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15 results on '"G. S. Torrey"'

1. Temperatures in Home Refrigerators and Mold Growth at Refrigeration Temperatures

Author

G. S. Torrey and Elmer H. Marth

Subjects
Chemistry, Food storage, Refrigeration, medicine.disease_cause, Microbiology, Spore, Horticulture, Germination, Mold, Air temperature, Optimum growth, medicine, Incubation, Food Science
Abstract

Air temperature in two home refrigerators ranged from 1.7 to 20.2 C during 4-day periods. Mean air temperatures at thermocouple locations varied from 3.9 to 11.9 C, and temperature changes resulting from opening refrigerators were usually 3 C or less, although increases as great as 18.5 C were recorded. Temperatures in the range at which refrigerators operated were evaluated for their effect on mold growth. Mycelia from a strain of aflatoxin-producing Aspergillus did not grow at 8 C during 504 h of incubation. Isolates of Pencillium obtained from refrigerated food had optimum growth rates of mycelia at 15 C or above but grew at 5 C. However, incubation at 5 C prevented germination of spores of all but one of the isolates that were tested.

Published
2019

2. Carex trisperma

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1390346%5DMICH-V-1390346, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1390346/MICH-V-1390346/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1922

3. Carex stipata

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1387690%5DMICH-V-1387690, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1387690/MICH-V-1387690/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1916

4. Carex retroflexa

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1384888%5DMICH-V-1384888, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1384888/MICH-V-1384888/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1916

5. Carex billingsii

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1363561%5DMICH-V-1363561, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1363561/MICH-V-1363561/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1930

6. Carex appalachica

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1361482%5DMICH-V-1361482, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1361482/MICH-V-1361482/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1930

7. Carex vulpinoidea

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1391880%5DMICH-V-1391880, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1391880/MICH-V-1391880/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1916

8. Carex radiata

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1384397%5DMICH-V-1384397, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1384397/MICH-V-1384397/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

Published
1917

9. Solidago caesia

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1443032%5DMICH-V-1443032, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1443032/MICH-V-1443032/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

10. Solidago caesia

Author

G. S. Torrey, G. S. Torrey, G. S. Torrey, and G. S. Torrey

Abstract

Angiosperms, http://name.umdl.umich.edu/IC-HERB00IC-X-1443032%5DMICH-V-1443032, https://quod.lib.umich.edu/cgi/i/image/api/thumb/herb00ic/1443032/MICH-V-1443032/!250,250, The University of Michigan Library provides access to these materials for educational and research purposes. Some materials may be protected by copyright. If you decide to use any of these materials, you are responsible for making your own legal assessment and securing any necessary permission. If you have questions about the collection, please contact the Herbarium professional staff: herb-dlps-help@umich.edu. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology: libraryit-info@umich.edu., https://www.lib.umich.edu/about-us/policies/copyright-policy

11. Silica gel medium to detect molds that produce aflatoxin

Author

E H Marth and G S Torrey

Subjects
Sucrose, Aflatoxin, Ultraviolet Rays, Silicon dioxide, chemistry.chemical_element, Zinc, Applied Microbiology and Biotechnology, Fluorescence, chemistry.chemical_compound, Aflatoxins, Ultraviolet light, Organic chemistry, Phosphoric Acids, Tartrates, Chromatography, Ecology, Silica gel, Silicon Dioxide, Silicate, Culture Media, Aspergillus, Glucose, chemistry, Food Microbiology, Tartaric acid, Gels, Aspergillus flavus, Research Article, Food Science, Biotechnology
Abstract

A chemically defined nutrient solution containing tartaric acid was made solid by mixing it with an alkaline silicate solution. Production of aflatoxin by asperfilli growing on the silica gel medium coincided with the presence of a blue fluorescent area surrounding colonies, as observed under long-wave ultraviolet light. Presence of aflatoxin in the medium was confirmed by drying the gels, extracting them with chloroform-methanol, and examining extracts for fluorescent materials by viewing them on thin-layer chromatograms under ultraviolet light.

