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  • 2005-2009
  • 1970-1974  (8)
  • 1955-1959
  • 1970  (8)
Material
Years
  • 2005-2009
  • 1970-1974  (8)
  • 1955-1959
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 17 (1970), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The composition of sphingolipids and phospholipids of mouse brain during myelination was determined in normal animals and in mice with a genetically-determined disorder of myelin formation. Myelination was normally characterized by a two-fold increase in total phospholipids of brain, a four-fold increase in total sphingolipids, and a six-fold increase in cerebrosides. The Jimpy mutant, with defective formation of myelin in the central nervous system, demonstrated a marked deficiency of cerebrosides and a significantly lower content of total sphingolipids, without alteration of the composition of phospholipids. The increasing content of cerebrosides in the brains of the leucodystrophic mutant at the time in development when myelination is most active and the subsequent relative deficit suggest that the failure of myelin formation is not the result of a defect in biosynthesis of cerebrosides.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of food science & technology 5 (1970), S. 0 
    ISSN: 1365-2621
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A study has been made to determine if organoleptically and microbiologically acceptable beef could be produced by pre-rigor excision followed by rigor setting and short-term aging of bovine muscle. Six carcasses (three steers, two young bulls and one old bull) were subjected to each of three treatments: (1) the control side of each carcass was chilled at 9°C for 24 hr; (2) one sample (PRE-24) from each of five sites on the other side of each carcass was removed pre-rigor and stored at 15°C for 24 hr; (3) one sample (PRE-48) from each of five sites was stored at 15°C for 48 hr.Although the PRE-24 samples of the middle of the biceps femoris, anterior longissimus, and posterior longissimus were generally assessed to be similar to their controls in tenderness and other organoleptic properties a further 24 hr storage at 15°C resulted in a significant tenderization of the PRE-48 samples from these locations relative to their controls (P 〈 0.05). There was no treatment effect on the semimembranosus, whereas the semitendinosus toughened after being excised pre-rigor. Mean bacterial numbers were held within the range 102−105/cm2 muscle surface after 48 hr storage at 15°C in a sealed, gas-impermeable bag.The investigation shows that a procedure for the pre-rigor excision of bovine muscle can produce organoleptically acceptable beef of a satisfactory microbiological standard.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Concentrations of phosphocreatine (PC), adenosine triphosphate (ATP) and lactic acid were determined in longissimus muscle from 7 “stress-resistant” Chester White pigs and 8 “stress-susceptible” Poland China pigs at several intervals during the loss of extensibility postmortem. Calcium-binding ability of the sarcoplasmic reticulum and postmortem tension development of longissimus muscle also ware determined. Loss of extensibility was completed sooner in longissimus muscle from stress-susceptible pigs than from stress-resistant pigs. For the most part, longissimus muscle samples from stress-susceptible pigs had lower (P 〈.05) levels of PC and ATP and higher (P 〈 .05) levels of lactic acid at identical stages of change in extensibility than did samples from stress-resistant pigs. At identical stages of change in extensibility in “fast” and “slow-glycolyzing” muscles, there were no significant differences in the ability of the sarcoplasmic reticulum preparations to bind calcium or in the muscle's ability to develop isometric tension.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This study was conducted to compare the depletion of phosphocreatine (PC) and nucleotides (ATP and ADP) in strips of muscle which had been used for extensibility meesurements in the rigorometer with control strips of muscle which had been held unrestrained in the same environment. There were no significant differences in PC and ATP between the rigorometer and control strips. Rigorometer strips from “Stress-susceptible” pigs had less rapid and less extensive depletion of ADP than did control strips from the same animals. It appeared that extensibility remained in the tissue after the A TP had been depleted, but not after AOP reached a low level.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The relative time course of rigor mortis was compared in the vastus lateralis (red) and the longissimus (white) muscle from untreated and magnesium sulfate injected “Stress-resistant” Chester White pigs and “stress-susceptible” Poland China pigs. In untreated animals the white muscle had a shorter time course of rigor mortis than did the red muscle. This difference disappeared when the animals ware injected ante-mortem with magnesium sulfate although both muscles from injected animals had a slower development of rigor mortis than the same muscles in control animals. Either magnesium sulfate had more of an effect on white than on red muscle post-mortem, or the differences between the post-mortem rates of glycolysis of red and white muscles were significantly minimized when struggle and stimulation associated with death had been eliminated. Red muscles in magnesium sulfate injected pigs developed more tension post-mortem than did white muscles. The development of isometric tension reached its maximum as the muscle lost all of its extensibility. Muscle from “stress-susceptible” pigs had a shorter time course of rigor mortis than the corresponding muscle from “stress-resistant” pigs of the same treatment. This difference occurred even when the two groups started with the same level of phosphocreatine and lactic acid post-exsanguination, as is the case when treated with magnesium sulfate. Therefore, even though magnesium treatment can retard glycolysis sufficiently to prevent the development of the PSE condition (Sair et al., 1970), it does not necessarily standardize the postmortem changes in all skeletal muscles of all pigs.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 67 (1970), S. 282-292 
