The capability of optical resonators to extend the effective radiation-matter interaction length originates from a multipass effect, hence is intrinsically limited by the resonator's quality factor. Here, we show that this constraint can be overcome by combining the concepts of resonant interaction and coherent perfect absorption (CPA). We demonstrate and investigate super-resonant coherent abs...

The light transmission of freshly excised normal human lenses has been measured atfive visible wavelengths. The lens profile has also been recorded and used to calculate light lossper unit pathlength of lens. This loss, although made up of absorption and scatter thecontributions of which cannot be quantified, may be regarded as due to a hypothetical absorbingpigment. The loss is...

Detecting gases at low concentrations with FT-IR requires long pathlengths to increase absorption. The conventional approach employs a multi-pass White Cell where the light beam is reflected between two mirrors that are angled so that the beam emerges past one of the mirrors after a number of reflections, giving pathlengths up to tens of meters. In cavity-enhanced measurements, a highly collima...

The volatile compounds from fruits vary based on the spoilage stage. We used FTIR spectroscopy to analyze and to attempt to identify the spoilage process of strawberries. To enhance the sensitivity of the measuring system, we increased the optical pathlength by using multi-reflecting mirrors. The volatile compounds that were vaporized from strawberries in different spoilage stages were tested. ...

This work exploits a multi-syringe injection analysis (MSFIA) system coupled with a long liquid waveguide capillary cell for the spectrophotometric determination of zinc and copper in waters. A liquid waveguide capillary cell (1.0m pathlength, 550 μm i.d. and 250 μL internal volume) was used to enhance the sensitivity of the detection. The determination for both ions is based on a colorimetric ...

Perfusion of the pulmonary acinus has been shown to be generally homogeneous, but there is a significant component that is heterogeneous. To investigate the contribution of the alveolar septal capillary network to acinar perfusion heterogeneity, the passage of fluorescent dye boluses through the subpleural microcirculation of isolated dog lung lobes was videotaped using fluorescence microscopy....

D ieter Schubert and K arin Boss Max-Planck-Institut für Biophysik. Heinrich-HoffmannStraße 7, D-6000 Frankfurt a. M. 71 Z. Naturforsch. 40c, 908—911 (1985); received June 20/ August 5, 1985 Analytical Ultracentrifugation, UV Scanning System. Proteins, Triton X-100 Analytical ultracentrifugation studies on proteins in solu­ tions of the nonionic detergent Triton X-100, by means of a UV scanning...

A collaborative study to assign values to two enzyme reference materials (ERMs) was performed by 18 laboratories whose spectrophotometers were checked by us, just before the study. We measured the wavelength accuracy and repeatability, the accuracy and linearity of the absorbance curves, the cuvette pathlength, equilibration time, equilibrium temperature, and a few other variables. Five spectro...