Manganese exposure and association with hormone imbalance in children living near a ferro-manganese alloy plant

Santos, Nathália R. dos; Rodrigues, Juliana Lima Gomes; Bandeira, Matheus J.; Anjos, Ana Laura dos Santos; Araújo, Cecília de Freitas S.; Adan, Luís; Menezes-Filho, José A.

doi:10.1016/j.envres.2019.02.021

“…We established statistically significant relationships between manganese and lead contents in blood and individual doses inhaled with air inside classrooms based on causeeffect relations modeling (R 2 = 0.13-0.66; 47.32 ≤ F ≤ 603.60; р ≤ 0.00001) (Table 3). Research results regarding metal contents in blood of children and teenagers who live and study under aerogenic exposure to chemical environmental factors are in line with data provided by several authors who accomplished their research on territories where industrial and energy-producing enterprises were located [9][10][11].…”

Section: T a B L E 1 Average Chemical Concentrations Inside Classroomssupporting

confidence: 75%

Regularities in Diseases of the Musculoskeletal System Developing in Schoolchildren Under Complex Exposure to Environmental Factors and Factors Related to Lifestyle

Valina¹,

Shtina²,

Маклакова³

et al. 2021

Health Risk Analysis

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The present research is vital due to diseases of the musculoskeletal system being widely spread and having great social significance as well as a variety of etiological factors that cause this pathology among schoolchildren. Overall, 339 school- children were examined; they attended secondary schools located on territories with different sanitary-hygienic conditions regarding ambient air. Hygienic, clinical-laboratory and instrumental procedures as well as mathematical data processing were applied to fulfill the research tasks. Average daily consumption of food products was estimated as per “Dairies of a weekly schoolchildren’s ration”; specific factors related to lifestyle were estimated via questioning performed with a specifi- cally designed authors’ questionnaire. Children who attended a secondary school in a city where metallic construction mate- rials were manufactured had manganese concentrations in their blood that were by 8–9 % higher than among their counter- parts from the reference group; lead concentrations in their blood were by 1.9–2.2 times higher than in the reference group and by up to 1.7 times higher than background levels. Priority factors that produce such negative effects on health as dis- eases of the musculoskeletal system include the following: school subjects with the same complexity do not interchange with simpler ones in schedules; breaks between classes do not conform to hygienic regulations; food rations are imbalanced as per milk products and eggs; physical training and doing sports are irregular; homework takes longer period of times than before. Average ionized calcium contents in blood of children from the test group were by 9.0–14.0 % lower and hydrocorti- sone contents were by 1.3–1.5 times higher than in the reference group (р=0.0001–0.01). Lower mineral density of bone tissues was by 1.6 times more frequent among children from the test group (р=0.04). Diseases of the musculoskeletal system were 4.6–15 times more probable and scoliosis was 8–11 times more probable due to persistent exposure to manganese and lead, violated hygienic principles of education process organization and food rations, and low physical activity of school- children. Changes in bone metabolism, activation of a stress-releasing system, and a decrease in bone mass are basic etiopa- thogenetic regularities in developing chronic pathology of the musculoskeletal system among schoolchildren associated with exposure to specific environmental factors and factors related to lifestyle.

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“…Параметры моделей зависимости «Доза химического соединения из воздуха учебных помещенийконцентрация химического соединения в крови» Вещество b 0 b 1 F p R 2 Марганец 0,01079 453,20881 47,3183 0,0000 0,13 Свинец 0,01267 10107,92284 603,6043 0,0000 0,66 Полученные в ходе исследования результаты содержания металлов в крови детей и подростков, проживающих и обучающихся в условиях аэрогенного воздействия химических факторов окружающей среды, согласуются с данными исследований ряда авторов, выполненных на территориях размещения промышленных и энергетических предприятий [9][10][11].…”

Section: т а б л и ц аunclassified

Regularities in Diseases of the Musculoskeletal System Developing in Schoolchildren Under Complex Exposure to Environmental Factors and Factors Related to Lifestyle

