Search results for "emissions"

Gas manifestations of Greece: Catalogue, geochemical characterization and gas hazard definition

2015

Like other geodynamically active areas, Greece is affected by a large number of geogenic gas manifestations. These occur either in form of point sources (fumaroles, mofettes, bubbling gases) or as diffuse emanations. We produced a first catalogue of the geogenic gas manifestations of Greece also considering few literature data. Collected samples were analysed for their chemical (He, Ne, Ar, O2, N2, H2, H2S, CO, CH4 and CO2) and isotopic composition (He, C and N). Most of the sampled gas manifestation are found along the South Aegean active volcanic arc (32 sites) and in the majority they belong to the CO2 dominated group. Very few gas manifestations, N2- or CH4- dominated, are found along t…

The fluids’ geochemistry along the "Sperchios Basin - Northern Evoikos Gulf" Graben, a geodynamically complex area of Central Greece

2013

Biofuel blending reduces particle emissions from aircraft engines at cruise conditions.

2017

Aviation-related aerosol emissions contribute to the formation of contrail cirrus clouds that can alter upper tropospheric radiation and water budgets, and therefore climate1. The magnitude of air-traffic-related aerosol–cloud interactions and the ways in which these interactions might change in the future remain uncertain. Modelling studies of the present and future effects of aviation on climate require detailed information about the number of aerosol particles emitted per kilogram of fuel burned and the microphysical properties of those aerosols that are relevant for cloud formation. However, previous observational data at cruise altitudes are sparse for engines burning conventional fuel…

Eco-Efficiency of the English and Welsh Water Companies: A Cross Performance Assessment

2021

Analyzing costs and greenhouse gas (GHG) emissions could be of great importance for the water utilities to supply water services in a healthy and sustainable manner. In this study, we measured the eco-efficiency of several water utilities in England and Wales by incorporating GHG as an undesirable output. For the first time, we evaluated the eco-efficiency of the water production process using robust cross-efficiency data envelopment analysis (DEA) techniques. The further use of clustering and regression techniques allowed us to better understand the drivers of eco-efficiency. The results showed that the mean eco-efficiency of the water sector was 0.748, which indicates that costs and GHG e…

Welche Eigenschaften machen ein Neuroleptikum "atypisch"?

2001

Die Gruppe der “atypischen” Neuroleptika ist keine einheitliche Substanzklasse, sondern sowohl nach pharmakologischen als auch nach klinischen Kriterien sehr heterogen. Die Ubergange von dem prototypischen “atypischen” Neuroleptikum Clozapin zu den “konventionellen” Neuroleptika erscheinen fliesend. Anhand der praklinischen Besonderheiten dieser Substanzen und ihrer Charakteristika in SPECT- und PET-Studien werden die wesentlichen Konzepte diskutiert, die man heute fur die “Atypie” eines Neuroleptikums verantwortlich macht. Dazu zahlen insbesondere der kombinierte Antagonismus von D2-artigen Dopamin- und 5-HT2-Serotoninrezeptoren und die praferentielle Beeinflussung mesolimbischer dopaminer…

Luftverschmutzung als wichtiger Kofaktor bei COVID-19-Sterbefällen

2021

Zusammenfassung Hintergrund Die Sterblichkeit bei COVID-19 ist in Anwesenheit kardiopulmonaler Komorbiditäten erhöht. Luftverschmutzung ist ebenfalls mit einer erhöhten Sterblichkeit assoziiert, v. a. vermittelt durch kardiopulmonale Erkrankungen. Beobachtungen zu Beginn der COVID-19-Pandemie zeigten, dass die Sterblichkeit bei COVID-19 v. a. in Regionen mit stärkerer Luftverschmutzung erhöht ist. Ungeklärt ist der Einfluss von Luftverschmutzung für den Krankheitsverlauf bei COVID-19. Methode Es wurde eine selektive Literaturrecherche von Studien bis Anfang April 2021 in PubMed zum Zusammenhang von Luftverschmutzung und der COVID-19-Mortalität mit den Suchbegriffen „air pollution AND/OR COV…

The effects of anthropogenic particulate emissions on roadway dust and Nerium oleander leaves in Messina (Sicily, Italy)

2003

Complementary studies on the inorganic chemical composition of Nerium oleander leaves collected in the town of Messina (Sicily, Italy) and seven grain-size fractions of local roadway dust have been carried out. Data and maps are presented to show that the particulate matter present in the air of Messina contains trace elements significantly in excess with respect to the average continental earth crust. The anomalies follow the outline of the urban area, the highest concentrations of trace elements being observed where traffic density is highest. Chemical and isotopic analyses of both road dust and Nerium oleander leaves indicate that Pb contamination still characterizes roads with heavy tra…

Sostenibilidad empresarial y estrategias de divulgación de huella de carbono

2021

El cambio climático es uno de los mayores desafíos medioambientales en los actuales momentos, su creciente aceptación como una de las cuestiones más urgentes en el mundo, a nivel social, político y empresarial ha llevado a las organizaciones a introducir mecanismos de control y mitigación ambiental como parte de sus compromisos adquiridos, siendo uno de ellos la divulgación sobre emisiones de carbono. En este sentido, el sector empresarial, como ente dinamizador de las economías de todo el mundo, es uno de los principales agentes en la lucha contra el cambio climático; por otro lado, a pesar del aumento de la divulgación de GEI, hay aún evidencias relativamente escasas en la literatura de l…

Preliminary results of systematic sampling of gas manifestations in geodynamically active areas of Greece

2016

Greece is located on a convergent plate boundary comprising the subduction of the African Plate beneath the Eurasian, while the Arabian plate approaches the Eurasian in a northwestward motion. It is considered to be one of the most tectonically active regions of Earth with a complex geodynamic setting, deriving from a long and complicated geological history. Due to this specific geological background, conditions for the formation of many thermal springs are favoured. In the past years, almost all the already known sites of degassing (fumaroles, soil gases, mofettes, gas bubbling in cold and thermal waters) located in the Hellenic area were sampled at least one time. Collected samples were a…

Study of exotic decay of Cs isotope close to the proton drip line

2020

6 pags., 6 figs. -- 27th International Nuclear Physics Conference (INPC2019) 29 July - 2 August 2019, Glasgow, UK