This paper describes the application of nanoparticle bombardment with time-of-flight secondary ion mass spectrometry (NP-ToF-SIMS) for the analysis of native biological surfaces for the case of sagittal sections of mammalian brain tissue. The use of high energy, single nanoparticle impacts (e.g. 520 keV Au400) permits desorption of intact lipid molecular ions, with enhanced molecular ion yield ...

Recent experiments by the HERMES group at HERA are measuring semiinclusive electroproduction of pions from deuterium. We point out that by comparing the production of π and π from an isoscalar target, it is possible, in principle, to measure charge symmetry violation in the valence quark distributions of the nucleons. It is also possible in the same experiments to obtain an independent measurem...

The influence of nuclear effects on the transverse momentum (pT ) distributions of neutrinoproduced hadrons is investigated using the data obtained with SKAT propanefreon bubble chamber irradiated in the neutrino beam (with Eν = 3-30 GeV) at Serpukhov accelerator. Dependences of < p2T > on the kinematical variables of inclusive deep-inelastic scattering and of the produced hadrons are measured....

The measurement of the so far unknown chiral-odd quark transverse spin distribution in either semi-inclusive DIS (SIDIS) or inclusive measurements in pp collisions at RHIC has an additional chiral-odd fragmentation function appearing in the cross section. This chiral-odd fragmentation functions (FF) can for example be the so-called Collins FF [1] or the Interference FF. HERMES [2] has given a f...

We discuss the recent status of some penetrating electromagnetic probes of relativistic nuclear collisions, and the information contained in their measurement. We concentrate in turn on sources that produce high pT photons: those of purely thermal origin, those producing direct photons, those related to jet fragmentation, and those associated with the interaction of jets with the colored plasma...

Photon radiation at large transverse momenta at colliders is a detailed probe of hard interaction dynamics. The isolated photon production cross section in deep inelastic scattering was measured recently by the ZEUS experiment, and found to be considerably larger than theoretical predictions obtained with widely used event generators. To investigate this discrepancy, we perform a dedicated part...

Mass spectrometry is one of the key enabling measurement technologies for systems biology, due to its ability to quantify molecules in small concentrations. Tandem mass spectrometers tackle the main shortcoming of mass spectrometry, the fact that molecules with an equal mass-to-charge ratio are not separated. In tandem mass spectrometer molecules can be fragmented and the intensities of these f...

Charm fragmentation and dijet angular distributions have been measured in D photoproduction at HERA. Charm fragmentation and its property of universality is evaluated in terms of measurement of Pv, the ratio of vector/(vector + pseudoscalar) mesons. Angular distributions of dijets, with at least one of the jets associated with a D meson, have been measured for samples enriched in direct or reso...

Recent experiments by the HERMES group at HERA are measuring semiinclusive electroproduction of pions from deuterium. We point out that by comparing the production of π and π− from an isoscalar target, it is possible, in principle, to measure charge symmetry violation in the valence quark distributions of the nucleons. It is also possible in the same experiments to obtain an independent measure...

A network of optical disdrometers (including laser precipitation monitors and a two-dimensional video disdrometer) was utilized to determine whether the recent reports of “superterminal” raindrops were spurious results of drop breakup occurring on instrumentation. Results unequivocally show that superterminal raindrops at small (less than 1 mm) sizes are ubiquitous, are measurable over an exten...