Sökresultat

Popular Abstract in Swedish Förståelse av väldigt snabba proceeser i molekyler utgör grunden inom modern kemi. Jonisation och excitation av en molekyl med en foton startar en nukleär dynamisk process som åtföljs av elektroniskt sönderfall och fragmentering av molekylen. En rörelsemändsvektor-spektrometer har utveclats som används för att mäta massa, laddning, energi och hastighet av joniska fragmeA momentum imaging spectrometer optimized for photoionization experiments with synchrotron radiation was built in 2008. The spectrometer is equipped with an electrostatic lens, that focuses the charged dissociation products on to a position-sensitive multi-hit delay line anode. The possibility of focusing is essential for most applications, where fragment momentum is to be extracted. The apparatus

Changes in technologies which have put computing power on the desktop over the past 25 years give an impression of increased empowerment for the end-user when compared to previous generations of hardware and software. However, in practice, latest developments in desktop computing and related technologies have led to more and more centralized control of ‘end-users’ workspaces. This phenomenon leads

The design of an ultra-low-leakage latch, suitable for subthreshold standard-cell based memories in 65nm CMOS is presented. Various latch architectures are compared in terms of leakage, area and speed. The most leakage-efficient architecture is optimized by transistor stacking and channel length stretching. The final design is supplemented with a 3-state output buffer to provide low-leakage read f

In this work we have demonstrated a peptide functionalized cantilever sensor with integrated electrochemical capabilities. Silicon nitride cantilevers with gold electrodes are functionalized with the chelating peptide Cys-Gly-Gly-His (CGGH) to capture Cu2+ ions from solution. Upon binding the copper ion the peptide folds, creating steric hindrance and causing compressive stress in the monolayer, d

Popular Abstract in Swedish Alla organismer som använder syre har i sina celler en s. k. elektrontransportkedja för att generera energi. Kedjan består av enzymer som sitter i mitokondriens inre membran eller i bakteriens membran. Enzymerna genomgår oxidation och reduktion när elektronerna passerar genom kedjan. Då genereras energi som kan användas för olika processer, t. ex. transport av ämnen in The final step in aerobic respiratory pathways is catalyzed by terminal oxidases. Bacteria generally have two or more terminal oxidases. Aerobically grown Bacillus subtilis synthesize three terminal oxidases: one cytochrome c oxidase, cytochrome caa3 and two quinol oxidases, cytochrome aa3 and cytochrome bd. In addition, a fourth cytochrome of bd-type has been predicted from the genome sequence. C

This research is an attempt to conceptualize the underlying forces behind persistent and ubiquitous problems of inequality in access to water in cities of the global south. Inequality in water access is hypothesized to result from urban water regimes that tend to prioritize the right to water access or to provide preferential terms of access for some groups in society, while marginalizing others.

Moraxella catarrhalis is a major cause of exacerbations of chronic obstructive pulmonary disease (COPD) and emphysema. M. catarrhalis–specific UspA1 and the epithelial carcinoembryonic antigen-related cell adhesion molecule (CEACAM1) were required to induce apoptosis. M. catarrhalis–induced apoptosis was significantly enhanced in HeLa cells stably transfected with CEACAM1, compared with HeLa cells

Folktraditioner om igelkotten

To address the hypothesis of brain dysfunction as a component of the multiple chemical sensitivity (MCS) syndrome, a neuropsychological battery comprising 8 tests was given to 17 Swedish MCS patients and 34 demographically matched controls. Across the 6 tests used as indicators of brain impairment, comprising a total of 17 test variables, the MCS group performed poorer only in a complex reaction t