https://researchdata.se/en/catalogue Search results en Adding alumina to the conventional soda lime silicate glass composition improves many properties, however, also increases the viscosity. Alumina doping of soda lime silicate glasses is investigated and its implications to high temperature viscosity as SiO2 is replaced by Al2O3. Fri, 10 Sep 2021 15:39:42 GMT https://researchdata.se/en/catalogue/dataset/2021-239-1 https://researchdata.se/en/catalogue/dataset/2021-239-1 RISE Research Institutes of Sweden Stefan Karlsson Titanium oxide has been added to the conventional soda lime silicate composition that is the most used glass in different applications. Surface mechanical properties through indentation using both nano- and micro-indenter has been studied both before and after chemical strengthening of the different glass samples. Fri, 14 Jan 2022 18:24:21 GMT https://researchdata.se/en/catalogue/dataset/2021-332-1 https://researchdata.se/en/catalogue/dataset/2021-332-1 RISE Research Institutes of Sweden Stefan Karlsson As TiO2 is replacing SiO2 it has a slight suppressing effect on the viscosity until the limit when Na2O/TiO2 ratio is less than 2, indicating a transformation of the structure of TiO2, a remarkable increase in the fragility and viscosity is observed for the calculated low temperature region. The change is not as evident for the high‐temperature region. CaO replaced by TiO2 gives almost no effect on the viscosity, however, as it approaches Na2O/TiO2≈2 it tends to crystallize at temperatures of 1000‐1050 °C. Fri, 09 Jul 2021 08:49:09 GMT https://researchdata.se/en/catalogue/dataset/2021-211-1 https://researchdata.se/en/catalogue/dataset/2021-211-1 RISE Research Institutes of Sweden Stefan Karlsson Diffusion kinetics and structural properties of chemically strengthened titania-doped soda-lime silicate glasses were studied by depth-resolved X-ray photoelectron spectroscopy, Raman spectroscopy and spectrophotometry. Chemical strengthening (CS) is frequently used to strengthen thin glasses. CS of glass is based on ion exchange of larger ions from a molten salt into glass. Both the ion and counter ion are conventionally monovalent alkali ions. Diffusion kinetics and structural properties of chemically strengthened titania-doped (TiO2) soda-lime silicate (SLS) glasses were studied by depth-resolved X-ray photoelectron spectroscopy, Raman spectroscopy and spectrophotometry. The glasses were ion exchanged, whereby Na+ in the glass was replaced by K+ in a molten salt bath, at four different treatment temperatures between 350 and 500 °C. The following samples were prepared and analyzed by X-ray Photoelectron Spectroscopy (XPS): (1) SLS, (2) 4.7% TiO2, and (3) 9.9% TiO2. The ion exchange procedure was performed for 5 h at four different temperatures below Tg (350, 400, 450 and 500 °C). Before XPS measurements, the samples were wet-etched using hydrofluoric (HF) acid to produce samples with six different etching depths. The Raman scattered light was detected in the backscattering configuration employing linear polarization and 2400 lines/mm grating, and a 100x objective lens. Depth profile spectra were collected at six different depths of 0, 10, 20, 30, 40, and 50 µm for each glass sample, employing 12 scans with a 10 s exposure time for each scan. Spectrophotometric measurements were conducted before and after K+/Na+ ion-exchange treatmeatment for 5 h at 500 °C, collected between 300 and 2500 nm. File List: XPS: XPS_4.7%TiO2_350degrees_acq1.txt XPS_4.7%TiO2_350degrees_acq2.txt XPS_4.7%TiO2_400degrees_acq1.txt XPS_4.7%TiO2_400degrees_acq2.txt XPS_4.7%TiO2_450degrees_acq1.txt XPS_4.7%TiO2_450degrees_acq2.txt XPS_4.7%TiO2_500degrees_acq1.txt XPS_4.7%TiO2_500degrees_acq2.txt XPS_4.7%TiO2_500degrees_acq3.txt XPS_4.7%TiO2_500degrees_acq4.txt XPS_9.9%TiO2_350degrees_acq1.txt XPS_9.9%TiO2_350degrees_acq2.txt XPS_9.9%TiO2_400degrees_acq1.txt XPS_9.9%TiO2_450degrees_acq1.txt XPS_9.9%TiO2_450degrees_acq2.txt XPS_9.9%TiO2_450degrees_acq3.txt XPS_9.9%TiO2_500degrees_acq1.txt XPS_9.9%TiO2_500degrees_acq2.txt XPS_9.9%TiO2_500degrees_acq3.txt Variable 1: KE_Ti 2p 8, Description: Kinetic Energy, Unit: eV Variable 2: BE_Ti 2p 8, Description: Binding Energy, Unit: eV Variable 3: CPS_Ti 2p 8, Description: Ti XPS specta, Unit: Counts per s Variable 4: Ti 2p_1_Ti_2p 8, Description: Ti4+ 2p3/2 deconvolution, Unit: Counts per s Variable 5: Ti 2p_2_Ti 2p 8, Description: Ti4+ 2p1/2 