2,449 research outputs found
Aanbevolen hoeveelheden gebasseerd op schattingen (interview met C.P.G.M. de Groot)
No full textEind 2009 werden de 'Vraag het de Expert'-bijeenkomsten over senioren gehouden. 'Besef dat de aanbevolen hoeveelheden voedingsmiddelen gebaseerd zijn op schattingen. Een kritische reflectie op de getallen die je hanteert is belangrijk', zei prof. dr. Lisette de Groot tegen de diëtisten in de zaal. De gebruikte voedingsnormen zijn niet zonder meer geschikt voor de beoordeling van voedselconsumptiegegevens van individuen
Gezond ouder worden? Doe meer met voeding! Voer voor 50-plussers (interview met C.P.G.M. de Groot)
No full textEnergy metabolism of overweight women before, during and after weight reduction, assessed by indirect calorimetry
No full textPrevious studies had suggested that periods of low energy intake evoke compensatory adaptations in energy metabolism, which retard weight loss, and promote weight regain when energy intake returns to normal. The aim of this thesis was to investigate whether a slimming (low-energy) diet based on alternating energy intake could counteract this decrease in energy requirement. The persistance of the reduction of energy metabolism was studied 1 month and approximately 1 year after weight reduction.The effects of three slimming diets were compared pairwise in three separate studies. To this end, a cross-over design was used (fig. 2). Two alternating diets (diet AB/100: one day solely bread, water. coffee and tea, the other day providing 100 % (normal diet) the daily energy need and diet A50/100: one day providing 50 % of the daily energy need, the other day 100 %) and one continuous diet (C50: providing 50 % of daily energy need every day) were prescribed or supplied. Ten women participated in each study. First each subject lived on a weight-maintenance diet (S100) for 8 days, then two periods of low energy intake, of 4 weeks each, followed immediately afterwards. Energy balances were determined during the final 8 days of each diet period. The 24 hour energy expenditure was measured in a respiration chamber for 2 or 3 successive days. The activity pattern in the respiration chamber was standardized. Dopplermeters and actometers were used to record physical activity.Follow-up measurements of energy balance were made on ten subjects 1 month after slimming and on eight subjects energy balance was determined approximately 1 year after slimming. Weight-maintenance diets, adjusted for weight loss, were supplied during the follow-up measurement periods.Over the first 4 weeks of slimming body weights decreased by averages of 5.8 kg (C50), 4.5 kg (AB/100) and 3.9 kg (A50/100). The average weight losses over 8 weeks were 6.9 to 9.0 kg. After 8 weeks at a low energy intake 24 hour energy expenditure had declined by 12 - 15 %. This decline was partly (50 %) accounted for by the reductions in body weight and partly (30 %) by reduced dietary induced thermogenesis. The remaining part (20 %) of the decline was probably due to the reduced cost and amount of physical activity which was indicated by Dopplermeter counts and actometer counts.Sleeping energy expenditure also decreased during slimming by 6 - 13 %, but this was no more than could be expected from weight loss.Weight reduction by alternating (low with normal) low energy intakes resulted in a reduction of energy expenditure which, when weight loss and energy intake were taken into account, was similar to the reduction by continuous low energy intake, thus alternating low energy intake did not prevent energy expenditure rates from declining.Subjects participating in the follow-up studies maintained their reduced body weights successfully. Their 24 hour energy expenditure rates in the follow-up studies were still below the rates measured before slimming. When body weight and energy intake were taken into account, both the 24 hour energy expenditure values and the sleeping energy expenditure values were the same before slimming, and 1 month or 1 year after slimming.The changes of energy metabolism were determined by alterations in body weight and energy intake and probably in physical activity as well. It remains to be investigated whether other adaptive mechanisms are evoked when energy intake is restricted more severely or for longer periods.</TT
Aanwijzingen voor effecten op functionele eindpunten : vitaminesuppletie voeding van ondervoede ouderen
