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Comparisons have revealed large discrepancies among the many methods for measuring soil CO2 efflux indicating the need for an absolute calibration of methods. This study presents a calibration system, constructed to imitate an area of soil, and its application to two different chamber systems for the measurement Of Soil CO2 efflux: one open and one closed dynamic. Air rich in CO2 was allowed to di

The decision to begin eating or to stop eating is a complex process. Hunger is primarily driven by hunger signals, like ghrelin and neuropeptide Y, originating from the gastrointestinal tract and from the hypothalamus. The hunger signals stimulate the seeking of food and the eating, being activating for the body and mind. Thirty minutes after the start of eating, satiety signals arise from the int

Box jellyfish carry an elaborate visual system consisting of 24 eyes, which they use for driving a number of behaviours. However, it is not known how visual input controls the swimming behaviour. In this study we exposed the Caribbean box jellyfish Tripedalia cystophora to simple visual stimuli and recorded changes in their swimming behaviour. Animals were tethered in a small experimental chamber,

We study broadcasting, also known as one-to-all communication, in synchronous radio networks with known topology modeled by undirected (symmetric) graphs, where the interference range of a node is likely exceeding its transmission range. In this model, if two nodes are connected by a transmission edge they can communicate directly. On the other hand, if two nodes are connected by an interference e

1. The sense of smell is crucial for fitness of most animals, enabling them to find mates, food and egg laying sites and to stay away from danger. Hence, odour molecules are detected by sensitive and specific olfactory sensory neurons (OSNs). In insects, the OSNs are stereotypically grouped into olfactory sensilla located mainly on the antennae. The functional significance of this co-localization

Heterogeneous parallel systems are becoming mainstream computing platforms nowadays. One of the main challenges the development community is currently facing is how to fully exploit the available computational power when porting existing programs or developing new ones with available techniques. In this direction, several design space exploration methods have been presented and extensively adopted

Popular Abstract in Swedish Denna avhandling är en dokumentation av mina undersökningar av det rumänska ordet. Jag har som allmänlingvist undersökt några aspekter av det rumänska ordet fonologiskt, fonetiskt och semantiskt. Det finns också mycket skrivet om morfologin i rumänska. Man är väl medveten om att en del suffix tar betoning och andra inte. Men ingen har utnyttjat denna kunskap för att sys

Nematode-trapping fungi are soil living organisms with the ability to infect and kill nematodes. These fungi have developed specialized infection structures, traps for the capture of nematodes. To be able to identify genes in nematode-trapping fungi that are involved in the infection of nematodes cDNA microarrays were constructed. The cDNA microarrays were printed with cDNA reporers obtained from

This case book has been compiled within the framework of Phase III of the programme on Regional Air Pollution in Developing Countries (RAPIDC) funded by the Swedish International Development Cooperation Agency (Sida) and coordinated by the Stockholm Environmental Institute (SEI). This work has been produced by the International Institute of Industrial Environmental Economics (IIIEE) at Lund Univer

Popular Abstract in Swedish Enzymer är viktiga ämnen i naturen. Vi talar då och då om att vi förbränner vår mat. Trots detta känner vi oss oftast inte särskilt varma, i alla fall inte så att det bränns. Visst bränner vi vår mat. Socker omvandlas till koldioxid och vatten precis som om vi hade eldat upp det utanför kroppen. Skillnanden är att kroppen omvandlar sockret långsammare och mer kontrollerWith the goal to study the mechanisms of dinuclear metalloenzymes, a new line of synthetic and computational models were prepared and studied. Mixed imidazole and carboxylate multidentate complexes were synthesized to better simulate carboxylate-rich ligand environments. Of the compounds, which showed to be the most useful, were one symmetric and the other one asymmetric and in both cases they wer

Popular Abstract in Swedish För att levande celler ska kunna föröka sig behöver förr eller senare celldelning ske. Detta är en process där en ny cell skapas utifrån den information som finnas lagrad i ursprungscellen. Denna typ av information lagras i cellens DNA. En stor del av DNA:t är ritningar för hur cellens arbetarmolekyler, proteinerna, ska byggas men DNA:t innehåller även information för rIt has been more than 50 years since the enzyme system ribonucleotide reductase (RNR), catalysing the reduction of ribonucleotides to deoxyribonucleotides, was first discovered. RNR was also the first time that radical chemistry was revealed in an enzyme. RNRs carry out a key step in the de novo synthesis of building blocks for DNA and have been found in almost all known organisms. Within this th

Popular Abstract in Swedish Artrit karakteriseras av svullnad och värk i leder, ledförstöring och bindvävsförstoring. Denna binvävsförstoring kallas för Pannus och är en förtjockning av det normalt förekommande synovial membranet i en led. Normalt är synovial membranets uppgift att ge näring åt det intilliggande brosket som inte självt har någon blodförsörjning. Synovial membranet innehåller också

Popular Abstract in Swedish Kalcium är ett livsviktigt ämne för både djur och växter. Kalcium behövs t.ex. för uppbyggnaden av skelettet, för att hjärtat skall slå och för att musklerna skall dras samman. I växter är kalcium en viktig beståndsdel i cellväggarna och behövs också vid bl.a. celldelning. Trots detta måste koncentrationen av fria kalciumjoner inne i cellen (i cellvätskan) hållas mycketThe calcium ion (Ca2+) is essential for all plant and animal life. One important function of Ca2+ is as a second messenger in the responses of the cell to environmental and hormonal signals as well as in some intrinsic developmental processes. The intracellular concentration of Ca2+ must be strictly regulated, since a high concentration of free cytosolic Ca2+ is toxic. All eukaryotic cells carry c

In a preliminary study aimed at outlining the organization of affective categories in Romanian, several cases were identified where Romanians made use of two or more competing linguistic terms applied to what appeared to be the same conceptual configuration . One such case is taken into consideration in this 5-study follow-up investigation, whose purpose was to obtain empirical data for establishi

Parkinson’s disease is one of the most common neurodegenerative diseases, and affects approximately 1% of the population over 65 years of age. Many different insults appear to be involved in the etiology of the disease, among them environmental toxins and mitochondrial dysfunction. During the past five years, mutations in five different genes have been linked to rare, familial forms of Parkinson’s

The first experimental study of focusing synchrotron radiation by a parabolic planar glassy-carbon lens is presented. The lens consists of four biconcave single lenses with a curvature radius of 0.2 mm and a relief height comparable with the lens aperture (similar to1 mm). One lens gives rise to the formation of a linear focus with a length comparable with the height of a parabolic profile. The us