Results 31 to 40 of about 126,197 (320)

Fern spore viability considered in relation to the duration of the Cretaceous-Paleogene (K-Pg) impact winter. A contribution to the discussion

open access: yesActa Palaeobotanica, 2019
The Cretaceous-Paleogene (K-Pg) boundary Chicxulub impact is supposed to have produced a nearly decade-long impact winter which resulted in a mass-extinction event among dicot angiosperms but which left pteridophytes comparatively unaffected.
KEITH BERRY
doaj   +1 more source

Bacteriocins: Novel Solutions to Age Old Spore-Related Problems?

open access: yesFrontiers in Microbiology, 2016
Bacteriocins are ribosomally synthesized antimicrobial peptides produced by bacteria, which have the ability to kill or inhibit other bacteria. Many bacteriocins are produced by food grade lactic acid bacteria (LAB).
Kevin eEgan   +9 more
doaj   +1 more source

The dynamic spore [PDF]

open access: yesProceedings of the National Academy of Sciences, 2003
Most bacteria can, at least to some degree, hunker down during periods of stress and wait for good times to return. No cells, however, do this as effectively as those Bacilli and Clostridia that form spores. Dormant cells produced by these bacteria can survive most environmental challenges found on earth and even a few in outer space and can remain ...
openaire   +3 more sources

Alveolar Macrophages Treated With Bacillus subtilis Spore Protect Mice Infected With Respiratory Syncytial Virus A2

open access: yesFrontiers in Microbiology, 2019
Respiratory syncytial virus (RSV) is a major pathogen that infects lower respiratory tract and causes a common respiratory disease. Despite serious pathological consequences with this virus, effective treatments for controlling RSV infection remain ...
Ji Eun Hong   +15 more
doaj   +1 more source

c-di-GMP Inhibits Early Sporulation in Clostridioides difficile

open access: yesmSphere, 2021
The formation of dormant spores is essential for the anaerobic pathogen Clostridioides difficile to survive outside the host gastrointestinal tract. The regulatory pathways and environmental signals that initiate C.
Adrianne N. Edwards   +4 more
doaj   +1 more source

Distributions of Silica and Biopolymer Structural Components in the Spore Elater of Equisetum arvense, an Ancient Silicifying Plant

open access: yesFrontiers in Plant Science, 2019
Equisetum species are primitive vascular plants that benefit from the biogenesis of silica bio-organic inclusions in their tissues and participate in the annual biosilica turnover in local eco-systems.
Victor V. Volkov   +3 more
doaj   +1 more source

Extreme Compressed Sensing of Poisson Rates from Multiple Measurements [PDF]

open access: yes, 2021
Compressed sensing (CS) is a signal processing technique that enables the efficient recovery of a sparse high-dimensional signal from low-dimensional measurements. In the multiple measurement vector (MMV) framework, a set of signals with the same support must be recovered from their corresponding measurements.
arxiv   +1 more source

Spore Germination

open access: yesMicrobiology Spectrum, 2015
ABSTRACT Despite being resistant to a variety of environmental insults, the bacterial endospore can sense the presence of small molecules and respond by germinating, losing the specialized structures of the dormant spore, and resuming active metabolism, before outgrowing into vegetative cells.
Anne, Moir, Gareth, Cooper
openaire   +2 more sources

Mobility of core water in Bacillus subtilis spores by $^2$H NMR [PDF]

open access: yesBiophys. J. 105, 2016--2023 (2013), 2013
Bacterial spores in a metabolically dormant state can survive long periods without nutrients under extreme environmental conditions. The molecular basis of spore dormancy is not well understood, but the distribution and physical state of water within the spore is thought to play an important role.
arxiv   +1 more source

Conservation of the “Outside-in” Germination Pathway in Paraclostridium bifermentans

open access: yesFrontiers in Microbiology, 2018
Clostridium difficile spore germination is initiated in response to certain bile acids and amino acids (e.g., glycine). Though the amino acid-recognizing germinant receptor is unknown, the bile acid germinant receptor is the germination-specific ...
Disha Bhattacharjee, Joseph A. Sorg
doaj   +1 more source

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