Search results for "Termes"
showing 10 items of 92 documents
Occurrence of rhizobia in the gut of the higher termite Nasutitermes nigriceps
2006
Wood-eating termites feed on a diet highly deficient in nitrogen. They must complement their diet with the aid of nitrogen-fixing bacteria. Nitrogen fixation in the gut has been demonstrated, but information about nitrogen-fixing bacteria in pure culture is scarce. From the higher termite Nasutitermes nigriceps the symbiotic bacterial strain M3A was isolated, which thrives in the hindgut contents. The Gram-negative strain exhibited similarities to the species of the genus Ensifer (including Sinorhizobium) on the basis of morphological and physiological/biochemical features. The 16S rRNA gene analysis showed the highest sequence similarity of the isolate M3A to Ensifer adhaerens (>99%; ATCC …
In vitro and in vivo sulfate reduction in the gut contents of the termite Mastotermes darwiniensis and the rose-chafer Pachnoda marginata.
2005
Sulfate-reducing bacteria (SRB) from termites have been assigned to the genus Desulfovibrio. Desulfovibrio intestinalis lives in the gut of the Australian termite Mastotermes darwiniensis. For the first time we were able to enrich and identify a sulfate-reducing bacterium from the gut of the rose-chafer Pachnoda marginata, which showed the highest 16S rDNA sequence identity (93%) to Desulfovibrio intestinalis and Desulfovibrio strain STL1. Compared to Mastotermes darwiniensis (1x10(7) cells of SRB per ml gut contents), sulfate-reducing bacteria occurred in higher numbers in the gut contents of Pachnoda marginata reaching cell titers of up to 2x10(8) cells per ml gut contents. In vitro sulfa…
Isolation of methanotrophic bacteria from termite gut.
2015
The guts of termites feature suitable conditions for methane oxidizing bacteria (MOB) with their permanent production of CH4 and constant supply of O2 via tracheae. In this study, we have isolated MOB from the gut contents of the termites Incisitermes marginipennis, Mastotermes darwiniensis, and Neotermes castaneus for the first time. The existence of MOB was indicated by detecting pmoA, the gene for the particulate methane monooxygenase, in the DNA of gut contents. Fluorescence in situ hybridization and quantitative real-time polymerase chain reaction supported those findings. The MOB cell titer was determined to be 10(2)-10(3) per gut. Analyses of the 16S rDNA from isolates indicated clos…
Termite Gut Symbiotic Archaezoa Are Becoming Living Metabolic Fossils
2003
ABSTRACT Over the course of several million years, the eukaryotic gut symbionts of lower termites have become adapted to a cellulolytic environment. Up to now it has been believed that they produce nutriments using their own cellulolytic enzymes for the benefit of their termite host. However, we have now isolated two endoglucanases with similar apparent molecular masses of approximately 36 kDa from the not yet culturable symbiotic Archaezoa living in the hindgut of the most primitive Australian termite, Mastotermes darwiniensis . The N-terminal sequences of these cellulases exhibited significant homology to cellulases of termite origin, which belong to glycosyl hydrolase family 9. The corre…
Les termes du commerce dans les dictionnaires bilingues et plurilingues
2021
In this article, we analyze a corpus made up of two general French-Italian and Italian-French bilingual dictionaries and two multilingual dictionaries. We take into account, in particular, the macrostructure, the microstructure, the technical terminology and the phraseology of these dictionaries. Using a magnifying glass metaphorically, we focus on the treatment of the specialty language of commerce within the articles of the general bilingual dictionaries. With regard to plurilingual dictionaries, we try to show the lexicographical choices dictated by a requirement of extreme synthesis; the size of a dictionary, especially for schools, influences not only the convenience of consultation bu…
Emotivity in Valencian demonstratives
2022
Més que una proximitat metafòrica cap al referent, la dixi emotiva, afectiva o empàtica produeix proximitat cap a l’oient arran de l’atenció conjunta i/o l’avaluació del referent. Aquest treball estudia els usos del demostratiu (com ara, la funció nominal o adverbial, el grau, el mode referencial, el caràcter humà, etc.) i de les seues construccions (anteposades al nom, posposades al nom o sense nucli nominal) per a comprovar quin tipus de demostratius tendeixen a tindre referents que són valorats de manera positiva o negativa. Per a realitzar aquesta exploració, hem recollit 383 formes demostratives d’un corpus propi (CoValC) format per converses col·loquials entre valencianoparlants de di…
Degradation of dimeric lignin model compounds by aerobic bacteria isolated from the hindgut of xylophagous termites.
1997
The capability of the intestinal flora from the gut of xylophagous termites of degrading lignin model compounds was investigated. Different dimeric lignin model compounds-degrading bacteria were obtained from the hindgut flora of Mastotermes darwiniensis FROGGATT, Reticulitermes santonensis FEYTAUD, Nasutitermes nigriceps HALDEMAN and Zootermopsis angusticollis HAGEN. In the presence of oxygen dimeric model compounds were degraded by all isolates. This indicates that the hindgut flora of termites is basically able to produce substrate for their host from aromatic extractives of wood.
La configuración formal de las palabras idiomáticas originadas por acortamiento en locuciones en español: los casos de amén, estampía, mor y ton
2022
En el presente artículo pretendemos analizar la configuración formal con la que han quedado fijadas cuatro palabras idiomáticas (amén, estampía, mor y ton) que se han formado mediante aféresis, síncopa y apócope, es decir, procesos de acortamiento o eliminación de un fragmento respecto a una base originaria. Nos centraremos en fenómenos habituales que presentan este tipo de voces así formadas, como la estructura silábica, la acentuación paroxítona o la dislocación acentual respecto a sus bases. Reservamos para estudios futuros un análisis fraseológico centrado en los sintagmas y funciones de las cinco locuciones que estas conforman. The aim of this paper is to analyze the morphology of four…
Isolation of Desulfovibrio intestinalis sp. nov. from the hindgut' of the lower termite Mastotermes darwiniensis.
1999
A Gram-negative, anaerobic sulfate-reducing bacterium was isolated from hindgut contents of the lower termite Mastotermes darwiniensis Froggatt (strain KMS2). Strain KMS2 is motile by a single polar flagellum. The isolate possesses desulfoviridin and catalase activity. The G+C content of its DNA is in the range of 54.5-55.5 mol% (strain KMS2). It respires hydrogen and different low molecular weight organic compounds in the presence of sulfate, thiosulfate, and sulfite, and also oxygen. The isolated strain ferments pyruvate. Fastest growth with a doubling time of 12.5 h was obtained at 37°C and not at 28°C, the temperature at which the termites were grown. The isolate showed a 16S rDNA seque…
La tutela dei creditori personali del legittimario leso o pretermesso
2019
Nelle prassi successorie non è infrequente il ricorso alla frode per via testamentaria, rivolta a colpire i creditori personali del legittimario leso o pretermesso, i quali non godono nel nostro codice civile di un’apposita tutela ad essi esplicitamente rivolta. L'Autore si interroga sulla possibilità di reperire comunque nelle pieghe dell’ordinamento rimedi a tal fine utilizzabili, giungendo infine ad una proposta di riformulazione dell'art. 524 c.c. SOMMARIO: 1. Il problema. – 2. La giurisprudenza. – 3. La dottrina. – 4. Considerazioni di metodo. – 5. Un’ipotesi ricostruttiva. – 6. Proposte de iure condendo.