bluuebunny/crossref_metadata_2025_split huggingface dataset:
Role of New Hydrophilic Surfaces on Early Success Rate and Implant Stability: 1-Year Post-loading Results of a Multicenter, Split-Mouth, Randomized Controlled Trial
Authors: Tallarico Marco , Baldini Nicola , Gatti Fulvio , Martinolli Matteo , Xhanari Erta , Meloni Silvio Mario , Gabriele Cervino , Immacolata Lumbau Aurea 
Published: November 2020

Abstract
Objective To compare early implant failure and implant stability of one-stage Hiossen ET III implants with its new hydrophilic (NH) surface, compared with Hiossen ET III implants with the sandblasted and acid-etched (SA) surface at 1-year follow-up.
Materials and Methods This study was designed as a split-mouth, multicenter randomized controlled trial aimed to compare SA surface implants (SA group) and NH surface, (NH group). Outcomes were implant and prosthetic survival rates, complications, the insertion torque at implant placement, and implant stability quotient (ISQ) values.
Results Twenty-nine patients (mean age 59.9 ± 11.3 years) were treated and followed up to 1 year after loading. No patient dropped out. Fifty-eight implants (29 SA group and 29 NH group) were placed. No implants or prostheses failed and no complications were experienced during follow-up. The mean insertion torque was 40.5 ± 3.23 (38.17–41.83) Ncm in the SA group and 40.48 ± 3.49 (38.02–41.98) Ncm in the NH group (p = 0.981). There was a statistically significant difference at the second week (T2) with higher values in the NH group (p = 0.041). Similar results were found in the maxilla (p = 0.045), but not in the mandible (p = 0.362). A positive correlation was found between initial insertion torque and ISQ with higher value in the NH group (0.73 vs. 0.66).
Conclusions NH implants are a viable alternative to SA surface, as they seem to avoid the ISQ drop during the bone remodeling phase.
Managing the Anomalous Vertebral Artery in C1–C2 Stabilization for Congenital Atlantoaxial Instability
Authors: Rathakrishnan Roopesh Kumar Vadivel , Raghavendra Sunil Kapilavayi 
Published: November 2020

Abstract
Objectives This study aimed to demonstrate the technique of handling the anomalous vertebral artery in congenital atlantoaxial instability. The vertebral artery course can be variable in congenital atlantoaxial instability, especially if there is assimilation of atlas. The surgical technique to stabilize the atlantoaxial joint should ensure the patency and safety of the vertebral artery and prevents devastating stroke. Computed tomography (CT) angiography of the vertebral artery is mandatory in planning the surgical strategies. The vertebral artery can be injured during dissection of soft tissues between atlas and axis and can be compromised during distraction and instrumentation. The vertebral artery needs to be mobilized based on the tortuosity in the course during instrumentation and prevents compression of the artery against bony structures or screw heads. The vertebral artery has to be identified earlier in the course of dissection and should protect it. It is also imperative to choose the surgical approach that can be performed under vision using operative microscope rather than adapting blind procedures like transarticular screw. Here, in our present case, we demonstrate the technique of mobilizing the vertebral artery which was coursing medially preventing the access for the instrumentation and perform stabilization of atlantoaxial joint using Goel–Harms technique, and prevent its compression after placement of screw by deroofing the bony ridges of axis (Figs. 1 and 2). We also emphasize the various technical nuances during the stabilization with distraction of joint space of atlas and axis.The link to the video can be found at: https://youtu.be/pgURpF_jACc.
Association of Salivary Content Alteration and Early Ageusia Symptoms in COVID-19 Infections: A Systematic Review
Authors: Abduljabbar Tariq , Alhamdan Rana S. , Al Deeb Modhi , AlAali Khulud A. , Vohra Fahim 
Published: November 2020

