Academic literature on the topic 'High level resistance to glycopeptides'

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Journal articles on the topic "High level resistance to glycopeptides"

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Johnson, A. P., A. H. Uttley, N. Woodford, and R. C. George. "Resistance to vancomycin and teicoplanin: an emerging clinical problem." Clinical Microbiology Reviews 3, no. 3 (1990): 280–91. http://dx.doi.org/10.1128/cmr.3.3.280.

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Vancomycin and teicoplanin are glycopeptides active against a wide range of gram-positive bacteria. For 30 years following the discovery of vancomycin in 1956, vancomycin resistance was not detected among normally susceptible bacteria recovered from human specimens. Since 1986, however, bacteria resistant to vancomycin or teicoplanin or both have been described. Strains of the genera Leuconostoc, Lactobacillus, Pediococcus, and Erysipelothrix seem inherently resistant to glycopeptides. Species and strains of enterococci and coagulase-negative staphylococci appear to have acquired or developed
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Périchon, Bruno, and Patrice Courvalin. "Heterologous Expression of the Enterococcal vanA Operon in Methicillin-Resistant Staphylococcus aureus." Antimicrobial Agents and Chemotherapy 48, no. 11 (2004): 4281–85. http://dx.doi.org/10.1128/aac.48.11.4281-4285.2004.

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ABSTRACT Two methicillin- and vancomycin-resistant Staphylococcus aureus strains, MI-VRSA and PA-VRSA, and Enterococcus faecalis DMC83006B, considered to be the potential donor of glycopeptide resistance to MI-VRSA, were studied. MI-VRSA is highly resistant to both glycopeptides, whereas PA-VRSA displays low-level resistance to vancomycin and reduced susceptibility to teicoplanin. We have analyzed the expression of the vanA operon in the three clinical isolates. Determination of the relative amounts of late peptidoglycan precursors and quantification of the d,d-peptidase activities, in the abs
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Cremniter, Julie, Jean-Luc Mainardi, Nathalie Josseaume, et al. "Novel Mechanism of Resistance to Glycopeptide Antibiotics in Enterococcus faecium." Journal of Biological Chemistry 281, no. 43 (2006): 32254–62. http://dx.doi.org/10.1074/jbc.m606920200.

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Glycopeptides and β-lactams are the major antibiotics available for the treatment of infections due to Gram-positive bacteria. Emergence of cross-resistance to these drugs by a single mechanism has been considered as unlikely because they inhibit peptidoglycan polymerization by different mechanisms. The glycopeptides bind to the peptidyl-d-Ala4-d-Ala5 extremity of peptidoglycan precursors and block by steric hindrance the essential glycosyltransferase and d,d-transpeptidase activities of the penicillin-binding proteins (PBPs). The β-lactams are structural analogues of d-Ala4-d-Ala5 and act as
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Klare, I., H. Heier, H. Claus, and W. Witte. "Environmental strains ofEnterococcus faeciumwith inducible high-level resistance to glycopeptides." FEMS Microbiology Letters 106, no. 1 (1993): 23–29. http://dx.doi.org/10.1111/j.1574-6968.1993.tb05930.x.

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Beltrametti, Fabrizio, Arianna Consolandi, Lucia Carrano, et al. "Resistance to Glycopeptide Antibiotics in the Teicoplanin Producer Is Mediated by van Gene Homologue Expression Directing the Synthesis of a Modified Cell Wall Peptidoglycan." Antimicrobial Agents and Chemotherapy 51, no. 4 (2007): 1135–41. http://dx.doi.org/10.1128/aac.01071-06.

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ABSTRACT Glycopeptide resistance has been studied in detail in enterococci and staphylococci. In these microorganisms, high-level resistance is achieved by replacing the C-terminal d-alanyl-d-alanine of the nascent peptidoglycan with d-alanyl-d-lactate or d-alanyl-d-serine, thus reducing the affinities of glycopeptides for cell wall targets. Reorganization of the cell wall is directed by the expression of the van gene clusters. The identification of van gene homologs in the genomes of several glycopeptide-producing actinomycetes suggests the involvement of a similar self-resistance mechanism t
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Marcone, Giorgia Letizia, Elisa Binda, Lucia Carrano, Mervyn Bibb, and Flavia Marinelli. "Relationship between Glycopeptide Production and Resistance in the Actinomycete Nonomuraea sp. ATCC 39727." Antimicrobial Agents and Chemotherapy 58, no. 9 (2014): 5191–201. http://dx.doi.org/10.1128/aac.02626-14.

