33 research outputs found

    Effects of biofertilizer containing N-fixer, P and K solubilizers and AM fungi on maize growth: A greenhouse trial.

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    An in vitro study was undertaken to evaluate the compatibility of indigenous plant growth promoting rhizobacteria (PGPR) with commonly used inorganic and organic sources of fertilizers in tea plantations. The nitrogenous, phosphatic and potash fertilizers used for this study were urea, rock phosphate and muriate of potash, respectively. The organic sources of fertilizers neem cake, composted coir pith and vermicompost were also used. PGPRs such as nitrogen fixer; Azospirillum lipoferum, Phosphate Solubilizing Bacteria (PSB); Pseudomonas putida, Potassium Solubilizing Bacteria (KSB); Burkholderia cepacia and Pseudomonas putida were used for compatibility study. Results were indicated that PGPRs preferred the coir pith and they proved their higher colony establishment in the formulation except Azospirillum spp. that preferred vermicompost for their establishment. The optimum dose of neem cake powder

    Same data, different conclusions: Radical dispersion in empirical results when independent analysts operationalize and test the same hypothesis

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    In this crowdsourced initiative, independent analysts used the same dataset to test two hypotheses regarding the effects of scientists’ gender and professional status on verbosity during group meetings. Not only the analytic approach but also the operationalizations of key variables were left unconstrained and up to individual analysts. For instance, analysts could choose to operationalize status as job title, institutional ranking, citation counts, or some combination. To maximize transparency regarding the process by which analytic choices are made, the analysts used a platform we developed called DataExplained to justify both preferred and rejected analytic paths in real time. Analyses lacking sufficient detail, reproducible code, or with statistical errors were excluded, resulting in 29 analyses in the final sample. Researchers reported radically different analyses and dispersed empirical outcomes, in a number of cases obtaining significant effects in opposite directions for the same research question. A Boba multiverse analysis demonstrates that decisions about how to operationalize variables explain variability in outcomes above and beyond statistical choices (e.g., covariates). Subjective researcher decisions play a critical role in driving the reported empirical results, underscoring the need for open data, systematic robustness checks, and transparency regarding both analytic paths taken and not taken. Implications for organizations and leaders, whose decision making relies in part on scientific findings, consulting reports, and internal analyses by data scientists, are discussed

    Large-scale profiling of noncoding RNA function in yeast

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    Noncoding RNAs (ncRNAs) are emerging as key regulators of cellular function. We have exploited the recently developed barcoded ncRNA gene deletion strain collections in the yeast Saccharomyces cerevisiae to investigate the numerous ncRNAs in yeast with no known function. The ncRNA deletion collection contains deletions of tRNAs, snoRNAs, snRNAs, stable unannotated transcripts (SUTs), cryptic unstable transcripts (CUTs) and other annotated ncRNAs encompassing 532 different individual ncRNA deletions. We have profiled the fitness of the diploid heterozygous ncRNA deletion strain collection in six conditions using batch and continuous liquid culture, as well as the haploid ncRNA deletion strain collections arrayed individually onto solid rich media. These analyses revealed many novel environmental-specific haplo-insufficient and haplo-proficient phenotypes providing key information on the importance of each specific ncRNA in every condition. Co-fitness analysis using fitness data from the heterozygous ncRNA deletion strain collection identified two ncRNA groups required for growth during heat stress and nutrient deprivation. The extensive fitness data for each ncRNA deletion strain has been compiled into an easy to navigate database called Yeast ncRNA Analysis (YNCA). By expanding the original ncRNA deletion strain collection we identified four novel essential ncRNAs; SUT527, SUT075, SUT367 and SUT259/691. We defined the effects of each new essential ncRNA on adjacent gene expression in the heterozygote background identifying both repression and induction of nearby genes. Additionally, we discovered a function for SUT527 in the expression, 3’ end formation and localization of SEC4, an essential protein coding mRNA. Finally, using plasmid complementation we rescued the SUT075 lethal phenotype revealing that this ncRNA acts in trans. Overall, our findings provide important new insights into the function of ncRNAs

    A community participatory model of mobile dental service-survey among stakeholders

