PubMed Health⌕ Search

Biomedical subjects

P Merlin

Publications and source records attributed to P Merlin.

15 recordsLinked to original sources
PubMed1992

New C26 delta-lactones from the Dufour's gland of the urticating ant Tetramorium aculeatum.

(6R*)-[(2S*)-2-hydroxyheneicos-12-enyl]-5,6-dihydro-2H-pyran-2-one (1) degree is the major constituent of the secretion of freshly dissected Dufour's gland of the urticating ant Tetramorium aculeatum. In solution, compound 1 is slowly transformed into (1S*,5R*,7S*)-7-(nonadec-10-enyl)-2,6-dioxabicyclo[3.3.1] nonan-3-one (2) degrees on standing. The structures of compounds 1 and 2 have been established on the basis of their spectral and chemical properties. Compound 1 could be responsible for the urticating properties of the ant.

Animals↗
PubMed1991

Evaluation of health and productivity of small ruminants in Africa: the example of Senegal.

The authors describe a system of investigation introduced into Senegal in 1983; their purpose is to extend knowledge about the farming of small ruminants and the epidemiological relevance of such farming. The investigations are conducted in the traditional livestock sector by using a multidisciplinary approach. The precision and reliability of the information depend on the recording and processing of data on individual animals. The system of investigation has a modular structure organised around a central module for demographic surveys. The peripheral modules correspond to specific activities: clinical surveillance, recording changes in body state, laboratory tests and a study of animal husbandry conditions and practices. The authors distinguish four levels of analysis depending on the origin of variables under consideration: a single module (level 1), the demographic module plus the peripheral module (level 2), the demographic module plus two or more peripheral modules (level 3) and one or more modules derived from experimental modification of certain features of the husbandry system (level 4). The constraints and limitations of the procedure are discussed.

Agriculture↗
PubMed1989

Endocrine, hematological and immunological changes in surgical patients undergoing general anesthesia.

Some hematological endocrine, and immunological reactions in surgical patients under general anesthesia were studied. While serum cortisol, fT4, T4, rT3 levels increased, TBG, TSH, fT3 and T3 decreased. Cortisol increase and T3 and fT3 decrease were still significant three days after surgery. TSH and T3 decrease was significantly related to cortisol increase. CD4 (helper-inducer) cells dropped, rosettes, CD 5, CD 8, CD 16 (NK) and T HLA-DR (activated) number of cells did not change significantly. The decrease in CD 4 subset was significantly related to cortisol increase. Thus surgery was followed by a reduced thyroid function and decreased CD 4 subset. However this was observed also in the few patients in whom the serum cortisol level did not change. These reactions may represent immunosuppression occurring in the postoperative period.

Adult↗