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    Wyświetlanie 1-5 z 5
    Tytuł:
    Effect of sewage sludge digestion on the mobility of heavy metals on the example of the wastewater treatment plant in Sitkówka-Nowiny
    Wpływ fermentacji osadów ściekowych na mobilność metali ciężkich w oczyszczalni ścieków w miejscowości Sitkówka-Nowiny
    Autorzy:
    Bąk, Ł.
    Gawdzik, J.
    Muszyńska, J.
    Bryk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/402016.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
    Tematy:
    heavy metals
    sewage sludge
    metals speciation
    metal redistribution
    index IR
    metale ciężkie
    osady ściekowe
    specjacja metali
    redystrybucja metali
    indeks IR
    Opis:
    In sewage sludge, heavy metals can be dissolved, precipitated, co-precipitated with metal oxides, adsorbed or associated on particles of biological residue. Heavy metals come as oxides, hydroxides, sulphides, sulphates, phosphates, silicates, organic connections in the form of humic complexes, and compounds with complex sugars. Sequential extraction procedures based on Tessier et al. are widely used for examining sewage sludge. The method makes it possible to extract the following fractions that are operationally defined: exchangeable, bound to carbonates, reducible, oxidisable (bound to organic matter) and residual. For the investigations, communal sewage sludge was collected from mechanical-biological sewage treatment plant located in Sitkówka-Nowiny; the Świętokrzyskie Province, Poland. Heavy metal content [ppm] in the sewage sludge was collected before and after digestion process. After the digestion process, for a majority of metals, the content of reducible form is clearly decreased and the concentration of organic and residual fractions is increased. As a result of redistribution, copper, zinc and nickel mobility in the sludge decreased, and the strength of bond, measured with index IR increased for all metals.
    Źródło:
    Structure and Environment; 2016, 8, 3; 189-196
    2081-1500
    Pojawia się w:
    Structure and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Near IR Refractive Index for GaInN Heavily Doped with Silicon
    Autorzy:
    Cywiński, G.
    Kudrawiec, R.
    Rzodkiewicz, W.
    Kryśko, M.
    Litwin-Staszewska, E.
    Misiewicz, J.
    Skierbiszewski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791356.pdf
    Data publikacji:
    2009-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uj
    78.66.Fd
    81.15.Hi
    68.55.-a
    78.20.-e
    Opis:
    The authors report on growth and results of infrared measurements of GaInN heavily doped with silicon. The lattice matched to GaN epitaxial layer of $Ga_{0.998}In_{0.002}N:Si$ has been grown in plasma assisted molecular beam epitaxy in the metal rich conditions. The room temperature Hall concentration and mobility of electrons are 2× $10^{20} cm^{-3}$ and 67 $cm^{2}$/(Vs), respectively. The refractive index has been determined by variable angle spectroscopic ellipsometry. The refractive index exhibited a significant reduction of its value (from 2.25 to 2 at 1.55 μm) at near IR range where are the main interests of potential applications for nitride based intersubband devices. Reported here values of refractive indices at 1.55 and 1.3 μm are appropriate for fabrication of cladding layers with the required contrast to GaN for intersubband devices. The observed drop of refractive index is attributed to the carrier-induced plasma edge effect, which has been directly observed in reflectance spectrum.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 5; 936-938
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of triglyceride-glucose index and HOMA-IR as indicators of insulin resistance in obese women with subclinical hypothyroidism
    Autorzy:
    Onur Kirac, Cem
    Sirikci, Vehbi
    Avni Findikli, Huseyin
    Powiązania:
    https://bibliotekanauki.pl/articles/2216805.pdf
    Data publikacji:
    2022-12-30
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    HOMA-IR
    insulin resistance
    subclinical hypothyroidism
    triglyceride-glucose index
    Opis:
