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Search Results: 1 - 10 of 463509 matches for " Nancy A. Mahony "
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Vesper Sparrows and Western Meadowlarks Show a Mixed Response to Cattle Grazing in the Intermountain Region of British Columbia
Megan L. Harrison,Nancy A. Mahony,Pat Robinson,Alicia Newbury
Avian Conservation and Ecology , 2010,
Abstract: Livestock grazing in the shortgrass steppe of the Intermountain region of British Columbia is predicted to have significant effects on grassland habitats and their associated ground-nesting bird communities. We tested whether grazed and ungrazed sites could be discriminated on the basis of their vegetation communities, whether the abundance of two ground-nesting bird species, Vesper Sparrow (Pooecetes gramineus) and Western Meadowlark (Sturnella neglecta), differed between grazed and ungrazed sites, and whether vegetation variables found to differ between grazed and ungrazed plots could be used to predict the abundance of the two bird species at a fine scale. Grazed sites were easily distinguishable from a site that had been ungrazed for >30 years based on the structure and composition of their vegetation communities. However, more detailed grazing categories could not be distinguished on the basis of vegetation characteristics. Despite the existence of grazing effects on vegetation structure and composition, we found no consistent differences in abundance of Vesper Sparrows and Western Meadowlarks between the grazed and ungrazed sites. However, there was weak evidence that the abundance of both species was higher at fine-scale plots (100 m radius point count station) with less bare ground and taller vegetation. Bare ground cover was lower on grazed plots, but vegetation was taller on ungrazed plots. Combined, our results suggest that low intensity grazing leads to grassland habitat change with both negative and positive effects on Vesper Sparrows and Western Meadowlarks, resulting in no net change in their broad-scale abundance.
Acetylene - Argon Plasmas Measured at a Biased Substrate Electrode for Diamond-Like Carbon Deposition. Part 1: Mass Spectroscopy
A. Baby,C. M. O. Mahony,P. D. Maguire
Physics , 2008,
Abstract: We report, for the first time, quadrupole mass spectrometry of neutral and positive ionic hydrocarbon species measured at the rf biased substrate electrode of an inductively coupled plasma for acetylene rich C2H2:Ar mixtures under various bias, frequency and pressure conditions. It has been observed that, irrespective of initial gas mixture, the resultant plasma is dominated by argon neutrals and ions. This is attributed to highly efficient conversion of acetylene to C2H due to the enhanced electron density compared to a standard capacitive plasma where the acetylene (neutral and ion) species remain dominant. This conversion may be crucial to film formation via inert rather than hydrocarbon ion bombardment. In addition, the transient formation of CH4 from acetylene has been discovered using IR absorption spectroscopy with time constants similar to observed pressure variations. Rate coefficients and rates for many of the reaction mechanisms, calculated using measured EEDFs and species densities, are given. These results have important application in plasma models and growth studies for hydrogenated amorphous or diamond-like carbon film deposition. Film growth under similar plasma conditions is reported in an associated paper along with ion energy distributions for important growth species.
Nicholls Lopeandía,Nancy;
Historia (Santiago) , 2010, DOI: 10.4067/S0717-71942010000100002
Abstract: the article deals with the history of the whaling society of magallanes since its formation in 1906 until its dissolution in 1916. the first part describes the society using primary sources including newspapers from magallanes and travel accounts written by explorers and foreign travelers during the period. the second part reflects on the significance this whaling company had in economic and geopolitical terms. there is consideration of the absence of the idea of a sustainable exploitation of whales in the antarctic region at the beginning of the twentieth century. finally, the article reflects about the heroic imaginary elaborated during the period and years later in the varied literature about the whaling society of magallanes.
Nancy Nicholls Lopeandía
Historia (Santiago) , 2010,
Abstract: El artículo investiga la historia de la Sociedad Ballenera de Magallanes, desde su formación en 1906 hasta su disolución en 1916. Una primera parte está destinada a la descripción de la Sociedad, utilizando fuentes primarias como periódicos de la época de la región de Magallanes y diarios de viaje de exploradores o viajeros extranjeros. La segunda parte reflexiona en torno a los significados de la empresa ballenera en estudio, destacándose su rol económico y geopolítico. Se aborda la ausencia de un concepto de sustentabilidad aplicable a la cacería antártica de la ballena a principios de siglo, fenómeno palpable en el caso de estudio. Finalmente se reflexiona en torno al imaginario de heroicidad presente en la época y en una variada literatura de la segunda mitad del siglo XX, en relación a la cacería de ballenas y específicamente a la Sociedad Ballenera de Magallanes. The article deals with the history of the Whaling Society of Magallanes since its formation in 1906 until its dissolution in 1916. The first part describes the Society using primary sources including newspapers from Magallanes and travel accounts written by explorers and foreign travelers during the period. The second part reflects on the significance this whaling company had in economic and geopolitical terms. There is consideration of the absence of the idea of a sustainable exploitation of whales in the Antarctic region at the beginning of the Twentieth Century. Finally, the article reflects about the heroic imaginary elaborated during the period and years later in the varied literature about the Whaling Society of Magallanes.
