approach, which takes into account the effects of family context on children’s and adolescents’ development ( Erel & Burman, 1995 ), and examines whether parental (fathers’ and mothers’) characteristics and quality of sex-related communication with children
Authors:Ningyuan Guo, Man Ping Wang, Tzu Tsun Luk, Sai Yin Ho, Daniel Yee Tak Fong, Sophia Siu-chee Chan and Tai Hing Lam
Evolving information and communication technologies (ICTs) have transformed family interactions by overcoming time and distance barriers. Greater perceived well-being was observed among families who used smartphone
This article explores the emergence of knowledge from scientific discoveries and their effects on the structure of scientific
communication. Network analysis is applied to understand this emergence institutionally as changes in the journals; semantically
as changes in the codification of meaning in terms of words; and cognitively as the new knowledge becomes the emergent foundation
of further developments. The discovery of fullerenes in 1985 is analyzed as the scientific discovery that triggered a process
which led to research in nanotubes.
Authors:Péter Igaz, Zoltán Nagy, Barna Vásárhelyi, Edit Buzás, András Falus and Károly Rácz
A génexpresszió poszttranszkripciós szintű szabályozásában alapvető jelentőségű mikroRNS-ek jelenlétét nemcsak intracellulárisan, hanem testfolyadékokban is kimutatták. A keringő mikroRNS-ek hormonszerű hatásokat fejthetnek ki, aminek révén távoli sejteket is befolyásolhatnak, így az intercelluláris kommunikáció mediátorainak tekinthetők. A szérumban, vizeletben, székletben, nyálban előforduló mikroRNS-ek szóba jöhetnek betegségek biomarkereiként, és intenzív kutatások folynak ezek hasznosítására. Érdekes következtetésekre adhat okot, hogy az anyatej is tartalmaz mikroRNS-eket, és nem zárható ki ezek alapján, hogy ezek a csecsemőre hatva az epigenetikai információ egyének közötti áramlását tehetik lehetővé. Még megdöbbentőbb az a nemrégiben született felismerés, hogy a táplálékban található mikroRNS-ek, így növényi mikroRNS-ek mutathatók ki a keringésben, és ezek az emberi/állati szervezetben is aktívak lehetnek. Mindezek alapján a mikroRNS-ek az egyének közötti, sőt fajok közötti génexpressziós/epigenetikai információáramlásban szerepet játszhatnak, ami a mikroRNS-ek jelentőségét és talán az egész természet működéséről, a betegségek kialakulásáról alkotott felfogásunkat is alapvetően módosíthatja. Orv. Hetil., 2012, 153, 1647–1650.
Authors:Anna Valkó, Ervin Albert, Attila Cságola, Tünde Varga, Krisztián Kiss, Rózsa Farkas, Zsuzsanna Rónai, Imre Biksi and Ádám Dán
Porcine epidemic diarrhoea virus (PEDV) is an emerging enteropathogen, causing great economic losses in the pig industry. After many years of quiescence, PEDV was detected in Hungary in 2016 with a recombination in its S gene. In order to determine the extent of this change, an attempt was made to isolate the recombinant PEDV. This study was extended with a variety of samples collected from three separate farms with newly identified PEDV in 2018. The recombinant PEDV from 2016 was isolated successfully along with three viruses from 2018, and one isolate from the new cases was used for whole genome determination. Whole genome sequence alignment revealed the highest identity with recombinant Hungarian and Slovenian PEDV within the low-pathogenic European viruses. This suggests that these recombinant PEDV are circulating in this area and may spread to other parts of the continent.
Authors:Zsófia Bohák, Ottó Szenci, Andrea Harnos, Orsolya Kutasi and Levente Kovács
Temperament has not been taken into account in previous studies evaluating the stress response to exercise in horses. The aim of the present study was to investigate the cortisol response in Thoroughbred racehorses to a single exercise bout, and to analyse the results based on the basic personality of the horse examined. Twenty healthy Thoroughbred horses were selected for the study based on a 25-item rating questionnaire survey used for characterising equine temperament. Eight temperamental and twelve calm horses took part in the experiment. The horses trotted as a warm-up activity, and then galloped on a rounded sand track. Blood sampling was conducted four times for each horse. Horses with a more excitable temperament showed a higher cortisol response to the test (P = 0.036). In conclusion, cortisol levels in response to a mild intensive exercise can be affected by temperament in horses. Serum cortisol may be a relevant marker to quantify individual temperamental differences in racehorses.