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ABSTRACTGlycopeptides and β-lactams inhibit bacterial peptidoglycan synthesis in Gram-positive bacteria; resistance to these antibiotics is studied intensively in enterococci and staphylococci because of their relevance to infectious disease. Much less is known about antibiotic resistance in glycopeptide-producing actinomycetes that are likely to represent the evolutionary source of resistance determinants found in bacterial pathogens.Nonomuraeasp. ATCC 39727, the producer of A40926 (the precursor for the semisynthetic dalbavancin), does not harbor the canonicalvanHAXgenes. Consequently, we in
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Nicolau, D. P., M. N. Marangos, C. H. Nightingale, et al. "Efficacy of vancomycin and teicoplanin alone and in combination with streptomycin in experimental, low-level vancomycin-resistant, VanB-type Enterococcus faecalis endocarditis." Antimicrobial Agents and Chemotherapy 40, no. 1 (1996): 55–60. http://dx.doi.org/10.1128/aac.40.1.55.

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The efficacy of vancomycin (VM) and teicoplanin (TE), alone and in combination with streptomycin (SM), against enterococci that express low-level VanB-type VM resistance was investigated in experimental endocarditis using isogenic strains of Enterococcus faecalis susceptible to glycopeptides and aminoglycosides or inducibly resistant to low levels of VM (MIC = 16 micrograms/ml). VM was significantly less active against the resistant strain than against the susceptible strain, establishing that low-level VanB-type VM resistance can influence therapeutic efficacy. By contrast, TE had equally goo
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Dutka-Malen, S., B. Blaimont, G. Wauters, and P. Courvalin. "Emergence of high-level resistance to glycopeptides in Enterococcus gallinarum and Enterococcus casseliflavus." Antimicrobial Agents and Chemotherapy 38, no. 7 (1994): 1675–77. http://dx.doi.org/10.1128/aac.38.7.1675.

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Rosato, A., J. Pierre, D. Billot-Klein, A. Buu-Hoi, and L. Gutmann. "Inducible and constitutive expression of resistance to glycopeptides and vancomycin dependence in glycopeptide-resistant Enterococcus avium." Antimicrobial Agents and Chemotherapy 39, no. 4 (1995): 830–33. http://dx.doi.org/10.1128/aac.39.4.830.

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A clinical isolate of Enterococcus avium, Ea1, which exhibited inducible, low-level resistance to vancomycin and teicoplanin, and two mutants selected from this strain, Ea3 and Ea31, were studied. Ea3 was vancomycin dependent and derived from Ea1, while Ea31 was not vancomycin dependent, was constitutively resistant, and was derived from Ea3. Hybridization studies revealed that vanA was present in Ea1 and suggested that it was located on a high-molecular-weight plasmid. In the absence of induction, Ea1 synthesized only the natural UDP-MurNAc-pentapeptide precursor, and after induction it synth
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Hadeel, T. Al-Hadithi, and Rasheed Kithar. "Antibiotic Resistance Patterns of Enterococcus faecalis and E. faecium Isolated from Infected Wounds. Incidence of High –level Resistance to Vancomycin and Aminoglycosides." Pharmaceutical and Chemical Journal 5, no. 1 (2018): 49–56. https://doi.org/10.5281/zenodo.13891296.

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A total of fifty seven isolates of <em>Entercoccus faecalis</em> (N=42) and <em>E. faecium</em> (N=15) from infected wounds were screened for their resistance against 17 antibiotics including vancomycin. <em>E. faecalis</em> isolates demonstrated absolute resistance (100%) against eight antibiotics: chloramphenicol, nalidixic acid, gentamicin, streptomycin, tetracyclin, erythromycin, penicillin G and lincomycin. While isolates of <em>E. faecium</em> revealed absolute resistance (100%) to only three antibiotics: chloramphenicol, nalidixic acid, and lincomycin, yet they exhibited 80% resistance
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Dissertations / Theses on the topic "High level resistance to glycopeptides"

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Borowczak, Mike. "Side channel attack resistance| Migrating towards high level methods." Thesis, University of Cincinnati, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3601397.

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<p> Our world is moving towards ubiquitous networked computing with unstoppable momentum. With technology available at our every finger tip, we expect to connect quickly, cheaply, and securely on the sleekest devices. While the past four decades of design automation research has focused on making integrated circuits smaller, cheaper and quicker the past decade has drawn more attention towards security. Though security within the scope of computing is a large domain, the focus of this work is on the elimination of computationally based power byproducts from high-level device models down to phys
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Panchal, Viralkumar. "The molecular basis of high-level methicillin resistance in Staphylococcus aureus." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22036/.

