Results 51 to 60 of about 209,114 (345)

Automated collection of single species of microfossils using a deep learning–micromanipulator system

open access: yesProgress in Earth and Planetary Science, 2020
For geochemical analysis such as stable isotope ratio, radiocarbon dating and minor element analysis for a single species of microfossils, a large number of specimens, is required. Collecting specimens one by one under a microscope requires enormous time
Takuya Itaki   +5 more
doaj   +1 more source

Country Studies: A Team with No Coach? Problems of Composition, Methodology and Development

open access: yesКонтуры глобальных трансформаций: политика, экономика, право, 2022
The article raises and discusses six “provocative” questions about country studies in order to review, once more, its headings, facilities and, above all, its problems.
A. I. Treivish
doaj   +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  

87Sr/86Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

open access: yes, 2004
New calcite <sup>87</sup>Sr/<sup>86</sup>Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Ellam, R.M.   +3 more
core   +1 more source

A Biologically‐Architected Wear and Damage‐Resistant Nanoparticle Coating From the Radular Teeth of Cryptochiton stelleri

open access: yesAdvanced Functional Materials, EarlyView.
The ultrahard teeth of mollusks that feed on rocky substrates contain a wear‐resistant coating on their surfaces consisting of densely packed mesocrystalline magnetic nanoparticles within an organic matrix. These coatings display significant hardness and toughness through their highly controlled mesocrystalline architectures.
Taifeng Wang   +7 more
wiley   +1 more source

Well design as a factor contributing to loss of water from the Floridan Aquifer, eastern Clay County, Florida [PDF]

open access: yes, 1962
A number of wells penetrating the Floridan aquifer in eastern Clay County were found to be losing water to permeable zones above this aquifer. A differential in artesian pressure was observed in closely spaced wells of similar depth.
Foster, James B.
core  

Nature and timing of Late Mississippian to Mid-Pennsylvanian glacio-eustatic sea-level changes of the Pennine Basin, UK [PDF]

open access: yes, 2012
The Pennine Basin of northern England contains a comparatively complete Serpukhovian– Moscovian succession characterized by high-resolution ammonoid zonation and cyclic paralic sedimentation.
Condon, Daniel J., Waters, Colin N.
core   +2 more sources

A COMPARISON OF DIFF ERENT RINSING METHODS UPON SELECTIVE DISSOLUTION OF IRON (OXY)HYDROXIDES IN SOILS/SEDIMENTS

open access: yesRudarsko-geološko-naftni Zbornik, 2017
Iron (oxy)hydroxides play an important role in a variety of disciplines, among others, environmental and exploration geochemistry, mineralogy, geology and soil science.
Marija Čambala   +2 more
doaj   +1 more source

Genomics Insights Into High‐Latitude Adaptation of Tibetan Macaques

open access: yesAdvanced Science, EarlyView.
Tibetan macaques exhibit unique adaptations to cold, high‐latitude environments, including shortened tails and enhanced fat storage. Genomic analyses reveal a species‐specific TBX6 mutation linked to tail reduction and selection on lipid metabolism genes.
Rusong Zhang   +12 more
wiley   +1 more source

Interim report on the ground-water resources of Manatee County, Florida [PDF]

open access: yes, 1955
A large part of western Manatee County is devoted to the growing of winter vegetables and citrus fruits. As in most of peninsular Florida, rainfall in the county during the growing season is not sufficient for crop production and large quantites of ...
Anders, Robert B., Peek, Harry M.
core  

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