Carbon Monoxide Triplet Rydberg Series in the f Complex Region

Using a multistep state-selective excitation scheme, fluorescence-dip spectra of carbon monoxide have been recorded in the energy region between 106 100 and 112 200 cm(-1). Prominent groups of bands were tentatively identified as transitions into the 6f em leader10f (v=0) and 9psigma em leader11psigma (v=0) triplet Rydberg series. For the f complex states, molecular constants have been calculated. The triplet f levels show an unusually large rotational constant and are located at higher energies than their singlet counterparts. Copyright 2001 Academic Press.     

Metastable surface phase for NaxC60

Na_xC₆₀ thin films with Na concentration 0 ? x ? 3 were investigated using angle-dependent photoelectron spectroscopy. For low doping we observed two distinct fulleride phases coexisting with regions of pristine C₆₀. One of these fulleride phase is predominantly formed close to the surface and disappears after annealing and further addition of Na. At higher doping a phase with stoichiometry of x = 3 is formed.     

Über das Ortho-Phenylenbiguanid

Ohne Zusammenfassung     

Zum Nachweis von Blut

Ohne Zusammenfassung     

The necessity for harmonisation of accreditation and recognition of testing laboratories, inspection bodies and certification bodies in the regulated and voluntary areas

 There have been two essential developments in current accreditation practices. One tends towards a flexible confirmation of competence of the testing laboratory for the adaptation of existing test methods and the development of new test methods. The other development attempts to assess and confirm the testing activity in terms of concrete processes for a specific application. These polarised tendencies, both in the preparatory work of the testing laboratory and in the assessment activity of the accreditation body, lead to increased costs. This paper examines the necessity for a harmonisation of these opposing sets of requirements by means of a categorised synopsis, citing actual examples. Efforts made to bring about such a harmonisation have, up to now, hardly progressed beyond first attempts and declarations of intention.     

Zur Kenntniss der Zimmtrinden

Ohne Zusammenfassung