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3591.
A NEW TOOL TO EVALUATE CORTISOL CONCENTRATIONS IN ANIMAL HAIR
Antonella Comin, Tanja Peric, Mara Colzani, Francesco De Vecchi, Cristina Bergamin, Alberto Prandi, 2018, published scientific conference contribution abstract

Abstract: The study of cortisol in hair requires the use of a highly sensitive assay. To date, hair cortisol concentrations (HCC) have been evaluated with different analytical methods as Radio Immune Assay (RIA), Enzyme Immunossay (EIA), Enzyme Linked Immunosorbent Assay (ELISA), ChemiLuminescent Immunoassay (CLIA) and High Performance Liquid Chromatography with Mass Spectrometry (HPLC/MS) or Liquid Chromatography with Tandem Mass Spectrometry (LC-MS/MS). Amplified luminescent proximity homogeneous assay (AlphaLISA) is an ELISA-like, nonradioactive technology first reported in 1994 [1]. This technology allows the quantitative detection of molecules of interest in a light-induced chemiluminescence immunoassay using a microplate without wash step. The aim of the study was to compare RIA with AlphaLISA method and examine the sensitivity in evaluating cortisol concentrations in animal hair of the Cortisol AlphaLISA kit (PerkinElmer, USA), originally suggested for the analysis of buffer and serum samples. The study has been carried out on 4 samples of calf, 4 samples of foal and 8 samples of sheep hair. After washing with isopropanol, two extracts were obtained from each hair sample. One extract has been evaluated for HCC by RIA as previously described [2,3]. The second extract has been reconstituted with the buffer provided by the Cortisol AlphaLISA Kit and HCC evaluated by the use of this commercially available kit. The preliminary results indicate that the Cortisol AlphaLISA Kit is capable to detect cortisol also in hair samples with high sensitivity, with a detection limit of 17 pg/ml. Intra- and inter-assay coefficients of variation (CVs) were 4.0% and 9.0%, respectively. Cortisol concentrations ranged between 1.31 and 16.94 pg/mg, 6.30 and 57.65 pg/mg, and 2.16 and 45.08 in calf, foal and sheep hair, respectively. The HCC obtained by Cortisol AlphaLISA Kit and RIA showed a good correlation (r=0.79, p<0.01). Considering the possibility to use a low amount of extracted sample, its no-washing procedure and the performances showed, we can conclude that the Cortisol AlphaLISA Kit can be considered an excellent tool to evaluate cortisol concentrations also in hair derived from animal species.
Keywords: hair, cortisol, analyses, method, AlphaLISA, Amplified luminescent proximity homogeneous assay
Published in RUNG: 09.04.2019; Views: 3324; Downloads: 0
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3592.
17-ß-Estradiol and Testosterone concentrations in claws of puppies up to 60 days of age.
Jasmine Fusi, Tanja Peric, Cristina Bergamin, Maria Cristina Veronesi, 2018, published scientific conference contribution abstract

Abstract: The current 30% of canine perinatal mortality (Tonnessen et al., 2012) claims the need to deepen the knowledge about this phase, characterized by long-term hormonal and metabolic changes, that could benefit of long time-frame methods of investigation, reducing the quantity of samplings and thus respecting animal welfare (Veronesi et al., 2015). Indeed, apart from the well-known invasiveness of blood samplings, the necessary repeated collection of feces, urine and saliva, providing punctual information, could be stressful for the newborns and their mothers with negative effects on health status and maternal behavior. Given that sexual steroid hormones were reported to have an influence on health outcomes and development already from the perinatal period (Frey et al., 2017), in this work 17-β-Estradiol (E2) and Testosterone (T) concentrations were assessed from the claws of dogs up to 60 days of age, to identify possible endogenous biomarkers. Ten male and 10 female puppies, viable and healthy, born by elective cesarean section, were enrolled. Samplings were performed by trimming claws at birth, and the regrowth at 30 and 60 days of age after the breeder or the owner signed an informed consent. Then, E2 and T concentrations were analyzed by RIA (Veronesi et al., 2015) and a possible effect of gender evaluated by ANOVA. All the hormonal claws concentrations showed a significant (p<0.001) drop from birth to 30 and 60 days of age, while no significant changes were observed between 30 and at 60 days of age (Table 1). No influence of the newborns’ gender was found. Because of the higher levels of E2 and T observed at birth and at 30 days of age, it could be supposed that a source of production could be the placental and maternal compartments. However, the direct involvement of the fetus itself could not be excluded, given the reported accumulation from the nail capillary bed of those hormones (de Berker et al., 2007) and the production of sexual steroid hormones by feline fetal gonads (Braun and Jewgenow, 2017).
Keywords: Dog, Puppy, Claws, 17-ß-Estradiol, Testosterone.
Published in RUNG: 09.04.2019; Views: 3132; Downloads: 0
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3593.
Hair dehydroepiandrosterone in newborn beef calves from birth up to 10 months of age
Monica Probo, Tanja Peric, Massimo Faustini, Alberto Prandi, Antonella Comin, 2018, published scientific conference contribution abstract

