oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 545 )

2018 ( 767 )

2017 ( 757 )

2016 ( 1046 )

Custom range...

Search Results: 1 - 10 of 423984 matches for " Robert M. Kok "
All listed articles are free for downloading (OA Articles)
Page 1 /423984
Display every page Item
No Effect of Folic Acid Supplementation on Global DNA Methylation in Men and Women with Moderately Elevated Homocysteine
Audrey Y. Jung, Yvo Smulders, Petra Verhoef, Frans J. Kok, Henk Blom, Robert M. Kok, Ellen Kampman, Jane Durga
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0024976
Abstract: A global loss of cytosine methylation in DNA has been implicated in a wide range of diseases. There is growing evidence that modifications in DNA methylation can be brought about by altering the intake of methyl donors such as folate. We examined whether long-term daily supplementation with 0.8 mg of folic acid would increase global DNA methylation compared with placebo in individuals with elevated plasma homocysteine. We also investigated if these effects were modified by MTHFR C677T genotype. Two hundred sixteen participants out of 818 subjects who had participated in a randomized double-blind placebo-controlled trial were selected, pre-stratified on MTHFR C677T genotype and matched on age and smoking status. They were allocated to receive either folic acid (0.8 mg/d; n = 105) or placebo treatment (n = 111) for three years. Peripheral blood leukocyte DNA methylation and serum and erythrocyte folate were assessed. Global DNA methylation was measured using liquid chromatography-tandem mass spectrometry and expressed as a percentage of 5-methylcytosines versus the total number of cytosine. There was no difference in global DNA methylation between those randomized to folic acid and those in the placebo group (difference = 0.008, 95%CI = ?0.05,0.07, P = 0.79). There was also no difference between treatment groups when we stratified for MTHFR C677T genotype (CC, n = 76; CT, n = 70; TT, n = 70), baseline erythrocyte folate status or baseline DNA methylation levels. In moderately hyperhomocysteinemic men and women, long-term folic acid supplementation does not increase global DNA methylation in peripheral blood leukocytes. ClinicalTrials.gov NCT00110604
An All Linear Optical Quantum Memory Based on Quantum Error Correction
Robert M. Gingrich,Pieter Kok,Hwang Lee,Farrokh Vatan,Jonathan P. Dowling
Physics , 2003, DOI: 10.1103/PhysRevLett.91.217901
Abstract: When photons are sent through a fiber as part of a quantum communication protocol, the error that is most difficult to correct is photon loss. Here, we propose and analyze a two-to-four qubit encoding scheme, which can recover the loss of one qubit in the transmission. This device acts as a repeater when it is placed in series to cover a distance larger than the attenuation length of the fiber, and it acts as an optical quantum memory when it is inserted in a fiber loop. We call this dual-purpose device a ``quantum transponder.''
Die konteks vir die keuse van geriefsvoedsel van bepaalde beroepsvroue *
M Kok, P Botha
Journal of Family Ecology and Consumer Sciences /Tydskrif vir Gesinsekologie en Verbruikerswetenskappe , 2004,
Abstract: The purpose of this research is to understand and describe the context in which career women choose, purchase and use convenience food (CF). A person is rarely isolated from or unaffected by factors in his/her context/environment. The context also helps to give meaning to the behaviour of people. The choice of an ecological framework as an organising tool for this study is therefore selfevident. The two most relevant environments or contexts in which a household functions are the socalled proximal or close, and distal or societal environments of the ecological framework. The close environment includes the social and physical subsystems. For this research, the social subsystem refers to the people for whom the food is intended, the type of meal and whether the meal occurs during the week or weekend. This may influence the type of food chosen. The physical subsystem refers in this case to the type of dwelling, e.g. whether it is a single freestanding unit or a townhouse (in which space is mostly limited). The societal environment refers inter alia to the economic and sociocultural subsystems. Understanding the interaction patterns among and within the various subsystems of these environments can contribute to an understanding of the complexity of choosing, buying and using CF. A qualitative research methodology and a grounded theory approach were used in the study. A theoretical sample was drawn to get to know more about the object of study. With this sampling technique, the researcher, on the one hand minimises differences, and on the other hand, maximises differences between participants. In the end, eight career women were chosen as participants, who met the criteria for inclusion in the study sample (minimising differences). The criteria were (a) a professional career and (b) a working week of at least 40 hours per week. Differences between the cases were maximised by including . participants of two age categories, namely eGeneration Xf and eBaby Boomersf; . single and married homemakers; . some participants without children and some with children of different ages. Basic individual interviewing and a projective technique were used to gather qualitative data. Cash slips, field notes and observations in the supermarket were used as additional sources of data and for triangulation purposes. Data analysis included open, axial and selective coding. Considering the closer environment, the most salient findings were the following: Social aspects are important when choosing CF. The preferences and likes of their spouses, children and guests seem to be considered when choosing CF. CF seems to be an acceptable choice for some of the married career women especially during the week when they are pressed for time, whereas single career women seem to use CF as a standard practice. For guests, food is often prepared from scratch. Only when guests arrive unexpectedly, CF would be considered. During weekends, a relaxed pattern regarding meal preparation seems
K. van der Horst, Handschriften en oude drukken van de Utrechtse Universiteitsbibliotheek
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1985,
Abstract:
J. Kuys, De Tielse kroniek. Een geschiedenis van de Lage Landen van de volksverhuizingen tot het midden van de vijftiende eeuw, met een vervolg over de jaren 1552-1566
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1985,
Abstract:
B. Ahlers, Die ltere Fassung der Vita Radbodi
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1980,
Abstract:
W. Lourdaux, M. Haverals, Bibliotheca Vallis Sancti Martini in Lovanio. Bijdrage tot de studie van het geestesleven in de Nederlanden (15de-18de eeuw), I, De bewaarde handschriften
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1981,
Abstract:
V. Lambert, Chronicles of Flanders 1200-1500. Chronicales written indepentenly from 'Flandria generosa'
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1995,
Abstract:
H. Hens, Mirakelen van Onze Lieve Vrouw te 's-Hertogenbosch 1381-1603
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1981,
Abstract:
A.M. van Lith-Droogleever Fortuijn, J.G.M. Sanders, G.A.M. van Syngel, Kroniek van Peter van Os. Geschiedenis van 's-Hertogenbosch en Brabant van Adam tot 1523
M. Carasso-Kok
BMGN : Low Countries Historical Review , 1999,
Abstract:
Page 1 /423984
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.