272 research outputs found
Extracting Boer-Mulders functions from p+D Drell-Yan processes
No full textWe extract the Boer- Mulders functions of valence and sea quarks in the proton from unpolarized p + D Drell- Yan data measured by the FNAL E866 Collaboration. Using these Boer- Mulders functions, we calculate the cos2 phi asymmetries in unpolarized pp Drell- Yan processes, both for the FNAL E866/ NuSea and the BNL Relativistic Heavy Ion Collider experiments. We also estimate the cos2 phi asymmetries in the unpolarized p (P) over bar Drell- Yan processes at GSI.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)37ARTICLE5null7
Genetic variants in lipid metabolism are independently associated with multiple features of the metabolic syndrome
No full textAbstract Background Our objective was to find single nucleotide polymorphisms (SNPs), within transcriptional pathways of glucose and lipid metabolism, which are related to multiple features of the metabolic syndrome (MetS). Methods 373 SNPs were measured in 3575 subjects of the Doetinchem cohort. Prevalence of MetS features, i.e. hyperglycemia, abdominal obesity, decreased HDL-cholesterol levels and hypertension, were measured twice in 6 years. Associations between the SNPs and the individual MetS features were analyzed by log-linear models. For SNPs related to multiple MetS features (P Results Two SNPs, CETP Ile405Val and APOE Cys112Arg, were associated with both the prevalence of low HDL-cholesterol level (Ile405Val P = Cys112Arg P = 0.001) and with the prevalence of abdominal obesity (Ile405Val P = 0.007; Cys112Arg P = 0.007). For both SNPs, the association with HDL-cholesterol was partly independent of the association with abdominal obesity and vice versa. Conclusion Two SNPs, mainly known for their role in lipid metabolism, were associated with two MetS features i.e., low HDL-cholesterol concentration, as well as, independent of this association, abdominal obesity. These SNPs may help to explain why low HDL-cholesterol levels and abdominal obesity frequently co-occur.</p
Flavor separation of the Boer-Mulders function from unpolarized pi(-)p and pi D- Drell-Yan processes
No full textWe show that measuring the cos2 phi angular dependence in unpolarized Drell-Yan processes with pi(-) beams colliding on proton and deuteron targets can determine the ratio of the Boer-Mulders functions for d and u quarks inside the proton h(1)(perpendicular to,d)/h(1)(perpendicular to,u), which is still lack of theoretical constraint. The comparison of the cos2 phi asymmetries measured in unpolarized pi(-)p and pi D- Drell-Yan processes, which are accessible at CERN by the COMPASS Collaboration, can help to discriminate whether h(1)(perpendicular to) effects or QCD vacuum effects are preferred by data. (c) 2006 Published by Elsevier B.V.Physics, MultidisciplinarySCI(E)18ARTICLE5494-49863
Healthy and Sustainable Diets: Finding co-benefits and trade-offs for the Netherlands
No full textThis thesis investigated the association between diet-related environmental impact and health. Data were from 40,000 Dutch participants enrolled in the EPIC-NL cohort with available dietary data at baseline (1993-1997) and in 2015. Environmental impact of diet was calculated using greenhouse gas (GHG) emissions and land use and health was measured according to the Dutch dietary guidelines (RGV). Additionally, mortality risk of chronic diseases was examined. Diet-related environmental impact was not associated with mortality risk. In 2015, participants ate relatively more fish and chicken but comparable quantities of red and processed meat. This resulted in a healthier diet, but similar environmental impact. Scenarios in which 35 grams of meat per day was replaced by vegetables, fruit or fish were environmentally friendlier (< 10% less GHG emission) and healthier (< 19% lower mortality risk). Better adherence to the RGV was healthier and more sustainable. Modelled policy scenarios with a 15% or 30% higher meat price or 10% lower price for fruit and vegetables showed several billion Euros net benefits over a 30-year period. Important dietary patterns for environment and health were characterized by the ratio of plant-based to animal-based foods (patterns 1) or the amount of dairy consumed (patterns 2). Compared to the average diet in EPIC-NL, participants with a ‘plant-based’ diet had a favorable score for environmental impact and health, while participants with the ‘dairy-based’ pattern were slightly healthier but had a higher environmental impact. Health aspects have been central in current dietary guidelines. In order to integrate environmental impact, several adjustments are proposed for profit on both aspects
J.N. et al. v. Oregon Department of Education et al., United States District Court for the District of Oregon, Case No. 6:19-cv-00096-AA
No full textDavid Bateman, PhD, Jenifer Cline, MA CCC SLP, Sonja de Boer, PhD, BCBA-D, Stacey Gahagan, Esq.Title from PDF title page (viewed on July 7, 2022).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
The analysis of lipophilic marine toxins : development of an alternative method
