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  • 11
    Electronic Resource
    Electronic Resource
    Effects of flooding on rooting and sprouting of isolated stem segments and on plant growth of Paspalum distichum L. (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 29 (1989), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary. Bud sprouting, shoot height, and fresh and dry weights of plants arising from single-node stem segments of Paspalum distichum L. decreased as the depth of burial in the soil increased. Sprouting, rooting and shoot growth of single-node segments submerged in 5–15 cm of water were reduced significantly in the dark. Light alleviated this water-induced reduction in 1-, 3- and 7-node segments. Submergence actually promoted sprouting of the proximal bud and shoot growth from the distal bud in 3-node segments, and shoot growth of the first two buds from the distal end in 7-node segments, Flooding the roots of 3-week -old plants for one month had no effect, but markedly reduced tiller production and dry weights after 2 and 3 months. Treatment at 100% relative humidity promoted new shoot production in 4-month old plants only if all shoots were decapitated (clipped) but not in plants with 6 shoots left intact. Submergence of the whole plant in water drastically reduced new shoot production regardless of clipping treatment. Effects of flooding varied with its duration. It is concluded that though P. distichum, a wetland perennial weed, survives root flooding and submergence conditions, these conditions do not support maximum growth of the plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1989.tb01303.x
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  • 12
    Electronic Resource
    Electronic Resource
    Apical dominance in the shoot and its possible rôle in the survival of Paspalum distichum L. (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 29 (1989), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary. When sequential single-node shoot segments (third to fifteenth node, counting from the apex) of the perennial grass weed Paspalum distichum L. were buried in soil, new shoot growth was significantly correlated with initial segment length. Growth from the youngest segment (third), which was about 2 cm long, was only half as great as that from segments 8 to 15, which were initially 2–3·5 times longer. When 14-node shoot segments were buried in soil, the apical bud exerted a dominating influence on shoot emergence and new shoot growth of axillary buds. The degree of suppression increased gradually up to node 8 and then decreased as the distance from the apex increased. A similar result was obtained in these shoot segments following decapitation. However, the degrees and patterns of apical and bud dominance varied in shoots collected during different seasons and also in shoots with different node numbers, node position, cutting and chilling treatments. A possible role of apical and bud dominance in P. distichum in keeping aerial shocks in reserve under adverse conditions, thus providing a survival mechanism for this weed, is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1989.tb01302.x
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  • 13
    Electronic Resource
    Electronic Resource
    Mechanical strain enhances proteoglycan message in fibroblasts from asthmatic subjects (2004)
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 34 (2004), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Remodelling of the asthmatic airway includes increased deposition of proteoglycan (PG) molecules. One of the stimuli driving airway remodelling may be excessive mechanical stimulation.Objective We hypothesized that fibroblasts from asthmatic patients would respond to excessive mechanical strain with up-regulation of message for PGs.Methods We obtained fibroblasts from asthmatic patients (AF) and normal volunteers (NF) using endobronchial biopsy. Cells were maintained in culture until the fifth passage and then grown on a flexible collagen-coated membrane. Using the Flexercell device, cells were then subjected to cyclic stretch at 30% amplitude at 1 Hz for 24 h. Control cells were unstrained. Total RNA was extracted from the cell layer and quantitative RT-PCR performed for decorin, lumican and versican mRNA.Results In unstrained cells, the expression of decorin mRNA was greater in AF than NF. With strain, NF showed increased expression of versican mRNA and AF showed increased expression of versican and decorin mRNA. The relative increase in versican mRNA expression with strain was greater in AF than NF.Conclusions These data support the hypothesis that proteoglycan message is increased in asthmatic fibroblasts subject to mechanical strain. This finding has implications for the mechanisms governing airway wall remodelling in asthma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.2004.01980.x
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  • 14
    Electronic Resource
    Electronic Resource
    Immunohistochemical analysis of Th1/Th2 cytokine profiles and androgen receptor expression in the pathogenesis of nifedipine-induced gingival overgrowth (2003)
    Oxford, UK : Munksgaard International Publishers
    Journal of periodontal research 38 (2003), S. 0 
