Wykorzystanie emisji biofotonów do parametryzacji jakościowej produktów spożywczych Streszczenie W badaniach podjęto próbę określenia możliwości wykorzystania zjawiska opóźnionej luminescencji materii organicznej do oceny jej właściwości istotnych z punktu widzenia prozdrowotnego jej wykorzystania. W celu realizacji eksperymentu zbudowano stanowisko pomiarowe wyposażone z fotopowielacz służący do identyfikacji fotonów emitowanych przez wzbudzaną optycznie materię organiczną. Proces pomiaru liczby emitowanych biofotonów odbywał się automatycznie do czego wykorzystano środowisko programowania LabView. Odnotowano zróżnicowanie liczby biofotonów w obrębie badanych grup produktów spożywczych, stwierdzenie to dotyczy produktów finalnych oraz składowych stanowiących ich recepturę. Zaobserwowano, że istnieje praktyczna możliwość różnicowania materii organicznej pod względem stopnia emisji biofotonów.
Color evaluation, using its numerous parameters, was applied to assess qualitative changes of products resulting from the use of specific technological treatment. The study investigates the possibility of using the CIE (Comission Internationale de l’Eclairage) L*a*b* (components describe color: L - luminance, a - green to magenta color, b - blue to yellow color) method to determine selected color coefficients of fried potato products. Statistical analysis of the results was performed at the assumed significance level of α = 0.05. It was demonstrated that the method proposed (CIE L*a*b*) is effective in evaluating the color of french fries modified with the use of raw material exposed to ultraviolet radiation in the C band.
Fruit and vegetable harvest efficiency depends on the mechanization and automation of production. The available literature lacks the results of research on the applicability of pneumatic end effectors among grippers for the robotic harvesting of strawberries. To determine their practical applications, a series of tests was performed. They included the determination of the morphological indicators of the strawberry, fruit suction force, the real stress exerted by fruit suckers and the degree of fruit damage. The fruits’ morphological indicators included the relationships between the weight and geometrical dimensions of the tested fruit, the equivalent diameter, and the sphericity coefficient. The fruit suction force was determined on a stand equipped with a vacuum pump, and control and measurement instruments, as well as a MTS 2 testing machine. The necrosis caused by tissue damage to the fruits by suction cup adhesion was assessed by counting the necrosis surface areas using the LabView programme. The assessment of the necrosis was conducted immediately upon the test’s performance, after 24 and after 72h. The stress values were calculated by referring the values of the suction forces obtained to the surface of the suction cup face. The tests were carried out with three constructions of suction cups and three positions of suction cup faces on the fruits’ surface. The research shows that there is a possibility for using pneumatic suction cups in robotic picking heads. The experiments performed indicate that the types of suction cups constructions, and the zones and directions of the suction cups’ application to the fruit significantly affect the values of the suction forces and stresses affecting the fruit. The surface areas of the necrosis formed depend mainly on the time that elapses between the test and their assessment. The weight of strawberry fruit in the conducted experiment constituted from 13.6% to 23.1% of the average suction force.
Assessment of the colour with the use of many parameters is used with reference to evaluation of the quality changes of products resulting from application of specific technological treatments. The paper investigates the effect of relations between parameters of irradiation of potato bulbs with UVC on selected coefficients of assessment of the colour of fries determined with CIE L*a*b* method. It was statistically significantly proved that UV-C radiation affected brightness of fries, change in colour, recognition of the difference in colour and intensity of the colour reception. Statistical analysis of results was carried out at the assumed level of significance α=0.05.
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