scholarly journals Ozone inactivation of fungi associated with barley grain

2021 ◽  
Author(s):  
Brent Allen
Keyword(s):  
Moisture Content ◽  
Aspergillus Flavus ◽  
Contact Time ◽  
Vegetative State ◽  
Barley Grain ◽  
High Moisture Content ◽  
Penicillium Verrucosum ◽  
High Moisture ◽  
Ozone Dose

The use of ozone as a fungicide for barley storage was studied. The effects of ozone on the inactivation of natural and inoculated fungi on barley were evaluated at different water activities and temperatures. Results indicated that higher ozone doses were better at inactivating the natural fungi on barley than lower ozone doses. An ozone dose of 0.98mg/g • min was able to reduce the natural fungi counts on the barley at 0.98aw by over 97% after 45 minutes of ozone contact time. The inactivation of the natural fungi and Aspergillus flavus on the barley was favoured by higher temperatures. Ozone consumption of the barley was higher at higher temperatures. Tests on A. flavus spores inoculated on barley indicated that they were resistant to ozone doses up to 4.90mg/g while Penicillium, verrucosum spores showed no resistance to any ozone doses that were tested. Inactivation of A. flavus (vegetative state) and P. verrucosum spores were favoured by higher water activities. The effect of ozone on barley germination was also examined. By 15 minutes of treatment at an ozone dose of 0.98mg/g • min, all the fungi tested were inactivated by over 90%, while germination was only reduced by 6%. Different water activities had no effect on the germination of barley. The findings show that ozone may be applied as a fumigant against fungi attacking high moisture content barley and provide the possibility of using it as an alternative to current chemicals for preserving stored barley.

scholarly journals Ozone inactivation of fungi associated with barley grain

2021 ◽  
Author(s):  
Brent Allen
Keyword(s):  
Moisture Content ◽  
Aspergillus Flavus ◽  
Contact Time ◽  
Vegetative State ◽  
Barley Grain ◽  
High Moisture Content ◽  
Penicillium Verrucosum ◽  
High Moisture ◽  
Ozone Dose

The use of ozone as a fungicide for barley storage was studied. The effects of ozone on the inactivation of natural and inoculated fungi on barley were evaluated at different water activities and temperatures. Results indicated that higher ozone doses were better at inactivating the natural fungi on barley than lower ozone doses. An ozone dose of 0.98mg/g • min was able to reduce the natural fungi counts on the barley at 0.98aw by over 97% after 45 minutes of ozone contact time. The inactivation of the natural fungi and Aspergillus flavus on the barley was favoured by higher temperatures. Ozone consumption of the barley was higher at higher temperatures. Tests on A. flavus spores inoculated on barley indicated that they were resistant to ozone doses up to 4.90mg/g while Penicillium, verrucosum spores showed no resistance to any ozone doses that were tested. Inactivation of A. flavus (vegetative state) and P. verrucosum spores were favoured by higher water activities. The effect of ozone on barley germination was also examined. By 15 minutes of treatment at an ozone dose of 0.98mg/g • min, all the fungi tested were inactivated by over 90%, while germination was only reduced by 6%. Different water activities had no effect on the germination of barley. The findings show that ozone may be applied as a fumigant against fungi attacking high moisture content barley and provide the possibility of using it as an alternative to current chemicals for preserving stored barley.

Fumigation of high moisture seed with acetic acid to control storage mold

1996 ◽  
Vol 76 (3) ◽  
pp. 551-555 ◽  
Author(s):  
P. L. Sholberg ◽  
A. P. Gaunce
Keyword(s):  
Acetic Acid ◽  
Moisture Content ◽  
Organic Acid ◽  
Aspergillus Flavus ◽  
Untreated Control ◽  
High Moisture Content ◽  
High Moisture ◽  
Storage Fungi

Acetic acid (AA) vapour applied to high moisture content canola, corn, rice and wheat inoculated with conidia of Aspergillus flavus effectively prevented A. flavus from growing. Wheat (500 g) initially fumigated with AA at 0.78 mL kg−1 of seed had complete germination and zero mold infection after storage for 102 d at 20 °C. The untreated control had 37% germination and all seeds were infected. Canola fumigated with AA at 0.58 mL kg−1 of seed and evaluated for mold colonies/gram of seed had zero compared to 2400 colonies in the untreated control after storage at 20 °C for 38 d. Absorption of AA vapour occurred rapidly during the first few minutes of fumigation, reaching equilibrium within approximately 20 min. The amount of AA vapour absorbed by seed increased as moisture content increased. Key words:Aspergillus flavus, storage fungi, organic acid, vapour

