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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Gerodontology 16 (1999), S. 0 
    ISSN: 1741-2358
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Immobility is common In older people and may impact on their dental care. Immobility in old age may have physical, psychological and environmental causes. Immobile elderly people often suffer from a number of diseases which worsen their mobility. Arthritis, osteoporosis, hip fracture, stroke and Parkinson's disease are among the most common causes of immobility in old age. Complications of immobility such as orthostatic hypotension may occur in the dental patient. Careful history-taking and a thorough physical examination by the physician are the most important parts of the assessment process. This assessment should lead to a list of active problems and treatment should then be aimed at these problems. Active management, carried out by the multidisciplinary team, will lead to improvements in mobility and lessen the frequency and severity of the complications of immobility. This broad description thus provides the basis for a wide understanding for the special problems that the immobile patient present to the practitioner and ways of overcoming the problems.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Animal cognition 2 (1999), S. 103-107 
    ISSN: 1435-9456
    Keywords: Key words Social learning ; Temporal constraints ; Public information ; Rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract It has been proposed that use of socially acquired information by animals should increase as the time available for individual resource sampling decreases. We gave Norway rat “observers” either 2 or 5 h day–1 to sample four foods. Three of these foods were relatively palatable, but protein-poor; the fourth was relatively unpalatable, but protein-rich. We found that observer rats that for 2 h day–1 both sampled foods and interacted with demonstrators eating only the protein-rich food ate more of the protein-rich food than did observers that sampled for 2 h day–1 but had no opportunity to interact with demonstrators. On the other hand, observer rats that could sample foods for 5 h day–1 ate equal amounts of protein-rich food whether they interacted with a demonstrator fed protein-rich food or not. Subsequent analyses showed that the time available to observers to sample foods, rather than the opportunity to interact with demonstrators determined whether such interaction influenced observers’ food choices. The results are consistent with the hypothesis that animals increase their use of public information in response to temporal constraints on opportunities for resource sampling.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2072
    Keywords: Thyrotrophin-releasing hormone ; RX77368 ; Alzheimer's disease ; AMPA ; Septal-hippocampal ; Working memory ; Delayed non-matching to position (DNMTP) ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present study was to determine the effect of a thyrotrophin-releasing hormone (TRH) analogue, RX77368, on performance of a working memory test, using a delayed non-matching to position (DNMTP) procedure, in (RS)-α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-induced septal-hippocampal lesioned rats. Following a postsurgery recovery period, pretrained rats were tested once daily on DNMTP, 30 min post-administration of RX77368 (1.0 mg kg−1, IP) or saline. AMPA-induced lesions significantly reduced percent correct responses during the second week of testing. Comparison of percent correct responses between days 1 and 13 of testing showed that sham rats significantly improved DNMTP performance, whereas lesioned rats did not. RX77368 significantly reduced general locomotor activity in sham rats in activity boxes, but did not disrupt non-mnemonic measures, such as locomotion and motivation, in the DNMTP test. RX77368 increased percent correct responses in AMPA-lesioned rats on days 8–10 and 11–13. There was also a significant improvement in percent correct responses achieved between day 1 and 13 in RX77368-treated lesioned and sham rats. These results showed that: (i) septal-hippocampal lesioned rats did not improve over the testing period; and (ii) on test days when a significant impairment was present, RX77368 partially improved DNMTP performance.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. This study was conducted to ascertain the subacute and reproductive effects in mink (Mustela vison) resulting from exposure to moniliformin, a toxic mycotoxin produced by Fusarium fungi. In a preliminary trial, adult mink were presented diets that contained targeted concentrations of 10, 20, 40, 80, 160, or 240 ppm moniliformin provided by F. fujikuroi culture material (M-1214). The mink fed diets that contained more than 40 ppm moniliformin refused to eat significant quantities of feed. Feeding adult mink diets that contained 8.1 or 17.0 ppm (wet weight) moniliformin, provided by F. fujikuroi culture material, in a 30-day subacute trial produced no significant adverse effects on feed consumption, body weights, hematologic parameters, or serum chemical values, and notable histologic changes in tissues that were examined. In the reproduction trial, female mink were exposed to the same dietary concentrations of moniliformin provided by F. fujikuroi culture material as in the subacute test from 2 weeks prior to the breeding season until their offspring (kits) were 8 weeks old. Consumption of the high-dose (17 ppm) diet resulted in significant neonatal mortality and reduced kit body weights at birth and at 8 weeks of age. Necropsy of 8-week-old kits from the control and high-dose groups revealed no gross or histologic lesions or alterations in liver, lung, or heart tissues that could account for the mortality observed in the kits exposed to the culture material. These results indicate that long-term (105–135 days) dietary exposure to F. fujikuroi culture material containing 17 ppm moniliformin is not lethal to adult female mink, but can have adverse effects on neonatal mink.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2072
