Готові списки джерел за темами / Xenopobia

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Добірка наукової літератури з теми "Xenopobia"

Автор: Grafiati

Опубліковано: 24 травня 2025

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Статті в журналах з теми "Xenopobia"

Schoeman, Anneke Lincoln, Nikol Kmentová, Maarten P. M. Vanhove, and Louis Heyns Du Preez. "Intraspecific morphological and genetic variation in South African populations of a polystomatid flatworm parasite." Belgian Journal of Zoology 154 (February 15, 2024): 45–62. http://dx.doi.org/10.26496/bjz.2024.118.

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The African Clawed Frog Xenopus laevis, a global invader, exhibits a marked phylogeographic divergence among native populations in southern Africa, which seems to enhance its invasive potential. The polystomatid flatworm, Protopolystoma xenopodis, is the frog’s most frequently co-introduced metazoan parasite. In an integrative approach, we utilised morphometrics and molecular markers to assess variation in P. xenopodis in its native range. We measured twelve key morphological characters from 23 flatworms and compared these statistically between flatworms collected from the northern- and southernmost distribution in South Africa. Phylogenetic analyses were based on three concatenated markers, namely 28S and 12S rDNA and COX1, from six flatworms. The combination of five morphological characters, which involve egg size, gut morphology and size of the attachment hooks, differentiated northern and southern populations of P. xenopodis. The multilocus phylogenetic analyses showed a cluster of northern P. xenopodis and two southern lineages with more basal positioning. These findings demonstrate a relatively high level of intraspecific variation in P. xenopodis in its native range. The presented intraspecific variation of P. xenopodis could be potentially informative to trace geographic origin in its non-native range.

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JACKSON, J. A., and R. C. TINSLEY. "Protopolystoma xenopodis (Monogenea) primary and secondary infections in Xenopus laevis." Parasitology 123, no. 5 (November 2001): 455–63. http://dx.doi.org/10.1017/s0031182001008745.

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The reproductive kinetics of Protopolystoma xenopodis primary and secondary infections in Xenopus laevis were monitored in a 3-year study. Thirty-five naïve, lab-raised, full-sib X. laevis from 1 spawning were each exposed to 30 P. xenopodis eggs. The course of infections at 20 °C was monitored by screening isolated hosts for parasite egg production. Ninety-four percent of toads supported the development of gravid parasites. Infections became patent 9–19 weeks p.i., lasted 3–30 months and produced estimated totals of 1–7152 eggs/host. Variation in primary infection characters was discontinuous: a subgrouping of hosts (16%) was characterized by extended infection duration and low reproductive rate. In order to test the effect of long-term infection history on a subsequent challenge, each host was re-exposed to P. xenopodis infective stages (30 eggs/host) 6 months after the loss of its original infection. Establishment of patent infection was significantly lower (15%), and pre-patent period (12–28 weeks) longer, than in primary infections of the same hosts, and than in concurrently exposed naïve controls (contemporary full-sibs of the primary/secondary infection group, maintained in parallel; n = 28). There was no relationship between primary infection characteristics and secondary infection outcome. Overall reproductive output per initial infective stage for the primary exposure exceeded that for the secondary exposure by a ratio of 15[ratio ]1. Results suggest that primary infection with P. xenopodis can elicit strong, long-term protective immunity against re-infection in X. laevis.

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Cioffi, Kathleen. "Toward Xenopolis: Visions from the Borderland." Polish Review 69, no. 4 (December 1, 2024): 92–95. http://dx.doi.org/10.5406/23300841.69.4.10.

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Melnikov, D. "New combinations in the genus Clinopodium L. (Lamiaceae)." Novitates Systematicae Plantarum Vascularium 45 (2014): 148–49. http://dx.doi.org/10.31111/novitates/2014.45.148.

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Two new combinations in the genus Clinopodium are published: Clinopodium subg. Xenopoma (Willd.) Melnikov comb. et stat. nov., and Clinopodium banaoense (P. Herrera, I. E. Méndez et Bécquer) Melnikov comb. nova.

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Vlăduţescu, Ştefan. "Some Uncertainties at Romanian Beginning of the Philosophy of History." International Letters of Social and Humanistic Sciences 26 (April 2014): 71–77. http://dx.doi.org/10.18052/www.scipress.com/ilshs.26.71.

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The study is part of the contemporary effort of scanning and philosophical-epistemological exploration of valuable research of the history of philosophy and the philosophy of history. The investigative approach proves that the Xenopolian philosophical ideas are extended in relation to the status of philosophy at the time. It follows that in his writings the scientist uses a philosophic vocabulary and thematizes interrogatively the elevated aspects of the reflection on history.

