514 results on '"Mamta Sharma"'
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2. Breaking the Reflex: Impact in Hospital-Acquired Infection Incidence for Clostridioides difficile Infection
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Mamta Sharma, Reese Cosimi, Alysia Stewart, Nomides Nicole, Lisa Sturm, William Hart, and Leonard Johnson
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Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Nucleic acid amplification tests (NAAT) do not distinguish between colonization and Clostridioides difficile (C.diff) associated diarrhea. On April 5th 2023 our laboratory introduced a new C. diff testing methodology. Previously, if a C. diff screen result was negative for toxin and positive for glutamate dehydrogenase (GDH), a second confirmatory test was conducted with NAAT. This confirmatory test was removed from our testing algorithm. NAAT testing may be ordered ad hoc when clinically relevant diarrhea persists, and alternative etiologies have been excluded. We wanted to evaluate the impact of change with testing methods. Method: Retrospective review of all inpatient hospital-acquired C.diff infections reported to NHSN database from Ascension Michigan Market which comprises 14 acute care hospitals from June 2019 to August 2023. Data for C diff was analyzed every quarter. The risk adjustments used to calculate the Standardized Infection Ratios (SIRs) for C. diff infections was set at 0.48 based on CDC mean SIR established for acute care hospitals in 2022. Results: A total of 14 acute care hospitals were included from which 866 C.diff cases were reported during this period. Overall, the SIR dropped from 0.59 from June-August 2019 to 0.32 reported from March-May 2023; 45.7 % decrease. The maximum reduction in SIR was seen post intervention at 0.21 from June-August 2023 which was 78.3% below the benchmark of 0.48. (Figure) Conclusions: Strategies to optimize current laboratory tests are critical to differentiate C. diff infection from colonization. The current strategy by changing the testing method led to substantial reduction in C-diff. Diagnostic stewardship studies should ideally include outcome measures targeted to post-intervention patients to determine clinical relevance and patient safety. Optimizing test utilization remains a critical component of quality healthcare delivery. Future NHSN updated surveillance definition will require incorporating clinical decision-making into the metric; that is including a combination of any positive C-diff test plus initiation of antibiotic therapy for C-diff.
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- 2024
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3. Assessment of the spatial distribution and identification of potential risk areas for the sterility mosaic disease of pigeonpea (Cajanus cajan L. Huth) in Southern India
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Kasi Rao Mediga, Gururaj Sunkad, Sandip Shil, Sunil Kulkarni, Balanagouda Patil, U. S. Sharath Chandran, P. Ashwini, and Mamta Sharma
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geostatistical approaches ,pigeonpea ,point pattern analysis ,SMD ,semivariogram ,surface interpolation ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
Sterility mosaic disease (SMD) is an emerging biotic risk to the cultivation of pigeonpea throughout the Indian subcontinent. The prevalence and distribution of SMD documented from diverse agro-climatic zones are still poorly known. In this investigation, we determined the spatial distribution of SMD covering major pigeonpea-growing states of Southern India namely, Karnataka, Telangana, Tamil Nadu, Maharashtra, and Andhra Pradesh by considering 2 years of exploratory survey data. Geospatial approaches were employed to determine the SMD incidence levels at unvisited locations using neighboring observations. The results indicated enormous variability in disease incidence ranging from 0 to 82.64% and 0 to 36.84%, respectively, in Kharif 2021–22 and 2022–23 in pigeonpea-growing states. Spatial autocorrelation analysis and Ripley’s K function established the presence of average clustering over sampling locations. Two main clusters were identified via agglomerative hierarchical cluster analysis. From the Local Moran’s I spatial autocorrelation (LISA) analysis, most of the districts were clustered together at (I25%) above the threshold level and must be closely monitored to restrict and minimize further disease spread across the studied areas in Southern India. In pigeonpea, this is the first study in India that attempted to understand the spatial pattern of SMD using geostatistical methodologies. The results of the study will aid in the design and dissemination of specific management practices and curb the further spread of SMD.
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- 2024
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4. Optimizing speed breeding and seed/pod chip based genotyping techniques in pigeonpea: A way forward for high throughput line development
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Prakash I. Gangashetty, Shruthi H. Belliappa, Naresh Bomma, Vinutha Kanuganahalli, Sobhan Babu Sajja, Sunita Choudhary, Ramanagouda Gaviyappanavar, Deekshitha Bomireddy, V. Anil Kumar, Jwala Pranati, Mamta Sharma, and Manish K. Pandey
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Speed breeding ,Photoperiod ,Seed or pod chip genotyping ,Single seed descent ,Plant culture ,SB1-1110 ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background The challenge of pigeonpea breeding lies in its photosensitivity and seasonal specificity. This poses a problem to the breeder, as it restricts to single generation advancement in a year. Currently, the cross to cultivar gap is twelve to thirteen years resulting in a limited number of varietal releases over the past six decades. Shortening the breeding cycle was need of the hour, unlikely achieved by conventional breeding. To overcome these hindrances speed breeding was a necessary leap. An experiment was planned to optimize the speed breeding coupled with single seed descent and seed or pod chip-based genotyping to shorten the breeding cycle in pigeonpea at ICRISAT, Hyderabad. Monitored photoperiod, light wavelength, temperature and crop management regime were the indicators attributing to the success of speed breeding. Result A photoperiod of 13 h: 8 h: 13 h at vegetative: flowering and pod filling stages is ideal for shortening the breeding cycle. Broad spectrum light (5700 K LED) hastened early vegetative growth and pod formation. Whereas far-red (735 nm) light favoured early flowering. A significant difference between the photoperiods, genotypes as well as photoperiod x genotype interaction for both days to flowering and plant height was noted. Conclusion The optimized protocol serves as a road map for rapid generation advancement in pigeonpea. Deploying this protocol, it is possible to advance 2–4 generations per year. The breeding cycle can be reduced to 2–4 years which otherwise takes 7 years under conventional breeding. Single Seed Descent and seed or pod chip-based genotyping for early generation marker assisted selection, strengthened the precision of this technique aiding in high throughput line development.
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- 2024
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5. Predictors of prolonged length of stay in adult patients with respiratory syncytial virus infections – a multi-center historical cohort study
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Ambreen Malik, Susan Szpunar, Mamta Sharma, Leonard B. Johnson, Louis Saravolatz, and Ashish Bhargava
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respiratory syncytial virus (RSV) ,predictors ,risk factors ,hospital length of stay ,prolonged hospital length of stay ,Microbiology ,QR1-502 - Abstract
ObjectivesSeveral studies have reported risk factors for severe disease and mortality in hospitalized adults with RSV infections. There is limited information available regarding the factors that affect the duration of a patient’s hospital length of stay (LOS).MethodsThis was a multicenter historical cohort study of adult patients hospitalized for laboratory-confirmed RSV in Southeast Michigan between January 2017 and December 2021. Hospitalized patients were identified using the International Classification of Diseases, Tenth Revision 10 codes for RSV infection. Mean LOS was computed; prolonged LOS was defined as greater than the mean.ResultsWe included 360 patients with a mean age (SD) of 69.9 ± 14.7 years, 63.6% (229) were female and 63.3% (228) of white race. The mean hospital LOS was 7.1 ± 5.4 days. Factors associated with prolonged LOS in univariable analysis were old age, body mass index (BMI), smoking status, Charlson Weighted Index of Comorbidity (CWIC), home oxygen, abnormal chest x-ray (CXR), presence of sepsis, use of oxygen, and antibiotics at the time of presentation. Predictors for prolonged LOS on admission in multivariable analysis were age on admission (p
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- 2024
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6. Video Laryngoscopes: A Boon for Parapharyngeal Tumors of Childhood
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Man Bhavan Mahajan, Mamta sharma, and Rupali Mahajan
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Parapharyngeal tumors ,Video laryngoscope ,Difficult airway ,Anesthetic management ,Pediatric airway management ,Airway devices ,Anesthesiology ,RD78.3-87.3 ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Parapharyngeal tumors often distort the airway anatomy leading to obstruction and hinderance for intubation thus posing a challenge for the anesthetist at securing airway with least damage to the nearby structures. We present our experience through a series of 5 such cases in children managed successfully using video laryngoscope. Working in places where availability of advanced airway equipment such as pediatric size fiberoptic is unavailable, a video laryngoscope can help to appropriately assess the airway and prevent disastrous outcomes.
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- 2023
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7. Diagnosis of Fusarium oxysporum f. sp. ciceris causing Fusarium wilt of chickpea using loop-mediated isothermal amplification (LAMP) and conventional end-point PCR
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Saidi R. Achari, Ross C. Mann, Mamta Sharma, and Jacqueline Edwards
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Medicine ,Science - Abstract
Abstract Fusarium oxysporum (Fo) is ubiquitous in soil and forms a species complex of pathogenic and putatively non-pathogenic strains. Pathogenic strains cause disease in over 150 plant species. Fusarium oxysporum f. sp. ciceris (Foc) is a major fungal pathogen causing Fusarium wilt in chickpeas (Cicer arietinum). In some countries such as Australia, Foc is a high-priority pest of biosecurity concern. Specific, sensitive, robust and rapid diagnostic assays are essential for effective disease management on the farm and serve as an effective biosecurity control measure. We developed and validated a novel and highly specific PCR and a LAMP assay for detecting the Indian Foc race 1 based on a putative effector gene uniquely present in its genome. These assays were assessed against 39 Fo formae speciales and found to be specific, only amplifying the target species, in a portable real-time fluorometer (Genie III) and qPCR machine in under 13 min with an anneal derivative temperature ranging from 87.7 to 88.3 °C. The LAMP assay is sensitive to low levels of target DNA (> 0.009 ng/µl). The expected PCR product size is 143 bp. The LAMP assay developed in this study was simple, fast, sensitive and specific and could be explored for other Foc races due to the uniqueness of this marker to the Foc genome.
