bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Study of Polysulfone Matrix Based Composite Membranes Designed for Fuel Cells
Authors: Segarceanu Mircea , Miron Alexandra Raluca , Lica Carmen Georgiana , Oprea Ovidiu , Rikabi Abbas Abdul Kadhim Klaif , Vaireanu Danut Ionel
Published: February 2020

In this work, the synthesis and characterization of new types of composite membranes with polysulfone matrix and ionomeric polymer electrolyte: polysulfone-sulfonated polyetherether sulfone (PSf-SPEEK) or polysulfone - poly (styrene sulfonic acid-co-vinylpyridine (PSf-PSSA), with sulfonic groups, with high performances, but especially economically viable, are studied. The composite membranes have different behavior depending upon the two ionofores. This is both due to the different temperatures of the total dehydration and to the decomposing temperature specific to each combination. The most unfavorable observation is the weight loss of PSfD-PSSA and PSfN-PSSA at temperatures under 170�C, most probably due to improper reticular degree. Nevertheless, the thermals diagrams of the composite membranes slightly differ for the same ionofore, suggesting the possibility of usage of the composite membrane on a polysulfone support - obtained from either the available or more accessible solvent. This observation is not yet valid neither from the ionic interchange nor from the conductivity point of view, since the performances of the two composites drastically differ with respect to the supports used here (PSf-D and PSf-N). Comparing the thermic performances, the recommended usage order to consider for the composite membranes is: PSfN-SPEEK = PSfD-SPEEK ] PSfD-PSSA = PSfN-PSSA.From the electrical performances point of view, the composites classify in the following order: PSfD-PSSA ]PSfN-PSSA ]] PSfD-SPEEK ] PSfN-SPEEK. At this time of research, it is difficult to establish an optimal composite membrane for fuel cell, although the composite PSfD-PSSA seems to be preferred.
Clinical and Biochemical Considerations Regarding Stress and Arrhythmic Risk in Patients with Chronic Viral Liver Diseases
Authors: Gheorman Victor , Militaru Felicia , Calborean Veronica , Gheorman Lavinia Maria , Chirita Anca Livia , Mita Adrian , Galceava Oana , Gheorman Valeriu , Stanca Diana , Udristoiu Ion
Published: February 2020

The prevalance of depression and anxiety is higher at the patients diagnosticated with viral liver disease. The corelation between stress and chronic liver disease is a natural, implicit one, but still insufficiently studied. The study has the objective of finding out the clinical and also biochemical correlations between stress and chronic viral diseases. Our research was realised on a group of 78 patients with chronic viral liver disease, who underwent an evaluation of the stress level, both from a subjective point of view and based on concrete methods like questionnaires. The patients were asked to espress their state more or less affected by stress, and, subsequently, they were subjected to a questionnaire that was analyzed, followed by establishing the necessary correlations. Our patients were also evaluated by cardiologicaly, psychologicaly and psyhiatricaly examinations. After the first evaluation we had these results :38 patients (49.19%) consider that they have an average stress level, 18 patients (22.58%) have a high stress level. Only 22 patients (28.22%) declared stress was at a low level. We divided the pacients in two groups, function of Qt (questionare total score) results and we observed that a number of 38 patients ( 49.19%) registered �Qt 20 and 40 patients (50.81%) had Qt � 20, 63 patients (50.81%).We found a strong correlation between the patients� subjective evaluation of the stress level and the objective evaluation of stress level according to the used questionnaire, which confirms the objectivity of our study. We found a direct corelation, with a morphological, biochemical and functional support between stress and the arrhythmia risk in the evolution of chronic liver disease. We consider very important a complex examination psychiatricaly, psychologicaly and cardiological of the pacients diagnosticated with viral liver disease in order to help them and to prevent arrhythmic events, depression, anxiety and other mood disorders.
Theoretical and Experimental Analysis of SiO2 - a Proof of Hartman Perdok Method
Authors: Nicolov Mirela , Heghes Alina , Petre Izabella , Mederle Ovidiu Alexandru
Published: February 2020

In the present paper is done a comparison between simulation of the growth form of quartz crystal using attachment energies and SEM and AFM analysis. This comparison is done to make a complete analysis of quartz crystal. This analysis from theory to experiment and to applications for a-SiO2 presents a complete study of how are the results from simulations of growth forms of quartz crystals and which are the proofs given by SEM and AFM analysis that the obtained crystals are like in the simulations.
The Implications of Hyperglycemia in Maxilo-Facial Surgery
Authors: Ciurcanu Oana Elena , Cristescu Vasilica , Dragomir Raluca , Danila Vlad
Published: February 2020

