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Search Results: 1 - 10 of 87285 matches for " Nancy W. Barbour "
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Crop and Soil Responses to Using Corn Stover as a Bioenergy Feedstock: Observations from the Northern US Corn Belt
Jane M. F. Johnson,Veronica Acosta-Martinez,Cynthia A. Cambardella,Nancy W. Barbour
Agriculture , 2013, DOI: 10.3390/agriculture3010072
Abstract: Corn ( Zea mays L.) stover is a potential bioenergy feedstock, but little is known about the impacts of reducing stover return on yield and soil quality in the Northern US Corn Belt. Our study objectives were to measure the impact of three stover return rates (Full (~7.8 Mg ha ?1 yr ?1), Moderate (~3.8 Mg ha ?1 yr ?1) or Low (~1.5 Mg ha yr ?1) Return) on corn and soybean ( Glycine max. L [Merr.]) yields and on soil dynamic properties on a chisel-tilled (Chisel) field, and well- (NT1995) or newly- (NT2005) established no-till managed fields. Stover return rate did not affect corn and soybean yields except under NT1995 where Low Return (2.88 Mg ha ?1) reduced yields compared with Full and Moderate Return (3.13 Mg ha ?1). In NT1995 at 0–5 cm depth, particulate organic matter in Full Return and Moderate Return (14.3 g kg ?1) exceeded Low Return (11.3 g kg ?1). In NT2005, acid phosphatase activity was reduced about 20% in Low Return compared to Full Return. Also the Low Return had an increase in erodible-sized dry aggregates at the soil surface compared to Full Return. Three or fewer cycles of stover treatments revealed little evidence for short-term impacts on crop yield, but detected subtle soil changes that indicate repeated harvests may have negative consequences if stover removed.
Pharmacogenomics: The Significance of Genetics in the Metabolism of Natural Medicines  [PDF]
Nancy W. Hanna
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.34046
Abstract: Natural products have been implemented in medicine through use as herbal medications, chemical compound extraction for prescription medication, or a natural source of food to fight various infections and diseases. Genetics has played a role in identifying various interactions between existing drugs and side effects. In addition, various food allergies have been identified with children in recent years, suggesting genetic associations between certain populations carrying specific genetic alleles. The recent availability of genomic data and our increased understanding of the effects of genetic variations permit a quantitative examination of the contribution of genetic variation to efficacy or toxicity of compounds derived from natural sources. The identification of target molecules relevant for diseases allows screening for natural products capable of inhibiting targets which can lead to the development of rational treatment of various diseases including neurobiological disorders, cancer, osteoporosis, and cardiovascular diseases. This allows for more opportunities to predict the response of individual patients. Identification of genetic variations that arose as a consequence of naturally occurring compounds will help identify gene alleles, or protein ligands that can affect the pharmacodynamic and pharmacokinetics of the natural products in question. In addition, diet modification and precautions to food products can be identified to help consumers limit or increase certain food intake. Understanding the molecular mechanisms underlying these interactions and their modification by genetic variation is expected to result in the development of new drugs that optimize individual health. We expect that strategies for individualized therapies will lead to improved results for patients.
Analysis of the Lee-Yang zeros in a dynamical mass generation model in three dimensions
I. Barbour,W. Franzki,N. Psycharis
Physics , 1998, DOI: 10.1016/S0920-5632(97)00881-5
Abstract: We investigate a strongly U(1) gauge theory with fermions and scalars on a three dimensional lattice and analyze whether the cintinuum limit might be a renormalizable theory with dynamical mass generation. Most attention is paid to the weak coupling region where a possible new dynamical mass generation mechanism might exist. There we investigate the mass of the composite fermion, the chiral condensate and the scaling of the Lee-Yang zeros.
Involving deprived communities in improving the quality of primary care services: does participatory action research work?
