Search results for "Mite"
showing 10 items of 795 documents
Da Parthenicum a Hykkara. Per un'ipotesi sul territorio della "ecclesia carinensis" tra preesistenze e continuità.
2011
Il territorio dell'odierno comune di Carini, sulla costa a 30 km ad Ovest di Palermo, è più volte menzionato dalle fonti scritte antiche (Tucidide, It. Ant., epistolario di Gregorio Magno, atti dei Sinodi). Qui si localizza la città sicana di Hykkara, distrutta dagli Ateniesi alla fine del V sec. a.C.; l'Itinerarium Antonini, in età costantiniana, colloca la "statio" di Hykkara in corrispondenza di un importante snodo della via Valeria riconosciuto presso la frazione di Villagrazia di Carini. Alle soglie dell'età bizantina, il pontefice Gregorio Magno menziona per due volte l'"ecclesia carinensis", sede diocesana intermedia fra Palermo e Lilibeo, la cui esistenza è documentata fino all'avan…
Mate‐Search Efficiency Can Determine the Evolution of Separate Sexes and the Stability of Hermaphroditism in Animals
2002
Limited availability of mating partners has been proposed as an explanation for the occurrence of simultaneous hermaphroditism in animals with pair mating. When low population density or low mobility of a species limits the number of potential mates, simultaneous hermaphrodites may have a selective advantage because, first, they are able to adjust the allocation of resources between male and female functions in order to maximize fitness; second, in a hermaphroditic population the likelihood of meeting a partner is higher because all individuals are potential mates; and, third, in the absence of mating partners, many simultaneously hermaphroditic animals have the option of reproducing throug…
L’ampliamento come occasione di recupero della memoria e dell’identità
2012
We present the enlargement plan of an isolated cemetery in a small town of the west Sicily as it exemplifies some way to carry out the design for an “addition”. The enlargement faces a still readable and characteristic nineteenth-century building. Even introducing unavoidable innovative characteristics, the architecture we designed tries to resolve the difficult relationship between the new portion and the old cemetery, bell shaped, in steep slope above the town. The recovery of this place for collective memory, once realized as a closed enclosure, is realized by the mediation of a space which seeks to maintain, recover and reinforce the identity of places altered in the last years by uncon…
Vidal Beneyto: posibilidades y límites del análisis estructural
1981
Reseña sobre el libro "Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía", que coordina Vidal-Beneyto. Referencia completa: Vidal-Beneyto, José (Ed.) (1981). Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía. Madrid: Editora Nacional, Cultura y Sociedad.
Un análisis estructuralista presentado por Vidal Beneyto
1981
Reseña sobre el libro "Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía", que coordina Vidal-Beneyto. Referencia completa: Vidal-Beneyto, José (Ed.) (1981). Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía. Madrid: Editora Nacional, Cultura y Sociedad.
Posibilidades y límites del análisis estructural: Presentación
1981
High‐Resolution Proxy Records From Two Simultaneously Grown Stalagmites From Zoolithencave (Southeastern Germany) and their Potential for Palaeoclima…
2020
Two small annually laminated stalagmites from Zoolithencave (southeastern Germany) grew between CE 1821 and 1970 (Zoo‐rez‐1) and CE 1835 and 1970 (Zoo‐rez‐2), respectively. Trace element concentrations were determined by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA‐ICP‐MS). Samples for δ13C and δ18O analyses were micromilled on annual and subannual resolution. Soil and host rock samples were analyzed by X‐Ray Diffraction (XRD) and their elemental concentrations determined via inductively coupled plasma optical emission spectrometer (ICP‐OES). Trace element concentrations in the stalagmites show two groups in the principal component analyses: one with Mg, Ba, and Sr and an…
Effects of glaciation on karst hydrology and sedimentology during the Last Glacial Cycle: The case of Granito cave, Central Pyrenees (Spain)
2021
In Alpine regions, speleothem development on karst systems largely occurs during warm interglacial or interstadial phases due to their limited growth during cold stages. Still, recent attention has been given to the role of clastic sediments in caves, less dependent on temperature conditions. Yet, only a small number of caves worldwide preserve both speleothems and detrital deposits. Here we present an outstanding record of fine-grain laminated sediments and carbonate speleothems from the Granito cave (South Central Pyrenees, Spain) associated with seasonal to annual hydroclimatic pulses through the Last Glacial Cycle (LGC). Analysis of cave clastic facies together with new absolute dates o…
Vegetation and environmental changes in tropical South America from the last glacial to the Holocene documented by multiple cave sediment proxies
2019
Abstract δ 18 O values in speleothems have been utilized to document past changes in South American monsoon intensity. However, changes in regional vegetation and ecosystems have not been part of this discussion, and other cave proxies such as speleothem δ 13 C values, a useful proxy for vegetation reconstruction, have been neglected due to interpretive complexities. Here we report δ 13 C values and 87Sr/86Sr ratios in stalagmites, together with XRF-derived elemental chemistry, δ 13 Corg values and carbon content from a sedimentary profile from the same cave where the stalagmites were collected. In combination with a previously published δ 18 O record, this enables us to clarify climate and…
2021
Holocene climate in Central Europe was characterized by variations on millennial to decadal time scales. Speleothems provide the opportunity to study such palaeoclimate variability using high temporal resolution proxy records, and offer precise age models by U-series dating. However, the significance of proxy records from an individual speleothem is still a matter of debate, and limited sample availability often hampers the possibility to reproduce proxy records or to resolve spatial climate patterns. Here we present a palaeoclimate record based on four stalagmites from the Hüttenbläserschachthöhle (HBSH), western Germany. Two specimens cover almost the entire Holocene, with a short hiatus …