Publications by authors named "Ravi S Kumar"

Background/objectives: The present study investigates the reasons for better recognition of disyllabic words in Malayalam among individuals with hearing loss. This research was conducted in three experiments. Experiment 1 measured the psychometric properties (slope, intercept, and maximum scores) of disyllabic wordlists.

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Cochlear implants (CIs) are a well-established treatment for severe to profound hearing loss, particularly in young children. The success of CIs is influenced by various factors, including the age of implantation and the quality and duration of post-operative rehabilitation, such as Auditory Verbal Therapy (AVT). AVT plays a crucial role in developing listening and spoken language skills in children with CIs.

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Tomato (Solanum lycopersicum L.) is rich in nutrients and has been an important target for enhancing the accumulation of various metabolites. Tomato also contains cholesterol-derived molecules, steroidal glycoalkaloids (SGAs), which contribute to pathogen defense but are toxic to humans and considered antinutritional compounds.

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Background: Audiological diagnosis and rehabilitation often involve the assessment of whether the maximum speech identification score (PB) is poorer than expected from the pure-tone average (PTA) threshold. This requires the estimation of the lower boundary of the PB values expected for a given PTA (one-tailed 95% confidence limit, CL). This study compares the accuracy and consistency of three methods for estimating the 95% CL.

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Recent studies propose that primary transcripts of miRNAs (pri-miRNAs) contain small Open Reading Frames (ORFs) capable of encoding miRNA-encoded peptides (miPEPs). These miPEPs can function as transcriptional regulators for their corresponding pri-miRNAs, ultimately enhancing mature miRNA accumulation. Notably, pri-miR408 encodes the functional peptide miPEP408, regulating expression of miR408 and its target genes, providing plant tolerance to stresses.

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Throughout evolution, plants have developed strategies to confront and alleviate the detrimental impacts of abiotic stresses on their growth and development. The combat strategies involve intricate molecular networks and a spectrum of early and late stress-responsive pathways. Plant peptides, consisting of fewer than 100 amino acid residues, are at the forefront of these responses, serving as pivotal signalling molecules.

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The current study describes a new diagnostic method for the rapid and accurate detection of , the pathogen accountable for causing Karnal bunt (KB) disease in wheat. This method uses quantitative real-time polymerase chain reaction (qPCR) and a primer set derived from glyceraldehyde 3-phosphate dehydrogenase (GAPDH) gene of to identify the presence of the pathogen. The qPCR assay using this primer set was found highly sensitive, with a limit of detection (LOD) value of 4 pg of DNA.

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Karnal bunt (KB; ) is the prime quarantine concern for quality wheat production throughout the world. The most effective approach to dealing with this biotic stress is to breed KB-resistant wheat varieties, which warrants a better understanding of genome architecture. In India, the North Western Plain Zone is the prime hot spot for KB disease, but only limited efforts have been made to decipher diversity at the genomic level.

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Psychoacoustic and speech perception measures were compared for a group who were exposed to noise regularly through listening to music via personal music players (PMP) and a control group without such exposure. Lifetime noise exposure, quantified using the NESI questionnaire, averaged ten times higher for the exposed group than for the control group. Audiometric thresholds were similar for the two groups over the conventional frequency range up to 8 kHz, but for higher frequencies, the exposed group had higher thresholds than the control group.

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MicroRNAs (miRNAs) are small non-coding RNAs that play a central role in regulating various developmental and biological processes. The expression of miRNAs is differentially modulated in response to various biotic and abiotic stresses. Recent findings have shown that some pri-miRNAs encode small regulatory peptides known as microRNA-encoded peptides (miPEPs).

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Bipolaris sorokiniana (BS) is an economically important fungal pathogen causing spot blotch of wheat (Trtiticum aestivum) and found in all wheat-growing zones of India. Very scanty and fragmentary information is available on its genetic diversity. The current research is the first detailed report on the geographic distribution and evolution of BS population in five geographically distinct wheat-growing zones (North Western Plain Zone (NWPZ), North Eastern Plain zone (NEPZ), North Hill Zone (NHZ), Southern Hill Zone (SHZ) and Peninsular Zone (PZ)) of India, studied by performing nucleotide sequence comparison of internal transcribed spacer region of 528 isolates.

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OscWRKY1 from Ocimum sanctum positively regulates phenylpropanoid pathway genes and rosmarinic acid content. OscWRKY1 overexpression promotes resistance against bacterial pathogen in Arabidopsis. WRKY transcription factor (TF) family regulates various developmental and physiological functions in plants.

