bluuebunny/crossref_metadata_2025_split huggingface dataset:
Serum level of some micronutrients in children infected with Helicobacter pylori
Authors: Elsaghier Ashraf Mohamed , Abdel Aal Fardous Hanem , Abu Faddan Nagla Hassan , Farghaly Hekma Saad , Hassan Mona Abd-Elhamid , Sherif Mahmoud Farouk 
Published: February 2020

Abstract
Background
Helicobacter pylori (H. pylori) proved to be highly prevalent all over the world. H. pylori may modify the absorption of many nutrients. Studies have suggested that, beyond iron, H. pylori infection may affect the homeostasis of other micronutrients such as vitamins and trace elements. Our study’s aim was to assess the effect of H. pylori infection on some blood micronutrient level including zinc, selenium, vitamin C, and vitamin B12 in children with chronic or recurrent unexplained dyspeptic symptoms and/or non-variceal hematemesis.

Results
A cross-sectional case-control study was carried out in 32 children (4–18 years) with chronic or recurrent unexplained dyspeptic symptoms and/or non-variceal hematemesis. Patients were divided according to the results histopathology and rapid urease test into two groups, H. pylori-positive patients (18 patients) and H. pylori-negative patients (14 patients). Another control group of 18 children was included. Serum levels of zinc, selenium, vitamin C, and vitamin B12 were measured in all children. Prevalence of H. pylori infection was 56.2%. The mean serum zinc levels were significantly lower in H. pylori-positive cases than in control group (84.2 ± 13.85 versus 94.6 ± 6.52 with P = 0.009) and lower than in H. pylori-negative cases but not statistically significant (84.2 ± 13.85 versus 92.2 ± 8.53 with P = 0.054). The mean serum vitamin C levels were significantly lower in H. pylori-positive cases than in negative cases and control group (220.7 ± 46.16 versus 305.1 ± 28.83 and 313.1 ± 31.43 with P < 0.0001). The mean serum vitamin B12 levels were significantly lower in H. pylori-positive cases than in negative cases and control group (167.8 ± 76.98 versus 290.1 ± 69.92 and 326.1 ± 38.67 with P < 0.0001). The mean serum selenium level was slightly higher in H. pylori-positive patients than in H. pylori-negative patients and control group but not statistically significant (118.2 ± 11.13 versus 112.1 ± 8.69 and 113.1 ± 13.76 with P = 0.096, 0.243 respectively).

Conclusion
Helicobacter pylori infection in children has a significant negative effect on the serum levels of zinc, vitamin C, and vitamin B12.
Mesenchymal-epithelial transition regulates initiation of pluripotency exit before gastrulation
Authors: Hamidi Sofiane , Nakaya Yukiko , Nagai Hiroki , Alev Cantas , Kasukawa Takeya , Chhabra Sapna , Lee Ruda , Niwa Hitoshi , Warmflash Aryeh , Shibata Tatsuo , Sheng Guojun 
Published: February 2020

ABSTRACT
The pluripotent epiblast gives rise to all tissues and organs in the adult body. Its differentiation starts at gastrulation, when the epiblast generates mesoderm and endoderm germ layers through epithelial-mesenchymal transition (EMT). Although gastrulation EMT coincides with loss of epiblast pluripotency, pluripotent cells in development and in vitro can adopt either mesenchymal or epithelial morphology. The relationship between epiblast cellular morphology and its pluripotency is not well understood. Here, using chicken epiblast and mammalian pluripotency stem cell (PSC) models, we show that PSCs undergo a mesenchymal-epithelial transition (MET) prior to EMT-associated pluripotency loss. Epiblast MET and its subsequent EMT are two distinct processes. The former, a partial MET, is associated with reversible initiation of pluripotency exit, whereas the latter, a full EMT, is associated with complete and irreversible pluripotency loss. We provide evidence that integrin-mediated cell-matrix interaction is a key player in pluripotency exit regulation. We propose that epiblast partial MET is an evolutionarily conserved process among all amniotic vertebrates and that epiblast pluripotency is restricted to an intermediate cellular state residing between the fully mesenchymal and fully epithelial states.
Branching Ratio Measurement in 23Ne Beta Decay
Authors: Rahangdale H. , Mishnayot Y. , Ohayon B. , Hirsh T. , Vaintraub S. , Glick-Magid A. , Gazit D. , Ron G. 
Published: February 2020

