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40 results for “gypsum”
Cover and frequency of biological soil crust community types, moss species, vascular plants, and abiotic land surface features, on gypsum & non-gypsum soils from the Chihuahuan and Mojave Deserts in 2023
This dataset contains raw and calculated percent cover and frequency data for biological soil crust (hereafter biocrust) functional groups, vascular plant functional groups, and abiotic land surface features on and off gypsum soils in the northern Chihuahuan and eastern Mojave Deserts. Abundance data were obtained from 20 study sites total, 10 located on soils derived from gypsum parent material and 10 located on soils derived from non-gypsum parent materials. Sites were grouped into 10 pairs, in which every gypsum site was partnered with a non-gypsum site located in the same region. Apart from soil type, partnered-site characteristics (topography, climate, elevation, slope, aspect, and presence of biocrusts) were held relatively constant. At each site, cover and frequency assessments were made using the line-point intercept method (LPI) and frequency quadrats (1.0 m^2), respectively. Biocrust functional groups included the following crusts: lichen, moss, incipient algal, light algal, dark algal, unknown photosynthetic crust, and vagrant cyanobacteria. Vascular plant categories included: perennial forbs, perennial graminoids, annual forbs, annual graminoids, subshrub, shrub, Yucca, and cacti. Abiotic land surface features included: woody litter, herbaceous litter, bare soil, rock, bedrock, and animal feces. Moss crusts identified within cover and frequency analyses were sampled, and classified to species level via microscopy. The resulting percent cover and frequency data was used to understand differences in biocrust and moss species abundance and diversity on and off gypsum soils; furthermore, how biocrust and moss species abundance was associated with the measured environmental variables. Soil physical and chemical data from this study can be accessed at knb-lter-jrn.210616002. This study and dataset are complete.
Soil physical and chemical properties of gypsum & non-gypsum soils from the Chihuahuan and Mojave Deserts in 2023
This dataset contains data for soil physical and chemical properties of gypsum and non-gypsum soils in the northern Chihuahuan and eastern Mojave Deserts. Data were obtained from 20 study sites total, 10 located on soils derived from gypsum parent material and 10 located on soils derived from non-gypsum parent materials. Sites were grouped into 10 pairs, in which every gypsum site was partnered with a non-gypsum site located in the same region. Apart from soil type, partnered-site characteristics (topography, climate, elevation, slope, aspect, and presence of biocrusts) were held relatively constant. Site info and characteristics data can be accessed at knb-lter-jrn.210616001. Soil physical properties included: percent gravel, percent < 2mm fraction, soil aggregate stability, and soil compaction. Soil chemical properties were: percent gypsum content, pH, EC, and soil soluble concentrations of calcium, magnesium, potassium, sulfur, and phosphorus. The resulting soil data was used to understand physical and chemical differences between gypsum and non-gypsum soils and to examine how biocrust community types and moss species abundance and composition were associated with the measured soil variables. This study and dataset are complete.
