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J J Leahy

Publications and source records attributed to J J Leahy.

8 recordsLinked to original sources
PubMed2003

Emissions modeling of fluidised bed co-combustion of poultry litter and peat.

Gaseous emissions from the fluidised bed co-combustion of 50% w/w chicken litter and peat were monitored and recorded. Emission data were used to create a dispersion model for a proposed site on a poultry farm in Ireland. Variables within the combustion unit influenced both combustion and emission levels of pollutants such as SO(2) and NO(x), CO. Concentrations of atmospheric pollutants decreased with use of the correct ratio between fluidising and secondary air. Dispersion modelling of combustion at a proposed poultry unit predicted that ground level concentrations for the set of emissions data would be below the limits and guidelines set by air quality standards.

Air Pollutants↗
PubMed2003

Monitoring and dispersion modelling of emissions from the fluidised bed combustion of poultry litter.

Gaseous emissions from the fluidised bed combustion of chicken litter were monitored and recorded. Emission data was used to create a dispersion model for a proposed site on a poultry farm in Limerick, Ireland. Variables within the combustion unit not only influenced combustion but also emission levels of pollutants such as SO2 and NOx. CO emissions decreased with use of the correct ratio between fluidising and secondary air, the staging of secondary air and the degree of turbulence with which the secondary air is introduced. Dispersion modelling of actual combustion at a proposed poultry unit predicted that ground level concentrations for the set of emissions data would be below the limits and guidelines set by air quality standards. This was true for both and line source. Line source concentration levels were less than those for point source.

Air Pollutants↗
PubMed2002

Advances in poultry litter disposal technology--a review.

The land disposal of waste from the poultry industry and subsequent environmental implications has stimulated interest into cleaner and more useful disposal options. The review presented here details advances in the three main alternative disposal routes for poultry litter, specifically in the last decade. Results of experimental investigations into the optimisation of composting, anaerobic digestion and direct combustion are summarised. These technologies open up increased opportunities to market the energy and nutrients in poultry litter to agricultural and non-agricultural uses. Common problems experienced by the current technologies are the existence and fate of nitrogen as ammonia, pH and temperature levels, moisture content and the economics of alternative disposal methods. Further advancement of these technologies is currently receiving increased interest, both academically and commercially. However, significant financial incentives are required to attract the agricultural industry.

Abattoirs↗
PubMed1987

Brain stem anesthesia after retrobulbar block.

Presented is a series of eight patients in whom neurologic sequelae developed after retrobulbar anesthesia. All patients demonstrated blockade of one or more cranial nerves and six progressed to apnea, requiring intubation and mechanical ventilation. Neurologic findings included amaurosis in the contralateral eye (5 patients), nonreactive pupil in the contralateral eye (6 patients), ductional defects (2 patients), and dysphagia (4 patients). In all cases, these findings resolved in 2 to 12 hours. In patients who progressed to apnea, spontaneous respiration resumed within 30 to 60 minutes. These findings are particularly significant in light of recent decisions to reduce anesthesia coverage for cataract surgery in some regions.

Adult↗
PubMed1986

Management of perioperative hypertension using sublingual nifedipine. Experience in elderly patients undergoing eye surgery.

Sublingual nifedipine was administered perioperatively to 19 elderly (age, greater than or equal to 60 years) patients undergoing ophthalmologic surgery. All of the patients had blood pressures exceeding 200 mm Hg systolic or 110 mm Hg diastolic, and 18 of the patients had both. Average (mean +/- SD) systolic blood pressure fell from 224.9 +/- 13.9 mm Hg to 154.6 +/- 19.0 mm Hg, while average diastolic blood pressure was reduced from 121.5 +/- 12.2 mm Hg to 78.1 +/- 10.6 mm Hg. Mean time to onset of response to nifedipine was 9.47 +/- 3.9 minutes, while the maximum antihypertensive response occurred in 35.3 +/- 10.2 minutes. A prompt antihypertensive response was obtained without any serious side effects. To our knowledge, this is the first reported study demonstrating the efficacy and safety of using sublingual nifedipine for the management of perioperative hypertension.

Aged↗
PubMed1969

Cobaltous ion effect on diauxie.

Cobaltous ions extended the duration of the diauxic lag in Escherichia coli K-12. Growth in glucose in the presence of Co(++) was necessary for the effect. Medium in which cells had been grown in the presence of Co(++) produced an extended lag when inoculated with fresh cells and lactose. Valine was found in this medium. Reversal of the extended lag was brought about by addition of l-isoleucine and related l-amino acids, but not by several metal ions. Cobaltous ion does not inhibit beta-galactosidase or the galactoside permease. These results, together with the known growth sensitivity of K-12 to valine, indicate that Co(++) disturbs the normal valine-isoleucine balance.

Cobalt↗