Results 51 to 60 of about 10,713 (180)

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

open access: yes, 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.   +2 more
core   +1 more source

Duodenal stricture and portal gas accumulation secondary to ulcerative, fibronecrotising duodenitis in a foal

open access: yesEquine Veterinary Education, EarlyView.
Summary Gastroduodenal ulcer disease with secondary stricture formation of the proximal duodenum and portal gas accumulation is described in a neonatal foal. Conventional diagnostics were performed to reach a diagnosis, including gastroscopy, ultrasonography and positive contrast radiography. In addition, a post‐mortem CT was acquired with the contrast
R. F. Dash   +3 more
wiley   +1 more source

Decoding the origins and sources of clay minerals in the Upper Cretaceous Tununk Shale of south‐central Utah: Implications for the pursuit of climate and burial histories

open access: yesThe Depositional Record, 2020
Clay minerals in fine‐grained marine sedimentary successions are most commonly considered to be detrital in origin and have been used extensively by geologists as indicators of palaeoclimate conditions in the hinterland.
Zhiyang Li, Juergen Schieber, David Bish
doaj   +1 more source

Long‐term outcomes of gastric bypass surgery in two Lusitano foals: Contemporary evidence for surgical decision‐making

open access: yesEquine Veterinary Education, EarlyView.
Summary Gastric outflow obstruction (GOO) occasionally requires surgical intervention in foals when medical management fails. Current literature lacks consensus on several surgical decisions, with most comprehensive reports dating back over a decade. Critical aspects—including jejunal loop orientation and necessity of jejunojejunostomy—remain debated ...
P. Fernández Hernández   +8 more
wiley   +1 more source

Smectite flocculation structure modified by AI13 macromolecules; as revealed by the Transmission X-ray Microscopy (TXM)

open access: yes, 2010
The aggregate structure which occurs in aqueous smectitic suspensions is responsible for poor water clarification, difficulties in sludge dewatering and the unusual rheological behaviour of smectite rich soils.
Song, Yen-Fang   +5 more
core   +1 more source

Local structure determination of Zn-smectite

open access: yes, 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   +19 more
core   +1 more source

Mineralogical Analysis for Cracking Mass of Soils From Middle of Iraq [PDF]

open access: yesAl-Qadisiyah Journal For Agriculture Sciences, 2016
Seven soils sites (Afak Vertic-Torrifluvent , Al-Diwaniyah Typic-Torrifluvent , Al-Taleea Typic-Torrifluvent , Babel Vertic-Torrifluvent , College of Agriculture Typic-Torrifluvent , Al-Wahda Vertic-Torrifluvent and Al-Raid project Typic-Torrifluvent ...
Raid. Sh . Jarallah, S. K.Essa
doaj   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

open access: yesJournal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi   +4 more
wiley   +1 more source

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

open access: yes, 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.   +2 more
core   +2 more sources

The Clay Minerals in the Soils of the Gypseous Belt of Barbastro, NE Spain

open access: yesLand
This article examines the clay mineralogy of twelve representative soils developed from gypsum-rich parent materials on several geomorphic positions. These soils were classified as Haploxerept, plus one profile as Humixerept and another as Xerorthent ...
Juan Herrero   +2 more
doaj   +1 more source

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