In order to determine the mechanical properties of the vitreous which are characteristic for the extraction of foreign bodies, an oscillatory method was devised. The mechanical properties are described by a spring constant – relevant for the rubber elastic behaviour – and a friction constant characterizing the dissipative interaction inside the vitreous. The appropriateness of the data is demonstrated by the capability to predict the distance-time behaviour in strong, pulsed magnetic fields of ferromagnetic foreign bodies implanted into the vitreous of pig eyes.
No abstract
The article contains sections titled: 1. Introduction 2. Production 2.1. Principles 2.2. Blowing Agents 2.3. Additives 3. Properties 4. Specific Foamed Plastics 4.1. Polyolefin (PO) Foams 4.1.1. Low‐Density Polyolefin Foams (25 ‐ 250 kg/m 3 ) 4.1.2. High‐Density Polyolefin Foams (250 ‐ 700 kg/m 3 ) 4.2. Polystyrene (PS) Foams 4.2.1. Expandable Polystyrene (EPS) Foams 4.2.2. Extruded Polystyrene (XPS) Foams 4.2.3. Structural Polystyrene Foams 4.3. Poly(Vinyl Chloride) (PVC) Foams 4.3.1. Rigid Poly(Vinyl Chloride) Foams 4.3.2. Flexible Poly(Vinyl Chloride) Foams 4.4. Foams from Phenol‐Formaldehyde (PF) Resins 4.5. Foams from Urea‐Formaldehyde (UF) Resins 4.6. Foams from Melamine‐Formaldehyde (MF) Resins 4.7. Silicone (SI) Foams 4.8. Epoxy (EP) Foams 4.9. Polyimide (PI) Foams 4.10. Polymethacrylimide (PMI) Foams 4.11. Poly(Methyl Methacrylate) (PMMA) Foams 4.12. Polyamide (PA) Foams 4.13. Poly(Phenylene Oxide) (PPE) Foams 4.14. Polysulfone (PSU) Foams 4.15. Polycarbonate (PC) Foams 5. Testing 5.1. Mechanical Properties 5.1.1. Rigid Foams 5.1.2. Flexible Foams 5.2. Thermal Properties 5.3. Miscellaneous Properties 6. Economic Aspects 7. Toxicology and Environmental Aspects
Zusammenfassung: Nach tryptischer Solubilisierung isoliertes Cytochrom 65 (Kurz-fe) und Cytochrom 65 in der Detergenz-Form (Lang-fo) aus den Lebermikrosomen von Ratte, Schwein und Kaninchen wird in artgleichen und artfremden Kombinationen als Substrat für eine Cytochrom-^s-freie Präpara-tion der Ascorbat:FerricytocrironW> 5 -Oxidoreduktase dieser drei Tierarten eingesetzt. Unabhängig von Form und Tierart des eingesetzten Cytochroms erhält man für siebzehn von achtzehn möglichen Kombinationen der OxidoreduktasePräparation mit Cytochrom 65 im Bereich von l bis 5 liegende scheinbare Ä", n -Werte für das Haemoprotein. Bei Verwendung von Cytochrom 65 in der Detergenz-Form werden im Vergleich zur entsprechenden tryptischen Form des Cytochroms sowohl bei artgleicher als auch bei artfremder Kombination mit der Ascorbat: Ferricytochromas-Oxidoreduktase stark erhöhte Maximalgeschwindigkeiten erzielt, die bei entsprechender Haemoproteinkonzentration mit den mit der Oxidoreduktase in Originalmikrosomen erreichten Werten gut vergleichbar sind.Different forms of cytochrome 65 as substrates for L-ascorbate :ferricytochrome b^-oxidoreductase (EC 1.10.2.1) from mammalian liver microsomes Summary: Cytochrome 65 was isolated from the liver microsomes of rat, pig and rabbit by tryptic solubilization (short £5) and with the aid of detergents (long 65). Each form of cytochrome £5 was used in turn as the substrate for cytochrome preparations of ascorbaterferricytochrome £>5-oxidoreductase from each of the above three species. Independent of the form and species origin of the cytochrome, seventeen out of eighteen possible
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