We describe the branching ratio measurement experiment performed at Soreq Applied Research Accelerator Facility (SARAF) using the deuteron beam. We successfully produced 107/s 23Ne atoms in the run and used them to measure the branching ratio in 23Ne beta decay to the first excited state of 23Na. We provide some preliminary results of the experiment whose data analysis currently ongoing.
Investigation of the C3+ Auger KLL spectrum obtained in collisions of 6-15 MeV C4+ (1s2, 1s2s 3S) with gas targets
Authors: Madesis I. , Laoutaris A. , Benis E. P. , Zouros T. J. M. 
Published: February 2020

Single electron transfer to the 1s2s 3S long-lived component of the naturally occurring mixed-state(1s2, 1s2s 3S) C4+ion beam in collisions with gas targets was investigated using zero-degree Auger projectile spectroscopy at the Demokritos 5.5 MV tandem accelerator. The observed KLL Auger spectrum contains 1s2s2p 2P and 4P states resulting from direct 2p transfer to the 1s2s 3S. Higher lying (1s2s 3S)nl2,4L states produced by nl transfer (n>2) were also observed and can in principle feed the lower lying 1s2s2p2Pand 4Pstates. However, due to spin selection rules only the quartets have large enough radiative branching ratios resulting in a proposed selective feeding of only the 1s2s2p 4P state by E1 cascades, while minimally affecting the 1s2s2p 2P states. In the absence of cascades, the ratio of cross sections for 2p transfer to the 1s2s 3S state, Rm≡ σm(4P)/σm(2P), is 2 according to spin statistics. However, the 1s2ground state beam component also contributes to the production of the 1s2s2p 2P doublet states by transfer-excitation. To isolate just the 1s2s 3S transfer contribution and compute Rm, a new technique was employed requiring the recording of two KLL spectra, with the same collision energy, but each with appreciably different 1s2s 3S content, varied by stripping techniques. Our determination of Rmshows this to be >2, in agreement with spin statistics, but contrary to the expected 4P enhancement due to cascade feeding. Details of the analysis and results are discussed.
Gamma spectroscopy studies of the underwater hydrothermal vent field of the Methana Peninsula
Authors: Papakosta V. , Mertzimekis T. J. , Triantafyllou M. 
Published: February 2020

A preliminary study of natural radioactivity was conducted on the thermal spas in Methana Peninsula. To carry out this research, a collection of 17 water samples were taken from thermal springs around and underwater of the volcanogenic Peninsula at depths ranging 0–5 m. The Methana peninsula belongs to the Hellenic Volcanic Arc and is characterized by hydrothermal vent activity. A NaI(Tl) scintillator (AMESOS) was used to carry out gamma–ray counting of the samples to deduce the activity concentrations of the natural radionuclides of the 238U and 232Th decay series, as well as 40K in spa waters. Results are expected to provide information on the geological setting of the Methana peninsula. The impact of naturally occurring radioisotopes to human health has also been assessed in terms of the radiation dose risk corresponding to the measured activities.
On the Experimental Investigation of the Angular Distributions in the Reaction 112Cd(p,γ)113In
Authors: Zyriliou A. , Khaliel A. , Mertzimekis T. J. 
Published: February 2020

Some of the mid–weight nuclei lie in the region of the isotopic chart where the astrophysical p-process has a prominent role in the nucleosynthetic scenarios. Experimentally deduced reaction cross section data can provide stringent tests for the astrophysical models, especially at low energies. In this framework, the reaction 112Cd(p,γ)113In has been studied experimentally at four proton beam energies 2.8 ≤ Ep≤ 3.4 MeV, partly inside the astrophysically interesting Gamow window. Proton beams were provided by the 5.5 MV T11 Van de Graaff Tandem Accelerator of the Institute of Nuclear Physics of the National Center for Scientific Research (NCSR) “Demokritos”. In–beam spectroscopy was carried out with an array of four HPGe detectors sitting on a rotating table. In total, eight (8) different angles were used to record gamma–ray spectra. Special focus was given on constructing the angular distribution of each gamma–ray feeding the ground state of 113In directly, so as to determine the reaction cross sections from the in–beam data, exclusively. The resulting cross sections were compared to Hauser–Feshbach calculations using the code TALYS v1.9.
Evaluation of neutron fluence in the treatment room and along the maze of an 18 MV linear accelerator
Authors: Siltzovalis G. , Papadopoulos K. , Savva M. I. , Vasilopoulou T. , Georgolopoulou P. , Karaiskos P. , Kalef-Ezra J. , Stamatelatos I. E. 
Published: February 2020

