bluuebunny/crossref_metadata_2025_split huggingface dataset:
Kinetic study of the thermolysis process of oil sludge (atasu-alashankou) with nickel, cobalt and iron deposited on microsilicate
Authors: Tyanakh Sairagul , Baikenov Murzabek , Tusipkhan Almas , Aitbekova Darzhan , Balpanova Nazerke , Yun Ma Feng 
Published: May 2022

The object of research is the process of thermal degradation of oil sludge in the presence of heterogeneous catalysts.
The creation of efficient technological processes for processing the organic part of oil sludge into motor fuels, raw materials for petrochemicals and the disposal of microsilicate is an important urgent task, the solution of which will allow to obtain a significant economic and environmental effect. The problem to be solved is to establish the general kinetic laws of the process of thermal degradation of oil sludge in the presence of microsilicate with deposited metals. The advantage of the Ozawa– Flynn–Wall method is that it is possible to determine the kinetic parameters for each value of oil sludge conversion, that is, for different stages of thermal degradation. The activation energy of oil sludge 67.1 kJ/mol, and with a catalyst 59 kJ/mol are calculated for each degree of conversion (α), respectively. The value of the correlation coefficient was (R2≥0.997) provides good convergence with experimental results. Compared with other methods of thermal processing of oil sludge, catalytic thermal degradation has a number of advantages: relatively low process temperatures (400–650 °C), low sensitivity to the composition of raw materials and the processing process, which meets all modern requirements of chemical production.
Regularities of thermokinetic parameters of thermal decomposition of oil sludge were studied using raw materials obtained during the process of oil transportation, in the presence of catalyst with applied metal (nickel, iron, cobalt) to microsilicate. Obtained results of oil sludge decomposition kinetics can be used in creating a database for mathematical modeling of process of heavy hydrocarbon raw materials processing
Experimental and validation of significance and accuracy of oxidized low-density lipoproteins and myeloperoxidase in the screening of cardio-vascular disease
Authors: Mandsorwale Deepti , Sharma Bindu 
Published: May 2022

The aim. To access the superiority of myeloperoxidase & oxidized low-density lipoproteins over each other acts as a better predictive marker gaining information regarding the severity of cardiovascular disease.
Materials and methods. 215 subjects are taken into consideration of which 54 are healthy controls, 52 are from stable angina pectoris, 53 are taken from unstable angina pectoris and 56 subjects are from acute myocardial infarction. Lipid profile parameters, oxidative stress markers, plasma myeloperoxidase and plasma oxidized low density lipoproteins were estimated by kit methods, thiobarbituric acid reactive substances method, and colorimetric assay, sandwich and competitive enzyme linked immunosorbent assay techniques, respectively. Results were present as mean ± SD, p-values <0.05 as significant, and Student’s unpaired “t” test. Comparative analysis by box and whiskers plot to check skewness and deviations within the values. Data analysis was performed by software package SPSS version 17.0.
Results. The oxidized low density lipoproteins levels found significantly elevated in all three cases subgroup contrary to insignificant levels of myeloperoxidase in stable angina pectoris compared to control. Box and whisker plot of myeloperoxidase levels showed no skewness in stable angina pectoris (non-significant), whereas unstable angina pectoris and acute myocardial infarction showed right skewness (highly significant), whereas plots of oxidized low-density lipoproteins show extensive interquartile range in the stable angina pectoris subgroup, suggesting scattered deviation in the mean values compared to unstable angina pectoris and acute myocardial infarction subgroup.
Conclusions. The study concluded that significantly elevated level of oxidized low-density lipoproteins in stable angina pectoris, unstable angina pectoris, and acute myocardial infarction subgroups with a scattered deviation of oxidized low density lipoproteins levels in the stable angina pectoris subgroup reflects its low prognostic reliability compared to plasma myeloperoxidase with marginal deviation and in insignificant elevation in stable angina pectoris. Thus, plasma myeloperoxidase and oxidized low density lipoproteins levels serve as independent predictors of cardiovascular disease, but plasma myeloperoxidase levels predict an increased risk over oxidized low density lipoproteins for subsequent cardiovascular events in stable and unstable angina and extend the prognostic information gained from traditional biochemical markers
Hysterectomy with opportunistic salpingectomy and its influence on structural-functional parameters of ovarian tissue
Authors: Proshchenko Olha , Ventskivska Iryna 
Published: May 2022

