One carbon cycle

Ebook "Oceanography and marine biology: An annual review (Volume 47)" remains one of the most cited sources in marine science and oceanography. The ever increasing interest in work in oceanography and marine biology and its relevance to global environmental issues, especially global climate change and its impacts, creates a demand for authoritative reviews summarizing the results of recent research. For more than 50 years, OMBAR has been an essential reference for research workers and students in all fields of marine science.

364p duongthandue0501 28-02-2024 2 1   Download

RNA-binding proteins (RBPs) function as master regulators of gene expression. Alterations in RBP expression and function are often observed in cancer and influence critical pathways implicated in tumor initiation and growth. Identification and characterization of oncogenic RBPs and their regulatory networks provide new opportunities for targeted therapy.

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Nitrogen is one of the most important major limiting nutrients for most crops and other plant species. Nitrogen fertilizers affect the balance of the global nitrogen cycle, pollute groundwater and increase atmospheric nitrous oxide (N2O), a potent "greenhouse" gas. The production of nitrogen fertilizer by industrial nitrogen fixation not only depletes our finite reserves of fossil fuels but also generates large quantities of carbon dioxide, contributing to global warming

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The production of fine roots (diameter ≤2 mm) contributes considerably to carbon cycling in forest ecosystems. Fine roots constitute a significant organic matter pool with high net primary productivity and turnover. In this study, fine root decomposition, mortality, and production were estimated at a Quercus serrata Murr. plantation in Japan by using rates of diameter-dependent root mortality, decomposition, and the thickening method employed. Sequential soil core and litter bag techniques were used to collect field data. The experiments were set up in a 20×20 m plot.

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Diatoms represent an important class of aquatic phototrophs. They are not only one of the major contributors to global carbon fixation, but they also play a key role in the biogeochemical cycling of silica.

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Autotrophic Archaea of the family Sulfolobaceae (Cre-narchaeota) use a modified 3-hydroxypropionate cycle for carbon dioxide assimilation. In this cycle the ATP-depend-ent carboxylations of acetyl-CoA and propionyl-CoA to malonyl-CoA and methylmalonyl-CoA,respectively,rep-resent the key CO2fixation reactions. These reactions were studied in the thermophilic and acidophilicMetallosphaera sedula and are shown to be catalyzed by one single large enzyme,which acts equally well on acetyl-CoA and pro-pionyl-CoA....

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IN CHAPTER 5 WE DISCUSSED plants’ requirements for mineral nutrients and light in order to grow and complete their life cycle. Because living organisms interact with one another and their environment, mineral nutrients cycle through the biosphere. These cycles involve complex interactions, and each cycle is critical in its own right. Because the amount of matter in the biosphere remains constant, energy must be supplied to keep the cycles operational. Otherwise increasing entropy dictates that the flow of matter would ultimately stop.

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