In surgical practice, the problems raised by diabetics are extremely complex and require for solving the knowledge of both the physiopathological disorders characteristic of these disease and the changes caused on this pathological field by various dental aggressions. Sometimes, patients with complications of undiagnosed diabetes mellitus are present in the dentistry where all problems of dental and metabolic therapeutics must be solved by the dentist. The lack of knowledge of the general pathophysiology data of the diabetic mellitus disease and of the metabolitical rebalancing methods of these patients on dental aggressions as well as the lack of early knowledge of the events that precede the installation of real metabolic dramas can lead to disaster. The diabetic patient may present in time various dental conditions, some of which are directly or indirectly related to diabetic disease - lesions in the oral cavity are polymorphic and physiologically interpreted in a very different way. The oro-dental changes in diabetes mellitus have as substrate the degenerative arterial involvement in the context of early tissue aging. The hypoglycemia is a factor that makes doctors reluctant to maintain normal blood sugar levels in diabetic anesthetized patients. Hyperglycemia leads to glucosuria, then polyuria, which in turn causes dehydration of the patient through osmotic diuresis. Hyperglycemia decreases the patient�s ability to resist infections.During a period of 6 years, 2011-2016, we observed, treated and monitored a number of 75 patients with diabetes mellitus. Of these, 45 were men and 30 women and the age was between 18-65 years, with the highest incidence between 45-60 years.The importance of diabetic mellitus field in dental practice is not only determined by the high frequency of complications requiring surgery, but also that in these patients any aggression, even limited, can cause entry into a vicious circle where the local lesion aggravates the diabetic state and in turn it worsens the local development of the lesions. The appropriate premedication, protective antibiotic therapy, quality loco-regional anesthesia, rigorous applying of aseptic and antisepsic rules, soft, non-traumatic maneuvers, are mandatory measures addressed to the diabetic patient for performing risk-free surgery.
Reconstruction of Skull and Skull Base Defects Using Titanium, Collagen, Polyesterurethane and Other Alloplastic, Allogeneic, Xenogeneic and Autogenic Materials
Authors: Dabija Marius , Boisteanu Otilia , Dorobat Victor , Dargomir Raluca , Ibric Viorel , Costan Victor Vlad
Published: February 2020

We present our experience in the reconstruction of 12 defects of the skull and lateral skull base following the resection of advanced stage malignant tumors. The reconstruction was performed using three pectoralis major flaps and six temporalis muscle flaps, local skin flaps in two cases and one skin graft. For three dural defects, the plasty was performed using synthetic substitutes. In two cases titanium mesh was utilized for protection of the soft tissues. In one patient a gold plate was used to counteract the effects of facial nerve paralysis on eyelid closure. The advantages and disadvantages of the reconstructive methods are discussed, together with a literature review listing frequently used methods of skull base defect restoration, including autogenous tissues in the form of local, regional or distant flaps, as well as allogeneic, xenogeneic and alloplastic materials.
Analysis of air Quality in the Area of Coal-fired Power Plants
Authors: Tatar Adina Milena
Published: February 2020

The purpose of this study was to carry out an air quality analysis in the town of Turceni by monitoring the concentration of pollutants nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon monoxide (CO) and suspended particles with a diameter [10mm PM10) from the environment, given their impact on the health of the population. In this area the Gorj Environmental Protection Agency has a continuous air quality monitoring network, located northwest of Turceni Thermal Power Plant (GJ-3 - industrial station, which is part of the National Air Quality Monitoring Network). From the analysis of the data obtained during the monitoring it was found that 3 exceedences of the admissible limit value (L.V.) for the pollutant PM10 were recorded, representing 17.64% of the total values analyzed.
High Pressure Solvothermal Microencapsulation of D-Mannitol in Inorganic Shells for Thermal Energy Storage
Authors: Piticescu Roxana M. , Popescu Laura M. , Slobozeanu Anca E. , Tudor Albert I. , Piticescu Radu R. , Romero Sanchez Maria Dolores
Published: February 2020

D-Mannitol has been demonstrated by different authors as a new phase change material (PCM) for thermal energy storage with high latent heat, low cost, environmentally friendly chemical nature and suitable melting temperature for applications in solar collectors, space heating or industrial waste heat. The main drawback is their low thermal conductivity, affecting heat transfer properties. In this work, the microencapsulation of D-Mannitol in ZnO shells is evaluated as a procedure to increase the specific area of heat exchange. The inorganic shell based on ZnO has been selected for the microencapsulation using an in-situ solvothermal followed by spray drying. Characterization of the microcapsules obtained has been mainly carried out by XRD, DSC, IR spectroscopy and SEM. Results have shown that experimental parameters such as the pressure and reaction time for the solvothermal microencapsulation process determine the crystalline phases of the shell and their thermal energy storage properties (melting temperature and enthalpy).
Correlation Between Liver Cirrhosis and Risk of Cardiac Arrhythmias
Authors: Calborean Veronica , Miscoci Silvia Alina , Istratoaie Octavian , Galceava Oana , Alexandru Dragos Ovidiu , Guta Maria Manuela , Gheorman Victor , Padureanu Vlad , Fortofoiu Catalin Mircea , Dijmarescu Anda Lorena , Gheonea Dan Ionut
Published: February 2020

