bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of thermal annealing on structure and oxidation of iron nanowires
Authors: Krajewski Marcin , Brzózka Katarzyna , Górka Bogumił , Lin Wei-Syuan , Lin Hong-Ming , Szumiata Tadeusz , Gawroński Michał , Wasik Dariusz 
Published: May 2015

Abstract
Raman spectroscopy as well as Mössbauer spectroscopy were applied in order to study the phase composition of iron nanowires and its changes, caused by annealing in a neutral atmosphere at several temperatures ranging from 200°C to 800°C. As-prepared nanowires were manufactured via a simple chemical reduction in an external magnetic field. Both experimental techniques proved formation of the surface layer covered by crystalline iron oxides, with phase composition dependent on the annealing temperature (T
a). At higher T
a, hematite was the dominant phase in the nanowires.
Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti) alloys
Authors: Hasiak Mariusz 
Published: May 2015

Abstract
The microstructure and magnetic properties of nanocomposite hard magnetic Nd-Fe-B-(Re, Ti) materials with different Nd and Fe contents are studied. The role of Re and Ti addition in phase composition and volume fraction of the Nd-Fe-B phase is determined. All samples are annealed at the same temperature of 993 K for 10 min. Mössbauer spectroscopy shows that the addition of 4 at.% of Re to the Nd8Fe78B14 alloy leads to creation of an ineligible amount of the magnetically hard Nd2Fe14B phase. Moreover, the microstructure and magnetic characteristics recorded in a wide range of temperatures for the Nd8Fe79−

x
B13M
x
(x = 4; M = Re or Ti) alloys are also analyzed.
Structure and Mössbauer spectroscopy studies of mechanically activated (BiFeO3)1−x-(BaTiO3)x solid solutions
Authors: Malesa Bożena , Antolak-Dudka Anna , Oleszak Dariusz , Pikula Tomasz 
Published: May 2015

Abstract
(BiFeO3)1-x
-(BaTiO3)
x
solid solutions with x = 0.1–0.4 and 0.7 were investigated. The ceramics were prepared by mechanical activation technology and subsequent heat treatment. As was proved by X-ray diffraction, increase of BaTiO3 concentration causes a change in the crystalline structure from the rhombohedral structure characteristic of BiFeO3 to a cubic one. 57Fe Mössbauer spectroscopy allowed observation of a gradual transformation from an ordered spin structure of Fe3+ ions to the paramagnetic state with an increase of x.
Potencial management of waste phosphogypsum with particular focus on recovery of rare earth metals
Authors: Podbiera-Matysik Kinga , Gorazda Katarzyna , Wzorek Zbigniew 
Published: May 2015

Abstract
Phosphogypsum is a noxious industrial waste contributing to global environmental and economic problems. This publication focuses above all on phosphogypsum resulting from the processing of apatite as a phosphorus bearing compound, since it contains considerable amounts of lanthanides due to its magma origin. The possibilities of its waste-free processing are large, however they require the application of suitable technologies, frequently expensive ones, and allowing for the individual characteristics of the given waste. The research works conducted so far confirm the possibility of applying phosphogypsum for the recovery of lanthanides, and the process enhances the removal of remaining impurities, thanks to which the purified calcium sulphate (gypsum) may find application for the production of construction materials.
One-dimensional isothermal multicomponent diffusion-reaction model and its application to methanol synthesis over commercial Cu-based catalyst
Authors: Lei Kun , Ma Hongfang , Zhang Haitao , Ying Weiyong , Fang Dingye 
Published: May 2015

Abstract
The present work was a study on global reaction rate of methanol synthesis. We measured experimentally the global reaction rate in the internal recycle gradientless reactor over catalyst SC309. The diffusion-reaction model of methanol synthesis was suggested. For model we chose the hydrogenation of CO and CO2 as key reaction. CO and CO2 were key components in our model. The internal diffusion effectiveness factors of CO and CO2 in the catalyst were calculated by the numerical integration. A comparison with the experiment showed that all the absolute values of the relative error were less than 10%. The simulation results showed that decreasing reaction temperature and catalyst diameter were conducive to reduce the influence of the internal diffusion on the methanol synthesis.
Effect of magnetic field and silver nanoparticles on yield and water use efficiency of Carum copticum under water stress conditions
Authors: Seghatoleslami Mohammadjavad , Feizi Hassan , Mousavi Gholamreza , Berahmand Aliasghar 
Published: May 2015