No full textProtein or energy supplementation of the diet of malnourished older people leads to body weight gain and an improved nutritional status. There are no indications for an effect on functional endpoints. In contrast, according to Prof. Lisette de Groot (Wageningen University), vitamin supplementation reportedly leads to functional improvement
Raphaëlle de Groot : En exercice
No full text"This publication was produced by the Galerie de l’UQAM as part of an exhibition which took place from February 24 to April 1, 2006. The essay by Louise Déry presents the work site of Raphaëlle de Groot, who extended her original inquiry into the figure and roles of the artist by literally “exercising” in front of the exhibition’s visitors. The author also describes a vast project at the Cerutti textile factory in Biella, Italy, carried out by the artist during a residency at the Pistoletto Foundation in Biella. Yann Pocreau contributes an exercise in temporal writing modelled on the work of the artist, whose own texts, also presented here, are an essential complement to this volume." -- Publisher's websit
Dossier Gezondheid. 35 manieren om gezonder te leven (interview met Lisette de Groot)
No full textLekker lang gezond blijven, dat willen we allemaal wel. Psychologie Magazine zocht uit welke leefregels meteen effect hebben, en ook hoe je die makkelijk inbouwt in je leven. De allerbeste adviezen van 14 prominente Nederlandse gezondheidsexperts
Voeding versus veroudering
No full textIn her inaugural speech when accepting the office of professor by special appointment at Wageningen University, Lisette de Groot unfolds her intentions. Research on all levels (from descriptive research on a population level and individual interventions to studies on a cellular level) should bring a bit closer the target goal of curbing functional decline as a consequence of ageing processe
Hoe voeden we de oudere mens?
No full textWat zijn de effecten van voedingspatronen en nutriënten op de gezondheid, het functioneren, en de kwaliteit van leven van ouderen? Het onderzoeksteam van prof. Wija van Staveren en prof. Lisette de Groot in Wageningen heeft de afgelopen kwart eeuw observationele en interventiestudies uitgevoerd om die vragen te beantwoorden. Een symposium in Wageningen inventariseerde wat met dit en ander onderzoek is bereikt op het gebied van voeding voor ouderen
De Omgevingswet als groot ICT-project
No full textBinnen de planologie is veel onderzoek gedaan naar grote stedelijke projecten. De bij besluitvorming voorgestelde kosten en baten van zulke projecten zijn notoir onbetrouwbaar gebleken. Grote projecten kosten meestal meer dan geraamd, de realisatie duurt langer en de maatschappelijke baten vallen vaak tegen. Ook de Omgevingswet en het bijbehorende digitale stelsel kan worden beschouwd als een groot ICT-project. Niets wijst erop dat de Omgevingswet een van de schaarse positieve uitzonderingen zal vormen op de gangbare praktijk van grote projecten.Accepted Author ManuscriptOLD Geo-information and Land Developmen
Twenty Years of Brassinosteroids : Steroidal Plant Hormones Warrant Better Crops for the XXI Century
No full textThe discovery of brassinosteroids (BS) just over 20 years ago opened a new era in studies of bio-regulation in living organisms. Previously, the only known role of steroids as hormones was in animals and fungi; now a steroidal hormone in plants had been added. Progress in brassinosteroid research has been very rapid. Only 20 years passed between the discovery of brassinolide, the first member of the series, and the application of brassinosteroids in agriculture. Although the other plant hormones have been studied for a much longer period, there has not been similar development. Within the last couple of years two books on brassinosteroids (Khripach VA, Zhabinskii VN, de Groot A. 1999. Brassinosteroids—a new class of plant hormones. San Diego: Academic Press; Sakurai A, Yokota T, Clouse SD, eds. 1999. Brassinosteroids: steroidal plant hormones. Tokyo: Springer Verlag) have been published, but many new data have appeared since that time. Many of the more recent data is devoted to molecular biological aspects of BS and has helped to create a vision of their role in plants and their mechanisms of action. New discoveries of the physiological properties of BS allow us to consider them as highly promising, environmentally-friendly, natural substances suitable for wide application in plant protection and yield promotion in agriculture. This aspect of BS is the main subject of this Botanical Briefin
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