Last edited by Faem
Friday, July 17, 2020 | History

4 edition of Studies in the nitrogen metabolism of bacteria ... found in the catalog.

Studies in the nitrogen metabolism of bacteria ...

by Harry Johnson Sears

  • 143 Want to read
  • 39 Currently reading

Published by American Medical Association in [Chicago .
Written in English

    Subjects:
  • Bacteria -- Biology, etc,
  • Metabolism

  • Edition Notes

    Thesis (PH. D.)--Leland Stanford Junior University, 1916.

    Other titlesNitrogen metabolism of bacteria.
    Statementby H.J. Sears ...
    Classifications
    LC ClassificationsQR84 .S5
    The Physical Object
    Pagination35, [1] p.
    Number of Pages35
    ID Numbers
    Open LibraryOL6597237M
    LC Control Number17011861
    OCLC/WorldCa11516460

    The conversion of nitrogen gas (N 2) into nitrates and nitrites through atmospheric, industrial and biological processes is called nitrogen heric nitrogen must be processed, or "fixed", into a usable form to be taken up by n 5 and 10 billion kg per year are fixed by lightning strikes, but most fixation is done by free-living or symbiotic bacteria known as diazotrophs.   Studies with diazotrophic organisms are of great importance due to their contribution to the nitrogen supply in different ecosystems, including natural and managed systems.

    The study of “biochemical mutants” has also led to a great deal of information notably about synthetic mechanisms in amino acid metabolism. A further, much exploited property is their ability to synthesise adaptive enzymes under the stimulus of an appropriate inducing agent (see . Nitrogen Fixation Nitrogen Metabolism There are several elements present on our earth like oxygen, carbon, hydrogen, etc. which are vital for many living organisms. Nitrogen is one of them. These are present in various vitamins, proteins, amino acids, and hormones. Consequently, these elements and their effects must be studied too.

    Abstract The biochemical genetics approach is defined as the use of mutants, in comparative studies with the wild‐type, to obtain information about biochemical and physiological processes in complex metabolic systems. This approach has been used extensively, for example in studies on the bioenergetics of the photosynthetic bacteria, but has been applied less frequently to studies of. Abstract. We estimated rates of heterotrophic bacterial and phytoplankton uptake of nitrate, ammonium, and urea using 15 N-labelled nitrogen and specific metabolic inhibitors of prokaryote and eukaryote nitrogen metabolism in the surface waters of the North Water (northern Baffin Bay) during autumn that were characterized by the absence of cyanobacteria (comprising prochlorophytes).


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Studies in the nitrogen metabolism of bacteria .. by Harry Johnson Sears Download PDF EPUB FB2

The study of nitrogen metabolism in Helicobacter pylori was initially made possible by the development of defined growth media, which permitted (i) the determination of the minimal amino acid requirements of this bacterium and (ii) the following of the fate of amino acids in whole bacteria.

The subsequent publication of the complete genomic sequences of two H. pylori strains, and J   Studies in the Nitrogen Metabolism of Bacteria (Classic Reprint) Paperback – 20 June by Harry Johnson Sears (Author) See all formats and editions Hide other formats and editionsAuthor: Harry Johnson Sears.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

This volume explores several different aspects of nitrogen metabolism, ranging from nitrogen uptake to assimilation.

The chapters in this book cover topics such as measurement of activities of enzymes involved in nitrogen metabolism (i.e., nitrate reductase); measurement of nitric oxide, nitrite and ways to detect the N content in plants and microbes; characterization of root nodule bacteria.

Abstract. Studies of the nitrogen nutrition and pathways of ammonia assimilation in Rhodocyclus purpureus and Rhodospirillum tenue have shown that these two seemingly related bacteria differ considerably in aspects of their nitrogen by: The nitrogen c ycle is an ideal demo nstration of the eco logic interdependence of bacteria, plants, and anim als.

Nitrogen is recycled when organisms use one form of ni trogen for growth and. Photosynthetic bacteria (PSB) are widely-distributed prokaryotes that are capable of carrying out photosynthesis. Due to having multiple pathways of energy and substance metabolism, PSB can utilize various substrates such as organic matters, nitrate, ammonia and sulfide to metabolize under light or oxygen condition (Lu et al., ).Since the s, PSB wastewater treatment has been.

tions between nitrogen-fixing bacteria and plants. In the pursuit of this goal, intensive efforts have been directed toward studies of the genetics, biochemistry, and ecology of both free-living and symbiotic nitrogen-fixing organisms.

It has already become apparent that. Metabolism refers to all the biochemical reactions that occur in a cell or organism. The study of bacterial metabolism focuses on the chemical diversity of substrate oxidations and dissimilation reactions (reactions by which substrate molecules are broken down), which normally function in bacteria to generate energy.

