Results 111 to 120 of about 998,406 (356)

Precursor Mineral Phases of Forming Mollusk Shell Nacre: A Study of Hydrated Samples

open access: yesAdvanced Functional Materials, EarlyView.
Mineral, organic phase, and water are the essential components in mollusk shell nacre formation. Their interplay is not well understood, because the hydrated material is difficult to observe at high resolution, under close to native conditions. Forming nacre is studied using environmental and cryo‐electron microscopy and hydrated ACC phases, together ...
Anna Kozell   +4 more
wiley   +1 more source

Organic Geochemical Characteristic Of Crude Oils From Orange Graben, South Sumatra Basin

open access: yesJGEET: Journal of Geoscience, Engineering, Environment and Technology, 2016
Lemat Formation in the Orange Graben in the South Sumatra basin has been considered as syn-rift sediments consist of fluvio-lacustrine sediments, create source rock with fluvio-lacustrine characterize.
Muhammad Syaifuddin
doaj   +1 more source

Indonesian Rock-phosphate Effectivity for Maize Crop on Ultisols Soils [PDF]

open access: yes, 2012
Rock phosphate is a slow release phosphate source which can be directly used on acid soils. There are some rock phospahate deposits in Indonesia. Total phosphate and calcium content in rock phosphate vary between 8.79 – 31.88% P2O5, and 0.60 – 57.50% Ca.
Kasno, A. (Antonius)   +1 more
core  

Microplastics from Wearable Bioelectronic Devices: Sources, Risks, and Sustainable Solutions

open access: yesAdvanced Functional Materials, EarlyView.
Bioelectronic devices (e.g., e‐skins) heavily rely on polymers that at the end of their life cycle will generate microplastics. For research, a holistic approach to viewing the full impact of such devices cannot be overlooked. The potential for devices as sources for microplastics is raised, with mitigation strategies surrounding polysaccharide and ...
Conor S. Boland
wiley   +1 more source

Characteristics of Rock-Eval Analysis of Carbonates Source Rocks and of Petroleum Derived from Carbonate Source Rocks.

open access: yesJournal of the Japanese Association for Petroleum Technology, 1991
In this paper, as a series of studies concerning the carbonate source rocks, characteristics of Rock-Eval analysis and petroleum derived from carbonate source rocks are discussed.Many Tmax values of Rock Eval analyses of carbonate source rocks indicate early mature or immature stage, though those rocks generated reservoir petroleum.
openaire   +2 more sources

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

open access: yesAdvanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu   +14 more
wiley   +1 more source

IODP Expedition 383 Source rock analyzer (SRA)

open access: green, 2021
Gisela Winckler   +30 more
openalex   +1 more source

From Waste to Value: Conversion of Calcium Sulfate to Vaterite via Carbon Capture and Storage

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces a new concept for carbon management that relies on the carbonation of industrial gypsum waste and yields phase‐pure vaterite at ambient conditions without any additives. The obtained vaterite is further shown to be a reactive material that develops compressive strength in aqueous suspensions like conventional cements.
Carlos Pimentel   +4 more
wiley   +1 more source

Satellite and surface geophysical expression of anomalous crustal structure in Kentucky and Tennessee [PDF]

open access: yes
An equivalent layer magnetization model is discussed. Inversion of long wavelength satellite magnetic anomaly data indicates a very magnetic source region centered in south central Kentucky.
Mayhew, M. A.   +2 more
core   +1 more source

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