Results 21 to 30 of about 1,241,953 (360)

Unveiling Aggregation‐Induced Singlet Fission in Push–Pull Diketopyrrolopyrrole Water Dispersed Nanoaggregates and Thin Films

open access: yesAdvanced Functional Materials, EarlyView.
Aggregates of diketopyrrolopyrrole dipolar and quadrupolar systems exhibit panchromatic absorption spectra extending in the entire visible range. Upon aggregation in water and in the solid state, their fluorescence is almost completely quenched and their singlet excited state lifetime is significantly shortened.
Roberto Cantoni   +10 more
wiley   +1 more source

Grands travaux d’aménagement du vallon de Marly

open access: yesBulletin du Centre de Recherche du Château de Versailles, 2006
The Marly valley is situated 8 kilometres to the north of Versailles. The soil is made up of Rupelian sands lying on clay and marl, with an overall variation in level of 70 metres.
Jean-David Vernhes
doaj   +1 more source

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

Multiple Twinning in Nacre and Aragonite

open access: yesAdvanced Functional Materials, EarlyView.
Electron backscatter diffraction map of a cluster of geologic aragonite, exhibiting single, double, and triple twins. The whole cluster is approximately 2 cm wide. Colors indicate crystal orientations, so that pixels where the a‐, b‐, and c‐axis is perpendicular to the image plane are green, red, and blue, respectively.
Connor A. Schmidt   +7 more
wiley   +1 more source

Catherine Raisin, a role-model professional geologist [PDF]

open access: yes, 2003
This is a PDF version of an article published in Geology Today© 2003. The definitive version is available at www.blackwell-synergy.com. The illustrations have been removed.This article discusses the life and career of British geologist Catherine Raisin ...
Burek, Cynthia V.
core  

From Grand Canyon to Yosemite: Lessons learned from the development and assessment of digital geoscience field trips for mobile smart devices [PDF]

open access: yes, 2020
How geoscience apps are enhancing students' understanding of the geology of places such as Grand Canyon and Yosemite national ...
Bursztyn, Natalie
core  

Demanding and Enforcing High Expectations in Freshman Courses [PDF]

open access: yes, 2004
This article describes the results of an experiment in which high school graduates were enrolled in two summer science courses with extremely high goals.
Abhijit Basu, Joan Middendorf
core   +1 more source

Insight into the Internal Structure of Biogenic, Synthetic and Geological Apatite by Electron Microscopy and X‐Ray Scattering

open access: yesAdvanced Functional Materials, EarlyView.
Apatite occurs in many forms in nature, e.g. in teeth and geological minerals. Internally, biological apatite contains nanocrystals that are also found in synthetically prepared calcium phosphate nanoparticles which are used in biomedicine, e.g. for gene and drug delivery and for bone regeneration. Abstract Calcium phosphate is the inorganic component (
Kathrin Kostka   +3 more
wiley   +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

Montana Bureau of Mines and Geology [PDF]

open access: yes
The Montana Bureau of Mines and Geology is the principal source of earth science information for the citizens of Montana. The bureau provides extensive advisory, technical, and informational services on geologic, mineral, energy, and water resources in ...

core   +2 more sources

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