Standard Practice for Evaluating Early Hydration of Hydraulic Cementitious Mixtures Using Thermal Measurements

High resolution scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDXA) were performed to investigate microparticles in blended cements and their hydration products containing sodium-rich chemical wastes. The physical appearance of powder particles and the morphological development at different hydration stages were characterized by using high resolution SEM Hitachi S-900 and by SEM S-800 with a EDX spectrometer. Microparticles were dispersed on the sample holder and glued by 1% palomino solution. Hydrated bulk samples were dehydrated by acetone and mounted on the holder by silver paste. Both fracture surfaces and flat cutting sections of hydrating samples were prepared and examined. Some specimens were coated with an 3 nm thick Au-Pd or Cr layer to provide good conducting surfaces. For high resolution SEM S-900 observations the accelerating voltage of electrons was 1-2 KeV to protect the electron charging. Microchemical analyses were carried out by S800/EDS equipped with a LINK detector of take-off angle =40°.

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Standard Practice for the Design, Operation, and Evaluation of Supercooled Fog Dispersal Projects

10.1061/9780784415450 ◽

2020 ◽

Author(s):

Keyword(s):

Standard Practice

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IMMUNOASSAY OF GONADOTROPHINS USING COMPLEMENT FIXATION

Acta Endocrinologica ◽

10.1530/acta.0.062s113 ◽

1969 ◽

Vol 62 (1_Suppl) ◽

pp. S113-S133 ◽

Cited By ~ 2

Author(s):

Sam Brody

Keyword(s):

Complement Fixation Test ◽

Complement Fixation ◽

Research Work ◽

Fixation Test ◽

Years Of Experience ◽

Standard Practice ◽

Clinical Observations ◽

Technical Procedure ◽

Methodological Problems

ABSTRACT This report is a summary of 10 years of experience with the complement fixation test as adopted for the immunoassay of HCG in serum. It is based on published as well as unpublished material. The discussion centers mainly around methodological problems, criteria of reliability, and clinical observations. It is our impression that the complement fixation test is a reasonably rapid and simple technical procedure. It is standard practice in every bacteriological and virological laboratory. The precision of the HCG assay is high. Its accuracy is good. The complement fixation assay, as reported here, fulfils the criteria of specificity. It has been evaluated by means of serological techniques and through comparison between biopotency and immunopotency of HCG in serum with reference to a common standard. Its application for routine as well as research work is illustrated.

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