Results 31 to 40 of about 339,788 (295)

Mechanism of Hydrogen Sulfide Generation and Prevention Strategies in Oil and Gas Fields: A Case Study of the Sickle Bay Operation Area

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To address the persistent exceedance of hydrogen sulfide (H2S) concentrations and the limited effectiveness of existing treatments in the Sickle Bay oil production area, this study deeply analyzes the mechanism of H2S generation in the Sickle Bay oil production area and proposes targeted prevention and control strategies. The results show that
Bo Lei   +7 more
wiley   +1 more source

Why and How are Caves “Organized”: Does the Past Offer a Key to the Present

open access: yesActa Carsologica, 2016
Prenekatere jame v karbonatnih sekvencah (in morda tudi drugod) izkazujejo opazno prostorsko organizacijo, pri čemer je poudarjeno kopičenje rovov v prostoru (drugega nad drugim).
David J. Lowe
doaj   +1 more source

H2S Reactions with Limestone and Calcined Limestone.

open access: yesJOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1995
Sulfur capture reactions of CaCO3-H2S and CaO-H2S have been investigated under various gaseous mixtures conditions using limestone and calcined limestone of 1 mm diameter in a thermogravimetric analyzer.Sulfidation of limestone (CaCO3-H2S) had a very low initial reaction rate and final conversion than the sulfidation of calcined limestone (CaO-H2S) due
Shi-Ying Lin   +4 more
openaire   +2 more sources

Early Pliocene Varanus (Squamata, Varanidae) remains from Megalo Emvolon, Thessaloniki, Greece

open access: yesThe Anatomical Record, EarlyView.
The article describes new cranial and postcranial varanid material from Megalo Emvolon Lower Pliocene vertebrate fossil site near Thessaloniki. The fossils, likely representing a single individual, are referred to Varanus cf. marathonensis. Abstract This study describes new fossil varanid material from a recently discovered fossil spot (MVL site) at ...
Chara Drakopoulou   +3 more
wiley   +1 more source

Relative egg extraction efficiencies of manual and automated fecal egg count methods in equines

open access: yesHelminthologia
The World Association for the Advancement of Veterinary Parasitology recently released new recommendations for the design of fecal egg count (FEC) reduction tests for livestock.
Britton L., Ripley B., Slusarewicz P.
doaj   +1 more source

Tectonic Inception in Caledonide Marbles

open access: yesActa Carsologica, 2006
A fundamental difference between caves in sedimentary limestones and those formed in a repeatedly-glaciated 40000 km2 region in central Scandinavia that contains over 1000 individual marble outcrops and has nearly 1000 recorded karst caves is the ...
Trevor Faulkner
doaj   +1 more source

Assessment limestone of Ghar Formation in Al-Busaiyah Area in southern Iraq as Raw Materials for the Manufacture of ordinary Portland cement (OPC)

open access: yesTikrit Journal of Pure Science, 2022
Six samples of limestone rocks were selected for the Early Miocene Ghar Formation in the Busayyah area south of Nasiriyah city in the southern desert of Iraq, and one sample of clay deposits of the Quaternary age was selected for the purpose of ...
Khalid M. Ahmed   +2 more
doaj   +1 more source

Fish assemblages associated with natural and anthropogenically-modified habitats in a marine embayment: Comparison of baited videos and opera-house traps [PDF]

open access: yes, 2013
Marine embayments and estuaries play an important role in the ecology and life history of many fish species. Cockburn Sound is one of a relative paucity of marine embayments on the west coast of Australia.
Coutts, T.B.   +4 more
core   +3 more sources

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

open access: yesThe Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

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