    Introduction and aim. Thyroid hormones play an important role in glucose metabolism as in many metabolic events. The aim of our study is to evaluate the relationship between subclinical hypothyroidism (SCH) and insulin resistance, especially in obese women. Material and methods. Newly diagnosed SCH patients with body mass index (BMI) ≥30 who applied to our outpatient clinic between March 2021 and October 2021, and euthyroid obese women who applied for routine control were included in the study. In this study, we used homeostasis model assessment of insulin resistance (HOMA-IR) and triglyceride glucose (TyG) indexes, which are noninvasive, simple and useful methods for evaluating insulin sensitivity. Results. The study included 78 female patients between the ages of 19 and 64. A correlational analysis was performed between thyroid stimulating hormone (TSH) and HOMA-IR, TyG, and BMI. The results showed that TSH levels were positively correlated with HOMA-IR (R=0.297, p=0.008), TyG (R=0.316, p=0.005) and BMI (R=0.307, p=0.006). This relationship was stronger for TyG compared to the other variables. As another finding, BMI was positively correlated with HOMA-IR (R=0.359, p=0.001) and TyG (R=0.404, p<0.001). This relationship was stronger for TyG than HOMA-IR. Conclusion. These results show that patients with SCH are at risk of developing diseases that accompany insulin resistance, such as metabolic syndrome and cardiovascular disorders. The most important finding of our study is that the TyG index gives more significant results than HOMA-IR, especially in obese women.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2022, 4; 412-416
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of calorie restriction on the anthropometric parameters, HOMA-IR index, and lipid profile of female office workers with overweight and obesity: a preliminary study
    Autorzy:
    Sadowska-Krępa, Ewa
    Gdańska, Agnieszka
    Přidalová, Miroslava
    Rozpara, Michał
    Grabara, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/2152975.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    insulin resistance
    lipid profile
    reduction diet
    snacking
    coronavirus pandemic
    low physical activity level
    Opis:
    Objectives This study evaluates the effect of a 3-month calorie restriction (CR) without snacking on the anthropometric parameters, Homeostatic Model Assesment of Insulin Resistance (HOMA-IR), and lipid profiles of female office workers with overweight or obesity, whose physical activity was limited during the COVID-19 pandemic lockdown. Material and Methods Forty-eight women aged 20–38 years (28.9±5.24) with low physical activity levels were divided into a non-snacking (NS) group (N = 21) and a snacking (S) group (N = 27) prior to the dietary intervention. Their daily energy intake during the intervention was lowered by 30% compared with the baseline level, and the proportion of polyunsaturated fatty acids and fiber in their diet was increased (to >30 g/day). The proportion of saturated fatty acids and simple carbohydrates was also reduced. The study participants were assessed at the baseline and post-intervention for anthropometric variables (body weight, body fat percentage BMI, waist circumference, hip circumference, waist-to-hip ratio) and the concentrations of insulin, total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C). Moreover, the values for HOMA-IR, the atherogenic index of plasma (AIP), and the ratios of TC/HDL-C, TG/HDL-C, and LDL-C/HDL-C were calculated. Results All anthropometric parameter values obtained post-intervention were lower than the baseline in both groups. The serum insulin concentration and HOMA-IR decreased respectively by an average of 6% and 25% in the NS group and 37% and 45% in the S group. The lipid profiles of all participants improved significantly, with the LDL-C concentration showing a more promising trend in the S group (decrease by 27%) than in the NS group (17%). Conclusions The study showed that CR improved the anthropometric parameters, HOMA-IR index, and lipid profiles of all participants.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2022, 35, 6; 693-706
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czynniki wpływające na ocenę wskaźnika sztywności (IR) z badań in situ
    Factors influencing evaluation of rigidity index from in situ tests
    Autorzy:
    Mlynarek, Z.
    Wierzbicki, J.
    Stefaniak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/40872.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    grunty
    wskaznik sztywnosci
    badania in situ
    stopien plastycznosci
    wspolczynnik prekonsolidacji
    poczatkowy modul scinania
    sonda SDMT
    sondowanie SCPTU
    ground
    rigidity index
    in situ research
    plasticity degree
    preconsolidation coefficient
    initial shear modulus
    SDMT probe
    SCPTU sounding
    Źródło:
    Acta Scientiarum Polonorum. Architectura; 2018, 17, 3
    1644-0633
    Pojawia się w:
    Acta Scientiarum Polonorum. Architectura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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