Respiration of Tribolium castaneum (Herbst) at reduced oxygen concentrations

Emekçi, Mevlüt; Navarro, S.; Donahaye, E.; Rindner, Miriam; Azrieli, A.

doi:10.1016/s0022-474x(01)00045-5

Cited by 65 publications

(43 citation statements)

References 30 publications

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“…Detection of pest infestation in food commodities and in their storage premises is essential to ensure wholesome and acceptable produce for human consumption, for regulatory compliance, for diagnosis of incipient infestation and to ascertain the success of the control measures such as fumigants (Rajendran 1999). Application of thermal imaging for the detection of all insect post-embryonic stages is based on the temperature difference due to heat production by respiration compared to grain temperature (Emekci et al 2002(Emekci et al , 2004. This temperature difference due to infestation inside a kernel can be detected by thermal imaging.…”

Section: Grain Qualitymentioning

confidence: 99%

Measurement techniques and application of electrical properties for nondestructive quality evaluation of foods—a review

et al. 2011

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Non-destructive systems are recent trends for quality evaluation of fruits and vegetables. Information on post-harvest variations in electrical properties is needed to develop new instruments for this purpose. Electrical properties are finding increasing application in agriculture and food processing industries. Knowledge of dielectric properties of foods as a function of moisture content and temperature is essential in the design and control of drying systems. As simple, rapid and non-destructive measuring techniques, dielectric spectroscopy provides information about the dielectric response of materials to electromagnetic field. Electrical properties of agricultural materials have been of interest for many years. The interest in dielectric properties of materials has historically been associated with the design of electrical equipment. This review paper covers theoretical aspects of different electrical properties, their measurement techniques, applications of dielectric properties in agriculture/food processing sector and potential applications of thermal imaging (TI) for quality and safety assessment in food processing. The values of dielectric properties of a number of products including food grains, fruits and vegetables, and meat and meat products are presented in table form. This comprehensive coverage will be useful for academic, scientific and industrial community in treating and applying the facts in developing/testing new processes and products based on electromagnetic energy application.Keywords Electrical properties . Non-destructive . Measuring techniques . Dielectric constant . Loss factor . Thermal imaging technique . Food quality evaluationThe material investigation and moisture measurement using electromagnetic waves in wide spectrum serve for quality control and improvement in many branches like industry, forest and wood-working industry, civil engineering, agriculture, commerce and also foods e.g. for quality evaluation of meat, fruits, coffee etc (Hlavacova 2003; Venkatesh and Raghavan 2004). Non-destructive evaluation of quality based on constituents of fruits and vegetables has been successfully used (Chen et al. 1999;Jha et al. 2001;Kawano 1998). Electrical characteristics of agricultural materials have been of interest for many years (Nelson 2006) and are utilized in many areas of human activities. Techniques for non-destructive determination of quality and related characteristics of agricultural products are helpful to producers, handlers and processors . Permittivity and moisture can be closely correlated when water content is high. Knowledge of dielectric properties in partially frozen material is critical in determining the rates and uniformity of heating in microwave thawing. Electrical properties are important in processing foods with pulsed electric fields, ohmic heating, induction heating, radio frequency, and microwave heating. These properties are also useful in the detection of processing conditions or the quality of foods (Barbosa-Canovas et al. 2006). Considering ...

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Section: Grain Qualitymentioning

confidence: 99%

Measurement techniques and application of electrical properties for nondestructive quality evaluation of foods—a review

et al. 2011

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“…Controlled atmospheres increase the action of low humidity, by prolonging opening of the spiracles, thereby permitting rapid loss of water. In the same way, high humidity suppresses the desiccation mechanism (Gullan & Cranston, 1994;Emekci et al, 2002;Mitcham et al, 2006). DISCUSSION …”

Section: Introductionmentioning

confidence: 97%

“…The increase in respiratory rate results in dehydration due to prolonged opening of the stigma, especially at high temperatures and low humidity (Emekci et al, 2002;Mitcham et al, 2006). Jay et al (1971) studied the relationship between mortality and R.H., by examining the death rate of red flour beetles Tribolium castaneum (Herbst) and confused flour beetles Tribolium confusum Jacquelin du Val in a nitrogen atmosphere, containing between 0.8% and 1% oxygen, after 24 hours at R.H. of 9%, 33%, 54%, and 68%.…”

Section: Introductionmentioning

confidence: 99%

Controlled atmospheres against insect pests in museums: a review and some considerations

Berzolla

Reguzzi

Chiappini

2011

J Entomol Acarol Res

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-Controlled atmospheres using nitrogen represent a safe and effective method for both objects and human health. The use of this technique against pests in museums has received an increasing amount of interest during the last twenty years. This paper looks at the researches into anoxic treatments that use nitrogen from the late '80s until now. At the moment, the recommended protocol suggests an oxygen percentage below 1% for at least three weeks. Considering that the major practical problems of controlled atmospheres are connected to treatment time and low oxygen percentage, it is very important to develop more flexible protocols that consider higher oxygen percentages or shorter treatment times, exploiting temperature and/or relative humidity. At oxygen percentage higher than those commonly used, temperature and relative humidity are very critical to insects' development and success. Preliminary data (unpublished) show that it is possible to adapt the application of the controlled atmospheres to different situations, taking advantage of favorable conditions already present in the considered situation and at the same time to use the other parameters at more favorable levels.