Neutron fluence and dose equivalent rate in the treatment room and along the maze of an 18 MV medical linear accelerator was evaluated using Monte Carlo code MCNP5. Scope of the study was to test the hypothesis that a simple accelerator head model can adequately estimate the neutron fluence in the treatment room and along the maze without the requirement of a detailed modeling of the complex accelerator head configuration. The accelerator head was modeled either as a spherical cell source of 10 cm in radius or as a point source in the centre of a spherical cell of 10 cm internal and 20 cm external radious, both made of tungsten. The calculations were compared against measurements performed using gold and indium activation foils. A good agreement between calculated and experimental results was observed in the treatment room. However, the calculations at the maze entrance overestimated the neutron fluence by a factor of 3. The results of the study contribute towards the development of a simple and computationally cost effective methodology for the calculation of neutron dose in the treatment room and the maze of high energy medical accelerators providing a representative simulation of the complex accelerator, bunker and maze configurations that cannot be described by presently used analytical expressions.
Improved calibration for non destructive determination of manganese in metallurgical tap smelting slag using a high energy medical accelerator
Authors: Togia N. , Vasilopoulou T. , Filippaki E. , Savva M. I. , Georgolopoulou P. , Mertzimekis T. J. , Basiakos Y. , Stamatelatos I. E. 
Published: February 2020

An improved calibration method for the non-destructive determination of the manganese content in large metallurgical tap smelting slag samples using photon activation analysis is presented. A metallurgical tap smelting slag of archaeological interest from the Psaphaki site, Laconia, was irradiated under the mixed photon and parasitic neutron field produced by an 18 MV medical accelerator. The sample was 236 g in mass. Manganese was determined by the photon and neutron induced reactions 55Mn(g, n)54Mn and 55Mn(n,g)56Mn, measuring the 834.8 keV 54Mn and 846.8 keV 56Mn photopeaks, respectively. Gamma spectra from the large sample and calibration foils were acquired using a HPGe detector of 85% relative efficiency. The Efficiency Transfer method was applied to determine the Full Energy Peak Efficiency (FEPE) of the large sample. The results of the analysis showed that the manganese content in the slag was (39.5±15.8) % w/w and (39.7±2.6) % w/w measuring the 56Mn photopeak and the 54Mn photopeak, respectively. Therefore, a good agreement between the photon and neutron activation analysis techniques was observed. Advantages of the technique include improved representativeness of results, elimination of reference samples, irradiation versatility and convenience, as well as reduced contamination probability since a minimal sample preparation was required for the analysis. Moreover, the introduction of the relative calibration technique removes the dependency on parameters that are usually evaluated with larger uncertainties, such as detector efficiency, increasing the quality and reliability of the procedure.
Staphylococcus aureus nasal carriage and microbiome composition among medical students from Colombia: a cross-sectional study
Authors: Reyes Niradiz , Montes Oscar , Figueroa Stephanie , Tiwari Raj , Sollecito Christopher C. , Emmerich Rebecca , Usyk Mykhaylo , Geliebter Jan , Burk Robert D. 
Published: February 2020