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- 2023
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8. In Vitro Doubled Haploid Production of Bacterial Blight Resistant Plants from BC2F1 Plants (Ranbir Basmati X Pau148) Through Anther Culture
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Mridhu Sharma, Mamta Sharma, A.K. Singh, R. K. Salgotra, Manmohan Sharma, Bupesh K. Sharma, and S.K. Gupta
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doubled haploids ,callus induction ,shoot regeneration ,anther culture and bb resistant. ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Doubled haploid plants are very important for the development of complete homozygous plants from heterozygous parents in one generation as they possess duplicate copy of haploid chromosome. Haploid production is easily obtained from in vitro anther culture. The present study was undertaken with the objective to develop doubled haploids using anthers for in vitro induction of callus on N6 medium supplemented with various combinations and concentrations of 2,4-dichlorophenoxy acetic acid (2,4-D) (0.5-2.5 mg/L), Kinetin (0.5-1.0 mg/L) and Naphthalene acetic acid (NAA) (2.0 mg/L) as callus induction medium (CIM). The highest callus induction frequency was obtained when N6 medium fortified with 2,4-D (2.5 mg/L), Kinetin (0.5 mg/L) and NAA (2 mg/L) of 10.07 per cent. The induced callus was sub cultured for shoot regeneration on Murashige and Skoog medium (MS) supplemented with growth regulators: Kinetin and NAA (0.5 mg/L each) in combination with BAP (0.0 - 2.5 mg/L). MS medium supplemented with NAA (0.5 mg/L), Kinetin (0.5 mg/L) and BAP (1.5 mg/L) was most responsive exhibiting regeneration frequency of 28.1 per cent which resulted in maximum regeneration of green plantlets and only 5.21 per cent of albinos. Individual plantlets were separated and immersed in liquid MS medium augmented with NAA (0.5-1.0 mg/L) and BAP (0.5-1.0 mg/L). Maximum rooting was observed in MS medium with NAA (0.5 mg/L) and BAP (1.0 mg/L). The survival rate of in-vitro raised plants was 51.51 per cent. Of these surviving plants, 21 plants were observed to have the sterility percentage above 50 percent and hence can be considered as the doubled haploid plants. Plant DH8 is susceptible and DH20 is heterozygous for gene Xa21. Two plants are susceptible for gene xa13
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- 2022
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9. Transcriptome profiling reveals the expression and regulation of genes associated with Fusarium wilt resistance in chickpea (Cicer arietinum L.)
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Vanika Garg, Annapurna Chitikineni, Mamta Sharma, Raju Ghosh, Srinivasan Samineni, Rajeev K. Varshney, and Himabindu Kudapa
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Plant culture ,SB1-1110 ,Genetics ,QH426-470 - Abstract
Abstract Fusarium wilt (FW) is one of the most significant biotic stresses limiting chickpea production worldwide. To dissect the molecular mechanism of FW resistance in chickpea, comparative transcriptome analyses of contrasting resistance sources of chickpea genotypes under control and Fusarium oxysporum f. sp. ciceris (Foc) inoculated conditions were performed. The high‐throughput transcriptome sequencing generated about 1137 million sequencing reads from 24 samples representing two resistant genotypes, two susceptible genotypes, and two near‐isogenic lines under control and stress conditions at two‐time points (7th‐ and 12th‐day post‐inoculation). The analysis identified 5182 differentially expressed genes (DEGs) between different combinations of chickpea genotypes. Functional annotation of these genes indicated their involvement in various biological processes such as defense response, cell wall biogenesis, secondary metabolism, and disease resistance. A significant number (382) of transcription factor encoding genes exhibited differential expression patterns under stress. Further, a considerable number of the identified DEGs (287) co‐localized with previously reported quantitative trait locus for FW resistance. Several resistance/susceptibility‐related genes, such as SERINE/THREONINE PROTEIN KINASE, DIRIGENT, and MLO exhibiting contrasting expression patterns in resistant and susceptible genotypes upon Foc inoculation, were identified. The results presented in the study provide valuable insights into the transcriptional dynamics associated with FW stress response in chickpea and provide candidate genes for the development of disease‐resistant chickpea cultivars.
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- 2023
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10. Exploring phytochemical composition, photocatalytic, antibacterial, and antifungal efficacies of Au NPs supported by Cymbopogon flexuosus essential oil
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Diksha Pathania, Mamta Sharma, Pankaj Thakur, Vishal Chaudhary, Ajeet Kaushik, Hidemitsu Furukawa, and Ajit Khosla
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Medicine ,Science - Abstract
Abstract Biofabrication of gold nanoparticles (AuNPs) using the aromatic essential oils is highlighted due to its simple, economical, low toxicity, and eco-friendly nature. Essential oil of Cymbopogon flexuosus (CF), an economically valuable medicinal plant, exhibits anti-inflammatory, anti-tumor, antioxidant, and antimicrobial activities. For the first time, this research accounts for the biosynthesis, physicochemical, photocatalytic, antifungal, antibacterial properties of biogenic AuNPs, fabricated using CF essential oil collected from different altitudes (S1-Palampur, S2-Haryana, S3-Dehradun). The altitudinal disparity in the phytochemical composition of essential oils is highlighted. The average crystallite size ranged from 10 to 32 nm and was influenced by CF samples used in the synthesis. The spectroscopic outcomes revealed the involvement of bioactive reagents from CF essential oil in the fabrication and stabilization of AuNPs. The fabricated AuNPs exhibited excellent antimicrobial activities against all tested strains (Staphyloccucs aureus, Escherichia coli, Fusarium oxysporum), showing their efficacy as an antimicrobial agent to treat infectious diseases. Moreover, AuNPs exhibited excellent photocatalytic efficacy of around 91.8% for the degradation of methylene blue under exposure of direct sunlight for 3 h without the assistance of an external reducing agent. The outcomes highlight a potential economic and environmentally friendly strategy to fabricate biogenic AuNPs for diversified industrial applications where antimicrobial and photocatalytic efficacies are the key requirements.
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- 2022
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11. Essential oil-mediated biocompatible magnesium nanoparticles with enhanced antibacterial, antifungal, and photocatalytic efficacies
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Diksha Pathania, Sunil Kumar, Pankaj Thakur, Vishal Chaudhary, Ajeet Kaushik, Rajender S. Varma, Hidemitsu Furukawa, Mamta Sharma, and Ajit Khosla
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Medicine ,Science - Abstract
Abstract Emergent application of antimicrobial strategies as symptomatic treatment in coronavirus disease (COVID-19) and linkage of severe acute respiratory syndrome coronavirus2 with microbial infections, has created colossal demand for antimicrobials. For the first time, this communication explore the physicochemical, antifungal, antibacterial, and photocatalytic properties of biogenic magnesium nanoparticles (MgNPs), synthesized using essential oil of Cymbopogon flexuosus's as an efficient multifunctional reducing and stabilizing/capping reagent. It is observed that MgNPs (ranging in size: 8–16 nm) of varying phytochemical compositions (MgS1, MgS2, MgS3) exhibited various useful physicochemical, antimicrobial, and photocatalytic properties. FTIR outcomes highlight the functional biomolecules-assisted reduction of Mg from Mg+ to Mg0. Among all, MgS3-Nps owing to the smallest particle size exhibited superior photocatalytic efficacy (91.2%) for the methylene blue degradation upon direct exposure to the sunlight for 3 h without using any reducing agents. Fabricated MgNPs also exhibited excellent antifungal (against Fusarium oxysporum) and antibacterial (versus Staphylococcus aureus and Escherichia coli) efficacies compared to state-of-the-art antimicrobial agents deployed for the treatment of infectious diseases. Based on this investigated greener approach, imperative from economic and environmental viewpoint, such essential oil based-MgNPs can be a potential nanosystem for various industrial applications where photocatalytic, and biomedical attributes are the key requirements.
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- 2022
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12. Correlation Between Body Mass Index and Sleep Quality among Indian Doctors: A Descriptive Study
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Harpreet Singh Gulati, Kamaljeet Kaur, Jasveen Kaur, Ambica Wadhwa, and Mamta Sharma
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clinicians ,medical ,obesity ,overweight ,surgical ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Surgery ,RD1-811 - Abstract
Introduction: In the current scenario, clinicians are constantly subjected to high workload coupled with enormous amount of stress which can lead to both derangement of sleep and accumulation of body fat. Since they are the central pillar of healthcare industry, the health of doctors themselves is an extremely important factor in pursuit of a healthy and disease free society. Aim: To determine the effect of Body Mass Index (BMI) on quality of sleep in clinicians and to establish a relation between obesity and sleep pattern of clinicians. Materials and Methods: The present descriptive study was conducted on 400 doctors working in Outpatient Department (OPD) clinics of various departments at Punjab Institute of Medical Sciences, Jalandhar and OPDs of NIMS Hospital, Jaipur, India, from July 2019 to June 2021. BMI was calculated as ratio of weight (kg) to the square of height (m). Sleep quality was assessed by Pittsburgh Sleep Quality Index (PSQI) questionnaire as a Global Pittsburgh Sleep Quality Index. BMI and sleep quality were checked for inter-relationship using various statistical methods like Chi- square test, Analysis of Variance (ANOVA), student t-test and Pearson’s correlation. Results: In the present study, 200 were males and 200 were females. Most of the participants were in the age group of 41- 50 years. A 51.4% of participants with BMI >25 kg/m2 had poor sleep quality which was significantly higher when compared with participants with BMI
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- 2023
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13. Multi-Environment Testing Based G × E Interactions Reveal Stable Host-Plant Resistance against Sterility Mosaic Disease in Pigeonpea
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Kasi Rao Mediga, Gururaj Sunkad, Sunil Kulkarni, U. S. Sharath Chandran, Raju Ghosh, Dipak Kshirsagar, Muniswamy Sonnappa, Srinivas Katravath, Ashwini Parthasarathy, and Mamta Sharma
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pigeonpea ,SMD ,multi-environment testing ,GGE biplot ,principal component analysis ,Agriculture - Abstract
Sterility mosaic disease (SMD) is a serious biotic restraint in pigeonpea-growing regions of the Indian subcontinent. Disease control using chemicals like acaricides is not economical or sustainable, pointing towards host plant resistance as the ideal strategy for its management. In this study, from preliminary screening of 75 pigeonpea germplasm accessions and breeding lines, 21 pigeonpea genotypes showing moderate resistance to SMD were selected and again assessed at two multi-environment locations during Kharif 2021/2022 and 2022/2023. Analysis of variance partitioned the variation between the main effects of genotype and genotype × environment (GGE). The results revealed a significant variation (p ˂ 0.05) in the SMD incidence between the tested genotypes, environment, and their interactions. Genotype variance contributed the greatest effect (63.56%) to the total variation and it represents the maximum disease variation. Furthermore, a significant positive correlation was found for the levels of SMD incidence between the test environments. We observed that SMD incidence had a high negative correlation with the maximum temperature (r = −0.933), and positively correlated with the rainfall (r = 0.502). Analysis of principal components 1 and 2 of the GGE explained 95.33% of the total variation and identified 10 genotypes (G1, G3, G4, G8, G10, G12, G13, G15, G20, and G21) showing moderate resistance stability across the environments. As new sources of resistance to SMD, these genotypes should be incorporated in pigeonpea breeding trials for further release. This research broadens the area of phenotyping and identifies stable resistance sources that can be used in future SMD resistance breeding projects.
