Relevant bibliographies by topics / RHA

Academic literature on the topic 'RHA'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 September 2023

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Journal articles on the topic "RHA"

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Senthilan, Pingkalai R., and Charlotte Helfrich-Förster. "Rhodopsin 7–The unusual Rhodopsin inDrosophila." PeerJ 4 (September 6, 2016): e2427. http://dx.doi.org/10.7717/peerj.2427.

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Rhodopsins are the major photopigments in the fruit flyDrosophila melanogaster. Drosophilaexpress six well-characterized Rhodopsins (Rh1–Rh6) with distinct absorption maxima and expression pattern. In 2000, when theDrosophilagenome was published, a novelRhodopsingene was discovered:Rhodopsin 7(Rh7).Rh7is highly conserved among theDrosophilagenus and is also found in other arthropods. Phylogenetic trees based on protein sequences suggest that the sevenDrosophilaRhodopsins cluster in three different groups. While Rh1, Rh2 and Rh6 form a “vertebrate-melanopsin-type”–cluster, and Rh3, Rh4 and Rh5 form an “insect-type”-Rhodopsin cluster, Rh7 seem to form its own cluster. Although Rh7 has nearly all important features of a functional Rhodopsin, it differs from other Rhodopsins in its genomic and structural properties, suggesting it might have an overall different role than other known Rhodopsins.
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Nguyen, Duong. "EFFECT OF DIFFERENT TYPES OF RICE HUSK ASH ON SOME GEOTECHNICAL PROPERTIES OF CEMENT-ADMIXED SOIL." Iraqi Geological Journal 53, no. 2C (September 30, 2020): 1–12. http://dx.doi.org/10.46717/igj.53.2c.1rs-2020-09-01.

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Rice husk ash (RHA) is an agricultural residue and has shown great potential for soil stabilization. However, the research on the utilization of RHA for soft soil improvement using cement deep mixing method is still limited and the efficiency of using different RHA types for soil improvement needs to be clarified. In this study, the effect of different RHA types on Atterberg limits, unconfined compressive strength (UCS), and elastic modulus (E50) of soil-cement mixtures will be investigated. Two types of RHA which obtained from open fire burning (RHA1) and burning in a furnace under controlled conditions of temperature and duration of burning (RHA2), were used for this study. The RHA contents from 0 to 15% and 10% cement of the dry weight of the soil were used to treat the soft soil. The research results show that the types of RHA insignificantly affect the change in Atterberg limits of cement-admixed soil. Regarding the soil strength, the RHA2 shows a higher efficiency in the enhancement of treated soil strength at 28 days of curing than the RHA1. The addition of 12% RHA2 to the cement-admixed soil can increase the UCS and E50 values of treated soil by more than 50%.
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CECCONELLO, V., B. R. C.SARTORI, M. P. .KULAKOWSKI, C. S. KAZMIERCZAK, and M. MANCIO. "Shrinkage and porosity in concretes produced with recycled concrete aggregate and rice husk ash." Revista IBRACON de Estruturas e Materiais 12, no. 3 (June 2019): 694–704. http://dx.doi.org/10.1590/s1983-41952019000300013.

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Abstract The admixture of recycled concrete aggregates (RCA) in new concretes is an interesting alternative in the efforts to mitigate environmental impacts. RCA may increase porosity and change properties of concretes. Rice husk ash (RHA) is employed as supplementary cementitious material may improve concrete properties. The present study investigated the shrinkage of concrete prepared with RCA and RHA, proposing a mathematical model to explain the phenomenon. Concretes were produced with 25% and 50% of coarse recycled aggregate as replacement of natural aggregate, 0%, 10%, and 20% of RHA as replacement of cement, and a water-to-binder ratio of 0.64. Water absorption and capillary and total porosities were analyzed on day 28. Shrinkage tests were conducted on days 1, 4, 7, 14, 28, 63, 91, and 112. The results point to a significant interaction between RHA and RCA.
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Chakraborty, Satarupa, and Nirbhay Thakur. "Strength assessment of concrete using rice husk ash, recycled concrete aggregate and polyvinyl alcohol fiber." IOP Conference Series: Earth and Environmental Science 889, no. 1 (November 1, 2021): 012020. http://dx.doi.org/10.1088/1755-1315/889/1/012020.

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Abstract : This research work present the finest proper mix by adding and replacing with some other admixture materials having same properties as standard concrete materials. The substances that are used in this Rice husk ash (RHA) Recycled concrete aggregates (RCA) and polyvinyl alcohol fiber (PVA). Coarse aggregates was replaced with RCA at 50% and 0-20% RHA in scheming concrete mixes. For this, 5 to 20% (such as 5%, 10%, 15% and 20%) of RHA has been used as a fractional replacement of cement. PVA fiber has been added to this mix at fixed percentage of 0.50% by weight of concrete. 6 mm geometric length of PVA fiber which were aspect with ratio of 428 were used in this research work. In the present research work I did non-destructive and destructive tests after 7 days and 28 days. The values of tests were 10% for RHA and 50% of RCA with fiber fulfills which was PVA which were designed as for the requirement of construction industry. The results show that by adding more amount of RHA and RCA the concrete strength starts decreasing. Tests performed over concrete: Rebound Hammer Test, Flexural Strength Test, Water Absorption Test, Compressive Strength Test, Split Tensile Strength Test, and Ultrasonic Pulse Velocity Test.
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Christova, Nelly, Boryana Tuleva, Rashel Cohen, Galya Ivanova, Georgy Stoev, Margarita Stoilova-Disheva, and Ivanka Stoineva. "Chemical Characterization and Physical and Biological Activities of Rhamnolipids Produced by Pseudomonas aeruginosa BN10." Zeitschrift für Naturforschung C 66, no. 7-8 (August 1, 2011): 394–402. http://dx.doi.org/10.1515/znc-2011-7-811.

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Pseudomonas aeruginosa BN10 isolated from hydrocarbon-polluted soil was found to produce rhamnolipids when cultivated on 2% glycerol, glucose, n-hexadecane, and n-alkanes. The rhamnolipids were partially purified on silica gel columns and their chemical structures elucidated by combination of one- and two-dimensional 1H and 13C NMR techniques and ESI-MS analysis. Eight structural rhamnolipid homologues were identified: Rha-C10- C8, Rha-C10-C10, Rha-C10-C12:1, Rha-C10-C12, Rha2-C10-C8, Rha2-C10-C10, Rha2-C10-C12:1, and Rha2-C10-C12. The chemical composition of the rhamnolipid mixtures produced on different carbon sources did not vary with the type of carbon source used. The rhamnolipid mixture produced by Pseudomonas aeruginosa BN10 on glycerol reduced the surface tension of pure water from 72 to 29 mN m-1 at a critical micellar concentration of 40 mg l-1, and the interfacial tension was 0.9 mN m-1. The new surfactant product formed stable emulsions with hydrocarbons and showed high antimicrobial activity against Gram-positive bacteria. The present study shows that the new strain Pseudomonas aeruginosa BN10 demonstrates enhanced production of the di-rhamnolipid Rha2-C10-C10 on all carbon sources used. Due to its excellent surface and good antimicrobial activities the rhamnolipid homologue mixture from Pseudomonas aeruginosa BN10 can be exploited for use in bioremediation, petroleum and pharmaceutical industries.
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Sambo, Paolo, Franco Sannazzaro, and Michael R. Evans. "Physical Properties of Ground Fresh Rice Hulls and Sphagnum Peat Used for Greenhouse Root Substrates." HortTechnology 18, no. 3 (January 2008): 384–88. http://dx.doi.org/10.21273/horttech.18.3.384.