Abstract
Normally the productivity of cropping systems in arid and semi- arid regions is very low. The sustainable agricultural systems try to find out environmental friendly technologies based on physical and biological treatments to increase crop production. In this study two irrigation treatments (control and water stress) and six methods of fertilizer treatment (control, NPK-F, using magnetic band- M, using silver nano particles- N, M+N and M+N+50% F) on performance of ajowan were compared. Results showed that treatments with magnetic field or base fertilizer had more yield compared to the control and silver nanoparticles (N) treatments. Application of silver nanoparticles had no positive effect on yield. The highest seed and biomass WUE achieved in base fertilizer or magnetic field treatments. Under water stress treatment, seed WUE significantly increased. In conclusion magnetic field exposure, probably by encourage nutrient uptake efficiency could be applied to reduce fertilizer requirement. On the other hand the cultivation of plants under low MF could be an alternative way of WUE improving.
Flame resistant cellulosic substrate using banana pseudostem sap
Authors: Basak S. , Samanta Kartick. K. , Saxena S. , Chattopadhyay S.K. , Narkar R. , Mahangade R. , Hadge G.B. 
Published: May 2015

Abstract
Flame retardancy was imparted in cellulosic cotton textile using banana pseudostem sap (BPS), an eco-friendly natural product. The extracted sap was made alkaline and applied in pre-mordanted bleached and mercerized cotton fabrics. Flame retardant properties of both the control and the treated fabrics were analysed in terms of limiting oxygen index (LOI), horizontal and vertical flammability. Fabrics treated with the non-diluted BPS were found to have good flame retardant property with LOI of 30 compared to the control fabric with LOI of 18, i.e., an increase of 1.6 times. In the vertical flammability test, the BPS treated fabric showed flame for a few seconds and then, got extinguished. In the horizontal flammability test, the treated fabric showed no flame, but was burning only with an afterglow with a propagation rate of 7.5 mm/min, which was almost 10 times lower than that noted with the control fabric. The thermal degradation and the pyrolysis of the fabric samples were studied using a thermogravimetric analysis (TGA), and the chemical composition by FTIR, SEM and EDX, besides the pure BPS being characterized by EDX and mass spectroscopy. The fabric after the treatment was found to produce stable natural khaki colour, and there was no significant degradation in mechanical strengths. Based on the results, the mechanism of imparting flame retardancy to cellulosic textile and the formation of natural colour on it using the proposed BPS treatment have been postulated.
Properties and activity of the cobalt catalysts for NH3 synthesis obtained by co-precipitation – the effect of lanthanum addition
Authors: Zybert Magdalena , Karasińska Magdalena , Truszkiewicz Elżbieta , Mierzwa Bogusław , Raróg-Pilecka Wioletta 
Published: May 2015

Abstract
In modern research on catalysts for NH3 synthesis a lot of attention is paid to cobalt. In this work the new catalytic systems based on cobalt are presented. Unsupported cobalt catalysts singly promoted (La or Ba) and doubly promoted (La and Ba) were prepared and tested in NH3 synthesis reaction under commercial synthesis conditions. Characterization studies revealed that lanthanum plays a role of a structural promoter, which improves the surface of catalyst precursors and prevents from sintering during calcination. However, lanthanum has a negative effect on the reduction of cobalt oxide, but the addition of barium promoter (Co/La/Ba catalyst) diminishes the negative impact of La. The co-promotion of cobalt with lanthanum and barium results in the increasing of the active phase surface and improvement of its activity in NH3 synthesis.
Brand Products of Regional Cuisine in the Promotion of Tourism in Roztocze
Authors: Bekier-Jaworska Ewa , Bochenek Marcin 
Published: May 2015