The study examined the development of posthysterectomy syndrome in patients after hysterectomy with preservation of ovarian tissue.
The aim of the study was to assess the functionality of ovarian tissue in patients with hysterectomy and opportunistic salpingectomy performed for uterine fibroids.
Materials and methods of the research. The study was performed in 160 women of reproductive age. The first group included 90 patients after vaginal hysterectomy with tubectomy and associated with laparoscopy, the second group - 70 patients after abdominal hysterectomy with tubectomy. The control group included 50 women of reproductive age 45.7±1.3 years with asymptomatic fibroids. The diagnostic algorithm included assessment of hormonal status and instrumental study of structural and functional parameters of ovarian tissue both at the stage of preoperative observation and for 12 months, 3 and 5 years after surgery.
Research results and their discussion. At the preoperative stage in both groups found a higher percentage of thyroid disease, hypertension and metabolic disorders, as well as combined proliferative processes of the uterus. Normal ultrasound picture of the ovaries was found in 67.8 % - in the first group and in 47.1 % - in the second group. Significant increase in blood flow in the ovarian artery, in the remote period showing atrophic changes with the development of ovarian depletion syndrome. Assessment of hormonal status in both groups shows marked changes in baseline levels of gonadotropic hormones (FSH and LH): increase in baseline FSH levels by 2.2 times, LH - 1.5 times against the control group (p <0.05), dyshormonal disorders persist for up to 5 years after surgery in one third of cases, and up to 36 months - there is an increase in the proportion of cystic and trophic changes, most pronounced in patients with reduced ovarian reserve, dysmetabolic manifestations and combined proliferative processes of the uterus and appendages before surgery, and syndrome chronic pelvic pain and venous pelvic blood supply in the postoperative period.
Conclusions. The technique of performing a hysterectomy does not have a significant effect on the functional state of the ovaries in the long term. The main indicators of ovarian blood flow and steroid hormone production after hysterectomy with opportunistic salpingectomy for uterine fibroids are close to the reference values up to 36 months postoperatively
Identification of species of emeria of turkeys using regression analysis of morphometric indicators of ocycists
Authors: Liulin Petro , Bogach Mykola , Getmanets Oleg 
Published: May 2022

The aim. Identify the species of oocysts of turkeys by morphometric parameters.
Material and methods. Eimeria oocysts obtained from faeces of suspects and patients with spontaneous eimeriosis of turkeys of poultry farms of Kharkiv region served as material for the research. Methods used: parasitological, coprological, light microscopy, morphometry, mathematical and statistical, correlation and regression analysis, ANOVA variation statistics.
Results. Morphometrically (n=255) samples of turkey eimeria oocysts were studied and identified to the species: E. gallopavonis (n=50), E. meleagrimitis (n=50), E. adenoids (n=51), E. meleagridis n=53), E. innocua (n=51) according to identification indicators (X1 - length of the oocyst in μm; X2 - width of the oocyst in μm; X3 - area of the oocyst in μm; X4 - eccentricity of the model ellipse; X5 - ratio of the width of the oocyst to its length; X6 - largest curvature and X7 - smallest curvature in its model ellipse poles on the major and minor axes, respectively, in μm, X8 - presence - 1 or absence - 0 polar granules) which are mathematical expressions of morphometric dependences of the structure of eocystic oocysts which are confirmed by the results of regression and correlation analysis. The dependence of the Y oocyte species on seven characteristics has been proved.
Conclusions. The morphological features that are mathematical expressions of morphometric dependences of the structure and identification of the species of turkey oocysts are determined with high accuracy. The relative error in determining the type of turkey eimerias does not exceed 2 %
Aspiration Risk Factors in Hospitalized Patients Following Trauma
Authors: Lamb Augustus , Martinez Maximillian , Halimeh Bachar , Chen Guoqing , Winfield Robert 
Published: May 2022