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Ground fresh rice (Oryza sativa) hull materials were produced by grinding whole fresh rice hulls and passing the resulting product through a 1-, 2-, 4- or 6-mm-diameter screen to produce a total of four ground rice products (RH1, RH2, RH4, and RH6, respectively). The physical properties and water release characteristics of sphagnum peatmoss (peat) and the four ground rice hull products were evaluated. All of the ground rice hull products had a higher bulk density (Bd) than peat, and as the grind size of the rice hull particle decreased, Bd increased. Peat had a higher total pore space (TPS) than all of the ground rice hull products except for RH6. As grind size decreased, the TPS decreased. Peat had a lower air-filled pore space (AFP) than all of the ground rice hull products and as the grind size of the rice hull products decreased, AFP decreased. Peat had a higher water holding capacity (WHC) than all of the ground rice hull products. Grind sizes RH4 and RH6 had similar WHC, whereas RH1 and RH2 had a higher WHC than RH4 and RH6. Peat, RH4, and RH6 had similar available water content (AVW), whereas RH2 had higher AVW than these materials and RH1 had the highest AVW. However, peat had the lowest AVW and easily available water (EAW) as a percentage of the WHC. The ground rice hull products RH1 and RH2 had the highest AVW and EAW of the components tested. Peat had the highest water content at container capacity. As pressure was increased from 1 to 5 kPa, peat released water more slowly than any of the ground rice hull products. The RH1 and RH2 ground hull products released water at a significantly higher rate than peat, but RH4 and RH6 released the most water over these pressures. For all rice hull products, most water was released between 1 and 2 kPa pressure. The rice hull products RH1 and RH2 had physical properties that were within recommended ranges and were most similar to those of peat.
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Hulke, Brent S., and Thomas J. Gulya. "Registration of the Oilseed Restorer Sunflower Germplasms RHA 472, RHA 473, RHA 474, and RHA 475, Possessing Resistance to Sclerotinia Head Rot." Journal of Plant Registrations 9, no. 2 (April 10, 2015): 232–38. http://dx.doi.org/10.3198/jpr2014.12.0084crg.

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Dewi, Sri Jayanti, Putra Jaya Ramadhansyah, Abdul Hassan Norhidayah, A. Aziz Md. Maniruzzaman, Mohd Rosli Hainin, and Mohd Haziman Wan Ibrahim. "Effect of Rice Husk Ash Fineness on the Properties of Concrete." Applied Mechanics and Materials 554 (June 2014): 203–7. http://dx.doi.org/10.4028/www.scientific.net/amm.554.203.

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In the present research, the effect of rice husk ash fineness on the properties of concrete was studied. Eight different fineness grades of rice husk ash were examined. A rice husk ash dosage of 15% by weight of binder was used throughout the experiments. The water-to-binder ratio was 0.49 to produce concrete having target strength of 40MPa at 28 d. Workability, compressive strength and gas permeability tests were carried out to identify the properties of concrete. The results revealed that increasing the fineness of RHA by mechanical grinding was found to improve the workability of RHA blended cement concrete. In addition, the use of RHA3 with mean particle size of 9.52μm produces the concrete with good strength. Finally, significant improvement was observed in mixtures incorporating RHA in terms of permeability coefficient.
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Thumrongvut, Jaksada, Sittichai Seangatith, Chayakrit Phetchuay, and Cherdsak Suksiripattanapong. "Comparative Experimental Study of Sustainable Reinforced Portland Cement Concrete and Geopolymer Concrete Beams Using Rice Husk Ash." Sustainability 14, no. 16 (August 10, 2022): 9856. http://dx.doi.org/10.3390/su14169856.

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The ordinary Portland cement (PC) manufacturing process emits toxic carbon dioxide into the environment. Minimizing cement consumption in the construction industry is a major scholarly priority. This paper studies the comparison of reinforced Portland cement concrete and geopolymer concrete beams, in which rice husk ash (RHA) is used as a partial replacement for cement. The study aims to determine the optimum mix proportion of Portland cement concrete with RHA (PC-RHA) and geopolymer concrete with RHA (GC-RHA) for compressive strength that meets the requirements for normal strength concrete of 18, 25, and 32 MPa and compares to ones of the control PC without RHA. Then, the load behaviors and the failure modes of the reinforced PCC beam and reinforced GC beam using RHA as partially PC (PC-RHA beam and GC-RHA beam) were investigated. The obtained experimental load capabilities were also compared to ones predicted by the equation for designing reinforced concrete beams developed by ACI Committee 318. According to the test results, the compressive strength of the PC-RHA and GC-RHA decreased when there was a higher proportion of RHA replacement in the concrete. In terms of the structural behavior, all the PCC, PC-RHA, and GC-RHA beam curves are bilinear up to the first crack load and before the yield load, then become nonlinear after the yield load of the beam specimens. The maximum crack width of the GC-RHA beam was less than that of the PC-RHA beam. Furthermore, the GC-RHA beam was more ductile than the PC-RHA beam. Finally, the ACI equation provides reliable predictions with a margin of error of 4 to 7%. This concludes that the experimental load capabilities of the PC-RHA beam and GC-RHA beam were consistent with the ACI design equation.
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Hartigan, Elaine, Peter FitzGerald, and Mary Kelly. "RHA Banquet Exhibition, RHA Gallagher Gallery, Dublin, October - November 1997." Circa, no. 82 (1997): 61. http://dx.doi.org/10.2307/25563225.

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Dissertations / Theses on the topic "RHA"

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Amaral, Marília Abrahão. "Modelo RHA - Retroalimentação em Hipermídia Adaptativa." Florianópolis, SC, 2008. http://repositorio.ufsc.br/xmlui/handle/123456789/90895.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia e Gestão do Conhecimento
Made available in DSpace on 2012-10-23T16:29:30Z (GMT). No. of bitstreams: 1 255755.pdf: 1875883 bytes, checksum: 9f0f27e2e8d0618ff0e4a59173c66d38 (MD5)
A presente pesquisa tem como objetivo propor uma extensão para modelos de referência em hipermídia adaptativa de acordo com resultados de avaliação de aprendizagem e estilos cognitivos dos aprendizes. É proposto, portanto, um modelo denominado RHA, Modelo de Retroalimentação em Hipermídia Adaptativa, que utiliza os resultados obtidos com as avaliações de aprendizagem e as definições derivadas dos estilos cognitivos dos aprendizes a fim de prover a retroalimentação dos demais modelos existentes em um hipermídia adaptativo. Na concepção do RHA foi adotada a representação por meio da UML (Unified Modeling Language) com objetivo de diminuir o risco de ambigüidade, facilitar o processo de modelagem computacional, proporcionar o reaproveitamento do modelo e otimizar a implementação do mesmo. Para apoiar a criação do RHA, foi adotado o modelo de referência Munich. Este utiliza UML e apresenta uma arquitetura que contempla módulos tradicionais dos hipermídias adaptativos, tais como: modelo de domínio, de usuário e de adaptatividade; porém, como os demais modelos de referência atuais, este não contempla a definição de itens explícitos à reutilização dos dados obtidos com as avaliações de aprendizagem. O modelo RHA foi criado como uma extensão do Munich, com concepção fundamentada em duas dimensões de estilos cognitivos estabelecidos (MESSICK, 1976), que nortearam a escolha de instrumentos de avaliação de aprendizagem destinados à modalidade ensino a distância. Os instrumentos de avaliação de aprendizagem abrangem atividades definidas de acordo com um grupo de ferramentas de comunicação e interação (síncronas e assíncronas) amplamente adotadas no ensino a distância. A modelagem do RHA envolve aspectos relativos a UML, como a criação das classes com seus atributos e métodos e os relacionamentos entre as classes já existentes no Munich. Para simular a aplicação do modelo RHA, foi definido um domínio de conhecimento relacionado à área de apoio ao ensino sobre Mercado de Capitais. Este tema se mostrou adequado, pois dada à quantidade de materiais e informações disponíveis sobre o assunto, é relevante a adoção de diferentes estilos de aprendizagem com tipos particulares de conteúdos e empregos das ferramentas de comunicação e interação, visando à avaliação de aprendizagem, para públicos distintos. Atualmente o número de cursos a distância no referido domínio de conhecimento é escasso, o que o torna ainda mais relevante para exploração.
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Schurter, Brandon T. "Regulation of RHA and NIP45 function by arginine methylation /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2005. http://wwwlib.umi.com/cr/ucsd/fullcit?p3166397.

