Bibliographies thématiques / Tvcv

Littérature scientifique sur le sujet « Tvcv »

Auteur : Grafiati
Publié le 11 mars 2023

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Articles de revues sur le sujet "Tvcv"

1

Lockhart, Benham E., Axelina S. Swenson, Neil E. Olszewski et Peter Voth. « Characterization of a Strain of Turnip vein-clearing virus Causing Red Ringspot of Penstemon ». Plant Disease 92, no 5 (mai 2008) : 725–29. http://dx.doi.org/10.1094/pdis-92-5-0725.

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A disease of penstemon (Penstemon digitalis) occurring in commercial nurseries in Minnesota in 2004 to 2006 and characterized by red foliar ringspots, leaf deformation, and plant stunting was found to be caused by a strain of Turnip vein-clearing virus (TVCV) that was named Penstemon ringspot virus (PenRSV). This is the first report of a viral disease of penstemon. The genome organization of PenRSV was similar to that of the crucifer-infecting tobamoviruses. The nucleotide sequence of PenRSV was almost identical (99%) to that of TVCV, but the two viruses differed importantly in host range and symptoms induced. The only sequence difference between PenRSV and TVCV occurred at the 3′ end of open reading frame I, where the amino acid sequence FRDSNL in TVCV is replaced by FRGQQL in PenRSV. The experimental host range of PenRSV included species in the families Brassicaceae (Cruciferae), Cactaceae, Cucurbitaceae, Leguminosae, Malvaceae, and Solanaceae. This virus poses a potential threat to commercial nursery and bedding plant production because of its wide host range and because it will escape detection by immunoenzymatic screening procedures for tobamoviruses based on use of antibodies to Tobacco mosaic virus (TMV).
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Wong, Chui Eng, Rachael A. J. Carson et John P. Carr. « Chemically Induced Virus Resistance in Arabidopsis thaliana Is Independent of Pathogenesis-Related Protein Expression and the NPR1 Gene ». Molecular Plant-Microbe Interactions® 15, no 1 (janvier 2002) : 75–81. http://dx.doi.org/10.1094/mpmi.2002.15.1.75.

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Salicylic acid (SA) treatment triggers inhibition of replication or movement of several positive-sense RNA plant viruses in tobacco. This resistance can also be stimulated by nonlethal concentrations of cyanide and antimycin A (AA) without triggering induction of pathogenesis-related PR-1 protein genes. In two ecotypes of Arabidopsis thaliana (Columbia and Nössen), SA-induced resistance to a tobamovirus, Turnip vein clearing virus (TVCV), was also induced by nonlethal concentrations of cyanide and AA without concomitant induction of PR-1 gene expression. Furthermore, chemically induced resistance to TVCV, as well as the induction of the plant mitochondrial alternative oxidase (a potential target for the chemicals), was independent of NPR1, a gene that plays a key role downstream of SA in the induction of PR proteins. The chemically induced resistance to TVCV appeared to be due to inhibition of replication at the site of inoculation. Taken together, these results show that in Arabidopsis, as in tobacco, resistance to viruses can be induced via a distinct branch of the defensive signal transduction pathway. This suggests that the existence of this virus-specific branch may be widespread among plants.
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Lockhart, Ben, Dimitre Mollov, Shauna Mason et Sara Bratsch. « First Report of Turnip vein-clearing virus in Garlic Mustard (Alliaria petiolata) in the United States ». Plant Health Progress 15, no 4 (janvier 2014) : 157–58. http://dx.doi.org/10.1094/php-br-14-0029.

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The objective of the study was to establish the identity of a tobamo-like virus occurring naturally in garlic mustard in Minnesota, and to determine its role in the etiology of the disease. This is the first report of TVCV infection in garlic mustard. Accepted 18 September 2014. Published 14 October 2014.
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Cuellar, Wilmer J., Joao De Souza, Israel Barrantes, Segundo Fuentes et Jan F. Kreuze. « Distinct cavemoviruses interact synergistically with sweet potato chlorotic stunt virus (genus Crinivirus) in cultivated sweet potato ». Journal of General Virology 92, no 5 (1 mai 2011) : 1233–43. http://dx.doi.org/10.1099/vir.0.029975-0.

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Two serologically unrelated sweet potato viruses causing symptoms of vein clearing in the indicator plant Ipomoea setosa were isolated and their genomes have been sequenced. They are associated with symptomless infections in sweet potato but distinct vein-clearing symptoms and higher virus titres were observed when these viruses co-infected with sweet potato chlorotic stunt virus (SPCSV), a virus that is distributed worldwide and is a mediator of severe virus diseases in this crop. Molecular characterization and phylogenetic analysis revealed an overall nucleotide identity of 47.6 % and an arrangement of the movement protein and coat protein domains characteristic of members of the genus Cavemovirus, in the family Caulimoviridae. We detected both cavemoviruses in cultivated sweet potato from East Africa, Central America and the Caribbean islands, but not in samples from South America. One of the viruses characterized showed a similar genome organization as, and formed a phylogenetic sublineage with, tobacco vein clearing virus (TVCV), giving further support to the previously suggested separation of TVCV, and related viral sequences, into a new caulimovirid genus. Given their geographical distribution and previous reports of similar but yet unidentified viruses, sweet potato cavemoviruses may co-occur with SPCSV more often than previously thought and they could therefore contribute to the extensive yield losses and cultivar decline caused by mixed viral infections in sweet potato.
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Cardin, L., B. Delecolle et B. Moury. « First Report of Cucumber mosaic virus and Turnip vein-clearing virus in Dichondra repens in France, Italy, and China ». Plant Disease 93, no 2 (février 2009) : 201. http://dx.doi.org/10.1094/pdis-93-2-0201b.

