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  • 1
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We compared age-related changes in wrinkles in eight areas of facial skin (forehead, glabella, upper eyelid, corner of the eye, lower eyelid, nasolabial groove, cheek, and corner of the mouth) and sagging in the subzygomatic area of Caucasian females and of Japanese females. The subjects studied included 85 healthy Caucasian females (aged 20–69 years) living in Cincinnati in the U.S. and 70 Japanese females (aged 20–69 years) living in Tokyo. Photos of the face in frontal and in oblique 45 views were analyzed. Wrinkles in the face and sagging in the subzygomatic area were graded on Japanese photoscales, respectively, by the same experi-enced observer. The wrinkle score increased with age in all eight areas of the face examined in Caucasian females as well as in Japanese females. In the group aged 20–29 years, the wrinkle score in each area was significantly higher in Caucasian females than in Japanese females. The wrinkle scores in the forehead, glabella, upper eyelid, and corner of the eyes were similar at advanced ages between the two groups, while the wrinkle scores in lower areas of the face (lower eyelid, nasolabial groove, cheek, and corner of the mouth) were markedly higher in Caucasian females than in Japanese females in each age group, and reached an upper limit at advanced ages in Caucasian females. The sagging score also increased with age in Caucasian females as well as in Japanese females. The sagging score was significantly higher in Caucasian females than in Japanese females in the groups aged 40 years or more. These results suggest more marked wrinkle formation in all areas of the face in younger age groups of Caucasian females living in North America than in Japanese females living in Tokyo. In particular, Caucasian females showed marked age-related wrinkle formation in the lower areas of the face, probably due to sagging in the subzygomatic area, which suggests a higher susceptibility to sagging in the subzygomatic area of Caucasian females.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Understanding both the qualitative and quantitative transient responses to inlet flow and substrate step functions has been a relatively unsolved problem for continuous fermentation processes. This study of transient responses and simple descriptive models suggests that the saturation constant of the MONOD equation is a variable. Thatf variable depends on the rate constants of parallel biochemical pathways leading to cell growth, the concentration of cells themselves, and the concentration of all products in the culture. Mechanisms for describing the hysteresis behavior of the growth rate funcion are postulated in terms of the underlying molecular biology of the microbial system.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
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