Filtering by Subject: Biochemistry, Biophysics, and Structural Biology

A direct evaluation of long-term global Leaf Area Index (LAI) products using massive high-quality LAI validation samples derived from Landsat archive

Junjun Zha, Muyi Li, Zaichun Zhu, et al.

Published: 2023-09-12
Subjects: Biochemistry, Biophysics, and Structural Biology

The long-term global Leaf Area Index (LAI) products are critical supports for characterizing the changes in land surface and its interactions with other components of the Earth system under the dramatic global change. However, intercomparisons between current available long-term global LAI products present significant spatiotemporal inconsistencies which have been a persistent source of [...]

Oxidoreductases and metal cofactors in the functioning of Earth

Bruno Hay Mele, Maria Monticelli, Serena Leone, et al.

Published: 2023-05-14
Subjects: Biochemistry, Biophysics, and Structural Biology, Biogeochemistry, Biology, Microbiology

Life sustains itself using energy generated by thermodynamic disequilibria, commonly existing as redox disequilibria. Metals are significant players in controlling redox reactions, as they are essential components of the engine that life uses to tap into the thermodynamic disequilibria necessary for metabolism. The number of proteins that evolved to catalyze redox reactions is extraordinary, as [...]

Geosphere and Biosphere coevolution: the role of trace metals availability in the evolution of biogeochemistry

Donato Giovannelli

Published: 2022-11-20
Subjects: Biochemistry, Biophysics, and Structural Biology, Biogeochemistry, Earth Sciences, Ecology and Evolutionary Biology, Microbiology, Planetary Sciences

Earth’s geosphere and biosphere have coevolved over time, influencing each other’s stability and keeping our planet habitable for most of its 4.543 billion years of history. Biogeochemical cycles play a key role in controlling this interaction, connecting long-term geological cycles and the much faster evolution of the Earth’s outer biologically dominated envelopes. A small set of [...]

Fencing farm dams to exclude livestock halves methane emissions and improves water quality.

Martino Edoardo Malerba, David B. Lindenmayer, Benjamin Scheele, et al.

Published: 2022-03-31
Subjects: Agricultural Science, Agriculture, Agronomy and Crop Sciences Life Sciences, Biochemistry, Biophysics, and Structural Biology, Earth Sciences, Environmental Sciences

Agricultural practices have created tens of millions of small artificial water bodies (“farm dams” or “agricultural ponds”) to provide water for domestic livestock worldwide. Among freshwater ecosystems, farm dams have some of the highest greenhouse gas (GHG) emissions per m2 due to fertilizer and manure run-off boosting methane production – an extremely potent GHG. However, management strategies [...]

Scum of the Earth: a hypothesis for prebiotic multi-compartmentalised environments}

Craig Robert Walton, Oliver Shorttle

Published: 2021-09-14
Subjects: Biochemistry, Biophysics, and Structural Biology, Earth Sciences, Planetary Sciences

Compartmentalisation by bioenergetic membranes is a universal feature of life. The eventual compartmentalisation of prebiotic systems is therefore often argued to comprise a key step during the origin of life. Compartments may have been active participants in prebiotic chemistry, concentrating and spatially organising key reactants. However, most prebiotically plausible compartments are leaky or [...]

Effectiveness of the Geospatial Data Processing and Use of Statistical Information for Proper Environmental Planning and Zoning: Example of the Šumava National Park, Czech Republic

Polina Lemenkova

Published: 2019-01-28
Subjects: Biochemistry, Biophysics, and Structural Biology, Biodiversity, Cell and Developmental Biology, Earth Sciences, Ecology and Evolutionary Biology, Education, Educational Methods, Environmental Education, Environmental Health and Protection, Environmental Indicators and Impact Assessment, Environmental Monitoring, Environmental Sciences, Environmental Studies, Forest Biology, Forest Management, Forest Sciences, Geography, Geomorphology, Life Sciences, Natural Resources and Conservation, Natural Resources Management and Policy, Other Forestry and Forest Sciences, Physical Sciences and Mathematics, Sedimentology, Social and Behavioral Sciences, Soil Science, Sustainability, Wood Science and Pulp, Paper Technology

Current paper details methodology and principles of the zoning and ranging of the nature reserve area of Sumava National Park (Czech Republic) aimed at the effective planning and monitoring special nature areas.Methodology includes complex geoecological assessment of the territory, GIS application and processing of statristical data. The specific case study includes unique nature area of the [...]

TIMS analysis of neodymium isotopes in human tooth enamel using 1013 Ω amplifiers

Esther Plomp, Isabella von Holstein, Janne Koornneef, et al.

Published: 2018-11-03
Subjects: Biochemistry, Biochemistry, Biophysics, and Structural Biology, Life Sciences

Human provenance studies employing isotope analysis are essential in archaeological and forensic sciences but current applications provide limited spatial resolution. This study reports on the potential of neodymium isotope composition (143Nd/144Nd) to improve human provenancing capabilities. Human tissues contain very low (<0.1 ppm) neodymium concentrations, such that previous composition [...]

The prognostic equation for biogeochemical tracers has no unique solution.

Han Geurdes

Published: 2017-10-26
Subjects: Biochemistry, Biophysics, and Structural Biology, Life Sciences, Mathematics, Physical Sciences and Mathematics

In this paper, a tracer prognostic differential equation related to the marine chemistry HAMOCC model is studied. Recently the present 5 6 7 8 author found that the Navier -Stokes equation has no unique general solution [Geurdes, 2017]. The following question can therefore be justified. Do numerical solutions, found from prognostic equations akin to the Navier Stokes equation, provide unique [...]

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