Similar pattern of fine structure in the basement lamella of the skin and the external sheath of the notochord inXenopus larvae

Zusammenfassung Auf Grund von elektronenmikroskopischen Beobachtungen wird nachgewiesen, dass die Basalmembran der Epidermis und die äussere Chordascheide im Schwanz vonXenopuslarven eine übereinstimmende Feinstruktur besitzen; sie ist gekennzeichnet durch orthogonal angeordnete Kollagenfibrillen.

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Supported by the Swiss National Science Foundation for the Promotion of Scientific Research.     

Application de l'analyse discriminante à l'étude des différences anthropométriques selon les groupes sanguins du système ABO

Summary Anthropological measurements on 193 Swiss recruits have been studied using discriminatory analysis. Out of the 9 characters measured on each individual, 3 were chosen to ascertain whether differences between the ABO blood groups exist. Discriminatory analysis gives a simultaneous evaluation of the differences of the 3 measurements. They are found not to be significant.     

Nachweis der Selbst-Erregung der circadianen Periodizität bei Carabiden (Coleoptera Ins.)

Summary Most of the active individuals ofCarabus cancellatus (Coleoptera) investigated were synchronized by zeitgeber-lengths of 8/8 10/10 or 16/16 h. On the other hand, a smaller number of beetles lost the periodicities of these Zeitgebers and showed a circadian activity rhythm. According to these experiments, the existence of a self-sustained circadian oscillation in carabid beetles is demonstrated. As we believe, a special numerical method of computing the length of activity periodicities was used for the first time.     

Untersuchungen zur Neurosekretion beiAcheta domesticus L

Summary PAF-positive material, which is found in the brain and stomatogastric system of adultAcheta domesticus, can in addition be demonstrated in the Nervus corporis allati II. In the suboesophageal ganglion and the ventral nerve cord 3 different types of neurosecretory cells are described.     

A low density of 0.8 g cm(-3) for the Trojan binary asteroid 617 Patroclus

The Trojan population consists of two swarms of asteroids following the same orbit as Jupiter and located at the L4 and L5 stable Lagrange points of the Jupiter-Sun system (leading and following Jupiter by 60 degrees ). The asteroid 617 Patroclus is the only known binary Trojan. The orbit of this double system was hitherto unknown. Here we report that the components, separated by 680 km, move around the system's centre of mass, describing a roughly circular orbit. Using this orbital information, combined with thermal measurements to estimate the size of the components, we derive a very low density of 0.8(- 0.1)+0.2 g cm(-3). The components of 617 Patroclus are therefore very porous or composed mostly of water ice, suggesting that they could have been formed in the outer part of the Solar System.     

Crystallographic studies on the activity of glycogen phosphorylase b

High resolution studies on the crystal structure of glycogen phosphorylase b have identified the catalytic site to which the substrate glucose-1-phosphate binds strongly with some local conformational changes. The site is situated 8 A (phosphate-to-phosphate distance) from pyridoxal phosphate, an essential cofactor of all glycogen phosphorylases. The catalytic site is 33 A from the site in the N-terminal portion of the molecule to which adenine nucleotides bind. In contrast to phosphorylase a (the active form of the enzyme which is phosphorylated at Ser 14), the positions of the first 19 residues of phosphorylase b are not well defined.     

Civic Meaningfulness ‘Revisited’: A Final Reply to Honohan and Dekker

This final reply responds to Honohan’s invitation to articulate the Arendtian tone of the key-note paper. It spells out the philosophical intuition that the political life of citizens, at least potentially, is capable of making visible what makes human life worthwhile and fully meaningful, and the philosophical curiosity to see whether traces of this deep political awareness can be retrieved in dialogues with volunteers. In response to Dekker’s critical doubts, this final reply clarifies the central stakes of Claes’s paper. The core argument was not to show that the biographical model of meaningfulness is the prevailing approach of meaning in/of volunteering, but to assess the potentials and limits of the model’s interpretive power. Moreover, the paper argues for an alternative, existential model of meaningfulness. This approach refers to deep experiences of meaning that emerge from the practice of volunteering and that shift into powerful political experiences of hope, and a lived sense of equality.