Abstract

Introduction
. There has been a trend over the last few years of using specialties of regional cuisine as an independent tourist attraction. The creation of local brands is an important element in the promotion of a given region and it also influences the development of culinary tourism. The aim of the studies conducted was to identify regional dishes - a choice of dishes that could be described as 'brand dishes' and the use of those dishes as tourist attractions in Roztocze.
Material and methods
. Studies were conducted on a group of students studying tourism and recreation at State Higher School of Vocational Education (PWSZ) in Zamość using a questionnaire.
Results
. The questionnaire provided an assessment of the levels of knowledge of regional cuisine among Polish and Ukrainian students, identified the most characteristic dishes and selected brand products, and helped to arrive at a suitable method of promotion.
Conclusions
. Nationality, family customs and selection of local restaurants highly influence knowledge of regional cuisine. Interviewees decided that the most outstanding products from Roztocze were Zwierzyniec beer, and Biłgoraj pie. Regional products should be used as a tourist attraction in Roztocze.
Assessment of lipid and protein peroxidation markers in non-pregnant and pregnant female dogs
Authors: Szczubiał M. , Kankofer M. , Dąbrowski R. , Bochniarz M. , Urban-Chmiel R. 
Published: May 2015

AbstractThe aim of the study was to investigate oxidative stress during normal pregnancy in female dogs based on an evaluation of plasma markers for lipid and protein peroxidation. Twenty clinically healthy female dogs (10 non-pregnant and 10 pregnant) were used in the study. Blood samples from the pregnant animals were collected at 19-21, 38-40, and 56-58 days of pregnancy. Blood samples from non-pregnant female dogs were obtained between 20 and 35 days after ineffective breeding. As indicators of oxidative stress, we measured the following using spectrophotometric and spectrofluorimetric methods: thiobarbituric acid reactive substances (TBARS), radical cations of N, N, diethylpara-phenylene diamine (RC-DEPPD), sulfhydryl groups (SH groups), bityrosine and formylkynurenine. The mean plasma TBARS concentration in the pregnant dogs (0.486 ± 0.071 – 0.581 ± 0.191 μmol/g protein) was significantly higher (p<0.05) than that found in the non-pregnant animals (0.274 ± 0.111 μmol/g protein). A marked, although not significant, decrease in SH group content, as well as an increase in bityrosine and formylkynurenine concentration were concurrently observed in the pregnant dogs. No significant differences were found in terms of the studied markers in the pregnant animals when comparing the values obtained during the investigated periods of pregnancy, although there was a progressive decrease in TBARS concentration and a progressive increase in RC-DEPPD, bityrosine and formylkynurenine contents. Our findings suggest that normal pregnancy in female dogs is associated with oxidative stress. Further studies are necessary to establish the physiological ranges of antioxidative/oxidative profiles in pregnant dogs and to explain if and how the intensity of oxidative stress might contribute to the risk of the complications of pregnancy.
Test Studies of the Resistance and Seakeeping Performance of a Trimaran Planing Hull
Authors: Ma Weijia , Sun D. Hanbing , Sun D. Huawei , Zou D. Jin , Zhuang Jiayuan 
Published: May 2015

Abstract
Towing tank tests in calm water were performed on a trimaran planing hull to verify its navigational properties with different displacements and centres of gravity, as well as to assess the effects of air jets and bilge keels on the hull’s planing capabilities, and to increase the longitudinal stability of the hull. Hydrostatic roll tests, zero speed tests, and sea trials in the presence of regular waves were conducted to investigate the hull’s seakeeping ability. The test results indicate that the influence of the location of the centre of gravity on the hull resistance is similar to that of a normal trimaran planing hull; namely, moving the centre of gravity backward will reduce the resistance but lower the stability. Bilge keels improve the longitudinal stability but slightly affect the resistance, and the presence of air jets in the hull’s channels decreases the trim angle and increases heaving but has little effect on the resistance. Frequent small-angle rolling occurs in waves. The heaving and pitching motions peak at the encounter frequency of , and the peaks increase with velocity and move towards greater encounter frequencies. When the encounter frequency exceeds, the hull motion decreases, which leads to changes in the navigation speed and frequency.
“Bottomsets” of the lava−fed delta of James Ross Island Volcanic Group, Ulu Peninsula, James Ross Island, Antarctica
Authors: Nehyba Slavomír , Nývlt Daniel 
Published: May 2015