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Martin, Deborah J. H. Martin. "Understanding microbial survival in, and the development of resistance to, high-level disinfection." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/55865/.

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High-level disinfection is employed throughout the health services in the disinfection of medical equipment, such as endoscopes, to prevent patient-to-patient infections. The likelihood of an endoscope transmitted infection occurring is rare, providing strict guidelines are followed for effective decontamination between procedures. Endoscopes are subjected to rigorous cleaning and high-level disinfection within washer-disinfectors. However, poor decontamination protocols and inappropriate use of disinfectants can lead to can lead to incomplete disinfection and resistance. A number of bacterial
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Barnard, Danielle. "Conjugative Transfer Pathways of High-Level Mupirocin Resistance and Conjugative Transfer Genes in Staphylococcus." Digital Commons @ East Tennessee State University, 2006. https://dc.etsu.edu/etd/2188.

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To combat widespread infections caused by Staphylococcus aureus, mupirocin was introduced at the Veterans Affairs Medical Center, Mountain Home, Tennessee. Soon after introduction, high-level mupirocin-resistance emerged. The rapid emergence was hypothesized to be due to conjugative transfer of the mupA resistance gene from S. epidermidis to S. aureus. Results have shown that transfer of high-level mupirocin-resistance from S. aureus donors commonly occurs. However, transfer from naturally-occurring S. epidermidis donors was not attainable. Staphylococcus epidermidis transconjugants, how
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Breece, Robert M. "Spectroscopic Characterization of Co(II)-Substituted VanX, a Zn(II)-Dependent Dipeptidase Required for High-Level Vancomycin Resistance." Miami University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=miami1077576564.

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Saeedi, Baharak. "Characterization of clinical enterococcal isolates in Swedish hospitals : studies on genetic relatedness and high-level gentamicin resistance /." Linköping : Dept. of Molecular and Clinical Medicine, Univ, 2005. http://www.bibl.liu.se/liupubl/disp/disp2005/med899s.pdf.

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Pirapatrungsuriya, Komson. "Fluoroquinolone action and resistance : action of ciprofloxacin in a standard Escherichia coli and the roles of GyrA and ParC mutations in high-level resistance." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/22559.

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Bacterial isolates from Malaysia and Thailand were obtained, characterised and tested for their MIC of ciprofloxacin (Cip). Some were found to be extremely resistant including three <I>Acinetobacter baumannii</I> (MIC of 128 mg/L). <I>GyrA </I>and <I>parC</I> are homologous genes and are subunits of enzyme DNA gyrase and topoisomerase IV, respectively. Three <I>E. coli</I> (MIC of 128 mg/L) had two mutations in <I>GyrA</I> (Ser-83 to Leu and Asp-87 to Tyr) and one mutation in <I>parC</I> (Ser-83 to lle). Another <I>E. coli</I> (MIC of 32 mg/L) had the same three mutations except at <I>gyrA</I>
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Dhakal, Shankar. "Circuit Level Reliability Considerations in Wide Bandgap Semiconductor Devices." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1532703747534188.

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Delgado, Marlene Patrícia Pereira Ferreira. "Detecção de alto nível de resistência a aminoglicosídeos em estirpes clínicas de enterococci." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2015. http://hdl.handle.net/10400.5/9144.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Os Enterococcus emergiram como agentes patogénicos nosocomiais importantes, com o aparecimento cada vez mais frequente de estirpes multi-resistentes. São intrinsecamente resistentes a várias classes de antibióticos, por exemplo as cefalosporinas, baixas concentrações de aminoglicosídeos, lincosamidas e estreptograminas (Enterococcus faecalis). Adicionalmente, apresentam capacidade de adquirir resistência a outros antibióticos, sendo cada vez mais frequente a ocorrência de resistência à penicilina, cloranfenicol, macrólidos, tetracicl
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Sasikumar, Anup. "Quantitative spectroscopy of reliability limiting traps in operational gallium nitride based transistors using thermal and optical methods." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1415298691.

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Books on the topic "High level resistance to glycopeptides"

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Simjee, Shabbir Ahmed Salim. Molecular characterisation of mobile high-level gentamicin resistance determinants in enterococci. University of Birmingham, 1998.

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Barrington, Frank. Conjugative transfer of high-level gentamicin resistance in clinical and community isolates of enterococci. The Author], 1993.

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Günther, Hans-Peter, ed. Use and Application of High-Performance Steels for Steel Structures. International Association for Bridge and Structural Engineering (IABSE), 2005. http://dx.doi.org/10.2749/sed008.

