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Search Results: 1 - 10 of 381668 matches for " C. L. Munster "
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Runoff and Nutrient Losses from Constructed Soils Amended with Compost
N. E. Hansen,D. M. Vietor,C. L. Munster,R. H. White,T. L. Provin
Applied and Environmental Soil Science , 2012, DOI: 10.1155/2012/542873
Abstract: Composted organic materials used to stabilize roadside embankments in Texas promote rapid revegetation of soils disturbed by construction activities. Yet, adding compost to soil may increase total and soluble plant nutrients available for loss in runoff water. Composted municipal biosolids and dairy manure products were applied to soils in Texas according to prescribed Texas Department of Transportation specifications for stabilizing roadside soils. The specifications included a method for incorporating compost into soils prior to seeding or applying a compost and woodchip mix over a disturbed soil and then seeding. Applying compost and woodchips over the soil surface limited sediment losses (14 to 32 fold decrease) compared to incorporating compost into the soil. Yet, the greatest total phosphorus and nitrogen losses in runoff water occurred from soils where the compost and woodchip mix was applied. The greatest losses of soluble phosphorus also occurred when the compost and woodchip mix was applied. In contrast, nitrate-nitrogen losses in runoff were similar when compost was incorporated in the soil or applied in the woodchip mix. Compost source affected the nutrient losses in runoff. While the composted municipal biosolids added greater nutrient loads to the soil, less nutrient loss in runoff occurred. 1. Introduction State Departments of Transportation (SDOT) are mandated to manage highway construction sites as potential nonpoint pollution sources. Soil particulate loads are often the greatest fraction of soil components in runoff from highway construction sites [1]. Soil erosion can occur when disturbed soils are unprotected from rainfall and flowing water. Silt fences, straw mulch, and material blankets are among several practices used to control erosion [2]. Additionally, composted biosolids and blends of biosolids with yard waste are among materials top-dressed or incorporated on constructed soil slopes to control erosion and enhance vegetation establishment [3–5]. Persyn et al. [5] reported 5 or 10?cm blankets of composted biosolids, yard waste, or industrial waste reduced runoff water and sediment compared to exposed subsoil or imported topsoil to high-way construction sites. In a complementary report, Glanville et al. [3] reported top-dressing composted materials decreased nutrient loss in runoff water during a simulated 30?min rain event compared to excavated soil alone. Specifications for the composition and application of composted materials to soil on construction sites vary among SDOTs [6]. Generally, application rates are depth- or
Numerical simulation of heavy fermions in an SU(2)_L x SU(2)_R symmetric Yukawa model
C. Frick,L. Lin,I. Montvay,G. Munster,M. Plagge,T. Trappenberg,H. Wittig
Physics , 1992, DOI: 10.1016/0550-3213(93)90350-X
Abstract: An exploratory numerical study of the influence of heavy fermion doublets on the mass of the Higgs boson is performed in the decoupling limit of a chiral $\rm SU(2)_L \otimes SU(2)_R$ symmetric Yukawa model with mirror fermions. The behaviour of fermion and boson masses is investigated at infinite bare quartic coupling on $4^3 \cdot 8$, $6^3 \cdot 12$ and $8^3 \cdot 16$ lattices. A first estimate of the upper bound on the renormalized quartic coupling as a function of the renormalized Yukawa-coupling is given.
Systematic comprehensive geriatric assessment in elderly patients on chronic dialysis: a cross-sectional comparative and feasibility study
Juliette L Parlevliet, Bianca M Buurman, Marja M Hodac Pannekeet, Els M Boeschoten, Lucia ten Brinke, Marije E Hamaker, Barbara C van Munster, Sophia E de Rooij
BMC Nephrology , 2012, DOI: 10.1186/1471-2369-13-30
Abstract: A cross-sectional, multicenter study, between June 1st and September 31st, 2009, in four Dutch outpatient dialysis units. Fifty patients aged 65?years or above who received dialysis because of end-stage renal disease (ESRD) were randomly included. We assessed the CGA during a systematic interview with patients and their caregivers. The cancer patients had had a similar CGA in an earlier study. We compared prevalences between groups.In the dialysis population (68.0% 75?years or above, 76.6% on haemodialysis) caregivers often observed behavioral changes, such as deviant eating habits (34.0%) and irritability (27.7%). In 84.4%, caregivers felt overburdened by the situation of their family member. Somatic and psychosocial conditions were frequently found (polypharmacy (94.6%), depression (24.5%)) and prevalence of most geriatric conditions was comparable to those in elderly cancer patients.Geriatric conditions were highly prevalent among elderly dialysis patients and prevalences were comparable in both populations. The CGA proved feasible for recognition of these conditions and of overburdened caregivers. This could prevent further functional decline and preserve quality of life.