Also within the scope of bacterial metabolism is the study of the uptake and. Willison JC. Biochemical genetics revisited: the use of mutants to study carbon and nitrogen metabolism in the photosynthetic bacteria.

FEMS Microbiol Rev. Jan; 10 ():1– Willison JC, Tissot G. The Escherichia coli efg gene and the Rhodobacter capsulatus adgA gene code for NH3-dependent NAD synthetase. J Bacteriol. Short reviews cover the dissimilatory reduction of the various inorganic nitrogen intermediates by bacteria, genetic regulation, and ecological and environmental problems.

Inorganic Nitrogen in Plants and Microorganisms will help readers understand recent developments in the field of inorganic nitrogen uptake and metabolism. This crucial nutrient cycle has long been the subject of extensive research, and recently advances in studying the biochemistry, bioinformatics, cell biology, and the physiology of bacterial nitrogen cycling processes, alongside the advent of the omics age, have had a massive impact, amongst other things, enabling us to fully appreciate the sheer diversity of approaches adapted by individual organisms.

Rowell P., Rai A.N., Stewart W.D.P. () Studies on the Nitrogen Metabolism of the Lichens Peltigera Aphthosa and Peltigera Canina. In: Brown D.H. (eds) Lichen Physiology and Cell Biology.

Carbon and nitrogen metabolism in B. subtilis follow the general rules of intermediary metabolism in aerobic bacteria, with a complete glycolytic pathway and a tricarboxylic acid cycle.

Electron transfer to oxygen is mediated by a set of cytochromes and cytochrome oxidases, allowing efficient respiration in. The main part of nitrogen metabolism is the Nitrogen Cycle.

A molecule of nitrogen is made of two nitrogen atoms held together by a very strong triple covalent bond (N ≡ N). There are three main pools of nitrogen – atmosphere, soil and biomass. Nitrogen cycles between these pools in the following manner: Atmospheric Pool.

Free-living nitrogen-fixing organisms: these organisms, both bacteria and archaea, fix nitrogen for their own use that ends up being shared when the organisms dies or is ingested. Free-living nitrogen-fixing organisms that grow anaerobically do not have to worry about.

Nitrogen cycle converts this nitrogen into a usable form. Lightning fixes Nitrogen to NH 3, and nitrogen fixing bacteria like Rhizobium (which live in roots of leguminous plants like pea, rajma, beans, pulses etc.) also convert N 2 into NH 3. Most plants absorb nitrates from soil and reduce it to NH 3 in the cells for further metabolic reactions.

Nitrogen Metabolism. Nitrogen is a very important constituent of cellular components. The nif genes are found in both free-living nitrogen-fixing bacteria and in symbiotic bacteria associated with various recent studies support the view that the molecular N2 is reduced on the surface of the enzyme nitrogenase in a multistep process.

Ammonia-nitrogen-limited continuous cultures of Escherichia coli and Klebsiella aerogenes contain induced levels of glutamine synthetase that is deadenylyated (i.e., fully active).

In the presence of excess ammonia or glutamate in glucose-limited cultures of E. coli, glutamine synthetase is repressed and adenylylated (inactive). STUDIES IN BACTERIAL METABOLISM.

LXV c One of the most conspicuous, versatile and puzzling groups of bacteria commonly encountered is that one on which Hauser1 con-ferred the very appropriate appellation "Proteus." Originally, the Total nitrogen Protein nitrogen Nonprotein nitrogen, Polypeptid nitrogen.

Amino nitrogen. Lindstrom ES, Burris RH, Wilson PW. NITROGEN FIXATION BY PHOTOSYNTHETIC BACTERIA. J Bacteriol. Sep; 58 (3)– [PMC free article] SIEGEL JM, KAMEN MD. Studies on the metabolism of photosynthetic bacteria. VI.

Metabolism of isopropanol by a new strain of Rhodopseudomonas gelatinosa. J Bacteriol. May; 59 (5)–A. Danchin, in Encyclopedia of Genetics, Intermediary Metabolism.

Carbon and nitrogen metabolism in B. subtilis follow the general rules of intermediary metabolism in aerobic bacteria, with a complete glycolytic pathway and a tricarboxylic acid cycle.

Electron transfer to oxygen is mediated by a set of cytochromes and cytochrome oxidases, allowing efficient respiration in B.

subtilis. where R sample and R standard represent the isotope ratio δ 15 N () in the sample and in the standard respectively, calculated using equation (1).By convention, R is the ratio of the less abundant isotope over the most abundant isotope (i.e.

15 N/ 14 N for nitrogen). As previously discussed, the δ 15 N value changes under the influence of chemical and physical processes.