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&lt;p&gt;New steel production processes have led to a remarkable improve­ment in steel products within the last few years, and now allows steels to be produced according to the desired mechanical and chemical properties. High-Performance Steel (HPS) is the designa­tion given to this new generation of steels that offer higher performance not only in terms of strength but also toughness, weld­ability, cold formability and corrosion resistance, compared to the traditionally used mild steel grades.&lt;/p&gt; &lt;p&gt;The development of HPS goes with today's increased demand for slender lightweight
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Nuclear Decolonization: Indigenous Resistance to High-Level Nuclear Waste Siting. Ohio State University Press, 2023.

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Nuclear Decolonization: Indigenous Resistance to High-Level Nuclear Waste Siting. Ohio State University Press, 2023.

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Brandt, Jeffrey J. The structural and kinetic characterization of VanX: A metalloenzyme conferring high-level vancomycin resistance. 2000.

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Thorne, Sara, and Paul Clift, eds. The Eisenmenger syndrome. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199228188.003.0016.

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Introduction 114Natural history 114Complications and extra-cardiac manifestations 114Physical signs 114Investigations 116Management 116Large communication between the systemic and pulmonary circulations at atrial, ventricular, or arterial level: → high pulmonary blood flow (L-to-R shunt);→ development of high pulmonary vascular resistance;...
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Pinckney, Jonathan C. From Dissent to Democracy. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190097301.001.0001.

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Under what conditions will successful nonviolent revolutions lead to democratization? While the scholarly literature has shown that nonviolent resistance has a positive effect on a country’s level of democracy, little research to date has disaggregated this population to explain which cases of successful nonviolent resistance lead to democracy and which do not. This book presents a theory of democratization in transitions initiated by nonviolent resistance based on the successful resolution of two central strategic challenges: maintaining high transitional mobilization and avoiding institution
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Mendelson, Marc. Antimicrobial stewardship in a resource-poor setting. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198758792.003.0018.

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Low- and middle-income countries (LMICs) face a high burden of infection and, commonly, colliding epidemics of HIV, malaria, tuberculosis, and other bacterial diseases. The resulting high usage of antimicrobials, inappropriate prescribing, and use of falsified or counterfeit medicines drives antimicrobial resistance. Stewardship programmes need to be developed within the social and cultural norms of the country, and take cognizance of competing health needs, which may prove important barriers. A situational analysis of the country’s resources and challenges with respect to antimicrobial resist
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Reuter, Ben, ed. Developing Endurance. Human Kinetics, 2012. http://dx.doi.org/10.5040/9781718225121.

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Runners, cyclists, swimmers, rowers, triathletes, and ultradistance athletes must sustain performance at a high level to come out on top. Developing Endurance shows how to achieve optimal stamina to race your best through science-based aerobic, anaerobic, and resistance training. Written by 11 top experts in the National Strength and Conditioning Association, the top sport conditioning organization in the world, this guide provides both the background information and the exercises, drills, workouts, and programs for ultimate results. Athletes and coaches will appreciate the assessment tools, a
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Book chapters on the topic "High level resistance to glycopeptides"

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Desai, Monica, Helen Fifer, and Gwenda Hughes. "Neisseria Gonorrhoeae With High-Level Resistance to Azithromycin." In Case Studies in Infection Control. Garland Science, 2018. http://dx.doi.org/10.1201/9780203733318-16.

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Knapp, J. S., J. M. Zenilman, M. C. Roberts, et al. "High-level tetracycline resistance associated with tetM in Neisseria meningitidis and other Neisseriaceae." In Gonococci and Meningococci. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1383-7_23.

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Straut, Monica, Gilda de Cespédès, Françoise Delbos, and Thea Horaud. "Genetic and Molecular Characterization of High-Level Gentamicin Resistance in Enterococcus faecalis Strains Isolated in Romania." In Streptococci and the Host. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-1825-3_114.

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Marrero, Jeannette, Georg Auling, Orquidea Coto, and Dietrich Nies. "High-Level Resistance to Cobalt and Nickel in Cuban Serratia marcescens Strains Isolated from Serpentine Deposits." In Advanced Materials Research. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-452-9.521.

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Kulyk, V. V., Bogdan Vasyliv, Z. A. Duriagina, et al. "Estimation of the Role of Nanosized Stabilizing Powders in Gaining High-Level Crack Growth Resistance of Partially Stabilized Zirconia." In Springer Proceedings in Physics. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18096-5_18.

