Results 131 to 140 of about 2,429,852 (338)

Ejaculate Investment in a Promiscuous Rodent, \u3cem\u3ePeromyscus maniculatus\u3c/em\u3e: Effects of Population Density and Social Role [PDF]

open access: yes, 2006
Questions: How does average male investment in ejaculates vary with changing population density (and thus with the risk of sperm competition) in a promiscuous species? Do individual male investment strategies vary with population density?
Long, Tristan A.F., Montgomerie, Robert
core   +1 more source

Loss of proton‐sensing GPR4 reduces tumor progression in mouse models of colon cancer

open access: yesMolecular Oncology, EarlyView.
G protein‐coupled receptor 4 (GPR4) is a pH‐sensing receptor activated by acidic pH. GPR4 expression is increased in patients with inflammatory bowel disease who are at high risk of developing colorectal cancer. In mouse models, loss of GPR4 attenuated tumor progression. This correlated with increased IL2 and natural killer cell activity.
Leonie Perren   +16 more
wiley   +1 more source

Divergent Biosynthesis of C-Nucleoside Minimycin and Indigoidine in Bacteria

open access: yesiScience, 2019
Summary: Minimycin (MIN) is a C-nucleoside antibiotic structurally related to pseudouridine, and indigoidine is a naturally occurring blue pigment produced by diverse bacteria.
Liyuan Kong   +11 more
doaj  

The reproductive dynamics of temperate amphibians: a review [PDF]

open access: yes, 2007
The annual life cycle of pond breeding amphibians is characterized by periodical migrations between three critical habitats: breeding, post breeding - feeding - and hibernating.
Geltsch, Ioana Cristina   +3 more
core   +1 more source

Predicting coexistence of plants subject to a tolerance-competition trade-off

open access: yes, 2013
Ecological trade-offs between species are often invoked to explain species coexistence in ecological communities. However, few mathematical models have been proposed for which coexistence conditions can be characterized explicitly in terms of a trade-off.
Etienne, Rampal S.   +2 more
core   +4 more sources

TRPM8 levels determine tumor vulnerability to channel agonists

open access: yesMolecular Oncology, EarlyView.
TRPM8 is a Ca2+ permissive channel. Regardless of the amount of its transcript, high levels of TRPM8 protein mark different tumors, including prostate, breast, colorectal, and lung carcinomas. Targeting TRPM8 with channel agonists stimulates inward calcium currents followed by emptying of cytosolic Ca2+ stores in cancer cells.
Alessandro Alaimo   +18 more
wiley   +1 more source

Eukaryotic Adaptation to Years-Long Starvation Resembles that of Bacteria

open access: yesiScience, 2019
Summary: The Growth Advantage in Stationary Phase (GASP) phenomenon, described in bacteria, reflects the genetic adaptation of bacteria to stress, including starvation, for a long time.
Tzemach Aouizerat   +10 more
doaj  

Competition between Bending and Internal Pressure Governs the Mechanics of Fluid Nanovesicles

open access: yesACS Nano, 2017
Nanovesicles (∼100 nm) are ubiquitous in cell biology and an important vector for drug delivery. Mechanical properties of vesicles are known to influence cellular uptake, but the mechanism by which deformation dynamics affect internalization is poorly ...
D. Vorselen   +3 more
semanticscholar   +1 more source

Comprehensive omics‐based classification system in adult patients with B‐cell acute lymphoblastic leukemia

open access: yesMolecular Oncology, EarlyView.
The COMBAT classification system, developed through multi‐omics integration, stratifies adult patients with B‐cell acute lymphoblastic leukemia(B‐ALL) into three molecular subtypes with distinct surface antigen patterns, immune landscape, methylation patterns, biological pathways and prognosis.
Yang Song   +11 more
wiley   +1 more source

Coexistence and relative abundance in annual plant assemblages: The roles of competition and colonization [PDF]

open access: yes, 2002
Although an interspecific trade-off between competitive and colonizing ability can permit multispecies coexistence, whether this mechanism controls the structure of natural systems remains unresolved.
Levine, J.M., Rees, M.
core  

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