AbstractCoronavirus disease 2019 (COVID 19) is a major threat to the health and prosperity of human life at present. It has resulted in loss of thousands of lives globally and has brought countries to the brink of economic, social, and health collapse. A major issue of this infection is the ease with which it transmits through salivary droplets and its survival for long durations outside the body. Therefore, its early detection is critical in prevention, diagnostic, and management efforts of COVID-19 patients. Loss of taste and smell is one of the early symptoms reported in these patients and the virus is abundantly found in the salivary secretion of the infected symptomatic and asymptomatic patients. Infection and inflammation of salivary glands are common among viral infections, particularly in the early stages, which lead to salivary composition changes. Chemosensory sensation of taste is critically dependent on the salivary flow rate and its inorganic constituents, protein levels, specific 3′,5′-cyclic adenosine monophosphate and 3′,5′-cyclic guanosine monophosphate levels, ghrelins, pH levels, and enzymes. Therefore, the question arises, “Does COVID-19 infection alter the salivary components and composition leading to early transient symptoms of Ageusia and hypogeusia?” This review shows association of the COVID-19 and Ageusia, in addition to the early viral infection of salivary glands and possible changes in salivary flow and content. Therefore, suggesting a potential association between early ageusia in COVID-19 infection and salivary compositional changes.
Relationship between Didactic Attendance and Average Ophthalmic Knowledge Assessment Program Performance
Authors: Altenbernd Todd W. 
Published: November 2020

Abstract
Background The Accreditation Council for Graduate Medical Education's ophthalmology-specific program requirements indicate that a resident must participate in 360 hours of educational activities over the course of residency. The requirements allow a variety of options by which this educational process may occur. Furthermore, the current generation of learners has used a large array of learning tools in their careers: digital media, online resources, question banks, flipped classrooms, problem-based learning, and asynchronous lectures in addition to the traditional face-to-face didactic lectures.
Objectives This article determines if the traditional face-to-face didactic lectures play a significant role in the education of ophthalmology residents, attempts to quantitate this role, and estimates the relative importance of this method.
Methods Lecture hours beginning immediately after an Ophthalmic Knowledge Assessment Program (OKAP) examination and up to the subsequent exam was tabulated for 40 residents over 8 years. From 2012 through 2019 each of the residents took the OKAP exam one to three times. The average overall OKAP score for each resident was then regressed against his or her logged hours of didactics that year. This rate of average OKAP score to lecture hours was then evaluated for significant differences on the basis of postgraduate year (PGY). “STATA 13.1 IC,” was used for all statistical analysis.
Conclusion Traditional synchronous didactic lectures play a statistically significant role in the education of ophthalmology residents. For each 3.5 hours of lectures per year there is a 1% increase in the average OKAP score, p = 0.0064. However, the amount of variability explained by this single factor is low, R
2 = 0.067, and other factors are presumed to play a large part in learning. PGY subgroup analysis showed significant difference in the OKAP performance to lecture hour relationship, the number of lecture hours attended, and the OKAP performance.
Anosmia/Hyposmia is a Good Predictor of Coronavirus Disease 2019 (COVID-19) Infection: A Meta-Analysis
Authors: Hariyanto Timotius Ivan , Rizki Niken Ageng , Kurniawan Andree 
Published: November 2020

Abstract
Introduction The number of positive cases and deaths from the coronavirus disease 2019 (COVID-19) is still increasing. The early detection of the disease is very important. Olfactory dysfunction has been reported as the main symptom in part of the patients.
Objective To analyze the potential usefulness of anosmia or hyposmia in the detection of the COVID-19 infection.
Data Synthesis We systematically searched the PubMed Central database using specific keywords related to our aims until July 31st, 2020. All articles published on COVID-19 and anosmia or hyposmia were retrieved. A statistical analysis was performed using the Review Manager (RevMan, Cochrane, London, UK) software, version 5.4. A total of 10 studies involving 21,638 patients were included in the present analysis. The meta-analysis showed that anosmia or hyposmia is significantly associated with positive COVID-19 infections (risk ratio [RR]: 4.56; 95% confidence interval [95%CI]: 3.32–6.24; p < 0.00001; I2 = 78%, random-effects modeling).
Conclusion The presence of anosmia or hyposmia is a good predictor of positive COVID-19 infections. Patients with onset of anosmia or hyposmia should take the test or undergo screening for the possibility of COVID-19 infection.
Acute Embolic Occlusion of Renal Artery after the Bentall Procedure: the Role of Primary Renal Angioplasty
Authors: Indriani Suci , Adiarto Suko , Andriantoro Hananto , Sunu Ismoyo , Siddiq Taofan , Dakota Iwan 
Published: November 2020

