1979 ◽  
Vol 42 (4) ◽  
pp. 310-311
Author(s):  
MARY K. BILMANIS ◽  
CLEVE B. DENNY

Staphylococcus aureus was recovered from post-process inoculated commercially canned green beans after periods of up to 6 weeks of storage and from inoculated commercially canned corn after up to 26 weeks of storage under various conditions. Variance in duration of viability of the culture was apparently due to intrinsic factors of the food and presence of inoculated competing organisms. Drying of the inoculated corn had no effect on viability of the test culture, but drying shortened its length of viability in green beans.


1995 ◽  
Vol 78 (3) ◽  
pp. 705-710 ◽  
Author(s):  
Mary W Trucksess ◽  
Michael E Stack ◽  
Shantae Allen ◽  
Noel Barrion

Abstract A modified liquid chromatographic (LC) method for determining fumonisin B1 (FB1) in corn was applied to canned and frozen sweet corn. The corn is extracted with methanol–water (8 + 2), and the extract is filtered. The filtrate is diluted with water and passed through an immunoaffinity column. After the column is washed with water, FBi is eluted with methanol–water (8 + 2). The eluate is evaporated to dryness by using a vacuum concentrator, and the residue is dissolved in acetonitrile–water (1 +1). FB1 is derivatized with o-phthaldialdehyde. The derivative is separated on a reversed-phase C18 LC column using acetonitrile–water–acetic acid (50 + 50 + 1) and quantitated with a fluorescence detector. Recoveries of FB1 from canned and frozen corn spiked over the range of 50–200 ng/g were 76–88%. The limit of determination was about 25 ng/g, and the limit of detection was about 4 ng/g. The method was applied to 97 commercial canned and frozen sweet corn samples collected from different areas of the United States. Sixty samples contained no FB1. Low levels (trace–82 ng FB1/g corn) were found in 35 samples; 235 ng FB1/g was found in 1 canned corn sample, and 350 ng FB1/g was found in 1 frozen corn sample.


1992 ◽  
Vol 75 (5) ◽  
pp. 887-890 ◽  
Author(s):  
Karen Y Dodson ◽  
Edna R Young ◽  
Abdel-Gawad M Soliman

Abstract A liquid chromatographic method was developed for quantitation of total vitamin C content in various food matrixes. The method includes extraction with 3% mete-phosphoric acid-acetic acid and oxidation of ascorbic acid to dehydroascorbic acid with Norit, followed by reaction with ophenylenediamine to form a fluorescent derivative. The fluorescent derivative is separated on a µBondapak C18 (10 µm) column with methanol-water (55 + 45) and detected fluorometrically. This method is demonstrated to be suitable for several sample matrixes, including complex matrixes of canned corn, potatoes, green beans, potato chips, and cereals. Other products analyzed include infant formula, medical foods, fruit juice, and multivitamin tablets. Recoveries are in the range of 90-108%. Comparison of results with those by the AOAC fluorometric method shows excellent agreement.


1936 ◽  
Vol 1 (1) ◽  
pp. 99-112 ◽  
Author(s):  
VIOLA M. MICHAEL ◽  
FEED W. TANNER
Keyword(s):  

1985 ◽  
Vol 50 (6) ◽  
pp. 1760-1761 ◽  
Author(s):  
ANTHONY LOPEZ ◽  
H. L. WILLIAMS ◽  
F.W. COOLER

2014 ◽  
Vol 21 (3) ◽  
pp. 136-142
Author(s):  
Ieva Laukytė ◽  
Dalia Vaicekauskaitė ◽  
Rūta Dubakienė

The objective of our study was to find out the tendencies of nutrition among pregnant women and to reveal which products, technologically processed or natural foods, were consumed more. 205 women took part in the first Lithuanian newborn cohort, PLANK-K. 62 questionnaires with 198 questions about products consumed during pregnancy were answered. In the main groups of products the majority of women consumed plant origin food. Most of the women ate bread products, grain and its products, cocoa and its products, dairy products, meat and its products. A lot of women consumed nuts and their products, various drinks, some of them ate eggs and their products. The least consumed during pregnancy were various origin fats and honey. In smaller subgroups the majority of women consumed vegetables, the minority of them ate rare meat (venison, lamb) and mixed origin fat. Speaking about technologically processed food, two groups were fit for comparison: processed meat products and canned corn. Processed meat products had big preponderance against consumption of other meat products and more than half of women chose canned corn. It is clear that in this case technologically processed food was chosen more often than non-processed food. The format of this questionnaire allows to accurately evaluate food products that mothers consume during pregnancy, but makes it harder to evaluate technologically processed and non-processed food consumption.


2020 ◽  
Vol 35 ◽  
pp. 100580
Author(s):  
Hwabin Jung ◽  
Ji Hoon Moon ◽  
Jae W. Park ◽  
Won Byong Yoon
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document