An automated twin-calorimeter has been developed for the analysis of relatively small sample series which is suitable for the simple and fast analysis of fertilizers. The apparatus was given the name AGROTHERM
The thermal decomposition of [Co(NH3)5CO3]NO3, [Co(NH3)5NO2](NO3)2 and [Co(NH3)5H2O](NO3)3 complexes was studied by simultaneous TG, DTG, DTA (Derivatograph-C), termogastitrimetry, continuous selective water detection, TG-MS, and XRD methods.
Authors:T. Kovacs, E. Bodrogi, J. Somlai, P. Dombovari, G. Horvath and Cs. Nemeth
A frequently used method in determining the radium concentration of water is the radon emanation method. When radon gas is transferred to the Lucas-cell usually CaCl2 is used to remove the water traces. When we measured the background of the system using ultra clear distilled water the results were astonishing. The detailed investigation has shown that the unwanted radon originated from the CaCl2, contained about 1000 Bq/kg of 226Ra. Depending on the time interval between two measurement, the radon deriving from the CaCl2 disturbed the measurements.
Authors:G. Bálint, P. Than, I. Domán, N. Wiegand, G. Horváth and D. Lőrinczy
Meniscus degeneration is a very frequent disease of human beings mainly in the developed countries. The ability of the meniscus
to participate in load bearing, shock absorption, joint lubrication, and joint stability depends on the maintenance of its
structural integrity. Therefore the pathology of the degeneration has been subject of many publications before. These studies
all agreed that the grade of the degeneration correlated with the patient’s age, weight, profession, and athletic activity
. These reviews also described the biochemical changes in the structure, too [2, 3].
In the current study authors examined degenerated human meniscus with differential scanning calorimetry and demonstrated thermal
differences between healthy and intraoperatively removed pathological samples.
Authors:Z. Szántó, L. Benkő, B. Gasz, G. Jancsó, Ö. P. Horváth and E. Rőth
Resection and subsequent end-to-end anastomosis of the windpipe is a tried-and-tested acceptable method for the surgical treatment
of segmental defects. There are a variety of different techniques for tracheal end-to-end anastomosis, but controversial reports
highlight the fact that the suturing technique of the anastomosis is still subject of debate. We aimed to show the postoperative
effects of the continuous and simple interrupted suturing technique respectively on the tracheal cartilage using differential
scanning calorimetry. Transsection and subsequent reanastomosis of the cervical trachea was performed in 14 adult beagle dogs.
The trachea was anastomized with continuous or simple interrupted sutures respectively depict no change in microcirculation
after the resection of the trachea, but significant decrease following the completion the anastomosis with continuous sutures.
Conventional histological analysis did not show any marked postoperative change in the tracheal cartilage but our DSC scans
clearly demonstrated the differences between the intact cartilages and the ones involved in the anastomosis.
Authors:Sz. Lehel, G. Horváth, I. Boros, P. Mikecz, T. Márián and L. Trón
5-Deoxy-5-[18F]fluoro-adenosine was synthesised by nucleophilic radiofluorination reactions of 5-deoxy-5-haloadenosines. The homogeneous isotope exchange in 5-deoxy-5-fluoro-adenosine was also investigated. The conversion of these reactions was found to be rather low and depends on the strength of the halogen-carbon bond: 0.248% for chloride-, 0.488% for bromide- and 1.070% for iodide-derivative; there was no reaction observed in the case of fluoro-compound.
Authors:S. Gál, K. Tomor, E. Pungor, G. Soóki-Tóth and P. Horváth
Reactions of binary and ternary alkali metal carbonate mixtures with aluminium oxide were studied by means of a derivatograph under different conditions. Reaction products were identified by X-ray diffraction.
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.