Characterization of Fuji Apples from Different Harvest Dates and Storage Conditions from Measurements of Volatiles by Gas Chromatography and Electronic Nose

The stability of human coronavirus 229E infectivity was maximum at pH 6.0 when incubated at either 4 or 33 °C. However, the influence of pH was more pronounced at 33 °C. Viral infectivity was completely lost after a 14-day incubation period at 22, 33, or 37 °C but remained relatively constant at 4 °C for the same length of time. Finally, the infectious titer did not show any significant reduction when subjected to 25 cycles of thawing and freezing. These studies will contribute to optimize virus growth and storage conditions, which will facilitate the molecular characterization of this important pathogen.Key words: coronavirus, pH, temperature, infectivity, human coronavirus.

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Characterization of odor-active compounds in moso bamboo (Phyllostachys pubescens Mazel) leaf via gas chromatography-ion mobility spectrometry, one- and two-dimensional gas chromatography-olfactory-mass spectrometry, and electronic nose

Food Research International ◽

10.1016/j.foodres.2021.110916 ◽

2021 ◽

pp. 110916

Author(s):

Dong-Yu Shen ◽

Huan-Lu Song ◽

Ting-Ting Zou ◽

Su-Yan Wan ◽

Meng-Ke Li

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Electronic Nose ◽

Ion Mobility Spectrometry ◽

Ion Mobility ◽

Moso Bamboo ◽

Phyllostachys Pubescens ◽

Two Dimensional ◽

Active Compounds

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The Effect of Various UHT Processing Parameters and Storage Conditions on the Saturated Aldehydes In Half-and-Half Cream

Journal of Food Protection ◽

10.4315/0362-028x-54.2.109 ◽

1991 ◽

Vol 54 (2) ◽

pp. 109-112 ◽

Cited By ~ 2

Author(s):

R.K. HUTCHENS ◽

A.P. HANSEN

Keyword(s):

Gas Chromatography ◽

High Temperature ◽

Column Chromatography ◽

Steam Injection ◽

Processing Parameters ◽

Storage Conditions ◽

Tetra Pak ◽

And Storage ◽

Ultra High Temperature

Raw cream was standardized to 10% fat and processed by ultra-high-temperature (UHT) steam injection at 149°C for 20 s, 149°C for 3.4 s, 138°C for 20 s, and 143°C for 7 s, then aseptically packaged by a Tetra Pak AB3-250 filler. Packages were stored for 12 months at 24°C and analyzed at 0, 1, 3, 6, and 12 months. Fat-soluble carbonyls were extracted from the UHT cream with carbonyl-free hexanes and converted to their 2,4-dinitrophenyl-hydrazone derivatives. Alkanal hydrazones were separated by column chromatography into pure fractions. Spectrophotometry and gas chromatography were used to identify the alkanals. Butanal, hexanal, heptanal, nonanal, and decanal were identified and found to decrease in concentration during storage.

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Rapid characterization of hypanthium and seed in wild and cultivated rosehip: application of Raman microscopy combined with multivariate analysis

Royal Society Open Science ◽

10.1098/rsos.202064 ◽

2021 ◽

Vol 8 (3) ◽

Author(s):

Ilinka Pećinar ◽

Djurdja Krstić ◽

Gianluca Caruso ◽

Jelena B. Popović-Djordjević

Keyword(s):

Food Industry ◽

Abiotic Factors ◽

Storage Conditions ◽

Chemical Profile ◽

Rosa Canina ◽

Lower Extent ◽

Rapid Characterization ◽

Dog Rose ◽

And Storage

Rosehip (pseudo-fruit) of dog rose ( Rosa canina L.) is highly valued, and owing to nutritional and sensory properties it has a significant place in the food industry. This work represents an innovative report focusing on the evaluation of the phytochemical composition of rosehips (hypanthium and seed) grown in different locations in Serbia, using Raman microspectroscopy combined with multivariate data analysis. Some significant differences arose between the analysed rosehip samples with regard to the chemical profile of both hypanthium parenchyma cells and seed, although no evident discrimination was recorded between the samples of wild and cultivated rosehip. The differences between the hypanthium samples compared were mainly determined by the content of carotenoids, phenolic compounds and polysaccharides, whereas phenolics, polysaccharides (pectin, cellulose and hemicellulose) and lipids (to a lower extent) contributed to the seed sample discrimination. The differences observed between the rosehip samples may be attributed to abiotic factors (growing, ripening and storage conditions), which had a significant impact on the carotenoid and polyphenols biosynthesis.

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Harvest Date Effect on Yield and Controlled-atmosphere Storability of Short-day Onions

HortScience ◽

10.21273/hortsci.39.7.1623 ◽

2004 ◽

Vol 39 (7) ◽

pp. 1623-1629 ◽

Cited By ~ 5

Author(s):

George E. Boyhan ◽

Albert C. Purvis ◽

William C. Hurst ◽

Reid L. Torrance ◽

J. Thad Paulk

Keyword(s):

Storage Conditions ◽

Linear Increase ◽

Harvest Date ◽

Controlled Atmosphere ◽

Degree Days ◽

Short Day ◽

Harvest Dates ◽

Effect On Yield ◽

And Storage ◽

Specific Number

This study was undertaken to evaluate the effect of harvest date on yield and storage of short-day onions in controlled-atmosphere (CA) storage conditions. In general, harvest yields increased with later harvest dates. Yields of jumbo (>7.6 cm) onions primarily showed a quadratic or cubic response to harvest date, first increasing and then showing diminished or reduced marginal yields. Medium (>5.1 to ≤7.6 cm) onions generally showed diminished yield with later harvests as jumbos increased. Neither days from transplanting to harvest nor calculated degree days were reliable at predicting harvest date for a particular cultivar. Cultivars (early, midseason, and late maturing) performed consistently within their harvest class compared to other cultivars for a specific year, but could not be used to accurately predict a specific number of days to harvest over all years. Only three of the eight statistical assessments of percent marketable onions after CA storage were significant with two showing a linear increase with later harvest date and one showing a cubic trend, first increasing, then decreasing, and finally increasing again based on harvest date.

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