Abstract: Although steroidogenesis in maternal, placental and fetal compartments is interdependent, the maternal and fetal hypothalamic-pituitary-adrenal (HPA) axes represent separate biological systems, with dehydroepiandrosterone (DHEA) recognized as the main fetal steroid. Fetal steroids are likely to influence development and have long-term effects on HPA function. Hair analysis represents a promising methodological approach for the non-invasive measurement of steroids, allowing for a retrospective analysis of the total exposure to steroids over time, and avoiding the influence of acute events or circadian fluctuations (Schury et al. 2017, BMC Psychiatry 17:213). Hair coat DHEA (hcD) concentrations have been investigated in cows (Peric et al. 2017, Livestock Sci 202:39–43), but no studies have been performed on newborn calves. Hair samples of 12 beef calves (7 males, 5 females) were collected by shaving at calving (T0) and monthly up to 10 months of age (T1-T10), only on the re-growth area. Hair DHEA was analyzed by RIA2. Statistical analysis revealed that hcD concentrations in calves were influenced by age, with higher levels at T1 and T2 compared to the other samples (p < 0.05). HcD levels were not influenced by newborn gender, birth weight and Apgar score. These data demonstrate that DHEA is quantifiable in the hair coat of newborn calves, and that hcD levels are influenced by the age of calves. The higher accumulation of DHEA was detected from birth to 2 months of age, suggesting that DHEA continues to be secreted by the newborn calf also beyond birth and could be involved in the events occurring during the first months of age.
Keywords: hair, dehydroepiandrosterone, cattle, calf
Published in RUNG: 09.04.2019; Views: 3095; Downloads: 0
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3594.
Maternal and fetal hair cortisol concentrations in beef cattle at delivery
Tanja Peric, Monica Probo, Antonella Comin, Maria Cristina Veronesi, Marta Montillo, Alberto Prandi, 2018, published scientific conference contribution abstract

Abstract: Hypothalamus-pituitary-adrenal (HPA) axis of both mother and fetus, is one of key mechanisms involved in fetal programming. Cortisol, the end-product of this axis, plays a critical role in regulating fetal and new-born metabolism and development. The aim of the study was to evaluate maternal and fetal cortisol concentrations shortly after delivery on hair samples non-invasively collected. The study was carried out on 11 pairs of beef cows and their calves (calves were 12 because of one case of twins) from the same farm and subjected to the same managerial conditions. Hair from new-born calves and from their mothers was collected on the day of birth shaving their withers to the level of the skin. The hair cortisol concentrations (HCC) were determined by RIA as previously described (Peric et al. 2013: J Dairy Sci 96:3023–3027). The results showed that fetal and maternal HCC ranged from 16.11 to 40.43 pg/mg and from 1.88 to 15.73 pg/mg respectively, with fetal and maternal mean ± SE HCC of 23.72 ± 2.21 and 6.40 ± 1.32 pg/mg respectively (p < 0.001). Fetal HCC were on average 3.5 higher than those of mothers but this ratio differed among the pairs. These differences were also found among the twin calves. These results indicate that in beef cows-and-calves pairs, although HCC at delivery were always higher in calves than in cows, the ratio between fetal and maternal HCC differs among pairs, suggesting an individuality in the fetal programming processes that may also rely on genetic and epigenetic factors.
Keywords: hair, cortisol, cattle, delivery
Published in RUNG: 09.04.2019; Views: 3383; Downloads: 0
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3595.
EuroSLAB - The rheology of the subducting slab and mantle : Final report EuroSLAB Trieste IP
Sandro Scandolo, Luigi Giacomazzi, 2011, final research report

Abstract: The aim of this Individual Project was to study the microscopic phenomena of deformation in mantle minerals by means of atomistic modeling. Understanding such mechanisms and determining their relative importance in different minerals and in the wide range of pressure and temperature found in the mantle, is a prerequisite for any interpretation of deformation experiments, of texture modeling, and of their geophysical implications. The project was approved for funding in mid 2006, and was carried out in large part in collaboration with a postdoctoral fellow funded by CNR (Luigi Giacomazzi), whose fellowship ended on December 15, 2009.
Keywords: gypsum, coesite, silica, dislocations, rheology
Published in RUNG: 08.04.2019; Views: 2837; Downloads: 0
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3596.
Extension of elliptic curves on Krasner hyperfields
Vahid Vahedi, Morteza Jafarpour, Hossien Aghabozorgi, Irina Elena Cristea, 2019, original scientific article