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- 2023
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14. Distribution and pathogenic diversity in Fusarium udum Butler isolates: the causal agent of pigeonpea Fusarium wilt
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Ravikumara B. M, Ramanagouda G, M. K. Naik, Rameshwar Telangre, and Mamta Sharma
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Cajanus cajan ,Fusarium udum ,Variability ,Phenotyping ,Variants ,Botany ,QK1-989 - Abstract
Abstract Background Fusarium wilt (Fusarium udum Butler), an important soil-borne disease of pigeonpea [Cajanus cajan (L.)], causes significant yield losses across the major pigeonpea production regions. Widespread and high diversity in F. udum hampers the breeding for pigeonpea wilt resistance. The study aimed to elucidate the pathogenic diversity and distribution of F. udum variants in major pigeonpea growing regions of India. Results The roving survey was conducted in major pigeonpea-growing states of India to collect the F. udum isolates. Pathogenic variability of 60 F. udum isolates which are selected from diverse geographical locations and pathogenicity test were performed against 11 pigeonpea host differentials cultivars [ICP 8858, ICP 8859, ICP 8862, ICP 8863, ICP 9174, C 11, BDN 1, BDN 2, LRG 30, ICP 2376 and Bahar (ICP 7197)]. The current study indicated distribution of F. udum isolates into nine variants (0, 1, 2, 3, 4, 5, 6, 7 and 8). Variant-2 and 3 were found to be widespread and predominant in most pigeonpea producing regions. Variant-7 (Karnataka) and Variant-8 (Madhya Pradesh and Maharashtra) were found highly virulent, as most of the host differentials were susceptible to these variants. Three host differential cultivars namely ICP 9174, BDN-2 and Bahar (ICP 7197) were found resistant to most of the F. udum isolates. Conclusion The present study generated significant information in terms of variants of F. udum which could be used further for the deployment of location-specific wilt resistant cultivars for optimized disease-management strategies. Study is also useful for development of broad-based wilt resistant cultivars to curtail the possible epidemics.
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- 2022
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15. Stability and suitability of genotypes and environment to Ascochyta blight of chickpea
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Mamta Sharma, U. S. Sharath Chandran, Upasana Rani, Sudhir K. Singh, Ashwani K. Basandrai, and Daisy Basandrai
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Ascochyta blight ,chickpea ,multi-environment testing ,G x E interaction ,GGE biplots ,principal component analysis ,Plant culture ,SB1-1110 - Abstract
Ascochyta blight (AB) is a major biotic constraint to chickpea production internationally. The disease caused by the phytopathogenic fungus Ascochyta rabiei is highly favored by prolonged spells of low temperature and high humidity. The disease scenario is expected to aggravate in the near future as a result of rapidly changing climatic conditions and the emergence of fungicide-resistant pathogen strains. Tapping into host–plant resistance is the most logical way to preempt such a crisis. Presently, high levels of stable resistance against AB are yet to be identified from the chickpea gene pool. The present study was aimed at facilitating this process through multi-environment testing of chickpea genotypes. Using the GGE biplot analysis method, we could identify three genotypes, viz., ICCV 16508, ICCV 16513, and ICCV 16516, from the International Ascochyta Blight Nursery, which showed consistent moderate resistance reactions across all the tested environments. Moreover, we were able to evaluate the test locations for their suitability to support AB screening trials. Ludhiana and Palampur locations were identified as the most ideal for continual screening in the future. Controlled environment screening at the ICRISAT location offered to reduce large plant populations to small meaningful sizes through initial screening under controlled environment conditions. This study will further improve the scope of phenotyping and sources of stable resistance to be utilized in future AB resistance breeding programs.
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- 2023
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16. Genetic enhancement of Trichoderma asperellum biocontrol potentials and carbendazim tolerance for chickpea dry root rot disease management.
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Ramangouda G, M K Naik, Rahul B Nitnavare, Richa Yeshvekar, Joorie Bhattacharya, Pooja Bhatnagar-Mathur, and Mamta Sharma
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Medicine ,Science - Abstract
Advances in biocontrol potentials and fungicide resistance are highly desirable for Trichoderma. Thus, it is profitable to use mutagenic agents to develop superior strains with enhanced biocontrol properties and fungicide tolerance in Trichoderma. This study investigates the N-methyl-n-nitro-N-nitrosoguanidine (NTG) (100 mg/L) induced mutants of Trichoderma asperellum. Six NTG (3 each from 1st & 2nd round) induced mutants were developed and evaluated their biocontrol activities and carbendazim tolerance. Among the mutant N2-3, N2-1, N1 and N2-2 gave the best antagonistic and volatile metabolite activities on inhibition of chickpea F. oxysporum f. sp. ciceri, B. cinerea and R. bataticola mycelium under in vitro condition. Mutant N2-2 (5626.40 μg/ml) showed the highest EC50 value against carbendazim followed by N2-3 (206.36 μg/ml) and N2-1 (16.41 μg/ml); and succeeded to sporulate even at 2000 μg/ml of carbendazim. The biocontrol activity of N2-2 and N2 with half-dose of carbendazim was evaluated on chickpea dry root rot under controlled environment. Disease reduction and progress of the dry root rot was extremely low in T7 (N2-2 + with half-dose of carbendazim) treatment. Further, carbendazim resistant mutants demonstrated mutation in tub2 gene of β-tubulin family which was suggested through the 37 and 183 residue changes in the superimposed protein structures encoded by tub2 gene in N2 and N2-2 with WT respectively. This study conclusively implies that the enhanced carbendazim tolerance in N2-2 mutant did not affect the mycoparasitism and plant growth activity of Trichoderma. These mutants were as good as the wild-type with respect to all inherent attributes.
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- 2023
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17. Standardization of protocol for in vitro tuberization in potato (Solanum tuberosum) cultivar Kufri Sindhuri
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MANMOHAN SHARMA, MAMTA SHARMA, ROMESH KUMAR SALGOTRA, MRIDHU SHARMA, and ANJANI K SINGH
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Chlororcholine chloride ,In vitro ,Microtubers ,Photoperiod ,Potato ,Sucrose ,Agriculture - Abstract
Potato (Solanum tuberosum L.) is an economically important dicotyledonous and tuber crop which is ranked as the fourth most cultivated food crop after wheat, rice and maize. Asexual propagation of potato is done through tubers which are prone to large number of fungal and viral diseases. Microtubers produced through tissue culture serve as an essential component for production of disease-free quality potato seed. The present study was carried out during 2018 and 2019 at School of Biotechnology, Sher-e-Kashmir University of Agriculture Science and Technology of Jammu, Jammu to standardize in vitro microtuber production protocol in potato variety Kufri Sindhuri using different explants. Nodal segments were the most suitable explants for culture establishment which resulted in maximum survival with least contamination and mortality. Murashige and Skoog medium supplemented with BAP (1.5 mg/litre) and NAA (0.1 mg/litre) resulted in 100% shoot regeneration with 3.75 shoots per explant. Vigorous shoot proliferation was achieved by fortification of calcium pentothenate (2 mg/litre) and gibberellic acid (0.25 mg/litre) in establishment medium. Pre-tuberization was done by incubating cultures for 28 days in liquid multiplication medium supplemented with NAA (0.5 mg/litre). Maximum microtubers (24) per culture flask were obtained in 10 days when tuberization medium was fortified with 80 g/litre of sucrose while maximum diameter of 0.9 cm was recorded in the presence of growth retardant chlorocholine chloride (500 mg/litre). Complete darkness was an essential factor for microtuber induction. The harvested microtubers (G0) were stored at 4°C after treating them with fungicides.
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- 2023
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18. Antimicrobial Potential and Chemical Profiling of Leaves Essential Oil of Mentha Species Growing under North-West Himalaya Conditions
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Sonam, Amita Kumari, Vikas Kumar, Ishita Guleria, Mamta Sharma, Ashwani Kumar, Mashael W. Alruways, Nazam Khan, and Ravinder Raina
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disc diffusion method ,poisoned food technique ,harvesting period ,gas chromatography-mass spectrometry ,Microbiology ,QR1-502 - Abstract
Mentha essential oil is one of the most utilized essential oil in the food and pharmaceutical industries. The present study reports the chemical composition and antibacterial properties of leaf essential oils of Mentha species. Further, the effect of the harvesting period on essential oil yield was also investigated. Firstly, the cultivated Mentha piperita and wild Mentha longifolia, revealed significant differences in their chemical profile. M. longifolia essential oil was characterized with endo-borneol (1.12-6.2%), caryophyllene (2.72-7.03%), isopipertenone (0.07-0.36%), germacrene D (0.98-3.22%), 3-cyclopentene-1-one,2-hydroxy-3-(3-methyl-2-butenyl)- (21.91-56.72%) and piperitone oxide (8.96-39.31%), whereas, M. piperita leaves essential oil was found rich in isomenthone (5.97-6.75%), 1-menthone (7.32-18.32%) and menthol (18.03-58.53%), etc. The essential oils of both Mentha species exhibited strong antimicrobial activity as evaluated using poisoned food technique, dry weight method, and disc diffusion method against Candida albicans, Fusarium oxysporum, Bacillus subtilis, Staphylococcus aureus, Klebsiella pneumoniae and Escherichia coli. Secondly, the maximum essential oil yield was observed in July month, 0.63±0.01 and 0.56±0.01%, respectively for M. piperita and M. longifolia.