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Shi, Yan, Yupu Wang, Jiazheng Li, and Wenguang Jiang. "Study on the Durability of Hydraulic Engineered Cementitious Composites." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-6238-5_12.

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AbstractTo explore the durability of hydraulic engineered cementitious composites (HECC), this article uses hydraulic concrete permeability and frost resistance tests, evaluates them in combination with mechanical tests in high-temperature resistance and self-healing tests, and explores the influence of different maximum particle sizes of sand on permeability and frost resistance. In high-temperature resistance, the thermal stability of fibers and the influence of different curing temperatures on mechanical properties are explored, and the effects of different maximum particle sizes of sand, d
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Knapp, J. S., J. M. Zenilman, J. W. Biddle, et al. "Distribution and frequency of strains of Neisseria gonorrhoeae with plasmid-mediated, high-level resistance to tetracycline (TRNG) in the United States." In Gonococci and Meningococci. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1383-7_21.

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Running, Katherine L. D., and Justin D. Faris. "Rapid Cloning of Disease Resistance Genes in Wheat." In Compendium of Plant Genomes. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38294-9_10.

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AbstractWheat is challenged by rapidly evolving pathogen populations, resulting in yield losses. Plants use innate immune systems involving the recognition of pathogen effectors and subsequent activation of defense responses to respond to pathogen infections. Understanding the genes, genetic networks, and mechanisms governing plant-pathogen interactions is key to the development of varieties with robust resistance whether through conventional breeding techniques coupled with marker selection, gene editing, or other novel strategies. With regards to plant-pathogen interactions, the most useful
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Gelen Kaya, Pinar. "Nutrition in Women with Polycystic Ovary Syndrome (PCOS)." In Obstetrics & Gynecology and Nutrition. Nobel Tip Kitabevleri, 2024. http://dx.doi.org/10.69860/nobel.9786053359494.4.

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In women with polycystic ovary syndrome, not every hormone necessary for the full maturation of an egg can be produced. Since none of the eggs can mature and crack from the ovary, ovulation cannot occur and the hormone progesterone cannot be produced. This situation causes the menstruations to be irregular or not at all. The insulin hormone is a hormone produced by the pancreas that regulates the level of glucose in the blood. ""Insulin resistance"" is observed in many women with polycystic ovary syndrome. In insulin resistance; body tissues resist the action of insulin and as a result, the bo
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Nguyen, Binh, Greg J. Fox, Paul H. Mason, and Justin T. Denholm. "Preventive Therapy for Multidrug Resistant Latent Tuberculosis Infection: An Ethical Imperative with Ethical Barriers to Implementation?" In Ethics and Drug Resistance: Collective Responsibility for Global Public Health. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-27874-8_2.

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Abstract Multidrug resistant tuberculosis (MDR-TB) has a substantial impact on individuals and communities globally, including lengthy, expensive and burdensome therapy with high rates of treatment failure and death. Strategies to prevent disease are well established for those who acquire latent tuberculosis infection (LTBI) after exposure to drug susceptible TB (DS-TB). However, there has been limited research or programmatic experience regarding the prevention of MDR-TB. Accordingly, while global recommendations strongly emphasize the need to deliver LTBI therapy after TB exposure, most prog
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Conference papers on the topic "High level resistance to glycopeptides"

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Bhavsar, Rashmi B., Luca Foroni, and Carlo Malara. "Corrosion Resistance of UNS N09935 in High Pressure High Temperature Sour Environments." In CORROSION 2011. NACE International, 2011. https://doi.org/10.5006/c2011-11113.

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Abstract The UNS N09935 alloy with a minimum yield strength of 760 MPa (110 ksi) was successfully balloted in NACE MR0175/ISO 15156-3: 2003 based on SCC test results in a test environment much more severe than NACE Test Level V and on GHSC test results in NACE Test Level III. These results indicated the suitability of this material for sour service applications. Further to these findings, an R&amp;D test programme has been implemented to investigate the corrosion resistance of UNS N09935 in more severe conditions, beyond 200 °C. Properties of this material and results of this test programme ar
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Anantatmula, R. P., and J. R. Divine. "Corrosion Monitoring of High-Level Waste Tanks." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94141.

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Abstract High-level nuclear wastes are currently being stored in carbon steel tanks at the Hanford Site. The wastes are stored in both single-shell tanks (SSTs) and double-shell tanks (DSTs). The SSTs have already exceeded their design life and some of these tanks have already leaked waste into the surrounding soil. The DSTs, on the other hand, were fabricated and put into operation more recently and have not been observed to show any leakage of wastes. One of the objectives at the Hanford Site is to monitor the degradation of the DSTs with the aid of intank corrosion probes. Outside the nucle
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Gdowski, G. E., and R. D. McCright. "Corrosion Considerations of High-Nickel Alloys and Titanium Alloys for High-Level Radioactive Waste Disposal Containers*." In CORROSION 1991. NACE International, 1991. https://doi.org/10.5006/c1991-91048.