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Khalil, Roya, and roya khalil@gmail com. "Impact of the surface chemistry of rice hull ash on the properties of its composites with polypropylene." RMIT University. Civil & Chemical Engineering, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090219.115140.

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Rice hull ash (RHA) is a by-product of the rice industry. RHA is produced when rice hulls are incinerated, for example, when they are used to power steam engines in rice milling plants. Typically, this ash is disposed of in landfill sites, which may cause environmental problems. RHA has a naturally occurring silica content that is very high, ranging from 95 to 98%. This high silica content makes RHA a potential filler for polymer products. The aim of this project was to investigate the application of RHA as a filler in polypropylene. The study used a systematic approach to characterising the RHA physiochemical properties and comparing these to another commercially available grade of silica filler. The processing conditions for mixing RHA with Polypropylene (PP) were optimised to obtain the maximum tensile modulus value. Attempts were made to improve the interaction of RHA and PP by treating the RHA surface with silane coupling agents and adding functionalised polymers to the composite. Mechanical, rheological and morphological properties of the non-silanated, silanated and coupled composites were characterised and compared to determine their structure -property relationships. Rice hull ash (RHA) has a similar chemical structure to other silicas. Like any metals and metalloids, the surface of RHA contains -OH functional groups but these are very limited in quantity. RHA and PP composites have a wide processing window and the optimised processing conditions in a small batch mixer are 12 minutes, 60 rpm and 180°C. Addition of RHA into PP increases the modulus but decreases the tensile strength of the composites, attributed to poor compatibility between RHA and PP, as RHA is hydrophilic and PP is hydrophobic. The optimum loading of RHA is 20wt%. To improve the RHA and PP composites, 2 grades of silane and maleic anhydride grafted PP (MAPP) is used. Silane treated RHA composites have improved mechanical properties, especially tensile strength, attributed to enhanced interfacial interaction. The optimum is 1.5wt% for APS and 2.wt% for MPS in this system. The optimum MAPP concentration in this system is 3wt%. Properties of the RHA / PP composites show modest improvements compared to PP. The properties are not sufficient to make RHA a commercially attractive reinforcing filler for PP for high performance composite. It has potential for a cost reduction filler for low end application composites.
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Matkovic, Roy. "Caractérisation de l'implication de l'hélicase DHX9 (RHA) dans le cycle de multiplication du virus Chikungunya." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT007.

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Les virus sont des parasites intracellulaires obligatoires recrutant des cofacteurs cellulaires afin de détourner les différents processus biologiques leur permettant notamment de répliquer leur génome et de former d'autres particules virales. Si des cofacteurs cellulaires de la réplication du virus Semliki Forest ont été récemment identifiés, très peu d'études ont permis de révéler des partenaires de la réplication du proche Alphavirus Chikungunya (CHIKV). Nous avons découvert, au cours de cette étude, un recrutement d'Hélicases à domaine DExD/H au niveau de sites de réplication du CHIKV. Parmi elles, DHX9 ou RNA Helicase A (RHA), grâce à ses propriétés de liaison et de modulation de structures des ARNs ou de complexes de Ribonucléoprotéines, est impliquée dans diverses fonctions depuis la transcription, la traduction, la réplication de génomes et jusqu'à la production de particules infectieuses de nombreux virus. Dans le cas du virus Chikungunya, nous avons caractérisé une fonction provirale dans la traduction de protéines non-structurales et une fonction antivirale dans la réplication du génome. Cette double fonction opposée est manipulée par le CHIKV afin d'assurer une production de protéines non-structurales composant le complexe de réplication tout en maintenant sa réplication. Ces travaux révèlent un nouveau mécanisme de régulation de la traduction d'ARN génomique de CHIKV et apportent des éléments de compréhension dans la dynamique de passage du phénomène de traduction à l'étape de réplication du génome CHIKV
Viruses are obligate intracellular parasites recruiting cellular cofactors to divert different biological processes enabling them to replicate their genome and to form other viral particles. If cellular cofactors of Semliki Forest virus replication have recently been identified, very few studies have revealed the replication partners of the very close Alphavirus Chikungunya (CHIKV). During this study, We have discovered recruitments of several DExD/H Box Helicases at the CHIKV replication sites. Among them, DHX9 or RNA Helicase A (RHA) through its RNA binding properties and in modulating RNA secondary structures or Ribonucleoproteins complexes, is involved in various functions from transcription, translation, replication of genomes and up to production of infectious particles of many viruses. In the case of Chikungunya virus, we have characterized a proviral function in the translation of non-structural proteins and an antiviral function in the genome replication. These opposite functions are manipulated by CHIKV to ensure production nonstructural proteins, components of the CHIKV replication complex while maintaining its replication. These works reveal a new translation regulation mechanism of CHIKV genomic RNA and bring some knowledge on the passage from the translation stage to the replication step of CHIKV genome
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Pedreschi, Luciana Erthal. "O tratamento centrado no paciente e a RHA : validação da versão brasileira do PCQ-Infertilidade." Master's thesis, FEUC, 2016. http://hdl.handle.net/10316/35221.

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Dissertação de mestrado em Gestão e Economia da Saúde, apresentada à Faculdade de Economia da Universidade de Coimbra, sob a orientação de Pedro Lopes Ferreira.
Objetivo: O presente estudo teve como objetivos desenvolver a validação da versão brasileira do questionário PCQ-Infertilidade, verificar a correlação entre o itens avaliados através dos instrumentos PCQ Infertilidade e o FertiQol, e investigar as características psicométricas da versão brasileira do questionário PCQ-Infertilidade, através de um grupo de pacientes de duas clínicas especializadas no Rio de Janeiro. Metodologia: Tradução do questionário de sua língua original (inglês) para o português brasileiro por dois tradutores, retradução para inglês por um tradutor com inglês nativo, comparação dos resultados, aplicação do questionário em dois ambientes clínicos diferentes, juntamente com um outro instrumento já validado e análise dos resultados para validação do instrumento. Resultados: Total de 113 respostas de mulheres inférteis em fase de diagnóstico ou tratamentos de fertilidade no Rio de Janeiro, Brasil. A versão em português – Brasil do PCQ – Infertilidade apresentou boa consistência interna e a análise fatorial demonstrou que a amostra é ideal para a realização da análise. Pode-se verificar melhores avaliações dos pacientes na instituição que oferece o serviço mais individualizado. Conclusão: A versão em português - Brasil do PCQ-Infertilidade se mostrou válida e fidedigna. Como estratégias para melhorar a perceção dos pacientes de qualidade dos tratamentos, as clínicas devem tentar trabalhar na diminuição da ansiedade dos pacientes antes, durante e depois dos ciclos de tratamento, facilitando o contato destes com profissionais para discutirem sobre preocupações, participarem das tomadas de decisão e obter informações sobre o processo.
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Hidalgo, F., F. Hidalgo, J. Saavedra, C. Fernandez, and G. Duran. "Stabilization of clayey soil for subgrade using rice husk ash (RHA) and sugarcane bagasse ash (SCBA)." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651798.

