bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new method for photodynamic disinfection of prosthetic constructions and impressions in prosthetic dentistry
Authors: Vlahova Angelina P. , Kisov Christo K. , Popova Elka V. , Haydushka Irina A. , Mantareva Vanya N. 
Published: April 2013

ABSTRACT
INTRODUCTION: Photodynamic therapy is a topical treatment of pathogens that involves the use of a photoactive dye (photosensitizer), which is non-toxic when not exposed to light and activated by light of a specifi c wavelength in the presence of oxygen. The highly cytotoxic oxygen species generated by the induced photophysical processes inactivate the pathogenic cells.
The PURPOSE of this study was to present a new method we developed for photodynamic disinfection of prostheses and impressions in prosthetic dentistry and to assess its effectiveness in comparison with some conventional methods of disinfection.
MATERIALS AND METHODS: The method was developed on the basis of series of experimental studies (30 experiments for each type of disinfectant, 30 controls with no disinfection for each material, and 30 direct cultures of each test microorganism - MRSA, P. aeruginosa and C. albicans) using standard test specimens made of prosthesis plastic and impression materials.
RESULTS: The new method of photodynamic disinfection with GaPc1 as photosensitizer was 100% effi cient in C-silicones, A-silicones and polyethers, but not in alginates (40%). To plastics the photodynamic method shows the same effi ciency as the conventional disinfectants of hypochlorite solutions and denture cleansing tablets (100% effect).
CONCLUSION: The method of photodynamic disinfection we developed is a good therapeutic choice against orally transmitted diseases in prosthetic dentistry.
Economic aspects of medical errors
Authors: Stoyanova Rumyana G. , Raycheva Ralitsa D. , Dimova Rositsa Tz. 
Published: April 2013

ABSTRACT
The critical problem of medical errors and the associated costs has recently been increasingly in the focus of attention of a number of world renowned experts. In the present article we review in detail and analyse the economic aspects of this problem. A methodology to assess the cost of medical errors and an algorithm for their prevention are presented. The cost of a medical error and the expenses required to avoid and prevent it are compared using graphical analysis of the prevention cost curve and the medical error compensation damages cost curve.
Epigenetic aspects in schizophrenia etiology and pathogenesis
Authors: Popov Nikolay T. , Stoyanova Vili K. , Madzhirova Nadezhda P. , Vachev Tihomir I. 
Published: April 2013

ABSTRACT
Epidemiological evidence suggests that etiology of schizophrenia may involve both the influence of genetic factors specific for the individual and the impact of the environment. It is quite likely that a crucial role in the disease development is played by molecular mechanisms mediating the interaction between genes and environment. Modern research have shown that epigenetic mechanisms or chemical modifications of deoxyribonucleic acids (DNA) and histone proteins remain unstable throughout life and can be changed by environmental factors. Thus the epigenetic mechanisms outline an attractive molecular hypothesis of the environment modelling role and the environmental contribution to schizophrenia progression. We give in the present study a general outline of schizophrenia as a pathological entity and discuss the role and involvement of environment versus genetic determinant (nature versus nurture) in the pathophysiolgical processes. Additionally, we focus on DNA methylation discussing the evidence for the role of that process in schizophrenia. Thirdly, we review the post-translational histone modifications and their role in schizophrenia. These investigations might surely lead further to the development of epigenetic therapy that looks promising in regard to symptom alleviation and the disease-associated cognitive deficit.
Repeat transrectal prostate biopsies in diagnosing prostate cancer
Authors: Bakardzhiev Ivan V. , Dechev Ivan D. , Wenig Thilo , Mateva Nonka G , Mladenova Mladena M. 
Published: April 2013