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- 2021
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19. AMMI and GGE Biplot Analyses for Mega-Environment Identification and Selection of Some High-Yielding Oat (Avena sativa L.) Genotypes for Multiple Environments
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Kibreab Yosefe Wodebo, Taye Tolemariam, Solomon Demeke, Weyessa Garedew, Tessema Tesfaye, Muluken Zeleke, Deribe Gemiyu, Worku Bedeke, Jane Wamatu, and Mamta Sharma
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oat (Avena sativa L.) ,biomass yield ,GXE Interaction ,AMMI ,GGE ,Botany ,QK1-989 - Abstract
This paper reports an evaluation of eleven oat genotypes in four environments for two consecutive years to identify high-biomass-yielding, stable, and broadly adapted genotypes in selected parts of Ethiopia. Genotypes were planted and evaluated with a randomized complete block design, which was repeated three times. The additive main effect and multiplicative interaction analysis of variances revealed that the environment, genotype, and genotype–environment interaction had a significant (p ≤ 0.001) influence on the biomass yield in the dry matter base (t ha−1). The interaction of the first and second principal component analysis accounted for 73.43% and 14.97% of the genotype according to the environment interaction sum of squares, respectively. G6 and G5 were the most stable and widely adapted genotypes and were selected as superior genotypes. The genotype-by-environment interaction showed a 49.46% contribution to the total treatment of sum-of-squares variation, while genotype and environment effects explained 34.94% and 15.60%, respectively. The highest mean yield was obtained from G6 (12.52 kg/ha), and the lowest mean yield was obtained from G7 (8.65 kg/ha). According to the additive main effect and multiplicative interaction biplot, G6 and G5 were high-yielding genotypes, whereas G7 was a low-yielding genotype. Furthermore, according to the genotype and genotype–environment interaction biplot, G6 was the winning genotype in all environments. However, G7 was a low-yielding genotype in all environments. Finally, G6 was an ideal genotype with a higher mean yield and relatively good stability. However, G7 was a poor-yielding and unstable genotype. The genotype, environment, and genotype x environment interaction had extremely important effects on the biomass yield of oats. The findings of the graphic stability methods (additive main effect and multiplicative interaction and the genotype and genotype–environment interaction) for identifying high-yielding and stable oat genotypes were very similar.
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- 2023
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20. Morphological and Morphometric Study of Spleen in Cadavers of Doaba Region of Punjab, India
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Jasveen Kaur, Mamta Sharma, and Ambica Wadhwa
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morphometry ,splenic notches ,splenomegaly ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Surgery ,RD1-811 - Abstract
Introduction: Spleen is a clinically important haemolymphoid organ. It can show a wide range of morphological variation. Size of spleen varies with age and in certain disorders. Splenomegaly is an important diagnostic tool in understanding the aetiology of various diseases. Aim: To study the morphology, and analyse the morphometric dimensions of cadaveric spleens of Doaba region of Punjab. Materials and Methods: The cross-sectional study was conducted in the Department of Anatomy at Punjab Institute of Medical Sciences, Jalandhar, Punjab, India. A total of 30 formalin fixed cadaveric spleens of both sexes were studied. The spleen specimens were observed for their morphological features and various morphometric parameters were measured on them. Results: In the present study, the length of spleen ranged from 6.27-15.01 cm, and the mean length was 10.45±1.94 cm. The range of breadth was between 4.78 cm and 10.00 cm, and with the mean of 7.12±1.50 cm. The width of spleen varied from 2.96-6.50 cm, with the mean of 4.20±1.11 cm. Weight of spleen ranged between 34.35-269.25 g, and the mean weight was 139.08±63.07 g. On the superior border, the number of notches varied from 0-4, whereas on inferior border upto 3 notches were seen. The shape of spleen was wedge in majority (53.33%) of the specimens. Conclusion: In the present study, the morphological and morphometric analysis of spleen in Doaba region of Punjab was found to be comparable to the other regions of India. However, it was observed that the mean length was comparatively higher. Also, the number of spleens with notches on both the superior and inferior borders were higher compared to other Indian studies.
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- 2022
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21. Enhanced Acetone Sensing Based on Group-11 Metal (Cu, Ag, and Au) Nanoparticles Embedded in Graphitic Carbon Nitride (gCN)
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Nihal, Rahul Sharma, Navjot Kaur, Mamta Sharma, B. C. Choudhary, and J. K. Goswamy
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acetone ,gCN ,sensing ,transition metals ,VOCs ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
In this work, a group-11 metal nanoparticle-embedded, graphitic carbon nitride-based, resistive-type sensor was developed for room temperature acetone sensing. We synthesized pure and group-11 transition metal (Cu, Ag and Au) nanoparticles embedded in graphitic carbon nitride (gCN) by thermal polycondensation and chemical reduction methods. The synthesized material was characterized using UV/visspectroscopy, FTIRspectroscopy, XRD, HRTEM, FESEM, and EDS techniques. Sensing properties such as response, response/recovery time, selectivity, and stability were calculated. This study confirms that Ag/gCN is the best material for room temperature sensing of acetone compared to Cu/gCN, Au/gCN, and pure gCN. The response of Ag/gCN for 20 ppm acetone at room temperature is 28%. The response/recovery time is 42.05/37.09 s. Moreover, the response of Ag/gCN is stable for 10 days.
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- 2023
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22. Understanding Antioxidant Abilities of Dihydroxybenzenes: Local and Global Electron Transfer Properties
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Priyanka Chauhan, Gururaj Kudur Jayaprakash, Isha Soni, Mamta Sharma, Juan Pablo Mojica-Sànchez, Shashanka Rajendrachari, and Praveen Naik
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quantum chemical descriptors ,analytical Fukui ,DFT ,antioxidant ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
In the current work, globally based on Koopmans’ approximation, local electron transport characteristics of dihydroxybenzenes have been examined using the density functional theory for understanding their antioxidant activity. Our experimental and theoretical studies show that hydroquinone has better antioxidant activities when compared to resorcinol and catechol. To identify the antioxidant sites for each dihydroxybenzene molecule, an average analytical Fukui analysis was used. The typical Fukui analytical results demonstrate that dihydroxybenzene oxygen atoms serve as antioxidant sites. The experimental and theoretical results are in good agreement with each other; therefore, our results are reliable.
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- 2023
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23. Minimal genome-wide human CRISPR-Cas9 library
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Emanuel Gonçalves, Mark Thomas, Fiona M. Behan, Gabriele Picco, Clare Pacini, Felicity Allen, Alessandro Vinceti, Mamta Sharma, David A. Jackson, Stacey Price, Charlotte M. Beaver, Oliver Dovey, David Parry-Smith, Francesco Iorio, Leopold Parts, Kosuke Yusa, and Mathew J. Garnett
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CRISPR-Cas9 ,Genome-wide ,Minimal library ,Organoid ,KS score ,Biology (General) ,QH301-705.5 ,Genetics ,QH426-470 - Abstract
Abstract CRISPR guide RNA libraries have been iteratively improved to provide increasingly efficient reagents, although their large size is a barrier for many applications. We design an optimised minimal genome-wide human CRISPR-Cas9 library (MinLibCas9) by mining existing large-scale gene loss-of-function datasets, resulting in a greater than 42% reduction in size compared to other CRISPR-Cas9 libraries while preserving assay sensitivity and specificity. MinLibCas9 provides backward compatibility with existing datasets, increases the dynamic range of CRISPR-Cas9 screens and extends their application to complex models and assays.
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- 2021
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24. Salient Findings on Host Range, Resistance Screening, and Molecular Studies on Sterility Mosaic Disease of Pigeonpea Induced by Pigeonpea sterility mosaic viruses (PPSMV-I and PPSMV-II)
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B. R. Sayiprathap, A. K. Patibanda, V. Prasanna Kumari, K. Jayalalitha, H. K. Ramappa, E. Rajeswari, L. Karthiba, K. Saratbabu, Mamta Sharma, and H. K. Sudini
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Cajanus cajan ,SMD ,PPSMV-I ,PPSMV-II ,host-range ,host-plant resistance (HPR) ,Microbiology ,QR1-502 - Abstract
Two distinct emaraviruses, Pigeonpea sterility mosaic virus-I (PPSMV-I) and Pigeonpea sterility mosaic virus-II (PPSMV-II) were found to be associated with sterility mosaic disease (SMD) of pigeonpea [Cajanus cajan (L.) Millsp.]. The host range of both these viruses and their vector are narrow, confined to Nicotiana benthamiana identified through mechanical transmission, and to Phaseolus vulgaris cvs. Top Crop, Kintoki, and Bountiful (F: Fabaceae) through mite transmission. A weed host Chrozophora rottleri (F: Euphorbiaceae) was also infected and tested positive for both the viruses in RT-PCR. Among the wild Cajanus species tested, Cajanus platycarpus accessions 15661, 15668, and 15671, and Cajanus scarabaeoides accessions 15683, 15686, and 15922 were infected by both the viruses and mite vector suggesting possible sources of SMD inoculum. Though accession 15666 of C. platycarpus, 15696 of C. scarabaeoides, and 15639 of Cajanus lanceolatus were infected by both the viruses, no mite infestation was observed on them. Phylogenetic analysis of nucleotide sequences of RNA-1 and RNA-2 of PPSMV-I and PPSMV-II isolates in southern India revealed significant divergence especially PPSMV-II, which is closely related to the Fig mosaic virus (FMV) than PPSMV-I. In multilocation testing of pigeonpea genotypes for their broad-based resistance to SMD for two consecutive years, genotypes ICPL-16086 and ICPL-16087 showed resistance reaction (
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- 2022
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25. Endoscopic Ultrasound-Guided Angiotherapy for Gastric Varices—A Small Retrospective Study
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Kapil Sharma, Mamta Sharma, and Sanchit Singh
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gastric varices ,coil ,cyanoacrylate glue and eus ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Introduction Conventional n-butyl-cyanoacrylate (CYA) recommended for secondary prophylaxis of gastric varices (GV) is associated with significant rebleeding and glue embolism. Limited data are available on more successful and less risky endoscopic ultrasound-guided coils and CYA (EUS-Coils-CYA) injection in GV. Methods We present a retrospective case series of 12 patients with GV bleeding managed successfully with EUS-Coils-CYA injection leading to variceal eradication in 11 patients. Results From January 2018 to June 2019, 12 cases of GV, which were either bleeding or bled recently, were included. Complete obliteration was achieved in 91.6% of patients with 100% technical success. Mean number of deployed coils and volume of injected CYA glue were 1.16 and 1.58 mL, respectively. Conclusions EUS-guided angiotherapy is an effective and safe intervention for managing GV bleeding with high technical success rate.
