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Digitale Medien

Properties of high-energy pions emitted from heavy-ion collisions at 1 GeV/nucleon (1995)

Müntz, C. ; Baltes, P. ; Oeschler, H. ; [weitere]

Springer

The European physical journal 352 (1995), S. 175-179

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ISSN: 1434-601X

Schlagwort(e): 25.75.+r

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Positively charged pions and protons from collisions of Ne+NaF and Au+Au at 1 GeV/nucleon incident energy were measured near midrapidity. The center-of-mass pion spectra deviate from a Maxwell-Boltzmann distribution. The slope of the high-energy part of the pion spectra varies significantly with the system mass and little with the size of the reaction zone. While the total pion yield rises linearly with the number of participant nucleons, the highenergy component increases more than linearly.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01298905

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2

Digitale Medien

Rheological measurements and light-scattering experiments of dilute solutions of high molecular polystyrene. Light-scattering of flowing polymer solutions (1991)

Cleschinsky, D. ; Stock, H. ; Springer, J.

Springer

Colloid & polymer science 269 (1991), S. 1250-1256

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ISSN: 1435-1536

Schlagwort(e): Light-scattering ; flowing polymer solution ; dilute polymer solution ; orientation and deformation of macromolecules ; polystyrene

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Maschinenbau

Notizen: Abstract We describe the behavior of dilute polymer solutions by means of light-scattering under shear flow. Solution properties of polystyrene in benzene over a wide range of molecular weight has been studied to determine the coefficientsa andK of the Mark-Houwink relationship and to estimate the rheological conditions with regard to light-scattering experiments of flowing polymer solutions. The investigations were carried out to measure the shear-rate dependence of macromolecules in solution, e.g., to observe an orientation and changing of the mean-square radius of gyration.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00652533

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3

Digitale Medien

Copepods associated with reef corals: a comparison between the Atlantic and the Pacific (1988)

Stock, Jan H.

Springer

Hydrobiologia 167-168 (1988), S. 545-547

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ISSN: 1573-5117

Schlagwort(e): Copepoda ; endoassociates ; corals ; biogeography ; tropical Atlantic ; Pacific

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Endoparasitic copepods are very numerous in Indo-West Pacific corals. In West Indian corals they were thought to be absent, but recent studies have shown that a varied endoparasitic copepod fauna exists as well. Striking is the taxonomic composition of the coral-inhabiting copepods: In the Indo-West Pacific Lichomolgidae and Xarifiidae are the dominant families, both are absent in the West Indies. On the other hand, Corallovexiidae and Asterocheridae dominate in the West Indies; the former family is absent and the latter is apparently rare and not very diversified in the Indo-West Pacific.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00026350

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4

Digitale Medien

First record of Crustacea Malacostraca from fresh waters in the Canary Islands (1990)

Stock, Jan H. ; Sánchez, Elias

Springer

Hydrobiologia 206 (1990), S. 53-59

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ISSN: 1573-5117

Schlagwort(e): Tenerife ; epigean fresh water ; Amphipoda ; Rhipidogammarus

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Beschreibung / Inhaltsverzeichnis: Resumen Crustacea Malacostraca era hasta ahora desconocida de las aguas dulces de las Islas Canarias. Una nueva especie de anfípodo, Rhipidogammarus rheophilus, ha sido recientemente descubierto de fuentes y manantiales de Tenerife.

Notizen: Abstract Crustacea Malacostraca were hitherto unknown from fresh waters of the Canary Islands. A new species of Amphipoda, Rhipidogammarus rheophilus, has recently been discovered in springs and spring brooks in Tenerife.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00018969

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5

Digitale Medien

Stygofauna of the Canary Islands, 6 A new Rhipidogammarus (Crustacea, Amphipoda) from Tenerife: first record of the genus outside the Mediterranean region and its biogeographic implications (1988)

Stock, Jan H.

Springer

Hydrobiologia 169 (1988), S. 279-292

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ISSN: 1573-5117

Schlagwort(e): Canary Islands ; groundwater Amphipoda ; Rhipidogammarus ; biogeography ; geological origin

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract The discovery of a new species ofRhipidogammarus, Rh. nivariae n. sp., in water supply shafts of Tenerife (Canary Islands), presents an interesting biogeographic problem. Up to now, members of the genus were known exclusively from stygohabitats in the peri-Mediterranean belt. Its sister-genus is found in very shallow waters of the Mediterranean, and on morphological grounds the genus seems to have got adapted only fairly recently to continental hypogean waters. The occurrence of a member ofRhipidogammarus on an oceanic island like Tenerife can be explained by one of the following two scenarios: (1) Tenerife is a fragment of the African plate, or (2) the island's volcanic outcrops arose from a very shallow submarine bank and drifted later into deeper waters.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00007551

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6

Digitale Medien

Analysis of Taylor vortex flow by means of laser light scattering (1992)

Stock, H. ; Zisenis, M. ; Cleschinsky, D. ; [weitere]

Springer

Rheologica acta 31 (1992), S. 274-282

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ISSN: 1435-1528

Schlagwort(e): Light-scattering ; flowing polymer solution ; dilute polystyrene solution ; Taylor-vortex ; solvent power

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Abstract Rheological measurements and light-scattering experiments were performed on dilute solutions of high molecular polystyrene. We are able to describe the orientation behavior of chain molecules under shear flow by means of light-scattering. Beyond that these investigations of light-scattering of flowing polymer solutions are an useful and suitable tool for detection and characterization of Taylor vortex formation. We can estimate the appearance of these hydrodynamic instabilities, which overlay the laminar main flow and we can observe a typical influence of the solvent power on it.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00366506

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