There are few studies analyzing the correlation between liver cirrhosis and cardiac arrhythmias. Still, factors triggering cardiac arrhythmias occur in many instances in liver cirrhosis.We studied a cohort with patientsdiagnosed with liver cirrhosis hospitalized to Cardiology Department, to the County Hospital of Craiova, between January 2017 and January 2018. We wanted to study the frequency of cardiac arrhythmias at the patients diagnosed with liver cirrhosis and also to evaluate several associated factors.The frequency of cardiac arrhythmias in the presence of risk factors was analysed using x2 test and statistical models.We analized multiple variable including demographics and clinical and biochemical characteristics, frequency of type of arrhythmias and evaluation of the associated factors like diabetes mellitus, hypertension, hypercholesterolemia, hypertriglyceridemia ,hyper/hypokalemia and hyper/hyponatremia. From our group, after exclusion criteria, we have a total of 34 patients with alcoholic liver cirrhosis, 37 patients with chronic HCV infection and 36 patients with HBV infection. From 34 patients with alcoholic liver cirrhosis, 23 patients presented atrial fibrillation(67.65%), from 37 patients with chronic HCV infection 21 were diagnosed with atrial fibrillation(56.76%) and from the patients with HBV infection 19 patients were known with atrial fibrillation(52.78%).We have encounter atrial flutter at 2 patients (5.56%) with chronic HBV infection. Atrial extrasystole was found at 7 patients with chronic HBV infection (19.44%), 4 patients with chronic HCV infection (10.81%) and 1 patients with alcoholic liver cirrhosis (2.94%). Ventricular extrasystole was found at 12 patients with chronic HBV infection (33.33%), 3 patients with chronic HCV infection (8.11%) and 5 patients with alcoholic liver cirrhosis (14.71%).We have also correlate the arrhythmias with different biochemical variables from our cohort. In our study there were many association between hepatic cirrhosis and cardiac abnormalities, which is concordant to reports from literature. Compared to population without liver cirrhosis, the prevalence of arrhythmias was increased in our cohort.
Prevalence of Cardiovascular Risk Factors Among Patients with Acute Myocardial Infarction and New Left Bundle Branch Block in North East Romania
Authors: Anghel Larisa , Arsenescu Georgescu Catalina
Published: February 2020

The prevalence of coronary artery disease, a major contributor to cardiovascular disease, is related to the increasing prevalence of modifiable risk factors.The aim of our study was to determine the risk factors for acute myocardial infarction among patients from North East Romania.We evaluated patients with acute myocardial infarction with or without left bundle-branch block, hospitalized in Georgescu Institute of Cardiovascular Disease Iasi for three years. The results of our study show that patients with acute myocardial infarction and new left bundle branch block have a more recent history of hypertension, dyslipidemia and smoker status compared to patients without left bundle branch block. Nearly two thirds of patients included in the study (65.47%) had an elevated cholesterol level, with a high prevalence of dyslipidemia in patients with myocardial infarction and new left bundle branch block. More than two-thirds of patients with new left bundle branch block had a history of arterial hypertension (69.04% vs. 50.0%, p = 0.354), especially grade 2 hypertension, with a slight predominance in those with new left bundle branch block, but without statistically significant differences between the two groups (45.23% vs. 30.95%, p = 0.358). Early identification of modifiable risk factors is vital to set the strategy for prevention and special attention must be paid to smoking. An adequate control of cardiovascular risk factors would result in a significant reduction of coronary events in patients from the North East part of Romania.
The Influence of the High Temperatures Thermal Shocks on the Microstructure and Harness of Zircaloy-4 alloy
Authors: Popa Iustin Alexandru , Rosu Andreea Elena , Neacsu Gabriel , Anghel Daniel Constantin , Rizea Vasile , Branzei Mihai , Ducu Catalin Marian , Dicu Maria Magdalena , Abrudeanu Marioara
Published: February 2020

This study aims at determining the influence of thermal shocks at high temperatures, over the allotropic temperature, on the microstructure, composition and hardness of the Zy-4 sheath. The thermal shocks have been applied at the temperatures between 900 and 1600�C, in the air, lasting 30 and 60 s, through rapid heating in the solar furnace. The treated samples were microstructurally analyzed on the surface and in section by scanning electron microscopy and EDS, thickness measurement of the formed layers, the oxygen and hardness profile determination in section relative to the treated surface. At the microstructural level, the researches have revealed the evolution of the morphology of the oxide layers formed under high temperature thermal shock conditions and the evolution of the microstructure of the metallic mass as the temperature and shock duration increase, correlating this evolution with the oxygen diffusion process and with the evolution of the microhardness. Researches have provided information on the Zy-4 alloy behaviour under accidental conditions.
Implementation of Holographic Research in Periodontal Disease
Authors: Manole Marius , Burde Alexandru Victor , Milea Claudia , Necsulescu Alina , Ciocoiu Robert , Trante Octavian , Sinescu Cosmin , Mohan Aurel , Dudea Diana , Ionel Dan Cristian , Baciu Sorana
Published: February 2020

In this paper were evaluated from a quantitative and qualitative point of view the retraction of the marginal periodontal tissues, using a holographic technique, subsequently validated through measurements accomplished with the help of acknowledged, consecrated soft wear.
Biochemical Effects of Retinoid Derivatives on Mesenchymal Stem Cells In Vitro
Authors: Vasincu Decebal , Iancu Roxana Irina , Cazan Ionut , Stoleriu Gabriela , Costuleanu Marcel
Published: February 2020

The studies we performed targeted the effects of all-trans retinol (vitamin A) and some retinoid derivatives (including tretinoin or all-trans retinoic acid, retinyl propionate, 9-cis retinoic acid, 13-cis retinoic acid), as well as of tazarotenic acid on apoptosis of rat mesenchymal stem cells, cultured after isolation. Tazarotenic acid is considered to be relatively selective and a potent agonist for RARb and RARg and less for RARa. The same time, tazarotenic acid is not binding to RXRs (retinoid X receptors). The relevant analysis of our experimental results demonstrated that 13-cis retinoic acid was the most potent inducer of apoptosis of cultured mesenchymal stem cells of rat origin when compared to other retinoid derivatives, as follows: 13-cis retinoic acid ] 9-cis retinoic acid ] tazarotenic acid ] all-trans retinoic acid ] retinyl propionate ] retinol (or vitamin A). Very interesting and unexpected were the apoptotic effects of 1 �M tazarotenic acid for 24 hours in our experiments, very close to those induced by all-trans retinoic acid (tretinoin). The apoptosis induced by 13-cis retinoic acid, a principal activator of RARb and RARg, and that induced by 9-cis retinoic acid, a major activator of RXRs, suggests different pathways activated by these retinoid derivatives.
Biodiesel Production from Waste Oil and Its Blends with Glycerol Ketals
Authors: Chipurici Petre , Vlaicu Alexandru , Raducanu Cristian Eugen , Bran Stefania Daniela , Gavrila Adina Ionuta
Published: February 2020

