Controlling Ethylene Levels in the Atmosphere of Small Containers of Apples

Forsyth, F. R.; Eaves, C. A.; Lockhart, C. L.

doi:10.4141/cjps67-126

Cited by 22 publications

(10 citation statements)

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“…Subsequent samples contained an appreciable amount of ethylene. The incomplete removal of ethylene by brominated activated charcoal (7,20) and permanganates (7) reported in previous studies, as compared to our results (methods 12, 14, and 15), could be a consequence of different surface to volume ratios and different initial amounts of ethylene. Iodine pentoxide (method 16) oxidized ethylene as well as most of ethane.…”

Section: --12contrasting

confidence: 36%

Comparison and Evaluation Methods for the Removal of Ethylene and Other Hydrocarbons from Air for Biological Studies

Eastwell

Bassi²,

Spencer³

1978

Plant Physiol.

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A random sampling analysis of laboratory air and of air from commercially available cylinders indicated that they contain appreciable amounts of low molecular weight hydrocarbons, viz. methane, ethane, and ethylene, as contaminants. These impurities could lead to erroneous conclusions in studies of plant growth and metabolism. Different methods for removal of these contaminants were compared and evaluated in the present investigation for their suitability in plant studies. Most of the methods currently being used were found inadequate. The use of metal catalysts at high temperature, adapted from gas analysis techniques, provides an inexpensive and efficient method for removing hydrocarbons from air in both closed and continuous flow systems.

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Section: --12contrasting

confidence: 36%

Comparison and Evaluation Methods for the Removal of Ethylene and Other Hydrocarbons from Air for Biological Studies

Eastwell

Bassi²,

Spencer³

1978

Plant Physiol.

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“…Potassium permanganate is a stable purple solid that is a strong oxidizing agent and readily oxidizes ethylene. The ability of potassium permanganate to reduce ethylene concentration in the atmosphere around horticultural produce was fi rst demonstrated by Forsyth et al (1967) on apples. The reduction in ethylene affected by addition of potassium permanganate was subsequently found to delay the ripening of many climacteric fruits such as banana (Scott et al, 1970), kiwifruit (Scott et al, 1984), mango (Esguerra et al, 1978) and avocado (Hatton and Reeder, 1972).…”

mentioning

confidence: 99%

“…Accepted for publication 12 Dec. 2003. as celite (Forsyth et al, 1967), vermiculite (Scott et al, 1970), alumina (Jayamaran and Raju, 1992), zeolite (Oh et al, 1996) and clay (Picon et al, 1993). A range of commercial potassium permanganate products is now available with a common carrier being alumina beads (e.g., Purafi l (Purafi l, Doraville Ga.), Circul-Aire (Circul-Aire, Montreal), Ethysorb (Molecular Products, Thaxted, Essex) and Bloomfresh (Ausdel, Cheltenham, Victoria)).…”

mentioning

confidence: 99%

Efficacy of Potassium Permanganate Impregnated into Alumina Beads to Reduce Atmospheric Ethylene

Wills¹,

Warton²

2004

jashs

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A systematic study was conducted on the ability of potassium permanganate absorbent to remove low levels of ethylene from the atmosphere. Absorption of potassium permanganate onto alumina beads by dipping in a saturated solution was maximal at 2 g/100 g after 2 hours at 20 °C and 4 g/100 g after 1 hour at 65 °C. Commercial alumina-based absorbents were found to contain potassium permanganate at 2.7 to 6.0 g/100 g suggesting many are prepared at elevated temperature. Trials in a closed system at 20 °C and 60% to 70% RH with alumina beads containing potassium permanganate at 4 g/100 g showed a logarithmic decrease in ethylene concentration with 90% of the ethylene removed after 2.5 to 3.0 hours. Relative humidity (RH) had a marked inverse effect on ethylene absorption with reactivity at 100% RH calculated to be 15% of that at 0% RH. Performance of potassium permanganate where ethylene was continually generated by a continuous flow of ethylene at 14 μL·h-1 through the container showed a steady state was attained within 1 hour and maintained for 24 hours. Ethylene removal increased linearly with bead weight and ranged from 30% with 1 g to 90% with 50 g. Examination over 20 days showed a continuing decrease in rate of ethylene removal which after 14 days had declined to 10% of incoming ethylene although 44% of the original level of potassium permanganate still remained in the beads. Calculations based on known endogenous ethylene production rates suggest that at 20 °C and 90% RH, use of a potassium permanganate-alumina absorbent would be beneficial with produce having a low level of ethylene generation. Suitability for larger packages of produce generating higher ethylene levels is questionable as >1 kg of absorbent may be required.

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“…One of the simplest ways to remove ethylene from the atmosphere is to absorb and oxidize it with potassium permanganate to produce CO 2 and H 2 O. The ability of potassium permanganate in reducing the ethylene concentration in the atmosphere around horticultural produce was first demonstrated by Forsyth et al (1967) in apples. It was demonstrated that KMnO 4 retarded the ripening of many fruits (Scott et al 1970;Wills et al 1989).…”

Section: Introductionmentioning

confidence: 99%

Response of different maturity stages of sapota (Manilkara achras Mill.) cv. Kallipatti to in-package ethylene absorbent

et al. 2011

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Sapota fruits are highly perishable due to their climacteric nature. The rapid softening of fruits is primarily due to high activity of many oxidative enzymes and liberation of ethylene. Harvest maturity plays a crucial role in deciding the marketability of climacteric fruits in general. Attempt has been made to evaluate the response of ethylene absorbent on variable maturity groups of harvested Sapota cv. Kallipatti with the objective to delay the ripening during transit and extend its marketability during storage at ambient condition (27-32°C & 65-75% R.H.). Harvested fruits having three different degree of ripeness (as maturity indices viz. mature, half-ripe and ripe) were packed with or without ethylene absorbent sachets (Bioconservación, France) in 10 kg CFB boxes and transported from Dahnu to Delhi covering a distant of approximately 2500 KM by truck on road along with conventional packaging as control. The fruits were evaluated immediately on arrival at Delhi and subsequently during storage for various physical, physiological, biochemical and decay parameters. Mature fruits with ethylene absorbent exhibited maximum delay in ripening, low ethylene liberation, weight loss and high fruit firmness. The response of ethylene absorbent to extend the marketability of ripe fruit was not significant.

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Controlling Ethylene Levels in the Atmosphere of Small Containers of Apples

Abstract: not available

Cited by 22 publications

References 0 publications

Comparison and Evaluation Methods for the Removal of Ethylene and Other Hydrocarbons from Air for Biological Studies

Comparison and Evaluation Methods for the Removal of Ethylene and Other Hydrocarbons from Air for Biological Studies

Efficacy of Potassium Permanganate Impregnated into Alumina Beads to Reduce Atmospheric Ethylene

Response of different maturity stages of sapota (Manilkara achras Mill.) cv. Kallipatti to in-package ethylene absorbent

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