Zobrazeno 1 - 10 of 25 pro vyhledávání: '"G H, Richardson"'
1
A Survey of Coliforms and Staphylococcus aureus in Cheese Using Impedimetric and Plate Count Methods
Autor: G. H. Richardson, F. A. Khayat, J. C. Bruhn
Publikováno v: Journal of food protection. 51(1)
A total of 256 cheese samples were analyzed for coliform plate count using violet red bile agar and for an impedance count using BactometerR Coliform Medium with a correlation coefficient between methods of R=-.91. Fifty-four percent of the samples c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff985f0cc935316b38bd840136741b70
https://pubmed.ncbi.nlm.nih.gov/30978865
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2
Detection of Abnormal Milk with Impedance Microbiology Instrumentation
Autor: G. H. Richardson, F. A. Khayat
Publikováno v: Journal of food protection. 49(7)
Mastitic milk was detected by obtaining conductance measurements using an impedance microbiology Bactomatic 120 SC instrument. Conductance readings separated normal and abnormal milks after 30 min at 25°C when readings differed by more than 2 to 3%
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65855a33f834da82c79b8b72907cc062
https://pubmed.ncbi.nlm.nih.gov/30959640
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3
Detection of Penicillin and Streptomycin in Milk by Impedance Microbiology
Autor: G. H. Richardson, O. N. Okigbo
Publikováno v: Journal of food protection. 48(11)
A Bactometer 123 impedance instrument detected .001 IU penicillin or streptomycin/ml of sterile milk inoculated with 5% active lactic culture. Results were available in 5 to 10 h. Inactive lactic culture produced results in less than 24 h. Impedance
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09fe8bf5ba3829c9cb0a334480cc74cd
https://pubmed.ncbi.nlm.nih.gov/30943643
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4
A Rapid Psychrometric Procedure for Water Activity Measurement of Foods in the Intermediate Moisture Range
Autor: C. A. Ernstrom, H. H. Wiebe, R. N. Kidambi, G. H. Richardson
Publikováno v: Journal of food protection. 44(12)
Commercial vapor pressure thermocouple psychrometers (hygrometers) are now generally accepted for measuring water activity, aw (water potential) in plants and soils, and commercial instruments are available. We have adapted them for aw measurements i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78c427b0c2bb8f5c9836e6fe72a0102a
https://pubmed.ncbi.nlm.nih.gov/30856728
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5
A Flooded Plate Loop Count Procedure
Autor: G. H. Richardson, R. L. Olsen
Publikováno v: Journal of food protection. 43(7)
A modification of the plate loop count procedure for milk samples is described which incorporates use of a 0.5-ml diluent loop-rinse onto pre-dried agar medium in a 100-mm petri plate. The sample is distributed using a glass spreader, the plate is dr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbc6b3118ab64f4f97d788944070cb70
https://pubmed.ncbi.nlm.nih.gov/30822951
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6
Group Comparative Study of VRB-2 Agar in the Recovery of Coliforms from Raw Milk, Ice Cream and Cottage Cheese
Autor: C. H. White, D. B. Weddle, R. Y. Cannon, M. Wingfield, K. R. Spurgeon, Robert T. Marshall, P. A. Hartman, L. Lambeth, G. H. Richardson
Publikováno v: Journal of food protection. 41(7)
The method of Hartman et al. for recovering stressed coliform bacteria was evaluated in a group study. The experimental medium, VRB-2, was more productive than VRB medium by 31% for raw milk, 70% for ice cream and 61% for cottage cheese. Differences
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4da8c7b1def1176419b5940764edab86
https://pubmed.ncbi.nlm.nih.gov/30795094
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8
Enumeration of total bacteria in raw and pasteurized milk by reflectance colorimetry: collaborative study
Autor: G H, Richardson, J T, Yuan, D V, Sisson, B O, Stokes
Publikováno v: Journal of AOAC International. 77(3)
Seven out of 9 laboratories completed a collaborative study comparing a reflectance colorimetric (RC) bioactivity monitor (Omnispec 4000) method to the standard plate count (SPC) method for estimation of total bacteria in raw and homogenized pasteuri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::128aa1f73209ce63479cc9b4464f3a59
https://pubmed.ncbi.nlm.nih.gov/8012210
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9
Optical Somatic Cell Counting and Total Protein Analysis in a Dairy Herd Improvement Program
Autor: G. H. Richardson, N. Wang
Publikováno v: Journal of Food Protection. 40:671-675
Milk sample preparation for Optical Somatic Cell Counter II operation was simplified by using a diluter to add fixative, mix, and dilute samples. Potassium dichromate preservative tablets produced a mean increase of 7,000 in somatic cell counts in fr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5390764103f6c74a7ae42b49fbb2d714
https://doi.org/10.4315/0362-028x-40.10.671
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10
Prevention of Churning During Shipment of Dairy Herd Improvement Milk Samples1
Autor: D. V. Moyes, W. J. Barnes, G. H. Richardson, R. D. Elwood
Publikováno v: Journal of Milk and Food Technology. 38:329-332
Polystyrofoam shipping containers used in some DHI central milk testing programs were inadequate to keep fifty 28.3-ml milk samples below 10 C for 1 h when transferred into air at 25 C. Initial milk temperature was 4.4 C. Forty samples in a modified
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7df24a65f31c42d215131cbcbcd29e8d
https://doi.org/10.4315/0022-2747-38.6.329
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