Enregistrement de l'activité dans les conditions naturelles sur les pistes deFormica polyctena
Résumé1oOn donne une technique simple d'enregistrement de l'activité des fourrageuses deF. polyctena sur leurs pistes.2oL'activité dépend non seulement de la distance par rapport au nid, mais encore de la piste considérée.3oL'activité n'est nullement comparable d'une piste à l'autre; l'activité nocturne apparaît très souvent dans les pistes populeuses et peut manquer dans les moins populeuses.4oLes pistes différent donc non seulement quant à leur capacité d'apprentissage et leur agressivité (Chauvin, 1962, 1964), mais aussi quant à leur activité; le comportement est également différent suivant l'âge de la piste, tout au moins dans les pistes qui relient les fourmilières filles à la fourmilière mère.5oL'aller et le retour prédominent à des périodes du jour très irrégulières et qui diffèrent pour chaque piste.6oLa température mesurée près du sol n'a qu'une faible corrélation avec l'activité des fourmis.Summary1oA technique is described which permits an easy recording of forager ants activity ofFormica polyctena on their trails.2oAnts activity is regulated by the distance from the nest, but this regulation is not the same in all the trails.3oAnts activity is not the same in all the trails; nocturnal activity appears very often on roads upon which the rate of flow is very high and may lack entirely on neighbouring, less crowded, roads.4oThe ants on, the differend roads are very heterogeneous regarding not only their activity but also their agressivity, their learning facilities (Chauvin, 1963–1964); their behaviour differ also according to road age; i. e. time clapsed from the road foundation, at least in the trails between a mother-colony and a daughter-colony.5oOutgoing and ongoing are very irregular and don't occur at the same time in different roads.6oTemperature close to the ground shows only a weak correlation with and activity.
Sur la mesure de l'activité des Abeilles au trou de vol d'une ruche a dix cadres
RésuméL'enregistrement de l'activité des ruches sur un appareil d'un type nouveau montre des fluctuations journalières très marquées. Elles ne sont pas en accord avec les variations thermiques ni avec les variations de l'activité solaire. Elles diffèrent beaucoup d'une ruche à l'autre, même quand les ruches sont placées côte à côte. L'enlèvement de tout le couvain, ou au contraire l'introduction de dix cadres de couvain, ne modifie pas visiblement ni rapidement l'activité. Il s'agit très probablement d'un accident statistique. Par contre, l'enregistrement sur huit jours qui efface ces accidents est en bon accord avec les variations thermiques.SummaryHive activity has been recorded with a new apparatus. There are very large variations during the day. These variations are not in correlations either with thermographic or solarigraphic records; and there are very large differences between hives that are close together. There differences are very probably due to teams of bees entering and leaving the hive together. The apparatus can stay in front of the hive for four months without damaging the bees.
Exercise-induced spastic coronary artery occlusion at the site of a moderate stenosis: neither Prinzmetal's angina nor cardiac syndrome X but "Prinzmetal X".
A 44-year-old man was referred to our hospital to undergo coronary angiography because of suspected coronary artery disease. For approximately 2 weeks, the patient had been experiencing typical symptoms of angina pectoris that occurred exclusively during physical exercise and predominantly in the morning hours when he bicycled to work. His general practitioner had performed a bicycle exercise test. In his written report, the practitioner noted that he suspected hemodynamically significant coronary artery disease because of reproduction of typical angina pectoris in addition to ischemic ECG changes.

On admission, the patient was in good general condition with no symptoms at rest. Coronary angiography revealed an ≈80% stenosis in the small right coronary artery and an ≈50% stenosis in the proximal segment of the left anterior descending artery (LAD), although systolic left ventricular function was normal (Figure 1). Fractional flow measurements (fractional flow reserve) were performed in the right coronary artery and the LAD and revealed a significantly impaired fractional flow reserve only in the right coronary artery (fractional flow reserve 70%) and not in the LAD (fractional flow reserve 85%). Thus, the right coronary artery stenosis was treated with a drug-eluting stent (Figure 1), and the patient was discharged on medical therapy.



Figure 1. 
Coronary angiograms of the left coronary artery (LCA) and right coronary artery (RCA) at first presentation. A stenosis of ≈50% was observed in the proximal segment of the LAD (left; black arrow), and an ≈80% stenosis was observed in the RCA (middle; black arrow). The stenosis of the RCA was stented successfully with a drug-eluting stent (right; black arrow). PCI indicates percutaneous coronary intervention.



Six weeks later, the patient was referred again to our department because of unchanged symptoms of exercise-induced …