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; Smith et al., 2016 ; Steward, Miranda-Olivos, Soriano-Mas, & Fernández-Aranda, 2019 ) . Multiple neural systems are believed to be involved in delay discounting, including those implicated in assigning value (the ventral striatum and ventromedial
Abstract
Non-isothermal differential scanning calorimetry (DSC) experiments were performed to study the kinetics of the curing process of mixtures of diglycidylether of bisphenol A (DGEBA) and γ-butyrolactone (γ-BL) with ytterbium triflate as an initiator. It can be deduced that the cured material consists of epoxide homopolymers with incorporated poly(ether-ester) unities, which come from the lactone incorporated into the network. The kinetic parameters, obtained using the non-isothermal isoconversional procedure, show not only the importance of the proportion of initiator but also the influence of γ-butyrolactone on the polymerization of DGEBA. The homopolymerization of DGEBA catalyzed by ytterbium triflate has an activation energy of 85.3 kJ mol−1, which decreases to 68.2 kJ mol−1 in the presence of γ-butyrolactone forming copolymers. Analysis from DSC and FTIR data showed that, when the proportion of ytterbium triflate was increased, the reaction process accelerated and the mechanism of the cationic non-linear polymerization named activated monomer (AM) became more evident than the activated chain-end mechanism (ACE). Finally, the activation energies and the pre-exponential factors were determined for both mechanisms.
Wheat gluten is mainly responsible for the structural characteristics of bakery products. When studying wheat proteins, it is important to use reliable extraction methods. Four different methods of wheat protein extraction were studied, with emphasis on the glutenin-rich fractions. The final quality of the protein fractions was evaluated in terms of denaturation, indirect yield, molecular weight, secondary structure, and thermal profile. Our results indicate that addition of dithiothreitol improves glutenin extraction without interfering with protein secondary structure and denaturation. Different thermal profiles were evidenced for different extraction methods, indicating the selectivity of the processes. Denaturation temperatures of the samples showed differences within about 3 °C, while denaturation enthalpies (ΔH) differed by about 14 kJ µg−1. Data in this paper may provide a broader perspective on how wheat proteins are affected by the extraction method.
The work describes the effects of cimetidine on stress-induced gizzard erosions (Experiment A) and the influence of the long-term application (42 days) of the same drug on weight gain and feed consumption during broiler fattening (Experiment B). For Experiment A, 60 male, three-day-old chicks were divided into two groups: C (n = 30) - control chicks treated with 0.5 ml saline; CIM (n = 30) - chicks treated with cimetidine in a dose of 5 mg/kg body weight (b. w.) in-tragastrically. All chicks were stressed using a modified water-immersion stress method according to which the chicks, after 24 h of feed deprivation, were immersed in tap water (17 °C) for a few seconds. Under chloroform anaesthesia ten chicks from each group were killed 1, 2 and 3 h after the stressing. The morphometric analysis of gizzard erosion (GE) and histopathological examinations of gizzards were performed for each chick. In Experiment B, 32 one-day-old broilers of both sexes were used. The control group was untreated (n = 16) while the CIM group (n = 16) was fed the same diet supplemented with 10 mg of cimetidine per kilogram of feed throughout the fattening period (42 days). The results of Experiment A showed decreased mean length of the GE in the cimetidine-treated birds as compared with the GE lesions of the controls. In Experiment B, the treated chicks had reduced liveweight (1835.1 g), carcass weight (1474.6 g) and increased feed consumption (2115 g of feed per kilogram of weight gain) compared to the controls in which the same parameters were 1898.5 g, 1574.2 g and 1797 g, respectively. The results show that while stress-induced GE of chicks can be medicated pharmacologically, long-term application of the same substance impairs the results of fattening.
threshold was recorded. Furthermore, VO 2max as well as the Maximal Aerobic Speed (MAS) were determined. The main criteria to determine VO 2max was the presence of a ‘plateau’ in the VO 2 curve at the end of the test; when this ‘plateau’ did not exist, a
in the Table 1 . The fourier transform infrared (FTIR) studies were carried out on the Digilab FTS60s spectrometer in MIR range (400–4000 cm −1 ). The samples were prepared in the form of KBr pellets. The 31 P MAS-NMR spectra were
A lélek képalkotói és laborvizsgálatai. A projektív tesztek és a kérdőívek integrált alkalmazása a gyermek és serdülő pszichodiagnosztikában
The imaging techniques and laboratory test of psyche. The integrative practice of projective measures and questionnaires in child and adolescent psychodiagnostics
projektív tesztek látszólag más és más irányba mutatnak. A gyermekek és a serdülők diagnosztikájában szerzett tapasztalataink alapján ilyenkor súlyos pszichiátriai probléma vagy gyakran személyiségzavar irányú személyiségfejlődés állhat a háttérben. A
