Results 51 to 60 of about 18,367 (247)

Carbon isotope geochemistry of organic matter in volcanic paleosols constrains paleo‐environmental variations

Journal of Quaternary Science, EarlyView.
ABSTRACT The Fiorano quarry paleosol developed within the Colli Albani volcanic district (Italy) in the time interval bracketed by the deposition of the Pozzolanelle pyroclastic‐flow unit (365 ± 4 ka) and the emplacement of the Capo di Bove lava flow (277 ± 2 ka).
Eduardo Di Marcantonio, Luca Aldega, Luigi Dallai, Mario Gaeta, Fabrizio Marra   +4 more
wiley   +1 more source

Freshwater sensitivity of corrensite and chlorite/smectite in hydrocarbon reservoirs - an ESEM study

, 1994
An Environmental Scanning Electron Microscope (ESEM) has been used to investigate the freshwater sensitivity of secondary corrensite (regularly interstratified chlorite/smectite) and chlorite-rich chlorite/smectite in order to determine whether ...
Uwins, P. J. R., Mackinnon, Ian D. R., Baker, J. C.   +2 more
core   +1 more source

Corrosion of Potential Canister Materials During Oxic to Anoxic Transient in Compacted Bentonite

Materials and Corrosion, EarlyView.
A comprehensive analytical approach was applied to investigate material degradation phenomena of cast iron and copper as potential canister materials for the safe disposal of high‐level radioactive waste, as well as compacted bentonite exposed to artificial water relevant for disposal. ABSTRACT The long‐term performance of the engineered barrier system
Louisa Panjiyar, Martin Ende, Nicolas Finck, Christiane Stephan‐Scherb   +3 more
wiley   +1 more source

Smectite in the treatment of acute diarrea: a nationwide randomized controlled study of the Italian Society of Pediatric Gastroenterology and Hepatology (SIGEP) in collaboration with primary care pediatricans

, 2001
BACKGROUND: Childhood gastroenteritis is associated with considerable health costs. The natural clay dioctahedral smectite increases intestinal barrier function and is effective against infectious diarrhea in children in developing countries. The purpose
IACONO G, BRUZZESE, EUGENIA, CASTELLUCCI G, BISCEGLIA M, GRECO L. AND THE SIGEP STUDY GROUP FOR SMECTITE IN ACUTE DIARREA, MUSETTA A, GUARINO, ALFREDO, GOBIO CASALI L   +7 more
core   +1 more source

Integrated TEM, XRD and electron-microprobe investigation of mixed-layer chlorite smectite from the Point-Sal ophiolite, California

, 1991
Five basalt samples from the Point Sal ophiolite, California, were examined using HRTEM and AEM in order to compare observations with interpretations of XRD patterns and microprobe analyses.
I. D. R. MACKINNON, P. SCHIFFMAN, Bettison Varga, L., MACKINNON, I. D.R., Schiffman, P., Mackinnon, Ian D. R., BETTISON‐VARGA, L., L. BETTISON‐VARGA   +7 more
core   +1 more source

Sensitivity of Clay Suspension Rheological Properties to pH, Temperature, Salinity, and Smectite-Quartz Ratio [PDF]

, 2017
Understanding the rheological properties of clay suspensions is critical to assessing the behavior of sediment gravity flows such as debris flow or turbidity current.
Jun Kameda, Kameda, Jun, Morisaki, Tomonori, Tomonori Morisaki   +3 more
core   +1 more source

An Elasto–Plastic Hydro–Mechanical Model for Analyzing the Swelling Behavior of Heterogeneous Clay–Sulfate Rocks

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Swelling of clay‐sulfate rocks is a concern in geotechnical engineering that can damage infrastructure. In the historic town of Staufen in southwest Germany, geothermal drilling into a swellable anhydrite‐bearing clay formation resulted in water inflow and subsequent swelling, triggering ground heave and damage to more than 250 houses.
Reza Mahmoudi Kouhi, Reza Taherdangkoo, Thomas Nagel, Faramarz Doulati Ardejani, Christoph Butscher   +4 more
wiley   +1 more source

Fired products of Cr-smectite clays in nitrogen [PDF]

, 2004
The products of Cr-smectite clays heated to 1350 ° C in nitrogen were evaluated by X-ray diffraction and chemical analysis. Cr-smectite clays were prepared at room temperature by contact between smectite clays and Cr species contained in OH-Cr solutions.
Volzone, C., Cesio, A. M., Volzone, Cristina, Cesio,A. M., Volzone,C.   +4 more
core   +1 more source

Local structure determination of Zn-smectite

, 2023
An aluminum-free zinc-bearing smectite (Zn-smectite) was synthesized under hydrothermal conditions, together with its magnesium substituted products. Its layer charge calculated by cation exchange capacity (CEC) is 117.4 mmol/100 g.
Tianqi Zhang, Qingjin Zeng, Zeng, Qingjin, Li, Shangying, Hongping He, Sridhar Komarneni, Yang, Long, Komarneni, Sridhar, Chaogang Xing, Qi Tao, Seungyeol Lee, Tao, Qi, Xing, Chaogang, Lee, Seungyeol, Long Yang, Zhang, Tianqi, He, Hongping, Shangying Li, Guanglie Lv, Lv, Guanglie   +19 more
core   +1 more source

Lichen‐Derived Mineral Residue as a Renewable Particulate Filler in Polylactic Acid Biocomposites: Structure, Melt Rheology, Viscoelastic, and Flexural Behavior

Polymer Composites, EarlyView.
Lichen residue, a renewable mineral‐organic material, was melt compounded with polylactic acid and triacetin in a twin‐screw extruder. ABSTRACT A lichen‐derived natural material, known as “höllük” in southeastern Turkey, is introduced as a renewable filler for polylactic acid (PLA).
Huseyin Esen, Necip Elbir, Mine Begum Alanalp, Ali Durmus   +3 more
wiley   +1 more source