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Jackson, Helen C., and R. C. Tinsley. "Environmental influences on egg production by the monogenean Protopolystoma xenopodis." Parasitology 97, no. 1 (August 1988): 115–28. http://dx.doi.org/10.1017/s0031182000066798.

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SUMMARYA continuous succession of egg capsules is formed in the ootype of Protopolystoma xenopodis and released into the urinary bladder of the host, Xenopus laevis. Since egg capsules are passed out with the aquatic toad's urine several times a day, the rate of parasite egg production can be recorded accurately by direct counts. Temperature has a marked influence on the rate of egg output which doubles in response to a rise from 17 to 25 °C. Under constant temperature conditions regular egg collections from isolated toads infested with single Protopolystoma revealed that rates of production remain stable for periods of several weeks. The overall mean rate of egg production was 8·9 eggs/worm/day (e.w.d.) at 20·0±0·5 °C (based on 5 consecutive egg collections from 58 individual parasites). Significant differences were observed, however, between the mean rates of output from different hosts, ranging from 2·1 e.w.d. (s.d. = 0·6) to 17·7 e.w.d. (S.D. = 3·2). Neither differences in worm age nor host-factors could explain the observed range in output. Worms transferred to new hosts resumed egg production at pre-transfer rates, suggesting inherent differences in the capacity for egg production by individual parasites. Total production increased with increasing worm burden, but output per parasite was significantly reduced in groups of 2, 3 or 4. Whilst competition for some finite resource provides one interpretation, this observation could equally reflect a statistical phenomenon associated with the reduced chance of encountering groups of individuals which are heterogeneous for egg production as worm burden increases and sample size decreases.

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Jackson, Joseph A., and Richard C. Tinsley. "DENSITY DEPENDENCE OF POSTLARVAL SURVIVORSHIP IN PRIMARY INFECTIONS OF PROTOPOLYSTOMA XENOPODIS." Journal of Parasitology 89, no. 5 (October 2003): 958–60. http://dx.doi.org/10.1645/ge-3132.

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Jackson, J. "Effects of temperature on oviposition rate in Protopolystoma xenopodis (Monogenea: Polystomatidae)." International Journal for Parasitology 28, no. 2 (February 1998): 309–15. http://dx.doi.org/10.1016/s0020-7519(97)00151-3.

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Mbokane, E. M., J. Theron, and W. J. Luus-Powel. "Diversity of parasites from Xenopus laevis (Amphibia: Pipidae) and their seasonal rate of infection in selected habitats in the Limpopo Province, South Africa." Helminthologia 57, no. 3 (August 5, 2020): 252–67. http://dx.doi.org/10.2478/helm-2020-0027.

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SummaryThis study determined the diversity and seasonality of parasites species of the African clawed frog, Xenopus laevis (Daudin, 1802), from three localities, namely Modjadjikloof, Mokopane and University of Limpopo, Limpopo Province, South Africa. A total of seven parasite species were collected and identified. They included two nematodes, Camallanus kaapstaadiSouthwell & Kirshner, 1937 and Batrachocamallanus slomei (Southwell & Kirshner, 1937), a monogenean, Protopolystoma xenopodis (Price, 1943), a cestode, Cephalochlamys namaquensis (Cohn, 1906), a protozoan, Trichodina xenopodosFantham, 1924, two digeneans, Progonimodiscus doyeri Ortlepp, 1926 and Dollfuschella rodhainiVercammen-Grandjean, 1960. The most common and abundant parasite species by far were Cm. kaapstaadi, B. slomei and Cp. namaquensis, with Cm. kaapstaadi, B. slomei present in all localities. Trichodina xenopodos was a rare species, only present in host populations from Modjadjiskloof. Modjadjiskloof had the highest species richness (all seven parasite species) followed by Mokopane (five parasite species) and University of Limpopo (3 parasite species). There were also higher infection levels (prevalence and mean intensity) of Cm. kaapstaadi, B. slomei, Cp. namaquensis and Pt. xenopodis in hosts from Modjadjiskloof while Pd. doyeri and D. rodhaini infection levels were greater in Mokopane. The variability between localities shows that parasites with heteroxenous life cycles are more strongly associated with more pristine habitats. The variability in calculated indices (prevalence and mean intensity) also suggests that the occurrence of some of the parasites is affected by season, favouring higher infection rates during summer. This suggests that temperature has a direct role in the reproductive and developmental processes of these parasites. Neither length nor sex had an influence on the prevalence or intensity of parasites.

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Theunissen, Maxine, Louwrens Tiedt, and Louis H. Du Preez. "The morphology and attachment ofProtopolystoma xenopodis(Monogenea: Polystomatidae) infecting the African clawed frogXenopus laevis." Parasite 21 (2014): 20. http://dx.doi.org/10.1051/parasite/2014020.