deconvolution, Unit: Counts per s Variable 6: Ti 2p_3_Ti 2p 8, Description: Ti3+ 2p1/2 deconvolution, Unit: Counts per s Variable 7: Ti 2p_4_Ti 2p 8, Description: Ti3+ 2p3/2 deconvolution, Unit: Counts per s Variable 8: Background_Ti 2p 8, Description: Background spectra, Unit: Counts per s Variable 9: Envelope_Ti 2p 8, Description: Sum of the deconvolutions and background, Unit: Counts per s Variable 10: Normalised_Residual_Ti 2p 8, Description: Normalised residual spectra, Unit: Counts per s Variable 11: Residual_Ti 2p 8, Description: Residual spectra, Unit: Counts per s Raman spectroscopy: Raman_SLS_untreated_depth1.txt Raman_SLS_500deg_depth6.txt Raman_SLS_500deg_depth5.txt Raman_SLS_500deg_depth4.txt Raman_SLS_500deg_depth3.txt Raman_SLS_500deg_depth2.txt Raman_SLS_500deg_depth1.txt Raman_SLS_450deg_depth1.txt Raman_SLS_400deg_depth1.txt Raman_SLS_350deg_depth1.txt Raman_4.7%TiO2_untreated_depth1.txt Raman_4.7%TiO2_500deg_depth6.txt Raman_4.7%TiO2_500deg_depth5.txt Raman_4.7%TiO2_500deg_depth4.txt Raman_4.7%TiO2_500deg_depth3.txt Raman_4.7%TiO2_500deg_depth2.txt Raman_4.7%TiO2_500deg_depth1.txt Raman_4.7%TiO2_450deg_depth1.txt Raman_4.7%TiO2_400deg_depth1.txt Raman_4.7%TiO2_350deg_depth1.txt Raman_9.9%TiO2_untreated_depth1.txt Raman_9.9%TiO2_500deg _depth6.txt Raman_9.9%TiO2_500deg _depth5.txt Raman_9.9%TiO2_500deg _depth4.txt Raman_9.9%TiO2_500deg _depth3.txt Raman_9.9%TiO2_500deg _depth2.txt Raman_9.9%TiO2_500deg _depth1.txt Raman_9.9%TiO2_450deg _depth1.txt Raman_9.9%TiO2_400deg _depth1.txt Raman_9.9%TiO2_350deg _depth1.txt Variable 1: #Wave, Description: Wavelength, Unit: cm-1 Variable 2: #Intensity, Description: Raman intensity, Unit: Counts per s Spectrophotometry: SLS_AbsorptionCoefficient_untreated.txt SLS_ AbsorptionCoefficient_treated.txt 4.7%TiO2_AbsorptionCoefficient_untreated.txt 4.7%TiO2_AAbsorptionCoefficient_treated.txt 9.9%TiO2_AbsorptionCoefficient_untreated.txt 9.9%TiO2_AbsorptionCoefficient_treated.txt Variable 1: Description: Wavelength, Unit: nm Variable 2: Description: Absorption coefficient, Unit: cm-1 Fri, 01 Apr 2022 06:11:31 GMT https://researchdata.se/en/catalogue/dataset/2022-4-1 https://researchdata.se/en/catalogue/dataset/2022-4-1 RISE Research Institutes of Sweden Felix Bengtsson Ilknur Bayrak Pehlivan Lars Österlund Stefan Karlsson Data are given for the complex relative permittivity for limestone (CaCO3) and quick lime (CaO) vs temperature in the range from room temperature to 1000C. Data are given for limestone gravel during calcination. Data values recalculated to bulk CaCO3 and CaO are also given. Permittivity data for a limestone block during calcination are given together with calculated data where values for Bulk CaCO3 and CaO were used. Mon, 09 Mar 2026 16:03:32 GMT https://researchdata.se/en/catalogue/dataset/2025-289 https://researchdata.se/en/catalogue/dataset/2025-289 University of Gävle Daniel Rönnow Chemical strengthening is being investigated with the purpose to get a better understanding for the complex mechanisms of the process and in the future create thinner and stronger glass for a sustainable and resource efficient society. We investigated the effect of alumina doping on thermal, mechanical, and structural properties of a conventional soda lime silicate glass before and after ion exchange strengthening. The techniques to measure properties were: - 23Na and 27Al Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) - Scattered light polariscope - Differential Thermal Analysis (DTA) - Nanoindentation - Microindentation More detailed information can be found in the documentation-readme file. Thu, 06 Oct 2022 07:16:40 GMT https://researchdata.se/en/catalogue/dataset/2021-177-1 https://researchdata.se/en/catalogue/dataset/2021-177-1 RISE Research Institutes of Sweden Stefan Karlsson Renny Mathew Sharafat Ali Mart Paemurru Johan Anton Baltzar Stevensson Mattias Edén The study presented in this database concerns plasters used for wall decorations in Pompeii. Earlier experiences in the field showed that plasters compositions change over time. The hypothesis for the study was that there is a connection between the typology and the relative chronology in which the plasters appear on the walls, and that these factors are related not only in single houses or quarters but over the site. The variations were assumed to be related to technology, craftsmanship and fashion. Focus has been set on materials and styles. The