Heat Treatment Of Eggs Research Articles

Insufficient heat treatment of eggs due to following cooking instructions in the labels

Insufficient heat treatment of eggs due to following cooking instructions in the labels

Development and justification of the parameters of the microwave installation for heat treatment of rejected chicken eggs

Russia ranks sixth in the world in egg production, with only 13% being processed. In addition, egg waste from incubation cabinets is also accumulated, which can be processed into protein feed using vacuum boilers. In this regard, the development of technology and technical means using the energy of the electromagnetic field of ultra-high frequency for heat treatment of rejected eggs in a continuous mode for farms is relevant. The aim of the research is to develop and substantiate the parameters of the microwave installation for heat treatment of rejected chicken eggs as a protein feed additive. Tasks are being solved: to develop a spatial model of a microwave installation of a continuous operation mode; calculate the construction parameters of the installation. The microwave installation developed contains a vertically mounted truncated non-ferromagnetic bicone. Along its inner side surface, a dielectric tube is laid in the form of a biconical spiral. Parallel to the vertical axis of the bicone, a non-ferromagnetic plate is installed, dividing its volume into two chambers: a resonator and a pause chamber. The plate is made in the form of an axial section of a truncated bicone, along the perimeter of which there are openings for transcendental waveguides worn on the dielectric tube from the pause chamber side. On the side surface of the bicone mounted magnetrons. The structural design of the installation ensures the continuity of the heat treatment process without transporting mechanisms. The calculated self-quality of the resonator is 5000. With an installation capacity of 18 kg/h, the specific energy consumption for heat treatment of eggs is 200 W.h/kg.

Genetic sexing strains of mediterranean fruit fly (Diptera: Tephritidae): quality in mass-reared temperature-sensitive lethal strains treated at high temperatures.

The high-temperature treatment of eggs of mass-reared tsl genetic sexing strains in Mediterranean fruit fly, Ceratitis capitata (Wiedemann), during late embryogenesis (the low-high protocol) conserves more male flies than treatment during early embryogenesis. A tsl strain, AUSTRIA 6-97, was constructed to follow the fate of aneuploid individuals during male-only production. Aneuploid individuals are produced following segregation in the translocation heterozygous males, and they can survive to the pupal stage where they compromise quality because they do not eclose as adults. Hatching, emergence, and male fly production were quantified and the heat-treatment protocol was characterized. The low-high egg treatment conserves the number of euploid-balanced males, and there is a very low survival of aneuploid males. After heat treatment of eggs, at least 95% of the male pupae were euploid compared with only 71% from untreated eggs. The quality of euploid male pupae was diminished with successive daily collections, an effect previously attributed to aneuploid survivors. Reduced yield of euploid males from early heat treatments was the result of an emergence effect, in addition to a maternal effect. A third detrimental effect of heat was found, occurring after hatching and before pupation, that reduces the survivorship of euploid males. The low-high treatment protocol yielded more males, with a higher accuracy than other heat treatments. However, although it avoids both the maternal and emergence effects, the production of euploid males was 30% less than the potential production, implying that the low-high heat protocol for killing female embryos in tsl genetic sexing strains can be fine-tuned.

Relative Tolerance to Vapor Heat Treatment of Eggs and Larvae of Bactrocera tryoni (Diptera: Tephritidae) in Mangoes

The tolerances of all fruit-infesting stages of the Queensland fruit fly Bactrocera tryoni (Froggatt) to vapor heat treatment were determined to find the most tolerant stage. A series of doses (fruit core temperatures hom 39 to 46°C) of vapor heat treahnent was applied to ‘Kensington’ mangoes infested with eggs or one of the three larval instal’s of B. tryoni . Probit analysis of the resulting mortality showed that the stages most tolerant to heat were eggs and third instal’s. Quarantine disinfestation protocols should be based on one or both of these stages.

Effects of storage and heat treatment of eggs on stability and congenital transmission of avian lymphoid leukosis viruses

Inactivation of lymphoid leukosis (LL) virus in albumen of eggs laid by infected hens was found to be dependent on storage conditions and titre of virus. Heat treatment (45 degrees C in water bath for 1 hour) of hatching eggs before incubation resulted in the complete inactivation of LL virus in albumen. The group-specific (gs) antigen, however, was not affected by the treatment as indicated by a direct complement-fixation test. Results obtained from heat treatment of naturally infected eggs collected from two breeder flocks were inconsistent. The LL virus infection was reduced, but in only one trial, in chicks hatched from heat-treated eggs of one of the two flocks used. The regimen of heat treatment used in this study had no significant effect on hatchability. The conclusion is that the practical value of this procedure is not clear.