Published
1976
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13. Control of Aflatoxin Production During Fermentation of Wild Rice

Author

D. A. Stuiber, J. F. Frank, Elmer H. Marth, Daryl Lund, G. S. Torrey, and Robert C. Lindsay

Subjects
Aflatoxin, Moisture, Inoculation, technology, industry, and agriculture, food and beverages, Aspergillus flavus, Biology, Contamination, biology.organism_classification, biological factors, Spore, Agronomy, heterocyclic compounds, Fermentation, Food science, Water content
Abstract

The effect of water content of wild rice on aflatoxin production by Aspergillus flavus growing in the rice during fermentation, and influences of processing steps as means to reduce aflatoxin contamination were investigated. Aflatoxin was either not detected or rarely observed during 31 days of storage when rice saturated with water or adjusted to contain 33% water was inoculated with spores of A. flavus and stored at 25 C. Detectable amounts of aflatoxin developed in rice maintained at 20% moisture. Aflatoxin B1 content of contaminated fermented wet wild rice was reduced by parching. Aflatoxin analyses of hulls and kernels from parched rice indicated that most of the aflatoxin B1 remained in the hulls; however, detectable amounts of aflatoxin B1 were present in hulled rice kernels. When wild rice was sterilized with ethylene oxide, saturated with water, stored at 25 C, and inoculated with A. flavus, the mold grew if the rice was mixed daily, but only 10 ppb aflatoxin appeared after 19 days of storage. A. flavus did not grow in similarly treated rice that was not mixed.

Published
1975
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14. Coryneform bacteria in poultry, eggs and meat

Author

A A, Kraft, J C, Ayres, G S, Torrey, R H, Salzer, and G A, da Silva

Subjects
Corynebacteriaceae, Meat, biology, Eggs, Microbacterium, Corynebacterium, Brevibacterium, In Vitro Techniques, biology.organism_classification, Applied Microbiology and Biotechnology, Microbiology, Poultry, chemistry.chemical_compound, chemistry, Arthrobacter, Food Microbiology, Animals, Food science, Lactose, Bacteria
Abstract

Summary. In the course of investigations on the incidence of micro-organisms on turkey giblets, in liquid egg and on meats, determinations were made of coryneform bacteria. Corynebacterium was the most common of 15 genera of micro-organisms isolated from turkey giblets; Brevibacterium and Arthrobacter were also recovered. Species of Corynebacteriaceae were included among the most predominant contaminants in 9 of 17 samples of commercial liquid egg. Of these bacteria, Arthrobacter was most prevalent comprising 18% of the total number of isolates. Gram positive nonmotile rods recovered from fresh beef showed characteristics of Microbacterium and were similar to M. lacticum but failed to ferment lactose or survive temperatures higher than 60° for 30 min.

Published
1966

15. Factors influencing bacterial contamination of commercially produced liquid egg

Author

John C. Ayres, G. S. Torrey, Allen A. Kraft, and R. H. Forsythe

Subjects
Chemistry, Microorganism, Eggs, Food spoilage, Food Contamination, General Medicine, Contamination, Bacterial growth, Pulp and paper industry, Health hazard, Salmonella, embryonic structures, Food Microbiology, Animal Science and Zoology, Food-Processing Industry
Abstract

INTRODUCTION THE egg industry has not yet solved the problems of bacterial growth in shell eggs and contamination of liquid egg products. Processing alone does not insure that organisms will not multiply in the product and cause spoilage or create a health hazard. Egg washing machines are used to remove dirt and to sanitize shell surfaces in an attempt to reduce shell contamination. Machines employed for breaking eggs eliminate much of the chance of contamination associated with breaking by hand. However, liquid egg is still subject to infection by various microorganisms. The bacterial content of the shell eggs used as breaking stock is an important factor in determining numbers and kinds of organisms in the product. Solowey et al. (1946) found more than four times as many samples positive for Salmonellae in liquid egg prepared from dirty shell eggs as in the product from the clean shell eggs. Reports of . . .

Published
1967

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