Introduction. Risk factors for aspiration are not well characterized in the trauma patient population. Improved understanding is important due to features of this patient population that place them at high risk for morbidity and mortality with aspiration.
Methods. In a retrospective analysis of a select group of patients who suffered a traumatic injury, candidate and significant associations were identified for aspiration events.
Results. Of the 146 patients analyzed, 57 (39%) had at least one documented aspiration event while 89 (60.9%) patients had none. Multivariate logistic regression found a significant association between impaired consciousness and aspiration events (p = 0.012).
Conclusions. To our knowledge, this study is a novel characterization of trauma patients likely to have experienced an aspiration event while hospitalized. Our results suggest candidate risk factors for aspiration exist in a trauma-specific population. Impaired consciousness is likely to show a significant association with aspiration in trauma patients in future studies.
IVMCT: Image Visualization based Multiclass Malware Classification using Transfer Learning
Authors: Raman Kumar Manish Goyal, 
Published: May 2022

Computer systems have made it possible to transfer human life from the real world to virtual reality. This process has been accelerated by the Covid-19 virus. Cybercriminals have also switched from a real-life to a virtual one. Online, committing a crime is far easier than in real life. Cybercriminals often use malicious software (malware), to launch cyber-attacks. Apart from this polymorphic and metamorphic malware are used that use obfuscation techniques to create new malware variants. To effectively battle new malware types, you'll need to employ creative approaches that depart from the conventional. Traditionally signature-based techniques are used with machine learning algorithms to detect malware that is unable to catch its variants. Deep learning (DL), which differs from typical machine learning methods, might be a potential approach to the challenge of identifying all varieties of malware. In the present study, an IVMCT framework is introduced which classifies malware using transfer learning. For this purpose, the MalImg dataset is used which is based on grayscale images converted from binaries of malware. The comparison of IVMCT is done with existing techniques which shows that our technique is better than existing techniques.
Modelo predictivo para el cálculo de la fracción volumétrica de un flujo bifásico agua-aceite en la horizontal utilizando una red neuronal artificial
Authors: Hernández-Cely Marlon Mauricio , Ruiz-Díaz Carlos Mauricio , González-Estrada Octavio Andrés 
Published: May 2022

Este artículo presenta la aplicación de una red neuronal artificial (RNA) para el desarrollo de un modelo capaz de predecir la fracción volumétrica de un flujo bifásico compuesto por agua y aceite mineral en una tubería horizontal. Se utilizan las velocidades superficiales de cada fluido y el diferencial de presión en la tubería como parámetros de entrada de la red neuronal artificial multicapa con retropropagación, mientras que la fracción volumétrica de los fluidos se utiliza como parámetro de salida en el entrenamiento de la misma. Los 56 datos experimentales con los que se trabajó se obtuvieron en el laboratorio LabPetro - CEPETRO-UNICAMP. Los resultados que arrojó el modelo predictivo con mejor rendimiento presentan un error absoluto medio porcentual (AAPE) de 3,01 % y un coeficiente de determinación de 0,9964 utilizando 15 neuronas en la capa oculta de la red y la función de transferencia TanSig.
RETROGRADE PERIIMPLANTITIS (CLINICAL CASE)
Authors: Chernavskiy Aleksandr , Badalyan Araik 
Published: May 2022

