Periphyton spamles from the reed-belt and phytoplankton samples were taken in November 1996 and in January, April, July 1997 at the upper part of the Soroksár-Danube (the second largest side arm of river Danube in Hungary) at Taksony, and in July, November 1998, January, April 1999 at the middle part of the side arm at Ráckeve. The aim of this study was to investigate the seasonal and vertical distribution of periphyton growing on old and green reed stemps at both parts of the side arm, focussed on taxonomic composition, abundance and chlorophyll a content. Based on the chloropyll a content of the phytoplankton the upper part of the side arm at Taksony was oligotrophic in November an July (in July caused by a flood), mesotrophic in Januray and eutrophic in April. The middle part of the Soroksár-Danube was eutrophic in April and July, oligotrophic in November and January at Ráckeve The values of abundance and chlorophyll a of periphyton were the highest at the middle part of Soroksár-Danube, while that of phytoplankton was the highest at the upper part. A few diamonts showed the same distribution along the reed stems. Relative abudance of Amphora libyca, Cocconeis placentula and Eunotia arcus increased close to the bottom, while that of Fomphonema minutum, G. paravulum, Navicula capitatoradiata and Nitzschia dissipata decreased.
Authors:D. Kozma, L. Poszáváca, Mária Ács, G. Pokol, and E. Fogassy
The diastereoisomeric salt pair formed between α-phenyl-ethyl-amine and R-1-phenylethylsuccinamic acid were investigated by
physico-chemical methods. Melting and solubility phase diagrams were determined, the coincidence of the eutectic points of
the two phase diagrams were demonstrated. The large difference in physico-chemical properties of the salt pair explains the
efficient enantiomer separation.
Authors:J. Madarász, D. Kozma, G. Pokol, M. Ács, and E. Fogassy
Chiral drugs are generally resolved through formation of diastereoisomeric salts of different solubility. When the diastereoisomer
salts from a eutectic in the solid phase, a good estimate can be made for the efficiency of the resolution (S), through a calculation based on the eutectic composition (xeu). The eutectic composition can be computed from thermal data of a differential scanning calorimetric (DSC) measurement of
the diastereoisomeric salts .
In this work we investigated the influence of uncertainties of thermal data on the estimation of the efficiency of resolution
(S), spreading throughout the calculations involved. Performance of our error-estimating method is demonstrated on 6 diastereoisomer
salt pairs. The obtained deviations are close to the deviations of resolution experiments. Thus, it can be concluded that
the DSC measurements are useful means in predicting the efficiency of resolutions.
Authors:B. Langó, L. Bóna, E. Ács, and S. Tömösközi
Traditionally, triticale is mainly used as animal feed, the use for human utilization is still uncertain. However, in the past few decades, importance of triticale is increasing globally. Therefore, the determination of nutritionally important parameters of triticale and study of their genetic and environmental (G×E) variability have essential importance. In this study, ten hexaploid triticales along with reference wheat and rye varieties were grown at two locations in Hungary in a three-year-long experiment. Crude protein (8.6–16.3%), crude fat (0.86–1.98%), starch (57.6–65.0%), and dietary fibre values (7.5–13.7%) showed notable differences, significant genotype control were detected in all tested parameters except ash content (1.42–2.10%). The analysis of variance confirmed that crop year affected all traits, and also location had significant effect on the formation of protein and – to a lesser extent – the fibre levels. Furthermore, interactions between the effects were observed. Generally, nutritional characteristics of triticales were positioned between wheat and rye in this experiment; however, there were notable differences between the genotypes, and also the magnitudes of environmental effects were significant. Nutritional values of triticale provide a prospect for food production and human consumption.
Authors:L. Ş. Péterfi, L. Momeu, K. T. Kiss, and É. Ács
Plankton samples collected from a yellow watered bog pool of the mesotrophic “Călăţele Pădurii” peat bog (Romanian Western Mountains, Transylvania), exhibited an outstandingly rich Mallomonas population. The observations carried out by light and scanning electron microscopy revealed that the population belongs to Mallomonas intermedia Kisselev. Based on the presence of lance head bristles, distributed all over the cell armour (except few anterior collar, unilaterally serrated ones), it became evident that the population belong to the nominate variety (var. intermedia). Mallomonas intermedia var. saliceaensis formerly described from Transylvania differs by the type variety by the presence of exclusively serrated bristles. The present finding proved that Mallomonas intermedia could not be properly identified at infraspecific level solely based on the ultra structure of scales, without knowing the structure of bristles, too.
