Front Matter: Environmental Health and Safety for Hazardous Waste Sites

Barth, Richard C.; George, Patricia D.; Hill, Ronald H.

doi:10.3320/978-1-931504-27-0.fm1

Cited by 2 publications

(2 citation statements)

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“…Different studies showed that workers of mining, casting, bakeries, and smelting are strongly faced with the heat stress [4]. In such situations, the human body makes some physiological responses, known as strain, which increases the heart beat rate per minute for a one-degree rise in the body's temperature [5].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Background Induced Temperature in and Around Bakery Ovens for Some Selected Locations in Calabar

Kamgba

2019

AJARR

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Estimation of background induced temperature from six selected Bakery Ovens in Calabar was investigated. An in-situ measurement approach was adopted in order to quasi-accurately estimate temperature of Oven; wind speed in bakery and ambient temperature around the bakery. The relationships between the measured parameters were obtained from plots of wind speed against Temperature and Temperature of oven against distance from Oven. Statistical correlations of wind speed values and temperature were estimated, which yielded a good positive correlation coefficient for wind speed and temperature in all cases and for all the six locations under study, with the relevant plots; these clearly show that all of the two parameters; wind speed and temperature are necessary to be used in analysing and assessing the wellbeing of workers in the perceived heat stressed environment. On the other hand, the coefficient of determination value shown on each of the correlation plots depicts that the models relating the Temperature and wind speed in each case respectively are good performing models. It was found out that the temperature exposure of workers in all the bakeries under study exceeded the WHO (20oC -29oC) exposure limit for comfort. All the bakeries visited during this study used firewood industrial oven.

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Section: Introductionmentioning

confidence: 99%

Estimation of Background Induced Temperature in and Around Bakery Ovens for Some Selected Locations in Calabar

Kamgba

2019

AJARR

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“…The LD 50 is the median lethal dose of a substance; it is used to determine the potential impact of substances on different types of organisms and therefore determines the quantity of a substance required to cause death to 50% of a population (Barth et al . 2002). Amberger (1989) reported that LD 50 value of DCD is 10 g/kg LWT of humans.…”

Section: Discussionmentioning

confidence: 99%

Applying urine collected from non-lactating dairy cows dosed with dicyandiamide to lysimeters and grass plots: effects on nitrous oxide emissions, nitrate leaching and herbage production

et al. 2015

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SUMMARYIn agricultural production systems, nitrogen (N) losses to the environment can occur through nitrous oxide (N2O) emissions and nitrate (NO3−) leaching. The objectives of the present study were to evaluate: (1) if urine excreted by non-lactating dairy cows pulse-dosed with dicyandiamide (DCD) and applied to lysimeters reduced N2O-N emissions and NO3−-N leaching on two soil types; and (2) if urine + DCD would increase herbage production over winter. Lysimeters were used to measure N2O emissions and NO3-N leaching. The soils used were a free-draining acid brown earth of sandy loam to loam texture (termed free-draining) and a poorly drained silt loam gley (termed poorly drained). Grass plots were established on the free-draining soil to measure herbage production. The N loading rate of the urine + DCD was 508 kg N/ha and the urine without DCD (urine only) was 451 kg N/ha. Total NO3−-N leaching losses from the free-draining and poorly draining soils were reduced from 100 and 81 kg NO3−-N/ha on the urine-only treatment, respectively, to 9 and 11·6 kg NO3−-N/ha on the urine + DCD treatment, respectively. Total N2O-N emissions from the free-draining and poorly drained soils were reduced significantly from 13·6 and 12·1 kg N2O-N/ha on the urine-only treatment, respectively, to 2·23 and 5·24 kg N2O-N/ha on the urine + DCD treatment, respectively. Applying urine with DCD to pastures inhibited the nitrification process for up to 56 days after treatment application. In the current experiment, there was no significant effect on spring herbage production when urine + DCD was applied to grass plots. Therefore, feeding DCD to dairy cows to apply DCD directly in urine patches was shown to be an effective mitigation strategy to reduce NO3−-N leaching and N2O-N emissions but did not appear to increase spring herbage production.

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Front Matter: Environmental Health and Safety for Hazardous Waste Sites

Cited by 2 publications

References 0 publications

Estimation of Background Induced Temperature in and Around Bakery Ovens for Some Selected Locations in Calabar

Estimation of Background Induced Temperature in and Around Bakery Ovens for Some Selected Locations in Calabar

Applying urine collected from non-lactating dairy cows dosed with dicyandiamide to lysimeters and grass plots: effects on nitrous oxide emissions, nitrate leaching and herbage production

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