Monitoring Pollutant Emission with QC Laser Based Mid IR Sensors

Current progress in Mid-IR semiconductor laser technology established on inter-sub-band changed like quantum wells assure a remarkable impact on tunable diode laser-based sensors for trace gases

Multiyear Satellite Total Ozone Column Dimension within West Africa

Total Ozone Mapping Spectrometer (TOMS*) mechanisms have been flown on NASA/*GSFC satellites more than 20 years. They present close to realdnine ~o/.?one data pro Atmospheric Science Research. As elemental of preface energy structured to build up a Lidar base in Nigeria for monitoring the atmospheric ozone and aerosol stratum. The monthly mean TOMS* total column ozone measurements amid 1978~1999 have been evaluated. The tendency of the total column ozone illustrates a spatial and sequential dissimilarity with cryptogram of the Quasi Biennial Oscillation (QBO) all through this 21-year research epoch; The standards of TOMS* total ozone vertical, over Nigeria (4-15o

Radiance simulations of selected atmospheric species at different observer attitudes for ground-based FTIR spectroscopy: implications for aerosol polluted sites in West Africa

The pure air and clear sky conditions necessary for continuous Fourier Transform Infra-Red (FTIR) measurements of trace gases are issues of concern for West African sites. This is due to possible severe interruption by Sahara dust outbreak, which leaves trails throughout the year. Using data simulated by means of an atmospheric radiative transfer code, it is strengthened that the lower strengths observed for selected trace gas absorption spectra for higher observation altitudes may imply that increasing measurement altitudes or initiating balloon measurements to avoid aerosols and its associated haze conditions would be at the risk of managing reduced FTIR signatures. Continuous FTIR measurements in aerosol-polluted regions on the other hand can be a novel method for establishing more links between mineral aerosols and trace gas mixing ratios and or heterogeneous chemistry. Keywords: Trace gases, FTIR, spectroscopy, aerosols, and atmospheric pollution. Nigerian Journal of Physics Vol. 18 (2) 2006: pp. 227-23

Analysis on Many-year Ground Based Sunphotometer (AERONET) Aerosol Optical Properties and its Similarity with Satellite Observations in IIorin, Cape Verd, Agoufou and Banizoumbou in West Africa

Sahelian in West Africa within Long 20oW: 20oE, Lat 0:30oN through its climatic process and geographical environmental state is a major region for the distinctive of universal atmospheric aerosol optical properties. This research evaluates the spatial and secular variant of Aerosol Optical Depth AOD-441nm, aerosol particulate size categorization Angstrom exponent ?441-676nm at different four sites IIorin, Cape Verde, Banizoumbou and Agoufou. Outcomes for everyday AOD-441nm differences as well as the regular and yearly changes are presented to ascertain the aerosol climate changes in the region. We evaluated satellite resultant data of Total Ozone Mapping Spectrometer for Aerosol Index MODIS Terra and Aqua, TOMS AI with individuals of ground based Sunphotometer AERONET dimensions. Generally, presently exit good connection between ground-based AERONET dimensions and MODIS Aqua and Terra with correlation coefficients, R2, 0.9 details in all stations. Though low coefficients low as 0.41 were ascertained in all the locations for regressions amid TOMS AI and ground based Sunphotometer AERONET data. &nbsp

Retained Surgical Instruments in The Pelvis Complicated by Colo-vesical Fistula

Retaining a surgical instrument in the patient unintentionally could lead to serious complications and in extreme cases, death. It also damages the reputation of the healthcare provider, as well as the health facility involved. We report a case of retained haemostat and dissecting forceps complicated by colo-vesical fistula 10 years after hysterectomy in a 50-year-old lady with a 7-month history of passage of urine per rectum. The foreign bodies were removed as well as an associated bladder calculus. The fistulae were repaired and recovery was uneventful