Gelcasting of Yb3Al5O12 using a nontoxic water-soluble copolymer as both dispersant and gelling agent

The 3M Company has developed a sample-ready system (Petrifilm ™ SM) for enumerating bacteria in milk and other food products. The testing unit consists of Standard Methods culture medium coated onto a base film and overlaid with a second film coated with a cold-water-soluble gelling agent and tetrazolium indicator dye. As such, the system is ready to accept samples of product. A pipette or 0.001-ml plate loop continuous pipetting syringe can be used for applying samples. In this study, both methods of sample addition were used and results compared with those of the Standard Plate Count (SPC) and standard Plate Loop (PL) methods for determining bacteria numbers in raw milk. In total, 108 samples were analyzed in duplicate by each of the four methods. The correlation coefficients (r) between the 3M-SPC and SPC, 3M-PL and PL, 3M-PL and SPC and PL and SPC were 0.946, 0.935, 0.941, and 0.974, respectively. Repeatability, as measured by mean log10 variance for duplicate determinations, was essentially the same for the four methods, and in all instances less than 0.005. The mean log10 differences between the SPC and 3M-SPC, and SPC and 3M-PL were, respectively, −0.177 and −0.168. The preceding statistical criteria suggest the Petrifilm™ SM method to be a suitable alternative to the SPC or the PL procedure.

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Water-soluble copolymer compositions of polysaccharides for electrospinning of biomaterials

Materials Today Proceedings ◽

10.1016/j.matpr.2019.12.111 ◽

2020 ◽

Vol 25 ◽

pp. 395-397

Author(s):

Tatiana Akopova ◽

Tatiana Demina ◽

Pavel Ivanov ◽

Tikhon Kurkin ◽

Galina Goncharuk ◽

...

Keyword(s):

Water Soluble ◽

Water Soluble Copolymer

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Evaluation of Dry Sheet Medium Culture Plate (Compactdry TC) Method for Determining Numbers of Bacteria in Food Samples

Journal of Food Protection ◽

10.4315/0362-028x-63.5.665 ◽

2000 ◽

Vol 63 (5) ◽

pp. 665-667 ◽

Cited By ~ 12

Author(s):

SHINGO MIZUOCHI ◽

HIDEMASA KODAKA

Keyword(s):

Cold Water ◽

Correlation Coefficients ◽

Food Samples ◽

Water Soluble ◽

Gelling Agent ◽

Plate Count ◽

Aerobic Bacteria ◽

Suitable Alternative ◽

Standard Plate Count ◽

Standard Plate

The Compactdry, a ready-to-use and self-diffusible dry medium sheet culture system, has been developed by the Nissui Pharmaceutical Co. Ltd. for enumerating bacteria in food. The Compactdry consists of special spread sheet with culture medium that is the same as standard method nutrients, a cold water-soluble gelling agent, and a unique plastic dish. The procedure for bacterial examination in a sample solution (1 ml) is to just inoculate a test solution into the center of the self-diffusible medium and incubate at 35°C for 48 h. The Compactdry TC (CTC) for the enumeration of total aerobic bacteria from 97 food samples was compared with the standard plate count (SPC) method and 3M Petrifilm aerobic count plates (PAC). The correlation coefficients between the CTC and SPC method, the CTC and PAC, and the PAC and SPC method were 0.97, 0.99, and 0.97, respectively. The Compactdry system is useful for the enumeration of total aerobic bacteria in food and may be a possible suitable alternative to the conventional pour-plate or the Petrifilm plate methods.

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Synthesis and conformation of poly(L-lysyl-L-alanyl), a sequence-ordered water-soluble copolymer

Biopolymers ◽

10.1002/bip.1972.360111207 ◽

1972 ◽

Vol 11 (12) ◽

pp. 2461-2481 ◽

Cited By ~ 25

Author(s):

A. Yaron ◽

N. Tal (Turkeltaub) ◽

A. Berger

Keyword(s):

Water Soluble ◽

Water Soluble Copolymer ◽

Ordered Water

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Synthesis of bioactive polyaniline-b-polyacrylic acid copolymer nanofibrils as an effective antibacterial and anticancer agent in cancer therapy, especially for HT29 treatment

RSC Advances ◽

10.1039/d0ra03779f ◽

2020 ◽

Vol 10 (42) ◽

pp. 25290-25304

Author(s):

Nazanin Bagheri ◽

Moslem Mansour Lakouraj ◽

Seyed Reza Nabavi ◽

Hamed Tashakkorian ◽

Mojtaba Mohseni

Keyword(s):

Cancer Therapy ◽

Polyacrylic Acid ◽

Anticancer Agent ◽

Water Soluble ◽

Acid Copolymer ◽

Water Soluble Copolymer

In this work, a new highly water-soluble copolymer of polyacrylic acid with polyaniline is introduced.

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Comparison of the Compact Dry EC with the Most Probable Number Method (AOAC Official Method 966.24) for Enumeration of Escherichia coli and Coliform Bacteria in Raw Meats: Performance-Tested MethodSM 110402

Journal of AOAC International ◽

10.1093/jaoac/89.1.100 ◽

2006 ◽

Vol 89 (1) ◽

pp. 100-114 ◽

Cited By ~ 7

Author(s):

Hidemasa Kodaka ◽

Shingo Mizuochi ◽

Hajime Teramura ◽

Tadanobu Nirazuka ◽

David Goins ◽

...

Keyword(s):

Escherichia Coli ◽

Water Soluble ◽

Test Method ◽

Gelling Agent ◽

Coliform Bacteria ◽

Most Probable Number ◽

Official Method ◽

Probable Number ◽

E Coli ◽

Raw Meats

Abstract Compact Dry E. coli/Coliform Count (EC) is a ready-to-use test method for the enumeration of Escherichia coli and coliform bacteria in food. The plates are presterilized and contain culture medium and a cold water-soluble gelling agent. The medium should be rehydrated with 1 mL diluted sample inoculated onto the center of the self-diffusible medium, allowing the solution to diffuse by capillary action. The plate can be incubated at 35C for 2024 h and the colonies counted without any further working steps. The Compact Dry EC medium plates were validated as an analysis tool for determining colony-forming units (CFU) of E. coli and coliform bacteria from a variety of raw meats using 5 different types of raw meats. The performance tests were conducted at 35C. In all studies performed, no apparent differences were observed between the Compact Dry ECmethod and theAOAC Official Method 966.24 results. For the accuracy claim (n = 75), a correlation factor of r2 = 0.93 (E. coli) and r2 = 0.93 (coliform bacteria) could be assigned, as stated in the application for Performance-Tested MethodSM.

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