GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Material
Publisher
Person/Organisation
Language
Years
FID
Subjects(RVK)
  • 1
    Online Resource
    Online Resource
    Use of Variations in Natural Nitrogen Isotope Abundance for Environmental Studies: A Questionable Approach
    American Association for the Advancement of Science (AAAS) ; 1972
    In:  Science Vol. 177, No. 4047 ( 1972-08-04), p. 453-456
    Details
    In: Science, American Association for the Advancement of Science (AAAS), Vol. 177, No. 4047 ( 1972-08-04), p. 453-456
    Type of Medium: Online Resource
    ISSN: 0036-8075 , 1095-9203
    URL: Article
    DOI: 10.1126/science.177.4047.453
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 1972
    detail.hit.zdb_id: 128410-1
    detail.hit.zdb_id: 2066996-3
    detail.hit.zdb_id: 2060783-0
    SSG: 11
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Modified method for estimating the lecithin/sphingomyelin ratio in amniotic fluid.
    Oxford University Press (OUP) ; 1978
    In:  Clinical Chemistry Vol. 24, No. 1 ( 1978-01-01), p. 174-176
    Details
    In: Clinical Chemistry, Oxford University Press (OUP), Vol. 24, No. 1 ( 1978-01-01), p. 174-176
    Type of Medium: Online Resource
    ISSN: 0009-9147 , 1530-8561
    URL: Article
    DOI: 10.1093/clinchem/24.1.174a
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 1978
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Modified method for estimating the lecithin/sphingomyelin ratio in amniotic fluid.
    Oxford University Press (OUP) ; 1978
    In:  Clinical Chemistry Vol. 24, No. 1 ( 1978-01-01), p. 174-176
    Details
    In: Clinical Chemistry, Oxford University Press (OUP), Vol. 24, No. 1 ( 1978-01-01), p. 174-176
    Type of Medium: Online Resource
    ISSN: 0009-9147 , 1530-8561
    URL: Article
    DOI: 10.1093/clinchem/24.1.0174a
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 1978
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Searching for New Physics with DarkLight at the ARIEL Electron-Linac
    IOP Publishing ; 2022
    In:  Journal of Physics: Conference Series Vol. 2391, No. 1 ( 2022-12-01), p. 012010-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2391, No. 1 ( 2022-12-01), p. 012010-
    Abstract: The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched for such a particle, but so far it has proven elusive. In recent years the concept of a low mass dark photon has gained popularity in the physics community. Of particular recent interest is the 8 Be and 4 He anomaly, which could be explained by a new fifth force carrier with a mass of 17 MeV/ c 2 . The proposed Darklight experiment would search for this potential low mass force carrier at ARIEL in the 10-20 MeV/ c 2 e + e − invariant mass range. This proceeding will focus on the experimental design and physics case of the Darklight experiment.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2391/1/012010
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2166409-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Denitrification Kinetics in Soil Systems: The Significance of Good Fits of Data to Mathematical Forms
    Wiley ; 1976
    In:  Soil Science Society of America Journal Vol. 40, No. 2 ( 1976-03), p. 249-253
    Details
    In: Soil Science Society of America Journal, Wiley, Vol. 40, No. 2 ( 1976-03), p. 249-253
    Abstract: The loss of NO 3 ‐ added to two central Illinois soils was determined in experiments in which the soils were incubated under waterlogged conditions. The loss was measured as a function of substrate concentration in one experiment in which samples were incubated for a single time (24 hours) and as a function of time in a second experiment in which the concentration of the added NO 3 ‐ was held constant (200 ppm NO 3 ‐ ‐N). The rate of loss of NO 3 ‐ was about 5.5 times higher in one of the soils than in the other. This difference was largely overcome by the addition of glucose (1% with respect to the soil) which also greatly enhanced the rate of denitrification in both soils. The experimental points representing the rate of NO 3 ‐ loss plotted as a function of the concentration of added NO 3 ‐ , were equally well fit by Michaelis‐Menten and exponential equations as well as by the solution to a pair of nonlinear differential equations representing a system in which the product of one reaction (e.g., the reductant generated by the oxidation of carbon compounds) is a substrate in a second sequence (e.g., the denitrification of NO 3 ‐ ). The significance of such fits is discussed. The authors point out that while such fits have certain uses, it is not possible to infer from them the mechanism of the reaction.
