Results 101 to 110 of about 16,044 (237)

Frozen and Scorched: Genomic Signatures of Adaptive Divergence and Hibernation in the Living Fossil Dromiciops

open access: yesEcology and Evolution, Volume 16, Issue 8, August 2026.
We evaluated adaptation to torpor and hibernation in the genus Dromiciops by comparing it with both torpid and non‐torpid marsupials, and investigated divergent selection signals between its two species. For the ancestral node, we identified positive selection in the genes PFKFB2, LAMP3, OTX1, and RAPSN, alongside an enrichment of pathways potentially ...
Elisa Gonzalez‐Ugalde   +7 more
wiley   +1 more source

Polymicrobial Extracellular Vesicles Reduce the Innate Immune Response of Human Cystic Fibrosis Bronchial Epithelial Cells

open access: yesJournal of Extracellular Biology, Volume 5, Issue 8, August 2026.
ABSTRACT Chronic antibiotic‐resistant cystic fibrosis (CF) lung infections are the leading cause of death in adults with CF. Despite advances in highly effective modulator therapies, microbial communities persist in the CF lung. The pathogenesis of CF airway infections can be exacerbated by pathogens such as Pseudomonas aeruginosa, which communicates ...
Lily A. Charpentier   +10 more
wiley   +1 more source

Unveiling the AcSirt2‐FOXO‐Mitophagy Axis: Insights Into Mitochondrial Quality Control and Delayed Aging in Apis cerana

open access: yesAging Cell, Volume 25, Issue 8, August 2026.
Age‐related downregulation of AcSirt2 impairs mitochondrial homeostasis in old bees. AcSirt2‐mediated deacetylation of FOXO enhances transcriptional activity, upregulating antioxidant enzymes (SOD, CAT) and promoting PINK1/Parkin‐mediated mitophagy. This pathway facilitates autophagosome formation and clearance of damaged mitochondria, reducing ROS ...
Qiang Ma   +8 more
wiley   +1 more source

Environmental influences on the maximum quantum yield of terrestrial primary production

open access: yesNew Phytologist, Volume 251, Issue 4, Page 1709-1722, August 2026.
Temperature and aridity effects on terrestrial ecosystems' intrinsic quantum yield. Summary Historically, terrestrial biosphere models (TBMs) have assigned the intrinsic (maximum) quantum yield of photosynthesis (ϕ0) a constant value for each plant functional type. However, experimental studies have shown that ϕ0 – when measured on light‐adapted leaves
David Sandoval   +3 more
wiley   +1 more source

Estimating leaf photosynthesis in maize using chlorophyll fluorometry [PDF]

open access: yes, 1998
Genetic improvement of commercial maize hybrids has resulted in higher crop growth rates, which may be attributable to increased rates of photosynthetic carbon assimilation, decreased respiratory carbon losses, or both.
Earl, Hugh J.
core  

Circular RNAs in Lotus japonicus Responses to Nutrient Supply and Mesorhizobium Symbiosis

open access: yesPlant, Cell &Environment, Volume 49, Issue 8, Page 4823-4839, August 2026.
ABSTRACT Symbiotic interactions between legumes and rhizobia enable nitrogen fixation under low nutrient conditions. The establishment and function of symbiotic interactions require coordinated changes in gene expression in both the host and the microbe. Circular RNAs (circRNAs) are endogenous gene‐specific molecules that can regulate transcription and
Delecia Utley   +3 more
wiley   +1 more source

Biomaterial culture conditions impacting the performance of a PAM fluorometry based aquatic phytotoxicity assay [PDF]

open access: yes, 2007
An aquatic phytotoxicity assay, based on the principles of pulse amplitude modulated (PAM) fluorometry has recently been developed and validated under laboratory conditions.
Quayle, P.   +3 more
core   +1 more source

In situ Measurements of Phytoplankton Fluorescence Using Low Cost Electronics

open access: yesSensors, 2013
Chlorophyll a fluorometry has long been used as a method to study phytoplankton in the ocean. In situ fluorometry is used frequently in oceanography to provide depth-resolved estimates of phytoplankton biomass.
Dana L. Wright   +2 more
doaj   +1 more source

Vestigial Plastids in Parasitic Plants: Evolutionary Remnants or Adaptive Innovations?

open access: yesPlant, Cell &Environment, Volume 49, Issue 8, Page 5401-5420, August 2026.
ABSTRACT Throughout the evolutionary history of plants, chloroplasts originating from a cyanobacterial endosymbiosis have undergone remarkable adaptation and specialization, giving rise to a multitude of plastid types. The evolution toward parasitism in plants represents a particularly extreme case of such specialization.
Laia Jené, Sergi Munné‐Bosch
wiley   +1 more source

MINICOMPUTER GIVES FAST TURNAROUND FOR FLUOROMETRY. [PDF]

open access: yes, 1981
Excellent selectivity and sensitivity have led to the routine use of fluorescence spectroscoy in the analysis of a wide variety of samples in diverse fields.
Warner, Isiah M.   +2 more
core  

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