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  • Springer  (108)
  • Cambridge University Press  (2)
  • 2005-2009  (20)
  • 1995-1999  (60)
  • 1990-1994  (30)
  • 1
    Electronic Resource
    Electronic Resource
    Linkage analysis of a fertility restoring mutant generated from CMS rice (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 261-266 
    Details
    ISSN: 1432-2242
    Keywords: Key words Rice (Oryza sativa. L) ; CMS ; Fertile revertant ; Restorer gene ; RAPD marker ; Mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  DNA polymorphism between a cytoplasmic male-sterile rice line II-32A, the male-fertile maintainer counterpart II-32B, a fertile revertant (T24), as well as two commercial indica restorers, was analyzed with randomly amplified polymorphic DNA (RAPD). A very low degree of polymorphism was found between the revertant T24 and II-32A compared with that of indica rice varieties. This result, together with agronomic and genetic evidence, suggests the revertant to be a product of a nuclear mutation. An analysis of polymorphism between II-32A and the revertant T24 with 510 RAPD decamer primers identified the co-segregating markers OPB07640 and OPB181000 to be linked to a sterile allele of the restoring locus in the revertant T24, at a distance of 5.3 cM. RAPD analysis of a mapping population of Tesanai2/CB with primer OPB07 revealed linkage of OPB07640 with RG374 (10.8 cM) and RG394 (8.8 cM) on chromosome 1. Thus the restorer gene, designated Rf 5, was tentatively localized between RG374 and RG394 on chromosome 1 and appears to be independent of other mapped restorer genes in rice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050894
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  • 2
    Electronic Resource
    Electronic Resource
    Calcitonin Provides Complete Protection Against Cancellous Bone Loss in the Femoral Neck of Ovariectomized Rats (1997)
    Springer
    Calcified tissue international 60 (1997), S. 457 -461 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Cancellous bone — Histomorphometry — Calcitonin — Femoral neck — Ovariectomy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. Calcitonin (CT) has been found to partially prevent cancellous bone loss in the proximal tibia of ovariectomized (OVX) rats. The current study was designed to determine whether CT has similar bone protective effects in the femoral neck, a skeletal site with a slower rate of bone loss after ovariectomy than the proximal tibia. Female Sprague Dawley rats were sham-operated or ovariectomized at 3 months of age. Groups of OVX rats were injected s.c. with vehicle or CT at a dose of 16 U/kg body weight on alternate days for 30, 60, or 90 days. Sham-operated control rats were treated with vehicle alone on alternate days. The proximal femur from each rat was processed undecalcified for quantitative bone histomorphometry. Cancellous bone volume in the femoral neck of vehicle-treated OVX rats was significantly less than that of vehicle-treated control rats at all time points. This cancellous osteopenia induced by ovariectomy was associated with increased indices of bone turnover such as osteoclast surface, osteoblast surface, and bone formation rate (tissue level, total surface referent). In contrast, cancellous bone volume in the femoral neck of CT-treated OVX rats was nearly identical of that of vehicle-treated control rats throughout the study. In addition, CT treatment of OVX rats decreased all indices of bone turnover to near the level of vehicle-treated control rats. The results indicate that CT treatment depresses bone turnover and provides complete protection against moderate cancellous osteopenia in the femoral neck of OVX rats. Since previous studies have shown that CT only partially protects against more pronounced cancellous bone loss in the proximal tibia of OVX rats, our findings suggest that CT has a greater bone protective effect at a skeletal site with a slower rate of cancellous bone loss (femoral neck) than at a skeletal site with a rapid rate of cancellous bone loss (proximal tibia).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900262
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  • 3
    Electronic Resource
    Electronic Resource
    On various classes of harmonic maps (1995)
    Springer
    Archiv der Mathematik 64 (1995), S. 353-358 
    Details
    ISSN: 1420-8938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01198092
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  • 4
    Electronic Resource
    Electronic Resource
    In Vitro Cytotoxicity of BTEX Metabolites in Hela Cells (1998)
    Springer
