Results 71 to 80 of about 4,386,581 (289)

Natural sulfurization of carbohydrates in marine sediments : consequences for the chemical and carbon isotopic composition of sedimentary organic matter [PDF]

, 2003
Carbohydrates make up the largest part of the organic matter in the biosphere and are used by living organism for many different reasons. They serve, among others, as carbon and energy source as well as metabolic intermediates.
Organic geochemistry & molecular biogeology, Resistant Organic Matter (ROM), IVAU: Instituut voor Aardwetenschappen Utrecht, Dongen, B.E. van, Molecular palaeontology of marine sediments, Geochemistry, van Dongen, B.E.   +6 more
core   +1 more source

Gas exchange and organic substance production of Scots pine (Pinus silvestris L.) seedlings grown in soil cultures with ammonium or nitrate form of nitrogen

Acta Societatis Botanicorum Poloniae, 2015
Scotts pine seedlings were grown in soil cultures with a known content of N and C as well as organic substances. Walter solutions of the following salts: NaNO3, (NH4)2SO4, NH4Cl, NH4NO3, NH4HCO3 were used as a source of nitrogen in particular nutritional
J. Zajączkowska
doaj   +1 more source

The microbiome in human skin aging

FEBS Letters, EarlyView.
Age‐related skin changes encompass the well‐known visible phenotypic alterations, together with microbiome dysbiosis and a series of molecular aging hallmarks. These hallmarks characterize not only a fully stablished aged phenotype but also the skin aging process itself.
Manuel Huerta Arana, Cornelia Wiegand, Omid Omrani, Mario Fabri   +3 more
wiley   +1 more source

Accumulation of Organic Matter in a Series of Douglas-fir Stands

Canadian Journal of Forest Research, 1975
The total aboveground biomass of a series of Douglas-fir stands which are located in western Washington increased with age while the foliar biomass and total crown biomass reached a steady state of about 11 000 kg/ha at between 40 and 50 years, depending upon stand density. Maximum wood productivity occurred near the time of crown closure, but the age
Turner, J., Long, James N.
openaire   +2 more sources

Autophagy and mitophagy in pancreatic β‐cell homeostasis and their involvement in diabetes pathophysiology

FEBS Letters, EarlyView.
This review focuses on the role of autophagy and mitophagy in maintaining pancreatic β‐cell function and homeostasis. We discuss how genetic defects affecting these pathways contribute to the development of type 1, type 2, monogenic, and gestational diabetes. We further explore their potential as therapeutic targets. Created in BioRender.
Yunkyeong Lee, Mingming Tong, Anna L. Gloyn   +2 more
wiley   +1 more source

Nutrient Accumulation in the Sediment of Silvofishery Ponds in Semarang

Makara Journal of Science, 2017
Information concerning the functionality of mangrove within silvofishery ponds is needed, especially relating to the accumulation rate of organic materials and nutrients.
Endah Dwi Hastuti, Rini Budihastuti
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Enrichment Mechanism of the Upper Carboniferous-Lower Permian Transitional Shale in the East Margin of the Ordos Basin, China: Evidence from Geochemical Proxies

Geofluids, 2020
The organic-rich shale of the Upper Carboniferous-Lower Permian transition period in the eastern margin of the Ordos Basin, China, was formed in a marine-continental facies sedimentary environment.
Zhifu Wei, Yongli Wang, Gen Wang, Ting Zhang, Wei He, Xueyun Ma, Xiaoli Yu   +6 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +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