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Abstract Corrosion resistant materials are being considered for the metallic barrier of the Yucca Mountain Project's high-level radioactive waste disposal containers. Nickel-chromium-molybdenum alloys and titanium alloys have good corrosion resistance properties and are considered good candidates for the metallic barrier. The localized corrosion phenomena, pitting and crevice corrosion, are considered as potentially limiting for the barrier lifetime. An understanding of the mechanisms of localized corrosion and of how various parameters affect it will be necessary for adequate performance asse
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Chandler, G. T., P. E. Zapp, and J. I. Mickalonis. "Hot-Wall Corrosion Testing of Simulated High Level Nuclear Waste." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95431.

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Abstract Three materials of construction for steam tubes used in the evaporation of high level radioactive waste were tested under heat flux conditions, referred to as hot-wall tests. The materials were type 304L stainless steel, alloy C276, and alloy G3. Non-radioactive acidic and alkaline salt solutions containing halides and mercury simulated different high level waste solutions stored or processed at the United States Department of Energy’s Savannah River Site. Alloy C276 was also tested for localized corrosion susceptibility under steady-state conditions. The nickel-based alloys C276 and
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Ilevbare, G. O., T. Lian, and J. C. Farmer. "Environmental Considerations in the Studies of Corrosion Resistant Alloys for High-Level Radioactive Waste Containment." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02539.

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Abstract The corrosion resistance of Alloy 22 (UNS No.: N06022) was studied in simulated ground water of different pH values and ionic contents at various temperatures, potentiodynamic polarization techniques were used to study the electrochemical behavior and measure the critical potentials in the various systems. Alloy 22 was found to be resistant to localized corrosion in the simulated ground waters tested.
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Shukla, Ram K., Allan John Perkins, P. M. Bourgeois, R. J. Jaramins, W. G. Secen, and D. J. Stroud. "Corrosion Monitoring of High-Level Waste Storage Tank 8-D2 at the West Valley Demonstration Project." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94121.

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Abstract From 1966 to 1972, nearly 600,000 gallons of highly radioactive liquid waste were generated at the site of the only commercial nuclear fuel reprocessing facility to have operated in the United States, located in West Valley, New York. This waste has been held in underground storage tanks since reprocessing operations ceased in 1972. Premature failure of tank walls represents a significant safety risk at West Valley. For this reason, application of conventional methods of probe insertion and data acquisition are impractical. Because a satisfactory corrosion monitoring system must allow
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Ananthachar, Sudhir, and Michael Cook. "Epoxy Curing Agents for High Temperature-high Pressure Chemical Resistant Coatings." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-18028.

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Abstract Epoxy coatings can be found in a broad range of industries and applications due to their exceptional performance such as corrosion and chemical resistance, mechanical properties, and adhesion to wide range of substrates. Within the protective coating market, epoxy systems have been used for many years as linings inside of chemical storage tanks, vessels and pipelines due to their good thermal and chemical resistance properties. In the petrochemicals industry, high-solid epoxy coatings are also used for lining rail cars that transport crude oil. Specific to the petrochemical industry w
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Kremel, Sabine, Greg Chitwood, Martin Wöls, and Luciana Intiso. "High Strength N07718 with Improved Resistance to Cracking in H2S-Containing Environments." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11478.

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Abstract This paper describes the development of an alternative heat treatment designed to increase the strength of 718 (UNS N07718) above the current level, which is bound by the 40 HRC limit of NACE MR01751 and the heat treatment requirements of API 6ACRA.2 The investigation was triggered by hydrogen embrittlement failures reported for PH Ni-base alloys, where unfavorable microstructure was reported to be a contributing factor. Increased strength was also suspected, but this comes at a time when the industry needs to push strength higher to exploit future high-pressure/high-temperature (HP/H
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Goodwin, F. E., and R. E. Westerman. "A Survey of Natural Analogs for Lead Application in High-Level Waste Disposal." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93607.

