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  • 1
    Electronic Resource
    Electronic Resource
    Intracellular cyanobiont Richelia intracellularis: ultrastructure and immuno-localisation of phycoerythrin, nitrogenase, Rubisco and glutamine synthetase (1995)
    Springer
    Marine biology 124 (1995), S. 1-8 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In marine tropical or subtropical plankton the filamentous, heterocyst-forming cyanobacterium Richelia intracellularis forms a symbiosis with the diatom Rhizosolenia clevei. An ultrastructural analysis of the apex of Rhizosolenia clevei showed that the cytoplasm in that particular part of the cell was present only where the cyanobiont was located. The cyanobiont was, however, always outside the host cytoplasm. Vegetative cells as well as the heterocysts of the cyanobiont were devoid of gas vesicles and cyanophycin granules, while carboxysomes and large glycogen granules were common. The cyanobacterial cell wall apparently remained intact in both vegetative and heterocyst cells. In green excitation light the heterocysts and vegetative cells emitted a bright yellow fluorescence, indicating that both cell types possessed high concentrations of the pigment phycoerythrin (PE) commonly associated with photosystem (PS) II. The presence of this pigment in both cell types was verified by immunogold localisation. Using the same technique, the nitrogenase (dinitrogenase reductase) enzyme was shown to be exclusively present in the heterocysts, while Rubisco was localised primarily to the carboxy-somes, which were only detected in vegetative cells. Using an antiserum against the ammonia assimilating enzyme glutamine synthetase (GS), we could demonstrate very low levels of this enzyme, indicating repression of GS in the cyanobiont.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349140
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  • 2
    Electronic Resource
    Electronic Resource
    The structure of SrZn2 (1964)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 17 (1964), S. 65-66 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X64000184
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  • 3
    Electronic Resource
    Electronic Resource
    Criminality and Morbidity in Young Victims of Firearm Injuries: A Follow-up Study (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 794 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb32534.x
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  • 4
    Electronic Resource
    Electronic Resource
    Inhibition of cell division blocks the synthesis of the second nitrogenase (Nif2) in the cyanobacterium Anabaena variabilis (2003)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 219 (2003), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Anabaena variabilis ATCC 29413 belongs to the cyanobacteria that use a specific cell type, heterocysts, for fixation of atmospheric nitrogen under aerobic conditions. Nitrogen fixation under anaerobic conditions is catalyzed by a Mo-dependent nitrogenase (Nif2) that is expressed in the vegetative cells. We demonstrate here using immunolocalization/light microscopy (LM) that the synthesis of NifH2 is mainly initiated in dividing vegetative cells along the trichomes. Blocking cell division by cephalexin abolished nitrogenase synthesis under anaerobic conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0378-1097(03)00020-X
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  • 5
    Electronic Resource
    Electronic Resource
    Tissue accumulation of nickel released due to electrochemical corrosion of non-precious dental casting alloys (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 7 (1980), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Specimens of four non-precious dental casting alloys intended for use in the ceramicmetal technique were implanted subcutaneously in the neck region of mice. The animals were killed after 5 months. Organs and tissues were tested as regards the concentration of nickel by means of atomic absorption spectrophotometry. The study showed that due to electrochemical corrosion nickel was released from implants and accumulated in some tissues and organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1980.tb00451.x
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  • 6
    Electronic Resource
    Electronic Resource
    The distribution of nickel in mice. (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 7 (1980), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Metallic restorations are corroded in the oral environment. Corrosion products penetrate into the tissues and are distributed thssroughout the body seeking certain organs and tissues as targets.The distribution patterns of nickel in albino mice were studied autoradiographically at various periods after an intravenous injection of 63Ni in order to locate the target organs and tissues of nickel.Wth short survival periods the highest uptake of 63Ni was found in the blood, kidney, urinary bladder, lung, eye and hair follicles. With long survival periods, 3 weeks, the distribution pattern was dominated by high uptake in the lung tissues, central nervous system, kidneys, hard tissues and skin.The distribution pattern in brown mice was similar to that in albino mice. However, the concentration in the eye and the skin was more pronounced. The importance of release of nickel from nickel containing dental alloys in nickel allergic patients is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1980.tb00450.x
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  • 7
    Electronic Resource
    Electronic Resource
    A 25 year longitudinal study of patients treated with removable partial dentures (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 22 (1995), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary A 25 year longitudinal study was carried out on a number of patients fitted with removable partial dentures (RPDs) in 1969. Before the prosthetic treatment all patients were given oral hygiene motivation and instructions in order to create a high level of co-operation. The RPDs, most of which were lower bilateral distal extension dentures, were carefully planned and designed. During the first 10 years the patients were examined in our clinic at yearly intervals at which time encouragement and reinstruction regarding oral hygiene were given and various treatment procedures were performed as required. After the initial 10 years the patients were advised, for practical reasons, to continue to have yearly controls on their own initiative. Of the initial 30 patients from 1969, 23 were still alive in 1994, all of whom were examined. In five of those 23 the original RPD situation had changed more or less due mainly to general illness contracted and/or change to other therapies. In the remaining 18 patients wearing in total 20 RPDs, 13 (65%) of the original RPDs were still functioning. Seven RPDs were new with principally the same design as the original ones. Among these 18 patients the number of lost teeth, the number of new DF surfaces and the increased number of endodontically treated teeth were few. No apparent changes took place regarding the periodontal condition during the follow-up period. These favourable biological conditions in the RPD jaws, in combination with the patients' satisfaction with the comfort and chewing ability, reinforce the conclusions drawn at our 10 year control – that an RPD is a valuable treatment procedure for patients with a markedly reduced number of teeth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1995.tb01055.x
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  • 8
    Electronic Resource
    Electronic Resource
    Cisapride in the treatment of post-operative ileus (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 5 (1991), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The effect of cisapride on duration of post-operative ileus after surgery was investigated in a randomized, double-blind, placebo-controlled study. Patients undergoing elective upper gastrointestinal (n= 47) or colonic (n= 22) surgery were pre-operatively randomly allocated to treatment with either cisapride 30 mg t.d.s., by rectal administration, or placebo. Treatment started exactly 48 h after surgery if the patient at this time had not passed stool. Time to passage of first stool after surgery was estimated.Mean time to passage of stool was 85 (32) h (s.d.) for cisapridetreated and 91 (43) h for placebo-treated patients. No difference between the treatment groups was noted.Treatment with cisapride did not shorten the duration of postoperative ileus after either upper gastrointestinal or colonic surgery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.1991.tb00519.x
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  • 9
    Electronic Resource
    Electronic Resource
    Some characteristics of malate dehydrogenase of the blue-green alga Nostoc muscorum
    Amsterdam : Elsevier
    Plant Science Letters 16 (1979), S. 189-194 
    Details
    ISSN: 0304-4211
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4211(79)90027-0
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  • 10
    Electronic Resource
    Electronic Resource
    20 Inhibitory effects of oestrogens on prostatic blood flow in the rat
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 19 (1983), S. 7 
    Details
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-4731(83)91520-0
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