Abstract
Sedimentological study of the three geographically separated outcrops of bottom− sets of a single lava−fed delta (Pliocene) in the James Ross Island (Antarctica) allows recognition of six lithofacies.Deposits of traction currents, deposits of volcaniclastic debris flows and products of such flows transformations (both low− and high−density turbidity currents) and glacigenic deposits (subaqueous debris flows and traction/turbidity currents) were all recognised. Existence of submarine proglacial environment formed prior to formation of volcani− clastic deposits partly covering the subaqueous slopes of volcano is supposed. The principal role of mass flow processes was recognised and explained by relative steep slopes of the lava−fed delta. The distribution of lithofacies significantly differs in the individual outcrops. These variations in sedimentary succession and also in thickness of volcaniclastic deposits of “bottomsets” of the single lava fed delta suggest principal role of local conditions and paleogeography for development and preservation of this part of delta depositional system. Moreover proximal and distal setting can be followed and direct vs. more distant relation to over−riding lava−fed delta supposed. The sedimentary succession terminated by foresets of hyaloclastite breccia.
Optimal Height Of Land Development – An Economic Perspective
Authors: Żelazowski Konrad 
Published: May 2015

Abstract
Sky-scrapers are rising in the panorama of big modern cities more and more often, becoming a symbol of dynamic growth and prestige. High-rise development appears to be an answer to the expanding demand for new residential and commercial space as urban land prices continue to go up and the availability of land decreases.
This article aims to identify factors affecting the choice of optimal building height in the context of economic effectiveness. It also presents factors that determine the implementation of high-rise development projects. Given the complexity of this subject matter, emphasis is placed on its economic dimension.
Students’ Preferences On The Residential Real Estate Market In Polish Cities
Authors: Kempa Olgierd , Krajewska Małgorzata , Palicki Sławomir , Rącka Izabela , Wójta-Kempa Monika 
Published: May 2015

Abstract
The understanding of price-setting attributes operating on local real estate market is not only an essential element of property appraisers’ work, it can also greatly assist the professional activities of real estate agents. However, its primary importance is for the market – facilitating the decision-making processes of developers (developers become aware of the buyers’ expectations and preferences, making it possible to more accurately form market offers and pricing strategy).
With the use of computer-assisted interviewing, a questionnaire was designed to find out students’ preferences in the housing market of large Polish cities. The research was undertaken at six universities: Nicolaus Copernicus University in Torun, Poznan University of Economics, Wroclaw Medical University, Wroclaw University of Environmental and Life Sciences, University of Technology and Life Sciences in Bydgoszcz, and President Stanislaw Wojciechowski Higher Vocational State School in Kalisz. At each university, the survey was carried out on two groups of students: one included those who had chosen specializations related to the real estate market, the other one – students who did not explore the subject of the real estate market in their field of studies.
The research can make a significant contribution to the problems of real estate market analysis. The results are the first part of a broader concept of research, which ultimately aims to internationalize the findings.
Insulin Resistance Markers in Type 1 Diabetes Mellitus
Authors: Bîcu Mihaela Larisa , Bîcu Daniel , Vladu Mihaela Ionela , Clenciu Diana , Chirila Ana Maria Cristina , Vîlvoi Delia , Sandu Magdalena , Panduru Nicolae Mircea , Moţa Eugen , Moţa Maria 
Published: May 2015

Abstract
Insulin resistance (IR) is a fundamental disorder of type 2 Diabetes Mellitus (DM), but it is also involved in the etiopathogenesis of type 1 DM, with important implications in the onset and progression of micro- and macrovascular complications in type 1 DM. Overweight plays the main role in the increased incidence of both types of DM, exacerbating IR. The epidemic increase of overweight and obesity makes it difficult to diagnose the exact phenotype of DM, as IR and autoimmunity often coexist. Many studies showed an increase in incidence of micro- and macrovascular complications in patients with type 1 DM with IR, compared to patients with type 1 DM without IR. The gold standard of IR evaluation is represented by the method of euglycemic-hyperinsulinemic clamp, applied on a reduced scale in research. Thus, it is necessary to identify early IR markers (clinical or biological markers), less laboured ones, that could be used on a large scale in current medical practice, for the IR determination in type 1 DM. Clinicians and health experts should prevent/ reduce the epidemic of overweight and obesity in young people, thus decreasing IR, and implicitly the chronic complications of DM.
Supporting Novice Teachers Through Mentoring and Induction in the United States
Authors: Zembytska Maryna 
Published: May 2015