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During surveys of Dichondra repens (kidneyweed, family Convolvulaceae) turfs in public gardens of the Franco-Italian Riviera from 1993 to 2003, leaf mosaic and yellow ringspot symptoms have been observed in Antibes, Menton, Nice, and Vallauris (France) and San Remo and La Mortola (Italy). Isolates from these six locations and from two locations in China (Shanghai and Kunming) have revealed the presence of Cucumber mosaic virus (CMV) based on the behavior of a range of manually inoculated plants (1), the observation of 30 nm isometric particles in semipurified extracts of inoculated Nicotiana tabacum ‘Xanthi’ plants with the electron microscope, and positive reactions in double antibody sandwich (DAS)-ELISAs with specific polyclonal antibodies. All isolates were shown to belong to group II of CMV isolates (3) by double-immunodiffusion analysis. CMV was previously identified in D. repens in California in 1972 (4). Following isolation from local lesions on Vigna unguiculata and multiplication in ‘Xanthi’ tobacco plants, two of the isolates were used to inoculate seedlings of D. repens manually or by Aphis gossypii aphids. Two months later, all inoculated plants showed symptoms similar to those previously observed and were positive in DAS-ELISA. In 2000, a D. repens sample collected in Antibes showing similar symptoms as above, induced necrotic local lesions in inoculated ‘Xanthi’ plants in 48 h, followed by systemic mosaic symptoms typical of CMV, therefore revealing the presence of a second virus. That virus was separated from CMV in apical, noninoculated leaves of Chenopodium quinoa and then used to inoculate a range of test plants. It was infectious in most plants of the families Solanaceae (including Cyphomandra betacea) and Brassicaceae, together with in Chenopodium amaranticolor, C. quinoa, Claytonia perfoliata, Convolvulus spp. ‘Belle de jour’, Digitalis purpurea, Gomphrena globosa, Ocimum basilicum, Plantago lanceolata, and Valerianella olitoria. It induced asymptomatic systemic infections in D. repens. Numerous, rod-shaped, 300 nm long particles were observed in sap extracts of infected plants with the electron microscope, suggesting the presence of a tobamovirus. A set of primers polyvalent for tobamoviruses (2) allowed the amplification of a DNA product of approximately 800 bp through reverse transcription-PCR performed with total RNA extracts from inoculated ‘Xanthi’ plants. The DNA product was cloned and sequenced (GenBank Accession No. EU927306) revealing that the virus belonged to a tobamovirus lineage including Ribgrass mosaic virus and viruses infecting cruciferous plants (Turnip vein-clearing virus [TVCV] and Youcai mosaic virus) and was closest to TVCV (95% amino acid identity; GenBank Accession No. NC_001873). To our knowledge, this is the first report of TVCV in D. repens. References: (1) L. Cardin et al. Plant Dis. 87:200, 2003. (2) A. Gibbs et al. J. Virol. Methods 74:67, 1998. (3) M. J. Roossinck. J. Virol. 76:3382, 2002. (4) L. G. Weathers and D. J. Gumpf. Plant Dis. Rep. 56:27, 1972.
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Gyula, Péter, Tamás Tóth, Teréz Gorcsa, Tünde Nyikó, Anita Sós-Hegedűs et György Szittya. « Ecotype-specific blockage of tasiARF production by two different RNA viruses in Arabidopsis ». PLOS ONE 17, no 10 (5 octobre 2022) : e0275588. http://dx.doi.org/10.1371/journal.pone.0275588.

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Arabidopsis thaliana is one of the most studied model organisms of plant biology with hundreds of geographical variants called ecotypes. One might expect that this enormous genetic variety could result in differential response to pathogens. Indeed, we observed previously that the Bur ecotype develops much more severe symptoms (upward curling leaves and wavy leaf margins) upon infection with two positive-strand RNA viruses of different families (turnip vein-clearing virus, TVCV, and turnip mosaic virus, TuMV). To find the genes potentially responsible for the ecotype-specific response, we performed a differential expression analysis of the mRNA and sRNA pools of TVCV and TuMV-infected Bur and Col plants along with the corresponding mock controls. We focused on the genes and sRNAs that showed an induced or reduced expression selectively in the Bur virus samples in both virus series. We found that the two ecotypes respond to the viral infection differently, yet both viruses selectively block the production of the TAS3-derived small RNA specimen called tasiARF only in the virus-infected Bur plants. The tasiARF normally forms a gradient through the adaxial and abaxial parts of the leaf (being more abundant in the adaxial part) and post-transcriptionally regulates ARF4, a major leaf polarity determinant in plants. The lack of tasiARF-mediated silencing could lead to an ectopically expressed ARF4 in the adaxial part of the leaf where the misregulation of auxin-dependent signaling would result in an irregular growth of the leaf blade manifesting as upward curling leaf and wavy leaf margin. QTL mapping using Recombinant Inbred Lines (RILs) suggests that the observed symptoms are the result of a multigenic interaction that allows the symptoms to develop only in the Bur ecotype. The particular nature of genetic differences leading to the ecotype-specific symptoms remains obscure and needs further study.
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Lartey, Robert T., Soumitra Ghoshroy et Vitaly Citovsky. « Identification of an Arabidopsis thaliana Mutation (vsm1) That Restricts Systemic Movement of Tobamoviruses ». Molecular Plant-Microbe Interactions® 11, no 7 (juillet 1998) : 706–9. http://dx.doi.org/10.1094/mpmi.1998.11.7.706.