3DPC of a gypsum slope in Finestrat, Alicante (Spain)
<p>3DPC of a gypsum slope in Finestrat, Alicante (Spain).</p> <p>Two different ground-based LiDARs were used during a 5-year time-span: (a) an Ilris-3D and a Ilris 3D long range were used for the first and the second field surveys, respectively, and (b) a Leica C10 laser scanner was used for the third and fourth field surveys.</p> <p> </p> <table> <thead> <tr> <th scope="col">Parameters</th> <th scope="col">2011 February</th> <th scope="col">2012 August</th> <th scope="col">2014 July </th> <th scope="col">2016 January</th> </tr> </thead> <tbody> <tr> <td>Relative time span (days) </td> <td> 0</td> <td>553 </td> <td>1256 </td> <td>1822</td> </tr> <tr> <td>LiDAR model </td> <td>Ilris 3D</td> <td>Ilris 3D (long range) </td> <td>Leica C10 </td> <td>Leica C10 </td> </tr> <tr> <td>Mean distance of scanning (m) </td> <td>276</td> <td>276</td> <td>120</td> <td>133</td> </tr> <tr> <td>Acquisition velocity (points/s)</td> <td> 2500 </td> <td>10,000 </td> <td> 50,000</td> <td>50,000</td> </tr> </tbody> </table> <p>The datasets were used for this paper:</p> <p>Tomás, R., Abellán, A., Cano, M. et al. A multidisciplinary approach for the investigation of a rock spreading on an urban slope. Landslides 15, 199–217 (2018). https://doi.org/10.1007/s10346-017-0865-0</p>
Dataset for publication "Acid leaching technology for post-consumer gypsum purification"
<p>This dataset contains underlying and extended data of publication entitled "Acid leaching technology for post-consumer gypsum purification". </p> <p>Data comprises: </p> <p>- Dataset description.txt (abbreviations and codes of samples presented in the publication)</p> <p>- Particle size analysis.zip (particle size distribution data files for the two acid leaching feedstocks in .txt format)</p> <p>- SEM.zip (scanning electron microscopy images of gypsum from refurbishment plasterboard waste before and after acid leaching in .jpg format)</p> <p>- TGA.zip (thermal gravimetric analysis raw data for gypsum from refurbishment and demolition plasterboard wastes before and after acid leaching in .xlsx format) </p> <p>- XRD.zip (X-ray diffraction data files for samples presented in the publication in .raw, .brml and .uxd formats)</p> <p>- XRF.zip (X-ray fluorescence data files for samples presented in the publication in .xlsx format)</p> <p>- Extended data.pdf (additional tables and figure supporting claims in the publication).</p>
Dataset for Nanoscale Growth Mechanisms of Gypsum: Implications for Environmental Control of Crystal Habits
<p>This dataset collected here has been used in the paper "Nanoscale Growth Mechanisms of Gypsum: Implications for Environmental Control of Crystal Habits".</p> <p>The files are in .dat format and each one corresponds to the images indicated in the file name.</p>
Text-fig. 2. Stratigraphic column of the Govone section with a detail of the sampled intervals on the right. CCS – Cassano Spinola Conglomerates; Gm and Gg – sedimentary cycles, respectively marl-dominated or gypsum-dominated; MES – Messinian Erosional Surface; MSC – Messinian Salinity Crisis; PLG – Primary Lower Gypsum; RLG – Resedimented Lower Gypsum. in Remains Of A Subtropical Humid Forest In A Messinian Evaporitebearing Succession At Govone, Northwestern Italy - Preliminary Results
Text-fig. 2. Stratigraphic column of the Govone section with a detail of the sampled intervals on the right. CCS – Cassano Spinola Conglomerates; Gm and Gg – sedimentary cycles, respectively marl-dominated or gypsum-dominated; MES – Messinian Erosional Surface; MSC – Messinian Salinity Crisis; PLG – Primary Lower Gypsum; RLG – Resedimented Lower Gypsum.
