Relevant bibliographies by topics / R3A2

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'R3A2'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "R3A2"

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Salim, Ramadan, Akshay Gundla, B. Shane Underwood, and Kamil E. Kaloush. "Effect of MSCR Percent Recovery on Performance of Polymer Modified Asphalt Mixtures." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 5 (April 8, 2019): 308–19. http://dx.doi.org/10.1177/0361198119841283.

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The AASHTO M332 specification includes a relationship between the non-recoverable creep compliance at 3.2 kPa ( Jnr3.2) and the percent of elastic recovery ( R3.2) from the multiple stress creep and recovery (MSCR) test. Justification for the exact position of this curve based on binder performance is largely undocumented in the technical literature as is the singular effect of higher or lower R3.2 values on mixture performance. In this study, nine binders were tested to evaluate the effect of R3.2 on the performance of asphalt mixtures. Binders with similar Jnr3.2 and varying MSCR R3.2 were divided into four groups based on their Jnr3.2 value. Comparisons were made based on results obtained from the dynamic modulus test, Hamburg wheel tracking test, and axial fatigue test. Based on these tests, it was shown that R3.2 had a strong relationship to the dynamic modulus of asphalt mixtures especially at intermediate and high temperatures. Binders with lower R3.2 had a higher dynamic modulus but showed no correlation to phase angle. Both modulus and phase angle of the mixture correlated to the binder shear modulus and phase angle. Binders with high R3.2 had a greater fatigue resistance and the effect is quite noticeable. However, R3.2 was shown to have little to no effect on the rutting resistance of the asphalt mixtures for the temperatures tested in this study. Finally, an alternative Jnr3.2 versus R3.2 relationship based on the results of this study is also presented.
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Cánovas-Márquez, José Tomás, Sebastian Falk, Francisco E. Nicolás, Subramanian Padmanabhan, Rubén Zapata-Pérez, Álvaro Sánchez-Ferrer, Eusebio Navarro, and Victoriano Garre. "A ribonuclease III involved in virulence of Mucorales fungi has evolved to cut exclusively single-stranded RNA." Nucleic Acids Research 49, no. 9 (April 20, 2021): 5294–307. http://dx.doi.org/10.1093/nar/gkab238.

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Abstract Members of the ribonuclease III (RNase III) family regulate gene expression by processing double-stranded RNA (dsRNA). This family includes eukaryotic Dicer and Drosha enzymes that generate small dsRNAs in the RNA interference (RNAi) pathway. The fungus Mucor lusitanicus, which causes the deadly infection mucormycosis, has a complex RNAi system encompassing a non-canonical RNAi pathway (NCRIP) that regulates virulence by degrading specific mRNAs. In this pathway, Dicer function is replaced by R3B2, an atypical class I RNase III, and small single-stranded RNAs (ssRNAs) are produced instead of small dsRNA as Dicer-dependent RNAi pathways. Here, we show that R3B2 forms a homodimer that binds to ssRNA and dsRNA molecules, but exclusively cuts ssRNA, in contrast to all known RNase III. The dsRNA cleavage inability stems from its unusual RNase III domain (RIIID) because its replacement by a canonical RIIID allows dsRNA processing. A crystal structure of R3B2 RIIID resembles canonical RIIIDs, despite the low sequence conservation. However, the groove that accommodates dsRNA in canonical RNases III is narrower in the R3B2 homodimer, suggesting that this feature could be responsible for the cleavage specificity for ssRNA. Conservation of this activity in R3B2 proteins from other mucormycosis-causing Mucorales fungi indicates an early evolutionary acquisition.
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Ding, De Feng, Shi Jie Liu, Chao Yu Zheng, Wen Sheng Yu, and Wu Chen. "Performance Comparison among Heat Pump Water Heaters Working with R32, R134a and the Mixture of R32/R134a." Advanced Materials Research 512-515 (May 2012): 1295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1295.

