In the search for high efficiency combustion systems pulsating combustion has been identified as one of the technologies that potentially can meet the objectives of clean combustion and good fuel economy.Pulsating combustion offers low emissions of pollutants, high heat transfer and efficient combustion. Although it is an old technology, the interest in pulsating combustion has been renewed in rec

Popular Abstract in Swedish Bröstcancer är den vanligast förekommande cancerformen hos kvinnor och årligen drabbas ungefär 6000 kvinnor i Sverige. I de flesta fall uppstår bröstcancer spontant, men viss ärftlighet ligger bakom ca 10 % fallen. Det finns kopplingar till faktorer som ökar risken för bröstcancer. Till riskfaktorer hör bl.a. långvarig exponering för hormoner: tidig mens och sent klimakUnrestrained proliferation is a hallmark of cancer and genetic defects within G1/S-phase regulation and the pRb pathway occur frequently. Proliferation control can be circumvented either by excess cyclin D1 or cyclin E, alterations that can define two alternative tumour biologic pathways in breast cancer. By overexpressing cyclin E in a cell line model system we demonstrate that the capacity of ce

BACKGROUND: Intestinal inactivity leads to atrophic changes and concomitant alterations in the expression of neurotransmitters in the enteric nervous system. In atrophic rat ileum neurones expressing vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating peptide (PACAP) decrease in number while nitric oxide synthase (NOS) expressing neurones increase. Since little is known

In vision-based feedback control systems, the time to obtain sensor information is usually non-negligible, and these systems thereby possess fundamentally different timing behavior compared to standard real-time control applications. For many image-based tracking algorithms, however, it is possible to trade-off the computational time versus the accuracy of the produced position/orientation estimat

In the 1940s, Swedish poetry saw the breakthrough of modernism. With the modernist style came a new kind of poetic aspiration towards the condition of music: semantic imitations of musical genres and attempts to create, with the help of the words' associations, an aesthetic effect similar to a musical effect. This type of intermediality, which I call semantic musicality, was inherited as a norm of

Planar lung scintigraphy is a standard method used for the diagnosis of lung embolism, but it is hampered by the high incidence of nondiagnostic tests. Ventilation/perfusion SPECT may possibly improve this situation. The objective of this study was to compare planar lung scintigraphy with ventilation/perfusion SPECT using pigs with artificially engendered lung emboli labeled with (201)Tl. METHODS:

International standardization and coordination of the nomenclature of variants of hepatitis C virus (HCV) is increasingly needed as more is discovered about the scale of HCV-related liver disease and important biological and antigenic differences that exist between variants. A group of scientists expert in the field of HCV genetic variability, and those involved in development of HCV sequence data

Two new antimicrobial metabolites, zopfiellamides A (1) and B (2) were isolated from fermentations of the facultative marine fungus Zopfiella latipes CBS 611.97. Their structures were elucidated by spectroscopic techniques, and they are pyrrolidinone derivatives. (C) 2002 Elsevier Science Ltd. All rights reserved.

Knowledge of the mechanisms behind prey selection in piscivorous fish is important for our understanding of the dynamics of freshwater systems. Prey selection can involve active predator choice or be a passive process. We experimentally studied size-selectivity in pikeperch, feeding on roach and rudd. When given a choice of different prey sizes, pikeperch selected small prey. Passive selection mec

When plant tissue is wounded a number of protective processes start. We have made a study by isothermal calorimetry of the heat production response of root and tuber tissue to wounding. Samples with different surface to volume ratios were prepared from carrots, potatoes and swedes (rutabaga) and the thermal power was measured in closed glass ampoules in a TAM Air isothermal calorimeter. The evalua

OBJECTIVE: To assess prevalence figures for psychiatric disorders among institutionalized adolescents due to behavioural problems and/or delinquency. METHOD: Participants were recruited from consecutive referrals to/or treated at two Swedish adolescent units, SIS1 (n = 60) and SIS2 (n = 70) with ranging age of 12-20.3 years (mean age = 16.2; SD = 1.8) during 1 year. Clinical and diagnostic info

This study investigates the syntax, semantics and information structure of it-cleft constructions in German and Swedish. The syntactic analysis is presented within a standard framework of generative theory. In defining genuine cleft constructions, both the syntactic and the semantic structures of clefts are taken into consideration. Here, it proves essential to distinguish between different kinds

L-Arabinose utilization by the yeasts Candida arabinofermentans PYCC 5603(T) and Pichia guilliermondii PYCC 3012 was investigated in aerobic batch cultures and compared, under similar conditions, to D-glucose and D-xylose metabolism. At high aeration levels, only biomass was formed from all the three sugars. When oxygen became limited, ethanol was produced from D-glucose, demonstrating a fermentat