Method for determining the coalescence dynamics of gas vesicles forming in hydrated mixtures containing gluten proteins, preferably in wheat dough

摘要

determination of the dynamics of gas bubbles formed by koalescencji in hydrated mixtures containing protein glutenowe, especially in pastry wheat by setting growth rate radius spherical gas bubbles rrp /? (t) on the basis of measurements of the pressure p (t) and viscosity. (t) cake during expansion (t), according rrp /? (t) = p (t) / (4? (t)), and rrv (t),on the basis of measurements of volume v (t) and its growth rate rv (t) during expansion (t) and density niegazowej phase samples. and assuming their immutable numbers, according rrv (t) = 1 / (1 - (rv (t)) / (v (t) - 1 /?) ] 1 - 3 - 1, the test sample containing cake, raising agent, where measurements are made continuously, characterized by that,the sample weight initial me not more than 5 g, formed in the form of a disc is placed in the slot (1) of a width (h) of not more than 10 mm, formed between the plates grzejnymi (2, 2 ') attached to a measurement system reometru (3) and directly in the axis of symmetry of these h wafers (2, 2 ').from the start of measurement, raises the temperature of heating plates (2, 2 '), preferably at 1u00b0c - s - 1, until the question of good 130u00b0c, after which is maintained at that level until the end of the measurement.at the same time, raising temperature, subjected sample study in reometrze whose upper plate (2) carries out the movements rotacyjno - sanders, due to sinusoidalnie raised torque of fixed amplitude and non-destructive structure samples, with fixed frequency os cylacji not less than 1s - 1.during this test, the measurement system reometru (3) shall be recorded with the same frequency volume normal force fn (t), amplitude deformation u015bcinaju0105cego? a (t) and collects the diameter sample d (t) measured in half its thickness (h / 2) by at least four sensors (4) shipmentdistributed evenly around the sample and the results obtained are converted into volume v (t) and the rate of growth of the rv (t), the pressure p (t) and viscosity. (t), and with these values determined index speed koalescencji rci (t), with dependence: rci (t) = 1 - ((1 + rrp /? (t)) / (1 + rrv (t))] 3 and index koalescencji you (t) dependence: you (t) = 1 - (1 - 1 / f - rci (t0)) - (1 - 1 / f - rci (t0 + 1 / (f)).(1 - 1 / f - rci (t), where: f is the frequency of sampling, t0 is the time the expansion test.