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  • Electronic Resource  (9)
  • Ferredoxin  (3)
  • Growth  (3)
  • Koronare Herzkrankheit  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Resonance Raman spectroscopy of Azotobacter vinelandii ferredoxin I - Vibrational features of the [3Fe-3S] cluster
    Amsterdam : Elsevier
    FEBS Letters 163 (1983), S. 212-216 
    Details
    ISSN: 0014-5793
    Keywords: Ferredoxin ; Iron-sulfur protein ; Low temperature ; Resonance Raman spectroscopy ; [3Fe-3S] cluster ; [4Fe-4S] cluster
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(83)80821-7
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  • 2
    Electronic Resource
    Electronic Resource
    Resonance Raman spectroscopy of [2Fe-2X]^2^+ (X = S, Se) clusters in ferredoxins
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Protein Structure and Molecular 873 (1986), S. 108-118 
    Details
    ISSN: 0167-4838
    Keywords: Ferredoxin ; Resonance Raman ; Selenium substitution
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4838(86)90196-2
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  • 3
    Electronic Resource
    Electronic Resource
    High-yield chemical assembly of [2Fe-2X] (X = S, Se) clusters into spinach apoferredoxin: product characterization by resonance Raman spectroscopy
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Protein Structure and Molecular 871 (1986), S. 243-249 
    Details
    ISSN: 0167-4838
    Keywords: (Spinach) ; Active site reconstitution ; Ferredoxin ; Iron-sulfur center ; Resonance Raman spectroscopy ; Selenium substitution
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4838(86)90205-0
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  • 4
    Electronic Resource
    Electronic Resource
    A scanning electron microscopic study of the growth of hydroxyapatite crystals (1972)
    Springer
    Calcified tissue international 10 (1972), S. 91-102 
    Details
    ISSN: 1432-0827
    Keywords: Hydroxyapatite ; Calcification ; Phases ; Growth ; Microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé La croissance cristalline de l'hydroxyleapatite à 25° et à pH constant de 7.4 a été étudiée à l'aide du microscope électronique à balayage. La technique reproductible de croissance par ensemencement à partir de solutions stables sursaturées est utilisée efficacement pour produire des échantillons de minéral à divers stades distincts de croissance. Des changements de phase sont observés avec le progrès de la croissance; ils correspondent dans le temps avec les résultats cinétiques obtenus antérieurement. Un essai de rationalisation est tenté à la lumière des mécanismes proposés pour la formation d'hydroxyleapatite dans des conditionsin vivo.
    Abstract: Zusammenfassung Das Kristallwachstum von Hydroxyapatit bei 25° und einem konstanten pH von 7,4 wurde mit Hilfe eines Raster-Elektronenmikroskopes studiert. Die reproduzierbare Technik des Keimwachstums aus stabilen übersättigten Lösungen wurde mit Erfolg verwendet, um Mineralproben in verschiedenen bestimmten Stadien des Wachstums zu erhalten. Phasenveränderungen wurden beim fortschreitenden Wachstum beobachtet, und diese stimmten zeitlich gut überein mit kinetischen Resultaten, über welche früher berichtet wurde. Es wurde versucht, diese Beobachtungen zu erklären in Anbetracht von Mechanismen, welche für die Bildung von Hydroxyapatit unterin vivo-Bedingungen vorgeschlagen wurden.
