Results 31 to 40 of about 182,984 (292)

An Exploratory Study of Telomere Length in the Deep-Sea Shark, Etmopterus granulosus

Frontiers in Marine Science, 2021
The history of elasmobranch ageing highlights the difficulty of age estimation in animals lacking ossified structures. Ageing techniques are numerous, yet all are limited by difficulties of validation and verification and inherent subjectivity.
Melissa C. Nehmens, Rebecca M. Varney, Alexis M. Janosik, David A. Ebert, David A. Ebert, David A. Ebert   +5 more
doaj   +1 more source

The Bakken Model: Deposition of Organic-Rich Mudstones and Petroleum Source Rocks as Shallow-Marine Facies Through the Phanerozoic

Journal of Marine Science and Engineering
Many organic-rich marine mudstones, which are key hydrocarbon sources, were deposited on continent margins in mid-water oxygen-minimum zones (OMZs) that expanded and intensified during oceanic anoxic events (OAEs).
Ed Landing
doaj   +1 more source

Forage Species Swarm in Response to Coastal Upwelling

Geophysical Research Letters, 2019
We observed the distribution and identity of forage species to infer behavioral changes in response to intraseasonal variation in the coastal upwelling ecosystem of Monterey Bay, California.
Kelly. J. Benoit‐Bird, Chad. M. Waluk, John P. Ryan   +2 more
doaj   +1 more source

High‐frequency and long‐term observations of eDNA from imperiled salmonids in a coastal stream: Temporal dynamics, relationships with environmental factors, and comparisons with conventional observations

Environmental DNA, 2022
A greater understanding of eDNA behavior in the environment is needed before it can be employed for ecosystem monitoring applications. The objectives of this study were to use autonomous sampling to conduct long‐term, high‐frequency monitoring of the ...
Ryan T. Searcy, Alexandria B. Boehm, Chloe Weinstock, Christina M. Preston, Scott Jensen, Brent Roman, James M. Birch, Christopher A. Scholin, Kyle S. Van Houtan, Joseph D. Kiernan, Kevan M. Yamahara   +10 more
doaj   +1 more source

Effect of heat and surface treatment on mechanical properties of 300M steel for civil main landing gear fuse-pin

Hangkong gongcheng jinzhan
The control of accuracy breakaway load for emergency fuse-pin of civil aircraft main landing gear is crucial for mechanical design of fuse-pin. To propose the requirements for heat and surface treatment process of fusepin and explore the mechanical ...
FU Liang, LI Tiannan, TAN Zihao, HUANG Shaofan, XIAO Xijun, FENG Kangtun, MENG Qinghe   +6 more
doaj   +1 more source

Seasonal and Geographical Transitions in Eukaryotic Phytoplankton Community Structure in the Atlantic and Pacific Oceans

Frontiers in Microbiology, 2020
Much is known about how broad eukaryotic phytoplankton groups vary according to nutrient availability in marine ecosystems. However, genus- and species-level dynamics are generally unknown, although important given that adaptation and acclimation ...
Chang Jae Choi, Chang Jae Choi, Valeria Jimenez, David M. Needham, David M. Needham, Camille Poirier, Camille Poirier, Charles Bachy, Charles Bachy, Harriet Alexander, Harriet Alexander, Susanne Wilken, Susanne Wilken, Francisco P. Chavez, Sebastian Sudek, Stephen J. Giovannoni, Alexandra Z. Worden, Alexandra Z. Worden   +17 more
doaj   +1 more source

Identification of a Shiga toxin A‐derived peptide internalized into Gb3 receptor‐bearing cells via interaction with the Shiga toxin B subunit

FEBS Letters, EarlyView.
The process of internalization of the Shiga toxin A subunit via formation of a complex with the Shiga toxin B subunit, which specifically binds to the Gb3 receptor. The peptide is designed to act as a carrier of drugs into cancer cells. Here, we explored the potential of peptides derived from the catalytic A subunit of Shiga toxin (STxA) to be drug ...
Giulia Opassi, João C. Encarnação, Valeria Napolitano, Grzegorz Dubin, Grzegorz Popowicz, Karl Andersson, U. Helena Danielson   +6 more
wiley   +1 more source

Targeted Sampling by Autonomous Underwater Vehicles

Frontiers in Marine Science, 2019
In the vast ocean, many ecologically important phenomena are temporally episodic, localized in space, and move according to local currents. To effectively study these complex and evolving phenomena, methods that enable autonomous platforms to detect and ...
Yanwu Zhang, John P. Ryan, Brian Kieft, Brett W. Hobson, Robert S. McEwen, Michael A. Godin, Julio B. Harvey, Benedetto Barone, James G. Bellingham, James M. Birch, Christopher A. Scholin, Francisco P. Chavez   +11 more
doaj   +1 more source

Biomechanical Parameters that May Influence Lower Limb Injury during Landing in Taekwondo

Medicina, 2021
Background and Objectives: The jumping kick of Taekwondo was a unilateral exercise that repeatedly moves in one direction. The exercise was exposed to the risk of injury due to the heavy ground reaction force and load in the landing. The first purpose of
Sihyun Ryu, Taek-kyun Lee
doaj   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source