    Details
    ISSN: 1600-0765
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background:  Numerous studies have demonstrated that gingival overgrowth may be associated with androgen and cytokine expression in tissues.Objectives:  The aim of this study was to compare the expression of androgen receptor-presenting cells (AR+ cells) and Th1/Th2 cytokine [Th1: interleukin (IL)-2, interferon-γ (IFN-γ); Th2: IL-4, IL-10, IL-13] expression cells in tissue sections of patients with gingival overgrowth.Materials and methods:  Tissue samples were collected from patients with healthy periodontium (H group), adult periodontitis (P group), surgically extracted teeth (S group), and nifedipine-induced gingival overgrowth (NIGO group). The clinical periodontal parameters of pocket depth (PD), bleeding on probing (BOP), and plaque control record (PCR) were measured around selected sample teeth. Gingival biopsies were further processed by immunohistochemical staining method. The expressions of cells positive for AR, IL-2, IFN-γ, IL-4, IL-10, and IL-13 were counted by predetermined semiquantitative methods.Results:  Our results indicated that AR, IL-2, IFN-γ, IL-4, IL-10, and IL-13 were intensively expressed in the nuclei of inflammatory cells and fibroblasts of gingival connective tissue. Stronger expressions of AR, IL-2, and IFN-γ were found in the NIGO group. The AR+ cells/0.01 mm2 in gingival fibroblasts were significantly higher in the NIGO group (80.2 ± 10.7) than those of the periodontitis group (52.5 ± 11.8) and control group (37.4 ± 11.3) (P 〈 0.05). The cytokine expression of the NIGO group showed a trend towards Th1-type expression (IL-2; P = 0.0001). In the surgically extracted tooth group, a stronger expression of Th2-type cytokine (IL-4, Il-10, IL-13; P 〈 0.05) was found in inflammatory cells. In a comparison of the IL-2/IL-4-labeled cell ratio of the four groups, a descending sequence was discovered as NIGO group (0.92 ± 0.97) 〉 H group (0.81 ± 0.61) 〉 P group (0.77 ± 0.82) 〉 S group (0.58 ± 1.77).Conclusions:  Our data support the following: (i) taking nifedipine may elevate the expression of AR in susceptible oral tissue, e.g. gingiva; (ii) the cytokine profile of T-cells in NIGO tissue indicates a trend preferentially towards Th1 activity; and (iii) elevation of AR expression cells and prominent Th1 cytokine-labeled cells are two significant factors in the pathogenesis of NIGO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0765.2003.00672.x
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  • 15
    Electronic Resource
    Electronic Resource
    Refinement of a locus for Marie Unna hereditary hypotrichosis to a 1·1-cM interval at 8p21.3 (2004)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 150 (2004), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Marie Unna hereditary hypotrichosis (MUHH) is a rare autosomal congenital alopecia with progressive hair loss starting in early childhood and accelerating at puberty. A locus for MUHH has been mapped on chromosome 8p21 but no genes for MUHH have been identified to date.Objectives  To refine the MUHH locus to a narrow chromosome region to facilitate cloning of the gene.Methods  We performed genotyping and linkage analysis in a multigeneration Chinese family with MUHH, using 18 high-density microsatellite markers spanning the previously mapped interval at 8p21.Results  Significant evidence for linkage was observed in this region, with a maximum two-point LOD score of 3·01 (θ = 0). Haplotype analysis localized the MUHH locus within the region defined by D8S282 and D8S1839. This region overlaps by 1·1-cM with the previously reported MUHH region and represents a physical distance of about 380 kb.Conclusions  This study provides a refined map location (1·1 cM) for isolation of the gene causing MUHH. These data also indicate the existence of a common MUHH locus at 8p21.3 between affected caucasian and Chinese families.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2004.05913.x
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  • 16
    Electronic Resource
    Electronic Resource
    Refined localization of dyschromatosis symmetrica hereditaria gene to a 9·4-cM region at 1q21–22 and a literature review of 136 cases reported in China (2004)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 150 (2004), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Dyschromatosis symmetrica hereditaria (DSH) is an autosomal dominant pigmentary genodermatosis characterized by hyperpigmented and hypopigmented macules on the extremities, which has recently been mapped to an 11·6-cM interval on chromosome 1q11–21. So far, most cases of DSH have been reported in Japan and dermatologists around the world might think this disorder mainly occurs in Japan. In fact, there are 17 DSH families including 136 cases reported in China since 1980, but most of them are described in Chinese.Objectives  To refine the previously mapped region that facilitates the identification of the DSH gene and to delineate the clinical and genetic features of Chinese DSH cases by a literature review of 136 cases reported in China.Methods  We performed genotyping and linkage analysis using polymorphic microsatellite markers at 1q11–22 in two Chinese