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A general air-source heat pump water heater originally designed to work with R134a was reconstructed as experimental rig for performance studies on systems using different refrigerants including R32, R134a and the mixture of R32/R134a which mass ratio is 1:5. Experimental results showed that the power consumption of the heat pump water heater charged individually with R32 would greatly exceed the system’s original pre-set maximum input power. When the leaving water temperature was increased from 18°C to 58°C, the average discharge temperature of the heat pump charged with R32/R134a mixture was 13.6% higher than that with R134a. The average power consumption of the heat pump with R134a was 253.5W less than that with R32/R134a mixture. However, the average COP (Coefficient of Performance) obtained by that with R32/R134a mixture was 0.83 higher than that with R134a.
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Doiphode, Pushpak, Vignesh Lakshmanan, and Indraneel Samanta. "Experimental and Numerical Study of Cooling Performance of Air Conditioner Using R32/CO2 Refrigerant Mixture." International Journal of Air-Conditioning and Refrigeration 27, no. 02 (June 2019): 1950019. http://dx.doi.org/10.1142/s2010132519500196.

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Conventional refrigerants such as chlorofluorocarbons and hydrochlorofluorocarbons have high values of global warming potential (GWP) and ozone depletion (ODP). HVAC&R engineers and designers are exploring alternate refrigerants having low ODP and GWP. At present, R32 refrigerant is being considered as an alternative to the conventional refrigerants in domestic air conditioners by many manufacturers and countries. This study analyzes the steady-state cooling performance of a split air conditioner using R32(CH2F2) and R32/CO2 (Carbon Dioxide) mixture having lower GWP. The performance of the air conditioner with R32 and four different compositions of R32/CO2 mixture is studied experimentally and numerically. A comparative analysis of performance characteristics such as cooling capacity, total energy consumption, energy efficiency, operating pressures and temperatures is presented in this study.
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Duran, Robert. "New shuttle vectors forRhodococcus sp. R312 (formerlyBrevibacterium sp. R312), a nitrile hydratase producing strain." Journal of Basic Microbiology 38, no. 2 (May 1998): 101–6. http://dx.doi.org/10.1002/(sici)1521-4028(199805)38:2<101::aid-jobm101>3.0.co;2-p.

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Segretin, María Eugenia, Marina Pais, Marina Franceschetti, Angela Chaparro-Garcia, Jorunn I. B. Bos, Mark J. Banfield, and Sophien Kamoun. "Single Amino Acid Mutations in the Potato Immune Receptor R3a Expand Response to Phytophthora Effectors." Molecular Plant-Microbe Interactions® 27, no. 7 (July 2014): 624–37. http://dx.doi.org/10.1094/mpmi-02-14-0040-r.

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Both plants and animals rely on nucleotide-binding domain and leucine-rich repeat-containing (NB-LRR or NLR) proteins to respond to invading pathogens and activate immune responses. How plant NB-LRR proteins respond to pathogens is poorly understood. We undertook a gain-of-function random mutagenesis screen of the potato NB-LRR immune receptor R3a to study how this protein responds to the effector protein AVR3a from the oomycete pathogen Phytophthora infestans. R3a response can be extended to the stealthy AVR3aEM isoform of the effector while retaining recognition of AVR3aKI. Each one of eight single amino acid mutations is sufficient to expand the R3a response to AVR3aEM and other AVR3a variants. These mutations occur across the R3a protein, from the N terminus to different regions of the LRR domain. Further characterization of these R3a mutants revealed that at least one of them was sensitized, exhibiting a stronger response than the wild-type R3a protein to AVR3aKI. Remarkably, the N336Y mutation, near the R3a nucleotide-binding pocket, conferred response to the effector protein PcAVR3a4 from the vegetable pathogen P. capsici. This work contributes to understanding how NB-LRR receptor specificity can be modulated. Together with knowledge of pathogen effector diversity, this strategy can be exploited to develop synthetic immune receptors.
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Zoteyeva, Nadezhda, Ilze Skrabule, Ieva Mežaka, Daiga Vilcāne, Guna Usele, and Nils Rostoks. "The impact of R1and R3a genes on tuber resistance to late blight of the potato breeding clones." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 70, no. 2 (April 1, 2016): 58–63. http://dx.doi.org/10.1515/prolas-2016-0010.