Abstract The study focuses on the U.S. system of novice teacher support. The study highlights the evolution of mentoring from a traditional, isolated, hierarchical one-to-one relationship to multiple interactions which comprise a collaborative developmental network. The findings suggest that mentoring and induction support in the United States are continually progressing to conform to the dynamic trends in education and organizational management, which is evident in the diversification of their forms and types. American educators and policymakers extensively use new forms of mentoring, such as online mentoring, group mentoring, reciprocal mentoring, needs-driven mentoring etc. The analysis of induction and mentoring programs, district professional development plans and other documentation, carried out in the process of research, reveals their core components, goals and the peculiarities of their design and implementation. Special attention is given to mentor training, selection and matching. Novice teacher support is viewed as an effective instrument which allows school districts to reduce teacher turnover, improve student achievement by providing students with quality instruction and promote collaboration within teaching staff and administration.
Soluble urokinase-type plasminogen activator receptor (suPAR) – a possible biomarker for bacteremia in sepsis / Forma solubilă a receptorului pentru activatorul de plasminogen de tip urokinază (suPAR) – un biomarker posibil pentru bacteriemie în sepsis
Authors: Georgescu Anca-Meda , Szederjesi Janos , Voidăzan Septimiu , Dobreanu Minodora , Copotoiu Sanda Maria , Huțanu Adina , Azamfirei Leonard 
Published: May 2015

AbstractBackground. Validating new sepsis biomarkers can contribute to early diagnosis and initiation of therapy. The aim of this study is to evaluate the sepsis predictive capacity of soluble urokinase plasminogen receptor (suPAR) and its role in evaluating the prognosis of bloodstream infections. Material and method. We conducted a prospective pilot study on 49 systemic inflammatory response syndrome (SIRS) patients admitted to the intensive care unit (ICU), that were divided, on the basis of bacteremia in group A (SIRS with bacteremia, n=14) and group B (SIRS without bacteremia, n=35). Hemoculture and blood samples were drawn on the first day to determine suPAR, C-reactive protein (CRP) and procalcitonin (PCT). We set to identify significant cut-off values in estimating bacteremia and mortality in septic patients. Results. In group A, suPAR values were 14.3 ng/mL (range 10-45.5 ng/mL) and in group B, 9.85 ng/mL (range 3.4-48 ng/mL) p=0.008. Area under the curve (AUC) for suPAR was 0.745 (95% CI: 0.600-0.859), for CRP 0.613 (95% CI: 0.522-0.799) and for PCT 0.718 (95% CI: 0.477-0.769). Cut-off value for suPAR in bacteremia prediction was 9.885 ng/mL, with 100% sensibility and 51.43% specificity. Mortality in group A was 85.7% (12/14) and in group B 74.3% (26/39), p>0.05. Area under the curve (AUC) for suPAR was 0.750 (95% CI: 0.455-0.936), for CRP 0.613 (95% CI: 0.413-0.913) and for PCT 0.618 (95% CI: 0.373-0.888). Cut-off value of suPAR in predicting mortality was 11.5 ng/mL, with 66.67% sensibility and 100% specificity. Conclusions. In our study suPAR had a predictive capacity for bacteremia and seems to be an independent factor for mortality prognosis in septic patients.
Relation Between Filtration and Soil Consolidation Theories
Authors: Strzelecki Tomasz , Strzelecki Michał 
Published: May 2015

Abstract
This paper presents a different, than commonly used, form of equations describing the filtration of a viscous compressible fluid through a porous medium in isothermal conditions. This mathematical model is compared with the liquid flow equations used in the theory of consolidation. It is shown that the current commonly used filtration model representation significantly differs from the filtration process representation in Biot’s and Terzaghi’s soil consolidation models, which has a bearing on the use of the methods of determining the filtration coefficient on the basis of oedometer test results. The present analysis of the filtration theory equations should help interpret effective parameters of the non-steady filtration model. Moreover, equations for the flow of a gas through a porous medium and an interpretation of the filtration model effective parameters in this case are presented.