DSH families, and reviewed all of the DSH cases reported in China since 1980.Results  A cumulative maximum two-point lod score of 3·68 was produced with marker D1S506 at a recombination frequency of θ = 0·00 in these two families. Haplotype analysis refined the DSH locus to a 9·4-cM interval flanked by D1S2343 and D1S2635. The genetic and clinical features of Chinese cases with DSH were summarized. In some Chinese cases, hyperpigmented and hypopigmented macules were scattered on the neck and chest, but among Japanese patients there were no similar skin lesions to be reported on these sites.Conclusions  This study confirms linkage of DSH to a previously mapped region and refines the DSH gene to a 9·4-cM interval at 1q21–22. Likewise, the literature review indicates that DSH is not an uncommon disorder in China and the differences in the distribution of skin lesions could be related to race and environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0007-0963.2004.05861.x
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  • 17
    Electronic Resource
    Electronic Resource
    Earliest presence of humans in northeast Asia (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 413 (2001), S. 413-417 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The timing of the earliest habitation and oldest stone technologies in different regions of the world remains a contentious topic in the study of human evolution. Here we contribute to this debate with detailed magnetostratigraphic results on two exposed parallel sections of lacustrine ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35096551
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  • 18
    Electronic Resource
    Electronic Resource
    Parts Feeding on a Conveyor with a One Joint Robot (2000)
    Springer
    Algorithmica 26 (2000), S. 313-344 
    Details
    ISSN: 1432-0541
    Keywords: Key words. Robotics, Manipulation, Mechanics, Planning, Minimalism, Automation, Manufacturing, Parts feeding.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. This paper explores a method of manipulating a planar rigid part on a conveyor belt using a robot with just one joint. This approach has the potential of offering a simple and flexible method for feeding parts in industrial automation applications. In this paper we develop a model of this system and of a variation which requires no sensing. We have been able to characterize these systems and to prove that they can serve as parts feeding devices for planar polygonal parts. We present the planners for these systems and describe our implementations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004539910016
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  • 19
    Electronic Resource
    Electronic Resource
    Analysis of non-conducting powders by direct current glow discharge atomic emission spectrometry and application to the determination of rare earth elements (2000)
    Springer
    Fresenius' journal of analytical chemistry 366 (2000), S. 36-40 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Some characteristics for the analysis of non-conducting powders by direct current glow discharge atomic emission spectroscopy (dc-GD-AES) were investigated. Copper powder was chosen as a suitable host conducting material for the analysis of mixtures of rare earth oxides. The influences of sample preparation and discharge parameters on the sputtering rate, discharge stability and emission intensity of the analyte were investigated systematically. The sample-to-sample reproducibility was discussed, and the average RSDs were in the range from 4% to 5%. The proposed method was applied to the analysis of a mixture of rare earth oxides and the results obtained were in good agreement with those obtained by ICP-AES.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050008
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  • 20
    Electronic Resource
    Electronic Resource
    Separation and preconcentration combined with glow discharge atomic emission spectrometry for the determination of rare earth elements (La, Nd, Eu, Dy, Y) in geological samples (2000)
    Springer
    Fresenius' journal of analytical chemistry 367 (2000), S. 254-258 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A method of glow discharge atomic emission spectroscopy (GD-AES) is described for the determination of rare earth elements (REEs) after separation and preconcentration by micro-column packed with immobilized 1-phenyl-3-methyl-4-benzoyl-5-pyrazone (PMBP) on microcrystalline naphthalene. The graphite electrode with solution residue on its surface was used as a cathode. Various factors (the form of cathode, working condition) influencing the determination of the analytes were studied in detail. Under the experimental conditions selected, the detection limits for the determination of La, Nd, Eu, Dy and Y are 0.24, 0.32, 0.01, 0.07 and 0.06 μg/mL, respectively, with relative standard deviations (RSDs) in the range of 5–10%. The method was applied to determine La, Nd, Eu, Dy and Y in geological samples, and the analytical results are in good agreement with the reference values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160000331
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