Background: The anterior nares are the main ecological niche for Staphylococcus aureus, an important commensal and opportunistic pathogen. Medical students are frequently colonized by a variety of pathogens. Microbial interactions in the human nose can prevent or favor colonization by pathogens, and individuals colonized by pathogens have increased risk of infection and are the source of transmission to other community members or susceptible individuals. According to recent studies, the microbiome from several anatomic areas of healthy individuals varies across different ethnicities. Although previous studies analyzed the nasal microbiome in association with S. aureus carriage, those studies did not provide information regarding ethnicity of participants. Our aim was to assess S. aureus nasal carriage patterns and prevalence among medical students from Colombia, a country of Hispanic origin, and to investigate possible associations of colonization and nasal microbiome composition (bacterial and fungal) in a subgroup of students with known S. aureus carriage patterns. Methods: Nasal swabs from second-year medical students were used to determine prevalence and patterns of S. aureus nasal carriage. Based on microbiological results, we assigned participants into one of three patterns of S. aureus colonization: persistent, intermittent, and non-carrier. Then, we evaluated the composition of nasal microbial communities (bacterial and fungal) in 5 individuals from each carriage category using 16S rRNA and Internal-Transcribed-Spacer sequencing. Results: Prevalence of S. aureus nasal carriage among medical students was 28%. Carriage of methicillin-resistant strains was 8.4% and of methicillin-sensitive strains was 19.6%. We identified 19.6% persistent carriers, 17.5% intermittent carriers, and 62.9% non-carriers. Conclusions: Analysis of nasal microbiome found that bacterial and fungal diversity was higher in individuals colonized by S. aureus than in non-carriers; however, the difference among the three groups was non-significant. We confirmed that fungi were present within the healthy anterior nares at substantial biomass and richness.
Portret trumienny nieznanego Ormianina polskiego
Authors: Jasińska Anna 
Published: February 2020

Coffin Portrait of an Unidentified Polish Armenian Man
The comparison between the illustrative materials and the report from the 1932 Lwów (Lviv) exhibition of Polish Armenian art that was published in the Paris magazine Անահիտ made it possible to confirm that one of the several coffin portraits held in the collections of the Jagiellonian University Museum in Krakow is an 17th century portrait of an unidentified Armenian man. The portrait was most probably intended for the Archdiocesan Armenian Museum in Lwów (Lviv), but the outbreak of the Second World War interrupted the plans to establish this institution.
Inauguracja prac Ośrodka Badań nad Kulturą Ormiańską w Polsce przy Polskiej Akademii Umiejętności w Krakowie
Authors: Zięba Andrzej A. 
Published: February 2020

Inauguration of the Research Centre for Armenian Culture in Poland as a part of the Polish Academy of Arts and Sciences in Krakow
The inauguration of the Research Centre for Armenian Culture took place on January 21, 2019 at the Collegium Maius of the Jagiellonian University in Krakow.The Centre was founded on the basis of old and contemporary achievements of Kraków armenologists and armenists. They were accompanied by the constant interest of Polish Armenians – from Kraków, Warsaw, Gdańsk, Lower and Upper Silesia. Such support was invaluable in the efforts to create the Centre, because it demonstrated not only the scientific but also the social need for research in this field. In this atmosphere, in recent years, important initiatives for Polish armenology were born – the magazine Lehahayer, devoted to the history of Polish Armenians, financially supported by the Lanckoroński Foundation, the Jagiellonian University and the Gumiński Foundation (this year, the 6th edition will be released), and a series of archival sources, Historical Monuments of Polish Armenians, implemented under the care of the Foundation for Culture and Heritage of Polish Armenians thanks to a grant from the National Humanities Development Program. In organizational terms, however, these activities were semi-private or, so to speak, partisan. They were institutionalized when the Centre was founded.
Geopolítica de Brasil e Argentina: Percepções sobre a América do Sul e as Relações Bilaterais
Authors: Grassi Jéssica Maria 
Published: February 2020

O artigo tem como objetivo, por um lado, analisar as concepções da geopolítica brasileira e as mudanças nos papéis atribuídos à América do Sul e à Argentina e, por outro lado, explorar a geopolítica argentina, de modo a identificar as mudanças nas perspectivas relativas à América do Sul e ao Brasil. Esse estudo é motivado pela identificação histórica e mútua de Brasil e Argentina como rivais e a transformação ocorrida após 1980, quando os dois países consolidaram uma importante parceria estratégica, a qual foi fundamental para o aprofundamento da integração sul-americana. Desse modo, a técnica de pesquisa utilizada é a bibliográfica, sendo este um estudo exploratório e qualitativo que não pretende fazer uma comparação entre os pensamentos geopolíticos dos dois países ao longo do período analisado, mas abordar aspectos relevantes para se compreender as mudanças na identificação mútua dos vizinhos sul-americanos e em sua geopolítica.Palavras-chave: Rivalidade, parceria estratégica, Bacia do Prata.ABSTRACTThe article aims, on one hand, to analyze the conceptions of Brazilian geopolitics and the changes in the roles attributed to South America and Argentina; and, on the other hand, to explore the Argentine geopolitics, in order to identify the changes in the perspectives regarding South America and Brazil. This research is motivated by the historical and mutual identification between Brazil and Argentina as rivals and the transformation that occurred after 1980, when both countries consolidated an important strategic partnership, which was fundamental for the deepening of South American integration. Therefore, it is used the bibliographic research technique. Also, this is an exploratory and qualitative study that does not intend to make a comparison between the geopolitical thoughts of the two countries over the analyzed period; but deal with relevant aspects to understand the changes in the mutual identification of the two South American neighbors and in their geopolitics.Keywords: Rivalry, strategic partnership, Prata’s River Basin. Recebido em: 16 jan. 2020 | Aceito em: 23 jan. 2020.
A constitucionalidade da desapropriação judicial
Authors: Fagundes André 
Published: February 2020