database has three sections: Houses, Samples and Types. The types are sorted according to the system of types which is 0 (Zero), which contains the earliest plasters identified, the chronologically namned A-H and the additional X, a group that contains other kinds of materials, such as cocciopesto, modern restoration materials, or waterproof plaster, just to mention some. Purpose: The main objective of this project is to study lime plasters used for wall decoration and, if possible, to find a clear relation between typology and stratigraphy. Fri, 21 Dec 2012 00:00:00 GMT https://researchdata.se/en/catalogue/dataset/snd0920-1 https://researchdata.se/en/catalogue/dataset/snd0920-1 Swedish Institute in Rome Agneta Freccero The SLU long-term agricultural field experiments are a nationwide research infrastructure consisting of experiments in hydrological management, tillage, landscape ecology, plant nutrition, weed biology and control, cropping systems, and cropping systems in northern Sweden. They are used to study how crop rotations and cultivation measures in agriculture affect soil properties and crop yields in the long term, and the effect of weather and climate on the efficacy of these treatments. The experimental sites and the data collected in the long-term experiments are a valuable resource for research, teaching and consulting. The experiments are open for those who want to use data already collected or who want to do their own sampling. All long term experiments are funded by the NJ faculty and administered by an academic department, with the activities coordinated by a committee. Twenty four long-term field experiments in plant nutrition and soil fertility are currently managed by the Department of Soil and Environment at the Swedish University of Agricultural Sciences. These experiments, starting as early as 1936 or as recently as 2010, are grouped into eight different experimental series that focus on themes such as agronomically-relevant factors including liming, long-term soil fertility, soil organic matter and soil biology. Plant and soil samples have been collected, measured for standard parameters, and archived since the start of the experiments, forming the basis of over 200 theses and papers across a broad range of disciplines. The frame experiment is located at the Ultuna Campus at the Swedish University of Agricultural Sciences and has been ongoing since 1956. The aim of the experiment is to study the effect of different combinations of organic matter and nitrogen fertilization on soil organic matter content, yield level and crop nutrient content. This dataset contains values ​​for nutrient content in crops, soil and organic matter, and yields between 1956 and 2023. The data is provided as a single tsv file (RAM56_data.tsv), with an additional seven tsv files providing context. Physical data collected by researchers since the beginning of the experiment, together with plant and soil samples collected from a subset of time points during the experiment, are stored at the Swedish University of Agricultural Sciences. Thu, 23 Jan 2025 12:27:44 GMT https://researchdata.se/en/catalogue/dataset/2024-468 https://researchdata.se/en/catalogue/dataset/2024-468 Swedish University of Agricultural Sciences Fire and herbivory are fundamental top-down processes, structuring grass-tree ratios in ecosystems across a diversity of climates. Both are plant consumers that can strongly control the recruitment of woody seedlings or saplings to taller height classes. Without such ‘consumer control’, many grass-dominated ecosystems would convert into woodlands or forests. While extensively studied in savannas, few have explored the effects of these disturbance regimes on woody recruitment under temperate conditions. We exposed saplings of the five most common European tree species to fire and herbivory in a full factorial experiment in a savanna-like wood-pasture on the Swedish west coast. After three years, we evaluated the effects of fire and herbivory on tree sapling survival and height increment. The tree species used, varying in traits and in expected response to fire and herbivory, were Scots pine Pinus sylvestris, Norway spruce Picea abies, European oak Quercus robur, Silver birch Betula pendula and Small-leaved lime Tilia cordata. Fire and herbivory, and their combination, had a negative effect on both survival and height increment but with large differences