Peter G Cawston, Stewart W Mercer, Rosaline S Barbour
BMC Health Services Research , 2007, DOI: 10.1186/1472-6963-7-88
Abstract: The methods of participatory action research was used. The study was set in an area of high socio-economic deprivation served by a 'Local Health Care Co-operative' in a peripheral housing estate in Glasgow, Scotland. 72 local residents took part in 11 focus groups: eight of these were with community groups and three with other residents. 372 local residents completed questionnaires either by brief face-to-face interviews (114) or by self or carer completion (258).The study group produced recommendations on physical access to the health centre, time constraints in accessing services and problems encountered in individual relationships with health staff. They also highlighted the social gap between health service providers and the daily life of community residents. Action was taken to bring these recommendations to the attention of the Primary Care Organisation.Participatory action research was used to involve a deprived community in the UK in a 'bottom-up' approach aimed at improving quality of local primary care services. Although successful in creating a partnership between academic researchers and lay researchers and participation by local people in evaluating the primary care services available in the area, the impact of the study in terms of immediate action taken over specific issues has been modest. The possible reasons for this are discussed.Participation by communities in improving the quality of health services has become a feature of government policy in the United Kingdom. However, there has been relatively little evaluation of this activity, particularly when compared to the speed and extent of the recent changes that have been introduced in the NHS. Case studies have suggested that modest changes in quality may result from community participation [1].Participatory action research is an approach to research [2,3] which emphasises the political nature of how knowledge is created. Research participants are seen not as the passive objects of research knowle
Influence of Land Use Activities on Spatial and Temporal Variation of Nutrient Deposition in Mwanza Region: Implication to the Atmospheric Loading to the Lake Victoria  [PDF]
Said Ali Hamad Vuai, John D. Ibembe, Nancy W. Mungai
Atmospheric and Climate Sciences (ACS) , 2013, DOI: 10.4236/acs.2013.32024
Abstract:

Increase in population growth and the associated activities have increased the nutrient input to the Lake Victoria through atmosphere and river discharge. Atmospheric input of nutrient is believed to exceed that of river discharge due to relatively higher contribution of water mass to the Lake from atmosphere. However, precipitation characteristics with respect to nutrients have not been well studied to allow qualification and quantification of atmospheric contribution to the Lake Victoria. This study was conducted to investigate influence of land use activities on spatial and temporal variation of nutrient inputs from atmosphere and to estimate atmospheric loading to the Lake Victoria. The results revealed that there is significant spatial and temporal variation of nutrient deposition in the study area. High concentrations of nutrients were observed during short rains starting from September to December. This was attributed to dissolution of nutrients from soil particals and ash residues due to biomass burning accumulated in the atmosphere during dry season of June to August. Spatial variation of nutrients reflects land use activities. Urban and peri-urban areas showed very high concentration of nitrate nitrogen due to industrial and vehicle emission while rural area showed high concentration of phosphorous species and reduced forms of nitrogen species reflecting agricultural activities and animal keeping. Generally, nutrient deposition load was higher in rural area compared to urban with respective values of 15.5 and 13.9 kg·haˉ1·yˉ1 for total nitrogen and 6.1 and 2.8 kg·ha

Test Your Knowledge: Ten Questions about Melanoma
Virginia Barbour
PLOS Medicine , 2012, DOI: 10.1371/journal.pmed.0020394
Abstract:
The Secret, the Sovereign, and the Lie: Reading Derrida’s Last Seminar
Charles Barbour
Societies , 2013, DOI: 10.3390/soc3010117
Abstract: This paper takes up the question of secrecy and sovereignty in Derrida’s final seminar on The Beast and the Sovereign. Focusing primarily on Derrida’s readings of Lacan and Celan in Volume I, it argues that, for Derrida, we should distinguish between the lie (or what Lacan calls ‘trickery’ or ‘feigning feint’), and the secret (or what Celan calls ‘the secret of an encounter’), and understand the sense in which the former implies an intentional and sovereign human subject, while the latter represents a limit to such a thing, and, arguably, to the concept of sovereignty as such. This explains, or helps explain, why, in his discussions of sovereignty, Derrida spends so much time examining the animal, on the one hand, and poetry, on the other. For, on his account, these both configure secrecy, and specifically what I refer to as the absolute secret.
Test your knowledge: ten questions about melanoma.
Barbour Virginia
PLOS Biology , 2005,
Abstract:
Book Review – The Publish or Perish Book: Your Guide to Effective and Responsible Citation Analysis
Michael Barbour
International Review of Research in Open and Distance Learning , 2012,
Abstract:
Spiders Feeding on Small Cyprinodonts
T. Barbour
Psyche , 1921, DOI: 10.1155/1921/19421
Abstract:
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