ABSTRACT
Patients with negative prostate biopsy and persistent suspicion of prostate cancer (PCa) can pose a serious diagnostic problem.
The AIM of our study was to determine the frequency of PCa found on repeat prostate biopsy and the factors leading to higher possibility of cancer positive histological result.
PATIENTS AND METHODS: We studied retrospectively 113 patients (82 from University Clinic, Jena, Germany and 31 from Department of Urology, Plovdiv, Bulgaria) with initial negative biopsy for cancer who underwent repeat biopsies. The patients were examined between January 1999 and May 2010. The target group included patients with Prostate Specific Antigen (PSA) level lower than 12.5 ng/ml and without suspicious finding on digital rectal examination (DRE). Different biopsy schemes were used in the initial and the following biopsies, depending on patient age and total prostate volume.
RESULTS: Overall PCa detection rate was 22.1% (25 of 113). The repeat biopsy found PCa in 15.9% (18 of 113). In patients with 3 biopsies the PCa detection rate was considerably lower - only 8.6% (3 of 35). PCa was found in only 1 patient of 18 (5.5%) who underwent four or more biopsies. Transurethral resection of the prostate (TURP) was performed in 15 patients with at least two previously negative biopsies. The pathohistological examination of the resected tissue showed PCa in 3 of the patients (20%).
CONCLUSION: The interval between biopsies is not a significant predictive factor for positive prostate biopsy. The chance for detecting PCa after the second negative transrectal biopsy procedure is low. Therefore, TURP can be used as an alternative procedure to harvest adequate tissue material for pathologic examination, especially in patients with obstructive voiding symptoms.
Association of physical activity with insulin resistance, subclinical inflammation, coagulation, and fibrinolytic biomarkers among population at high risk for type 2 diabetes
Authors: Stefanov Tsvetan , Temelkova-Kurktschiev Theodora , Koehler Carsta , Henkel Elena , Schaper Frank , Hanefeld Markolf 
Published: April 2013

Abstract
Objective: To investigate the association of physical activity with insulin resistance and biomarkers of inflammation, coagulation, and fibrinolysis in a population at high risk for type 2 diabetes.
Patients and Methods: A total of 778 subjects from the Risk factors in Impaired Glucose Tolerance for Atherosclerosis and Diabetes (RIAD) study aged 40-70 years were included in the present cross-sectional analysis.
Results: Participants classified as having low physical activity (PA) were more insulin resistant in comparison to participants with medium (P = 0.042) and high PA (P = 0.015). Individuals with high physical activity had a significantly lower leucocytes count than individuals with low PA (P = 0.027) and significantly lower hs-CRP and fibrinogen concentrations than individuals with medium (P = 0.011 and P = 0.021) and low physical activity (P = 0.04 and P = 0.007). Although a trend towards a decrease in plasminogen activator inhibitor-1 (PAI-1) and tissue plasminogen activator (tPA) levels with increasing physical activity was present, significant differences were observed only between subjects with high and medium physical activity (P = 0.045 and P = 0.033). In multivariate regression analyses physical activity was an independent determinant of insulin resistance, leucocytes count, hs-CRP, and fibrinogen concentrations.
Conclusions: Physical activity was independently associated with insulin resistance and biomarkers of inflammation, whereas only a tendency towards decreased concentrations of coagulation and fibrinolytic biomarkers with increasing physical activity was observed.
Exercise Training Modes In Rehabilitation Of Patients With Chronic Heart Failure
Authors: Papathanasiou Jannis V. , Ilieva Elena M. , Nikolov Fedya P. 
Published: April 2013

Abstract
Modern cardiac rehabilitation (CR) in chronic heart failure (CHF) is a multidisciplinary process with the patient being the centre of the focus. Various CR models (inpatient, outpatient and home based) have been used the last two decades in the pursuit of higher effectiveness and better results.
The aim of this review is to present different exercise training modes applied in rehabilitating patients with CHF and to highlight their clinical value, advantages and disadvantages and practical implication.
Regulation of growth and some key physiological processes in salt-stressed maize (Zea mays L.) plants by exogenous application of asparagine and glycerol
Authors: Kaya Cengiz , Aydemir Salih , Sonmez Osman , Ashraf Muhammed , Dikilitas Murat 
Published: April 2013

