Irregular Structure

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform

Inkag Hwang - One of the best experts on this subject based on the ideXlab platform.

  • birefringence induced by Irregular Structure in photonic crystal fiber
    Optics Express, 2003
    Co-Authors: Inkag Hwang
    Abstract:

    The unintentional birefringence induced by the Irregular Structure in photonic crystal fibers is analyzed numerically using the plane wave expansion method. The statistical correlations between the birefringence and the various Irregularities are obtained. The birefringence is found to be largely dependent on the fiber design parameters as well as the degree of the Irregularity. And the large pitch and the small air hole make the fiber less sensitive to the structural Irregularity, which is successfully explained by the simple perturbation theory. The accuracy of our analyses is confirmed by the detailed investigation of computational errors. This study provides the essential information for the characterization and the design of low birefringence photonic crystal fibers.

Lyudmila I. Evtushenko - One of the best experts on this subject based on the ideXlab platform.

  • Teichulosonic acid, an anionic polymer of a new class from the cell wall of Actinoplanes utahensis VKM Ac-674(T).
    Biochemistry, 2020
    Co-Authors: A. S. Shashkov, Sofya N Senchenkova, E. M. Tul’skaya, Galina M. Streshinskaya, Yu. I. Kozlova, N. P. Arbatskii, O. V. Bueva, Lyudmila I. Evtushenko
    Abstract:

    The cell wall of Actinoplanes utahensis VKM Ac-674T contains two anionic polymers: teichoic acid 1,3-poly(glycerol phosphate) that is widespread in cell walls of Gram-positive bacteria; and a unique teichulosonic acid belonging to a new class of bioglycans described only in microorganisms of the Actinomycetales order. The latter polymer contains residues of di-N-acyl derivative of sialic acid-like monosaccharide — 5,7-diamino-3,5,7,9-tetradeoxy-L-glycero-β-L-manno-non-2-ulosonic or pseudaminic acid (Pse) which bears the N-(3,4-dihydroxybutanoyl) group (Dhb) at C7. This polymer has Irregular Structure and consists of fragments of two types, which differ in substitution of the Dhb residues at O4 either with β-D-glucopyranose or with β-Pse residues. Most of the β-Pse residues (∼80%) are glycosylated at position 4 with α-D-galactopyranose residues in both types of fragments. The glucose, galactose, and Dhb residues are partly O-acetylated. The Structures of the polymers were established by chemical and NMR spectroscopy methods.

  • Teichulosonic acid, an anionic polymer of a new class from the cell wall of Actinoplanes utahensis VKM Ac-674^T
    Biochemistry (Moscow), 2012
    Co-Authors: A. S. Shashkov, Sofya N Senchenkova, E. M. Tul’skaya, Galina M. Streshinskaya, Yu. I. Kozlova, N. P. Arbatskii, O. V. Bueva, Lyudmila I. Evtushenko
    Abstract:

    The cell wall of Actinoplanes utahensis VKM Ac-674^T contains two anionic polymers: teichoic acid 1,3-poly(glycerol phosphate) that is widespread in cell walls of Gram-positive bacteria; and a unique teichulosonic acid belonging to a new class of bioglycans described only in microorganisms of the Actinomycetales order. The latter polymer contains residues of di-N-acyl derivative of sialic acid-like monosaccharide — 5,7-diamino-3,5,7,9-tetradeoxy-L- glycero -β-L- manno -non-2-ulosonic or pseudaminic acid (Pse) which bears the N-(3,4-dihydroxybutanoyl) group (Dhb) at C7. This polymer has Irregular Structure and consists of fragments of two types, which differ in substitution of the Dhb residues at O4 either with β-D-glucopyranose or with β-Pse residues. Most of the β-Pse residues (∼80%) are glycosylated at position 4 with α-D-galactopyranose residues in both types of fragments. The glucose, galactose, and Dhb residues are partly O-acetylated. The Structures of the polymers were established by chemical and NMR spectroscopy methods.

Kongkarn Kijroongrojana - One of the best experts on this subject based on the ideXlab platform.