Authors:Boglárka Vincze, András Gáspárdy, Levente Kovács, Ervin Albert, Luca Kézér, Ferenc Baska and Ottó Szenci
Transabdominal ultrasonography has been shown to be a useful and reliable method for assessing fetal well-being in horses and cattle. To test the applicability of fetal aortic diameter measurement in cattle, 44 late-term pregnant cows and heifers were examined 21 to 0 days prior to calving. Mean fetal aortic diameter was 2.07 ± 0.14 cm and mean fetal heart rate (FHR) was 109 ± 17 bpm. Three dead calves were dissected and their aortic diameter was measured in a water bath. The mean birth weight (n = 44) was 39.9 ± 5.8 kg. There was a significant negative correlation between FHR and fetal aortic diameter. However, although some studies have shown that fetal aortic diameter strongly correlates with birth weight in near-term horses and cattle, in this study there was no correlation between fetal aortic diameter and birth weight in Holstein-Friesian cows and heifers irrespective of whether the fetus was born alive or dead.
Authors:Ralf Matthias Hagen, Rebecca Hinz, Egbert Tannich and Hagen Frickmann
We compared the performance of an in-house and a commercial malaria polymerase chain reaction (PCR) assay using freeze–thawed hemolytic blood samples.
A total of 116 freeze–thawed ethylenediamine tetraacetic acid (EDTA) blood samples of patients with suspicion of malaria were analyzed by an in-house as well as by a commercially available real-time PCR.
Concordant malaria negative PCR results were reported for 39 samples and malaria-positive PCR results for 67 samples. The inhouse assay further detected one case of Plasmodium falciparum infection, which was negative in the commercial assay as well as five cases of P. falciparum malaria and three cases of Plasmodium vivax malaria, which showed sample inhibition in the commercial assay. The commercial malaria assay was positive in spite of a negative in-house PCR result in one case. In all concordant results, cycle threshold values of P. falciparum-positive samples were lower in the commercial PCR than in the in-house assay.
Although Ct values of the commercial PCR kit suggest higher sensitivity in case of concordant results, it is prone to inhibition if it is applied to hemolytic freeze–thawed blood samples. The number of misidentifications was, however, identical for both real-time PCR assays.
Authors:Baukje G. Andela, Frank J. C. M. Van Eerdenburg, Ali Choukeir, Dávid Buják, Zoltán Szelényi, Szabolcs Boldizsár, Fruzsina Luca Kézér, László Molnár, Levente Kovács and Ottó Szenci
Activities of alkaline phosphatase, aspartate aminotransferase and alanine aminotransferase, and concentrations of serum metabolites [beta-hydroxybutyrate (BHB) and non-esterified fatty acids (NEFA)] of primiparous (n = 83) and multiparous (n = 213) Holstein cows were studied as possible predictors of retained fetal membranes (RFM), grade 2 clinical metritis (CM) and clinical endometritis (CEM). A logistic regression model was used to calculate odds ratios (OR) for the prevalence of CM diagnosed between 0–5, 6–10 and 11–20 days in milk (DIM) and for the prevalence of CEM diagnosed between 22–28 and 42–49 DIM. The activities of the examined serum enzymes did not show significant associations either with CM or with CEM. For NEFA sampled on days 0 and 5, an OR of 2.38 for CM 0–20 DIM and an OR of 2.58 for CM 11–20 DIM was found. For BHB sampled on days 0 and 5, an OR of 8.20 for CEM 22–28 and 42–49 DIM and an OR of 1.98 for CM 6–10 DIM were found. The prevalence of RFM was higher in ≥ 4 parity cows compared to primiparous cows (46.3% vs. 26.5%). BHB and NEFA levels measured between 0 and 5 DIM could have a predictive ability for postpartum uterine disorders such as RFM, CM and CEM.