Time-of-flight secondary ion mass spectrometry (TOF-SIMS) analyzes chemical information by measuring ions generated via bombardment of an energetic ion beam on the surface of a specimen. Negative hydrocarbon ion species of C2nH are ubiquitous in TOF-SIMS for any hydrocarbon-containing materials, but their utilities are perhaps not fully explored. Using polyethylene, polypropylene, polyisoprene,...

Time of flight-secondary ion mass spectrometry (ToF-SIMS) is a SIMS based surface sensitive technique that provide specific compound identification molecules. Recently, the importance ToF-SIMS has grown for characterization and utilization polymers, pharmaceuticals, semi-conductors. The specificity distinguishes it from other techniques such as X-ray photoelectron spectroscopy (XPS), Auger elec...

Single-ion magnets (SIMs) are mononuclear molecular complexes exhibiting slow relaxation of magnetization. They are currently attracting a lot of interest because of potential applications in spintronics and quantum information processing. However, exploiting SIMs in, e.g. molecule-inorganic hybrid devices requires a fundamental understanding of the effects of molecule-substrate interactions on...

Time-of-flight secondary ion mass spectrometry (TOF-SIMS) was introduced into cosmochemistry about a decade ago. Major advantages of TOF-SIMS compared to other ion microprobe techniques are (a) parallel detection of all secondary ions with one polarity in a single measurement – both polarities in subsequent analyses, (b) high lateral resolution, (c) sufficient mass resolution for separation of ...

Charles Sims suggested that this should be true in [11]. Much work has been done since—see for instance the papers of Thompson [15], Wielandt [17] and Knapp [6]. In particular, Thompson proved in [15] the existence of a function g such that for any G as above there is a prime p and a normal p-subgroup P of G with |Ga: P\ ^ g(d). Nevertheless, the conjecture has remained open until now. As a con...

A hybrid quadrupole orthogonal time-of-flight mass spectrometer optimized for matrix-assisted laser desorption ionization (MALDI) and electrospray ionization has been equipped with a C 60 cluster ion source. This configuration is shown to exhibit a number of characteristics that improve the performance of traditional time-of-flight secondary ion mass spectrometry (TOF-SIMS) experiments for the ...

Objective—To develop and examine the psychometric properties of the Satisfaction with Information about Medicines Scale (SIMS), a new 17-item tool designed to assess the extent to which patients feel they have received enough information about prescribed medicines. Methods—Patients from eight diagnostic categories were recruited at hospitals in London and Brighton and completed the SIMS questio...

BACKGROUND The thyroid's ability to enrich and store iodine has implications for thyroid cancer genesis, progression, and treatment. The study objective was to investigate thyroid iodine content (TIC) in tumoral and extratumoral tissue in patients with papillary thyroid cancer (PTC) as opposed to thyroid healthy controls using two different techniques: X-ray fluorescence (XRF) and time-of-fligh...

OBJECTIVE To develop and examine the psychometric properties of the Satisfaction with Information about Medicines Scale (SIMS), a new 17-item tool designed to assess the extent to which patients feel they have received enough information about prescribed medicines. METHODS Patients from eight diagnostic categories were recruited at hospitals in London and Brighton and completed the SIMS quest...