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1

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Gram-positive bacterial flora on the root surface of wheat (Triticum aestivum L.) grown under different soil conditions (1996)

Sato, K. ; Jiang, H.-Y.

Springer

Biology and fertility of soils 23 (1996), S. 121-125

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ISSN: 1432-0789

Keywords: Key words Wheat ; Rhizosphere ; Soil Microflora ; Gram-positive Bacteria ; Coryneform Bacteria ; Arthrobacter spp. ; Mol% G+C ; Diaminopimelic acid ; DAP

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract We identified 108 Gram-positive bacterial strains isolated from the root surface of wheat grown under different soil conditions. The strains were divided into four groups based on morphological and physiological characteristics, but most appeared to be coryneform. The taxonomic position of the various groups was verified by the guanine+cytosine DNA contents of the strains. In general, the ranges of these values agreed with those described for the respective taxonomic positions in the literature, with a few exceptions. With soil improvement the distribution of the various groups on the root surface changed, with the coryneform group becoming dominant. This group was further divided into five subgroups, according to cell wall components, cellulose-decomposition, and morphological characteristics, and were identified to genus level. The distribution of these subgroups on the root surface of wheat did not alter with soil improvement. The genus Arthrobacter, the dominant subgroup, predominated in every plot.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00336051

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2

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Improvement of beamline 4B9A and results of an X-ray diffraction experiment (1998)

Wang, D. W. ; Jiang, H. Y. ; Wu, Z. H. ; [et al.]

Chester : International Union of Crystallography (IUCr)

Journal of synchrotron radiation 5 (1998), S. 503-505

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ISSN: 1600-5775

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Geosciences , Physics

Notes: 4B9A is a focusing and monochromatic photon beam at the BSRF, which was constructed in 1990. During the second phase of the BSRF program, the surface of the cylindrical mirror has been coated with Pt, covering the original Ni, and the monochromator has been upgraded. The maximum photon energy extends to 11 keV and the intensity has increased about tenfold with respect to the previous intensity at 6 keV. Synchrotron X-ray diffraction patterns for the Hg-1223 (HgBa2Ca2Cu3O8+δ) superconducting bulk and thin film have been measured at 1.54014 Å. Results indicate that the bulk and film can be indexed as possessing tetragonal symmetry; lattice parameters a = 3.856 Å and c = 15.851 Å for the bulk Hg-1223 compound, and a = 3.8517 Å and c = 15.8511 Å for the film. Their structures are similar.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0909049597014477

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3

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Gram-negative bacterial flora on the root surface of wheat (Triticum aestivum) grown under different soil conditions (1996)

Sato, K. ; Jiang, H. -Y.

Springer

Biology and fertility of soils 23 (1996), S. 273-281

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ISSN: 1432-0789

Keywords: Wheat ; Triticum aestivum ; Rhizosphere ; Soil microflora ; Gram-negative bacteria ; API 20 NE ; Flavobacterium spp ; Cytophaga

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract We identified 161 Gram-negative bacterial strains isolated from the root surface of wheat grown under different soil conditions. The strains were divided into seven groups based on major morphological and physiological properties. Taxonomic allocation of the groups was verified by guanine+cytosine contents of DNA. Except for one group, which may be assumed to include bacteria belonging to the genera Flavobacterium and Cytophaga, the various groups were taxonomically united. The distribution of the groups changed with soil improvement. Pseudomonads predominated in unimproved soil, but Flavobacterium and Cytophaga spp. were predominant in the most improved soil. As all the strains were non-fermentative by Hugh and Leifson's test, API 20NE identification was applied. However, many strains were misidentified by this system, especially in the Flavobacterium and Cytophaga spp. group. For ecological studies, the strains were classified to species level by the API 20 NE system and by the results of a combination of guanine+cytosine (mol%) and isoprenoid quinone data. The pattern of distribution of the bacteria on the root surface of wheat varied at species level within one genus depending on soil conditions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00335955

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4

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Gram-positive bacterial flora on the root surface of wheat (Triticum aestivum L.) grown under different soil conditions (1996)

Sato, K. ; Jiang, H. -Y.