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Following inoculation, many plant viruses spread locally from cell to cell until they reach the vascular system, through which they then move to other parts of the plant, resulting in systemic infection. To isolate host genes involved in systemic transport of plant viruses, ethyl methanesulfonate-mutagenized Arabidopsis thaliana plants were screened for significant delays in the systemic movement of turnip vein clearing virus (TCVC). One such mutant, designated vsm1 (virus systemic movement), was identified. Unlike the wild-type plants, vsm1 did not develop viral disease and did not allow the systemic spread of the virus. The local viral movement within the inoculated vsm1 leaves, however, was not affected. TVCV systemic movement within the vsm1 plants was likely blocked at the step of viral entry into the host plant vasculature from the infected leaf tissue. vsm1 plants also restricted the systemic movement of another tobamovirus but not of an unrelated carmovirus.
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Kim, Michelle, Madhava Aryal, Benjamin Rosen, Hemant Parmar, Daekeun You, Larry Junck, Denise Leung et al. « NEIM-08 A PHASE II STUDY OF MULTIPARAMETRIC MR-GUIDED HIGH DOSE ADAPTIVE RADIOTHERAPY WITH CONCURRENT TEMOZOLOMIDE IN PATIENTS WITH NEWLY DIAGNOSED GLIOBLASTOMA ». Neuro-Oncology Advances 4, Supplement_1 (1 août 2022) : i19. http://dx.doi.org/10.1093/noajnl/vdac078.075.

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Abstract BACKGROUND Biologically-informed radiotherapy (RT) targeting an adversely prognostic hypercellular/hyperperfused imaging phenotype in patients with newly diagnosed glioblastoma (GBM) may improve outcomes by identifying emerging regions of treatment resistance associated with survival (OS), and is under investigation as a target for individualized, adaptive RT in an ongoing Phase II trial (NCT04574856). METHODS In this single-arm study, patients with newly diagnosed GBM following resection undergo dose-intensified chemoRT targeting the residual hypercellular (TVHCV, mean contralateral normal brain+2SD) and hyperperfused tumor volume (TVCBV, contralateral normal frontal grey matter+1SD) identified using high b-value diffusion-weighted and dynamic contrast-enhanced perfusion MRI. TVHCV/TVCBV is treated to 50 Gy in 20 fractions (2.5 Gy/fraction), and following mid-RT reassessment, the persistent and developing TVHCV/TVCBV is treated to 30 Gy in 10 fractions (3 Gy/fraction). The primary endpoint is improvement in OS, with planned interim safety analysis. RESULTS Since October 2020, 16 of 30 patients have been enrolled. Median age was 58 years (range, 29-75) and 69% were male. No patient underwent biopsy, and 50% had gross total resection; 23% had MGMT methylated tumors, and all except 2 were IDHwt. Median TVHCV/TVCBV was 6.9 cc (range, 1.9-42.8) pre-RT and 30% (range, 1-72%) was nonenhancing. By mid-RT, TVHCV/TVCBV was reduced to 4.2 cc (range, 0.8-34.3) and 47% (range, 3-74%) was nonenhancing. The TVHCV/TVCBV persisting from pre- to mid-RT was 2.3 cc (range, 0-24.2), with an additional 1.8 cc (range, 0.3-20.6) newly developing outside of the initial region. All patients underwent adaptive replanning for boost without interruption. Planned interim analysis determined an acceptable rate of neurologic toxicity and safety to continue enrollment. CONCLUSION Individualized, adaptive radiotherapy using an advanced imaging biomarker to assess emerging and especially non-enhancing regions of treatment resistance in patients with GBM is feasible, with short term safety in an early cohort and longer-term efficacy outcomes anticipated with ongoing accrual.
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Kim, Michelle M., Madhava P. Aryal, Yilun Sun, Hemant A. Parmar, Pin Li, Matthew Schipper, Daniel R. Wahl, Theodore S. Lawrence et Yue Cao. « Response assessment during chemoradiation using a hypercellular/hyperperfused imaging phenotype predicts survival in patients with newly diagnosed glioblastoma ». Neuro-Oncology 23, no 9 (18 février 2021) : 1537–46. http://dx.doi.org/10.1093/neuonc/noab038.