Caracterización de los aceites crudo, neutro y decolorado de la pulpa y cascara de la fruta silvestre Paraqueiba sericea tulasne Umarí .
Chasquibol Silva, Nancy A.
Grasas y Aceites , 1997,
Abstract: Crude, neutro and blenched oil extracted from pulp and peel of jungle fruit Paraqueiba sericea tulasne Umarí were studied. The crude oil was extracted with hexane by the soxhlet method giving a 47.86% yield, a 31.72% yield in neutro oil and a 94.89% yield in blenched oil. Chemical and physical constants were determined. In addition, five methyl esters of fatty acids were quantitatively determined by GLC using DEGS as stationary phase. The results indicated that Umarí oil belongs to a not drying type with a high content of unsaturated fatty acids principaly oleic. The analytical values obtained confirm the convenience of using Umarí oil in food and cosmetic industries. Se estudian los aceites crudo, neutro y decolorado del fruto del Umarí. La extracción del aceite crudo se realizó mediante hexano por el método de soxhlet. El rendimiento fue de un 47,86% en aceite crudo, 31,72% en aceite neutro y 94,89% en aceite decolorado. Por métodos analíticos se determinaron constantes químicas y físicas. Además por cromatografía gas-líquido se cuantificaron cinco esteres metílicos de ácidos grasos, usando DEGS como fase estacionaria. Los resultados del estudio indican que el aceite de Umarí corresponde a un aceite del tipo no secante y con alto contenido de ácidos grasos insaturados principalmente oleico. Los índices analíticos obtenidos confirman la conveniencia de usar aceite de Umarí para aplicaciones en alimentos y cosmética.
Preliminary Report of a Pilot Tele-Health Palliative Care and Bioethics Program for Residents in Skilled Nursing Facilities
Sean O’Mahony, Patricia Marthone, Gabriella Santoro, Clare Horn, Sandy Selikson, Tia Powell, Hannah Lipman, Mary Pat Gorman-Barry, Robin Tucker, Nancy Dubler and Peter Selwyn
Palliative Care: Research and Treatment , 2012,
Abstract: Currently about 25% of Americans die in nursing homes, many with poorly controlled pain and other symptoms, with minimal provisions for psychosocial support. New models are necessary to lessen structural and process barriers to give effective end-of-life care in nursing homes. Objectives: 1) To extend hospital-based Bioethics Consultation Services (BCS) and Palliative Care Services (PCS) at Montefiore Medical Center (MMC) in the Bronx to two local Skilled Nursing Facilities (SNFs), Morningside House Aging in America (MSH) using direct face-to-face consultations and Beth Abraham Health Systems (BAHS) via video consultations (VC); 2) Achieve improvements in quality of life and comfort for elderly residents and their families; 2a) Improve the level of practice and increase staff satisfaction with palliative care content-related knowledge and bioethical analysis. Methods: We report preliminary findings of this two group quasi experimental project with results of pre- and post- tests rating content-related knowledge in aspects of end-of-life care for staff. Select pre-test and post-test questions were given to physicians and other staff, but were re-configured for, registered and licensed practice nurses, social workers, and certified nursing assistants from the End-of-Life Physician Education Resource Center (EPERC). Patient, family, and staff ratings of the quality of palliative care were measured with a Palliative Outcomes Scale (POS) one week prior to and post consultation. Results: 72 staff attended in-services; 53 completed pre-tests and 49 post-tests. Overall knowledge scores increased for 9 of the 16 items that were analyzed. There were improvements in knowledge scores in 12 of 16 items tested for staff content related knowledge which were statistically significant in regard to management of cancer pain from 63.8% to 81.5% (p = 0.03) and a trend to significance for assessment and management of delirium from 31.6% to 61.9% (p = 0.073). Seventy five POS surveys were completed from 13 video-conferenced Palliative Care consultations and 14 direct face- to-face consultations from March 2008 to January 2009. There were improvements in ratings for some aspects of quality of care on the POS. Patient and staff aggregate response scores for the POS were significantly improved between baseline and follow-up (Wilcoxon signed-rank test p = 0.0143 and p = 0.005) at the videoconsultation site and for family and staff at the face-to-face consultation site (Wilcoxon signed-rank test p = 0.0016 and p = 0.0012). Conclusion: Preliminary evidence suggests that use of real time videoconferencing to connect hospital-based Bioethics and Palliative Care clinicians with patients, families, and staff in Skilled Nursing Facilities may enhance some aspects of end-of-life care for their residents, as well as content related knowledge in core aspects of end-of-life care for interdisciplinary groups of staff or caregivers.