Nf=2 Lattice QCD and Chiral Perturbation Theory
L. Scorzato,F. Farchioni,P. Hofmann,K. Jansen,I. Montvay,G. Munster,M. Papinutto,E. E. Scholz,A. Shindler,N. Ukita,C. Urbach,U. Wenger,I. Wetzorke
Physics , 2005, DOI: 10.1016/j.nuclphysbps.2006.01.035
Abstract: By employing a twisted mass term, we compare recent results from lattice calculations of Nf=2 dynamical Wilson fermions with Wilson Chiral Perturbation Theory (WChPT). The final goal is to determine some combinations of Gasser-Leutwyler Low Energy Constants (LECs). A wide set of data with different lattice spacings (a ~ 0.2-0.12 fm), different gauge actions (Wilson plaquette, DBW2) and different quark masses (down to the lowest pion mass allowed by lattice artifacts and including negative quark masses) provide a strong check of the applicability of WChPT in this regime and the scaling behaviours in the continuum limit.
Dynamical twisted mass fermions
F. Farchioni,P. Hofmann,K. Jansen,I. Montvay,G. Munster,M. Papinutto,E. E. Scholz,L. Scorzato,A. Shindler,N. Ukita,C. Urbach,U. Wenger,I. Wetzorke
Physics , 2005,
Abstract: We summarize four contributions about dynamical twisted mass fermions. The resulting report covers results for N_f=2 obtained from three different gauge actions, namely the standard Wilson plaquette gauge action, the DBW2 and the tree-level Symanzik improved gauge action. In addition, first results for N_f=2+1+1 flavours of twisted mass fermions are discussed.
Differential Changes in QTc Duration during In-Hospital Haloperidol Use
Marieke T. Blom, Abdennasser Bardai, Barbara C. van Munster, Mei-Ing Nieuwland, Hendrik de Jong, Daniel A. van Hoeijen, Anne M. Spanjaart, Anthonius de Boer, Sophia E. de Rooij, Hanno L. Tan
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0023728
Abstract: Aims To evaluate changes in QT duration during low-dose haloperidol use, and determine associations between clinical variables and potentially dangerous QT prolongation. Methods In a retrospective cohort study in a tertiary university teaching hospital in The Netherlands, all 1788 patients receiving haloperidol between 2005 and 2007 were studied; ninety-seven were suitable for final analysis. Rate-corrected QT duration (QTc) was measured before, during and after haloperidol use. Clinical variables before haloperidol use and at the time of each ECG recording were retrieved from hospital charts. Mixed model analysis was used to estimate changes in QT duration. Risk factors for potentially dangerous QT prolongation were estimated by logistic regression analysis. Results Patients with normal before-haloperidol QTc duration (male ≤430 ms, female ≤450 ms) had a significant increase in QTc duration of 23 ms during haloperidol use; twenty-three percent of patients rose to abnormal levels (male ≥450 ms, female ≥470 ms). In contrast, a significant decrease occurred in patients with borderline (male 430–450 ms, female 450–470 ms) or abnormal before-haloperidol QTc duration (15 ms and 46 ms, respectively); twenty-three percent of patients in the borderline group, and only 9% of patients in the abnormal group obtained abnormal levels. Potentially dangerous QTc prolongation was independently associated with surgery before haloperidol use (ORadj 34.9, p = 0.009) and before-haloperidol QTc duration (ORadj 0.94, p = 0.004). Conclusion QTc duration during haloperidol use changes differentially, increasing in patients with normal before-haloperidol QTc duration, but decreasing in patients with prolonged before-haloperidol QTc duration. Shorter before-haloperidol QTc duration and surgery before haloperidol use predict potentially dangerous QTc prolongation.
Risk factors for delirium in acutely admitted elderly patients: a prospective cohort study
Johanna C Korevaar, Barbara C van Munster, Sophia E de Rooij
BMC Geriatrics , 2005, DOI: 10.1186/1471-2318-5-6
Abstract: All consecutive patients of 65 years and over acutely admitted to the Department of Internal Medicine of the Academic Medical Centre, Amsterdam, a university hospital, were asked to participate. The presence of delirium was determined within 48 hrs after admission by an experienced geriatrician.In total, 126 patients were included, 29% had a prevalent delirium after acute admission. Compared to patients without delirium, patients with delirium were older, more often were cognitively and physically impaired, more often were admitted due to water and electrolyte disturbances, and were less often admitted due to malignancy or gastrointestinal bleeding. Independent risk factors for having a prevalent delirium after acute admission were premorbid cognitive impairment, functional impairment, an elevated urea nitrogen level, and the number of leucocytes.In this study, the most important independent risk factors for a prevalent delirium after acute admission were cognitive and physical impairment, and a high serum urea nitrogen concentration. These observations might contribute to an earlier identification and treatment of delirium in acutely admitted elderly patients.Delirium is a complex neuropsychiatric syndrome with an acute onset, characterized by disturbances of consciousness, attention, cognition, and perception. Delirium can be found in any medical condition and is the most common reason for acute cognitive dysfunction in hospitalised elderly patients [1-3]. This syndrome occurs in about 10 to 25% of all acute admissions to a general hospital. The frequency in older patients is higher, 20% to 40% [4]. Due to the aging of the population, the absolute number may increase in the future.Delirium has been associated with a poor outcome: prolonged hospitalisation, decreased cognitive and physical functioning, increased nursing home admission, and with a threefold higher morbidity and mortality risk [5,6]. Due to the severe consequences, recognition of delirium is importan
Sociedad, economía, inequidades y dengue
Kourí,Gustavo; Pelegrino,José L.; Munster,Blanca Maria; Guzmán,María G.;
Revista Cubana de Medicina Tropical , 2007,
Abstract: dengue and dengue hemorrhagic fever in the americas have been on the rise throughout the 1990s, with the highest number over one million cases reported in 2002. this paper analyzed the situation of dengue in the region and discussed the determining factors that account for the rise of the disease, making emphasis on socioeconomic factors, such as poverty, inequality, migrations and the lack of access to basic services, which are the most influential in perpetuating this disease in most countries. considering that a safe and accessible vaccine is now unavailable, basic principles of vector control combined with political willingness, inter-sectoral involvement, active community participation and the tightening of health legislation were also examined as the only viable solution at present.