In the last years, researchers, governments, and industries spent significant resources towards biofuels production. Biodiesel has attracted attention as a renewable, non-toxic, and biodegradable fuel. In this work, biodiesel production using waste oil from the margarine industry is described. Another objective of this paper is additivation of biodiesel with glycerol ketals in order to improve the physicochemical properties. Biodiesel blends with additives were further analyzed and compared with the EN biodiesel specifications. The characterization of biodiesel blends revealed the improvement of their density, viscosity, cold filter plugging point, flash point, and iodine index.
Evaluating the Content of Active Principles from Wild Hypericum perforatum L. in Various Harvesting Seasons
Authors: Ionescu Elena , Iordache Tanta Verona , Tebrencu Carmen Elena , Cretu Ruxandra Mihaela , Florea Ana Mihaela , Radu Anita Laura , Zaharia Anamaria , Sarbu Andrei
Published: February 2020

Hypericum perforatum L., traditionally called St. John�s Wort has been used for decades as a phyto-therapeutic herb due to antidepressant, antimicrobial and antiseptic properties. As a result, the presented study evaluates the influence of the harvesting season for the Hypericum perforatum L. plant material, which is crucial for obtaining significant amounts of active principles.
Lipoprotein (a) Biology and the Role in Cardiovascular Medicine
Authors: Balanescu Serban , Bojinca Violeta , Balanescu Andra , Bojinca Mihai
Published: February 2020

Lipoprotein (a) -Lp(a) - is an apoB-based plasma lipoprotein associated with major cardiovascular disease (CVD). Hepatocytes produce it with no clear physiological role. The liver also catabolizes it by means of the LDL receptor. Close structural resemblance with plasminogen may induce an unconfirmed increased risk for thrombosis, while growth factor-like activity may have pro-inflammatory effects. It promotes atherosclerosis and stimulates macrophages to transform to foam cells under the intima. There is a strong inherited -genetic influence on serum Lp(a) levels. Kringle IV type 2 single nucleotide polymorphisms and copy number variations are the major determinants of Lp(a) concentration and volume. Small molecular volume determined by apo(a) isoforms are the most pathogenic for CVD. Serum Lp(a) levels are remarkably constant with age. Multiple epidemiologic trials demonstrated a strong association between Lp(a) levels and cardiovascular disease, mainly coronary disease and ischemic stroke. No specific treatment to lower Lp(a) and consecutive reduction in CV risk is currently available. PCSK9 inhibitors and plasmapheresis have the most profound effect on Lp(a) serum concentration.
The Effect of Antiviral Therapy on Lipid Metabolism in Patients with Viral Hepatitis C
Authors: Drochioi Ana Simona , Moraru Dan Cristian , Drochioi Ilie Cristian , Iorga Magdalena , Crauciuc Eduard , Moraru Evelina
Published: February 2020

The liver is the main metabolic organ, having complex physiological and biochemical roles, many of these functions being in a close relationship. It is also well known that hepatitis C virus infection is associated with changes in lipid metabolism. This is evident in liver dysfunctions, when liver functions are disturbed simultaneously. The aim of this study is to evaluate the effect of antiviral therapy on serum lipid level in patients with viral hepatitis C before and at the end of the 48 weeks of treatment compared patients treated with Interferon vs Interferon + Ribavirin and relation with sustained virological response, from North East Romania. We evaluated patients hospitalized in Emergency Hospital for Children St. Mary Iasi between 2009-2017. The result of our study show that the mean age of patients from goup 1 was 11.85�3.65 years, vs 11.5�3.1 years in group 2 (p=0.171). We found changes in cholesterol metabolism in both groups of patients, increases in total cholesterol level, 21.43% of patients in the group 1 vs 32.3% in goup 2 (p=0.258) and decreases 17.86% vs 14.7% (p=0.131). At initiation of antiviral therapy mean serum cholesterol level were 155.78�36.30 mg/dL, in group 1 vs 149.88�47.22 mg/dL, for group 2. At 48 weeks of treatment in the both goups revealed significantly decreased of total cholesterol levels 136.46�41.63mg/dL, for group 1 vs 109.26�41.05, for patients in group 2 (p=0.003). Triglycerides, HDL cholesterol and LDL cholesterol did not show significant changes in the patients of the two groups. Total cholesterol level after antiviral therapy were significantly different between patients who achieved SVR and non SVR (p=0.014), group 1 vs (p=0.001), group 2. Total serum cholesterol level showed significant changes during the antiviral therapy in both monotherapy and combination therapy group.
Calcifediol Concentration vs Circulating Thyrotropin and Free Thyroxine in Human Blood of Postmenopausal Women
Authors: Popescu Mihaela , Carsote Mara , Ghemigian Adina , Ionovici Nina , Calborean Veronica , Dinescu Venera Cristina , Albulescu Dana Maria
Published: February 2020

