Results 31 to 40 of about 75,647 (379)

Correlation tests between relative light unit and colony forming unit for improving adenosine triphosphate bioluminescence analysis in bacterial consolidation treatments on palaeontological heritage

open access: yesLuminescence, Volume 37, Issue 12, Page 2129-2138, December 2022., 2022
Bacterial mineralization treatments can be effective, nontoxic, environmentally friendly, and chemically compatible with fossil heritage. However, accurate monitoring should be carried out to detect bacteria viability during and after treatments. Adenosine triphosphate (ATP) assay is proposed as a fast, affordable, portable, and easy‐to‐use system for ...
Silvia Marín‐Ortega   +2 more
wiley   +1 more source

New early Eocene tapiromorph perissodactyls from the Ghazij Formation of Pakistan, with implications for mammalian biochronology in Asia [PDF]

open access: yes, 2012
Early Eocene mammals from Indo-Pakistan have only recently come under study. Here we describe the first tapiromorph perissodactyls from the subcontinent. Gandheralophus minor n. gen. and n. sp. and G. robustus n. sp.
Bai B.   +37 more
core   +2 more sources

Clumpy Cold Dark Matter and Biological Extinctions [PDF]

open access: yesPhys.Lett. B368 (1996) 266-269, 1995
Cosmological models with cosmic string and texture seeded universes predict a present abundance of very dense clumps of Cold Dark Matter particles. Their crossing through the solar system would induce a non-negligible amount of radiation damage to all living tissue; the severity of such an episode is assessed. The estimated frequency of these crossings
arxiv   +1 more source

Macraucheniidae y Proterotheriidae (Mammalia, Litopterna) de Quebrada Fiera (Oligoceno tardío), Mendoza, Argentina [PDF]

open access: yes, 2019
In this contribution we present new specimens of Litopterna recovered during the last decade in Quebrada Fiera (Mendoza Province, Argentina), whose fossiliferous sediments, currently recognized as the base of Agua de la Piedra Formation, are assignable ...
Cerdeño Serrano, Maria Esperanza   +2 more
core   +1 more source

An Interactive Game Approach to Learning in Historical Geology and Paleontology [PDF]

open access: yes, 2001
This article describes an interactive game that can be used in conjunction with traditional laboratory work, group discussions, student presentations, and writing exercises.
Anne Gardulski, Robert Reuss
core   +1 more source

Unique bone microanatomy reveals ancestry of subterranean specializations in mammals

open access: yesEvolution Letters, Volume 6, Issue 6, Page 552-561, December 2022., 2022
Abstract Acquiring a subterranean lifestyle entails a substantial shift for many aspects of terrestrial vertebrates’ biology. Although this lifestyle is associated with multiple instances of convergent evolution, the relative success of some subterranean lineages largely remains unexplained.
Eli Amson   +6 more
wiley   +1 more source

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