A new electronic radon/thoron monitor employing semiconductor detectors based on a passive diffusion chamber design has been recently developed at the Helmholtz Zentrum München (HMGU).
Small differences in dimensions between the 3 designs of passive sampler chamber had no discernable effect on accumulation rates, allowing comparison with previously published data.
Analysis of literature data published in the last few years leads to the conclusion that in the process of assessment of emission flux of organic compounds emitted from different types of equipment and finishing materials, new types of devices, among which small-scale passive emission chambers for the performance of in-situ research are designed and applied on a larger scale.
Mice were trained and tested in a two-chamber passive avoidance cage, in which one chamber was permanently darkened and separated from the lit chamber by a sliding door.
and the infralittoral/sublittoral Balanus crenatus Brug., are readily captured in small, chambered, passive traps deployed on rocky shores.
In a lying subject, raising the legs from the horizontal position passively transfers a significant volume of blood from the lower part of the body toward the cardiac chambers: Passive leg-raising (PLR) partially empties the venous reservoir and converts a part of the unstressed blood volume to stressed volume.
The operant chamber for passive avoidance is composed of two compartments (a lit one and a dark one) separated by a trap door (Anilab).
The isolated aortic rings, 3 to 4 mm in length with or without the endothelium, were fixed isometrically in organ chambers under passive tension (1.8 g) for 60 min.
Not surprisingly, FD chambers are functionally similar to regular dynamic chambers, but the passive regulation of gas flow means that internal concentration sensors can be switched off between measurements, thereby achieving very low power consumption and high reliability.
This piezoelectric pump, with two pump chambers and three passive valves, can achieve a precise supply of drugs by adjusting the voltage and frequency.
