Search results

Filter

Filetype

Your search for "*" yielded 537593 hits

Risks and possibilities in patch testing with contaminated personal objects: usefulness of thin-layer chromatograms in a patient with acrylate contact allergy from a chemical burn

We report a case of a chemical burn from dipropylene glycol diacrylate (DPGDA) spilt on working shoes, followed by active sensitization, thus giving an occupational allergic contact dermatitis on the patient's dorsal feet. Diagnostic tests included patch testing with acetone extracts made from the different shoe layers and thin-layer chromatograms. An invisible spot on the thin-layer chromatograph

Electrochemistry and kinetics of fungal laccase mediators

The screening of potential redox mediators for laccase was performed using homogeneous Trametes hirsuta laccase. Heterogeneous (electrochemical) and homogeneous (oxidation by laccase) reactions of the different types of the enhancers (mediators) of the enzyme were investigated. It was discovered that derivatives of phenyl-methyl-pyrazolones and benzoic acid, as well as N-hydroxynaphthalimide were

Environmental impact of undular tidal bores in tropical rivers

A tidal bore impacts significantly on the estuarine ecosystem, although little is known on the flow field, mixing and sediment motion beneath tidal bores. In the absence of detailed systematic field measurements, a quasi-steady flow analogy was applied to investigate undular tidal bores with inflow Froude numbers between 1.25 and 1.6. Experimental results indicated that rapid flow redistributions

Simulating marine boundary layer clouds over the eastern Pacific in a regional climate model with double-moment cloud microphysics

A double-moment cloud microphysics scheme with a prognostic treatment of aerosols inside clouds has been implemented into the International Pacific Research Center Regional Atmospheric Model (iRAM) to simulate marine boundary layer clouds over the eastern Pacific and to study aerosol-cloud interactions, including the aerosol indirect effect. This paper describes the new model system and presents a

Systemic endotoxin administration results in increased S100B protein blood levels and periventricular brain white matter injury in the preterm fetal sheep

Objective: Intrauterine infection is suggested to cause perinatal brain white matter injury. The aim of the present study was to clarify, whether intravenous application of endotoxin results in neuropathological findings and increased blood levels of the S100B protein, which is a consolidated marker of brain injury. Methods: Twenty-one fetal sheep were chronically catheterized at a mean gestationa

Involvement of sympathetic nerve activity in skin blood flow oscillations in humans.

We have used the wavelet transform to evaluate the time-frequency content of laser-Doppler flowmetry (LDF) signals measured simultaneously on the surfaces of free microvascular flaps deprived of sympathetic nerve activity (SNA), and on adjacent intact skin, in humans. It was thereby possible to determine the frequency interval within which SNA manifests itself in peripheral blood flow oscillations

Lifetimes of 5d96p and 5d86s6p levels in Hg iii

Experimental and theoretical studies of lifetimes and transition probabilities for doubly ionized mercury, Hg III, are reported. Such data are currently of great astrophysical interest because observations with the Goddard high resolution spectrograph on board the Hubble space telescope have shown some 5d(9)6s-5d(9)6p transitions of Hg III in the spectrum of the chemically peculiar star chi Lupi.

Speciation by perception

During sympatric and parapatric speciation the diverging populations maintain geographical contact throughout the speciation process. In theoretical models an isolating mechanism, such as assortative mating, is usually needed to obtain genetic separation of populations in contact. We simplified the visual appearance of the crows that occur in the crow hybrid zone in Europe, the carrion crow, Corvu

Radiation detector resolution over a continuous energy range

An ion approach is demonstrated to determine energy resolution in both semiconductor detectors and scintillators over a continuous energy range. For semiconductors, the energy resolution of a silicon detector was measured as a function of helium ion energy, and the values from extrapolation to high energies are in good agreement with the literature data from alpha measurements. For scintillators,

Liquid-liquid partitioning of some enzymes, especially phosphofructokinase, from Saccharomyces cerevisiae at sub-zero temperature

The effects of low temperature (-18oC) on the stability and partitioning of some glycolytic enzymes within an aqueous two-phase system were studied. The enzymes were phosphofructokinase, glyceraldehyde-3-phosphate dehydrogenase and alcohol dehydrogenase present in a crude extract of bakers' yeast. The partitioning of pure phosphofructokinase, isolated from bakers' yeast, was also examined. The two

Hydrogen bond control of dimensionality in organometallic {2,6-Bis[(di-t-butylphosphino)methyl]phenyl}palladium(II) compounds: Dimers, chains, and a 3D-net with an apparent channel structure

A number of derivatives of {2,6-bis[(di-t-butylphosphino)methyl]phenyl}palladium(II)(PCPPd) have been synthesized and characterized by X-ray diffraction, namely, PCPPdNO3 (3), PCPPdOH hydrate (4), and PCPPdNO2 pentane solvate (5). These compounds share a rigid backbone and have about 75 atoms each whereof 70 are arranged in exactly the same way in all compounds. Nevertheless, in the solid state th

Psychometric properties of the French translation of the reduced KOOS and HOOS (KOOS-PS and HOOS-PS)

Objective: To evaluate the psychometric properties of the French KOOS physical function (KOOS-PS) and HOOS physical function (HOOS-PS), specifically its feasibility, reliability, construct validity, and responsiveness. Methods: Consecutive outpatients consulting for primary knee or hip osteoarthritis (OA) in a rheumatology department were included. During the initial assessment, patients were aske

Impact of different inhibitor reactivities with commercial factor VIII concentrates on thrombin generation

In order to describe the haemostatic role of a variation in inhibitor reactivity with different factor VIII (FVIII) concentrates, we have compared inhibitor titres against a panel of FVIII concentrates and correlated titre with the capacity to inhibit thrombin generation. Three plasma-derived concentrates were tested in vitro in mixing experiments with inhibitor plasmas from 11 patients with sever

Does it make sense in a coherent way? Determinants of sense of coherence in Swedish women 40 to 50 years of age

The aim of this study was to explore how socioeconomic and psychosocial life experiences in childhood and at adult age influence the level of sense of coherence (SOC) in women. The idea was to seek empirical support for establishing whether SOC is an individual construct being developed in early life and basically resistant toward adverse environmental factors or rather an entity influenced by adu

Suprathreshold intensity and annoyance reactions in experimental challenge to toluene and n-butyl acetate among subjects with long-term solvent exposure

OBJECTIVES: This study explores reactions to low-level chemical challenge, aiming at the development of test procedures for assessing individual sensitivity to smells and chemicals. METHODS: Subjects with symptoms and neuropsychological test results compatible with toxic encephalopathy type 2A (TE-2A) and 2B (TE-2B) and unexposed referents (N=12 in each group) were challenged in an exposure chambe

Auditory magnetic responses of healthy newborns

We recorded magnetic brain activity from healthy human newborns when they heard frequency changes in an otherwise repetitive sound stream. We were able to record the magnetic counterpart of the mismatch negativity (MMN) previously described only with electric recordings in infants. The results show that these recordings are possible, although still challenging due to the small head size and head m

The Linkoping-Lund surgical experience with the HeartMate left ventricular assist system

Four transplant candidates fulfilling the Food and Drug Administration criteria for a permanent left ventricular assist device received a pneumatic HeartMate system as a bridge to heart transplantation. All patients survived and were fully rehabilitated at the time of transplantation, which was carried out 2 to 6 months after the initial operation. There were no major complications associated with