Authors:Katalin Nemák, Mária Ács, D. Kozma, and E. Fogassy
The phenomena of conglomerate formation-racemic compound formation were investigated in a series of five (N-alkyl)-2′,6′-pipecoloxylidides. The optically active enantiomers were prepared by optical resolution of the racemates using 2R,3R-tartaric acid and 0,0′-dibenzoyl-2R,3R-tartaric acid as resolving agent. By DSC measurement of the racemates and the enantiomer the binary phase diagrams were determined.
The aim of this study is to present a situation assessment within the framework of a comprehensive study of the social services for people with mental illness in Hungary. After setting the historical background, we describe in detail the current services, their anomalies, and the ongoing implementation of a strategy to deinstitutionalize them.
Materials and methods
We reviewed the related academic literature and systematically collected and elaborated upon legal documents, decisions, and data from national databases.
We established that a paradigm shift is taking place in the social care of people with mental disorders in Hungary. The lack of human resources, the paternalistic, institution-centered attitude, the mass supply of social services in dilapidated buildings, and the stigmatization of patients are among the greatest problems. Cooperation between the health and social sectors is inadequate and, in the interests of patients, needs to be improved.
Hungary needs a complex, integrated, health-and-social-care supply system for people living with mental illness, one that takes into account both personal needs and assistance to recovery. In the continuation of the deinstitutionalization process, emphasis should be placed on social sensitization.
Benthic diatom investigations of some Hungarian streams have been carried out in order to find reference sites in assistance to the ecological quality analysis of the different river types according to the Hungarian river typology. On the basis of the coevaluation of biological and chemical parameters, among the investigated streams, some part of Kemence stream seems to be the appropriate reference site for the classification of the highland, siliceous rivers of Hungary. However, further invastigations are needed for the selection of reference sites for the other types of Hungarian river typology. This is the most difficult in the case of lowland rivers, which are exposed to more severe anthropogenic impacts. Important is the question which biological parameters should be investigated and considered when assessing the ecological condition of our waters. In the United States, e.g. the assessment of the relative abundance of Achnanthidium minutissimum is quite widespread (Stevenson and Bahls 1999), the extent of which indicates the level of disturbance. The use of this method is hampered, on one hand, by the fact that A. minutissimum is an early coloniser species which means that if we do not take samples from mature periphyton, we might find it dominant simply because of that, and, on the other hand, that distinguishing between the species varieties is not always unambiguous under light microscope because of its small size, and these can have different ecological needs. It is also recommended to calculate species richness, diversity and evenness (Stevenson and Bahls 1999), but based on our investigations these parameters are not in correlation with water quality. Investigation of other diatom features such as tolerance and sensitivity, some autecological parameters (as it was applied and recommended by Fore and Grafe 2002 for investigating the reaction of diatom associations to anthropogenic disturbances) might also be useful in completing the water quality analysis of rivers, however, these methods need further investigations. Some of the indices (EPI-D, IPS, IBD) calculated with the software Omnidia are suitable for the classification of our rivers, but the investigation of more rivers, flowing through different types of stone are necessary to choose the appropriate indices. The reason for this is that the different indices work with a different register of species and obviously those indices will prove to be suitable the species register of which shows the highest similarity to the diatom associations of the certain water type.
Authors:L. Bóna, N. Adányi, R. Farkas, E. Szanics, E. Szabó, Gy. Hajós, A. Pécsváradi, and E. Ács
Selenium (Se), a main antioxidant component in cereal grain, is essential for animals and human health reducing risk factors of many dangerous diseases. Over the past decades, intake of this trace element had dropped due to low Se content in large areas of European countries including Hungary. Se-rich, high-protein cereal products became a focus for both animal feed and human consumption. In the study, we examined the following: i) grain Se concentration of wheat (
L.) and triticale (
Wittm.) intake to detect intra-and inter-genetic variations and ii) possible comparison relationship of this trace element to end product integrity, quality and relevant technological aspects. Se content of the whole meal grain was tested via atomic absorption spectroscopy (AAS). Despite generally poor Se soil content of the experimental area where samples were collected, significant differences were found for both species. In general, triticale contained higher Se concentration than wheat did. Spring type cereals had significantly higher grain Se and protein concentration than those of winter ones. Grain Se content showed positive correlation with magnesium, copper, zinc, manganese, tocopherol and crude protein concentration. Remarkable intra-specific variations were found in Se concentration, however in future, additional studies, methods and resources will be required for identifying ways of increasing Se content in cereal foodstuff and feed.