To date, implantation has become quite a massive operation in public institutions. In the last 10 years, the number of complications at the surgical stage of implantation has decreased to a minimum. Numerous experimental and clinical studies prove the success of osseointegration of implants, but nevertheless the possible negative consequences of such operations persist. The increasingly frequent use of titanium supports leads to the emergence of clinical situations related to both the characteristics of the human body and the individual characteristics of a specialist doctor. It is also necessary to take into account the psychological characteristics of the patient's behavior in the treatment of such complications.
Subject. Professional and psychological capabilities of a doctor to work effectively in a situation of uncertain outcome of a surgical operation.
The relevance of this study is due to the need to prevent complications of implantation surgery in the professional activity of a dentist-surgeon. The need for this study was also dictated by the needs of patients using implantological systems in maintaining the quality of life.
The aim is to study the preservation of the implant in the event of apical peri-implantitis.
Methodology. A retrospective study was conducted on the basis of the State Medical Institution with "SP No. 12" of patients who underwent implantation treatment. Patients were included in the study if they had one or more implants without clinical signs of implant mobility.
Results. The patient was treated with surgical tactics to remove the formation in the area of the apical part of the implant; antibacterial therapy; mechanical curettage; chemical decontamination and the imposition of an allogeneic graft.
Conclusions. Retrograde (apical) reimplantitis was successfully cured by surgical curettage and the use of bone substitutes, and all implants are still in place after an average follow-up period of 1.44 years.
IMMUNOLOGICAL, PHYSICO-CHEMICAL AND BIOCHEMICAL PARAMETERS OF ORAL FLUID IN CHILDREN WITH CONGENITAL CLEFT PALATE AND POSTOPERATIVE PALATE DEFECT
Authors: Chuykin Oleg , Kuchuk Kristina , Chuykin Sergey , Mochalov Konstantin , Davletshin Nail' , AKATYEVA Galina , Makusheva Natal'ya , Ganieva Rimma 
Published: May 2022

Objectives. Analysis of oral fluid in children with congenital cleft palate and palate defect after uranoplasty.
Purpose. To analyze oral fluid in children with congenital cleft palate and palate defect after uranoplasty to determine the levels of pro-inflammatory (IL-1β, IL-6, TNF-α) and anti-inflammatory (IL-4, IL-10) cytokines and secretory immunoglobulin sIgA and evaluate physico-chemical (salivation rate, kinematic viscosity, pH) and biochemical parameters (calcium, magnesium, phosphorus, protein) of mixed saliva.
Methodology. The article presents the results of studying the parameters of the oral fluid of 109 children aged 6–12 years with congenital cleft palate and palate defect after uranoplasty and 50 practically healthy children of the same age.
Results. Hyperstimulation of pro-inflammatory (IL-1β, IL-6, TNF-α) and anti-inflammatory (IL-4, IL-10) cytokines in the oral fluid and a decrease in the average level of secretory immunoglobulin sIgA. In children with congenital cleft palate and defects remaining after uranoplasty, there was a deviation in the physicochemical and biochemical parameters of the oral fluid, which are manifested by a decrease in the rate of salivation, an increase in its viscosity and a shift in pH to the acid side. In contrast to the group of children without dental pathology, children with cleft palate and defects after uranoplasty showed a decrease in the content of total protein, phosphorus and calcium in the mixed saliva and an increase in the content of magnesium.
Conclusions. The obtained laboratory data indicate the presence of a local inflammatory process in the oral cavity and a decrease in local immunological anti-inflammatory factors. This should be taken into account for the development of methods for preoperative sanitation of the oral mucosa in children with congenital cleft palate and a palate defect after uranoplasty at the stage of preparation for reoperation.
DIGITAL TECHNOLOGIES IN ORTHOPAEDIC DENTISTRY: THE MODERN STATE OF THE ART IN RUSSIA. THE STAGES OF EVOLUTION IN DEVELOPMENT AND PERFECTION OF TECHNOLOGIES FOR DENTURE MANUFACTURING (A LITERATURE REVIEW)
Authors: Galonsky Vladislav , Surdo El'vira , Chernov Vladimir , Mirzoeva Maria , Karnaeva Anisat 
Published: May 2022