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    Background: The mobile dental service (MDS) at Ludhiana is a unique model of oral health care delivery which enables rural communities to develop their own creative system through partnerships, for ensuring consistent oral health care delivery in the underserved areas. Objectives: The objective of this study was to assess the satisfaction among the stakeholders participating in the MDS program of a premier Dental College in Ludhiana. Methodology: A cross-sectional survey was conducted in 12 villages of Ludhiana district in Punjab where the MDSs were being provided. Four hundred and fifty patients, 50 organizers and 40 service providers were interviewed separately with pretested questionnaires. Results: About 98.4% of the patients were completely satisfied with the overall care provided. 71.1% of the patients felt there was increased times in services and 76.7% felt that there was inadequate referral network. Most patients were satisfied with the communication skills of the doctors. 57.5% of the organizers felt that the overall care provided in the MDSs was consistently good and high quality in spite of challenging infrastructure. 100% of the health care providers felt that working in the MDS was a good learning experience in spite of the heavy workload and infrastructure challenges. Conclusion: The study reveals that the MDS is a satisfactory mode of dental care delivery for all the stakeholders involved. Despite the challenges, this partnership program can be nurtured as a successful model of oral health care delivery in underserved areas

    Table S2 from Rapid functional and evolutionary changes follow gene duplication in yeast

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    Duplication of genes or genomes provides the raw material for evolutionary innovation. After duplication a gene may be lost, recombine with another gene, have its function modified, or be retained in an unaltered state. The fate of duplication is usually studied by comparing extant genomes and reconstructing the most likely ancestral states. Valuable as this approach is, it may miss the most rapid evolutionary events. Here, we engineered strains of <i>Saccharomyces cerevisiae</i> carrying tandem and non-tandem duplications of the singleton gene <i>IFA38</i> to monitor (i) the fate of the duplicates in different conditions, including timescale and asymmetry of gene loss and (ii) the changes in fitness and transcriptome of the strains immediately after duplication and after experimental evolution. We found that the duplication brings widespread transcriptional changes but a fitness advantage is only present in fermentable media. In respiratory conditions, the yeast strains consistently lose the non-tandem <i>IFA38</i> gene copy in a surprisingly short time, within only few generations. This gene loss appears to be asymmetric and dependent on genome location since the original <i>IFA38</i> copy and the tandem duplicate are retained. Overall, this work shows for the first time that gene loss can be extremely rapid and context dependent

    Supplementary Figures and tables Legends from Rapid functional and evolutionary changes follow gene duplication in yeast

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    Duplication of genes or genomes provides the raw material for evolutionary innovation. After duplication a gene may be lost, recombine with another gene, have its function modified, or be retained in an unaltered state. The fate of duplication is usually studied by comparing extant genomes and reconstructing the most likely ancestral states. Valuable as this approach is, it may miss the most rapid evolutionary events. Here, we engineered strains of <i>Saccharomyces cerevisiae</i> carrying tandem and non-tandem duplications of the singleton gene <i>IFA38</i> to monitor (i) the fate of the duplicates in different conditions, including timescale and asymmetry of gene loss and (ii) the changes in fitness and transcriptome of the strains immediately after duplication and after experimental evolution. We found that the duplication brings widespread transcriptional changes but a fitness advantage is only present in fermentable media. In respiratory conditions, the yeast strains consistently lose the non-tandem <i>IFA38</i> gene copy in a surprisingly short time, within only few generations. This gene loss appears to be asymmetric and dependent on genome location since the original <i>IFA38</i> copy and the tandem duplicate are retained. Overall, this work shows for the first time that gene loss can be extremely rapid and context dependent

    Bioprospecting for brewers: Exploiting natural diversity for naturally diverse beers

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    The burgeoning interest in archaic, traditional, and novel beer styles has coincided with a growing appreciation of the role of yeasts in determining beer character as well as a better understanding of the ecology and biogeography of yeasts. Multiple studies in recent years have highlighted the potential of wild Saccharomyces and non‐Saccharomyces yeasts for production of beers with novel flavour profiles and other desirable properties. Yeasts isolated from spontaneously fermented beers as well as from other food systems (wine, bread, and kombucha) have shown promise for brewing application, and there is evidence that such cross‐system transfers have occurred naturally in the past. We review here the available literature pertaining to the use of nonconventional yeasts in brewing, with a focus on the origins of these yeasts, including methods of isolation. Practical aspects of utilizing nondomesticated yeasts are discussed, and modern methods to facilitate discovery of yeasts with brewing potential are highlighted.N. Grijalva Vallejos acknowledges the “Secretaría de Educación Superior, Ciencia, Tecnología e Innovación” (SENESCYT) of Ecuador, for the predoctoral grant awarded. The Academy of Finland (Academy Projects 276480 and 305453) is gratefully acknowledged for supporting the work of B. Gibson. J. Nikulin is supported by Fonds Baillet Latour. K. Krogerus wishes to thank the Alfred Kordelin Foundation, Svenska Kulturfonden—The Swedish Cultural Foundation in Finland, and Suomen Kulttuurirahasto for their support.Peer reviewe
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