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Abstract Potato breeding clones were evaluated for resistance to late blight (agent Phytophthora infestans) using tuber inoculation tests and for presence of the resistance alleles of R1 and R3a genes in polymerase chain reaction tests. Among clones tested those expressing high, moderate and low resistance were identified. The data were analysed for the impact of R1 and R3a genes on tuber resistance to late blight in tested plant material. In previous evaluations performed on smaller amount of clones the tuber resistance levels significantly depended on presence/absence of the resistance allele of R3a gene and did not depend on presence of R1 gene allele. In the current study the statistical analyses did not prove the significant difference in resistance levels depending on presence of the resistance alleles, neither of R1 gene, nor of R3a gene. Tuber resistant clones bearing R3a gene resistance alleles still noticeably prevailed over the clones bearing the alleles of R1 gene as well as over the clones bearing the no resistance alleles of both genes. In several cases the resistance of clones with detected resistance allele of R1 gene was higher compared to those derived from the same crosses and showing amplification of the allele of R3a gene or those with no resistance alleles. Clones accumulating the resistance alleles of both (R1 and R3a) genes expressed high tuber resistance accompanied by necrotic reaction.
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Reszka-Blanco, Natalia J., Vijay Sivaraman, Liguo Zhang, and Lishan Su. "HIV-1 Env and Nef Cooperatively Contribute to Plasmacytoid Dendritic Cell Activation via CD4-Dependent Mechanisms." Journal of Virology 89, no. 15 (May 13, 2015): 7604–11. http://dx.doi.org/10.1128/jvi.00695-15.

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ABSTRACTPlasmacytoid dendritic cells (pDCs) are the major source of type I IFN (IFN-I) in response to human immunodeficiency virus type 1 (HIV-1) infection. pDCs are rapidly activated during HIV-1 infection and are implicated in reducing the early viral load, as well as contributing to HIV-1-induced pathogenesis. However, most cell-free HIV-1 isolates are inefficient in activating human pDCs, and the mechanisms of HIV-1 recognition by pDCs and pDC activation are not clearly defined. In this study, we report that two genetically similar HIV-1 variants (R3A and R3B) isolated from a rapid progressor differentially activated pDCs to produce alpha interferon (IFN-α). The highly pathogenic R3A efficiently activated pDCs to induce robust IFN-α production, while the less pathogenic R3B did not. The viral determinant for efficient pDC activation was mapped to the V1V2 region of R3A Env, which also correlated with enhanced CD4 binding activity. Furthermore, we showed that the Nef protein was also required for the activation of pDCs by R3A. Analysis of a panel of R3A Nef functional mutants demonstrated that Nef domains involved in CD4 downregulation were necessary for R3A to activate pDCs. Our data indicate that R3A-induced pDC activation depends on (i) the high affinity of R3A Env for binding the CD4 receptor and (ii) Nef activity, which is involved in CD4 downregulation. Our findings provide new insights into the mechanism by which HIV-1 induces IFN-α in pDCs, which contributes to pathogenesis.IMPORTANCEPlasmacytoid dendritic cells (pDCs) are the major type I interferon (IFN-I)-producing cells, and IFN-I actually contributes to pathogenesis during chronic viral infections. How HIV-1 activates pDCs and the roles of pDCs/IFN-I in HIV-1 pathogenesis remain unclear. We report here that the highly pathogenic HIV R3A efficiently activated pDCs to induce IFN-α production, while most HIV-1 isolates are inefficient in activating pDCs. We have discovered that R3A-induced pDC activation depends on (i) the high affinity of R3A Env for binding the CD4 receptor and (ii) Nef activity, which is involved in CD4 downregulation. Our findings thus provide new insights into the mechanism by which HIV-1 induces IFN-α in pDCs and contributes to HIV-1 pathogenesis. These novel findings will be of great interest to those working on the roles of IFN and pDCs in HIV-1 pathogenesis in general and on the interaction of HIV-1 with pDCs in particular.
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Elinder, Fredrik, Roope Männikkö, and H. Peter Larsson. "S4 Charges Move Close to Residues in the Pore Domain during Activation in a K Channel." Journal of General Physiology 118, no. 1 (July 1, 2001): 1–10. http://dx.doi.org/10.1085/jgp.118.1.1-a.