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- 2020
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26. Antimicrobial Agents Based on Metal Complexes: Present Situation and Future Prospects
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Bharti Sharma, Sudeep Shukla, Rohit Rattan, Musarrat Fatima, Mayurika Goel, Mamta Bhat, Shruti Dutta, Rakesh Kumar Ranjan, and Mamta Sharma
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Biotechnology ,TP248.13-248.65 - Abstract
The rise in antimicrobial resistance is a cause of serious concern since the ages. Therefore, a dire need to explore new antimicrobial entities that can combat against the increasing threat of antibiotic resistance is realized. Studies have shown that the activity of the strongest antibiotics has reduced drastically against many microbes such as microfungi and bacteria (Gram-positive and Gram-negative). A ray of hope, however, was witnessed in early 1940s with the development of new drug discovery and use of metal complexes as antibiotics. Many new metal-based drugs were developed from the metal complexes which are potentially active against a number of ailments such as cancer, malaria, and neurodegenerative diseases. Therefore, this review is an attempt to describe the present scenario and future development of metal complexes as antibiotics against wide array of microbes.
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- 2022
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27. Synthesis and characterization of WO3–SnO2/rGO nanocomposite for Propan-2-ol sensing
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Nihal, Rahul Sharma, Mamta Sharma, and J.K. Goswamy
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rGO ,Sensor ,SnO2 ,VOCs ,Propan-2-ol ,WO3 ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Volatile organic compounds (VOCs) are hazardous for both environment and human health. With increase in the usage of VOCs containing products, the extent of hazard is inceasing at an alarming rate. Therefore, the monitoring and sensing of VOCs become a need of the hour. Keeping in view, in the present work, We had studied the effect of rGO doping on the sensing performance of WO3–SnO2 mixed metal oxide for Propan-2-ol. The optical characterization of as-prepared samples were done using UV/Vis and FTIR spectroscopy. The structural and morphological analysis was studied using XRD and FESEM technique, respectively. The electrical studies were checked by I–V measurements. The sensing parameters such as sensitivity, response, recovery time, effect of temperature and concentrations, as well as stability were also studied. .
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- 2022
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28. Evaluation of Fungicides and Fungicide Application Methods to Manage Phytophthora Blight of Pigeonpea
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Mamta Sharma, Ramanagouda Gaviyappanavar, and Avijit Tarafdar
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pigeonpea ,Phytophthora cajani ,sporangia ,zoospores ,fungicides ,Agriculture (General) ,S1-972 - Abstract
Phytophthora, a blight of pigeonpea caused by Phytophthora cajani, has been significantly increasing in major pigeonpea production regions of India. Limited information on infection with this pathogen and its epidemiology, as well as a lack of adequate resistant cultivars, is hampering the management of Phytophthora blight significantly. Therefore, five fungicides, viz., metiram + dimethomorph, cymoxanil + mancozeb, famoxadone + cymoxanil, mancozeb, and metalaxyl-M + mancozeb, were evaluated against P. cajani under control conditions to control zoospore induction, as well as the infection of zoospores, at the seedling stage. The half-maximal effective concentration (EC50) of fungicides for mycelial inhibition was calculated. The lowest EC50 was recorded in metiram + dimethomorph (0.17 µg/mL), followed by the metalaxyl-M + mancozeb (2.49 µg/mL) and cymoxanil + mancozeb (8.23 µg/mL) fungicides. The formation of the sporangium and zoospores was most significantly affected by metalaxyl-M + mancozeb, followed by metiram + dimethomorph and cymoxanil + mancozeb, in terms of sporangia viability and zoospore germination and encystment. Further, under glasshouse conditions, different fungicide application methods (e.g., seed-treatment; soil-drench; foliar-spray, either singly or in combinations) were evaluated with fungicides on susceptible (ICP 7119) moderately resistant pigeonpea (ICPL 99010, ICPL 20135 and ICPL 99048) cultivars. The seed-treatment + soil-drench, soil-drench + foliar-spray, and soil-drench of fungicide application methods were found to be effective in controlling the Phytophthora blight, at p < 0.001. A combination of the seed-treatment + soil-drench and soil-drench + foliar-spray methods, using metalaxyl-M + mancozeb or metiram + dimethomorph fungicides on moderately resistant cultivars (ICPL 99010), has a synergistic effect on the ability to control the Phytophthora blight at the seedling stage.
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- 2023
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29. Structural, morphological, optical and biomedical applications of Berberis aristata mediated ZnO and Ag-ZnO nanoparticles
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Deepak Sharma, Ankush Chauhan, Ritesh Verma, Swati kumari, Pankaj Thakur, Ambrish K Mahajan, Vinod Kumar, and Mamta Sharma
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nanoparticles ,green synthesis ,biomedical applications ,x-ray diffraction ,UV–visible spectroscopy ,Chemical technology ,TP1-1185 - Abstract
Herein, we prepared the zinc oxide (ZnO) and silver doped zinc oxide (Ag-ZnO) nanoparticles (NPs) using Berberis aristata plant extract as a reducing, capping and stabilizing agent. The x-ray diffraction (XRD) pattern confirms the formation of pure hexagonal wurtzite structure for both the samples with P4mm space group. The crystallite size reduces from 21.313 nm to 18.179 nm with the Scherrer technique with doping of Ag ions on ZnO NPs, while the Williamson Hall (WH) approach likewise demonstrates a decrease in crystallite size from 26.602 nm to 21.522 nm. The lattice strain increases from 0.0031 to 0.0064, indicating the presence of Ag-ions in the crystal lattice of ZnO NPs. For both samples, the metal-oxygen bond formation is supported by the Fourier Transform Infrared (FTIR) spectra. For ZnO, the peak in the UV-visible spectrum is approximately around 365 nm, but for Ag-ZnO, two peaks are observed around 235 nm and 360 nm. With the Ag doping, the bandgap increases from 3.01 eV to 3.02 eV. Transmission Electron Microscopy (TEM) micrographs show the formation of crystalline particles and Field Emission Scanning Electron Microscopy (FESEM) pictures show the formation of aggregated NPs with a spherical shape. Energy Dispersive x-ray Spectroscopy (EDX) and x-ray Photoelectron Spectroscopy (XPS) demonstrate the chemical purity of both the samples. The antibacterial activity of ZnO NPs was highest against Staphylococcus aureus i.e., 15 ± 0.53 mm, whereas, for Ag-ZnO NPs the highest activity was against Salmonella typhi i.e., 19 ± 0.53 mm.
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- 2023
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30. Gemella endocarditis: A case report and a review of the literature
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Dima Youssef, Ibrahim Youssef, Tariq S Marroush, and Mamta Sharma
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endocarditis ,gemella haemolysans ,mitral ,regurgitation ,Medicine - Abstract
Infective endocarditis (IE) remains a prevalent disease with a high rate of morbidity and mortality. Recent changes have been noted in the profile of causative microorganisms. In this report, we describe a case of Gemella-related endocarditis and review the related literature. Our patient was an 81-year-old man who presented with dyspnea and fatigue. His initial examination revealed a new systolic murmur. Echocardiogram revealed moderate mitral regurgitation with 1-cm mass on the anterior mitral leaflet, and blood cultures grew Gemella haemolysans. Penicillin and gentamicin were initiated, and workup for possible source was positive for a colonic polyp with high-grade dysplasia. The patient subsequently developed cardiogenic shock and severe pulmonary edema. Comfort care measures were initiated, and he passed away thereafter. We reviewed PubMed for cases of Gemella-related endocarditis. We found 65 documented cases and added our patient’s case to the analysis. Seventy-two percent of the cases occurred in men. The mean age was 51 years and 42% of the patients were older than 60 years. Fever was the most common presenting symptom and most of the cases presented subacutely. The mitral valve was the most affected site and 50% of the patients required surgical intervention. G. morbillorum was the most common subtype and a total of four cases were found to be associated with colorectal neoplasm. As a conclusion, Gemella species rarely cause IE. The absence of a clear source of bacteremia warrants further evaluation for a gastrointestinal source. The infection can be destructive and must be promptly treated to avoid complications. morbillorum Key messages: Gemella endocarditis is a serious infection with significant morbidity and mortality. It must be promptly treated to avoid further complications.
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- 2019
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31. Temperature and Soil Moisture Stress Modulate the Host Defense Response in Chickpea During Dry Root Rot Incidence
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U. S. Sharath Chandran, Avijit Tarafdar, H. S. Mahesha, and Mamta Sharma
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Rhizoctonia bataticola ,dry root rot ,disease susceptibility index ,combined stress ,differential gene expression ,Plant culture ,SB1-1110 - Abstract
Dry root rot caused by the necrotrophic phytopathogenic fungus Rhizoctonia bataticola is an emerging threat to chickpea production in India. In the near future, the expected increase in average temperature and inconsistent rainfall patterns resultant of changing climatic scenarios are strongly believed to exacerbate the disease to epidemic proportions. The present study aims to quantify the collective role of temperature and soil moisture content (SMC) on disease progression in chickpea under controlled environmental conditions. In our study, we could find that both temperature and soil moisture played a decisive role in influencing the dry root rot disease scenario. As per the disease susceptibility index (DSI), a combination of high temperature (35°C) and low SMC (60%) was found to elicit the highest disease susceptibility in chickpea. High pathogen colonization was realized in chickpea root tissue at all time-points irrespective of genotype, temperature, and SMC. Interestingly, this was in contrast to the DSI where no visible symptoms were recorded in the roots or foliage during the initial time-points. For each time-point, the colonization was slightly higher at 35°C than 25°C, while the same did not vary significantly with respect to SMC. Furthermore, the differential expression study revealed the involvement of host defense-related genes like endochitinase and PR-3-type chitinase (CHI III) genes in delaying the dry root rot (DRR) disease progression in chickpea. Such genes were found to be highly active during the early stages of infection especially under low SMC.