Springer

Biology and fertility of soils 23 (1996), S. 121-125

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ISSN: 1432-0789

Keywords: Wheat ; Rhizosphere ; Soil Microflora ; Gram-positive Bacteria ; Coryneform Bacteria ; Arthrobacter spp. ; Mol% G+C ; Diaminopimelic acid ; DAP

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract We identified 108 Gram-positive bacterial strains isolated from the root surface of wheat grown under different soil conditions. The strains were divided into four groups based on morphological and physiological characteristics, but most appeared to be coryneform. The taxonomic position of the various groups was verified by the guanine+cytosine DNA contents of the strains. In general, the ranges of these values agreed with those described for the respective taxonomic positions in the literature, with a few exceptions. With soil improvement the distribution of the various groups on the root surface changed, with the coryneform group becoming dominant. This group was further divided into five subgroups, according to cell wall components, cellulose-decomposition, and morphological characteristics, and were identified to genus level. The distribution of these subgroups on the root surface of wheat did not alter with soil improvement. The genus Arthrobacter, the dominant subgroup, predominated in every plot.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00336051

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5

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Finite deformation formulation of a shell element for problems of sheet metal forming (1991)

Wang, X. ; Jiang, H. Y. ; Lee, L. H. N.

Springer

Computational mechanics 7 (1991), S. 397-411

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ISSN: 1432-0924

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract An elastic-plastic thin shell finite element suitable for problems of finite deformation in sheet metal forming is formulated. Hill's yield criterion for sheet materials of normal anisotropy is applied. A nonlinear shell theory in a form of an incremental variational principle and a quasi-conforming element technique are employed in the Lagrangian formulation. The shell element fulfills the inter-element C 1 continuity condition in a variational sense and has a sufficient rank to allow finite stretching, rotation and bending of the shell element. The accuracy and efficiency of the finite element formulation are illustrated by numerical examples.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00350168

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6

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On the range sets of variational inequalities (1994)

Qi, L. ; Jiang, H. Y.

Springer

Journal of optimization theory and applications 83 (1994), S. 565-586

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ISSN: 1573-2878

Keywords: Variational inequalities ; range sets ; cones ; polyhedra ; stability

Source: Springer Online Journal Archives 1860-2000

Topics: Mathematics

Notes: Abstract This paper investigates the closedness and convexity of the range sets of the variational inequality (VI) problem defined by an affine mappingM and a nonempty closed convex setK. It is proved that the range set is closed ifK is the union of a polyhedron and a compact convex set. Counterexamples are given such that the range set is not closed even ifK is a simple geometrical figure such as a circular cone or a circular cylinder in a three-dimensional space. Several sufficient conditions for closedness and convexity of the range set are presented. Characterization for the convex hull of the range set is established in the case whereK is a cone, while characterization for the closure of the convex hull of the range set is established in general. Finally, some applications to stability of VI problems are derived.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02207642

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7

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Expression of vascular endothelial growth factor (VEGF) and its receptors during embryonic implantation in the golden hamster (Mesocricetus auratus) (1999)

Yi, X. J. ; Jiang, H. Y. ; Lee, K. K. H. ; [et al.]

Springer

Cell & tissue research 296 (1999), S. 339-349

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ISSN: 1432-0878

Keywords: Key words Vascular endothelial growth factor ; flt-1 ; flk-1 ; Embryonic implantation ; Immunohistochemistry ; In situ hybridization ; Reverse transcription/polymerase chain reaction ; Golden hamster (Mesocricetus auratus)

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Abstract Expression of vascular endothelial growth factor/vascular permeability factor (VEGF/VPF) and its receptors (flt-1 and flk-1) during the peri-implantation period (days 3, 4, 5, 6 and 7 post coitus) in the golden hamster was investigated by in situ hybridization, immunohistochemistry and the reverse transcription/polymerase chain reaction (RT-PCR). Three days after mating, in situ hybridization and immunohistochemical staining revealed weak VEGF expression only in the uterine epithelium; this expression was similar to that seen at oestrus. Flt-1 but no flk-1 immunoreactivity was observed. At day 4, the subepithelial stroma and embryo displayed immunoreactivity for VEGF and flt-1, whereas endothelial cells expressed both flt-1 and flk-1. At day 5, immunoreactivity for both VEGF and its receptors was detected in decidual cells and vascular endothelial cells. Only a few embryonic cells expressed VEGF mRNA but strong signals were noted in decidual cells. The patterns of VEGF and VEGF receptor expression were the same in the day-6 and day-7 embryos and decidua, except for an increase in intensity as development progressed. Based on these findings, we conclude that, in addition to its known actions on endometrial angiogenesis and tissue swelling, VEGF may also facilitate the proliferation and differentiation of the endometrium and help to sustain the avascular embryo during this early stage of development.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s004410051294

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