Sociedad, economía, inequidades y dengue Society, economy, inequities and dengue
Gustavo Kourí,José L. Pelegrino,Blanca Maria Munster,María G. Guzmán
Revista Cubana de Medicina Tropical , 2007,
Abstract: Se analizó la situación en la región de las Américas acerca de la reemergencia del dengue y la emergencia de su forma severa, el dengue hemorrágico, que continúa siendo un problema con una tendencia al incremento a partir de la década de los 90, con el mayor número de casos en 2002 (más de 1 000 000 de enfermos). Se discutieron los factores que determinaron la emergencia de la enfermedad, haciendo énfasis en los factores socioeconómicos, entre los que se encuentran la pobreza y las iniquidades, las migraciones y el acceso a los servicios básicos de la población, como los de mayor preponderancia en el mantenimiento de la enfermedad en la mayoría de los países. Se analizaron también los principios básicos para el control del vector como única solución viable hoy día para controlar la enfermedad y la necesidad de la voluntad política, la intersectorialidad, la participación de toda la comunidad y el fortalecimiento de la legislación sanitaria en el control, al no disponer aún de una vacuna segura y accesible. Dengue and dengue hemorrhagic fever in the Americas have been on the rise throughout the 1990s, with the highest number over one million cases reported in 2002. This paper analyzed the situation of dengue in the region and discussed the determining factors that account for the rise of the disease, making emphasis on socioeconomic factors, such as poverty, inequality, migrations and the lack of access to basic services, which are the most influential in perpetuating this disease in most countries. Considering that a safe and accessible vaccine is now unavailable, basic principles of vector control combined with political willingness, inter-sectoral involvement, active community participation and the tightening of health legislation were also examined as the only viable solution at present.
Comparison of the Pathogenicity of Nipah Virus Isolates from Bangladesh and Malaysia in the Syrian Hamster
Blair L. DeBuysscher,Emmie de Wit,Vincent J. Munster,Dana Scott,Heinz Feldmann ,Joseph Prescott
PLOS Neglected Tropical Diseases , 2013, DOI: 10.1371/journal.pntd.0002024
Abstract: Nipah virus is a zoonotic pathogen that causes severe disease in humans. The mechanisms of pathogenesis are not well described. The first Nipah virus outbreak occurred in Malaysia, where human disease had a strong neurological component. Subsequent outbreaks have occurred in Bangladesh and India and transmission and disease processes in these outbreaks appear to be different from those of the Malaysian outbreak. Until this point, virtually all Nipah virus studies in vitro and in vivo, including vaccine and pathogenesis studies, have utilized a virus isolate from the original Malaysian outbreak (NiV-M). To investigate potential differences between NiV-M and a Nipah virus isolate from Bangladesh (NiV-B), we compared NiV-M and NiV-B infection in vitro and in vivo. In hamster kidney cells, NiV-M-infection resulted in extensive syncytia formation and cytopathic effects, whereas NiV-B-infection resulted in little to no morphological changes. In vivo, NiV-M-infected Syrian hamsters had accelerated virus replication, pathology and death when compared to NiV-B-infected animals. NiV-M infection also resulted in the activation of host immune response genes at an earlier time point. Pathogenicity was not only a result of direct effects of virus replication, but likely also had an immunopathogenic component. The differences observed between NiV-M and NiV-B pathogeneis in hamsters may relate to differences observed in human cases. Characterization of the hamster model for NiV-B infection allows for further research of the strain of Nipah virus responsible for the more recent outbreaks in humans. This model can be used to study NiV-B pathogenesis, transmission, and countermeasures that could be used to control outbreaks.
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