AbstractAcute renal occlusion is an uncommon emergency problem in daily practice. The diagnosis is often missed or delayed not only because of its rarity but also nonspecific of clinical presentation. Sudden and complete termination of arterial blood supply to the kidney may lead to renal infarction and a complete loss of renal function. Although the need of early revascularization is uniformly recommended, but the methods has not been established. We presented a case of acute thromboembolic renal artery occlusion in patient who had a history of Bentall's surgery. Renal infarction and artery occlusion were clearly visualized by computed tomography angiogram (CTA). The patient was successfully treated with angioplasty and stenting of main renal artery with complete disappearance of symptoms and recovery of his renal function.
Free-Floating Thrombus in the Distal Internal Carotid Artery Causing a Stroke
Authors: Papadoulas Spyros , Moulakakis Konstantinos , Kouri Natasa , Zampakis Petros , Kakkos Stavros K. 
Published: November 2020

AbstractWe present a patient suffering from a stroke with a free-floating thrombus extending up to the distal internal carotid artery. The thrombus was totally resolved after a 2-week anticoagulation regimen without leaving behind any severe residual stenosis in the carotid bulb. The optimal treatment of this rare condition remains uncertain. We report some important treatment strategies that have been used in the literature, emphasizing the anticoagulation as the mainstay of therapy. Immediate surgical and interventional manipulations carry the risk of thrombus dislodgement and embolization and should be considered if there are recurrent symptoms despite medical management.
Evaluation of the maximum inscribed circle based on the maximum chord and maximum angle
Authors: Li Xiuming , Yang Peng , Yan Yang , Liu Guotong , Liu Yuwei 
Published: November 2020

Abstract
The angle evaluation conditions, instead of maximizing the minimum radius, are proposed to deal with the maximum inscribed circle (MIC) based on a three-point model. According to the angle evaluation conditions, a corresponding chord-angle algorithm is given for evaluating the MIC by the maximum chord and its two maximum angles. Several examples have been carried out to assess the validity of the algorithms proposed.
Structural investigation and improvement of microwave dielectric properties in Ca(HfxTi1-x)O3 ceramics
Authors: Zaman Abid , Uddin Sarir , Mehboob Nasir , Ali Asad 
Published: November 2020

Abstract
Calcium hafnium titanate, Ca(HfxTi1-x)O3 (CHT) was prepared using the conventional solid state reaction route. The X-ray diffraction patterns were used for analyzing the phase compositions. The XRD patterns revealed the arrangement of a single phase perovskite structure and therefore the structure is transformed from non-centrosymmetric orthorhombic (Pbnm) to centrosymmetric cubic (Pm-3m) at 0.4 ≤ x. Lattice parameter, crystallite size, densities and porosity were calculated. The SEM morphology of CHT at various hafnium (x), which is comprises of round-rod shaped grains with small pores microstructure. The substitution of Hf4+ ions over Ti4+, the microwave dielectric constant (ε
r) decreases from 145 to 52, while the quality factor (Qxf) increases from 8105 to 24305 GHz and temperature coefficient of resonant frequency tuned towards zero τ
f ∼ 4.5 ppm °C−1. Good combination of microwave dielectric material properties was accomplished for the composition x = 0.8 (at 3 GHz).
Early classification of motor tasks using dynamic functional connectivity graphs from EEG
Authors: Shamsi Foroogh , Haddad Ali , Najafizadeh Laleh 
Published: November 2020

