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  • Articles  (12)
  • Springer  (12)
  • 2015-2019  (3)
  • 2000-2004  (1)
  • 1995-1999  (8)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (12)
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  • Articles  (12)
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  • 1
    ISSN: 1436-6215
    Keywords: Frauenmilich ; Thiamin ; Riboflavin ; Vitamin A ; Vitamin E ; Human milk ; thiamine ; riboflavin ; vitamin A ; vitamin E
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary The contents of the vitamins B1 (27 ng/ml), B2 (57 ng/ml), A (1.3 µg/ml), and E (9.7 µg/ml) as well as β-carotene (0.2 µg/ml) in transitional human milk were determined for up to 35 women aged between 19 and 31 years. Additionally, the vitamin content in maternal and cord plasma as well as the erythrocytic transketolase- and glutathion-reductase activities of the water soluble vitamins were measured. Dietary recalls were evaluated for the nutritional intake of vitamins. Concerning the fat soluble vitamins, the breast fed newborns received the recommended amounts of the German Society of Nutrition (DGE) for this group. In contrast to this, the supply of the water soluble vitamins (B1: 13.5 µg/500 ml; B2: 28.5 µg/500 ml) attained only 5 to 10 % of the recommendations for newborns during the first two weeks after parturition with breast feeding. Vitamin content of maternal plasma (B1: 6.1±2.8 ng/ml) and erythrocytic enzyme activities (αETK: 0.86–1.62; αEGR: 1.08–1.75) indicated a low or sufficient intake, while the values in cord blood (B1: 19.8±6.5 ng/ml; αETK: 0.62–1.62; αEGR: 1.01–1.47) were in accordance with a satisfactory supply.
    Notes: Zusammenfassung Die Gehalte der transitorischen Frauenmilch an den Vitaminen B1 (27 ng/ml), B2 (57 ng/ml), A (1,3 µg/ml) und E (9,7 µg/ml) sowie β-Carotin (0,2 µg/ml) wurden bei bis zu 35 Frauen im Alter zwischen 19 und 31 Jahren untersucht. Zusätzlich wurden die Vitamingehalte im Plasma der Wöchnerinnen und in der Nabelschnur nach der Geburt sowie bei den wasserlöslichen Vitaminen die Aktivitäten der Transketolase und der Glutathion-Reduktase in den Erythrozyten ermittelt. Ernährungsprotokolle lieferten einen Überblick über die Vitaminzufuhr. Bei den fettlöslichen Vitaminen erhielten die Säuglinge beim Stillen die von der DGE empfohlene Menge, während die Empfehlungen zur Zufuhr wasserlöslicher Vitamine in den ersten beiden Stillwochen mit einer Aufnahme von 13,5 µg/500 ml (B1) und 28,5 µg/500 ml (B2) nur zu 5–10 % erreicht wurden. Plasmaspiegel (B1: 6,1±2,8 ng/ml) und erythrozytäre Enzymaktivitäten (αETK: 0,86–1,62; αEGR: 1,08–1,75) der Wöchnerinnen wiesen eine unzureichende bis adäquate Versorgung aus, während die Werte im Nabelschnurblut (B1: 19,8±6,5 ng/ml; αETK: 0,62–1,62; αEGR: 1,01–1,47) eine gute bis befriedigende Versorgung der Säuglinge belegten.