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Aims: To examine (1) the association of mothers' 6-n-propylthiouracil (PROP) sensitivity with snacking habits and caries experience of both the mother and their 2-5-year-old preschool children and (2) the association of feeding habits with caries prevalence in 2-5-year-old children.

Materials And Methods: In this analytical cross-sectional study, 2-5-year-old preschool children were clinically examined by a single calibrated examiner and divided into two groups of 80 children with early childhood caries (ECC) and 80 without. Mothers of the children were clinically examined and a second blinded investigator determined their genetic taste type using PROP.

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Unlabelled: Improvement of grain protein content (GPC), loaf volume, and resistance to rusts was achieved in 11 Indian wheat cultivars that are widely grown in four different agro-climatic zones of India. This involved use of marker-assisted backcross breeding (MABB) for introgression and pyramiding of the following genes: (i) the high GPC gene ; (ii) HMW glutenin subunits 5 + 10 at loci, and (iii) rust resistance genes, , , , and . GPC increased by 0.

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Aim: To compare the caries risk profile in children with mild, moderate, and severe intellectual disability (ID) using cariogram.

Materials And Methods: A cross-sectional study was conducted to compare caries risk profile using cariogram among 150 children aged 6-18 years, with various levels of ID (50 each in Mild ID, Moderate ID, and Severe ID groups), attending special schools in Bengaluru city. The risk assessment consisted of: a questionnaire, an interview, estimation of oral hygiene, saliva sampling, microbial evaluation and clinical examination.

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Nicobari pig is reared by , a native tribal population of Andaman and Nicobar Islands. Nicobari pig has maintained its genetic identity due to geographical isolation. This communication is the first report on maternal inheritance of Nicobari pigs.

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Previous studies have shown insufficient dispersion and thermal stability of nanofluids for high-temperature carbon capture and storage applications. Compared to the other NPs, TiO nanofluids exhibit superior stability due to their high zeta potential. In previous studies, TiO nanofluids have shown superior performance in heat transfer and cooling applications along with importing the stability of other nanofluids like SiO in form of nanocomposites.

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Stephanofilariasis or humpsore is a chronic parasitic dermatitis of cattle. Various treatment regimens were attempted in the past but were found to be partially effective. Here, we claim a successful treatment regime using an FDA-approved macrocyclic lactone, a piperazine derivative, and an herbal preparation.

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Background: Aphasia is a common consequence of stroke. To optimize recovery, it becomes critical as there are early identification and treatment of language deficits. The rising burden of stroke aphasia and lack of screening tools in the Indian context necessitates the need for a screening tool.

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The burrowing mite causes scabies in humans or mange in animals. It infests a wide range of mammalian species including livestock, companion animals, wild animals, and humans. Differential diagnosis of varieties is key for epidemiological studies and for formulation of an eradication program.

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The present study was conducted with the hypothesis that addition of cholesterol to the extender would stabilize the sperm membranes by increasing the cholesterol-to-phospholipid (C:P) ratio and would result in an improved post-thaw semen quality and reduce oxidative stress in the jack (Martina franca) semen. Forty-eight ejaculates from six jacks were collected and analyzed for the present study. The freshly collected semen sample of each jack stallion was divided into five equal fractions after addition of the primary extender without cholesterol-loaded cyclodextrin (CLC) (C) and with 1, 1.

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Flag smut incited by has the potential to cause substantial reduction in yield and quality of wheat production. An early and precise diagnosis is a key component in the successful management of flag smut of wheat. Therefore, a simple molecular assay for the rapid detection of was developed for the first time.

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The terpenoid pathway serves as an essential source of all isoprenoid precursors and metabolites that are of great pharmacological importance. The major enzymes for the synthesis of these diverse molecules is the terpene synthases (TPSs), which catalyse the final step of the synthesis of the important secondary products, the terpenes. Previous studies have reported that the various environmental factors, including light govern the synthesis of terpenoids.

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Background: Accurate root canal length determination, simplicity of the procedure, and patient's cooperation are important determinants in the success of endodontic treatment in primary teeth.

Aim: The aim of the study was to clinically compare the accuracy of Propex Pixi and Formatron D10 apex locators with conventional radiography in determining working length in mandibular primary second molars with and without varying degrees of physiological root resorption.

Design: A nonrandomized clinical trial was conducted in 115 mandibular primary second molars indicated for pulpectomy in 90 pediatric dental patients.

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Barley covered smut (CS) pathogen genome was mined for microsatellite distribution and their application in defining population structure and genetic variation. To dissect the molecular variation and genetic structure of , 59 fungal isolates representing two distinct agro-ecological zones of India were analyzed by employing simple sequence repeats (SSRs). Using bioinformatic approaches, a total of 100,239 and 137,442 microsatellites were identified from 20.

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