Results 71 to 80 of about 4,485 (193)

The Metabolic Awakening of Barley Seedlings: A Time‐Resolved View of How Germination and Light Shape Tissue‐Specific Metabolic Networks

Plant Direct, Volume 10, Issue 7, July 2026.
ABSTRACT Integration of internal metabolism with environmental cues is essential for successful establishment and survival of seedlings, with light an important mediator of the transition from skotomorphogenesis to photomorphogenesis. However, detailed knowledge of the metabolic events associated with this critical transition in developing tissues of ...
Claude Y. Hamany Djande, Paul A. Steenkamp, Ian A. Dubery   +2 more
wiley   +1 more source

Decadal Shifts Towards Higher Riverine Silicon Relative to Nitrogen and Phosphorus Across High Latitudes

Global Biogeochemical Cycles, Volume 40, Issue 7, July 2026.
Abstract High‐latitude systems are warming faster than the global average, altering the rates of silicon (Si) mobilization from terrestrial to aquatic systems. Dissolved Si (DSi) concentration and its ratio with other nutrients exert strong controls on algae blooms in fresh and marine receiving waters, especially in high‐latitude regions where diatoms ...
Joanna C. Carey, Nicholas J. Lyon, Keira Johnson, Pamela L. Sullivan, Sidney A. Bush, Lienne R. Sethna, Ruth Heindel, Pirkko Kortelainen, Hjalmar Laudon, Diane M. McKnight, Amanda Poste, Antti Raike, Kathi Jo Jankowski   +12 more
wiley   +1 more source

Size distribution of autotrophy and microheterotrophy in reservoirs: implications for foodweb structure [PDF]

, 1981
Particle size is a primary determinant of resources available to consumers and of the efficiency of energy transfer through planktonic food chains. Dual radioisotopic labeling (with /sup 14/C-bicarbonate and /sup 3/H-acetate) and size fractionation of ...
Kimmel, B. L.
core  

Riparian Processing of Upland Groundwaters Strongly Influences Downstream Transport and Channel Emission of Dissolved Inorganic Carbon Along Agricultural Stream Corridors

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 7, July 2026.
Abstract Headwater streams gain groundwater carrying dissolved inorganic carbon (DIC) from terrestrial environments and are hotspots for biogeochemical processing. The Judith River Watershed is located in a semi‐arid region of the northern Great Plains in central Montana, where stream corridors have spatial variation in hydrological connectivity among ...
Qipei Shangguan, Robert A. Payn, Madison J. Foster, Caitlin M. Mayernik, Stephanie A. Ewing, Michael D. DeGrandpre   +5 more
wiley   +1 more source

Evolutionary Routes to Modern Metabolic Pathways

Macromol
Metabolism, the network of biochemical reactions that powers life, arose under conditions radically different from those on Earth today. Investigating its origins reveals how initially simple chemical processes gradually integrated nucleic acid and then ...
Alberto Vázquez-Salazar, Israel Muñoz-Velasco   +1 more
doaj   +1 more source

Methane and Nitrous Oxide Reshape the Air‐Water Greenhouse Gas Budget of a Tropical Estuarine Delta

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 7, July 2026.
Abstract Estuaries are important sources and sinks of greenhouse gases (GHGs), yet assessments of their radiative balance often focus primarily on carbon dioxide (CO2), with less attention given to methane (CH4) and nitrous oxide (N2O). We combine measurements of CH4 and N2O air‐water fluxes with concurrent CO2 data in a tropical estuarine delta ...
Luiz C. Cotovicz Jr., Renato P. Ribeiro, Luciana O. Vidal, Marcelo C. Bernardes, Carlos E. De Rezende, Batiaan A. Knoppers, Gwenaël Abril   +6 more
wiley   +1 more source

Biochemical Basis of Obligate Autotrophy in Nitrosomonas europaea [PDF]

Journal of Bacteriology, 1969
The specific activities of isocitric dehydrogenase, α-ketoglutaric dehydrogenase, succinic dehydrogenase, malic dehydrogenase, and reduced nicotinamide adenine dinucleotide (NADH) oxidase were determined in extracts of Nitrosomonas europaea and compared with the corresponding values for Anacystis ...
openaire   +2 more sources

Changes in 13C/12C of oil palm leaves to understand carbon use during their passage from heterotrophy to autotrophy

, 2009
The carbon isotope composition of leaf bulk organic matter was determined on the tropical tree Elaeis guineensis Jacq. (oil palm) in North Sumatra (Indonesia) to get a better understanding of the changes in carbon metabolism during the passage from ...
Jaleh Ghashghaie, Sébastien Girard, Emmanuelle Lamade, Ghashghaie, Jaleh, Girard, Sébastien, Setiyo, Indra Eko, Lamade, Emmanuelle, Indra Eko Setiyo   +7 more
core   +1 more source

In-service teachers’ expressions of TSPCK

LUMAT
This study addresses the question of how teachers reason about teaching autotrophy and heterotrophy, and contributes to TSPCK research in biology.  Topic-specific pedagogical content knowledge (TSPCK) is a knowledge base in the framework of PCK and is ...
Jessica Sundman, Ann-Sofi Röj-Lindberg, Pia Sjöblom   +2 more
doaj   +1 more source

Modern Understanding of the Matter in the Context of Autotrophy

Общество: философия, история, культура, 2020
The study considers philosophical questions on the problems of matter, identifies prospects for the further development of the cognitive potential of the philosophy of matter in the context of cosmic autotrophy. An explanation of the origin of the diverse world of matter is given.
openaire   +1 more source