bluuebunny/crossref_metadata_2025_split huggingface dataset:
Crystal and electronic structure, N–H⋯N and C–H⋯O interactions in novel spiro-[chroman-chromene]-carboxylate
Authors: Vrábel Viktor , Sivý Július , Švorc Ľubomír , Světlík Jan , Peter Šafař 
Published: June 2017

Abstract
We report here the structure of new spiro-derivative, namely methyl (2R,4R)-4-(5-methylthiazol- 2-ylamino)spiro[chroman-2,2’-chromene]-3’-carboxylate, C23H20N2O4S, which crystallizes as racemate in the space group P-1. In this compound, the chromanone moiety consists of a benzene ring fused with a sixmembered heterocyclic ring which adopts a distorted half-chair conformation. The molecules are linked by a combination of N–H⋯N hydrogen bonds and weak C–H⋯O, C-H⋯S, C-H⋯π, inter- and intramolecular interactions resulting in a two-dimensional network in the crystal structure.
An exact block algorithm for no-idle RPQ problem
Authors: Pempera Jaroslaw 
Published: June 2017

Abstract
In the work a single-machine scheduling problem is being considered, in which all tasks have a fixed availability (release) and delivery time. In the analyzed variant no-idle time is allowed on a machine. The purpose of optimization is to determine such order of tasks that minimizes the makespan, i.e. the time of execution of all the tasks. There is also a number of properties of the problem presented, in particular there are formulated block eliminating properties for no-idle constraint. There was an exact B&B algorithm based on the block properties proposed.
Efficacy of plant-derived formulation “Argus Ras” in Varroa destructor control
Authors: Stanimirović Zoran , Glavinić Uroš , Lakić Nada , Radović Dejan , Ristanić Marko , Tarić Elmin , Stevanović Jevrosima 
Published: June 2017

Abstract

Varroa destructor is the most important honey bee parasite. There are various methods used in the control of this mite, but none of them meets all requested criteria, to be safe, effective and easy to apply. The objective of this study was to evaluate the varroacidal efficacy of newly created plant-derived formulation Argus Ras (mixture of extracts of Sophora flavescens, Ginkgo biloba, Gleditsia chinensis and Teucrium chamaedrys) in a field trial. The investigation was conducted on 240 Apis mellifera colonies equalized in respect of brood amount, adult bee population and food reserves. Efficiency was evaluated by applying Argus Ras consecutively with two other acaricides, amitraz and oxalic acid. Average acaricidal efficacy of Argus Ras was 80.89%, being higher of other previously tested essential oils. Besides, it showed a potential in knocking down the mites resistant to other acaricides. It should not be neglected that Argus Ras requires a smaller number of treatments and financial investments than other formulations used for the control of Varroa mites.
Evaluation and application of the TTA-rapid method in dogs with cranial cruciate ligament rupture
Authors: Arican Mustafa , Parlak Kurtuluş , Şahin Hüseyin 
Published: June 2017

AbstractThe objective of this study intended the application of the current technique of modified tibial tuberosity advancement (TTA)-rapid method in dogs with cranial cruciate ligament rupture (CrCL) and reports on the clinical outcome and complications. The study material consisted of 17 male dogs of different breeds between the ages of 2-8 years, average weight of 32 kg with a diagnosed unilateral CCL rupture. Hudson Visual Analog Scale (HVAS)-Walking Test Rating, Canine Brief Pain Inventory (CPBI)-Pain Rating) were examined, and rupture of the CCL was diagnosed based on direct radiographic examination. The pre-operative evaluation of the implant to be used in TTA-Rapid technique was determined by measuring radiographic images of the CCL in dogs. Post-operative evaluation in the 1st, 2nd, and at 3 month was performed by radiographic examination, gait and pain tests. Major complications were recorded in 17.6% of the cases. Fourteen (82.4%) dogs had a good to excellent outcome 3 months after surgery. Lameness and pain assessment were performed up to 15 days prior to the operation and 1, 2, and 3 months after the TTA-Rapid technique procedure.It can be concluded that TTA-Rapid technique procedure is a fast, easy to learn and non-invasive treatment of CrCL ruptures in dogs.
Economic Evaluation of Nano and Organic Fertilisers As an Alternative Source to Chemical Fertilisers on Carum Carvi L. Plant Yield and Components
Authors: Mahmoud Abdel Wahab Mohamed , El-Din El-Attar Asmaa Badr , Mahmoud Abeer Abdel 
Published: June 2017