Abstract

Objective. Classification of electroencephalography (EEG) signals with high accuracy using short recording intervals has been a challenging problem in developing brain computer interfaces (BCIs). This paper presents a novel feature extraction method for EEG recordings to tackle this problem. Approach. The proposed approach is based on the concept that the brain functions in a dynamic manner, and utilizes dynamic functional connectivity graphs. The EEG data is first segmented into intervals during which functional networks sustain their connectivity. Functional connectivity networks for each identified segment are then localized, and graphs are constructed, which will be used as features. To take advantage of the dynamic nature of the generated graphs, a long short term memory classifier is employed for classification. Main results. Features extracted from various durations of post-stimulus EEG data associated with motor execution and imagery tasks are used to test the performance of the classifier. Results show an average accuracy of 85.32% about only 500 ms after stimulus presentation. Significance. Our results demonstrate, for the first time, that using the proposed feature extraction method, it is possible to classify motor tasks from EEG recordings using a short interval of the data in the order of hundreds of milliseconds (e.g. 500 ms). This duration is considerably shorter than what has been reported before. These results will have significant implications for improving the effectiveness and the speed of BCIs, particularly for those used in assistive technologies.
Study of tritium nearby a regional radioactive waste storage
Authors: Podlutskii M S , Lukashenko S N , Tomson A V , Oudalova A A 
Published: November 2020

Abstract
The paper introduces a pilot study of tritium as an indicator of possible transfer of radionuclide contamination around a regional radioactive waste storage. The main goal of the study is to determine tritium levels (tritiated water and organically bound tritium) and compare them with radiostrontium concentration in environmental samples. A hypothesis is tested on a possibility of using tritium as a marker of possible migration ways for other radionuclides, on an example of strontium-90. The results show that tritium concentrations nearby the regional radioactive waste storage is below the detection level (7 Bq·l−1). The lowest level of tritiated water was 7±1 Bq·l−1, the highest - 78±8 Bq·l−1. For organically bound tritium, the lowest level was shown at 8±1 Bq·kg−1, the highest - 57±7 Bq·kg−1. Comparison of the tritium findings with strontium-90 radioactivity levels showed that sampling points with high levels of tritium and radiostrontium are located in the same areas.
Features of investigation of the crimes with dissemination of NRM in the environment
Authors: Nitrean A I , Stebelkov V A 
Published: November 2020

Abstract
The crimes, which involve dissemination of NRM microparticles in the environment, are one of the possible types of terrorist attacks. These crimes aim to contaminate as large a territory as possible with radioactive particles and to irradiate as many people as possible. Therefore, they assume the dissemination in environment of NMR particles with sizes of about one micrometer. A full-scale investigation of such incidents includes the collection of environmental samples on the incident area and analysis of the collected NRM microparticles. Sampling at the scene of the incident should be carried out by an investigative team, including both law enforcement officials and NRM specialists. To determine the manufacturer of the disseminated material and the date of production of the material, the microparticles should be analyzed by scanning electron microscopy, X-ray microanalysis, and secondary ion mass spectrometry. Data on the informativeness of the morphological characteristics of microparticles, on the capabilities of methods for measuring the concentration of chemical elements in microparticles and on the accuracy of determining the isotopic composition of uranium are presented.
Bioassay of radioactive water contamination using duckweed Lemna minor and Spirodella polyrrhiza: experimental justification
Authors: Artamonova A A , Baldov D A , Mirzeabasov O A , Rasskazova M M , Synzynys B I , Shatalova R O 
Published: November 2020

Abstract
Experimental data on assessing the impact of acute gamma irradiation on growth parameters and the nature of damage to fronds of Lemna minor L. and Spirodella polyrrhiza L. is presented. An actuality of the study is determined by the need to identify radiosensitive species for their use as reference species. In this work, radiosensitivity of two species of duckweed was determined through different biological parameters. It is found that the growth parameters of Lemna minor L. are possible to use to assess the degree of radioactive contamination.
Methodology for assessing the impact of lead on farm animals under chronic intake with the ration
Authors: Mirzoev E B 
Published: November 2020

Abstract
The methodology for assessing the impact of lead on farm animals under chronic intake with the ration is based on the lead metabolism and mechanism of biological action. When assessing the impact of lead, the environmental and epizootic situations, as well as the health of farm animals at different levels of biological organization: cell – organ – organism – population are studied. According to the results of environmental and epizootic studies the acting and concomitant factors, the scope of pollution, levels of contamination of soil, drinking water and feeds, the duration of lead intake with the ration into farm animal are determined. Under assessment of the animals health, along with the biomarkers “exposure” and “effect”, generally established clinical, hematological and biochemical indicators are determined. If necessary, the morphological state of organs and tissues (liver, kidneys, spleen, bone marrow, heart, lungs) is studied. The presented methodology will allow us to more correctly assessing the impact of lead on farm animals in environmentally disadvantaged regions.
Main principles of robust Industrial Hygienic Monitoring Program at Pharmaceutical Production
Authors: Pozharnov I , Frantskevich E , Zhiltcov P 
Published: November 2020