Valina¹,

Shtina²,

Maklakova³

et al. 2021

Health Risk Analysis

0

View full text Add to dashboard Cite

The present research is vital due to diseases of the musculoskeletal system being widely spread and having great social significance as well as a variety of etiological factors that cause this pathology among schoolchildren. Overall, 339 school- children were examined; they attended secondary schools located on territories with different sanitary-hygienic conditions regarding ambient air. Hygienic, clinical-laboratory and instrumental procedures as well as mathematical data processing were applied to fulfill the research tasks. Average daily consumption of food products was estimated as per “Dairies of a weekly schoolchildren’s ration”; specific factors related to lifestyle were estimated via questioning performed with a specifi- cally designed authors’ questionnaire. Children who attended a secondary school in a city where metallic construction mate- rials were manufactured had manganese concentrations in their blood that were by 8–9 % higher than among their counter- parts from the reference group; lead concentrations in their blood were by 1.9–2.2 times higher than in the reference group and by up to 1.7 times higher than background levels. Priority factors that produce such negative effects on health as dis- eases of the musculoskeletal system include the following: school subjects with the same complexity do not interchange with simpler ones in schedules; breaks between classes do not conform to hygienic regulations; food rations are imbalanced as per milk products and eggs; physical training and doing sports are irregular; homework takes longer period of times than before. Average ionized calcium contents in blood of children from the test group were by 9.0–14.0 % lower and hydrocorti- sone contents were by 1.3–1.5 times higher than in the reference group (р=0.0001–0.01). Lower mineral density of bone tissues was by 1.6 times more frequent among children from the test group (р=0.04). Diseases of the musculoskeletal system were 4.6–15 times more probable and scoliosis was 8–11 times more probable due to persistent exposure to manganese and lead, violated hygienic principles of education process organization and food rations, and low physical activity of school- children. Changes in bone metabolism, activation of a stress-releasing system, and a decrease in bone mass are basic etiopa- thogenetic regularities in developing chronic pathology of the musculoskeletal system among schoolchildren associated with exposure to specific environmental factors and factors related to lifestyle.

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“…Manganese (Mn) is an essential mineral element that is required in minute quantity by humans. However, high levels of manganese can be very detrimental to human health as it has been associated with lower performance in verbal memory, hyper activity behaviors (de Carvalho et al,2018), hormonal imbalance in children (dos Santos et al, 2019), abnormality of hormones secretion and decrease of sperm motility in adult males (Yang et al, 2018).…”

Section: Mineral Element Analysismentioning

confidence: 99%

Quantitative determination of water soluble vitamins, minerals and proximate compositions of three varieties of beans in Bauchi State Nigeria

Mohammed¹,

Matinja²,

Tijjani³

et al. 2019

Glo Jnl Pure Appl Sci

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The quantitative determination of water soluble vitamins, minerals and proximate compositions of three varieties of beans in Bauchi State, Nigeria, was carried out in this study. Three varieties of beans which includes one of the most commonly consumed species of cowpea (Vigna unguiculata) locally called Kanannade, the least consumed (most rare) specie of cowpea (Vigna unguiculata) locally called gayan-gayan and soybean (Glycine max) locally called waken soya found in Bauchi State, Nigeria were analysed. Results for the determination of the proximate composition shows that soybean (Glycine max) among three different samples had the highest protein content (34.21 %), ash content (3.11 %), Crude fat (25.30 %). While Cowpea (kanannade) has the highest Carbohydrate content (58.04 %) and Cowpea (gayan-gayan) has the highest Moisture contents (12.43 %) respectively. Soya bean has the highest contents of vitamin (B1, B3, and B6) for the three water soluble vitamins analysed although the values obtained were less than the recommended dietary allowance recommended by the World Health Organization (WHO). In the Mineral composition of the two species of cowpea beans (Vigna unguiculata), and soybean analysed, soybean had the highest content of most of the mineral elements. The concentration of potassium was found to be very much higher than all the other mineral elements that were determined in all the samples. The results from this analysis shows that the three varieties of beans analyzed were found to be rich in minerals and highly nutritious.Keywords: Vigna unguiculata, Glycine max, vitamins, minerals and proximate composition

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Manganese exposure and association with hormone imbalance in children living near a ferro-manganese alloy plant

Cited by 17 publications

References 44 publications

Regularities in Diseases of the Musculoskeletal System Developing in Schoolchildren Under Complex Exposure to Environmental Factors and Factors Related to Lifestyle

Regularities in Diseases of the Musculoskeletal System Developing in Schoolchildren Under Complex Exposure to Environmental Factors and Factors Related to Lifestyle

Regularities in Diseases of the Musculoskeletal System Developing in Schoolchildren Under Complex Exposure to Environmental Factors and Factors Related to Lifestyle

Quantitative determination of water soluble vitamins, minerals and proximate compositions of three varieties of beans in Bauchi State Nigeria

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