Abstract
Maize seedlings were subjected to concentrations of 0 and 100mMof NaCl in Hoagland’s nutrient solution medium in plastic pots containing perlite. Two levels of asparagine (5 and 10 mM) and glycerol (20 and 40 mM) were sprayed onto the leaves of maize seedlings 10 days after germination. Saline stress caused considerable decline in total dry mass, chlorophyll content and relativewater content in the maize plants. It increased the activities of superoxide dismutase, catalase and polyphenol oxidase as well as electrolyte leakage, but did not alter the activity of non-specific peroxidise. Foliar application of asparagine or glycerol was found to be effective in checking shoot growth inhibition under NaCl stress. Exogenously applied asparagine or glycerol reduced superoxide dismutase, non-specific peroxidase and polyphenol oxidase activities in salt-stressed maize plants compared to those not treated with these organic compounds. Salinity increased Na+ contents but reduced those of K+, Ca2+ and P in the roots of the used genotype of maize. Foliar application of asparagine or glycerol increased the contents of K+, Ca2+ and P, but it reduced that of Na+ in salt-stressed maize plants as compared to those of the salt-stressed plants not supplied with glycerol or asparagine. Glycerol was more effective than asparagine in improving salinity tolerance of maize plants in terms of growth and physiological attributes measured in the present study
Stream water temperature: a short review with special reference to diurnal dynamics
Authors: Łaszewski Maksym 
Published: April 2013

Abstract
Dynamic changes in stream water temperature are caused by thermal energy exchange at the interface between the water and the atmosphere, and between the water and the streambed. This heat flux is the result of physical processes which are stimulated by external drivers that control water temperature both in temporal and spatial scales. For streams, the most characteristic are diurnal fluctuations of temperature. For the purposes of this paper, electronic data loggers were used which allowed a presentation of the diurnal cycles of water temperature in a small lowland river. The measurements confirmed that meteorological conditions have a significant impact on the diurnal dynamics of stream temperature.
Fractional Integral Inequalities for Differentiable Convex Mappings and Applications to Special Means and a Midpoint Formula
Authors: Zhu Chun , Fečkan Michal , Wang Jinrong 
Published: April 2013

Abstract
In this paper, Riemann-Liouville type fractional integral identity and inequality for differentiable convex mappings are studied. Some applications to special means of real numbers are given. Finally, error estimates for a midpoint formula are also obtained.
Applications of Some Hypergeometric Summation Theorems Involving Double Series
Authors: Srivastava H. M. , Qureshi M. I. , Quraishi Kaleem A. , Singh Rahul 
Published: April 2013

Abstract
The main object of this paper is to derive a number of general double series identities and to apply each of these identities in order to deduce several hypergeometric reduction formulas for the Srivastava-Daoust double hypergeometric function. The results presented in this paper are based essentially upon some
A Strong Law for the Size of Yule M-Oriented Recursive Trees
Authors: Javanian Mehri , Vahidi-Asl Mohammad Q. 
Published: April 2013

Abstract
Let Nt be the total number of nodes in a Yule m-oriented recursive tree at time t. Then {Nt : t ∈ [0;1)} is a Yule process with birth rates λn = (m(n - 1) + 1)λ for n ≥ 1, where N0 = 1. In this paper, we first give the exact distribution of Nt, then prove that , almost surely
Analysis and Load-carrying Capacity Estimation of Existing Railway Filler-beam Deck Bridges
Authors: Vičan Josef , Gocál Jozef , Odrobiňák Jaroslav , Hlinka Richard 
Published: April 2013

Abstract
In the paper, the actual condition of several existing concrete railway bridges with encased steel beams is discussed. This structural type represents relatively often solution for small span railway bridges in Slovakia. The main conclusions from inspections and in-situ diagnostics are published together with the results of the loadcarrying capacity calculation on the basis of new European codes. Despite of well-known disadvantages, the bridges with filler-beam decks are still demanded by railway authorities because of their big stiffness and small construction depth.
The Firing Temperature of Romanesque Brick from Pác
Authors: Podoba Rudolf , Štubňa Igor , Lukovičová Jozefa , Bačík Peter 
Published: April 2013