The effects of increased thermal insulation in timber-framed external walls with thin gypsum board as a wind barrier - Dataset
<p>This dataset includes measured data from the field measurement of four timber-framed exterior wall constructions. All the walls were equipped with gypsum board wind barrier having a minimal thermal resistance. Insulation thicknesses of 150 mm and 300 mm, demonstrating a moderate and a very effective levels of thermal insulation, were compared. Wooden cladding and brick veneer were compared as façade materials.</p> <p>Measurements were done in a test building of Tampere University, Tampere, Finland. The coordinates of the campus are 61°27' N, 23°52’ E. Ground height at test building site is approximately 135 m above sea level. The site is rather protected area, with the modest wind and driving rain load. </p> <p>The test was performed between 13 September 2020 and 30 November 2021. </p> <p> </p>
Photomicrographs of bedded halite and gypsum sand from the Bonneville Salt Flats and an evaporation pond
<p>Photomosaic images of thin sections and photomicrographs of evaporite features from the Bonneville Salt Flats. </p>
Gypsum panel of an archer, palace of Sargon II
Gypsum wall panel in relief: depicting an archer, facing right, with a bow and arrows, wearing a loin-cloth with fringe, clearly not an Assyrian. From a scene showing Sargon II's attacks on the town of Amqaruna (Biblical Ekron) in central Palestine, probably in 720BC. Height: 124 centimetres This panel dates to 710 BC - 705 BC and was excavated at Khorsabad, and found in Room 5 (Panel 2) of Sargon II's palace. Source: Objaverse 1.0 / Sketchfab
Gypsum panel from Nimrud, depicting a siege
A gypsum panel from Tiglath-pileser III's SW palace of Nimrud dating to 728 BC. This wall-panel, one of a series, shows two disconnected scenes. Above, Tiglath-pileser III's army is attacking a town, perhaps in Syria. Below, Assyrian soldiers carry away gods captured from a defeated enemy. The writing in the middle describes the resettlement of prisoners after the Assyrian campaign of 745 BC. From Nimrud, Central Palace, re-used in South-West Palace. Height: 272 centimetres Length: 254 centimetres ResearchSpace record: [WCO26597](http://collection.britishmuseum.org/id/object/WCO26597) Created from 121 photographs taken with a Sony A6000, processed in Agisoft Photoscan Pro. Source: Objaverse 1.0 / Sketchfab
Gypsum relief
A gypsum panel from Sennacherib's South West Palace, Room XIV (K) panels 4-6 Nineveh. Dating to 700 - 629 BC. Gypsum wall panel relief: these Assyrian soldiers leading horses to the left, from the same scene as wall panels 1851,0902.17 (BM. 124786) and 1851,0902.21 (BM. 124784), formed part of the train of the Assyrian king, who was probably represented in much the same way as in the Lachish sculptures. Note the decorated and fringed saddle-cloths. The relation of the hair, neck, and shoulder of the left arm, which is pulled backwards, is clumsily rendered. Height: 92.7 centimetres Width: 148 centimetres Created from 51 Sony A6000 photographs, Photoscan Pro, Meshlab. ResearchSpace record: [WCO26643](http://collection.britishmuseum.org/id/object/WCO26643) Source: Objaverse 1.0 / Sketchfab
Gypsum relief, Ashurbanipal's palace Nineveh
Gypsum wall panel relief: depicting a harpist and lyre player, one a woman wearing a fillet of great beads, the other a youth, wearing feather headdress, with a tame lion beneath palms and cypresses. This neo-Assyrian relief dates to 645BC - 635BC and was excavated in room E of the North Palace of Ashurbanipal. This is panel 5. Height: 168 centimetres Source: Objaverse 1.0 / Sketchfab
Gypsum panel, palace of Sargon II, Khorsabad
The figure is an attendant who takes the form of a protective spirit and is shown holding a bunch of twigs. Source: Objaverse 1.0 / Sketchfab
Gypsum wall panel relief, Nimrud
Gypsum wall panel relief: in the upper register, a line of Assyrian warriors moves ⇦. On the right, an Assyrian soldier wearing a mail-shirt over the tunic decorated with the fringed border hanging down between his knees, and, as it seems, a helmet, pulls at the branches of a low tree. In front of it are six warriors, three slingers and before them, a man with round shield and dagger, all similarly dressed, except that the tunic of the shield-bearer is richly ornamented with concentric squares. He follows a pair of warriors; the first, wearing a garment decorated with fringes and small discs put into squares, is an archer; the man partly hidden by him and wearing an ornamented tunic holds a dagger in his right hand. Dating to 728 BC, found in Tiglath-pileser III's Palace at Nimrud. Height: 272 centimetresLength: 239 centimetres Source: Objaverse 1.0 / Sketchfab
A fragment of gypsum panel
A fragment of a gypsum wall panel depicting men carrying a dead lion. Source: Objaverse 1.0 / Sketchfab
Gypsum wall panel relief: a horseman
Gypsum wall panel relief: a horseman, moving ⇨, is attacked by two mounted Assyrians. He has short straight hair ending in curls and his short curly beard shows two lines of straight hair near its end. He wears a fringed tunic held by a multiple girdle, low boots, and a helmet with earflaps and a plate-like crest. Dating to 728 BC, found in Tiglath-pileser III's Palace of Nimrud DimensionsHeight: 127 centimetres Width: 111 centimetres Source: Objaverse 1.0 / Sketchfab
Sevilleta site, station Five Points, study of plant cover of Phacelia integrifolia (gypsum phacelia) in units of percent on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Sevilleta (SEV) contains plant cover of Phacelia integrifolia (gypsum phacelia) measurements in percent units and were aggregated to a yearly timescale.
