![]() ![]() There was a strong relationship (r = 0.777) and statistically significant (p = 0.000) between air lead levels and BLLs. The respondents' average BLLs were 8.58 µg/dL, with intervals of 3.8-14.6 µg/dL. Linear regression test to determine the relationship between lead variables in the air and BLLs. ![]() Normality test on BLLs and lead variables in the air. The concentration of lead in the air was measured using a High Volume Air Sampler and analyzed by atomic absorption spectrometry. Each respondent took a venous blood sample and measured it with a portable blood lead gauge. Cross-sectional study design, the study population was children aged 7-13 years in selected ULAB areas, with a total sample of 94 people. This study uses secondary data from the 2014 Special Research on Environmental Pollution for Traditional Battery Processing conducted by the National Institute of Research and Development. This study aims to determine the effect of air lead concentration on Blood Lead Levels (BLLs) in children aged 7-13 years in the informally ULAB area in the city of Depok. The informal Used Lead-Acid Battery (ULAB) activities impact air pollution from smoke, dust, and waste containing lead. By statistic analytical from weight uniformity, hardness and disintegration time give significant difference with sig. ![]() ![]() F3 hardness is 4,275 kg is the best from F1 and F2. All the formulas by weight and size uniformity and disintegration time fulfill the requirements. The formulation divided into three groups, that is F1 (chitosan : PVP K-30 = 1 : 1 solid dispersion), F2 (chitosan : PVP K-30 = 1 : 3 solid dispersion), and F3 (pure chitosan). Hence the tablets were evaluated by weight and size uniformity, hardness, friability, and disintegration time. The result of chitosan solid dispersion was then molded into tablets by the direct compression method. Chitosan solid dispersion made by the solvent evaporation technique used PVP K-30 as the carriers. Chitosan has poor solubility in water but high permeability, so to improve bioavailability is by making solid dispersions. An alternative to overcome this environmental disturbance phenomenon is to utilize shrimp shells containing chitin and subsequently transformed into chitosan that can be applied in various fields. Underutilized waste causes environmental problems. The head, shell, and tail are thrown away without any prior processing. Whiteleg shrimp (Litopenaeus vannamei) on the market are processed or sold only to take part in the meat. ![]()
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