Authors:E. Kovács, Z. Kristóf, R. Perlaki, and D. Szőllősi
The colour of green (ripeness stage I), pit hardening (II), light red (a, b) (III, IV), red (V) and dark red (VI) sour cherry fruits (
cv. Kántorjánosi) were characterised by CIELAB L*, a* and b* values. L* and b* decreased as a function of ripeness, a* intensively increased between green (I) and pit hardening (II) stages. The cell wall of green fruit was intact, but the electron dense cytoplasm concentrated along the cell wall and showed a number of degradation signs. The pit hardening stage (II) resulted in more structural break down in the cytoplasm and in the cell wall. Large numbers of plastoglobuli were in the plastids resulting in chloroplast-gerontoplast conformation. The most striking feature of light red fruits is the dissolution of the walls. Middle lamellae almost completely disappeared. In ripe fruits, the wall degradation was even more prominent. The regular structure of the cytoplasm had almost completely disappeared. The total pectin content between pit hardening and light red stages was the highest. The autolysis of pectin increased between pit hardening (II) and light red-a stage (III), then it slowly decreased. The largest activity of β-galactosidase was in the green (I) stage, and then in the pit hardening stage (II) it suddenly decreased. In light red-a/b (III/IV) stages the activity of β-galactosidase again started to increase. The activity of polygalacturonase did not depend on the grade of ripeness.
In the first period of storage, the activity of β-galactosidase and polygalacturonase of sour cherry decreased, then in the second period of storage increased.
Authors:Zs. Fajcsák, V. Kovács, A. Gábor, T. Szamosi, and É. Martos
This is a preliminary report on the benefit of a weekly low glycemic load (GL) diet intervention designed to positively effect body weight (BW) and body composition by reducing satiety in overweight/obese (BMI=28.38±5.86 kg m
) pre-pubertal children over a 12-week period. Thirteen otherwise healthy (11.46±1.94 years) children participated in the study. The low GL diet intervention included attending a weekly nutrition consultation, exchanging of at least 50% of the high glycemic index (GI) foods with low GI foods in the diet and portion control. Dietary changes were made based on weekly 4-day food-diaries over the 12-weeks. There were significant reductions in BW (68.08±22.03 vs. 65.64±22.12 kg), body mass index (BMI; 28.38±5.86 vs. 27.09±6.2 kg m
), fat mass (26.02±12.8 vs. 23.64±12.8 kg) % body fat (36.82±6.1 vs. 33.81±7.4), and circumference measurements; waist (95.73±14.01 vs. 90.76±14.26 cm); hip circumference (97.23±13.37 vs. 93.34±18.80 cm); thigh circumference (59.08±7.9 vs. 56.80±8.1 cm). The significant reduction of self-reported hunger level (3.46±0.92 vs. 1.51±1.11) was also observed. The 12-week low GL diet seems to be a practical, effective approach to treat obesity in children.
Authors:V. Kovács, Zs. Fajcsák, A. Gábor, and É. Martos
This paper examines the effect of breakfast skipping on weight status and abdominal obesity in urban school children. A cross-sectional survey was distributed to all primary schools (n=18) in Óbuda, Budapest. A total of 3714 students (1860 boys, 1854 girls; age range: 7–15 years) were involved. Height, weight and waist circumference (WC) were measured. Data about obesity-related dietary habits (breakfast skipping, fruit and vegetable intake, number of meals, soft drinks consumption) were collected via self-administered questionnaire. One-fifth (21.3%) of the participants were regularly skipping breakfast. Frequency of regular breakfast decreased with age. Breakfast skipping was predictive for higher body mass index (BMI) and WC in a model that was adjusted for age, gender and all studied nutritional factors. Confirming these results, both BMI (19.3±4.0 vs. 18.1±3.7 kg m
; P<0.001) and WC (67.3±12.0 vs. 63.9±10.8 cm; P<0.001) were higher among breakfast skippers than in breakfast eaters. Odds ratios for breakfast skipping for being obese or abdominal obese were 1.59 (95%CI: 1.12–2.26) and 2.04 (95%CI: 1.57–2.65), respectively. Although prospective studies are needed to verify the causality between breakfast skipping and obesity, our findings support the importance of promoting regular breakfast consumption among school children.