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Abstract Background Adversely prognostic hypercellular and hyperperfused regions of glioblastoma (GBM) predict progression-free survival, and are a novel target for dose-intensified chemoradiation (chemoRT) recently implemented in a phase II clinical trial. As a secondary aim, we hypothesized that dose-intensified chemoRT would induce greater mid-treatment response of hypercellular/hyperperfused tumor regions vs standard chemoradiation, and that early response would improve overall survival (OS). Methods Forty-nine patients with newly diagnosed GBM underwent prospective, multiparametric high b value diffusion-weighted MRI (DW-MRI) and perfusion dynamic contrast-enhanced MRI (DCE-MRI) pre-RT and 3-4 weeks into RT. The hypercellular tumor volume (TVHCV, mean contralateral normal brain + 2SD) and hyperperfused tumor volume (TVCBV, contralateral normal frontal gray matter + 1SD) were generated using automated thresholding. Twenty-six patients were enrolled on a dose-escalation trial targeting TVHCV/TVCBV with 75 Gy in 30 fractions, and 23 non-trial patients comprised the control group. OS was estimated using the Kaplan-Meier method and compared using the log-rank test. The effect of TVHCV/TVCBV and Gd-enhanced tumor volume on OS was assessed using multivariable Cox proportional-hazard regression. Results Most patients had gross total (47%) or subtotal resection (37%), 25% were MGMT-methylated. Patients treated on the dose-escalation trial had significantly greater reduction in TVHCV/TVCBV (41% reduction, IQR 17%-75%) vs non-trial patients (6% reduction, IQR 6%-22%, P = .002). An increase in TVHCV/TVCBV during chemoRT was associated with worse OS (adjusted hazard ratio [aHR] 1.2, 95%CI 1.0-1.4, P = .02), while pre-treatment tumor volumes (P > .5) and changes in Gd-enhanced volume (P = .9) were not. Conclusions Multiparametric MRI permits identification of therapeutic resistance during chemoRT and supports adaptive strategies in future trials.
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Surya Narayanan, Subramanian, et Parammasivam K.M. « A review of computational studies on trapped vortex combustors for gas turbine applications ». Aircraft Engineering and Aerospace Technology 95, no 4 (20 octobre 2022) : 658–67. http://dx.doi.org/10.1108/aeat-12-2021-0366.

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Purpose The purpose of this paper is to comprehensively evaluate the progress in the development of trapped vortex combustors (TVCs) in the past three decades. The review aims to identify the needs, predict the scope and discuss the challenges of numerical simulations in TVCs applied to gas turbines. Design/methodology/approach TVC is an emerging combustion technology for achieving low emissions in gas turbine combustors. The overall operation of such TVCs can be on very lean mixture ratio and hence it helps in achieving high combustion efficiency and low overall emission levels. This review introduces the TVC concept and the evolution of this technology in the past three decades. Various geometries that were explored in TVC research are listed and their operating principles are explained. The review then categorically arranges the progress in computational studies applied to TVCs. Findings Analyzing extensive literature on TVCs the review discusses results of numerical simulations of various TVC geometries. Numerical simulations that were used to optimize TVC geometry and to enhance mixing are discussed. Reactive flow studies to comprehend flame stability and emission characteristics are then listed for different TVC geometries. Originality/value To the best of the authors’ knowledge, this review is the first of its kind to discuss extensively the computational progress in TVC development specific to gas turbine engines. Earlier review on TVC covers a wide variety of applications including land-based gas turbines, supersonic Ramjets, incinerators and hence compromise on the depth of analysis given to gas turbine engine applications. This review also comprehensively group the numerical studies based on geometry, flow and operating conditions.
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Thèses sur le sujet "Tvcv"

1

Dreos, Rene'. « Studio della risposta compatibile di nicotina benthamiana al turnip vein-clearing virus (TVCV) ». Doctoral thesis, Università degli studi di Trieste, 2008. http://hdl.handle.net/10077/2611.

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2006/2007
In agricoltura, la monocoltura su vaste aree geografiche puo' portare ad una rapida diffusione di malattie. D'altro canto, l'uso di composti chimici per controllarne la diffusione puo' causare seri problemi di inquinamento e aumentare i costi di produzione. Uno studio dettagliato delle interazioni pianta-patogeno puo' contribuire a fornire soluzioni sostenibili per il controllo delle malattie che colpiscono le specie coltivate. Per queste ragioni lo scopo principale di questa tesi e' stato lo studio delle prime fasi della risposta di N. benthamiana, una pianata appartenente alla famiglia delle Solanaceae, all'infezione da parte del Turnip Vein-Clearing Virus (TVCV). Per farlo e' stato messo a punto un metodo di infezione indiretto che sfrutta la capacita' di Agrobacterium di inserire un frammento di DNA esogeno nel genoma della pianta. In questo modo la percentuale di cellule infettate ha raggiunto il 90% sul totale delle cellule del tessuto. L'analisi del profilo di espressione genica e' stata effettuata mediante l'utilizzo di una nuova piattaforma microarray contenente circa 6000 sequenze specifiche di N. benthamiana. Le ibridazioni sono state eseguite durante il periodo in cui il genoma virale aumenta la propria concentrazione all'interno della cellula fino a raggiungere il valore massimo. Complessivamente sono state fatte 30 ibridazioni con il microarray. La determinazione della concentrazione del genioma virale e' stata effettuata con l'uso della tecnica della PCR quantitativa per la quale e' stato sviluppato un nuovo metodo di analisi dei dati. I risultati delle ibridazioni dimostrano che la risposta della pinata all'infezione virale e' caratterizzata dalla presenza di due fasi distinte. Nella prima e' presente un picco di risposta durante le prime fasi dell'esperimento, quando il genoma virale non ha ancora raggiunto la fase di crescita esponenziale. La seconda, invece, coincide con il massimo della concentrazione virale all'interno delle cellule. Analisi approfondite dei geni attivati nelle due fasi lasciano ipotizzare la presenza di due risposte differenti, la prima rivolta verso Agrobacterium mentre la seconda rivolta verso l'infezione virale. Questo lavoro e' stato svolto in parte presso il laboratorio di Genetica dell'Universita' degli Studi di Trieste sotto la supervisione del Prof. Alberto Pallavicini ed in parte nel laboratorio del Prof. Andy Maule, Disease and Stress Biology, John Innes Centre, UK.
XX Ciclo
1979
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2

Gardner, Steven R. « Erosion effects on TVC vane heat transfer characteristics ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA282006.