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This document studies the stabilization of the soil used as a subgrade, by adding locally available materials such as rice husk ash (RHA) and sugarcane bagasse ash (SCBA). These aggregates were added to the soil in substitution by weight between 5%, 7.5% and 10%. By adding these, the expansiveness is reduced while the maximum dry density increases, in addition the tendency of CBR is increasing and then tends to decrease proportionally to the addition of the aforementioned aggregates. This indicates a peak in CBR and expandability. The best result obtained from CBR was 33.75% with the 5% replacement mixtures.
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Lim, So Ra. "Da imagem à palavra : medo e ousadia em Hye Seok Rha, Tarsila do Amaral e Frida Kahlo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/4595.

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Partindo da noção de interdisciplinaridade, este trabalho se centra na questão de gênero comparando formas diferentes do discurso narrativo, particularmente, em imagens e em textos autobiográficos produzidos por três mulheres artistas de diversas procedências, como a coreana Hye Seok Rha, a brasileira Tarsila do Amaral, e a mexicana Frida Kahlo. O trabalho investiga aspectos em comum e divergentes da linguagem utilizada pelas mulheres artistas, enquanto procura responder questões sobre a auto-representação feminina e as narrativas de cunho pessoal de autoria feminina. Sob esse ângulo, faz-se incursões teóricas em duas direções: uma relacionada com a questão dos gêneros artísticos, e a outra, com o ato de criar das mulheres como possibilidade de saírem da invisibilidade histórica a que foram submetidas durante séculos, tanto no terreno das artes plásticas quanto no da literatura. Desta forma, evidencia-se a existência de relações interdisciplinares que situam o presente trabalho no terreno da literatura comparada.
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Fritz, Sarah E. "Molecular basis of the DExH-box RNA helicase RNA helicase A (RHA/DHX9) in eukaryotic protein synthesis." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437413252.

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Díaz, Morán Sira. "Temerosidad en ratas heterogéneas (N/NIH-HS) y romanas (RHA/RLA): estudios hormonales y de expresión génica diferencial." Doctoral thesis, Universitat Autònoma de Barcelona, 2012. http://hdl.handle.net/10803/133270.

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La presente Tesis tuvo como objetivos, estudiar la diferencia en ansiedad y otros rasgos conductuales relacionados (p. ej. miedo, susceptibilidad al estrés), a través de una batería de tests conductuales, en tres cepas o stocks de ratas diferentes (RHA-I -poco ansiosas-, RLA-I –muy ansiosas- y N/Nih-HS –ratas genéticamente heterogéneas-), y relacionar dichos perfiles conductuales/psicológicos con la expresión diferencial de genes en estructuras/circuitos cerebrales de conocida importancia en tales fenotipos (p. ej. amígdala e hipocampo). Para alcanzar tales objetivos, se realizaron dos estudios (Estudio 1, con 128 ratas macho de los tres stocks/cepas mencionados; Estudio 2, con 114 ratas macho), que incluyeron las siguientes pruebas conductuales: Laberinto Circular Elevado (ansiedad incondicionada), test de actividad en situación de novedad (“timidez” y habituación en una “Caja nueva”), test de Campo Abierto, miedo condicionado a un contexto (respuesta de petrificación condicionada), adquisición de evitación activa en dos sentidos en la “Shuttle-box” (ansiedad debida a un conflicto de doble evitación –pasiva y activa- condicionada) y test de natación forzada (como modelo de síntomas relacionados con la depresión y los efectos de los antidepresivos). En el Estudio 1 se obtuvieron también medidas hormonales (ACTH, corticosterona y prolactina) en respuesta al estrés de exponer los animales a una ambiente nuevo y desconocido durante 20 minutos. Tras el análisis conductual y hormonal de estos dos estudios, en el Estudio 3 se llevó a cabo un análisis de expresión génica en amígdala e hipocampo (análisis de microarray y qRT-PCR) de subgrupos de ratas N/Nih-HS seleccionadas (a partir del Estudio 1) por presentar valores extremos en ansiedad (subgrupos de “Baja ansiedad” o “Alta ansiedad”). A partir de este análisis se pudo concluir que: a) las ratas N/Nih-HS presentan un perfil de comportamiento defensivo y hormonal cercano al estilo de afrontamiento pasivo característico de las ratas RLA-I; b) la heterogeneidad genética de las ratas N/Nih-HS y los resultados obtenidos en el análisis de microarray, permiten que sea un modelo animal útil para el estudio de las bases genéticas de la ansiedad y el miedo; c) los análisis de microarray han detectado expresión diferencial (entre dichos subgrupos de ratas extremas en ansiedad) de genes implicados en la regulación de funciones neuroendocrinas, como la prolactina, arginina-vasopresina y la oxitocina, que podrían modular las respuestas de ansiedad y miedo condicionado en amígdala e hipocampo. d) También se ha observado expresión diferencial (entre ambos subgrupos de ratas extremas en ansiedad) de genes reguladores de receptores sensoriales (sobretodo olfativos), genes de receptores opioides (como Oprd1 y Oprl1), genes que participan en funciones inmunológicas (como el gen H2-M9) y genes relacionados con la función tiroidea, como el gen TRH, Tg en hipocampo o el gen Duox2 en amígdala.
The main aim of the present Thesis was to study differences in anxiety and related behavioral dimensions (e.g. fear, susceptibitilty to stress) in three different rat strains/stocks (i.e. the RHA-I –low anxious-, RLA-I –high anxious- and the N/Nih-HS –genetically heterogeneous- rat stock), as well as to study the associations among these behavioural profiles and differential gene expression in anxiety/fear/stress-related brain areas (i.e. amygdala and hippocampus). We conducted two studies (Study 1, using 128 male rats from those three strains/stocks; Study 2, using 114 male rats) to achieve those objectives, using a behavioural test battery which included: Elevated zero-maze test (unconditioned anxiety), novelty-induced exploratory activity (unconditioned fearfulness or “timidity” in a “Novel cage”), Open field test, context-conditioned fear (freezing), acquisition of two-way active avoidance in a shuttle box (instrumental aversive learning mediated by conditioned anxiety/fear, due to the double “passive avoidance/active avoidance” conflict) and forced swimming test (“depressive-related” symptoms: a model for the screening of antidepressant drugs). Baseline and post-stress (i.e. 20-min exposure to a novel cage) hormone measurements (ACTH, corticosterone and prolactin) were also obtained in Study 1. Following the behavioural and hormonal analyses of both studies a gene expression study (Study 3) was carried out. Thus, in Study 3, differential gene expression was assessed (through microarray analysis and qRT-PCR) in amygdala and hippocampus from subgroups of N/Nih-HS rats selected (from Study 1) according to their “low anxiety” or “high anxiety” behavioural profiles. From the analyses of the different studies we can conclude that: a) regarding their anxiety/fearfulness, passive coping style, “depressive-like” and stress-induced hormonal responses, the N/Nih-HS rats resemble the phenotype profiles of the relatively high-anxious and stress-prone RLA-I rat strain; b) the characteristic genetic heterogeneity of the N/Nih-HS rat stock, and the microarray gene expression results, point to that rat stock as an useful animal model to study the genetic basis of anxiety and fear; c) microarray analysis detected differential expression (between the above mentioned subgroups of N/Nih-HS rats with extreme low or high anxiety) of genes involved in the regulation of neuroendocrine functions, such as prolactin, arginine-vasopressin and oxytocin, which could participate in the modulation on anxiety and fear responses. d) Microarray analysis also detected differential expression of sensory receptor genes, opioid receptor genes (i.e. Oprd1 and Oprl1), immunity-related genes (like H2-M9) and thyroid regulatory genes, like TRH and Tg (hippocampus) and Duox 2 (amygdala).
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Qian, Shuiming. "Study of retrovirus and host interplay: RNA helicase A and microRNA pathway modulate viral gene expression." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1236621870.

