Structural elucidation of the capsular polysaccharide of Streptococcus pneumoniae type 9N

1983 ◽  
Vol 61 (10) ◽  
pp. 1102-1107 ◽  
Author(s):  
Karl-Gunnar Rosell ◽  
Harold J. Jennings
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Streptococcus Pneumoniae ◽  
Magnetic Resonance ◽  
Capsular Polysaccharide ◽  
Glucuronic Acid ◽  
Cross Reactivity ◽  
Structural Elucidation ◽  
Molar Ratio ◽  
The Cross ◽  
Nuclear Magnetic

The specific capsular polysaccharide of Streptococcus pneumoniae type 9N (American type 9) contains D-glucose, D-glucuronic acid, 2-acetamido-2-deoxy-D-glucose, and 2-acetamido-2-deoxy-D-mannose in the molar ratio of 2:1:1:1. Accumulated data from spectroscopic (13C and 1H nuclear magnetic resonance) and methylation analyses of the native and specifically degraded polysaccharide indicated that it was linear and composed of the following pentasaccharide repeating unit; —4)-α-D-GlcpA-(1 → 3)-α-D-Glcp-(1 → 3)-β-D-ManpNAc-(1 → 4)-α-D-Glcp-(1 → 4)-β-D-GlcpNAc(1 →. Structural regions in the type 9N polysaccharide common to those of types 9A, 9L, and 9V have been identified which account for the cross-reactivity of this groups of polysaccharides.

scholarly journals Cross-Axis Coupling Effects in Single-Axis Nuclear Magnetic Resonance Gyroscopes

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 734
Author(s):  
Zhiguo Wang ◽  
Yi Zhang ◽  
Xiang Zhan ◽  
Qiyuan Jiang ◽  
Hui Luo
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Vibration Frequency ◽  
Coupling Effects ◽  
Rotation Rates ◽  
Angular Vibration ◽  
The Cross ◽  
Cross Axis ◽  
Nuclear Magnetic

Nuclear magnetic resonance gyroscopes (NMRGs) may be operated in an environment with violent vibration that usually contains both linear components and angular components. To analyze the influence of angular vibration on an NMRG, cross-axis coupling effects are studied. The cross-axis rotation rates induce an equivalent magnetic field. Its influence can be described by the Bloch equations. The approximate frequency shift and amplitude of the spin oscillator with an equivalent magnetic field in the cross-axis were obtained, which was validated by numerical simulation. The findings show that the angular vibration component leads to a remarkable error for the NMRG. When the angular vibration frequency is near the Larmor frequency, the oscillation frequency of the spins may be locked to the angular vibration frequency, destroying the NMRG’s ability to measure rotation rates. The cross-axis coupling problem should be considered in the design of an NMRG and corresponding inertial navigation systems.

Structural studies of the capsular polysaccharide from Haemophilus pleuropneumoniae serotype 2

1987 ◽  
Vol 65 (5) ◽  
pp. 414-422 ◽  
Author(s):  
Eleonora Altman ◽  
Jean-Robert Brisson ◽  
Malcolm B. Perry
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Molecular Weight ◽  
Capsular Polysaccharide ◽  
Structural Studies ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Structure Formula ◽  
Nuclear Magnetic

The capsular polysaccharide of Haemophilus pleuropneumoniae serotype 2 (ATCC 27089) is composed of D-glucose (two parts), D-galactose (one part), glycerol (one part), and phosphate (one part). Hydrolysis, dephosphorylation, methylation, enzymic studies, and 1H and 13C nuclear magnetic resonance experiments showed that the polysaccharide is a high molecular weight polymer of a tetrasaccharide repeating units, linked by monophosphate diester and having the following structure:[Formula: see text]

Isolation and Structural Elucidation of Some Procyanidins from Apple by Low-Temperature Nuclear Magnetic Resonance

2003 ◽  
Vol 51 (13) ◽  
pp. 3806-3813 ◽  
Author(s):  
Toshihiko Shoji ◽  
Motoh Mutsuga ◽  
Takatoshi Nakamura ◽  
Tomomasa Kanda ◽  
Hiroshi Akiyama ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Low Temperature ◽  
Structural Elucidation ◽  
Nuclear Magnetic

The specific capsular polysaccharide of Streptococcus pneumoniae type 15A (American type 30)

1984 ◽  
Vol 62 (2-3) ◽  
pp. 151-161 ◽  
Author(s):  
Martine Caroff ◽  
Malcolm B. Perry
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Streptococcus Pneumoniae ◽  
Magnetic Resonance ◽  
High Molecular Weight ◽  
Capsular Polysaccharide ◽  
Optical Rotation ◽  
Periodate Oxidation ◽  
Magnetic Resonance Studies ◽  
Structure Formula

The specific capsular polysaccharide of Streptococcus pneumoniae type 15A (American type 30) is composed of D-galactose (three parts), D-glucose (one part), 2-acetamido-2-deoxy-D-glucose (one part), phosphate (one part), and glycerol (one part). Hydrolysis, periodate oxidation, methylation, optical rotation, and nuclear magnetic resonance studies showed that the polysaccharide is a high molecular weight linear polymer of a pentasaccharide repeating unit having the structure:[Formula: see text]

scholarly journals Nuclear Magnetic Resonance Analysis of Solution Conformations in C4-V3 Hybrid Peptides Derived from Human Immunodeficiency Virus (HIV) Type 1 gp120: Relation to Specificity of Peptide-Induced Anti-HIV Neutralizing Antibodies

1999 ◽  
Vol 73 (1) ◽  
pp. 746-750 ◽  
Author(s):  
Hai M. Vu ◽  
David Myers ◽  
Robert de Lorimier ◽  
Thomas J. Matthews ◽  
M. Anthony Moody ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Human Immunodeficiency Virus ◽  
Magnetic Resonance ◽  
Neutralizing Antibodies ◽  
Cross Reactivity ◽  
Nuclear Magnetic Resonance Analysis ◽  
Hybrid Peptides ◽  
Immunogenic Peptides ◽  
Immunodeficiency Virus ◽  
Nuclear Magnetic

ABSTRACT Immunogenic peptides containing epitopes of the gp120 C4 and V3 regions from human immunodeficiency virus strains MN and EV91 have been studied by nuclear magnetic resonance and molecular modeling and used as immunogens in rhesus monkeys. The results, combined with those for other peptides, suggest a correlation between solution conformation and immunologic cross-reactivity.

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