Biomedical subjects

D Genner

Publications and source records attributed to D Genner.

3 recordsLinked to original sources

PubMed1992

Description of a modular, low cost, eater meter for the study of feeding behavior and food preferences in fish.

The eater meter described in this paper is especially designed for fish studies. It consists of three parts: the detector, the feeder, and the interface between the detector and the feeder. The detector is a rod that closed a circuit (by contact or through a magnetic detector) when stuck by a fish, the feeder is electric and can be of any commercial model, and the interface is a simple electronic device, or a computer. Some preliminary results obtained with rainbow trout, Oncorhynchus mykiss, are also presented in order to illustrate the uses of this modular eater meter for fish.

Animals↗

PubMed1982

Microprocessor-based system for collection and storage of the equine vectorcardiogram.

To evaluate the clinical application of a semiorthogonal lead system for use in the horse, an inexpensive means of recording and storing the ECG was required which would allow the subsequent vectorcardiographic analysis to be computerized. In investigating the various options for the system the basic requirements for the digitization of analogue data were reviewed and previous studies examined. The system subsequently developed used an 8080 microprocessor and a multichannel 8-bit analogue to digital converter. This unit was signal-level compatible with the laboratory recorder used in the study and was capable of functioning as a remote terminal. Storage was achieved through the use of a dual-drive task storage system. Programs were written in machine language, both to control the data acquisition procedure and subsequent storage and to facilitate the transfer of data from the microprocessor to a central computing facility for analysis. Data were collected with 8-bit accuracy at a sampling rate of 2,702 samples/s/ channel for 3 channels of data with a system frequency response before digitization of 0.05 to 2,500 Hz. Preliminary analysis indicated that for accurate reproduction, the frequency response of the system before digitization should be a minimum of direct current, to 1,300 Hz, dictating a sampling rate of at least 2,000 samples/s.

Animals↗

PubMedDate not supplied

Prevalence and pathogenesis of impotence in one hundred uremic men.

In a study of dialysis patients 79% of men complained of sexual dysfunction and 61% erectile impotence following uremia and the onset of regular dialysis therapy. Plasma testosterone levels were significantly higher in patients treated by continuous ambulatory peritoneal dialysis (p = 0.001) but the incidence of sexual dysfunction was not different from patients treated by hemodialysis. Although follicle-stimulating hormone levels were higher (p = 0.001) and penile blood pressure index levels lower (p less than 0.05) in patients with impotence, sexual function was not improved by exogenous testosterone, and vasculogenic impotence was identified in only 6% of patients. These findings suggest that a major component of uremic impotence is unrelated to primary testicular failure or penile vascular insufficiency.

Adult↗