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Abstract A proposed approach to a high-level nuclear waste package design uses redundant barriers, each capable of independently containing the waste for the prescribed time period. The external container would be a highly corrosion resistant material, such as a Ni- or a Ti-base alloy; the inner barrier would consist of a poured-in (cast) or pressed-in (powder metallurgy product) lead-base filler material. Extensive laboratory tests, necessarily short-term by repository standards, have been performed that show that the rates of metal degradation under repository- simulating conditions are low
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Dunn, D. S., N. Sridhar, and G. A. Cragnolino. "Effects of Surface Chromium Depletion on the Localized Corrosion of Alloy 825 as a High-Level Waste Container Material." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94138.

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Abstract The effects of the chromium depleted mill finished surface on the localized corrosion resistance of alloy 825 were investigated. Tests conducted in solutions simulating the groundwater at Yucca Mountain with a higher concentration of chloride indicated that the breakdown and repassivation potentials for the mill finished surfaces were more active than those for polished surfaces. Potentiodynamic polarization tests indicated that pits can be initiated on the chromium depleted surface at potentials of 220 mVSCE in a solution containing 1,000 ppm chloride at 95°C. Potentiostatic tests id
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Reports on the topic "High level resistance to glycopeptides"

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Davis, Eric L., Yuji Oka, Amit Gal-On, Todd Wehner, and Aaron Zelcer. Broad-spectrum Resistance to Root-Knot Nematodes in Transgenic Cucurbits. United States Department of Agriculture, 2013. http://dx.doi.org/10.32747/2013.7593389.bard.

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Root-knot nematodes (RKN), Meloidogyne spp., are extremely destructive pathogens of cucurbit crops grown in the United States and Israel. The safety and environmental concerns of toxic nematicides, and limited sources of natural cucurbit resistance to the four major species of Meloidogyne that threaten these crops in Israel and the U.S., have emphasized the use of biotechnology to develop cucurbits with novel RKN resistance. The U.S. scientists have identified over 40 unique RKN parasitism genes that encode nematode secretions involved in successful plant root infection by RKN, and they have d
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Lapidot, Moshe, Linda Hanley-Bowdoin, Jane E. Polston, and Moshe Reuveni. Geminivirus-resistant Tomato Plants: Combining Transgenic and Conventional Strategies for Multi-viral Resistance. United States Department of Agriculture, 2010. http://dx.doi.org/10.32747/2010.7592639.bard.

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Begomoviruses, which constitute one genus of the Geminiviridae family, are single-stranded DNA viruses that infect many dicotyledonous crops important to large agricultural industries as well as to subsistence growers. Although all begomoviruses are transmitted by whiteflies (Bemisia tabaci), they have proven difficult to manage even with heavy insecticide applications. The begomovirus, Tomato yellow leaf curl virus (TYLCV), has been a problem in tomato production in Israel since the 1950s and in the United States since 1997. Approximately 89 begomoviruses have now been reported to infect toma
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Watad, Abed A., Paul Michael Hasegawa, Ray A. Bressan, Alexander Vainstein, and Yigal Elad. Osmotin and Osmotin-Like Proteins as a Novel Source for Phytopathogenic Fungal Resistance in Transgenic Carnation and Tomato Plants. United States Department of Agriculture, 2000. http://dx.doi.org/10.32747/2000.7573992.bard.

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The goal of this project is to enhance fungal resistance of carnation and tomato through the ectopic expression of osmotin and other pathogenesis-related (PR) proteins. The research objectives were to evaluate in vitro antifungal activity of osmotin and osmotin and other PR protein combinations against phytopathogens (including Fusarium oxysporum, Verticillium dahliae, Botrytus cinerea or Phytophthora infestans), develop protocols for efficient transformation of carnation and tomato, express PR proteins in transgenic carnation and tomato and evaluate fungal resistance of transgenic plants. Pro
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Martin, Noémie, and Pierre-Olivier Pineau. Choosing to Pay More for Electricity: an experiment on the level of residential consumer cooperation. CIRANO, 2022. http://dx.doi.org/10.54932/xdvi6385.

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Reducing energy consumption and carbon emissions are two cornerstones of the fight against climate change. Signaling negative externalities of individual consumption on the environment is at the heart of public policies, and usually materializes through an increase in the price of polluting good and services. However, social resistance typically arises when such policies are implemented. In this experiment, we are interested in testing the context in which individuals would be willing to pay more for electricity. We use the situation of Québec (Canada), where low-cost hydropower sold below mar
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Levin, Ilan, John W. Scott, Moshe Lapidot, and Moshe Reuveni. Fine mapping, functional analysis and pyramiding of genes controlling begomovirus resistance in tomato. United States Department of Agriculture, 2014. http://dx.doi.org/10.32747/2014.7594406.bard.