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Voltage-gated ion channels respond to changes in the transmembrane voltage by opening or closing their ion conducting pore. The positively charged fourth transmembrane segment (S4) has been identified as the main voltage sensor, but the mechanisms of coupling between the voltage sensor and the gates are still unknown. Obtaining information about the location and the exact motion of S4 is an important step toward an understanding of these coupling mechanisms. In previous studies we have shown that the extracellular end of S4 is located close to segment 5 (S5). The purpose of the present study is to estimate the location of S4 charges in both resting and activated states. We measured the modification rates by differently charged methanethiosulfonate regents of two residues in the extracellular end of S5 in the Shaker K channel (418C and 419C). When S4 moves to its activated state, the modification rate by the negatively charged sodium (2-sulfonatoethyl) methanethiosulfonate (MTSES−) increases significantly more than the modification rate by the positively charged [2-(trimethylammonium)ethyl] methanethiosulfonate, bromide (MTSET+). This indicates that the positive S4 charges are moving close to 418C and 419C in S5 during activation. Neutralization of the most external charge of S4 (R362), shows that R362 in its activated state electrostatically affects the environment at 418C by 19 mV. In contrast, R362 in its resting state has no effect on 418C. This suggests that, during activation of the channel, R362 moves from a position far away (&gt;20 Å) to a position close (8 Å) to 418C. Despite its close approach to E418, a residue shown to be important in slow inactivation, R362 has no effect on slow inactivation or the recovery from slow inactivation. This refutes previous models for slow inactivation with an electrostatic S4-to-gate coupling. Instead, we propose a model with an allosteric mechanism for the S4-to-gate coupling.
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Lambrechts, Christel, and Pierre Galzy. "Esterase Activities ofBrevihacteriumsp. R312 andBrevihacterium linens62." Bioscience, Biotechnology, and Biochemistry 59, no. 8 (January 1995): 1464–71. http://dx.doi.org/10.1271/bbb.59.1464.

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Dissertations / Theses on the topic "R3A2"

1

Armitage, Mark. "Cytogenetic damage, oncogenic transformation and p53 induction in human epithelial cells in response to irradiation." Thesis, University of St Andrews, 1994. http://hdl.handle.net/10023/13910.

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Ionizing radiation can have several different effects on cells, some are almost instantaneous such as the generation of DNA damage, other cellular responses take a matter of minutes or hours - DNA repair protein induction/activation, and others may take months or even years to be manifested - carcinogenesis. Human epithelial cell lines derived from both normal, non-neoplastic tissues and from a malignant source were cultured in order to examine several effects of ionizing radiation on such cell types. Cells not from a malignant source were previously immortalized by viral infection or by transfection with viral sequences. Simian virus 40 immortalised uroepithelial cells (SV-HUC) were found to be approximately a factor of two fold more radioresistant than cells of malignant origin (T24) in terms of unrepaired clastogenic damage i.e. assessment of micronuclei levels following irradiation. SV-HUC lines unlike T24 cells are non-tumourigenic when inoculated into nude athymic mice. SV-HUC lines proved very resistant to full oncogenic transformation using radiation and chemical carcinogens. However, morphological alterations and decreased anchorage dependant growth was observed in post carcinogen treated cells after appropriate cell culture conditions were utilized. The progression from this phenotype to a fully tumourigenic one was not recorded in this study. The ability of ionizing radiation to induce increased levels of the nuclear phosphoprotein p53 was also assessed using several different cell lines. SV- HUC and T24 cell lines failed to exhibit any increased p53 stabilization following irradiation. One cell line, a human papilloma virus transformed line (HPV) did show an approximate two fold increase of the wild type p53 protein after treatment with radiation. Only the cell line HPV showed any cell cycle delay, resulting in accumulation of cells in the G2/M compartment in post irradiation cell cycle analysis. The status of p53 was also assessed i.e. wild type or mutant conformation in all the above cells lines and two other control lines HOS (a human osteosarcoma cell line) and H Tori-3 (SV40 immortalised thyroid epithelial cells).
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FOURNAND, DAVID. "Utilisation de deux amidases de la souche rhodococcus sp. R312 pour la synthese d'acides hydroxamiques par bioconversion." Montpellier, ENSA, 1998. http://www.theses.fr/1998ENSA0017.