    Notes: Abstract The crystal growth of hydroxyapatite at 25° and at a constant pH of 7.4 has been studied with the aid of a scanning electron microscope. The reproducible technique of seeded growth from stable supersaturated solutions was used effectively to produce samples of the mineral at various distinct stages of growth. Phase changes were observed as the growth proceeded and these corresponded favorably in time with kinetic results reported earlier. An attempt was made to rationalize the observations in light of mechanisms proposed for the formation of hydroxyapatite under conditions foundin vivo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02012539
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  • 5
    Electronic Resource
    Electronic Resource
    Myokardperfusion und -funktion nach Koronarinterventionen (1998)
    Springer
    Der Internist 39 (1998), S. 713-719 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Koronarreserve ; Myokardinfarkt ; Therapie ; PTCA ; Koronare Herzkrankheit ; Diagnostik ; Hibernation ; Stunned Myokardium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema Ein bei Belastung zunehmender Sauerstoffbedarf des Myokards kann im wesentlichen nur durch eine Steigerung der Koronardurchblutung gedeckt werden. Dies geschieht zu ca. 90% durch Dilatation der arteriolären Widerstandsgefäße und nur zu ca. 10% durch Dilatation der epikardialen Koronargefäße, die angiographisch sichtbar gemacht werden können. Die Differenz zwischen Ruhe- und maximal möglichem Blutfluß wird als Koronarreserve bezeichnet. Die Messung des koronaren Blutflusses, der Perfusion, des myokardialen Stoffwechsels sowie der Auswirkung auf die Myokardfunktion erfolgt durch verschiedenste Verfahren: Thallium-Szintigraphie, Positionen-Emissions-Tomographie, Magnetresonanztomographie, Clearance-Methoden, Doppler- und Kontrastechokardiographie, intrakoronare Doppleruntersuchungen u.s.w. Die mittels Koronarangiographie mögliche morphologische Beschreibung und Quantifizierung von Stenosedurchmessern ist hierzu nicht die Methode der Wahl. Die Ergebnisse dieser Untersuchungen bei verschiedenen koronarbedingten Erkrankungen und die Evaluierung von Therapiestrategien stehen im Mittelpunkt dieser Arbeit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050234
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  • 6
    Electronic Resource
    Electronic Resource
    Performance of two Picea abies (L.) Karst. stands at different stages of decline (1988)
    Springer
    Oecologia 75 (1988), S. 25-37 
    Details
    ISSN: 1432-1939
    Keywords: Forest decline ; Carbohydrates ; Picea abies ; Growth ; Leaf area index
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This is the first in a series of papers on the growth, photosynthetic rate, water and nutrient relations, root distribution and mycorrhizal frequency of two Norway spruce forests at different stages of decline. One of the stands was composed of green trees only while the other included trees ranging in appearance from full green crowns to thin crowns with yellow needles. In this paper we compare the growth and carbohydrate relations of the two stands and examine relationships among growth variables in ten plots. The declining stand produced 65 percent of the wood per ground area compared with the stand in which all trees were green because its foliage produced less wood at any level of leaf area index. The difference in foliage efficiency between the sites could not be explained by differeneces in climate, competition or stand structure. The declining stand appeared to have lower carbon gain as indicated by a smaller increase in reserve carbohydrates before bud break, and weaker sinks for carbohydrates as indicated by less use of the stored carbohydrates than the healthy stand. Thus, growth reduction was probably related to factors which affect both photosynthesis and, even more, the sinks for carbohydrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00378810
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  • 7
    Electronic Resource
    Electronic Resource
    Performance of two Picea abies (L.) Karst. stands at different stages of decline (1988)
    Springer
    Oecologia 77 (1988), S. 163-173 
    Details
    ISSN: 1432-1939
    Keywords: Forest decline ; Spruce (Picea abies) ; Nutrients ; Growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A declining, closed-canopy Picea abies (L.) Karst. stand produced as much crown biomass as a healthy stand, although some trees were chlorotic due to magnesium deficiency. The production of wood per unit of leaf area in both stands was related to the foliar magnesium concentration. Although leaf area index and climate were similar at both sites, stemwood production was 35% lower in the declining than in the healthy stand. Nutritional disharmony, rather than a deficiency in a single element, was identified as the mechanism for reduced tree vigor. The role of nutrient stress in forest decline was detected by partitioning the season into three periods reflecting different phenological stages: a canopy growth period in spring, a stem growth period in summer, and a recharge period during the non-growing season. Needle growth was associated with nitrogen supply. Most of the magnesium supply required to meet the demand for foliage growth was retranslocated from mature needles. Magnesium retranslocation was related to concentration of nitrogen and magnesium in those needles before bud break. Retranslocation