Authors:Z. Bódi, P. Pepó, A. Kovács, É. Széles, and Z. Győri
The role of special corns in human diets is increasing as a result of their favourable nutritional values. Little is known about mineral contents of different red and blue corns, although they may help to inhibit deficiency diseases mainly in the developing countries. During this study, mineral contents (15 elements) of 3 red and 9 blue corn varieties were examined with ICP-OES and ICP-MS. Highest contents of macroelements were as follows: P (3859.5±562.1 mg kg
), K (4325.0±469.5 mg kg
) and Mg (1450.0±104.6 mg kg
) in the variety Black Mexican, S (1555.0±128.6 mg kg
) in Santo Domingo Blue. In case of microelements, iron, zinc and selenium were highlighted. Except one genotype, iron contents were above 30 mg kg
. Blaumais, Hopi Turquoise and Hopi Blue contained more than 40 mg kg
(41.0–46.3), which were above values published in the literature (10.0 mg kg
in average). For zinc, we measured 15.2–31.5 mg kg
. Selenium contents (0.1–0.2 mg kg
) were also higher than in the literature (0.08 mg kg
). Plant selection could utilize variability of special element contents in enhancing these phenomena.
Phenoloids with allelopathic effect (juglone, ctaechin, tannin, gallic acid t-cinnamic acid, caffeic acid, coumarin, thymol, salicin in 1mM concentration) cannot be detected after the absorption from the acceptor plant (bean) by the applied selective analytical method (TLC densitometry). Their localisation can be determined by histochemical reagens (ferrichloride, potassium bichromate, sodium hydroxide). In the foliage leaves and excised bean plants they are present mainly in the parenchymatuos elements of the vascular tissue already on the 3rd day, at the beginning of wilting. Some substances (tropanes) out of the studied allelopathic alkaloids (atropine, scopolamine, belladonnin, tropine and caffeine) can be detected only in small amounts (7-8%) or only in traces in the leaf. Others (e.g. caffeine) accumulate in substantial amount (almost 200%) in their original form. Alkaloids,as well as phenoloids, can be detected in lesf tissue by histochemical methods (Dragendorff and Meyer reagents).
Authors:T. Valasek, E. Vágó, ZS. Danielisz, M. Babka, and É. Kovács
The purpose of the present cross-sectional study is to examine the degree of degenerative patho-anatomical changes in the thoracic vertebrae in asymptomatic adult patients.
Materials and Methods
A total of 150 adult patients were examined with computed tomography (CT) because of various health conditions (e.g., tumour risk). The images were revised with post-processing procedures to detect bony changes in the thoracic vertebrae. Three types of degenerations (osteophytes, arthrosis, and irregular endplates) were examined and graded using appropriate grading systems. Correlational investigations were carried out in relation to age, BMI, and degenerations. Moreover, to examine the value of the degenerations the frequencies of the grading categories were assessed in each segment.
The total number of the patients included was 41, who had no trunk symptoms. We found no convincing correlations in terms of age, BMI, and degenerations, however, age and facet joint arthrosis showed a tentative association. The degree of the degenerations was the largest in the Th7-8, Th8-9, Th9-10 segments for osteophytes, in the Th4-5, Th5-6 for arthrosis, and in the Th8-9, Th9-10 for irregular endplates.
This study found that there are several progressive degenerative changes in the thoracic spine without any clinical symptoms. Accordingly, it can be advised that clinicians should avoid labelling the disorders and planning their treatment based on the results of diagnostic imaging only.
