کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2842902 1571101 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling and quantification of the thermoregulatory responses of the developing avian embryo: Electrical analogies of a physiological system
ترجمه فارسی عنوان
مدل سازی و اندازه گیری واکنش های حرارتی جنین پرنده ای که در حال توسعه است: الگویی های الکتریکی یک سیستم فیزیولوژیکی
کلمات کلیدی
سیستم ترموکوپل تقارن الکتریکی الکتریکی، ناهنجاری حرارتی، مدل سازی، انکوباسیون
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی


• The incubated fertile egg considered is considered as a heat manipulating system.
• Incubated fertile egg under time-varying ambient temperature is acting as a reactive circuit.
• The thermal response of the fertile egg to changes in ambient temperature is modelled.
• The model quantifies the thermal impedance and thermoregulatory actions of the incubated embryo.

Homeothermic animals, including birds, try to keep their body temperature at a constant level within certain boundaries by using thermoregulatory mechanisms. However, during incubation, the thermoregulatory system of the chicken embryo evolves through different stages from a poikilothermic to a homeothermic system. Hence, the thermal response of the fertile egg to changes in ambient temperature is different from one day to another during the embryonic development. The incubated egg can be considered as a physical (thermal) system, which transfers energy (heat) down a potential gradient (temperature difference). The heat flow between the micro-environment and the eggshell under a thermal driving force (temperature difference) has been studied in the past by using the analogy to the flow of electric charge under an electromotive-force. In this work, the thermal-response of incubated eggs to a step-increase in ambient-air temperature is studied and modelled. It is shown that the incubated egg is reacting as a first-order system between embryonic days ED01 and ED13, while, starting from ED14, the egg is reacting as a second-order system. This extends the existing RC (resistor–capacitor) circuit analogue to an RLC (resistor–inductor–capacitor) circuit analogue at the later stage of incubation. The concept of considering the fertile egg and its surrounding environment as an energy-handling device is introduced in this paper. It is suggested that the thermoregulation of the embryo has a thermal induction-like effect starting from ED14 and increasing gradually till hatching.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Thermal Biology - Volume 44, August 2014, Pages 14–19
نویسندگان
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