Search results

The interaction between UV-B irradiation and cutaneous human papillomaviruses (HPV) has been suggested to be of relevance for the development of non-melanoma skin cancers. We investigated the activity within the upstream regulatory region (URR) of the HPV types 8, 38, 92, 93 and 96, as well as their responsiveness to UV-B irradiation and cellular differentiation. Promoter activities were higher in

Previous work on intact thylakoid membranes showed that transient formation of a zeaxanthin radical cation was correlated with regulation of photosynthetic light-harvesting via energy-dependent quenching. A molecular mechanism for such quenching was proposed to involve charge transfer within a chlorophyll-zeaxanthin heterodimer. Using near infrared (880 - 1100 nm) transient absorption spectroscopy

Controlled formation of non-equilibrium crystal structures is one of the most important challenges in crystal growth. Catalytically grown nanowires are ideal systems for studying the fundamental physics of phase selection, and could lead to new electronic applications based on the engineering of crystal phases. Here we image gallium arsenide (GaAs) nanowires during growth as they switch between ph

There was a substantial trade in furs throughout the medieval period, as indicated by a number of written sources. The archaeological evidence for this trade is, however, scant. The discovery of furriers’ workshops depends to a significant extent on the large-scale sieving of soil samples, since most bones from fur-bearing species are small. As large-scale sieving for small bones is not often unde

Among the issues relating to the needs of citizens with reduced functional capacity, accessibility problems throughout society are gaining interest. The focus of this paper is on methodology for assessment of urban public bus transport accessibility. The aims are to describe the development of a pilot version of a new instrument, the Travel Chain Enabler, and to identify problems to target for fur

The urokinase-type plasminogen activator receptor (uPAR) is a non-integrin vitronectin (VN) cell adhesion receptor linked to the plasma membrane by a glycolipid anchor. Through structure-function analyses of uPAR, VN and integrins, we document that uPAR-mediated cell adhesion to VN triggers a novel type of integrin signalling that is independent of integrin-matrix engagement. The signalling is ful

Dispersai from the centre o f the breeding range of the BalticGreylag Goose Anser anser was studied using observationsof individuals with neck collars. The median natal dispersal distance was 0 km in females and 25 km in mates, respectively. A ll of the females recruited to w ith in7 km o f where they had been reared, 87% to the natal lake and 11% toneighbouring water bodies. Of the mates, only 11

Urban densification is a way of accommodating population growth. Land adjacent to railways is used for constructing residences and other buildings, and new tramway systems are planned. Under these circumstances, nearby buildings will be exposed to vibrations and noise that may become a nuisance for the residents. It is necessary, even at an early stage of planning, to assess the extent of the vibr

After having emerged as primary contenders in the race for highly efficient optoelectronics materials, organolead halide perovskites (OHLP) are now being investigated in the nanoscale regime as promising building blocks with unique properties. For example, unlike their bulk counterpart, quantum dots of OHLP are brightly luminescent, owing to large exciton binding energies that cannot be rationaliz

In most studies on technology change, the analysis of cost reductions of new energy technologies has been narrow and has often neglected essential processes related to the deployment of new technologies, such as photovoltaics (PV). However, in the case of distributed PV systems, other costs than for the PV modules – aka the deployment or balance-of-system costs – are significant. This review study

β-Glucan benefits are related with its molar mass and it would be of interest to better understand how this parameter can be changed by processing and variety for design of food with specific health effects. For this purpose, extracts from barley malts and brewers' spent grain, processed at different conditions, were analysed regarding β-glucan content, molar mass, and protein content. Molar mass

Methane (CH4) emissions from arctic tundra typically follow relations with soil temperature and water table depth, but these process-based descriptions can be difficult to apply to areas where no measurements exist. We formulated a description of the broader temporal flux pattern in the growing season based on two distinct CH4 source components from slow and fast-turnover carbon. We used automatic

Thermal cleaning in ultrahigh vacuum of ZnO nanocrystals distributed on SiO2/Si surfaces has been studied using spectroscopic photoemission and low energy electron microscopy (SPELEEM). This study thus concern weakly bound ZnO nanocrystals covering only 5%-10% of the substrate. Chemical properties, crystallinity, and distribution of nanocrystals are used to correlate images acquired with the diffe

The scheme presently envisaged for the EURO50 adaptive optics ispresented. The Euro50 adaptive optics will primarily work with laserguide stars (LGSs) and control of either one or two deformable mirrors(SCAO and DCAO respectively), but operation using a natural guide star(NGS) is also foreseen. The point spread function (PSF) for SCAOoperation using a single NGS is evaluated. An algorithm for opti

Households play a crucial role in the management of waste electrical and electronic equipment (WEEE). As waste generators, their decisions at the point of disposal hold a key to a success of WEEE collection. This article presents main findings from a national survey in Thailand about the reported disposal behaviors in the past and the stated disposal preferences in the future. The survey covered t