibitory concentration (MIC) values of arsenite varied widely in the range 1-15 mM of the isolates.

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Interferon regulatory factor-2 (IRF-2) is a multifunctional transcription factor having gene activation, repression and synergistic effect in conjunction with IRF-1. IRF-2 is also involved in type I IFN signalling by repressing INFβ gene. So far, the molecular mechanism of its DNA binding activity remains elusive.

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Objectives: Acinetobacter spp. has emerged as a threat to the healthcare workers throughout the globe, owing to its property of multidrug resistance. The aim of the present study was to evaluate the antimicrobial resistance patterns of Acinetobacter spp.

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Dental abscess is a frequently occurring infectious process known to the health practice. The fate of the infection depends on the virulence of the bacteria, host resistance factors, and regional anatomy. Serious consequences arising from the spread of a dental abscess lead to significant morbidity and mortality.

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Problem: To overcome availability of the purified native zona pellucida (ZP) glycoproteins for immunocontraception, porcine ZP3, and ZP4 were expressed in E. coli.

Method Of Study: Purified recombinant proteins were characterized by SDS-PAGE and Western blot, and immunogenicity and contraceptive efficacy determined in FvB/J female mice.

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An investigation was carried out to develop an efficient micropropagation protocol for Catharanthus roseus. Experiments were conducted to optimize suitable media for in vitro shoot multiplication and root induction. Out of the different media compared for in vitro shoot multiplication, Murashige and Skoog (MS) medium supplemented with 1 mg/l of 6-benzylaminopurine and 0.

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Streptococcus agalactiae is an important cause of invasive infections in neonates and is emerging as an important pathogen in elderly females. S. agalactiae is a commensal organism of the female genital tract; however, isolation from the uterine cavity suggests ascending infection of this organism caused by occlusion of the uterine cavity.

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Interferon regulatory factor-2 (IRF-2) is a mammalian transcription factor for Interferon and Interferon inducible genes; biologically, plays an important role in cell growth regulation and has been shown to be a potential oncogene. We have expressed, purified recombinant Murine IRF-2 (349 amino acid) as a GST (Glutathione-S-Transferase)-IRF-2 soluble fusion protein in E. coli XL-1 blue cells.

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Interferon regulatory factor-2 (IRF-2) is an important transcription factor involved in cell growth regulation, immune response and cancer. IRF-2 can function as a transcriptional repressor and activator depending on its DNA-binding activity and protein-protein interactions. We compared the amino acid sequences of IRF-2 and found a C-terminal tetrapeptide (314PAPV317) of mouse IRF-2 to be different (314SSSM317) from human IRF-2.

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Helicases catalyze the opening of nucleic acid duplexes and are implicated in many nucleic acid metabolic cellular processes that require single stranded DNA or reorganization of RNA structure. Previously we have reported that Plasmodium falciparum genome contains a number of DEAD box helicases. In the present study we report the cloning, expression and characterization of one of the novel members of DEAD box family from P.

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The present study assessed change in knowledge, attitudes, and self-reported hand-washing practices of 136 food handlers 3 months after providing them health education using posters and interactive sessions using a flip chart. There was a significant change in the proportion of study participants who named food borne or waterborne diseases, including gastroenteritis (79.4% to 91.

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