Abstract
To show the benefits of organic agriculture, safe and sustainable production, the present research was performed in an open field (new reclaimed area of desert) of Wadi El-Notron, Beheira Governorate, Egypt, for two successive years (2013 and 2014) aimed at a better understanding and to investigate the role of alternative source of chemical fertilisers represented by humic substances, natural nano-zeolite-loaded nitrogen and biofertilisers (HNB) on yield, morphological, leaf and seed anatomy, chemical compositions reflected in macro and micro nutrients, indigenous hormones, plant pigments, total carbohydrates, ascorbic acid, thiamine, total phenolics, total flavonoids, total fatty acids, oil yield and constituents of caraway (Carum carvi L.) plants. Our results revealed that plants receiving a combination treatment (HNB) recorded significant increases over control in both growing seasons. Moreover, economic evaluation reflects the profound influence of combination treatment (HNB) that realized the maximum gross income and minimum production cost. These findings emphasize the magnitude of the role of natural soil additions and organic fertilisers in mitigating environmental pollution while providing safe production and also minimizing total costs of chemical fertilisers.
New Developments of Solar Energy Utilization in the Aspect of EU Directives
Authors: Barwicki Jan , Kuboń Maciej , Marczuk Andrzej 
Published: June 2017

Abstract
Photovoltaic systems are very efficient concerning proper utilization of solar radiation. However, the nanotechnology solution can replace the photovoltaic by the use of new production technology to lower the price of solar cells to one tenth. Sun provides nearly unlimited energy resource, but existing solar energy harvesting technologies are quite expensive and cannot compete with fossil fuels. The central part of Poland, which represents about 50 percent of the area, gives solar radiation at the level of 1000 kWh·m−2/year. Other new developments, which can help improve existing efficiency of solar systems are: diatoms utilization, artificial photosynthesis, nanoleaves and rotation solar towers.
Black hole spectroscopy via an action invariance in noncommutative spacetimes
Authors: Liu ChengZhou , Liu HaiWen 
Published: June 2017

Abstract
Spectroscopy for a modified Schwarzschild black hole in noncommutative spacetimes is investigated. By utilizing an action invariance of black holes, the equally spaced entropy spectrum characteristic of Bekenstein’s original derivation is recovered. The derived spectrum is independent of the noncommutative parameter θ, and holds for all the existed noncommutative black holes independent of mass. On the other hand, the obtained area spectrum is not always equidistant due to the noncommutativity effects of the modified spacetimes. For large black holes, the equally spaced area spectrum spectrum can be obtained at the leading order in θ. But, for small black holes, the derived area spectrum is not equidistant, and it depends the noncommutative parameter. In addition, the one loop back reaction effect on the spectroscopy of the noncommutative Schwarzschild black hole is discussed. In this calculation, due to the back reaction effect, the equidistant area spectrum can not be obtained for all the noncommutative black holes with both large and small mass. Conversely, the back reaction effect has no influence on the entropy spectrum. The obtained entropy spectrum is equidistant and consistent with the original Bekenstein’s spectrum for all the existed noncommutative Schwarzschild black holes.
Feasibility Study of the Method Choice of Manufacturing Screw Cleaning Elements with the Development and Use of Software
Authors: Rogatinskiy Roman , Hevko Ivan , Gypka Andriy , Garmatyk Oksana , Martsenko Sergiy 
Published: June 2017

Abstract
computer simulation of a curved profile formation on a helical spiral was carried out. A feasibility study was conducted in order to choose the method suitable for manufacturing of L-shaped helical spirals using specially developed software for calculating of the costs of helical spiral formation processes. The tables presenting technological characteristics of the design parameters of screw coiling working bodies manufactured by different methods are provided. The production costs for 1 meter of helical spiral with a curved profile manufactured by different methods are calculated. Theoretical and experimental investigations proved that the most cost-effective method of L-shaped helical spiral manufacturing is to coil it along the inner face from rectangular pieces with simultaneous or subsequent shelve formation.
Theoretical and experimental research of anti-tank kinetic penetrator ballistics
Authors: Motyl K. , Magier M. , Borkowski J. , Zygmunt B. 
Published: June 2017