No full textLipophilic marine toxins are produced by certain algae species and can accumulate in filter feeding shellfish such as mussels, scallops and oysters. Consumption of contaminated shellfish can lead to severe intoxications such as diarrhea, abdominal cramps and vomiting. Methods described in European Union (EU) legislation to test for the presence of these toxins are based on a mouse or rat bioassay. These assays are unethical and have a poor sensitivity and selectivity. The aim of this thesis is to develop an alternative method based on liquid chromatography - tandem mass spectrometry (LC-MS/MS) for the quantitative analysis of lipophilic marine toxins. LC-MS/MS methods described in literature for the determination of lipophilic marine toxins used an acidic chromatographic system. Under acidic conditions peak shape and separation of a number of toxins preferably analyzed in electrospray ionization negative (ESI–) and positive (ESI+) were poor. A LC-MS/MS method with alkaline chromatographic conditions in which we were able to analyze 28 different toxins in a single analysis in separated retention time windows operating in either ESI– or ESI+ was developed. Furthermore, a clean up procedure based on solid phase extraction (SPE) was developed to reduce the amount of matrix effects (ion suppression and enhancement). A combination of SPE clean up and alkaline chromatographic conditions resulted in reduced matrix effects for all matrices tested (mussel, scallop and oyster). The developed SPE & LC-MS/MS method was in-house validated at regulatory limits based on EU Commission Decision 2002/657/EC. With respect to accuracy, repeatability, reproducibility, decision limit, specificity and ruggedness the method performed well. The method also performed excellently in view of possible new limits that are four- to five-fold lower than current limits for some toxins. Finally a screening method based on LC orbitrap MS was developed for 85 marine toxins of which most are not stated in EU legislation. The screening used in-house developed software which made it possible to reduce the complex data files and screen for a large number of toxins within seconds. This thesis will contribute to the replacement of the animal assays that are still prescribed in EU legislation for the determination of lipophilic marine toxins in shellfish. </p
cos2 phi asymmetries in unpolarized semi-inclusive DIS
No full textWe use the Boer-Mulders functions parameterized from unpolarized p+D Drell-Yan data by the FNAL E866/NuSea Collaboration combined with recently extracted Collins functions to calculate the cos2 phi asymmetries in unpolarized semi-inclusive deeply inelastic scattering (SIDIS) processes both for ZEUS at the Hadron Electron Ring Accelerator (HERA) and Jefferson Lab (JLab) experiments and to compare our results with their data. We also give predictions for the cos2 phi asymmetries of SIDIS in the kinematical regime of HERMES Collaboration, and the forthcoming JLab experiments. We predict that the cos2 phi asymmetries of semi-inclusive pi(-) production are somewhat larger than that of pi(+) production. We suggest the measurement of these two processes separately, which will provide more detailed information on the Boer-Mulders functions as well as on the Collins functions.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)13ARTICLE3null7
Systematic phenomenological study of the cos2 phi asymmetry in unpolarized semi-inclusive DIS
No full textWe study the cos2 phi azimuthal asymmetry in unpolarized semi-inclusive DIS, taking into account both the perturbative contribution (gluon emission and splitting) and the nonperturbative effects arising from intrinsic transvers motion and transverse spin of quarks. In particular we explore the possibility to extract from < cos2 phi > some information about the Boer-Mulders function h(1)(perpendicular to), which represents a transverse-polarization asymmetry of quarks inside an unpolarized hadron. Predictions are presented for the HERMES, COMPASS and JLab kinematics, where < cos2 phi > is dominated by the kinematical higher-twist contribution, and turns to be of order of a few percent. We show that under reasonable assumptions a larger asymmetry in pi(-) production, compared to pi(+) production, would represent a signature of the Boer-Mulders effect.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000259368500117&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)42ARTICLE4null7
Albert Grundlingh, The Dynamics of Treason: Boer Collaboration in the South African War of 1899-1902 Protea Book House, Pretoria, 2006: Shifty Burghers ñ Hensoppers and Joiners in the Orange Free State and the Transvaal
No full textAlmost thirty years ago, Albert Grundlingh, now Professor of History at the University of Stellenbosch, published his weighty MA dissertation in Afrikaans, entitled Die \u27Hensoppers\u27 en \u27Joiners\u27, an exhaustively researched, detailed and probing analysis of the experience of Boer collaboration with the British during the Anglo-Boer or South African War of 1899-1902. The dustjacket of that volume had a photograph of a very debonair-looking author. What a pity that the re-issue of the original Afrikaans text does not include a new picture for comparative historical interest. The appearance at last of this historiographically important text in good, plain English translation (by Bridget Theron) is to be lauded. Not only does it render an invaluable service to notoriously monolingual English-speaking scholars of the war. Beyond that, in more general terms, a classic work of originality and distinction should now find a more prominent place in any list of essential reading on the complex and contested terrain of white politics in pre-Union South Africa
On the cos2ϕ asymmetry in unpolarized leptoproduction
No full textAbstractWe investigate the origin of the cos2ϕ azimuthal asymmetry in unpolarized semi-inclusive DIS. The contributions to this asymmetry arising from the intrinsic transverse motion of quarks are explicitly evaluated, and predictions for the HERMES and COMPASS kinematic regimes are presented. We show that the effect of the leading-twist Boer–Mulders function h1⊥(x,kT2), which describes a correlation between the transverse momentum and the transverse spin of quarks, is quite significant and may also account for a part of the cos2ϕ asymmetry measured by ZEUS in the perturbative domain
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