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Les acides hydroxamiques (rconhoh) sont des molecules a tres fort pouvoir de chelation et ont ete largement etudies en tant qu'inhibiteurs de metalloproteases, enzymes responsables d'un grand nombre de maladies a caractere cancereux. Certains acides hydroxamiques ont egalement ete utilises comme agents depolluants ou comme agents extracteurs de metaux. Ce travail presente une methode nouvelle de synthese de ces molecules, en utilisant l'activite de transfert d'acyles de deux amidases (acylamide amidohydrolases) de la souche bacterienne rhodococcus sp. R312 : l'amidase generale et l'amidase enantioselective. Dans un premier temps, quelques acides hydroxamiques ont ete synthetises par voie chimique afin de permettre la mise au point d'une methode spectrophotometrique de dosage de ces molecules, basee sur les proprietes de complexation des hydroxamates avec fe(iii). L'etude des activites de transfert (spectre de substrat, constantes cinetiques, mecanisme reactionnel, effets inhibiteurs, enantioselectivite, etc) de chacune des deux enzymes est ensuite presentee, et permet d'apporter des elements sur la connaissance des amidases microbiennes, en particulier sur la geometrie de leur site actif. L'amidase generale (structure homotetramerique) catalyse la synthese d'acides hydroxamiques aliphatiques a tres courte chaine carbonee (c#2-c#3), par transfert du groupement acyle d'un amide sur une molecule d'hydroxylamine. Elle est egalement capable de catalyser ce transfert sur une molecule d'hydrazine afin de former des hydrazides. Le mecanisme reactionnel est de type bi bi ping pong. L'amidase enantioselective (structure homodimerique) catalyse, suivant le meme mecanisme, la synthese d'une gamme beaucoup plus large d'acides hydroxamiques (aliphatiques de c#2 a c#6, -amines, aromatiques ou heterocycliques) et presentent une (s)-enantioselectivite vis-a-vis des substrats -substitues. Par contre, cette enzyme ne catalyse pas la synthese d'hydrazides. Enfin, des essais d'immobilisation de l'amidase generale sont egalement decrits.
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Rayburn, Brian Lee. "Base test method for gravity loaded standing seam roof systems." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03172010-020611/.

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Rancourt, James David. "Electrical properties of polyimides modified with metal salts." Diss., Virginia Tech, 1987. http://hdl.handle.net/10919/39288.

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Rao, Akshay R. "The impact of product familiarity on the price-perceived quality relationship." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/71176.

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This dissertation investigates the dissimilar use of price and intrinsic information in product quality assessments by differentially familiar buyers. Further, the impact of price and intrinsic information in evaluating monetary sacrifice, product value and purchase intention are examined. In particular, the impact of differing degrees of buyer familiarity with the product is hypothesized to affect the extent to which price or intrinsic information is used to assess product quality. A secondary set of hypotheses posits relationships between different cues used in value perceptions and manifestations of behavioral intention, depending on buyer familiarity with the product. Pre-experimental work was conducted to accomplish numerous objectives. First, it was necessary to identify a product which exhibited an objective quality-price association in the marketplace that would be used in the experiment. Second, price and intrinsic cue levels were established through pretests. Third, with the assistance of experts, a scale was developed to determine subject familiarity with the product. Based on refinements dictated by pre-experimental work, data were collected to examine the effects of price and intrinsic cues on perceptions of quality, sacrifice, value and willingness to buy, in a 4x2 between subjects factorial design. Subjects' familiarity with the product was assessed and, depending on their degree of familiarity, their responses were analyzed in one of three similar experiments. Data were collected using both magnitude and category scaling procedures. The degree to which variations in the independent variable resulted in variations in responses were compared for the three differentially familiar groups to assess support for the hypotheses. In general, there is a great deal of support for the primary hypotheses, suggesting that unfamiliar, moderately familiar and highly familiar buyers display different cue utilization strategies while assessing product quality. It is likely that all subjects not having the same value for money resulted in relatively weak support for the secondary hypotheses. The implications of the findings are discussed from the perspectives of conceptual, methodological and analytical advances as well as practitioner relevance. The limitations of the research effort are outlined as are potential areas of future research.
Ph. D.
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Reffali, Fatiha. "L'enseignement de l'histoire : tendances actuelles : situation marocaine et perspectives de rénovation." Master's thesis, Université Laval, 1986. http://hdl.handle.net/20.500.11794/29212.

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Ramachandran, Gurumurthy. "Computerized feedback control of an environmental chamber." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43278.