Abstract
A mathematical-physical model of the hypersonic anti-tank kinetic subcalibre projectile for 120 mm munition was built. Computer simulations of the projectile flight were performed for any angle of shooting, from 0° to 90°. Trajectories of projectile flights were determined considering all angles of shooting. Theoretical calculations were verified by experimental measurement of the projectile velocity in time while shooting on a test range. Some conclusions with regard to safety during hypersonic projectile shooting on the test range were formulated.
Thermal Insulating Properties of Straw-Filled Environmentally Friendly Building Materials
Authors: Petkova-Slipets Rositsa , Zlateva Penka 
Published: June 2017

Abstract
The paper presents results of a research for determination of a few general thermal-physical properties of environmentally friendly building materials made by clay, sand and straw. The aim of this study is to establish their heat insulating and energy-efficient capacity. All specific measurements were carried out by using the newest generation thermal conductivity analyser Mathis TCi.
The results showed that the studied composite materials are good thermal insulators with thermal conductivity less than 0.5 W/m.K, which depends on the straw amount. Even less than 0.5 wt.% straw reflects on the insulating properties by decreasing the thermal conductivity coefficient with nearly 50 %.
Production of oxide coatings by sol-gel method and electrophoresis
Authors: Walczak Mariusz , Drozd Kazimierz 
Published: June 2017

Abstract
The paper reports the results of depositing SiO2 and SiO2-TiO2 coatings on titanium alloy Ti-6Al-4V ELI (ASTM-grade 5). Oxide coatings were deposited onto the titanium alloy substrate by sol-gel method and by electrophoresis. The produced coatings were chemically uniform, compact and highly dense. We then performed SEM microstructure examination, as well as microhardness and surface roughness measurements for different coating combinations. The significance of the results was assessed by the Shapiro-Wilk and t-Student tests using the STATISTICA software. It has been found that there are statistically significant differences in the hardness of SiO2 and SiO2-TiO2 coatings. The results of roughness parameters reveal significant differences only for individual coatings.
Variations of selected soil properties in the grass fields invaded and uninvaded by invasive goldenrod (Solidago canadensis L.)
Authors: Baranová Beáta , Fazekašová Danica , Manko Peter 
Published: June 2017

AbstractAlthough the invasion of exotic plants has been recognised as the serious cause of the biodiversity loss and natural habitats degradation and threat to the ecosystems functions, just the little attention has been paid to the potential impacts of the goldenrod invasion on the soil properties. Equally, currently obtained results are contrary and ambiguous. We tested whether the grass fields invaded and uninvaded by Canadian goldenrod (Solidago canadensis L.) differ in pH, soil moisture, organic carbon (Cox), humus and P, K and Mg contents and related the variations to the chosen environmental variables. We did not find significant distinctions of the studied types of habitats in the selected physico-chemical soil properties as well as the relation between the goldenrod invasion and the changes in soil properties. Nevertheless, whereas the soil reaction, soil moisture and Mg content were higher in the invaded soils, the Cox, humus and P and K contents were higher in the uninvaded ones. Doubtless, further attention need to be paid to this problem.
Efficiency of Public and Nonpublic Primary Health Care Providers in Poland
Authors: Lachowska Anna 
Published: June 2017