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- 2021
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32. Synthesis and characterization of Ag metal doped SnO2, WO3 and WO3–SnO2 for propan-2-ol sensing
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Nihal, Sonal Rattan, Manpreet, Anjali, Harjot, Suresh Kumar, Mamta Sharma, S.K. Tripathi, and J.K. Goswamy
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Ag ,Sensor ,SnO2 ,VOCs ,Propn-2-ol ,WO3 ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Due to increase in environmental degradation, the careful monitoring of various hazardous gases and Volatile organic compounds become one of the chief topic of interest. One such hazardous VOC is Propan-2-ol which is a colorless, highly flammable compound with a strong odour. This compound have various applications but at the same time there are several health hazards associated with this compound. In this present work, the sensing of Propan-2-ol is done by using WO3–SnO2/Ag nanocomposite synthesized by solid state assisted hydrothermal method. The optical characterizations were done using UV/Vis and FTIR spectroscopy. The structural characterization was done using XRD technique. The morphological characterizations were done using FESEM and EDS technique. Electrical characterization were done from IV graphs. From these electrical characterizations the value of selectivity is calculated and the variation of response with time is studied.
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- 2021
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33. Do risk factors at the time of hospital admission differ by sex for in-hospital mortality from coronavirus disease 2019 (COVID-19)?
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Mamta Sharma, Ashish Bhargava, Susanna M. Szpunar, Leonard B. Johnson, and Louis D. Saravolatz
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Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background: Sex-disaggregated data for coronavirus disease 2019 (COVID-19) reported higher hospitalized fatality rates among men than women. Objective: To determine whether the risk factors for in-hospital mortality from COVID-19, present at the time of hospital admission, differed by patient sex. Design and setting: Single-center, retrospective cohort study at a tertiary-care urban academic center. Methods: We reviewed the electronic medical records of patients positive for COVID-19 via qualitative polymerase chain reaction (PCR) assay, admitted between March 8 and June 14, 2020. Patients were stratified by sex to assess the association of variables present on admission with in-hospital mortality. Results: The overall inpatient case fatality rate (CFR) was 30.4% (172 of 565). The CFR among male patients was higher than among female patients: 99 (33.7%) versus 73 (26.9%), respectively (P = .08). Among males, comorbid conditions associated with in-hospital mortality were chronic pulmonary disease (P = .02) and connective tissue disease (P = .03). Among females, these comorbid conditions were congestive heart failure (P = .03), diabetes with complication (P = .05), and hemiplegia (P = .02). Variables that remained independently associated with death in males included age >70 years, public insurance, incremental increase in quick sepsis-related organ failure assessment (qSOFA) and C-reactive protein (CRP), lymphocytopenia, and thrombocytopenia. Among females, variables that remained independently associated with mortality included public insurance, incremental increase in Charlson weighted index of comorbidity (CWIC) score, qSOFA, and CRP. Conclusions: Risk factors for in-hospital mortality by sex included public insurance type, incremental increase in qSOFA and CRP in both sexes. For male patients, older age, lymphocytopenia and thrombocytopenia were also associated with mortality, whereas a higher Charlson score was associated with in-hospital mortality in female patients.
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- 2021
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34. Vermicompost and Its Derivatives against Phytopathogenic Fungi in the Soil: A Review
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Kasahun Gudeta, Ankeet Bhagat, Jatinder Mohan Julka, Reshma Sinha, Rachna Verma, Arun Kumar, Shailja Kumari, Fuad Ameen, Sartaj Ahmad Bhat, Ryszard Amarowicz, and Mamta Sharma
- Subjects
coelomic fluid ,earthworm ,fungal pathogen ,vermiwash ,vermicompost ,Plant culture ,SB1-1110 - Abstract
Synthetic chemicals, such as fertilizers and pesticides, are abundantly used in agriculture to enhance soil fertility and prevent the occurrence of diseases, respectively. Many studies have reported a negative influence of these chemicals on the soil environment. Natural sources from earthworms and their products, as a result of vermicomposting, may be considered better alternatives. The aim of this review was to reveal the source of antifungal efficiency of vermicompost and its derivatives, such as vermiwash, coelomic fluid, skin secretion of earthworms, and metabolites from decomposer bacteria in vermicompost, in order to highlight their application in agriculture. The synergistic activity of bioactive compounds present in coelomic fluid, mucus, skin secretion, and metabolites from associated bacteria (decomposer) assisted crop plants for effective action against various soil pathogenic fungi, such as Rhizoctoniasolani, Alternaria solani, Aspergillus niger, A.flavus, Fusariumoxysporum, and F. graminearum. Thus, these bioactive metabolites can be recommended to suppress plant fungal diseases. Vermicompost and its derivatives should be considered for use in agricultural fields to control harmful soil fungi and increase crop productivity.
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- 2022
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35. Molecular Analysis of Disease-Responsive Genes Revealing the Resistance Potential Against Fusarium Wilt (Fusarium udum Butler) Dependent on Genotype Variability in the Leguminous Crop Pigeonpea
- Author
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Koushik Biswas, Avijit Tarafdar, Roshan Kumar, Nirjara Singhvi, Parthadeb Ghosh, Mamta Sharma, Sunil Pabbi, and Pratyoosh Shukla
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disease incidence ,Fusarium udum ,gene expression ,innate resistance ,pathogenesis ,pigeonpea ,Genetics ,QH426-470 - Abstract
Fusarium wilt (FW), caused by Fusarium udum Butler (FU), is among the challenging factors in the production of pigeonpea. Therefore, exploring a superior pigeonpea genotype from landraces or local cultivars through the selection of innate resistance to FW using different biological and molecular approaches, and validating its resistance response, could be an alternative to sustainable crop improvement. Five distinct pigeonpea genotypes, with resistant (ICP2894) and susceptible (ICP2376) controls, were selected on the basis of the incidence percentage of FW, from three different states of India. Among them, the cultivar Richa, which displayed low incidence of FW (10.0%) during the genotype evaluation, was further examined for its innate resistance to FW. Molecular characterization of antioxidant (AO) enzyme [APX and SOD] and pathogenesis-related (PR) protein [CHS and β-1, 3-glucanase] families were performed. The obtained results of reverse transcription-polymerase chain reaction-based expression study and in silico analysis showed a higher level of induction of PR and AO genes, and the strong interaction of their putative proteins with fungal cellobiohydrolase-c protein established their antifungal activity, conferring early plant defense responses to FU in Richa. Our study demonstrated a strong and combinatorial approach involving biological assay, molecular experiments, and in silico analysis to identify a superior pigeonpea genotype that was resistant to FW across a major biogeographic region.
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- 2020
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36. An integrated research framework combining genomics, systems biology, physiology, modelling and breeding for legume improvement in response to elevated CO2 under climate change scenario
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Paramita Palit, Himabindu Kudapa, Robert Zougmore, Jana Kholova, Anthony Whitbread, Mamta Sharma, and Rajeev K Varshney
- Subjects
Carbon dioxide ,climate change ,legumes ,molecular intervention ,physiology ,Botany ,QK1-989 - Abstract
How unprecedented changes in climatic conditions will impact yield and productivity of some crops and their response to existing stresses, abiotic and biotic interactions is a key global concern. Climate change can also alter natural species’ abundance and distribution or favor invasive species, which in turn can modify ecosystem dynamics and the provisioning of ecosystem services. Basic anatomical differences in C3 and C4 plants lead to their varied responses to climate variations. In plants having a C3 pathway of photosynthesis, increased atmospheric carbon dioxide (CO2) positively regulates photosynthetic carbon (C) assimilation and depresses photorespiration. Legumes being C3 plants, they may be in a favorable position to increase biomass and yield through various strategies. This paper comprehensively presents recent progress made in the physiological and molecular attributes in plants with special emphasis on legumes under elevated CO2 conditions in a climate change scenario. A strategic research framework for future action integrating genomics, systems biology, physiology and crop modelling approaches to cope with changing climate is also discussed. Advances in sequencing and phenotyping methodologies make it possible to use vast genetic and genomic resources by deploying high resolution phenotyping coupled with high throughput multi-omics approaches for trait improvement. Integrated crop modelling studies focusing on farming systems design and management, prediction of climate impacts and disease forecasting may also help in planning adaptation. Hence, an integrated research framework combining genomics, plant molecular physiology, crop breeding, systems biology and integrated crop-soil-climate modelling will be very effective to cope with climate change.
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- 2020
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37. Temporal progress and spatial distribution of phytophthora blight of pigeonpea in Deccan plateau of India
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JADESHA G., MAMTA SHARMA, NARAYAN REDDY, and RAMESHWAR TELANGRE
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Agriculture - Published
- 2020
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38. Variability in Phytophthora drechsleri f. sp. cajani and Effect of Temperature
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Chandra Kant Singh, Ichini Sudhir, Ramesh Chand, Vineeta Singh, and Mamta Sharma
- Subjects
cajanus cajan ,phytophthora blight ,temperature ,Microbiology ,QR1-502 - Abstract
The present experiment was undertaken to study the cultural, morphological and pathological variation in six isolates of Phytophthora cajani. The isolates were collected from pigeonpea growing areas of eastern Uttar Pradesh. Isolates exhibited considerable variations in cultural characters and growth on potato dextrose agar medium. The universal ITS1 and ITS4 primers showed the difference among P. cajani isolates. There was significance influence of temperature on the growth of isolates, however isolates could not be differentiated based on the temperature. The average growth (1.69 cm2) at 30°C temperature was recorded with all the isolates followed by average growth (1.25 cm2) at 35°C temperature. The maximum radial growth (3.6 cm2) was observed at 96 h in isolate PDC015-1. The isolate PDC013-1 and PDC014-3 showed highest 47.0% plant mortality on ICP 7119 genotype. Among the isolates PDC014-3 killed 28.6% plants after 4th day of inoculation.