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Most existing environmental chambers cannot simulate dynamically changing environmental conditions. Hence there is a need for a dynamically controlled artificial environment for plant studies. This project demonstrates the control of temperature, humidity and SO₂ concentration in a Continuous Stirred Tank Reactor (CSTR) system using feedback control through a computer. An IBM-PC was connected to the measuring instrumentation and control equipment through a data acquisition and control system. Temperature and humidity were controlled by an ON-OFF control scheme. Sulfur dioxide concentration was controlled by means of a modified proportional derivative control algorithm. The system is capable of achieving a wide range of temperatures (7°C to 40°C), humidities (30% to 97%), and SO₂ concentrations. Temperature is maintained within ±0.5°C of the desired value and humidity is controlled within ±4% of the desired value. Sulfur dioxide concentration is kept within ±10% of the desired concentration. It was found that as humidity increases, the supply rate of SO₂ must be increased to maintain a given concentration. Software response time is slow. This causes time lags in the modification of the controlled parameters to achieve desired values. The heating and cooling characteristics of the system can be improved by better insulation of the chamber walls. The system demonstrates that computerized feedback control is practical for application to controlling environmental parameters in a fumigation chamber.
Master of Science
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8

Rajarathnam, Ramkumar. "A computer-aided graphic design tool for minimum weight inductors in switching converters." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45912.

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A computer-aided design procedure has been developed to determine the minimum weight design solutions, for singly wound EE- and EI-cored inductors that perform the functions of energy storage and transfer in switching DC·DC power converters. Three converter topologies, namely the Buck, the Boost, and the Buck/Boost have been considered in implementing the closed form Lagrange Multiplier-based solution to the design problem.

A notable feature is the interactive use of design graphs to facilitate a trade-off study between the weight of the inductor, the total losses in the inductor and the peak current stress in the switching transistor and diode. Thus useful insight is obtained by bringing aspects of converter design into view. Practical core and magnetic material data from manufacturerâ s catalogs can be specified and the design optimized for the minimal weight.


Master of Science
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9

Coquelet, Christophe. "Etude des fluides frigorigéniques : mesures et modélisations." Paris, ENMP, 2003. https://pastel.archives-ouvertes.fr/pastel-00000991.

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Régnière, Sophie. "Une union proclamée au ciel : nature et obligations du mariage selon la doctrine juive traditionnelle." Master's thesis, Université Laval, 2000. http://hdl.handle.net/20.500.11794/51467.

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"Cette recherche traite de l’étude de la nature et des obligations du mariage juif àpartir d’un point de doctrine traditionnelle du Talmud de Babylone voulant que D’ieu aituni l’homme et la femme quarante jours avant leur stade embryonnaire. S’ensuit uneséparation nécessaire de ces âmes dans leur vie terrestre avant de renouer contact par lemariage, appelé kiddushin, impliquant une union par et avec D’ieu. Cette sanctification,le mariage, répond à deux buts précis : la compagnie et la procréation.Une attention particulière sera portée au .écit du tout premier mariage de laCréation : celui de Adam et de Hava. Il est impossible de passer sous silence le récit de lacréation de la femme, puisque l’existence même des kiddushin en fut conditionnée. Noussituerons la place et l’influence que la femme peut avoir au sein du mariage, ainsi que lesqualités morales que doit rechercher un homme chez une femme."
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Books on the topic "R3A2"

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Corporation, Asian Community Development. Oak terrace: tax credit/subsidy layering review. 1992.

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Ground Vehicle Aerodynamics With Applications R392. SAE International, 2012.

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Antill. America Catches on to Aquaculture (R362). Chronicle Guidance Pubns Inc, 1988.

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Cox, Ross. Volkswagen R32: Official Factory Repair Manual. Bentley Publishers, 2006.

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South Cove YMCA. Facilities Committee. South cove ymca development packet, site r3/r3a. 1988.

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Corp, Asian Community Development. Development proposal for the site of parcel r3-r3a, Boston, ma. 1988.

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E, Schwarzberg, Gao X, and National Institute of Standards and Technology (U.S.), eds. Experimental thermal conductivity values for mixtures of R32, R125, R134a, and propane. Boulder, Colo: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1999.

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E, Schwarzberg, Gao X, and National Institute of Standards and Technology (U.S.), eds. Experimental thermal conductivity values for mixtures of R32, R125, R134a, and propane. Boulder, Colo: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1999.

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E, Schwarzberg, Gao X, and National Institute of Standards and Technology (U.S.), eds. Experimental thermal conductivity values for mixtures of R32, R125, R134a, and propane. Boulder, Colo: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1999.