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Books on the topic "RHA"

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RHA, McGuire Edward, McGuire Sally, and Cronin Anthony, eds. Edward McGuire, RHA. Blackrock, Co. Dublin: Irish Academic Press, 1991.

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P, Flanagan T., Anglesea Martyn 1947-, and Ulster Museum, eds. T.P. Flanagan, RHA, PPRUA. Dublin: Four Courts Press in association with the Ulster Museum, 1995.

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Royal Hibernian Academy of Arts., ed. Amelia Stein: Photographs : RHA 2009. Dublin: Royal Hibernian Academy, 2009.

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Zannoner, Paola. Mia e l'amuleto di Rha. Milano: Mondadori, 2003.

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Sītā. Khyui rha rha pyā r̋aññʻ nvaṃ ʼa pā ʼa vaṅʻ maggajaṅʻ v̋atthu tui myā /̋. Ranʻ kunʻ: Vaṅʻ C̋ā pe, 1999.

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Manitoba. Office of the Auditor General. An examination of RHA governance in Manitoba. Winnipeg: The Auditor General, 2003.

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Kennedy, S. B. Frank McKelvey, RHA, RUA: A painter in his time. Blackrock, Co. Dublin: Irish Academic Press, 1993.

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kveʺ, Ī krā. Tveʹ ra kruṃ ra rha ta ta leʺ tve. Ranʻ kunʻ: Sokrā Cā pe, 2003.

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Pangmulgwan, Suwŏn. Na nŭn Na Hye-sŏk ida: Rha Hye Seok. Kyŏnggi-do Suwŏn-si: Suwŏn Pangmulgwan, 2011.

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Tony, Corcoran, and Kellett John, eds. Carrick: Desmond Carrick, RHA : the lie of the land. Kinsale, Co. Cork: Gandon Editions, 2009.

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Book chapters on the topic "RHA"

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Elakkiah, Chinnadurai. "Rice Husk Ash (RHA)—The Future of Concrete." In Lecture Notes in Civil Engineering, 439–47. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-3317-0_39.

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Son, Ji-youn, and Tatsuya Kageki. "The West, Asia, and women in Rha Hye-seok's Travels1." In Women in Asia under the Japanese Empire, 63–79. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003279990-7.

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Chinella, John F. "Modeling Performance of Protection Materials Aluminum 7020-T651 and RHA Steel." In Supplemental Proceedings, 221–28. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118062142.ch28.

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Ahmad, Juhaizad, Mohd Ikmal Fazlan Rosli, and Abdul Samad Abdul Rahman. "The Effect of Rice Husk Ash (RHA) Mixtures on Geotechnical Properties of Soil." In Regional Conference on Science, Technology and Social Sciences (RCSTSS 2016), 345–52. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0074-5_33.

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Kumari, Sunita, Dinesh Chander, and Rinku Walia. "Investigation on Suitability of GHA – RHA as Partial Replacement of Cement in Concrete." In Lecture Notes in Civil Engineering, 241–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02707-0_30.

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Balapour, Mohammad, Erfan Hajibandeh, and AliAkbar Ramezanianpour. "Engineering Properties and Durability of Mortars Containing New Nano Rice Husk Ash (RHA)." In High Tech Concrete: Where Technology and Engineering Meet, 199–206. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_25.

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Tambe, Yogesh, and Pravin Nemade. "Performance of Conventional Concrete Integrated with RHA and GGBS As a Cementitious Material." In Techno-Societal 2020, 341–53. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69925-3_34.

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Balamurugan, K., Y. Jyothi, Chinnamahammad Bhasha, and S. Vigneshwaran. "Erosion Studies on Al/TiC/RHA Reinforced Hybrid Composites through Response Surface Method." In Metal Matrix Composites, 117–37. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003345466-7.

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Ahsan, Mohammad Badrul, and Zahid Hossain. "Use of Rice Husk Ash (RHA) as a Sustainable Cementitious Material for Concrete Construction." In Materials for Sustainable Infrastructure, 197–210. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-61633-9_12.

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Peng, Z., and R. C. Batra. "On the Propagation of a Shear Band in a Thick-Wall RHA Steel Tube." In Computational Mechanics ’95, 1342–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79654-8_217.

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Conference papers on the topic "RHA"

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XING, Boyang, Yunhui HOU, Zhenyan GUO, Dongjiang ZHANG, Liang CHEN, Yongliang Yang, Jianhua Luo, Rongzhong LIU, and Rui GUO. "Analysis of the distribution of BAD generated during the normal penetration of a variable cross-section EFP on RHA." In 2019 15th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/hvis2019-003.

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Abstract The purpose of this study is to analyse how the thickness of Rolled Homogeneous Armor (RHA) and impact velocity of an Explosively Formed Projectile (EFP) influence the middle mass behind-armor debris (BAD) when a variable cross-section EFP penetrates RHA normally. Numerical simulation is adopted, the thickness of RHA varies from 10mm to 70mm, and the impact velocity of the EFP varies from 1650m/s to 1860m/s. The results indicate that: (1) when the impact velocity of the EFP is 1650m/s and the thickness of RHA varies from 10mm to 70mm, p1g of the RHA and EFP decreases with increasing H0. The thin target could be used to produce a large proportion of the middle mass BAD from RHA (including BAD from the EFP and BAD from the RHA and EFP). (2) When the impact velocity of the EFP varies from 1650m/s to 1860m/s and the thickness of the RHA is 40mm, p1g of the RHA is less than 50%, p1g of the EFP is more than 70%, and p1g of the RHA and EFP is more than 50%.
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Musso Laespiga, Marcos, and Leonardo Behak Katz. "Performance of Low-Volume Roads with Wearing Course Layer of Silty Sandy Soil Modified with Rice Husk Ash and Lime." In CIT2016. Congreso de Ingeniería del Transporte. Valencia: Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/cit2016.2016.3451.

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Rice husk ash (RHA) is a by-product of rice milling. Its use as soil stabilizer is a way to replace the final disposal with environmental benefit. However, RHA is not cementitious itself but when mixed with lime forms cements which improve the soil properties. A research of performance of a silty sandy soil modified with RHA and lime as wearing course layer of low-volume roads was conducted through two full-scale test sections with different pavements built in Artigas, northern Uruguay. The alkaline reactivity of RHA is low because the husk burning is not controlled. The soil-RHA-lime mix design was conducted according to the Thompson’s Method. The pavement test sections were monitored through deflection measures by Benkelman beam and observations of surface condition. The deflections decreased over time in both test sections due to the development of cementation of the study materials. After one year, the dust emission was reduced, the wet skid resistance of pavement surfaces improved and there was not rutting. The researched pavements have had a good performance under the existing traffic and environmental conditions, demonstrating that wearing course layer of silty sand modified with RHA and lime is an alternative to improve the condition of low-volume roads and to replace the final disposal of RHA, with environmental, social and economic benefits.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3451
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Idusuyi, Nosa, Peter Ozaveshe Oviroh, and Adetoye Henry Adekoya. "A Study on the Corrosion and Mechanical Properties of an Al6063 Reinforced With Egg Shell Ash and Rice Husk Ash." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86662.