    Type of Medium: Online Resource
    ISSN: 0361-5995 , 1435-0661
    URL: Article
    DOI: 10.2136/sssaj1976.03615995004000020018x
    RVK:
    RA 4845
    Language: English
    Publisher: Wiley
    Publication Date: 1976
    detail.hit.zdb_id: 241415-6
    detail.hit.zdb_id: 2239747-4
    detail.hit.zdb_id: 196788-5
    detail.hit.zdb_id: 1481691-X
    SSG: 13
    SSG: 21
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Separating the efflux and influx components of net nitrate uptake by Synechococcus R2 under steady-state conditions
    Microbiology Society ; 1991
    In:  Journal of General Microbiology Vol. 137, No. 5 ( 1991-05-01), p. 1179-1184
    Details
    In: Journal of General Microbiology, Microbiology Society, Vol. 137, No. 5 ( 1991-05-01), p. 1179-1184
    Type of Medium: Online Resource
    ISSN: 0022-1287
    URL: Article
    DOI: 10.1099/00221287-137-5-1179
    RVK:
    WA 15000
    Language: English
    Publisher: Microbiology Society
    Publication Date: 1991
    detail.hit.zdb_id: 2008736-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Proline metabolism in N2-fixing root nodules: energy transfer and regulation of purine synthesis.
    Proceedings of the National Academy of Sciences ; 1988
    In:  Proceedings of the National Academy of Sciences Vol. 85, No. 7 ( 1988-04), p. 2036-2040
    Details
    In: Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 85, No. 7 ( 1988-04), p. 2036-2040
    Abstract: N2-fixing root nodules of soybean (Glycine max L. Merr.) convert atmospheric N2 to ammonia(um) in an energy-intensive enzymatic reaction. These nodules synthesize large quantities of purines because nitrogen fixed by bacteria contained within this tissue is transferred to the shoots in the form of ureides, which are degradation products of purines. In animal systems, it has been proposed that proline biosynthesis by pyrroline-5-carboxylate reductase (P5CR) is used to generate the NADP+ required for the synthesis of the purine precursor ribose 5-phosphate. We have examined the levels, properties, and location of P5CR and proline dehydrogenase (ProDH) in soybean nodules. Nodule P5CR was found in the plant cytosol. Its activity was substantially higher than that reported for other animal and plant tissues and is 4-fold higher than in pea (Pisum sativum) nodules (which export amides). The Km for NADPH was lower by a factor of 25 than the Km for NADH, while the Vmax with NADPH was one-third of that with NADH. P5CR activity was diminished by NADP+ but not by proline. These characteristics are consistent with a role for P5CR in supporting nodule purine biosynthesis rather than in producing proline for incorporation into protein. ProDH activity was divided between the bacteroids and plant cytosol, but less than 2% was in the mitochondria-rich fractions. The specific activity of ProDH in soybean nodule bacteroids was comparable to that in rat liver mitochondria. In addition, we propose that some of the proline synthesized in the plant cytosol by P5CR is catabolized within the bacteroids by ProDH and that this represents a novel mechanism for transferring energy from the plant to its endosymbiont.
    Type of Medium: Online Resource
    ISSN: 0027-8424 , 1091-6490
    URL: Article
    DOI: 10.1073/pnas.85.7.2036
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Proceedings of the National Academy of Sciences
    Publication Date: 1988
    detail.hit.zdb_id: 209104-5
    detail.hit.zdb_id: 1461794-8
    SSG: 11
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Isolation, DNA sequence analysis, and mutagenesis of a proline dehydrogenase gene (putA) from Bradyrhizobium japonicum
    American Society for Microbiology ; 1996
    In:  Applied and Environmental Microbiology Vol. 62, No. 1 ( 1996-01), p. 221-229
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 62, No. 1 ( 1996-01), p. 221-229
    Abstract: We report here the cloning and sequencing of the gene for proline dehydrogenase (putA) of Bradyrhizobium japonicum. An open reading frame coding for 1,016 amino acids was identified. The B. japonicum gene codes for a bifunctional protein with proline dehydrogenase and pyrroline-5-carboxylate (P5C) dehydrogenase activities, as it does in Escherichia coli and Salmonella typhimurium. Comparison of the sequences of these proteins with other proline and P5C dehydrogenase sequences identified proline dehydrogenase and P5C dehydrogenase catalytic domains. Within the proline dehydrogenation domain, several areas of high identity were observed between B. japonicum, E. coli, S. typhimurium, Saccharomyces cerevisiae put1, and Drosophila melanogaster slgA. Within the P5C dehydrogenase domain, several areas of high identity were observed between B. japonicum, E. coli, S. typhimurium, Bacillus subtilis ipa76d, and S. cerevisiae put2. A consensus catalytic site for semialdehyde dehydrogenase was observed in the P5C dehydrogenase domain. This suggests that the substrate for this domain may be the open-chain gamma-glutamylsemialdehyde, not its cyclized form, P5C. Unlike the gene isolated from E. coli, S. typhimurium, and K. pneumoniae, the B. japonicum putA gene does not appear to be part of an operon with the proline porter gene (putP). Additionally, the B. japonicum gene lacks the putative C-terminal regulatory domain present in the E. coli and S. typhimurium genes. The gene was disrupted by insertion of antibiotic resistance gene cassettes, which were then recombined into the bacterial chromosome. Symbiotically active mutant strains that were devoid of putA activity were isolated. With this proline dehydrogenase clone, we will test the hypothesis that putA in symbiotic nitrogen-fixing B. japonicum bacteroids is transcriptionally regulated by drought and other stresses.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/aem.62.1.221-229.1996
