Commission 36. (Spectrophotometry.)

WP. 36 ENGLISH ONLY UNITED NATIONS STATISTICAL COMMISSION and ECONOMIC COMMISSION FOR EUROPE CONFERENCE OF EUROPEAN STATISTICIANS

During recent years the imputation strategy in Statistics Finland has been concretised so that we can speak about an integrated modelling approach (IMAI) to this kind of datacleaning (see Laaksonen 2000&2002a&2003, Chambers et al 2001, Piela and Laaksonen 2001). The strategy has been under consideration and consequently further developed in the two big European Union research projects, that is,...

Fluorescence Spectrophotometry

Fluorescence and phosphorescence are photon emission processes that occur during molecular relaxation from electronic excited states. These photonic processes involve transitions between electronic and vibrational states of polyatomic fluorescent molecules (fluorophores). The Jablonski diagram (Figure 1) offers a convenient representation of the excited state structure and the relevant transiti...

Low-temperature spectrophotometry

Photoreactions of the fourth rhodopsin-like pigment, phoborhodopsin (pR480), of Hulobacrerium halobium were studied by low-temperature spectrophotometry. Upon irradiation of pR480 at -80 as well as 170°C with 436 nm light, a new intermediate having a difference absorption maximum at about 520 nm was produced. We designate this intermediate ‘P520’. Prolonged irradiation caused the formation of a...

Basic UV/Visible Spectrophotometry

Paraffinoma confirmed by infrared spectrophotometry.