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Aluminium based metal matrix composites (MMCs) have received considerable attention in the last decade for its potential industrial applications. One of the challenges encountered using Aluminium based MMCs is understanding the influence of the reinforcement particles on the corrosion resistance and mechanical properties. In this study the corrosion behaviour and mechanical properties of Al6063 reinforced with egg shell ash and rice husk ash were investigated. Waste Egg Shell Ash (ESA) and Rice Husk Ash (RHA) 212 μm in size were used to produce the composites with 10 wt% of reinforcements via stir casting technique. The RHA and ESA were added in the ratios of 10:0, 7.5:2.5, 5:5, 2.5:7.5, 0:10. Unreinforced Al6063 was used as baseline material. Immersion tests, potentiodynamic polarization techniques, tensile tests, optical microscopy (OM) and scanning electron microscopy (SEM) were used to characterize the composites. The results showed that reinforcing with 7.5 wt% RHA + 2.5 wt% ESA provided the highest resistance to corrosion. Generally, a reduction in the corrosion rates were observed for the reinforced composites as the wt% of RHA increased. Porosity levels of the composites reduced with an increase in the percentage of ESA in the matrix. Microstructural characterization using SEM and OM revealed a distribution of pits on the composite surfaces which was more severe with increasing RHA percentage. The UTS (ultimate tensile stress) results revealed that the composite containing 10 wt% RHA had the maximum value of 161 MPa. The results demonstrate that rice husk ash and eggshell ash can be useful in producing low cost Aluminium composites with improved corrosion resistance and tensile properties.
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Akintola, Sarah, and Akinwale Akintola. "Performance Evaluation of Local Material Rice Husk Ash Under Downhole Conditions with the Addition of Basic Oil Well Additives Antifoam, Fluid Loss, Dispersant and Retarder on Oil Well Cementing." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/207144-ms.

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Abstract The effect of RHA on Compressive Strength as well as other parameters like Consistency and Rheological properties etc. on Class G cement slurry is studied. The following additives were used; Rice Husk Ash (for Compressive Strength), Guinea Corn Husk Ash (Retarder) and other liquid additives which are fluid Loss Additive, Antifoam, Dispersant, Retarder and Water in the formulation of the cement slurry. This research is a comparative analysis based on experimental study on the effectiveness of the various additives on the cement slurry using pure Class G cement slurry combined with all liquid additives as a control. At a Bottomhole Circulating Temperature of 140°C, the Compressive Strength tests carried out on the slurry samples showed that the strength of the concrete increases as the concentration of the RHA increases with time of curing, also the compressive strength started to increase. The best Compressive Strength result was obtained with the percentages of cement replaced by 13.01% RHA. The strength showed impressive increase with time, with highest compressive strength encountered in 24 hours. The Thickening Time of the set Cement Slurry was considered using Class G cement and different percentage of RHA. The final Thickening Time decreases with increase in Rice Husk Ash. Decrease in the setting time was noticeable from 1.87 hrs (at 13.01% RHA) from 40bc to 100 bc. At BHST of 700°C increasing the ash concentration resulted in decrease in the Plastic Viscosities (PV) and increase in the Yield Points of the slurries. The results indicate that the slurries formulated using this ash has viscosities which are within the recommended values showing it is desirable to pump such slurry. For both 124°C and Bottom Hole Pressure of 7700psi the amount of fluid loss increases as the percentage of RHA added increases but it is below 50cp which is acceptable.
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Abfalter, Garry, and Nachhatter S. Brar. "Characterization of RHA and titanium 6-4 alloys." In SHOCK COMPRESSION OF CONDENSED MATTER - 2011: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2012. http://dx.doi.org/10.1063/1.3686460.

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Dang, Thanh, Nirupama Bulusu, Wu-chi Feng, and Wen Hu. "RHA: A robust hybrid architecture for information processing in wireless sensor networks." In 2010 Sixth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP). IEEE, 2010. http://dx.doi.org/10.1109/issnip.2010.5706803.

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Idrus, J., A. L. N. Mahirah, M. N. Masyitah, A. N. Shafieza, and S. Fatimah. "The suitability of sand-rice husk ash (RHA) blends for subbase applications." In ADVANCES IN CIVIL ENGINEERING AND SCIENCE TECHNOLOGY. Author(s), 2018. http://dx.doi.org/10.1063/1.5062646.

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Partom, Yehuda, and Dan Yaziv. "Penetration of L/D=10 and 20 tungsten alloy projectiles into RHA targets." In High-pressure science and technology—1993. AIP, 1994. http://dx.doi.org/10.1063/1.46345.

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Johnson, Alyssa, Allison LeBleu, and Ning Zhang. "Simulation for Optimization of a Filter Cake System." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-95717.

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Abstract The purpose of this project is to create a computational fluid dynamics (CFD) simulation of the cake filtration process for Agrilectric Research. Cake filtration is the process by which solid particulate is filtered out of a mixture of fluid and solid phases. As the mixture flows through the system, the particulate accumulates on a filter cloth to form a filter cake, which acts as an added filtering medium to the system. The results obtained from this project can be used to aid Agrilectric in the development of their experimental testing methods by providing the ability to measure and predict filtration properties and to experiment with different filter cake designs to improve filtration methods and performance, without reliance on empirical data. The work was completed using the Workbench platform with the Fluent solver from the Ansys Student software bundle. A 20 cm long, 10 cm diameter filter cell was modeled and meshed through Workbench and was imported into Fluent to conduct the simulation. The flow of a mixture of water and a particulate phase of rice hull ash (RHA) was simulated using the Eulerian multiphase model. This would show the movement of the RHA through the system and the accumulation of the particulate on a filter cloth over time. The filter cloth was modeled using a porous cell zone to mimic filtering properties. The simulated solution shows RHA flowing into the system and initially passing through the filter cloth. After some time, a packed layer of particulate forms across the width of the filter cloth that allows a filter cake to accumulate in the system. The results from the multiphase simulation prove that with more research and simulation development, the model can be improved to represent a realistic cake filtration system which can be used to supplement or to replace existing laboratory testing.
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Huot, N., G. Pauliat, J. M. C. Jonathan, G. Roosen, R. Scharfschwerdt, O. F. Schirmer, and D. Rytz. "Four fold improvement of the photorefractive time constant of BaTiO3:Rh by oxidation." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cfe2.

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Our spectroscopic studies have shown without ambiguity that the three charge states Rh3+, Rh4+, Rh5+ are responsible at 1.06 µm for the optical absorption and charge redistribution through hole photoconductivity in rhodium doped barium titanate [1]. From this three charge state model, we solved the charge transfer equations and used the obtained results to characterize as grown samples at 1.06 µm through induced absorption and two-wave mixing experiments [2]. A major feature is that the photoexcitation cross section from Rh5+ to the valence band is about 75 times larger than the one from Rh4+. These previous results suggest that the photorefractive rise time could be decreased by lowering the Fermi level by oxidation. This removes the positive charges of oxygen vacancies which compensate the negative charges of acceptors being present in the crystal. Compensation is then achieved by the positive charges of holes captured at Rh3+ (forming Rh4+) or at Rh4+ (forming Rh5+).
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Reports on the topic "RHA"

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Widianto, D. Suprayogo, Sudarto, and I. D. Lestariningsih. Implementasi Kaji Cepat Hidrologi (RHA) di Hulu DAS Brantas, Jawa Timu. World Agroforestry Centre (ICRAF), 2010. http://dx.doi.org/10.5716/wp10338.pdf.