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- 2017
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39. Genotyping-by-sequencing of three mapping populations for identification of candidate genomic regions for resistance to sterility mosaic disease in pigeonpea
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Rachit K. Saxena, Sandip M. Kale, Vinay Kumar, Swathi Parupali, Shourabh Joshi, Vikas Singh, Vanika Garg, Roma R. Das, Mamta Sharma, K. N. Yamini, Anuradha Ghanta, Abhishek Rathore, C. V. Sameerkumar, K. B. Saxena, and Rajeev K. Varshney
- Subjects
Medicine ,Science - Abstract
Abstract Sterility mosaic disease (SMD) is one of the serious production constraints that may lead to complete yield loss in pigeonpea. Three mapping populations including two recombinant inbred lines and one F2, were used for phenotyping for SMD resistance at two locations in three different years. Genotyping-by-sequencing approach was used for simultaneous identification and genotyping of SNPs on above mentioned populations. In total, 212,464, 89,699 and 64,798 SNPs were identified in ICPL 20096 × ICPL 332 (PRIL_B), ICPL 20097 × ICP 8863 (PRIL_C) and ICP 8863 × ICPL 87119 (F2) respectively. By using high-quality SNPs, genetic maps were developed for PRIL_B (1,101 SNPs; 921.21 cM), PRIL_C (484 SNPs; 798.25 cM) and F2 (996 SNPs; 1,597.30 cM) populations. The average inter marker distance on these maps varied from 0.84 cM to 1.65 cM, which was lowest in all genetic mapping studies in pigeonpea. Composite interval mapping based QTL analysis identified a total of 10 QTLs including three major QTLs across the three populations. The phenotypic variance of the identified QTLs ranged from 3.6 to 34.3%. One candidate genomic region identified on CcLG11 seems to be promising QTL for molecular breeding in developing superior lines with enhanced resistance to SMD.
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- 2017
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40. Construction of genotyping-by-sequencing based high-density genetic maps and QTL mapping for fusarium wilt resistance in pigeonpea
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Rachit K. Saxena, Vikas K. Singh, Sandip M. Kale, Revathi Tathineni, Swathi Parupalli, Vinay Kumar, Vanika Garg, Roma R. Das, Mamta Sharma, K. N. Yamini, S. Muniswamy, Anuradha Ghanta, Abhishek Rathore, C. V. Sameer Kumar, K. B. Saxena, P. B. Kavi Kishor, and Rajeev K. Varshney
- Subjects
Medicine ,Science - Abstract
Abstract Fusarium wilt (FW) is one of the most important biotic stresses causing yield losses in pigeonpea. Genetic improvement of pigeonpea through genomics-assisted breeding (GAB) is an economically feasible option for the development of high yielding FW resistant genotypes. In this context, two recombinant inbred lines (RILs) (ICPB 2049 × ICPL 99050 designated as PRIL_A and ICPL 20096 × ICPL 332 designated as PRIL_B) and one F2 (ICPL 85063 × ICPL 87119) populations were used for the development of high density genetic maps. Genotyping-by-sequencing (GBS) approach was used to identify and genotype SNPs in three mapping populations. As a result, three high density genetic maps with 964, 1101 and 557 SNPs with an average marker distance of 1.16, 0.84 and 2.60 cM were developed in PRIL_A, PRIL_B and F2, respectively. Based on the multi-location and multi-year phenotypic data of FW resistance a total of 14 quantitative trait loci (QTLs) including six major QTLs explaining >10% phenotypic variance explained (PVE) were identified. Comparative analysis across the populations has revealed three important QTLs (qFW11.1, qFW11.2 and qFW11.3) with upto 56.45% PVE for FW resistance. This is the first report of QTL mapping for FW resistance in pigeonpea and identified genomic region could be utilized in GAB.
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- 2017
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41. Induced Systemic Resistance and Evaluation of Bio-control Agents for Management of Pigeonpea Wilt Caused by Fusarium udum
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B.M. Ravikumara, M.K. Naik, Mamta Sharma, Gururaj Sunkad, Ayyan Gouda Patil, S. Muniswamy, and K.P. Viswanath
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pigeonpea ,fungicide ,biocontrol ,induced systemic resistance ,fusarium udum ,pseudomonas ,trichoderma ,pgpr ,Microbiology ,QR1-502 - Abstract
The performance of the four fungal and two bacterial bioagents were evaluated for the bicontrol efficacy and ability to induce systemic resistance against Fusarium udum causing wilt of pigeonpea which is posing a serious threat to pigeonpea growing regions of India. Among the six isolates, maximum mycelial inhibition was noticed in Trichoderma harzianum (Th- R) as compared to other biocontrol agents. Among contact fungicides, maximum inhibition (> 75 %) of mycelium was recorded in Mancozeb and capton at 0.20 and 0.3 % concentrations. More than 90% inhibition was recorded among the systemic fungicides at all the all the concentrations except thiophanate methyl which recorded 53.67 % inhibition at 0.05 % concentration. Among different treatment combinations of biocontrol agents, the highest vigour index was recorded in P. fluorescense (RP- 46) + P. putida (RP- 56) treated seeds in both the cultivars (Moderately resistant and susceptible). The level of expression of defense related enzymes (PO, PPO & PAL) was more in moderately resistant cultivar(BSMR- 736) rather than susceptible one(ICP- 2376). In glass house experiment seeds treated with P. flourescens (RP- 46) + P. putida (RP-56) recorded least wilt incidence as compared to other treatments. In both Kharif seasons of 2013/14 and 2014/15 recorded significantly lowest wilt incidence and highest yield in soil drenching with 0.2 % Carbendazim fungicide. Among the biocontrol agents, seed treatment @4 g / kg seeds + soil application of PGPR (P. flourescens & P. putida) consortium @ 25kg/ ha in FYM @ 50 kg/ ha, recorded least wilt incidence and highest yield.
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- 2017
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42. Awake orotracheal fibre-optic intubation: Comparison of two different doses of dexmedetomidine on intubation conditions in patients undergoing cervical spine surgery
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Jaya Sharma, Shobha Purohit, Sonali Bhatia, Poonam Kalra, Mamta Sharma, and Reema Meena
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Airway blocks ,awake ,conscious sedation ,dexmedetomidine ,fibre-optic ,Anesthesiology ,RD78.3-87.3 - Abstract
Background and Aims: Awake fibre-optic intubation (AFOI) is an integral part of anaesthetic management of difficult airways. Conscious sedation is essential to assist AFOI. This study compared two different doses of dexmedetomidine in combination with topical spray and airway blocks for awake orotracheal fibre-optic intubation in patients undergoing elective cervical spine surgery with rigid cervical collar in situ. Methods: A randomized, prospective, comparative study design was conducted in sixty patients divided into two groups: Group (L) (n = 30) patients received low dose of dexmedetomidine (0.5 μg/kg) along with airway blocks and Group (H) (n = 30) patients received standard dose of dexmedetomidine (1 μg/kg) along with airway blocks. Both the groups received dexmedetomidine infusion over 10 min followed by airway block. Quantitative data were analysed by applying Student's t-test whereas qualitative data were analysed with Chi-square test. The objectives were to compare patients' Observer's Assessment of Alertness/Sedation scale (OAA/S) as primary outcome and other variables such as endoscopy, intubation condition, tolerance and haemodynamic stability among low and standard doses of dexmedetomidine. Results: Group H had more favourable OAA/S score than that of Group L, but endoscopy and intubation time, patient tolerance, vocal cord and limb movement and satisfaction score did not differ significantly between the groups. There were no significant haemodynamic differences between the two groups. Conclusion: The 0.5 μg/kg dose of dexmedetomidine was found optimal and effective in combination with topical spray and airway blocks for awake orotracheal fibre-optic intubation for patients undergoing elective cervical spine surgery.
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- 2017
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43. Development of an effective protocol for in vitro multiplication of peppermint (Mentha piperita)
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MANMOHAN SHARMA, MAMTA SHARMA, R K SALGOTRA, MEHAK GUPTA, ANJANI K SINGH, and L M GUPTA
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In vitro propagation ,Mentha piperita ,Medicinal plant ,Peppermint ,Agriculture - Abstract
Mentha piperita is a completely sterile hybrid due to the fact that male organs of flower fail to develop. The stamens remain abnormally short, sometimes degenerate and wither from bud. As a result it is not amenable to improvement by sexual crosses. Ruthless exploitation of peppermint due to growing interest in the commercialization of plant based medicines has lead to drastic decrease of natural resource base which will result in extinction. In order to meet pharmaceutical needs and to provent the plants from extinction, development of rapid large scale propagation systems is a necessity. In vitro multiplication was carried out for mass production of disease free planting material without seasonal constraints ensuring germplasm conservation and sustainable use of the medicinal crop.
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- 2019
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44. Evaluation and Identification of Promising Introgression Lines Derived From Wild Cajanus Species for Broadening the Genetic Base of Cultivated Pigeonpea [Cajanus cajan (L.) Millsp.]