O presente artigo ocupa-se fundamentalmente do exame da constitucionalidade do instituto da desapropriação judicial (previsto no art. 1.228, §§ 4º e 5º, do Código Civil). Para tanto, analisa algumas questões que envolveram a sua concepção e a identificação de sua natureza jurídica. Igualmente, faz análises doutrinárias e jurisprudenciais acerca da funcionalização e do regime jurídico-constitucional da propriedade. Ao final, demonstra-se a conformidade desse instrumento sustentável de regularização de núcleos urbanos informais consolidados com a ordem constitucional.
Incorporating Secondary Information Using Direct Sequential
Cosimulation
Authors: Soares A. , Almeida J. A. , Guerreiro L. 
Published: February 2020

Abstract
Direct sequential simulation is a new approach to stochastic simulation that does not require any prior transformation of the original variable or any posterior transformation of simulated values. To simulate continuous variables, the algorithm uses the estimated local mean and variance to sample from a global cumulative distribution function. An advantage of this approach over sequential Gaussian simulation or sequential indicator simulation is that it accommodates the joint simulation of several variables under the direct simulation principle; that is, coregionalization modeling is performed with the original variables. The direct joint simulation methodology is presented in this chapter, and a representative set of examples is provided to illustrate the potential of the method to incorporate secondary information in the characterization of oil reservoirs.
Geostatistical Modeling of the Spaces of Local, Spatial, and
Response Uncertainty for Continuous Petrophysical Properties
Authors: Goovaerts P. 
Published: February 2020

Abstract
In the characterization of petroleum reservoirs, three types of uncertainty typically arise: (1) the uncertainty about the value of a petrophysical attribute at an unsampled location (local uncertainty); (2) the joint uncertainty about attribute values at several locations taken together (spatial uncertainty); and (3) the uncertainty about production forecasts, such as time to recover a given proportion of the oil (response uncertainty). In each case, the probabilistic way to assess the uncertainty consists of determining the distribution or set of possible outcomes (e.g., local permeability value, permeability grid, or production parameters), which is referred to as the space of uncertainty.
This chapter reviews the major geostatistical algorithms available to model both local and spatial uncertainties of continuous attributes. Goodness criteria are introduced for each type of space of uncertainty, and the impacts of the following parameters are discussed: stochastic-simulation algorithm, number of realizations, and ergodic fluctuations. Conclusions are drawn on the relations between the different spaces of uncertainty. The discussion is illustrated using an exhaustive set of 102 × 102 permeability values.
Feature-based Probabilistic Interpretation of Geobodies from
Seismic Amplitudes
Authors: Caers J. , Arpat B. G. , Garcia C. A. 
Published: February 2020

Abstract
Manual interpretation of large volumes of seismic data is a tedious and timeconsuming process. Seismic interpretation relies on extensive expert knowledge of geological rules, as well as strong geophysical interpretation skills. Moreover, in modern approaches to reservoir characterization, a single, deterministic reservoir model interpreted from seismic information is commonly of less interest than the multiple potential interpretations that can arise from the data.Hence, an understanding of the uncertainty associated with seismic interpretation and its quantification are extremely important to reservoir management and decision analysis. In this chapter, several new tools are presented, most of them based on statistical pattern recognition, that can aid the interpreter in constructing a seismic-based reservoir model and provide some uncertainty quantification. Two groups of methods based on unsupervised and supervised pattern detection are discussed. A new geostatistical approach termed feature-based geostatistics is introduced, the aim of which is to accurately reproduce facies shapes. All methods are validated using an interpreted seismic data set representing channel facies from a turbidite sequence in Gabon, west Africa.