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Thesis (M.S. in Mechanical Engineering) Naval Postgraduate School, March 1994.
Thesis advisor(s): Morris Driels. "March 1994." Includes bibliographical references. Also available online. Mode of access: World Wide Web. System requirements: Adobe Acrobat Reader.
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3

Ponomarev, Dmitry. « Enhancing the design transfer process within ENOVIA V6/TVC ». Thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-163521.

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Aktuell forskning undersöker befintliga vägar och metoder för att översätta produktrelaterad designinformation till de uppgifter som krävs för snabb och outtröttlig inrättandet av tillverkningsprocesser inom två specifika software produkter - ENOVIA V6 och Technia Value Components (TVC). Studien ser också över de potentiellt möjliga förbättringar för dessa verktyg, som kan påskynda relevanta affärsprocesser och göra dem mer konfigurerbara och flexibla. Följande mål har fastställts: 1) Göra en analys av nuvarande kapacitet gällande verktygen ENOVIA och TVC inom området design av överföring; 2) Genomföra en litteraturstudie av senaste forskningsmaterial med anknytning till design av överföring; 3) Undersöka nuvarande behov hos företag som använder programvaran ovan; 4) Föreslå lösningar och motsvarande datamodeller som gör det möjligt att öka den befintliga funktionaliteten hos ENOVIA/TVC; 5) Genomföra föreslagna förbättringar inom ramen för TVC. För att uppnå de beskrivna målen har fallstudie valts som den mest lämpliga forskningsstrategin. Datainsamlingen gjordes i första hand genom en-till-en semistrukturerade intervjuer men också med hjälp av fokusgrupper. Fokusgrupperna arrangerades med representanter från företag som använder ENOVIA V6 med TVC som komplement. Studien resulterade i en rad förbättringar och allmänna råd som är tänkta att utöka den nuvarande funktionella kapacitet av TVC och underlätta det bättre stödet för affärsprocesser och aktiviteter som är kopplade till utformning av överföringen. Samtliga föreslagna förbättringar presenterades (och en del genomfördes) för Technia AB, som är ägaren av produkten TVC.
Current research explores the existing ways and methods of translating product-related design information into the data required for fast and unflagging ramping up of manufacturing processes within two specific Product Lifecycle Management software products – ENOVIA V6 and Technia Value Components (TVC). The study also looks over the potentially-feasible improvements for these tools, which can speed up the relevant business processes and make them more configurable and flexible. The following goals were set: 1) Perform the analysis of current capabilities of ENOVIA and TVC tools in the area of design transfer; 2) Carry out a literature study on latest research materials related to design transfer; 3) Examine present needs of companies utilizing the software above; 4) Propose solutions and corresponding data models allowing to enhance the existing functionality of ENOVIA/TVC; 5) Implement suggested enhancements within the framework of TVC. A case study research strategy was selected as most suitable for achieving the described goals. The data was collected primarily through the one-to-one semi-structured interviews and focus groups arranged with the representatives of companies that utilize ENOVIA V6 complemented by TVC. The study resulted in a set of improvements and general recommendations that are supposed to extend the present functional capabilities of TVC and to facilitate the better backing of business processes and activities related to the design transfer. All suggested enhancements were proposed (and some implemented) to Technia AB, as to the owner of TVC product.
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Kopytin, Mikhail. « Longitudinal target-spin azimuthal asymmetry in deeply-virtual compton scattering ». Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2006. http://dx.doi.org/10.18452/15572.