    Archives of environmental contamination and toxicology 34 (1998), S. 229-234 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. Fuel leakage from underground storage tanks is a major source of groundwater contamination. Although the toxicity of regulated compounds such as benzene, toluene, ethylbenzene, and xylene (BTEX) are well recognized, the cytotoxicity of their metabolites has not been studied extensively. In this study, Hela cells, propagated at 37°C in an atmosphere of 5% CO2–95% air, served as a target for evaluation of cytotoxicity of BTEX metabolites 3-methylcatechol, 4-methylcatechol, 4-hydroxybenzoic acid, and 4-hydroxy-3-methoxybenzoic acid. The cells were exposed to different concentrations of the metabolites, which subsequently showed inhibition of cell growth and produced dose-related decreases in cell viability and cell protein content. The BTEX metabolites affected the levels of the polyamines spermidine, spermine, and putrescine, which are known to be important in cell proliferation. The cytotoxic effects for these BTEX metabolites to Hela cells were 3-methylcatechol 〉 4-methylcatechol 〉 4-hydroxy-3-methoxybenzoic acid 〉 4-hydroxybenzoic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449900310
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  • 5
    Electronic Resource
    Electronic Resource
    Nonlinear optical studies of surfaces (1994)
    Springer
    Applied physics 59 (1994), S. 541-543 
    Details
    ISSN: 1432-0630
    Keywords: 42.65.−k
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A brief overview on second-harmonic generation and sum-frequency generation as surface analytical tools is given with a discussion on the intrinsic limitations of the techniques often encountered in the applications. The possibly of using nonlinear optical processes for surface studies has attracted increasing attention in recent years. Optical Second-Harmonic Generation (SHG) and Sum-Frequency Generation (SFG), in particular, have been well accepted as viable surface probes [1]. They have many advantages over the conventional techniques. By nature, they are highly surface-specific and has a submonolayer sensitivity. As coherent optical processes, they are capable of in-situ probing of surface in hostile environment as well as applicable to all interfaces accessible by light. With ultrafast pump-laser pulses, they can be employed to study surface-dynamic processes with a subpicosecond time resolution. These advantages have opened the door to many exciting research opportunities in surface science and technology. This paper gives a brief overview of this fast-growing new area of research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348272
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  • 6
    Electronic Resource
    Electronic Resource
    Photoacoustic investigation of resonance absorption on corrugated surfaces (1996)
    Springer
    Applied physics 62 (1996), S. 263-268 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 78.20. ; e; 41.20. ; q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract.  The PhotoAcoustic (PA) method has been used to study the optical resonance absorptions on corrugated surfaces. The resonance absorptions due to the excitations of surface plasmons and guide-waves of corrugated surfaces have been measured experimentally, and the effects of the groove depth and period of the corrugated surface on the absorption curve have been observed. Moreover, the differential method based on the rigorous use of electromagnetic theory is used to calculate the parameters of the grooves and the optical absorptivities of the samples. The theoretical results on the resonance absorption peaks are in good agreement with those of the PA experiments. Then, the parameters of the grooves can be estimated by the PA investigations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01575092
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  • 7
    Electronic Resource
    Electronic Resource
    Photoacoustic investigation of resonance absorption on corrugated surfaces (1996)
    Springer
    Applied physics 62 (1996), S. 263-268 
    Details
    ISSN: 1432-0630
    Keywords: 78.20. — e ; 41.20. — q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The PhotoAcoustic (PA) method has been used to study the optical resonance absorptions on corrugated surfaces. The resonance absorptions due to the excitations of surface plasmons and guide-waves of corrugated surfaces have been measured experimentally, and the effects of the groove depth and period of the corrugated surface on the absorption curve have been observed. Moreover, the differential method based on the rigorous use of electromagnetic theory is used to calculate the parameters of the grooves and the optical absorptivities of the samples. The theoretical results on the resonance absorption peaks are in good agreement with those of the PA experiments. Then, the parameters of the grooves can be estimated by the PA investigations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01575092
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  • 8
    Electronic Resource
    Electronic Resource
    Na+, K+-ATPase, glutathione, and hydroxyl free radicals in cadmium chloride-induced testicular toxicity in mice (1995)
