Rolling Ball Viscometer for Use at Temperatures to 400°C under Pressures to 5 Kilobar

1965 ◽  
Vol 36 (12) ◽  
pp. 1840-1843 ◽  
Author(s):  
D. E. Harrison ◽  
R. B. Gosser
Keyword(s):  
Rolling Ball ◽  
Rolling Ball Viscometer

Rolling Ball Viscometer

1943 ◽  
Vol 15 (3) ◽  
pp. 212-218 ◽  
Author(s):  
Robert Hubbard ◽  
George Brown
Keyword(s):  
Rolling Ball ◽  
Rolling Ball Viscometer

A VISCOMETRIC METHOD FOR THE ESTIMATION OF MILK CELL COUNT

1970 ◽  
Vol 33 (8) ◽  
pp. 351-354
Author(s):  
W. G. Whittlestone ◽  
L. R. Fell ◽  
H. De Langen
Keyword(s):  
Cell Count ◽  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Rolling Ball ◽  
Simple Apparatus ◽  
Microscopic Count ◽  
Rolling Ball Viscometer

The use of a rolling ball viscometer to estimate the cell count of milk treated with California Mastitis Reagent is described. The method compares favorably with the direct microscopic count and requires relatively simple apparatus and unskilled operators. A correlation coefficient for mean count and log viscometer time of 0.93 with a coefficient of variation of 8.1% were obtained. The repeatability of viscometer readings was 0.97.

A High Pressure Rolling-Ball Viscometer up to 1 GPa

1986 ◽  
Vol 25 (Part 1, No. 7) ◽  
pp. 1091-1096 ◽  
Author(s):  
Masaya Izuchi ◽  
Ken Nishibata
Keyword(s):  
High Pressure ◽  
Rolling Ball ◽  
Rolling Ball Viscometer

Methods to Detect Abnormal Milk – A Review

1980 ◽  
Vol 43 (1) ◽  
pp. 58-64 ◽  
Author(s):  
W. A. GORDON ◽  
H. A. MORRIS ◽  
V. PACKARD
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Detection Methods ◽  
Rolling Ball ◽  
California Mastitis Test ◽  
Mastitic Milk ◽  
Rolling Ball Viscometer

Screening and confirmatory methods for detecting abnormal milk, mastitic milk, or milk of high somatic cell count are reviewed. Those procedures reviewed in some detail include the Catalase Test. Brabant Mastitis Reaction, pH and chlorine analysis, Ruakura Rolling Ball Viscometer method. California Mastitis Test (CMT), Wisconsin Mastitis Test (WMT), Optical Somatic Cell Count (OSCC). Direct Microscopic Somatic Cell Count (DMSCC), and Electronic Somatic Cell count (ESCC). Other detection methods are tabulated.

scholarly journals HUMORAL RHEOLOGY

1942 ◽  
Vol 26 (1) ◽  
pp. 49-64 ◽  
Author(s):  
Alfred L. Copley ◽  
Ludwig C. Krchma ◽  
Mary E. Whitney
Keyword(s):  
Apparent Viscosity ◽  
Specific Property ◽  
Age Hardening ◽  
Flow Properties ◽  
Specific Viscosity ◽  
Rolling Ball ◽  
Yield Value ◽  
The Relationship ◽  
Rolling Ball Viscometer ◽  
High Shearing

1. A modified falling ball viscometer (rolling ball viscometer) for blood and other humors is presented. It is capable of easily measuring flow properties at several stresses, as is required to define satisfactorily the properties of anomalous flow systems. At high shearing stresses, apparent specific viscosity values of 2.5 + are observed, corresponding to 2.2 ±0.2 reported as possible with the biological viscometer of Whittaker and Winton. 2. Previous references to the anomalous flow properties of blood were verified. It was demonstrated that these systems conform to the Bingham concept of anomalous flow. To define completely the flow properties of such systems it is necessary to make determinations at at least two shearing stresses, preferably more. Data are reported for the pseudoviscosity and yield value, the latter being possibly the most specific property of the three bloods studied. 3. Heparin in increasing amounts tended to decrease the apparent viscosity, pseudoviscosity, and yield value of blood. Similar increases of heparin also reduced the viscosites of the serum and plasma. 4. The ratio of the apparent viscosity of blood and its plasma was found to be reasonably constant as reported by Trevan. However, as the apparent viscosity is a function of the shearing stress, it is believed that the relationship for the calculations of corpuscular concentrations, such as the Whittaker and Winton modification of the Hatschek formula, is specific for the instrument and conditions of tests by which it was determined. 5. Heparinized blood was found to exhibit thixotropy, dilatancy, and age-hardening phenomena.

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