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In der vorliegenden Arbeit werden Ergebnisse vom Experiment HERMES präsentiert, welche eine azimutale Asymmetrie bezüglich des Spins des Protontargets zeigen, die von der Interferenz zwischen dem Bethe-Heitler und dem Tiefvirtuelle Compton Streuung (DVCS) Prozess herrührt. Diese Asymmetrie, auch als longitudinale Target-Spin Asymmetrie (LTSA) bezeichnet, erlaubt hauptsächlich den Zugang zur polarisierten verallgemeinerten Partonverteilungen (GPD) H-tilde. Die kinematische Abhängigkeit der LTSA von t, x_B und Q2 wurde gemessen und mit vorhandenen Messungen am Deuteron verglichen. Die Ergebnisse wurden mit theoretischen Berechungen und mit aktuellen Messungen des CLAS-Experiments verglichen. Die Daten, die zur Analyse in der vorliegenden Arbeit verwendet werden, wurden am HERMES Experiment bei DESY genommen, wobei im HERA-Speicherring Positronenstrahlen der Energie 27.5 GeV an Wasserstoff- und Deuterium-Gas-Targets gestreut wurden. Darüber hinaus werden Produktionstests des HELIX-128 3.0 chips diskutiert. Der Chip ist ein Frontend-Auslesechip beim Silizium-Rückstossdetektor. Letzterer ist Teil des HERMES-Rückstossdetektors, welcher den Target-Bereich umschliesst, um die Rückstossprodukte der exklusiven Prozesse zu detektieren. Das primäre Ziel dieses Detektors ist es, eine vollständigere Untersuchung von DVCS durch zusätzliche Registrierung der Rückstossprotonen zu ermöglichen.
In this thesis results from HERMES are reported on an azimuthal asymmetry with respect to the spin of the proton target, which is attributed to the interference between the Bethe-Heitler process and the Deeply Virtual Compton Scattering process. The asymmetry, also referred to as the longitudinal target-spin asymmetry (LTSA), gives access mainly to the polarized Generalized Parton Distribution H-tilde. The kinematic dependences of the LTSA on t, x_B and Q^2 are measured and compared with the corresponding measurements on the deuteron. The results are compared with theoretical calculations and with the recent CLAS measurements. The data, used for analysis in this thesis, have been accumulated by the HERMES experiment at DESY scattering the HERA 27.6 GeV positron beam off hydrogen and deuterium gas targets. Additionally, production tests of the HELIX128 3.0 chip are discussed. The chip is the frontend readout chip of the silicon recoil detector. The latter is a part of the HERMES recoil detector, which is built around the target area in order to detect the recoiling products of exclusive processes. The primary goal of this detector is to facilitate a more complete study of DVCS by registering also the recoiling protons.
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Jensen, Anne Juel. « Mutterpflicht und Mütterwünsche eine ethnographische Studie in einer schwäbischen Kleinstadt ». Tübingen Tübinger Vereinigung für Volkskunde, 2006. http://www.tvv-verlag.de/tvv-03-02.html.

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Fuchs, Leonie. « Räume, zurechtgemacht und zurechtgelebt eine empirische Studie zur schulischen Raumkultur ». Tübingen Tübinger Vereinigung für Volkskunde, 2008. http://www.tvv-verlag.de/tvv-03-02.html#raeume.

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Reininghaus, Richard. « Die hausgemachte Religion Kommunikation und Identitätsarbeit in Hauskreisen ; eine Untersuchung zu religiösen Kleingruppen in Württemberg und etablierter Kirche am Ort ». Tübingen Tübinger Vereinigung für Volkskunde, 2008. http://www.tvv-verlag.de/tvv-03-01.html#reininghaus.

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Röhrs, Matthias. « I Tedeschi das Bild der Deutschen in italienischen Kriegserinnerungen ». Tübingen Tübinger Vereinigung für Volkskunde, 2004. http://www.tvv-verlag.de/tvv-03-01.html#roehrs.

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Blaha-Peillex, Nathalie. « Mütter und Anti-Mütter in den Märchen der Brüder Grimm ». Tübingen Tübinger Vereinigung für Volkskunde, 2005. http://www.tvv-verlag.de/tvv-03-01.html#muetter.

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Rickmeyer, Stefan. « Nach Europa via Tanger eine Ethnographie ». Tübingen Tübinger Vereinigung für Volkskunde, 2007. http://www.tvv-verlag.de/tvv-03-02.html#rickmeyer.

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Livres sur le sujet "Tvcv"

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1942-, Anderson Robert S., Gruneau Richard S. 1948-, Heyer Paul 1946- et Canadian Centre for Studies in Publishing., dir. TVTV : The television revolution, the debate. Vancouver, BC : Canadian Journal of Communication with the Canadian Centre for Studies in Publishing, Simon Fraser University Press at Harbour Centre, 1996.

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Deisman, Wade. TVCF : Analyse de la documentation et bibliographie. Ottawa, Ont : Sous-direction de la recherche et de l'évaluation, Direction des services de police communautaires, contractuels et autochtones, Gendarmerie royale du Canada, 2003.

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Nunn, R. H. TVC jet vane thermal modeling using parametric system identification. Monterey, Calif : Naval Postgraduate School, 1988.

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Nelms, R. M. Design of power electronics for TVC & EMA systems : Final report. [Washington, DC : National Aeronautics and Space Administration, 1994.

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United States. National Aeronautics and Space Administration., dir. Final report for design of power electronics for TVC EMA systems. [Washington, DC : National Aeronautics and Space Administration, 1993.

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Ying shi guang gao jing dian ping xi : Classical TVC advertising appreciation. Shanghai : Xue lin chu ban she, 2005.

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House, Commerce Clearing, dir. Working with tax-sheltered annuities : 403(b) plans explained : full text of IRS TVC Program included. Chicago, Ill : Commerce Clearing House, 1995.

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Incorporated, CCH, dir. Working with tax-sheltered annuities : 403(b) plans explained : full text of IRS TVC program included. Chicago, IL : CCH Incorporated, 1995.

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Incorporated, CCH, dir. Working with tax-sheltered annuities : 403(b) plans explained : full text of IRS TVC program included. Chicago, IL : CCH Incorporated, 1995.

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Subject to change : Guerrilla television revisited. Oxford : Oxford University Press, 1997.