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Abstract. Tomato yellow leaf curl virus (TYLCV), a monopartitebegomovirus, is one of the most devastating viruses of cultivated tomatoes and poses increasing threat to tomato production worldwide. Because all accessions of the cultivated tomato are susceptible to these viruses, wild tomato species have become a valuable resource of resistance genes. QTL controlling resistance to TYLCV and other begomoviruses (Ty loci) were introgressed from several wild tomato species and mapped to the tomato genome. Additionally, a non-isogenic F₁diallel study demonstrated that several of these resistance sou
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Gal-On, Amit, Shou-Wei Ding, Victor P. Gaba, and Harry S. Paris. role of RNA-dependent RNA polymerase 1 in plant virus defense. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7597919.bard.

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Objectives: Our BARD proposal on the impact of RNA-dependent RNA polymerase 1 (RDR1) in plant defense against viruses was divided into four original objectives. 1. To examine whether a high level of dsRNA expression can stimulate RDR1 transcription independent of salicylic acid (SA) concentration. 2. To determine whether the high or low level of RDR1 transcript accumulation observed in virus resistant and susceptible cultivars is associated with viral resistance and susceptibility. 3. To define the biogenesis and function of RDR1-dependent endogenous siRNAs. 4. To understand why Cucumber mosai
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Andrews. L51847 Fatigue Strength of Seamless Line Pipe and Modern ERW Line Pipe. Pipeline Research Council International, Inc. (PRCI), 2001. http://dx.doi.org/10.55274/r0010430.

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To resolve the question as to whether or not ERW pipe might prove inferior to seamless pipe in terms of resistance to cyclic stresses, the PRCI member companies decided to fund the project described herein to assess the performance of ERW pipe versus seamless pipe. Presented herein are the results of a research project on the serviceability of seamless line pipe and modern high-frequency-welded ERW (electric-resistance-welded) line pipe. Full-scale samples of both kinds of pipe were subjected in a laboratory environment to pressure cycles simulating hundreds of years of service. Four samples o
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Fahima, Tzion, and Jorge Dubcovsky. Map-based cloning of the novel stripe rust resistance gene YrG303 and its use to engineer 1B chromosome with multiple beneficial traits. United States Department of Agriculture, 2013. http://dx.doi.org/10.32747/2013.7598147.bard.

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Research problem: Bread wheat (Triticumaestivum) provides approximately 20% of the calories and proteins consumed by humankind. As the world population continues to increase, it is necessary to improve wheat yields, increase grain quality, and minimize the losses produced by biotic and abiotic stresses. Stripe rust, caused by Pucciniastriiformisf. sp. tritici(Pst), is one of the most destructive diseases of wheat. The new pathogen races are more virulent and aggressive than previous ones and have produced large economic losses. A rich source for stripe-rust resistance genes (Yr) was found in w
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Burbano Figueroa, Oscar, Milena Moreno Moran, Lorena Osorio Almanza, et al. Identification of resistance to ramulosis caused by Colletotrichum gossypii var. cephalosporioides in cotton advanced breeding lines and monitoring of ramulosis disease by RGB-image analysis. Corporación Colombiana de Investigación Agropecuaria - AGROSAVIA, 2016. http://dx.doi.org/10.21930/agrosavia.informe.2016.2.

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Identification of resistance to ramulosis caused by Colletotrichum gossypii var. cephalosporioides in cotton advanced breeding lines and monitoring of ramulosis disease by RGB-image analysis Abstract Cotton growing regions in South America are affected by Colletotrichum gossypii var. cephalosporioides (Cgc). The most severe epidemics provokes considerable yield reductions linked to meristem necrosis, oversprouting, excessive branching and stunting (Figure 1). The Sinu Valley is a major cotton producer in Colombia and is heavily affected by this disease. Rainfall was identified as the main driv
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Cahaner, Avigdor, Susan J. Lamont, E. Dan Heller, and Jossi Hillel. Molecular Genetic Dissection of Complex Immunocompetence Traits in Broilers. United States Department of Agriculture, 2003. http://dx.doi.org/10.32747/2003.7586461.bard.

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Objectives: (1) Evaluate Immunocompetence-OTL-containing Chromosomal Regions (ICRs), marked by microsatellites or candidate genes, for magnitude of direct effect and for contribution to relationships among multiple immunocompetence, disease-resistance, and growth traits, in order to estimate epistatic and pleiotropic effects and to predict the potential breeding applications of such markers. (2) Evaluate the interaction of the ICRs with genetic backgrounds from multiple sources and of multiple levels of genetic variation, in order to predict the general applicability of molecular genetic marke
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