Abstract
The main aim of the paper is to reveal the outcomes of a research based on the efficiency of primary health care providers. The scientific goal of the mentioned research was the development of an efficiency measurement model and verification of its usefulness in practice. Overall, the research found that it is possible to use the efficiency measurement model for health care providers. Besides, significant differences were discovered in the efficiency of public and nonpublic primary health care providers. The research was conducted in the West Pomeranian Voivodship in Poland. This paper contributes to the widespread debate on public and nonpublic ownership in the field of healthcare. Also, it has practical implications as the research findings may be useful for any healthcare sector stakeholder, from decision makers to patients. The research was based on the literature overview, which allowed to elaborate the efficiency measurement model. The empirical research (based on a form of questionnaires) allowed testing the proposed model. The described efforts allowed drawing conclusions on the efficiency of primary health care institutions in the West Pomeranian Voivodship. The following methods of data analysis are presented in the paper: synthetic measure of development (SMD), Ward’s method, and k-means method. According to the main conclusion of the research, it is possible to measure the efficiency of public and nonpublic health care providers of the Polish healthcare system. The proposed model for measuring the socioeconomic efficiency may be used as one of the tools used to measure the efficiency in the primary care. The verification of the usefulness of the model showed that nonpublic health care providers operating in the field of the public sector, outperformed public providers. The paper contributes to the theoretical field as it reveals a comprehensive approach to the efficiency measurement in the health care sector. The efficiency measurement model is based on the three major pillars of the healthcare sector, namely, income/resources, cost, and the social aspect. The elaborated efficiency measurement model for the healthcare sector was implemented and tested on a group of primary health care providers in the West Pomeranian Voivodship. The research allowed for positive conclusions regarding its usefulness in practice.
The beidellite clays from the Bełchatów lignite deposit as a raw material for constructing waterproofing barriers
Authors: Ratajczak Tadeusz , Hycnar Elżbieta , Bożęcki Piotr 
Published: June 2017

Abstract
Disposal sites for both industrial and communal waste are hazardous for the natural environment due to the accumulated materials and their chemical, physical and biological transformations. The products of these processes migrating at a significant distance contaminate mainly underground waters, surface waters and soils. The spreading of the pollutants may be prevented by horizons of clay rocks that form natural geological barriers. The clay rocks of properly selected parameters may be used in the environmental engineering for constructing artificial water-sealing layers. The mineral, chemical, physico-chemical and physico-mechanical properties of the beidellite clays occurring within the lignite deposit in Bełchatów were studied to find out whether they meet the criteria of waterproofing engineering contained in the Polish recommendations and instructions. The results indicate that the beidellite clays of Bełchatów are rocks suitable for this kind of environmental engineering and may be used in constructing the barriers preventing the migration of effluents from landfills.
Synthesis, antimicrobial activity and anti-biofilm activity of novel tetrazole derivatives
Authors: Dofe Vidya S. , Sarkate Aniket P. , Kathwate Santosh H. , Gill Charansingh H. 
Published: June 2017

Abstract
In the development of antimicrobial agents, we designed and synthesized novel tetrazole derivatives. The structures of compounds 6a–f and 7a–f were characterized by IR, 1H NMR, 13C NMR, MS and elemental analysis. These compounds were tested for their antimicrobial activity against a series of strains Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Pseudomonas aeruginosa and for antifungal activity against the strains Candida albicans, Candida glabrata, and Candida tropicalis. Compounds 6e, 6f, 7a, and 7f exhibit potent antimicrobial activities compared to the reference drugs streptomycin and miconazole. Tetrazole derivatives 7a–f also inhibit biofilm formation and compound 7f exhibits best anti-biofilm activity with a biofilm inhibitory concentration (BIC) as low as 0.9 μm.
Post Activation Potentiation of the Plantarflexors: Implications of Knee Angle Variations
Authors: Gago Paulo , Arndt Anton , Ekblom Maria M. 
Published: June 2017

Abstract
Flexing the knee to isolate the single joint soleus from the biarticular gastrocnemius is a strategy for investigating individual plantarflexor’s post activation potentiation (PAP). We investigated the implications of testing plantarflexor PAP at different knee angles and provided indirect quantification of the contribution of gastrocnemius potentiation to the overall plantarflexor enhancements post conditioning. Plantarflexor supramaximal twitches were measured in ten male power athletes before and after a maximal isometric plantarflexion (MVIC) at both flexed and extended knee angles. Mean torque and soleus (SOL
RMS
) and medial gastrocnemius (MG
RMS
) activity were measured during the MVIC. The mean torque and MG
RMS
of the MVIC were lower (by 33.9 and 42.4%, respectively) in the flexed compared to the extended position, with no significant difference in SOL
RMS
. After the MVIC, twitch peak torque (PT) and the rate of torque development (RTR) potentiated significantly more (by 17.4 and 14.7% respectively) in the extended as compared to the flexed knee position, but only immediately (5 s) after the MVIC. No significant differences were found in the twitch rate of torque development (RTD) potentiation between positions. It was concluded that knee joint configuration should be taken into consideration when comparing studies of plantarflexor PAP. Furthermore, results reflect a rather brief contribution of the gastrocnemius potentiation to the overall plantarflexor twitch enhancements.
Methods and magnitudes of rapid weight loss in judo athletes over pre-competition periods
Authors: Kons Rafael Lima , Athayde Marina Saldanha Da Silva , Follmer Bruno , Detanico Daniele 
Published: June 2017

