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  • 1
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publication Date: 2024-04-05
    Description: There is general agreement within the fields of food, nutrition, and medical sciences that an individual’s diet and lifestyle can substantially predispose one to, or protect against osteoporosis, low bone mass, and numerous other age-related bone diseases. Dietary bioactives, found diversity in a variety of foods from fruits to vegetables, herbs and spices, essential oils and beverages, have the potential to influence bone health. The NIH Office of Dietary Supplements has defined dietary bioactives as “compounds that are constituents in foods and dietary supplements, other than those needed to meet basic human nutritional needs, which are responsible for changes in health status.” These compounds are generally thought to be safe in food at normal consumption levels (e.g., polyphenols in plant foods). Dietary bioactives are currently being assessed for their properties beyond antioxidant capacity, including anti-inflammatory actions. Some compounds or classes of compounds have been reported to enhance bone formation and inhibit bone resorption through their actions on cell signaling pathways that influence osteoblast and osteoclast differentiation. Emerging scientific evidence is available, including observational studies and small clinical interventions that suggest consumption of certain dietary bioactives may have beneficial effects on bone health. Animal models have the unique advantage of feeding controlled diets for extended periods of time to assess long-term changes in bone. While bone mineral density (BMD) is the gold standard for assessing fracture risk, other factors such as bone structure, including trabecular thickness and separation, influence bone strength. Bone turnover rate is also predictive of fracture. Future research is needed to determine the types and quantities of dietary bioactives that are most effective and at what dose, as well as the mechanisms involved in modulating cellular events, in order to set precedence for larger clinical trials.
    Keywords: QH301-705.5 ; bioactives ; dietary ; bone ; osteoporosis ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
    Language: English
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  • 2
    facet.materialart.
    Unknown
    MDPI - Multidisciplinary Digital Publishing Institute
    Publication Date: 2023-12-21
    Description: Diet and lifestyle choices can substantially predispose an individual to, or protect against, many age- and obesity-related chronic diseases. According to the NIH Office of Dietary Supplements, dietary bioactives arecompounds in foodsnot needed for basic human nutrition but responsible for changes in health status.1 These compounds are safe at normal food consumption levels (e.g., anthocyanins in berries) and their biological activities may come from a single compound (e.g., lutein in spinach) or a class of compounds (e.g., avenanthramides in oats) even if the exact identity and composition are unknown. Bioactive compounds of plants; can vary significantly in their ratios and relative concentrations depending onfactors such as cultivation, soil, altitude, and weather conditions. Substantial scientific evidence is available for some health promoting phytochemicals, such as dose-response relations, for performance and/or reduction in the risk of chronic disease. However, several limitations relating to absorption, distribution, metabolism and excretion of many dietary bioactives still exist and must be better understood This Special Issue compiles recent discoveries that advance our understanding of how dietary bioactive, particularly from fruits and vegetables, influence long-term health maintenance and disease prevention.
    Keywords: TX341-641 ; non-essential nutrient ; dietary bioactives ; disease prevention ; fruits ; vegetables ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFC Cultural studies::JFCV Food & society
    Language: English
    Format: application/octet-stream
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  • 3
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 10 (1967), S. 1015-1021 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 12 (1982), S. 0 
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This paper outlines two innovative projects carried out within the same organisation, but with markedly differing results. One has been satisfactorily completed while the other, although having run for much longer, is still experiencing technical problems. The two projects, British Rail's Advanced Passenger Train, and High Speed Train, are examined in relation to the concept of uncertainty. It is suggested that many of the points upon which the projects are differentiated can be attributed to the degree of uncertainty to which they were subject. It is concluded that one means of handling the uncertainty associated with development programmes is to adopt a flexible approach. It is noted, however, that flexibility may not be simply a question of personnel or organisational disposition, but can be influenced by the characteristics of particular projects.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 15 (1923), S. 73-74 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 15 (1923), S. 280-281 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 3132-3134 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An array of microlenses, with focal lengths that can be electrically varied, can control the coupling of light into a single mode fiber using an applied voltage. We have examined this technology with a view to the design of a confocal microlens/image-fiber endoscope. Maximum coupling to the fiber was found to occur over a voltage range of ∼1 V and over an axial range of 1 cm. Contrast ratios between minimum and maximum coupling of up to 30 dB were demonstrated. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 5518-5522 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report transport critical-current measurements of the YBa2Cu3Oy high-Tc superconductors using a contactless transformer technique. A critical-current density of 15.9±1.0 A/cm was observed at 77 K for samples fabricated by a standard preparation method for the high-Tc superconductors. The addition of a small amount of silver to samples of YBa2Cu3Oy has a dramatic degrading effect on the critical current. This is in sharp contrast to the Meissner-effect results, where silver addition has a minimal effect. No significant systematic frequency dependence of the critical-current determination was found between 10 and 5000 Hz. Visual observations of "blips'' in oscilloscope traces and an extrapolation of signals to zero blip height gave consistent results and established an uncertainty of ∼3% for critical-current determination. The range of dimensions of the ring-shaped samples yielded an uncertainty of ∼3% for the cross-sectional area. The overall uncertainty for an absolute measurement of the critical-current density is consequently ∼6%. The uncertainty in relative measurements of the critical-current density is very much less.
    Type of Medium: Electronic Resource
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