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Biomedical subjects

R Strack

Publications and source records attributed to R Strack.

16 recordsLinked to original sources
PubMed2001

Using the Internet to pilot a questionnaire on childhood disability in Rett syndrome.

There is increasing use of the Internet for the transfer and sharing of medical information. Opportunities to pilot surveys online are now also available. An online HTML questionnaire allowed us to pilot a questionnaire about functional ability and the use of health services in Rett syndrome, a rare neurological disorder. Subscribers to a list server completed the online questionnaire and returned data by CGI script-formatted e-mail. Text boxes were provided for open-ended questions. Eighty-six questionnaires were returned from 224 subscribers with 76% returned within the first week. Almost all respondents were Caucasian, well educated and English speaking. The issue of selection bias and the need for mechanisms to validate the diagnosis are important considerations in any research facilitated through the Internet. However, we were able to contact an otherwise inaccessible group in a fast and cost-efficient manner and effectively pilot our survey without tapping into our own study population.

Adolescent↗
PubMed1989

Adaptive behaviour of laboratory rats feeding in hot conditions.

1. A group of six rats, living at thermoneutrality, but with access to food only under a high heat load, was compared with a similar group living and eating at thermoneutrality. 2. Animals eating in the heat reduced total food intake, meal duration, total feeding time, and rate of weight gain; they increased frequency of feeding and had higher water intakes. 3. Identifiable behavioral and nutritional responses explained some of the difference in adaptation between the groups through other factors may also have played a role.

Adaptation, Physiological↗
PubMed1988

Temperature and humidity of expired air of sheep.

The temperature and humidity of expired air from three adult Merino sheep were measured at air temperatures of 20, 30 and 40 degrees C before and after the animals were shorn. Expired air was apparently always saturated with water vapour. At the higher air temperatures the temperature of expired air was close to deep body temperature; at lower air temperatures, expired air had been significantly cooled, e.g. to 32.3 degrees C in shorn sheep at 20 degrees C air temperature. Expired air was cooler from shorn than from unshorn animals at 20 and 30 degrees C air temperature, possibly due to thermally induced vasomotor changes in the upper respiratory tract. Cooling of expired air would be expected to lead to recovery of some of the water evaporated during inspiration; at 20 degrees C air temperature, this fraction was estimated to be 25% in unshorn sheep and 36% in shorn sheep.

Animals↗