J Occup Environ Hyg
December 2024
The ongoing resurgence of severe Coal Workers' Pneumoconiosis in the US has been linked to overexposure to respirable crystalline silica (RCS, which is predominantly present as quartz and regulated as such). Capabilities that enable more frequent RCS monitoring are highly sought. Recent developments include field-based quartz analysis of traditional filter samples-collected on polyvinyl chloride (PVC) filters-using portable Fourier Transform Infrared spectroscopy (FTIR).
View Article and Find Full Text PDFGenetic defects in various red blood cell (RBC) cytoskeletal proteins have been long associated with changes in susceptibility towards malaria infection. In particular, while ankyrin (Ank-1) mutations account for approximately 50% of hereditary spherocytosis (HS) cases, an association with malaria is not well-established, and conflicting evidence has been reported. We describe a novel N-ethyl-N-nitrosourea (ENU)-induced ankyrin mutation MRI61689 that gives rise to two different ankyrin transcripts: one with an introduced splice acceptor site resulting a frameshift, the other with a skipped exon.
View Article and Find Full Text PDFThe blood stage of the plasmodium parasite life cycle is responsible for the clinical symptoms of malaria. Epidemiological studies have identified coincidental malarial endemicity and multiple red blood cell (RBC) disorders. Many RBC disorders result from mutations in genes encoding cytoskeletal proteins and these are associated with increased protection against malarial infections.
View Article and Find Full Text PDFGen Comp Endocrinol
September 1998
To determine the onset of puberty in Arabian oryx (Oryx leucoryx), a longitudinal study was conducted in 5 captive males at the National Wildlife Research Centre, Taif (Saudi Arabia). From birth to 20 months of age, twice weekly, animals were weighed and blood was assayed for LH and testosterone. Four periods were defined by analysis of the hormonal profile.
View Article and Find Full Text PDFThe reproduction of the Arabian oryx (Oryx leucoryx) has been studied in a breeding center in Taif (Saudi Arabia). In the first experiment, three groups of females were assigned to groups immediately after calving. In group 1, from the day of calving the females had visual and olfactory but not physical contact with a male.
View Article and Find Full Text PDF