Abstract
Producing life-changing medicines that patients need we must remember about our employees. Exposure assessment is a critical step in the chemical risk assessment process and must be evaluated based on the conditions at each specific facility, task or setting. An appropriately made estimate of potential exposure is the link between hazard identification and decisions about controls in the risk management approach. Exposure assessment may be qualitative, quantitative or a mixture of both. Qualitative means a study based on observation and indicative techniques to identify steps where there is potential for exposure. A quantitative study is based on measurements. But any quantitative study will be supported by qualitative as it is required by proper observation of the process.
Heavy metals in the snow cover in the area of the location of the Russian electrometallurgical plant LLC “NLMK-Kaluga”
Authors: Kurbakov D N , Kuznetsov V K , Sidorova H V , Andreeva N V , Sarukhanov A V , Nushtaeva V E 
Published: November 2020

Abstract
The object of the study was the snow cover in the 30 km zone of influence of the electrometallurgical plant LLC NLMK-Kaluga. As a result of the research, the polyelement composition of the solid fraction, dust load, influx of heavy metals (Fe, Cr, Zn Mn, Ni, Co, Pb, Cu, Cd), concentration factors and total indicators of contamination with heavy metals, as well as the cationic and anionic composition of thawed snow cover waters. It has been established that the intensity of snow cover pollution depends on the direction and distance from the source of pollution. The maximum effect of technogenic impact up to 8 times relative to background values was observed in the near 2 km zone. With increasing distance to 16 km, the dust load decreases and does not exceed 1.5 times. According to the research results, factors influencing the intensity of snow cover pollution have been established.
Personal protective equipment screening efficiency depends on power frequency electric field exposure conditions
Authors: Perov S Yu , Belaya O V , Konshina T A , Askerova S A 
Published: November 2020

Abstract
One of the main occupational factors of switchyard and overhead power lines is the power frequency electric field. The most optimal method provides safe occupational conditions (power frequency electric field levels lower maximum permissible) is using personal protective equipment. The aim of the research was personal protective equipment screening efficiency assessment under various work conditions. Two methods were used: indirect IEC 60895-2002 method measuring currents and direct GOST 12.4.172-2019 method measuring power frequency electric field strength. Screening efficiency assessment was carried out on two high-voltage laboratory test setup and in real work conditions on switchyard using human body phantoms. Data analysis showed high sensitivity of IEC 60895-2002 method in the case vertical position of human body phantom, and less sensitivity this method in the case horizontal position compared to the direct method. There were significant differences between screening factors were measured by two methods. Research results confirm screening factor changing to 60 dB in new GOST 12.4.172-2019 to comply with international requirements.
Induction of chromosome aberrations in B14-150 cells following carbon ions irradiation at low doses
Authors: Troshina M V , Koryakina E V , Potetnya V I , Koryakin S N , Pikalov V A , Antipov M Yu 
Published: November 2020

Abstract
Dose-dependences of the chromosomal aberrations induction in B14-150 cells were studied for carbon ions (E ∼455 MeV/nucleon) with different values of the linear energy transfer (LET): 10-12 keV/μm (proximal region of the Bragg curve - plateau) and 25-27 keV/μm (tail of the Bragg curve). It is shown that the level of chromosome aberrations was higher for irradiation at tail of carbon beam. The dose relations were described by a modified linear-quadratic model and had a similar character in the studied dose range of 0.05-2.5 Gy. A sharp increase of the chromosome aberrations yield at the dose range up to 0.1 Gy (hyper-radiosensitivity, HRS), slowdown in it at the range of 0.1-0.3 Gy (induced radioresistance, IRR) and a further its’ growth above 0.3 Gy were observed with a transformation to linear and linear-quadratic dependences. The results obtained agree with the known literature data and indicates the likeness of the biological effect of hyper-radiosensitivity and induced radioresistance (HRS/IRR) for different cell lines.