    Keywords: Key words Thyrotrophin-releasing hormone ; RX77368 ; Alzheimer’s disease ; AMPA ; Septal-hippocampal ; Working memory ; Delayed non-matching to position (DNMTP) ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present study was to determine the effect of a thyrotrophin-releasing hormone (TRH) analogue, RX77368, on performance of a working memory test, using a delayed non-matching to position (DNMTP) procedure, in (RS)-α-amino-3-hydroxy- 5-methyl-4-isoxazolepropionic acid (AMPA)-induced septal-hippocampal lesioned rats. Following a post-surgery recovery period, pretrained rats were tested once daily on DNMTP, 30 min post-administration of RX77368 (1.0 mg kg–1, IP) or saline. AMPA-induced lesions significantly reduced percent correct responses during the second week of testing. Comparison of percent correct responses between days 1 and 13 of testing showed that sham rats significantly improved DNMTP performance, whereas lesioned rats did not. RX77368 significantly reduced general locomotor activity in sham rats in activity boxes, but did not disrupt non-mnemonic measures, such as locomotion and motivation, in the DNMTP test. RX77368 increased percent correct responses in AMPA-lesioned rats on days 8–10 and 11–13. There was also a significant improvement in percent correct responses achieved between day 1 and 13 in RX77368-treated lesioned and sham rats. These results showed that: (i) septal-hippocampal lesioned rats did not improve over the testing period; and (ii) on test days when a significant impairment was present, RX77368 partially improved DNMTP performance.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Structural and multidisciplinary optimization 10 (1995), S. 222-230 
    ISSN: 1615-1488
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Some of the complications associated with the use of transpedicular screws for spinal fusions include the large diameters of the screws and screw breakagein vivo. Recent advances in multidisciplinary design optimization techniques have provided a unique approach to incorporate the structural, biological, and manufacturing disciplines involved in the design process of spinal screws, allowing the development of smaller and safer transpedicular screws.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of industrial microbiology and biotechnology 16 (1996), S. 354-359 
    ISSN: 1476-5535
    Keywords: supercoiling ; enzymes ; acetone ; butanol ; Clostridium acetobutylicum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Cells ofClostridium acetobutylicum treated with novobiocin, a DNA gyrase inhibitor, produced higher butyrate levels and lower solvent levels with acetone being the most affected. Seven enzyme activities involved in acid and solvent production were analyzed. Among them, only CoA transferase, required for acetone formation and acid uptake, experienced a significant decrease in activity. As inEscherichia coli andBacillus subtilis, DNA fromC. acetobutylicum became less negatively supercoiled in the early stationary phase (solventogenic stage), as shown by analysis of linking number of a reporter plasmid by agarose gel electrophoresis in the presence of chloroquine.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Systematic parasitology 33 (1996), S. 31-32 
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A revised key to avian subgenera ofPlasmodium is presented following the transfer to this genus of the subgenusPlasmodioides Gabaldon, Ulloa & Zerpa, 1985 fromFallisia, a recognised synonym ofPlasmodium.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Systematic parasitology 33 (1996), S. 31-32 
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A revised key to avian subgenera of Plasmodium is presented following the transfer to this genus of the subgenus Plasmodioides Gabaldon, Ulloa & Zerpa, 1985 from Fallisia, a recognised synonym of Plasmodium.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 39 (1998), S. 453-457 
    ISSN: 0021-9304
    Keywords: sclera ; collagen ; piezoelectricity ; dehydration ; sample orientation ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The piezoelectric coefficients (d31) for a number of bovine and human scleral collagen samples were determined as a function of drying time at room temperature. The measured values of d31 decreased with drying time. There were significant differences in the values of the d-coefficient between the human and bovine eyes as well as in the values obtained from different regions of the eye. © 1998 John Wiley & Sons, Inc. J Biomed Mater Res, 39, 453-457, 1998.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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