Morphological investigations in hypersensitivity of delayed type to streptococcal antigens using mesenteric film preparations

1980 ◽  
Vol 90 (2) ◽  
pp. 1100-1103
Author(s):  
M. N. Smirnova ◽  
L. V. Beletskaya
Keyword(s):  
Hypersensitivity Of Delayed Type ◽  
Streptococcal Antigens ◽  
Morphological Investigations

Structure, optical, and morphological investigations of nano copper oxide prepared using RPLD at different laser wavelength effects

2021 ◽  
Author(s):  
Milad Nazar Abul Kareem Alghurabi ◽  
Roaa Shakir Mahmood ◽  
Evan T. Salim ◽  
Sarmad Fawzi Hamza Alhasan ◽  
Farah G. Khalid
Keyword(s):  
Copper Oxide ◽  
Laser Wavelength ◽  
Morphological Investigations

Detection of group B streptococcal antigens in body fluids of neonates

1978 ◽  
Vol 93 (3) ◽  
pp. 491-492 ◽  
Author(s):  
Jane D. Siegel ◽  
George H. McCracken
Keyword(s):  
Body Fluids ◽  
Streptococcal Antigens ◽  
Group B

Morphological Investigations of Organic/Inorganic Nanocomposites Fabricated to Achieve Controlled Dispersion at High Loadings

2011 ◽  
Vol 1312 ◽  
Author(s):  
Andrew J. Duncan ◽  
Andrew B. Schoch ◽  
Christopher S. Gold ◽  
Joseph L. Lenhart ◽  
Frederick L. Beyer
Keyword(s):  
Surface Modification ◽  
Block Copolymer ◽  
Hierarchical Structure ◽  
Sio2 Nanoparticles ◽  
Nanocomposite Materials ◽  
Aggregation State ◽  
Twin Screw ◽  
Inorganic Nanocomposites ◽  
Morphological Investigations

ABSTRACTRealization of property enhancements inherent to the presence of nanoparticles continues to be a challenge for the production of bulk nanocomposite materials with commercially available techniques. This study combines twin-screw compounding with surface modification of SiO2 nanoparticles to enable targeted dispersion in a SEBS block copolymer. Production of these composites with high levels of well-dispersed particulates aims to leverage aggregation for production of hierarchical structure. The aggregation state of the particles as well as the level of order in the block copolymer morphology was determined through USAXS and TEM. Particles coated with ligands miscible with the end-blocks of the BCP (minority component) increased dispersion at all loading levels observed up to 10 vol%. Ligands employed to increase miscibility of the nanoparticle with the mid-block (majority component) resulted in large aggregates for all loadings without disturbance of the BCP morphology.

STUDIES IN THE RELATION OF THE HEMOLYTIC STREPTOCOCCUS TO RHEUMATIC FEVER

PEDIATRICS ◽  
1949 ◽  
Vol 3 (4) ◽  
pp. 482-503
Author(s):  
T. N. HARRIS ◽  
SUSANNA HARRIS ◽  
RUTH L. NAGLE
Keyword(s):  
Rheumatic Fever ◽  
Streptococcal Infection ◽  
Laboratory Diagnosis ◽  
Diagnostic Value ◽  
The Other ◽  
Streptococcal Infections ◽  
Hemolytic Streptococcus ◽  
Streptococcal Antigens ◽  
The Mean

Titrations of antibodies to four streptococcal antigens have been carried out in the sera of patients with rheumatic fever and of convalescents from streptococcal infections. These antigens are the hyaluronidase, the hemolysin, and two somatic fractions, the cytoplasmic particles and supernate proteins. Mean titers to all of these antigens were elevated in both rheumatic and streptococcal infection. The mean titer was somewhat higher in rheumatic than in streptococcal infection in the case of three of these antibodies. In the case of the fourth, antihyaluronidase, this difference was considerably greater. The antihyaluronidase titer showed better correlation with changes in the activity of the rheumatic infection than did the other tests. There was, however, no striking correlation between this titer and the severity of the illness. Application was made of these findings to the problem of laboratory diagnosis of rheumatic fever by streptococcal serology. A method is presented for assessing the relative usefulness of such tests in terms of the, distribution of their titers in this disease and in health. By this method the antihyaluronidase test was found to be most useful of the four. The comparative diagnostic value for rheumatic fever was studied in the case of the antihyaluronidase test, the antistreptolysin test, and of combinations of both tests.

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