Results 61 to 70 of about 519,930 (304)

A carbon budget for the Amundsen Sea Polynya, Antarctica: Estimating net community production and export in a highly productive polar ecosystem

Elementa: Science of the Anthropocene, 2016
Polynyas, or recurring areas of seasonally open water surrounded by sea ice, are foci for energy and material transfer between the atmosphere and the polar ocean.
PL Yager, RM Sherrell, SE Stammerjohn, HW Ducklow, OME Schofield, ED Ingall, SE Wilson, KE Lowry, CM Williams, L Riemann, S Bertilsson, A-C Alderkamp, J Dinasquet, R Logares, I Richert, RE Sipler, AJ Melara, L Mu, RG Newstead, AF Post, R Swalethorp, GL van Dijken   +21 more
doaj   +1 more source

Optical parametric generation in periodically poled KTiOPO4 via extended phase matching [PDF]

, 2007
We report an experimental demonstration of optical parametric generation in a periodically poled KTiOPO4 crystal based on the principle of mirrorless optical parametric oscillation.
Psaltis, Demetri, Pu, Ye, Tsang, Mankei, Wu, Jie   +3 more
core  

Realistic and verifiable coherent control of excitonic states in a light harvesting complex [PDF]

, 2014
We explore the feasibility of coherent control of excitonic dynamics in light harvesting complexes, analyzing the limits imposed by the open nature of these quantum systems.
Calarco, Tommaso, Caruso, Filippo, Hoyer, Stephan, Montangero, Simone, Plenio, Martin B., Sarovar, Mohan, Whaley, K. Birgitta   +6 more
core   +2 more sources

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

Ocean Biogeochemical Fingerprints of Fast‐Sinking Tunicate and Fish Detritus

Geophysical Research Letters
Pelagic tunicates (salps, pyrosomes) and fishes generate jelly falls and/or fecal pellets that sink roughly 10 times faster than bulk oceanic detritus, but their impacts on biogeochemical cycles in the ocean interior are poorly understood.
Jessica Y. Luo, Charles A. Stock, John P. Dunne, Grace K. Saba, Lauren Cook   +4 more
doaj   +1 more source

The biological pump effects of phytoplankton on the occurrence and benthic bioaccumulation of hydrophobic organic contaminants (HOCs) in a hypereutrophic lake

Ecotoxicology and Environmental Safety, 2021
The distribution of hydrophobic organic contaminants (HOCs) in eutrophic ecosystems has been widely studied, but how phytoplankton blooms affect their occurrence and benthic bioaccumulation is poorly understood. To fill this knowledge gap, the biological
Qiqi Ding, Xionghu Gong, Miao Jin, Xiaolong Yao, Lu Zhang, Zhonghua Zhao   +5 more
doaj   +1 more source

Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?

FEBS Letters, EarlyView.
This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes, Guilherme M. Azevedo, Amanda P. Barcellos, Diana Bahia   +3 more
wiley   +1 more source

The Components and Boundaries of Mechanisms [PDF]

, 2017
Mechanisms are said to consist of two kinds of components, entities and activities. In the first half of this chapter, I examine what entities and activities are, how they relate to well-known ontological categories, such as processes or dispositions ...
Kaiser, Marie I.
core   +1 more source

Kidney epithelial cells are active mechano-biological fluid pumps

Nature Communications, 2022
Abstract The role of mechanical forces driving kidney epithelial fluid transport and morphogenesis in kidney diseases is unclear. Here, using a microfluidic platform to recapitulate fluid transport activity of kidney cells, we report that renal epithelial cells can actively generate hydraulic pressure gradients across the epithelium ...
Mohammad Ikbal Choudhury, Yizeng Li, Panagiotis Mistriotis, Ana Carina N. Vasconcelos, Eryn E. Dixon, Jing Yang, Morgan Benson, Debonil Maity, Rebecca Walker, Leigha Martin, Fatima Koroma, Feng Qian, Konstantinos Konstantopoulos, Owen M. Woodward, Sean X. Sun   +14 more
openaire   +3 more sources

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source