A5076768775- Geochemistry and Geologic Mapping
- Radioactivity and Radon Measurements
- Spectroscopy and Chemometric Analyses
- Soil Geostatistics and Mapping
- Heavy metals in environment
- Spectroscopy Techniques in Biomedical and Chemical Research
- Water Quality Monitoring and Analysis
- Pesticide Residue Analysis and Safety
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Radioactive contamination and transfer
- Remote-Sensing Image Classification
- COVID-19 impact on air quality
- Identification and Quantification in Food
- Arsenic contamination and mitigation
- Musculoskeletal synovial abnormalities and treatments
- Sarcoma Diagnosis and Treatment
- Soil Carbon and Nitrogen Dynamics
- Astrophysics and Cosmic Phenomena
- Electrical and Bioimpedance Tomography
- Air Quality Monitoring and Forecasting
- Nuclear and radioactivity studies
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactive element chemistry and processing
- Advanced Chemical Sensor Technologies
University of Nairobi
2012-2025
Aga Khan University Nairobi
2023
Aga Khan University Hospital Nairobi
2023
This study reports on natural radioactivity levels and radiation risk estimates from soil samples collected in five villages near the Manyoni Uranium Deposit central Tanzania. The mean activity concentrations of 40K, 232Th, 238U were 207 Bq kg-1, 78 302 respectively. While 40K below world average, 232Th more than 1.7 9.2 times higher average values. absorbed dose rate for area was 196 nSv h-1. Annual effective estimate values outdoor indoor exposure 0.24 mSv 0.96 mSv, respectively, exceeding...
Soil quality assessment (SQA) is important for modulating agricultural productivity and thus requires simple rapid analysis of soil (macro & micro) nutrients (here called indicators – SQIs). We report proof concept a chemometrics‐assisted energy dispersive X‐ray fluorescence scattering (EDXRFS) spectroscopy technique direct SQIs. The EDXRFS method exploits, in addition to fluorescence, the scatter peaks obtained non‐invasively from soils develop calibration strategy quantitative SQIs...
The paucity of fine particulate matter (PM
This study investigates the utility of using remote sensing and geographic information system techniques to accurately infer presence radioactive minerals in a typical high background radiation area (HBRA) by analyzing spectral signatures associated soil, rocks vegetation. To accomplish this, both unsupervised (K-Means Clustering) supervised classification based on maximum likelihood classifier (MLC) were applied Landsat-8 Imager data from Mrima Hill Kenya's south coast. The hill is...
The accurate detection of pesticide residues in fresh produce is essential for public health. This study evaluated the use two-dimensional correlation spectroscopy (2D-COS), specifically applied to Raman data, combined with principal component analysis (PCA) and support vector machines (SVMs) direct rapid chlorothalonil four different vegetable matrices. approach significantly enhances spectral resolution, enabling identification subtle chlorothalonil-specific fingerprints. spectra were...
Abstract Introduction Pigmented villonodular synovitis (PVNS), a subtype of tenosynovial giant cell tumours, is rare non-cancerous proliferative synovial disorder usually affecting the knee in adults(1). The incidence rate 1.8 patients per million people general population, with few reports amongst paediatric hence it frequently misdiagnosed(2). It has slow onset symptoms and been noted to take ∼18 months make definitive diagnosis(3). Objective To describe case pigmented seventeen-year-old...