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Більше джерел

Дисертації з теми "Xenopobia"

Schmitt, Laura. "Scandales en terre d'asile : l'indignation et les étrangers en France (1933-1939)." Electronic Thesis or Diss., université Paris-Saclay, 2025. http://www.theses.fr/2025UPASK001.

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Émotion partageable par excellence, à la croisée des affects individuels et collectifs, l'indignation à l'égard des étrangers est un observatoire du politique et des représentations sociales. Entre le printemps 1933, moment de l'afflux des réfugiés du Reich, et septembre 1939, début de la Seconde Guerre mondiale en Europe, la France, alors premier pays d'immigration, doit affronter les conséquences de la crise économique et accueillir les différents flux de réfugiés politiques qui se succèdent, leur acmé se produisant au moment de la Retirada à la fin de la guerre d'Espagne.Cette enquête analyse ses composantes xénophobes aussi bien que xénophiles, et interroge son rôle dans la redéfinition de l'étranger. Utilisée par les différents acteurs pour influer sur le politique, élaborer, consolider ou contester des normes sociales et juridiques, l'indignation participe également à façonner leur ethos, contribuant ou non à l'édification de communautés émotionnelles.À partir d'un corpus polymorphe constitué de documents ministériels, d'archives de presse, de débats des assemblées parlementaires et des conseils généraux, et de lettres de particuliers, l'étude multiscalaire croise les approches pour saisir l'indignation et la constellation émotionnelle dans laquelle elle prend place. Outils lexicométriques, analyse de discours et concepts sociologiques sont utilisés dans une perspective diachronique et synchronique afin de reconstituer ses circulations et de comprendre les soubassements de l'atmosphère émotionnelle de la France des années trente
An emotion that can be shared par excellence, at the crossroads of individual and collective affects, indignation towards foreigners is an observatory of politics and social representations. Between the spring of 1933, when refugees flooded in from the Reich, and September 1939, when the Second World War broke out in Europe, France, the leading country of immigration at the time, had to cope with the consequences of the economic crisis and take in a succession of political refugees, culminating in the Retirada at the end of the Spanish Civil War.This study analyses its xenophobic and xenophile components, and examines its role in redefining the foreigner. Used by different actors to influence politics, and to develop, consolidate or challenge social and legal norms, indignation also helps to shape their ethos, contributing or not to the construction of emotional communities.Drawing on a polymorphous corpus of ministerial documents, press archives, debates in parliamentary assemblies and general councils, and letters from individuals, this multiscalar study crosses approaches to grasp indignation and the emotional constellation in which it takes place. Lexicometric tools, discourse analysis and sociological concepts are used in a diachronic and synchronic perspective in order to reconstruct its circulation and understand the underpinnings of the emotional atmosphere in 1930s France

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Книги з теми "Xenopobia"

Czyżewski, Krzysztof, and Timothy Snyder. Toward Xenopolis. Edited by Mayhill C. Fowler. Boydell and Brewer Limited, 2022. http://dx.doi.org/10.1017/9781800105294.

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Czyżewski, Krzysztof, Mayhill C. Fowler, and Timothy Snyder. Toward Xenopolis: Visions from the Borderland. University of Rochester Press, 2022.

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Czyżewski, Krzysztof, Mayhill C. Fowler, and Timothy Snyder. Toward Xenopolis: Visions from the Borderland. University of Rochester Press, 2022.

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Xenopolis: Von der Faszination und Ausgrenzung des Fremden in München. Berlin: Metropol, 2005.

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Частини книг з теми "Xenopobia"

"Xenopolis." In Toward Xenopolis, 1–26. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-006.

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Fowler, Mayhill C. "Preface: Practicing the Borderland." In Toward Xenopolis, xiii—xvi. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-002.

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"Sacrum, Fascism, Eliade." In Toward Xenopolis, 117–32. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-015.

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"Our Bosnia: Bosnia Becomes Ours—Until It Hurts." In Toward Xenopolis, 100–114. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-014.

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"Frontmatter." In Toward Xenopolis, i—vi. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-fm.

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"Miłosz: A Connective Tissue." In Toward Xenopolis, 27–34. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-007.

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"Between Timișoara and Târgu Mureș." In Toward Xenopolis, 93–99. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-013.

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"Drama of the Polish Outsider." In Toward Xenopolis, 41–50. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-009.

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"Index." In Toward Xenopolis, 205–12. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-022.

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"Stanisław Barańczak: A Widening Horizon." In Toward Xenopolis, 145–56. Boydell and Brewer, 2022. http://dx.doi.org/10.1515/9781800105294-017.

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