  • Effect of bovine and fish gelatin in combination with microbial transglutaminase on gel properties of threadfin bream surimi
    International Aquatic Research, 2012
    Co-Authors: Pimchanok Kaewudom, Soottawat Benjakul, Kongkarn Kijroongrojana
    Abstract:

    Textural property of surimi products is a prime factor in determining the acceptability of consumer as well as market value. Gelatin is one of the most popular biopolymers widely used in food industry as gelling agent with the unique textural properties. Therefore, the addition of gelatin along with the use of protein cross-linkers could be a means to modify the texture of surimi gel, which can fit the demand of consumers. Surimi from the threadfin bream (Nemipterus bleekeri) was added with bovine gelatin (BG) and bovine/fish gelatin mix (BFGM; 1:1, 2:1, 1:2, 4:1, and 1:4) at 10% protein substitution in combination with and without microbial transglutaminase (MTGase) at 1.2 units/g surimi. Textural properties, whiteness, expressible moisture content, protein pattern, and microStructure and sensory properties of gels were determined. When MTGase at 1.2 units/g surimi was incorporated, the increases in breaking force and deformation were noticeable in both surimi gels, with and without 10% BG added ( p < 0.05). On the other hand, surimi gels added with BFGM at all bovine/fish gelatin ratios had the higher breaking force and deformation, compared with that added with BG, when MTGase was incorporated. Addition of BG or BFGM lowered the expressible moisture content and whiteness of surimi gel ( p < 0.05). Based on SDS-PAGE, band intensity of myosin heavy chain and actin of surimi gel decreased when surimi gel was added with all gelatins, regardless of MTGase addition. The microStructure study revealed that surimi gel network became finer and denser with the addition of MTGase (1.2 units/g surimi), but the coarser and Irregular Structure was obtained when gelatin was incorporated. Gelatin, especially bovine/fish gelatin mix, at an appropriate level could be used as the protein additive in surumi gel in conjunction with MTGase in order to improve the textural and nutritive properties of the products.

  • Effect of bovine and fish gelatin in combination with microbial transglutaminase on gel properties of threadfin bream surimi
    International Aquatic Research, 2012
    Co-Authors: Pimchanok Kaewudom, Soottawat Benjakul, Kongkarn Kijroongrojana
    Abstract:

    Textural property of surimi products is a prime factor in determining the acceptability of consumer as well as market value. Gelatin is one of the most popular biopolymers widely used in food industry as gelling agent with the unique textural properties. Therefore, the addition of gelatin along with the use of protein cross- linkers could be a means to modify the texture of surimi gel, which can fit the demand of consumers. Surimi from the threadfin bream (Nemipterus bleekeri) was added with bovine gelatin (BG) and bovine/fish gelatin mix (BFGM; 1:1, 2:1, 1:2, 4:1, and 1:4) at 10% protein substitution in combination with and without microbial transglutaminase (MTGase) at 1.2 units/g surimi. Textural properties, whiteness, expressible moisture content, protein pattern, and microStructure and sensory properties of gels were determined. When MTGase at 1.2 units/g surimi was incorporated, the increases in breaking force and deformation were noticeable in both surimi gels, with and without 10% BG added (p < 0.05). On the other hand, surimi gels added with BFGM at all bovine/fish gelatin ratios had the higher breaking force and deformation, compared with that added with BG, when MTGase was incorporated. Addition of BG or BFGM lowered the expressible moisture content and whiteness of surimi gel (p < 0.05). Based on SDS-PAGE, band intensity of myosin heavy chain and actin of surimi gel decreased when surimi gel was added with all gelatins, regardless of MTGase addition. The microStructure study revealed that surimi gel network became finer and denser with the addition of MTGase (1.2 units/g surimi), but the coarser and Irregular Structure was obtained when gelatin was incorporated. Gelatin, especially bovine/fish gelatin mix, at an appropriate level could be used as the protein additive in surumi gel in conjunction with MTGase in order to improve the textural and nutritive properties of the products. Keywords:

A. S. Shashkov - One of the best experts on this subject based on the ideXlab platform.

  • Teichulosonic acid, an anionic polymer of a new class from the cell wall of Actinoplanes utahensis VKM Ac-674(T).
    Biochemistry, 2020
    Co-Authors: A. S. Shashkov, Sofya N Senchenkova, E. M. Tul’skaya, Galina M. Streshinskaya, Yu. I. Kozlova, N. P. Arbatskii, O. V. Bueva, Lyudmila I. Evtushenko
    Abstract:

    The cell wall of Actinoplanes utahensis VKM Ac-674T contains two anionic polymers: teichoic acid 1,3-poly(glycerol phosphate) that is widespread in cell walls of Gram-positive bacteria; and a unique teichulosonic acid belonging to a new class of bioglycans described only in microorganisms of the Actinomycetales order. The latter polymer contains residues of di-N-acyl derivative of sialic acid-like monosaccharide — 5,7-diamino-3,5,7,9-tetradeoxy-L-glycero-β-L-manno-non-2-ulosonic or pseudaminic acid (Pse) which bears the N-(3,4-dihydroxybutanoyl) group (Dhb) at C7. This polymer has Irregular Structure and consists of fragments of two types, which differ in substitution of the Dhb residues at O4 either with β-D-glucopyranose or with β-Pse residues. Most of the β-Pse residues (∼80%) are glycosylated at position 4 with α-D-galactopyranose residues in both types of fragments. The glucose, galactose, and Dhb residues are partly O-acetylated. The Structures of the polymers were established by chemical and NMR spectroscopy methods.