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Struthers, Kim. Natural resource conditions at Fort Pulaski National Monument: Findings and management considerations for selected resources. National Park Service, December 2023. http://dx.doi.org/10.36967/2300064.

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The National Park Service (NPS) Water Resources Division’s Natural Resource Condition Assessment (NRCA) Program initiated an NRCA project with Fort Pulaski National Monument (FOPU) in 2022. The purpose of an NRCA is to synthesize information related to the primary drivers and stressors affecting natural resource conditions at a park and to report conditions for natural resource topics selected by park managers. Resource conditions are evaluated as either a condition assessment or a gap analysis, depending on data availability. For FOPU’s NRCA, managers selected salt marsh, shorebirds, Eastern oyster (Crassostrea virginica), and butterflies as the focal resources. FOPU is comprised of two islands in coastal Georgia, McQueens and Cockspur, which are separated by the Savannah River near its confluence with the Atlantic Ocean. Cockspur Island contains the 19th century masonry fort, Fort Pulaski, and the monument’s visitor services and facilities and is primarily constructed with dredge material from the Savannah River. McQueens Island is almost entirely salt marsh habitat and most of its area is eligible federal wilderness, containing one of Georgia’s oyster recreational harvest areas (RHAs), Oyster Creek RHA. Both McQueens and Cockspur islands are designated as a National Oceanic and Atmospheric Administration Marine Protected Area (MPA), underscoring FOPU’s natural resource significance. Riverine, freshwater, and estuarine wetlands cover 83.81% of FOPU, with the latter accounting for almost 99% of all monument wetlands. Persistently emergent vegetation of smooth cordgrasses (Spartina spp.) and unconsolidated shore represent the dominant wetland types. McQueens Island estuarine wetlands were evaluated for 11 functions and were rated primarily as high functioning, except for the wetland north of Highway 80, where the causeway has altered its ability to function properly. The wetland west of the Highway 80 bend is composed of unconsolidated material so was rated as moderately functioning in carbon sequestration, retention of sediments, and shore stabilization. In contrast, the unconsolidated shore wetland in the Oyster Creek RHA, where the highest concentration of FOPU’s oysters occurs, were rated high for all expected wetland functions. In 2013, over 75% of the total oyster area from within four of Georgia’s RHAs was in the Oyster Creek RHA. A spectral analysis of oyster density in Oyster Creek RHA, comparing 2013 and 2018 images, reported an increase in the high-density class, a decrease in the moderate-low class, and an increase in the no oyster class, with the latter likely a function of how oyster areas were drawn between the images. A successful 2013 enhanced reef project in Oyster Creek RHA reported a pre-enhancement oyster area of 2.68 m2 (28.8 ft2) that increased to 894.2 m2 (0.22 ac) of oysters by 2018. FOPU’s extensive salt marsh habitat and beaches provide critical food sources and habitat for shorebirds in the Atlantic Flyway, especially during the pre-breeding season. The American Oystercatcher (Haematopus palliates), Whimbrel (Numenius phaeopus), and the federally threatened rufa subspecies of Red Knot (Calidris canutus rufa) are identified as high priority species in the flyway and have been observed on Cockspur Island during the Manomet International Shorebird Surveys (2019–2022) at FOPU. The USFWS (2023) is seeking additional critical habitat designation, which will include Cockspur Island, for the rufa subspecies of Red Knot, whose estimated population abundance trend is declining throughout its entire range. FOPU’s non-wetland, upland habitat is primarily located on Cockspur Island and supports vegetation that can serve as host, roost and/or nectar plants for pollinators, especially butterflies. Cedar–Live Oak–Cabbage Palmetto (Juniperus virginiana var. silicicola–Q. virginiana–Sabal palmetto) Marsh Hammock and Cabbage Palmetto Woodland contain the most diversity of beneficial butterfly plants. While a comprehensive butterfly inventory is needed, fall migration surveys have recorded three target species of the Butterflies of the Atlantic Flyway (BAFA): monarch (Danaus plexippus), gulf fritillary (Agraulis vanillae), and cloudless sulphur (Phoebis sennae). Collectively, FOPU’s natural resources are affected by the sea level, which has risen by 0.35 m (1.15 ft) from 1935 to 2022. Hardened shorelines, such as causeways or armored structures, are identified as the greatest threat to the salt marsh habitat’s ability to migrate upland with continued sea level rise. Erosion along Cockspur Island’s north shore is an ongoing issue and FOPU managers have been working with the U.S. Army Corps of Engineers to develop solutions to address the erosion, while also creating habitat for shorebirds. Several agencies routinely monitor for water and sediment pollution in and around FOPU, which, if managed collectively, can inform landscape-level management actions to address drivers that are influencing resource conditions at the ecosystem level.
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Sharon, Amir, and Maor Bar-Peled. Identification of new glycan metabolic pathways in the fungal pathogen Botrytis cinerea and their role in fungus-plant interactions. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7597916.bard.

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The involvement of glycans in microbial adherence, recognition and signaling is often a critical determinant of pathogenesis. Although the major glycan components of fungal cell walls have been identified there is limited information available on its ‘minor sugar components’ and how these change during different stages of fungal development. Our aim was to define the role of Rhacontaining-glycans in the gray mold disease caused by the necrotrophic fungus B. cinerea. The research was built on the discovery of two genes, Bcdhand bcer, that are involved in formation of UDP-KDG and UDP-Rha, two UDP- sugars that may serve as donors for the synthesis of cell surface glycans. Objectives of the proposed research included: 1) To determine the function of B. cinereaBcDh and BcEr in glycan biosynthesis and in pathogenesis, 2) To determine the expression pattern of BcDH and BcERand cellular localization of their encoded proteins, 3) Characterize the structure and distribution of Rha- containing glycans, 4) Characterization of the UDP-sugar enzymes and potential of GTs involved in glycanrhamnosylation. To address these objectives we generated a series of B. cinereamutants with modifications in the bchdhand bcergenes and the phenotype and sugar metabolism in the resulting strains were characterized. Analysis of sugar metabolites showed that changes in the genes caused changes in primary and secondary sugars, including abolishment of rhamnose, however abolishment of rhamnose synthesis did not cause changes in the fungal phenotype. In contrast, we found that deletion of the second gene, bcer, leads to accumulation of the intermediate sugar – UDP- KDG, and that such mutants suffer from a range of defects including reduced virulence. Further analyses confirmed that UDP-KDG is toxic to the fungus. Studies on mode of action suggested that UDP-KDG might affect integrity of the fungal cell wall, possibly by inhibiting UDP-sugars metabolic enzymes. Our results confirm that bcdhand bcerrepresent a single pathway of rhamnose synthesis in B. cinerea, that rhamnose does not affect in vitro development or virulence of the fungus. We also concluded that UDP-KDG is toxic to B. cinereaand hence UDP-KDG or compounds that inhibit Er enzymes and lead to accumulation of UDP-KDG might have antifungal activity. This toxicity is likely the case with other fungi, this became apparent in a collaborative work with Prof. Bart Thomma of Wageningen University, NETHERLANDS . We have shown the deletion of ER mutant in Verticillium dahlia gave plants resistance to the fungal infection.
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Carpita, Nicholas C., Ruth Ben-Arie, and Amnon Lers. Pectin Cross-Linking Dynamics and Wall Softening during Fruit Ripening. United States Department of Agriculture, July 2002. http://dx.doi.org/10.32747/2002.7585197.bard.