A total of 55 patients were: G1 of 9 patients, G2 of 23 subjects, and G3 of 23 patients. Similar age and years since menopause was found between the groups. There was no statistical significant difference between the groups regarding these aspects: p-value G1-G2 of 0.67, p-value G1-G3 of 0.72, p-value G2-G3 of 0.47. Similar results were obtained when TSH, FT4 and anti-thyroperoxidase antibodies were analysed between the groups. No TSH-25-OHD correlation reached the statistical significance, neither FT4-25-OHD, TPO-25-OD. P-values between G1 and G2 for TSH, FT4, TPO were 0.23, 0.38, respective 0.7, between G2 and G3 were 0.19, 0.1, 0.35, between G1 and G3 were 0.48, 0.84, respective 0.75. Bone profile analyze based on 25-OHD levels did not identify any statistical significance difference between the mentioned groups (including bone turnover markers).
Establishing the Optimum Composition of Superaluminous Refractory Products, Used for Steel Ladle Bubbling
Authors: Constantin Nicolae , Butnariu Ilie , Buzduga Radu , Dobrescu Cristian , Buzduga Miron
Published: February 2020

It is widely acknowledged by all specialists in the field of ferrous metallurgy that the porous peg of the kit for injecting inert gases into the steel casting ladle is the weakness of the entire assembly. This is the most prompted piece due to the thermal shocks that occur when injecting cold gas and the wear and tear and corrosion caused by disturbances in the steel during the injection process. The porous structure of the peg considerably weakens the physical properties and widens the surface of metal - refractory material contact thus enabling the destructive chemical action. In addition, the process of injecting oxygen for cleaning the metal peg also contributes to the destructive action and the substantial decline in its endurance. All these considered, it has been decided that the material for producing these items should contain at least 95% Al2O3 which means using only tabular alumina. As far as the binder is concerned, it has been established that a liquid chemical binder made of colloidal alumina should be used since this does not considerably diminish the Al2O3 content of the end product. It is the aim of this paper to bring forward the author�s research regarding the production of the porous plug using high-alumina refractory materials.
Mepivacaine Hydrochloride - an Efficient Local Anesthetic Solution for the Electroresection of the Benign and Preneoplastic Lesions of the Cervix and Uterus
Authors: Dimitriu Mihai Cornel Traian , Ionescu Cringu Antoniu , Gheorghiu Diana Claudia , Socea Laura Ileana , Bratu Ovidiu Gabriel , Constantin Vlad Denis , Ples Liana , Neacsu Adrian , Bobic Simona , Socea Bogdan
Published: February 2020

We are constantly concerned about improving the diagnostic and treatment conditions we offer to our patients, and starting from the observation that the widespread use of Mepivastesin 30 mg / mL(Mepivacaine Hydrochloride) anesthesia in dental and even buccal- facial interventions has a real success and increased safety profile, inspired and encouraged by its use for the local anesthesia during diagnostic hysteroscopy, we started to use this anesthetic substance in gynecology, for the local anesthesia necessary for the electroresection of the benign and premalignant lesions of the cervix. Thus, data was collected, regarding 527 patients who received such local anesthesia between 2007 and 2017 (10 years) and worked out a study that demonstrated that the method can be used with relief and safety for this type of minimally invasive gynecological interventions.
Influence of Electrolysis Parameters on Mo and W Coatings Electrodeposited from Tungstate, Molybdate and Tungstate-Molybdate Melts
Authors: Malyshev Victor , Gab Angelina , Shakhnin Dmytro , Donath Cristina , Neacsu Elena Ionela , Popescu Ana Maria , Constantin Virgil
Published: February 2020

Molybdenum and tungsten coatings electrodeposition from halide-oxide and oxide melts has been realized. The influence of electrolysis conditions on physico-chemical properties of deposits has been studied. Coating structure control has been realized with the help of change of atmosphere composition above the bath and application of non-stationary current regimes during electrodeposition.
Prevalence, Characteristics and Predictive Factors of Microalbuminuria in Resistant Systemic Arterial Hypertension
Authors: Gadau Carmen , Ardeleanu Elena , Folescu Roxana , Tilea Ioan , Varga Andreea , Zamfir Alexandra Simona , Boanca Mihaela , Dobrin Romeo Petru , Strat Liliana , Baaj Teim , Nicola Patricia , Luca Alina Costina , Gurgus Daniela
Published: February 2020

The present cross-sectional observational study was made in family medicine offices of Timi� County, Romania. The aim of the study was to investigate the prevalence of urinary microalbumin excretion (MAU) in resistant systemic arterial hypertension (RH), to analyze patients� biochemical and clinical characteristics, and the predictive factors for MAU. From a total number of 347 patients, MAU was detected in 76 cases (21.9%). The microalbuminuria positive patients were older, with significant higher office systolic blood pressure (BP) (155 � 13.50 vs 148 � 12.40 mmHg, p [ 0.0001) and diastolic blood pressure (94 � 12.20 vs 88 � 14.6 mmHg, p = 0.0013), higher prevalence of left ventricular hypertrophy, diabetes mellitus, obesity, ischemic and peripheral arterial disease. MAU positive patients presented statistical significant differences in biochemical data concerning: fasting plasma glucose (FPG) (118.80 � 32.02 vs 108.01 � 26.01 mg/dL, p = 0.003), impaired glucose tolerance (IGT) (10.52 % vs 4.94 %), glycated hemoglobin (HbA1c) (6.56 � 0.98% vs 5.96 � 0.91%, p [ 0.001), reduced estimated glomerular filtration rate (eGFR) (56.10 � 15.4 vs 69.30 � 17.5 ml/min/1.73m2, p [ 0.001) and higher potassium levels (4.71 � 0.43 vs 4.59 � 0.44 mg/dL, p = 0.0378). No significant differences were noticed regarding LDL- and HDL-cholesterol, triglycerides, uric acid and serum creatinine. In a logistic multivariate analysis independent predictors for MAU were: systolic BP (odds ratio, OR = 1.024, 95% confidence interval, CI:1.011-1.039, p [ 0.001), HbA1c (OR = 1.324, 95% CI: 1.078-1.724, p = 0.008) and eGFR (OR = 0.989, 95% CI: 0.977-0.999, p = 0.01). Our findings suggest that an important part of RH patients have microalbuminuria and highlight the importance of controlling its predictors, in order to improve patients� outcome.
Aspects of Cementation in Shoulder Hemiarthroplasty after Complex Fracture of the Proximal Humerus
Authors: Turcu Razvan , Moga Marius , Barbilian Adrian
Published: February 2020

