The purpose of this study was to determine the lung impact from working within the Libyan quarry industry, and if the length of work impacted the degree of degradation. Eighty three workers from eight silica quarries in the Nafusa Mountains of Libya opted to participate. These quarries were working the upper cretaceous geological structure. Eighty-five individuals who lived in Gharyan City with no affiliation to quarry operations participated as controls. Spirometry variables evaluated were Forced Vital Capacity (FVC), Forced Expiratory Volume at 1.0 second (FEV1), FVC/FEV1 and Peak Expiratory Flow (PEF). Control and exposed groups had no differences in terms of height, weight, or smoking status (p = 0.18, 0.20, 0.98, respectively). Prior to adjustment for other variables, FVC, FEV1, and PEF are all significantly lower in the exposed group (p = 0.003, 0.009, 0.03, respectively). After adjustment for age, height, weight, and smoking status, there remain significant differences between the control and exposed groups for FVC, FEV1, and PEF. This analysis demonstrated that exposure to quarry dust has a detrimental effect on lung function, and that pre-revolution Libyan quarry workers were being exposed. This study shows that any exposure is harmful, as the reduction in lung function was not significantly associated with years of exposure.
Objectives: This study was designed to investigate the concentration of calcium level in blood of breast, artificial and mixed feeding babies. Methods: The total number of babies covered were 269 babies of different ages, however, the babies were divided into four groups, including group (I) consists of 98 male and female babies aged between (1 day -6 months), group (II) consists of 53 male and female babies aged between (7 m -12 m), group (III) consists of 59 male and female babies aged between (13 m -18 m), and group (IV) consists of 59 male and female babies aged between (19 m -2 m). Results: The mean concentration of serum blood calcium in breast feeding (9.25 mg/dL) was significantly lower (P < 0.05) than artificial feeding (9.79 mg/ dL) and mixed feeding (9.88 mg/dL). Meanwhile, the mean concentration of serum blood calcium level (8.93 mg/ dL) in babies aged between (13 m-18m) was significantly lower (p<0.05) than other aged groups. However, the effect of the babies’ gender o the concentration of calcium indicated that the serum calcium levels did not show any significant difference among males and females’ babies. Conclusion: The relationship between age type of feeding and the gender show a correlation among the factors studied, therefore, it can be concluded that the babies fed on mixed milk got a benefit regarding the levels of these minerals as their serum levels are higher than the serum levels of babies fed on breast and artificial milk.
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