Physico-chemical and thermal characteristics of sandy loam soils contaminated by single and mixed pollutants (mineral and vegetable oils).

Samples of contaminated top soil (0-30 cm) and uncontaminated soil (control) from two locations in Precambrian basement complex area were analyzed to assess the effects of single and mixed oil contaminants on the physico-chemical and thermal properties of soils. Pearson's correlation and analysis of variance (ANOVA) were used to study the interrelationships of the studied parameters as well as variation of studied soil characteristics under the different oil contaminants, respectively. Results showed insignificant impact of pollutant(s) on the textural class of contaminated soils.

Geostatistical analysis of uranium concentrations in North-Western part of Ogun State, Nigeria.

Several statistical techniques have been adopted in the analysis and interpretation of radiometric survey data set with little attention to the geostatistical approach. In this study, the geostatistical technique was used to analyse an airborne uranium data set in the North-western part of Ogun state to deduce the autocorrelation level of uranium with the corresponding geological composition through the geostatistical model fitting. Twelve uranium lithological (UL) units were identified and analysed using variogram and kriging.

Assessment of microbial and heavy metal contamination in shallow hand-dug wells bordering Ona River, Southwest Nigeria.

Ona River is one of the three major rivers draining the city of Ibadan. Groundwater is the major source of drinking water in the metropolis; however, data on quality of shallow aquifers bordering Ona River is relatively scarce. This study aimed to evaluate bacteriological status, heavy metal content, and associated human and ecological health risks in hand-dug wells nearby Ona River.

Comparison of a manometric tear duct irrigation test with dacryoscintigraphy in the investigation of epiphora.

Purpose: Assessment of lacrimal resistance in patients with patent lacrimal systems is important in determining whether dacryocystorhinostomy (DCR) surgery is appropriate. Current techniques, including lacrimal syringing and dacryoscintigraphy (DSG), can be unreliable. We compare the results of a manometric tear duct test (mTDT) irrigation technique with DSG in these patients.

Soil physicochemical and hydraulic properties of petroleum-derived and vegetable oil-contaminated Haplic Lixisol and Rhodic Nitisol in southwest Nigeria.

Various daily human activities can result in the release of pollutants of different chemical constituents and specific gravities into natural soils. Pollution of natural soils is a recurring occurrence in the environment and it contributes greatly to the alteration of soils properties. The results of an assessment of the effects of selected petroleum-derived and vegetable oils on soil physicochemical and hydraulic properties are presented in this work.

Assessment of lacrimal resistance using a manometric tear duct irrigation system.

Lacrimal surgery aims to provide a low-resistance tear drainage passage. An assessment of lacrimal resistance guides decisions on surgery. We present results of a modified tear duct irrigation system that reliably measures lacrimal outflow resistance.

Assessment of patient-reported outcome and quality of life improvement following surgery for epiphora.

PurposeTo assess and compare the subjective improvement in symptoms and quality of life in adult patients who underwent commonly performed oculoplastic surgical interventions to treat epiphora.Materials and methodsA prospective study was undertaken involving all adult patients undergoing dacryocystorhinostomy (DCR), lid tightening (lateral tarsal strip or lateral wedge resection), and punctoplasty surgery at our institution. We assessed severity of epiphora preoperatively using the Munk score.

Combined hamartoma of the retina and retinal pigment epithelium.

We report two cases of combined hamatoma of the retina and retinal pigment epithelium (CHR-RPE), illustrated with ultrasonography, optical coherence tomography, fundus fluorescein angiography and indocyanine green angiography images. CHR-RPE could clinically mimic several other retinal conditions. Failure to distinguish it from serious malignancies such as choroidal melanoma or retinoblastoma has led to unnecessary enucleation in the past.

Childhood head injury in Ibadan: causes, neurologic complications and outcome.

Ninety-nine children who suffered head injuries between January, 1988 and June, 1989 were analysed. These form approximately 60% of the total number of children with head injury seen at our institution over this period. The mean age (+/- SD) was 77.

Orbital histoplasmosis due to Histoplasma capsulatum var. duboisii: successful treatment with Septrin.

Four children with orbital histoplasmosis caused by Histoplasma capsulatum var. duboisii (one of whom had been unsuccessfully treated with amphotericin-B) were treated with a combination of trimethoprim and sulphamethoxazole (Septrin) and surgical drainage. All patients improved markedly during therapy with resolution of the lesions, and with no recurrence of infection in three patients, 1 year later.

Lens thickness in western Nigeria. A comparative ultrasonic study in Negros and Danes.

A comparative ultrasonic, oculometric study was performed in negroes, West Nigeria (151 persons) and in caucasians, Denmark (88 persons). The negros have thinner lenses than caucasians, and overall ethnic difference of 0.12 mm was found.

Anterior chamber depths of Nigerians.

Anterior chamber depths of 1,646 eyes of 823 Nigerians were measured to determine the distribution of chamber depths in Nigerians, and to compare the findings with previous observations in Caucasians. The persons examined included normal subjects and other groups with ocular pathology, such as glaucoma. The mean chamber depth in normal persons was 3.

Filarial worm (Loa loa) in the anterior chamber. Report of two cases.

Two Nigerian patients with intraocular parasitism by adult Loa loa worms are reported. Whereas Loa loa infestation of the subcutaneous tissues around the eye usually has no permanent effect on visual acuity, in the two cases reported the affected eye became blind.