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Chinese Economic Development Council, Inc. Mei wah village: a new housing proposal for Boston's chinatown parcel r3/r3a. 1988.

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Book chapters on the topic "R3A2"

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Zhao, Deyin, Wenhong Ju, Zhangquan Chen, and Xu Zhang. "Research on the Character of Discharge Temperature of Air Conditioning System with R32." In Lecture Notes in Electrical Engineering, 635–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39581-9_62.

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Herbert, Sir Henry. "R32." In The Control and Censorship of Caroline Drama: The Records of Sir Henry Herbert, Master of the Revels 1623–73, edited by N. W. Bawcutt. Oxford University Press, 1996. http://dx.doi.org/10.1093/oseo/instance.00031306.

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Le Goff, Olivier. "Annexe. Le confort du R312." In L’Invention du confort, 213–15. Presses universitaires de Lyon, 1994. http://dx.doi.org/10.4000/books.pul.9503.

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"R32. Raymundus Lullus (Ramon Llull), 1232–1315." In Lateinische Dialoge 1200-1400, 416–70. BRILL, 2007. http://dx.doi.org/10.1163/ej.9789004160330.i-826.129.

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Zhou, Yanrui, and Xiaoman Guan. "Research on heat source transformation of radiator heating system using R32 air-cooled heat-pump unit." In Advances in Energy Equipment Science and Engineering, 2479–82. CRC Press, 2015. http://dx.doi.org/10.1201/b19126-478.

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Cremaschi, L., X. Wu, A. Biswas, and P. Deokar. "Experimental study of compressor operating characteristics and performance when using refrigerants R32, R1234yf, and two new low GWP developmental refrigerants as drop-in replacements for R410A." In 8th International Conference on Compressors and their Systems, 57–66. Elsevier, 2013. http://dx.doi.org/10.1533/9781782421702.2.57.

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Conference papers on the topic "R3A2"

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Gusat, M., D. Crisan, C. Minkenberg, and C. DeCusatis. "R3C2: Reactive Route and Rate Control for CEE." In 2010 IEEE 18th Annual Symposium on High-Performance Interconnects (HOTI). IEEE, 2010. http://dx.doi.org/10.1109/hoti.2010.17.

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Kim, Hyeon-Ju, Ho-Saeng Lee, Young-Kwon Jung, Sang-Won Cha, and Deok-Soo Moon. "Design, Fabrication, and Performance Test of R32-OTEC Pilot Plant." In ASME 2014 8th International Conference on Energy Sustainability collocated with the ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/es2014-6422.

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In this paper, we present the results of the design, fabrication, installation, and operation of a 20-kW OTEC (ocean thermal energy conversion) pilot plant. The results can be used as basic data for the design of commercial plants with capacities in excess of 40 MW. To perform an experiment on the 20 kW OTEC, a closed OTEC cycle was designed and fabricated at the Ocean Water Plant Research Center. The cycle utilizes surface ocean water as its heat source and deep ocean water as its heat sink. R32 (Difluoromethane, CH2F2) was used as the working fluid, and the temperature of the heat source and heat sink were 26°C and 5°C, respectively. A semi-welded-type heat exchanger was used as the evaporator and condenser, and the OTEC cycle was designed for a gross power of 20 kW. The advantages of the semi-welded-type heat exchanger include easy maintenance of the gasket-type heat exchanger and the rare leakage of the welded-type heat exchanger. The plate arrangement of the semi-welded-type heat exchanger comprised one welded channel for the working fluid and another gasket-type channel. The gross power of the turbine was determined to be 20.49 kW. The evaporating capacity was calculated as 1,020 kW, and the cycle efficiency was determined to be about 2.00%.
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Giriprasath, B. S., R. Chandramohan, R. Ajith Kumar, and N. K. Arun. "Energy enhancement of air conditioner using R32 and R290 refrigerants." In PROCEEDINGS OF THE 14TH ASIA-PACIFIC PHYSICS CONFERENCE. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0036221.

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Miyara, Akio, Hasan M. M. Afroz, and Md Anowar Hossain. "In-tube Condensation of Low GWP Mixture Refrigerants R1234ze(E)/R32." In The 15th International Heat Transfer Conference. Connecticut: Begellhouse, 2014. http://dx.doi.org/10.1615/ihtc15.cds.009602.

