0000000000291423

AUTHOR

K. Lenz

showing 4 related works from this author

Analysis of T-2 toxin by HPLC and GC in samples of corn and oats

1984

HPLC is the only physico-chemical method for the analysis of trichothecenes for which no derivatization is necessary. Hence a combination of different methods can be performed. For exclusion of any faulty interpretation of data and in order to decrease the detection limit HPLC should be followed by GC.

Detection limitChromatographyToxinClinical BiochemistryTrichotheceneGeneral Medicinemedicine.disease_causeHigh-performance liquid chromatographyAnalytical Chemistrychemistry.chemical_compoundchemistrymedicineGeneral Materials ScienceGas chromatographyDerivatizationMycotoxinFresenius' Zeitschrift für analytische Chemie
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Limit on Lorentz andCPTviolation of the bound neutron using a free precessionHe3/Xe129comagnetometer

2010

We report on the search for Lorentz-violating sidereal variations of the frequency difference of colocated spin species while the Earth and hence the laboratory reference frame rotates with respect to a relic background field. The comagnetometer used is based on the detection of freely precessing nuclear spins from polarized 3 He and 129 Xe gas samples using SQUIDs as low-noise magnetic flux detectors. As result we can determine the limit for the equatorial component of the background field interacting with the spin of the bound neutron to be b n ⊥ < 3.7 · 10- 32 GeV (95% C.L.).

PhysicsNuclear and High Energy PhysicsSpinsField (physics)Condensed matter physicsLorentz transformationMagnetic fluxNuclear physicssymbols.namesakeSidereal timePrecessionsymbolsNeutronSpin (physics)Physical Review D
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Comparison of European ICU patients in 2012 (ICON) versus 2002 (SOAP)

2018

Purpose: To evaluate differences in the characteristics and outcomes of intensive care unit (ICU) patients over time. Methods: We reviewed all epidemiological data, including comorbidities, types and severity of organ failure, interventions, lengths of stay and outcome, for patients from the Sepsis Occurrence in Acutely ill Patients (SOAP) study, an observational study conducted in European intensive care units in 2002, and the Intensive Care Over Nations (ICON) audit, a survey of intensive care unit patients conducted in 2012. Results: We compared the 3147 patients from the SOAP study with the 4852 patients from the ICON audit admitted to intensive care units in the same countries as those…

MaleOriginalEpidemiology[SDV]Life Sciences [q-bio]HSJ UCIlnfectious Diseases and Global Health Radboud Institute for Molecular Life Sciences [Radboudumc 4]MULTICENTERclinical outcomemortality rateCritical Care and Intensive Care Medicineintensive care unitlaw.invention0302 clinical medicineSeverity of diseaselawEpidemiologymiddle agedMedicine and Health SciencesFAILURE030212 general & internal medicineHospital Mortalityintensive care units -- analysis -- epidemiology -- mortalityGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)CODEScomparative studyintensive careMedicine(all)multilevel analysiIncidenceadultSciences bio-médicales et agricolesIntensive care unit3. Good healthEuropesepsaIntensive Care UnitsfemaleCohortenote intenzivne terapije -- analiza -- epidemiologija -- umrljivostHumanAdultmedicine.medical_specialtyseverity of diseaseCritical CareSepsiIntensive Care UnitUNITED-STATES610 Medicine & healthINTENSIVE-CAREEuropeanArticleSepsisEpidemiology; Sepsis; Severity of disease03 medical and health sciencesAll institutes and research themes of the Radboud University Medical Centerlength of staymaleEpidemiology; Sepsis; Severity of disease; Adult; Europe; Hospital Mortality; Humans; Length of Stay; Male; Critical Care; Intensive Care Units; SepsisAnesthesiologyIntensive careSepsisSCOREmedicineudc:614.2Humanshumanoutcome assessmentSeptic shockbusiness.industrySEPTIC SHOCK030208 emergency & critical care medicineLength of Staymedicine.diseaseTRENDSmajor clinical studySEVERE SEPSIScomorbidity assessmentEmergency medicineEpidemiology; Sepsis; Severity of disease; Critical Care and Intensive Care MedicineObservational studyCLAIMSbusinessSepsis;Severity of disease;Epidemiologyresnost bolezni
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Probing Lorentz invariance and other fundamental symmetries in3He/129Xe clock-comparison experiments

2011

We discuss the design and performance of a very sensitive low-field magnetometer based on the detection of free spin precession of gaseous, nuclear polarized 3He or 129Xe samples with a SQUID as magnetic flux detector. Characteristic spin precession times T*2 of up to 60 h were measured in low magnetic fields (about 1μT) and in the regime of motional narrowing. With the detection of the free precession of co-located 3He/129Xe nuclear spins (clock comparison), the device can be used as ultra-sensitive probe for non-magnetic spin interactions, since the magnetic dipole interaction (Zeeman-term) drops out in the weighted frequency difference, i.e., Δω = ωHe− γHe/γXe·ωXe. We report on searches …

Larmor precessionPhysicsHistorySpin polarizationLorentz covarianceComputer Science ApplicationsEducationMagnetic fieldThomas precessionClassical mechanicsQuantum electrodynamicsPrecessionSpin (physics)Magnetic dipoleJournal of Physics: Conference Series
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