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“…Esta técnica resulta na redução da concentração de oxigênio (O 2 ) e acréscimo da concentração de dióxido de carbono (CO 2 ) devido ao processo respiratório dos componentes bióticos do ecossistema (grãos, fungos, insetos, etc.) (EMEKCI et al, 2002;EMEKCI et al, 2004, NAVARRO;DONAHAYE, 2005). A atmosfera rica em CO 2 e pobre em O 2 pode reduzir a capacidade de reprodução e/ou desenvolvimento de insetos, de fungos, como também a própria atividade metabólica dos grãos, favorecendo a sua conservação (AGUIAR et al, 2004;QUEZADA et al, 2006).…”

Section: Introductionunclassified

Perda de matéria seca em grãos de milho armazenados em bolsas herméticas

Santos¹,

Martins²,

Faroni³

et al. 2012

Rev. Ciênc. Agron.

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RESUMO -O objetivo deste estudo foi avaliar a qualidade e a perda de matéria seca em grãos de milho armazenados em bolsas herméticas sob diferentes temperaturas. Para isso, grãos de milho com teor de água inicial de 14,8 e 17,9% foram acondicionados em bolsas de polietileno lacradas e armazenados em temperaturas de 15; 25 e 35 °C. Ao longo de 150 dias, em intervalos de 30 dias, as concentrações de oxigênio (O 2 ) e dióxido de carbono (CO 2 ) nas bolsas foram medidas e amostras dos grãos foram retiradas para a determinação do teor de água, massa específica aparente da matéria seca, percentual de germinação e classificação comercial. A perda de matéria seca foi estimada por meio de um modelo obtido como função da taxa respiratória dos grãos. Em 150 dias, a perda de matéria seca dos grãos de milho armazenados com teor de água de 14,8% foi aproximadamente 3,5 vezes inferior à verificada para o produto armazenado com teor de água de 17,9%. Com base nos resultados de percentual de germinação e massa específica aparente da matéria seca, o limite de 0,015% de perda de matéria seca pode ser considerado como máximo admissível para a manutenção da integridade dos grãos no armazenamento em bolsas herméticas. Aos 150 dias, apenas, os grãos de milho armazenados com teor de água de 17,9% em temperatura de 35 °C apresentam classificação inferior (Tipo 2) à do início do experimento e esta condição coincidiu com a perda de matéria seca de 0,037%. Palavras-chave:Milho. Grãos-armazenamento. Taxa respiratória.ABSTRACT -The aim of this study was to evaluate the quality and loss of dry matter of corn grain stored in airtight bags at different temperatures. To do this, corn grain with an initial moisture content of 14.8 and 17.9% was placed into polyethylene bags which were sealed and stored at temperatures of 15, 25 and 35 °C. For 150 days, at 30-day intervals, the concentrations of oxygen (O 2 ) and carbon dioxide (CO 2 ) in the bags were measured, and grain samples were taken to determine the moisture content, apparent specific dry matter weight, percentage of germination and commercial classification. Dry matter loss was estimated by means of a model obtained as a function of the respiratory rate of the grains. At 150 days, the loss of dry matter of the corn grains with a moisture content of 14.8% when stored, was approximately 3.5 times lower than that of the product with a moisture content of 17.9% when stored. Based on the results of the percentage of germination and apparent specific dry matter weight, the limit of a 0.015% loss in dry matter can be considered as the maximum permissible to maintain the integrity of corn grain in storage in sealed bags. At 150 days, only the corn grain, stored with moisture content of 17.9% and at a temperature of 35 °C, showed a lower classification (Type 2) than at the beginning of the experiment, and this condition coincided with a dry matter loss of 0.037 %.

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Respiration of Tribolium castaneum (Herbst) at reduced oxygen concentrations

Cited by 65 publications

References 30 publications

Measurement techniques and application of electrical properties for nondestructive quality evaluation of foods—a review

Measurement techniques and application of electrical properties for nondestructive quality evaluation of foods—a review

Controlled atmospheres against insect pests in museums: a review and some considerations

Perda de matéria seca em grãos de milho armazenados em bolsas herméticas

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