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  • 2
    ISSN: 1436-6215
    Keywords: Key words Intestinal absorption – lycopene – tomato matrices – tomato oleoresin capsules – antioxidant capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Notes: Summary Background: The bioavailability of carotenoids has been investigated in animal studies as well as in human studies, so far mostly for β-carotene. Only few results exist for lycopene. In recent studies, lycopene was significantly better available from processed tomatoes compared to raw tomatoes, when using daily intakes between 16.5 mg and 75 mg lycopene. Aim of the study In a comparative study the availability of a low oral lycopene dosage of 5 mg/d from different food matrices versus soft gel capsules containing tomato oleoresin was assessed. In addition to the plasma carotenoid content, the effect of lycopene ingestion on other plasma carotenoids, the lipid status parameters, and the antioxidant activitys was estimated. Methods Twenty-two female adults (20 – 27 y) were randomized in three groups and were advized to minimize their carotenoid intake for two weeks. After this initial period, two groups received a portion of tomatoes or tomato juice adjusted to a lycopene dose of 5 mg/d, the third group ingested the same dose comprized in soft gel capsules containing tomato oleoresin. During the test period of 6 weeks, the participants continued reducing the intake of carotenoids from food. Fasting blood samples were withdrawn prior to the study, before supplementation started, and then weekly while supplemented. Seven-day dietary records were prepared before the study started and after one week of supplementation. Carotenoids were analyzed by reversed phase HPLC with diode array detection. Dietary records were evaluated using the computer software EBIS 2.1. The plasma total cholesterol, HDL cholesterol, and triglycerides were determined enzymatically. In addition, the antioxidant activity of plasma was estimated by using the TEAC and the TRAP assays. Results The basal levels of lycopene in plasma were comparable for all groups (0.2 – 0.3 μmol/l) and decreased significantly during the two weeks of depletion to approximately 50 % of the basal values. Other plasma carotenoids such as β-carotene and β-cryptoxanthin decreased significantly, too, whereas lutein and zeaxanthin remained unchanged. After supplementation with tomato oleoresin capsules or tomato juice, the plasma lycopene increased significantly, while it remained unchanged during intake of tomatoes. Normal dietary habits were practized of all volunteers before and during the study except vitamin C whose intake was significantly lower during the study period, because the probands were recommended to reduce the intake of fruits and vegetables. Lycopene supplementation did not affect the lipid status parameters of the three groups. After ingestion of lycopene the antioxidant activity of the plasma was not altered. Mean TEAC values were estimated to 0.33 ± 0.05 mmol/l and TRAP values to 1.0 ± 0.1 mmol/l and showed no significant differences in all groups during the whole study period. Conclusions The bioavailability of lycopene varied significantly depending on the administered matrix. Lycopene from tomato oleoresin capsules and tomato juice (processed tomatoes) was better absorbed from the intestine than lycopene from raw tomatoes. The daily intake of 5 mg lycopene, an intake comparable to the usual daily carotenoid intake, did not affect cholesterol and triglycerides in plasma or its antioxidant capacity.
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  • 3
    ISSN: 0044-264X
    Keywords: Key words Flavonoids – flavonols – flavones – anthocyanins – bioavailability – antioxidative effects – prevention ; Schlüsselwörter Flavonoide – Flavonole – Flavone – Anthocyane – Bioverfügbarkeit – antioxidative Wirkungen – Prävention ; Abkürzungen DNA = Desoxyribonucleinsäure – LDL = Low-density lipoprotein – HPLC = Hochdruckflüssigchromatografie – IC = Inhibitory concentration – ROS = Reaktive Sauerstoffspezies – SD = Standardabweichung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Flavonoide sind nichtnutritive Pflanzenstoffe, deren Eigenschaften in den letzten Jahren hinsichtlich möglicher protektiver Einflüsse auf chronische Erkrankungen intensiv untersucht wurden. So konnte für Flavonole, Flavone und neuerdings auch Anthocyane in vitro eine teilweise erhebliche antioxidative Aktivität, die vor allem im Abfangen freier Sauerstoffradikale besteht, nachgewiesen werden. In europäischem Obst und Gemüse sind besonders Flavonole, aber auch Anthocyane weit verbreitet. Erhebliche Mengen beider Flavonoide können auch in schwarzem Tee und Rotwein enthalten sein. Diese Lebensmittel stellen mit unterschiedlichen Anteilen die wichtigsten Quellen für die Aufnahme von Flavonolen dar. Während die Absorption der Aglykone seit längerem nachgewiesen ist, konnten erst jüngste Untersuchungen die Absorption von Flavonolglykosiden aus dem Dünndarm belegen. Die durchschnittliche Aufnahme von Flavonolen in der bundesdeutschen Bevölkerung wurde anhand der Daten der Nationalen Verzehrsstudie ermittelt. Sie betrug etwa 11,5 mg pro Person und Tag und stammte überwiegend aus Obst und Gemüse, aber auch aus Tee und Rotwein. In epidemiologischen Studien wurde untersucht, ob die Höhe der Flavonolaufnahme mit dem Auftreten bestimmter Erkrankungen assoziiert ist. Es konnte gezeigt werden, daß ein inverses Verhältnis zwischen tödlich verlaufenden Herzinfarkten und dem Umfang der Flavonolaufnahme besteht. Eine inverse Beziehung von Flavonoidaufnahme und dem Risiko von Krebserkrankungen ließ sich bisher in einer von drei Studien nachweisen. Diese Übersicht stellt den aktuellen Wissensstand über Vorkommen, alimentäre Aufnahme, Bioverfügbarkeit und antioxidative Eigenschaften von Flavonolen, Flavonen und Anthocyanen sowie die mit der Flavonoidaufnahme verbundenen Krankheitsrisiken dar. Die möglichen gesundheitlichen Effekte, besonders von Flavonolen, werden vor diesem Hintergrund kritisch beleuchtet und der daraus resultierende Forschungsbedarf genannt.