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Chapitres de livres sur le sujet "Tvcv"

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Tideman, Sander. « The TVC systems mindset ». Dans Triple Value Leadership, 121–35. London : Routledge, 2022. http://dx.doi.org/10.4324/9781003119302-12.

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Koul, Rekha B., Rachel Sheffield et Leonie McIlvenny. « STEM, TVCs, and Makerspaces in the Indian Curriculum ». Dans Teaching 21st Century Skills, 157–69. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4361-3_9.

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Koul, Rekha B., Rachel Sheffield et Leonie McIlvenny. « STEM, TVCs, and Makerspaces in the Australian Curricula ». Dans Teaching 21st Century Skills, 171–88. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4361-3_10.

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Xie, Kan, Xinmin Chen, Junwei Li et Yu Liu. « Secondary Flow TVC for Fluidic-Throat Nozzles ». Dans Fluidic Nozzle Throats in Solid Rocket Motors, 95–133. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6439-6_5.

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Reynolds, Cecil R., et Arthur MacNeill Horton. « Assessment with the Test of Verbal Conceptualization and Fluency (TVCF) ». Dans Handbook of Executive Functioning, 265–82. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8106-5_16.

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Pina Amargós, Joaquín D., Raisa Socorro Llanes, David Paredes Miranda, Maykel Amador González et Dany L. Villarroel Ramos. « Incorporation of Immediacy, Dynamics and Interactivity to Digital Terrestrial Television Services in Cuba Through TVC+ ». Dans Communications in Computer and Information Science, 3–15. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56574-9_1.

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Belessiotis, Vassilis, Soteris Kalogirou et Emmy Delyannis. « Indirect Solar Desalination (MSF, MED, MVC, TVC) ». Dans Thermal Solar Desalination, 283–326. Elsevier, 2016. http://dx.doi.org/10.1016/b978-0-12-809656-7.00006-4.

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Wasielewski, Amanda. « Cracking the Ether ». Dans From City Space to Cyberspace. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland : Amsterdam University Press, 2021. http://dx.doi.org/10.5117/9789463725453_ch03.

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This chapter explores the earliest artist-led pirate TV project, PKP-TV, as an example of how squatter tactics were applied to the media. The illegal channel, which was created by the artists Maarten Ploeg (né van der Ploeg), Peter Klashorst, and Rogier van der Ploeg, made it its mission to crack open the closed medium of television. PKP and pirate cable TV in the Netherlands are situated within a longer history of both alternative TV projects internationally—such as the Videofreex and TVTV—as well as video and film-based artworks shown on television both in the Netherlands and abroad. Artist-led pirate television in the Netherlands, like squatters in urban space, cracked open the media space of television and created temporary autonomous platforms.
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« TVC and Implications for STEAM Teaching and Learning ». Dans Techno-Vernacular Creativity and Innovation. The MIT Press, 2021. http://dx.doi.org/10.7551/mitpress/12379.003.0016.

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Salvat, G., et D. Blivet. « ELECTRICAL TECHNIQUES | Food Spoilage Flora and Total Viable Count (TVC) ». Dans Encyclopedia of Food Microbiology, 578–80. Elsevier, 1999. http://dx.doi.org/10.1006/rwfm.1999.0475.

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Actes de conférences sur le sujet "Tvcv"

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Briones, Alejandro M., et Balu Sekar. « Characteristics of Multi-Cavity Trapped Vortex Combustors ». Dans ASME Turbo Expo 2010 : Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22151.

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This research is motivated towards improving and optimizing the performance of AFRL’s Inter-Turbine Burner (ITB) in terms of greater combustion efficiency, reduced losses and exit temperature profile requirements. The ITB is a minicombustor concept, situated in between the high and low pressure turbine stages and typically contains multiple fueled and non-fueled Trapped Vortex Combustor (TVC) cavities. The size, placement, and arrangement of these cavities have tremendous effect on the combustor exit temperature profile. The detailed understanding of the effect of these cavities in a three-dimensional ITB configuration would be very difficult and computationally prohibited. Therefore, a simple but somewhat similar conceptual axi-symmetric burner is used here the design variations of Trapped Vortex Combustor (TVC) through modeling and simulation. The TVC can be one single cavity or can be represented by multi-cavity combustor. In this paper, both single cavity TVC and multi-cavity TVCs are studied. The single cavity TVC is divided into multiple cavities while the total volume of the combustor remains constant. Four combustors are studied: Baseline, Staged, Three-Staged, and Interdigitated TVC. An extensive computational investigation on the characteristics of these multi-cavity TVCs is presented. FLUENT is used for modeling the axisymmetric reacting flow past cavities using a global eddy dissipation mechanism for C3H8-air combustion with detailed thermodynamic and transport properties. Calculations are performed using Standard, RNG, and Realizable k-ε RANS turbulence models. The numerical results are validated against experimental temperature measurements on the Base TVC. Results indicate that the pressure drag is the major contributor to total drag in the Base TVC. However, viscous drag is still significant. By adding a concentric cavity in sequential manner (i.e. Staged TVC), the pressure drag decreases, whereas the viscous drag remains nearly constant. Further addition of a secondary concentric cavity (i.e. Three-Staged TVC), the total drag does not further decrease and both pressure and viscous drag contributions do not change. If instead a non-concentric cavity is added to the Base TVC (i.e. Interdigitated TVC), the pressure drag increases while the viscous drag decreases slightly. The effect of adding swirl flow is to increase the fuel-air mixing and as a result, it increases the maximum exit temperature for all the combustors modeled. The jets and heat release contribute to increase pressure drag with the former being greater. The fuel and air jets and heat release also modify the cavity flow structure. By turning off the fuel and air jets in the Staged TVC, lower drag (or pressure loss) and exit temperature are achieved. It is more effective to turn off the fuel and air jets in the upstream (front) cavity in order to reduce pressure losses. Based on these results, recommendations are provided to the engineer/designer/modeler to improve the performance of the ITB.
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« TVCG Guest Editors' Introduction ». Dans 2019 IEEE Pacific Visualization Symposium (PacificVis). IEEE, 2019. http://dx.doi.org/10.1109/pacificvis.2019.00006.

