Permanent turbidity standards.
Permanent turbidity reference standards suitable for measurement of microbial suspensions were prepared by suspending finely divided titanium dioxide in aryl sulfonamide-formaldehyde or methylstyrene resins. Turbidities of these standards, adjusted to a useful range for microbiological and immunological studies, were compared with other reference standards in use today. Tube holders for a Coleman Photonephelometer and a Nepho-Colorimeter were modified to eliminate the water well and to allow use of optically standardized 10-, 16-, or 18-mm test tubes. The standards and the tube holders have been used satisfactorily for more than 12 years.
18 references, click to expand
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Studies on the nutrition of Brucella melitensis.J Bacteriol. 1953 Sep;66(3):294-9 PMID: 13096477
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The International Reference Preparation for Opacity; notes and description.Bull World Health Organ. 1955;12(5):769-75 PMID: 14379011
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5-FLUOROURACIL AS A SELECTIVE AGENT FOR GROWTH OF LEPTOSPIRAE.J Bacteriol. 1964 Feb;87:422-6 PMID: 14151066
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Microbiological process report: analytical microbiology. III. Turbidimetric methods.Appl Microbiol. 1957 Jul;5(4):235-43 PMID: 13459312
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Pyrex Suspensions in Turbidimetric and Colorimetric Determinations-Standards of Comparison for Bacterial Suspensions and in the Resazurin Test.Am J Public Health Nations Health. 1943 Feb;33(2):137-40 PMID: 18015737
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Turbidimetric measurement of microbial density.Acta Microbiol Acad Sci Hung. 1955;2(3):203-13 PMID: 14387579
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Light scattering studies on insulin; the minimum molecular weight of insulin.J Biol Chem. 1952 Jan;194(1):1-13 PMID: 14927587
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A Permanent Nephelometer from Pyrex Glass.Am J Public Health Nations Health. 1939 Oct;29(10):1147-8 PMID: 18015124
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Nutrition of Leptospira pomona. 1. A chemically defined substitute for rabbit serum ultrafiltrate.J Bacteriol. 1962 Mar;83:668-72 PMID: 14452094
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Studies on the nutrition and physiology of Pasteurella pestis. I. A casein hydrolyzate medium for the growth of Pasteurella pestis.J Bacteriol. 1957 Jan;73(1):122-9 PMID: 13405873
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NUTRITION OF LEPTOSPIRA POMONA AND GROWTH OF 13 OTHER SEROTYPES: A SERUM-FREE MEDIUM EMPLOYING OLEIC ALBUMIN COMPLEX.Am J Vet Res. 1965 Jan;26:39-44 PMID: 14266933
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NUTRITION OF LEPTOSPIRA POMONA. III. CALCIUM, MAGNESIUM, AND POTASSIUM REQUIREMENTS.J Bacteriol. 1963 May;85:983-5 PMID: 14044027
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DIFFERENTIATION OF PATHOGENIC AND SAPROPHYTIC LEPTOSPIRES WITH 8-AZAGUANINE.J Bacteriol. 1964 Dec;88:1618-23 PMID: 14244050
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Studies on the nutrition and physiology of Pasteurella pestis. II. A defined medium for the growth of Pasteurella pestis.J Bacteriol. 1958 Apr;75(4):409-13 PMID: 13525344
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METABOLISM OF LEPTOSPIRAE. I. UTILIZATION OF AMINO ACIDS AND PURINE, AND PYRIMIDINE BASES.Arch Biochem Biophys. 1964 Sep;107:459-70 PMID: 14234495
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NUTRITION OF LEPTOSPIRA POMONA. II. FATTY ACID REQUIREMENTS.J Bacteriol. 1963 May;85:976-82 PMID: 14044026
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The preparation of permanent turbidimetric standards for use in the determination of small amounts of chloride.Biochem J. 1951 Jan;48(1):48-50 PMID: 14820782
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Chemically defined medium for the growth of Pasteurella tularensis.J Bacteriol. 1960 Apr;79:566-71 PMID: 14425793
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