Drying kinetics of processed natural coffee with high moisture content

2017 ◽  
Vol 12 (3) ◽  
pp. 400 ◽  
Author(s):  
Valdiney Cambuy Siqueira ◽  
Flávio Meira Borém ◽  
Guilherme Euripedes Alves ◽  
Eder Pedroza Isquierdo ◽  
Afonso Celso Ferreira Pinto ◽  
...  
Keyword(s):  
Moisture Content ◽  
Drying Kinetics ◽  
High Moisture Content ◽  
High Moisture ◽  
Kinetics Of

Objetivou-se, com o presente trabalho, propor um novo método de processamento e secagem, assim como avaliar o comportamento dos grãos submetidos a este processo, por meio da taxa de redução de água e do ajuste de diferentes modelos matemáticos aos dados experimentais da secagem. Os frutos colhidos no estágio maduro foram divididos em três lotes. O primeiro foi seco continuamente à temperatura de 40±1 °C. O segundo consiste na secagem do café natural até os teores de água de 0,56±0,02, 0,41±0,02, 0,28±0,02 e 0,20±0,02 decimal (base seca, b.s.), seguido de beneficiamento e secagem contínua nas temperaturas de 35±1 ºC e 40±1 ºC. O terceiro lote correspondeu à secagem contínua do café descascado e desmucilado na temperatura de 40±1 °C. Em todos os lotes, a secagem foi encerrada quando os grãos atingiram o teor de água de 0,12±0,05 (b.s.). Aos dados experimentais da secagem foram ajustados dez modelos matemáticos utilizados para representação da secagem dos produtos agrícolas. Além da representação da cinética de secagem foi avaliada a taxa de redução de água dos grãos. Conclui-se que a taxa de redução de água é maior para a temperatura de secagem de 40±1 °C, especialmente para maiores teores de água. O tempo total de secagem do café beneficiado com alto teor de água é expressivamente reduzido, quando comparado ao tempo de secagem completa do café natural. O modelo de Midilli descreve satisfatoriamente a cinética de secagem do café beneficiado.

Optimization of drying of low-grade coal with high moisture content using a disc dryer

2014 ◽  
Vol 124 ◽  
pp. 267-274 ◽  
Author(s):  
Seung-Hyun Moon ◽  
In-Soo Ryu ◽  
Seung-Jae Lee ◽  
Tae-In Ohm
Keyword(s):  
Moisture Content ◽  
Low Grade ◽  
High Moisture Content ◽  
High Moisture

scholarly journals Key Metallurgical Parameters of Fe-Ni Production During 1984–1997 and 2007–2017 at the Ferronickel Smelter in Drenas

2020 ◽  
Vol 67 (2) ◽  
pp. 73-77
Author(s):  
Zarife Bajraktari-Gashi ◽  
Muharrem Zabeli ◽  
Behram Halilaj
Keyword(s):  
Moisture Content ◽  
Casting Process ◽  
The Philippines ◽  
High Moisture Content ◽  
High Moisture ◽  
Nickel Ores ◽  
Iron Nickel ◽  
Rotary Kilns ◽  
The Republic ◽  
Laterite Ore

AbstractDuring 1984–1997, the ferronickel plant in Drenas used iron-nickel ore from the mines of the Republic of Kosovo: Glavica and Çikatove (Dushkaje and Suke) mines. However, during the years 2007–2017, when the plant started operating from the cessation of production, which was from 1998 to 2007, some types of iron-nickel ores from different countries began to be used, starting from iron-nickel ores from Kosovo, iron-nickel ores from Albania, ores from Indonesia, ores from the Philippines, ores from Guatemala, ores from Turkey and ores from Macedonia. The ore composition, however, is mainly oxide-laterite ore. Iron-nickel ores in the plant are characterised by high moisture content, a very important factor influencing the process of scraping the charge in rotary kilns and presenting in general. Among the iron-nickel ore used in the ferronickel plant, the ores from Albania are characterised due to their low moisture content when compared with the other ores as well as the high content of iron oxides, which affect the temperature rise inside the furnaces, as the iron ores play an important role in the pre-casting process in rotary kilns.

scholarly journals Mycoflora of sawn timbers in Benin City

2014 ◽  
Vol 23 (2) ◽  
pp. 89-95
Author(s):  
J. A. Okhuoya ◽  
S. O. Itaman
Keyword(s):  
Moisture Content ◽  
Pleurotus Ostreatus ◽  
Fungal Species ◽  
High Moisture Content ◽  
High Moisture ◽  
Benin City ◽  
The Poor ◽  
High Incidence

In a fungal suryey of sawn timbers in scattared localities in Benin City, fungal species isolated were mainly members of <i>Hyphomycetes</i>, with few <i>Ascomycetes</i> and<i> Basidiomycetes</i>. Cellulolytic abilities of isolates were determined and found to be highest in a basidiomycete, <i>Pleurotus ostreatus</i>. The high incidence of these isolates was traced to the poor ventillation in the shades where the timbers arę sold and the high moisture content of timber before display for sale.

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