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1996
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    A Steady‐State Model of Isotopic Fractionation Accompanying Nitrogen Transformations in Soil
    Wiley ; 1974
    In:  Soil Science Society of America Journal Vol. 38, No. 2 ( 1974-03), p. 315-322
    Details
    In: Soil Science Society of America Journal, Wiley, Vol. 38, No. 2 ( 1974-03), p. 315-322
    Abstract: A steady‐state mathematical model of isotopic fractionation accompanying certain nitrogen transformations in soils is developed. The model takes into account ammonification, nitrification, and immobilization; and predicts that the 15 N/ 14 N ratios of nitrate and ammonium ion depend in part upon the ratio of the rates of immobilization and ammonification. The ratio of the rates of immobilization to nitrification under field conditions is unlikely to be the same as under the conditions of laboratory incubation experiments. Therefore, this prediction provides a possible explanation for differences observed between the 15 N/ 14 N ratio of nitrate extracted from soil cores and that of nitrate released during laboratory incubation of the same soils. The model described is ammenable to experimental test. If verified, an expanded version of the model may be a useful aid in the study of nitrogen transformations in the field.
    Type of Medium: Online Resource
    ISSN: 0361-5995 , 1435-0661
    URL: Article
    DOI: 10.2136/sssaj1974.03615995003800020030x
    RVK:
    RA 4845
    Language: English
    Publisher: Wiley
    Publication Date: 1974
    detail.hit.zdb_id: 241415-6
    detail.hit.zdb_id: 2239747-4
    detail.hit.zdb_id: 196788-5
    detail.hit.zdb_id: 1481691-X
    SSG: 13
    SSG: 21
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Variation of 15N in Corn and Soil Following Application of Fertilizer Nitrogen
    Wiley ; 1973
    In:  Soil Science Society of America Journal Vol. 37, No. 6 ( 1973-11), p. 888-892
    Details
    In: Soil Science Society of America Journal, Wiley, Vol. 37, No. 6 ( 1973-11), p. 888-892
    Abstract: Samples of corn ( Zea mays L.) plant tissue (grain and leaf) were obtained from the University of Illinois South Farm plots and from the University of Illinois Morrow plots. Soil samples were also obtained from each of the South Farm plots. The 15 N: 14 N ratio of the nitrogen in these corn plants is shown to be sensitive to the source of nitrogen taken up by the plants. A systematic decline in δ 15 N (per mill excess 15 N) was observed within a narrow range of variation (about 4 δ 15 N units) with increasing applications of commercial nitrogen fertilizer. This result is consistent with increasing contributions of fertilizer nitrogen to the plant, as the fertilizer had a δ 15 N value close to zero. Similarly, the influence of a small amount of manure nitrogen (40 kg nitrogen/ha) applied over many years was detected in samples grown on the University of Illinois' historic Morrow plots. The results indicate that the nitrogen of grain and the leaf tissue of young plants is derived at least in part from different pools reflecting different proportions of fertilizer and soil nitrogen or fertilizer nitrogen of different δ 15 N, due to the time course of its fractionation. Unexplained differences between the influence of soybeans and clover on δ 15 N were also observed. Neither the quantity nor the δ 15 N of the total nitrogen was influenced by short term (3 years) addition of large quantities of nitrogen (448 kg/ha) to the soil on the South Farm plots. A relatively high value of δ 15 N was obtained for NO 3 ‐ in the soil profile in the fall following spring application of 448 kg nitrogen/ha. This suggests that the observed nitrate nitrogen was not derived from nitrogen molecules applied as fertilizer in the spring, but originated rather from the exchange of fertilizer nitrogen for soil nitrogen and/or the “priming effect” (release of extra soil nitrogen as a result of the application of fertilizer nitrogen).
    Type of Medium: Online Resource
    ISSN: 0361-5995 , 1435-0661
    URL: Article
    DOI: 10.2136/sssaj1973.03615995003700060028x
    RVK:
    RA 4845
    Language: English
    Publisher: Wiley
    Publication Date: 1973
    detail.hit.zdb_id: 241415-6
    detail.hit.zdb_id: 2239747-4
    detail.hit.zdb_id: 196788-5
    detail.hit.zdb_id: 1481691-X
    SSG: 13
    SSG: 21
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...