Authors:E. Kovács, S. Siddiqui, Z. Kristóf, M. Tóth-Markus, and E. Róth
Colour (L*, a*, b*, h
and chroma), β-galactosidase, polygalacturonase (PG) activity, pectin content, ultrastructure and volatile compounds were determined, in mature green and in yellow ber fruits (
Lamk. cv. Umran).The L* did not, but a*, b* and h
significantly differed between mature green and yellow ber fruit. The pectin content and its solubilization (soluble pectin and neutral sugars), the activity of PG was higher in yellow ber fruits and in the outer part of fruits. Activity of β-galactosidase was higher in mature green ber fruits. The cell walls of mature green fruits were usually homogeneous, the density of the middle lamellae decreased in yellow bers, and at the same time, the structure of chloroplastids disintegrated. The aroma of yellow ber is characterized by the presence of even carbon number of ethyl esters from C4 to C14.
Authors:E. Várvölgyi, Sz. Kozits, J. Soós, D. Szöllősi, Z. Kovács, and A. Fekete
Efforts have been made to predict the sensory profile of coffee samples by instrumental measurement results. The objective of the work was to evaluate the most important sensory attributes of coffee samples prepared from ground roasted coffee by electronic tongue and by sensory panel. Further aim was to predict the Arabica concentration and the main sensory attributes of the different coffee blends by electronic tongue and to analyze the sensitivity of the electronic tongue to the detection of poor quality coffee samples. Five coffee blends with known Arabica and Robusta concentration ratio, five commercially available coffee blends and a poor quality coffee were analyzed. The electronic tongue distinguished the coffee samples according to the Arabica and Robusta content. The sensory panel was able to discriminate the samples based on global aroma, bitterness and coffee aroma intensity (p < 0.01). The Arabica concentration was predicted from the electronic tongue results by PLS with close correlation and low prediction error. Models were developed to predict sensory attributes of the tested coffee samples from the results obtained by the electronic instrument.
Authors:É Kovács, I Jónásné Sztruhár, L Mészáros, ZS Gyombolai, A Simon, and V Farkas
Reduced functional mobility is a risk factor for falls. The Timed Up and Go test is a complex measurement tool for functional mobility. Our aims were to assess the functional mobility of: (a) community-living elderly who were participating in an exercise programme (n = 40; mean age = 73.7 years), (b) community-living elderly who were physically inactive (n = 40; mean age = 74.1 years), and (c) institutionalized elderly (n = 40; mean age = 73.5 years) and to compare the results with cut-off values for risk of fall.
Materials and methods
After measuring functional mobility, one-way independent ANOVAs and sample t-tests were used for analysis.
The functional mobility of the active participants was better than that of the inactive (p < .001) and institutionalized participants (p < .001). There was no significant difference between the inactive and institutionalized participants (p = .990). The functional mobility of the active participants was better, whereas the functional mobility of the inactive participants was worse than the cut-off value of 13.5 s for risk of fall for community-living elderly. The functional mobility of the institutionalized participants did not differ from the 15-s reference value for predicting risk of fall.
The results indicate that regular physical activity has a positive effect on maintaining functional mobility among both community-living and institutionalized elderly individuals.
Authors:R.L. ErdŐs, I. Jónásné Sztruhár, A. Simon, and É. Kovács
Decline of the sensory and motor systems in older people negatively affects postural control. This increases the risk of falls, which is dangerous for older people in long-term care. Being aware of the quality of postural control and the factors affecting it among elderly people, is crucial in implementing an effective fall-prevention program. This study aimed to measure postural control and the demographic, health-related, and functional factors presumed to be correlated with it among nursing home residents. Another aim was to find valid screening tools based on these factors.
Materials and methods
Seventy one nursing home residents were included. Postural control was measured using the Berg Balance Scale. Grip strength, the 30-s chair stand test, and the Timed Up and Go test were used to measure global muscle strength, and functional mobility, respectively. The results of these functional tests were dichotomized using age-specific reference values.
Postural control was significantly worse in those who did not reach the age-specific reference values in any of the three functional tests. Effect sizes were large for functional mobility and medium for muscle strength. Multimorbidity and gender had no effect on postural control in our sample.
Among nursing home residents, postural control is related to functional mobility and muscle strength. Thus, routine testing of these skills among elderly people is an important task of the physiotherapist.