Abstract
A pavement brick taken from a Romanesque part of the church in Pác, in the Trnava County, Slovakia, was investigated by x-ray diffraction analysis (XRD) and thermal analyses as differential thermal analysis (DTA), thermogravimetry (TG) and thermodilatometry (TD). It was found that the brick contained dehydroxylated illitic clay, calcite and quartz. As revealed, dehydroxylation was completely finished and no redehydroxylation was observed. Partial decomposition of calcite was also found. The estimated firing temperature is between 600 °C and 700 °C.
The Annual Temperature Regime of Natural Physical Cavity and New Possibilities of its Energy Utilization
Authors: Bielek Milan , Bielek Boris , Híreš Juraj , Szabó Ján 
Published: April 2013

Abstract
Natural physical cavity. Quantification of annual temperature regime of natural physical cavity by in-situ experiment. Annual course of temperature of outdoor climate. Annual course of maximum temperature of natural physical cavity of optimal south-west orientation. Concept of new possibilities for energy utilization of air from natural physical cavities. Two-stage system for utilization of renewable energy sources.
Heat and Velocity Parameters of a Non-Isothermal Flow Generated by a Double-Chamber Air Diffuser
Authors: Klymenko Hanna 
Published: April 2013

Abstract
Heat and velocity parameters of the non-isothermal flow generated by a source panel-type double-chamber air diffuser with four horizontal shelf pressure equalizers of optimal relative length at the mid-horizontal level and in the vertical axisymmetrical plane. Irregularity ratios of initial velocities and temperatures of the air flow under study have also been defined.
Heating Systems Based on Thermal Generators with the Effect of Ranke
Authors: Zaytsev Oleg , Petrekevish Liliy , Bogatikova Nataliy , Perminov Igor 
Published: April 2013

Abstract
Results on the distribution of velocity, temperature and pressure in the proposed design of the vortex chamber. The effect of Ranke in this way of burning gas and a method for regulating heat removal in double-circuit boilers of small capacity.
Features of the Thermal Mode in the Building of Agricultural Industrial Complexes
Authors: Zhelykh Vasyl , Dzeryn Oleksandra 
Published: April 2013

Abstract
The analysis of the existent systems of heating for technology of growing pig lings is conducted and offered measures on the increase of efficiency work or such systems by application of the local heating. Presented results of experimental researches the thermal mode of area stay of pig lings. Graphic and analytical dependence temperature of internal air is resulted on the geometrical sizes workshop of pig lings and sow, mobile of air and middle temperature of heater mat.
Effects of Climate Change on Litter Production in a Quercetum petraeae-cerris Forest in Hungary
Authors: Kotroczó Zsolt , Veres Zsuzsa , Fekete István , Papp Mária , Tóth János Attila 
Published: April 2013

Abstract -
Climate change is a global problem. During the last century the increase of annual average temperature was 0.68°C, while the decrease of annual average of precipitation was 83 mm in Hungary. According to the long term meteorological data of Síkfőkút forest ILTER site the annual average temperature increased while average of yearly precipitation decreased, the forest climate became warmer and dryer. These processes could considerably contribute to forest decline, not only in the Quercetum petraeae-cerris stand of Síkfőkút, but everywhere in the country. Species composition and structure of the forest have changed considerably, as 68% of sessile oak (Quercus petraea) and 16% of Turkey oak (Quercus cerris) have died. Forest decline resulted in the breaking up of the formerly closed canopy, and consequently, in the formation of gaps in the forest. In the gaps, a secondary canopy developed with tree species of less forestry value. As a consequence, mass regeneration of field maple (Acer campestre) appeard in the gaps. The formation of gaps accelerated the warming and aridity of forests. In the article we answer the following question: how did climatic change and changing forest structure influence the leaf-litter production in the last four decades?
Investigation of the Applicability of Multi-Operational Logging Machines in Hardwood Stands
Authors: Horváth Attila László , Szakálos-Mátyás Katalin , Horváth Béla 
Published: April 2013