Subject. The possibilities provided by digital technology in clinical practice of orthopaedic dentistry in Russia is being quite successfully integrated into activity of healthcare facilities, which makes it possible to optimise diagnostic and treatment processes as well as to increase the competitiveness in the market of medical services including the international level. The main stages of evolution and perfection of technologies for denture manufacturing have been considered with detailed characterisation of the corresponding advantages and disadvantages of the developed technologies. The main directions for perfection of these processes based on digital technology have been determined, structural components of these advanced technologies, their advantages and development methods in modern conditions have been described.
The aim of the study. To study and analyse the modern development of digital technology in clinical practice of orthopaedic dentistry applied in Russia.
Materials and methods. The study was carried out based on the search and analysis of original articles on the issues in development and perfection of digital technologies in clinical practice in the ELIBRARY, PubMed and Cyberleninka databases. A total of 73 sources have been analysed (52 Russian and 21 foreign papers).
Conclusion. The use of modern digital possibilities in dentistry with application of computed tomography scanners, intraoral and extraoral scanning devices as well as innovative software integrating the obtained diagnostic data into practical implementation of subtractive and additive technologies in the process of manufacturing orthopaedic dental constructions occupies a certain niche within practical activity of dentists. The evolution of technologies for manufacturing of orthopaedic dental constructions has a vast and rich history. Each of the developed technologies has made a great scientific and practical clinical contribution to the development of orthopaedic dentistry. In modern conditions, the most promising digital technologies in clinical practice of orthopaedic dentistry from the standpoint of scientific and technical progress are additive technologies.
FINITE ELEMENT ANALYSIS OF THE HUMANA DENTAL IMPLANTS WITH AN INNOVATIVE SURFACE AND THREAD DESIGN TO REVEAL THE STRESS DISTRIBUTION IN THE IMPLANT, BONE TISSUE AND AT THE ABUTMENT-IMPLANT-BONE INTERFACE
Authors: Grishin Petr , Saleev Rinat , Ksembaev Said , Torgashova Ol'ga , Kalinnikova Elena 
Published: May 2022

This article presents the results of mathematical modeling of the stress-strain state of the finite element analysis of the justification for the use of Humana Dental implants with an innovative surface microstructure and thread design parameters during dental implantation. As a result of the study, after placing the implants in the created three-dimensional model, consisting of trabecular and cortical bones, it was revealed that the angle of implant placement significantly affects the distribution of stress in the bone. The rough, well-structured surface improves the contact of the implant with the bone. The stress distribution on dental implants with different geometry and thread design was revealed, and the most effective thread parameters for uniform load distribution were determined.
Aim. Substantiation of the use of Humana Dental implants with innovative macro-microstructure of the surface and thread design parameters during dental implantation in various clinical situations.
Material and methods. Samples of BioSink and Vega implants from Humana Dental were studied to assess the stress distribution by mathematical modeling of the stress-strain state in the cortical and spongy bone surrounding two models of implants with a diameter of 4.2 mm and a length of 11.5 mm, as well as with a different thread shape design. The implants were installed in the created three-dimensional model strictly vertically and at an angle of 30°. Geometric models were built in CAD Catia V5, the calculation was carried out in the software package Ansys R19.2.
Resalts. As a result of the study, it was revealed that in all cases the maximum concentration of stresses falls on the cortical layer of bone near contact with the implant, and in the spongy bone with vertical installation, maximum stresses in all cases are reached near the lower part of the implant. The peak voltage in the cortical bone was highest in the threaded part of the implants. When changing the angle of installation of the implant, the maximum voltages can increase many times, but when changing the thread pitch, only small fluctuations in voltages are noted, which do not fit into any trend. In the peri-implant region, the cortical bone showed a higher concentration of tension than the spongy bone.
Conclusions. The use of finite element analysis made it possible to identify the stress distribution on dental implants with different thread geometries and designs and to determine the most effective thread parameters for uniform load distribution.
Experimental research of the hantavirus survival in complexes with environmental substrates
Authors: Iunikhina O. V. , Kompanets G. G. 
Published: May 2022

Survival of viruses in the environment is a very important problem in epidemiology, especially for infections with indirect transmission. This work describes the results of the experimental study of adsorption and survival of the hantavirus on different environmental substrates (natural organic and inorganic sorbents). Bovine serum albumin (BSA) solution (5-10%) was effective in the hantavirus elution and phosphate-buffer saline (PBS) pH 7,2 was optimal for elution of specific RNA. Potential survival of the infectious hantavirus on environmental substrates was observed within up to 14 days at +4°С.