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Shivali Sharma, Pronob J. Paul, C.V. Sameer Kumar, P. Jaganmohan Rao, L. Prashanti, S. Muniswamy, and Mamta Sharma
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pre-breeding ,introgression lines ,Cajanus cajanifolius ,Cajanus acutifolius ,AMMI ,wild Cajanus species ,Plant culture ,SB1-1110 - Abstract
Pigeonpea [Cajanus cajan (L.) Millsp.], a multipurpose and nutritious grain legume crop, is cultivated for its protein-rich seeds mainly in South Asia and Eastern and Southern Africa. In spite of large breeding efforts for pigeonpea improvement in India and elsewhere, genetic enhancement is inadequate largely due to its narrow genetic base and crop susceptibility to stresses. Wild Cajanus species are novel source of genetic variations for the genetic upgradation of pigeonpea cultivars. In the present study, 75 introgression lines (ILs), derived from crosses involving cultivated pigeonpea variety ICPL 87119 and wild Cajanus cajanifolius and Cajanus acutifolius from the secondary gene pool, were evaluated for yield and yield-attributing traits in diverse environments across locations and years. Restricted maximum likelihood (REML) analysis revealed large genetic variations for days to 50% flower, days to maturity, plant height, primary branches per plant, pods per plant, pod weight per plant, 100-seed weight, and grain yield per plant. Superior ILs with mid-early to medium maturity duration identified in this study are useful genetic resources for use in pigeonpea breeding. Additive main effects and multiplicative interaction (AMMI) analysis unfolded large influence of environment and genotype × environment interaction for variations in yield. A few lines such as ICPL 15023 and ICPL 15072 with yield stability were identified, while a number of lines were completely resistant (0%) to sterility mosaic diseases and/or Fusarium wilt. These lines are novel genetic resources for broadening the genetic base of pigeonpea and bring yield stability and stress tolerance. High-yielding lines ICPL 15010, ICPL 15062, and ICPL 15072 have been included in the initial varietal trials (IVTs) of the All India Coordinated Research Project (AICRP) on pigeonpea for wider evaluation across different agro-ecological zones in India for possible release as variety(ies).
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- 2019
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45. Exploring the Genetic Cipher of Chickpea (Cicer arietinum L.) Through Identification and Multi-environment Validation of Resistant Sources Against Fusarium Wilt (Fusarium oxysporum f. sp. ciceris)
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Mamta Sharma, Raju Ghosh, Avijit Tarafdar, Abhishek Rathore, Devashish R. Chobe, Anil V. Kumar, Pooran M. Gaur, Srinivasan Samineni, Om Gupta, Narendra Pratap Singh, D. R. Saxena, M. Saifulla, M. S. Pithia, P. H. Ghante, Deyanand M. Mahalinga, J. B. Upadhyay, and P. N. Harer
- Subjects
chickpea ,GGE biplot ,Fusarium wilt ,multi-year ,multi-environment ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
Fusarium wilt (Fusarium oxysporum f. sp. ciceris) of chickpea is the major limitation to chickpea production worldwide. As the nature of the pathogen is soil borne, exploitation of host plant resistance is the most suitable and economical way to manage this disease. Present study was therefore conducted with an aim to find new, stable and durable sources of resistance of chickpea against Fusarium wilt through multi-environment and multi-year screening. During 2007/2008 crop season, 130 promising genotypes having
- Published
- 2019
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46. Anaesthetic Management of a patient with Myasthenia Gravis and Small Bowel Intussusception for Jejuno-Ileal Anastomoses
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Pawan Kumar Jain, Poonam Kalra, Mamta Sharma, and Adhokshaj Joshi
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Myasthenia Gravis ,Intussusception ,Jejuno-Ileal Anastomoses ,Isoflurane ,Balance Anaesthesia ,Anesthesiology ,RD78.3-87.3 - Abstract
Myasthenia gravis is a chronic autoimmune disease affecting voluntary skeletal muscles. The altered sensitivity of acetylcholine receptors to muscle relaxants and concomitant treatment with anticholinesterase in these patients affect their anaesthetic management. Patients who have undergone bowel anastomosis and are on regular anticholinesterase treatment are susceptible to anastomotic leaks. We report successful anaesthetic management of class I myasthenic patient with coexisting small bowel intussusception operated for jejuno-ileal anastomoses using regional, inhalational and intravenous (i.v) anaesthesia based on train of four responses, and avoiding the use of reversal (anticholinesterase).
- Published
- 2016
47. Birth prevalence of congenital heart disease: A cross-sectional observational study from North India
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Anita Saxena, Anurag Mehta, Mamta Sharma, Sudha Salhan, Mani Kalaivani, Sivasubramanian Ramakrishnan, and Rajnish Juneja
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Congenital heart disease ,echocardiography ,newborns ,prevalence ,Medicine ,Pediatrics ,RJ1-570 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Objective: To assess the birth prevalence and pattern of congenital heart disease (CHD) using echocardiography in babies born in a community hospital of North India. Methods: A cross-sectional observational study conducted over a period of 3 years. Newborns born over a specific 8-h period of the day were recruited in the study. They underwent routine clinical examination and pulse oximetry, followed by screening echocardiography for diagnosing a CHD. Results: A total of 20,307 newborns were screened, among which 874 had abnormal echocardiograms; 687 had insignificant CHDs, 164 had significant CHDs, and 24 had other abnormal cardiac findings. The birth prevalence of significant CHDs was 8.07 per 1000 live births; 131 newborns had an acyanotic CHD (79.9%) and 33 a cyanotic CHD (20.1%). Ventricular septal defect (VSD) was the most common acyanotic CHD, present in 116 newborns, giving a prevalence of 5.7/1000 live births. Among the cyanotic CHD, transposition of great arteries was most common (prevalence 0.34/1000 live births). Conclusion: The CHD birth prevalence in our study is similar to the reported worldwide birth prevalence. Acyanotic CHD (mostly VSD) is seen in about three-fourths of babies born with CHD. The more sinister cyanotic CHD is present in remaining 25%.
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- 2016
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48. Exploring Combined Effect of Abiotic (Soil Moisture) and Biotic (Sclerotium rolfsii Sacc.) Stress on Collar Rot Development in Chickpea
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Avijit Tarafdar, T. Swaroopa Rani, U. S. Sharath Chandran, Raju Ghosh, Devashish R. Chobe, and Mamta Sharma
- Subjects
chickpea ,collar rot ,gene expression ,Sclerotium rolfsii ,soil moisture ,Plant culture ,SB1-1110 - Abstract
Plants being sessile are under constant threat of multiple abiotic and biotic stresses within its natural habitat. A combined stress involving an abiotic and a biotic factor reportedly increases susceptibility of the plants to pathogens. The emerging threat, collar rot disease of chickpea (caused by Sclerotium rolfsii Sacc.) is reported to be influenced by soil moisture condition (SMC). Hence, we studied the influence of differential SMC viz. upper optimum (100%), optimum (80%), lower optimum (60%), and limiting (40%) soil moisture conditions on colonization and collar rot development over the course of infection in two chickpea cultivars, Annigeri (susceptible to collar rot) and ICCV 05530 (moderately resistant to collar rot). Disease incidence was found to be directly proportional to increase in soil moisture (R2 = 0.794). Maximum incidence was observed at 80% SMC, followed by 100 and 60% SMC. Expression of genes (qPCR analysis) associated with host cell wall binding (lectin) and degradation viz. endopolygalacturonase-2, endoglucosidase, and cellobiohydrolase during collar rot development in chickpea were relatively less at limiting soil moisture condition (40%) as compared to optimum soil moisture condition (80%). As compared to individual stress, the expression of defense response genes in chickpea seedlings were highly up-regulated in seedlings challenged with combined stress. Our qPCR results indicated that the expression of defense-related genes in chickpea during interaction with S. rolfsii at low SMC was primarily responsible for delayed disease reaction. Involvement of moisture and biotic stress-related genes in combined stress showed a tailored defense mechanism.
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- 2018
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49. Genome-Wide Identification, Characterization, and Expression Analysis of Small RNA Biogenesis Purveyors Reveal Their Role in Regulation of Biotic Stress Responses in Three Legume Crops
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Rajeev K. Varshney, Vanika Garg, Gaurav Agarwal, Lekha T. Pazhamala, Spurthi N. Nayak, Himabindu Kudapa, Aamir W. Khan, Dadakhalandar Doddamani, Mamta Sharma, and P. B. Kavi Kishor
- Subjects
AGO ,DCL ,RDR ,gene expression ,biotic stress ,Papillionidoids ,Plant culture ,SB1-1110 - Abstract
Biotic stress in legume crops is one of the major threats to crop yield and productivity. Being sessile organisms, plants have evolved a myriad of mechanisms to combat different stresses imposed on them. One such mechanism, deciphered in the last decade, is small RNA (sRNA) mediated defense in plants. Small RNAs (sRNAs) have emerged as one of the major players in gene expression regulation in plants during developmental stages and under stress conditions. They are known to act both at transcriptional and post-transcriptional levels. Dicer-like (DCL), Argonaute (AGO), and RNA dependent RNA polymerase (RDR) constitute the major components of sRNA biogenesis machinery and are known to play a significant role in combating biotic and abiotic stresses. This study is, therefore, focused on identification and characterization of sRNA biogenesis proteins in three important legume crops, namely chickpea, pigeonpea, and groundnut. Phylogenetic analysis of these proteins between legume species classified them into distinct clades and suggests the evolutionary conservation of these genes across the members of Papillionidoids subfamily. Variable expression of sRNA biogenesis genes in response to the biotic stresses among the three legumes indicate the possible existence of specialized regulatory mechanisms in different legumes. This is the first ever study to understand the role of sRNA biogenesis genes in response to pathogen attacks in the studied legumes.
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- 2017
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50. Influence of dietary supplementation of vitamin E in ameliorating adverse effects of ochratoxin on biochemical profile and immune response in broiler chickens
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MOHIT SINGH, RAM SINGH, A B MANDAL, and MAMTA SHARMA
- Subjects
Biochemical parameters ,Broiler ,Immune response ,Ochratoxin ,Vitamin E ,Animal culture ,SF1-1100 - Abstract
In the present study, the effect of supplementation of vitamin E in ochratoxin A (OTA) contaminated diet in ameliorating adverse effects of ochratoxin on biochemical parameters and immune response in broiler chickens was investigated. Day old broiler chicks (240) were divided into 6 treatment groups (T1- control (basal diet), T2 - T1 + 200 ppb OTA, T3 -T1 + 100 mg vit. E, T4 -T1 + 200 mg vit. E, T5 -T2 + 100 mg vit. E and T6 -T2 + 200 mg vit. E). Each diet was fed to 5 replicated groups of 8 birds each from 0 to 42 days of age. The blood samples were collected on 42 days of age of broilers. The total serum protein and haemoglobin (Hb) concentrations in T2 (200 ppb OTA) and T5 (200 ppb OTA + 100 mg vit. E) were lower (P
- Published
- 2016
- Full Text
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