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  • 1
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    Birkhäuser
    In:  In: The carbonic anhydrases : new horizons. , ed. by Chegwidden, W. R. EXS . Birkhäuser, Basel, pp. 535-546. ISBN 3-7643-5670-7
    Publication Date: 2019-03-06
    Type: Book chapter , NonPeerReviewed
    Format: text
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 40 (1961), S. 196-204 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Using a Knallgas bacterium, Hydrogenomonas facilis, dependence of its CO2-fixing capacity upon the process of Knallgas reaction was investigated under various experimental conditions. 2. The CO2-fixation coupled with the Knallgas reaction occurred strongly in bacterial cells which had been grown autotrophically in an oxyhydrogen atmosphere, while it was almost nil when the bacterium was grown heterotrophically using lactate as carbon source. In both autotrophically and heterotrophically grown cells lactate was found to accelerate the CO2-fixation in air (i. e., in the absence of oxyhydrogen), indicating the utilization of the energy of lactate oxidation for the CO2-fixation. 3. With the autotrophically grown cells, it was demonstrated that by the pre-incubation of cells in an oxyhydrogen atmosphere in the absence of CO2, the cells acquired a capacity of fixing CO2 on being brought in contact with CO2 in nitrogen or in air with cessation of oxyhydrogen reaction. The maximum level of this capacity in question was found to be attained in about 30 minutes of pre-incubation in the oxyhydrogen atmosphere (at 30°). 4. On removal of hydrogen from the gas mixture after a sufficient period of pre-incubation in the oxyhydrogen atmosphere, there occurred a decay in the acquired CO2-fixing capacity, the decay being more rapid in nitrogen atmosphere than in air.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-072X
    Keywords: UV-A ; Hill reaction ; Photoreactivation ; Anacystis nidulans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The dose effect curve for the inhibition of p-benzoquinone Hill reaction revealed that the long-wavelength ultraviolet radiation (320–390 nm, UV-A) cannot completely inactivate this reaction in the cyanobacterium, Anacystis nidulans. The inactivated Hill reaction is photoreactivated by visible light. Relative quantum responsivity curve for photoreactivation shows peaks at around 440, 630 nm and a minimum at around 520 nm. The reactivation is completely inhibited by 10 μM of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU). It is suggested that most part of the photoreactivation is dependent on photosynthetic process. Possible, simultaneous inactivation and reactivation by long-wavelength ultraviolet radiation is suggested as the possible mechanism for inability to cause complete inactivation by the radiation.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-072X
    Keywords: Prochloron ; Carbonic anhydrase ; Chloride inhibition ; Sullonamide inhibition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The prokaryotic algal symbiont of ascidians, Prochloron sp., was found to exhibit carbonic anhydrase activity which is largely associated with the cell surface. This extracellular carbonic anhydrase activity was inhibited, while the intracellular activity was not affected, by chloride or bromide. Acetazolamide and ethoxyzolamide inhibited carbonic anhydrase activity with I50 values of 7×10-4 and 3×10-4M, respectively. These I50 values are similar to those observed for intracellular carbonic anhydrases of Synechococcus sp. PCC7942, Chlamydomonas reinhardii and spinach.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 39 (1986), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Among the microbial phototrophs, those belonging to the cyanobacteria utilize CO2 and HCO−3 for photosynthesis. Some Chlorophyceae mainly take up CO2 in photosynthesis, and others, which have carbonic anhydrase (CA) on their cell surface can utilize HCO−3 as well as CO2. Kinetic studies revealed that most of the HCO−3 is utilized after this ion is converted to CO2 via CA located on the cell surface. Therefore, the actual molecular species which crosses the plasmalemma is mostly free CO2. There is apparent variation in the mode of utilization of dissolved inorganic carbon (DIC) for photosynthesis in microalgae in other classes. The apparent Km(CO2) values for photosynthesis in most microalgae grown in ordinary air (low-CO2 cells) are as low as in terrestrial C4 plants, although the algal cells fix CO2 via the C3 pathway. In contrast, the apparent Km(CO2) values in cells grown on CO2-enriched air (high-CO2 cells) are as high as those in the terrestrial C3 plants. Most low-CO2 cells show low photorespiration; a low CO2 compensation point, low rates of glycolate excretion and no or low O2 inhibition of photosynthesis. These results indicate that the efficiency of DIC utilization for photosynthesis in low-CO2 cells is very high. The activity of CA in low-CO2 cells is higher than that in high-CO2 cells, while no difference has been confirmed in the activities of other photosynthetic enzymes between low- and high-CO2 cells. In addition, low-CO2 cells can accumulate large amounts of DIC internally, indicating the existence of CO2-concentrating mechanisms in these cells. When CA activity or CO2 concentrating ability is reduced by inhibitors or by mutation, the apparent Km(CO2) values for photosynthesis and the rate of photorespiration increased notably. These results indicate that the high efficiency of DIC utilization in low-CO2 cells depends on both CA and a CO2-concentrating mechanism. It is concluded that CA facilitates the diffusion of DIC from outside the cells to the site(s) of the carboxylation reaction and the concentration of DIC is achieved via an active transporter.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 210-211 
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The β-carbonic anhydrase from the red alga Porphyridium purpureum was heterologously expressed, purified and crystallized. The crystals belong to space group P21 (unit-cell parameters a = 63.8, b = 113.9, c = 73.8 Å, β = 104.1°) with two subunits per asymmetric unit and diffract to 2.5 Å resolution.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 188 (1960), S. 873-875 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An autotrophic growth of Streptomyces auto-trophicus was obtained by inoculating an inorganic medium of the following composition with spores or small flakes of fresh growth taken from a culture of the organism grown on an inorganic agar slant. (Composition of the inorganic nutrient medium : 1.22 ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 13 (1966), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Cells of Ochromonas danica were grown under photoautotrophic as well as heterotrophic conditions in the presence of 35SO4=, and the content of sulfolipid was studied using the technics of paper chromatography and paper electrophoresis. Photoauto-trophic cells of O. danica contained 5 to 6 times as much sulfolipid, sulfoquinovosyldiglyceride, as did cells grown under heterotrophic conditions.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 67 (1986), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Cells of Chlorella regularis (Artari) Oltmanns (S-50) were grown under solar radiation in Tokyo, using a newly constructed outdoor culture system. The maximum specific growth rate (log2 unit h−1) was about 0.3, which was a little lower than the highest value reported using artificial light in the laboratory. The near ultraviolet light, consisting mostly of UV-A, inhibited the growth from 10 to 40% in summer mornings; the inhibition was not significant in the afternoon. The percentage inhibition was correlated with the total dose of the ultraviolet radiation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 383 (1996), S. 402-402 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR á€" Chlorophyll d was reported first as a minor, green and magnesium-containing pigment in various species of red macroalgae in 1943 (ref. 1). It was thought by some, however, that chlorophyll d could be an artefact produced by the pigment extraction process, as it is not found ...
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