Authors:A. Soós, L. Somogyi, G. Jakab, and B. Imre
The role of fats in food technology is mainly to develop the desired consistency. The simplest way to reach this goal is the blending of different fats. The aim of our work was to study the solidification and melting properties of blends of coconut oil and anhydrous milk fat. Pure fats and their 25–75%, 50–50%, and 75–25% blends were investigated. Melting profile and isotherm crystallization were measured by pNMR. Non-isotherm melting and solidification were detected by differential scanning calorimetry (DSC). Possible applications of the blends were established. Results show that AMF and coconut oil has limited miscibility, which is dependent on the temperature. Below 22 °C AMF is the softening component, above 22 °C the effect is inverse. Coconut oil accelerates solidification of AMF, however, basic crystal forms of AMF remained.
Authors:Szilvia Stranczinger, A. Borhidi, J. Szentpéteri, and F. Jakab
Phylogenetic relationships among some
(Rubiaceae, Gardenieae) taxa were estimated based on sequence variation in the nuclear ribosomal internal transcribed spacers (ITS) and
16 intron (cpDNA). During the investigation of
16 intron of 9 studied Central American
species, two well supported subclades were separated. Analysis of ITS data of 16
species shows 3 major clades. A group of mainly lowland, South American
species is moderate supported (75%). Species from Mexico form a strongly supported (97%) clade, but the Central American and Mexican
species are low supported (58%). However the last two groups are well supported together (95%). The molecular delimination is well in line with the size of leaves combined with the texture of exocarp.
Authors:Nikolette Szücs, Ibolya Varga, A. Patócs, M. Tóth, Csilla Jakab, Edit Gláz, and K. Rácz
To study the usefulness of 6β-hydroxycortisol (6βOHF) measurements for assessing hepatic drug metabolizing enzyme activity, plasma 6βOHF and cortisol were measured in 22 patients with alcoholic liver disease after at least 2 weeks of alcohol abstinence, in 5 patients with severe Cushing's syndrome and in 12 healthy non-drinker subjects. Blood samples were drawn under resting conditions during midnight, in the morning at 0800 h, after a 1-mg overnight dexamethasone test and after ACTH administration. Plasma cortisol and 6βOHF were determined with radioimmunoassay. In patients with alcoholic liver disease, the plasma cortisol levels at midnight and 0800 h, as well as after the administration of dexamethasone and ACTH were not different from corresponding values measured in non-drinker controls. In addition, these patients with alcoholic liver disease had similar plasma 6βOHF levels at midnight, 0800 h and after dexamethasone administration as compared to corresponding values in controls. By contrast, ACTH administration in patients with alcoholic liver disease resulted in a significantly (p<0.05) larger increase of plasma 6βOHF (from 106±22 to 1102±106 ng/dl, mean ± SE) as compared to that found in controls (from 74±3 to 337±76 ng/dl). The markedly increased 6βOHF response to ACTH administration in patients with alcoholic liver disease was similar to that measured in patients with severe Cushing's syndrome, in whom increased and non-suppressible plasma cortisol levels were accompanied by markedly elevated plasma 6βOHF levels. These results indicate that alcohol abstinence in patients with alcoholic liver disease is associated with an exaggerated 6βOHF response to ACTH and that this abnormality may prove to be a clinically useful parameter for a sensitive detection of altered drug metabolism present in these patients.
Authors:J. Németh, B. Jakab, R. Józsa, T. Hollósy, A. Tamás, A. Lubics, I. Lengvári, P. Kiss, Zs. Oberritter, B. Horváth, Z. Szilvássy, and D. Reglődi
Pituitary adenylate cyclase activating polypeptide (PACAP) is a widely distributed neuropeptide that has two molecular forms
with 38 and 27 amino acid residues. The aim of the present study was to develop a new, highly specific PACAP-27 assay to investigate
the quantitative distribution of PACAP-27 in the central nervous system of various vertebrate species applying the same technical
and experimental conditions. Our results show that the antiserum used turned to be PACAP-27 specific. The average ID50 value was 51.5±3.6 fmol/ml and the detection limit was 2 fmol/ml. PACAP-27 immunoreactivity was present in the examined brain
areas, with highest concentration in the rat diencephalon and telencephalon. Swine and pigeon brain also contained significant
amount of PACAP-27. Our results confirm the previously described data showing that PACAP-38 is the dominant form of PACAP
in vertebrates, since PACAP-38 levels exceeded those of PACAP-27 in all examined brain areas. Furthermore, our study describes
for the first time, the comparative quantitative distribution of PACAP-27 and-38 in the swine and pigeon brain.
Authors:Daniela Šátková-Jakabová, J. Trandžík, Ľudmila Hudecová-Kvasňáková, Erika Hegedüšová-Zetochová, A. Bugarský, J. Buleca Jr., L. Zöldág, F. Jakab, and P. Fľak
Genetic variation at six microsatellite loci was analysed for five Thoroughbred subpopulations to determine the magnitude of genetic differentiation and the genetic relationships among the subpopulations. Significant deviations from Hardy-Weinberg equilibrium were shown for a number of locus-population combinations, with all subpopulations. The genetic diversities and relationships of five Thoroughbred subpopulations were evaluated using six microsatellites recommended by the International Society of Animal Genetics (ISAG). The allele frequencies, the effective numbers of alleles, and the observed and expected heterozygosities were calculated. POPGENE v. 1.31 (Yeh et al., 1997) was used to test for deviations from the Hardy-Weinberg (H-W) equilibrium and to assign FIS estimates (Weir, 1990). The utility of microsatellites for evaluating genetic diversity of horses is discussed.