Data from: Phosphorus release from unamended and gypsum-or biochar-amended soils under simulated spring snowmelt and summer flooding conditions
<p>Prolonged flooding changes the oxidation–reduction status of soils, often enhancing phosphorus (P) release to overlying floodwater. We studied P release from unamended, gypsum-amended and biochar- amended soils under simulated snowmelt flooding (previously frozen, cold flooding at +4°C) and summer flooding (unfrozen, warm flooding at +22°C), using two soils, Fyala clay (FYL-Cl) and Neuenberg sandy loam (NBG-SL) from Manitoba, Canada. Amended and unamended soils were packed into vessels and flooded under cold and warm temperatures in the laboratory. Pore water and floodwater samples were taken weekly for 6 weeks after flooding (WAF) and thereafter biweekly for 10 WAF, and analyzed for dissolved reactive P (DRP), pH and cation concentrations. NBG-SL showed a significantly higher DRP concentration in pore water and floodwater despite its low Olsen P content. Redox potential (Eh) decreased slowly under cold compared to warm flooding; hence redox-induced P release was substantially lower under cold flooding. Gypsum amendment significantly decreased the floodwater DRP concentrations in NBG-SL by 38% and 35% under cold and warm flooding, respectively, but had no significant effect in FYL-Cl, which had low DRP concentrations (<1.2 mg L-1) throughout flooding period. Biochar amendment significantly increased floodwater DRP concentrations by 27 to 68% in FYL-Cl under cold and warm flooding, respectively, but had no significant effect in NBG-SL. The results indicate substantially less P release under cold, than under warm flooding. Gypsum was effective in reducing floodwater DRP concentrations only at high DRP concentrations; thus the effectiveness was greater under warm, than under cold flooding conditions.</p>
Supplementary material 1 from: Collins N, Lightfoot DC (2022) A new species of tree cricket (Orthoptera, Gryllidae, Oecanthinae) from Chihuahuan Desert gypsum dunes in the United States and a key to the nigricornis species group. Journal of Orthoptera Research 31(2): 181-189. https://doi.org/10.3897/jor.31.79036
Supplementary material 1 from: Collins N, Lightfoot DC (2022) A new species of tree cricket (Orthoptera, Gryllidae, Oecanthinae) from Chihuahuan Desert gypsum dunes in the United States and a key to the nigricornis species group. Journal of Orthoptera Research 31(2): 181-189. https://doi.org/10.3897/jor.31.79036
Supplementary material 8 from: Collins N, Lightfoot DC (2022) A new species of tree cricket (Orthoptera, Gryllidae, Oecanthinae) from Chihuahuan Desert gypsum dunes in the United States and a key to the nigricornis species group. Journal of Orthoptera Research 31(2): 181-189. https://doi.org/10.3897/jor.31.79036
Supplementary material 8 from: Collins N, Lightfoot DC (2022) A new species of tree cricket (Orthoptera, Gryllidae, Oecanthinae) from Chihuahuan Desert gypsum dunes in the United States and a key to the nigricornis species group. Journal of Orthoptera Research 31(2): 181-189. https://doi.org/10.3897/jor.31.79036
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