Abstract
- As a result of new developments in technology, harvesters may no longer be confined to softwood forests only. Several studies carried out in black locust, Turkey oak and beech stands have justified the use of these machines in hardwood stands. Evaluating the results of the cost and time analyses we concluded that harvesters are more efficient in several cases compared to traditional felling with chainsaws.
Testing of yarn abrasion
Authors: Krupincová G. , Hatipoglu J. 
Published: April 2013

Abstract

There exist a lot of methodologies, which can be used for yarn quality testing. Abrasion resistance and its
measurement for raw and sized yarn can help in the judgment of yarn weaving-ability. This article concentrates on
the possibility of yarn abrasion expression and testing. Relation among fiber material characteristics, selected yarn
structural, and mechanical parameters is discussed and a few experimental results are shown.
Spectrophotometric determination of ascorbic acid in grapes with the Prussian Blue reaction
Authors: Matei Nicoleta , Dobrinas Simona , Radu Gabriel Lucian 
Published: April 2013

AbstractThe objective of the present work was to adapt the Prussian Blue reaction for the determination of ascorbic acid. The procedure was successfully applied for the determination of ascorbic acid in red and white grapes (Vitis vinifera L.) just previous ingathering. In the present work was used the red and white grapes from Murfatlar vineyard: Mamaia, Cabernet Sauvignon, Merlot, Pinot Noir, Chardonnay, Sauvignon, Muscat Ottonel and Riesling Italian. The results were situated in the range of 0.67 - 1.79 mg vitamin C/100g product for red grapes and respectively 0.50 - 1.49 mg vitamin C/100g for white grapes.
Exploiting of the phenoxazine as first – ever use ligand in rapid spectrophotometric methods for the determination of chromium(VI) in environmental samples
Authors: Abdul Galil Mansour S. , Al Okab Riyad Ahmed 
Published: April 2013

AbstractTwo new rapid, accurate, sensitive, reproducible and economical spectrophotometric methods are described for the determination of hexavalent chromium in bulk and in environmental samples like, water and soil using two new electrophilic coupling spectrophotometric reagents, 2-amino-2′,5-dichlorobenzophenone (MCB) and 2-amino-5-chloro-2'-fluorobenzophenone (MFB) and first-ever use phenoxazine (PNZ). Both methods are based on the oxidation of (MCB) or (MFB) by chromium(VI) in hydrochloric acid medium and coupling with PNZ to yield red colored, which are stable for about 12 h and have an absorbance maximum 520 nm. Beer’s law is obeyed for chromium(VI) in the concentration ranges 0.15-1.20 μg mL-1 and 0.17-1.41 μg mL- 1 respectively. The optimum reaction conditions and other important analytical parameters were established to maximize sensitivity of these methods. Interference by various non-target ions was also investigated. The performance of these methods was further evaluated by recovery tests applying standard addition method, which indicated that there is no significant difference between the proposed methods and the standard reference spectrophotometric method.
The behaviour of the oxo-biodegradable LDPE materials during the service life
Authors: Teodorescu Corina , Mitrana Lica , Teiu Anca-Corina 
Published: April 2013

AbstractThis is an experimental study on behaviour of oxo-biodegradable plastics containing additives during service life. Low density polyethylene is a most extensive used synthetic polymer with the largest production, because an important part of the production is converted into various products with short life cycle. The goal of this paper was to quantify the biodegradation of two low density polyethylene films containing 10% and 20% pro-oxidant AddiFlex in soil columns. Previously, the physical-mechanical properties and heavy metal content in polymer films have been determined. The obtained degree of mineralization was around 60% after 200 days of incubation for both studied polymer films (59.8% for 10% additive and 64.3% for 20% additive).