    Springer
    Archives of environmental contamination and toxicology 29 (1995), S. 174-179 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Cadmium chloride (CdCl2)-induced biochemical changes were characterized in male, CD-1 mouse testes. CdCl2 inhibited the testes microsomal Na–, K–-ATPase activity in vitro and in vivo. The inhibitory range was 30–50 μm and the concentration for half maximal inhibition (IC50 value) was 90 μm over 5 min preincubation. CdCl2 (2mg/kg/day, s.c.) for 2 days significantly inhibited testes Na–, K–-ATPase (near 90% inhibition). The content of testicular GSH and the ratio of reduced glutathione (GSH)/GSSG (oxidized glutathione) decreased in CdCl2-treated groups. Using salicylate as a trapping agent and high pressure liquid chromatography with electrochemical detection (LCED), we measured the OH production in vivo. 2,5-dihydroxybenzoic acid (2,5-DHBA) and 2,3-dihydroxybenzoic acid (2,3-DHBA) as indices of hydroxyl free radical formation significantly increased after 5 days CdCl2 exposure. Pretreatment with vitamin E (20 mg/kg, s.i.d., i.m., 7d) protected CdCl2-induced increase in OH generation in testes. From this study, it was demonstrated that CdCl2 induced testicular toxicity could possibly be mediated by a significant increase in hydroxyl free radical formation and a reduction in GSH content and Na–, K–-ATPase activity. Vitamin E seems to prevent the CdCl2 induced increase in hydroxyl free radical generation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212967
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  • 9
    Electronic Resource
    Electronic Resource
    Computer simulation and analysis of fountain flow in filling process of injection molding (1994)
    Springer
    Journal of polymer research 1 (1994), S. 163-173 
    Details
    ISSN: 1572-8935
    Keywords: Fourtain flow ; Injection mold filling ; Finite element method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The viscous flow in the filling stage of injection molding can be described in terms of an one-dimensional fully developed main flow and a complex two-dimensional flow near the advancing front, which is often termed the ”fountain flow“. The transport characteristics in the front region of the mold flow are of increasing importance in injection process of composite materials such as resin injection molding (RIM). By using of finite element method, the simulation of non-isothermal viscous flow between two isothermal parallel plates with the generalized newtonian fluid is presented in detail. The ”un-folding” of the fluid particles towards the mold wall directly affects transport characteristics such as the distribution of temperature, the orientation and the concentration of molecule near the front in filling stage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01374091
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  • 10
    Electronic Resource
    Electronic Resource
    Yield enhancement and manufacturing throughput of redundant memories by repairability/unrepairability detection (1990)
    Springer
    Journal of electronic testing 1 (1990), S. 43-57 
    Details
    ISSN: 1573-0727
    Keywords: diagnosis ; redundant memory ; repair ; WSI ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract In this article, yield enhancement and manufacturing throughput of large repairable memories are analyzed. These objectives are met by repairability/unrepairability detection. Initially two new techniques for detection of memory chips with redundancy are presented. Initially, a heuristic, yet efficient approach is proposed. This first approach is based on finding a very good approximation to the minimum covering set. An algorithm, which executes in quadratic time with respect to the largest dimension of the memory, is presented. This algorithm is executed off-line, that is, when the memory has been fully diagnosed. New conditions for detection are presented and fully analyzed. These are based on a more accurate estimation of the regions of repairability and unrepairability. Hence, this results in a reduction of the uncertainty region, where the status of a memory cannot be established without executing a fully exhaustive search algorithm. The second approach to repairability/unrepairability detection is based on a more complex covering relationship, namely the generalized leading element. A model for manufacturing throughput of large repairable memories is presented. A new repair algorithm which utilizes a ternary tree approach, is also presented. This repair algorithm is perfect in the sense that it finds the optimal repair-solution (whenever one exists) after the memory has not been diagnosed unrepairable. Illustrative examples and simulation results show that considerable improvements for average and the worst-case analysis over existing techniques can be achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00134014
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