  • Teichulosonic acid, an anionic polymer of a new class from the cell wall of Actinoplanes utahensis VKM Ac-674^T
    Biochemistry (Moscow), 2012
    Co-Authors: A. S. Shashkov, Sofya N Senchenkova, E. M. Tul’skaya, Galina M. Streshinskaya, Yu. I. Kozlova, N. P. Arbatskii, O. V. Bueva, Lyudmila I. Evtushenko
    Abstract:

    The cell wall of Actinoplanes utahensis VKM Ac-674^T contains two anionic polymers: teichoic acid 1,3-poly(glycerol phosphate) that is widespread in cell walls of Gram-positive bacteria; and a unique teichulosonic acid belonging to a new class of bioglycans described only in microorganisms of the Actinomycetales order. The latter polymer contains residues of di-N-acyl derivative of sialic acid-like monosaccharide — 5,7-diamino-3,5,7,9-tetradeoxy-L- glycero -β-L- manno -non-2-ulosonic or pseudaminic acid (Pse) which bears the N-(3,4-dihydroxybutanoyl) group (Dhb) at C7. This polymer has Irregular Structure and consists of fragments of two types, which differ in substitution of the Dhb residues at O4 either with β-D-glucopyranose or with β-Pse residues. Most of the β-Pse residues (∼80%) are glycosylated at position 4 with α-D-galactopyranose residues in both types of fragments. The glucose, galactose, and Dhb residues are partly O-acetylated. The Structures of the polymers were established by chemical and NMR spectroscopy methods.

Yu. I. Kozlova - One of the best experts on this subject based on the ideXlab platform.

  • Teichulosonic acid, an anionic polymer of a new class from the cell wall of Actinoplanes utahensis VKM Ac-674(T).
    Biochemistry, 2020
    Co-Authors: A. S. Shashkov, Sofya N Senchenkova, E. M. Tul’skaya, Galina M. Streshinskaya, Yu. I. Kozlova, N. P. Arbatskii, O. V. Bueva, Lyudmila I. Evtushenko
    Abstract:

    The cell wall of Actinoplanes utahensis VKM Ac-674T contains two anionic polymers: teichoic acid 1,3-poly(glycerol phosphate) that is widespread in cell walls of Gram-positive bacteria; and a unique teichulosonic acid belonging to a new class of bioglycans described only in microorganisms of the Actinomycetales order. The latter polymer contains residues of di-N-acyl derivative of sialic acid-like monosaccharide — 5,7-diamino-3,5,7,9-tetradeoxy-L-glycero-β-L-manno-non-2-ulosonic or pseudaminic acid (Pse) which bears the N-(3,4-dihydroxybutanoyl) group (Dhb) at C7. This polymer has Irregular Structure and consists of fragments of two types, which differ in substitution of the Dhb residues at O4 either with β-D-glucopyranose or with β-Pse residues. Most of the β-Pse residues (∼80%) are glycosylated at position 4 with α-D-galactopyranose residues in both types of fragments. The glucose, galactose, and Dhb residues are partly O-acetylated. The Structures of the polymers were established by chemical and NMR spectroscopy methods.

  • Teichulosonic acid, an anionic polymer of a new class from the cell wall of Actinoplanes utahensis VKM Ac-674^T
    Biochemistry (Moscow), 2012
    Co-Authors: A. S. Shashkov, Sofya N Senchenkova, E. M. Tul’skaya, Galina M. Streshinskaya, Yu. I. Kozlova, N. P. Arbatskii, O. V. Bueva, Lyudmila I. Evtushenko
    Abstract:

    The cell wall of Actinoplanes utahensis VKM Ac-674^T contains two anionic polymers: teichoic acid 1,3-poly(glycerol phosphate) that is widespread in cell walls of Gram-positive bacteria; and a unique teichulosonic acid belonging to a new class of bioglycans described only in microorganisms of the Actinomycetales order. The latter polymer contains residues of di-N-acyl derivative of sialic acid-like monosaccharide — 5,7-diamino-3,5,7,9-tetradeoxy-L- glycero -β-L- manno -non-2-ulosonic or pseudaminic acid (Pse) which bears the N-(3,4-dihydroxybutanoyl) group (Dhb) at C7. This polymer has Irregular Structure and consists of fragments of two types, which differ in substitution of the Dhb residues at O4 either with β-D-glucopyranose or with β-Pse residues. Most of the β-Pse residues (∼80%) are glycosylated at position 4 with α-D-galactopyranose residues in both types of fragments. The glucose, galactose, and Dhb residues are partly O-acetylated. The Structures of the polymers were established by chemical and NMR spectroscopy methods.