Keywords: Hypergroup, hyperring, hyperfield, elliptic (hyper)curve, generalized Weierstrass equation, cryptography
Published in RUNG: 08.04.2019; Views: 2969; Downloads: 0
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3597.
Investigating silica from first-principles
Luigi Giacomazzi, other performed works

Abstract: Silica (SiO2 ) is a prototypical binary compound showing a complex phase diagram. It is the most abundant mineral in the Earth’s crust, and it has many important technological applications. From a theoretical point of view, SiO2 is a benchmark requiring both accurate atomistic models and a multi-scale approach. As an example of the capabilities of state- of-the-art theoretical modeling, we discuss the vibrational spectra of vitreous SiO2 with particular attention to the information that these spectra can provide on the medium-range structure of the oxide network. Then, as an example of multi-scale approach we present our work on dislocations in coesite within the framework of the Peierls-Nabarro model.
Keywords: silica, coesite, dislocations, Peierls-Nabarro
Published in RUNG: 08.04.2019; Views: 2857; Downloads: 0
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3598.
Elided Clausal Conjunction Is Not the Only Source of Closest‐Conjunct Agreement: A Picture‐Matching Study
Boban Arsenijević, Jana Willer-Gold, Nadira Aljović, Nermina Čordalija, Marijana Kresić, Nedžad Leko, Frane Malenica, Franc Marušič, Tanja Milićev, Nataša Milićević, Petra Mišmaš, Ivana Mitić, Anita Peti-Stantić, Branimir Stanković, Jelena Tušek, Andrew Nevins, 2019, original scientific article

Abstract: A recurring hypothesis about the agreement phenomena generalized as closest‐conjunct agreement takes this pattern to result from reduced clausal conjunction, simply displaying the agreement of the verb with the nonconjoined subject of the clause whose content survives ellipsis (Aoun, Benmamoun & Sportiche 1994, 1999; see also Wilder 1997). Closest‐conjunct agreement is the dominant agreement pattern in the South Slavic languages Slovenian and Bosnian/Croatian/Serbian. A natural question is whether closest‐conjunct agreement in these varieties may indeed be analyzed as entirely derived from conjunction reduction. In this article, we report on two experiments conducted to test this. The results reject the hypothesis as far as these languages are concerned, thereby upholding the relevance of models developed to account for closest‐conjunct agreement within theories of agreement.
Keywords: Conjunct agreement, Clausal conjunction, Experimental syntax
Published in RUNG: 08.04.2019; Views: 11936; Downloads: 136
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3599.
Photothermal lens technique: a comparison between conventional and self-mixing schemes
Humberto Cabrera, Imrana Ashraf, Fatima Matroodi, Evelio E. Ramírez-Miquet, Jehan Akbar, Jose Juan Suárez-Vargas, John Fredy Barrera Ramírez, Dorota Korte, Hanna Budasheva, Joseph J. Niemela, 2019, original scientific article

Abstract: This work focuses on assessing the analytical capabilities of a new photothermal lens method based on the self-mixing effect to reliably measure metallic traces in water-ethanol solutions. We compare it with the conventional thermal lens scheme, considering the low detection limit and versatility. A theoretical model is presented to describe the laser power variations as a function of the photothermal parameters of the analyzed sample. The experimental results demonstrate that the laser intensity variations, induced by the external optical feedback, are governed by the photothermal lens effect. Measurements of Fe(II)-1,10-phenanthroline in water–ethanol solutions show a favourable correspondence and agreement with the theory. The low detection limits obtained by the two analytic techniques also agree very well. Nevertheless, our instrument presents advantages regarding compactness and simplicity, suggesting that this platform could be potentially useful as a robust analytical tool for metallic trace detection. In addition, calibration of the method is performed by measuring the so-called self-mixing constant.
Keywords: thermal lens, photothermal spectroscopy, self-mixing effect, trace detection
Published in RUNG: 05.04.2019; Views: 3292; Downloads: 0
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3600.
Spremljevalka zvezd : Šumovci smo se tokrat pogovorili z mlado znanstvenico Tanjo Petrushevsko
Helena Lupinc, 2019, interview

Keywords: intervju
Published in RUNG: 04.04.2019; Views: 3959; Downloads: 0
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