    ISSN: 1437-1596
    Keywords: Verkehrsunfälle ; Aufprallgeschwindigkeit ; Fußgängerunfälle ; Anstoßverletzungen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Aus 160 Obduktionen von Fußgängern, die durch PKW getötet worden waren, sind 50 nach folgenden Gesichtspunkten ausgewählt worden: Auffahrunfälle Erwachsener mit gesicherten Angaben in den Gerichtsakten über Fahrzeugbeschädigungen, Zusammenstoßstellen, Endlage der Fußgänger und Bremsspuren. Aus diesen Daten wurden Ausgangs- und Aufprallgeschwindigkeiten berechnet sowie die „Wurfweite” der Fußgänger gemessen. Die Ausgangsgeschwindigkeiten, nach der Berechnung zwischen 32 und 95 km/h, lagen meistens etwas höher als die angegebenen Geschwindigkeiten. Zwischen Ausgangs- und Aufprallgeschwindigkeiten waren die Differenzen größer. Ab 12 km/h Aufprallgeschwindigkeit kam es bereits zu tödlichen Verletzungen. Auffallend ist die zweigipfelige Verteilung der Häufigkeit sowohl bei der Einteilung nach den Aufprallgeschwindigkeiten als auch nach den Deformationsarbeiten (Aufprallgeschwindigkeit: 26% bei 51–60 km/h und 22% bei 21 bis 30 km/h; Deformationsarbeit: 34% bei 39–200 kpm und 30% bei 701–1000 kpm). Bei Aufprallgeschwindigkeiten über 50 km/h wurden doppelt so viel Knochenbrüche an der Wirbelsäule und am Becken als bei Aufprallgeschwindigkeiten unter 50 km/h festgestellt. Bei 44 Fußgängerunfällen lag ein Drittel innerhalb der Erwartungsgrenze der „Wurfweite” nach Fiala, je ein Drittel aber darüber bzw, darunter. Das Beschädigungsbild und die Anstoßverletzungen geben Hinweise zur Ermittlung der Aufprallgeschwindigkeit, vor allem wenn weitere Berechnungsgrundlagen fehlen.
    Notes: Summary Fifty cases were selected from 160 autopsies performed on pedestrians who were accidentally killed by private motorcars; the cases were selected according to the following criteria: The cases were confined to impact accidents involving adults in which reliable evidence could be gathered from the Court records in relation to damage to the car, the place of collision, the final position of the injured pedestrian and the extent of skidmarks. The initial and collision speeds of the cars were calculated from these facts and the distance of projection of the pedestrians were measured. The initial speeds, calculated between 32 and 95 km/h, were, in most cases, higher than the declared speeds. The differences between initial and collision speeds were larger. Fatal injuries could arise from a collision velocity of only 12 km/h. A striking feature of the analysis was the distribution of two peaks of frequency whether these were classified according to the collision speeds or according to the deformation of the vehicle (collision speed: 26% at the speed of 51 to 60 km/h and 22% at the speed of 21 to 30 km/h; deformation work: 34% at the deformation work of 39 to 200 kpm and 30% at the deformation work of 701 to 1,000 kpm). Twice as many fractures of the vertebral column and pelvis were sustained at collision speeds over 50 km/h as were sustained under 50 km/h. In one third of 44 pedestrian accidents, the distance of projection was within the expected range described by Fiala; in one third the distance was above and in one third below the expected range. If additional data for calculation were lacking, the patterns in injury arising from the impacts gave indications from which it was possible to estimate the collision speed.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Parasitology research 34 (1970), S. 15-15 
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Computing 6 (1970), S. 107-120 
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Summary Mathematical description of traffic flow has been tried repeatedly. Two types of theories are to be distinguished: Discrete traffic flow theories start from a system of differential equations for functionsx n (t) describing the routes of single cars. Continuous flow models require solution of a partial differential equation for the velocityv (x, t) and determination of trajectoriesx (t; c) of the velocity field thus obtained. In this paper these integrations for general initial and boundary conditions of a continuous flow model are performed. Treatment of a special case is added, yielding a flexible graphic method for solution of traffic flow problems. As an example of application, a frequently occurring traffic situation is analysed with this theory.
    Notes: Zusammenfassung Die Beschreibung des Kraftfahrzeugverkehrs in mathematischer Form ist mehrfach versucht worden. Es lassen sich zwei Typen von Ansätzen unterscheiden: Die diskreten Fahrzeugfolgetheorien gehen von einem Differentialgleichungssystem für die Bahnkurvenx n (t) der einzelnen Fahrzeuge aus. Die kontinuierlichen Strömungsmodelle verlangen die Lösung einer partiellen Differentialgleichung für die Strömungsgeschwindigkeitv (x, t) sowie die Ermittlung der Trajektorienx (t; c) im so entstandenen Geschwindigkeitsfeld, die als Bahnkurven der Fahrzeuge interpretiert werden. In der vorliegenden Arbeit werden für ein kontinuierliches Modell die genannten Integrationen bei allgeneinen Anfangs- und Randbedingungen geschlossen durchgeführt. Daran schließt sich die Behandlung eines Spezialfalles an, aus dem sich ein flexibles graphisches Verfahren zur Lösung von Kraftfahrzeugströmungsproblemen gewinnen läßt. Als Beispiel einer Anwendung wird ein im Verkehr häufig auftretender Effekt mit Hilfe dieser Theorie graphisch untersucht.
    Type of Medium: Electronic Resource
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