The first uses of the polymers at the articular level were: joint components, cement fixation of prosthetic components at the bone, and sutures of tendons and ligaments. Since 1970, when polymethyl methacrylate (PMMA) was introduced, bone cement is the choice of choice to fix the prosthetic implant to bone. The cementation of the implant components is a commonly used procedure for hip, knee and shoulder arthroplasty: the femoral stem and the acetabular cup (in the case of total hip arthroplasty), the femoral and tibial components (in the case of total knee arthroplasty), the humeral stem (in hemiarthroplasty, total arthroplasty: anatomical or arthroplasty with inverse shoulder prosthesis) The objectives of this study are to establish the optimal indication of the cementing process, to evaluate and compare the results of cemented hemiarthroplasty, the real benefit from the immediate postoperative functional recovery program, for elderly patients with a diminished bone stock with complex fractures of proximal humerus. The success of the surgical treatment for complex fractures of proximal humerus depends to a large extent on establishing a correct diagnosis, an optimal surgical indication, a thorough preoperative planning, an optimal implant, a periarticular soft tissue reconstruction, and an effective postoperative recovery program.
Three-layer Permutation of the Phonionic Structure and the Influence of the Environment
Authors: Szota Michal
Published: February 2020

The study investigated the influence of permutation of a three-layer structure on the phononic system transmission. Phononic structures are used as mechanical wave filters. These composites are designed and manufactured to have specific properties. The most important property is the presence of phononic bandgaps (PhBG) in these structures. They are designed so that the PhBG occurs in a given frequency range. Knowledge of the impact of deployment of the layets in the structure allows better design of these filters. The analysis was carried out using the transmission matrix method (TMM) algorithm. The transmission structures was examined for all permutations of a system of three layers made of different materials. The structure consisted of mercury, epoxy, rubber and PNM-0.38PT. The materials are chosen so that their characteristics largely differ. The structure was surrounded by water. The tests were carried out for the frequency range up to 1 MHz. Cases with different thickness of layers were analyzed. The tests have shown that regardless of the layer thickness, only three types of transmission structures exist in the six permutations of the system. Systems in which the middle layer remained unchanged, while the outermost layers were changed, were characterized by the same transmission structure. Increasing the thickness of the layers increased the number of transmission bands. Transmission strongly depends on the environment.The absorption of the materials used was not taken into account in the work. Interesting results can be obtained by analyzing the permutation of more complex structures. Changing the order of layers in the filter without changing its characteristics may affect the reduction of production costs and easier design of structures with given properties. The article shows repeating phononic transmission structure for different types of layers alignment.
Synthesis and Spectral Analysis of New Antitumor Compounds with Benzimidazole Structure
Authors: Popovici Corina , Dorohoi Dana Ortansa , Sunel Valeriu , Cheptea Corina
Published: February 2020

Amidic compounds, derivatives of the 5-nitro-benzimidazolyl-2-mercapto-acetic acid were obtained in order to get new cytostatic substances. Two azotyperitic derivatives were obtained by the grafting of the di-(b-chloroethyl)-amine group on molecules of two of the amidic compounds. The NMR and FT-IR spectra confirmed the structure of the new compounds. The mitodepresive action of the new compounds has been tested on root meristems of Lepidiumm sativum L.
Non-Toxic Environment for Ferritic Nitrocarburising Process
Authors: Branzei Mihai , Cojocaru Mihai Ovidiu , Druga Leontin Nicolae , Tudose Florica , Trusca Roxana
Published: February 2020

Experimental research aimed to find a solution for replacing components with high toxicity (or generating such components as a result of reactions occurring in the environment at processing temperatures) from the environments used for ferritic nitrocarburising process (FNCP) with non-hazardous components, but extremely active during the process. In the temperature range in which this type of processing is applied (lower than the eutectoid transformation temperature in the Fe-N phase diagram), the most commonly used media are liquid or gaseous; liquid ones contain toxic components (sodium or potassium cyanates/cyanides), and gaseous ones require complex equipments. Packing is extremely rarely used, but in this case pack-mix contain toxic components (15 � 20 wt.% sodium or potassium ferrocyanide). Urea also called carbamide (CO (NH2)2) is the active component in the pack-mixing proposed to be used for FNCP. Carbamide is used in low temperature cyanidation thermochemical heat treatment (liquid FNC), together with sodium or potassium carbonates, resulting in very toxic reaction products (sodium or potassium cyanates). Compared to cyanidation, in the version proposed in the paper, the carbamide does not react with carbonates because they are not found in the composition of the environment but decomposes in the presence or absence of oxygen (by a disproportionation reaction) with the formation of some gas molecules interesting for the process. It has been concluded that the use of carbamide together with two other components, activated charcoal (having a triple role - dispersing, storage, surface saturation) and respectively ammonium chloride as surface reaction activator, is an effective solution for achieving the desired goals by applying this type of thermochemical processing to a wide range of products made of quality steels up to alloy miscellaneous steels.
ПСИХОЛОГІЧНИЙ СУПРОВІД ТРАНСФОРМАЦІЙНИХ ПРОЦЕСІВ В УКРАЇНСЬКОМУ СУСПІЛЬСТВІ ТА ОСВІТІ
Authors: Maksymenko Serhii
Published: February 2020