    Notes: Summary Flavonoids are non-nutritive compounds of plants that have been intensively investigated during the past years due to their possible protective effects against chronic diseases. In vitro studies were able to demonstrate for flavonols, flavones, and most recently also for anthocyanins a considerable antioxidative activity, mainly based on scavenging of oxygen radicals. Flavonols and anthocyanins are commonly found in European fruits and vegetables. In addition, black tea and red wine may have a high content of these compounds. Those food items are the main sources of flavonol consumption each contributing to a different degree to the overall intake. The absorption of a aglycones has been established before. However, only recently could the absorption of flavonolglycosides be demonstrated. The mean intake of flavonols of the German population was calculated using data from the National German Food Consumption Survey. According to this analysis, the daily per capita intake was about 11.5 mg flavonols, mainly derived from fruits and vegetables, but also from black tea and red wine. Epidemiological studies have been directed to investigate the association between flavonol consumption and disease risk. An inverse association between flavonol intake and mortality from myocardial infarction was observed. According to one of three studies, the flavonoid intake can be inversely correlated with cancer risk. This review summarizes the current knowledge on the occurrence, intake, bioavailability, and antioxidative properties of flavonols, flavones, and anthocyanins as well as the associations between flavonol intake and disease risks. Possible health related effects especially of flavonols are critically reflected, and the necessity of further research is outlined.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Soil Science Society of America journal 63 (1999), S. 1055-1062 
    ISSN: 1435-0661
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Agroforestry systems 41 (1998), S. 85-112 
    ISSN: 1572-9680
    Keywords: abrasion ; leaf stripping ; lodging ; sandblasting ; thigmorphogenesis ; windbreaks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This review describes those mechanisms by which wind directly affects crop growth rates and hence yields. Wind-induced plant movement is capable of altering growth rates and leaf morphology, although this is unlikely to be a major cause of growth differences between sheltered and unsheltered crops grown outdoors. The wind's force can tear leaves or strip them from the plant. Dense plant canopies may suffer abrasion through intermittent or constant rubbing. Soil particles lifted into suspension by the wind have the potential to abrade and damage plant tissue. The wind's force can physically knock plants over, making crops difficult to harvest. Each of these mechanisms operates at a particular time of the growing season. Recovery, and hence final yield, depends on the growth stage and soil/plant moisture status when the damage occurred, the particular species and variety as well as the preceding and subsequent weather. The fact that damage effects are so dependent on the crop and the past weather makes modelling and any simple synthesis of direct wind effects difficult. The most common forms of damage likely in Australia's agricultural regions are from sandblasting and lodging. These damage events will be intermittent – their frequency depending on the local climate. Leaf tearing is likely in broad-leafed horticultural crops, and growth effects are also likely in any windy location. It is not possible to predict what the impact of this damage, and other direct effects, will be on final yields, Based on the results in the literature, protection from damage offered by windbreaks may have as large an effect on yields as incremental microclimate benefits.
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  • 6
    ISSN: 1573-5036
    Keywords: carbon ; geostatistics ; nitrification potential ; nitrogen ; pH ; root biomass ; soil respiration ; spatial Heterogeneity ; variability scale
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Geostatistical techniques were used to quantify the scale and degree of soil heterogeneity in 2 m2 plots around 9-year-old poplar trees and within a wheat field. Samples were taken during two years, on an unaligned grid, for analysis of soil respiration, C and N content, available P, gravimetric moisture, pH, nitrification potential, and root biomass. Kriged maps of soil respiration, moisture, and C content showed strong spatial structure associated with poplar trees but not with wheat rows. All soil properties showed higher autocorrelation in June than in April. Isopleth patchiness for all variates was less in June. This was associated with lower respiration rates due to lower litter decomposition. From the degree and scale of heterogeneity seen in this study, we conclude that the main causes of soil heterogeneity at this scale (2 m2) are likely to be found at micro scales controlled in part by plant root and plant residue patterns. These must be understood in the evaluation of ecosystem processes.
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  • 7
    Publication Date: 1997-09-01
    Print ISSN: 0044-264X
    Electronic ISSN: 1435-1293
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Published by Springer
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  • 8
    Publication Date: 1999-07-09
    Print ISSN: 1436-6207
    Electronic ISSN: 1436-6215
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Published by Springer
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  • 9
  • 10
    Publication Date: 2018-08-28
    Print ISSN: 0167-4366
    Electronic ISSN: 1572-9680
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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