A Successful Pregnancy Outcome after Surgical Decompression of Type I Arnold-Chiari Malformation  [PDF]
Patricia Ip, Susmita Pankaja, Fidelma O’Mahony
Open Journal of Obstetrics and Gynecology (OJOG) , 2015, DOI: 10.4236/ojog.2015.51007
Abstract: Type I Arnold-Chiari malformation (ACM) usually presents in adulthood and consists of a downward displacement of the cerebellar tonsils through the foramen magnum. A 25-year-old woman presented with a 5-month history of headache associated with blurred vision, tinnitus and sickness. Imaging recognised the need for surgical intervention, but whilst awaiting for surgery she fell pregnant. Considering the risks of neurological deterioration, the woman underwent surgical decompression of type I ACM at 15 weeks gestation. She subsequently presented with progressively worsening headaches during late pregnancy from 35 weeks. The obstetric plan was initially induction of labour at term but since the onset of worsening symptoms, this date was brought forward to 39 + 1 weeks gestation. She proceeded to have a normal delivery with no neonatal complications and an uneventful puerperium followed. Since the delivery, the patient reported fewer symptoms, showed no signs of neurological deficit and a repeat magnetic resonance imaging of the head showed good relief of neural compression. This case illustrates how judicious selection of the appropriate mode of delivery of women following surgically corrected ACM and a multidisciplinary approach is critical in the successful management of the antepartum period and labour.
Neuroendocrine Liver Metastases and Orthotopic Liver Transplantation: The US Experience
N. Thao T. Nguyen,Theresa R. Harring,John A. Goss,Christine A. O'Mahony
International Journal of Hepatology , 2011, DOI: 10.4061/2011/742890
Abstract: Liver transplantation remains a controversial therapy for Neuroendocrine liver metastases (NLM), with coflicting suvival data reported. The aim was to assess the evolution of outcomes for patients transplanted for NLM in the US, both before and after the introduction of the MELD scoring system in 2002. The UNOS/OPTN database was reviewed to identify patients diagnosed with NLM who subsequently underwent a liver transplantation from 1988 to March 2011 (=184); Patient survival was determined using Kaplan-Meier methods and log-rank tests, and cox regression analysis was performed, using SPSS 15.0 (SPSS, Inc, Chicago, IL). The overall NLM patient survivals in the pre-MELD era were 79.5%, 61.4%, and 49.2% at 1, 3, and 5 years, respectively. After the introduction of the MELD score, NET/NLM patients had improved overall patient survivals at 1, 3, and 5 years of 84.7%, 65%, and 57.8%. Patients transplanted after 2002 had an improved survival outcome. Notably, the overall patient survival for NET is not significantly different when compared to the outcomes of patients transplanted for HCC, in the current era. This progress acknowleges the significant improvement in outcomes for NLM patients after liver transplantation and the potential for further gain in the survival of otherwise nonsurgical, terminal patients.
Treatment of Liver Metastases in Patients with Neuroendocrine Tumors: A Comprehensive Review
Theresa R. Harring,N. Thao N. Nguyen,John A. Goss,Christine A. O'Mahony
International Journal of Hepatology , 2011, DOI: 10.4061/2011/154541
Abstract: Patients diagnosed with Neuroendocrine Tumors (NET) often are also diagnosed with Neuroendocrine Liver Metastases (NLM) during the course of their disease. NLM can cause significant morbidity and mortality, oftentimes much more than compared to patients with NET. Treatment options have been limited in the past, focusing on surgical resections, for which only a minority of patients are candidates. However, developments of new treatment modalities have progressed rapidly and patients with NLM now have significantly more options, including surgical-directed therapies; liver-directed therapies; and nonsurgical, non-liver-directed therapies. This review provides information about the roles of hepatic resection, orthotopic liver resection, radiofrequency ablation, hepatic artery embolization and hepatic artery chemoembolization, hepatic artery radioembolization and selective internal radiation therapy, peptide receptor radionuclide therapy, systemic chemotherapy, biotherapies including somatostatin analogs and interferon-α, vascular endothelial growth factor and mTOR targets, and microRNA-regulated pathways. Given these new options, the clinician can tailor therapy specific to the patient diagnosed with NLM, thereby giving the patient the best possible chance of prolonged survival.
Biliary Adenofibroma with Carcinoma In Situ: A Rare Case Report
N. Thao T. Nguyen,Theresa R. Harring,Laurie Holley,John A. Goss,Christine A. O'Mahony
Case Reports in Hepatology , 2012, DOI: 10.1155/2012/793963
Abstract: This case report exhibits a rare biliary tumor within the liver of a 53-year-old Caucasian woman. This exophytic, multicystic, 6.5 × 5.0 cm mass was composed of complex tubulocystic structures lined by nonmucin-secreting, biliary epithelium embedded in fibrous stroma, consistent with biliary adenofibroma. This is the seventh case described in the literature. Multiple foci of high-grade dysplasia/carcinoma in situ were found with a microscopic focus of invasive carcinoma in review of the pathology, making this only the second case reporting malignant transformation. It is presented to illustrate the premalignant potential in a biliary epithelial tumor currently categorized as benign.
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