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Biomedical subjects

C E Scott

Publications and source records attributed to C E Scott.

23 records · Page 2Linked to original sources
PubMed1984

Feeding characteristics of Mongolian gerbils (Meriones unguiculatus).

Prolonged direct observation, and a series of timed dissections indicated that gerbils were not coprophagous when provided with an adequate stock diet ad libitum. However, coprophagy occurred after the feeding of a variety of purified amino acid rations. The diets apparently lack some needed nutriment . Gerbils ate food approximately eight times per day. Meal feeding, either for a 1-hour or a 2-hour daily interval, resulted in weight losses, which were often, but not always, reversed by adaptation to the feeding procedure. When given no other nutriment , weanling gerbils ate raw ground beef, but lost weight and died. Substandard growth was observed when sorghum, corn, oats, wheat, sunflower seed, or peanuts were fed. A mixed vegetable diet also gave substandard growth.

Animal Feed↗
PubMedDate not supplied

The DNA sequence and comparative analysis of human chromosome 20.

The finished sequence of human chromosome 20 comprises 59,187,298 base pairs (bp) and represents 99.4% of the euchromatic DNA. A single contig of 26 megabases (Mb) spans the entire short arm, and five contigs separated by gaps totalling 320 kb span the long arm of this metacentric chromosome. An additional 234,339 bp of sequence has been determined within the pericentromeric region of the long arm. We annotated 727 genes and 168 pseudogenes in the sequence. About 64% of these genes have a 5' and a 3' untranslated region and a complete open reading frame. Comparative analysis of the sequence of chromosome 20 to whole-genome shotgun-sequence data of two other vertebrates, the mouse Mus musculus and the puffer fish Tetraodon nigroviridis, provides an independent measure of the efficiency of gene annotation, and indicates that this analysis may account for more than 95% of all coding exons and almost all genes.

Animals↗
PubMedDate not supplied

Practice effects in industrial hearing screening.

Two samples of employees were drawn at random from the total population of approximately 12,000 employees in one large company. The base-line audiograms and two subsequent annual retests were studies on a sample of 118 employees to determine whether the mean threshold values improved with subsequent years of testing. In addition, the audiometric earphones were reversed so that the right ear was tested first on an automatic audiometer, followed by the left ear on a different sample of 400 employees in an effort to determine whether there is a significant difference between the first and second ear tested. Results indicate that subsequent retests do not show significant improvements. It is possible, however, the small improvements of 1 or 2 dB reported by other investigators over several years of testing may not be seen when mean values are used on populations of this size. Of more importance, however, was the fact that a consistent and significant difference was seen between the first and second ear tested, with the first ear tested showing the poorer threshold. When earphones were reversed, the left or previously poorer ear, showed better thresholds than the right in the low- and midfrequencies. The right ear continued to show better thresholds in the high frequencies, regardless of which ear was tested first.

Audiometry↗