Search results for "Rites"
showing 10 items of 427 documents
Porites corals from Crete (Greece) open a window into Late Miocene (10Ma) seasonal and interannual climate variability
2006
Variations in the biotic composition of marine shallow water carbonates document global climatic changes. However, a discontinuous stratigraphic record and uncertainties regarding the ages limit the significance of shallow water carbonates as palaeoclimatic archives on geological time-scales. Notwithstanding these deficits, the environmental information stored in the skeleton of reef biota is a unique source of information that resolves seasonal to interannual climate variability in geological time. Application of the method to corals from carbonate rocks is usually restricted to the past 130,000yr, because the aragonite skeleton undergoes rapid diagenetic alteration. Consequently, reconstr…
Pantelleria island (Strait of Sicily): volcanic history and geomorphological landscape
2017
Pantelleria is a volcanic island located in the Strait of Sicily, 95 km far from the Sicilian coastline and 67 km from Cape Bon (Tunisia). The volcanological history of the island begins approximately 324 ka BP and the last eruptive event was a submarine eruption that occurred on 1891 A.D. Eruptive activity was characterized by seven very intense explosive events, the latest being the Green Tuff (44 ka). They have all produced ignimbrite sheets that covered large sectors of the island. The landscape of the island mirrors the variety of the eruptive styles and their interplay with volcano-tectonics. The most evident geomorphological features are represented by: (i) the mantle-like distributi…
Nutrients attenuate the negative effect of ocean acidification on reef coral calcification in the Arabian Sea upwelling zone (Masirah Island, Oman)
2021
Tropical shallow-water reefs are the most diverse ecosystem in the ocean. Its persistence rests upon adequate calcification rates of the reef building biota, such as reef corals. Optimum calcification rates of reef corals occur in oligotrophic environments with high seawater saturation states of aragonite (Ωsw), which leads to increased vulnerability to anthropogenic ocean acidification and eutrophication. The calcification response of reef corals to this changing environment is largely unknown, however. Here, we present annually and sub-annually resolved records of calcification rates (n = 3) of the coral Porites from the nutrient rich and low Ωsw Arabian Sea upwe…
Coral growth bands: A new and easy to use paleothermometer in paleoenvironment analysis and paleoceanography (late Miocene, Greece)
2006
[1] Modern scleractinian corals are classical components of marine shallow warm water ecosystems. Their occurrence and diversity patterns in the geological record have been widely used to infer past climates and environmental conditions. Coral skeletal composition data reflecting the nature of the coral environment are often affected by diagenetic alteration. Ghost structures of annual growth rhythms are, however, often well preserved in the transformed skeleton. We show that these relicts represent a valuable source of information on growth conditions of fossil corals. Annual growth bands were measured in massive hemispherical Porites of late Miocene age from the island of Crete (Greece) t…
Freshwater discharge and sediment dispersal — Control on growth, ecological structure and geometry of Late Miocene shallow-water coral ecosystems (ea…
2007
Abstract Insolation-driven oceanographic changes are well documented in the Mediterranean deep-sea record and reflect episodes of high precipitation and/or freshwater discharge. In the shallow-water record, however, changes in relative sea-level and sea surface temperature are usually regarded as prime controls on Miocene coral reefs, whereas pulses of freshwater influx represent a hitherto unrecognized factor influencing their growth, ecological structure and geometry. On the island of Crete (NW Messara Basin, Greece) early Tortonian coral biostromes occur associated with deltas along the basin margin and rimming islands formed by large uplifted tectonic blocks. In turbid delta environment…
Late Miocene sea surface salinity variability and paleoclimate conditions in the Eastern Mediterranean inferred from coral aragonite δ18O
2009
Abstract Coral skeletons are archives of chemical proxies which enable paleoenvironmental reconstructions to be made at subannual resolution. Stable oxygen isotope ( δ 18 O) ratios of these archives reflect sea surface temperature (SST) as well as the δ 18 O composition of ambient seawater. The δ 18 O seawater composition is not only controlled by global ice build-up, but river discharge and the hydrological balance of evaporation and precipitation, all influencing sea surface salinity (SSS), also play an important role in marginal seas. New sub-annually resolved coral δ 18 O data were measured and evaluated together with published data from reef coral communities of Late Miocene age from C…
Sabiedrības ar ierobežoto atbildību “SĒME” koeficientu un salīdzinoša finanšu analīze
2022
Bakalaura darba tēma ir “Sabiedrības ar ierobežoto atbildību “SĒME” koeficientu un salīdzinoša finanšu analīze”. Bakalaura darba mērķis ir pamatojoties uz zinātnisku literatūru un cietiem iespējamiem avotiem, kā arī izmantojot SIA “SĒME” grāmatvedības atskaišu datus, veikt SIA “SĒME” koeficientu un salīdzinošo finanšu analīzi un izstrādāt priekšlikums saimnieciskās darbības uzlabošanai. Bakalaura darbs sastāv no ievada, trim daļām, secinājumiem un priekšlikumiem. Ievadā ir aprakstīta tēmas aktualitāte, pamatota uzņēmuma izvēle, definēti darba mērķi un izstrādāti uzdevumi mērķa sasniegšanai, aprakstītas darbā izmantotās pētīšanas metodes. Pirmajā nodaļā izpētīti finanšu analīzes teorētiskie …
Les ménestrels du duc. Musique et politique à la cour de Philippe le Hardi (1364-1404)
1999
Place: Dijon
H1 antihistamīna preparātu aprites salīdzinājums un ietekme uz alerģisko reakciju izpausmju izmaiņām preparātu lietotāju vidū
2017
Ar alerģijām sastopas aizvien vairāk cilvēku un mūsdienās alerģijas attīstību nosaka ģenētiskā predispozīcija, dzīvesveida, apkārtējās vides pārmaiņas un šo faktoru mijiedarbība. Maģistra darba mērķis bija noskaidrot, cik plaši tiek patērēti H1 antihistamīna preparāti pēdējā gada laikā un kā ir mainījušās to lietošanas tendences. Ar aptaujas anketu palīdzību veikt klientu analīzi, kas lieto H1 antihistamīna preparātus. H1 antihistamīna preparātu aprites pētījumā Rīgas aptiekā, tika noskaidrots, ka pārdoto bezrecepšu oriģinālu skaits 2016. gadā ir pieaudzis par 4,78 %. Noskaidrots, ka Vibrocil pārdošana palielinājusies par 9,46%, Claritine (Loratadinum) pārdošana palielinājusies par 1,12%. P…
Nitric oxide metabolites (nitrite and nitrate) in several clinical condition.
2013
We determined the concentration of nitric oxide metabolites (NO2-+NO3-), expressed as NOx, in several clinical conditions. Regarding this, we have examined 25 subjects with arterial hypertension, 41 subjects with chronic kidney disease in conservative treatment, 106 subjects with metabolic syndrome subdivided according to the presence (n = 43) or not (n = 63) of diabetes mellitus, 48 subjects with obstructive sleep apnea syndrome (OSAS), 14 women with systemic sclerosis complicated with Raynaud's phenomenon, 42 dialyzed subjects and 105 young subjects with acute myocardial infarction (AMI). In subjects with arterial hypertension, chronic kidney disease, metabolic syndrome, systemic sclerosi…