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Bhusari, Sanjyot, and S. Sherif. "Theoretical Analysis of R32/R124 Refrigerant Mixture as an Alternative to R22." In 1st International Energy Conversion Engineering Conference (IECEC). Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-6028.

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Wang, Ying, Fang Wang, Hongqun Chen, Fang Li, and Siyu Li. "Application of Environmental Friendly Material R32/R1234ze in Heat Pump Water Heater." In International Symposium on Mechanical Engineering and Material Science (ismems-16). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ismems-16.2016.71.

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Wang, Linlin, Chaobin Dang, and Eiji Hihara. "Study on Condensation Heat Transfer Characteristics of Nonazeotropic Binary Refrigerant Mixture R1234yf/R32 Inside Small-Scale Horizontal Smooth Tubes." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17784.

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In this study, condensation heat transfer characteristics of nonazeotropic mixtures R1234yf and R32 (mass fractions of 0.52:0.48 and 0.77:0.23, respectively) inside a horizontal smooth tube (inner diameter 2 mm) were experimentally investigated at mass fluxes ranging from 100 to 400 kg/m2 s and at a saturation temperature of 40 °C. A prediction model using a modified heat transfer correlation for pure refrigerant was constructed, the details of which are presented here. The heat transfer characteristics, especially the heat transfer deterioration caused by the mass transfer difference of the nonazeotropic refrigerant mixture, were evaluated by combining the correlations of heat transfer and mass transfer on both the vapor side and the liquid side. Through comparison with experimental data, the obtained prediction results were found to agree reasonably with the experimental condensation heat transfer coefficient of binary refrigerant mixtures using R1234yf and R32.
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Chen, Huijuan, D. Yogi Goswami, Muhammad M. Rahman, and Elias K. Stefanakos. "Optimizing Energy Conversion Using Organic Rankine Cycles and Supercritical Rankine Cycles." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54608.

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The optimization of energy conversion systems is of great significance in the utilization of low-grade heat. This paper presents an analysis of 6 working fluids in 12 thermodynamic cycles to optimize the energy conversion systems. The optimal exergy efficiency of the system is dependent on the type of the thermodynamic cycle, the choice of appropriate working fluid, and the working conditions. A zeotropic mixture of R134a and R245fa shows advantages in energy conversion process, as well as its heat exchange with the heat source and heat sink. The exergy efficiency of a 0.5R134a/0.5R245fa-based supercritical Rankine cycle system is 0.643–0.689 for a turbine inlet temperature of 415–445K, which is about 30% improvement over the exergy efficiency of 0.491–0.521 for a pure R32-based organic Rankine cycle under the same temperature limits. Furthermore, the 0.5R134a/0.5R245fa mixture saves more than 60% of the cooling water during the condensation process than the pure R32, R134a and R245fa.
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Yang, Jaewan, DongChan Lee, and Yongchan Kim. "Experimental Study on Evaporation Heat Transfer Characteristicsof R32 in A Plate Heat Exchanger." In The 6th World Congress on Momentum, Heat and Mass Transfer. Avestia Publishing, 2021. http://dx.doi.org/10.11159/icmfht21.lx.106.

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Tulio Gama da Silva, Marco, David Marcucci, ENIO BANDARRA FILHO, Daniel Dall Onder dos Santos, and Arthur Antunes. "EXPERIMENTAL EVALUATION OF PERFORMANCE OF R32 AS A SUBSTITUTE FOR R410A IN COOLING SYSTEMS." In Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2018. http://dx.doi.org/10.26678/abcm.encit2018.cit18-0306.

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Reports on the topic "R3A2"

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Gao, X. Experimental thermal conductivity values for mixtures of R32, R125, R134a, and propane. Gaithersburg, MD: National Institute of Standards and Technology, 1999. http://dx.doi.org/10.6028/nist.ir.5093.

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Shrestha, Som S., Vishaldeep Sharma, and Omar Abdelaziz. Compressor Calorimeter Test of R-404A Alternatives ARM-31a, D2Y-65, L-40, and R32 + R-134a Mixture using a Scroll Compressor. Office of Scientific and Technical Information (OSTI), August 2013. http://dx.doi.org/10.2172/1089777.

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