Представлено основні положення доповіді, проголошеної автором на загальних зборах НАПН України 17 грудня 2019 р. Дані положення розкривають результати фундаментальних і прикладних досліджень з означеної проблеми, які здійснюються співробітниками наукових установ, що входять до Відділення психології, вікової фізіології та дефектології НАПН України. Проаналізовано такі актуальні питання: сутність трансформаційних процесів в українському суспільстві та освіті і роль психологічного супроводу в їх забезпеченні; проблеми психічного розвитку особистості та психологічного супроводу освітніх процесів; проблеми психологічного супроводу учасників бойових дій, сімей загиблих, тимчасово переміщених осіб та їхніх дітей; психологічний супровід суспільних змін; психологічний супровід дітей з особливими освітніми потребами, запровадження інклюзії у закладах освіти. Розкрито завдання та результати наукових та освітніх проєктів, основні публікації, тренінгові та консультативні практики, різноманітні напрями та форми взаємодії з представниками освітніх, державних установ, міжнародних організацій тощо.
KEPUTUSAN PEMBELIAN ONLINE
Authors: Farhat Laila
Published: February 2020

Times have changed, technological progress is the cause. Consumers can find what they want at a better price, with good service, with guaranteed quality, with ease, and with interruptions. This is independence, the consumer determines the fate of the company. For them, leaving or being loyal is not a problem. Then it's time for the company to fix itself. This study examines all matters relating to purchasing decisions, especially those that affect dominantly. How customers are influenced to buy a product online, especially for the middle class. To answer that question, a quantitative approach is carried out by asking questions to respondents. The results showed, price is the main factor that influences the purchase. While service is a reinforcing factor in purchasing decisions
EFFECT OF CaO CONTENT ON GGBS BASED GEOPOLYMER CONCRETE
Authors: Patare D. S. , Chavana P. A. , Hake S. L.
Published: February 2020

GGBS based Geopolymer concrete is innovative composite material for civil engineering industry for which binding material cement and water is replaced bypozzolanic material like fly ash, GGBS and activated by highly alkaline solutions to act as a binder in the concrete. Mix design procedure used is proposed on the basis of quantity, fineness of fly ash, quantity of water, grading of fine aggregate, fine to total aggregate ratio and GGBS is used for M40 grade of GGBS based Geopolymer concrete. During experimental work, variation of different parameter like ratio of alkaline solution ratio (Na2SiO3/NaOH) of 2 was taken. Different molarities such as 12M and 16M of NaOH was taken. In addition, different percentage of such as 0%, 20%, 40%, 50% of GGBS with solution to fly ash ratio 0.38 and sodium silicate to sodium hydroxide ratio 2 was taken. The samples are cured in oven at 450C temperature for 24 hrs. The results show that the strength of geopolymer concrete increases with increase in percentage of GGBS in the mix. The strength increase up to 40% replacement of fly ash with GGBS after that it starts decreasing. In case of fly ash based geopolymer concrete as there is no CaO content so curing takes place due to polymerization process, but with the addition of GGBS in fly ash based geopolymer concrete curing is due to combine effect of polymerization as well as heat of hydration due to presence of alkaline solution and CaO respectively. As molarity of NaOH increases from 12M to 16M, compressive strength, flexural strength, split tensile strength also increases.
IMPLEMENTING A FLIPPED CLASSROOM STRUCTURE IN ENGINEERING EDUCATION BETTER SUITED TO THE INDUSTRY 4.0
Authors: El haini Jamila
Published: February 2020

The fourth industrial revolution or industry 4.0 which is a consequence of the rapid change of information is characterized by ultra-connected and flexible processes in order to develop rapidly a personalized product to be utilized in a limited time. This revolution requires new competencies named the soft skills. So, the challenge for educators is to train students with the soft skills needed in the industry 4.0. This is why; I implemented the flipped classroom method with a new structure based on PowerPoint presentation for the hydraulic and pneumatic systems’ course during the first semester of the 2018-2019 academic year. The flipped course was delivered for two classes in their fourth year of engineering studies in the National
School of Applied Sciences, Fez Morocco.

