AREA AND VOLUME CHANGES OF THE LAKE ONEGO IN THE LATE GLACIAL TIME

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Silver-doped Calcium Phosphate bone cements with antibacterial properties

Calcium phosphate bone cements (CPCs) with antibacterial properties are demanded for clinical applications. In this study, we demonstrated the use of a relatively simple processing route based on preparation of silver-doped CPCs (CPCs-Ag) through the preparation of solid dispersed active powder phase. Real-time monitoring of structural transformations and kinetics of several CPCs-Ag formulations (Ag = 0 wt %, 0.6 wt % and 1.0 wt %) was performed by the Energy Dispersive X-ray Diffraction technique. The partial conversion of β-tricalcium phosphate (TCP) phase into the dicalcium phosphate dihydrate (DCPD) took place in all the investigated cement systems. In the pristine cement powders, Ag in its metallic form was found, whereas for CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt % cements, CaAg(PO₃)₃ was detected and Ag (met.) was no longer present. The CPC-Ag 0 wt % cement exhibited a compressive strength of 6.5 ± 1.0 MPa, whereas for the doped cements (CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt %) the reduced values of the compressive strength 4.0 ± 1.0 and 1.5 ± 1.0 MPa, respectively, were detected. Silver-ion release from CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt % cements, measured by the Atomic Emission Spectroscopy, corresponds to the average values of 25 µg/L and 43 µg/L, respectively, rising a plateau after 15 days. The results of the antibacterial test proved the inhibitory effect towards pathogenic Escherichia coli for both CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt % cements, better performances being observed for the cement with a higher Ag-content

Data for: New spectroscopic method for true color determination in natural water with high agreement with visual methods”

The program is dedicated to true water color (TWC) calculation by light absorption in visual range from 390 up to 830 nm. Calculation is based on mathematical model of color perception by standard observer using spectral data, contained in text files. It allows: 1 – To load standard solutions and samples spectra with spectrum conversion into absorption when required; 2 – To save and upload calculation of graduation curve and graduation data; 3 – To calculate true water color and export data to Microsoft (MS) Excel table; Surce code and data examples are also attached

Data for: New spectroscopic method for true color determination in natural water with high agreement with visual methods”

The program is dedicated to true water color (TWC) calculation by light absorption in visual range from 390 up to 830 nm. Calculation is based on mathematical model of color perception by standard observer using spectral data, contained in text files. It allows: 1 – To load standard solutions and samples spectra with spectrum conversion into absorption when required; 2 – To save and upload calculation of graduation curve and graduation data; 3 – To calculate true water color and export data to Microsoft (MS) Excel table; Surce code and data examples are also attached

AREA AND VOLUME CHANGES OF THE LAKE ONEGO IN THE LATE GLACIAL TIME

140-14

Lake Onego water chemical composition based on seasonal field surveys in 2019-2021

The Dataset contains the characteristics of the water chemical composition of Lake Onego (35 stations in different regions of the lake) including the lake outflow Svir' River and the estuarine area of the main tributaries of the lake (rivers Shuya, Vodla, Andoma, and Vytegra). The data were obtained in autumn 2019, spring and summer 2020, and in winter 2021. Detailed information is provided for each station of water sampling (station index, their geographic coordinates, sampling date, sampling depth, temperature, and water chemical composition). The concentration of Na+ and Cl- ions, content of organic matter (TOC, CODMn, CODCr, water color, BOD5), nutrients (PO4-P, TP, NH4-N, NO2-N, NO3-N, TN), Fe, Mn, heavy metals (Cu, Ni, Cr, Zn, Cd, Pb), total suspended solids (TSS), conductivity, and pH were measured in water samples. Analytical methods commonly accepted in hydrochemical practice were used to determine chemical parameters of the water. The hydrochemical data will enable society to understand the water quality of Lake Onego as it is the main source of freshwater. Therefore, this data can be used for comparative analysis of the hydrochemical characteristics of other large lakes.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Zinc-releasing calcium phosphate cements for bone substitute materials

The goal of the present study was to develop zinc-doped calcium phosphate bone cements (CPCs-Zn) for functionalized bone grafts applications. An aqueous co-precipitation process for synthesis of beta-tricalcium phosphate (beta-TCP)powder samples with Zn addition ranging from 0 wt% up to 1.2 wt% was proposed as an alternative approach to produce CPCs-Zn, instead of mechanical mixing of powders. Real-time monitoring of structural transformations and kinetics of CPCs-Zn (Zn = 0 wt%, 0.6 wt% and 1.2 wt%) was carried out by the Energy Dispersive X-Ray Diffraction technique. The microstructure development in CPCs-Zn was investigated by Scanning Electron Microscopy. Zn-ion release from CPC-Zn 0.6 wt% and CPC-Zn 1.2 wt% cements, measured by the Atomic Emission Spectroscopy, corresponded to the average values of 0.30 +/- 0.01 and 0.10 +/- 0.01 mu g/L, respectively. The results of antibacterial tests proved the inhibitory effect towards pathogenic Escherichia coli only for the CPC-Zn 0.6 wt% cement formulation. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved