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  • Aging  (1)
  • Cardiac circulation  (1)
  • Edible insects  (1)
  • degradation mechanism  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 15 (1993), S. 31-34 
    ISSN: 1279-8517
    Keywords: Internal thoracic artery ; Myocardial revascularization ; Cardiac circulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Nous avons étudié l'a. thoracique interne en raison de l'intérêt qu'elle présente dans la revascularisation du myocarde chez des patients présentant une pathologie coronaire. Les aa. de 54 cadavres adultes des deux sexes, âgés de 20 à 84 ans, ont été étudiées après injection au Néoprène Latex afin de préciser l'origine de cette artère, ses relations avec le n. phrénique et l'origine de l'a. péricardiaco-phrénique. Les nn. phréniques droit et gauche croisent ventralement l'a. dans 54 % des cas. Ils la croisent dorsalement dans 14 % des cas ; le n. phrénique droit croise ventralement l'a., et le n. phrénique gauche la croise dorsalement dans 22 % des cas ; l'inverse survient dans 10 % des cas. L'origine de l'a. thoracique interne se fait plus souvent à partir de l'a. subclavière (80 %) qu'à partir d'un tronc commun avec d'autres aa. (20 %). L'a. péricardiaco-phrénique est une branche de l'a. thoracique interne dans 99 % des cas et la distance moyenne entre l'origine de ces deux aa. est de 3,9±1,3 cm.
    Notes: Summary The internal thoracic artery was studied because of its recent use in the revascularization of the myocardium in patients with coronary artery disease. The artery of 50 cadavers of adult individuals of either sex, whose age ranged from 20 to 84 years, was studied after neoprene latex injection. Its origin, relation to the phrenic nerve and origin of the pericardiacophrenic artery were investigated. The left and right phrenic nerves cross the artery anteriorly in 54% of the cases and posteriorly in 14%. The right nerve crosses the artery anteriorly and the left posteriorly in 22%, and the reverse occurs in 10%. The origin of the internal thoracic artery is much more frequent from the subclavian artery (80%) than from a common trunk with other arteries (20%). The pericardiacophrenic artery is a branch of the internal thoracic artery in 99% of the cases and the average distance between the origins of these two arteries is 3.9±1.3 cm.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Osteocalcin ; Menopause ; Aging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Osteocalcin (bone Gla protein) is a promising marker of bone turnover useful in the diagnosis and follow-up of high turnover osteoporosis. Conflicting results have been reported about its physiological variations according to sex, age, and menopause. Several, but not all, authors have found increased levels in males, with aging, and after menopause. We measured serum osteocalcin in 126 healthy subjects, 57 males and 69 females, aged between 45 and 88 years. Osteocalcin was higher (P〈0.01) in males (6.24±0.36) than in females (4.32±0.34). This sexual difference was significant, too, in subjects younger and older than 60 years. Osteocalcin increased with age, linearly in males (P〈0.05), and exponentially in females (P〈0.05). Although there was a difference in age (P〈0.05), no difference in osteocalcin levels between premenopausal women and women in their first two postmenopausal years was detected, while osteocalcin was significantly increased in women more than two years into menopause. We conclude that osteocalcin in healthy subjects is higher in males than in females and increases with age after 45 years in both sexes. Osteocalcin levels increase in women more than two years beyond menopause, but not only as an effect of aging.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1438-2199
    Keywords: Amino acids ; Amino acid determination ; Edible insects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The amino acid contents of edible insects from different provinces of Mexico and reference proteins were analysed by reversed-phase high-performance liquid chromatography and ion exchange chromatography. The insect amino acid contents were higher than the adult requirements indicated by the WHO/FAO pattern.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 683-695 
    ISSN: 1572-8943
    Keywords: degradation mechanism ; FTIR ; liquid crystal polyesters ; mass spectroscopy ; TG-MS ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The thermal stabilities of two thermotropic liquid crystal polyesters were analysed by means of thermogravimetric analysis (TG), as a function of the chemical structure of the aliphatic spacer between the aromatic-triad mesogenic units. TG was combined with mass spectrometry to confirm that the degradation mechanism previously observed in a Fourier transform infrared study of the degrading polymers follows a β-cis-elimination process.
    Type of Medium: Electronic Resource
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