The flipped classroom method is being implemented in a growing number of higher education institutions, but I propose a new structure which aims to improve the engineering students’ soft skills especially the lifelong learning, critical thinking, curiosity, autonomy and communication and presentation techniques in order to success in this digital age and to meet the industry 4.0 requirements. The results of an anonymous survey and a t-test are very satisfactory and show that this method has a very positive feedback from the students. For me, I can approve that this method is a rewarding teaching experience with minimum technical, technological and logistical resources, but it requires more effort from the teacher who becomes rather a coach and a facilitator.
Current Population Statistics Do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap
Authors: Loyd R. O. Parke , Shkolnik Evgenya L. , Schneider Adam C. , Richey-Yowell Tyler , Barman Travis S. , Peacock Sarah , Pagano Isabella
Published: February 2020

We search for evidence of the cause of the exoplanet radius gap, i.e., the dearth of planets with radii near 1.8 R
⊕. If the cause were photoevaporation, the radius gap should trend with proxies for the early-life high-energy emission of the planet-hosting stars. If, alternatively, the cause were core-powered mass loss, no such trends should exist. Critically, spurious trends between the radius gap and stellar properties arise from an underlying correlation with instellation. After accounting for this underlying correlation, we find that no trends remain between the radius gap and stellar mass or present-day stellar activity as measured by near-UV emission. We dismiss the nondetection of a radius gap trend with near-UV emission because present-day near-UV emission is unlikely to trace early-life high-energy emission, but we provide a catalog of Galaxy Evolution Explorer near-UV and far-UV emission measurements for general use. We interpret the nondetection of a radius gap trend with stellar mass by simulating photoevaporation with mass-dependent evolution of stellar high-energy emission. The simulation produces an undetectable trend between the radius gap and stellar mass under realistic sources of error. We conclude that no evidence, from this analysis or others in the literature, currently exists that clearly favors either photoevaporation or core-powered mass loss as the primary cause of the exoplanet radius gap. However, repeating this analysis once the body of well-characterized <4 R
⊕ planets has roughly doubled could confirm or rule out photoevaporation.
Globular Cluster Formation from Colliding Substructure
Authors: Madau Piero , Lupi Alessandro , Diemand Jürg , Burkert Andreas , Lin Douglas N. C.
Published: February 2020

We investigate a scenario where the formation of globular clusters (GCs) is triggered by high-speed collisions between infalling atomic-cooling subhalos during the assembly of the main galaxy host, a special dynamical mode of star formation that operates at high gas pressures and is intimately tied to ΛCDM hierarchical galaxy assembly. The proposed mechanism would give origin to “naked” globular clusters as colliding dark matter subhalos and their stars will simply pass through one another while the warm gas within them clashes at highly supersonic speed and decouples from the collisionless component, in a process reminiscent of the Bullet galaxy cluster. We find that the resulting shock-compressed layer cools on a timescale that is typically shorter than the crossing time, first by atomic line emission and then via fine-structure metal-line emission, and is subject to gravitational instability and fragmentation. Through a combination of kinetic theory approximation and high-resolution N-body simulations, we show that this model may produce: (a) a GC number–halo mass relation that is linear down to dwarf galaxy scales and agrees with the trend observed over five orders of magnitude in galaxy mass; (b) a population of old globular clusters with a median age of 12 Gyr and an age spread similar to that observed; (c) a spatial distribution that is biased relative to the overall mass profile of the host; and (d) a bimodal metallicity distribution with a spread similar to that observed in massive galaxies.
Repeated State Change of Variable Gamma-Ray Pulsar PSR J2021+4026
Authors: Takata J. , Wang H. H. , Lin L. C. C. , Hu C.-P. , Hui C. Y. , Kong A. K. H. , Tam P. H. T. , Li K. L. , Cheng K. S.
Published: February 2020

PSR J2021+4026 is a radio-quiet gamma-ray pulsar and the first pulsar that shows state change of the gamma-ray emission and spindown rate. The state change of PSR J2021+4026 was first observed at 2011 October, at which the pulsar changes the state from high gamma-ray flux/low spindown rate state to low gamma-ray flux/high spindown rate state. In 2014 December, PSR J2021+4026 recovered the state before the 2011 state change over a timescale of a few months. We report that the long-term evolution of the gamma-ray flux and timing behavior suggests that PSR J2021+4026 changed the state near 2018 February 1 and entered a new low gamma-ray flux/high spindown rate state. At the 2018 state change, the averaged flux dropped from (1.29 ± 0.01) × 10−6 cts cm−2 s−1 to (1.12 ± 0.01) × 10−6 cts cm−2 s−1, which is behavior similar to that of the 2011 event. The spindown rate has increased by ∼3% in the new state since the 2018 state change. The shapes of pulse profile and spectrum in GeV bands also changed at the 2018 event, and they are consistent with behavior at the 2011 state change. Our results probably suggest that PSR J2021+4026 is switching between different states with a timescale of several years, like some radio pulsars (e.g., PSR B1828-11). PSR J2021+4026 will provide a unique opportunity to study the mechanism of the state switching.
Detection of Late-time Optical Emission from SN 1941C in NGC 4136
Authors: Fesen Robert A. , Weil Kathryn E.
Published: February 2020

We report the detection of broad, high-velocity oxygen emission lines from the site of SN 1941C nearly eight decades after outburst, making it the oldest optically detected historical core-collapse supernova (CCSN) and one of the youngest CCSN remnants with a well determined age. In contrast to the strongly blueshifted emission line profiles observed for other late-time CCSNe thought to be due to internal dust extinction of far-side hemisphere of expanding ejecta, SN 1941C’s spectrum exhibits stronger redshifted than blueshifted emissions of [O i] 6300, 6364 Å, [O ii] 7319, 7330 Å, and [O iii] 4959, 5007 Å. These oxygen emissions exhibit rest-frame expansion velocities from −2200 to

. No other significant broad line emissions were detected including Hα emission. We discuss possible causes for this unusual spectrum and compare SN 1941C’s optical and X-ray luminosities to other evolved CCSNe.