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Chidlow, Ken, et Torsten Möller. « Rapid emission tomography reconstruction ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827053.

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Woodring, Jonathan, et Han-Wei Shen. « Chronovolumes ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827054.

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Chen, M., D. Silver, A. S. Winter, V. Singh et N. Cornea. « Spatial transfer functions ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827056.

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Singh, V., D. Silver et N. Cornea. « Real-time volume manipulation ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827057.

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Varadhan, Hari, et Klaus Mueller. « Volumetric ablation rendering ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827058.

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Kunii, Tosiyasu L. « Capstone address ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827075.

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Ogata, Masato, Shigeru Muraki, Xuezhen Liu et Kwan-Liu Ma. « The design and evaluation of a pipelined image compositing device for massively parallel volume rendering ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827060.

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Lakare, Sarang, et Arie Kaufman. « OpenVL ». Dans the 2003 Eurographics/IEEE TVCG Workshop. New York, New York, USA : ACM Press, 2003. http://dx.doi.org/10.1145/827051.827061.

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Rapports d'organisations sur le sujet "Tvcv"

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Hansen, S., et A. Cotta-Ramusino. Fermilab Physics Department TVC chip. Office of Scientific and Technical Information (OSTI), juillet 1990. http://dx.doi.org/10.2172/5461091.

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Pirone, Thomas P., Benjamin Raccah et Nor Chejanovsky. Vector Specificity in Potyvirus Transmission : Role of the Helper Component. United States Department of Agriculture, janvier 2003. http://dx.doi.org/10.32747/2003.7586456.bard.

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Objectives: The overall objective of this research was to gain a better understanding of how potyviruses interact with their aphid vectors. The aim was to design new approaches for prevention of potyvirus spread by aphids. The sub-objectives included: (1). Determination of which of the HCs of different potyviruses effect efficient transmission by specific aphid vectors; (2). Determine regions in the HC that play a role in their compatibility with the vector; (3). Determine the factors within the aphid stylets that modify HC activity in transmission. Background of the topic: Background to the topic: Potyviruses are typical non persistent viruses. They are retained within the vector’s stylets and rapidly lost by the vector. Some potyviruses greatly differ in their ability to be transmitted by different aphid species. The present work centered on analyzing factors that may modify the interactions between the "helper component"(HC), the virions and the aphid species involved. Major conclusions, solutions and achievements: It was established that specificity of transmission may depend on aphid species used. It was also shown that specificity may depend on the affinity between HC and virion. However, the attempts to create activechimericTEV/TuMVHCs or ZYMV/TuMVHCs to identify the regions that determine interaction with a specific vector(s), were not successful. More progress was attained in objective 3: In Kentucky, tests were conducted to ascertain retention tobacco vein mottling virus (TVMV) HC in the stylets of L. erysimicompared to that in M. persicae. Ultra-thin section of stylets of aphids that fed on either TuMVHC or TVMVHC antibodies were treated with gold-labeled goat anti-rabbit antibodies.TuMV was seen in 25% the stylets of L. erysimi when they acquired TuMVHC but not when they acquired TVMVHC. In M. persicae, TVMVHC was present in 30% of the stylets. . Transmission with TuMVHC was not affected by treatment with L. erysimi saliva whereas transmission with PVYHC (which also is not functional in L. erysimi) was consistently reduced by about half. Saliva from M. persicaehad essentially no effect on either HC. The possible role aphid cuticle proteins (which are found on the stylets surface) in the association with the potyviralHC was investigated in Israel. This was done adopting two approaches: (a) isolation of cuticular proteins from aphid cuticle; (b) screening for genes encoding cuticular proteins. In the first approach, we succeeded in extracting proteins from whole homogenized M. persicaeusing concentrated urea. The extracted protein served for preparation of anti cuticular antibodies. In overlay experiments it was found that cuticular proteins specifically bind to ZYMVHC. In addition, a cDNA library of M. persicae has been prepared. Genes encoding for cuticular proteins were ascertained using antibodies to cuticular proteins. This allowed reporting the sequence of the first cuticular gene of aphids and comparing it in six aphid species. Implications, scientific and agricultural: Achievements: (1) Proofs were provided for the role of the specificity of the aphid species to the HC of certain potyviruses; (2) aphid’s saliva was found to affects transmission efficiency; (3) cuticle protein genes were isolated for the first time from aphid species and an association of cuticle protein with the potyviralHC was discerned. Agricultural and/or economic impact of the research findings: At this stage of research, our finding do not bear an agricultural or economic impact.
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