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Our study was designed to elucidate the chemical determinants of pectin cross-linking in developing fruits of apple and peach and to evaluate the role of breakage cross-linkages in swelling, softening, and cell separation during the ripening. Peaches cell walls soften and swell considerably during the ripening, whereas apples fruit cells maintain wall firmness but cells separate during late stages of ripening. We used a "double-reduction" technique to show that levels of non-methyl esters of polyuronic acid molecules were constant during the development and ripening and decreased only in overripe fruit. In peach, methyl and non-methyl esters increased during the development and decreased markedly during the ripening. Non-methyl ester linkages in both fruit decreased accompanied fruit softening. The identity of the second component of the linkage and its definitive role in the fruit softening remain elusive. In preliminary examination of isolated apples cell walls, we found that phenolic compounds accumulate early in wall development but decrease markedly during ripening. Quantitative texture analysis was used to correlate with changes to wall chemistry from the fresh-picked ripe stage to the stage during storage when the cell separation occurs. Cell wall composition is similar in all cultivars, with arabinose as the principal neutral sugar. Extensive de-branching of these highly branched arabinans pre-stages softening and cell-cell separation during over-ripening of apple. The longer 5-arabinans remain attached to the major pectic polymer rhamnogalacturonan I (RG I) backbone. The degree of RG I branching, as judged from the ratios of 2-Rha:2,4-Rha, also decreases, specially after an extensive arabinan de-branching. Loss of the 4-Rham linkages correlated strongly with the softening of the fruit. Loss of the monomer or polymer linked to the RG I produce directly or indirectly the softening of the fruit. This result will help to understand the fruit softening and to have better control of the textural changes in fruit during the ripening and especially during the storage. 'Wooliness', an undesirable mealy texture that is induced during chilling of some peach cultivars, greatly reduces the fruit storage possibilities. In order to examine the hypothesis that the basis for this disorder is related to abnormality in the cell wall softening process we have carried out a comparative analysis using the resistant cultivar, Sunsnow, and a sensitive one, Hermosa. We investigated the activity of several pectin- and glycan-modifying enzymes and the expression of their genes during ripening, chilling, and subsequent shelf-life. The changes in carbohydrate status and in methyl vs. non-methyl uronate ester levels in the walls of these cultivars were examined as well to provide a basis for comparison of the relevant gene expression that may impact appearance of the wooly character. The activities of the specific polygalacturonase (PGase) and a CMC-cellulase activities are significantly elevated in walls of peaches that have become wooly. Cellulase activities correlated well with increased level of the transcript, but differential expression of PGase did not correspond with the observed pattern of mRNA accumulation. When expression of ethylene biosynthesis related genes was followed no significant differences in ACC synthase gene expression was observed in the wooly fruit while the normal activation of the ACC oxidase was partially repressed in the Hermosa wooly fruits. Normal ripening-related loss of the uronic acid-rich polymers was stalled in the wooly Hermosa inconsistent with the observed elevation in a specific PGase activity but consistent with PG gene expression. In general, analysis of the level of total esterification, degree of methyl esterification and level of non-methyl esters did not reveal any major alterations between the different fruit varieties or between normal and abnormal ripening. Some decrease in the level of uronic acids methyl esterification was observed for both Hermosa and Sunsnow undergoing ripening following storage at low temperature but not in fruits ripening after harvest. Our results support a role for imbalanced cell wall degradation as a basis for the chilling disorder. While these results do not support a role for the imbalance between PG and pectin methyl esterase (PME) activities as the basis for the disorder they suggest a possible role for imbalance between cellulose and other cell wall polymer degradation during the softening process.
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5

Falk, A. Comment on Extracting alpha from B to rho rho. Office of Scientific and Technical Information (OSTI), October 2003. http://dx.doi.org/10.2172/826521.

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Bevan, A. Measurements of sin2 alpha phi_2 from B to pi pi, rho pi and rho rho Modes. Office of Scientific and Technical Information (OSTI), November 2004. http://dx.doi.org/10.2172/839802.

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7

Folsom, C. P., W. Liu, and R. L. Williamson. RIA Experimentation Benchmark. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1484691.

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Mosquera Castro, Tania, Roberto Bartolomé Abraira, Mario César Vila, Esperanza Martín Hernández, and Francisco Alonso Toucido. Rúa Nova Oeste. Institut Català d’Arqueologia Clàssica, 2022. http://dx.doi.org/10.51417/figlinae_062.

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Ficha del yacimiento Rúa Nova Oeste ubicado a Lugo (Lugo) incluida en el proyecto "Figlinae Hispanae (FIGHISP). Catálogo en red de las alfarerías hispanorromanas y estudio de la comercialización de sus productos".
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9

Mosquera Castro, Tania, Roberto Bartolomé Abraira, Mario César Vila, Esperanza Martín Hernández, and Francisco Alonso Toucido. Rúa Nova Este. Institut Català d’Arqueologia Clàssica, 2022. http://dx.doi.org/10.51417/figlinae_061.

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Ficha del yacimiento Rúa Nova Este ubicado a Lugo (Lugo) incluida en el proyecto "Figlinae Hispanae (FIGHISP). Catálogo en red de las alfarerías hispanorromanas y estudio de la comercialización de sus productos".
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10

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, January 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 mosaic virus (CMV) can overcome RDR1-dependent resistance. The objectives were slightly changed due to the unique finding that cucumber has four different RDR1 genes. Background to the topic: RDR1 is a key plant defense against viruses. RDR1 is induced by virus infection and produces viral and plant dsRNAs which are processed by DICERs to siRNAs. siRNAs guide specific viral and plant RNA cleavage or serve as primers for secondary amplification of viral-dsRNA by RDR. The proposal is based on our preliminary results that a. the association of siRNA and RDR1 accumulation with multiple virus resistance, and b. that virus infection induced the RDR1-dependent production of a new class of endogenous siRNAs. However, the precise mechanisms underlying RDR1 induction and siRNA biogenesis due to virus infection remain to be discovered in plants. Major conclusions, solutions and achievements: We found that in the cucurbit family (cucumber, melon, squash, watermelon) there are 3-4 RDR1 genes not documented in other plant families. This important finding required a change in the emphasis of our objectives. We characterized 4 RDR1s in cucumber and 3 in melon. We demonstrated that in cucumber RDR1b is apparently a new broad spectrum virus resistance gene, independent of SA. In melon RDR1b is truncated, and therefore is assumed to be the reason that melon is highly susceptible to many viruses. RDR1c is dramatically induced due to DNA and RNA virus infection, and inhibition of RDR1c expression led to increased virus accumulation which suggested its important on gene silencing/defense mechanism. We show that induction of antiviral RNAi in Arabidopsis is associated with production of a genetically distinct class of virus-activated siRNAs (vasiRNAs) by RNA dependent RNA polymerase-1 targeting hundreds of host genes for RNA silencing by Argonaute-2. Production of vasiRNAs is induced by viruses from two different super groups of RNA virus families, targeted for inhibition by CMV, and correlated with virus resistance independently of viral siRNAs. We propose that antiviral RNAi activate broad-spectrum antiviral activity via widespread silencing of host genes directed by vasiRNAs, in addition to specific antiviral defense Implications both scientific and agricultural: The RDR1b (resistance) gene can now be used as a transcription marker for broad virus resistance. The discovery of vasiRNAs expands the repertoire of siRNAs and suggests that the siRNA-processing activity of Dicer proteins may play a more important role in the regulation of plant and animal gene expression than is currently known. We assume that precise screening of the vasiRNA host targets will lead in the near future for identification of plant genes associate with virus diseases and perhaps other pathogens.
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