PurposeThe study aimed to analyse the methods and magnitudes of rapid weight loss (RWL) in judo team members in distinct periods before the biggest state competition in Southern Brazil.MethodsTwelve male judo athletes took part in the study. The data collection was performed in three periods: (1) three months before the biggest state competition, (2) one week before the competition, (3) the day prior to the event. Anthropometric assessment and the Rapid Weight Loss Questionnaire were performed. Student’s t-test and ANOVA were applied, with the significance level set at <i>p</i> < 0.05.ResultsThe main results showed that the majority of athletes reduced 7.1 ± 6.8 kg and started to lose weight to compete 13–16 years earlier. Increasing exercises (91.7%) and restricting fluid intake (41.7%) were the most frequent methods of weight loss. The judo coach/sensei was the person who most influenced the RWL procedure (58.3%). The athletes reduced 5% of their body weight (<i>p</i> < 0.01), 2.4% of their body fat (<i>p</i> < 0.01), and 2% of their fat-free mass (<i>p</i> = 0.04).ConclusionsWe conclude that RWL was a common and premature practice in the athletes in the study. The most common methods were increasing exercise volume and restricting fluid and food intake. The coach/sensei was the most influential person in this practice. The judo athletes presented decreases in body fat and fat-free mass during the period prior to the competition.
Accuracy of force repeatability in relation to its value and the subjects’ sex
Authors: Błacha Ryszard , Jastrzębska Agnieszka D. 
Published: June 2017

PurposeThe purpose of the study was to determine the influence of force value and sex on force generation repeatability.MethodsThe total of 17 female and 24 male students performed 3 maximal voluntary contractions for maximal force (F<sub>max</sub>) calculation and 10 isometric contractions with targeted forces of 49 N, 98 N, 147 N by arms: elbow extension (EE), elbow flexion (EF) and legs: knee extensions (KE). Variation in repeatedly generated forces is expressed as a coefficient of variation.ResultsThe force generation repeatability rose with the increase of triggered force in both sexes; between force target 49 N vs. 98 N and 147 N (<i>p</i> < 0.00) for EE and EF in females, between 49 N vs. 147 N for all measurements (<i>p</i> < 0.00) except the right elbow extension in males. We noticed minor sex influence on force generation repeatability for EE, EF, and KE in absolute measured values and relatively to F<sub>max</sub>.ConclusionsThe influence of force value and a minor influence of sex on accuracy in generated forces might suggest that the control of muscle force by the central nervous system is similar in both sexes and the sex differences in muscle force generations are rather of muscle mass and structure.
Tissue engineering and surgery: from translational studies to human trials
Authors: Vranckx Jan Jeroen , Hondt Margot Den 
Published: June 2017

AbstractTissue engineering was introduced as an innovative and promising field in the mid-1980s. The capacity of cells to migrate and proliferate in growth-inducing medium induced great expectancies on generating custom-shaped bioconstructs for tissue regeneration. Tissue engineering represents a unique multidisciplinary translational forum where the principles of biomaterial engineering, the molecular biology of cells and genes, and the clinical sciences of reconstruction would interact intensively through the combined efforts of scientists, engineers, and clinicians. The anticipated possibilities of cell engineering, matrix development, and growth factor therapies are extensive and would largely expand our clinical reconstructive armamentarium. Application of proangiogenic proteins may stimulate wound repair, restore avascular wound beds, or reverse hypoxia in flaps. Autologous cells procured from biopsies may generate an ‘autologous’ dermal and epidermal laminated cover on extensive burn wounds. Three-dimensional printing may generate ‘custom-made’ preshaped scaffolds – shaped as a nose, an ear, or a mandible – in which these cells can be seeded. The paucity of optimal donor tissues may be solved with off-the-shelf tissues using tissue engineering strategies. However, despite the expectations, the speed of translation ofin vitrotissue engineering sciences into clinical reality is very slow due to the intrinsic complexity of human tissues. This review focuses on the transition from translational protocols towards current clinical applications of tissue engineering strategies in surgery.