among species. Sapling survival was reduced to a similar extent for all species except Q. robur, which was not affected by fire. Both processes, and the combination, reduced height increment of B. pendula, while only herbivory reduced the height increment of Q. robur. P. sylvestris, P. abies and T. cordata had a similar height increment in all treatments. Overall, the combined effect of fire and herbivory was similar to the effect of herbivory alone, indicating no additional effect of fire when herbivores were present. Our experiment shows how fire and herbivory can cause a strong consumer control on the recruitment of European temperate trees on a wood-pasture, by reducing the recruitment of saplings to the next demographic stage. Responses to fire and herbivory differed from general predictions of species performance which highlights the need for further experiments addressing drivers of landscape openness and tree-grass interaction. The data set consists of one file with data on tree saplings suvival and height increment, and one file with explanations to the variables. Thu, 16 Sep 2021 15:27:01 GMT https://researchdata.se/en/catalogue/dataset/2021-193-1 https://researchdata.se/en/catalogue/dataset/2021-193-1 Swedish University of Agricultural Sciences Karin Amsten Joris P. G. M. Cromsigt Dries P. J. Kuijper Jenny M. Loberg Mats Niklasson The SLU long-term agricultural field experiments are a nationwide research infrastructure consisting of experiments in hydrological management, tillage, landscape ecology, plant nutrition, weed biology and control, cropping systems, and cropping systems in northern Sweden. They are used to study how crop rotations and cultivation measures in agriculture affect soil properties and crop yields in the long term, and the effect of weather and climate on the efficacy of these treatments. The experimental sites and the data collected in the long-term experiments are a valuable resource for research, teaching and consulting. The experiments are open for those who want to use data already collected or who want to do their own sampling. All long-term experiments are funded by the NJ faculty and administered by an academic department, with the activities coordinated by a committee.  Twenty-four long-term field experiments in plant nutrition and soil fertility are currently managed by the Department of Soil and Environment at the Swedish University of Agricultural Sciences. These experiments, starting as early as 1936 or as recently as 2010, are grouped into eight different experimental series that focus on themes such as agronomically relevant factors including liming, long-term soil fertility, soil organic matter and soil biology. Plant and soil samples have been collected, measured for standard parameters, and archived since the start of the experiments, forming the basis of over 200 theses and papers across a broad range of disciplines. The soil organic matter in a cereal-only cropping system experimental series (also called "the humic balance trials") R3-0020 was established at four locations between 1970 and 1980. These experiments were designed to examine the impact of continuous cereal cropping on soil organic matter content. The design also tested the effects of nitrogen fertilization and of removing versus leaving straw in the field. This experimental series is connected to R3-0021 (soil organic matter in a ley-only cropping system), which includes four experiments at the same locations as R3-0020. The data collection includes yield, crop and soil data from the four currently active experiments from the year 1971 to 2023. Yield and crop data has been collected every year, and soil data has been collected at regular intervals depending on time period and location. The data has been checked for obvious outliers or faulty values, but caution is advised since this collection spans many years and has been collected and compiled by different people during this period. Please contact soilnutrientcycling@slu.se if there are any questions regarding the data, or regarding the design and management of the long-term experiments. Links to metadata records in the GLTEN (Global Long-Term Agricultural Experiment Network) platform are provided under Relations. Tue, 20 Jan 2026 09:50:08 GMT https://researchdata.se/en/catalogue/dataset/2025-209 https://researchdata.se/en/catalogue/dataset/2025-209 Swedish University of Agricultural Sciences