Search results for "OMAS"
showing 10 items of 1725 documents
Evaluation of plankton communities in small highly humic bog lakes in Latvia
1998
This paper reports the results of a study performed at the Teici State Reserve in Latvia The results indicated that algal communities in brown water lakes were formed by species that were tolerant to a low pH and high humic substance concentration. The composition of the species of phytoplankton and zooplankton was comparatively simple. A significant correlation was found between the number of species of phytoplankton, zooplankton, and the pH value. Similarly there was a clear relationship between the taxonomic composition of phytoplankton, zooplankton, and the trophic state of the lakes. Dyseutrophic lakes were characterized by comparatively higher biodiversity of planktonic communities th…
Modelling the shrub encroachment in a grassland with a Cellular Automata Model
2018
Abstract. Arid and semi-arid grasslands of southwestern North America have changed dramatically over the last 150 years as a result of shrub encroachment, i.e. the increase in density, cover and biomass of indigenous shrubby plants in grasslands. Numerous studies have documented the expansion of shrublands in the southwestern American grasslands; in particular shrub encroachment has occurred strongly in part of the northern Chihuahuan desert since 1860. This encroachment has been simulated using an ecohydrological Cellular Automata model, CATGraSS. It is a spatially distributed model driven by spatially explicit irradiance and runs on a fine-resolution gridded domain. Plant competition is m…
Including vegetation dynamics in an atmospheric chemistry-enabled general circulation model: linking LPJ-GUESS (v4.0) with the EMAC modelling system …
2020
Central to the development of Earth system models (ESMs) has been the coupling of previously separate model types, such as ocean, atmospheric, and vegetation models, to address interactive feedbacks between the system components. A modelling framework which combines a detailed representation of these components, including vegetation and other land surface processes, enables the study of land–atmosphere feedbacks under global climate change. Here we present the initial steps of coupling LPJ-GUESS, a dynamic global vegetation model, to the atmospheric chemistry-enabled atmosphere–ocean general circulation model EMAC. The LPJ-GUESS framework is based on ecophysiological processes, such as phot…
Fish Welfare in Aquaponic Systems: Its Relation to Water Quality with an Emphasis on Feed and Faeces—A Review
2017
Aquaponics is the combination of aquaculture (fish) and hydroponic cultivation of plants. This review examines fish welfare in relation to rearing water quality, fish feed and fish waste and faeces to develop a sustainable aquaponic system where the co-cultured organisms, fish, bacteria in biofilters and plants, should be considered holistically in all aquaponics operations. Water quality parameters are the primary environmental consideration for optimizing aquaponic production and for directly impacting fish welfare/health issues and plant needs. In aquaponic systems, the uptake of nutrients should be maximised for the healthy production of the plant biomass but without neglecting the best…
La traducció catalana de la «Història de les Amors de París e Viana»
2007
The text of the three Catalan editions of «Història de les amors de París i Viana», published in Barcelona and Girona in the last decade of the fifteenth century, shows a linguistic orientation towards Castilian and Italian onomastics. It has led to postulate two hypotheses on its textual dependence: a Castilian origin and an Italian origin. A revision of the text as translation and adaptation for the printing allows to ascertain the confluence of two linguistic layers: one, of the first half of the fifteenth century, which explains the persistence of archaic features and the Italian onomastics, and another, contemporary with the edition, which accounts for the Castilian orientation of the …
Quan el traductor és sobretot escriptor: el cas de la traducció d'«El guepard» de Tomasi di Lampedusa
2013
Aquest article exposa, en primer lloc, les relacions entre l’escriptor sicilià Tomasi di Lampedusa i el mallorquí Llorenç Villalonga. L’anàlisi de les afinitats i les divergències estilístiques entre els dos autors té com a objectiu l’estudi descriptiu de la traducció catalana de la novel·la Il Gattopardo, a fi de destacar les estratègies adoptades pel traductor Villalonga i els canvis que suposen en comparació amb l’original. L’estudi intenta buscar les raons dels canvis en la poètica pròpia del traductor i arriba a la conclusió que, en la traducció de Il Gattopardo, va tenir un pes notable el diferent plantejament estilístic entre els dos autors: gras i barroc, Lampedusa; prim i essencial…
Hazardous air pollutants and primary liver cancer in Texas.
2016
The incidence of hepatocellular carcinoma (HCC), the most common primary liver cancer, is increasing in the US and tripled during the past two decades. The reasons for such phenomenon remain poorly understood. Texas is among continental states with the highest incidence of liver cancer with an annual increment of 5.7%. Established risk factors for HCC include Hepatitis B and C (HBV, HCV) viral infection, alcohol, tobacco and suspected risk factors include obesity and diabetes. While distribution of these risk factors in the state of Texas is similar to the national data and homogeneous, the incidence of HCC in this state is exceptionally higher than the national average and appears to be di…
Effects of Briquetting and High Pyrolysis Temperature on Hydrolysis Lignin Char Properties and Reactivity in CO-CO2-N2 Conditions
2021
Carbonaceous reductants for pyrometallurgical applications are usually obtained from fossil-based sources. The most important properties of the reductants greatly depend on the application and the feeding of the reductant into the process. However, the mechanical strength, calorific value, fixed carbon content, and reactivity of the reductant are the properties that usually define the applicability of the reductant for different processes. The reactivity of the biochars is usually high in comparison to metallurgical coke, which may restrict the applicability of the biochar in reduction processes. One cause of the higher reactivity is the higher surface area of the biochars, which can be sup…
Strategie autofinzionali in "Leggenda privata" di Michele Mari
2019
Leggenda privata (2017) is the latest in a series of autobiographical writings by Michele Mari. The novel is the factual narration of the author's childhood and adolescence, documented by family photos, but is also the narration of a fictional and fantastic situation of writing, where the reader is involved in live recording. In particular, the narrative framework is structured almost like a personal essay that engages dialogically the norms and potentials, opportunities and risks of a theory of autobiography. The purpose of this article is to explore the limits, the difficulties, indeed the impossibility of autobiographical writing in Leggenda Privata, which instead verges towards a comple…
Influence of Biomass Combustion Products on Element Content and Thermal Stability of Latvian Sheep Breed Wool Filter Fibres
2020
Sheep wool is natural, easy obtainable, renewable and biodegradable material with a perspective application as a sorbent in filters for purification of industrial emissions from various environmental pollutants. The element content and thermal stability of Latvian dark-headed sheep wool filter fibres was analysed and described before and after exposure to biomass combustion products. Based on the obtained results, it is concluded that the sheep wool filter fibres can sorb various gaseous combustion products, such as carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx), however, the sorption processes of these gases are irreversible. The obtained results of total reflection X…