A New Miniaturized Gas Sensor Based on Zener Diode Network Covered by Metal Oxide.

The development of "portable, low cost and low consumption" gas microsensors is one of the strong needs for embedded portable devices in many fields such as public domain. In this paper, a new approach is presented on making, on the same chip, a network of head-to-tail facing PN junctions in order to miniaturize the sensor network and considerably reduce the required power for heating each cell independently. This paper is about recognizing a device that integrates both sensing and self-heating.

Expression of mdr1 gene in human breast primary tumors and metastases.

Expression of mdr1 gene has been evaluated in 34 tumor samples obtained from breast cancer patients who were classified according to their treatment, and clinical follow-up. No gene amplification was found. mdr1-RNA was never detected in 29 primary breast tumors including 5 samples from patients previously treated by 6 courses of 5-fluorouracil, epirubicin, cyclophosphamide (FEC).