Search PubMed⌕ Search

Biomedical subjects

B Fried

Publications and source records attributed to B Fried.

233 records · Page 13Linked to original sources
PubMedDate not supplied

Effects of restricted food intake on neutral lipid and free fatty acid levels in the digestive gland-gonad complex and faeces of Biomphalaria glabrata (Gastropoda).

High-performance thin-layer chromatography (HPTLC) was used to determine neutral lipids and free fatty acids in the digestive gland-gonad complex (DGG) and faeces of Biomphalaria glabrata. Three populations of B. glabrata were given varying food intakes for one week. They were either unrestricted (lettuce ad libitum plus a weekly feeding of Tetramin), restricted (15-17 mg of lettuce every two days), or starved (no food). Samples were prepared by extraction in chloroform:methanol (2:1), followed by a Folch wash (0.88% aqueous KCl). The major lipids detected in the DGG were triacylglycerols, free fatty acids and free sterols. Free fatty acids and free sterols were the major lipids detected in the snail faeces. Analysis by TLC-densitometry showed a statistically significant difference in the DGG levels of triacylglycerols and free sterols between the unrestricted and restricted groups, as well as between unrestricted and starved groups. Analysis of faecal samples revealed a significant difference in free fatty acids between unrestricted and starved groups on the seventh day.

Animals↗
PubMedDate not supplied

Cardiac activity in a simple reaction time task: predictive value of personality measures.

Twenty subjects, half having high extraversion and the other half having low extraversion scores on the Eysenck Personality Inventory, performed a simple reaction time task in which the warning stimulus was a light and the imperative stimulus was a tone. Beat-by-beat analysis showed significantly different response patterns between the two groups in time of onset, magnitude, and duration of the cardiac responses. The extraversion measures were found to relate to central-nervous-system-strength types and to indicate relative strength of central inhibitory processes, as reflected by cardiac activity.

Extraversion, Psychological↗