from mature needles during the phase of canopy production resulted in chlorosis in initially green needles if the magnesium concentration before bud break was low. Nitrogen concentration in 0-year-old needles generally remained constant with increasing supply, indicating that foliage growth was restricted by the supply of nitrogen. In contrast, magnesium concentration generally increased with supply, indicating that magnesium supply for needle growth was sufficient. Much of the magnesium required for wood production was taken up from the soil because stored magnesium was largely used for canopy growth. Uptake at the declining site was probably limited because of restricted root expansion and lower soil magnesium compared to the healthy site. For this reason only wood growth was reduced at the declining site. Because the recharge of magnesium during the non-growing period is dependent on uptake from the soil, it was more limited at the declining that at the healthy stand. However, as nitrogen uptake from the atmosphere may account for an appreciable proportion of the total uptake, and as its supply in the soil at both sites was similar, an unbalanced recharge of nitrogen and magnesium may have occurred at the declining site. If mature needles are unable to recharge with magnesium in proportion to the uptake of nitrogen, chlorosis is likely to occur during the next canopy growth period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379182
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  • 8
    Electronic Resource
    Electronic Resource
    Kontrastmitteldarstellung des linken Ventrikels nach Injektion in den rechten Vorhof (1978)
    Springer
    Journal of molecular medicine 56 (1978), S. 351-354 
    Details
    ISSN: 1432-1440
    Keywords: Angiocardiography ; Left ventricle ; Premature ventricular contractions ; Coronary heart disease ; Videometry ; Angiokardiographie ; Linker Ventrikel ; Extrasystolen ; Koronare Herzkrankheit ; Videometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Kontrastmitteldarstellung des linken Ventrikels im Rahmen der Herzkatheteruntersuchung hat große Bedeutung in der Beurteilung der Dynamik des Myokards und der Herzklappen. Die Injektion von Kontrastmittel in den linken Ventrikel führt häufig zum Auftreten von Extrasystolen. Eine quantitative Analyse des Kontraktionsablaufs ist in diesen Fällen nicht möglich. Dieser Nachteil der Methode wird umgangen, wenn das Kontrastmittel in den rechten Vorhof injiziert wird. Die nach der Lungenpassage erzielte Darstellung des linken Ventrikels ist bei Anwendung der beschriebenen Technik frei von Extrasystolen und erfüllt die Kriterien der quantitativen Ventrikulographie. Die Erfahrungen der Arbeitsgruppe beruhen auf 57 Kontrastmitteldarstellungen des linken Ventrikels bei 32 Patienten mit verschiedenen Herzerkrankungen. Technik, Indikationen und spezielle Anwendungsmöglichkeiten (Videometrie, Druck/Volumen-Beziehung) werden dargestellt.
    Notes: Summary Left ventricular angiography as a diagnostic means is of considerable importance in the evaluation of myocardial and valvular dynamics. The injection of contrast medium into the left ventricle often causes premature ventricular contractions. In these cases quantitative analysis of the contraction pattern is impossible. This can be avoided by injection of the contrast medium into the right atrium. The technique described allows to obtain ventriculograms which meet the criteria for quantitative angiocardiography. 57 ventriculograms have been performed in 32 patients with various cardiac abnormalities. The study describes the technical procedure, the indications and limitations. Furthermore special applications are discussed (videometry, pressure-volume relationship).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01477395
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  • 9
    Electronic Resource
    Electronic Resource
    Aktuelle Therapie der koronaren Herzkrankheit Interventionelle Maßnahmen (1997)
    Springer
    Der Internist 38 (1997), S. 1179-1190 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Koronare Herzkrankheit ; Therapie ; Koronare Herzkrankheit ; PTCA ; Koronare Herzkrankheit ; interventionelle Therapie ; Stents ; PTCA ; Myokardinfarkt ; Therapie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema In der Behandlung des akuten Myokardinfarkts ist die PTCA fest etabliert. Bezüglich der koronaren Herzkrankheit konkurriert die PTCA allerdings besonders in Hinblick auf die Prognose des Leidens mit der medikamentösen Therapie und der aortokoronaren Bypassoperation. Welche Behandlungsstrategien und welche Indikationsstellungen im Einzelfall favorisiert werden können oder auch nicht, haben zahlreiche Studien in den letzten Jahren gesichert. Über das technische Vorgehen bei PTCA, Ergebnisse, Management und Restenosen nach PTCA sowie über den Vergleich der verschiedenen Therapieformen wird hier eingehend berichtet. Breiten Raum nimmt die Darstellung von Indikationen und Kontraindikationen und schließlich die interventionelle Behandlung des akuten Myokardinfarkts ein. Die bemerkenswerten Methoden der Stentimplantation zur Prävention von Reokklusionen einschließlich der technischen Weiterentwicklung von Stents sind faszinierend und für die erfolgreiche Senkung von Morbidität und Mortalität der koronaren Herzkrankheit und ihrer Komplikationen von hoher Bedeutung.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050130
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